Wavelength conversion component
First Claim
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1. A wavelength conversion component for a light emitting device comprising:
- a light diffusing layer comprising particles of a light scattering material, wherein the light diffusing layer has a shape with an inner surface that defines an interior volume;
a wavelength conversion layer comprising particles of at least one photoluminescence material within the interior volume,wherein the light diffusing layer improves an off-state white appearance of the wavelength conversion component; and
wherein the wavelength conversion component is configured such that in operation a portion of excitation light comprising blue light having a wavelength of greater than or equal to 440 nm generated by the light emitting device is emitted through the wavelength conversion component to contribute to a final visible emission product.
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Abstract
A light emitting device comprises at least one solid-state light source (LED) operable to generate excitation light and a wavelength conversion component located remotely to the at least one source and operable to convert at least a portion of the excitation light to light of a different wavelength. The wavelength conversion component includes a light diffusing layer having particles of a light scattering material, where the light diffusing layer has a shape with an inner surface that defines an interior volume, and a wavelength conversion layer having particles of at least one photoluminescence material within the interior volume.
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Citations
31 Claims
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1. A wavelength conversion component for a light emitting device comprising:
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a light diffusing layer comprising particles of a light scattering material, wherein the light diffusing layer has a shape with an inner surface that defines an interior volume; a wavelength conversion layer comprising particles of at least one photoluminescence material within the interior volume, wherein the light diffusing layer improves an off-state white appearance of the wavelength conversion component; and wherein the wavelength conversion component is configured such that in operation a portion of excitation light comprising blue light having a wavelength of greater than or equal to 440 nm generated by the light emitting device is emitted through the wavelength conversion component to contribute to a final visible emission product. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A light emitting device, comprising:
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at least one solid-state light emitter operable to generate excitation light; and a wavelength conversion component comprising; a light diffusing layer comprising particles of a light scattering material, wherein the light diffusing layer has a shape with an inner surface that defines an interior volume; a wavelength conversion layer comprising particles of at least one photoluminescence material within the interior volume that is excitable by the excitation light, wherein the light diffusing layer improves an OFF state white appearance of the wavelength conversion component; wherein the wavelength conversion component is configured such that in operation a portion of light comprising blue light having a wavelength of greater than or equal to 440 nm generated by the at least one solid-state light emitter is emitted through the wavelength conversion component to contribute to a final visible emission product. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A linear lamp comprising:
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an elongate housing; a plurality of solid-state light emitters housed within the housing and configured along the length of the housing; and an elongate wavelength conversion component remote to the plurality of solid-state light emitters and configured to in part at least define a light mixing chamber, wherein the elongate wavelength conversion component comprises a light diffusing layer comprising particles of a light scattering material, wherein the light diffusing layer has a shape with an inner surface that defines an interior volume; and a wavelength conversion layer comprising particles of at least one photoluminescence material within the interior volume, wherein the light diffusing layer improves an off-state white appearance of the elongate wavelength conversion component; wherein the elongate wavelength conversion component is configured such that in operation a portion of light comprising blue light having a wavelength of greater than or equal to 440 nm generated by the plurality of solid-state light emitters is emitted through the wavelength conversion component to contribute to a visible final emission product.
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30. A downlight comprising:
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a body comprising one or more solid-state light emitters, wherein the body is configured to be positioned within a downlighting fixture such that the downlight emits light in a downward direction; and a wavelength conversion component remote to the one or more solid-state light emitters and configured to in part at least define a light mixing chamber, wherein the wavelength conversion component comprises a light diffusing layer comprising particles of a light scattering material, wherein the light diffusing layer has a shape with an inner surface that defines an interior volume; and a wavelength conversion layer comprising particles of at least one photoluminescence material within the interior volume, wherein the light diffusing layer improves an off-state white appearance of the wavelength conversion component; wherein the wavelength conversion component is configured such that in operation a portion of light comprising blue light having a wavelength of greater than or equal to 440 nm generated by the one or more solid-state light emitters is emitted through the wavelength conversion component to contribute to a final visible emission product.
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31. A light bulb comprising:
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a connector base configured to be inserted in a socket to form an electrical connection for the light bulb; a body comprising one or more solid-state light emitters; a wavelength conversion component having a three dimensional shape that is configured to enclose the one or more solid-state light emitters and to in part at least define a light mixing chamber, wherein the wavelength conversion component comprises a light diffusing layer comprising particles of a light scattering material, wherein the light diffusing layer has a shape with an inner surface that defines an interior volume; and a wavelength conversion layer comprising particles of at least one photoluminescence material within the interior volume, wherein the light diffusing layer improves an off-state white appearance of the wavelength conversion component; wherein the wavelength conversion component is configured such that in operation a portion of light comprising blue light having a wavelength of greater than or equal to 440 nm generated by the one or more solid-state light emitters is emitted through the wavelength conversion component to contribute to a final visible emission product.
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Specification