Patent ID: 8279139

Claim:
A display control apparatus comprising: a storage unit configured to store image data; a display control unit connected with at least one of a first display device and a second display device, and configured to read the image data stored in the storage unit based on a supplied clock signal, and output the image data to the first display device or the second display device, wherein the first display device displays image data having a ratio 4:3 based on the predetermined frequency of horizontal synchronization, and a second display device displays image data having a ratio 16:9 based on the predetermined frequency of horizontal synchronization; and a setting unit configured to reserve a memory space having a first horizontal pixel number, in the storage unit and set a frequency of a clock signal supplied to the display control unit to a first frequency when the first display device displays image data having the ratio 4:3, and to reserve a memory space of the second horizontal pixel number that is higher than the first horizontal pixel number and set a frequency of a clock signal supplied to the display control unit to a second frequency that is twice the first frequency when the second display device displays image data having the ratio 16:9, wherein said display control unit generates a read timing signal which synchronizes with the first frequency clock signal and becomes high level only in a display active period of the first display device when the image data is read and output to the first display device in accordance with the generated read timing signal, and generates a read timing signal which synchronizes with the second frequency clock signal and becomes high level only in a display active period of the second display device when the image data is read and output to the second display device in accordance with the generated read timing signal.