How does a TFT display show patterns?

Briefly explain the structure and display principle of TFT-LCD. TFT-LCD liquid crystal panel consists of backlight, polarizer, transparent electrode (control circuit), liquid crystal, color filter and polarizer.

　　When linearly polarized light strikes the upper slit, it rotates with the liquid crystal molecules; when linearly polarized light strikes the lower slit, it has rotated 90 degrees. When a voltage is applied between the upper and lower surfaces, the liquid crystal molecules are aligned in the direction of the electric field, forming a vertical alignment. At this point, the incident light is not affected by the liquid crystal molecules, and a straight line cannot shoot out of the lower surface. Different voltage values determine the angle of liquid crystal deflection.

　　Then the screen is usually an internal LED as a light source, emitting white light. Then we know that white light is into light waves by combining many different frequencies of light waves. Then we teachers can get through the filter film to improve our own desired color. Although each color of visible light has a certain range of wavelengths, we do not need to represent the wavelength of each color separately. Because all colors in nature can be obtained by combining the different intensities of the three wavelengths of red, green and blue (RGB colors), this is often referred to as the principle of the three primary colors. For this reason, these three types of light are often referred to as trichromatic light or tricolor light. The three colors are filtered out through a filter film, and then the rotation angle of the liquid crystal is adjusted by changing the drive voltage, thus changing the amount of light passing through the RGB sub-pixels, and using the principle of additive color mixing to obtain a rich color expression.

　　This is the enterprise due to China's liquid crystal display is the use of liquid crystal molecules to twist the internal control of light through and through, and liquid crystal molecules of the twist we need to go through a development process, so the response of the LCD display working time is not significantly longer than the other displays life style. Especially in between all-black, all-white between the smaller amplitude gray scale change, need to apply the influence of small voltage to analyze the accurate and fine angle research control, so for liquid crystal molecule twisting speed instead of slower.

　　Therefore, the refresh rate of the screen is also limited by the liquid crystal material. I believe that the future of the display technology will be more diverse, to bring us a better experience.

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