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I
Construction of LCD Display
1. Construction of LCD Display
1-1 Principle of LCD Display
The LCD (Liquid Crystal Device) Display is used to display the electric signal, converted from picture
data similar to a CRT display. The transistor (TFT) switched by the electric signal changes the transmis-
sion to light in small picture elements (pixels) of the LCD. The LCD display makes the picture by grouping
these elements of each RGB color.
1-2 Construction of LCD Display
LCD Display
Liquid Crystal is packed between the board modules (TFT and Common) and the LCD panel (or LCD
shutter) is constructed. A back light is attached to the LCD panel for LCD Display.
Board Module (Common Electrode)
The Common Electrode consists of a polarized board, a color filter, and a transparent electrode on a
glass plate. An alignment film is formed on the transparent electrode.
Board Module (TFT Electrode)
The TFT Electrode consists of a polarized board and a transparent electrode (pixel electrode and drive
transistor) on a glass plate. An alignment film is formed on the transparent electrode.
Backlight
A fluorescent light is used for the Backlight.
✐
TFT:
Thin Film Transistor
✐
LCD Panel and LCD Shutter:
They are the same things, but in the explanation LCD panel is used
for structure and LCD shutter is used for function.
-2-
Training Manual Principle of LCD
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