US Patent 7773646 Semiconductor light source and light-emitting device drive circuit
Patent 7773646 was granted and assigned to Panasonic on August, 2010 by the United States Patent and Trademark Office.
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Patent abstract
A semiconductor light source includes a light-emitting device 101 having a plurality of semiconductor layers made of nitride semiconductors, and a drive circuit 102 for driving the light-emitting device 101. The drive circuit 102 performs forward drive operation, in which a forward current is supplied to the light-emitting device to make the light-emitting device 101 emit light, and reverse drive operation, in which a reverse bias is applied to the light-emitting device. The magnitude of the reverse bias is limited by the value of a reverse current flowing through the light-emitting device.
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Patent Inventor Names
Daisuke Ueda0
Katsumi Sugiura0
Kenichi Matsuda0
Masaaki Yuri0
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US Patent 07773646 Semiconductor light source and light-emitting device drive circuit US Patent 7773646 Semiconductor light source and light-emitting device drive circuit
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Patent Number
077736460
Patent Number
77736460
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Official Website
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Infobox
Is a
Current Assignee
Patent Jurisdiction
Patent Number
077736460
Date of Patent
August 10, 2010
0Patent Application Number
122806030
Date Filed
March 14, 2007
0Official Website
Patent Primary Examiner
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US Patent 07773646 Semiconductor light source and light-emitting device drive circuit
Infobox
Is a
Current assignee
Patent jurisdiction
Patent number
07773646
Date of patent
August 10, 2010
Patent application number
12280603
Date Filed
March 14, 2007
Patent primary examiner
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