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DISPLAY DEVICE AND DRIVING METHOD THEREOF

  • US 20070063935A1
  • Filed: 09/11/2006
  • Published: 03/22/2007
  • Est. Priority Date: 09/15/2005
  • Status: Active Grant
First Claim
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1. A display device comprising:

  • a plurality of data lines for supplying a data current;

    a plurality of scan lines for transmitting a selection signal; and

    a pixel portion comprising a plurality of pixel circuits connected to the plurality of data lines and the plurality of scan lines, each of the plurality of pixel circuit comprising;

    a display element which emits light at luminance corresponding to the data current;

    a transistor having a source electrode, a drain electrode, and a gate electrode, the transistor supplying the data current to the display element and;

    a first power supply line connected to the transistor;

    a second power supply line connected to the display element;

    a first capacitor which holds a voltage between the source electrode of the first transistor and the gate electrode of the first transistor;

    a first switch element which selects a connection between the drain electrode of the first transistor and the gate electrode of the first transistor;

    a second switch element which selects a connection between one of the plurality of the data lines and the display element;

    a third switch element which selects a connection between the first transistor and the display element; and

    a fourth switch element which selects a connection between the first capacitor and the display element, wherein the display element functions as a second capacitor.

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