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Touch panel input device

  • US 4,882,582 A
  • Filed: 11/16/1987
  • Issued: 11/21/1989
  • Est. Priority Date: 11/18/1986
  • Status: Expired due to Term
First Claim
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1. A touch panel input device provided with means for displaying an image including letters and with input keys superposed on the means for displaying and made of a transparent material, in which the image including letters is displayed at a position on the screen of a CRT display corresponding to an arrangement of the input keys, comprising:

  • means for displaying a part of the image that is displayed at a position corresponding to a subset of the input keys in a manner different from the remaining part of the image corresponding to input keys other than the subset of input keys, said subset of input keys including a number of input keys from which an operator is to make a selection;

    wherein the part of the image that is displayed at a position corresponding to the subset of input keys is displayed with greater emphasis, before an operator pushes down one of the keys, than a remaining part of the image corresponding to input keys which are not included in said subset, so that the operator can recognize the part of the image corresponding to the subset of input keys easier than said remaining part of the image.

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