Patent ID: 8760458

Claim:
A scan-type display device control circuit, suitable for receiving a plurality of successive frame data and driving a light-emitting diode (LED) display device accordingly, comprising: a ping-pong buffer, comprising a first storage area and a second storage area; a data storage controller, for receiving the frame data in sequence and storing the frame data in the first storage area or the second storage area alternately; a line scan controller, logically connected to the ping-pong buffer, for capturing a plurality of line data of the frame data from the first storage area or the second storage area alternately; a display buffer, logically connected to the line scan controller, for temporarily storing the line data; and a scrambled pulse width modulation (PWM) signal generating device, logically connected to the display buffer or the line scan controller, wherein the scrambled PWM signal generating device captures the line data and generates a scrambled PWM signal according to the line data; wherein for each frame, a displaying period is divided into a first number of sub-periods, each sub-period is divided into a second number of scan line changing periods, the frame data is divided into the second number of line data, and each line data is scrambled by the scrambled PWM signal generating device into the first number of sub-line data, such that each sub-line data corresponds to one scan line changing period; in each sub-period, the corresponding sub-line data of each of the second number of line data is sequentially transmitted for displaying an image of the frame, such that each frame is displayed the first number of times in the displaying period; and the line data is M bits, the scan line changing period is 2 N cycles plus a deadtime period, and N is smaller than M.