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DRIVER CIRCUIT, DISPLAY DEVICE INCLUDING THE DRIVER CIRCUIT, AND ELECTRONIC DEVICE INCLUDING THE DISPLAY DEVICE

  • US 20110064186A1
  • Filed: 09/08/2010
  • Published: 03/17/2011
  • Est. Priority Date: 09/16/2009
  • Status: Active Grant
First Claim
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1. A driver circuit comprising plural stages of pulse output circuits, each of the pulse output circuits comprising:

  • a first circuit for outputting an output signal in accordance with a potential of a first node and a potential of a second node;

    a second circuit for supplying a signal corresponding to an output signal from a pulse output circuit in a preceding stage to the first node;

    a third circuit for intermittently supplying a signal having a high power supply potential to the second node;

    a first transistor for controlling the potential of the first node in accordance with the potential of the second node; and

    a second transistor for controlling the potential of the second node,wherein the second node is electrically connected to a gate of the first transistor,wherein the signal corresponding to the output signal from the pulse output circuit in the preceding stage is supplied to a gate of the second transistor,wherein a fourth circuit for raising potentials of source terminals of the first and second transistors from a low power supply potential is provided between the source terminals of the first and second transistors and a wiring for supplying the low power supply potential,wherein a switch for setting the potentials of the source terminals of the first and second transistors to a low power supply potential is provided, andwherein the switch is controlled by a judgment circuit for judging whether the first and second transistors are enhancement transistors or depletion transistors.

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