Patent ID: 7317461

Claim:
A display drive control device comprising: a display memory that stores display image data and reading out the display image data sequentially from the display memory to generate and output drive signals to a color display device; a drive circuit that generates and outputs signals to drive common signal lines to a first display region of the display device and a second display region of the display device; a setting means capable of setting gradation voltage information according to a characteristic of the first display region and gradation voltage information according to a characteristic of the second display region; and a gradation voltage generator that generates gradation voltages to be supplied to the drive circuit in accordance with set information in the setting means, wherein after a scan drive of selection lines for the first display region is performed, a scan drive of selection lines for the second display region is performed, wherein the gradation voltage generator generates gradation voltages according to first corresponding set information in the setting means when the first display region is in drive, and generates gradation voltages according to second corresponding set information in the setting means when the second display region is in drive, and wherein a specified interval is set when the drive of the first display region is transferred into the drive of the second display region, and during this interval, the generation of the gradation voltages according to the first set information is switched into the generation of the gradation voltages according to the second set information.