Wavelength conversion component with improved protective characteristics for remote wavelength conversion

• US 9,115,868 B2
• Filed: 10/13/2011
• Issued: 08/25/2015
• Est. Priority Date: 10/13/2011
• Status: Active Grant

• Current Assignee: Intematix Corporation
• Original Assignee: Intematix Corporation
• Inventors: Deeman, Neil, Dai, Bing, Edwards, Charles
• Primary Examiner(s): Neils, Peggy
• Application Number:
  US13/273,196
• Publication Number:
  US 20130094176A1
• Time in Patent Office: 1,412 Days
• Field of Search: 362/84, 362/213, 362/249.02, 362/231, 362/260, 362/293
• US Class Current: 1/1
• CPC Class Codes: F21V 13/08 the elements being filters or photoluminescent elements and reflectors
• CPC Class Codes: F21V 9/06 for filtering out ultraviolet radiation
• CPC Class Codes: F21V 9/32 characterised by the arrangement of the photoluminescent material
• CPC Class Codes: F21V 9/38 Combination of two or more photoluminescent elements of different materials
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body

Abstract

A wavelength conversion component for remote wavelength conversion is described in which a wavelength conversion layer is sandwiched between two light transmissive hermetic substrates. The light transmissive hermetic substrates form a barrier that protects the wavelength conversion layer from exposure to external environmental conditions. In some approaches, the wavelength conversion component further includes a sealant material disposed around an outer edge of the sandwich structure, where the sealant material hermetically seals an outer edge wavelength conversion layer.

Claims

1. 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;

an elongate first light transmissive hermetic substrate;

an elongate second light transmissive hermetic substrate; and

an elongate wavelength conversion layer located between the elongate first light transmissive hermetic substrate and the elongate second light transmissive hermetic substrate, such that the elongate first light transmissive hermetic substrate and the elongate second light transmissive hermetic substrate form a barrier to a first surface and a second surface of the elongate wavelength conversion layer, wherein the elongate wavelength conversion layer comprises a mixture of a light transmissive carrier material and a photoluminescent material, the light transmissive carrier material being a different material from the first and second light transmissive hermetic substrates, and having substantially the same index of refraction as the first and second light transmissive hermetic substrates, and

wherein the elongate wavelength conversion component has a configuration forming a shell with an inner surface that defines an interior volume.

2. The linear lamp in claim 1, wherein the first light transmissive hermetic substrate and the second light transmissive hermetic substrate are configured to filter UV light.

3. The linear lamp in claim 1, wherein the wavelength conversion layer includes a layer of a light transmissive carrier material.

4. The linear lamp of claim 1, wherein the elongate first light transmissive hermetic substrate and the elongate second light transmissive hermetic substrate are in direct contact with the first surface and the second surface of the elongate wavelength conversion layer.

5. The linear lamp of claim 1, wherein the elongate first light transmissive hermetic substrate and the elongate second light transmissive hermetic substrate are composed of the same material.

6. The linear lamp of claim 5, wherein the material is selected from the group consisting of glass and sapphire.

7. The linear lamp of claim 1, wherein the elongate first light transmissive hermetic substrate is composed of glass and the elongate second light transmissive hermetic substrate is composed of sapphire.

8. The linear lamp of claim 1 , wherein the elongate first light transmissive hermetic substrate and the elongate second light transmissive hermetic substrate have substantially the same coefficient of thermal expansion.

9. The linear lamp of claim 1, wherein

the elongate wavelength conversion layer is formed as a deposition on the elongate first light transmissive hermetic substrate;

and

the elongate first light transmissive hermetic substrate, the elongate wavelength conversion layer, and the elongate second light transmissive hermetic substrate are cured components.

10. The linear lamp of claim 1, wherein

the elongate wavelength conversion layer is cured prior to placing the elongate second light transmissive hermetic substrate on the elongate wavelength conversion layer.

11. The linear lamp of claim 1, wherein the elongate wavelength conversion layer corresponds to a deposit of material using a method selected from the group consisting of:

screen printing, slot die coating, spin coating, roller coating, drawdown coating and doctor blading.

12. The linear lamp of claim 9, wherein the elongate wavelength conversion layer between the elongate first light transmissive hermetic substrate and the elongate second light transmissive hermetic substrate was laminated before curing.

13. The linear lamp of claim 12, wherein the elongate wavelength conversion layer was laminated based on hot laminating or cold laminating.