Control circuit and method thereof for reducing power consumption of a display device

• US 20060146043A1
• Filed: 05/24/2005
• Published: 07/06/2006
• Est. Priority Date: 12/30/2004
• Status: Active Grant

• Current Assignee: Tatung Company
• Original Assignee: Tatung Company
• Inventors: Lee, Ray-Din, Tseng, Shih-Hua
• Granted Patent: US 7,420,553 B2
• Time in Patent Office: Days
• US Class Current: 345/211
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092

Abstract

The invention discloses a control circuit and method thereof, which enable a display device to have low power consumption. The display device is able to switch between a normal mode and a standby mode, and reduce the power consumption of the display device under the standby mode. A synchro signal detection circuit, an infrared receiver, and a power switch are used to determine when to output a triggering signal. If an MCU inputs a triggering signal, a switch circuit will provide electricity for a peripheral circuit, then the display device switches to the normal mode; otherwise, the switch circuit will stop providing electricity for the peripheral circuit, and the display device switches to the standby mode.

Claims

1. A control circuit capable of enabling a display device to switch between a normal mode and a standby mode and reducing power consumption of said display device when in the standby mode, comprising:

a synchro signal detection circuit, wherein when said synchro signal detection circuit detects a synchro signal of an analog computer image signals, said circuit will output a triggering signal;

an infrared receiver, wherein when said infrared receiver detects an infrared signal sent by a remote controller, said infrared receiver will output a triggering signal;

a power switch, wherein when said power switch is actuated, said power switch will output a triggering signal;

a switch circuit which provides enough power for a peripheral circuit; and

an MCU, wherein when said MCU inputs a triggering signal, said switch circuit will provide enough power for a peripheral circuit to run;

said display device switches to normal mode;

when said MCU does not input a triggering signal, said switch circuit will stop providing power to said peripheral circuit;

then said display device switches to standby mode.

2. The control circuit as claimed in claim 1, wherein said synchro signals comprise horizontal synchro signals and vertical synchro signals.

3. The control circuit as claimed in claim 1, wherein said display device is an LCD television, plasma panel etc.

4. The control circuit as claimed in claim 1, wherein said peripheral circuit comprises:

a 1st analog-digital converter, a scaler, a 2nd analog-digital converter, a video decoder, a de-interlacer, a ghost reducer, and a 3D comb-filter.

5. A method of reducing power consumption of a display device, which enables a display device to switch between a normal mode and a standby mode and reduces power consumption of said display device when in the standby mode, the method comprising the steps of:

(A) initializing a control circuit;

(B) initializing a peripheral circuit;

(C) determining whether said display device switches to the standby mode;

if it is in the standby mode, said peripheral circuit will be switched to the standby mode; and

(D) determining whether a triggering signal is detected;

if said triggering signal is detected, said peripheral circuit will be switched to the normal mode;

wherein when said peripheral circuit is in the standby mode, power for said peripheral circuit ceases.

6. The control circuit as claimed in claim 5, wherein said display device is an LCD television or a plasma panel.

7. The control circuit as claimed in claim 5, wherein said triggering signal corresponds to a synchro signal of analog computer image signals.

8. The control circuit as claimed in claim 5, wherein said triggering signal corresponds to an infrared signal of a remote controller.

9. The control circuit as claimed in claim 5, wherein said triggering signal is sent by a power switch.

10. The control circuit as claimed in claim 5, wherein said control circuit comprises:

a synchro signal detection circuit, an infrared receiver, a power switch, a switch circuit, and an MCU.

11. The control circuit as claimed in claim 5, wherein said peripheral circuit comprises:

a 1st analog-digital converter, a scaler, a 2nd analog-digital converter, a video decoder, a de-interlacer, a ghost reducer, and a 3D comb-filter.