The LG UK6570PUB is a good 4k IPS TV with wide viewing angles and outstanding low input lag, the best we've tested so far on a TV. It has excellent gradient handling and a fast response time. It has excellent reflection handling and good SDR brightness, good for daytime viewing. Unfortunately, it doesn't perform well in a dark room, since it can't produce deep blacks and has poor black uniformity. It also isn't great for HDR, as it isn't very bright in HDR and lacks a wide color gamut.
The LG UK6570PUB has a great design. The stand holds the TV well, but it does wobble a bit if nudged and the stand is nearly the full width of the TV, so you'll need a big desk if you aren't planning on VESA mounting it. The back of the TV is one large metal panel, and while it isn't loose, it doesn't seem very solid and may dent easily. The overall build quality is good, and there shouldn't be any issues with it.
The stand is nearly the full width of the TV, and requires a large table if you don't plan on wall mounting it. The top of the stand is plastic, but the main structure of the stand is made of metal.
Footprint of the 75" stand: 60.5" x 13.6"
The back of the LG 75UK6570PUB is very plain. There is a single, large metal panel covering the entire back of the TV. No thought was given to cable management, there is only a single plastic cable tie included in the box.
The borders are thicker than some similar models, including the UK7700. There is a small gap between the outer panel and the display, but this isn't really noticeable under normal viewing conditions.
The LG UK6570PUB is one of the thickest TVs we've tested. It can be placed fairly close to a wall, but due to the stand design it can't be placed flush with a wall unless VESA mounted.
There are warm bands throughout the TV, likely caused by the backlight zones. They aren't much warmer than the rest of the screen, and there shouldn't be any issues with overheating.
The LG UK6570PUB has good build quality. There are no issues with most of the TV, but the back panel is a single sheet of thin metal that may dent easily. Overall, it is very similar to the UK7700.
The LG UK6570PUB has decent picture quality. Unfortunately, dark room performance isn't great, as it has only decent contrast, mediocre black uniformity, and lacks a local dimming feature to improve black levels. HDR doesn't look as good as it should, due to sub-par HDR brightness and a lack of a wide color gamut. The image remains accurate when viewed at an angle. Most people will be very satisfied with the color accuracy and white balance out of the box, and there isn't much benefit to having it professionally calibrated. Gradients are displayed with great accuracy, and there is very little banding.
The TV has a decent contrast ratio, worse than most VA panels but above average for an IPS. Unfortunately, there is no local dimming feature to improve the contrast ratio.
Note: the 70" model has a VA panel, and will likely have a better contrast ratio.
The TV does not have a local dimming feature. The above video is provided for reference only.
The LG UK6570 has good peak brightness in SDR. The brightness hardly changes at all with different content, which is great. The real scene brightness is a bit dimmer due to the TV's uniformity.
Mediocre HDR brightness. Small highlights in some scenes aren't very bright, but large bright scenes are displayed at the TV's maximum brightness. There is some variation in brightness depending on content, which can be distracting.
If you find HDR content too dim, take a look at our recommended HDR settings.
Mediocre gray uniformity. There are bands visible throughout the screen, and noticeable dirty screen effect that is likely to bother sports fans. In near-black scenes, it is less noticeable.
The LG 75UK6570PUB has mediocre viewing angles, similar to the UK6300. The contrast stays relatively flat regardless of viewing angle, which is typical for IPS panels. Colors lose accuracy and the brightness drops at a small angle.
Note: the 70" model has a VA panel and is expected to have worse viewing angles.
The LG UK6570PUB has disappointing black uniformity. There is noticeable clouding throughout the screen, but there is no flashlighting as the TV is direct-lit.
The TV has excellent reflection handling. Direct reflections are significantly reduced in intensity, and there is no purple tint like some higher-end anti-reflective coatings.
Out of the box, the TV is one of the most accurate displays we have tested. White balance dE and color dE are very low, and the color temperature is only slightly cool. The average gamma is close to our target of 2.2, but fluctuates depending on the input, so some scenes are overly bright and some are overly dark. Most people won't feel the need to have the TV professionally calibrated.
1080p content, like from a Blu-ray player or non-4k console looks great, almost as good as native 4k content.
4k content is displayed perfectly without any issues. Unlike the UK6300, the UK6570PUB does not use the less accurate RGBW pixel structure.
The TV has a decent color gamut, but it falls short of the wide color gamut necessary for HDR content to look great.
In the 'Standard' Picture Mode, the EOTF does not follow our input stimulus, and most scenes are too dark. Unlike most TVs, we recommend setting Dynamic Contrast to 'High'. We tested the TV with this setting, as without it the TV is too dim. In PC mode, the UK6570 is even dimmer, and in Game mode it is even worse.
If you find HDR content too dim, setting the Backlight to '100' with Dynamic Tone Mapping enabled and Dynamic Contrast on 'High' improves the EOTF, and it almost follows the input stimulus perfectly.
The TV has mediocre color volume. In the P3 color space, it can't produce bright saturated colors. In Rec 2020, it can't fill out the entire gamut and overly saturated colors aren't very bright.
Excellent gradient handling. There is very little banding in areas of similar color.
There is no temporary image retention, which is great.
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 UK6570PUB has decent motion handling. It has a fast response time that produces little motion blur, which is great. Unfortunately, it uses PWM to dim the backlight, and there is 120 Hz flicker at all brightness levels, which results in some duplications in motion. There is no option to adjust the flicker frequency. It has a decent motion interpolation feature, but its effectiveness is limited due to the 60 Hz native refresh rate. Movie lovers will be pleased, as it can remove judder from 24p sources and from the native apps.
The LG UK6570PUB has an excellent fast response time. There are duplications in moving objects due to the 120Hz backlight, and this may bother some people. There is significant overshoot in some transitions, but this shouldn't cause any issues.
Unfortunately, the LG UK6570 uses PWM to dim the backlight, and there is flicker at all backlight levels. It flickers at 120 Hz, which can be noticeable to most people and may bother some.
The LG UK6570PUB does not have an option to adjust the backlight flicker to improve motion blur. Since the backlight flickers at 120 Hz by default, there would be little benefit to further reducing the flicker frequency, especially since 60 Hz flicker bothers many people.
The TV has a motion interpolation feature, but is limited to interpolating 30 fps content up to 60 fps, due to the 60 Hz panel. The 86" model has a 120 Hz panel, and is likely able to interpolate up to 120 fps.
Motion interpolation is enabled by setting TruMotion to 'User', and adjusting the De-Judder slider. Enabling motion interpolation can cause artifacts in some scenes.
The LG 75UK6570 does stutter a bit with 24p content, but not as much as many other TVs.
The LG 75UK6570PUB is able to remove judder from 24p sources and native apps only. It cannot remove judder from embedded sources, such as when watching a 24p movie from a cable box that sends 60p.
The Real Cinema feature must be enabled to remove judder from 24p sources.
The 70" and 75" UK6570s have a 60 Hz native refresh rate, the 86" model has a 120 Hz native refresh rate.
The LG UK6570 has excellent low input lag and supports the most common input resolutions. Unfortunately, there is no 1440p support and the refresh rate is limited to 60 Hz due to the 60 Hz panel on the 70UK6570 and 75UK6570. The 86UK6570 should support a 120 Hz input, as it has a 120 Hz panel. Chroma 4:4:4 is displayed properly, as long as the input label is set to 'PC'.
The TV supports the most common resolutions, but it does not support 1440p, even if forced. The 70" and 75" models do not support a 120 Hz input, due to the 60 Hz panel. The 86" model has a 120 Hz refresh rate, but we don't know if it will accept a 120 Hz input.
The 86" model has one additional USB port.
The sound quality of the LG UK6570 is average. This TV doesn't produce any sub-bass or rumble, but has a decent amount of body and punch to its bass. It also produces clear and intelligible dialog. However, it does not get loud, so won't be suitable for large and crowded places. For a better sound, dedicated speakers or soundbars are recommended.
The frequency response is average-at-best. LFE (low-frequency extension) is at 90Hz, which is decent. This means this TV won't produce any thump or rumble in the sub-bass region, but does have a good amount of punch and body to its bass. The response above the LFE points is even and flat, which is great and important for producing clear and intelligible dialog. However, this TV doesn't get loud, which may be a deal breaker if it's going to be used in large and crowded environments.
The distortion performance is decent. The overall amount of THD produced at 80dB is within decent limits. Also, there is not a big rise in THD under maximum load, which is good. However, this TV doesn't get very loud, so producing low THD at its maximum volume isn't that impressive.
The LG UK6570PUB has good smart features. The WebOS interface is easy to navigate, but some people may find it convoluted. The content store has an excellent selection of apps, and there are built-in apps and media players that cover most of the basics. The included remote is somewhat simple, and it requires line-of-sight with the TV, but it can be replaced with the LG Magic remote.