XY projection screen is a world famous brand. The company operating a private cinema screens, a large cinema screen, large-scale project screen, electric projector lift racks and other world-quality products. The company's main product projection screen, projector screen is mainly used in home theater, office culture, education and other places, customers are welcome to come to counseling. 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 projection screen, and some super enthusiasts in pursuit of the ultimate effect of 100-inch projection screen, will build a 2.35: 1 screen or CRT lenses with Panamorph three shots to use. Gain is the industry term price projection screen is mainly used to measure the ability of the screen surface reflected light. In the case of a certain angle of the projected light projected constant flux, one party than the brightness of the projection screen brightness up under ideal conditions, called the projection screen brightness coefficient quoted in that direction, to which the maximum gain is called projection screen . Gain is used to measure the relative values ??of the luminance of the front screen and the optical properties of different screen material. Typically, we will gain a uniform rough surface is defined as 1.0 white, bright reflective screen surface with which it will come to compare the screen gain value. Screen gain is usually capable of measuring the vertical center of the screen of the reflected light. Viewing angle of the screen and the screen has a different gain inverse relationship, ie, the higher the gain, viewing angle will be smaller, so the projection screen appropriately selected depending on the application, the screen does not gain the higher the better. 120-inch projection screen projection screen _ _ Yunfu cloud hung audiovisual equipment provided by the Guangzhou-Yun audio-visual equipment. Guangzhou-Yun audio-visual equipment, Ltd. (www.xy-screen.com) strong, credible, in Guangzhou movie projection equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead male cloud audio-visual equipment and you hand into the brilliant, for a better future!