Invention Grant
- Patent Title: Solid state lighting devices including light mixtures
- Patent Title (中): 固体照明装置，包括轻质混合物
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Application No.: US12491654Application Date: 2009-06-25
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Publication No.: US08998444B2Publication Date: 2015-04-07
- Inventor: John Roberts , Gerald H. Negley , Antony P. van de Ven , Arpan Chakraborty , Bernd Keller , Ronan P. Le Toquin
- Applicant: John Roberts , Gerald H. Negley , Antony P. van de Ven , Arpan Chakraborty , Bernd Keller , Ronan P. Le Toquin
- Applicant Address: US NC Durham
- Assignee: Cree, Inc.
- Current Assignee: Cree, Inc.
- Current Assignee Address: US NC Durham
- Agency: Myers Bigel Sibley & Sajovec, P.A.
- Main IPC: F21V9/00
- IPC: F21V9/00 ; F21K99/00 ; F21S4/00 ; F21Y101/02 ; F21Y105/00 ; H01L25/075 ; H01L33/50 ; F21Y103/00
Abstract:
A solid state lighting apparatus includes a plurality of light emitting diodes (LEDs) including at least a first LED and a second LED. Chromaticities of the first and second LEDs are selected so that a combined light generated by a mixture of light from the pair of LEDs has about a target chromaticity. The first LED may include a first LED chip that emits light in the blue portion of the visible spectrum and a phosphor that emits red light in response to blue light emitted by the first LED chip. The second LED emits light having a color point that is above the planckian locus of a 1931 CIE Chromaticity diagram, and in particular may have a yellow green, greenish yellow or green hue.
Public/Granted literature
- US20100079059A1 Solid State Lighting Devices Including Light Mixtures Public/Granted day:2010-04-01
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