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Touch panel and operating system

  • US 4,186,392 A
  • Filed: 07/28/1978
  • Issued: 01/29/1980
  • Est. Priority Date: 07/28/1978
  • Status: Expired due to Term
First Claim
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1. A touch panel display system comprisinga display device for displaying information,a touch panel in operative relation with said display device,said touch panel including(1) an insulating support plate having an inner surface and an outer surface,(2) an array of rows and columns of first conductive areas on the inner surface of said support plate, each row of said first conductive areas being connected by a row conductor to a row terminal,(3) an array of rows and columns of second conductive areas on the outer surface of said support plate, each second area overlying a first area and being capacitively coupled thereto, each column of said second conductive areas being connected by a column conductor to a column terminal,electronic circuit means coupled to said touch panel includingfirst means coupled to said column conductors for applying a strobe signal to each in turn and continuously,second means coupled to each row conductor for receiving an output signal when one of said second conductive areas is touched by an operator,third means for generating coordinate information from said output signal, andfourth means for coupling said coordinate information to a display system wherein information is stored for display on said display device.

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