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Electro-transmissive display device

  • US 4,023,890 A
  • Filed: 07/31/1975
  • Issued: 05/17/1977
  • Est. Priority Date: 08/07/1974
  • Status: Expired due to Term
First Claim
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1. In a display device of the light transmitting type, wherein the device includes at least one pattern having a periphery and central portion within the periphery;

  • first and second substrates of insulating material having inner surfaces facing one another.a layer of light transmitting material disposed between the substrates;

    a plurality of segment electrodes deposited on the inner surface of the first substrate between the first substrate and the layer of light transmitting material wherein each segment electrode contains the pattern having a periphery and central portion;

    a common electrode deposited on the inner surface of the second substrate between the second substrate and the layer of light transmitting material; and

    a plurality of electro-conductive sections forming segment electrodes, wherein said sections adjacent the periphery have a higher distribution density than those forming the central portions, so that the periphery of the pattern is brighter than the central portion and the pattern has the same visual impact as a pattern with a constant distribution density.

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