With the number of dots in the screen becoming larger,the period of writing data into OLED is certainly becoming longer.In order to improve the quality of the image,it is necessary to limit the time of writing message into OLED.On the basis of harmonizing the mode of writing and reading data,this paper puts forward a solution that drives OLED in a double mode,and analyzes it in detail.At last,we simulate our system in computer and compare the result with that of the real circuit.The result indicates that our new idea can shorten the writing period,and save more time for displaying process(31% longer then original design).It tends to show a good image.