Liquid crystal display panel and driving circuit thereof

Abstract

The invention provides liquid crystal display panel and a driving circuit thereof. The driving circuit comprises a power management circuit, a clock control circuit and a level conversion circuit. Thepower management circuit provides a plurality of different gate drive voltages through a voltage divider circuit. The clock control circuit is configured to output a clock control signal corresponding to each row partition based on a distribution relationship of a plurality of row partitions of the pixel array. The level conversion circuit is connected with the clock control circuit, the power management circuit and a GOA circuit, and is used for controlling the clock control signal of the corresponding row partition to select the corresponding gate driving voltage, and the selected gate driving voltage is level converted and output to the GOA circuit.

Description

【Technical field】 [0001] The invention relates to the display field, in particular to a liquid crystal display panel and a driving circuit thereof. 【Background technique】 [0002] The basic concept of the GOA (Gate Driver on Array) circuit is to integrate the gate drive circuit of the TFT-LCD on the glass substrate to form a scanning drive for the liquid crystal panel. Compared with the traditional driving technology using COF (Chip on Film), GOA can not only greatly save manufacturing costs, but also save the bonding process of COF on the gate side, which is also extremely beneficial to increase production capacity. Therefore, GOA is a key technology for the development of LCD panels in the future. [0003] Please refer to figure 1 , is an existing liquid crystal display panel 9 comprising a COF (Chip on Film, chip-on-film) module 90 and a GOA circuit 91, the GOA circuit 91 is fabricated on the adjacent side of the COF module 90, and the COF module 90 It includes a clock...

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Problems solved by technology

Since the size of the current liquid crystal display panel is getting larger and larger, and it is required to be able to meet the requirements of a narrow frame, at this time, the RC product value caused by the wiring distribution of the GOA circuit 91 is relatively large, resulting in the wiring of the GOA circuit 91 Among them, the clock signal transmitted by the wiring relatively close to the COF module 90 (such as Figure 2A shown) and the clock signal (such as Figure 2B As shown), the waveforms are different, and even the peak voltages are inconsistent, which may affect the position of the liquid crystal display panel in the far-end area and the near-end area relative to the position of the COF module 90 Consistency of charging rate and in-plane uniformity, even the influence of the gate drive voltage VGH output by GOA circuit 91 on the capacitive coupling (Coupling) when charging each pixel row is not the same

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