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Clock signal overcurrent protection method and array substrate row driving circuit

A technology of array substrate rows and clock signals, applied to static indicators, instruments, etc., can solve the problems of false trigger protection, display panel exposure, clock signal channel current not triggering protection, etc., to avoid false trigger protection and overcurrent protection precise effect

Active Publication Date: 2022-04-05
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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  • Clock signal overcurrent protection method and array substrate row driving circuit
  • Clock signal overcurrent protection method and array substrate row driving circuit
  • Clock signal overcurrent protection method and array substrate row driving circuit

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[0044] In order to make the purpose, technical solution and effect of the present application more clear and definite, 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 here are only used to explain the present application, and the word "embodiment" used in the description of the present application is intended to be used as an example, illustration or illustration, and is not intended 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, used to control a thin-film transistor (Thin-Film Transistor, TFT) through a clock signal on and off. The level shifter 100 includes a timing generator 110 and an over-current protection unit 120 . The timing generator 110 is used for g...

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Abstract

The clock signal overcurrent protection method of the row driving circuit of the array substrate and the level shifter is provided. The level shifter includes a timing generator and an overcurrent protection unit. The method includes: using a timing generator to generate a start signal and a clock signal; and using an over-current protection unit to perform over-current protection in the time period between the start end of the start signal and the start end of the clock signal. Through this method, the overcurrent protection is more accurate, avoiding the situation that the current on the channel of the clock signal is large but the protection is not triggered, or the current on the channel of the clock signal is not large but the protection is accidentally triggered.

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 is a technology that integrates a gate driver circuit on a thin-film transistor (Thin-Film Transistor, TFT) array substrate. Compared with an external gate driver chip, the use of GOA circuits can simplify the manufacturing process, reduce the thickness of the frame of the display, realize narrow frames, and meet the visual requirements of high screen-to-body 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 (Over Current Protection, OCP) function to prevent the dust (Particle) on the display panel from causing a s...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G09G3/20
Inventor 张先明
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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