What Is a TFT LCD TV?
A TFT LCD TV delivers a crisp, colorful view of video imagery, using thin film transistors (TFT) to turn thousands of pixels in the liquid crystal display (LCD) on or off. When a pixel is turned on, it is lighted; when it is turned off, it remains dark.
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Functionality
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Thousands of pixels make up screen displays. Each pixel is individually controlled. A thin film transistor is a miniature switch designed to allow individual pixels within a liquid-crystal active-matrix display to be turned on or off, thereby delivering a lit pixel or a dark one, respectively, and according to the pixel parameters of the digitized color image being displayed. All of this activity is done with electrical charges to the transistors, within the LCD active-matrix grid.
Pixel Control
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Dot-pitch describes the distance between particular pixels, in millimeters. Through a complex process of the liquid-crystal cells being rapidly energized or de-energized to shift and control light and color, the TFT LCD TV delivers on color shifts and action scenes with little or no color drifting.
Pixels are measured in "dot-pitch" terms, using millimeters as the standard protocol and measuring between certain colored "dots." The lower the dot-pitch number, the sharper the display. High-resolution displays typically use .25 (that's "point 25") dot-pitch or lower.
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Active-matrix
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Colors, shapes, lines and details; it all starts with the pixels. The TFT LCD TV active-matrix is what makes possible the rapid and smooth shape and color changes seen on these sets. Because each and every pixel is "actively controlled," screen resolution and colors are well-defined and blended accurately, reflecting a true view of the source.
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References
- Photo Credit votre texte / image ici - ecran plat tft / lcd image by Melisback from Fotolia.com blu pixels image by cico from Fotolia.com Dots 3 image by chrisharvey from Fotolia.com colors image by AGITA LEIMANE from Fotolia.com
