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Color liquid crystal display employing dual cells driven with an EXCLUSIVE OR relationship

  • US 5,371,618 A
  • Filed: 01/05/1993
  • Issued: 12/06/1994
  • Est. Priority Date: 01/05/1993
  • Status: Expired due to Fees
First Claim
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1. A liquid crystal display device for generating three primary colors and combinations thereof including black and white, using at most two adjacent discrete subpixels which together form a full color pixel, comprising:

  • first, second and third optical assemblies which together define either one or at most two subpixels;

    said optical assemblies together include at least three liquid crystal display cells and cooperating optical components, said three liquid crystal display cells each capable of being in a select state and a non-select state at different times, and said liquid crystal display cells and said cooperating optical components being arranged in a manner which provides binary combinations of selected states and non-selected states, so that at least one of each of said colors is generated by one of said binary combinations of select states and non-select states;

    wherein at least one of said optical assemblies includes two liquid crystal display cells and their respective states are controlled by the logic of EXCLUSIVE OR (XOR) so that in either state in which both liquid crystal display cells are in the same state, a particular color will be blocked and in either state in which both liquid crystal display cells are in different states, said particular one of said colors will be transmitted therethrough.

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