Technologies behind Liquid Crystal Display
TECHNOLOGIES BEHIND LIQUID CRYSTAL DISPLAY (LCD) Brief Overview-
A thin, flat electronic visual display that uses the light modulating properties of liquid crystals is known as a liquid crystal display. Direct light is not emitted by LCDs. Displaced cathode ray tube (CRT) displays of LCDs are used in most applications. Two sheets of polarizing material, are used in LCD displays, with a liquid crystal solution between them. The crystals align as a result of an electric current, so that light cannot pass through them. Each crystal, therefore, is like a shutter, either blocking the light or allowing light to pass through. Some of the technologies behind liquid crystal display are as follows
Illumination-A cold cathode fluorescent lamp that is situated behind the LCD panel is used as an external lighting mechanism as LCD panels produce no light of their own. The conventional backlit LCDs are now being widely replaced by two types of LED backlit LCD displays.
Active Matrix-This design depends on the usage of thin film transistors (TFT) — basically, tiny switching transistors and capacitors. One of the most important technologies behind liquid crystal display. These are arranged in a matrix on a glass substrate. They are required to switch the LCD's pixels on and off rapidly. In LCDs, each colour pixel is created by three sub-pixels with red, green and blue colour filters.
Twisted Neman tics-To allow light to pass through, twisted nematic displays containing liquid crystal elements are used, these twist and untwist at varying degrees to allow light to pass though .Any grey level or transmission can be achieved by properly adjusting the level of the voltage.
Advanced fringe field switching (AFFS)-This technology provides superior performance and colour gamut with high luminosity. It helps in maintaining a wider viewing angle for a professional display and also minimizing colour distortion. Enhancement of the white/grey reproduction is achieved by optimizing
A thin, flat electronic visual display that uses the light modulating properties of liquid crystals is known as a liquid crystal display. Direct light is not emitted by LCDs. Displaced cathode ray tube (CRT) displays of LCDs are used in most applications. Two sheets of polarizing material, are used in LCD displays, with a liquid crystal solution between them. The crystals align as a result of an electric current, so that light cannot pass through them. Each crystal, therefore, is like a shutter, either blocking the light or allowing light to pass through. Some of the technologies behind liquid crystal display are as follows
Illumination-A cold cathode fluorescent lamp that is situated behind the LCD panel is used as an external lighting mechanism as LCD panels produce no light of their own. The conventional backlit LCDs are now being widely replaced by two types of LED backlit LCD displays.
Active Matrix-This design depends on the usage of thin film transistors (TFT) — basically, tiny switching transistors and capacitors. One of the most important technologies behind liquid crystal display. These are arranged in a matrix on a glass substrate. They are required to switch the LCD's pixels on and off rapidly. In LCDs, each colour pixel is created by three sub-pixels with red, green and blue colour filters.
Twisted Neman tics-To allow light to pass through, twisted nematic displays containing liquid crystal elements are used, these twist and untwist at varying degrees to allow light to pass though .Any grey level or transmission can be achieved by properly adjusting the level of the voltage.
Advanced fringe field switching (AFFS)-This technology provides superior performance and colour gamut with high luminosity. It helps in maintaining a wider viewing angle for a professional display and also minimizing colour distortion. Enhancement of the white/grey reproduction is achieved by optimizing