Reviewed on Oct 02, 2015

LG UF6800 TV REVIEW

Usage Ratings - Version 1.0
6.6
Mixed Usage
Value for price beaten by
: Not at the latest test bench
6.1
Movies
7.0
TV Shows
7.0
Sports
6.9
Video Games
5.9
HDR Movies
4.2
HDR Gaming
6.6
PC Monitor
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.

Check Price

8.5

Design

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

55" Stand Dimensions: 37" by 9".

Borders
Borders : 0.63" (1.6 cm)

Thickness
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
Native Contrast
:
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
Local Dimming
:
No
Backlight
:
Direct

5.4 SDR Peak Brightness
SDR Peak 2% Window
:
178 cd/m2
SDR Peak 50% Window
:
178 cd/m2

6.8 Gray Uniformity
50% Std. Dev.
:
3.862 %
50% DSE
:
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
LCD Type
:
IPS
Color Shift
:
26 °
Brightness
:
39 °
Black Level
:
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
Native Std. Dev.
:
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
White Balance dE
:
3.70
Color dE
:
3.9474
Gamma
:
2.29

9.7 Post Calibration
White Balance dE
:
0.49
Color dE
:
0.7421
Gamma
:
2.2

8.0 480p Input

DVDs looks great on this TV.

8.0 720p Input

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

9.0 1080p Input

Blu-rays looks very sharp once upscaled.

8.0 4k Input

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 here.

6.6 Color Gamut
Wide Color Gamut
:
No
DCI P3 xy
:
73.23 %
DCI P3 uv
:
81.18 %
Rec 2020 xy
:
51.84 %
Rec 2020 uv
:
57.58 %

6.5 Reflections
Reflection
:
1.9 %
Screen Finish
:
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
3D
:
No
3D Type
:
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
Response Time
:
19.9 ms
Overshoot
:
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
PWM Dimming Frequency
:
120 Hz
BFI
:
No
BFI Frequency
:
120 Hz
BFI In Game Mode
:
No

7.1 24p Playback
Judder-free 24p
:
Yes
Judder-free 24p via 60p
:
No
Judder-free 24p via 60i
:
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
Motion Interpolation (30 fps)
:
Yes
Motion Interpolation (60 fps)
:
No

6.1

Inputs

5.7 Input Lag
1080p @ 60Hz
:
60.0 ms
1080p With Interpolation
:
125.3 ms
1080p @ 60Hz Outside Game Mode
:
63.1 ms
1080p @ 60Hz @ 4:4:4
:
60.0 ms
4k @ 60Hz + HDR
:
N/A
4k @ 60Hz @ 4:4:4 + 8 bit HDR
:
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
1080p @ 60Hz @ 4:4:4
:
Yes
1080p @ 120Hz
:
No
4k @ 30Hz @ 4:4:4
:
Yes
4k @ 60Hz
:
Yes
4k @ 60Hz @ 4:4:4
:
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 here

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
:
No
Dolby Vision
:
No
5.1 Passthrough ARC Dolby Digital
:
Yes
5.1 Passthrough ARC DTS
:
Yes
5.1 Passthrough Optical Dolby Digital
:
Yes
5.1 Passthrough Optical DTS
:
Yes
HDMI 2.0 Full Bandwidth : 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
Std. Dev. @ 70
:
6.79 dB SPL
Std. Dev. @ 80
:
7.13 dB SPL
Std. Dev. @ Max
:
8.59 dB SPL
Max
:
85.9 dB SPL
Low-end Cutoff
:
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
Distortion @ 70
:
0.025
Distortion @ 80
:
0.021
Distortion @ Max
:
0.023

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

9.0

Smart Features

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
Ad-free
:
No
Opt-out
:
No

Remote
Remote : Smart

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

6.6 Mixed Usage

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.

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