Solid-state light emitting devices and signage with photoluminescence wavelength conversion
First Claim
1. A light emitting device comprising:
- at least one solid-state light emitter operable to generate excitation light, wherein the excitation light comprises blue light having a wavelength of greater than or equal to 440 nm; and
a photoluminescence wavelength conversion component comprising a mixture of particles of at least one photoluminescence material and particles of a light reflective material, wherein the photoluminescence wavelength conversion component is configured such that in operation a portion of the excitation light generated by the at least one solid-state light emitter is emitted through the photoluminescence wavelength conversion component to contribute to the a final visible emission product.
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Accused Products
Abstract
A solid-state light emitting device having a solid-state light emitter (LED) operable to generate excitation light and a wavelength conversion component including a mixture of particles of a photoluminescence material and particles of a light reflective material. In operation the phosphor absorbs at least a portion of the excitation light and emits light of a different color. The emission product of the device comprises the combined light generated by the LED and the phosphor. The wavelength conversion component can be light transmissive and comprise a light transmissive substrate on which the mixture of phosphor and reflective materials is provided as a layer or homogeneously distributed throughout the volume of the substrate. Alternatively the wavelength conversion component can be light reflective with the mixture of phosphor and light reflective materials being provided as a layer on the light reflective surface.
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Citations
24 Claims
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1. A light emitting device comprising:
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at least one solid-state light emitter operable to generate excitation light, wherein the excitation light comprises blue light having a wavelength of greater than or equal to 440 nm; and a photoluminescence wavelength conversion component comprising a mixture of particles of at least one photoluminescence material and particles of a light reflective material, wherein the photoluminescence wavelength conversion component is configured such that in operation a portion of the excitation light generated by the at least one solid-state light emitter is emitted through the photoluminescence wavelength conversion component to contribute to the a final visible emission product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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- 16. A wavelength conversion component for a solid-state light emitting device comprising a mixture of particles of at least one photoluminescence material and particles of a light reflective material, wherein the wavelength conversion component is configured such that in operation a portion of an excitation light is emitted through the wavelength conversion component to contribute to the a final visible emission product, wherein the excitation light comprises blue light having a wavelength of greater than or equal to 440 nm.
Specification