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.
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.
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.
The LG UK7700 LED TV has a decent picture quality. It has low contrast ratio even for an IPS panel, poor local dimming and poor black uniformity so when viewed in a dark room it cannot deliver a great picture as dark scenes look a bit washed-out. In a bright room, as the TV cannot get very bright, it cannot fight glare but thankfully it is great at dealing with reflections. Gray uniformity is good although some dirty screen effect is noticeable in sports. The viewing angle results in a fairly accurate image when viewed at an angle which is okay for a wide room.
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'.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
There is no image retention on this TV and this is good news for those users who might use this TV as a monitor.
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.
The LG UK7700 has okay motion handling. It has a great response time so only a short trail is visible with fast-moving content. The TV flickers the backlight in order to dim the brightness at 120Hz and this can be bothersome to some people. There is no BFI option and the motion interpolation that can be used to reduce stutter can sometimes create artifacts since it does not stop when motion becomes very fast as many higher-end TVs do. Finally, the TV can remove judder only from native content and not when the 24p is coming through a 60i or 60p signal.
The response time is great and results in only a small trail following fast moving objects. It is an improvement over the UJ7700.
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
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.
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.
The LG UK7700 has a very low input lag making it good for use as a PC monitor. Although the supported resolutions do not include 1440p or 1080p at 120hz, most other common input signals, including HDR, can be properly displayed so that along with the low input lag should please even the most demanding gamers.
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.
The most common resolutions are supported on the LG UK7700. However, 1440p is not supported, although 1080p @ 120Hz is accepted by the TV, it is not displayed properly as this is a 60Hz panel and drops every second frame.
4:4:4 Chroma is only properly displayed when the input icon is set to PC mode and the signal is RGB as YCbCr will not correctly display.
When in PC Mode with HDR enabled, the TV does not properly support 4:4:4 color and colors appear washed out.
In PC Mode, Sharpness at 0 means no added sharpness.
4k @ 60Hz @ 4:4:4 or 4:2:2 is only supported when HDMI Ultra HD Deep Color is enabled
The sound of the LG UK770 is average. This TV has a decent amount of punch and body to its bass, but doesn't produce any thump or rumble as it lacks sub-bass. It is also capable of producing clear and intelligible dialogue, but gets only decently loud and may not be loud-enough for very large and noisy environments. For a better sound, soundbars or dedicated speakers are recommended.
The frequency response of the UK700 is average. LFE (low-frequency extension) is at 80Hz, which is decent. This means that this TV will have some punch to its bass, but won't be able to produce sub-bass, which is responsible for thump and rumble The response above the LFE point is quite good, which is important for producing intelligible dialogue. However, this TV gets only decently loud and produces some pumping and compression artifacts under heavy loads. Also, its room correction system (Magic Sound Tuning) wasn't able to remove the modes of our test room around 200Hz.
The distortion performance of the UK7700 is about average. The overall amount of THD produced is not very high at 80dB SPL, and there is not jump in THD under maximum volume either. However, this TV doesn't get very loud.
The LG UK7700 runs the latest version of WebOS, LG's smart operating system. It has a decent number of pre-installed apps, you can always visit the LG content store where you can choose from thousands of third-party apps. The LG content store is not as good as the Google Play Store found on Samsung or Sony TVs. The remote is the one that comes with all high-end 2018 LG models we have tested and is well built. The Smart features design works well but is not as sleek as the ones found on high-end Samsung or Sony TVs. The Smart features come equipped with new voice control functions that are very powerful. They function properly and allow it to interface with a variety of other devices like Amazon Alexa or Google Home.
The webOS interface is similar to other 2018 LG models like the SK9500. It includes the improved search functionality and the menu is very responsive.
The TV comes preloaded with many popular apps such as Netflix, YouTube and Amazon Video. In the LG Content Store, you can find many more apps and content
The remote is identical to the one found on all high-end LG TVs like the C8 and SK9500. It gives you quick access to the most common TV functions and can also be used as a pointer to navigate the menus and even has a scroll wheel integrated into the d-pad.
The remote also works for voice commands and the TV can perform basic commands such as change inputs, open YouTube, or search Netflix, but it cannot change the settings i.e 'Change backlight to 5' won't work.
You can also set a sleep timer and perform more advanced searches like checking the weather or answering basic searches. Some searches are answered by LG's proprietary ThinQ AI; others were answered by Google Assistant, similar to Sony TVs like the X900F.
The remote app can perform voice searches but does not understand voice commands like the remote.
We tested the 65" (65UK7700PUD). For the most part, we expect our review to be valid for the 49" (49UK7700) and the 55" (55UK7700).
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If someone comes across a different type of panel or if their LG UK7700 doesn't correspond to our review, let us know and we will update the review.
The LG UK7700 is a better TV than the Samsung NU7100. The LG has better reflection handling, better response time, and wider viewing angles due to its IPS panel, so watching sports and TV shows on the LG is a very good experience. On the other hand, the Samsung NU7100 will offer a better experience in HDR movies due to the much better contrast ratio that can produce deep blacks in a dark room.
The LG SK8000 and the LG UK7700 have very similar performance. The LG SK8000 can remove 24p judder from movies better than the UK7700 can and can interpolate motion to higher fps than the UK7000. Also, the black frame insertion feature of the SK800 works better than the UK7700 and can make the image crisper. The LG UK7700, on the other hand, has lower input lag both in SDR and HDR and is great for gaming.
The LG UK7700 and the Samsung RU7100 are different types of TVs, so if you have a dark room and you sit straight in front of the TV, the RU7100 is a better choice as it has deeper and more uniform blacks. If you have a room with a wide seating arrangement and many lights, then the LG UK7700 is a better choice as the image remains accurate when viewed from the side and the TV has better reflection handling.
The LG UM7300 is slightly better than the LG UK7700. The UM7300 is a bit brighter, and has better black uniformity. Unlike the UM7300, the UK7700 has a local dimming feature, but it isn't very effective anyway. The UK7700 has a slightly better design, with a full-metal back, and it has an additional HDMI input.
If you have a room with a wide seating arrangement, then the LG UK7700 is a better choice as the image remains accurate when viewed at an angle. If, however, you sit straight in front of the TV and watch movies in a dark room, then the Samsung NU8000 is a much better choice as it has a higher contrast ratio and can display deep uniform blacks, enhancing the picture quality. The Samsung NU8000 can get brighter to fight bright room glare and supports FreeSync for tear-free gaming sessions. The LG UK7700 has better reflection handling and a lower input lag, which is great for playing video games.
The LG UK7700 is better than the Sony X750F. The LG supports local dimming to improve quality of blacks and also has lower input lag, which is great if you play video games or use it as a PC monitor. The LG can handle reflections better and you can easily place it in a bright room like a kitchen without issues. On the other hand, the Sony X750F has better black frame insertion that can clear the image blur better.
The two TVs have a different panel type. The LG UK7700 has better viewing angles, better reflection handling and is more appropriate for watching sports or TV shows in a room with many light sources and wide seating arrangement. The Vizio E Series 2018, on the other hand, is a better choice for a dark room where you will be sitting right in front. It has better contrast ratio, better black uniformity, and will provide a better movie experience in a dark room and better HDR performance.
The TCL R617 is a better TV than the LG UK7700. The TCL617 has a VA-panel and can display deeper blacks and brighter highlights due to the better contrast ratio and better brightness, so you will enjoy watching movies and HDR movies more on the TCL. On the contrary, the LG UK7700 has an IPS panel and is better for watching TV shows and sports, as it can better handle the reflections of a room with many light sources, has better gray uniformity, and has wide viewing angles to accommodate for wide seating arrangements.