LCD Light Theory
Monday, May 5th, 2008
The layer of liquid crystal between CF substrates and TFT substrates rotates into different angles depending on the charge applied to every pixel. When a million pixels receive different charges, the panel obtains a million LC angles in the area. The LC’s standing angle within millions of pixels needs to be controlled because the LC’s optic rotation nature needs to control the amount of light that passes through the LCD panel. Light from back light unit moves from the TFT panel through the ITO electrode, which is turned by Liquid Crystal before it reaches the LCD panel on the top.
The LC angle controls the amount of light that gets rotated. Light that does not get rotated by the LC gets absorbed by the top polarizer. The function of the polarizer is to filter most of the light and allow light traveling at the right direction to pass through.
