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    Table of Contents
  1. Intro
  2. Design
    1. Stand
    2. Back
    3. Borders
    4. Thickness
    5. Temperature
    6. Build Quality
  3. Picture Quality
    1. Contrast
    2. Local Dimming
    3. SDR Peak Brightness
    4. HDR Peak Brightness
    5. Gray Uniformity
    6. Viewing Angle
    7. Black Uniformity
    8. Gradient
    9. Pre Calibration
    10. Post Calibration
    11. 480p Input
    12. 720p Input
    13. 1080p Input
    14. 4k Input
    15. Color Gamut
    16. Color Volume
    17. Image Retention
    18. Reflections
    19. 3D
    20. Pixels
  4. Motion
    1. Motion Blur
    2. Image Flicker
    3. 24p Playback
    4. Motion Interpolation
  5. Inputs
    1. Input Lag
    2. Supported Resolutions
    3. Side Inputs
    4. Rear Inputs
    5. Total Inputs
    6. Inputs Specifications
  6. Sound Quality
    1. Frequency Response
    2. Distortion
  7. Smart Features
    1. Interface
    2. Ads
    3. Apps and Features
    4. Remote
    5. Remote App
    6. TV Controls
    7. In The Box
    8. Misc
  8. Sizes and Variants
  9. Compared
  10. Conclusion
  11. Q&A
Reviewed on Jun 02, 2017 , Ian Cumming, Mehdi Azzabi, Eric Bousquet, Martin Leduc

LG UJ6300
TV REVIEW

Usage Ratings
Version 1.1
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Test Benches:

  • 1.1: Summer 2017
  • 1.0: Winter 2015
  • 0.9: Winter 2014
  • 0.8: Winter 2013
Recommended if under (USD)
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What it is: Maximum price to be a better value than its competitors.
How to use it: This product is the best choice in its range if you can find it below this price.
Automatically calculated every hour based on the scores and prices of all other products we've tested.
Mixed Usage
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What it is General purpose. The TV will be used for a variety of content and usages. Movies at night, TV shows during the day, video games from time to time, etc.
Score components:
6.8 $300
Movies
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What it is Movies in the dark. The TV will be used for watching movies in a controlled environment, directly in front, in a home theater way. Mostly only high quality content, like Blu-rays, UHD Blu-rays, streaming and a little bit of HDR.
Score components:
5.9 $260
TV Shows
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What it is TV Shows in a bright living room. The TV will be used in to watch TV shows, in a bright room during the day, from multiple viewing positions at different angles. The content watched has an average quality: cable, streaming, SD channels, etc.
Score components:
7.1 $450
Sports
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What it is Sports in a living room. The TV will be used to watch sports during the day, like football or hockey. Usually watched with a group, so from multiple viewing position.
Score components:
6.9 $410
Video Games
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What it is Video games. The TV will be used to play video games, directly in front, in a controlled light environment. Usually fast games, like online FPS, where motion blur and input lag is important.
7.5 $300
HDR Movies
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What it is HDR Movies and TV shows. The TV will be used to watch 4k UHD HDR content, with a wide color gamut and a high peak brightness. Either via UHD Blu-rays or HDR streaming.
5.9 $300
HDR Gaming
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What it is HDR Gaming. The TV will be used to play HDR video games using consoles that support it or on current generation gaming PCs. Xbox One S, PS4 Pro, GTX 10 series and AMD RX series graphics cards.
7.1 $300
PC Monitor
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What it is PC Monitor. The TV will be used as a PC monitor, from 2-3 feet away, either for productivity purposes or gaming. Sharp text is important, as well as a high resolution.
7.4 $300
Type : LED
Resolution : "4k"
Refresh Rate : 60 Hz

The LG UJ6300 UHD RGBW LED TV is an ordinary TV with a wider than average viewing angle. It features the best smart platform available and impressively low input lag. The out of the ordinary "RGBW" pixel structure also can cause smaller details and straight lines to lose sharpness.

Test Results
Design 6.5
Picture Quality 6.5
Motion 7.3
Inputs 9.6
Sound Quality 6.1
Smart Features 7.8
Pros
  • Very low input lag
  • Low motion blur
Cons
  • Not very bright
  • Blacks aren't uniform
  • Uses less accurate RGBW pixel structure
Update 8/10/2017: Converted to Test Bench 1.1. Learn more about our new versioned test bench system here.

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6.5

Design

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Score components: Subjectively assigned
LG UJ6300 Design Picture
Curved : No

The design of the UJ6300 is very basic, and everything is made of plastic. There are no stylistic elements like the higher end UJ7700, and the TV doesn't look bad but it certainly won't be the centerpiece of any room. Some of the rear-facing inputs may be difficult to access if placed close to a wall.

Stand
LG UJ6300 Stand Picture

The stand is almost as wide as the TV and looks similar to the UH6100 from 2016. It is made of plastic but supports the TV quite well.

Footprint of the 49" TV stand: 7.5" x 33.5"

Back
LG UJ6300 Back Picture
Wall Mount : Vesa 200x200

The rear of the TV is simple, and a similar design but slightly less reflective than the UJ7700. Some of the inputs which face out the back of the TV may be difficult to access if the TV is placed close to a wall or VESA mounted.

Borders
LG UJ6300 Borders Picture
Borders : 0.79" (2 cm)

The borders of the TV are slightly thicker than average, but due to their tapered edge, they don't appear too thick. They are made of plastic.

Thickness
LG UJ6300 Thickness Picture
Max Thickness : 3.23" (8.2 cm)

The TV is quite thick, with the thickest part near the base of the TV below the inputs. It will stick out from the wall a bit if mounted.

Temperature
LG UJ6300 Temperature picture
Maximum Temperature
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What it is: The peak temperature found on the TV.
Good value: <35°C
Noticeable difference: <5°C
:
35 °C
Average Temperature
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What it is: The Average temperature measured on the TV
When it matters: If the TV is placed in an enclosed space.
Good value: 30
Noticeable difference: 5
:
33 °C

The TV is fairly cool, only getting slightly warm along the top edge and a few places on the back. As with most TVs, there are vents on the bottom edge and a vent on the back of the TV, near the top.

6.0 Build Quality
LG UJ6300 Build quality picture

The build quality of the UJ6300 is decent. Everything is made of plastic, but these parts certainly won't break under normal use.

6.5

Picture Quality

The LG UJ6300 LED TV has an average picture quality. If set in a dark room, the low contrast ratio and the poor black uniformity of the UJ6300 result in disappointing dark scenes, with blacks tending to look gray rather than actually black. When set in a bright room, those two aspects of the picture quality are a bit less problematic, since the ambient light will reduce the effect of the low contrast ratio. Even then, if the light is a bit too intense, then the below-average SDR peak brightness may not be enough to fight glare. The gray uniformity could be better, but luckily dirty screen effect is not too problematic and paired with the passable viewing angle performance, the UJ6300 could be used in a wide living room to watch sports with a large group of people. Lastly, the HDR performance could be better. It can't produce saturated colors and has an average HDR peak brightness and also lacks local dimming so HDR content doesn't stand out.

6.5 Contrast
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What it is: Brightness difference between white and black. This is the main component of picture quality.
When it matters: Always, but especially when watching dark scenes.
Score components:
LG UJ6300 Checkerboard Picture
Native Contrast
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What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
1314 : 1
Contrast with local dimming
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What it is: Ratio of the white brightness divided by the blacks measured on our checkerboard test pattern with local dimming turned on (maximum) with a white target of 100 cd/m².
When it matters: Dark scenes in a dark room.
Good value: > 3,000
Noticeable difference: 500
:
N/A

The LG UJ6300 has a passable contrast ratio for a LED TV. This low contrast ratio makes dark scenes appear washed-out and makes blacks appear more gray than really black, especially when set in a dark room. The TV fares much better when set in a bright room since the light usually makes the low contrast ratio less noticeable.

If you compare this IPS TV with other IPS TVs we have reviewed before, the UJ6300 contrast ratio of 1314:1 is actually better than most of them.

0 Local Dimming
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What it is: The lights behind the LCD layer adapt to the picture displayed, improving the contrast ratio.
When it matters: Dark scenes viewed in a dark room.
Score components: Subjectively assigned
Local Dimming
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What it is: Whether it has a feature that controls the LEDs behind the LCD layer, to match the picture and darkens the dark portion of it.
When it matters: On LED TVs only. Dark scenes viewed in a dark room.
:
No
Backlight
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What it is: Configuration of the lights of the backlight.
When it matters: Effectiveness of the local dimming.
Good value: Full-array/direct lighting is better for local dimming. As for the uniformity of the screen, it depends on the implementation. Some edge-lit TVs have more uniform blacks than some full-array TVs.
:
Direct

The UJ6300 does not have a local dimming feature. The video is for reference only.

5.5 SDR Peak Brightness
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What it is: How bright the screen can get. Measured with local dimming and with SDR content.
When it matters: Bright living rooms; bright objects; SDR content.
SDR Real Scene Peak Brightness
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What it is: The maximum luminosity the TV can obtain while playing a movie or while watching a TV show. This scene was selected to represent a more regular movie condition. All measurement are made with the TV set to be as bright as possible, but with a 6500k white. Measured with local dimming, max backlight and over SDR signal. Scene: here.
When it matters: When watching movies or watching TV show in SDR.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
174 cd/m2
SDR Peak 2% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, present on screen for a short time; especially for SDR content.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
167 cd/m2
SDR Peak 10% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, present on screen for a short time; especially for SDR content.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
168 cd/m2
SDR Peak 25% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright rooms; bright objects in SDR video.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
169 cd/m2
SDR Peak 50% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright rooms.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
171 cd/m2
SDR Peak 100% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright rooms
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
175 cd/m2
SDR Sustained 2% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright highlights, persistent throughout a scene; especially for SDR content.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
167 cd/m2
SDR Sustained 10% Window
Show Help
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright objects, persistent throughout a scene; especially for HDR content.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
167 cd/m2
SDR Sustained 25% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright rooms; bright objects in SDR video.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
168 cd/m2
SDR Sustained 50% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright rooms.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
170 cd/m2
SDR Sustained 100% Window
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What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over SDR signal.
When it matters: Bright rooms.
Good value: > 300 cd/m²
Noticeable difference: 30 cd/m²
:
174 cd/m2
SDR ABL
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What it is: The standard deviation of the SDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: Content with large bright areas, such as for PC or video game use, and sports such as hockey
Good value: <0.07
Noticeable difference: 0.01
:
0.003

Disappointing SDR peak brightness in the 'Expert (Dark Room)' picture mode. While this mode has the most accurate picture quality, it is much dimmer than the 'Standard' picture mode, as shown in this brightness plot. If you find the TV not bright enough, it's best to use the 'Standard' mode with a color temperature of 'W30' and as many of our recommended settings as applicable.

With 'Expert (Dark Room)' the TV is only bright enough for a really dark room, while with 'Standard' it is bright enough for a moderately lit room.

6.1 HDR Peak Brightness
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What it is: How bright the screen can get. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright living rooms; bright objects; HDR content.
HDR Real Scene Peak Brightness
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What it is: The maximum luminosity the TV can obtain while playing a movie or while watching a TV show. This scene was selected to represent a more realistic movie condition. All measurement are made with the TV set to be as bright as possible, but with a 6500k white. Measured with local dimming, max backlight and over HDR signal. Scene: here.
When it matters: When watching movies or watching TV show in HDR.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
297 cd/m2
HDR Peak 2% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, present on screen for a short time; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
319 cd/m2
HDR Peak 10% Window
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What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright objects, present on screen for a short time; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
319 cd/m2
HDR Peak 25% Window
Show Help
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms; bright objects in HDR video.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
318 cd/m2
HDR Peak 50% Window
Show Help
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
318 cd/m2
HDR Peak 100% Window
Show Help
What it is: The maximum luminosity, even if only maintained for a short time, of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
318 cd/m2
HDR Sustained 2% Window
Show Help
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 2% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright highlights, persistent throughout a scene; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
317 cd/m2
HDR Sustained 10% Window
Show Help
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 10% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright objects, persistent throughout a scene; especially for HDR content.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
318 cd/m2
HDR Sustained 25% Window
Show Help
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 25% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms; bright objects in HDR video.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
317 cd/m2
HDR Sustained 50% Window
Show Help
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 50% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
317 cd/m2
HDR Sustained 100% Window
Show Help
What it is: The lowest maximum luminosity (usually after it has stabilized) of a white square covering 100% of the screen, with the TV set to be as bright as possible. Measured with local dimming and over HDR signal (if supported).
When it matters: Bright rooms.
Good value: > 550 cd/m²
Noticeable difference: 80 cd/m²
:
317 cd/m2
HDR ABL
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What it is: The standard deviation of the HDR sustained brightness, after linearizing for noticeable differences in luminosity
When it matters: HDR content with large bright areas, such as HDR gaming
Good value: <0.07
Noticeable difference: 0.01
:
0.0

Mediocre HDR peak brightness. The brightness doesn't change depending on the content shown, as all our tests were about equal (the real scene test is measured at the edge of the screen which is dimmer). This constant brightness is a good thing, but it's still not nearly as bright as intended for HDR content. A plot of brightness over time is shown here.

If you find HDR content too dim in the 'Cinema' and 'Game' picture modes, you can enable 'Dynamic Contrast', as explained here. This won't increase the brightness of highlights but it will make most of the scene brighter, at the cost of slightly worse picture quality. The 'Standard' picture mode is even brighter, but also has worse picture quality than 'Movie'. This can be alleviated somewhat by using our recommended settings with a 'W30' color temperature.

6.9 Gray Uniformity
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What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
LG UJ6300 50% Uniformity Picture
50% Std. Dev.
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What it is: Average squared difference of pixels when displaying a mid 50% gray.
When it matters: Solid colors. Sports, panning shots.
Good value: < 2.5%
Noticeable difference: 1%
:
5.567 %
50% DSE
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What it is: High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Solid colors. Sports, panning shots.
Good value: < 0.165%
Noticeable difference: 0.025%
:
0.21 %
LG UJ6300 5% Uniformity Picture
5% Std. Dev.
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What it is: Average squared difference of pixels when displaying a mid 5% gray.
When it matters: Dark scenes.
Good value: < 1.15%
Noticeable difference: 1%
:
0.657 %
5% DSE
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What it is: High-frequency variance of uniformity. Dark spots on the screen.
When it matters: Dark scenes.
Good value: < 0.116%
:
0.069 %

The gray uniformity of the UJ6300 could be better. The 50% standard deviation is pretty high, and this is caused mostly because of the darker edges corners, as you can see on the 50% gray uniformity test picture. Some vertical bands are slightly visible near the center, but dirty screen effect is not that much noticeable when watching content like sport, which is better than what we had on the UJ7700.

Looking at the 5% gray uniformity picture and numbers, not much stand out and these are very good results.

6.2 Viewing Angle
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What it is: Color accuracy when viewed from the side.
When it matters: Large living rooms with multiple viewing positions.
Score components:
LCD Type
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What it is: Type of LCD technology used by the TV.
When it matters: Different technologies have different viewing angle properties.
Good value: IPS maintains good color accuracy at an angle, but has a poor contrast ratio from in front. VA has great picture quality in front, but loses saturation at an angle.
:
IPS
LG UJ6300 Color Shift Picture
Color Shift
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What it is: Angle where the colors noticeable shift compared to when viewed from directly in front of the TV. 0 ° means directly facing the TV. Measurements are up to a maximum of 75 °.
When it matters: Large living rooms with multiple viewing positions.
Good value: > 50°
Noticeable difference: 10°
:
22 °
LG UJ6300 Brightness Picture
Brightness
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What it is: Angle where the brightness drops to 50% of the brightness directly in front of the TV. 0 ° means directly facing the TV. Measurements are up to a maximum of 75 °.
When it matters: Large living rooms with multiple viewing positions.
Good value: > 50°
Noticeable difference: 10°
:
29 °
LG UJ6300 Black Level Picture
Black Level
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What it is: Angle where the black level drops to 50% of the black level directly in front of the TV. 0 ° means directly facing the TV. Measurements are up to a maximum of 75 °.
When it matters: Large living rooms with multiple viewing positions.
Good value: > 50°
Noticeable difference: 10°
:
75 °

Mediocre viewing angle, better than almost all VA TVs but not as good as some other IPS TVs such as the UH6150. Blacks remain essentially unchanged no matter the angle, but colors shift and brightness decreases at moderate angles.

4.2 Black Uniformity
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What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
LG UJ6300 Native Black Uniformity Picture
Native Std. Dev.
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What it is: Average of the squared difference of the blacks.
When it matters: Dark scenes viewed in a dark room.
Good value: < 1%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
3.168 %
Std. Dev. w/ L.D.
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What it is: Average of the squared difference of the blacks with Local Dimming enabled
When it matters: Dark scenes viewed in a dark room.
Good value: < 1%
Noticeable difference: 1%, but keep in mind that it varies a lot by unit, even of the same model; yours likely will not end up exactly like ours.
:
N/A

The UJ6300 black uniformity is poor. Most of the uniformity issues are due to the darker edges and corners, similarly to what affected the gray uniformity. Only the right upper corner is a bit brighter than the rest of the screen. Some vertical lines are also visible toward the right side of the screen.

8.4 Gradient
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What it is: How finely levels of color can be displayed.
When it matters: Details in shadows, sky and skin tones. Matters more for HDR content.
Score components: Subjectively assigned
LG UJ6300 Gradient Picture
Color Depth
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What it is: Number of bits per pixel to represent a specific color. Note: we consider 8-bit with dithering to be equivalent to 10-bit, as long as the 10-bit gradient looks smooth.
When it matters: HDR content like UHD Blu-ray players. Won't matter for cable TV, regular Blu-ray movies, video game consoles or content displayed from a Windows PC. Those are limited to 8-bit color.
Good value: 10-bit.
Noticeable difference: 1 bit.
:
10 Bit

The UJ6300 can display our test gradient image pretty well and without any banding problems. Some little imperfections can be seen in the dark blue and green, but those are very minor does not affect regular content.

5.0 Pre Calibration
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What it is: TV's color accuracy before a full calibration. Only the picture mode, color temperature, and backlight level were changed.
When it matters: All video on an uncalibrated TV. This represents most people's use cases.
Score components:
LG UJ6300 Pre Calibration Picture LG UJ6300 Pre Gamma Curve Picture LG UJ6300 Pre Color Picture
White Balance dE
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What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all video.
Good value: < 3
Noticeable difference: 1
:
5.11
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
4.84
Gamma
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What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.21

Out of the box, the UJ6300 accuracy could be better. The white balance dE and the color dE are high enough that almost anybody could notice it, even if not an enthusiast. The white balance is on the warm side, missing mostly blue. Looking at the color accuracy, all the color are a bit off, with the blues and cyans being the one with the higher dE. Overall, the gamma curve is not very flat, but the gamma number is not that far from our 2.2 target.

9.1 Post Calibration
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What it is: TV's color accuracy after a full calibration with a spectrophotometer.
When it matters: All video on a TV that has been professionally calibrated. This isn't that useful, because most TVs can achieve a pretty good calibration if you spend enough time on them.
Score components:
LG UJ6300 Post Calibration Picture LG UJ6300 Post Gamma Curve Picture LG UJ6300 Post Color Picture
White Balance dE
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What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all videos.
Good value: < 3
Noticeable difference: 1
:
0.24
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
2.05
Gamma
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What it is: Brightness of shades of gray.
When it matters: Shadows.
Good value: Between 2.1 and 2.3 (our target is 2.2)
Noticeable difference: 0.1
:
2.19

The calibration process of the UJ6300 was a bit longer than usual, but this is mostly because the setting menu was affecting the measurements. This happens from time to time depending on the TV models, but in that particular case, we had to go out of the menu every time before taking some reading. Besides that, the process worked pretty well, and the high white balance dE what corrected and brought down to a negligible 0.24, which is an excellent result. As the consequence of the correction of the white balance, the gamma was flattened to track more closely our 2.2 target.

When it comes to the color accuracy, the provided color management system has proven to be quite good, even though some colors, mostly in the blue and red, were still a bit off. But even with this small error, the total color dE is now more than half what is was before calibration.

You can see our recommended settings here.

8.0 480p Input
Show Help
What it is: Quality of a 480p input.
When it matters: Standard definition TV, DVDs.
Score components: Subjectively assigned
LG UJ6300 480p Picture

Upscaling of low-quality content such as DVDs is good. Like most LG TVs, some halo artifacts are visible along edges but this isn't much of an issue.

8.0 720p Input
Show Help
What it is: Quality of a 720p input.
When it matters: HD channels, some streaming videos.
Score components: Subjectively assigned
LG UJ6300 720p Picture

720p content such as cable looks good. Details are preserved and the image isn't too soft.

9.0 1080p Input
Show Help
What it is: Quality of a 1080p input.
When it matters: Blu-rays, streaming video, video files, video games.
Score components: Subjectively assigned
LG UJ6300 1080p Picture

1080p sources such as Blu-rays look good. The image remains clear and detailed.

8.0 4k Input
Show Help
What it is: Quality of a 4k UHD input.
When it matters: Streaming video, UHD Blu-rays, some PCs.
Score components: Subjectively assigned
LG UJ6300 4k Picture

With some 4k content (such as text for PC monitor use) the less accurate RGBW pixel structure results in some artifacts. This is the same as the UH6500 and visible in the chroma test pattern of that TV here. This is also visible in the pixels photo.

7.3 Color Gamut
Show Help
What it is: How many colors the TV can display.
When it matters: HDR content. Includes some streaming videos and UHD Blu-rays.
Score components:
Wide Color Gamut
Show Help
What it is: Whether the TV has an option to enable wide color gamuts.
When it matters: HDR content. Includes some streaming videos and UHD Blu-rays.
:
No
LG UJ6300 Color Gamut DCI-P3 Picture
DCI P3 xy
Show Help
What it is: Coverage of the DCI P3 colorspace on CIE 1931 xy.
When it matters: DCI P3 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
78.92 %
DCI P3 uv
Show Help
What it is: Coverage of the DCI P3 colorspace on CIE 1976 u' v'.
When it matters: DCI P3 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
91.22 %
LG UJ6300 Color Gamut Rec.2020 Picture
Rec 2020 xy
Show Help
What it is: Coverage of the Rec.2020 colorspace on CIE 1931 xy.
When it matters: Rec.2020 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
57.08 %
Rec 2020 uv
Show Help
What it is: Coverage of the Rec.2020 colorspace on CIE 1976 u' v'.
When it matters: Rec.2020 content. Includes HDR, UHD Blu-rays.
Good value: > 90%
Noticeable difference: 5%
:
64.69 %
LG UJ6300 EOTF

Standard color gamut, only good enough for SDR Rec. 709 content. When watching HDR content, greens will be significantly undersaturated, and blues and reds too to a lesser extent. Luckily the TV is fairly accurate at showing the colors it is able to, especially P3 colors.

In the 'Cinema' and 'Game' picture modes the TV dims HDR content significantly, as shown by their EOTFs here and here. This isn't present in 'Standard', shown here, and is alleviated in 'Cinema' and 'Game' by enabling 'Dynamic Contrast', as shown here and here.

4.9 Color Volume
Show Help
What it is: How many colors a TV can display at different luminosity levels.
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
LG UJ6300 P3 Color Volume ITP Picture
Normalized DCI P3 Coverage ITP
Show Help
What it is: How much of the DCI-P3 colorspace a TV can display at different luminosity levels
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
Good value: 80%
Noticeable difference: 5%
:
56.2 %
10,000 cd/m² DCI P3 Coverage ITP
Show Help
What it is: How much of the DCI-P3 colorspace a TV can display at different luminosity levels when compared to an ideal 10,000 nit TV
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
:
19.4 %
LG UJ6300 2020 Color Volume ITP Picture
Normalized Rec 2020 Coverage ITP
Show Help
What it is: How much of the Rec. 2020 colorspace a TV can display at different luminosity levels
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
Good value: 80 %
Noticeable difference: 5 %
:
41.1 %
10,000 cd/m² Rec 2020 Coverage ITP
Show Help
What it is: How much of the DCI-P3 colorspace a TV can display at different luminosity levels when compared to an ideal 10,000 nit TV
When it matters: HDR content. Includes some streaming videos, UHD Blu-rays and HDR games.
:
13.6 %

Poor color volume. The TV's RGBW pixel structure prevents it from making bright colors nearly as bright as it can make white. Its color gamut narrows severely when showing dark colors, and its black level is not good.

5.1 Image Retention
Show Help
What it is: How much a static image is retained on a TV screen after a certain amount of time.
When it matters: When watching TV show, playing video games or when using your TV as a PC monitor.
LG UJ6300 Image Retention Picture
IR after 0 min recovery
Show Help
What it is: Image retention measured right after the static image exposure, without recovery time.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
7.85 %
IR after 2 min recovery
Show Help
What it is: Image retention measured after a recovery time of 2 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect
Noticeable difference: 0.015%
:
0.34 %
IR after 4 min recovery
Show Help
What it is: Image retention measured after a recovery time of 4 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %
IR after 6 min recovery
Show Help
What it is: Image retention measured after a recovery time of 6 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %
IR after 8 min recovery
Show Help
What it is: Image retention measured after a recovery time of 8 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %
IR after 10 min recovery
Show Help
What it is: Image retention measured after a recovery time of 10 minutes.
When it matters: When changing channels while watching TV, right after changing the type of content (i.e. stopping playing video game to watch a movie) or changing input.
Good value: 0 is perfect.
Noticeable difference: 0.015%
:
0 %

The UJ6300 suffers from image retention and it is fairly easy to notice it, as is does not take a long exposure to a still image to create some retention. As you can see on our test picture, taken right after the 10 minutes burn-in scene, the image retention is very clear and easy to see. It was also easy to notice during the review process, as we had to give it some time, running normal video content to clear up the retention, before tests like the gray uniformity, since just displaying, let's say our contrast checkerboard, did induce image retention.

On the good side, the retention does not last very long, even if it is pretty strong at the beginning. As you can see from the test results, after 4 minutes of recovery time, the image retention was completely gone and the screen was back to normal.

7.5 Reflections
Show Help
What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
LG UJ6300 Reflections Picture LG UJ6300 Bright Room Picture
Reflection
Show Help
What it is: Ratio of ambient light reflected by the TV.
When it matters: Ambient light in the room.
Good value: < 1%
Noticeable difference: 0.5%
:
1.9 %
Screen Finish
Show Help
What it is: Type of coating on the screen.
When it matters: Bright objects in the direct reflection path (for example, opposite the TV).
Good value: Glossy is good for ambient light, but not for direct reflections.
:
Semi-gloss

The UJ6300 is quite good at handling reflections. The screen is semi-gloss which helps to reduce the intensity of direct reflections but does diffuse them across the screen. For a room with a couple of windows, this is not an issue, but bright glare on the screen may be a problem.

0 3D
Show Help
What it is: Optional 3D video capability on TV.
When it matters: 3D movies and videos.
Score components: Subjectively assigned
3D
Show Help
What it is: If it can display a picture in 3D.
When it matters: 3D movies & videos.
:
No
3D Type
Show Help
What it is: The 3D technology used by the TV.
When it matters: 3D movies & videos.
Good value: Active have better resolution, but flickers. Passive is more comfortable, but loses half the vertical resolution.
:
No
2D to 3D
Show Help
What it is: Feature that converts 2D content to 3D.
When it matters: If you want to watch 2D content in 3D. Note that the quality is not as good as that of native 3D.
:
No

The LG UJ6300 does not support 3D.

Pixels
LG UJ6300 Pixels Picture

The less accurate RGBW pixel structure causes some artifacts when viewing some 4k content (such as PC text) from up close.

7.3

Motion

The motion handling of the UJ6600 is average. It has a fast response time, resulting in only a short trail following fast moving objects. The backlight flickers by default, and there is, unfortunately, no option to reduce this frequency and clear up fast-paced content. Movies from a Blu-ray player or DVDs are smooth, but some minor judder is present when movies are watched from a HTPC or cable. Most people don't notice this so it isn't an issue. The TV has a 60Hz panel which is able to interpolate lower frame rate content.

7.9 Motion Blur
Show Help
What it is: Amount of blur on fast movement.
When it matters: Sports, video games.
Score components:
LG UJ6300 Motion Blur Picture LG UJ6300 Response Time Chart 2
80% Response Time
Show Help
What it is: How quickly pixels can reach 80% of a full transition from one color to another.
When it matters: Fast movement.
Good value: < 8 ms
Noticeable difference: 4 ms
:
7.1 ms
100% Response Time
Show Help
What it is: How quickly pixels can fully transition from one color to another.
When it matters: Fast movement.
Good value: < 20 ms
Noticeable difference: 10 ms
:
16.7 ms

The response time is good, so only a short trail can be seen following fast-moving objects. This is similar to the UJ7700.

2.8 Image Flicker
Show Help
What it is: Luminosity pattern when displaying images
When it matters: Sports, video games, when TV is used as a PC monitor
Score components:
LG UJ6300 Backlight Picture
PWM Dimming Frequency
Show Help
What it is: Flickering pattern at different luminosities.
When it matters: For people sensitive to flickering.
Good value: N/A or high frequencies (> 300 Hz). Frequencies that are multiples of 60Hz are better.
:
120 Hz
BFI
Show Help
What it is: Option to turn screen black between frames
When it matters: Reduces eye tracking blur in sports or video games
Good value: Yes
:
No
BFI Frequency
Show Help
What it is: Lowest possible frequency of flickering pattern
When it matters: Reduces eye tracking blur in sports or video games
Good value: 60 Hz
:
120 Hz
BFI In Game Mode
Show Help
What it is: Option to insert black frames when in the best settings for gaming
When it matters: Reducing eye tracking blur for video games
Good value: Yes
:
No

The TV uses PWM at 120Hz to dim the backlight, starting at 100/100 backlight setting. Lowering the setting shortens the duty cycle, while amplitude remains nearly constant. Backlight PWM helps clear up motion slightly, but results in duplications following fast-moving objects, visible in the motion blur box. The backlight oscilloscope was taken in HDR mode, as the TV doesn't utilize its full brightness in SDR. 100% backlight in SDR looks like this. Like with other LG TVs, there is no option to reduce the flicker frequency and use black frame insertion to clear up fast-paced content.

7.1 24p Playback
Show Help
What it is: Whether 24p content can play without any judder.
When it matters: Only 24p content (mostly just movies).
Judder-free 24p
Show Help
What it is: Judder-free movies over 24p signal.
When it matters: Blu-ray and DVD movies; 24 hz PC signal.
:
Yes
Judder-free 24p via 60p
Show Help
What it is: Judder-free movies over 60p signal.
When it matters: Movies from streaming devices (Apple TV, Fire TV, etc.); 60 hz PC signal.
:
No
Judder-free 24p via 60i
Show Help
What it is: Judder-free movies over 60i signal.
When it matters: Movies from cable/satellite boxes.
:
No

Only 24p movies playing from 24p sources like DVD and Blu-rays players are judder free. The UJ6300 can't remove judder from 24p movies playing from 60p/60i sources like cable and satellite boxes.

To be able to display 24p movies without judder when playing from 24 sources, the 'Real Cinema setting must be turned on.

7.0 Motion Interpolation
Show Help
What it is: Also known as 'Soap Opera Effect'. It is an optional feature that increases the frame rate of the video, smoothing movement.
When it matters: If you like the look of smoothed video. Not everyone does.
Motion Interpolation (30 fps)
Show Help
What it is: Whether the TV can take a 30 fps input and heighten the frame rate to at least 60 fps.
When it matters: 30 fps or lower videos. Includes movies, TV shows, some video games.
:
Yes
LG UJ6300 Motion Interpolation (30 fps) Picture
Motion Interpolation (60 fps)
Show Help
What it is: Whether the TV can take a 60 fps input and heighten the frame rate to at least 100 fps.
When it matters: 60 fps videos. Includes some video games, some sports channels.
:
No

The UJ6300 has a 60Hz panel and can interpolate lower frame rate content by setting 'TruMotion' to 'User' and increasing the 'De-Judder' slider. However, the UJ6300 can't produce as strong of a soap opera effect as 120Hz TVs such as the UH7700 from 2016, and cannot interpolate 60Hz content. Note that any motion interpolation will introduce artifacts, so use a small value unless you really like the soap opera effect. There are also some bugs in the interpolation which causes more stuttering than usual, especially with our full-screen pattern.

9.6

Inputs

Show Help
Score components:

The UJ6300 supports nearly all the common input signals, including HDR, and should be able to properly display any content. It also has incredibly low input lag which should please almost any gamer.

9.9 Input Lag
Show Help
What it is: Delay between input and onscreen reaction.
When it matters: Video games; when TV is used as PC monitor.
4k @ 60Hz
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz.
When it matters: Video games and also when TV is used as PC monitor.
Good value: < 40ms
Noticeable difference: 15 ms
:
11.9 ms
1080p @ 60Hz
Show Help
What it is: Lowest input lag possible on TV with a 1080p @ 60Hz input.
When it matters: Video games and also when TV is used as PC monitor.
Good value: < 40ms
Noticeable difference: 15ms
:
11.4 ms
4k @ 60Hz + HDR
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz with HDR.
When it matters: HDR Video games.
Good value: < 40ms
Noticeable difference: 15 ms
:
12.0 ms
1080p @ 60Hz + HDR
Show Help
What it is: Lowest input lag possible on the TV when displaying 1080p @ 60Hz with HDR.
When it matters: HDR video games from a console outputting a 1080p signal.
Good value: < 40ms
Noticeable difference: 15ms
:
12.2 ms
4k @ 60Hz Outside Game Mode : 66.8 ms
1080p @ 60Hz Outside Game Mode
Show Help
What it is: Input lag in picture modes other than the specific game mode.
When it matters: For playing video games while retaining access to all features of the TV.
Good value: < 40ms
Noticeable difference: 15ms
:
49.8 ms
4k @ 60Hz @ 4:4:4
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz @ 4:4:4.
When it matters: PC Monitor
Good value: < 40ms
Noticeable difference: 15 ms
:
11.4 ms
1080p @ 60Hz @ 4:4:4
Show Help
What it is: Lowest input lag possible on TV when displaying 1080p @ 60Hz @ 4:4:4
When it matters: PC monitor.
Good value: < 40ms
Noticeable difference: 15 ms
:
11.2 ms
4k @ 60Hz @ 4:4:4 + 8 bit HDR
Show Help
What it is: Lowest input lag possible on TV when displaying 4k @ 60Hz @ 4:4:4 with HDR enabled at 8 bit
When it matters: PC Monitor with an HDR capable graphic card
Good value: < 40ms
Noticeable difference: 15 ms
:
N/A
1080p @ 60Hz @ 4:4:4 + HDR
Show Help
What it is: Lowest input lag possible on TV when displaying 1080p @ 60Hz @ 4:4:4 with HDR
When it matters: PC monitor with an HDR capable graphics card
Good value: < 40ms
Noticeable difference: 15ms
:
N/A
4k With Interpolation : 94.5 ms
1080p With Interpolation
Show Help
What it is: Lowest input lag when the motion interpolation feature is turned on.
When it matters: When you want to play video games with the Soap Opera Effect enabled.
Good value: < 40ms
Noticeable difference: 15ms
:
99.8 ms

Outstanding low input lag. When in the Game picture mode or in any picture mode, when the input's icon is set to PC, the TV's input lag is an excellent ~11 ms, which should please almost any gamer. However, only the Game picture mode has low input lag for HDR content, as when HDR content is played, when the input's icon is set to PC, the TV acts as though the icon is not PC.

8.0 Supported Resolutions
Show Help
What it is: Different resolutions supported by TV.
When it matters: PC monitor usage.
Score components:
  • 20% 1080p @ 60Hz @ 4:4:4
  • 20% 1080p @ 120Hz
  • 20% 4k @ 30Hz @ 4:4:4
  • 20% 4k @ 60Hz
  • 20% 4k @ 60Hz @ 4:4:4
1080p @ 60Hz @ 4:4:4
Show Help
What it is: Crisp text on 1060p @ 60 hz signal.
When it matters: PC productivity and 60 fps gaming.
:
Yes
1080p @ 120Hz
Show Help
What it is: 120 fps 1080p signal supported.
When it matters: PC gaming.
:
No
4k @ 30Hz @ 4:4:4
Show Help
What it is: Crisp text on 4k @ 30 hz signal.
When it matters: PC productivity and gaming.
:
Yes
4k @ 60Hz
Show Help
What it is: 60 fps 4k signal supported.
When it matters: PC productivity and gaming.
:
Yes
4k @ 60Hz @ 4:4:4
Show Help
What it is: Crisp text on 4k @ 60 hz signal.
When it matters: Productivity and 60 fps gaming in 4k.
:
Yes

Most of the common input resolutions are supported. 4:4:4 color is only properly displayed when the input's icon is set to PC. 4k @ 60 Hz @ 4:2:2 or 4:4:4 color can only be played when 'HDMI ULTRA HD Deep Color' is enabled for the input being used. 4:4:4 color is not properly displayed for HDR content, because when HDR content is played when the input's icon is PC the TV acts as though the input's icon wasn't PC.

Although 4:4:4 color is displayed properly, the screen's RGBW pixel structure produces artifacts when showing fine color detail, artifacts like jagged lines and missing pixels. This is shown here on our 4:4:4 test image when displayed on the RGBW UH6500. The same image displayed on an RGB TV like the Sony X750D has no such artifacts, as shown here. These artifacts aren't a huge problem but they are noticeable at times when using the TV as a PC monitor.

Side Inputs
Rear Inputs
Total Inputs
HDMI : 3
USB : 2
Digital Optical Audio Out : 1
Analog Audio Out 3.5mm : 0
Analog Audio Out RCA : 0
Component In : 1 (shared)
Composite In : 1 (shared)
Tuner (Cable/Ant) : 1
Ethernet : 1
DisplayPort : 0
IR In : 0
SD/SDHC : 0

Inputs Specifications
HDR10
Show Help
What it is: Standard HDR format.
When it matters: Most common format. All UHD Blu-ray discs are required to have it.
:
Yes
Dolby Vision
Show Help
What it is: Better format, due to its dynamic nature.
When it matters: Currently, only available via streaming.
:
No
5.1 Passthrough ARC Dolby Digital
Show Help
What it is: TV can receive and pass Dolby Digital 5.1 signal to receiver via HDMI ARC.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
5.1 Passthrough ARC DTS
Show Help
What it is: TV can receive and pass DTS 5.1 signal to receiver via HDMI ARC.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
5.1 Passthrough Optical Dolby Digital
Show Help
What it is: TV can receive and pass Dolby Digital signal to receiver via digital optical.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
5.1 Passthrough Optical DTS
Show Help
What it is: TV can receive and pass DTS signal to receiver via digital optical.
When it matters: 5.1 audio on DVDs and Blu-rays.
:
Yes
HDMI 2.0 Full Bandwith : Yes (HDMI 1,2,3)
ARC : Yes (HDMI 2)
USB 3 : No
HDCP 2.2 : Yes (HDMI 1,2,3)
CEC : Yes
MHL : No
Variable Analog Audio Out : No

6.1

Sound Quality

Show Help
What it is: How well and accurately the audio is reproduced.
When it matters: When a good and accurate sound reproduction is needed.
Score components:

The UJ6300, unfortunately, doesn't sound good. Like every TV in this price range, any decent sound bar or entry-level speaker system will provide a significant upgrade to the overall experience.

6.1 Frequency Response
Show Help
What it is: How accurately the sound level of each frequency is being produced.
When it matters: For a balanced and neutral sound.
LG UJ6300 Frequency Response
Low-Frequency Extension
Show Help
What it is: The lowest frequency at which the frequency response reaches -3dB of the target response.
When it matters: Movies, Gaming. Shows how extended the bass is.
Good value: < 60Hz
Noticeable difference: 10Hz
:
100.79 Hz
Std. Dev. @ 70
Show Help
What it is: The amount of deviation (weighted standard deviation) in frequency response measured at 70dB SPL, as compared to a target response that would sound perfectly balanced to most people.
When it matters: Shows the TV's frequency response at quiet listening levels
Good value: < 4 dB
Noticeable difference: 0.5 dB
:
4.19 dB
Std. Dev. @ 80
Show Help
What it is: The amount of deviation (weighted standard deviation) in frequency response measured at 80dB SPL, as compared to a target response that would sound perfectly balanced to most people.
When it matters: Shows the TV's frequency response at moderate listening levels
Good value: < 4 dB
Noticeable difference: 0.5 dB
:
4.24 dB
Std. Dev. @ Max
Show Help
What it is: The amount of deviation (weighted standard deviation) in frequency response measured with the TV at maximum volume, as compared to a target response that would sound perfectly balanced to most people.
When it matters: Shows the TV's frequency response at under maximum load
Good value: < 4 dB
Noticeable difference: 2 dB
:
6.2 dB
Max
Show Help
What it is: Maximum volume reached by the TV at their optimum viewing distance (size dependent)
When it matters: For listening to loud audio.
Good value: > 88 dB
Noticeable difference: 2 dB
:
84.8 dB SPL
Dynamic Range Compression
Show Help
What it is: The amount of difference between the TVs frequency response performance at 70dB SPL and Max dB SPL. Too much compression will result in pumping in the sound.
When it matters: When an accurate and free-of-pumping performance is required at higher volumes
Good value: < 3dB
Noticeable difference: 0.5
:
3.96 dB

Poor frequency response. The UJ6300's sound signature suffers from overexaggerated high-bass which causes it to sound very muddy and boomy. It's bass also doesn't extend very well, causing it to sound quite thin. It also doesn't get very loud.

6.2 Distortion
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What it is: Deformation of an output signal compared to its input, usually clipping, harmonic distortion, or inter-modulation distortion caused by non-linear behavior of the sound system.
When it matters: When a clean, pure and transparent reproduction is desired.
Score components:
LG UJ6300 Total Harmonic Distortion
Weighted THD @ 80
Show Help
What it is: The overall amount of harmonic distortion measured at 80dB SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at moderate listening levels.
Good value: < 0.100
Noticeable difference: 0.100
:
0.082
Weighted THD @ Max
Show Help
What it is: The overall amount of harmonic distortion measured at the TV's maximum SPL. To make the score more perceptually relevant, more weight is given to the higher frequencies.
When it matters: How pure the sound is at moderate listening levels.
Good value: < 0.100
Noticeable difference: 0.100
:
0.774
IMD @ 80
Show Help
What it is: The average amount of inter-modulation distortion produced by the TV under maximum load. The percentage shown here is the average result of 3 separate test signals/standards: SMPTE, DIN, & CCIF
When it matters: When a clean and free of aliasing reproduction is desired
Good value: < 5%
Noticeable difference: 2
:
2.63 %
IMD @ Max
Show Help
What it is: The average amount of inter-modulation distortion produced by the TV under maximum load. The percentage shown here is the average result of 3 separate test signals/standards: SMPTE, DIN, & CCIF
When it matters: When a clean and free of aliasing reproduction is desired
Good value: < 5%
Noticeable difference: 2
:
41.27 %

High amounts of distortion are present across the volume range on the UJ6300. As expected, it rises somewhat linearly with the level at which it is set to.

7.8

Smart Features

Show Help
Score components:
  • 42% Interface
  • 2% Ads
  • 37% Apps and Features
  • 16% Remote
  • 3% Remote App
LG UJ6300 Smart TV Picture
Smart OS : WebOS
Version : 3.5

The UJ6300 runs LG's webOS 3.5, which has a lot of advanced options while still being easy to navigate. The remote has several buttons that open quick menus to easily change common settings, yet digging deeper into the interface reveals a lot of low-level options. The included remote is unfortunately very basic and lacks the microphone and pointer features of LG's smart remote.

8.5 Interface
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What it is: The usability, features and performance of the main interface of the TV, not including the interfaces of the apps themselves.
When it matters: Anytime when using the TV, but especially when changing settings and using apps.
Score components: Subjectively assigned
Ease of Use
Show Help
What it is: How easy the interface is to navigate, affected by the organization of its layout, placing frequently accessed elements in areas that are faster to access, etc.
When it matters: When using the smart features.
:
Easy
Smoothness
Show Help
What it is: How smooth the interface is to navigate, affected by lag and frame drops.
When it matters: When using the smart features.
:
Average
Time Taken to Select YouTube
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What it is: How long it takes to select YouTube for launch, starting from HDMI 1 input, when YouTube is placed first on the list of apps or added as a shortcut. This does not include app launch time, and does not use a fixed YouTube button on a remote. This serves as an indication of the time needed to select any app.
When it matters: When launching any app.
:
4 s
Time Taken to Change Backlight
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What it is: The time it takes to navigate to the 'Backlight' setting ('Brightness' on Sony TVs). This serves as an indication of how long it takes to navigate to basic TV settings.
When it matters: When changing TV settings.
:
9 s
Advanced Options
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What it is: Whether advanced options and settings are available, such as color calibration.
When it matters: When customizing the TV and using the smart features.
:
Many

0 Ads
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What it is: Whether or not ads can be found on the TV's smart platform.
When it matters: When using the smart features.
Score components:
LG UJ6300 Ads Picture
Ads
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What it is: Whether the TV's main interface has ads. This does take into account ads in third-party apps.
When it matters: When using the smart features.
:
Yes
Opt-out
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What it is: Whether you can opt out of the ad services or not. A TV only passes this test if it allows you to remove them completely, not only disable the personalized advertising.
When it matters: When using the smart features.
:
No
Suggested Content in Home
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What it is: Whether suggested content appears in the TV's home menu or main menu. Suggested content can include recommended movies, TV shows, YouTube videos etc.
:
Yes
Opt-out of Suggested Content
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What it is: Whether the suggested content feed in the home menu can be removed or hidden
:
No

There are video ads in the LG Content Store (in the top left corner of the above picture), and static ads in search results. They cannot be removed.

8.0 Apps and Features
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What it is: The usability, features and performance of apps and other smart features.
When it matters: Only when using smart features such as apps, casting and USB playback.
Score components: Subjectively assigned
LG UJ6300 Apps Picture
App Selection
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What it is: The number and variety of apps available to download for the smart platform.
When it matters: When downloading new apps.
:
Many
App Smoothness
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What it is: How smooth it feels to navigate the interfaces of apps, affected by lag and frame drops.
When it matters: When using apps.
:
Average
Cast Capable
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What it is: Whether apps on a phone or tablet can cast content to the TV.
:
Yes
USB Drive Playback
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What it is: Whether the TV can play content from a drive connected to one of the TV's USB ports.
:
Yes
USB Drive HDR Playback
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What it is: Whether HDR files played from a USB drive can be displayed properly.
:
Yes
HDR in Netflix
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What it is: Whether HDR content on Netflix can be played back in HDR.
:
Yes
HDR in Amazon Video
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What it is: Whether HDR content on Amazon Video can be played in HDR.
:
Yes
HDR in YouTube
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What it is: Whether HDR content on YouTube can be played in HDR.
:
Yes

Many popular apps come preinstalled, such as Netflix, YouTube and Amazon Video. Apps run fairly smoothly with little lag or frame drops. Many more apps and other content can be downloaded from the LG Content Store.

6.5 Remote
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What it is: The usability and features of the TV's physical remote.
Score components: Subjectively assigned
LG UJ6300 Remote Picture
Size
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What it is: How big the remote is
:
Medium
Voice Control
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What it is: The capabilities of the TV's voice control feature
:
No
CEC Menu Control
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What it is: Whether the remote can act as a universal remote for HDMI CEC enabled devices. This was tested on our Samsung UBD-K8500 4K Blu-ray player, and may not be valid for other CEC devices as implementations vary by manufacturer.
:
Yes
Other Smart Features
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What it is: Whether the remote has any other smart features, such as a pointer, universal remote support for non HDMI CEC devices, etc.
:
No

The included remote lacks any smart features. Its rubber chunk buttons are more clumsy to press than the buttons on the remotes of higher end TVs. It has a large array of buttons, but fortunately, all the commonly used buttons are clustered around the navigation pad within easy reach, except the power and input buttons on the top. This remote is nearly identical to the basic LG remote from last year.

7.0 Remote App
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What it is: The features of the official phone and tablet app for the TV.
Score components: Subjectively assigned
LG UJ6300 Remote App Picture
Acts as the Remote
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What it is: Whether the remote app can emulate all the buttons of the physical remote.
:
Yes
Launches Apps and Inputs
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What it is: Whether the remote app can launch the TV's apps and change between its inputs.
:
Both
Inputs Text in YouTube
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What it is: Whether the remote app can enter text for YouTube searches.
:
No
Inputs Text in Netflix
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What it is: Whether the remote app can enter text for Netflix searches.
:
No
Streams Device Files
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What it is: Whether the remote app can stream files from the phone or tablet to the TV, files such as pictures, music and video.
:
Yes
Controls TV Settings
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What it is: Whether the app can change all or some of the settings on the TV, such as the backlight.
:
No
Voice Control
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What it is: Whether the remote can send voice commands to the TV.
:
No

TV Controls
LG UJ6300 Controls Picture

There is only a single physical button. Pressing the button brings up a menu with six icons: power, input, volume up and down, and channel up and down. A short press changes between icons and a long press selects them. This is identical functionality as the single button on many Samsung TVs.

In The Box
LG UJ6300 In The Box Picture

  • Manual
  • Batteries
  • Remote
  • Cable management strap

Misc
Power Consumption : 35 W
Power Consumption (Max) : 68 W
Firmware : 03.50.40

Differences between Sizes and Variants

We tested the 43" (43UJ6300). For the most part, we expect our review to be valid for the 49" (49UJ6300), 55" (55UJ6300) and 65" (65UJ6300).

If someone comes across a different type of panel or if their LG UJ6300 doesn't correspond to our review, let us know and we will update the review.

Size Model UK
43" 43UJ6300 43UJ630V
49" 49UJ6300 49UJ630V
55" 55UJ6300 55UJ630V
60" N/A 60UJ630V
65" 65UJ6300 65UJ630V

Compared to other TVs

LG UJ6300 Group Shot Picture
Top left: Sony X800E (XBR43X800E). Bottom left: Samsung MU6300 (UN55MU6300). Middle: LG UJ6300 (43UJ6300). Top right: LG UJ7700 (49UJ7700). Bottom right: Vizio E Series 2017 (E65-E1).  Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The UJ6300 is a run-of-the-mill entry level "4k" TV, but it doesn't offer great value compared to the competition in faces in its price bracket. Most of the time, it isn't the best choice.

Sony X800E
43" 49" 55"

The Sony X800E 4k LED TV doesn't is a slightly more expensive IPS TV, but it is a better performer in most aspects. It doesn't have quite as good input lag, but it is still good enough for it to not be an issue. It gets brighter, has a wider viewing angle, can display a wider range of colors and has better motion. If you can afford it, it is a better choice over the LG.

Samsung MU6300
40" 43" 50" 55" 65" 75"

The Samsung MU6300 is a mid-range LED Smart TV. It has much deeper and more uniform blacks than the UJ6300 which gives it much better picture quality in a dark room. Its motion blur isn't quite as good, and it doesn't have as wide a viewing angle, but it a bit brighter. If you do not need a wide viewing angle, most people will prefer the MU6300.

LG UJ7700
49" 55" 60" 65"

The UJ7700 is a step up in LG's range of LCD TVs. It features the same RGBW pixel structure, but it is an improvement over the UJ6300 in every aspect. It gets significantly brighter and can display a wider range of colors, which is good for HDR. If you can afford it, it is worth buying over the lower end model.

Vizio E Series 2017
50" 55" 60" 65" 70" 75" 80"

The Vizio E Series 2017 is a competing entry-level 4k TV. It's smart features aren't as good, as the ones found on LG TVs, and it's viewing angle isn't as good, but it is a better overall package. Its picture quality is significantly better, which is great for movies in a dark room. It's also often found much cheaper, cementing it as a better pick over the LG UJ6300.

Conclusion
SEE PRICE
Amazon.com

6.8Mixed Usage
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What it is General purpose. The TV will be used for a variety of content and usages. Movies at night, TV shows during the day, video games from time to time, etc.
Score components:
The UJ6300 is an average TV for a mixed usage. It has passable picture quality and a decent viewing angle, but it doesn't get very bright in SDR. Input lag is amongst the lowest though.
5.9Movies
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What it is Movies in the dark. The TV will be used for watching movies in a controlled environment, directly in front, in a home theater way. Mostly only high quality content, like Blu-rays, UHD Blu-rays, streaming and a little bit of HDR.
Score components:
Subpar choice for movies in a dark room. The UJ6300's blacks are not very deep and lack uniformity, causing black letterboxes and darker scenes to often look blotchy. It also lacks a local dimming feature to help control these issues.
7.1TV Shows
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What it is TV Shows in a bright living room. The TV will be used in to watch TV shows, in a bright room during the day, from multiple viewing positions at different angles. The content watched has an average quality: cable, streaming, SD channels, etc.
Score components:
The UJ6300's TV shows performance leaves much to be desired. It isn't bright enough to be used in a bright setting, and the screen finish's handling of reflection isn't great either.
6.9Sports
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What it is Sports in a living room. The TV will be used to watch sports during the day, like football or hockey. Usually watched with a group, so from multiple viewing position.
Score components:
Decent TV for sports watching. Since picture quality is retained better than average from the side, it makes the UJ6300 quite suitable for game viewing parties with a lot of guests. The uniformity of grays and colors is also decently good. Unfortunately, it doesn't get very bright, which might be an issue for afternoon games in a bright living room.
7.5Video Games
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What it is Video games. The TV will be used to play video games, directly in front, in a controlled light environment. Usually fast games, like online FPS, where motion blur and input lag is important.
The UJ6300 provides a satisfactory experience with video games. It has low motion blur, which makes fast motion crisp and clear, and its input lag is some of the lowest available, so it feels very responsive.
5.9HDR Movies
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What it is HDR Movies and TV shows. The TV will be used to watch 4k UHD HDR content, with a wide color gamut and a high peak brightness. Either via UHD Blu-rays or HDR streaming.
Passable HDR performance. The UJ6300's brightness is a bit better in HDR than SDR, but it still isn't great. The lack of local dimming and wide color gamut limits its abilities further.
7.1HDR Gaming
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What it is HDR Gaming. The TV will be used to play HDR video games using consoles that support it or on current generation gaming PCs. Xbox One S, PS4 Pro, GTX 10 series and AMD RX series graphics cards.
Good HDR gaming performance. While the HDR effect isn't very strong, the input lag and overall gaming experience remain good even in HDR.
7.4PC Monitor
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What it is PC Monitor. The TV will be used as a PC monitor, from 2-3 feet away, either for productivity purposes or gaming. Sharp text is important, as well as a high resolution.
Decent PC monitor. The UJ6300 has very low input lag and motion blur, so desktop use is responsive and isn't distracting. The viewing angle is also wide enough for use from up close. However, it cannot get very bright and its RGBW pixel structure can cause fine items on-screen to not look very sharp.
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Questions & Answers

4 ANSWERED QUESTIONS
6
Can we just stop referring to RGBW panels as 4k, or even "4k"? They're not UHD, and LG doesn't need to be encouraged by anyone lumping these hunks of trash in with real UHD TVs.
They are still legally 4k panels, even if their color resolution isn't 4k. It's similar to how all 4k Blu-rays use 4:2:0 color subsampling, so their color resolution is only a quarter of 4k, yet they are still considered 4k because the human eye is far more sensitive to black and white resolution than to color.
2
I had the lb6300 from years back. Horrible tv. In my opinion, IPS shouldn't be used for TVs. The gray-blacks were terrible, and clouding everywhere. Back then LG had a mode to make the blacks look better at the expense of crushing all shadow detail. Hopefully LG eventually switches to VA panels. Their OLED is amazing but LCD TVs are just bad.
They generally indeed have worse picture quality, but it isn't very noticeable in a brighter environment. If it's used mostly in the day time or in a lit up room, then a good IPS TV will often be even better suited than a VA type LCD TV.
1
So what's the input lag for 4k @ 60 Hz + HDR outside of game mode? Like can I play in vivid rather than game mode and still have decent input lag? Currently used to 22ms.
The input lag for 4k @ 60 Hz + HDR in Vivid is 62.6, which is quite high for intensive gaming. It will be noticeably worse than 22 ms. If you are concerned about HDR Game mode's low brightness but still want good input lag, enable 'Dynamic Contrast' or play in SDR.
0
I noticed your overall rating scores for the LG UJ6300 are lower than the scores you posted for the LG UH6150. From my research the UJ6300 is the newer replacement model of the UH6150 and the UJ6300 is supposed to have a few improvements over the UH6150 such as Active HDR vs the UH6150's HDR Pro. Why the lower overall ratings for the UJ6300? I ask because I had the UH6150 for about a month and was happy with it, however due to a bad PCB I had to exchange it for the newer UJ6300 and for some reason the picture just doesn't seem as good as the UH6150. Strange because on paper it should have a slightly better picture or at least the same as the UH6150.
Overall picture quality is similar between the two models, with the UJ6300 having noticeably better Contrast, while being worse in other areas such as Viewing Angle and Image Retention. HDR is indeed better on the UJ6300, but not by much. The score difference can mainly be attributed to the UJ6300's worse performance for motion blur, which the UH6150 handles extremely well.
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