Dual mode light valve display

  • US 4,294,518 A
  • Filed: 11/30/1978
  • Issued: 10/13/1981
  • Est. Priority Date: 11/30/1978
  • Status: Expired due to Term
First Claim
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1. A dual mode display comprising:

  • a front transparent window having a front and a rear surface, said rear surface having a first set of transparent electrically conductive electrodes arranged in a predetermined pattern disposed thereon;

    a rear transparent window disposed parallel to said, front window said rear window having a front surface and a rear surface, the front surface of said rear window further having deposited thereon a second set of electrically conductive transparent electrodes corresponding to said first set of electrically conductive transparent electrodes and in registration therewith;

    a semi-transparent reflective substrate disposed intermediate said front and rear windows and parallel thereto, said semi-transparent reflective substrate having an electrically conductive front surface facing said front window, and a rear surface facing said rear window, the rear surface of said semi-transparent substrate having disposed thereon a third set of transparent electrodes corresponding to said first set of transparent electrodes and in registration therewith;

    a first layer of electro-responsive material filling the space between said front window and said semi-transparent substrate, said first layer of electro-responsive material having a first optical density in the absence of an electrostatic field, and a second optical density in response to an electrostatic field applied there across;

    a second layer of electro-responsive material filling the space between said semi-transparent substrate and said rear window, said second layer of electro-responsive material having a third optical density in the absence of an electrostatic field and a fourth optical density in response to an electrostatic field applied thereacross;

    means for sealing said front window, said semi-transparent substrate and said rear window in said parallel relationship; and

    means for individually conducting electrical potentials to said first, second and third sets of electrically conductive transparent electrodes and the electrically conductive front surface of said semi-transparent reflective substrate.

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