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 ways of installing curtain to meet the diverse needs of consumers projection screen manufacturers, 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 display output format, and watch DVD, BD / HD-DVD are also in 16: 9 or 2.35: 1 wide screen-based, in order to be able to get close to the cinema viewing experience, we recommend 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 projection screen video bar offer, base set up in Guangzhou City, Guangdong Province, production of product categories are screen frame, curved frame screen, electric screen, folding screen, easy screen, large-scale projects, such as electric and projector hanger; curtain material including acoustically transparent screen, 3D acoustically transparent screen projection screen quotes, metal curtain, soft-definition screen, 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. Engineering projection screen Quote | male cloud audiovisual equipment (certified) | Macau projection screen quotes provided by 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.