Patent ID: 7511726

Claim:
A method of determining a display mode from a plurality of display modes for a display device that displays an image, each display mode relates to an inputted signal from a signal source that includes an analog signal and an H/V synchronization signal, the method comprising: determining at least one display mode corresponding to the inputted H/V synchronization signal, the determined at least one display mode including a plurality of similar display modes, such that each of the similar display modes has a different sampling signal; converting the inputted analog signal to a digital signal according to a sampling signal corresponding to each of the at least one determined display mode; calculating a difference between adjacent sampling values of each of the digital signals; integrating an absolute value of the calculated difference between the adjacent sampling values; and selecting the display mode having the greatest integration value of the absolute value of the difference between the adjacent sampling values; and displaying the image using the selected display mode from the at least one determined display mode that most closely relates to the signal source.