Browse Prior Art Database

Method for Generating a Graphic Cursor on a Plasma Display

IP.com Disclosure Number: IPCOM000052722D
Original Publication Date: 1981-Jul-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Thompson, DR: AUTHOR

Abstract

In a storage plasma panel display, a graphic cursor in the form of a cross-hair may be displayed and moved about the screen by a joystick or under program control by selectively writing and erasing the cross-hair only in even-X and even-Y picture element (pel) addresses. The stored display data is maintained in the remaining 75% of the addressable pel positions. Thus, the cross-hair can move throughout the screen of stored data without damaging (overwriting or erasing) the basic image.

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Method for Generating a Graphic Cursor on a Plasma Display

In a storage plasma panel display, a graphic cursor in the form of a cross- hair may be displayed and moved about the screen by a joystick or under program control by selectively writing and erasing the cross-hair only in even-X and even-Y picture element (pel) addresses. The stored display data is maintained in the remaining 75% of the addressable pel positions. Thus, the cross-hair can move throughout the screen of stored data without damaging (overwriting or erasing) the basic image.

Stored data in even-even addresses, if any, that is "cosmetically damaged" by moving entities may be repaired by regenerating those addresses from a coded or non-coded buffer including no more than 25% of the image content. However, image readability and line continuity of the stored data remains even if not repaired.

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