Patent ID: 7271791

Claim:
An image display method, comprising: specifying reading addresses from a display memory in an order synchronous with vertical scanning and horizontal scanning of a display panel, the display memory having addresses corresponding to individual pixels in the display panel, the addresses storing grayscale data specifying a gray level of the pixel corresponding to each address; sequentially reading the grayscale data from the reading addresses and setting the pixels of the display panel to the gray level specified by the grayscale data; determining if a specific refresh occurred in the display memory during a reading and scanning period in which the reading addresses are specified; and skipping the reading of the grayscale data at least from an address subsequent to the address at which the specific refresh occurred; maintaining a pixel corresponding to the skipped address at the gray level specified by grayscale data read before the reading and scanning period, if it is determined that the specific refresh occurred; and while skipping the reading of the grayscale data, increasing a frequency of a clock signal for vertical scanning of the display panel to a much higher frequency than a frequency of the clock signal when reading grayscale data.