Why are the screen edges of the LED television slightly lighter of color?

led tv contrast ratio image

John Tinke

I know the problem hasn't occured with LCD televisions.
I aslo know that a LED screen has more lamps and has a increase chance of failure.
The odds of pixel defects are higher. But it is so much thinner than LCD. More power efficient.
Better contrast ratio. My biggest problem is the screen edges are lighter of color. I mean after all its is best PQ we are after. Do the higher end models have this problem too?

Answer
Depends on the model.

Edge-lit LED TVs have all the light at the edge and use light-guides to spread the light.
They show "blooming", but can be made very thin.

Full-array LEDs have them spread in the back - in a full array. They provide better image quality, but are thicker.

Look for Full-array, back-lit, with Local dimming. = the best.

Is a dynamic contrast ratio of 3,000,000:1 really possible?

Jesus is o

I saw in one of Samsung's ads they claimed their new led tvs have a dynamic contrast ratio of 3,000,000:1. They're startiong at 1,600 on up to 5,000 dollars.

Answer
Dynamic contrast is meaningless. Look for "True contrast".

Basically, when they detect a "whole black" screen they can turn off the backlight, so they can make the "black" really small - almost 0, which explains the huge DC.

However, in a real picture you will have BOTH blacks and whites, so the number is meaningless. True contrast measures the ratio of white/black on the same picture.

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