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Matrix display device and its method of operation

  • US 5,892,504 A
  • Filed: 01/26/1994
  • Issued: 04/06/1999
  • Est. Priority Date: 07/17/1991
  • Status: Expired due to Fees
First Claim
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1. A matrix display device comprising sets of row and column address conductors, a row and column array of picture elements operable to produce a display, each of which comprises an electro-optic display element connected in series with a two terminal non-linear device exhibiting a threshold characteristic between a row conductor and a column conductor, and picture element drive means connected to the sets of address conductors for applying drive voltages to the picture elements comprising a scanning signal drive circuit for applying selection signals to the conductors of one set and a data signal drive circuit for applying data signals to the conductors of the other set, characterised in that the drive means includes a sensing circuit which is arranged to provide a control signal indicative of electrical current flowing in at least one address conductor of the one set in response to the application of selection signals to that address conductor, and a voltage control circuit to which the control signal is supplied for determining the drive voltages applied by the drive means to the picture elements in accordance with the value of the control signal.

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