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Source driving chip protection circuit, display panel driving circuit and display device

A source driver chip, protection circuit technology, applied in static indicators, instruments, etc., can solve problems such as product anomalies, achieve the effect of overcurrent protection and avoid burnout

Pending Publication Date: 2019-04-12
HKC CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The main purpose of the present invention is to provide a source driver chip protection circuit, aiming to solve the problem of product abnormality when the source driver chip generates a large current

Method used

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  • Source driving chip protection circuit, display panel driving circuit and display device
  • Source driving chip protection circuit, display panel driving circuit and display device
  • Source driving chip protection circuit, display panel driving circuit and display device

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] It should be noted that the descriptions involving "first", "second" and so on in the present invention are only for the purpose of description, and should not be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the meaning of...

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Abstract

The invention discloses a source driving chip protection circuit, a display panel driving circuit and a display device. The source driving chip protection circuit protects a switching circuit, a current follower and a voltage comparison circuit; and the switching circuit and the current follower are sequentially connected in series between a power management integrated circuit and a source drivingchip. When an adjacent output channel of the source driving chip or the ground is short-circuited and causes a large current generated at a power input terminal of the source driving chip, the current flowing through a second input terminal and a second output terminal of the current follower is correspondingly increased, the voltage of a sampling resistor is greater than a preset reference voltage, and the voltage comparison circuit outputs a switch control signal to control the switching circuit to turn off; therefore, the over-current protection of the source driving chip is realized, andthe source driving chip is prevented from being burnt.

Description

technical field [0001] The invention relates to the technical field of display panels, in particular to a source driver chip protection circuit, a display panel drive circuit and a display device. Background technique [0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor Liquid Crystal Display) is one of the main varieties of flat panel display, and has become an important display platform in modern IT and video products. The main driving principle of TFT-LCD is that the main board of the system connects the R / G / B compression signal, control signal and power supply to the connector on the PCB board through wires, and the data is processed by the TCON (Timing Controller, timing controller) IC on the PCB board. Finally, it is connected to the display area through S-COF (Source-Chip on Film, source-level film drive chip) and G-COF (Gate-Chip on Film, gate film drive chip), so that the LCD can obtain the required power and Signal. [0003] Among t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3648
Inventor 黄笑宇
Owner HKC CORP LTD
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