Patent ID: 7224350

Claim:
An image display device comprising: image display means for displaying an image of an input image signal; detection means for detecting a horizontal synchronization frequency and a vertical synchronization frequency of said input image signal; storage means for storing predetermined adjustment parameters in cross-reference to respective pairs of frequencies, each pair of frequencies including a predetermined horizontal synchronization frequency and a predetermined vertical synchronization frequency; decision means for determining whether the horizontal synchronization frequency and vertical synchronization frequency detected by said detection means matches one of said pairs of frequencies; and control means for controlling display of said image by said display means, wherein when said decision means determines that the horizontal synchronization frequency and vertical synchronization frequency detected by said detection means matches one of said pairs of frequencies, said control means controls display of said image by said display means based on the predetermined adjustment parameter that is cross-referenced to said matching pair of frequencies, and wherein when said decision means determines that the horizontal synchronization frequency and vertical synchronization frequency detected by said detection means does not match one of said pairs of frequencies, said control means calculates timing data relative to a waveform of said input image signal using the horizontal synchronization frequency and vertical synchronization frequency detected by said detection means, calculates an adjustment parameter based on the calculated timing data, and controls said display of said image by said display means based on the calculated adjustment parameter.