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PIXEL CIRCUIT, ORGANIC ELECTRO-LUMINESCENT DISPLAY APPARATUS, AND METHOD OF DRIVING THE SAME

  • US 20110164071A1
  • Filed: 09/23/2010
  • Published: 07/07/2011
  • Est. Priority Date: 01/04/2010
  • Status: Active Grant
First Claim
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1. A pixel circuit comprising:

  • a light emitting device comprising a first electrode and a second electrode;

    a driving transistor comprising;

    a first electrode;

    a second electrode; and

    a gate electrode, the driving transistor for outputting a driving current according to a voltage applied to the gate electrode of the driving transistor;

    a first capacitor comprising a first terminal and a second terminal, the second terminal of the first capacitor being coupled to the gate electrode of the driving transistor;

    a second capacitor comprising a first terminal coupled to the gate electrode of the driving transistor and a second terminal coupled to the first electrode of the light emitting device;

    a second transistor comprising;

    a first electrode coupled to the gate electrode of the driving transistor;

    a second electrode coupled to the first electrode of the driving transistor; and

    a gate electrode;

    a third transistor for applying a first power supply voltage to the first electrode of the driving transistor in response to an emission control signal;

    a fourth transistor comprising a first electrode for receiving to a data signal and a second electrode coupled to the first terminal of the first capacitor;

    a fifth transistor comprising;

    a first electrode for receiving a reference voltage;

    a second electrode coupled to the first terminal of the first capacitor; and

    a gate electrode; and

    a sixth transistor comprising;

    a first electrode for receiving a first voltage;

    a second electrode coupled to the gate electrode of the driving transistor; and

    a gate electrode,wherein the driving transistor and the second to sixth transistors are N-type transistors.

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