After selecting the design screen, you need to decide on its size and shape. Format Projection Screen Aspect Ratio – the ratio of height and width of the image. Best of all, when the aspect ratio matches the format the projected image. If you plan to use several formats (supported by the projector), you can buy a screen with automatic roll format or screen that can be deployed to desired height. The standard typology of formats, depending on the projected image: Audiovisual format – AV 1:1 Universal screens that support the format of the square to the film by change their height. Video format – NTSC 4:3 to project images from a computer or game console, as well as conventional television viewing.
The format of high definition television – DVD (HDTV) 16:9 is used to demonstrate a greater of movies recorded on DVD, as well as transmission of high definition television (HDTV). Projection Screen Size There are some general guidelines that can guide the choice of screen size. 1. The height of the projection the screen should be approximately equal to one sixth of the distance from the screen to the last row of seats (a figure) in this case, the width of the projection screen can be calculated by a simple formula, depending on the format of the screen: 4:3 width = 1.33 height x width = 16:9 H x 1.78 2. Optimal placement of the screen height is: – for professional use – at least 125 cm from the floor to the bottom screen – for home theater – a minimum of 60-90 cm 3. For a better perception of the image the minimum distance to the audience (B) should be approximately 1.5 times the screen height (Y). The optimal screen size and distance also depend on the subjective preferences of the person. Therefore, pre-experiment with the projection distance, if you plan to install a fixed projector.