Display System and Power Control Method Thereof

• US 20100066765A1
• Filed: 07/19/2006
• Published: 03/18/2010
• Est. Priority Date: 04/11/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Soo Man
• Granted Patent: US 8,884,941 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3265 Power saving in display device
• CPC Class Codes: G09G 2320/064 by time modulation of the brightness of the illumination source
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 2330/022 in absence of operation, e.g. no data being entered during a predetermined time
• CPC Class Codes: G09G 3/22 using controlled light sources
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336
• CPC Class Codes: G09G 3/3611 Control of matrices with row and column drivers
• 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
• CPC Class Codes: G09G 5/006 Details of the interface to the display terminal specific for a display terminal using a CRT G09G1/167; using a flat panel G09G3/2096; circuits for interfacing with colour displays G09G5/04
• CPC Class Codes: H04N 5/63 Generation or supply of power specially adapted for television receivers
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A display system is provided The display system includes a power source unit for supplying power; a signal input unit for receiving a video signal from the outside; a video processor for converting a format of the video signals received from the signal input unit into a displayable format; a display unit electrically connected with the power source unit and displaying an image corresponding to a signal from the video signal processor; a light-emitting unit electrically connected with the power source unit and including at least two light sources; and a controller for judging an operating mode on the basis of a signal input from the signal input unit and controlling power supplied to the display unit and the light-emitting unit depending on the judged operating mode.

Claims

1. A display system comprising:

a power source unit for supplying power;

a signal input unit for receiving video signals from the outside;

a video processor for converting a format of the video signals received from the signal input unit into a displayable format;

a display unit electrically connected with the power source unit and displaying an image corresponding to a signal from the video signal processor;

a light-emitting unit electrically connected with the power source unit and including at least two light sources; and

a controller for judging an operating mode on the basis of a signal input from the signal input unit and controlling power supplied to the display unit and the light-emitting unit depending on the judged operating mode.

2. The display system according to claim 1, wherein the light-emitting unit comprises a plurality of light sources arranged in a ring type.

3. The display system according to claim 1, wherein the light-emitting unit is disposed in a stand supporting the display unit.

4. The display system according to claim 3, wherein the stand includes a circular through hole, and the light-emitting unit comprises a plurality of light sources arranged around the through hole.

5. The display system according to claim 1, wherein the controller variably controls power supplied to the light-emitting unit according to the operating mode.

6. The display system according to claim 5, further comprising a stand having a reflection surface for reflecting light from the light-emitting unit.

7. The display system according to claim 1, wherein the light source is an LED (light-emitting diode).

8. The display system according to claim 1, wherein the controller judges whether there is a synchronization signal in an input signal, and when there is no synchronization signal for a predetermined time, cuts off power supplied to the display unit, and turns on power of the light-emitting unit.

9. The display system according to claim 1, wherein the operating mode is one of a normal mode during which both a color signal and a synchronization signal are input, and a power-saving mode during which none of a color signal and a synchronization signal is input.

10. The display system according to claim 9, wherein the controller controls the light-emitting unit to emit light at brightness that gradually increases from an off-state when the operating mode is judged to be a power-saving mode.

11. The display system according to claim 10, wherein a repetition period of a brightness control of the light-emitting unit is in a range of 1.5-4 seconds.

12. The display system according to claim 9, wherein the controller controls the light-emitting unit to emit light at brightness that gradually decreases from an on-state when the operating mode is judged to be a power-saving mode.

13. The display system according to claim 9, wherein the controller controls the light-emitting unit to emit light at brightness that gradually increases and decreases by a predetermined period when the operating mode is judged to be a power-saving mode.

14. The display system according to claim 9, wherein the controller controls brightness of the light-emitting unit in response to one of a PWM signal, a current amount, and a voltage level when the operating mode is judged to be a power-saving mode.

15. The display system according to claim 9, wherein the controller controls the light-emitting unit to flicker by a predetermined period when the operating mode is judged to be a power-saving mode.

16. The display system according to claim 9, wherein the controller controls the light-emitting unit to maintain a lighting state at a predetermined level when the operating mode is judged to be a normal mode.

17. A display system comprising:

a power source unit for supplying power;

a signal input unit for receiving video signals from the outside;

a video processor for converting a format of the video signals received from the signal input unit into a displayable format;

a display unit for displaying an image corresponding to a signal from the video signal processor;

a light-emitting unit including at least two light sources;

a controller for judging an operating mode on the basis of a signal input from the signal input unit and controlling power supplied to the display unit and the light-emitting unit depending on the judged operating mode; and

a switching element for turning on/off power of one of the light-emitting unit and the display system.

18. The display system according to claim 17, wherein the switching element comprises a brightness level adjustor for adjusting a brightness level of the light-emitting unit.

19. A method for controlling power of a display system, the method comprising:

judging an operating mode of a display system on the basis of an input video signal; and

when the operating mode is a power-saving mode, cutting off power of a display unit and supplying power to a light-emitting unit formed in a support stand supporting the display unit.

20. The method according to claim 19, wherein the judging of the operating mode comprises judging the operating mode depending on whether there exists one of a synchronization signal and a color signal in the input video signal, and when there exists none of a synchronization signal and a color signal for a predetermined time, the operating mode is judged to be the power-saving move.

21. The method according to claim 20, further comprising, when the operating mode is judged to be the power-saving mode, variably supplying power to the light-emitting unit.

22. The method according to claim 20, further comprising, when the operating mode is judged to be the power-saving mode, supplying power to the light-emitting unit such that the light-emitting unit flickers by a period of 1.5-4 seconds.