Originally Posted by emig647
I did not know that about LEDs... Originally I was going to purchase an NEC... then I saw this. I guess I'll be going back to NEC since they are in that same price range.
Let me tell you, it bothered the hell out of me! I was going to argue with the guy about it, but then I realized he was right!
There are two ways to provide the backlight. One, and the really expensive way, is to use about 60 high power RGB LEDs in a manner that uses a diffuser and reflector to combine the light from all the LEDs into one combined beam. If some LEDs dim too fast, the entire display is affected equally, and can be adjusted.
The other, cheaper way is to use about a thousand white LED's, and distribute them behind the panel. That's the way the (cheap!!!) displays are being made now, including the several thousand dollar 30" displays.
The NEC 20" LED display that they do have uses the first method, is about four to five inches thick, weighs a lot for an LCD, and costs about $7 to $8 thousand bucks. The same for the Samsung.
I don't know how Apple is doing the laptop displays. Some of them use light tubes to distribute the light, but it can't be used for a big display.