Funny picture distortion? On black screens?

Richardsworld

Novice Member
hi

I bought a
LG 65UK6500PLA 65-Inch UHD 4K HDR Smart LED TV with Freeview Play - Steel Silver/Black (2018 Model). From amazon. Big box. But I notice when on a black screen when I move the magic remote cursor. The cursor seems to affect the blackness. It follows it around. I’m afraid it’s been damaged or it’s a manufacture fault. The thing is as well I’ve recycled the box.
 

JayCee

Distinguished Member
I doubt it's faulty.
Judge your new TV on a normal signal not a blank raster.
 

LGSAM

Active Member
That will be the local dimming doing its thing , creates a halo around objects , you can turn that off if it affects normal viewing , definatly not a faulty TV .
 

LGSAM

Active Member
It will be vertical as I think that is a edge lit set . If you turn off local dimming you may find the blacks may not be as black .
 

Andrew1472

Distinguished Member
That looks completely normal to me for an edge lit IPS panel.
The LEDs are at the bottom of the screen and light up the section of the screen needed and stay switched off where they are not needed which results in a column of light. In other words exactly what you are seeing.
Whether local dimming is working correctly is another matter. I suspect it is, but you are running it with a completely black screen which, I’m sure you realise, isn’t typical of normal viewing and many TVs shutdown the backlight in that scenario no matter what dimming is set to.
Try it with a dark movie, like Gravity for example, with local dimmming on and off and see how it looks then.
 

SeeMoreDigital

Well-known Member
... The cursor seems to affect the blackness. It follows it around...
You'll see something similar when watching content with subtitles ;)

As others have said, it's one of the limitations of 'edge lit' IPS panel technology.
 

Richardsworld

Novice Member
Yeah I tried it. The earth is ok. But the instance it finishes on the screen. It goes darker. The picture is amazing on vivid. Mode. At the start of gravity film. It has white writing. I can see it then. But not when Earth on the the screen.
 

Andrew1472

Distinguished Member
Yeah I tried it. The earth is ok. But the instance it finishes on the screen. It goes darker. The picture is amazing on vivid. Mode. At the start of gravity film. It has white writing. I can see it then. But not when Earth on the the screen.
As @SeeMoreDigital said, it’s a limitation of the technology. I’m confident there is nothing wrong with the tv.
Your choice is have local dimming on and suffer the columns of light, or off and suffer greyer blacks over the whole screen. Plenty of light in the room and backlight as low as you can will help.
Investigate bias lighting too. The Vansky led strip available from Amazon can work wonders with problems like yours. Its not expensive either.
 

LGSAM

Active Member
Does that TV have local dimming ? It may have some form of global dimming instead , because the light looks very wide around the curser .
 

LGSAM

Active Member
Hell , I have had 2 LG TVs , the first was an edge lit with local dimming and I now have a back lit with local dimming , while the backlit is superior I’m sure the edge was never that bad . You would think the technology would have improved .
 

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