LEDs Light Up LCD TVs
Sony has announced two new Qualia LCD TVs that use LEDs (light-emitting diodes) for their backlights instead of the traditional cold-cathode fluorescent lamps (CCFLs) used in almost all LCD monitors and televisions.
Source: PC MagazineThis new backlight design promises more colorful displays that are also easier on the environment. LCD panels create an image by selectively blocking the rays from a backlight. CCFLs generate invisible ultraviolet light, which excites the phosphors lining the lamp tubes, which then give off visible light. This light is stronger in the blue, green, and yellow ranges of the color spectrum, and doesn't have a deep red component, according to Mark Pugh, vice president for strategic marketing at Lumileds, the company that developed the LEDs used by Sony. "Our Luxeon LEDs can be tuned to match the needs of the display. In this case, we used red, green, and blue LEDs that closely match the color filters on the LCD panel. As a result, more light passes unimpeded through the filters, resulting in a richer display with more saturated colors."
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