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A clock signal overcurrent protection method and an array substrate row driving circuit

A clock signal and driving circuit technology, applied in instruments, static indicators, etc., can solve problems such as false trigger protection, no trigger protection of clock signal channel current, and display panel exposure.

Active Publication Date: 2019-06-07
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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Problems solved by technology

[0005] However, in practice, it is difficult to set the above-mentioned current threshold accurately. If the current threshold is set too high, the current on the clock signal channel may be very large but the protection will not be triggered, which will expose the display panel to danger. If the specified current threshold is too small, the protection may be falsely triggered when the current on the clock signal channel is not large

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  • A clock signal overcurrent protection method and an array substrate row driving circuit
  • A clock signal overcurrent protection method and an array substrate row driving circuit
  • A clock signal overcurrent protection method and an array substrate row driving circuit

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[0044] In order to make the objectives, technical solutions and effects of the present application clearer and clearer, the present application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present application, and the word "embodiment" used in the specification of the present application is intended to be used as an example, example or illustration, and is not used to limit the present application.

[0045] see figure 1 , the present application provides an array substrate row driving (Gate Driver On Array, GOA) circuit 10 for driving a display panel, which includes a level shifter 100 for controlling a thin film transistor (Thin-Film Transistor, TFT) by a clock signal on and off. The level shifter 100 includes a timing generator 110 and an overcurrent protection unit 120 . The timing generator 110 is used to generate a cl...

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Abstract

An array substrate row driving circuit and a clock signal over-current protection method of a level shifter are provided. The level shifter comprises a time sequence generator and an overcurrent protection unit. The method comprises the following steps: generating a starting signal and a clock signal by using a time sequence generator; And performing over-current protection in a time period between the starting end of the starting signal and the starting end of the clock signal by using an over-current protection unit. By means of the method, overcurrent protection is more accurate, and the situation that protection is triggered when current on a channel of a clock signal is large but not triggered or protection is triggered by mistake when current on the channel of the clock signal is notlarge is avoided.

Description

technical field [0001] The present application relates to an overcurrent protection technology, in particular to a clock signal overcurrent protection method for a level shifter and an array substrate row driving circuit for driving a display panel. Background technique [0002] The Gate Driver On Array (GOA) technology of the array substrate is a technology that integrates a gate driving circuit on a thin film transistor (Thin-Film Transistor, TFT) array substrate. Compared with an external gate driver chip, the use of GOA circuit can simplify the manufacturing process, reduce the thickness of the frame of the display, realize a narrow frame, and meet the visual requirements of high screen ratio. [0003] The GOA circuit uses a level shifter (Level Shifter) to generate a clock signal to control the TFT on and off. Generally speaking, the level shifter has an Over Current Protection (OCP) function to prevent the clock signal traces from being short-circuited by particles on...

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Application Information

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IPC IPC(8): G09G3/20
Inventor 张先明
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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