发明名称 |
Etendue-conserving illumination-optics for backlights and frontlights |
摘要 |
Some embodiments provide luminance-preserving non-imaging backlights that comprise a luminous source emitting light, an input port that receives the light, an injector and a beam-expanding ejector. The injector includes the input port and a larger output port with a profile that expands away from the input port acting via total internal reflection to keep x-y angular width of the source image inversely proportional to its luminance. The injector is defined by a surface of revolution with an axis on the source and a swept profile that is a first portion of an upper half of a CPC tilted by its acceptance angle. The beam-expanding ejector comprising a planar waveguide optically coupled to the output port of the injector. The ejector includes a smooth upper surface, and a reflective lower surface comprising microstructured facets that refract upwardly reflected light into a collimated direction common to the facets. |
申请公布号 |
US8393777(B2) |
申请公布日期 |
2013.03.12 |
申请号 |
US20060997143 |
申请日期 |
2006.07.28 |
申请人 |
MINANO JUAN CARLOS;BENITEZ PABLO;CHAVES JULIO CESAR;FALICOFF WAQIDI;PARKYN WILLIAM A.;LIGHT PRESCRIPTIONS INNOVATORS, LLC |
发明人 |
MINANO JUAN CARLOS;BENITEZ PABLO;CHAVES JULIO CESAR;FALICOFF WAQIDI;PARKYN WILLIAM A. |
分类号 |
F21V8/00 |
主分类号 |
F21V8/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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