Japan's LED giant Nichia Corporation recently announced a series of patents on red phosphors for LEDs. The patent has been applied in Japan, the United States, Europe, China, Korea and Taiwan.
Nichia said that as of June 7, 2010, the red fluorescent powder for LEDs based on CaAlSiN3:Eu has obtained 15 patents including the following patent registration numbers. Part of the patent registration numbers are as follows: JP 4424821, JP 4415065, JP 4422653, JP 4511849, JP 4511885, US 7252788, US7273568, US 7432647, US7476337, US7476338, EP1568753, EP1630219.
The company specifically pointed out that the above patents have not yet been authorized for use by any other company, but CASN phosphor powder, S-CASN phosphor powder and LEDs using the phosphor powder are numerous without the authorization of Nichia. Manufacturing and selling, it is necessary to inform all relevant industry players to respect the patent rights of Nichia.
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