Things to consider when choosing a projection screen

If you plan to install a projector in a home theater, don't forget the projection screen. Even if the wall is white, try not to directly project it onto the wall; the surface of most walls is very uneven, and the characteristics of the reflected color are completely unknown. Choosing the right projection screen involves many aspects, the following are the most important: 1 Anti-light curtain-Anti-light curtain reflects light from the projector back to the viewing area, while reflecting light from other directions away from the viewing area. -For a room where the ambient light cannot be fully controlled, or where the walls, floors, and ceilings are white or light-colored, the image provided by the anti-light curtain is better than that of the non-anti-light curtain. -If a large group of people is having a sports party, for example, everyone is watching a game in a well-lit room, the anti-light curtain is very good. 2 Motorized retractable screen-In a motorized retractable screen, the screen is attached to a motorized roller that pulls the screen back into a housing mounted on the ceiling or wall. -Some home theater enthusiasts will install a flat-screen TV behind the electric retractable screen. In this way, you can watch TV at will, and when the screen is down, you can watch movies better. 3 Curved frame screens-Large commercial cinemas generally choose curved screens; this can correct optical distortion and reflect more light to the audience from the side, which improves the balance. -For a curved screen and a projector equipped with an anamorphic lens, a curved screen is necessary because it can correct an optical distortion called pincushioning. -Because of the increased cost of the curved frame, curved screens are usually more expensive. -The curved screen can only be installed in a fixed frame and cannot be retracted. 4 Size-The optimal size of the screen depends on your seating distance. An important criterion is visual acuity (eyesight). How far away from the screen can you not see a single pixel? If you sit further away, you may not be able to see all the details in the image. -There are many formulas to calculate the optimal seating distance and screen size based on vision; for this purpose, I recommend using the ITU (International Telecommunication Union) recommendation. The seating distance is 3 times the height of the HD screen, which is UHD / 1.5 times the height of the 4K screen, regardless of the aspect ratio of the screen. In other words, for HD images: (seating distance) u003d 3 × (screen height) or (screen height) u003d (seating distance) / 3- For example, if your seat distance is 10 feet (120 inches), the HD screen The height should be 40 inches, which means that the diagonal measurement value of the 16:9 screen is 80 inches, and for UHD/4K, the screen height is 80 inches, which means the diagonal measurement value of the 16:9 screen is 160 inch. 5Materials-Screen materials are usually classified using several parameters, including gain, viewing angle, color accuracy, baseline color (white or gray) and ambient light suppression. -Gain indicates how much light from the projector is reflected back to the viewing area. The gain value is usually between 0.8 and 3.0, but it may be larger. -Generally, the greater the gain, the brighter the image seen on the axis, but the narrower the viewing angle. -If the light output of the projector is low, a high gain screen is useful. -High-gain screens are prone to hot spotting, that is, one area of u200bu200bthe image is brighter than other areas. -For a home theater where the ambient light and room tone can be fully controlled, a white screen with a gain of 1.0 to 1.3 is ideal. -For projectors with low contrast, a gray screen can increase the perception of contrast. -Some companies specialize in manufacturing screen materials designed for ultra-short throw projectors.