Phosphors formulation for fluorescent lamps

• US 20050104040A1
• Filed: 12/09/2003
• Published: 05/19/2005
• Est. Priority Date: 11/14/2003
• Status: Abandoned Application

• Current Assignee: Environmental Lighting Concepts, Inc. (Ott-lite Holding Co.)
• Original Assignee: Environmental Lighting Concepts, Inc. (Ott-lite Holding Co.)
• Inventors: Mendelsohn, Fred M.
• Application Number:
  US10/731,798
• Publication Number:
  US 20050104040A1
• Time in Patent Office: Days
• US Class Current: 252/301.40R
• CPC Class Codes: C09K 11/7797 Borates

Abstract

A combination of phosphors formulated to coat the inside of a fluorescent lamp to emit light having a spectral distribution to enhance effective pupil lumen comprising effective amounts of strontium boride, yttrium oxide, barium yttrium, europium, terbium, barium borate and calcium having a peak luminescence in the scotopic range.

Claims

1. A combination of phosphors formulated to coat the inside of a fluorescent lamp to emit light having a spectral distribution to enhance effective pupil lumens comprising effective amounts of two or more of the following:

strontium boride, yttrium oxide, barium yttrium, europium, terbium, barium borate and calcium having a peak luminescence in the scotopic range.

2. The combination of phosphors of claim 1 wherein the power distribution includes a major peak and a minor peak separated by a trough.

3. The combination of phosphors of claim 2 wherein the percentage of power at the major peak is at least 5 times the percentage of power at the trough.

4. The combination of phosphors of claim 3 wherein the percentage of power at the major peak is at least 1.5 times greater than percentage of power at the minor peak.

5. The combination of phosphors of claim 2 wherein the percentage of power at the major peak is at least 1.5 times greater than percentage of power at the minor peak.

6. The combination of phosphors of claim 1 wherein the dominant wave length is from about 505 to about 515 nanometers.

7. The combination of phosphors of claim 1 wherein the scotopic lumen to the photopic lumen ratio is at least 2.25.

8. The combination of phosphors of claim 7 wherein the effective pupil lumens is at least 2.25^0.78 times the photopic lumens measured in the lamp output.

9. The combination of phosphors of claim 8 wherein the effective pupil lumens per watt is at least about 40.

10. The combination of phosphors of claim 7 wherein the effective pupil lumens per watt is at least about 40.

11. The combination of phosphors of claim 1 wherein the effective pupil lumens is at least 2.25^0.78 times the photopic lumens measured in the lamp output.

12. The combination of phosphors of claim 11 wherein the effective pupil lumens per watt is at least about 40.

13. The combination of phosphors of claim 1 wherein the effective pupil lumens per watt is at least about 40.

14. The combination of phosphors of claim 1 wherein the scotopic lumen to the photopic lumen ratio is about 2.25.

15. The combination of phosphors of claim 14 wherein the effective pupil lumens is 2.3^0.78 times the photopic lumens measured in the lamp output 0.

16. The combination of phosphors of claim 15 where the effective pupil lumens per watt is about 45.

17. The combination of phosphors of claim 14 wherein the effective pupil lumens is 2.3^0.78 times the photopic lumens measured in the lamp output.

18. The combination of phosphors of claim 1 wherein the effective pupil lumens is 2.3^0.78 times the photopic lumens measured in the lamp output.

19. The combination of phosphors of claim 18 wherein the effective pupil lumens per watt is about 45.

20. The combination of phosphors of claim 1 wherein the effective pupil lumens per watt is about 45.

21. The combination of phosphors of claim 1 wherein the percentages by weight of the combination of phosphors are about 46 percent strontium boride, about 24 percent each of yttrium oxide and barium yttrium oxide, about 2 percent each of europium and terbium, and about 1 percent each of barium borate and calcium.

22. The combination of phosphors of claim 1 wherein the percentages by weight of the combination of phosphors are at least about 40 percent strontium boride, at least about 20 percent each of yttrium oxide and barium yttrium oxide, at least about 2 percent of europium and terbium, and at least about 1 percent of barium borate and calcium.

23. The combination of phosphors of claim 2 wherein the major peak is between about 540 and about 550 nanometers.

24. The combination of phosphors of claim 23 wherein the minor peak is between about 480 and about 500 nanometers.

25. The combination of phosphors of claim 24 wherein the trough is between about 560 and about 605 nanometers.

26. The combination of phosphors of claim 2 wherein the minor peak is between about 480 and about 500 nanometers.

27. The combination of phosphors of claim 26 wherein the trough is between about 560 and about 605 nanometers.

28. The combination of phosphors of claim 2 wherein the trough is between about 560 and about 605 nanometers.