Light emitting apparatus and method of manufacturing and using the same

• US 20130106305A1
• Filed: 08/15/2012
• Published: 05/02/2013
• Est. Priority Date: 02/14/2011
• Status: Abandoned Application

• Current Assignee: Bradford K. Whitaker, Kenneth Brownlee
• Original Assignee: Bradford K. Whitaker, Kenneth Brownlee
• Inventors: Whitaker, Bradford K., Brownlee, Kenneth
• Application Number:
  US13/573,044
• Publication Number:
  US 20130106305A1
• Time in Patent Office: Days
• US Class Current: 315/210
• CPC Class Codes: G05F 3/02 Regulating voltage or current
• CPC Class Codes: H05B 45/20 Controlling the colour of the light
• CPC Class Codes: H05B 45/37 Converter circuits
• CPC Class Codes: H05B 45/42 Antiparallel configurations
• CPC Class Codes: H05B 47/10 Controlling the light source

Abstract

An apparatus includes a load circuit operatively coupled to a controller circuit through a drive circuit. The drive circuit provides a drive signal to the load circuit in response to receiving a digital indication from the controller circuit. The load circuit includes first and second light emitting sub-circuits connected in parallel. The first and second light emitting sub-circuits provide first and second spectrums of light, respectively.

Claims

1. A method comprising providing a digital signal S drive having a square waveform and varying between a first voltage and a second voltage, maintaining a voltage of the signal Sdrive substantially constant at a third voltage that is between the first voltage and the second voltage for a period of time as said voltage of the digital signal Sdrive changes from the first voltage to the second voltage, and modulating at least one of a digital signal Scontrol and a digital signal Scom with the digital signal Sdrive during said period of time.

2. A method according to claim 1 in which the third voltage has a value other than zero volts.

3. A method according to claim 1 wherein the third voltage is other than midway between the first voltage and the second voltage.

4. A method according to claim 3 wherein the third voltage is sufficiently high to enable a controller switch to function in the absence of the digital signal Sdrive, the controller switch being in electrical communication with a drive controller circuit which generates the digital signal Sdrive.

5. A method according to claim 1 in which the first voltage has a value greater than the second voltage, the signal S drive has a falling edge as S drive changes from the first voltage to the second voltage, and the period during which Sdrive is held constant occurs on the falling edge of the signal Sdrive before the voltage of Sdrive is equal to the second voltage.

6. A system comprising a drive circuit in electrical communication with a digital drive controller circuit, wherein the drive controller circuit produces a digital electrical signal Sdrive having a square waveform varying between a first voltage and a second voltage, the first voltage providing a first potential sufficient to drive a first LED to emit a first color of light and having a second potential sufficient to drive a second LED to emit a second color of light, the second LED having a second polarity opposite to the first polarity;

wherein the system further comprises a first controller switch configured to generate a first digital communication signal Scom1 and to modulate the signal Scom1 with at least one of Sdrive and Scontrol.

7. A system according to claim 6 wherein the first controller switch is configured to modulate the signal Scom1 with Sdrive.

8. A system according to claim 7 further comprising a second controller switch configured to generate a second digital communication signal Scom2 that communicates a command to the drive controller circuit to change at least one of a luminance of the first LED and a luminance of the second LED, and wherein the second controller switch is configured to modulate the signal Scom2 with at least one of Sdrive and Scontrol.

9. A system according to claim 8 wherein the second controller switch is configured to modulate the signal Scom2 with Sdrive.

10. A system according to claim 8 wherein the first controller switch is configured to modulate the signal Scom1 with Scontrol.

11. A system according to claim 8 wherein the second controller switch is configured to modulate the signal Scom2 with Scontrol.

12. A system according to claim 6 the drive controller circuit is configured to provide a third voltage having a value other than zero volts and that is between the first voltage and the second voltage.

13. A system according to claim 12 wherein the drive controller circuit is configured to maintain a voltage of the signal Sdrive substantially constant at the third voltage for a period of time as said voltage of the digital signal Sdrive changes from the first voltage to the second voltage, and the first and second controller switches are configured to modulate at least one of the digital signals Scom1 and Scom2 respectively with the digital signal Sdrive during said period of time.

14. A system according to claim 8 wherein the drive controller circuit comprises a radio to receive a digital signal Scom3 that is transmitted wirelessly.

15. A system according to claim 6 and further comprising a load circuit.

16. A system according to claim 15 wherein the first control switch is in electrical communication with both the load circuit and the drive controller circuit.

17. A system according to claim 15 wherein the load circuit comprises the first LED and the second LED.

18. A system according to claim 6 wherein the first controller switch is configured to communicate with the drive controller circuit to adjust a color setting.

19. A system according to claim 6 wherein the first controller switch is configured to communicate with the drive controller circuit to adjust light luminance.

20. A system according to claim 6 wherein the first controller switch is configured to communicate with the drive controller circuit to adjust a color setting to follow a Circadian clock.

21. A system according to claim 6 and further comprising a timer to control the drive controller circuit.

22. A system according to claim 6 and further comprising a motion sensor to control the drive controller circuit in response to said motion.

23. A system of claim 6 where the controller switch indicates the system status.