Illuminating device and luminance switching device thereof

• US 20080129211A1
• Filed: 01/12/2007
• Published: 06/05/2008
• Est. Priority Date: 11/10/2006
• Status: Active Grant

• Current Assignee: Macroblock, Inc.
• Original Assignee: Macroblock, Inc.
• Inventors: Lin, Rong-Tsung, Lin, Yi-Sheng
• Granted Patent: US 7,777,703 B2
• Time in Patent Office: Days
• US Class Current: 315/151
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 45/3725 Switched mode power supply [SMPS]
• CPC Class Codes: Y02B 20/30 Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Abstract

An illuminating device and a luminance switching device thereof for controlling luminance of light emitting states of LED light source are provided. The luminance switching device includes a changeover switch which is electrically connected to the luminance switching device for switching the light-emitting states of the LED light source and has switching modes corresponding to the light-emitting states, a detecting circuit for detecting the switching mode corresponding to the changeover switch, a memory unit for storing luminance values of the LED light source corresponding to the switching modes detected by the detecting circuit, converting the luminance values of the LED light source into a luminance control signal, and transmitting the luminance control signal to the detecting circuit, and a power conversion circuit for receiving the luminance control signal transmitted from the detecting circuit, such that the LED light source produces luminance of the light-emitting states corresponding to the switching modes.

Claims

1. An illuminating device, comprising:

an LED light source, composed of at least one light-emitting diode (LED), wherein the LED light source has a plurality of light-emitting states;

a changeover switch, for switching the light-emitting states of the LED light source, wherein the changeover switch has a plurality of switching modes corresponding to the light-emitting states;

a detecting circuit, electrically connected to the changeover switch, for detecting the switching modes of the changeover switch;

a memory unit, electrically connected to the detecting circuit, for storing luminance values of the LEDs of the LED light source corresponding to the switching modes of the changeover switch detected by the detecting circuit, converting the luminance values of the LEDs into a luminance control signal, and transmitting the luminance control signal to the detecting circuit; and

a power conversion circuit, electrically connected to the LED light source, for receiving the luminance control signal transmitted from the detecting circuit, such that the LEDs produce luminance of the light-emitting states corresponding to the switching modes.

2. The illuminating device as claimed in claim 1, wherein the luminance of at least one LED of the LED light source is different under a different switching mode of the changeover switch.

3. The illuminating device as claimed in claim 1, further comprising an external power source, for providing power to the illuminating device through the switching of the changeover switch.

4. The illuminating device as claimed in claim 1, further comprising a direct current (DC) power source electrically connected to the LED light source, for providing power to the LED light source.

5. The illuminating device as claimed in claim 1, wherein the detecting circuit comprises:

an amplifier, having a forward input end for receiving the light-emitting states of the LED light source, and having a backward input end electrically connected to the changeover switch for receiving the switching modes of the changeover switch; and

an analog/digital conversion circuit, electrically connected to the amplifier and the memory unit, for converting an analog control signal transmitted from the amplifier and the memory unit into a digital control signal.

6. The illuminating device as claimed in claim 2, wherein the changeover switch performs the switching modes of the LED light source through an external trigger signal.

7. The illuminating device as claimed in claim 6, wherein the external trigger signal is a continuous pressing signal, and the luminance values of the LEDs of the LED light source are in direct or inverse proportion to time when the changeover switch is pressed.

8. The illuminating device as claimed in claim 6, wherein the external trigger signal is a multi-stage switching signal, and the luminance values of the LEDs of the LED light source increase in multiple stages or decreases in multiple stages according to a number of times that the changeover switch is switched.

9. The illuminating device as claimed in claim 6, wherein the external trigger signal is a multi-stage pressing signal, a predetermined time interval exists between the switching modes, and the luminance values of the LEDs of the LED light source increase in multiple stages or decreases in multiple stages according to the time when the changeover switch is pressed.

10. The illuminating device as claimed in claim 6, further comprising a signal input end for receiving the external trigger signal.

11. The illuminating device as claimed in claim 1, wherein the changeover switch is a programmable circuit.

12. The illuminating device as claimed in claim 1, wherein the power conversion circuit is an alternate current (AC)/direct current (DC) converter.

13. The illuminating device as claimed in claim 1, wherein the power conversion circuit is a DC/DC converter.

14. The illuminating device as claimed in claim 1, wherein the luminance control signal output from the power conversion circuit is a pulse width modulation (PWM) signal.

15. The illuminating device as claimed in claim 1, wherein the luminance control signal output from the power conversion circuit is a voltage signal.

16. The illuminating device as claimed in claim 1, wherein the luminance control signal output from the power conversion circuit is a current signal.

17. A luminance switching device, for switching luminance of a plurality of light-emitting states produced by a light-emitting diode (LED) light source including at least one LED, the luminance switching device comprising:

a changeover switch, electrically connected to the luminance switching device, for switching the light-emitting states of the LEDs, wherein the changeover switch has a plurality of switching modes corresponding to the plurality of light-emitting states;

a detecting circuit, electrically connected to the changeover switch, for detecting the switching modes of the changeover switch;

a memory unit, electrically connected to the detecting circuit, for storing luminance values of the LEDs corresponding to the switching modes of the changeover switch detected by the detecting circuit, converting the luminance values of the LEDs into a luminance control signal, and transmitting the luminance control signal to the detecting circuit; and

a power conversion circuit, electrically connected to the LED light source, for receiving the luminance control signal transmitted from the detecting circuit, such that the LEDs produce luminance of the light-emitting states corresponding to the switching modes.

18. The luminance switching device as claimed in claim 17, wherein the luminance of at least one LED of the LED light source is different under a different switching mode of the changeover switch.

19. The luminance switching device as claimed in claim 17, further comprising an external power source, for providing power to the luminance switching device through the switching of the changeover switch.

20. The luminance switching device as claimed in claim 17, further comprising a direct current (DC) power source electrically connected to the LED light source, for providing power to the LED light source.

21. The luminance switching device as claimed in claim 17, wherein the detecting circuit comprises:

an amplifier, having a forward input end for receiving the light-emitting states of the LED light source, and a backward input end electrically connected to the changeover switch for receiving the switching modes of the changeover switch; and

an analog/digital conversion circuit, electrically connected to the amplifier and the memory unit, for converting an analog control signal transmitted from the amplifier and the memory unit into a digital control signal.

22. The luminance switching device as claimed in claim 18, wherein the changeover switch performs the switching modes of the LED light source through an external trigger signal.

23. The luminance switching device as claimed in claim 22, wherein the external trigger signal is a continuous pressing signal, and the luminance values of the LEDs of the LED light source are in direct or inverse proportion to time when the changeover switch is pressed.

24. The luminance switching device as claimed in claim 22, wherein the external trigger signal is a multi-stage switching signal, and the luminance values of the LEDs of the LED light source increase in multiple stages or decreases in multiple stages according to a number of times that the changeover switch is switched.

25. The luminance switching device as claimed in claim 22, wherein the external trigger signal is a multi-stage pressing signal, a predetermined time interval exists between the switching modes, and the luminance values of the LEDs of the LED light source increase in multiple stages or decreases in multiple stages according to the time when the changeover switch is pressed.

26. The luminance switching device as claimed in claim 22, further comprising a signal input end for receiving the external trigger signal.

27. The luminance switching device as claimed in claim 17, wherein the changeover switch is a programmable circuit.

28. The luminance switching device as claimed in claim 17, wherein the power conversion circuit is an alternate current (AC)/direct current (DC) converter.

29. The luminance switching device as claimed in claim 17, wherein the power conversion circuit is a DC/DC converter.

30. The luminance switching device as claimed in claim 17, wherein the luminance control signal output from the power conversion circuit is a pulse width modulation (PWM) signal.

31. The luminance switching device as claimed in claim 17, wherein the luminance control signal output from the power conversion circuit is a voltage signal.

32. The luminance switching device as claimed in claim 17, wherein the luminance control signal output from the power conversion circuit is a current signal.