Telling apart LCD and plasma TVs

All it takes is a polarizing filter. LCD screens can blackout when the filter is set at the right angle. Plasma screens, on the other hand, remain unaltered.

Category:

Science & Technology

Tags:

• plasma
• lcd
• polarizaton
• filter

[cesarastudillo]

To make a long story short: LCDs paint pixels by using polarized light (they use a layer of liquid crystal behind a polarizing filter). That means the light out of a LCD screen is polarized. If you set a polarizing filter to 90 degrees from the screen's filter, you will make the screen go black. This doesn't work with other technologies such as CRT, OLED or plasma, in which pixels are painted via individual light emitters.

[CoasterCloud]

Do we get affected in any way by lcd or plasma? Our eyes for example.

[OrangeMonkeyProD]

@totetoBT seriously, you actually think this guy would go to the hassle of faking it?, your a fool

[totetoBT]

This is FAKE, if they turn black in some angle, the tree LCD aren't in same angle some is on 90, some is 120...

And btw that in the middle up is small plasma 32"?

[analogWeapon]

Neat! Note also that some polarizing filters are designed to be put on auto-focus lens and wouldn't require the rotation. This method of determining also works without touching the screen, which is a bonus.

[YattaDante]

That's interesting.

[jk31213]

umm... the difference between plasma and lcd is plasma is glass screen. lcd is plastic

[ukcameraman]

or just lightly push the screen, if it goes white where your fingers pushing, its an lcd - pointless

[danchoi704]

''i wonder what he tryna tell us".

[MountainMaxx]

So what.......

[123omgwtfbbqX]

ok so wat is better