LCD device power saving system and method of reducing power consumption of LCD device

• US 8,305,331 B2
• Filed: 07/13/2007
• Issued: 11/06/2012
• Est. Priority Date: 07/13/2007
• Status: Active Grant

• Current Assignee: TTE Indianapolis
• Original Assignee: TTE Indianapolis
• Inventors: Rumreich, Mark F.
• Primary Examiner(s): Cheng, Joe H
• Application Number:
  US11/826,316
• Publication Number:
  US 20090015538A1
• Time in Patent Office: 1,943 Days
• Field of Search: 345/87, 345/99, 345/102, 345/211, 349 61- 65, 362 971- 973, 713300-340
• US Class Current: 345/102
• CPC Class Codes: G09G 2320/0646 Modulation of illumination source brightness and image signal correlated to each other
• CPC Class Codes: G09G 2330/023 using energy recovery or conservation
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 3/3406 Control of illumination source illumination devices structurally associated with liquid crystal cells G02F1/1336

Abstract

A control system for a portable display device includes a battery power supply powering a display panel of the portable display device, a backlight controller and a video processor connected to the display panel for displaying images, an adaptive controller providing output signals to the backlight controller and the video processor, a video analyzer providing a first input to the adaptive controller, and a remaining display time estimator providing a second input to the adaptive controller, wherein the remaining display time estimator determines a remaining display time of the portable display device and controls the adaptive controller to adjust one of the backlight controller and the video processor based upon the determined remaining display time.

Claims

1. A control system for a portable display device, comprising:

a battery power supply powering a display panel of the portable display device;

a backlight controller and a video processor connected to the display panel for displaying images;

an adaptive controller providing output signals to the backlight controller and the video processor;

a video analyzer providing a first input to the adaptive controller;

a remaining display time estimator providing a second input to the adaptive controller; and

a remaining program time estimator providing a third input to the adaptive controller, the remaining program time estimator determines a remaining program display time of one of a broadcast program and recorded program for displaying the images on the portable display device,

wherein the remaining display time estimator determines a remaining display time of the portable display device and controls the adaptive controller to adjust one of the backlight controller and the video processor based upon the determined remaining display time.

2. The system according to claim 1, wherein the remaining display time is determined based upon one of voltage of the battery power supply, current consumption of the battery power supply, and ambient temperature of the battery power supply.

3. The system according to claim 1, wherein the remaining display time is determined based upon one of usage rate of the battery power supply since the most recent full charge of the battery power supply, operational age of the battery power supply, and current capacity of the battery power supply.

4. The system according to claim 1, wherein the remaining program time estimator further controls the adaptive controller to adjust one of the backlight controller and the video processor based upon the determined remaining program display time.

5. The system according to claim 4, wherein the adaptive controller adjusts one of image brightness, image quality, and audio quality.

6. A portable display device, comprising:

a display panel;

a battery power supply powering a display panel of the portable display device;

an adaptive controller providing output signals to control the display panel;

a video analyzer providing a first input to the adaptive controller;

a remaining display time estimator providing a second input to the adaptive controller to adjust a display of images on the display panel based upon a determination of a remaining display time of the portable display device; and

a remaining program time estimator that determines a remaining program display time of one of a broadcast program and recorded program for displaying the images on the display panel.

7. The device according to claim 6, wherein the determination of a remaining display time is based upon one of voltage of the battery power supply, current consumption of the battery power supply, and ambient temperature of the battery power supply.

8. The device according to claim 7, wherein the determination of a remaining display time is based upon one of usage rate of the battery power supply since the most recent full charge of the battery power supply, operational age of the battery power supply, and current capacity of the battery power supply.

9. The device according to claim 6, wherein the remaining program time estimator further controls the adaptive controller to adjust the images on the display panel based upon the determined remaining program display time.

10. The device according to claim 9, wherein the adaptive controller adjusts one of image brightness, image quality, and audio quality.

11. The device according to claim 10, wherein the image quality includes one of color, tint, and contrast, and the audio quality includes one of tone and volume.

12. A method of reducing power consumption of a portable display device, comprising:

powering a display panel of the portable display device with a battery power supply to display images of a video program;

determining a remaining display time of the portable display device based upon the battery power supply;

adjusting the display images on the display panel based upon the remaining display time; and

determining a remaining program time of the video program and adjusting the display images on the display panel based upon the remaining program time.

13. The method according to claim 12, wherein the remaining display time is based upon one of voltage of the battery power supply, current consumption of the battery power supply, and ambient temperature of the battery power supply.

14. The method according to claim 12, wherein the remaining display time is based upon one of usage rate of the battery power supply since the most recent full charge of the battery power supply, operational age of the battery power supply, and current capacity of the battery power supply.

15. The method according to claim 12, wherein the adjusting the display images includes adjusting one of a backlight controller and a video processor.

16. The method according to claim 15, wherein the adjusting the display images includes adjusting one of brightness of the display images, quality of the display images, and audio of the display images.

17. The method according to claim 16, wherein the quality of the display images includes one of color, tint, and contrast, and the audio of the display images includes one of tone and volume.