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Electro-optical devices

  • US 3,932,024 A
  • Filed: 08/16/1973
  • Issued: 01/13/1976
  • Est. Priority Date: 08/18/1971
  • Status: Expired due to Term
First Claim
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1. An optical display device comprising first and second transparent transposed plates, first and second electrodes mounted on the facing surfaces of said first and second plates, respectively, an insulating spacer interposed between said plates, a nematic liquid crystal filled between said first and second plates and within said insulating spacer, said first electrode being transparent and said second electrode being partially reflective having a light transmittance in the range of 30% to 70%, said second electrode being composed of an opaque reflective material with a plurality of fine holes formed therein, the number of holes being determined by the light transmittance desired, said optical display device being adapted to be energized by a D.C. source and wherein said first and second electrodes are a positive electrode and a negative electrode, respectively, said negative electrode comprising as an essential component titanium.

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