Liquid crystal display device having improved electrostatic discharge resistance

  • US 8,830,409 B2
  • Filed: 12/26/2007
  • Issued: 09/09/2014
  • Est. Priority Date: 12/27/2006
  • Status: Active Grant
First Claim
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1. A liquid crystal display device comprising:

  • a first substrate having a side and including pixel electrodes, a peripheral circuit, at least one common electrode, and a dummy wiring, the peripheral circuit and the dummy wiring being provided outside a pixel area in which the pixel electrodes are arranged, the peripheral circuit being arranged along the side of the first substrate;

    a second substrate that includes a translucent conductive film provided at an opposite side of the second substrate to a side where the liquid crystal is present; and

    liquid crystal through which the second substrate is opposed to the first substrate, whereinthe peripheral circuit includes a common wiring supplying a common electric potential to the at least one common electrode, the common wiring being separate from the dummy wiring,the dummy wiring is located close to an outermost edge of the first substrate,the dummy wiring is made of a continuous metal layer surrounding the pixel area and peripheral circuit to ground the static electricity,the dummy wiring is located between the peripheral circuit and the outermost edge of the side at which the peripheral circuit is positioned and is not electrically connected to the peripheral circuit, the dummy wiring is connected to a ground potential outside the first substrate and the dummy wiring surrounds the peripheral circuit on at least three sides of the first substrate, andwherein the dummy wiring is provided to discharge electric potential rise on the first substrate that occurs due to coupling with electric potential rise of the translucent conductive film on the second substrate.

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