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 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.
The TV is fairly cool. There are a few warm spots along the back but they are barely warm to the touch.
Decent build quality on the LG UK6300. Nothing stands out as exceptionally good, but there is nothing worrisome either.
The 2018 LG UK6300 LED TV has decent picture quality. It has a limited native contrast ratio and poor black screen uniformity, so true dark room viewing is not the greatest. It has great reflection handling, but the limited brightness means it can't effectively overcome glare in a very bright room. It has decent gray uniformity and a wide viewing angle, great for sports lovers who like to have friends over for the big game. Out of the box color accuracy isn't great, and the most accurate picture mode Expert (Dark Room) is also the dimmest. The less accurate RGBW pixel structure causes some artifacts, this is especially noticeable when used as a PC monitor.
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 LG UK6300 has decent motion handling. It has a good pixel response time, which helps reduce motion trail. The 120 Hz backlight uses PWM to adjust the intensity, which causes flicker, and there is no option to reduce the flicker frequency. It can interpolate low frame rate content, but since it is only a 60 Hz panel it can't interpolate frames that are already 60 Hz. It is judder-free when playing native 24p content, but when playing 24 fps content through a cable box at 60p or 60i, there is judder.
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.
The LG UK6300 supports most common input resolutions without issue. Game mode is able to effectively bypass almost all processing by the TV, and it has exceptionally low input lag across all resolutions as long as game mode is used. With interpolation enabled or outside of game mode the input lag is very high.
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.
There is a single shared component/composite input on the back of the TV.
The LG UK6300 has a mediocre sound. This TV doesn't get very loud and doesn't have a lot of bass either, but it produces clear dialogs and has a decent distortion performance. For a better sound, a dedicated speaker setup or soundbars are recommended.