Driving control circuit and over-current protection method of GOA circuit thereof

A technology for driving control circuits and overcurrent protection, which is applied to instruments, static indicators, etc., can solve problems such as undetectable faults, achieve the effects of avoiding uneven currents and improving operational reliability

Inactive Publication Date: 2015-06-10
AU OPTRONICS CORP
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  • Driving control circuit and over-current protection method of GOA circuit thereof
  • Driving control circuit and over-current protection method of GOA circuit thereof
  • Driving control circuit and over-current protection method of GOA circuit thereof

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[0030] In order to make the technical content disclosed in this application more detailed and complete, reference may be made to the drawings and the following various specific embodiments of the present invention, and the same symbols in the drawings represent the same or similar components. However, those skilled in the art should understand that the examples provided below are not intended to limit the scope of the present invention. In addition, the drawings are only for schematic illustration and are not drawn according to their original scale.

[0031] figure 1 A schematic structural diagram of a GOA circuit with an overcurrent protection function in the prior art is shown. figure 2 show figure 1 A schematic diagram of the principle of overcurrent protection for the GOA circuit. refer to figure 1 and figure 2 , as mentioned above, the control board outputs at least one current signal, and these current signals enter the array substrate row driving circuit (GOA cir...

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Abstract

The invention provides a driving control circuit and an over-current protection method of a GOA circuit thereof. The method comprises the steps of isolating or closing the GOA circuit; receiving at least one current signal from a control panel; comparing the current signal with a preset short circuit current threshold value; selecting the operation mode of the GOA circuit according to the comparison result; if the current signal is less than the short circuit current threshold, opening the GOA circuit to enter a normal working mode; if the current signal is more than or equal to the short circuit current threshold, keeping the GOA circuit closed to enter an over-current protecting mode. Compared with the prior art, the method has the advantages that the GOA circuit can be delayed to open or close, so that the short circuit protection mechanism can independently determine whether each current signal of the control plate exceeds the short circuit current threshold, the mistaken touch protection action caused by different current due to different plane display mode/ three-dimensional display mode and different temperature can be avoided, and as a result, the operation reliability of the GOA circuit can be improved.

Description

technical field [0001] The invention relates to a liquid crystal display device, in particular to a drive control circuit of the liquid crystal display device and an overcurrent protection method for a GOA circuit thereof. Background technique [0002] The GOA (Gate driver On Array, array substrate row driver) circuit is to directly fabricate the gate driver circuit on the array substrate to replace the driver chip made by an external silicon chip. Since the GOA circuit can be directly fabricated around the panel, the manufacturing process is simplified, the product cost can be reduced, the integration degree of the liquid crystal panel can be improved, and the panel tends to be thinner. In addition, the WOA (Wire On Array) layout design is to route the wires directly on the array substrate to replace the flexible printed circuit (FPC) to connect the data signals on the scan line and the data line. This layout method can significantly reduce the panel weight and reduce cost...

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Application Information

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IPC IPC(8): G09G3/36
Inventor 曾伟祯
Owner AU OPTRONICS CORP
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