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

A technology of a data driving circuit and a data driver, which is applied in the computer field, can solve the problems of reducing the service life of a liquid crystal display panel and increasing the power consumption of the liquid crystal display panel, and achieves the effects of improving the service life and reducing the power consumption.

Active Publication Date: 2017-05-10
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

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Effect test

Embodiment 1

[0071] Embodiment one: combine as image 3 The data driving circuit shown in the figure takes a normally black screen with 256-bit grayscale display and 14 gamma voltages as an example. The corresponding positive gamma voltage is G7 when the darkest screen of the normally black screen is 0 grayscale, and the negative polarity is G7. The gamma voltage is G8.

[0072] When the signal output terminal G[1] corresponding to the data driver 10 outputs a positive polarity data signal, the positive polarity signal selector 21 is in the working state, and the negative polarity signal selector 22 is in the closed state. When the positive polarity signal selector 21 When the positive voltage comparator 21a of the positive voltage comparator 21a determines that the positive polarity data signal output by the signal output terminal G[1] corresponding to the data driver 10 is the same as G7, the output terminal of the positive voltage comparator 21a outputs a low level signal, and the first...

Embodiment 2

[0074] Embodiment two: combine as image 3 The data driving circuit shown in the figure takes a normally white screen with 256-bit gray scale display and 14 gamma voltages as an example. The corresponding positive gamma voltage is G7 when the brightest screen of the normally white screen is 255 gray scale, and the negative polarity is G7. Sexual gamma voltage is G8.

[0075] When the signal output terminal G[1] corresponding to the data driver 10 outputs a positive polarity data signal, the positive polarity signal selector 21 is in the working state, and the negative polarity signal selector 22 is in the closed state. When the positive polarity signal selector 21 When the positive voltage comparator 21a of the positive voltage comparator 21a determines that the positive polarity data signal output by the signal output terminal G[1] corresponding to the data driver 10 is the same as G7, the output terminal of the positive voltage comparator 21a outputs a low level signal, and ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/36
CPCG09G3/3688G09G2320/0276G09G2330/021
Inventor 杨建光王洁琼何宗泽苏丹李硕冯志鹏张亮
Owner BOE TECH GRP CO LTD
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