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Why can liquid crystal display principle?

Author:admin Time:2017-06-29

LCD is a light transfer technology.
The principle is that an active filter is used to adjust the fixed intensity of the background light passing through the liquid crystal, so that the liquid crystal panel can display different graphics. The simple primary colors of red, green, and blue are obtained by simple filtering of white light, which forms the basic element of the display - pixels. Most liquid crystalline materials are a kind of molecular compound in the natural state.
22 inch cog press
The picture shows the European Union 22 inch cog press
According to the different liquid crystal molecular structure arranged into three types: claylike Smectic LCD, Nematic LCD and thin cylindrical shaped Cholestic soft cholesterol liquid crystal. The physical properties of the three liquid crystals vary, while the second class of thin column Nematic liquid crystals are best suited for fabricating liquid crystal displays. The molecules of liquid crystals are arranged in parallel directions along a central axis. To keep the molecules in line, they keep the liquid crystal molecules attached to the surface of the larger grooves. The liquid crystal molecules can slide along the grooves and are arranged in the direction of the grooves in contact with the surface of the grooves. Thus, if the trenches are closely parallel, then the alignment of the liquid crystal molecules can be closely parallel.
LCD is like a sandwich. The liquid crystal is sandwiched between two fine grooved plates, and the directions of the two grooves are perpendicular to each other by 90 degrees. If the grooves in one of the groove panels are arranged in parallel with the north-south direction, the grooves in the other fast groove plate corresponding to it are arranged in parallel according to the East-West direction. The liquid crystal layer in the two groove plate is strongly broken and twisted to 90 degrees. The light passes through the molecular queue and the liquid crystal layer is twisted 90 degrees. Since then, the Radio Corporation America (RCA) has found that voltage can act on liquid crystals. The voltage can rearrange the liquid crystal molecules and inhibit the passing of certain light.
LCD display images need to rely on polarization filters and light sources. The spectrum of nature can be scattered at any angle. Polarization filters can simply control the divergence direction of the spectrum. When the upper and lower two grooves have a certain angle between the surface of the plate, the liquid crystal is arranged in two different directions and the surface will distort. The result is the twisted spiral liquid crystal layer that distorts the light passing through it.
If the current passes through the liquid crystal, all molecules will be arranged in the direction of the current, which will reverse some of the band's light. If a polarization filter is placed on the upper surface of the liquid crystal layer, the twisted light can be reduced, while no twisting light will be blocked. Through this process, the LCD screen can filter the white light into other colors, and finally appear gorgeous colors on the screen.

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