| 摘要 |
PROBLEM TO BE SOLVED: To provide a projection angle correction system which is inexpensive because of a simple constitution and automatically adjusts the distinction of an image. SOLUTION: The system is constituted of a screen device 3 on which the image is projected to detect infrared rays and a projector 10 which projects the image on the screen device, and the projector is provided with an infrared ray radiation means 7 which irradiates a lot of different positions of the screen device by infrared rays, a means which detects arrival time differences of infrared rays to the screen device, a revolving shaft 8 which rotates a lens and the infrared ray radiation means of the projector in accordance with arrival time differences of infrared rays, and a revolving shaft control means 5 which controls the infrared ray radiation means on the basis of the arrival time differences of infrared rays to the screen device to vertically adjust the radiation position of infrared rays radiated to the screen device, and thus the radiation position in the vertical direction of infrared rays to the screen is automatically adjusted.
|
