GOA circuit

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...

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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