Invention Grant
- Patent Title: Solid state light emitting devices including adjustable scotopic / photopic ratio
- Patent Title (中): 固态发光器件,包括可调焦/明光比
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Application No.: US13763576Application Date: 2013-02-08
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Publication No.: US09030103B2Publication Date: 2015-05-12
- Inventor: Paul Kenneth Pickard
- Applicant: Cree, Inc.
- Applicant Address: US NC Durham
- Assignee: Cree, Inc.
- Current Assignee: Cree, Inc.
- Current Assignee Address: US NC Durham
- Agency: Withrow & Terranova, P.L.L.C.
- Agent Vincent K. Gustafson
- Main IPC: H05B37/02
- IPC: H05B37/02 ; H05B33/08

Abstract:
Solid state light emitting devices include multiple LED components separately arranged to generate spectral output having different ratios of scotopic to photopic light (S/P ratios) but similar chromaticities preferably within seven MacAdam ellipses. A light emitting device may be controlled to permit transitioning between different modes of operation of multiple LED components, with aggregated output of different modes having different S/P ratios but similar chromaticities. Multiple LED components of a light emitting device may be simultaneously controlled with different dimming profiles to effect increased color rendering at maximum emissive output of the apparatus, and to effect increased aggregated S/P ratio at minimum emissive output of the device.
Public/Granted literature
- US20140225514A1 SOLID STATE LIGHT EMITTING DEVICES INCLUDING ADJUSTABLE SCOTOPIC / PHOTOPIC RATIO Public/Granted day:2014-08-14
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