Invention Grant
- Patent Title: Lighting apparatus and method for emitting light having different color temperatures
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Application No.: US14405554Application Date: 2013-05-21
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Publication No.: US09638397B2Publication Date: 2017-05-02
- Inventor: Xiaoyan Zhu , Wenyi Li , Shitao Deng , Miao Zhang
- Applicant: PHILIPS LIGHTING HOLDING B.V.
- Applicant Address: NL Eindhoven
- Assignee: PHILIPS LIGHTING HOLDING B.V.
- Current Assignee: PHILIPS LIGHTING HOLDING B.V.
- Current Assignee Address: NL Eindhoven
- Priority: CNPCT/CN2012/076511 20120606
- International Application: PCT/IB2013/054176 WO 20130521
- International Announcement: WO2013/182932 WO 20131212
- Main IPC: F21V13/02
- IPC: F21V13/02 ; F21V3/00 ; F21S8/08 ; F21V5/04 ; F21V9/16 ; F21V9/08 ; F21W131/103 ; G02B19/00 ; F21Y101/00 ; F21Y105/10 ; F21Y115/10 ; F21Y107/20
Abstract:
There is provided a lighting apparatus and a method for reducing discomfort glare. The method comprises a step of providing a first portion of light radiation in a first incident angle range; and another step of providing a second portion of light radiation in a second incident angle range consecutive to the first incident angle range. The first incident angle range is greater than the second incident angle range viewed from a vertically downward direction of a light source emitting the light radiation, and the correlated color temperature of the first portion of light radiation is lower than that of the second portion of light radiation.
Public/Granted literature
- US20150167930A1 LIGHTING APPARATUS AND METHOD FOR REDUCING DISCOMFORT GLARE Public/Granted day:2015-06-18
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