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Indicating method and apparatus for digitizer menu portions

  • US 4,509,046 A
  • Filed: 07/02/1982
  • Issued: 04/02/1985
  • Est. Priority Date: 07/30/1981
  • Status: Expired due to Fees
First Claim
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1. Digitizer apparatus comprising a menu element having a face divided into a plurality of blocks, each block being responsive to activation by an operator to produce a corresponding command signal for control of a data processing device having a plurality of modes of operation, a plurality of cells positioned behind the face, each cell corresponding to one of the plurality of blocks, a plurality of light sources of different colors associated with each cell, and control means for controlling of the illumination of each of the plurality of light sources so as to selectively illuminate at least one light source to indicate a command signal to be provided in the next step in a series of sequential processing steps to be carried out in a selected one of the plurality of modes of operation of the data processing device.

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