Method, system, backlight source and display device for controlling local color gamut

Abstract

The invention discloses a method and a system for controlling a local color gamut, a backlight source and a display device. The method comprises the steps of receiving an image signal of a frame to be displayed; resolving the image signal to obtain a high-color-gamut region in the frame to be displayed, wherein a color-gamut value of the high-color-gamut region exceeds a preset range; controlling different regions of the backlight source according to the high-color-gamut region. In the method, the image signal to be displayed is analyzed and divided into a high-color-gamut region and a low-color-gamut region according to the color-gamut value, the high-color-gamut region is obtained according to an analysis result, control of different regions of the backlight source is achieved, and only a low-color-rendering LED lamp is required to be lightened on in several regions in which high-color-gamut images are not required to be displayed. Therefore, the power consumption of the backlight source can be reduced while the frame quality is ensured, and the energy-saving purpose is achieved. The invention further provides the system for controlling the local color gamut based on the method, the backlight source and the display device including the backlight source. Energy saving is achieved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method, a system, a backlight source and a display device for controlling a local color gamut. Background technique [0002] In the field of display, for various display devices, printers and printing devices, the commonly used color gamut represents the range of color types that a certain device can express. The colors that can be displayed in nature that are visible to the human eye constitute the largest color gamut space. If The larger the color gamut of a certain device, the richer the colors it can represent, that is, the stronger the ability to display natural colors. For liquid crystal display devices, the color gamut is determined by the color filter and the backlight. In the case of the same color filter, different color gamut requirements can be achieved by replacing the backlight, but the brightness of the backlight and the display The ability of the color gamut i...

AI Technical Summary

Problems solved by technology

For liquid crystal display devices, the color gamut is determined by the color filter and the backlight. In the case of the same color filter, different color gamut requirements can be achieved by replacing the backlight, but the brightness of the backlight and the display The ability of the color gamut is inversely proportional to the relationship, so when a certain brightness is satisfied, a high color gamut display requires relatively high backlight power consumption; similarly, when the backlight remains unchanged, different color gamuts require different In order to achieve a high color gamut, a high-filtering color filter is required, but a high-filtering color filter will cause the light transmittance of the LCD panel to decrease, and it must be increased in order to ensure normal display. The power consumption of the backlight, so when displaying a high color gamut picture, a relatively high power consumption of the backlight is required

[0003] High color gamut display is the common goal of current display devices, but usually not the entire picture needs high color gamut display. In most cases, many parts of a picture do not need high color gamut display, and the higher the color gamut The higher the value, the greater the energy consumption. If you do not need to display areas with a high color gamut or display them with high color rendering LEDs, it will cause a waste of energy.

In the prior art, the backlight light source composed of blue LED, green LED, red LED and white LED guarantees the high color gamut of the picture by blue LED, green LED and red LED, while the white LED guarantees the high color gamut of the picture. Compared with the light source that only uses blue LED, green LED, and red LED, this solution can adjust and control the color gamut and brightness, and improve the picture quality to a certain extent, but it cannot improve the overall picture quality. Controlling the LED light according to the level of the local color gamut can not reduce the power consumption of the backlight

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