Phosphor tape article
First Claim
1. A phosphor tape article, comprising:
- a phosphor layer comprising a phosphor and a polymeric binder material, the phosphor having a decay rate of less than 1 second;
a pressure sensitive adhesive layer disposed adjacent the phosphor layer, such that light transmitted through the pressure sensitive adhesive layer is received by the phosphor layer; and
a release liner disposed on the pressure sensitive adhesive layer, wherein the pressure sensitive adhesive layer is disposed between the release liner and the phosphor layer;
wherein the phosphor tape article is divided into discrete pieces whose size and shape are suitable for covering encapsulated LEDs.
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Accused Products
Abstract
A phosphor tape article includes a phosphor layer having a phosphor and a polymeric binder material, a pressure sensitive adhesive layer disposed adjacent the phosphor layer such that light transmitted through the pressure sensitive adhesive layer is received by the phosphor layer, and a release liner disposed on the pressure sensitive adhesive layer. The pressure sensitive adhesive layer is disposed between the release liner and the phosphor layer. The phosphor is suitable for excitation by UV or blue LED light, and the phosphor emission has a characteristic decay rate of less than 1 second. Light emitting devices including pieces of phosphor tape, and methods of making such devices, are also disclosed.
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Citations
19 Claims
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1. A phosphor tape article, comprising:
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a phosphor layer comprising a phosphor and a polymeric binder material, the phosphor having a decay rate of less than 1 second; a pressure sensitive adhesive layer disposed adjacent the phosphor layer, such that light transmitted through the pressure sensitive adhesive layer is received by the phosphor layer; and a release liner disposed on the pressure sensitive adhesive layer, wherein the pressure sensitive adhesive layer is disposed between the release liner and the phosphor layer; wherein the phosphor tape article is divided into discrete pieces whose size and shape are suitable for covering encapsulated LEDs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light emitting device, comprising:
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an encapsulated LED that includes an ultraviolet or blue light emitting LED die disposed within a transparent encapsulating material; and a phosphor tape disposed on the transparent encapsulating material, wherein the phosphor tape comprises; a phosphor layer including a phosphor and a polymeric binder material; and a pressure sensitive adhesive layer disposed adjacent the phosphor layer, wherein the pressure sensitive layer is disposed between the phosphor layer and the transparent encapsulating material and contacts the transparent encapsulating material. - View Dependent Claims (11, 12, 13, 14)
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15. A method of making a light emitting device, comprising:
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providing a phosphor tape sheet comprising a phosphor layer including a phosphor and a polymeric binder material, and a pressure sensitive adhesive layer adjacent the phosphor layer, the phosphor tape sheet being divided into discrete phosphor tape articles; providing an encapsulated LED including an LED die disposed within a transparent encapsulating material, the transparent encapsulating material having an encapsulant surface; and adhering one of the phosphor tape articles to the encapsulant surface. - View Dependent Claims (16, 17, 18, 19)
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Specification