goa signal judging circuit and judging method, gate driving circuit and display device

Abstract

Embodiments of the present invention provide a GOA signal judging circuit and judging method, a gate driving circuit, and a display device, so as to avoid an abnormal GOA output caused when a GOA input signal is partially lost in the middle of a frame. The GOA signal judging circuit is connected to the input end of the GOA unit, at least two clock signal ends of the GOA unit and the control end of the reset unit of the PU node in the GOA unit; the GOA signal judging circuit is used to detect the input end of the GOA unit and the GOA unit Signals of at least two clock signal terminals of the GOA unit; when it is confirmed that the input terminal of the GOA unit and the signals of at least two clock signal terminals of the GOA unit are abnormal, output a control signal to the reset unit of the PU node to control the reset unit to output a reset to the PU node signal to turn off the output transistor of the GOA unit, and at least one pair of clock signal terminals among the at least two clock signal terminals have complementary signals input.

Description

technical field [0001] Embodiments of the present invention relate to the field of display technology, and in particular to a GOA signal judging circuit and judging method, a gate driving circuit and a display device. Background technique [0002] In recent years, the development of liquid crystal displays has shown a trend of high integration and low cost. One of the very important technologies is the mass production of GOA (full name in English: Gate Driver on Array, Chinese: row drive on array substrate). The gate switch circuit is integrated on the array substrate of the liquid crystal display panel by using GOA technology, so that the part of the gate drive integrated circuit can be saved, so as to reduce the product cost in terms of material cost and manufacturing process. The gate switch circuit integrated on the array substrate using the GOA technology is also called a GOA circuit or a shift register circuit. [0003] Wherein, the shift register circuit includes se...

AI Technical Summary

Problems solved by technology

However, generally, the STV (frame start signal) signal generated by TCON (Timer Control Register, timer) is only a pulse that appears at the beginning of a frame, and the Tot_RST signal is only a pulse that appears at the end of a frame. For GOA When the clock signal (CLK) is partially lost in the middle of a frame, the abnormal output of GOA cannot be avoided

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