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Optical keyboard

  • US 4,713,535 A
  • Filed: 09/04/1985
  • Issued: 12/15/1987
  • Est. Priority Date: 09/04/1985
  • Status: Expired due to Fees
First Claim
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1. Interface apparatus for a data processor comprising,a data entry terminal including an array of photosensors,a monitor for visually displaying data, said monitor associated with said data entry terminal,said photosensors being positioned in a X-Y coordinate system having a plurality of rows of photosensors parallel with a X-axis and a plurality of columns of photosensors parallel with a Y-axis for identifying each photosensor by a X and Y coordinate,said photosensors being actuated or not actuated between an active state and an inactive state in dependence upon receipt of energy from a source of energy to generate input signals,a microprocessor board having a data input terminal,data input lines electrically connecting said data input terminal in a first network to all of said sensors in said X-axis and in a second network to all of said photosensors in said Y-axis,said data input terminal on said microprocessor board receiving input signals from said photosensors upon receipt of energy representing a selected X and Y coordinate in said array of photosensors,data processing means for receiving output signals from said microprocessor board in response to said input signals from said actuated sensors as instructions to perform a task,means associated with said data processing means for transmitting data commands through said microprocessor board for display on said monitor,bidirectional data means connecting said data entry terminal, said microprocessor board, and said data processing means for simultaneous transfer of data between said data entry terminal and said data processing means,means on said microprocessor board for sensing said input signals from said array of photosensors sequentially row by row parallel to said X-axis to identify said photosensors aligned with said Y-axis being actuated,said microprocessor board including an output terminal connected to said data processing means for transmitting said output signals representing each actuated photosensor by X and Y coordinates to said data processing means, andsaid data processing means in response to said output signals from said microprocessor board being operable to perform said task in response to actuation of said photosensors when exposed to a source of energy.

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