Image display device and method of changing first EDID with second EDID wherein the second EDID information is compatible with image display device

A display apparatus, comprising:

• a plurality of connecting portions to connect with a video/audio output device;
• a signal processor to process a video/audio signal input from the video/audio output device;
• a first storage unit to store extended display identification data (EDID) information provided to the video/audio output device when the video/audio output device is connected with the connecting portions;
• a second storage unit to store a plurality of EDID information respectively corresponding to the plurality of connecting portions;
• and
• a controller to store EDID information corresponding to a connecting portion connected with the video/audio output device from among the plurality of EDID information of the second storage unit in the first storage unit when the video/audio output device is connected to one of the connecting portions.

An image display system including a display apparatus, comprising:

• a plurality of video/audio output devices to selectively output video/audio signals to the display apparatus;
• a plurality of connection portions to connect a respective one of the plurality of video/audio output devices to the display apparatus;
• a first storage unit to store extended display identification data (EDID) information of one of the plurality of connecting portions, such that one of the respective video/audio output devices outputs the video/audio signals to the display apparatus;
• a second storage unit to store EDID information of all of the plurality of connecting portions;
• and
• a controller to change the EDID information stored in the first storage unit to another one of the EDID information stored in the second storage unit to selectively allow another one of the respective video/audio output devices to output the video/audio signals to the display apparatus.

A method of changing extended display identification data (EDID) information of a display apparatus connected to a plurality of video/audio output devices via a plurality of respective connection portions, the method comprising:

• storing EDID information of one of the plurality of connecting portions in a first storage unit, such that one of the respective video/audio output devices outputs the video/audio signals to the display apparatus;
• storing EDID information of all of the plurality of connecting portions in a second storage unit;
• changing the EDID information stored in the first storage unit to another one of the EDID information stored in the second storage unit based on a user's request to selectively allow another one of the respective video/audio output devices to output the video/audio signals to the display apparatus;
• and
• outputting video/audio signals to the display apparatus based on the changed EDID information.