Shift register cell, gate driving circuit, data driving circuit and display

Abstract

The invention discloses a shift register cell, a gate driving circuit, a data driving circuit and a display, wherein the shift register cell comprises a first signal input end, a second signal input end, a first clock signal input end, a pull-down control signal input end, a signal output end (VOUT), an input module (21), a driving module (22), a driving control end pull-down delay module (23), a clock feed through inhibition module (25) and a low-level retention module (24). According to the invention, the signal output end can quickly discharge by a charging transistor in the driving module by prolonging discharging time for a driving control end in the shift register cell; and the electricity leakage of the transistor in the clock feed through inhibition module is inhibited, so that work speed and integration degree of the circuit are improved.

Description

technical field [0001] The present application relates to a display, in particular to a gate driving circuit, a data driving circuit and a shift register unit of the display. Background technique [0002] Active flat panel display has become the mainstream technology in the field of modern display. In an active flat panel display, the gate drive circuit and the data drive circuit are very important components. The traditional method is to connect the peripheral drive IC to the display panel by pressing and sealing. In recent years, integrated display driving circuits have gradually become a research hotspot in flat panel display technology. The so-called integrated display drive circuit mainly includes two parts: an integrated gate drive circuit and an integrated data drive circuit, which means that the gate drive circuit and data drive circuit are fabricated on the display panel together with pixel TFTs in the form of thin film transistors (TFTs). Compared with the tradit...

AI Technical Summary

Problems solved by technology

In some previously reported circuit schemes, the working speed of the shift register unit is slow, although it can meet the requirements of the gate drive circuit, it is not conducive to the realization of high-speed data drive circuit

There are two main reasons: on the one hand, the driving transistor is usually only used as a charging transistor, and the reduction of the falling delay time of the output signal can only be achieved by increasing the size of the discharging transistor, which cannot take into account the working speed and layout area of ​​the circuit; on the other hand Although the bootstrap technology is used to improve the driving ability of the driving transistor, due to the possible functional conflicts between the modules of the circuit, the shift register unit has a transistor leakage phenomenon during normal operation, which reduces the working speed of the circuit.

In addition, in order to suppress the clock feedthrough effect and ensure the stability of the low-level output signal, the existing circuit design usually has high design complexity and low yield, and there are also serious degradation of individual transistor device characteristics and short circuit working life. Shortcomings

[0004] figure 1 Shown is a circuit diagram of a disclosed shift register unit for a gate drive circuit that requires ten transistors Q 1 -Q 10 , and a capacitor C 1 , the working speed of the circuit is slow, the design is complicated, and some transistors are subjected to high voltage stress, which affects the working life of the circuit

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