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Liquid crystal display device and electronic device

  • US 10,347,197 B2
  • Filed: 03/28/2016
  • Issued: 07/09/2019
  • Est. Priority Date: 12/28/2009
  • Status: Expired due to Fees
First Claim
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1. A display device comprising:

  • a display portion comprising;

    a first transistor;

    a transparent pixel electrode electrically connected to the first transistor;

    a second transistor; and

    a reflective pixel electrode electrically connected to the second transistor,wherein the transparent pixel electrode is configured to control a transmissive light intensity of a light-emitting element,wherein the reflective pixel electrode is configured to control a reflective light intensity over the reflective pixel electrode, andwherein a channel forming region of the second transistor comprises an oxide semiconductor layer having a crystal region which is c-axis-aligned perpendicularly to a surface of the oxide semiconductor layer, andan image processing circuit comprising;

    a memory circuit configured to store image signals; and

    a comparison circuit configured to compare the image signals stored in the memory circuit and to detect a difference among the image signals,wherein when the comparison circuit detects the difference in successive frame periods, the image processing circuit is configured to output a first signal associated with a moving image, andwherein when the comparison circuit does not detect the difference in successive frame periods, the image processing circuit is configured to output a third signal associated with a still image and stop an output of the third signal during a predetermined period.

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