Circuit and method for detection of GOA circuit malfunction, and display panel

Abstract

The present invention provides a circuit and a method for detection of GOA (Gate on Array) circuit malfunction, and a display panel. The circuit comprises: a plurality of first thin film transistors,a plurality of second thin film transistors and a plurality of unidirectional conduction modules allowing signals to perform unidirectional flowing; source electrodes and drain electrodes of the firstthin film transistors are respectively connected with an output end of a GOA circuit and gate electrodes of the second thin film transistors, and gate electrodes of the first thin film transistors are configured to access control signals configured to control on-off of the first thin film transistors; source electrodes of the second thin film transistors access clock signals or inverted clock signals, drain electrodes of the second thin film transistors are connected with a boxing detection device configured to perform signal detection; and drain electrodes of the first thin film transistorsare in one-to-one correspondence connection with gate electrodes of the second thin film transistors, and gate electrodes of the second thin film transistors are in one-to-one correspondence connection with the plurality of unidirectional conduction modules. The circuit and the method for detection of the GOA circuit malfunction, and the display panel can increase an anomaly detection rate of a GOA unit in the GOA circuit so as to reduce the repairing difficulty of the GOA circuit.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a circuit and method for detecting failure of a GOA circuit, and a display panel. Background technique [0002] GOA (Gate on Array, array substrate row drive) technology is to integrate the TFT (ThinFilm Transistor, Thin Film Field Effect Transistor, thin film transistor for short) as the gate switch circuit on the array substrate, thereby saving the original arrangement outside the array substrate. The gate drive integrated circuit part reduces the cost of the product from two aspects of material cost and process steps. GOA technology is a commonly used gate drive circuit technology in the field of TFT-LCD (Thin Film Transistor Liquid Crystal Display) technology. Its manufacturing process is simple and has good application prospects. The GOA circuit includes multiple cascaded GOA units. The functions of the GOA circuit mainly include: using the high-level signal output by the ...

AI Technical Summary

Problems solved by technology

However, the currently designed GOA failure detection scheme can only detect the output of the last-level GOA unit circuit, and the entire GOA circuit is formed by cascading M-level GOA unit circuits. If a certain level of GOA unit in the middle of the GOA circuit fails, It will also cause the output of the last level GOA unit to be abnormal, but we cannot judge which level of GOA unit circuit is invalid.

This will increase the difficulty of GOA circuit repair

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