Patent ID: 8605031

Claim:
A driving apparatus of a backlight module, the backlight module has a plurality of light-emitting regions, comprising: a grayscale mean calculating unit, for receiving an image signal and calculating a first grayscale mean of a current frame and a second grayscale mean of a previous frame; an error calculating unit, coupled to the grayscale mean calculating unit, for receiving the first grayscale mean and the second grayscale mean and calculating a first difference between the first grayscale mean and the second grayscale mean; a backlight duty calculating unit, for receiving the image signal and calculating a first duty of one of the light-emitting regions corresponding to the current frame and a second duty of the one of the light-emitting regions corresponding to the previous frame; and a backlight control signal generating unit, coupled to the error calculating unit and the backlight duty calculating unit, for receiving the first duty, the second duty, and the first difference, wherein when the first difference is smaller than or equal to a backlight flicker threshold, the backlight control signal generating unit generates a backlight control signal of the one of the light-emitting regions according to the second duty and a first regulation value, when the first difference is greater than the backlight flicker threshold, the backlight control signal generating unit generates the backlight control signal of the one of the light-emitting regions according to the second duty and a second regulation value, and the first regulation value is different from the second regulation value.