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Reducing power usage in a personal computer

  • US 5,669,004 A
  • Filed: 04/02/1996
  • Issued: 09/16/1997
  • Est. Priority Date: 09/07/1994
  • Status: Expired due to Term
First Claim
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1. A method for reducing power usage in a personal computer comprisingrepetitively performing the following sequence of steps:

  • a. generating a wake-up signal, using a person sensor, in connection with a user beginning to interact with the computer,b. in response to the wake-up signal, switching the computer into a first mode in which at least a first portion of the computer is switched to a more fully powered mode, andc. keeping the computer in the first mode only as long as the user is interacting with the computer, and thereafter switching the computer into a second mode in which at least the first portion is switched to a less fully powered mode and in which the amount of power delivered respectively to the first portion and a second portion of the computer are based on the periods required for the portions respectively to return to fully operational states from being less fully powered.

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