Browse Prior Art Database

PRESSURE SENSITIVE TOUCH PANEL

IP.com Disclosure Number: IPCOM000025989D
Original Publication Date: 1989-Aug-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 73K

Publishing Venue

Xerox Disclosure Journal

Abstract

Today's Touch panel technologies such as Capacitive, Resistive membrane, Surface Acoustic, and Optical (IR-LED) have various draw backs such as cost probe restrictions: size or type, susceptible to surface contamination, easily damaged or can be inadvertently activated by stimuli other than the operator such as insects.

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XEROX DISCLOSURE JOURNAL

PRESSURE SENSITIVE TOUCH PANEL Proposed Classification Timothy M. Minerd U.S. C1.3101232

Int. C1. HOlr 39/08

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Load cells/ Strain guage

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FIG. I

mounting CRT and (4) cells Load / u 2 FIG. GCRT

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: Load cells (4) I

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Load cells (4)

Monitor Chassis

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FIG. 3

Volume 14 Number 4 July/August 1989 171

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PRESSURE SENSITIVE TOUCH PANEL (Cont'd)

Today's Touch panel technologies such as Capacitive, Resistive membrane, Surface Acoustic, and Optical (IR-LED) have various draw backs such as cost probe restrictions: size or type, susceptible to surface contamination, easily damaged or can be inadvertently activated by stimuli other than the operator such as insects.

A solution is to use standard load cells, wither semiconductor or foil type, mounted to the corner of an appropriate size piece of glass with references to Figure 1. The force is then measured at each corner by the load cells when a load is applied. By determining the relative magnitude of the forces with respect to each other, the point at which the load was applied can be determined. This can be done inde endent of the probe that applied the force

magnitude the and force has been applied. of the applied P orce can be used to determine that a valid

This pressure/force sensitive touch panel could also be applied to a CRT at the mounting points of the CR...