Lighting devices having remote lumiphors that are excited by lumiphor-converted semiconductor excitation sources
First Claim
1. A lighting device, comprising:
- a plurality of semiconductor light emitting devices, wherein at least some of the semiconductor light emitting devices include a respective associated first lumiphor that has a first surface that is positioned to receive radiation emitted by its associated semiconductor light emitting device;
a second lumiphor that is different from the first lumiphors, the second lumiphor positioned to receive radiation emitted by the semiconductor light emitting devices and being spaced-apart from the first lumiphors;
wherein the ratio of average particle size of the luminescent materials in at least one of the first lumiphors to average particle size of the luminescent materials in the second lumiphor is at least 4;
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Accused Products
Abstract
Lighting devices include a semiconductor light emitting device and first and second spaced-apart lumiphors. The first lumiphor has a first surface that is positioned to receive radiation emitted by the semiconductor light emitting device and a second surface opposite the first surface. The second lumiphor has a first surface that is positioned to receive radiation emitted by the semiconductor light emitting device and radiation emitted by the luminescent materials in the first lumiphor. The first lumiphor is a leaky lumiphor in that the luminescent materials therein wavelength convert less than 90% of the radiation from the semiconductor light emitting device light that is incident on the first lumiphor.
203 Citations
20 Claims
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1. A lighting device, comprising:
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a plurality of semiconductor light emitting devices, wherein at least some of the semiconductor light emitting devices include a respective associated first lumiphor that has a first surface that is positioned to receive radiation emitted by its associated semiconductor light emitting device; a second lumiphor that is different from the first lumiphors, the second lumiphor positioned to receive radiation emitted by the semiconductor light emitting devices and being spaced-apart from the first lumiphors; wherein the ratio of average particle size of the luminescent materials in at least one of the first lumiphors to average particle size of the luminescent materials in the second lumiphor is at least 4;
1. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A lighting device, comprising:
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a first light emitting diode that emits blue light, the first light emitting diode including an associated first lumiphor that has a first surface that is positioned to receive radiation emitted by the first light emitting diode; a second light emitting diode that emits blue light, the second light emitting diode including an associated second lumiphor that has a first surface that is positioned to receive radiation emitted by the second light emitting diode; and a third lumiphor that is spaced-apart from both the first and second lumiphors and positioned to receive radiation emitted by the first and second light emitting diodes and by the first and second lumiphors. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A lighting device, comprising:
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a plurality of semiconductor light emitting devices that emit blue light, wherein at least first and second of the semiconductor light emitting devices include respective associated first lumiphors that each have a first surface that is positioned to receive radiation emitted by its associated semiconductor light emitting device; a second lumiphor that is different from the first lumiphors, the second lumiphor . positioned to receive radiation emitted by the first and second of the plurality of semiconductor light emitting devices and being spaced-apart from the respective first lumiphors associated with the first and second of the semiconductor light emitting devices; wherein the ratio of average particle size of the luminescent materials in at least one of the first lumiphors to average particle size of the luminescent materials in the second lumiphor is at least 4;
1. - View Dependent Claims (18, 19, 20)
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Specification