LED-BASED DIRECT-VIEW LUMINAIRE WITH UNIFORM MIXING OF LIGHT OUTPUT

摘要

Methods and apparatus are provided for producing mixed light in a direct-view luminaire. The luminaire includes a plurality of light sources (132) that, in combination, are configured to generate a plurality of different colors of light, a first light mixing chamber (110) and at least one second light mixing chamber (120) in light communication with the first mixing chamber through at least one opening (134). At least one directly viewable light exit surface (112) is coupled to the first light mixing chamber. The light sources are contained in the second light mixing chamber(s), which is configured to prevent light emitted from the light sources from directly impinging on the light exit surface(s). The first light mixing chamber and the light exit surface(s) are configured to mix the light emitted from the light sources such that all light exiting the light exit surface(s) is substantially uniform in brightness and color.

主权项

1. A luminaire, comprising:
a plurality of light sources configured to, in combination, generate a plurality of different colors of light; a first chamber configured to mix the plurality of different colors of light; at least one light exit surface coupled to the first chamber and configured to further mix light emitted from the plurality of light sources; and a second chamber containing the plurality of light sources and having at least one wall and an opening in communication with the first chamber, the at least one wall configured to prevent the light emitted from the plurality of light sources from directly impinging upon the at least one light exit surface, and the opening configured to permit the light emitted from the plurality of light sources to travel through the opening from the second chamber to the first chamber, wherein the first chamber and the at least one light exit surface are configured together to mix the light emitted from the plurality of light sources such that all light exiting the at least one light exit surface is substantially uniform in brightness and/or color.