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LED ARRAY ON PARTIALLY REFLECTIVE SUBSTRATE WITHIN DAM HAVING REFLECTIVE AND NON-REFLECTIVE REGIONS
LED ARRAY ON PARTIALLY REFLECTIVE SUBSTRATE WITHIN DAM HAVING REFLECTIVE AND NON-REFLECTIVE REGIONS
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机译:在具有反射和非反射区域的Dam中的部分反射基板上的LED阵列
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摘要
A packaged light emitting device 100 that allows enhanced light cutoff in lighting applications to better control glare and optimize lumen output. Packaged device 100 includes both a reflective dam region 34 and a non-reflective dam region 36 to increase output of useful light while mitigating reflection of light that can cause glare. An array 4, preferably linear, of light-emitting diodes 3 is formed on printed circuit board (PCB) 1, and surrounded by dam 30 which bounds encapsulant 40. A first circuit board portion 20 of PCB upper surface 2 enclosed within dam 30 disposed forward of LED array 4 and adjoining non-reflective dam portion 36 is non-reflective, such as being black. A second circuit board portion 22 is reflective, such as being white. Packaged device 100 is suited for automotive headlights and fog lights.
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