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GOA CIRCUIT AND LIQUID CRYSTAL DISPLAY DEVICE

  • US 20190049768A1
  • Filed: 09/15/2017
  • Published: 02/14/2019
  • Est. Priority Date: 08/14/2017
  • Status: Active Grant
First Claim
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1. A GOA circuit, comprising:

  • a plurality of cascaded GOA units, wherein a N-th stage GOA unit controls charging of a N-th horizontal scanning line, the N-th stage GOA unit comprises a pull-high control unit, a pull-high unit, a pull-down unit, a pull-down sustain unit, and a boast capacitor;

    the pull-high unit, the pull-down sustain unit and the boast capacitor are respectively connected with a first node and a gate signal output terminal of the N-th stage GOA unit, and the pull-high control unit and the pull-down unit are respectively connected with the first node of the N-th stage GOA unit;

    the pull-down sustain unit comprises;

    a first thin film transistor, a gate electrode of first thin film transistor being inputted with a low frequency clock signal, a source electrode and a drain electrode of first thin film transistor being respectively connected with a second node of the N-th stage GOA unit and inputted with the low frequency clock signal;

    a second thin film transistor, a gate electrode of the second thin film transistor being connected with the first node of the N-th stage GOA unit, a source electrode and a drain electrode of the second thin film transistor being respectively connected with the second node of the N-th stage GOA unit and inputted with a constant-low-voltage signal;

    a third thin film transistor, a gate electrode of the third thin film transistor being connected with a stage-transfer signal output terminal of the N-th stage GOA unit, a source electrode and a drain electrode of the third thin film transistor being respectively connected with the second node of the N-th stage GOA unit and inputted with the constant-low-voltage signal;

    a fourth thin film transistor, a gate of the fourth thin film transistor being connected with the second node of the N-th stage GOA unit, a source electrode and a drain electrode of the fourth thin film transistor being respectively connected with the first node of the N-th stage GOA unit and inputted with the constant-low-voltage signal;

    a fifth thin film transistor, a gate electrode of the fifth thin film transistor being connected with the second node of the N-th stage GOA unit, a source electrode and a drain electrode of the fifth thin film transistor being respectively connected with the gate signal output terminal of the N-th stage GOA unit and inputted with the constant-low-voltage signal.

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