Ballast system for a fluorescent lamp

• US 6,528,955 B1
• Filed: 03/30/2000
• Issued: 03/04/2003
• Est. Priority Date: 03/30/2000
• Status: Expired due to Fees

• Current Assignee: O2100, Inc.
• Original Assignee: Q2100, Inc.
• Inventors: Lattis, Mathew C., Powers, Galen R.
• Primary Examiner(s): Wong, Don
• Assistant Examiner(s): Vo, Tuyet T.
• Application Number:
  US09/539,631
• Time in Patent Office: 1,069 Days
• Field of Search: 315/291, 315/309, 315/46, 315/49, 315/DIG.5, 315/66, 315/68, 315/94, 315/105, 315/106, 315/116, 315/107
• US Class Current: 315/291
• CPC Class Codes: B29C 39/24 Feeding the material into the mould
• CPC Class Codes: B29C 39/38 Heating or cooling
• CPC Class Codes: B29C 39/44 Measuring, controlling or regulating
• CPC Class Codes: B29D 11/00413 made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges B29D11/00019 - B29D11/00355, B29D11/00423, B29D11/00432 take precedence
• CPC Class Codes: B29D 11/00442 Curing the lens material
• CPC Class Codes: B29D 11/00528 Consisting of two mould halves joined by an annular gasket
• CPC Class Codes: H05B 41/2988 for protecting the lamp against abnormal operating conditions

Abstract

A flasher ballast system includes a high frequency instant start ballast and one or more transformers. The high frequency instant start ballast may provide the strike voltage and perform the current limiting functions for a fluorescent lamp. The transformers may be electrically coupled to one or both of the filaments of a fluorescent lamp to provide a low voltage to the filaments.

Claims

1. A ballast system for controlling the operation of a fluorescent lamp, comprising:

an instant start ballast, wherein the instant start ballast is configured to deliver a striking voltage to the fluorescent lamp, and wherein the instant start ballast is further configured to regulate the current to the fluorescent lamp when the fluorescent lamp is on; and

a transformer, wherein the transformer is configured to deliver voltage to a filament of the fluorescent lamp when the fluorescent lamp is off; and

wherein the fluorescent lamp is disposed within a lens forming apparatus.

2. The ballast system of claim 1, wherein the instant start ballast is configured to apply a striking voltage of between about 250 to about 400 V.

3. The ballast system of claim 1, wherein the voltage supplied by the transformer is sufficient to keep the filament o the fluorescent lamp at a temperature proximate the optimal operating temperature of the filament.

4. The ballast system of claim 1, wherein the voltage supplied by the transformer is sufficient to keep the fluorescent lamp at a temperature proximate the optimal operating temperature of the fluorescent lamp.

5. The ballast system of claim 1, wherein the transformer is a toroidal transformer.

6. The ballast system of claim 1, wherein the transformer and the instant start ballast are independently operable.

7. The ballast system of claim 1, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to independently operate the instant start ballast and the transformer.

8. The ballast system of claim 1, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to independently operate the instant start ballast and the transformer, and wherein the controller is further configured to turn the transformer off before turning the instant start ballast on.

9. The ballast system of claim 1, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to independently operate the instant start ballast and the transformer, and wherein the controller is further configured to turn the transformer on when the lamp is turned off.

10. The ballast system of claim 1, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to turn the transformer off after a predetermined amount of time has passed without receiving a signal to turn the fluorescent lamp on.

11. The ballast system of claim 1, wherein the transformer is configured to apply less than about 5 V to the filament.

12. The ballast system of claim 1, wherein the instant start ballast is a high frequency ballast.

13. A method of operating a fluorescent lamp, comprising:

coupling the fluorescent lamp to a ballast system, the ballast system comprising;

an instant start ballast, wherein the instant start ballast is configured to deliver a striking voltage to the fluorescent lamp, and wherein the instant start ballast is further configured to regulate the current to the fluorescent lamp when the fluorescent lamp is on; and

a transformer, wherein the transformer is configured to deliver voltage to a filament of the fluorescent lamp when the fluorescent lamp is off;

operating the transformer such that voltage is delivered to the filament of the fluorescent lamp;

operating the instant start ballast such that a striking voltage is applied to the fluorescent lamp causing the fluorescent lamp to produce light; and

directing light from the fluorescent lamp to a mold assembly within a lens forming apparatus.

14. The method of claim 13, wherein the instant start ballast is configured to apply a striking voltage of between about 250 to about 400 V.

15. The method of claim 13, the voltage supplied by the transformer is sufficient to keep the filament of the fluorescent lamp at a temperature proximate the optimal operating temperature of the filament.

16. The method of claim 13, wherein the voltage supplied by the transformer is sufficient to keep the fluorescent lamp at a temperature proximate the optimal operating temperature of the fluorescent lamp.

17. The method of claim 13, wherein the transformer is a toroidal transformer.

18. The method of claim 13, wherein the transformer and the instant start ballast are independently operable.

19. The method of claim 13, wherein the ballast system further comprises a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to independently operate the instant start ballast and the transformer.

20. The method of claim 13, further comprising turning off the transformer prior to operating the instant start ballast.

21. The method of claim 13, wherein the transformer is configured to apply less than about 5 V to the filament.

22. The method of claim 13, wherein the instant start ballast is a high frequency ballast.

23. An apparatus for preparing an eyeglass lens, comprising:

a first lens curing unit, wherein the first lens curing unit comprises a fluorescent lamp, wherein activating light produced by the fluorescent lamp is directed toward a mold assembly during use; and

a ballast system to control the fluorescent lamp, wherein the ballast system comprises an instant start ballast and a transformer, wherein the instant start ballast is configured to deliver a striking voltage to the fluorescent lamp; and

wherein the instant start ballast is further configured to regulate the current to the fluorescent lamp when the fluorescent lamp is on; and

wherein the transformer is configured to deliver voltage to a filament of the fluorescent lamp when the fluorescent lamp is off.

24. The apparatus of claim 23, wherein a substantially clear eyeglass lens is formed in a time period of less than about 1 hour.

25. The apparatus of claim 23, further comprising a second lens curing unit comprising an activating light source and heating system, wherein the activating light source is configured to direct activating light toward the mold assembly during use;

and wherein the heating system is configured to heat the interior of the second lens curing unit.

26. The apparatus of claim 23, further comprising a second lens curing unit comprising an activating light source and heating system, wherein the activating light source is configured to direct activating light toward the mold assembly during use;

and wherein the heat system is configured to heat the interior of the second lens curing unit; and

wherein the apparatus further comprises a conveyor system configured to convey the mold assembly from the first lens curing unit into and through the second lens curing unit.

27. The apparatus of claim 23, wherein the instant start ballast is configured to apply a striking voltage of between about 250 volts to about 400 volts.

28. The apparatus of claim 23, wherein the voltage supplied by the transformer is sufficient to keep the filament of the fluorescent lamp at a temperature proximate the optimal operating temperature of the filament.

29. The apparatus of claim 23, wherein the voltage supplied by the transformer is sufficient to keep the fluorescent lamp at a temperature proximate the optimal operating temperature of the fluorescent lamp.

30. The apparatus of claim 23, wherein the transformer is a toroidal transformer.

31. The apparatus of claim 23, wherein the transformer and the instant start ballast are independently operable.

32. The apparatus of claim 23, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to independently operate the instant start ballast and the transformer.

33. The apparatus of claim 23, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to independently operate the instant start ballast and the transformer;

and wherein the controller is further configured to turn the transformer off before turning the instant start ballast on.

34. The apparatus of claim 23, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to independently operate the instant start ballast and the transformer;

and wherein the controller is further configured to turn the transformer on when the lamp is turned off.

35. The apparatus of claim 23, further comprising a controller coupled to the instant start ballast and the transformer, wherein the controller is configured to turn the transformer off after a predetermined amount of time has passed without receiving a signal to turn the fluorescent lamp on.

36. The apparatus of claim 23, wherein the transformer is configured to apply less than about 5 volts to the filament.

37. The apparatus of claim 23, wherein the instant start ballast is a high frequency ballast.

38. The apparatus of claim 23, wherein the fluorescent lamp has a peak light intensity at a range of about 385 mm to about 490 nm.

39. The apparatus of claim 23, further comprising a filter disposed directly adjacent to the fluorescent lamp, the filter being configured to manipulate an intensity of the activating light emanating from the fluorescent lamp.

40. The apparatus of claim 23, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit.

41. The apparatus of claim 23, further comprising an anneal unit, the anneal unit comprising an anneal unit heating system, wherein the anneal unit heating system is configured to heat the interior of the anneal unit;

and wherein the anneal unit heating system further comprises an anneal unit conveyor system configured to convey the mold assembly through the anneal unit.

42. The apparatus of claim 23, further comprising a second lens curing unit comprising an activating light source and heating system, wherein the activating light source is configured to direct activating light toward the mold assembly during use;

and wherein the heating system is configured to heat the interior of the second lens curing unit;

the second lens curing unit further comprising a ballast system to control the fluorescent lamp, wherein the ballast system comprises an instant start ballast and a transformer, wherein the instant start ballast is configured to deliver a striking voltage to the fluorescent lamp, wherein the instant start ballast is further configured to regulate the current to the fluorescent lamp when the fluorescent lamp is on; and

wherein the transformer is configured to deliver voltage to a filament of the fluorescent lamp when the fluorescent lamp is off.