The LG UK6300 is a decent RGBW IPS TV with wide viewing angles, so it remains accurate when viewed at an angle. It also has low input lag so feels responsive. Unfortunately, when viewed in a dark room, blacks appear gray due to the low native contrast ratio, but when viewed in a bright room, this isn't noticeable. The out of the ordinary "RGBW" pixel structure also can cause smaller details and straight lines to lose sharpness, especially when used as a PC monitor.
The LG UK6300 is a decent TV for mixed usage. It has decent picture quality and a passable viewing angle, but it isn't able to overcome glare in a bright room and has poor dark room performance. It has a good smart interface and extraordinarily low input lag.
Not a good choice for movie lovers. It doesn't get very bright. Blacks aren't truly black and it has poor uniformity, so letterbox bars look cloudy. Subtitles don't look good due to the lack of a local dimming feature.
The LG UK6300 is good for watching TV Shows. Low frame rate content looks great. The TV isn't bright enough to be used in a bright room as it can't overcome glare, so daytime viewing is somewhat compromised. It has a good smart interface with a wide assortment of apps available for watching streaming TV.
Decent TV for watching sports. There is some dirty screen effect visible in the center of the screen, but it shouldn't be very noticeable. It has a good viewing angle great for game day parties, although it isn't very bright which might be an issue for daytime games in a bright living room. It has a good response time, so fast-paced sports don't have much motion trail.
Good TV for video games, mainly due to the excellent low input lag when game mode is used. The TV has a good response time, so there is very little motion blur. It has decent picture quality, but some games suffer from the low contrast ratio.
Disappointing HDR Movie experience. It has a poor native contrast and no local dimming feature. It doesn't support a wide color gamut and can't produce deep dark colors. There is almost no advantage to watching in HDR on the UK6300.
Decent HDR Gaming performance. Exceptional low input lag, and the response time is good, so there is very little motion trail. The mediocre peak brightness and lack of a wide color gamut means the HDR effect is not very noticeable.
Decent PC monitor. It has excellent low input lag and a good viewing angle. The response time is good so there is little motion trail. The less accurate RGBW pixel structure means that text appears jagged as seen on the UH6500, even though the TV supports Chroma 4:4:4.
The design of the 2018 UK6300 LED TV is very basic. It is a very functional design with no serious deficiencies, but it won't be the center of attention in a room. Some of the rear-facing inputs may be difficult to access when wall mounted, and if a component connection is required it is impossible to mount the TV flush to the wall. There is no cable management.
The stand is almost the full width of the TV and is identical to the UJ6300 from last year. It is made of plastic and supports the TV well.
Footprint of the 55" TV stand: 33.3" x 8.6"
The back of the TV is very basic. There is no cable management. It is nearly identical to the UJ6300 from last year. Some of the inputs face out the back of the TV, which may be difficult to access if wall mounted.
Update 03/04/2019: The VESA mount was incorrectly listed as 400x400, it is actually 200x200 on the 43" model.
The TV is quite thick and will stick out from the wall if mounted.
Decent build quality on the LG UK6300. Nothing stands out as exceptionally good, but there is nothing worrisome either.
Mediocre native contrast ratio. Blacks are not truly black, and dark room viewing is less than ideal, especially taking into account the black uniformity results.
The contrast ratio is slightly worse than last year's UJ6300.
Note: The 50" model available in some areas has a VA panel, which we expect to have a higher native contrast ratio.
The UK6300 does not have a local dimming feature. This video is provided for reference only.
Mediocre peak real scene with the more accurate Expert (Dark Room) picture mode. There is almost no variation depending on content.
For a brighter room, the Standard picture mode with our recommended settings and a W30 color temperature is better, peak brightness is 286 cd/m². In Vivid mode with the default settings, the UK6300 is much brighter at 364 cd/m², although a lot of color accuracy is lost in that mode.
It is a bit brighter than the UJ6300, especially when the other picture modes are used.
Mediocre HDR peak brightness. The LG UK6300 is not bright enough to overcome glare in a bright room, but due to the poor black uniformity, it is not well suited to a very dark room. Like with SDR content, small highlights in some scenes do not really pop, brightness is very similar regardless of content.
Decent gray uniformity. There is some dirty screen effect near the center, but it is not too noticeable when watching sports. The edges of the LG are noticeably dimmer than the rest of the TV and there are some dark vertical bands.
Mediocre viewing angle but better than almost all VA TVs. Black levels stay accurate regardless of angle, but colors shift noticeable at moderate angles.
Note: The 50" model has a VA panel, which we expect to have a worse viewing angle.
Poor black uniformity on the UK6300. There is no local dimming feature, and there is clouding across the entire screen when displaying the test cross. The edges of the screen are darker than the rest of the TV and there are vertical bands visible throughout.
The UK6300 has good reflection handling. The semi-gloss screen diffuses direct reflections across the screen. The screen is not very effective at overcoming glare.
Mediocre color accuracy out of the box. The Expert (Dark Room) picture mode has the most accurate colors. The white balance and color balance dE are high enough that most people would notice it. The gamma curve is mostly flat, and not too far off from our 2.2 target.
Calibration was long, but very effective. White balance is almost perfect, and color dE is low enough that most people won't be able to see any inaccuracies. Gamma follows the target curve almost perfectly, and color temperature is almost perfect.
You can see our recommended settings here.
720p content including cable TV looks good. There are no obvious artifacts or softening of the image.
Standard color gamut, only good enough for SDR. See our recommended settings for the most accurate colors here.
The Expert (Dark Room) EOTF follows our curve perfectly, and the brightness rolls off gently as the TV approaches its peak brightness.
Update 06/29/2018: The DCI P3 xy and DCI P3 uv results were swapped when entering the data. This has now been fixed, and the score and performance are unchanged.
Poor color volume on the UK6300, similar to the UJ6300. The TV's RGBW structure cannot produce colors as bright as pure white. It also cannot produce very good dark colors.
There is small banding throughout our gradient test, especially in grayscale and the darker greens. Real-world tests show some banding in movies with large areas of similar colors, like the outside shots in The Martian.
The LG UK6300 suffers from image retention, and it is quite noticeable with our test image. These results are disappointing, almost as bad as last year's UJ6300. These results are among the worst image retention of any TV we have tested.
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 response time is good. There is some overshoot with the 0-20% slide which causes a much higher response time on dim scenes. There is very little motion trail.
The TV uses PWM to dim the backlight, and there is flicker at all backlight levels. This flicker helps to clear up motion a little, but results in duplications in fast moving objects.
The 'Standard' picture mode is brighter. In this mode the backlight stays on longer, as shown in this plot.
Same as the UJ6300, there is no option to reduce the flicker frequency to 60Hz.
The LG UK6300 can interpolate lower frame rate content up to 60fps. As this is a 60Hz panel, it can't interpolate 60fps content. When motion interpolation is enabled there are visible artifacts.
The LG UK6300 is good at displaying content without stutter. 24p movies have less visible stutter, especially with wide-panning shots.
Only 24p content played from a true 24p source like a Blu-ray player are judder free. The UK6300 can't remove judder from 24p sources played from a 60p/60i source like a cable box.
To play 24p movies without judder when playing from a Blu-ray player, the 'Real Cinema' setting must be enabled.
The LG 43UK6300 does not support any of the variable refresh rate technologies like Freesync.
Extraordinary low input lag, as long as the 'Game' Picture Mode is selected. For use as a PC Monitor, it is recommended to set the input label to 'PC', and use the'Game' Picture Mode for the lowest input lag possible.
Chroma 4:4:4 only works properly when the input label is set to 'PC' with RGB color; it doesn't display correctly with YCbCr.
Most of the common input resolutions are supported with issue. Like most LG TVs, the input label has to be set to 'PC' for chroma 4:4:4 support. For 4:4:4 to work properly, RGB colors must be used. The less accurate RGBW pixel structure causes artifacts when used as a PC Monitor.
For 4k 60Hz, HDMI Ultra HD Deep Color must be enabled in the Additional Settings menu for the input used.
4k HDR does not work properly when in PC mode, colors appear washed out.