Driving method and driving circuit of liquid crystal panel and liquid crystal display device

Abstract

The invention discloses a driving method and a driving circuit of a liquid crystal panel and a liquid crystal display device. The driving method of the liquid crystal panel comprises a scanning driving process and a data driving process, wherein an overlap region is formed in the middle of switching from driving of an upper row of scan line to driving of a lower row of scan line; and the data diving process comprises a step of outputting a data signal corresponding to the lower row of data line after the data signal corresponding to the upper row of scan line continues to the overlap region. According to the driving method, the wiring of the liquid crystal panel is reduced, the corresponding control signals are reduced, the design difficulty is reduced, and the specification of a required control chip is correspondingly reduced to fulfill the aim of reducing the cost.

Description

technical field [0001] The invention relates to the field of liquid crystal display, and more specifically, relates to a driving method of a liquid crystal panel, a driving circuit and a liquid crystal display device. Background technique [0002] The LCD panel includes criss-cross scanning lines and control lines. The data lines are controlled by the data driver chip. After the data chip receives the data start signal TP1 (latched pulse), it will output the data voltage to the data line of the panel at the falling edge; scan The lines are controlled by scanning driver chips arranged on both sides of the LCD panel. At present, there are 3 control signals required by the scan driver chip to control the opening and closing of each line of the liquid crystal display, namely the start pulse signal STV (start voltage pulse), which controls the beginning of the first line; the clock pulse signal CKV (clock voltage pulse), It is provided to the shift register of the scanning drive...

AI Technical Summary

Problems solved by technology

[0003] The control signals of these scanning driver chips will be transmitted from the printed circuit board PCBA to the glass of the LCD panel through the flexible circuit board of the data chip, and then transmitted to the scanning driver chip through the glass wiring. At present, the mainstream design of the LCD panel is narrow bezel. In terms of development, the cost of adding a signal is that an extra line needs to be run on the glass, which will occupy the space on the edge of the glass. In addition, the timing control chip T-CON (timing controller) also needs an additional control signal, and the cost will also increase.

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