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TFTThin Film Transistor. Used in LCD display technology where each pixel is controlled by one to four transistors. TFT LCD's are often referred to as active matrix displays. TN+FilmTwisted Nematic is the most common type of TFT LCD technology. When no voltage is applied, the chains of liquid crystal molecules are twisted to 90°, allowing light to pass through the molecules. When voltage is applied, the liquid crystals rotate and polarized light is absorbed by a special filter. TN is not only the most common TFT LCD technology, but also the cheapest. TN is a good technology for achieving keen response times and whilst viewing angles were compromised in early development, a special film has now been added to the panel surface to significantly extend the viewing angles.
Tr/ Tf (Time raise / Time fall)This means the response time of an LCD panel is mentioned as the time when the emitted light from one transistor (pixel) is going from black to white and from white to black.
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