Method of controlling image display device, image display device, and image display system

An image display device configured to display a whole image having a first image and a second image arranged based on image information supplied from an image supply device in cooperation with another image display device, comprising:

• an acquisition section configured to obtain configuration information related to an arrangement of the first image to be displayed by the image display device and the second image to be displayed by the other image display device;
• a decision section configured to decide overall resolution as resolution for displaying the whole image based on the configuration information obtained by the acquisition section;
• a resolution storage section configured to store the overall resolution decided by the decision section;
• a notification section configured to notify the image supply device with the overall resolution stored in the resolution storage section;
• an input section to which the image information is input from the image supply device notified with the overall resolution;
• a display section configured to display the first image based on a part of the image information;
• and
• an output section configured to output the image information to the other image display device configured to display the second image based on another part of the image information.

An image display system comprising:

• a first image display device configured to display a first image based on a part of image information supplied from an image supply device;
• and
• a second image display device configured to display a second image based on another part of the image information, wherein
• a whole image having the first image and the second image arranged is displayed, and
• the first image display device includes
• an acquisition section configured to obtain configuration information related to the arrangement of the first image and the second image,
• a decision section configured to decide overall resolution as resolution for displaying the whole image based on the configuration information obtained by the acquisition section,
• a resolution storage section configured to store the overall resolution decided by the decision section, a notification section configured to notify the image supply device with the overall resolution stored in the resolution storage section,
• an input section to which the image information is input from the image supply device notified with the overall resolution,
• a display section configured to display the first image based on the image information input to the input section, and
• an output section configured to output the image information input to the input section to the second image display device.