| 摘要 |
PROBLEM TO BE SOLVED: To prevent an erroneous operation of a body operation key during projection by switching between invalidity and validity of the body operation key by a simple method.SOLUTION: In a projector 1 that projects an image according to an input image signal, an input by a predetermined key of an input operation part 22 is switched to invalidity or validity by holding a shutter 4 at a predetermined position for a predetermined time period. The body operation key can be switched to invalidity or validity only by an opening or closing operation of the shutter 4, thereby avoiding a situation in which the projection is hampered by an erroneous operation of the body operation key during a presentation. |
