Touch sensor input system for a computer display

Details Touch sensor input system for a computer display Touch sensor input system for a computer display

1995-08-10

1997-12-02

Hjerpe, Richard

Computer graphics processing and selective visual display system

Display peripheral interface input device

Touch panel

G09G 500

Patent

active

056941544

ABSTRACT:
A conductive coating on the front surface of the display screen is used to determine the position of an object, such as a user's finger, touching the screen. Sensors at the edge of the conductive coating detect changes in the level of the ambient field pickup when the user's finger touches the display screen. The conductive coating may optionally be divided into blocks with separate connections to each block, or may have a resistivity profile so as to allow full X and Y co-ordinate determination of the position of the finger. Also, optionally, a stylus generating an electromagnetic field when in contact with the display may be used in place of the finger.

REFERENCES:
patent: 4293734 (1981-10-01), Pepper, Jr.
patent: 4374381 (1983-02-01), Ng et al.
patent: 4698460 (1987-10-01), Krein
patent: 4771276 (1988-09-01), Parks
patent: 5053757 (1991-10-01), Meadows
patent: 5159159 (1992-10-01), Asher

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