Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Display Test Pattern

IP.com Disclosure Number: IPCOM000046758D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 66K

Publishing Venue

IBM

Related People

Hatcher, SC: AUTHOR [+2]

Abstract

A plurality of display test patterns constructed of individual picture elements (pels) according to the patterns shown above are generated on the face of a cathode ray tube (CRT) display for use in assessing the performance quality of the CRT display system without the need for access to the internal circuits of the system. The circles in the above pattern should be accurately reproduced as brightened pels in each of the patterns on the CRT screen. Where spaces are shown between horizontal rows and vertical columns of circles in the above pattern, the spaces should also be present on the CRT screen. In the above pattern the sailboat 1 and snowflake 2 are useful in assessing delay with respect to video amplifier response.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 62% of the total text.

Page 1 of 2

Display Test Pattern

A plurality of display test patterns constructed of individual picture elements (pels) according to the patterns shown above are generated on the face of a cathode ray tube (CRT) display for use in assessing the performance quality of the CRT display system without the need for access to the internal circuits of the system. The circles in the above pattern should be accurately reproduced as brightened pels in each of the patterns on the CRT screen. Where spaces are shown between horizontal rows and vertical columns of circles in the above pattern, the spaces should also be present on the CRT screen. In the above pattern the sailboat 1 and snowflake 2 are useful in assessing delay with respect to video amplifier response. These areas contain different dot on/off sequences to detect the degree of saturation in the video amplifier. Rise/fall times in the video amplifier are assessed with respect to the IBAR pattern 3. IBAR 3 and snowflake 2 are useful in assessing the vertical/horizontal relative line luminance performance of the video amplifier. Horizontal calumet 4 and snowflake 2 are used in judging the single dot/multi-dot relative luminance performance of the video amplifier. Static dot shift relative to high voltage regulation is assessed by viewing checker patterns 5 and snowflake 2. The vertical lines in the border of the entire pattern above are used in judging field size integrity. Dynamic dot movement is assessed with reference to che...