Luminance suppression power conservation

• US 9,659,544 B2
• Filed: 10/12/2009
• Issued: 05/23/2017
• Est. Priority Date: 05/04/2005
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Plut, William J.
• Primary Examiner(s): Bukowski, Kenneth
• Application Number:
  US12/577,474
• Publication Number:
  US 20100026735A1
• Time in Patent Office: 2,780 Days
• Field of Search: 345204-215, 345690-699, 345 89, 345102, 345 77
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: G09G 3/20 for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T
• CPC Class Codes: G09G 5/024 using colour registers, e.g. to control background, foreground, surface filling G09G5/06 takes precedence

Abstract

Described herein are systems and methods that reduce power consumption for an electronics device including a display. The systems and methods alter video information in a display area and reduce power for a display device when a graphics item is enlarged and the enlargement threatens to increase perceived luminance for the graphics item or increase aggregate luminance for the display area. Altering the video information reduces the luminance of video information in at least the graphics item when enlarged. This may offset perceived luminance gained by human visual processing when an item increases in size. If the graphics item is smaller than the display area after enlargement, then other video information in the display area may also be altered to conserve power.

Claims

1. A method for reducing power consumed by an electronics device that includes a display device, the method comprising:

displaying initial video information that contributes to an initial aggregate luminance output by the display device;

determining the initial aggregate luminance output by the display device as the display device displays the initial video information;

in response to an indication for output of new video information on the display device, determining a new aggregate luminance to be output by the display device if the display device were to display the new video information;

determining whether the new aggregate luminance for the display device is greater than the initial aggregate luminance;

altering the new video information so as to produce altered video information that contributes to a reduced aggregate luminance for the display device that is less than or equal to the initial aggregate luminance when the new aggregate luminance for the display device is greater than the initial aggregate luminance; and

displaying the altered video information, wherein the display device consumes less power when displaying the altered video information than would be consumed for display of the new video information.

2. The method of claim 1 wherein the reduced aggregate luminance is less than the initial aggregate luminance and consumes less power for the display device than would be consumed for display of the initial video information.

3. The method of claim 1 wherein the reduced aggregate luminance is within an error band of the initial aggregate luminance.

4. The method of claim 1 wherein the new video information does not occupy an entire display area for the display device, and further comprising altering other video information in the display area to reduce an aggregate luminance for the display area.

5. The method of claim 1 wherein the new video information includes increasing the size of a graphics item.

6. The method of claim 5 wherein increasing the size of the graphics item includes initiating the graphics item.

7. The method of claim 6 wherein initiating the graphics item includes initiating a program corresponding to the graphics item.

8. The method of claim 5 wherein the graphics item includes a graphics window a portion of which includes a central white portion.

9. The method of claim 1 wherein the display device is an LCD device and reducing power consumption for the display device includes changing a backlight to a lower backlight luminance level and altering the video information includes changing the transmissivity of the video information.

10. The method of claim 9 wherein the LCD device includes a single backlight.

11. The method of claim 1 wherein the display device is an OLED device and altering the video information includes reducing a red, green or blue pixel value that also reduces power consumption for the OLED device.

12. The method of claim 1, further comprising:

monitoring a user activity,

wherein the altering of the new video information alters at least a portion of the new video information according to the user activity.

13. The method of claim 12, wherein a magnitude and timing of the altering of the at least the portion of the new video information is based at least in part on the user activity.

14. The method of claim 1, wherein the altering of the video information is selectively applied to at least a portion of the video information corresponding to a graphics item according to a type of the graphics item.

15. The method of claim 1, wherein the altering of the video information is selectively applied to at least a portion of the video information corresponding to a graphics item according to a color of the graphics item.

16. The method of claim 15, wherein the altering of the video information is applied to portions of the video information that are to be displayed as white.

17. A method for reducing power consumed by an electronics device that includes a display device, the method comprising:

determining an aggregate luminance reference for output of video information by the display device;

maintaining aggregate luminance output on the display device less than or about equal to the aggregate luminance reference by altering new video information for output on the display device to produce altered video information that includes a reduced aggregate luminance that is less than or about equal to the aggregate luminance reference; and

displaying the altered video information, wherein the reduced aggregate luminance consumes less power for the display device than would be consumed without the video information alteration,

wherein the aggregate luminance reference is an initial aggregate luminance output by the display device as the display device displays an initial video information.

18. The method of claim 17, wherein the aggregate luminance reference is determined according to a luminance of a graphics item corresponding to a particular type of graphics item.

19. The method of claim 17, further comprising:

monitoring user activity,

wherein the aggregate luminance reference is determined according to the user activity.

20. The method of claim 17 further comprising receiving the aggregate luminance reference from user input provided by a person using a graphics control.

21. The method of claim 17 wherein the reduced aggregate luminance is within an error band of the aggregate luminance reference.

22. The method of claim 17 wherein the new video information does not occupy an entire display area for the display device and other video information in the display area is also altered to reduce luminance of the other video information.

23. The method of claim 17 wherein the display device is an LCD device and reducing power consumption for the display device includes changing a backlight to a lower backlight luminance level and altering the video information includes changing the transmissivity of the video information.

24. The method of claim 23 wherein the LCD device includes a single backlight.

25. The method of claim 17 wherein the display device is an OLED device and altering the video information includes reducing a red, green or blue pixel value that also reduces power consumption for the OLED device.

26. The method of claim 17 further comprising:

increasing size of a graphics item to create a larger graphics item; and

altering video information for the larger graphics item to produce an altered larger graphics item that includes the reduced luminance.

27. The method of claim 17 further comprising determining a new aggregate luminance to be output by the display device if the display device were to display the new video information,

wherein new video information for output on the display device is altered to produce the altered video information if the new aggregate luminance is greater than the aggregate luminance reference.

28. A non-transitory computer readable medium including instructions executable by a processor for reducing power consumed by an electronics device that includes a display device, the non-transitory computer readable medium comprising:

instructions for displaying initial video information that contributes to an initial aggregate luminance output by the display device;

instructions for determining the initial aggregate luminance output by the display device as the display device displays the initial video information;

instructions for, in response to an indication for output of new video information on the display device, determining a new aggregate luminance to be output by the display device if the display device were to display the new video information;

instructions for determining whether the new aggregate luminance for the display device is greater than the initial aggregate luminance;

instructions for altering the new video information so as to produce altered video information that contributes to a reduced aggregate luminance for the display device that is less than or equal to the initial aggregate luminance when the new aggregate luminance for the display device is greater than the initial aggregate luminance; and

instructions for displaying the altered video information, wherein the display device consumes less power when displaying the altered video information than would be consumed for display of the new video information.