| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a device for preventing secret screen filming with a video camera in a movie theater. <P>SOLUTION: The amount of infrared light for secret filming prevention projected on a screen is changed according to a switching signal for the right eye and left eye pictures of a 3D movie that is based on a liquid crystal glass system. Thereby, the quality of a secretly filmed video is lowered, and the normal function of a secret filming device is interrupted to prevent secret filming. Since projection light used is invisible, it does not interfere with viewing of an audience. <P>COPYRIGHT: (C)2012,JPO&INPIT |
