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

CN108766380AActive Publication Date: 2018-11-06WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2018-11-06

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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.
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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...

Examples

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...