×

Membrane-type touch panel employing insulating grid anti-short means

  • US 4,066,854 A
  • Filed: 11/22/1976
  • Issued: 01/03/1978
  • Est. Priority Date: 11/22/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. A transparent switch matrix to be carried on the face of a rigid insulator substrate, having a predetermined radius of curvature, and comprising:

  • a. a plurality of spaced apart conductive first strips firmly adhering to the face of the substrate;

    b. a transparent resilient insulating membrane having an undistorted contour substantially alike the predetermined contour, and attached about its periphery to the face of the substrate in a position matching the membrane contour to the substrate contour and spaced apart from the first strips thereon in a predetermined area of the membrane;

    c. a plurality of transparent, flexible, spaced apart conductive second strips firmly adhering to the resilient membrane surface facing the substrate, each of said second strips located in the area spaced apart from the first strips and thinner than the spacing therefrom, and each of said second strips crossing at least two first strips; and

    d. a thin insulating grip interposed between the first and second strips having within each crossover area between the first and second strips, a plurality of gaps permitting electrical contact between the first and second strips responsive to manual pressure at each crossover area.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×