Claims
- 1. A garnet phosphor having the following composition:
- 2. A garnet phosphor according to claim 1 wherein Re is selected from the group consisting of yttrium and gadolinium.
- 3. A garnet phosphor according to claim 1 wherein x is from about 0.01 to about 1%.
- 4. A garnet phosphor according to claim 1 wherein M is selected from the group consisting of alkali and alkaline earth metals.
- 5. A garnet phosphor according to claim 4 wherein M is barium.
- 6. A method of making a phosphor slurry comprising making a solution of a polymer or polymerizable material in a dispersion liquid, cooling it, adding a YAG:Ce phosphor powder and shaking to form a uniform slurry.
- 7. A method according to claim 6 wherein the phosphor particles are from 1-15 microns in size.
- 8. A method according to claim 6 wherein the polymerizable material is polyvinyl alcohol.
- 9. A method according to claim 6 wherein the dispersion liquid is water.
- 10. A method according to claim 6 wherein the polymerizable material is heated to polymerize it.
- 11. A method according to claim 6 wherein the polymerizable material is polymerized with light.
- 12. A white light source comprising a blue-emitting LED coated with a layer of the phosphor of claim 1 embedded in a polymer.
- 13. A white light source comprising an ultraviolet light LED combined with red, green and blue emitting phosphors, wherein the green emitting phosphor has the formula of claim 1.
- 14. A method of making a white light source comprising
a) forming a slurry of a phosphor of claim 1 in a binder solution comprising a polymerizable material in a dispersion liquid in which the polymerizable material is soluble; b) mounting one or more semiconductor light emitting diodes that emit blue light on a frame; c) coating the light emitting diodes with a predetermined amount of the phosphor slurry; and d) polymerizing the polymerizable material.
- 15. A method according to claim 14 wherein the polymerizable material is polyvinyl alcohol.
- 16. A method according to claim 14 wherein the polymerizable material is polymerized with heat.
- 17. A method according to claim 16 wherein the polyvinyl alcohol is polymerized by heating at about 130° C.
- 18. A method according to claim 14 wherein the polymerizable material is polymerized by photoinitiation.
Parent Case Info
[0001] This application claims priority from Provisional Application Serial No. 60/451,737 filed Mar. 4, 2003.
Provisional Applications (1)
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Number |
Date |
Country |
|
60451737 |
Mar 2003 |
US |