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Display device

  • US 9,196,633 B2
  • Filed: 09/10/2009
  • Issued: 11/24/2015
  • Est. Priority Date: 09/19/2008
  • Status: Active Grant
First Claim
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1. A display device comprising:

  • a first wiring connected to a pixel portion, the first wiring including a first portion, a second portion and a third portion;

    a common wiring; and

    a protective circuit comprising a first thin film transistor and a second thin film transistor,wherein the first thin film transistor includes;

    a first gate electrode;

    a first gate insulating layer over the first gate electrode;

    a first oxide semiconductor layer over the first gate electrode with the first gate insulating layer interposed therebetween;

    a first conductive layer in contact with the first oxide semiconductor layer; and

    a second conductive layer in contact with the first oxide semiconductor layer,wherein the first gate electrode is directly connected to the first wiring,wherein the first conductive layer is electrically connected to the second portion through a first transparent conductive layer, andwherein the second conductive layer is directly connected to the common wiring, andwherein the second thin film transistor includes;

    a second gate electrode;

    a second gate insulating layer over the second gate electrode;

    a second oxide semiconductor layer over the second gate electrode with the second gate insulating layer interposed therebetween;

    a third conductive layer in contact with the second oxide semiconductor layer; and

    a fourth conductive layer in contact with the second oxide semiconductor layer,wherein the second gate electrode is electrically connected to the common wiring through a second transparent conductive layer,wherein the third conductive layer is directly connected to the first wiring,wherein the fourth conductive layer is directly connected to the common wiring,wherein the first portion overlaps with the common wiring,wherein the third portion is closer to the pixel portion than the first portion and the second portion,wherein a first distance between edges of the first portion is narrower than a second distance between edges of the second portion, andwherein a direction of the first distance is parallel to a direction of the second distance.

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