Led lighting arrangement including light emitting phosphor and method of manufacture

Abstract

An optical component for an LED lighting arrangement comprises a transparent material having a surface and one or more photoluminescent (phosphor) materials deposited as a layer on the surface of the transparent material. The phosphor material layer can be deposited using a deposition approach including spraying, dropping, printing, painting, spin coating or tape casting. The phosphor material layer has a thickness in a range of 20 to 500 μm. The component can further comprising a light diffusing material which can be provided in a separate layer from the phosphor material layer or provided in the phosphor material layer. The light diffusing material can be deposited using a deposition approach including spraying, dropping, printing, painting, spin coating or tape casting.

1 . An optical component comprising:
 a transparent material,   a surface of the transparent material; and   at least one photoluminescent material deposited as a layer on the surface of the transparent material using a deposition approach selected from the group consisting of: spraying; dropping; printing; painting; spin coating; and tape casting.   
     
     
         2 . The component of  claim 1 , wherein the photoluminescent material layer has a thickness in a range of 20 to 500 μm. 
     
     
         3 . The component of  claim 1 , wherein the transparent material has a concave surface and wherein the photoluminescent material layer is provided on at least a part of the concave surface. 
     
     
         4 . The component of  claim 1 , wherein the transparent material has a convex surface and wherein the photoluminescent material layer is provided on at least a part of the convex surface. 
     
     
         5 . The component of  claim 1 , wherein the transparent material comprises a substantially spherical shell and wherein the photoluminescent material layer is provided on at least a part of the inner or outer surfaces of the transparent material. 
     
     
         6 . The component of  claim 1 , wherein the transparent material comprises a hollow cylinder and wherein the photoluminescent material layer is provided on at least a part of the inner or outer surfaces of the transparent material. 
     
     
         7 . The component of  claim 1 , wherein the transparent material comprises a substantially hemispherical shell and wherein the photoluminescent material layer is provided on at least a part of the inner or outer surfaces of the transparent material. 
     
     
         8 . The component of  claim 1 , wherein the component is selected from the group consisting of: a lens; an optical window; and a waveguide. 
     
     
         9 . The component of  claim 1 , wherein the photoluminescent material layer comprises a mixture of a transparent material and the at least one photoluminescent material. 
     
     
         10 . The component of  claim 9 , wherein the transparent material is selected from the group consisting of: an epoxy; a silicone; a polymer; and a glass. 
     
     
         11 . The component of  claim 1 , and further comprising a light diffusing material. 
     
     
         12 . The component of  claim 11 , wherein the light diffusing material is provided in a separate layer from the photoluminescent material layer. 
     
     
         13 . The component of  claim 11 , wherein the light diffusing material is provided in the photoluminescent material layer. 
     
     
         14 . The component of  claim 11 , wherein the light diffusing material is selected from the group consisting of: titanium dioxide; silica, alumina; and combinations thereof. 
     
     
         15 . The component of  claim 11 , wherein the light diffusing material is deposited using a deposition approach selected from the group consisting of: spraying; dropping; printing; painting; spin coating; and tape casting. 
     
     
         16 . The component of  claim 1 , wherein the at least one photoluminescent material is selected from the group consisting of: a YAG-based phosphor; a silicate-based phosphor; a nitride-based phosphor; a sulfate-based phosphor; and combinations thereof. 
     
     
         17 . An LED lighting arrangement comprising at least one LED and an optical component comprising a transparent material; a surface of the transparent material; and at least one photoluminescent material deposited as a layer on the surface of the transparent material using a deposition approach selected from the group consisting of: spraying; dropping; printing; painting; spin coating; and tape casting. 
     
     
         18 . The lighting arrangement of  claim 17 , wherein the layer of the at least one photoluminescent material has a thickness in a range of 20 to 500 μm. 
     
     
         19 . The lighting arrangement of  claim 17 , wherein the photoluminescent material layer is provided on at least a part of a surface of the transparent material selected from the group consisting of: a concave surface; a convex surface; a planar surface; and combinations thereof. 
     
     
         20 . The lighting arrangement of  claim 17 , and further comprising a light diffusing material. 
     
     
         21 . The lighting arrangement of  claim 20 , wherein the light diffusing material is provided in a separate layer from the photoluminescent material layer. 
     
     
         22 . The lighting arrangement of  claim 20 , wherein the light diffusing material is provided in the photoluminescent material layer. 
     
     
         23 . The lighting arrangement of  claim 20 , wherein the light diffusing material is selected from the group consisting of: titanium dioxide; silica, alumina; and combinations thereof. 
     
     
         24 . The lighting arrangement of  claim 20 , wherein the light diffusing material is deposited using a deposition approach selected from the group consisting of: spraying; dropping; printing; painting; spin coating; and tape casting. 
     
     
         25 . The lighting arrangement of  claim 17 , wherein the component is selected from the group consisting of: a lens; an optical window; and a waveguide. 
     
     
         26 . A method of fabricating an optical component comprising:
 providing a transparent material having a surface; and   depositing at least one photoluminescent material as a layer on the surface of the transparent material using a deposition approach selected from the group consisting of: spraying; dropping; printing; painting; spin coating; and tape casting.   
     
     
         27 . The method of  claim 26 , and comprising depositing the layer of the at least one photoluminescent material with a thickness in a range of 20 to 500 μm. 
     
     
         28 . The method of  claim 25 , and further comprising depositing a light diffusing material. 
     
     
         29 . The method of  claim 28 , and comprising depositing the light diffusing material in a separate layer from the photoluminescent material layer. 
     
     
         30 . The method of  claim 26 , and comprising depositing the light diffusing material in a common layer with the at least one photoluminescent material. 
     
     
         31 . The method of  claim 26 , and comprising depositing the light diffusing material using a deposition approach selected from the group consisting of: spraying; dropping; printing; painting; spin coating; and tape casting.