Wavelength conversion component with a diffusing layer
DCFirst Claim
1. A wavelength conversion component for a light emitting device comprising:
- a wavelength conversion layer comprising particles of at least one photoluminescence material; and
a light diffusing layer comprising particles of a light scattering material,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 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.
4 Assignments
Litigations
0 Petitions
Accused Products
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 transmissive substrate having a wavelength conversion layer comprising particles of at least one photoluminescence material and a light diffusing layer comprising particles of a light diffractive material. This approach of using the light diffusing layer in combination with the wavelength conversion layer solves the problem of variations or non-uniformities in the color of emitted light with emission angle.
175 Citations
29 Claims
-
1. A wavelength conversion component for a light emitting device comprising:
-
a wavelength conversion layer comprising particles of at least one photoluminescence material; and a light diffusing layer comprising particles of a light scattering material, 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 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. A light emitting device, comprising:
-
at least one solid-state light emitter operable to generate excitation light; and a wavelength conversion component comprising; a wavelength conversion layer excitable by the excitation light, wherein the wavelength conversion layer comprises particles of at least one photoluminescence material; and a light diffusing layer comprising particles of a light scattering material, 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 (20, 21, 22, 23, 24, 25, 26)
-
-
27. A linear lamp comprising:
-
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 wavelength conversion layer comprising particles of at least one photoluminescence material and a light diffusing layer comprising particles of a light scattering material, 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.
-
-
28. A downlight comprising:
-
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 wavelength conversion layer comprising particles of at least one photoluminescence material and a light diffusing layer comprising particles of a light scattering material, 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.
-
-
29. A light bulb comprising:
-
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 wavelength conversion layer comprising particles of at least one photoluminescence material and a light diffusing layer comprising particles of a light scattering material, 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.
-
Specification