| 摘要 |
<p>A video to display and a background are displayed superimposed on a screen, exhibiting both good visibility and transparency. A plurality of control electrodes (27) are lined up along an optical layer (25) on said screen (21), which is scanned by video light from a projector (11). A synchronization control unit (31) applies voltages to the plurality of control electrodes (27), and over the course of a video-light scanning cycle (T), each segment (22) of the screen (21) is switched between a video state and a non-video state. In synchronization with the video-light scanning, the synchronization control unit (31) switches the optical states of the plurality of segments (22) over the course of the video-light scanning cycle (T) and sets the optical states of parts of the screen (21) onto which the video light is projected to video states maintained by voltages with amplitudes greater than or equal to 2.</p> |
