Gate drive circuit capable of enhancing circuit drive ability

Abstract

The invention provides a gate drive circuit capable of enhancing circuit drive ability. The gate drive circuit capable of enhancing the circuit drive ability comprises nine transistors from a first one to a ninth one, wherein a control end of the first transistor is connected with an n-1th level gate drive signal, a second end of the first transistor is electrically connected with first control voltage, a control end of the second transistor is connected with an n+1th level gate drive signal, a first end of the second transistor is connected with second control voltage, a control end of the third transistor is connected with a first clock pulse signal, a second end of the third transistor is connected with a first direct current source, a control end of the forth transistor is connected with a second clock pulse signal, and a first end of the forth transistor is coupled with a second direct current source. Compared with the prior art, the forth transistor is arranged on the gate drive circuit capable of enhancing the circuit drive ability so as to avoid voltage reduction caused by stray capacitance, and furthermore the second direct current source can restrain leakage currents in the transistors, and duration of high potential of nodes is prolonged. Accordingly, large capacitance in the gate drive circuit capable of enhancing the circuit drive ability can be omitted, and the size of a board arrangement space occupied by the gate drive circuit capable of enhancing the circuit drive ability is reduced.

Description

technical field [0001] The invention relates to a gate drive circuit, in particular to a gate drive circuit capable of enhancing the drive capability of the circuit. Background technique [0002] In a thin film transistor liquid crystal display (Thin Film Transistor Liquid Crystal Display, TFT-LCD), each pixel has a thin film transistor (Thin Film Transistor, TFT), the gate of the thin film transistor is electrically connected to the scanning line in the horizontal direction, The drain is electrically connected to the vertical data line, and the source is electrically connected to a pixel electrode. If a sufficient positive voltage is applied to a scanning line in the horizontal direction, all the TFTs on the scanning line will be turned on, and at this time, the pixel electrode corresponding to the scanning line will be connected to the data line in the vertical direction, thereby connecting the data line The video signal voltage is written into the pixels, and then the tr...

AI Technical Summary

Problems solved by technology

However, when the above-mentioned voltage stabilizing module generates a high-potential node voltage through the capacitive coupling effect, it will also be affected by parasitic capacitors, which makes the low-potential of the output signal of the current stage not stable enough.

To increase the stability of the circuit, it is necessary to use a large-sized coupling capacitor to maintain the high potential of the above nodes, but large capacitors will occupy a large layout space, making the gate drive circuit unfavorable to the design trend of narrow borders

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