Patent ID: 8028537
Filing Date: 2011-10-04
Classification: F21K,F21V,F21Y,H05K

Abstract:
1. A light fixture for providing general lighting in a region or area intended to be occupied by a person, the fixture comprising: a light transmissive structure forming a volume, the structure having a contoured outer surface and an optical aperture surface, at least an outer peripheral portion of the structure along the contoured surface being substantially rigid; a reflector having a diffusely reflective interior surface extending over at least a substantial portion of the contoured outer surface of the light transmissive structure to form an optical cavity including the volume of the light transmissive structure with an optical aperture at the aperture surface of the light transmissive structure; a flexible circuit board, the flexible circuit board comprising: a plurality of solid state light emitters, for producing light intensity sufficient for a general lighting application of the fixture, at least one of the solid state light emitters being mounted on a first surface of each of the tabs of the flexible circuit board; and a heat sink member having an inner peripheral portion of substantially similar shape and of a size slightly larger than the outer peripheral portion of the light transmissive structure, wherein: the mounting section of the flexible circuit board is mounted on an attachment surface of the heat sink member, the attachment surface of the heat sink member having an inner edge at the inner peripheral portion of the heat sink member; the flexible tabs are bent at a substantial angle with respect to the mounting section of the flexible circuit board, around the inner edge of the attachment surface of the heat sink, by pressure of the solid state emitters mounted on the tabs against the outer peripheral portion along the contoured surface of the light transmissive structure, a second surface of each respective one of the tabs, opposite the first surface of the respective tab, provides heat transfer to the heat sink member, to permit heat transfer from each solid state emitter on each respective tab to the heat sink member; and the tabs hold the light emitters against the outer peripheral portion along the contoured surface of the light transmissive structure in such an orientation that a central axis of emission of each light emitter is at a substantial angle with respect to a perpendicular axis of the aperture surface of the light transmissive structure.