Data drive circuit and driving method thereof, source drive chip and display device

Abstract

The invention discloses a data drive circuit and a driving method thereof, a source drive chip and a display device; by virtue of signal selectors, it can judge whether a data signal, which is outputted from a corresponding signal output end of a data driver, is a signal of a darkest gray-scale picture under a normally black mode or a signal of a brightest gray-scale picture under a normally white mode, if so, a public voltage signal, which is outputted from a public voltage signal output end, is transmitted to a corresponding signal output end of the data drive circuit, so that it stops charging and discharging a liquid crystal under the normally black mode of a normally black screen or the normally white mode of a normally white screen, otherwise, a data signal, which is outputted from a corresponding signal output end of the data driver, is outputted to a corresponding signal output end of the data drive circuit. Therefore, by improving the data drive circuit, power consumption of a liquid crystal display panel under the normally black mode of the normally black screen or the normally white mode of the normally white screen can be effectively reduced, and meanwhile, under the precondition of avoiding influence to the normal display of other pictures, service life of the liquid crystal screen can be effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a data driving circuit, a driving method thereof, a source driving chip and a display device. Background technique [0002] The array substrate of an existing liquid crystal display panel includes a display area and a non-display area, wherein the non-display area may include components such as a gate drive circuit, a data drive circuit, and a timing controller, and the gate drive circuit is used for The display area provides gate scanning signals, the data driving circuit is used to provide data signals for the display area, and the timing controller is used to provide timing signals for the gate driving circuit and the data driving circuit, and control the signal output of the gate driving circuit and the data driving circuit. [0003] Taking the 256-bit grayscale display screen as an example, the signal output by the data drive circuit is as follows: figure 1 As shown, the ...

AI Technical Summary

Problems solved by technology

Therefore, for a normally black / normally white LCD panel, after the gamma voltage is adjusted, the corresponding black screen / white screen will also have two gamma voltages with opposite polarities, and these two gamma voltages are different from the common voltage. , which makes the data drive circuit also charge and discharge the liquid crystal in the display area when the liquid crystal display panel is in a black screen / white screen; therefore, the power consumption of the liquid crystal display panel is increased, and the service life of the liquid crystal display panel is reduced at the same time

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