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EL DISPLAY PANEL DRIVING METHOD

  • US 20100277401A1
  • Filed: 07/13/2010
  • Published: 11/04/2010
  • Est. Priority Date: 04/26/2002
  • Status: Active Grant
First Claim
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1. An EL display apparatus comprising:

  • gate signal lines and source signal lines which are arranged so as to intersect each other;

    a display screen having pixels arranged in a matrix; and

    a source driver circuit supplying video signal to said source signal lines,wherein;

    said pixel has an EL element, a driver transistor which supplies a light-emitting current to said EL element, a first condenser, a first switching transistor and a second switching transistor;

    said first condenser has a first terminal and a second terminal;

    said first switching transistor has a first terminal, a second terminal and a gate terminal;

    said second switching transistor has a first terminal, a second terminal and a gate terminal;

    said gate signal lines include a first gate signal line and a second gate signal line;

    said first terminal of said first switching transistor is connected to a gate terminal of said driver transistor;

    said second terminal of said first switching transistor is connected to a first electrode or wiring to which a first voltage is impressed;

    said first gate signal line is connected to said gate terminal of said first switching transistor;

    said first terminal of said first condenser is connected to said gate terminal of said driver transistor;

    said second terminal of said first condenser is connected to a second electrode or wiring to which a second voltage is impressed;

    said first voltage is impressed to said gate terminal of said driver transistor by applying a turn-on-voltage to said first gate signal line,said first terminal of said second switching transistor is connected to said source signal line;

    said second gate signal line is connected to said gate terminal of said second switching transistor;

    said second switching transistor is turned on by applying a turn-on-voltage to said second gate signal line;

    a video signal applied to said source signal line is output from said second terminal of said second switching transistor and is supplied to said drive transistor;

    after the turn-on-voltage is applied to said first gate signal line and said first voltage is applied to said driver transistor, the turn-on-voltage is applied to said second gate signal line and said video signal is supplied to said driver transistor.

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