Drive circuit capable of achieving two-way transmission of signals and shifting register thereof

Abstract

The invention provides a drive circuit capable of achieving two-way transmission of signals and a shifting register thereof. The drive circuit comprises a first transistor, a second transistor and a third transistor, wherein the first end of the first transistor is electrically connected with the (n-2)th grid drive terminal, the control end of the first transistor is electrically connected with the (n-4)th control terminal, the first end of the second transistor is electrically connected with the second end of the first transistor to form a common node, the second end of the second transistor is electrically connected with the (n+2)th grid drive terminal, the control end of the second transistor is electrically connected with the (n+4)th control terminal, the first end of the third transistor receives a high frequency clock pulse signal, the second end of the third transistor is electrically connected with the nth grid drive terminal, and the control end of the third transistor is electrically coupled to the second end of the first transistor. Accordingly, the second transistor has charging and discharging functions at the same time by means of two-stage potential voltage of the common node, and therefore two-way transmission of signals is achieved. Compared with the prior art, the drive circuit is simple in structure and smaller in layout area.

Description

technical field [0001] The present invention relates to a driving circuit, in particular to a driving circuit for a gate driver on array (GOA) panel capable of bidirectional signal transmission and a shift register including the driving 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...

AI Technical Summary

Problems solved by technology

Although the circuit does not require additional signals to achieve the purpose of bidirectional transmission, the circuit structure is relatively complex, and the extra layout area for the circuit to have bidirectional transmission function is too large, which will obviously not be conducive to the narrow frame design

In addition, the gate drive signal output by this circuit cannot be smoothly charged to the expected potential in a short time, so the signal cannot be transmitted to the last stage of the shift register without distortion at all.

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