DLC Projection Screen Which Can Be Used In A Brightly Lit Room
The Uchida Research Laboratory at Tohoku University demonstrated a high visibility projection screen using the theory of Diffused Light Control (DLC).
"Only light from the projector is diffused towards observers, and excess external light is reflected away from observers, or it is absorbed, so there is no influence from external light, and the screen can display images to observers with the black solid just the way it is emitted from the projector."
The screen is made of a reflective panel and diffusion film, with the projector below projecting onto the screen from a low angle. The reflective screen changes the direction of the light entering from below towards observers, and the diffusion film diffuses that light, in order to show images to the viewer.
"Conferences may be held in bright locations, so it will no longer be necessary to draw curtains closed to use a projector. Therefore it can be light enough for people to take notes, and they can also avoid making people drowsy, which seems to be unavoidable when you make the room dark. Also, since clear images can be projected in a brightly lit room, it can also be used for digital signage."
The screen demonstrated this time had seams due to the size of the diffusion panels, but if larger diffusion panels are made, it is also possible to make a large display with no seams.
"It's hard to see under direct sunlight. Sunlight is extremely strong, and this would need to be further tweaked, this will be the next issue we will approach."
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