Browse Prior Art Database

Three Power State for Battery Operated Personal Computers

IP.com Disclosure Number: IPCOM000113359D
Original Publication Date: 1994-Aug-01
Included in the Prior Art Database: 2005-Mar-27
Document File: 2 page(s) / 42K

Publishing Venue

IBM

Related People

Goldwyn, R: AUTHOR [+2]

Abstract

Described is a hardware implementation to provide three power states for battery operated portable type Personal Computers (PCs), but will appear as two power states. A Standby state is incorporated into the logic of the system.

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This is the abbreviated version, containing approximately 72% of the total text.

Three Power State for Battery Operated Personal Computers

      Described is a hardware implementation to provide three power
states for battery operated portable type Personal Computers (PCs),
but will appear as two power states.  A Standby state is incorporated
into the logic of the system.

      The concept provides Off and On switching capability and in
addition incorporates into the logic of the system a Standby state to
give the user Off, On and Instant On availability.  The technique
provides the three power states, but they appear to the user as two.
If the PC remains unused for a predefined period of time, the logic
then turns Off all functions so as to remove all load on the power
source, such as batteries.

      When a user presses the On button, after the system has been
Off for a period of time, the operation is delayed until all the
components reach their operating potential.  In prior art, a separate
Standby switch was actuated by the operator to enable the operator to
have an Instant On capability.  The operator was required to make the
decision whether to select the Standby switch, or the Off switch when
operations were suspended.

      The concept described herein relieves the user of making the
decision whether to press the Off switch, or the Standby switch.  The
separate Standby switch is eliminated such that when the operator
turns the PC Off, the logic supports a sufficient power level, for a
pre-set period of time, so as to eli...