Force activated touch screen measuring deformation of the front

Details Force activated touch screen measuring deformation of the front Force activated touch screen measuring deformation of the front

1995-02-15

1996-07-30

Chin, Stephen

Telegraphy

Systems

Position coordinate determination for writing

178 18, 178 19, 345156, 345173, 345174, 345179, G08C 2100, G09G 302

Patent

active

055413722

ABSTRACT:
A touch screen device includes a panel; a sensor coupled to the panel for detection of a force applied to the panel and a data processor coupled to the sensor for processing data transmitted by the sensor upon detection of the force. The sensor is provided to be co-deformable with the panel for detecting a deformation of the panel itself as a result of the force being applied. This avoids the use of a rigid frame as in conventional devices, saving weight, costs and components, and reducing manufacturing problems. The sensor means may comprise strain gauges that are physically integrated with the panel. Combined with a display such device presents a minimum parallax.

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IBM Technical Disclosure Bulletin, vol. 34, No. 7B, Dec. 1991, New York. pp. 384-385, "Method of Continuously Computing The Point of Contact on a Touch-sensitive Screen with Piezosensors".

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