It so disappointing when you watch movie in the dark and you can see that the black color of your TV it’s not the same black as the room that you are in, it’s looks more like a dark grey.
In: Technology
One way to create television displays which is very common these days is an LCD, or liquid crystal display. There is a white light behind a series of tiny colored cells (red, green, and blue) which are blocked in varying amounts by a liquid crystal matrix in order to form the desired image.
The problem is that the liquid crystals can’t ever block *all* the light perfectly so they can’t reach a perfect black. The backlight always makes it through a little bit.
An older technology of a CRT which uses an electron beam to make the screen glow doesn’t have this problem but they are bulky, heavy, and use a good bit of power. Newer technology of OLED displays don’t have this problem but they are expensive and subject to wear that can “burn in” frequently displayed images. So it is all a trade off.
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