| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a coordinate input system which enables one person to operate information processing equipment such as a personal computer and also act as a chairman and does not restrain the behavior. SOLUTION: This system includes a light emitting device 25 which emits a light beam 33 and a light receiving device 23 which receives the reflected light 28 of the light beam 33; and the light emitting device 25 is equipped with plural buttons and a changing means which changes the modulation state of the light beam corresponding to the operations of the respective buttons and the light receiving device 23 is equipped with a specifying means which specifies the reflection point coordinates of the reflected light 28 and a generating means which generates a signal corresponding to the modulation state of the light beam 33.</p> |
