Computer graphics processing and selective visual display system – Display peripheral interface input device – Touch panel
Patent
1997-02-20
1999-03-23
Mullen, Thomas
Computer graphics processing and selective visual display system
Display peripheral interface input device
Touch panel
178 1806, 345174, G09G 500
Patent
active
058866876
ABSTRACT:
A touch screen system includes a touch screen having a surface which is adapted to be touched by a user, a resistive substrate which spans the screen and has two opposite boundaries, and a pair of electrodes which are capacitively coupled to the resistive substrate adjacent the two opposite boundaries thereof. The electrodes are adapted to be electrically stimulated from a source to induce reference electrical parameters within the system. Appropriate components are provided for determining changes in electrical parameters at the electrodes as a result of the touch of a location of the screen by the user, and associated componentry is also provided for generating a signal corresponding to the location of the screen touched by the user. The touch screen of the system may be associated with the screen of a CRT for use or placed upon a tabletop for use as a cursor control pad or a keyboard.
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McKee Michael E.
Mullen Thomas
Tweel , Jr. John
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