What is a TFT Screen?
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What is a TFT Screen? Also known as Active Matrix, TFT stands for Thin Film Transistor and at present is the best quality screen available and most expensive, high contrast (1:150), fast speed . As a result the screens are more expensive but they are brighter, have better colour, minimize ghosting and are easier to view from side angles. Liquid crystal was discovered by the Austrian botanist Fredreich Rheinizer in 1888. "Liquid crystal" is neither solid nor liquid (an example is soapy water). In the mid-1960s, scientists showed that liquid crystals when stimulated by an external electrical charge could change the properties of light passing through the crystals. The early prototypes (late 1960s) were too unstable for mass production. But all of that changed when a British researcher proposed a stable, liquid crystal material (biphenyl). TFT LCD (Thin Film Transistor Liquid Crystal Display) has a sandwich-like structure with liquid crystal filled between two glass plates. TFT Glass has as many TFTs as the number of pixels displayed. Liquid crystals move according to the difference in voltage between the Color Filter Glass and the TFT Glass. The amount of light supplied by Back Light is determined by the amount of movement of the liquid crystals in such a way as to generate color. |
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