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Liquid crystal display device

  • US 9,348,189 B2
  • Filed: 03/05/2013
  • Issued: 05/24/2016
  • Est. Priority Date: 12/03/2008
  • Status: Active Grant
First Claim
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1. A liquid crystal display device comprising:

  • a transistor comprising;

    a gate electrode;

    a gate insulating layer over the gate electrode;

    an oxide semiconductor layer comprising a channel formation region over the gate insulating layer; and

    a source electrode and a drain electrode which are in contact with the oxide semiconductor layer;

    a first electrode layer;

    a second electrode layer having an opening; and

    a liquid crystal layer,wherein one of the first electrode layer and the second electrode layer is a pixel electrode layer which is electrically connected to the transistor, and the other of the first electrode layer and the second electrode layer is a common electrode layer, andwherein the oxide semiconductor layer comprises a depression portion between the source electrode and the drain electrode.

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