China's LED industry to break the bottleneck to break the white LED patent barriers

Made of current white LED industry usually use two methods: one is the red, green and blue three LED hybrid package on a substrate, by adjusting the three color ratio in the synthesis of white light; two is on the surface of blue LED coated with a layer of yellow fluorescent powder to generate white light LED.

The advantages of first method is to make the white LED true, but the drawback is that the cost is too high and the package required larger than second methods, because at least with the green and red LED, the second method has the advantage of low cost and small volume, but the drawback is that yellow phosphor need high the quality of the.

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Chinese at present most packaging factory (including Taiwan packaging factory) have adopted second methods for producing white LED fluorescent powder, but most rely on imports, because aluminate yellow fluorescent powder is Japan's Nichia patent, we do not have their own patented products, this is also the reason why Chinese packaging factory in the export of white light LED products will meet the Japanese and German patent barriers.

Fortunately, founded in 2005 in Beijing webtek Technology Development Co. Ltd. recently successfully developed a new nitrogen oxide yellow phosphor, and successfully obtained national patent. The patent Chinese broke the lack of new, high-end white LED phosphor with status of core technology, successfully eliminate the bottleneck of the development of Chinese LED industry, because Chinese LED packaging factory based on white LED it will avoid in the export of Japanese and German patent barriers no longer patent infringement problems.

Present LED phosphor materials mainly can be divided into the following four categories: nitrogen oxide phosphor, aluminate (YAG) phosphor, silicate phosphor and barium magnesium aluminate salt (BAM) fluorescent powder, YAG powder can only make Portland, only to make green powder and orange powder, BAM can only make green powder. Only nitrogen oxides can make the red, green and yellow powder, covering all the color from blue to red, is a mainstream development trend in the future.