Gamma voltage adjusting circuit, adjusting method and display device

Abstract

The invention discloses a gamma voltage adjustment circuit and adjustment method for improving automatic color calibration and a display device, and the gamma voltage adjustment circuit can select a corresponding output voltage according to an automatic color calibration function, so as to enable a color coordinate to meet the requirements of a user, and guarantee that the display brightness is not obviously changed as much as possible. The gamma voltage adjusting circuit comprises: a control module used for providing a control signal, wherein at least part of the power supply modules which are controlled by the control module, and the power supply modules are used for generating gamma voltage; a plurality of voltage division modules which are used for dividing the gamma voltage to generate gamma voltage of each order, wherein each power supply module comprises at least two input ends used for providing input voltage, so that the power supply module generates two or more than two different output voltages, and the power supply module selects the corresponding output voltage as gamma voltage according to the input voltage provided by the input ends and a control signal provided by the control module and provides the gamma voltage to the voltage division module.

Description

technical field [0001] The present invention relates to the technical field of liquid crystal display, and more specifically, to a gamma voltage adjustment circuit and a display device for improving automatic color calibration functions. Background technique [0002] The existing liquid crystal display (Liquid Crystal Display, LCD) not only has the characteristics of light and thin, small size, but also has the advantages of no radiation, low power consumption and relatively low manufacturing cost. dominate. [0003] With the continuous development of electronic technology, high-screen resolution display devices such as mobile phones, tablet computers, and high-definition televisions are more and more favored by users, and users have also put forward higher requirements for the quality of their display images. Therefore, most of the existing display devices need automatic color calibration to ensure the display effect of the display device. Although the automatic color cali...

AI Technical Summary

Problems solved by technology

Therefore, most of the existing display devices need automatic color calibration to ensure the display effect of the display device. Although the automatic color calibration function will adjust the color coordinates of the display device to make the display color more in line with customer requirements, it will affect the display of the display. brightness

In the prior art, the automatic color calibration function generally lowers the highest-order brightness of each sub-pixel when adjusting the color coordinates, thereby causing a decrease in the brightness of the entire display device, especially when lowering the highest-order brightness of the green sub-pixel. Display brightness has the most pronounced effect

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