ETENDUE-CONSERVING ILLUMINATION-OPTICS FOR BACKLIGHTS AND FRONTLIGHTS

摘要

A luminance-preserving non-imaging backlight (20) that includes a luminous source emitting light (10), an injector (21), an ejector (23), a CPC profile(21) and microstructured facets (d,dd) that refract upwardly reflected light into a collimated direction common to the facets.