| 摘要 |
PROBLEM TO BE SOLVED: To execute a desired controlling action by an intuitive, convenient and user-friendly method by placing one or more fingers on a projection image.SOLUTION: The projection system 1 includes an image projector 10, an invisible light transmitter 11 and an invisible light sensor 12. The image projector is used for projecting a projection image 2 on a physical plane 3. The invisible light transmitter is used for generating an invisible light plane 110, which is parallel with the physical plane. The invisible light sensor communicates with the image projector. When a pointing object is placed on a touching point, an invisible light beam reflected from the pointing object is received by the invisible light sensor. According to the invisible light beam, a sensing signal indicative of a spatial coordinate position of the touching point is acquired and transmitted to the image projector. The image projector recognizes and calculates the spatial coordinate position of the touching point according to the sensing signal and performs a controlling action according to the spatial coordinate position. |
