Projection screen and projection method
A technology of screens and horizontal bars, applied in projection devices, optics, instruments, etc., can solve problems such as complex screen assembly
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[0022] refer to figure 1 , in the system 10, the front projection light emitted from the projector 11 is reflected by the projection screen 12 to the audience 14 arranged in front of the screen. In a typical exhibition booth or conference room, the audience 14 is often arranged in a wide horizontal area in front of the booth or podium, either sitting or standing. Due to the wide viewing area, a large horizontal viewing angle is required. However, in the vertical plane, in order for the eyes of the viewer 14 to obtain maximum intensity of light, the reflected light should be focused in a very narrow viewing zone 16 (shown in parentheses in the figure). On the other hand, the influence of light emitted by peripheral light sources such as overhead lighting 18 is minimized. Peripheral light projected onto the screen reduces contrast, which can make images appear washed out. On many occasions, the overhead lighting 18 is the main source of ambient light. Of course, other surrou...
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