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Graphic Display Valuator

IP.com Disclosure Number: IPCOM000047127D
Original Publication Date: 1983-Sep-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Clarke, DA: AUTHOR [+2]

Abstract

Valuators are usually rotary dials, used to increment or decrement the parameters controlling a computer graphics display. Up to eight such dials may be used with a display. The expense of such dials may be avoided by implementing the valuator function with standard alphanumeric keyboard keys, two keys replacing one dial. The two keys may be alternate shift keys, and each key must be of the typamatic or make-break kind. One key of each pair increments the display parameter, the other decrements it. Coarse and fine adjustment of the parameter is given by providing three adjustment rates. A single keystroke makes a unit change. If a key is depressed for a short period between 0.6 second and 2.6 second a fine adjustment rate is provided at 20 units per second. If the key is depressed for more than 2.

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Graphic Display Valuator

Valuators are usually rotary dials, used to increment or decrement the parameters controlling a computer graphics display. Up to eight such dials may be used with a display. The expense of such dials may be avoided by implementing the valuator function with standard alphanumeric keyboard keys, two keys replacing one dial. The two keys may be alternate shift keys, and each key must be of the typamatic or make-break kind. One key of each pair increments the display parameter, the other decrements it. Coarse and fine adjustment of the parameter is given by providing three adjustment rates. A single keystroke makes a unit change. If a key is depressed for a short period between 0.6 second and 2.6 second a fine adjustment rate is provided at 20 units per second. If the key is depressed for more than 2.6 seconds, then a coarse adjustment rate of 100 units per second is provided.

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