Driving method for liquid crystal panel, display driving circuit and liquid crystal display device

Abstract

The invention discloses a driving method for a liquid crystal panel, a display driving circuit and a liquid crystal display device. The driving method for the liquid crystal panel comprises the following steps: A, acquiring a coordinate position of a pixel to be displayed of a current frame of the liquid crystal panel and an ideal voltage value required by a gray level for corresponding displaying the pixel; and B, according to the coordinate position of the current pixel on the liquid crystal panel, determining an offset voltage for promoting the uniformity of the liquid crystal panel and then loading the offset voltage onto a corresponding data line. According to the invention, the difference of charging time in each region, which is generated due to charging caused by resistance-capacitance waveform delay variation (resistance-capacitance delay (RC delay)), of the liquid crystal panel is effectively improved; the display uniformity of the liquid crystal panel, particularly a large-scale liquid crystal panel, is promoted; and the taste performance of the liquid crystal panel is improved.

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 display driving circuit and a liquid crystal display device. Background technique [0002] At present, the resolution and size of liquid crystal displays are getting larger and larger. figure 1 As shown, the equivalent resistance and capacitive load on the equivalent transmission path corresponding to the panel with the thin film transistor (TFT) as the main driving method is getting larger and larger, as shown in figure 2 As shown, this will cause the data signal output by the data driver circuit (Data IC) and the gate control signal output by the gate driver circuit (gate IC) to vary, which is usually called the resistance-capacitance delay effect (RC delay) in the industry, such as image 3 As shown, when the resolution and size increase, the resistance-capacitance delay effect (RC delay) becomes larger and ...

AI Technical Summary

Problems solved by technology

[0002] At present, the resolution and size of liquid crystal displays are getting larger and larger. figure 1 As shown, the equivalent resistance and capacitive load on the equivalent transmission path corresponding to the panel with the thin film transistor (TFT) as the main driving method is getting larger and larger, as shown in figure 2 As shown, this will cause the data signal output by the data driver circuit (Data IC) and the gate control signal output by the gate driver circuit (gate IC) to vary, which is usually called the resistance-capacitance delay effect (RC delay) in the industry, such as image 3 As shown, when the resolution and size increase, the resistance-capacitance delay effect (RC delay) becomes larger and the variation intensifies. Take the bilateral gate drive circuit (gate IC) and the single-side data drive circuit (Data IC) drive as examples. The middle The variation of the gate control signal is the most serious, and the variation of the data signal at the lower end is the most serious. In this way, the uniformity of the center and the periphery is quite different, and the image quality seen is poor.

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