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Tablet type coordinate input apparatus using elastic wave

  • US 4,665,282 A
  • Filed: 07/24/1985
  • Issued: 05/12/1987
  • Est. Priority Date: 07/25/1984
  • Status: Expired due to Fees
First Claim
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1. A tablet type coordinate input apparatus using an elastic wave, comprising:

  • medium means for propagating an elastic wave;

    elastic wave detecting means disposed on at least part of said medium means;

    elastic wave input means including elastic wave generating means for generating an elastic wave and for radiating the generating the generated elastic wave toward any desired position on the surface of said medium means; and

    means for receiving electrical signals indicative of a longitudinal elastic wave component of said radiated elastic wave detected by said detecting means, thereby providing coordinate information of the input position of said input means.

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