PROBLEM TO BE SOLVED: To provide a display drive control device which is most suitable for display drive including display with a small amount of change and display with a large amount of change and can realize saving of chip area and reduction of power consumption and cost. SOLUTION: In the display drive control device, memory capacity of an internal display memory (20) is set smaller than the amount of data of one display picture of a display panel (140) as the drive object, and the display data can be transferred with the system in which externally inputted display data is once stored in the display memory (20) and is then sent to a drive circuit (37) to output a drive signal and with the system in which the display data is sent directly to the drive circuit by way of no display memory (20) to output a drive signal. Moreover, both transfer methods can be executed on the time division basis. COPYRIGHT: (C)2007,JPO&INPIT