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LCD Science Popularization

2020-08-03

Let's first look at the LCD

LCD is what we usually call liquid crystal. It needs the support of backlight when displaying content, and the backlight will produce polarized light through glass, color filter, optical film, substrate and directional film, which will inevitably cause loss in color and Brightness.

The full name of TFT is thin film transistor. In LCD, TFT deposits a thin film on the glass substrate as the channel area to improve the image quality. The upper glass substrate is next to the color filter, and the lower glass substrate is inlaid with transistors. When the electric field changes when the current passes through the transistor, the LCD molecule will deflect and the polarization of the light will be changed. Then the polarizer will be used to determine the light and dark state of the pixel. At the same time, the color filter fitted with the upper glass forms the three primary colors of R, G and B contained in each LCD pixel, forming the screen displayed. Simply finished LCD, and then the panel type

The full name of TN panel is twisted nematic, and it is also one of many panel types.

Because of the low production cost, TN has become the most widely used entry-level panel. At present, the mainstream LCD TVs or displays in the market use TN, and early tablet and mobile phones are also used. Now many users equate TN with TFT, which is a conceptual confusion. Because of its mature technology and low price, TN is still favored by some low-cost products. At the same time, TN with high opening rate can save more power under the same brightness, and the response speed of 8-15ms is also faster. Therefore, under these advantages, even though TN has some disadvantages such as color distortion and narrow Viewing Angle, it still does not fade out of the market.

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