| 摘要 |
PURPOSE:To observe a projected real image without perceiving the existence of a projection screen, by projecting the image while giving oscillation, rotation, and shake to a stretched transmission or reflection projection screen in single or plural directions parallel to the face of the projection screen. CONSTITUTION:The latent period of a very short time when brightness is not felt exists during the period from a time t0, when the light strikes the eye, to a time t1, and the feeling of brightness is increased quickly between times t1 and t2 after this latent period, and the feeling is held between times t2 and t3 while being reduced gradually. This principle is used effectively for the projection screen; and for example, the projection screen which consists of a lenticular sheet and has a joint in the center is stretched by a frame, and an image is projected while giving oscillation to this frame by a multivibration circuit. Thus, the image is observed without perceiving the joint in the center and the texture of the projection screen. |
