19. The principle of LCD screen

19. The principle of LCD screen

LCD Working principle Analysis:

1.LCD Hardware Architecture:

LCD hardware system: You can see the LCD controller is in the ARM processor, with a cable to the LCD screen and the processor connected together. The middle is through the LCD driver chip.

1.1 LCD:

Liquid crystals belong to an organic compound, the molecular shape of a long rod, under the action of different currents, the molecules will do a regular rotation, so that the light (backlight) produced a certain degree of control (refraction), the formation of a pixel, and many pixels can form a complete image.

1.3 LCD Driver Chip:

The LCD driver chip is a module that controls the change of the liquid crystal molecule, which provides the voltage for the deflection of the liquid crystal molecule. Typically, the LCD driver chip is made on a circuit board with the LCD panel.

The above figure knows that the liquid crystal molecules are able to achieve a regular deflection because of the deflection voltage. The deflection voltage of the drive chip is based on the information of the LCD controller:

1.4 LCD Controller:

19. The principle of LCD screen