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Browse Prior Art Database

Auto Dim Resume Method

IP.com Disclosure Number: IPCOM000109878D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Kato, A: AUTHOR

Abstract

Described herein is a technique for resuming from an auto dim state of a personal computer. This technique is effective even under the condition where a keyboard password is set in the personal computer. The auto dim function is for turning off automatically a display monitor, such as a CRT or a LCD panel, while the user is not using the personal computer, and for resuming the display monitor immediately after the user resumes the use of the personal computer.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 63% of the total text.

Auto Dim Resume Method

       Described herein is a technique for resuming from an auto
dim state of a personal computer.  This technique is effective even
under the condition where a keyboard password is set in the personal
computer.  The auto dim function is for turning off automatically a
display monitor, such as a CRT or a LCD panel, while the user is not
using the personal computer, and for resuming the display monitor
immediately after the user resumes the use of the personal computer.

      The figure shows how to resume the display monitor from the
auto dim state.

      The conventional resuming method, which uses a keyboard
interrupt signal as a trigger to turn on, is as follows:
      Step 1 :  The system is in the auto dim state.
                The display monitor is off.
      Step 2 :  The user starts to use a keyboard or a mouse 1.
      Step 3 :  A scan code is sent to the keyboard controller 3 via
a signal line 2.
      Step 4 :  The keyboard controller 3 receives the scan code and
raises an interrupt 4.
      Step 5 :  An auto dim controller 5 receives the interrupt 4 as
a trigger signal to resume.
      Step 6 :  The auto dim controller 5 turns on display monitor 6.

      Even if a keyboard password is set in the keyboard controller
3, the keyboard controller 3 does not raise the interrupt 4 in Step
4.  Then the display monitor is not turned on even if the user starts
to use the key...