CN205354619U

CN205354619U - Shift register

Info

Publication number: CN205354619U
Application number: CN201520922687.4U
Authority: CN
Inventors: 段君玮; 张立新; 孙洪志
Original assignee: Jilin Teachers Institute of Engineering and Technology
Current assignee: Jilin Teachers Institute of Engineering and Technology
Priority date: 2015-11-18
Filing date: 2015-11-18
Publication date: 2016-06-29
Anticipated expiration: 2025-11-18

Abstract

The utility model discloses a shift register, including the aversion units that a plurality of electricity is connected, every mobile unit is including promoting the module, is used for according to the voltage output of the first signal and drive node the first signal is to output nodes, promote drive module, the electricity is connected in promoting the module, is used for according to the voltage output second signal of the drive node of previous aversion unit extremely the drive node, drop -down module, electricity are connected in promoting the module, are used for according to the voltage output low quasi -phase voltage of the drive node of a back aversion unit extremely output nodes, drop -down drive module, electricity connect in promoting drive module, are used for being based on the first signal and the 3rd signal output low quasi -phase voltage extremely the drive node. The utility model discloses a shift register can reduce the production of leakage current, makes the stable signal of shift register output, reduces the phenomenon that appears the shake because of the output low level, guarantees display frame's quality.

Description

A kind of shift register

Technical field

This utility model belongs to technical field of liquid crystal display, particularly relates to a kind of shift register.

Background technology

The gate drivers of liquid crystal display utilizes shift register to produce scanning signal in proper order.Current shift register can pass through non-crystalline silicon, thin film transistor (TFT) and low temperature polycrystalline silicon, thin film transistor (TFT) are manufactured on the glass substrate of liquid crystal display.Shift register is generally of multistage circuit, so some thin film transistor (TFT) can turn on one section of long time.But, when voltage continues or applies frequently to thin film transistor (TFT) and one section of long time of low-temperature polysilicon film transistor, the running that thin film transistor (TFT) will be degenerated and cannot be suitable, reduce the reliability of shift register, make shift register unstable, so that pixel light emission is unstable, and owing to the impact of clock signal makes output low level the phenomenon of shake occur, cause that display quality declines.

Utility model content

This utility model is in order to solve above-mentioned problems of the prior art, it is provided that a kind of shift register that can export stabilization signal.

This utility model is adopted the technical scheme that by this problem of solution:

A kind of shift register, including the shift unit of multiple electrical connections, each mobile unit includes hoisting module, for voltage described first signal of output according to the first signal and driving node to output node；Promote and drive module, be electrically connected to hoisting module, be used for the voltage output secondary signal extremely described driving node of the driving node according to previous shift unit；Drop-down module, is electrically connected to hoisting module, and the voltage being used for the driving node according to a rear shift unit exports a low level voltage extremely described output node；Drop-down driving module, is electrically connected to lifting and drives module, is used for exporting described low level voltage extremely described driving node according to described first signal and the 3rd signal.

Promote and drive module to connect the first clock signal input terminal and low level signal end, drop-down driving module connects second clock signal input part and high level signal end, hoisting module connects high level signal end, and drop-down module connects the first clock signal input terminal, second clock signal input part, high level signal end and low level signal end.

This utility model has the advantage that and has the benefit effect that

Shift register of the present utility model, it is possible to decrease the generation of leakage current, makes the signal that shift register output is stable, reduces because the phenomenon of shake occurs in output low level, it is ensured that the quality of display picture.

Accompanying drawing explanation

Fig. 1 is the structured flowchart of shift register shift unit of the present utility model.

Detailed description of the invention

Referring to the drawings and specific embodiments, shift register of the present utility model is described in detail.Specific embodiments described below is only preferred forms of the present utility model, and it is not intended that to restriction of the present utility model.

Fig. 1 is the structural representation of shift register shift unit of the present utility model.As it is shown in figure 1, shift register of the present utility model, including the shift unit of multiple electrical connections, each mobile unit includes hoisting module, for voltage described first signal of output according to the first signal and driving node to output node；Promote and drive module, be electrically connected to hoisting module, be used for the voltage output secondary signal extremely described driving node of the driving node according to previous shift unit；Drop-down module, is electrically connected to hoisting module, and the voltage being used for the driving node according to a rear shift unit exports a low level voltage extremely described output node；Drop-down driving module, is electrically connected to lifting and drives module, is used for exporting described low level voltage extremely described driving node according to described first signal and the 3rd signal.

Promote and drive module to connect the first clock signal input terminal and low level signal end, for the signal that previous shift unit inputs being supplied under controlling drop-down module in the clock signal of the first clock signal input terminal CKA input, and control the current potential of driving node according to the signal of the first clock signal input terminal CKA input and the low level signal of low level signal end VL input.

Drop-down driving module connects second clock signal input part CKB and high level signal end VH, for, under the control of the high level signal inputted at the signal of second clock signal input part CKB input and high level signal end VH, controlling the current potential of driving node.

Hoisting module connects high level signal end VH, for pulling up the level of signal output node for high level under the control of driving node current potential.

Drop-down module connects the first clock signal input terminal CKA, second clock signal input part CKB, high level signal end VH and low level signal end VL, for the signal of the first clock signal input terminal CKA input, the signal of second clock signal input part CKB input, the high level of high level signal end VH input, low level signal end VL input low level signal control under the current potential of drop-down output node.

In this utility model, promote and drive module to match with hoisting module, drop-down driving module, drop-down module, so that the low level signal that the output node output of this shift unit is stable, thus improve display quality；The impact of its not subject clock signal in the course of the work of drop-down module, thus ensure that the low level signal that output node output is stable equally.

Claims

1. a shift register, including the shift unit of multiple electrical connections, it is characterised in that: each mobile unit includes hoisting module, for voltage described first signal of output according to the first signal and driving node to output node；Promote and drive module, be electrically connected to hoisting module, be used for the voltage output secondary signal extremely described driving node of the driving node according to previous shift unit；Drop-down module, is electrically connected to hoisting module, and the voltage being used for the driving node according to a rear shift unit exports a low level voltage extremely described output node；Drop-down driving module, is electrically connected to lifting and drives module, is used for exporting described low level voltage extremely described driving node according to described first signal and the 3rd signal；Promote and drive module to connect the first clock signal input terminal and low level signal end, drop-down driving module connects second clock signal input part and high level signal end, hoisting module connects high level signal end, and drop-down module connects the first clock signal input terminal, second clock signal input part, high level signal end and low level signal end.