The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 21, 2010
Filed:
Jul. 01, 2010
Yoshinori Shimizu, Anan, JP;
Kensho Sakano, Anan, JP;
Yasunobu Noguchi, Anan, JP;
Toshio Moriguchi, Anan, JP;
Yoshinori Shimizu, Anan, JP;
Kensho Sakano, Anan, JP;
Yasunobu Noguchi, Anan, JP;
Toshio Moriguchi, Anan, JP;
Nichia Corporation, Anan-shi, JP;
Abstract
A device for emitting white-color light comprises: a light emitting diode including: an LED chip comprising a gallium nitride compound semiconductor containing indium and being capable of emitting a blue color light, and a phosphor capable of absorbing a part of the blue color light and emitting a light having longer wavelength than the blue color light, the blue color light and the light from the phosphor being mixed to make the white-color; a control unit for converting an input to pulse signals; and a driver receiving the pulse signals from the control unit to drive the LED chip, wherein the brightness of the white-color light from the light emitting diode is controlled by a width of the pulse signals.