posted on Jan, 2 2010 @ 06:24 PM
I work in the LED lighting industry (design engineer) and I can categorically say that this is pure nonsense. This guy isn't going blind because he
watches a TV that is lit by LEDs -- I would happily state this in court too.
A LCD screen has a very diffused and even lighting -- I can't think of a product that would use a more diffused light off the top of my head. The
intention is to light the surface as evenly as possible. The only difference for the human eye between an LED lit screen and a fluorescent lit screen
would be the constituent colours that make up the white light because white LEDs are actually blue LEDs with a yellow phosphorous coating that makes
it appear white.
If you look directly at the LED (the actual light source) then you WILL damage your eyes. They are nasty little things because it is a very
concentrated point of light. However, if you diffuse the light over a bigger area then it becomes much more tolerable and are basically no different
to any other light source. Diffused to the level of a LCD screen would not affect your eyes any differently to looking at any bright light.
Sstark -- The reason your Christmas tree lights affect your Wii is because the Wii Sensor Bar contains a few little tiny infrared LEDs in either end
and the Wii Remote detects them and uses them for orientation and triangulation, having many point sources of light is confusing the camera in the
front of the Wii Remote. The blue lights must be coloured (painted) bulbs to show-up in the IR range of the spectrum.
Manta -- I can't think of a reason why a blue LED would be any worse than looking at any colour LED. As standby indicators on appliances they are
brighter than the old red and orange ones, so perhaps that is where that myth comes from.
Funnily enough, I don't really like LEDs, especially for white lighting. But they'll be all over the place in the next decade, street lighting for
instance (I designed one a couple of years ago as a DTI project.)
[edit on 2/1/10 by CarlosG] Grammar -- twice!
[edit on 2/1/10 by CarlosG]