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
WO2007014371(A2)
申请公布日期
2007.02.01
申请号
WO2006US29671
申请日期
2006.07.28
申请人
LIGHT PRESCRIPTIONS INNOVATORS, LLC;MINANO, JUAN CARLOS;BENITEZ, PABLO;CHAVES, JULIO;FALICOFF, WAQIDI;PARKYN, WILLIAM, A., JR.
发明人
MINANO, JUAN CARLOS;BENITEZ, PABLO;CHAVES, JULIO;FALICOFF, WAQIDI;PARKYN, WILLIAM, A., JR.