Passive display module and system

  • US 4,436,378 A
  • Filed: 10/02/1981
  • Issued: 03/13/1984
  • Est. Priority Date: 12/31/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. A passive display module for use in a display system having a source of illumination and a projection lens comprising:

  • a counter electrode,a display electrode area,a liquid filled cell having a transparent top portion and a wall surrounding said display electrode area,a side light guide coextensive with said display electrode area in one dimension, said guide having an inner face forming at least a part of said wall and an outer face for receiving light from an external source, said guide having a reflective upper surface inclined downwardly towards said display electrode area.

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