Invention Grant
- Patent Title: Semiconductor light emitting devices having selectable and/or adjustable color points and related methods
- Patent Title (中): 具有可选择和/或可调色点的半导体发光器件和相关方法
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Application No.: US13546099Application Date: 2012-07-11
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Publication No.: US08791642B2Publication Date: 2014-07-29
- Inventor: Antony P. van de Ven , Jason Taylor , Paul Kenneth Pickard , Gauss Ho Ching So , Heidi Dieringer , Andrew Dummer
- Applicant: Antony P. van de Ven , Jason Taylor , Paul Kenneth Pickard , Gauss Ho Ching So , Heidi Dieringer , Andrew Dummer
- 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: H05B37/02
- IPC: H05B37/02
Abstract:
Light emitting devices include a first string of LEDs that emit light having a color point that is within at least eight MacAdam ellipses of a first blue-shifted-yellow region on the 1931 CIE Chromaticity Diagram, a second string of LEDs that emit light having color point that is within at least eight MacAdam ellipses of a second blue-shifted-green region on the 1931 CIE Chromaticity Diagram, and a third light source that emits radiation having a dominant wavelength between 600 and 720 nm. A drive circuit supplies respective drive currents to the first string of LEDs, the second string of LEDs and the third light source, at least two of which are independently controllable.
Public/Granted literature
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