发明授权
- 专利标题: Solid state light emitting devices including adjustable scotopic / photopic ratio
- 专利标题(中): 固态发光器件,包括可调焦/明光比
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申请号: US13763576申请日: 2013-02-08
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公开(公告)号: US09030103B2公开(公告)日: 2015-05-12
- 发明人: Paul Kenneth Pickard
- 申请人: Cree, Inc.
- 申请人地址: US NC Durham
- 专利权人: Cree, Inc.
- 当前专利权人: Cree, Inc.
- 当前专利权人地址: US NC Durham
- 代理机构: Withrow & Terranova, P.L.L.C.
- 代理商 Vincent K. Gustafson
- 主分类号: H05B37/02
- IPC分类号: H05B37/02 ; H05B33/08
摘要:
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.
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