Reviewed on Jul 29, 2016 , Eric Bousquet

LG UH6100
TV REVIEW

Usage Ratings - Version 1.0

Test Benches: test

  • 1.2: Winter 2018
  • 1.1: Summer 2017
  • 1.0: Winter 2015
  • 0.9: Winter 2014
  • 0.8: Winter 2013
6.9
Mixed Usage
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:
Value for price beaten by
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.
: Not at the latest test bench
5.9
Movies
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:
7.3
TV Shows
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
Sports
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:
7.2
Video Games
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
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:
7.2
HDR Gaming
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.
6.8
PC Monitor
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:
This tv was replaced by the LG UJ6300

Type : LED
Resolution : "4k"
Refresh Rate : 60 Hz

The LG UH6100 is an entry level 4k TV. It includes a less accurate pixel structure (RGBW) which means that although it has the correct number of pixels, it can't produce the same level of fine detail as other 4k TVs. Despite this, the picture quality is average. Motion is handled quite well and the smart platform works well.

Test Results
Design 6.5
Picture Quality 6.7
Motion 7.3
Inputs 8.1
Sound Quality 5.7
Smart Features 8.5
Pros
  • Picture quality remains when viewed at an angle
  • Smart platform is featured and intuitive
  • Upscaling of low quality content is good
Cons
  • Uses less accurate RGBW pixel structure
  • Blacks appear gray in dark rooms
  • Uniformity is below average

Check Price

6.5

Design

Score components: Subjectively assigned
LG UH6100 Design Picture
Curved : No

The design is very similar to the LG UF6400 from last year, but with more modern narrower legs. It is a fairly bland TV, which isn't necessarily a bad thing. It feels well supported and sturdy.

Stand
LG UH6100 Stand Picture

The stand is almost as wide as the TV, and made of plastic but is quite study.

Footprint of the 43" TV stand: 8.5" x 29.3"

Back
LG UH6100 Back Picture
Wall Mount : VESA 200x200

If wall mounted, many of the inputs become inaccessible.

Borders
LG UH6100 Borders Picture
Borders : 0.67" (1.7 cm)

Borders are an average thickness, and made of plastic.

Thickness
LG UH6100 Thickness Picture
Max Thickness : 2.91" (7.4cm)

UH6100 is of an average thickness. It will stick out a bit if wall mounted.

6.7

Picture Quality

Score components:

Picture quality of the LG UH6100 4k IPS display is average. The low contrast ratio and the bad black uniformity results in worse dark scene performance, with the black appearing more gray than really black. The gray uniformity is also problematic with this TV. The advantage of the IPS panel is that the picture quality remains similar when watched at an angle. Upscaling of low quality content such as DVDs or cable is very good.

6.1 Contrast
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 UH6100 Checkerboard Picture
Native Contrast
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
:
1090 : 1

The contrast ratio is average for the UH6100. The blacks are not very deep but that is not the worse that we have seen for an IPS panel. This is going to be a problem if you always watch TV in a dark room, but for a well light room, it shouldn't be a problem.

0 Local Dimming
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
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
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

Update:There are reports of a local dimming feature appearing temporarily in the menus, this is a bug and will most likely be fixed soon. We were not able to reproduce it.

7.0 SDR Peak Brightness
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
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.
:
249 cd/m2
SDR Peak 2% Window
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
:
264 cd/m2
SDR Peak 10% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
265 cd/m2
SDR Peak 25% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
266 cd/m2
SDR Peak 50% Window
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
:
266 cd/m2
SDR Peak 100% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
266 cd/m2
SDR Sustained 2% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
264 cd/m2
SDR Sustained 10% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
265 cd/m2
SDR Sustained 25% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
266 cd/m2
SDR Sustained 50% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
266 cd/m2
SDR Sustained 100% Window
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: > 400 cd/m2
Noticeable difference: 100 cd/m2
:
266 cd/m2

The SDR peak brightness is bad and is about 100 cd/m² less than what the TV can reach when in HDR mode, which is not very bright, especially when set in a bright room.

7.6 HDR Peak Brightness
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
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.
:
374 cd/m2
HDR Peak 2% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
404 cd/m2
HDR Peak 10% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
401 cd/m2
HDR Peak 25% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
400 cd/m2
HDR Peak 50% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
399 cd/m2
HDR Peak 100% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
398 cd/m2
HDR Sustained 2% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
404 cd/m2
HDR Sustained 10% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
401 cd/m2
HDR Sustained 25% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
400 cd/m2
HDR Sustained 50% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
399 cd/m2
HDR Sustained 100% Window
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: > 1000 cd/m2
Noticeable difference: 100 cd/m2
:
398 cd/m2

When sending an HDR signal, the overall peak brightness is average but quite good for a mid-range TV. It has around the same brightness as the Samsung KU6300. At around 400 cd/m² it is still decent for highlights bigger than 50% and is bright enough to watch in a bright room without problems, but it won't make HDR look as good as on higher end TVs that can get small highlights more bright.

5.6 Gray Uniformity
What it is: Evenness of colors onscreen (not just gray).
When it matters: Solid colors. Sports, panning shots.
Score components:
LG UH6100 50% Uniformity Picture
50% Std. Dev.
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%
:
6.372 %
50% DSE
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%
:
0.237 %

The gray uniformity is pretty bad for a LED TV. You can see on our test picture that the corners are a lot darker and there is also half of the screen that has a bit of a pink hue. This will result in a dirty screen effect when watching some content like sport, where you often have big panning shots or in video games where the background is a uniform color. Note that the gray uniformity issues are more obvious when you watch the TV from the side.

6.2 Viewing Angle
What it is: Color accuracy when viewed from the side.
When it matters: Large living rooms with multiple viewing positions.
Score components:
LCD Type
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
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°
:
23 °
Brightness
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°
:
28 °
Black Level
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 viewing angle is above average, but not the best we have seen for an IPS panel. When viewed from the side, the color tends to remain the same, but loses intensity.

Update: We have changed the methodology of testing. Since this is an old TV which we don't have anymore, we extrapolated the results.

4.3 Black Uniformity
What it is: Evenness of blacks.
When it matters: Dark scenes viewed in a dark room.
Score components:
LG UH6100 Native Black Uniformity Picture
Native Std. Dev.
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.
:
3.611 %

The black uniformity is really bad for the LG UH6100. There is some major clouding leaving only the side of the screen really black. This is one of the worst TVs we have tested for the black uniformity yet in 2016.

9.0 Gradient
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 UH6100 Gradient Picture
Color Depth
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 color gradient is pretty good for an 8 bit panel. There are not any banding issues that we can see from our gradient pattern. The only little imperfections that you can see when looking at the picture are more related to the gray uniformity.

Update 09/30/2016: Our original test was showing an incorrect color depth of 8 bit due to some incorrect drivers on our system, but after some correction to our test apparatus, we tested again the color depth and we can confirm that the LG UH6100 does in fact have an 10 bit panel.

7.9 Pre Calibration
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 UH6100 Pre Calibration Picture LG UH6100 Pre Gamma Curve Picture LG UH6100 Pre Color Picture
White Balance dE
What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all video.
Good value: < 3
Noticeable difference: 1
:
3.72
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
3.698
Gamma
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
:
2.02

Prior to calibration, the colors and the white balance aren't perfect but performance is good enough for most people.

9.5 Post Calibration
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 UH6100 Post Calibration Picture LG UH6100 Post Gamma Curve Picture LG UH6100 Post Color Picture
White Balance dE
What it is: Average inaccuracy of shades of gray.
When it matters: Overall color temperature of all videos.
Good value: < 3
Noticeable difference: 1
:
0.7
Color dE
What it is: Average inaccuracy of colors.
When it matters: All colors.
Good value: < 3
Noticeable difference: 1
:
1.2696
Gamma
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 2 and 20 point calibrations make it easy to fix inaccuracies. The result is quite good. You can find our calibration settings here.

8.0 480p Input
What it is: Quality of a 480p input.
When it matters: Standard definition TV, DVDs.
Score components: Subjectively assigned
LG UH6100 480p Picture

Upscaled DVDs or other 480p content looks very good on the UH6100. The image looks sharp and not too much detail is lost.

8.0 720p Input
What it is: Quality of a 720p input.
When it matters: HD channels, some streaming videos.
Score components: Subjectively assigned
LG UH6100 720p Picture

Cable TV or high quality streaming content also looks very good once upscaled. You can still make out a lot of small details.

9.0 1080p Input
What it is: Quality of a 1080p input.
When it matters: Blu-rays, streaming video, video files, video games.
Score components: Subjectively assigned
LG UH6100 1080p Picture

Blu-rays and 1080p video look very sharp and no problem at all can be noticed.

8.0 4k Input
What it is: Quality of a 4k UHD input.
When it matters: Streaming video, UHD Blu-rays, some PCs.
Score components: Subjectively assigned
LG UH6100 4k Picture

Uses less accurate RGBW pixel substructure. This is not an issue from further away, but from close up text may look strange. An example is shown here.

6.9 Color Gamut
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
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 UH6100 Color Gamut DCI-P3 Picture
DCI P3 xy
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%
:
75.7258 %
DCI P3 uv
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%
:
88.9124 %
Rec 2020 xy
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%
:
54.3282 %
Rec 2020 uv
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%
:
58.1349 %

Although there is an option to enable an 'Extended' color gamut, it is only enough for rec 709 content. Even though it accepts a HDR signal, the colors will not benefit from it.

4.3 Color Volume
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 UH6100 P3 Color Volume Picture
Normalized DCI P3 Coverage
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 %
:
44.502 %
10,000 cd/m² DCI P3 Coverage
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.
:
27.665 %
LG UH6100 2020 Color Volume Picture
Normalized Rec 2020 Coverage
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 %
:
32.948 %
10,000 cd/m² Rec 2020 Coverage
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.
:
20.250 %

The UH6100 can’t produce saturated colors to improve HDR content. At low luminosities the range of colors is poor.

4.0 Image Retention
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 UH6100 Image Retention Picture
IR after 0 min recovery
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%
:
1.094 %
IR after 2 min recovery
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%
:
0.233 %
IR after 4 min recovery
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%
:
0.070 %
IR after 6 min recovery
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%
:
0.000 %
IR after 8 min recovery
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%
:
0.000 %
IR after 10 min recovery
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%
:
0.000 %

7.5 Reflections
What it is: How much light is reflected by the TV.
When it matters: Bright rooms.
Score components: Subjectively assigned
LG UH6100 Reflections Picture LG UH6100 Bright Room Picture
Reflection
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
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 semi-gloss finish helps to diffuse reflections. Deals quite well with reflections in an average lit room, but very bright glare may be an issue.

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

This TV doesn't support 3D.

Pixels
LG UH6100 Pixels Picture

Uses the less accurate RGBW 4k panel. This replaces some of the sub pixels with a white pixel.

7.3

Motion

The UH6100 provides good performance with motion. It features a 60Hz panel which can interpolate 30 fps content, for those who like the soap opera effect. Motion blur is also great, with only a short trail following moving objects. Movies played over a blu-ray player experience no judder.

8.0 Motion Blur
What it is: Amount of blur on fast movement.
When it matters: Sports, video games.
Score components:
LG UH6100 Motion Blur Picture LG UH6100 Response Time Chart
Response Time
What it is: How quickly pixels can change color.
When it matters: Fast movement.
Good value: < 20ms
Noticeable difference: 10ms
:
17.0 ms
Overshoot
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
:
0.0 ms

The response time is great. Due to the flickering backlight, a few faint images can be seen following the logo. This should not be a problem.

2.8 Image Flicker
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 UH6100 Backlight Picture
PWM Dimming Frequency
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
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
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
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
What it is: Whether 24p content can play without any judder.
When it matters: Only 24p content (mostly just movies).
Judder-free 24p
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
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
What it is: Judder-free movies over 60i signal.
When it matters: Movies from cable/satellite boxes.
:
No

24p content as movies from Blu-rays, DVDs and from streaming apps like Netflix will play without judder with the 'Realcinema' option turned-on. Movies playing on a cable/satellite box do have some judder issues, but this is not noticeable to most people. Even with the 'TruMotion' option set to 'User' and with 'De-Judder' set to max (introducing the soap opera effect), judder was still present.

5.0 Motion Interpolation
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)
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 UH6100 Motion Interpolation (30 fps) Picture
Motion Interpolation (60 fps)
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 UH6100 has a 60Hz panel, and so can only interpolate up to 30Hz content. To do this, set 'Trumotion' to 'User' and increase the 'De-Judder' slider. This does not completely remove judder, however.

8.1

Inputs

Score components:

The input lag is quite low, which should good for most people. The UH6100 supports a wide range of resolutions, and displays clear text due to chroma support. There is a good range of inputs, but unfortunately most of them are hard to access if wall mounted.

8.1 Input Lag
What it is: Delay between input and onscreen reaction.
When it matters: Video games; when TV is used as PC monitor.
1080p @ 60Hz
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
:
18.4 ms
1080p With Interpolation
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
:
78.0 ms
1080p @ 60Hz Outside Game Mode
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
:
81.0 ms
1080p @ 60Hz @ 4:4:4
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
:
78.0 ms
4k @ 60Hz
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
:
18.7 ms
4k @ 60Hz @ 4:4:4
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
:
67.0 ms
4k @ 60Hz + HDR
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
:
18.8 ms

1080p input lag is quite good for the LG UH6100. For casual gamers out there, with only 39.7 ms of input lag, the UH6100 should be a good choice. Change the input icon to 'Game Console' and select the 'Game' picture mode for lowest input lag.

Update 01/10/2017: The UH6100 just got a new update (04.30.82) that added a new 'HDR Game' mode and it greatly upgraded the performance of this TV. Note that input lag under gamer mode with a 1080p and 4k resolution was also reduce under 20ms.

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

Change the input icon to 'PC' to enable chroma 4:4:4. With this enabled, input lag is 71.9 ms. 4k @ 60Hz requires 'HDMI Ultra HD Deep Color' to be enabled, in 'General' settings. Text is not as clear due to the alternate pixel structure as can be seen here. This is penalized in the '4k Resolution' section of the review.

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
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
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
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
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
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
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 3)
USB 3 : No
HDCP 2.2 : Yes
CEC : Yes
MHL : No
Variable Analog Audio Out : No

5.7

Sound Quality

Score components:

Bad sound performance. Distortion is present across all volumes. Even a cheap sound bar is recommended for people that care about the 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.

6.1 Frequency Response
What it is: Sound level at different frequencies.
When it matters: For balanced sound.
Score components:
LG UH6100 Frequency Response Picture
Std. Dev. @ 70
What it is: Variance of the sound level at different frequencies.
When it matters: 70 dB.
Good value: < 4 dB
Noticeable difference: 2 dB
:
5.94 dB SPL
Std. Dev. @ 80
What it is: Variance of the sound level at different frequencies.
When it matters: 80 dB.
Good value: < 4 dB
Noticeable difference: 2 dB
:
6.05 dB SPL
Std. Dev. @ Max
What it is: Variance of the sound level at different frequencies.
When it matters: Max volume.
Good value: < 4 dB
Noticeable difference: 2 dB
:
7.91 dB SPL
Max
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
:
90.2 dB SPL
Low-end Cutoff
What it is: How low of a frequency at which the bass starts.
When it matters: Movies; gaming.
Good value: < 50Hz
Noticeable difference: 10Hz
:
89.80 Hz

Average performance. The frequency response is below average, and there will be pumping and compression present at louder volumes. However, the maximum loudness and low-end cut off are quite decent for a TV.

5.0 Total Harmonic Distortion
What it is: Pureness of a single frequency.
Score components:
LG UH6100 Total Harmonic Distortion Picture
Distortion @ 70
What it is: Amount of distortion.
When it matters: 70 dB.
Good value: < 0.100
Noticeable difference: 0.100
:
0.032
Distortion @ 80
What it is: Amount of distortion.
When it matters: 80 dB.
Good value: < 0.100
Noticeable difference: 0.100
:
0.210
Distortion @ Max
What it is: Amount of distortion.
When it matters: 85 dB.
Good value: < 0.100
Noticeable difference: 0.100
:
0.214

Poor harmonic distortion performance. Although there is not a dramatic jump in distortion as the volume is increased, the overall amount of harmonic distortion is elevated at all levels.

8.5

Smart Features

Score components: Subjectively assigned
LG UH6100 Smart TV Picture
Smart OS : WebOS 3.0

The WebOS Smart interface is one of the best you can find on Smart TVs and the iteration on the LG UH6100 is very good. The interface looks great and is easy to navigate, with plenty of content and apps to chose from. The interface feels fast and without hiccups. From the smart platform, you can easily switch from live TV to any connected device like your computer, Blu-ray player or even browse your pictures and videos collection on a USB flash drive.

Apps
LG UH6100 Apps Picture

WebOS 3.0 might not have as many apps as other smart OS, like Android TV OS, but all the most popular apps are available, including YouTube, Netflix and Amazon Video. In general, WebOS apps offer a good stability.

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

TV Controls
LG UH6100 Controls Picture

Controls are located below the logo on the front of the TV. This is easy to access when wall mounted.

Remote
LG UH6100 Remote Picture
Remote : Basic

There is a basic remote supplied, which is straightforward to use. It is the same remote as many other mid-range LG TVs such as the LG LH5750.

In The Box
LG UH6100 In The Box Picture

  • Remote
  • Batteries
  • Cable management strap
  • Manual

Misc
Power Consumption : 33 W
Power Consumption (Max) : 70 W
Firmware : 03.20.25

Differences between Sizes and Variants

We tested the 43" (43UH6100). For the most part, we expect our review to be valid for the 49" (49UH6100).

If someone comes across a different type of panel or if their LG UH6100 doesn't correspond to our review, let us know and we will update the review.

Size Model Warehouse
43" 43UH6100 43UH610A
49" 49UH6100 49UH610A

Compared to other TVs

LG UH6100 Group Shot Picture
Top left: TCL US5800 (55US5800). Bottom left: Vizio D Series 4k 2016 (D50u-D1). Middle: LG UH6100 (43UH6100). Top right: Samsung KU6300 (UN55KU6300). Bottom right: TCL FS3800 (40FS3800).  Unlike our other photographs, this picture wasn't taken under a controlled environment, so do not draw conclusions from it.

The LG UH6100 offers an average picture quality, but at a low price. For watching TV shows in a bright room it may be a good pick, but for most people the recommendations below provide better performance.

TCL US5800
55" 65"

The TCL US5800 offers a similar overall picture quality, but is only offered in larger sizes. Due to the different panel type, it offers a better experience watching movies in a dark room from directly in front. For bright rooms or those with a wide viewing area, the LG UH6100 is a better pick.

LG UF6400
43" 49"

The LG UF6400 is a 2015 TV with very similar styling and performance to the LG UH6100. They provide very similar picture quality, but the LG UF6400 doesn't get as bright with HDR content and doesn't deal as well with reflections. Go for whichever one is cheaper.

Samsung KU6300
40" 43" 50" 55" 60" 65" 70"

The Samsung KU6300 is available at a slightly higher price, with a wide range of sizes. It offers a better picture quality in a dark room with deep blacks, and also has the same peak brightness of the LG UH6100 for dealing with a brighter environment. The picture quality does degrade more rapidly from the side. For those watching from a wide angle in a bright room go with the LG UH6100, otherwise the Samsung KU6300 is worth the extra money.

Vizio D Series 4k 2016
40" 50" 55" 58" 65"

The Vizio D Series 4k 2016 is another entry level 4k TV, with above average overall performance. When viewed from in front, it offers better picture quality than the LG UH6100 but this diminishes quickly from a slight angle. When watching HDR content it also can't get as bright. The upscaling is sub-par and the smart interface isn't as refined. For watching directly in front in a dark room, go with the Vizio D Series 4k 2016. For a bright living room, go with the LG UH6100.

Conclusion
SEE PRICE
Amazon.com

6.9Mixed Usage
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:
Average TV for a range of usage. Performs much better in a bright room, where reflections are dealt with well and dark scene issues are less obvious. Picture quality is average, even when viewed at an angle.
5.9Movies
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:
Bad in a dark room. Picture quality is average, and blacks appear gray. Uniformity issues are more obvious. No local dimming features.
7.3TV Shows
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:
Above average for watching TV in a bright living room. Picture quality is average even when viewed from the side. When watching non-HDR content the screen doesn't get bright enough to effectively deal with glare. Smart interface is great for casual watching or viewing pictures, and upscaling of low quality TV is great.
7.1Sports
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:
Good sports performance. Picture quality is average, even when viewed at an angle. Little motion blur, which is good. Some issues with the uniformity but only a little bit of the dirty screen effect is present.
7.2Video Games
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:
Good for video games. Picture quality is average. Motion blur and input lag are good, and should not be an issue for most people.
6.9HDR Movies
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:
Even if the LG UH6100 supports HDR10, it is missing the wide color gamut, the high peak brightness and the local dimming. The overall picture quality is average, but the lack of features results in an average HDR performance. When watching in a dark room, the blacks appear gray.
7.2HDR Gaming
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.
Supports HDR10 format, but is unable to benefit due to lack of wide color gamut and low peak brightness. Picture quality is average, but blacks look gray.
6.8PC Monitor
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:
Works well as a PC monitor. Picture quality is average, but chroma 4:4:4 support means text appears clear. Due to the pixel structure, some straight lines appear jagged as can be seen here. Response time and motion blur is low which is good.

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