Browse Prior Art Database

Computer Display Distortion Test

IP.com Disclosure Number: IPCOM000122457D
Original Publication Date: 1991-Dec-01
Included in the Prior Art Database: 2005-Apr-04
Document File: 3 page(s) / 90K

Publishing Venue

IBM

Related People

Zotto, LA: AUTHOR

Abstract

Described is a software facility designed to evaluate time-dependent geometric distortion of a computer display screen while disk drives are being accessed.

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

Computer Display Distortion Test

      Described is a software facility designed to evaluate
time-dependent geometric distortion of a computer display screen
while disk drives are being accessed.

      It is not uncommon for a display monitor to display a certain
amount of distortion during disk drive accessing. The concept
described herein provides a software facility to test for undesirable
distortion attributed to time-dependent geometrical aspects of the
screen contents so that corrective measures may be taken to eliminate
the distortion.

      Three function screen displays are used:  Main menu; Test
pattern; and Line pattern screens.
      -    The main menu screen provides information regarding the
tests and instructions for running the tests.  It also provides three
operational options:  display of the text pattern; display of the
line pattern; and an exit procedure.
      -    The text pattern screen consists of twenty-four lines of
randomly selected and randomly spaced characters.  The data for this
screen is copied from a file that resides in the root directory of
the test diskette.  The twenty-fifth line displays a reverse image
that identifies the functions that are available while the pattern is
displayed.
      -    The line pattern contains a series of rectangles, the
first having vertical sides in columns one and seventy-nine and
horizontal top and bottom lines in rows one and twenty-four.  Each
successive rectangle is drawn with lines that are one column, or row,
that is closer to the center of the screen than the previous one.
There are twelve rectangles in all.  The twenty-fifth line has the
same content as...