Light sources for illumination of liquids

• US 7,482,764 B2
• Filed: 10/25/2001
• Issued: 01/27/2009
• Est. Priority Date: 08/26/1997
• Status: Expired due to Term

• Current Assignee: Signify North America Corporation (Signify N.V.)
• Original Assignee: Philips Solid-State Lighting Solutions (Koninklijke Philips N.V.)
• Inventors: Lys, Ihor A., Mueller, George G., Dowling, Kevin J., Morgan, Frederick M.
• Primary Examiner(s): Vu; David Hung
• Assistant Examiner(s): A, MINH D
• Application Number:
  US10/040,292
• Publication Number:
  US 20020130627A1
• Time in Patent Office: 2,651 Days
• Field of Search: 315/291, 315/292, 315/360, 315/516, 315/512, 315/314, 315/204, 315/DIG.5, 315/312, 315/297, 315/362, 362/800, 362/96, 362/582, 362/559
• US Class Current: 315/312
• CPC Class Codes: F21K 9/00 Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
• CPC Class Codes: F21K 9/23 Retrofit light sources for lighting devices with a single fitting for each light source, e.g. for substitution of incandescent lamps with bayonet or threaded fittings
• CPC Class Codes: F21V 31/00 Gas-tight or water-tight arrangements
• CPC Class Codes: F21V 33/004 Sanitary equipment, e.g. mirrors, showers, toilet seats or paper dispensers
• CPC Class Codes: F21W 2121/02 for fountains
• CPC Class Codes: F21W 2131/401 for swimming pools
• CPC Class Codes: F21Y 2113/13 comprising an assembly of point-like light sources
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: G09G 2300/06 Passive matrix structure, i.e. with direct application of both column and row voltages to the light emitting or modulating elements, other than LCD or OLED
• CPC Class Codes: G09G 2310/0272 Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current
• CPC Class Codes: G09G 2320/0626 for control of overall brightness
• CPC Class Codes: G09G 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 3/14 Semiconductor devices, e.g. diodes
• CPC Class Codes: G09G 3/2014 by modulation of the duration of a single pulse during which the logic level remains constant
• CPC Class Codes: G09G 3/32 semiconductive, e.g. using light-emitting diodes [LED]
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/325 Pulse-width modulation [PWM]
• CPC Class Codes: H05B 47/10 Controlling the light source
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources
• CPC Class Codes: H05B 47/19 via wireless transmission
• CPC Class Codes: Y02B 20/30 : Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

Light sources for illumination of liquids in a variety of environments. In one example, multi-color LED-based light sources are adapted to engage mechanically and electrically with various types of conventional light sockets, including light sockets conventionally found in a pool or spa environment. In another example, a light fixture for a pool or spa is particularly adapted to engage mechanically and electrically with a wedge type socket supported by a pool or spa. In another example, a light fixture for illumination of liquids includes an encapsulant to protect the light fixture from moisture, due to the characteristically humid environment encountered in liquid illumination applications.

Claims

1. An apparatus, comprising:

at least one light source adapted to be supported by one of a pool and a spa to illuminate a liquid contained in the one of the pool and the spa, the at least one light source including at least one LED and being positioned so as to illuminate the liquid with substantially unguided radiation, wherein the one of the pool and the spa has a range of typical liquid levels of the liquid during use, and wherein the at least one light source is adapted to be disposed below the range of typical liquid levels; and

an encapsulant to protect the at least one light source from moisture.

2. The apparatus of claim 1, wherein the encapsulant is in contact with at least the at least one LED.

3. The apparatus of claim 2, wherein the encapsulant includes a conformal coating.

4. An apparatus, comprising:

at least one light source adapted to be supported by one of a pool and a spa to illuminate a liquid contained in the one of the pool and the spa, the at least one light source including at least one LED, and

an interface coupled to the at least one light source, the interface being adapted to engage mechanically and electrically with a conventional light socket supported by the one of the pool and the spa, wherein;

the conventional light socket includes a wedge type light socket; and

the interface is adapted to engage mechanically and electrically with the wedge type light socket.

5. An apparatus, comprising:

at least one light source adapted to be supported by one of a pool and a spa to illuminate a liquid contained in the one of the pool and the spa, the at least one light source including at least one LED,

wherein the at least one LED includes at least two independently controllable LEDs.

6. An apparatus, comprising:

at least one light source adapted to be supported by one of a pool and a spa to illuminate a liquid contained in the one of the pool and the spa, the at least one light source including at least one LED,

wherein the at least one light source includes at least two independently controllable light sources.

7. The apparatus of claim 6, wherein the at least two independently controllable light sources include at least two independently addressable light sources.

8. An apparatus, comprising:

at least one light source adapted to be supported by one of a pool and a spa to illuminate a liquid contained in the one of the pool and the spa, the at least one light source including at least one LED,

further comprising at least one controller coupled to the at least one light source to control radiation output by the at least one light source, wherein;

the at least one controller outputs at least one control signal to the at least one light source to control the radiation output by the at least one light source; and

the at least one control signal includes at least one variable analog signal.

9. An apparatus, comprising:

at least one light source adapted to be supported by one of a pool and a spa to illuminate a liquid contained in the one of the pool and the spa, the at least one light source including at least one LED,

further comprising at least one controller coupled to the at least one light source to control radiation output by the at least one light source, and

at least one storage device, coupled to the at least one controller, to store at least one illumination program, wherein the at least one controller is adapted to execute the at least one illumination program so as to control the radiation output by the at least one light source.

10. An apparatus, comprising:

at least one light source adapted to be supported by one of a pool and a spa to illuminate a liquid contained in the one of the pool and the spa, the at least one light source including at least one LED; and

at least one controller coupled to the at least one light source to control radiation output by the at least one light source, wherein the at least one light source includes at least a first light source and a second light source each adapted to be supported by the one of the pool and the spa and to illuminate the liquid contained in the one of the pool and the spa, wherein the at least one controller includes at least a first controller coupled to the first light source and a second controller coupled to the second light source, and wherein;

each of the first controller and the second controller is independently addressable; and

the first controller and the second controller are coupled together to form a networked lighting system.

11. A light fixture for one of a pool and a spa, comprising:

at least one LED; and

an interface coupled to the at least one LED, the interface being adapted to engage mechanically and electrically with a wedge type light socket supported by the one of the pool and the spa, wherein the at least one LED includes at least two differently colored LEDs.

12. The light fixture of claim 11, wherein the interface includes means for engaging mechanically and electrically the at least one LED with the wedge type light socket.

13. The light fixture of claim 11, wherein the at least one LED includes at least one red LED, at least one green LED, and at least one blue LED.

14. A light fixture for one of a pool and a spa, comprising:

at least one LED; and

an interface coupled to the at least one LED, the interface being adapted to engage mechanically and electrically with a wedge type light socket supported by the one of the pool and the spa, wherein the one of the pool and the spa has a range of typical liquid levels of the liquid during use, wherein the wedge type light socket is located below the range of typical liquid levels, and wherein the light fixture further includes;

an encapsulant to protect the at least one LED from moisture.

15. The light fixture of claim 14, wherein the encapsulant is in contact with at least the at least one LED.

16. The light fixture of claim 15, wherein the encapsulant includes a conformal coating.

17. A light fixture for one of a pool and a spa, comprising:

at least one LED; and

an interface coupled to the at least one LED, the interface being adapted to engage mechanically and electrically with a wedge type light socket supported by the one of the pool and the spa, wherein the interface includes two pins to engage at least electrically with the wedge type light socket.

18. The light fixture of claim 17, wherein each pin of the two pins has a diameter of approximately 0.09 inches.

19. The light fixture of claim 17, wherein each pin of the two pins has a length of approximately 0.46 inches.

20. The light fixture of claim 17, wherein the two pins are separated from each other by a distance of approximately 0.25 inches.

21. The light fixture of claim 17, wherein:

each pin of the two pins has a diameter of approximately 0.09 inches;

each pin of the two pins has a length of approximately 0.46 inches; and

the two pins are separated from each other by a distance of approximately 0.25 inches.

22. The light fixture of claim 21, wherein the at least one LED includes at least two differently colored LEDs.

23. The light fixture of claim 17, wherein at least one pin of the two pins includes at least one perturbation to facilitate mechanical engagement of the interface and the wedge type light socket.

24. The light fixture of claim 23, wherein the at least one perturbation includes at least one indented groove formed at least partially around a circumference of the at least one pin.

25. The light fixture of claim 24, wherein the at least one perturbation includes at least one continuous indented groove formed completely around the circumference of the at least one pin.

26. The light fixture of claim 25, wherein the at least one continuous indented groove has a perturbation diameter of approximately 0.065 inches.

27. The light fixture of claim 23, wherein the at least one perturbation includes at least one protruding ring formed at least partially around a circumference of the at least one pin.

28. The light fixture of claim 27, wherein the at least one perturbation includes at least one continuous protruding ring formed completely around the circumference of the at least one pin.

29. The light fixture of any of claims 23-28, wherein the at least one perturbation is located approximately 0.17 inches from an end of the at least one pin.

30. The light fixture of claim 23, wherein a first pin of the two pins includes a first perturbation and a second pin of the two pins includes a second perturbation to facilitate mechanical engagement of the interface and the wedge type light socket.

31. The light fixture of claim 17, wherein the interface includes at least one rubber grommet to facilitate mechanical engagement of the interface and the wedge type light socket.

32. The light fixture of claim 31, wherein:

each pin of the two pins has a diameter of approximately 0.09 inches;

each pin of the two pins has a length of approximately 0.46 inches;

the two pins are separated from each other by a distance of approximately 0.25 inches;

a first pin of the two pins includes a first perturbation and a second pin of the two pins includes a second perturbation to facilitate mechanical engagement of the interface and the wedge type light socket;

the first perturbation is located approximately 0.17 inches from an end of the first pin; and

the second perturbation is located approximately 0.17 inches from an end of the second pin.

33. The light fixture of claim 32, wherein:

the first perturbation includes at least one first indented groove formed at least partially around a circumference of the first pin; and

the second perturbation includes at least one second indented groove formed at least partially around a circumference of the second pin.

34. The light fixture of claim 33, wherein each of the first and second perturbations has a perturbation diameter of approximately 0.65 inches.

35. The light fixture of claim 32, wherein:

the first perturbation includes at least one first protruding ring formed at least partially around a circumference of the first pin; and

the second perturbation includes at least one second protruding ring formed at least partially around a circumference of the second pin.

36. The light fixture of claim 32, wherein the one of the pool and the spa has a range of typical liquid levels of the liquid during use, wherein the wedge type light socket is located below the range of typical liquid levels, and wherein the light fixture further includes:

an encapsulant to protect the at least one LED from moisture.

37. The light fixture of claim 32, wherein the at least one LED includes at least two differently colored LEDs.

38. A method of illuminating a liquid in one of a pool and a spa, comprising acts of:

a) engaging at least one light fixture mechanically and electrically with a wedge type light socket supported by the one of the pool and spa, the at least one light fixture including at least one LED; and

b) providing at least power to the at least one light fixture via the wedge type light socket to illuminate the liquid.

39. A method of illuminating a liquid in one of a pool and a spa, comprising acts of.

a) engaging at least one light fixture mechanically and electrically with a wedge type light socket supported by the one of the pool and spa, the at least one light fixture including at least one LED;

and

b) providing at least power to the at least one light fixture via the wedge type light socket to illuminate the liquid, wherein the one of the pool and the spa has a range of typical liquid levels of the liquid during use, wherein the wedge type light socket is located below the range of typical liquid levels, and wherein the act a) comprises an act of. engaging the at least one light fixture, below the range of typical liquid levels, with the wedge type light socket.