Digital driving method and system of OLED display device

A digital driving system of an OLED display device, wherein one frame of the OLED display device includes a driving period and a blanking period, comprising:

• a division, dividing the frame into N sub frames, wherein N is an integer larger than or equal to 2, one of the N sub frames is a full-brightness sub frame, the full-brightness sub frame includes a full-emission sub frame and the blanking period, pixels of the OLED display device keep emitting lights within the full-emission sub frame, and the blanking period follows the full-emission sub frame;
• and
• a brightness setting module, applying N time ratios respectively in determining driving periods for driving the pixels in the N sub frames, wherein values of the N time ratios are, respectively, ½N-1, ½N-2, . . . , 1, each of the N time ratios is applied in determining a driving period for a corresponding one of the N sub frames, and a time ratio applied in determining the driving period for the full-brightness sub frame is 1.