Browse Prior Art Database

Touch Screen With Combined Force And Position Sensing

IP.com Disclosure Number: IPCOM000037765D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Christopher, RJ: AUTHOR [+3]

Abstract

Disclosed is a method of sensing pushes or touches independently of measuring position information with a touch screen. The result is greatly improved usability and simplified emulation of "mice" and other input devices.

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Touch Screen With Combined Force And Position Sensing

Disclosed is a method of sensing pushes or touches independently of measuring position information with a touch screen. The result is greatly improved usability and simplified emulation of "mice" and other input devices.

A touch system combines a touch screen technology which does not depend on substantial applied force, used for position determination, and a force sensor. The position technology can use capacitive, optical, resistive, ultrasonic, or other methods, and produces position information continuously or at frequent intervals. The force sensor is included in the device such that forces applied by the pointer produce a signal which is independent of the position information. Either or both sensing technologies can be built into or added onto a display device.

Actions are indicated by applying force after the pointer is positioned as desired by the user. This allows very accurate pointer positioning with independent control over when actions are to take place. The position information, when combined with the force information, can be used to control functions which are normally associated with mice and other devices, and as such, facilitates complete emulation of such devices.

Disclosed anonymously.

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