Patent ID: 9747844
Date: 2017-08-29
CPC Classifications: G09G

Claim:
1. A backlight brightness adjusting method for a liquid crystal display device, the method comprising: obtaining grayscale characteristic values of respective primary colors in an image to be displayed, the grayscale characteristic values of the respective primary colors characterizing contributions of grayscales of the respective primary colors to a grayscale of the image to be displayed; determining a first product of a red one of the grayscale characteristic values and a first coefficient corresponding to a red color, determining a second product of a green one of the grayscale characteristic values and a second coefficient corresponding to a green color, and determining a third product of a blue one of the grayscale characteristic values and a third coefficient corresponding to a blue color; summing the first product, the second product and the third product to obtain the backlight value; and adjusting a backlight brightness according to the backlight value.