A display driving circuit, its driving method, and a display device

Abstract

Embodiments of the present invention provide a display driving circuit, a driving method thereof, and a display device, which relate to the field of display technology, and can reduce power consumption of a Source IC while avoiding the use of a heat sink. The display driving circuit includes a timing controller, a grayscale controller, and a source driver; the timing controller is used to acquire the grayscale data of sub-pixels in a frame of display image row by row, and output it to the grayscale controller, or for Output timing signals to the source driver; the grayscale controller is used to receive the grayscale data of a row of sub-pixels, and control at least a part of the reference grayscale voltage output terminal to output the reference grayscale voltage according to the grayscale data; the source driver is used to output the reference grayscale voltage at the timing Under the control of the signal, a plurality of gray-scale voltages are generated according to the received reference gray-scale voltage, and the plurality of gray-scale voltages are respectively input as data voltages to a plurality of data lines connected to the source driver. The display driving circuit is used to drive the display device to display.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a display driving circuit, a driving method thereof, and a display device. Background technique [0002] TFT-LCD (Thin Film Transistor Liquid Crystal Display, Thin Film Transistor Liquid Crystal Display), as a flat panel display device, has become more and more popular due to its small size, low power consumption, no radiation and relatively low production cost. It is widely used in the field of high-performance display. [0003] The above-mentioned TFT-LCD includes gate lines and data lines which intersect horizontally and vertically. During the display process, the gate lines are scanned row by row to gate the sub-pixels in the TFT-LCD row by row; The sub-pixels are charged. At this time, the liquid crystal molecules corresponding to the position of the sub-pixel are deflected, so that the gray-scale value displayed by the sub-pixel matches the gray-scale value outp...

AI Technical Summary

Problems solved by technology

[0004] Usually, TFT-LCD is provided with a Source IC (source driver) for outputting data voltage to the above-mentioned data lines. With the continuous improvement of TFT-LCD resolution and refresh rate, there are higher requirements for the computing power of Source IC. The Source IC is in the limit working state, which leads to the increase of the power consumption of the Source IC and serious heat generation

[0005] In order to solve the above problems, in the prior art, a heat sink with an auxiliary heat dissipation function will be provided on the Source IC, but the requirements for the size, volume and heat dissipation performance of the heat sink are relatively high, which is not conducive to reducing production costs, and the heat sink is for The heat dissipation effect of the Source IC in the extreme working state is not ideal

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