Browse Prior Art Database

Screen Programmable Power On Off Switch for Personal Computers

IP.com Disclosure Number: IPCOM000103622D
Original Publication Date: 1993-Jan-01
Included in the Prior Art Database: 2005-Mar-18
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Fado, F: AUTHOR [+3]

Abstract

Described is a hardware implementation for personal computers (PCs) to eliminate the need for a physical power on/off switch. The design uses the screen as the mechanism to turn the PC power on or off. The mechanism is also programmable.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Screen Programmable Power On Off Switch for Personal Computers

       Described is a hardware implementation for personal
computers (PCs) to eliminate the need for a physical power on/off
switch.  The design uses the screen as the mechanism to turn the PC
power on or off.  The mechanism is also programmable.

      In prior art, a physical on/off switch was necessary to control
the power to the PC.  The switch proved to be cumbersome particularly
in small PCs.  The concept described herein provides for control of
the power to the PC without the need for a physical switch by using
the touch screen as the media.  The user touches the screen at a
programmed power-on area with a stylus and, upon removal of the
stylus, the device powers on.  Once the system is running, a
power-off function is similarly provided under the control of an
application program.  The touch area for power on/off is programmable
using the same coordinate system for screen addressing.

      When a system is powered-off, the basic input/output system
(BIOS) support enters a suspend mode and the touch panel hardware
enters a sleep mode awaiting a touch interrupt.  Upon detection of a
touch interrupt, the touch panel controller tests to determine if the
touch coordinates are within the power-on touch area.  If the
coordinates are in the range, the system is powered on and resumes
operation.

      The touch driver within the PC provides a standard mouse
interface.  Upon power-on, the BIOS support discards the first touch
event so that any application currently interfacing with the touch
panel does not have to change because of this support.  This provides
for a completely transparent sup...