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Patents regarding phosphors that emit a light of red color for LEDs (CASN and S-CASN)
Nichia has many patent (jointly-owned patent) applications in Japan, U.S.A. , Europe, China, Korea, and Taiwan regarding phosphors that emit a light of red color for LEDs, the phosphor represented by general formula of CaAlSiN3:Eu etc., These relate to CASN phosphor, S-CASN phosphor, and LEDs using these phosphors. There are already 15 patents including representative patent numbers as listed below.
Nichia has never licensed any of these patents to others. Nonetheless, CASN phosphor and S-CASN phosphor have been manufactured in large quantities without Nichia’s authority and LEDs using these phosphors also have been manufactured in large quantities as well. Nichia expects that these patents will be respected.
List of Relevant Patents: JP4414821, JP4415065, JP4422653, JP4511849, JP4511885, US7252788, US7273568, US7432647, US7476337, US7476338, EP1568753, EP1630219 (As of 2010/6/7)
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