Invention Grant
- Patent Title: Tunable white light based on polarization sensitive light-emitting diodes
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Application No.: US14567889Application Date: 2014-12-11
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Publication No.: US09951912B2Publication Date: 2018-04-24
- Inventor: Natalie Fellows DeMille , Hisashi Masui , Steven P. DenBaars , Shuji Nakamura
- Applicant: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
- Applicant Address: US CA Oakland
- Assignee: The Regents of the University of California
- Current Assignee: The Regents of the University of California
- Current Assignee Address: US CA Oakland
- Agency: Gates & Cooper LLP
- Main IPC: H01L29/20
- IPC: H01L29/20 ; F21K99/00 ; H01L25/075 ; H01L33/00 ; H01L33/58 ; F21V9/08 ; F21V9/10 ; F21V9/14 ; H01L33/32 ; H01S5/00 ; H01S5/343 ; F21K9/65 ; H01L33/16 ; H01L33/50 ; F21Y115/30 ; F21Y115/10

Abstract:
A lighting apparatus for emitting polarized white light, which includes at least a first light source for emitting primary light comprised of one or more first wavelengths and having a first polarization direction; and at least a second light source for emitting secondary light in the first polarization direction, comprised of one or more secondary wavelengths, wherein the first light and the secondary light are combined to produce a polarized white light. The lighting apparatus may further comprise a polarizer for controlling the primary light's intensity, wherein a rotation of the polarizer varies an alignment of its polarization axis with respect to the first polarization direction, which varies transmission of the primary light through the polarizer, which controls a color co-ordinate or hue of the white light.
Public/Granted literature
- US20150092386A1 TUNABLE WHITE LIGHT BASED ON POLARIZATION SENSITIVE LIGHT-EMITTING DIODES Public/Granted day:2015-04-02
Information query
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