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    Table of Contents
  1. Intro
  2. Design
    1. Stand
    2. Borders
    3. Thickness
  3. Picture Quality
    1. Contrast
    2. Local Dimming
    3. SDR Peak Brightness
    4. Gray Uniformity
    5. Viewing Angle
    6. Black Uniformity
    7. Pre Calibration
    8. Post Calibration
    9. 480p Input
    10. 720p Input
    11. 1080p Input
    12. 4k Input
    13. Color Gamut
    14. Reflections
    15. 3D
    16. 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. Total Harmonic Distortion
  7. Smart Features
    1. Ads
    2. Remote
    3. Misc
  8. Conclusion
  9. Q&A
Reviewed on Oct 02, 2015

LG UF6800
TV REVIEW

Usage Ratings
Version 1.0
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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.
Value for price
beaten by
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What it is: Product with the best value in this price range
Other best choice in a cheaper price range
Other best choice in a pricier price range
Automatically updated 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:
6.6 Not at latest test bench
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:
6.1
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:
7.0
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:
7.0
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.
Score components:
6.9
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.
Score components:
5.9
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.
4.2
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.
Score components:
6.6
Type : LED
Resolution : "4k"
Refresh Rate : 60 Hz

The LG UF6800 UHD TV uses a less accurate 4k pixel structure known as RGBW. While it does have the correct number of pixels, it is missing some colored sub-pixels. Most people won't see the difference, though. Apart from this issue, it is an average LG LED TV.

Test Results
Design 8.5
Picture Quality 6.7
Motion 6.9
Inputs 6.1
Sound Quality 6.0
Smart Features 9.0
Pros
  • Good color accuracy when viewed from the side.
Cons
  • Uses the less accurate RGBW 4k structure. It does have the correct number of pixels, but some are missing color sub-pixels. This is not really noticeable, though, under normal circumstances.
  • Poor contrast ratio.
  • A lot of reflection.

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8.5

Design

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Score components: Subjectively assigned
LG UF6800 Design Picture
Curved : No

The LG UF6800 LED TV looks like most other LG TVs of 2015. It has a wide stand, which could be a limitation if you have a small table.

Stand
LG UF6800 Stand Picture

55" Stand Dimensions: 37" by 9".

Borders
LG UF6800 Borders Picture
Borders : 0.63" (1.6 cm)

Thickness
LG UF6800 Thickness Picture
Max Thickness : 1.38" (3.5 cm)

6.7

Picture Quality

It isn't very good for watching movies, especially in a dark room. The blacks are really poor, so the picture will look washed-out and not very uniform. At least it is able to play Blu-ray movies without any judder.

5.4 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:
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
:
712 : 1

The LG UF6800 has an IPS panel, like most other LG TVs. The contrast ratio is low, and in line with most other IPS TVs.

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

5.4 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 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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
178 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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
178 cd/m2

6.8 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 UF6800 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%
:
3.862 %
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%
:
0.204 %

The gray uniformity is average. The edges are darker, and you can see a few horizontal whiter bands on the screen, but nothing outrageous.

6.7 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
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°
:
26 °
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°
:
39 °
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 °

The best thing about this TV is its color accuracy at an angle, due to its IPS panel. Note that while the colors remain fine, the blacks don't (especially at a vertical angle).

Update 01/06/2017: We have changed the methodology of testing. Since this is an old TV which we don't have anymore, we extrapolated the results from 2016 TVs.

7.2 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 UF6800 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: < 2%
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.
:
1.994 %

For an IPS TV, the blacks are more uniform than average, but every small defect is amplified, due to the poor blacks.

7.9 Pre Calibration
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What it is: TV's color accuracy before a full calibration. Only the picture mode and backlight level were changed.
When it matters: All video on an uncalibrated TV. This represents most people's use cases.
Score components:
LG UF6800 Pre Calibration Picture LG UF6800 Pre Gamma Curve Picture LG UF6800 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
:
3.70
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
3.9474
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
:
2.29

9.7 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 UF6800 Post Calibration Picture LG UF6800 Post Gamma Curve Picture LG UF6800 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
:
0.49
Color dE
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What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
0.7421
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
:
2.2

8.0 480p Input
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What it is: Quality of a 480p input.
When it matters: Standard definition TV, DVDs.
Score components: Subjectively assigned
LG UF6800 480p Picture

DVDs looks great on this TV.

8.0 720p Input
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What it is: Quality of a 720p input.
When it matters: HD channels, some streaming videos.
Score components: Subjectively assigned
LG UF6800 720p Picture

Cable TV and other high quality streaming video looks also good.

9.0 1080p Input
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What it is: Quality of a 1080p input.
When it matters: Blu-rays, streaming video, video files, video games.
Score components: Subjectively assigned
LG UF6800 1080p Picture

Blu-rays looks very sharp once upscaled.

8.0 4k Input
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What it is: Quality of a 4k UHD input.
When it matters: Streaming video, UHD Blu-rays, some PCs.
Score components: Subjectively assigned
LG UF6800 4k Picture

There is a slight loss of detail on very sharp text on native 4k content. This isn't an issue for movies, but it is noticeable when the TV is being used as a PC monitor. More details can be found in the Q&A section of our review below.

6.6 Color Gamut
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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
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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 UF6800 Color Gamut DCI-P3 Picture
DCI P3 xy
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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%
:
73.23 %
DCI P3 uv
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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%
:
81.18 %
Rec 2020 xy
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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%
:
51.84 %
Rec 2020 uv
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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%
:
57.58 %

6.5 Reflections
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What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
LG UF6800 Reflections Picture LG UF6800 Bright Room Picture
Reflection
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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
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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

Direct reflections have a rainbow around them.
The luminosity is very limited. Also, when exposed to a lot of light, the screen has a yellow tint.

0 3D
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What it is: Optional 3D video capability on TV.
When it matters: 3D movies and videos.
Score components: Subjectively assigned
3D
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What it is: If it can display a picture in 3D.
When it matters: 3D movies & videos.
:
No
3D Type
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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

Pixels
6.9

Motion

At least, this LG TV isn't bad for sports. The motion blur trail isn't long, and while you can see some darker spots on grass fields, it is not worse than normal for an LED TV.

7.5 Motion Blur
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What it is: Amount of blur on fast movement.
When it matters: Sports, video games.
Score components:
LG UF6800 Motion Blur Picture LG UF6800 Response Time Chart
Response Time
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What it is: How quickly pixels can change color.
When it matters: Fast movement.
Good value: < 20ms
Noticeable difference: 10ms
:
19.9 ms
Overshoot
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What it is: When TV’s pixels adjust too far; how quickly they come back.
When it matters: Fast movement.
Good value: < 10ms
Noticeable difference: 10ms
:
0 ms

The motion blur is average. It shouldn't be an issue for sports, but it is not ideal for gaming.

Note: Due to the very aggressive PWM even at 100% backlight, our response time measurement is less accurate on this TV.

2.8 Image Flicker
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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 UF6800 Backlight Picture
PWM Dimming Frequency
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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)
:
120 Hz
BFI
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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
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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
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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

7.1 24p Playback
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What it is: Whether 24p content can play without any judder.
When it matters: Only 24p content (mostly just movies).
Judder-free 24p
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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
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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
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What it is: Judder-free movies over 60i signal.
When it matters: Movies from cable/satellite boxes.
:
No

It supports a 24p input signal without issues. However, if it is sent over 60p or 60i, it can't reliably do the reverse 3:2 pulldown. It is a 60Hz TV, but it also has the optional soap opera effect, which you can turn on via 'TruMotion'. That feature won't look as smooth as on a 120Hz TV, though.

5.0 Motion Interpolation
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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)
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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 UF6800 Motion Interpolation (30 fps) Picture
Motion Interpolation (60 fps)
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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

6.1

Inputs

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Score components:
5.7 Input Lag
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What it is: Delay between input and onscreen reaction.
When it matters: Video games; when TV is used as PC monitor.
1080p @ 60Hz
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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
:
60.0 ms
1080p With Interpolation
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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
:
125.3 ms
1080p @ 60Hz Outside Game Mode
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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
:
63.1 ms
1080p @ 60Hz @ 4:4:4
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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
:
60.0 ms
4k @ 60Hz + HDR
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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
:
N/A
4k @ 60Hz @ 4:4:4 + 8 bit HDR
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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

The input lag is average-high, and could cause some issues for some gamers. The good news is that, as long as you have 'TruMotion' off, it doesn't matter which mode you are in to get that input lag.

8.0 Supported Resolutions
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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
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What it is: Crisp text on 1060p @ 60 hz signal.
When it matters: PC productivity and 60 fps gaming.
:
Yes
1080p @ 120Hz
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What it is: 120 fps 1080p signal supported.
When it matters: PC gaming.
:
No
4k @ 30Hz @ 4:4:4
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What it is: Crisp text on 4k @ 30 hz signal.
When it matters: PC productivity and gaming.
:
Yes
4k @ 60Hz
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What it is: 60 fps 4k signal supported.
When it matters: PC productivity and gaming.
:
Yes
4k @ 60Hz @ 4:4:4
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What it is: Crisp text on 4k @ 60 hz signal.
When it matters: Productivity and 60 fps gaming in 4k.
:
Yes

It doesn't support gaming at 120 fps. It does display chroma 4:4:4 at 4k and 60Hz if you turn on 'HDMI Ultra Color' and label the input as PC. However, the text still won't be 100% clear because it is not a 'full' 4k TV. More details in the Q&A section.

Side Inputs
Rear Inputs
Total Inputs
HDMI : 3
USB : 1
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.
:
No
Dolby Vision
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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
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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
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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
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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
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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
ARC : Yes (HDMI 2)
USB 3 : No
HDCP 2.2 : Yes
CEC : Yes
MHL : No
Variable Analog Audio Out : No

6.0

Sound Quality

Note: Sound Quality test for TVs reviewed before 2017 was performed at 75dB, 85dB, and Max SPL. Starting 2017, the target SPL levels have been changed to 70dB, 80dB, and Max dB SPL.

5.4 Frequency Response
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What it is: Sound level at different frequencies.
When it matters: For balanced sound.
Score components:
LG UF6800 Frequency Response Picture
Std. Dev. @ 70
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What it is: Variance of the sound level at different frequencies.
When it matters: 70 dB.
Good value: < 4 dB
Noticeable difference: 2 dB
:
6.79 dB SPL
Std. Dev. @ 80
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What it is: Variance of the sound level at different frequencies.
When it matters: 80 dB.
Good value: < 4 dB
Noticeable difference: 2 dB
:
7.13 dB SPL
Std. Dev. @ Max
Show Help
What it is: Variance of the sound level at different frequencies.
When it matters: Max volume.
Good value: < 4 dB
Noticeable difference: 2 dB
:
8.59 dB SPL
Max
Show Help
What it is: Max volume on the TV at a distance of 1 meter.
When it matters: For listening to loud audio.
Good value: > 90 dB
Noticeable difference: 2 dB
:
85.9 dB SPL
Low-end Cutoff
Show Help
What it is: How low of a frequency at which the bass starts.
When it matters: Movies; gaming.
Good value: < 50Hz
Noticeable difference: 10Hz
:
89 Hz

Decent low-end for a TV, but the frequency response and loudness are poor. Pumping may also be present under heavy load.

7.1 Total Harmonic Distortion
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What it is: Pureness of a single frequency.
Score components:
LG UF6800 Total Harmonic Distortion Picture
Distortion @ 70
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What it is: Amount of distortion.
When it matters: 70 dB.
Good value: < 0.100
Noticeable difference: 0.100
:
0.025
Distortion @ 80
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What it is: Amount of distortion.
When it matters: 80 dB.
Good value: < 0.100
Noticeable difference: 0.100
:
0.021
Distortion @ Max
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What it is: Amount of distortion.
When it matters: 85 dB.
Good value: < 0.100
Noticeable difference: 0.100
:
0.023

Good and even distortion results across all volumes, but the TV doesn't get loud.

9.0

Smart Features

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Score components: Subjectively assigned
LG UF6800 Smart TV Picture
Smart OS : WebOS

This LG is a smart TV, and it comes with the latest WebOS, which is great. It only has a very basic remote, though, so it is not as easy to navigate as on the other LG TVs. It also has a more limited number of inputs.

You can read our overview of LG's WebOS here.

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:
Ad-free
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What it is: The TV's ability to provide an ad-free experience.
When it matters: When using the smart features.
:
No
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

Remote
LG UF6800 Remote Picture
Remote : Smart

Misc
Power Consumption : 51 W
Power Consumption (Max) : 66 W
Firmware : 04.20.08

Conclusion
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For most people, the fact that the LG UF6800 is using the less accurate 4k panel structure RGBW won't be a big deal. It is hard to tell the difference when watching normal content, even when sitting close. The bigger issues are the average-high input lag (for gaming), the poor contrast (for movies in a dark room) and the significant amount of reflection (in a bright room). At leas, it is able to maintain good color saturation off-axis.

Usage Ratings - Version 1.0
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Test Benches:

  • 1.1: Summer 2017
  • 1.0: Winter 2015
  • 0.9: Winter 2014
  • 0.8: Winter 2013
6.6Mixed 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:
6.1Movies
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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:
7.0TV 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:
7.0Sports
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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:
6.9Video 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.
Score components:
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.
Score components:
4.2HDR 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.
6.6PC 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.
Score components:
Questions Found an error?

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Questions & Answers

7 ANSWERED QUESTIONS
31
Additional Review Notes

4k Resolution

The pixel substructure is really interesting on the LG UF6800. It is a 4k TV, but some pixels are white. So, (RGB, RGB, RGB, RGB) becomes (RGB, WRG, BWR, GBW), which means instead of 33% R, 33% G, 33% B, it is 25% R, 25% G, 25% B, 25% W.

The following pictures show a closeup shot when displaying a pure white screen on the UF6800 and the UF7600.

LG UF6800
White

LG uf6800 pixels

LG UF7600
White

LG uf7600 pixels

The pixel substructure is a bit more noticeable when we display a purplish white:

LG UF6800
Pale purple

LG uf6800 pixels purple

LG UF7600
Pale purple

LG UF7600 pixels purple

To show what is addressable, here is a pale purple diagonal line.

LG UF6800
Pale purple line

LG uf6800 pixels purple line

LG UF7600
Pale purple line

LG UF7600 pixels purple line

The above picture also show that there is some overlap between pixels on the UF6800. Probably to better hide the fact that some pixels are different than others.

With normal picture, though, this isn't that big of a deal:

LG UF6800

LG uf6800 4k

LG UF7600

LG uf7600 4k

It is very hard to tell the difference, even up close.

It is a bigger deal when using it as a computer monitor, because the text will look a bit strange:

LG UF6800

LG uf6800 4k

LG UF7600

LG uf7600 4k

Image Retention

Like the UF7600 that we tested, our UF6800 suffered from image retention. Even when we only left a slide up for less than a minute, the next slide will get the superposition for a few minutes. This isn't something to worry about, unless you plan on using the TV as a computer monitor where some parts of the screen will stay fixed for long period of time (in this case, the static portions could become almost permanent).

24
Are all 3 HDMI inputs of this TV capable of accepting 4k signal? Are they HDMI 2.0?
They will all accept 4k signals but only HDMI 1 is 2.0.
24
Will you review the LG 55UF6450, please!
Unfortunately, we won't be getting to that model, as we're now working at refining our tests in preparation for the 2016 TV lineup.
12
Would you buy lguf6800 or Samsung 55ju6500? They're both going for 1000.00 or do you suggest a better option..please respond I need to make a decision soon, thanks
Between the two, get the the Samsung. It has better overall picture quality and motion. If most of the content you watch are 1080p, then the Vizio M would be even better and fit in your budget.
9
Ok, what is the reasoning/purpose behind this 'odd' panel design?? Cost? I'm baffled. This isn't a 'IPS' panel deal is it? You never brought this up before. Do you know of any other set that has this design (that you haven't tested)?
Yes, it's cost, and no, it's not specifically because this is an IPS TV.
This kind of approach lets LG create a look that is similar to genuine UHD resolution (but isn't quite the same), and for cheaper. We haven't seen, or heard anything about, any other TVs like this thus far.
4
Why do manufacturers use ips panels? Better side viewing angles seems like such a non priority compared to the trade offs of deep blacks and overall contrast, yet it seems like there are more manufacturers using ips in 2015 than in the past. Does the tap test really work for ips lightly tapping the screen no surrounding flash in the panel means ips flash means va?
IPS is good in some situations. If you never watch TV with the lights dimmed, the blacks don't really matter. For example, all our PC monitors in our offices are IPS, and we wouldn't get anything other than that. LG uses often IPS panels because it is mostly their technology and it wouldn't make financial sense to buy panels from a third party.
The tap test isn't reliable. A closeup picture of the pixels works better (unless for PLS, a subtype of IPS, which have rectangle pixel shapes, which can be confused with VA).
2
Will you be reviewing the LG 43UF6430? I would love to hear your input on it, as well as your thoughts on the recommended settings.
We've reviewed the UF6400, which we expect will be about the same as the UF6430. You can find the review here, and our recommended settings here.
We are not taking any more questions for this product because we no longer have it in our lab.