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Draw and explain working principle of LCD display. Compare and contrast LCD and LED televisions.
1 Answer
written 6.1 years ago by |
Passive-matrix:
LCDs use a simple grid to supply the charge to a particular pixel on the display. Creating the grid is quite a process.
It starts with two glass layers called substrates. One substrate is given columns and the other is given rows made from a transparent conductive material. This is usually indium-tin oxide.
The liquid crystal material is sandwiched between the two glass substrates, and a polarizing film is added to the outer side of each substrate.
To turn on a pixel, the integrated circuit sends a charge down the correct column of one substrate and a ground activated on the correct row of the other.
Active-matrix: