High-Brightness Matrix LEDs: Meeting Packaging ChallengesDownload the Paper!
Light-emitting diode (LED)-based applications are growing, and cover a broad range of markets including automotive lighting applications such as indicators, spot utility, and headlamps; camera functions like display backlights and camera flashes; consumer products such as LCD display backlight and projection systems; architectural uses like accent lighting for buildings, and signs; and many others. LEDs are bright, efficient, and quick to react. They have become a substitute for light bulbs in many applications because they use less power, have longer lifetimes, produce little heat, and emit colored light.
Using LEDs for general lighting is becoming more practical as they become increasingly more efficient, generating more lumens per watt. For example, a fluorescent tube equivalent of 3,000 lumens would have required over 1,300 LEDs using 30 lumens/watt at 2 to 3 lumens per LED in 2003. However, by 2005, there was a 20X reduction in the number of LEDs required for the same florescent tube, to around 50, using 50 lumens/watt or higher at 60 lumens per LED.
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