Method and apparatus for selectively activating a computer display for power management

• US 5,822,599 A
• Filed: 12/17/1996
• Issued: 10/13/1998
• Est. Priority Date: 12/17/1996
• Status: Expired due to Term

• Current Assignee: Intel Corporation
• Original Assignee: Intel Corporation
• Inventors: Adams, Robert, Kidder, Jeff
• Primary Examiner(s): Ray, Gopal C.
• Application Number:
  US08/768,042
• Time in Patent Office: 665 Days
• Field of Search: 395/750.01, 395/750.03, 395/750.05, 395/750.06, 395/750.08, 364/707, 345/211, 345/214, 315/386
• US Class Current: 713/324
• CPC Class Codes: G06F 1/32 Means for saving power
• CPC Class Codes: G06F 1/3265 Power saving in display device
• CPC Class Codes: G06F 3/147 using display panels
• CPC Class Codes: G09G 2310/0232 Special driving of display border areas
• CPC Class Codes: G09G 2310/04 Partial updating of the display screen
• CPC Class Codes: G09G 2320/0686 with two or more screen areas displaying information with different brightness or colours
• CPC Class Codes: G09G 2330/021 Power management, e.g. power saving
• CPC Class Codes: Y02D 10/00 Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

A method and apparatus for exclusively activating pixels in an active area of a computer display when a computer system is operating in a power management mode. In one embodiment, the pixels within the active area of the display are exclusively activated by providing less power to the pixels outside of the active area of the display.

Claims

1. A computer system comprising:

a display; and

a first device configured to exclusively activate pixels in an active area of said display as determined by an operating system of said computer system, said first device configured to automatically exclusively activate pixels in an active area of said display in response to said computer system receiving power from an alternative power source.

2. The computer system of claim 1 wherein less power is provided to an area outside said active area of said display.

3. The computer system of claim 2 wherein said first device is configured to be operable in a plurality of modes, said first device configured to exclusively activate pixels in said active area of said display when said first device is operating in a power management mode.

4. The computer system of claim 3 wherein said first device is configured to expand said active area of said display in response to an area outside said active area being updated.

5. The computer system of claim 3 wherein said first device is configured to activate a local area outside said active area in response to said local area being updated.

6. A computer-implemented method comprising the steps of:

switching into a power management mode; and

exclusively activating pixels in an active area of a computer display as determined by an operating system, said exclusively activating pixels is performed automatically in response to a computer system receiving power from an alternative power source.

7. The computer-implemented method of claim 6 wherein the step of exclusively activating pixels includes providing less power to an area outside said active area of said display.

8. The computer-implemented method of claim 7 the step of exclusively activating pixels in said active area of said computer display is performed in response to the step of switching into a power management mode.

9. The computer-implemented method of claim 8, further including the step of expanding said active area of said display in response to an area outside said active area being updated.

10. The computer-implemented method of claim 9 further including the step of activating a local area outside said active area in response to said local area being updated.

11. A computer-readable medium having stored thereon a plurality of instruction including a first set of instruction, said first set of instruction when executed by a processor, cause said processor to perform the steps comprising of:

switching into a power management mode; and

exclusively activating pixels in an active area of a computer display as determined by an operating system of a computer system, said exclusively activating pixels is performed automatically in response to said computer system receiving power from an alternative power source.

12. The computer-readable medium of claim 11 wherein the step of exclusively activating pixels includes providing less power to an area outside said active area of said display.

13. The computer-readable medium of claim 12, wherein the step of exclusively activating pixels in said active area of said computer display is performed in response to the step of switching into a power management mode.

14. The computer-readable medium of claim 13, wherein said first set of instructions further include additional instructions, when executed by said processor, cause said processor to perform the step of expanding said active area of said display in response to an area outside said active area being updated.

15. The computer-readable medium of claim 13, wherein said first set of instructions further include additional instructions, which when executed by said processor, cause said processor to perform the step of activating a local area outside said active area in response to said local area being updated.