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LED history

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The LED was first reported in 1907 as a solid material that could be illuminated by current, but was initially used only for indication purposes. In 1993, with the invention of blue LED, the three primary color R, G, B light sources of LED were developed accordingly. In 1996, a yellow phosphor was added to a blue LED to realize a white LED. Since then, through continuous technological improvement, an era of LED energy-saving lighting is coming.

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