Invention Grant
- Patent Title: Lighting device capable of changing a color of illumination light and lighting fixture
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Application No.: US15178825Application Date: 2016-06-10
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Publication No.: US09756695B2Publication Date: 2017-09-05
- Inventor: Koji Uenoyama , Koji Watanabe , Hiroyuki Matsumoto , Shinichi Murakami , Yuichirou Hirowatari
- Applicant: Panasonic Intellectual Property Management Co., Ltd.
- Applicant Address: JP Osaka
- Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee: Panasonic Intellectual Property Management Co., Ltd.
- Current Assignee Address: JP Osaka
- Agency: Renner Otto Boisselle & Sklar, LLP
- Priority: JP2015-123950 20150619
- Main IPC: H05B33/08
- IPC: H05B33/08 ; F21V29/76 ; F21V7/00 ; F21V14/02 ; F21V23/02 ; F21Y101/00 ; F21Y101/02

Abstract:
The lighting device includes a controller for determining first, second, and third desired values of first, second, third drive currents to first, second, and third light sources, based on a correction coefficient for correcting chromaticity points of the first, second, and third light sources to first, second, and third chromaticity points. The first, second, and third light sources have first, second, and third ranges of individual differences in color. The first chromaticity point is an intersection of a straight line touching the first and second ranges and another straight line touching the first and third ranges. The second chromaticity point is an intersection of a straight line touching the second and first ranges and another straight line touching the second and third ranges. The third chromaticity point is an intersection of a straight line touching the third and first ranges and another straight line touching the third and second ranges.
Public/Granted literature
- US20160374160A1 LIGHTING DEVICE AND LIGHTING FIXTURE Public/Granted day:2016-12-22
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