Operating principle of LCD screen. The working principle of LCD screen. Lcd display is the mainstream technology in the display field at present, with a wide range of products. The following focuses on the working principle of LCD display. 1、LCD structure LCD is the abbreviation of liquid crystal display. At present, TFT-LCD is the mainstream technology. LCD needs a backlight and a polarizer. The most important thing is that in two parallel glass sheets, a TFT thin film transistor (you can understand that there are many circuits), and on the above substrate, a CF filter (red, green, blue and RGB). Since the CF color filter has RGB color blocks, we will first pass through the TFT transistor substrate, then through the liquid crystal molecules, and then to the CF color filter according to the above order in the process of passing through the fluorescent screen. In each color block, because of the difference in transmissivity, there will be red, green, and blue colors. 2、Color principle Since the CF color filter has RGB color blocks, we will first pass through the TFT transistor substrate, then through the liquid crystal molecules, and then to the CF color filter according to the above order in the process of passing through the fluorescent screen. In each color block, because of the difference in transmissivity, there will be red, green, and blue colors. Of course, these color blocks must be much smaller to form a colorful picture, which is called "pixel"! 3、What is liquid crystal? Let's take a look at our hero, LCD, which is a special physical form. What we know most is gas, water vapor, liquid, ice, and a kind of plasma that everyone has heard of. This time, we need to get familiar with the shape of liquid crystal, which has the characteristics of both crystal and liquid. Most liquid crystal molecules are "rod molecules". They originally have various directions, but under different voltages, they will show different luminous properties, just like the metal in the magnetic field. When affected by the electric field, they will have specific directivity. Therefore, we can properly control the arrangement of liquid crystal molecules, so that some light can pass through, while others cannot, which will cause the difference in light transmittance. Operating principle of LCD screen. The above is a purely theoretical explanation. I hope this article can help you understand the working principle of LCD more deeply.
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