GOA circuit

一种电路、电位的技术，应用在静态存储器、仪器、静态指示器等方向，能够解决漏电、第一节点电位误拉低、无法保证扫描信号输出正常等问题，达到保证输出、避免噪声的效果

Active Publication Date: 2018-11-06
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ideally, when the first node is at a high potential, the voltage at the second node is at a low potential. At this time, the thin film transistor is turned off, and the constant voltage low potential will not affect the potential of the first node. However, in actual work, When the first node is in the high potential stage, the drain-source voltage difference of the thin film transistor is the difference between the high potential of the first node and the constant voltage low potential, and the high potential of the first node is generally close to the constant high potential, so that At this time, the drain-source voltage difference of the thin film transistor is close to the difference between the constant voltage high potential and the constant voltage low potential. Once noise and coupling occur at the second node, the thin film transistor is prone to leakage, making the constant voltage low potential If the potential of the first node is lowered by mistake, the normal output of the scanning signal cannot be guaranteed, which will affect the quality of the display

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Embodiment Construction

[0032] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.

[0033] see Figure 1 to Figure 5 , the GOA circuit of the present invention includes: a multi-level GOA unit, and each level of GOA unit includes: a forward and reverse scanning control module 100, an output module 200, a second node control module 300, a first node control module 400 and an output control module Module 500.

[0034] see figure 1 , let N and M be both positive integers, N≥3, in the N-level GOA unit:

[0035] The forward and reverse scanning control module 100 is used for forward scanning control according to the scanning signal G(N-2) of the N-2th GOA unit and the scanning signal G(N+2) of the N+2th GOA unit. The signal U2D and the reverse scan control signal D2U control the potential of the first node Q(N).

[0036] The out...

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PUM

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Abstract

The invention provides a GOA circuit. A first node control module of the GOA circuit comprises a tenth film transistor, an eleventh film transistor and a twelfth film transistor which are all N-type film transistors, when the potential of a first node is the high potential, gate-to-source voltage difference of the twelfth film transistor is the threshold voltage thereof, drain-to-source voltage difference of the eleventh film transistor is further the threshold voltage of the twelfth film transistor, so a resistance value between a drain of the tenth film transistor and the first node is extremely large, influence of noise generated by a second node and the leakage current generated by the tenth film transistor on the potential of the first node can be avoided when coupling is performed, and output of a scanning signal is guaranteed to be normal.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a GOA circuit. Background technique [0002] A Liquid Crystal Display (LCD) has many advantages such as a thin body, power saving, and no radiation, and has been widely used. Such as: LCD TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or notebook computer screen, etc., occupy a dominant position in the field of flat panel display. [0003] Most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. The working principle of the liquid crystal display panel is to pour liquid crystal molecules between the thin film transistor array substrate (ThinFilm Transistor Array Substrate, TFT Array Substrate) and the color filter substrate (ColorFilter, CF), and apply a driving voltage on the two substrates to Control the rotation direction of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3677G09G2310/0283G09G2310/0286G11C19/28G09G3/3696G09G2310/08
Inventor 李亚锋邬金芳
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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