LG UK7700 TV Review

Tested using Methodology v1.5
Reviewed Jul 03, 2018 at 11:05 am
LG UK7700 Picture
6.9
Mixed Usage
Value for price beaten by
: no price info
6.0
Movies
7.6
TV Shows
7.4
Sports
7.4
Video Games
5.8
HDR Movies
6.8
HDR Gaming
7.8
PC Monitor
Type LED
Sub-Type
IPS
Resolution 4k

The LG UK7700 is a good 4k IPS TV for a wide range of usages. It has good gray uniformity so not much dirty screen effect is noticeable when watching sports or playing video games. It also has great reflection handling for a bright room and remains accurate when viewed at an angle. The low input lag and fast response time are also great for gamers, but unfortunately, the dark scene performance is bad as blacks appear gray and blotchy.

Our Verdict

6.9 Mixed Usage

The LG UK7700 is a very good TV for mixed usage as it can handle reflections well, making it suitable for bright rooms even though the TV does not get too bright. Motion handling is decent and the TV can perform very well with video games and as a PC monitor due to its excellent low input lag.

Pros
  • Feels very responsive due to excellent input lag
  • Image remains accurate at an angle
Cons
  • Blacks are gray and blotchy in a dark room
  • Mediocre HDR support
6.0 Movies

This LG UK7700 has a mediocre performance when watching movies. In dark environments, the not so good contrast ratio does not make blacks look deep and the local dimming cannot help. The TV can display Blu-ray at 1080p and native 4k content well but its black uniformity might be an issue for some movie enthusiasts.

7.6 TV Shows

The performance of the LG UK7700 when watching TV shows is great. It has excellent reflection handling, decent SDR Peak Brightness, and ok viewing angles. When upscaling from the cable 720p input the UK7700 does a good job and the motion interpolation option can add some soap opera effect for those who like it.

7.4 Sports

The LG UK7700 is very good for watching sports. The good reflection handling and very good response time, along with decent SDR Peak Brightness, make it suitable for a relatively bright room and fast action content. The viewing angles are ok for a wide room and some sports fan might notice a little dirty screen effect on panning shots.

7.4 Video Games

The LG 65UK7700 is very good for video game playing. It has an outstanding low input lag and great response time that will keep most gamers happy. It can accept most common input signals and its motion handling is decent. Make sure you enable the Game picture mode to enjoy the low input lag.

5.8 HDR Movies

Watching HDR movies on this TV is mediocre. This is mainly due to sub-par contrast and the bad local dimming, which do not allow the TV to display deep blacks in dark environments. Although the 4k content is displayed well the HDR brightness is not enough to reveal the content as intended by the content creator.

6.8 HDR Gaming

This TV is good for playing HDR games It has very low input lag at 4k @ 60Hz + HDR, and because of its fast response time it a great choice for those who want to use it to play HDR games, although the not so good contrast will make blacks appear a little washed out and the colors will not be so vivid.

7.8 PC Monitor

This a great TV for use as a PC monitor. The very low input lag and the good response time will make the PC usage experience a good one. Also if you wish to use this TV as a PC monitor you do not have to worry about the permanent burn-in risk or temporary image retention.

  • 6.9 Mixed Usage
  • 6.0 Movies
  • 7.6 TV Shows
  • 7.4 Sports
  • 7.4 Video Games
  • 5.8 HDR Movies
  • 6.8 HDR Gaming
  • 7.8 PC Monitor
  1. Update 5/21/2020: Converted to Test Bench 1.5.
  2. Update 2/21/2020: Converted to Test Bench 1.4.
  3. Update 2/28/2019: Converted to Test Bench 1.3.

Test Results

Design
8.5
Design
Style
Curved No

The design of the LG UK7700 is good. It has a nice metallic finish. The stand is wide and supports the TV well. It is a relatively thin TV that will not protrude much if wall-mounted but you might have a hard time reaching some of the inputs that are in the back and are facing outwards. The build quality is good and should not cause any issues.

Design
Stand

The stand of the LG UK7700 is plastic and very wide. It provides good support to the TV and only little wobbling is noticeable.

The footprint of the 65" model is: 51.8" x 11.3"

Design
Back
Wall Mount VESA 300x300

The rear of the TV is plain. Some of the inputs face directly out the rear of the TV and these may be hard to reach if it is wall mounted.

There is no cable management.

Design
Borders
Borders 0.51" (1.3 cm)

The borders of the TV are thin and look nice. Even though they are plastic, they have a silver finish that makes them look more premium.

Design
Thickness
Max Thickness 2.52" (6.4 cm)

The LG 65UK7700 is not very thick. The widest part of the TV is at the base where the LEDs are hosted. As such, it will not stick out much if wall-mounted.

7.5
Design
Build Quality

The build quality of the LG UK7700 is good but has no visible gaps. It is almost entirely plastic and because of that, it does not look or feel premium.

Picture Quality
6.0
Picture Quality
Contrast
Native Contrast
1028 : 1
Contrast with local dimming
1028 : 1

The native contrast on this LG UK7700 is ok. Dark scene blacks will look a little grayish in a dark room and local dimming does not help much to improve the situation.

1.5
Picture Quality
Local Dimming
Local Dimming
Yes
Backlight
Edge

Poor local dimming performance on most scenes. It cannot make the blacks look deeper. Local dimming on the TV is implemented with a limited number of vertical zones since the TV is edge-lit. This has limitations in the effectiveness of local dimming. To compensate for that the algorithm is aggressive and dims the whole screen making the smaller highlights almost disappear. It is however less aggressive than the SJ8500. We recommend that you keep it on medium and if you think that the local dimming is not working to your liking, you can turn it off or simply set it to 'Low'.

5.6
Picture Quality
SDR Peak Brightness
SDR Real Scene Peak Brightness
221 cd/m²
SDR Peak 2% Window
252 cd/m²
SDR Peak 10% Window
259 cd/m²
SDR Peak 25% Window
252 cd/m²
SDR Peak 50% Window
249 cd/m²
SDR Peak 100% Window
248 cd/m²
SDR Sustained 2% Window
251 cd/m²
SDR Sustained 10% Window
259 cd/m²
SDR Sustained 25% Window
252 cd/m²
SDR Sustained 50% Window
249 cd/m²
SDR Sustained 100% Window
248 cd/m²
SDR ABL
0.006

Decent peak brightness, good enough for dim rooms but not enough to allow the TV to overcome glare. The TV sustains similar brightness across a number of window sizes and this is great.

5.3
Picture Quality
HDR Peak Brightness
HDR Real Scene Peak Brightness
278 cd/m²
HDR Peak 2% Window
454 cd/m²
HDR Peak 10% Window
452 cd/m²
HDR Peak 25% Window
327 cd/m²
HDR Peak 50% Window
288 cd/m²
HDR Peak 100% Window
288 cd/m²
HDR Sustained 2% Window
270 cd/m²
HDR Sustained 10% Window
285 cd/m²
HDR Sustained 25% Window
287 cd/m²
HDR Sustained 50% Window
288 cd/m²
HDR Sustained 100% Window
288 cd/m²
HDR ABL
0.004

The HDR peak brightness is mediocre. The TV boosts small highlights but the brightness is just not enough to display the creator's intention and take advantage of the HDR increased brightness range. A definite setback compared to last year's UJ7700.

7.5
Picture Quality
Gray Uniformity
50% Std. Dev.
3.306 %
50% DSE
0.181 %
5% Std. Dev.
0.445 %
5% DSE
0.102 %

The LG UK7700 has a good gray uniformity. In the 50% gray test picture, it is slightly darker on the sides and especially at the corners. The image uniformity at the center is a little better and although one can still notice minor dirty screen effect, it will not bother you much when you use the TV for sports viewing.

In the 5% image the uniformity is very good with no noticeable clouding.

6.9
Picture Quality
Viewing Angle
Color Washout
26 °
Color Shift
48 °
Brightness Loss
32 °
Black Level Raise
70 °
Gamma Shift
31 °

The LG 65UK7700 has a mediocre viewing angle. It is one of the worst IPS panels, but still better than almost all VA TVs. Blacks remain black, as you move away from the central angle but the colors shift and brightness washes out. Last year's UJ7700 had a very similar viewing angle.

5.0
Picture Quality
Black Uniformity
Native Std. Dev.
2.080 %
Std. Dev. w/ L.D.
4.475 %

The black uniformity of the LG UK7700 is poor. Clouding is scattered all over the image and there are areas where the black looks more like deep gray. When the local dimming is enabled, there is a gray stripe in the center of the screen defined by the horizontal line of the test cross. This not only reveals the local dimming capabilities of the TV, but also is causing even more black uniformity issues. This is a very similar behavior to last year's UJ7700 model.

8.5
Picture Quality
Reflections
Screen Finish
Semi-gloss
Total Reflections
3.0 %
Indirect Reflections
0.5 %
Calculated Direct Reflections
2.5 %

The TV is great at handling reflections. The semi-gloss finish diffuses reflections across the screen, reducing their intensity. This should is great as the TV can be placed both in average lit rooms and in bight ones.

6.0
Picture Quality
Pre Calibration
White Balance dE
5.52
Color dE
3.62
Gamma
2.16
Color Temperature
6497 K
Picture Mode
Expert (Dark Room)
Color Temp Setting
Warm 2
Gamma Setting
2.2

The LG UK7700 has very good out of the box color accuracy. When the picture mode is set to Expert (Dark Room), the color dE is almost at 3, so a few people might notice slight imperfections and the white balance dE is well below 3 were people might notice some inaccuracy.

The gamma is at 2.09 making shadows look slightly darker, but again only a few people will notice. The color temperature is almost on target and just slightly off to the warm side.

9.0
Picture Quality
Post Calibration
White Balance dE
0.15
Color dE
2.55
Gamma
2.19
Color Temperature
6513 K
White Balance Calibration
20 point
Color Calibration
Yes
Auto-Calibration Function
No

The post calibration color accuracy is excellent, even though it's not easy to achieve. The gamma was flattened to almost match the 2.2 target.

We were not able to completely correct the color dE even though we were able to reduce it. On the other hand, the white balance dE was almost zeroed. Finally, the color temperature stabilized more closely to the 6500K target due to the improved white balance.

You can see our recommended settings here.

8.0
Picture Quality
480p Input

Upscaling of low resolution content such as DVDs is good.

8.0
Picture Quality
720p Input

720p content including cable TV looks good. There are no obvious artifacts or softening of the image.

9.0
Picture Quality
1080p Input

1080p content looks good. The image is crisp and detailed.

10
Picture Quality
4k Input

Native 4k content is displayed well on the TV.

0
Picture Quality
8k Input
Picture Quality
Pixels
7.3
Picture Quality
Color Gamut
Wide Color Gamut
No
DCI P3 xy
80.78 %
DCI P3 uv
86.18 %
Rec 2020 xy
58.71 %
Rec 2020 uv
64.53 %

The color gamut of this TV is decent, but it fails to pass the 67% mark of the Rec. 2020 uv color space coverage for us to classify it as having a wide color gamut.

In the Cinema HDR picture mode, when the TV is sent our normal 10,000 cd/m² HDR infoframe, its EOTF massively undershoots the target PQ curve, making HDR content appear far dimmer than intended. Fortunately when the TV is sent a 1,000 cd/m² HDR infoframe, its EOTF is much brighter, though still not great. This means that some content will be shown with a fairly accurate brightness, while other content will be shown far dimmer than intended. If you find HDR content too dim, setting Dynamic Tone Mapping to On and setting Dynamic Contrast to High brightens the EOTF somewhat, as shown here with the 10,000 cd/m² HDR infoframe. The Game picture mode unfortunately shows the same EOTF dimming as Cinema.

6.4
Picture Quality
Color Volume
Normalized DCI P3 Coverage ITP
74.6 %
10,000 cd/m² DCI P3 Coverage ITP
34.6 %
Normalized Rec 2020 Coverage ITP
53.3 %
10,000 cd/m² Rec 2020 Coverage ITP
24.5 %

The color volume on this LG UK7700 is sub-par. This is mainly due to the limited color gamut, that does not allow the TV to display dark shades of colors as it fails to cover either color space well.

8.4
Picture Quality
Gradient
Color Depth
10 Bit
Red (Std. Dev.)
0.085 dE
Green (Std. Dev.)
0.099 dE
Blue (Std. Dev.)
0.078 dE
Gray (Std. Dev.)
0.120 dE

The gradient on this TV is good. There is some small banding in almost all of gray, but only faint banding elsewhere else.

10
Picture Quality
Temporary Image Retention
IR after 0 min recovery
0.00 %
IR after 2 min recovery
0.00 %
IR after 4 min recovery
0.00 %
IR after 6 min recovery
0.00 %
IR after 8 min recovery
0.00 %
IR after 10 min recovery
0.00 %

There is no image retention on this TV and this is good news for those users who might use this TV as a monitor.

10
Picture Quality
Permanent Burn-In Risk
Permanent Burn-In Risk
No

Although some IPS panels can suffer from temporary image retention, this doesn't appear to be permanent as the IPS panel in our long-term test appear immune.

Motion
7.6
Motion
Response Time
80% Response Time
6.1 ms
100% Response Time
12.8 ms

The response time is great and results in only a small trail following fast moving objects. It is an improvement over the UJ7700.

4.0
Motion
Flicker-Free
Flicker-Free
No
PWM Dimming Frequency
120 Hz

As with many 2018 models, the UK7700 uses PWM at 120Hz to dim the backlight. This causes duplications in situations of images with fast moving objects, that you can see in the blur box.

5.4
Motion
Black Frame Insertion (BFI)
Optional BFI
No
Min Flicker for 60 fps
120 Hz
60 Hz for 60 fps
No
120 Hz for 120 fps
N/A
Min Flicker for 60 fps in Game Mode
120 Hz

TheLG 65UK7700 does not have an optional BFI, but because the backlight flickers at 120Hz, it does help motion look more clear.

Motion
Motion Interpolation
Motion Interpolation (30 fps)
Yes
Motion Interpolation (60 fps)
No

Motion interpolation on the UK7700 is decent. It is nearly perfect during slow-moving shots. When at the De-judder is set to max, the TV does not stop interpolating even during fast motion, so some artifacts are present. If you find that interpolation produces too many artifacts, we recommend you lower the value of De-Judder so that motion interpolation becomes less aggressive and produces less artifacts

7.3
Motion
Stutter
Frame Hold Time @ 24 fps
28.9 ms
Frame Hold Time @ 60 fps
3.9 ms

The LG UK7700 is decent at displaying content without stutter. In low fps content such as 24p movies, you will notice some stutter as the TV response time is quite fast. If you find that bothersome, you can enable motion interpolation to reduce it.

7.8
Motion
24p Judder
Judder-Free 24p
Yes
Judder-Free 24p via 60p
No
Judder-Free 24p via 60i
No
Judder-Free 24p via Native Apps
Yes

The LG 65UK7700 can play 24p content without judder, but only when played from a native 24p source like a Blu-ray player or from the native apps. To remove judder turn on Real Cinema.

When the 24fps content is coming through 60i or 60p then the TV is not able to remove it.

0
Motion
Variable Refresh Rate
Native Refresh Rate
60 Hz
Variable Refresh Rate
No
HDMI Forum VRR
No
FreeSync
No
G-SYNC Compatible
No
4k VRR Maximum
N/A
4k VRR Minimum
No VRR support
1080p VRR Maximum
N/A
1080p VRR Minimum
No VRR support
1440p VRR Maximum
N/A
1440p VRR Minimum
No VRR support
VRR Supported Connectors
No VRR support

This TV doesn't support variable refresh rate.

Inputs
8.9
Inputs
Input Lag
1080p @ 60 Hz
12.8 ms
1080p @ 60 Hz Outside Game Mode
136.0 ms
1440p @ 60 Hz
N/A
4k @ 60 Hz
12.9 ms
4k @ 60 Hz + 10 bit HDR
14.0 ms
4k @ 60 Hz @ 4:4:4
11.6 ms
4k @ 60 Hz Outside Game Mode
134.6 ms
4k @ 60 Hz With Interpolation
134.6 ms
8k @ 60 Hz
N/A
1080p @ 120 Hz
N/A
1440p @ 120 Hz
N/A
4k @ 120 Hz
N/A
1080p with Variable Refresh Rate
N/A
1440p with VRR
N/A
4k with VRR
N/A
8k with VRR
N/A
Auto Low Latency Mode (ALLM)
No

Remarkable low input lag. When Game mode is activated, the TV bypasses all processing. This is among the best input lag we have tested up to date.

Chroma 4:4:4 is only shown properly in the PC input mode and unlike many other LG TVs, the Game picture mode is still required when in the PC input mode in order to have the lowest input lag.

7.5
Inputs
Supported Resolutions
1080p @ 60 Hz @ 4:4:4
Yes
1080p @ 120 Hz
No
1440p @ 60 Hz