Patent ID: 8704819

Claim:
A display device that refreshes a screen on a display panel on the basis of video data included in an externally transmitted command, the device comprising: a reception circuit for receiving the command; a display timing control circuit having a function of determining whether or not the command includes updated video data every predetermined period; frame memory for storing the updated video data when the command is determined to include the updated video data; a driver circuit for generating an image signal on the basis of the updated video data and outputting the image signal to the display panel along with a control signal, whereby the screen is refreshed, and a power circuit for supplying necessary power to the driver circuit, wherein, the display timing control circuit includes: first refresh pausing means for pausing the refreshing of the screen in a second predetermined period immediately after a first predetermined period immediately preceding the time of determination that the command received during the first predetermined period includes no updated video data; and first refreshing means for, when the command received is determined to include the updated video data, causing a memory access circuit to read the updated video data stored in the frame memory and output the updated video data to the driver circuit during the second predetermined period, whereby the screen is refreshed; when pausing the refreshing of the screen, the display timing control circuit stops the memory access circuit and digital circuits included in the driver circuit from operating, and causes the power circuit and analog circuits included in the driver circuit to output less current than during the refreshing.