Wednesday, October 19, 2011

Monitor Display Technology


Monitors are made of invariably 2 layers - a front layer of LCD (Liquid Crystal Display or Liquid Crystal Diode) that makes up the dots you see as pixels, along with the display of color.

This LCD layer is then back-lighted using light tubes at the back, giving it brightness. Formerly, LCD displays use to use CCFL (Cold Cathode Flourescent Lamp) as a light source at the back, but however in recent years there has been a marked shift towards the use of LED (Light Emitting Diode) as a back-light source. 


The advantages of LEDs are as follows:
1.    Faster Turn On: LEDs can reach maximum brightness faster than CCFLs, in fact almost instantly.
2.    More Neutral Colors: CCFLs are known to give a warm/yellowish tint. LEDs have a more neutral whitepoint.
3.    Brighter: LEDs are brighter generally than CCFLs, thus allowing a display to achieve even higher maximum brightness.
4.    Thinner: The reason LEDs are coming into prominence is that it was driven by the notebook sectors - LED back-lighting can be made thinner than CCFL back-lighting.
5.    Longer-Lasting: Apparently, LEDs are rated for more life than CCFLs. Also the degradation over time is less severe than CCFLs.


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