| 摘要 |
PROBLEM TO BE SOLVED: To provide an image display unit having a plurality of image signal input terminals, and configured to display an image only when an image signal is input to all image input terminals set to be used.SOLUTION: Image signal detection means obtains signal detection states from all image input terminals set by use-terminal setting means 201 (step S104). If an image signal is detected at all of the image input terminals having been set (step S105: Y), image projection means projects an image according image signals input to image input terminals selected by image input selection means (step S106). Meanwhile, if an image signal is not detected at any of the image input terminals having been set (step S105: N), the image projection means projects an image signal detection state (step S107). |
