The principle of liquid crytal display
Nowadays liquid crystal display is widely appearing in people's life, and we can find that liquid crystal is everywhere. So do you know what a liquid crystal is? Where did it come from?
Liquid crystal is a special substance between a solid and a liquid. It is an organic compound that is normally liquid. But the arrangement of its molecules is just as regular as a solid crystal. Hence the name liquid crystal. The other thing that makes it special is that if you apply an electric field to a liquid crystal, it changes its molecular arrangement, and in this case if you put a polarized light plate on it. It has the function of light passing through. If coupled with the color filter, change the size of the liquid crystal voltage, you can change the amount of light transmittance of a certain color, can also be said to change the voltage at both ends of the liquid crystal can change its transmittance.
Liquid crystal display (LCD) is a flat, ultra-thin display device consisting of a certain number of color or black and white pixels. It is placed in front of a light source or reflection. LCDs are popular with engineers because of their low power consumption. Suitable for electronic devices that use batteries. Its main equipment is to stimulate the liquid crystal molecules to produce points, lines, surface with the back lamp to form a picture. ,
LCD may not be a new term for many users. But the technology may have been around longer than we think. As early as the late 19th century, Austrian botanists discovered liquid crystals, namely liquid crystals. That is, a substance that has both the fluidity of a liquid and a certain arrangement of properties that resemble crystals. Under the action of electric field, the arrangement of liquid crystal molecules will change, thus affecting its optical properties. This phenomenon is called the electro-optic effect. Taking advantage of the electro-optical effect of liquid crystals, British scientists created the first liquid crystal display (LCD) in the last century. The world's first liquid crystal display equipment appeared in the early 1970s, known as TN-LCD (twisted nematic) liquid crystal display. Despite its monochrome display, it was pushed into calculators, electronic watches and other fields.
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