Patent ID: 7920121

Claim:
A dynamic control method for controlling a backlight module of a liquid crystal display (LCD), wherein the backlight of the LCD is provided by a plurality of light sources of a backlight module and controlled by a backlight control unit, comprising the following steps: receiving a frame data which is transferred to the LCD and consists of a plurality of raw grayscale level; processing a statistical analysis for distribution of the plurality of raw grayscale level; and transferring a plurality of corrected grayscale level which results from the statistical analysis corresponding to the raw grayscale level to the backlight control unit and a data modification simultaneously, wherein a relationship between the corrected grayscale level and the raw grayscale level follows a formula: Corrected ⁢ ⁢ grayscale ⁢ ⁢ level = Raw ⁢ ⁢ grayscale ⁢ ⁢ level × Maximum ⁢ ⁢ of ⁢ ⁢ corrected ⁢ ⁢ grayscale ⁢ ⁢ level Maximum ⁢ ⁢ of ⁢ ⁢ raw ⁢ ⁢ grayscale ⁢ ⁢ level , and the backlight control unit uses the plurality of corrected grayscale level to modify brightness of the backlight module and the data modification uses the plurality of corrected grayscale level to compare with the plurality of raw grayscale level for accurate display performance.