But if are viewing 4: 3 NTSC and PAL television-based, you can also consider 4: 3 screen. Classification is generally divided by installing chain hanging curtains, electric curtain hanging, pull the curtain and curtain frame other four. Many famous curtain curtain manufacturers offer the same material but with different installation methods to meet the diverse needs of consumers curtain 2015 projector screen, consumers can choose according to their own economic conditions. Classification commercially scaled proportionally divided projection screen 16: 9 and 4: 3 categories. Because home projector is basically a 16: 9 projection screen display output format engineering, installation, and watch DVD, BD / HD-DVD are also in 16: 9 or 2.35: 1 wide screen projector screen-based, in order to get close cinema viewing experience, we recommend using a home theater class 16: 9 screen, some super enthusiasts in pursuit of the ultimate effect will be to build a 2.35: 1 screen or CRT lenses with three shots to use. 2013, XY SCREEN screen projection screen set up manufacturing plant in China - Guangzhou-Yun audio-visual equipment projector screen instructions to set up base in Guangzhou, Guangdong Province, production of product categories are screen frame, curved screen frame, electric screen, folding screen, a simple screen, large-scale projects, such as electric and projector hanger; curtain material including acoustically transparent screen, 3D acoustically transparent screen, metal screen, high-definition screen soft, high-definition screen, such as fiberglass. A lot of friends, players study summed up a formula, use this formula can accurately calculate how much they need to gain the curtain, the formula is: white walls and gain a current / current picture area = desired screen gain / expectations The screen area. Projection screen where the good _ male cloud audiovisual equipment (certified) _ Dongguan projection screen provided by the Guangzhou-Yun audio-visual equipment. Guangzhou-Yun audio-visual equipment, Ltd. (www.xy-screen.com) is Guangzhou, film screenings leader in equipment over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Male leadership in cloud audiovisual equipment with the staff warmly welcome all inquiries negotiations to create audio-visual equipment cloud hung a better future.