LCD
2011-09-05 by seoer

LCD display, or LCD (Liquid Crystal Display), the flat thin display device, which consists of a number of color or black and white pixels, placed on the front side light or reflector. LCD power consumption is very low, so much favored by engineers, for battery-powered electronic devices. Its main principle is based on current liquid crystal molecules to stimulate the point, line, surface and compose the picture with the back of the tube.
LCD Origin

LCD display (Liquid Crystal Display), for many users is not likely to be a new term, but there is history of this technology may be far beyond our imagination - in the 19th century, the Austrian botanist on found in liquid crystal, that liquid crystals, a substance that also has a flow of liquid crystals and a similar arrangement of features. In the electric field, liquid crystal molecules are arranged will produce change. Thus affecting its optical properties, a phenomenon known as electro-optic effect. Using liquid crystal electro-optic effect, in the last century British scientists create first a liquid crystal display that is LCD. Today's LCD is widely used linear fixed LCD, microscopic look at it if we will find it especially like a cotton swab. Compared with the traditional CRT, LCD is not only small and thin (the thickness of the current 14.1-inch machine may be only 5 cm), light weight, low energy consumption (1 to 10 microwatts / square centimeter), low voltage (1.5 to 6V) and no radiation, no flicker and can be matched directly with CMOS integrated circuits. Because many advantages, LCD from 1998 into the desktop applications. . The first operational LCD based on the dynamic scattering mode (Dynamic Scattering Mode, DSM), RCA's George Herrmann's team developed the LCD. Herrmann created Optel company, the company has developed a series based on this technology of LCD. December 1970, the rotation of nematic liquid crystal FET characteristics cents in Switzerland and Helfrich Hoffman - Le Luoke central laboratory registered as patents. In 1969, James Ferguson in the United States Ohio Kent State University (Ohio University) found the rotation of nematic liquid crystal field effect, and in February 1971 in the United States registered the same patent. 1971, his company (ILIXCO) produced the first feature based on the LCD, quickly replaced the poor performance of DSM-type LCD. In 1985, after finding it had a commercial value, in 1973 Japan's Sharp Corporation for the first time it is used in production of electronic calculator figures. Now, LCD notebook and handheld computer's main display device, projector, it also plays a very important role, and it began to penetrate the desktop monitor market.

LCD early development

All along, the pursuit of more perfect visual enjoyment are our target desktop display devices, display technology in recent years the development review process, we find that it is around the same theme - "the pursuit of better visual comfort of the human eye." ! as a sudden new rise in recent years, new products, liquid crystal display has been fully replace the bulky CRT monitors into the mainstream of current display devices. However, the development of liquid crystal display of the road is not smooth sailing as we had imagined. Here, we review old and new players to LCD in recent years, the development of hard twists and turns of the road. LCD early development (1986 ~ 2001) - inhibit the development of the high cost of road early immature technology, LCD is mainly used in electronic watches, calculators and other areas we usually say the LCD, it's the English full name Liquid Crystal Display, is directly translated into Chinese liquid crystal display, referred to as liquid crystal displays. LCD is an almost completely transparent material. Its molecular arrangement determines the path of light through the LCD. To the 1960s, it was found that charge to the liquid crystal will change its molecular arrangement, thus lead to distortion or refraction of light, which sparked the idea of ​​invention liquid crystal display devices. The world's first liquid crystal display devices in the early 1970s, known as TN-LCD (twisted nematic) alphanumeric LCD module. Although a monochrome display, it still extended to a spreadsheet, calculator and other fields.

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