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An inflatable movie screen is an inflatable framework with an attached projection screen. Inflatable screens are used for outdoor movies, film festivals, drive-in theaters, sports, social and other events requiring outdoor projection.
The screen is made from PVC coated fabric layers joined by high frequency welding or mechanical sewing. The frame is inflated with a high pressure blower. Larger frames may require a three phase blower. The blower typically continues to operate, ensuring the screen remains fully inflated.
In comparison to traditional and heavy steel constructions, inflatable screens can be set up only a few hours before a movie. This can be useful for environments where wind or other dangerous weather may be a factor. Inflatable screens can be deflated quickly in the case of high winds, adding significantly to their safety. Inflatable screens can be highly portable compared to other structures used to support screens like truss and scaffold. A 52'/16m wide screen usually fits on a single pallet. A truss or steel system takes up an entire truck. Inflatable screens reach sizes up to 6,000 square feet (560 m2). The projection surface stays flat regardless of environment due to recent improvements.
Inflatable movie screen is a part of outdoor cinema. An outdoor cinema (also called open air cinema) consists of a digital or analog movie projector, scaffolded construction or inflatable movie screen, and sound system.
Open air cinemas first began at around 1916 in Berlin, Germany. Viewers usually sit on camping chairs or blankets. Some Hollywood world premieres were screened in outdoor cinemas – sometimes with the stars in attendance. Most screenings are free with some raising money for charities.
As projector prices have decreased, guerrilla style outdoor cinemas have become more common. These are run on a very small budget by groups of amateurs. It is common for the events to be organised online, participants then meet in parks, empty parking lots or other public places. Guerrilla outdoor cinemas are very basic, often needing to be completely setup and dismantled in a single night. Sheets, portable screens or existing walls are used as a screen for the projected image. Power is obtained from generators or car batteries.
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