Liquid crystal display panel driving circuit and driving method

Abstract

The invention provides a liquid crystal display panel drive circuit and a liquid crystal display drive method. The liquid crystal display panel drive circuit comprises a timing sequence controller, a level switching unit and a control signal generating unit. The work mode of the liquid crystal display panel drive circuit comprises a reset mode, in the reset mode, the timing sequence controller outputs a reset signal to the control signal generating unit, the control signal generating unit receives the reset signal, generates a corresponding control signal and outputs the control signal to the level switching unit, the level switching unit is controlled by the control signal to output a constant-voltage high potential to a GOA circuit of a liquid crystal panel so that the liquid crystal display panel can be quickly discharged in the reset mode, and the situation that after the liquid crystal display panel drive circuit enters a drive mode again, the current on a clock signal wire is over high, and over-current protection is triggered is avoided.

Description

technical field [0001] The invention relates to the technical field of liquid crystal display, in particular to a driving circuit and a driving method of a liquid crystal display panel. Background technique [0002] With the development of display technology, liquid crystal display (Liquid Crystal Display, LCD) and other flat display devices are widely used in mobile phones, TVs, Various consumer electronic products such as personal digital assistants, digital cameras, notebook computers, and desktop computers have become the mainstream of display devices. [0003] In an active liquid crystal display device, each pixel is electrically connected to a thin film transistor (TFT), the gate (Gate) of the thin film transistor is connected to the horizontal scanning line, the source (Source) is connected to the vertical data line, and the drain ( Drain) is connected to the pixel electrode. Applying sufficient voltage on the horizontal scanning line will turn on all the TFTs elect...

AI Technical Summary

Problems solved by technology

Due to the many clock signal traces inside the GOA, short circuits are prone to occur due to the manufacturing process. In order to prevent the LCD panel from being burned out, a structure with an over-current protection (OCP) function will be provided for the clock signal traces. However, for Eliminate brightness unevenness (mura). In the prior art, the timing controller will stop outputting the initial clock signal in a short time to reset the clock signal. Since the time to stop outputting the initial clock signal is short, the liquid crystal The display panel cannot be fully discharged. At this time, the timing controller outputs the initial clock signal again, which will cause the current on the clock signal line to be too large and trigger the over-current protection. However, there is no short circuit between the clock signal lines at this time, that is, False triggering of overcurrent protection

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