Backlight brightness adjusting method and device, and liquid crystal display device

A backlight brightness adjusting device, applicable to a liquid crystal display device, the backlight brightness adjusting device comprising:

• a memory;
• and
• one or more processors, wherein the memory stores one or more computer readable program codes, and the one or more processors are configured to execute the one or more computer readable program codes to perform:
• obtaining grayscale characteristic values of respective primary colors in an image to be displayed, wherein the grayscale characteristic values of the respective primary colors characterize contributions of grayscales of the respective primary colors to a grayscale of the image to be displayed;
• determining a backlight value according to the grayscale characteristic values of the respective primary colors, and coefficients corresponding to the respective primary colors;
• and
• adjusting backlight brightness according to the backlight value.

A liquid crystal display device, comprising a backlight brightness adjusting device comprising:

• a memory;
• and
• one or more processors, wherein the memory stores one or more computer readable program codes, and the one or more processors are configured to execute the one or more computer readable program codes to perform:
• obtaining grayscale characteristic values of respective primary colors in an image to be displayed, wherein the grayscale characteristic values of the respective primary colors characterize contributions of grayscales of the respective primary colors to a grayscale of the image to be displayed;
• determining a backlight value according to the grayscale characteristic values of the respective primary colors, and coefficients corresponding to the respective primary colors;
• and
• adjusting backlight brightness according to the backlight value.