Title: Alphanumeric display means for computer-linked typewriter consoles using a matrix array of light-emitting diodes (led's)

Abstract: The present invention relates to an alphanumeric display unit means for improving the identification quantities at selected key buttons of a computer-linked typewriter console through usage of light-emitting identification indicia attached adjacent to or at the selected key buttons. Each light-emitting display is in matrix format consisting of a set of light-emitting diodes (LED's) arranged in orthogonal rows and columns. Energization of the LED's is by means of digital control circuitry. Result: a repetitive light-emitting display in matrix format in a configuration corresponding to an alphanumeric indicium for which display is sought.

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Inventors: Mueller, Thomas Delbert (Orinda, CA, US)

Application Number: 413280
Filing Date: 1973-11-05
Publication_date: 1976-01-20
Assignee: Chevron Research Company (San Francisco, CA)
Primary Class(es): 345/46 341/22, 345/59, 400/477, 400/493
Other Classes:
US Patent Ref:

3644922	Feb, 1972	James et al.	340/380.
3670322	Jun, 1972	Mallebrein	340/365.
3786499	Jan, 1974	Jankowski et al.	340/380.

Other Refs:
Primary Examiner: Curtis, Marshall M.
Assistant Examiner:
Attorney: Freeland, Jr.; R. L., Messner; H. D.