Solid-state luminaires for general illumination
DCFirst Claim
1. A lighting panel, comprising:
- at least one substrate having a first side parallel to a principal plane of the lighting panel;
a plurality of solid state lighting devices arranged on the first side of the at least one substrate and configured to emit light;
a reflector on the first side of the at least one substrate;
a brightness enhancement film on the reflector, wherein the reflector is arranged between the at least one substrate and the brightness enhancement film and the brightness enhancement film is configured to preferentially emit light having a first orientation from the lighting panel and to preferentially reflect light having a second orientation, different from the first orientation, back into the lighting panel, anda generally planar diffuser sheet between the reflector and the brightness enhancement film, wherein the light having the second orientation that is reflected back into the lighting panel is recycled within at least the diffuser sheet.
2 Assignments
Litigations
1 Petition
Accused Products
Abstract
A lighting panel includes a tile having a first side parallel to a principal plane of the lighting panel, a plurality of solid state lighting devices arranged on the first side of the tile and configured to emit light, a reflector sheet on the first side of the tile, and a brightness enhancement film on the reflector sheet. The reflector sheet may be arranged between the tile and the brightness enhancement film and the brightness enhancement film may be configured to increase the on-axis intensity of emitted light. A luminaire adapted for general illumination includes a lighting panel as described above, a current supply circuit configured to supply an on-state drive current to a string of lighting devices in response to a control signal, a photosensor arranged to receive light from one of the solid state lighting devices, and a control system configured to receive an output signal from the photosensor and to adjust the control signal responsive to the output signal of the photosensor.
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Citations
20 Claims
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1. A lighting panel, comprising:
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at least one substrate having a first side parallel to a principal plane of the lighting panel; a plurality of solid state lighting devices arranged on the first side of the at least one substrate and configured to emit light; a reflector on the first side of the at least one substrate; a brightness enhancement film on the reflector, wherein the reflector is arranged between the at least one substrate and the brightness enhancement film and the brightness enhancement film is configured to preferentially emit light having a first orientation from the lighting panel and to preferentially reflect light having a second orientation, different from the first orientation, back into the lighting panel, and a generally planar diffuser sheet between the reflector and the brightness enhancement film, wherein the light having the second orientation that is reflected back into the lighting panel is recycled within at least the diffuser sheet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A luminaire adapted for general illumination, the luminaire comprising:
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a lighting panel including at least one substrate, a plurality of solid state lighting devices electrically connected in a string and arranged on a first side of the at least one substrate and configured to emit light at a dominant wavelength, a reflector on the first side of the at least one substrate, wherein the reflector is configured to reflect and scatter light incident thereon, and a brightness enhancement film on the reflector, wherein a longitudinal side of the at least one substrate defines a principal plane of the lighting panel, and the reflector is arranged between the at least one substrate and the brightness enhancement film such that a longitudinal side of the reflector extends along the principal plane of the lighting panel; a current supply circuit configured to supply an on-state drive current to the string in response to a control signal; a photosensor arranged to receive light from at least one of the plurality of solid state lighting devices; and a control system configured to receive an output signal from the photosensor and to adjust the control signal responsive to the output signal of the photosensor to thereby adjust an average current supplied to the string by the current supply circuit. - View Dependent Claims (19, 20)
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Specification