Shifting register unit and gate driving device and display device

A shift register and gate technology, applied in the field of gate drive devices, display devices, and shift register units, can solve the problems of aging of pull-down transistors, high duty cycle voltage, affecting product life, etc., so as to reduce the gate duty Empty ratio voltage, the effect of improving life

Active Publication Date: 2015-04-29
HEFEI BOE OPTOELECTRONICS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the gate of the pull-down transistor is in a high potential state for a long time, with a very high duty cycle voltage, and this method will cause the pull-down transistor to age rapidly, reduce the mobility, and the current will drop, which will cause problems in the overall circuit, thereby Affect product life

Method used

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  • Shifting register unit and gate driving device and display device
  • Shifting register unit and gate driving device and display device
  • Shifting register unit and gate driving device and display device

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Embodiment Construction

[0063] In the shift register unit, the gate driving device and the display device of the embodiment of the present invention, for the pull-up node PU and the pull-down of the output node, two sets of pull-down TFTs work alternately to realize the pull-up node and the pull-down of the output node, The turn-on time of each group of pull-down TFTs in the pull-down phase is reduced, so the life of the pull-down transistors in the pull-down module can be improved, thereby improving the life of the entire register unit.

[0064] It is preliminarily explained here that the source and drain of the TFT in the embodiment of the present invention can be interchanged.

[0065] An embodiment of the present invention provides a shift register unit, the shift register unit has a capacitor, one end of the capacitor is connected to an output node of the primary stage, and the other end of the capacitor is connected to a pull-up node, so The shift register unit also includes:

[0066] The drai...

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Abstract

Provided are a shift register unit, a gate electrode driving apparatus and a display apparatus, improving service life of a shift register. The shift register unit in the present invention comprises: a first thin film field effect transistor, wherein a drain electrode thereof is connected to a first signal end, a source electrode is connected to an output node of the local electrode and a gate electrode is connected to a first node; a second thin film field effect transistor, wherein a drain electrode thereof is connected to the first signal end, a source electrode is connected to a pull-up node and a gate electrode is connected to the first node; a third thin film field effect transistor, wherein a drain electrode thereof is connected to a second signal end, a source electrode is connected to an output node of the local electrode and a gate electrode is connected to a second node; a fourth thin film field effect transistor, wherein a drain electrode thereof is connected to the second signal end, a source electrode is connected to the pull-up node and a gate electrode is connected to the second node; and a node voltage control module, which is used for controlling the first node and the second node so that they are in a high potential state in turn when the shift register unit is in a pull-down stage. The present invention improves the service life of the shift register.

Description

technical field [0001] The invention relates to a shift register technology, in particular to a shift register unit, a gate drive device and a display device. Background technique [0002] The integrated gate shift register integrates the gate pulse output register on the panel, which saves IC and reduces the cost. There are many ways to realize the integrated gate shift register, which can contain different transistors and capacitors. The commonly used structures are 12T1C, 9T1C, 13T1C and so on. [0003] Generally speaking, a shift register is composed of multi-level shift register units, and each level of shift register unit only outputs a high potential signal in a very short time, and outputs a low potential signal at other times, usually VSS signal. [0004] As mentioned above, the shift register unit of each stage only outputs a high potential signal in a very short time, and outputs a low potential signal at other times, which usually accounts for more than 99% of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20G09G3/36G11C19/28
CPCG09G3/20G09G2310/0267G09G2310/0286G09G2320/043G11C19/28G09G3/3648G09G2300/0809
Inventor 曾勉李小和金在光
Owner HEFEI BOE OPTOELECTRONICS TECH
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