Driving circuit and liquid crystal display device

Abstract

The invention discloses a driving circuit for driving a display panel, and a liquid crystal display device. The display panel comprises a plurality of pixel units, and the driving circuit comprises apower supply management module, a level conversion module and a reset module, wherein the power supply management module is used for providing a first power supply voltage according to an input voltage, and used for generating a complete reset signal according to the input voltage; the level conversion module is used for generating a state signal and a plurality of grid driving signals according to channel data of a second power supply voltage under control of the complete reset signal; the reset module is used for directly outputting the first power supply voltage into the second power supplyvoltage when the state signal is at a first state, and used for discharging the second power supply voltage into a reference ground voltage to reset the level conversion module when the state signalis at a second level state. The level conversion module can be reset and restarted, and output abnormity caused by the consequence that the level conversion module is locked by an XO function can be avoided. Therefore, normal display of the liquid crystal display device can be ensured when the input voltage is recovered.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal display, and more particularly relates to a driving circuit for driving a display panel and a liquid crystal display device. Background technique [0002] Liquid Crystal Display (LCD) is a display device that uses the phenomenon that the alignment direction of liquid crystal molecules changes under the action of an electric field to change the light transmittance of the light source. Due to the advantages of good display quality, small size and low power consumption, liquid crystal displays have been widely used in display terminals such as mobile phones and large-sized display panels such as flat-panel televisions. [0003] figure 1 A schematic structural view of a conventional liquid crystal display device is shown. [0004] Such as figure 1 As shown, the existing liquid crystal display device 100 includes a display panel 110 and a printed circuit board 140 providing various wo...

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Problems solved by technology

[0007] The liquid crystal display device 100 in the prior art has the following problems. When the power supply voltage drops rapidly and then recovers, the XON function of the level conversion module 150 is triggered due to the power supply voltage drop. When the power supply voltage recovers, the level conversion module 150 is locked. Dead state, resulting in abnormal voltage output, which makes the display screen abnormal

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