Electrographic touch sensor and method of reducing bowed equipot

Telegraphy – Systems – Position coordinate determination for writing

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

382 13, G06K 928, G08C 2100

Patent

active

046616551

ABSTRACT:
A resistor electrode type touch sensor having enhanced area of linear response by reducing the bow in perimeters of the sensor and the method of accomplishing the same. A resistive coating is applied to one surface of a substrate. Within this coating orthogonal electrical fields are produced to give coordinates of a selected position. Overlying, but spaced from, the resistive coating is a flexible pick-off sheet having a conductive layer facing the resistive layer which will contact the resistive coating when the pick-off sheet is touched at a selected position. A resistance element is positioned proximate, but insulated from, the perimeter of the resistive coating. Electrodes of a selected effective length and spacing are located along selected paths proximate the edges of the resistive coating. Each electrode is attached to the resistive coating and connected to selected positions along the resistance element to provide selected voltages to the resistive coating. The effective length and spacing of the electrodes, and the positions of connection to the resistance element, are selected to produce an effective voltage gradient at the electrodes that progressively decreases from corners of the sensor to the center line of each edge of the sensor to counteract any voltage drop along the resistance element when potentials are applied thereto so as to substantially eliminate the bow of electrical fields produced in the resistive coating.

REFERENCES:
patent: 4493104 (1985-01-01), Lukis et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Electrographic touch sensor and method of reducing bowed equipot does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrographic touch sensor and method of reducing bowed equipot, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrographic touch sensor and method of reducing bowed equipot will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-478481

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.