Timer-controlled computer system power management

• US 5,721,936 A
• Filed: 07/24/1996
• Issued: 02/24/1998
• Est. Priority Date: 10/27/1993
• Status: Expired due to Fees

• Current Assignee: PDACO LIMITED
• Original Assignee: Elonex IP Holdings Limited
• Inventors: Kikinis, Dan, Dornier, Pascal
• Primary Examiner(s): Ray, Gopal C.
• Application Number:
  US08/687,162
• Time in Patent Office: 580 Days
• Field of Search: 395/750, 395/750.01, 395/750.05, 364/707, 364/492, 364/483, 307/31, 307/66, 340/825.06
• US Class Current: 713/323
• CPC Class Codes: G06F 1/32 Means for saving power
• CPC Class Codes: G06F 1/3203 Power management, i.e. event-based initiation of a power-saving mode
• CPC Class Codes: G06F 1/3215 Monitoring of peripheral devices

Abstract

A system for managing power levels for a general purpose computer having a standby and a full-power mode of operation provides apparatus and a method for monitoring times of user input and control routines for using the times of user input to calculate optimum times for initiating full power operation and standby mode. The control routines are configured to provide the optimum times to a real time clock that remains powered in the standby mode, which triggers switching elements to initiate full power and standby mode. In one embodiment of the system, startup and standby may be initiated either by user input or automatically by the power management system. Startup and standby initiation times may be different for different days and time periods based on both preprogrammed and calculated values.

Claims

1. A system for managing power levels for a general-purpose computer, comprising:

power management routines for providing multiple power levels;

power-switching circuitry for switching between power levels;

a real time clock; and

control logic routines operable for providing initiation times-of-day for changing the power levels;

wherein the real time clock provides a signal to the power-switching circuitry to initiate a change in power level based on a specific time of day.

2. A system for managing power levels for a general-purpose computer as in claim 1 further comprising input means including a microprocessor-based controller remaining powered in standby mode, wherein the microprocessor-based controller signals power-level changes in response to signals from one of the real time clock and the input means.

3. A system for managing power levels for a general-purpose computer as in claim 2 wherein the input means comprises a keyboard and the microprocessor-based controller is configured to initiate different power levels in response to specific keystroke signals input by a user.

4. A system for managing power levels for a general-purpose computer as in claim 2 wherein the logic routines are configured to monitor user input events and to adjust power-level changing times-of-day based on the user input events.

5. A system for managing power levels for a general-purpose computer as in claim 1 wherein power levels are selected for peripheral devices.

6. A general-purpose computer comprising:

power management routines for providing multiple power levels;

power switching circuitry for switching between power levels;

a real time clock; and

control logic routines operable for providing initiation times-of-day for changing the power levels;

wherein the real time clock provides a signal to the power-switching circuitry to initiate a change in power level based on a specific time of day.

7. A general-purpose computer as in claim 6 further comprising input means including a microprocessor-based controller remaining powered in standby mode, wherein the microprocessor-based controller signals power level changes in response to signals from one of the real time clock and the input means.

8. A general-purpose computer as in claim 7 wherein the input means comprises a keyboard and the microprocessor-based controller is configured to initiate different power levels in response to specific keystroke signals input by a user.

9. A general-purpose computer as in claim 7 wherein the logic routines are configured to monitor user input events and to adjust power level change times-of-day based on the user input events.

10. A general-purpose computer as in claim 6 wherein power levels are selected for peripheral devices.

11. A method for managing power levels for a general-purpose computer, comprising steps of:

monitoring user input through logic routines for determining startup initiation and standby initiation times-of-day based on times-of-day of the user input;

providing the initiation times-of-day to a real time clock; and

signaling for changing power levels by output from the real time clock to power switching circuitry adapted to change power levels for the general-purpose computer.

12. The method of claim 11 wherein the computer includes one or more input devices, such as a keyboard, a pointer device, and a ring indicator, and wherein in the step for monitoring user input the logic routines monitor the input devices in a pre-programmed time window immediately preceding the standby initiation times-of-day, and delay the initiation time for standby by a pre-programmed time duration if input activity is sensed in the time window.

13. The method of claim 11 further comprising a step for monitoring user input events through the logic routines, and adjusting the initiation times-of-day based on the times-of-day of the user input events.