Display control device and method with dynamic backlight adjustment mechanism

The invention discloses a display control method and a display control device with a dynamic backlight adjustment mechanism. The display control method comprises the following steps: generating a backlight control signal of which the backlight period is 1/N times of the vertical synchronization period of a vertical synchronization signal; calculating the end time of the first vertical synchronization period after the vertical synchronization period is changed from the first period length to the second period length; selecting the end time of the first backlight period after the end time of thevertical synchronization period as the starting time of the transition period; calculating the time difference between the starting time of the transition period and the ending time of the vertical synchronization period; calculating a transition period length between the second period length and the time difference and segmenting the transition period length into a third period length; and generating a backlight control