The LG UJ7700 is a good, versatile "4k" UHD TV. It has good viewing angles, and its performance will please both gamers and sports watchers. It isn't as good for movies in a dark room or TV shows though, since it doesn't get that bright in SDR and its contrast and uniformity could be a lot better. Its excellent smart features make it quite versatile. It uses an alternate pixel structure (RGBW) which results in less accurate display of fine details.
- Decently bright
- Low input lag which is great for gaming
- Great smart features
- Picture quality in a dark room is below average
- Local dimming feature isn't great
The design of the UJ7700 is quite basic, but there are a couple of nice touches. The TV looks quite sleek, with accented edges and a basic stand but the design is definitely a step down from the 2016 UH7700. The stand is almost as wide as the TV, which may be an issue for those with narrow tables. The TV has an average thickness but unfortunately, some inputs out the back may be difficult to access if placed close to a wall.
The rear of the TV is similar to the 6 series LG TVs from 2016 such as the UH6500. It is reflective and attracts fingerprints. Many of the inputs face out the rear of the TV which may make them difficult to access if placed close to a wall.
The TV is warmest at the bottom of the screen, where the backlight LEDs are located. Fortunately, the largest cooling vents are along the bottom edge, so the TV only gets slightly warm to the touch.
The build quality of the UJ7700 is okay. The TV is almost completely plastic and doesn't look or feel as premium as the UH7700 from 2016.
- 11% Contrast
- 6% Local Dimming
- 6% SDR Peak Brightness
- 6% HDR Peak Brightness
- 6% Gray Uniformity
- 7% Viewing Angle
- 4% Black Uniformity
- 2% Gradient
- 4% Pre Calibration
- 1% Post Calibration
- 6% 480p Input
- 9% 720p Input
- 11% 1080p Input
- 6% 4k Input
- 4% Color Gamut
- 4% Color Volume
- 1% Image Retention
- 6% Reflections
- 1% 3D
The LG UJ7700 LED TV has an ordinary picture quality. The below average contrast ratio and the ordinary black uniformity mean that the UJ7700 won't be the best performer when set in a dark room. Blacks aren't very deep and dark scenes look a bit washed-out. When set in a bright room, the low contrast ratio isn't as noticeable, but the low peak brightness in SDR and its capacity to deal with reflections won't be enough to effectively fight direct glare. The gray uniformity could be better and dirty screen effect is visible when watching sports like hockey and football. The viewing angle is passable and would be suitable for people with a wide seating area. When it comes to HDR, the UJ7700 has a wide color gamut and good HDR peak brightness, but since the local dimming is very bad, it cannot really compete with other higher end TVs.
The native contrast ratio of the LG UJ7700 is below average for an LED TV but is comparable to other IPS TVs. When set in a dark room, the low contrast ratio makes blacks look more grayish than really black, rendering dark scenes a bill dull and washed-out. This is a bit less problematic when the TV is set in a bright room since the ambient light can make the low contrast ratio a bit less noticeable.
With local dimming turned on, the contrast ratio stays about the same and this is due to the very poor performance of this local dimming feature.
The local dimming on the LG UJ7700 is bad. The number of zones is low and each zone spans over a large vertical area. The reaction time is not the fastest we have seen and when turned on in SDR, the local dimming dims the whole screen. Looking at our test video, you can see that the smaller highlights get dimmed a lot. Looking at other aspects that are affected by the local dimming, like the contrast ratio and the black uniformity, it is clear that the implementation of this local dimming is not the best and this is common to most other edge-lit LED TVs. For this TV in particular, the local dimming might cause more harm than good if activated, so it could be a better idea to turn if off or simply set it to 'Low' if you really want to use this feature.
Okay SDR peak brightness. The TV's local dimming dims highlights in dark scenes in SDR content, as opposed to making them brighter like it does for HDR content, so we recommend disabling it. The 'Expert (Dark Room)' picture mode, while providing the most options to adjust the picture, is unfortunately quite dim. The 'Expert (Bright Room)' and 'Cinema' picture modes are also dim, but fortunately the 'Standard' and "Game" picture modes are much brighter. A plot of brightness over time in the 'Expert (Dark Room)' and 'Standard' picture modes is shown here.
If the TV appears too dim in a bright room. We recommend using the 'Standard' or 'Game' picture modes, disabling local dimming, using a 'W30' color temperature and using as many of our recommended settings as applicable.
Great HDR peak brightness, though not as bright as most high end TVs. The TV's worst case brightness is still fairly bright, and local dimming helps the TV make small highlights in dark scenes even brighter, as shown by our smaller window tests. The 2% white window is the brightest test, while on last year's UH7700 it was the dimmest, indicating very different local dimming behavior. However, we recommend disabling local dimming as on this TV it adds a lot of visible blooming. A plot of brightness over time is shown here.
The gray uniformity could be better on the LG UJ7700. Looking at the 50% gray uniformity test picture, large darker bands are visible and both sides are also darker. Watching our sports test clip during the testing, dirty screen effect is visible, and this in various sports like hockey and soccer.
Looking at the 5% gray test picture, not much stands out and the overall picture looks pretty even, which is a good thing.
The native black uniformity could be better on the UJ7700. Overall, the screen is pretty even with only a bit more clouding in the upper right region and also the top edge is a bit brighter. Note here that the test picture does look more grayish than really black, but the black uniformity test is not about the level of black but more the evenness of the black.
When the local dimming is turned on, the black uniformity is very bad, as you can see on our test picture. There is a lot of blooming near the white cross of our test image, making the center of the screen way more bright than both sides. This is why the standard deviation number is so big when compared to the native standard deviation. Since the local dimming is so bad on this TV when set to max, it will cause more issues than if it was completely turned off. In a case like this, it is often recommended to completely turn off this feature.
The LG UJ7700 can display our gradient test image very smoothly and without any banding normally seen on 8-bit TVs. Overall, only very little imperfections can be seen in the darker greens, which is very good and banding should not be too problematic on this LG TV.
Out of the box, the UJ7700 is not that accurate and home-enthusiasts may notice some inaccuracies. The white balance is on the warm side and the dE is pretty high plus the gamma is not tracking our 2.2 target very well. When it comes to the color accuracy, the accuracy is average at best with the cyan colors being the worst of the lot.
The calibration process on the LG UJ7700 was a bit longer than usual, especially while doing the white balance and even with the 20 point correction, the lower end could not be corrected completely. The gamma was flattened to track more closely to our 2.2 target, but with a small imperfection that matches the low end of the white balance.
The color space management on the UJ7700 was pretty good and the total color dE was halved, which is very good. Most of the colors, including the cyan, were tracking more closely to their targets after calibration. In the end, the calibration was worth the effort, since out of the box, it was pretty inaccurate.
You can see our recommended settings here.
Wide color gamut. Not as wide as most high end TVs but wider than last year's UH7700. In HDR content the red, blue and green primaries all fall short of their targets, especially the green, as most TVs struggle with deep greens. The TV isn't very accurate at showing the colors in the middle of the gamut, but is more accurate with DCI P3 colors.
The TV's EOTF follows the PQ curve fairly closely, but when shown our darkest grey slide with local dimming on high the TV turned the picture off completely. This shouldn't be a problem during normal usage though as this is a very extreme case. This EOTF was measured in the Cinema picture mode, the EOTF for game mode is shown here.
Sub-par color volume. The TV's RGBW pixel structure prevents it from making bright colors anywhere near as bright as it makes white. The TV's local dimming helps it darken dim colors, but its very low number of zones prevent it from darkening the center of our black-with-white-border slide, showing the poor black level of its IPS panel.
The UJ7700 does have some image retention, but it is quite minor, which is a very good result for an IPS TV since they are usually more prone to image retention. As you can see on our test picture, the retention right after the burn-in scene is really faint and after the first 2 minutes of recovery, is already gone. For this IPS TV, this is a very good score and people like gamers should not really be worried.
The UJ7700 is quite good at handling reflections. It has a semi-gloss finish which diffuses reflects across the screen, reducing their intensity. This should be fine for an average room, but may be an issue for a very bright room.
The UJ7700 does not support 3D.
The motion handling of the UJ7700 is good. It has a fast response time, resulting in only a short trail of blur following moving objects. Motion isn't as smooth as some other TVs though as the backlight flickers by default. It is not possible to increase the amount of flicker to clear up fast moving content. Those sensitive to judder may notice it when watching movies from a HTPC or cable, but most people won't notice these minor cadence issues. Unlike the UH7700, this TV has a 60Hz panel so can't produce as strong of a soap opera effect.
The response time is quite fast, so only a short trail can be seen following fast-moving objects. This is similar to the UH7700 from 2016.
The TV uses PWM at 120Hz to dim the backlight. This results in duplications following fast-moving objects, visible in the motion blur box. The backlight oscilloscope was taken in HDR mode, as the TV doesn't utilize its full brightness in SDR. 100% backlight in SDR looks like this.
The LG UJ7700 can display 24p movies without judder when they are played from 24p sources like DVD or Blu-ray players and only when the 'Real Cinema' option is turned on (Settings--> Picture options). On the other hand, the UJ7700 can't remove judder from 24p movies when they are played from 60p/60i sources like cable or satellite boxes.
The UJ7700 has a 60Hz panel and can interpolate lower frame rate content by setting 'TruMotion' to 'User' and increasing the 'De-Judder' slider. Fans of motion interpolation may be disappointed that it can't produce as strong of a soap opera effect as 120Hz TVs such as the UH7700 from 2016.
The UJ7700 supports most common input signals, including HDR, and can properly display most content. It has very low input lag that should please nearly any gamer.
Outstanding low input lag, one of the best we've tested. In the Game picture mode, or in any picture mode when the input's icon is changed to PC, the TV has an excellent input lag of ~11 ms, which should please nearly any gamer. However, when HDR content is played while the input’s icon is 'PC', the TV acts though the icon wasn’t 'PC', so the only picture mode with low input lag in HDR is Game mode.
- 20% 1080p @ 60Hz @ 4:4:4
- 20% 1080p @ 120Hz
- 20% 4k @ 30Hz @ 4:4:4
- 20% 4k @ 60Hz
- 20% 4k @ 60Hz @ 4:4:4
Most common resolutions are supported. 4k @ 60 Hz @ 4:2:2 or 4:4:4 color is only supported when 'HDMI ULTRA HD Deep Color' is enabled for that input. 4:4:4 color is only properly displayed when the input's icon is set to PC. When HDR content is played when the input's icon is set to PC, the TV acts like the icon isn't PC, making the TV unable to properly display 4:4:4 color in HDR.
Although the TV can properly display 4:4:4 color, its less accurate RGBW pixel structure produces artifacts when showing fine color detail. This is visible as jagged lines in our chroma 4:4:4 test image, shown here for the RGBW UH6500, compared to the perfect presentation of a true RGB TV such as the X750D shown here. This isn't a huge concern, but may be noticeable in some cases.
The UJ7700's sound quality is about average for a TV. It won't surprise anyone with its quality, but most content shouldn't have any issues. Like other high-end LG TVs with the 'Magic Remote', it has a room calibration feature that uses the microphone on the remote, which does make a good difference.
Decent frequency response and maximum volume. Maximum volume suffers from very strong amounts of compression. The bass extension falls a bit short as well.
The UJ7700 produces a fair amount of distortion. THD is elevated even on more reasonable levels.
The UJ7700 runs LG's webOS smart platform, which has a lot of low-level options for controlling the TV while still being easy to navigate. The remote has a few buttons that open quick menus, giving fast access to basic options, yet digging deeper into the interface reveals a lot of advanced options. When the remote is pointed at the screen, a cursor follows its movement, enabling options to be selected directly. The remote also has a microphone for voice commands. Content can be played from the TV's many native apps, cast to the TV from a smartphone or tablet, and played from a USB drive plugged into one of the TV's two USB ports.
The TV has ads in the LG Content Store and voice search results, and they cannot be opted out of.
The UJ7700 uses LG's excellent Magic Remote, which might be the best smart remote we've used. When the remote is pointed at the TV a cursor follows its movement, allowing deft users to quickly select their target. The remote's microphone is used for voice commands, which can do many things like changing settings and searching for content. At the center of the navigation pad is a scroll wheel that doubles as the select button, so the user can scroll to the option they want and quickly select it without moving their thumb.
Differences between Sizes and Variants
We tested the 49" (49UJ7700). For the most part, we expect our review to be valid for other sizes of the UJ7700.
If someone comes across a different type of panel or if their LG UJ7700 doesn't correspond to our review, let us know and we will update the review.
Compared to other TVs
The UJ7700 is a good TV, but it's in the most popular price bracket of the market, so it has a lot of competition that often offers better value.
The X800E is a very comparable 4k LED TV from Sony. They are both IPS LCD TVs with similar performance. The X800E is a fair bit brighter with standard content such as broadcast TV, but the UJ7700 is brighter in HDR. The LG also has lower input lag. They are very comparable TVs overall, so pick whichever is cheaper.
The LG UH7700 is the 2016 UHD TV that the UJ7700 replaces. Unlike the new model, it does not feature an RGBW pixel structure, but the overall performance is quite similar. If the lower light output of the UH7700 isn't an issue, then it's worth picking over the UJ7700 if it is found for cheaper.
Samsung's MU8000 LED TV is their similarly priced mid-range offering. It doesn't have the same wide viewing angles as the UJ7700, but it performs quite a bit better in a dark room. It also gets brighter, which is useful for both HDR and brighter environments to reduce the effects of reflections. Unless you'll frequently watch your TV from the side, then the MU8000 is a better buy over the LG.
The Vizio M Series 2016 is a commonly recommended mid-range TV from 2016. It features a powerful local dimming feature that greatly enhances the depth of blacks and contrasts. If placed in a darker environment, the Vizio M will offer much better picture quality than the LG UJ7700. It's a bit more limited with HDR, but most people will prefer the Vizio.