Remote-phosphor LED downlight
First Claim
Patent Images
1. A luminaire comprising:
- one or more blue LED chips;
a collimator operative on the emitted light of said chips to produce collimated light;
a phosphor situated at a distance from said LED chips such that said collimated light illuminates said phosphor; and
a beam-forming reflector surrounding said phosphor and arranged to produce an output beam of light from the phosphor past the LED chips.
3 Assignments
0 Petitions
Accused Products
Abstract
An embodiment of a collimating downlight has front-mounted blue LED chips facing upwards, having a heat sink on the back of the LED chips exposed in ambient air. The LED chips are mounted in a collimator that sends their blue light to a remote phosphor situated near the top of the downlight can. Surrounding the remote phosphor is a downward-facing reflector that forms a beam from its stimulated emission and reflected blue light. The phosphor thickness and composition can be adjusted to give a desired color temperature.
-
Citations
20 Claims
-
1. A luminaire comprising:
-
one or more blue LED chips; a collimator operative on the emitted light of said chips to produce collimated light; a phosphor situated at a distance from said LED chips such that said collimated light illuminates said phosphor; and a beam-forming reflector surrounding said phosphor and arranged to produce an output beam of light from the phosphor past the LED chips. - View Dependent Claims (2)
-
-
3. A luminaire comprising:
-
a housing with an open end and a closed end; a phosphor patch in the closed end of the housing; a light source spaced from the phosphor patch in the direction from the closed end of the housing to the open end of the housing, and arranged to emit light so as to illuminate said phosphor patch; wherein light from said phosphor patch is emitted through the open end of the housing past the light source. - View Dependent Claims (4, 5, 6, 7, 8, 9)
-
-
10. A luminaire comprising:
-
a shroud having an open end and a closed end; an opaque reflector in the closed end of the shroud; a phosphor patch in the closed end of the shroud, between the opaque reflector and the closed end of the shroud; a light source in the open end of the shroud, operative to direct onto the phosphor patch light of a frequency effective to excite the phosphor patch; wherein light from the phosphor patch exits through the open end of the shroud past the light source. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification