Transmission screen, projection system, and transmission screen control method

摘要

A transmissive screen (30) for displaying an image projected from the projection device (11), a diffusion film (7) for diffusing the projection light (1) from the projection device (11), and a diffusion film (7) On the other hand, the illuminance in the space where the display panel (30a) having the colored film (6) which is arranged on the opposite side of the projection device (11) and the transmittance can be changed and the transmission screen (30) is arranged is the first. When it is equal to or higher than the threshold value, the transmittance of the colored film (6) is lowered, and when the illuminance in the space where the transmissive screen (30) is arranged is equal to or lower than the second threshold value which is smaller than the first threshold value, And 6) a control unit (12) that performs control to increase the transmittance.