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Electro-optic passive display device and method for its manufacture

  • US 4,118,111 A
  • Filed: 03/30/1977
  • Issued: 10/03/1978
  • Est. Priority Date: 04/02/1976
  • Status: Expired due to Term
First Claim
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1. An electro-optic display device comprising, a substrate with an electrically conductive track, a display cell with an electrically conductive track spaced from the substrate track, an electrical control circuit connected to the substrate track, a lighting device positioned behind the display cell, the lighting device including a generally plate-shaped light guiding member with two opposite edges and formed of transparent insulating material, each said opposite edge having a respective thickened portion, one of said thickened portions forming an enclosure for a light source, each said thickened portion being coated with a respective conductive track, said thickened portions being interposed between said cell and said substrate, the conductive tracks of said thickened portions being in electrical contact with the respective conductive tracks of the cell and the substrate to render the same electrically connected.

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