Lighting system, dimming control apparatus and dimming control method

• US 8,587,212 B2
• Filed: 05/27/2011
• Issued: 11/19/2013
• Est. Priority Date: 08/10/2010
• Status: Active Grant

• Current Assignee: Industrial Technology Research Institute
• Original Assignee: Industrial Technology Research Institute
• Inventors: Li, Hung-Chun, Yu, Wun-Long
• Primary Examiner(s): Tan, Vibol
• Application Number:
  US13/118,296
• Publication Number:
  US 20120038287A1
• Time in Patent Office: 907 Days
• Field of Search: 315/294, 315/297, 315/315, 315/DIG.4, 315/299, 315/195, 315/307, 315/295, 315/316
• US Class Current: 315/250
• CPC Class Codes: H05B 45/10 Controlling the intensity of the light
• CPC Class Codes: H05B 47/18 via data-bus transmission

Abstract

A lighting system, a dimming control apparatus, and a dimming control method are provided. The dimming control apparatus includes a control unit and a dimming driving unit. In response to a dimming command and a number, the control unit decodes the dimming command into a plurality of sub-dimming commands. The dimming driving unit has a plurality of output terminals for coupling to a plurality of lamp modules. According to the sub-dimming commands, the control unit controls the dimming driving unit to output a plurality of dimming driving signals corresponding to the lamp modules to adjust the brightness of each lamp module individually.

Claims

1. A dimming control apparatus, comprising:

a control unit, in response to a dimming command and a number, for decoding the dimming command into a plurality of sub-dimming commands, wherein the number is a positive integer; and

a dimming driving unit having a plurality of output terminals for coupling to a plurality of lamp modules;

wherein according to the sub-dimming commands, the control unit controls the dimming driving unit to output a plurality of dimming driving signals corresponding to the lamp modules so as to control the brightness of each of the lamp modules individually,

wherein the dimming command has a plurality of bits, the control unit divides the bits of the dimming command into the sub-dimming commands, according to the number, so that each of the sub-dimming commands has at least one bit.

2. The dimming control apparatus according to claim 1, wherein the dimming driving unit comprises:

a plurality of dimming drivers, each of which has an output terminal for coupling to the lamp modules in one-to-one manner.

3. The dimming control apparatus according to claim 2, wherein the control unit respectively outputs a plurality of dimming control signals to corresponding dimming drivers according to the sub-dimming commands.

4. The dimming control apparatus according to claim 3, wherein each of the dimming drivers generates the dimming driving signal according to the received dimming control signal to control the brightness of the lamp module coupled to the dimming driver.

5. The dimming control apparatus according to claim 1, wherein the dimming driving unit is a pulse-width modulation (PWM) control unit, and the dimming driving signals outputted by the dimming driving unit are PWM signals.

6. A lighting system, comprising:

a plurality of lamp modules;

a dimming control apparatus, comprising;

a control unit, in response to a dimming command and a number, for decoding the dimming command into a plurality of sub-dimming commands, wherein the number is a positive integer; and

a dimming driving unit having a plurality of output terminals for coupling to the lamp modules respectively, wherein the control unit controls the dimming driving unit according to the sub-dimming commands, and enables the dimming driving unit to output a plurality of dimming driving signals corresponding to the lamp modules so as to control the brightness of each of the lamp modules individually; and

a dimming command input unit, coupled to the control unit of the dimming control apparatus, for obtaining the dimming command,

wherein the dimming command has a plurality of bits, the control unit divides the bits of the dimming command into the sub-dimming commands, according to the number, so that each of the sub-dimming commands has at least one bit.

7. The lighting system according to claim 6, wherein the dimming driving unit comprises:

a plurality of dimming drivers, each of which has an output terminal for coupling to the lamp modules in one-to-one manner.

8. The lighting system according to claim 7, wherein the control unit respectively outputs a plurality of dimming control signals to corresponding dimming drivers according to the sub-dimming commands.

9. The lighting system according to claim 8, wherein each of the dimming drivers generates the dimming driving signal according to the received dimming control signal to control the brightness of the lamp module coupled to the dimming driver.

10. The lighting system according to claim 6, wherein the dimming driving unit is a pulse-width modulation (PWM) control unit, and the dimming driving signals outputted by the dimming driving unit are PWM signals.

11. The lighting system according to claim 6, further comprising a number setting device, coupled to the control unit of the dimming control apparatus, for obtaining the number.

12. A dimming control method for adjusting brightness of a plurality of lamp modules, the method comprising:

(a) in response to a dimming command and a number, decoding the dimming command into a plurality of sub-dimming commands, wherein the number is a positive integer; and

(b) generating a plurality of dimming driving signals according to the sub-dimming commands to adjust the brightness of the lamp modules individually,

wherein the dimming command has a plurality of bits, and in the step (a), the bits of the dimming command are divided into the sub-dimming commands, according to the number, so that each of the sub-dimming commands has at least one bit.

13. The dimming control method according to claim 12, wherein the number of bits of one of the sub-dimming commands determines the number of dimming levels of the brightness between 0 to 100% for the corresponding lamp module.

14. The dimming control method according to claim 12, wherein the step (b) further comprises:

generating a plurality of dimming control signals according to the sub-dimming commands.

15. The dimming control method according to claim 14, wherein the step (b) further comprises:

generating the corresponding dimming driving signals according to the dimming control signals.