Multiple LED control apparatus and method

• US 7,258,463 B2
• Filed: 05/19/2004
• Issued: 08/21/2007
• Est. Priority Date: 05/19/2003
• Status: Active Grant

• Current Assignee: Sloan Company Incorporated (Sloan), Sloanled Incorporated
• Original Assignee: Sloanled Incorporated
• Inventors: Sloan, Thomas C., Ferrie, Drew
• Primary Examiner(s): O'Shea; Sandra
• Assistant Examiner(s): Tsidulko; Mark
• Application Number:
  US10/850,299
• Publication Number:
  US 20050007035A1
• Time in Patent Office: 1,189 Days
• Field of Search: 362/231, 362/249, 362/227, 362/252, 362/800, 362/812, 345/204, 345/691, 345/692, 345/39, 345/46, 345/82, 345/83
• US Class Current: 362/231
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/32 Pulse-control circuits
• CPC Class Codes: H05B 45/395 Linear regulators
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

One embodiment of a system for illuminating multiple LEDs has a plurality of LEDs and a controller programmed to provide a plurality of serial binary signals, each of which drives a respective one of the plurality of LEDs. Each of the serial binary signals has a series of pulses with each of said plurality of LEDs emitting light during each pulse of its respective one of the serial binary signals. The emitting intensity of each of the plurality of LEDs depends on the number of pulses in its respective one of the serial binary signals, wherein the light from the plurality of LEDs combines to emit a color of light.

Claims

1. A system for illuminating multiple emitters, comprising:

a plurality of emitters;

a controller programmed to provide a plurality of serial binary signals, each of which drives a respective one of said plurality of emitters, wherein each of said serial binary signals comprises a series of pulses having substantially the same width, each of said plurality of emitters connected to accept said binary signals in binary form and connected to emit light during each pulse of a respective one of said serial binary signals, the emitting intensity of each of said plurality of emitters proportional to the number of pulses in a respective one of said serial binary signals.

2. The system of claim 1, wherein said plurality of emitters comprises at least two LEDs emitting different colors of light, wherein the light from said plurality of LEDs combines to emit a different color of light.

3. The system of, claim 2, wherein said plurality of LEDs comprises a red, green and blue LED.

4. The system of claim 2, further comprising a plurality of transistors, each of which is coupled to a respective one of said plurality of LEDs, a respective one of said serial binary signals coupled to one of said transistors, said transistor causing its respective one of said LEDs to emit light during each pulse of its serial binary signal.

5. The system of claim 1, wherein said plurality of emitters comprises a plurality of red LEDs, a plurality of green LEDs, and a plurality of blue LEDs.

6. The system of claim 5, wherein a respective one of said plurality of serial binary signals drives said red LEDs, green LEDs and blue LEDs.

7. The system of claim 1, wherein said controller accepts a control input to control the color or mode of light from said emitters, said controller generating different ones of said plurality of serial binary signals depending on the state of said control input.

8. The system of claim 1, wherein said controller accepts a plurality of control inputs to control the color or mode of light from said emitters, said controller generating different ones of said plurality of serial binary signals depending on the state of said control inputs.

9. The system of claim 1, wherein each of said serial binary signals comprises a series of 8-bit binary words generated by said controller.

10. The system of claim 1, wherein each said pulse is the same voltage.

11. A system for controlling the illumination of multiple LEDs, comprising:

a microprocessor for accepting a control input and generating a plurality of serial binary signals depending on the state of said input, wherein each of said serial binary signals comprises a series of pulses, each of which has substantially the same voltage and width; and

a plurality of LEDs each of which is arranged to be driven by a respective one of said serial binary signals, each of said plurality of LEDs connected to emit during each pulse of a respective serial binary signal, the emitting intensity of each of said LEDs proportional to the number of pulses in a respective one of said serial binary signals.

12. The system of claim 11, wherein said plurality of LEDs comprises a red, green and blue LED.

13. The system of claim 11, wherein said plurality of LEDs comprises a plurality of red LEDs, a plurality of green LEDs, and a plurality of blue LEDs and wherein a respective one of said plurality of serial binary signals drives said red LEDs, green LEDs and blue LEDs.

14. The system of claim 11, wherein said control input controls the color or mode of light from said LEDs, said microprocessor generating different ones of said plurality of serial binary signals depending on the state of said control input.

15. The system of claim 11, wherein said control input comprises a plurality of inputs to control the color or mode of light from said LEDs, said microprocessor generating different ones of said plurality of serial binary signals depending on the state of said control inputs.

16. The system of claim 11, further comprising a plurality of transistors, each of which is coupled to a respective one of said plurality of LEDs, a respective one of said serial binary signals coupled to one of said transistors, said transistor causing its respective one of said LEDs to emit light during each pulse of its serial binary signal.

17. The system of claim 11, wherein each of said serial binary signals comprises a series of 8-bit binary words generated by said controller.

18. A system for illuminating multiple emitters, comprising:

a first plurality of emitters of one color;

a second plurality of emitters of another color; and

a controller programmed to provide a plurality of serial binary signals, each of which drives a respective one of said first and second plurality of emitters, wherein each of said serial binary signals comprises a series of binary words having pulses having substantially same width, each of said first and second plurality of emitters connected to emit light during each pulse of a respective one of said serial binary signals, the emitting intensity of each of said first and second plurality of emitters proportional to the number of pulses in respective one of said serial binary signals.

19. The system of claim 18, wherein each of said binary words are the same length.

20. The system of claim 18, wherein each of said pulses has substantially the same voltage.

21. The system of claim 18, wherein said first and second plurality of emitters comprises LEDs.

22. The system of claim 18, comprising a third plurality of emitters emitting a third color of light, said controller programmed to provide one of said serial binary streams to said third plurality of emitters, said first, second and third plurality of emitters emitted red, green and blue, respectively.

23. A channel letter lighting system, comprising:

a plurality of channel letters, each of which houses a first plurality of LEDs emitting one color, and at least a second plurality of LEDs emitting another color light, the light from said first and second pluralities of light combining to illuminate each of said channel letters; and

a controller to generate a plurality of serial binary signals, each of which drives a respective one of said first and second plurality of LEDs, each of said serial binary signals comprising pulses of substantially the same voltage and width, each of said first and second plurality of LEDs connected to emit during each pulse of said serial binary signal.

24. The lighting system of claim 23, further comprising a third plurality of LEDs, said controller generating a serial binary signal to drive said third plurality of LEDs, said first, second and third pluralities of LEDs comprising red, green and blue LEDs respectively.

25. A perimeter lighting system, comprising:

a plurality of elongated lighting fixtures, each of which houses a first plurality of LEDs emitting one color, and at least a second plurality of LEDs emitting a different color, said lighting fixtures daisy-chained together such that an electrical signal applied to the first of said elongated lighting fixtures is transmitted to the others; and

a controller to generate a plurality of serial binary signals, each of which drives a respective one of said first and second plurality of LEDs, each of said serial binary signals comprising pulses of substantially the same voltage and width, each of said first and second plurality of LEDs connected to emit during each pulse of said serial binary signal.

26. The lighting system of claim 25, further comprising a third plurality of LEDs, said controller generating a serial binary signal to drive said third plurality of LEDs, said first, second and third pluralities of LEDs comprising red, green and blue LEDs respectively.

27. An illuminated sign lighting system, comprising:

a plurality of elongated lighting fixtures each of which is formed into a desired shape and each of which houses a first plurality of LEDs emitting one color, and at least a second plurality of LEDs emitting a different color, said lighting fixtures daisy-chained together such that an electrical signal applied to the first of said elongated lighting fixtures is transmitted to the others; and

a controller to generate a plurality of serial binary signals, each of which drives a respective one of said first and second plurality of LEDs, each of said serial binary signals comprising pulses of substantially the same voltage and width, each of said first and second plurality of LEDs connected to emit during each pulse of said serial binary signal.

28. The lighting system of claim 27, further comprising a third plurality of LEDs, said controller generating a serial binary signal to drive said third plurality of LEDs, said first, second and third pluralities of LEDs comprising red, green and blue LEDs respectively.

29. A system for illuminating a spa or pool, comprising;

a reservoir shell capable of holding water;

a plurality of spa components extending through said reservoir shell;

a first plurality of LEDs emitting one color, each of which illuminates into said reservoir shell through a respective one of said reservoir components, and at least a second plurality of LEDs emitting a different color, each of which also illuminates into said reservoir shell through a respective one of said reservoir components; and

a controller to generate a plurality of serial binary signals, each of which drives a respective one of said first and second plurality of LEDs, each of said serial binary signals comprising pulses of substantially the same voltage and width, each of said first and second plurality of LEDs connected to emit during each pulse of said serial binary signal.

30. The system of claim 29, further comprising a third plurality of LEDs, said controller generating a serial binary signal to drive said third plurality of LEDs, said first, second and third pluralities of LEDs comprising red, green and blue LEDs respectively.

31. A method for illuminating multiple LEDs, comprising:

providing at least a first and second plurality of LEDs, said first plurality of LEDs emitting a different color than said second plurality of LEDs; and

driving each of said first and second plurality of LEDs with a respective serial binary signal, each of said serial binary signals having uniform pulses of substantially the same voltage and width, each of said plurality of LEDs emitting light in response to each of said uniform pulses.

32. The method of claim 31, further comprising combining the color from said first and second plurality of LEDs to generate a third color.

33. The method of claim 31, wherein the emitting intensity of said first and second plurality of LEDs is dependant upon the number of pulses in its serial binary signal.

34. The method of claim 31, further comprising providing a third plurality of LEDs emitting still a different color of light and driving said third plurality with a serial binary signal.

35. The method of claim 34, wherein said first, second and third plurality of LEDs comprise red, green and blue emitting LEDs respectively.