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A driving circuit unit, a driving circuit and a display device

A driving circuit and potential technology, which is applied in the field of driving circuits, display devices, and driving circuit units. It can solve the problems of insufficient bootstrapping ability of bootstrap nodes, low-level maintenance node leakage, leakage, etc., and achieves complete pulse shape and short rise. Good fall time, stability and uniformity

Active Publication Date: 2020-06-16
PEKING UNIV SHENZHEN GRADUATE SCHOOL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The integrated gate drive unit in the prior art has the problem of insufficient bootstrapping capability or leakage of the bootstrap node when generating a variety of complex signals, especially when the threshold voltage is negative, the leakage problem of the low-level maintenance node is serious

Method used

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  • A driving circuit unit, a driving circuit and a display device
  • A driving circuit unit, a driving circuit and a display device
  • A driving circuit unit, a driving circuit and a display device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Please refer to Figure 6 , is a schematic diagram of the circuit structure of the driving circuit unit of an embodiment, the driving circuit unit includes an input module 21 , a driving pull-up module 22 , a bootstrap node pull-down module 23 , a low-level maintaining module 25 and an output pull-down module 24 . The drive circuit unit also includes:

[0071] The first signal input terminal is used to receive the first clock signal CLK1;

[0072] The second signal input end is used to receive the second clock signal CLK2;

[0073] The third signal input terminal is used to receive the third clock signal CLK3;

[0074] The fourth signal input terminal is used to receive the fourth clock signal CLK4;

[0075] The fifth signal input terminal is used to receive the first complex clock signal CLKW;

[0076] The input signal input terminal CIN is used to receive the previous stage cascading control signal;

[0077] The first potential input terminal is used for inputtin...

Embodiment 2

[0126] Such as Figure 18 As shown, it is a schematic structural diagram of a driving circuit in an embodiment, which includes several driving circuit units in Embodiment 1, and each driving circuit unit is connected in cascade. Specifically including the first clock line CLK1, the second clock line CLK2, the third clock line CLK3, the fourth clock line CLK4, the fifth clock line CLKW1, the sixth clock line CLKW2 and the first low potential line VSS, the second low potential line VSSL, a first high potential line VH, an input signal input line CIN, and a cascade signal output line COUT. The drive circuit further includes N+1 cascaded drive circuit units in Embodiment 1, where N is a positive integer. The first clock line CLK1 , the second clock line CLK2 , the third clock line CLK3 and the fourth clock line CLK4 transmit clock signals for the driving circuit unit. The input signal input terminal CIN of the driving circuit unit of the first stage is used for coupling the star...

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Abstract

The invention relates to a driving circuit unit, a driving circuit and a display device, which can be applied to an AMOLED display, a TFT-LCD, etc. The driving circuit unit in the present applicationcan meet the requirements of multi-type scanning signals of the AMOLED pixel circuits and the driving circuit unit can meet the requirements of multi-type scanning signals of the AMOLED pixel circuits, By adopting a separate input structure, a separate double bootstrap node is formed, which solves the charge coupling problem between different bootstrap nodes caused by clock feed-through effect, restrains the voltage drop of the bootstrap node caused by the leakage of the thin film transistor, and makes the pulse shape of the output scanning signal more complete and symmetrical, and shortens the rise and fall time. By introducing a feedback transistor, the low-level sustain node can still maintain a high level when the threshold voltage of the transistor is negative, and the scanning signalat the output terminal can be maintained at a corresponding low level. The driving method of the present application can improve the electrical performance of the AMOLED pixel circuit, so that the stability and uniformity of the AMOLED display are better.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a driving circuit unit, a driving circuit and a display device. Background technique [0002] Organic Light-Emitting Diode (OLED) display has been extensively studied in recent years due to its advantages of high brightness, high luminous efficiency, wide viewing angle and low power consumption, and has been rapidly applied to a new generation of display devices. The driving mode of the OLED display can be passive matrix driving (Passive Matrix OLED, PMOLED) and active matrix driving (Active Matrix OLED, AMOLED). The cost of passive matrix driving is low, but it cannot realize high-resolution display due to crosstalk, and the passive matrix driving current is large, and the service life of OLED is short. In contrast, the active matrix driving method sets a different number of transistors on each pixel as a current source, which avoids crosstalk, requires less driving current, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/3266G09G3/3225
CPCG09G3/3225G09G3/3266G09G2320/02
Inventor 张盛东黄杰廖聪维雷腾腾
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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