The LG UJ6300 UHD RGBW LED TV is an ordinary TV with a wider than average viewing angle. It features the best smart platform available and impressively low input lag. The out of the ordinary "RGBW" pixel structure also can cause smaller details and straight lines to lose sharpness.
- Very low input lag
- Low motion blur
- Not very bright
- Blacks aren't uniform
- Uses less accurate RGBW pixel structure
The design of the UJ6300 is very basic, and everything is made of plastic. There are no stylistic elements like the higher end UJ7700, and the TV doesn't look bad but it certainly won't be the centerpiece of any room. Some of the rear-facing inputs may be difficult to access if placed close to a wall.
The stand is almost as wide as the TV and looks similar to the UH6100 from 2016. It is made of plastic but supports the TV quite well.
Footprint of the 49" TV stand: 7.5" x 33.5"
The rear of the TV is simple, and a similar design but slightly less reflective than the UJ7700. Some of the inputs which face out the back of the TV may be difficult to access if the TV is placed close to a wall or VESA mounted.
The TV is fairly cool, only getting slightly warm along the top edge and a few places on the back. As with most TVs, there are vents on the bottom edge and a vent on the back of the TV, near the top.
- 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 UJ6300 LED TV has an average picture quality. If set in a dark room, the low contrast ratio and the poor black uniformity of the UJ6300 result in disappointing dark scenes, with blacks tending to look gray rather than actually black. When set in a bright room, those two aspects of the picture quality are a bit less problematic, since the ambient light will reduce the effect of the low contrast ratio. Even then, if the light is a bit too intense, then the below-average SDR peak brightness may not be enough to fight glare. The gray uniformity could be better, but luckily dirty screen effect is not too problematic and paired with the passable viewing angle performance, the UJ6300 could be used in a wide living room to watch sports with a large group of people. Lastly, the HDR performance could be better. It can't produce saturated colors and has an average HDR peak brightness and also lacks local dimming so HDR content doesn't stand out.
The LG UJ6300 has a passable contrast ratio for a LED TV. This low contrast ratio makes dark scenes appear washed-out and makes blacks appear more gray than really black, especially when set in a dark room. The TV fares much better when set in a bright room since the light usually makes the low contrast ratio less noticeable.
If you compare this IPS TV with other IPS TVs we have reviewed before, the UJ6300 contrast ratio of 1314:1 is actually better than most of them.
The UJ6300 does not have a local dimming feature. The video is for reference only.
Mediocre SDR peak brightness in the 'Expert (Dark Room)' picture mode. While this mode has the most accurate picture quality, it is much dimmer than the 'Standard' picture mode, as shown in this brightness plot. If you find the TV not bright enough, it's best to use the 'Standard' mode with a color temperature of 'W30' and as many of our recommended settings as applicable.
With 'Expert (Dark Room)' the TV is only bright enough for a really dark room, while with 'Standard' it is bright enough for a moderately lit room.
Decent HDR peak brightness. The brightness doesn't change depending on the content shown, as all our tests were about equal (the real scene test is measured at the edge of the screen which is dimmer). This constant brightness is a good thing, but it's still not nearly as bright as intended for HDR content. A plot of brightness over time is shown here.
If you find HDR content too dim in the 'Cinema' and 'Game' picture modes, you can enable 'Dynamic Contrast', as explained here. This won't increase the brightness of highlights but it will make most of the scene brighter, at the cost of slightly worse picture quality.
The gray uniformity of the UJ6300 could be better. The 50% standard deviation is pretty high, and this is caused mostly because of the darker edges corners, as you can see on the 50% gray uniformity test picture. Some vertical bands are slightly visible near the center, but dirty screen effect is not that much noticeable when watching content like sport, which is better than what we had on the UJ7700.
Looking at the 5% gray uniformity picture and numbers, not much stand out and these are very good results.
Mediocre viewing angle, better than almost all VA TVs but not as good as some other IPS TVs such as the UH6150. Blacks remain essentially unchanged no matter the angle, but colors shift and brightness decreases at moderate angles.
The black uniformity is disappointing. Most of the uniformity issues are due to the darker edges and corners, similarly to what affected the gray uniformity. Only the right upper corner is a bit brighter than the rest of the screen. Some vertical lines are also visible toward the right side of the screen.
The UJ6300 can display our test gradient image pretty well and without any banding problems. Some little imperfections can be seen in the dark blue and green, but those are very minor does not affect regular content.
Out of the box, the UJ6300 accuracy could be better. The white balance dE and the color dE are high enough that almost anybody could notice it, even if not an enthusiast. The white balance is on the warm side, missing mostly blue. Looking at the color accuracy, all the color are a bit off, with the blues and cyans being the one with the higher dE. Overall, the gamma curve is not very flat, but the gamma number is not that far from our 2.2 target.
The calibration process of the UJ6300 was a bit longer than usual, but this is mostly because the setting menu was affecting the measurements. This happens from time to time depending on the TV models, but in that particular case, we had to go out of the menu every time before taking some reading. Besides that, the process worked pretty well, and the high white balance dE what corrected and brought down to a negligible 0.24, which is an excellent result. As the consequence of the correction of the white balance, the gamma was flattened to track more closely our 2.2 target.
When it comes to the color accuracy, the provided color management system has proven to be quite good, even though some colors, mostly in the blue and red, were still a bit off. But even with this small error, the total color dE is now more than half what is was before calibration.
You can see our recommended settings here.
Standard color gamut, only good enough for SDR Rec. 709 content. When watching HDR content, greens will be significantly undersaturated, and blues and reds too to a lesser extent. Luckily the TV is fairly accurate at showing the colors it is able to, especially P3 colors.
In the 'Cinema' and 'Game' picture modes the TV dims HDR content significantly, as shown by their EOTFs here and here. This isn't present in 'Standard', shown here, and is alleviated in 'Cinema' and 'Game' by enabling 'Dynamic Contrast', as shown here and here.
Poor color volume. The TV's RGBW pixel structure prevents it from making bright colors nearly as bright as it can make white. Its color gamut narrows severely when showing dark colors, and its black level is not good.
The UJ6300 suffers from image retention and it is fairly easy to notice it, as is does not take a long exposure to a still image to create some retention. As you can see on our test picture, taken right after the 10 minutes burn-in scene, the image retention is very clear and easy to see. It was also easy to notice during the review process, as we had to give it some time, running normal video content to clear up the retention, before tests like the gray uniformity, since just displaying, let's say our contrast checkerboard, did induce image retention.
On the good side, the retention does not last very long, even if it is pretty strong at the beginning. As you can see from the test results, after 4 minutes of recovery time, the image retention was completely gone and the screen was back to normal.
The UJ6300 is quite good at handling reflections. The screen is semi-gloss which helps to reduce the intensity of direct reflections but does diffuse them across the screen. For a room with a couple of windows, this is not an issue, but bright glare on the screen may be a problem.
The LG UJ6300 does not support 3D.
The motion handling of the UJ6600 is good. It has a fast response time, resulting in only a short trail following fast moving objects. The backlight flickers by default, and there is, unfortunately, no option to reduce this frequency and clear up fast-paced content. Movies from a Blu-ray player or DVDs are smooth, but some minor judder is present when movies are watched from a HTPC or cable. Most people don't notice this so it isn't an issue. The TV has a 60Hz panel which is able to interpolate lower frame rate content.
The response time is good, so only a short trail can be seen following fast-moving objects. This is similar to the UJ7700.
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. Like with other LG TVs, there is no option to reduce the flicker frequency and use black frame insertion to clear up fast-paced content.
Only 24p movies playing from 24p sources like DVD and Blu-rays players are judder free. The UJ6300 can't remove judder from 24p movies playing from 60p/60i sources like cable and satellite boxes.
To be able to display 24p movies without judder when playing from 24 sources, the 'Real Cinema setting must be turned on.
The UJ6300 has a 60Hz panel and can interpolate lower frame rate content by setting 'TruMotion' to 'User' and increasing the 'De-Judder' slider. However, the UJ6300 can't produce as strong of a soap opera effect as 120Hz TVs such as the UH7700 from 2016, and cannot interpolate 60Hz content. Note that any motion interpolation will introduce artifacts, so use a small value unless you really like the soap opera effect. There are also some bugs in the interpolation which causes more stuttering than usual, especially with our full-screen pattern.
The UJ6300 supports nearly all the common input signals, including HDR, and should be able to properly display any content. It also has incredibly low input lag which should please almost any gamer.
Outstanding low input lag. When in the Game picture mode or in any picture mode, when the input's icon is set to PC, the TV's input lag is an excellent ~11 ms, which should please almost any gamer. However, only the Game picture mode has low input lag for HDR content, as when HDR content is played, when the input's icon is set to PC, the TV acts as though the icon is not PC.
- 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 of the common input resolutions are supported. 4:4:4 color is only properly displayed when the input's icon is set to PC. 4k @ 60 Hz @ 4:2:2 or 4:4:4 color can only be played when 'HDMI ULTRA HD Deep Color' is enabled for the input being used. 4:4:4 color is not properly displayed for HDR content, because when HDR content is played when the input's icon is PC the TV acts as though the input's icon wasn't PC.
Although 4:4:4 color is displayed properly, the screen's RGBW pixel structure produces artifacts when showing fine color detail, artifacts like jagged lines and missing pixels. This is shown here on our 4:4:4 test image when displayed on the RGBW UH6500. The same image displayed on an RGB TV like the Sony X750D has no such artifacts, as shown here. These artifacts aren't a huge problem but they are noticeable at times when using the TV as a PC monitor.
The UJ6300, unfortunately, doesn't sound good. Like every TV in this price range, any decent sound bar or entry-level speaker system will provide a significant upgrade to the overall experience.
Poor frequency response. The UJ6300's sound signature suffers from overexaggerated high-bass which causes it to sound very muddy and boomy. It's bass also doesn't extend very well, causing it to sound quite thin. It also doesn't get very loud.
High amounts of distortion are present across the volume range on the UJ6300. As expected, it rises somewhat linearly with the level at which it is set to.
The UJ6300 runs LG's webOS 3.5, which has a lot of advanced options while still being easy to navigate. The remote has several buttons that open quick menus to easily change common settings, yet digging deeper into the interface reveals a lot of low-level options. The included remote is unfortunately very basic and lacks the microphone and pointer features of LG's smart remote. Content can be played from the TV's many 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.
There are video ads in the LG Content Store (in the top left corner of the above picture). They cannot be removed.
The included remote lacks any smart features. Its rubber chunk buttons are more clumsy to press than the buttons on the remotes of higher end TVs. It has a large array of buttons, but fortunately, all the commonly used buttons are clustered around the navigation pad within easy reach, except the power and input buttons on the top. This remote is nearly identical to the basic LG remote from last year.
Differences between Sizes and Variants
We tested the 43" (43UJ6300). For the most part, we expect our review to be valid for the 49" (49UJ6300), 55" (55UJ6300) and 65" (65UJ6300).
If someone comes across a different type of panel or if their LG UJ6300 doesn't correspond to our review, let us know and we will update the review.
Compared to other TVs
The UJ6300 is a run-of-the-mill entry level "4k" TV, but it doesn't offer great value compared to the competition in faces in its price bracket. Most of the time, it isn't the best choice.
The Sony X800E 4k LED TV doesn't is a slightly more expensive IPS TV, but it is a better performer in most aspects. It doesn't have quite as good input lag, but it is still good enough for it to not be an issue. It gets brighter, has a wider viewing angle, can display a wider range of colors and has better motion. If you can afford it, it is a better choice over the LG.
The Samsung MU6300 is a mid-range LED Smart TV. It has much deeper and more uniform blacks than the UJ6300 which gives it much better picture quality in a dark room. Its motion blur isn't quite as good, and it doesn't have as wide a viewing angle, but it a bit brighter. If you do not need a wide viewing angle, most people will prefer the MU6300.
The UJ7700 is a step up in LG's range of LCD TVs. It features the same RGBW pixel structure, but it is an improvement over the UJ6300 in every aspect. It gets significantly brighter and can display a wider range of colors, which is good for HDR. If you can afford it, it is worth buying over the lower end model.
The Vizio E Series 2017 is a competing entry-level 4k TV. It's smart features aren't as good, as the ones found on LG TVs, and it's viewing angle isn't as good, but it is a better overall package. Its picture quality is significantly better, which is great for movies in a dark room. It's also often found much cheaper, cementing it as a better pick over the LG UJ6300.