DISPLAY DEVICE AND METHOD FOR CONTROLLING BACKLIGHT MODULE OF THE DISPLAY DEVICE

• US 20080238857A1
• Filed: 09/24/2007
• Published: 10/02/2008
• Est. Priority Date: 03/30/2007
• Status: Abandoned Application

• Current Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Original Assignee: Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. (Hon Hai Precision Industry Co., Ltd.), Hon Hai Precision Industry Co., Ltd.
• Inventors: WONG, SHIH-FANG, TSENG, WEN-HAW, ZHANG, LING
• Application Number:
  US11/859,794
• Publication Number:
  US 20080238857A1
• Time in Patent Office: Days
• US Class Current: 345/102
• 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 3/3406 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

Abstract

A method for controlling a backlight module of a display device includes: generating an acceleration signal representing the magnitude of an acceleration of the display device; comparing the acceleration signal with a predetermined threshold to determine whether the acceleration signal is greater than the predetermined threshold; and changing a state of the backlight module if the acceleration signal is greater than the predetermined threshold.

Claims

1. A display device, comprising:

a backlight module;

a power management unit for powering on and powering off the backlight module;

a sensor for detecting an acceleration of the display device and generating an acceleration signal representing a magnitude of the acceleration; and

a signal processor configured for determining whether the acceleration signal is greater than a predetermined threshold and controlling the power management unit to change a state of the backlight module if the acceleration signal is greater than the predetermined threshold.

2. The display device as claimed in claim 1, wherein the signal processor controls the power management unit to maintain the state of the backlight module if the acceleration signal is less than the predetermined threshold.

3. The display device as claimed in claim 1, wherein the state of the backlight module comprises a powered on state and a powered off state.

4. The display device as claimed in claim 1, further comprising a switch connected between the power management unit and the sensor for connecting and disconnecting the sensor to the power management unit.

5. The display device as claimed in claim 1, further comprising a power supply for supplying electrical power to the backlight module.

6. The display device as claimed in claim 1, further comprising an LCD panel for displaying image signals, a gate driver and a data driver for driving the LCD panel.

7. The display device as claimed in claim 1, wherein the sensor is an accelerometer.

8. The display device as claimed in claim 1, wherein the signal processor comprises a calculator for comparing the acceleration signal with the predetermined threshold.

9. The display device as claimed in claim 1, wherein the signal processor comprises a controller for controlling the power management unit to power on and power off the backlight module.

10. The display device as claimed in claim 1, wherein the signal processor comprises a detector for detecting the state of the backlight module and generating a state value representing the state of the backlight module.

11. The display device as claimed in claim 10, further comprising a storage unit coupled to the signal processor.

12. The display device as claimed in claim 11, wherein the signal processor comprises an access unit for storing the state value to the storage unit.

13. A method for controlling a backlight module of a display device, comprising:

generating an acceleration signal representing the magnitude of an acceleration of the display device;

comparing the acceleration signal with a predetermined threshold to determine whether the acceleration signal is greater than the predetermined threshold; and

changing a state of the backlight module if the acceleration signal is greater than the predetermined threshold.

14. The method as claimed in claim 13, further comprising:

maintaining the state of the backlight module if the acceleration signal is less than the predetermined threshold.

15. The method as claimed in claim 13, further comprising:

detecting the state of the backlight module to determine whether the backlight module is powered on.

16. The method as claimed in claim 15, wherein the backlight module is powered off if it is detected the backlight module is powered on and the acceleration signal is greater than the predetermined threshold.

17. The method as claimed in claim 15, wherein the backlight module is powered on if it is detected the backlight module is not powered on and the acceleration signal is greater than the predetermined threshold.

19. The method as claimed in claim 16, further comprising:

updating the state value if the state of the backlight module is changed.

20. The method as claimed in claim 16, further comprising:

maintaining the state of the backlight module if the acceleration signal is less than the predetermined threshold.

18. A method for controlling a backlight module of a display device, comprising:

detecting a state of the backlight module to generate a state value representing the state of the backlight module;

storing the state value;

generating an acceleration signal representing the magnitude of an acceleration of the display device;

comparing the acceleration signal with a predetermined threshold to determine whether the acceleration signal is greater than the predetermined threshold;

reading the state value; and

changing the backlight module to a new state opposite to the state if the acceleration signal is greater than the predetermined threshold.