LIGHT CONTROL SYSTEM AND CONTROL METHOD THEREOF

• US 20100295457A1
• Filed: 03/12/2010
• Published: 11/25/2010
• Est. Priority Date: 05/20/2009
• Status: Abandoned Application

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: LU, Chih Hung, Lin, Cho Yi
• Application Number:
  US12/723,522
• Publication Number:
  US 20100295457A1
• Time in Patent Office: Days
• US Class Current: 315/159
• CPC Class Codes: H05B 47/155 Coordinated control of two or more light sources
• CPC Class Codes: H05B 47/19 via wireless transmission

Abstract

A light control system includes at least one illumination module and a remote controller. Each illumination module includes an identification signal generator, at least one light source, a receiving unit and a control circuit. When the receiving unit receives a first wireless control signal, the control circuit controls the identification signal generator to emit an identification signal; when the receiving unit receives a second wireless control signal, the control circuit controls the ON/OFF of the light source. The remote controller sends the first and second wireless control signals to the illumination module, acquires the identification signal emitted from the identification signal generator to generate a plurality of images, and identifies the illumination module according to the images. The present invention further provides a control method of a light control system.

Claims

1. A light control system, comprising:

at least one illumination module, comprising;

an identification signal generator, configured to emit invisible light with a modulation frequency;

at least one light source;

a receiving unit, configured to receive a first wireless control signal and a second wireless control signal; and

a control circuit, controlling the identification signal generator to emit the invisible light when the receiving unit receives the first wireless control signal, and controlling the ON/OFF of the light source when the receiving unit receives the second wireless control signal; and

a remote controller, comprising;

a transmitter, configured to send the first wireless control signal and the second wireless control signal;

an image sensing module, acquiring the invisible light emitted from the identification signal generator to generate a plurality of images; and

a processing unit, identifying the illumination module according to the images, and controlling the transmitter to send the first wireless control signal and the second wireless control signal.

2. The light control system as claimed in claim 1, wherein the light source is selected from one or more of a fluorescent light, an incandescent lamp, a halogen light, a light emitting diode and an organic light emitting diode.

3. The light control system as claimed in claim 1, wherein the image sensing module acquires images with a sampling frequency that is a multiple of the modulation frequency.

4. The light control system as claimed in claim 1, wherein the image sensing module further comprises:

a filter, configured to block the light with a spectrum outside the spectrum of the invisible light;

an image sensor, configured to acquire the invisible light emitted from the identification signal generator to generate the plurality of images; and

a lens, configured to adjust the sensing efficiency of the image sensor.

5. The light control system as claimed in claim 1, wherein the light control system comprises a plurality of illumination modules, and the modulation frequency of the invisible light emitted by the identification signal generator of each illumination module is a multiple of that of other illumination modules.

6. The light control system as claimed in claim 5, wherein the image sensing module acquires images with a sampling frequency that is a common multiple of the modulation frequencies.

7. The light control system as claimed in claim 1, wherein the remote controller further comprises at least one button;

when the button is pressed continuously, the processing unit controls the transmitter to send the first wireless control signal and controls the image sensing module to acquire the images;

when the button is released, the processing unit controls the transmitter to send the second wireless control signal.

8. The light control system as claimed in claim 1, wherein the remote controller further comprises at least one button;

when the button is pressed the first time, the processing unit controls the transmitter to send the first wireless control signal and controls the image sensing module to acquire the images;

when the button is pressed the second time, the processing unit controls the transmitter to send the second wireless control signal.

9. The light control system as claimed in claim 1, wherein the identification signal generator is a light emitting diode or a laser diode.

10. The light control system as claimed in claim 1, wherein a frequency of the second wireless control signal is equal to the modulation frequency of the invisible light.

11. A control method of a light control system, the light control system comprising at least one illumination module and a remote controller, the illumination module comprising at least one light source, the control method comprising the steps of:

sending a first wireless control signal with the remote controller;

receiving the first wireless control signal and emitting an identification signal with the illumination module;

acquiring the identification signal with the remote controller to generate a plurality of images;

identifying the illumination module according to the images and accordingly sending a second wireless control signal with the remote controller; and

receiving the second wireless control signal with the illumination module and accordingly controlling the ON/OFF of the light source thereof.

12. The control method as claimed in claim 11, wherein the remote controller further comprises at least one button;

when the button is pressed continuously, the remote controller sends the first wireless control signal;

when the button is released, the remote controller sends the second wireless control signal.

13. The control method as claimed in claim 11, wherein the remote controller further comprises at least one button;

when the button is pressed the first time, the remote controller sends the first wireless control signal;

when the button is pressed the second time, the remote controller sends the second wireless control signal.

14. The control method as claimed in claim 11, wherein the identification signal is a modulated light signal with a modulation frequency.

15. The control method as claimed in claim 14, wherein in the step of acquiring the identification signal with the remote controller to generate a plurality of images, the remote controller acquires the images with a sampling frequency that is a multiple of the modulation frequency.

16. A control method of a light control system, the light control system comprising a plurality of illumination modules and a remote controller, each illumination module comprising at least one light source, the control method comprising the steps of:

sending a first wireless control signal to the plurality of illumination modules with the remote controller;

emitting different identification signals with the illumination modules respectively;

acquiring the identification signals with the remote controller to generate a plurality of images;

identifying different illumination modules with the remote controller according to the images; and

sending a second wireless control signal with the remote controller to the illumination modules to control the ON/OFF of the light source of selected illumination modules.

17. The control method as claimed in claim 16, wherein the identification signal is a modulated light signal with a modulation frequency.

18. The control method as claimed in claim 17, wherein the modulation frequency of the identification signal emitted by each illumination module is a multiple of that emitted by other illumination modules;

and the remote controller acquires the images with a sampling frequency that is a common multiple of the modulation frequencies.

19. The control method as claimed in claim 18, wherein in the step of identifying different illumination modules with the remote controller according to the images, the remote controller identifies different illumination modules according to the regularity of the identification signals appeared in the captured images.

20. The control method as claimed in claim 16, wherein before the step of identifying different illumination modules with the remote controller according to the images, the control method further comprises the steps of:

setting a window of interest in the images; and

identifying the illumination modules in the window of interest according to the images and emitting a second wireless control signal to the illumination modules with the remote controller to control the ON/OFF of the light source of the illumination modules in the window of interest.