Browse Prior Art Database

Pixel Intensity Control on a CRT Display

IP.com Disclosure Number: IPCOM000038669D
Original Publication Date: 1987-Feb-01
Included in the Prior Art Database: 2005-Jan-31

Publishing Venue

IBM

Related People

Authors:
Oh, SH Ramaswamy, S [+details]

Abstract

The intensity of each dot of a character display on a CRT (cathode ray tube) screen is controlled so that horizontal and vertical lines are formed to make a uniform character. In character display on a CRT screen, a horizontal line consists of consecutive dots in a row while a vertical line consists of a single dot in each row. A single dot looks less bright than consecutive dots because dots grouped together provide greater intensity. As a result, a horizontal line appears thicker than a vertical line as part of a character on a CRT screen. Accordingly, such horizontal and vertical lines appear to have unequal thicknesses and do not produce a uniform character to the viewer. Horizontal and vertical lines can be formed to produce a uniform character through controlling the intensity of each dot in the character.