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Principle of Liquid Crystal Display
Sep 06, 2018

The liquid crystal display realizes display by utilizing the characteristics that the liquid crystal molecules change in alignment when the external electric field changes, and then can transmit or block visible light. 


When the conductive glass is energized, an electric field is formed, and the electric field can control the rotation of the liquid crystal molecules. The liquid crystal molecules allow or disallow the passage of light at different rotation angles, so that the liquid crystal molecules become a "switch" for blocking or transmitting light. White or black display can be achieved by driving the electric field to control the liquid crystal molecules to be transparent or opaque. Each pixel of the color display panel is composed of three sub-pixel units of red, green and blue, and can be independently controlled, and the "brightness" of the three colors is separately controlled by the foregoing principle, so that the three colors are mixed into the color required by the pixel. Color display is possible.


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