Projectors are one of the most common new forms of displaying media at home, in the classroom and especially in office buildings. The majority of all classrooms and office conference rooms contain a projector and therefore they must contain a screen to display the material on.
Manually fixed screens may not always be the best solution especially in multi-use rooms and electronic drop down screens can be costly.
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The best choice allowing flexibility and cost efficiency in a pull down projection screen. These screens are mounted to a wall, ceiling or with some other method and have a small handle which allows the screen to be pulled down.
Once the screen is in the down position a spring & pin assembly inside the top of the screen ensures the screen remains down and open at the position in which it was placed. Once viewing is done a slight tug of the handle will signal the screen to automatically role up into the compact assembly, freeing the space of a projector screen until it is needed again.
The pull down projection screen typically comes in a wide array of sizes to accommodate both standard 4:3 aspect ratio and the now more common, 16:9 wide screen aspect ratio.
These screens are typically sold in the following configurations:
AV Format: (No Borders): This is most typically used for classroom applications or with classic projectors.
NTSC Format (4x3): This is most typically used for those who do not plan on viewing a lot of wide screen content. It would be ideal for those who wish to use the screen to view classic films (VHS) and basic television channels.
Finally there is HDTV format: This is 16x9 also commonly called wide screen which allows for viewing of most newer movies and many television channels as well which now broadcast in this newer format.
The pull down projection screen also comes in several different finishes which include the classic Matt White which is a material that has a very plain appearance and white color. Decent video quality can be obtained with Matte White screens and it is the most cost effective.
The better alternatives include "Glass Beaded" and "High Contrast Grey" which are usually offered as material choices as well. The High Contrast Grey is the best choice for regular movie viewing and HD viewing with the wide screen configuration.
The better alternatives include "Glass Beaded" and "High Contrast Grey" which are usually offered as material choices as well. The High Contrast Grey is the best choice for regular movie viewing and HD viewing with the wide screen configuration.
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Nov 21, 2011 17:38:49
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