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Multi-colored display device

  • US 4,241,339 A
  • Filed: 02/16/1978
  • Issued: 12/23/1980
  • Est. Priority Date: 02/16/1977
  • Status: Expired due to Term
First Claim
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1. A multi-colored display device comprising an array of N liquid crystal display cells arranged sequentially along a line of sight from an observer, said display cells having transparent electrodes deposited on the interior surfaces of opposed transparent plates, the first of said display cells towards the observer including a twisted nematic liquid crystal having an optical activity of 90°

  • and a first polarizing plate disposed on the surface of said first display cell, each of the N-1 remaining display cells including a guest-host liquid crystal and a dye, each said guest-host liquid crystal oriented in parallel with the axis of polarization of said first polarizing plate and a colored polarizing plate having an axis of polarization perpendicular to the axis of polarization of said first polarizing plate disposed on the exposed surface of the last display cell of said array.

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