Wall also has a diffuse scattering characteristics of the projection screen, but without color correction and no absorbance other treatment, when used as a display screen image will appear inaccurate color dispersion, shadow will appear false light, brightness and contrast enough phenomenon . Two common front projection screen projection screen material comparison: (1) diffuse projection screen materials diffuse scattering screen projector screen is evenly scatter incident light in all directions, at every angle can see the same image . Diffuse screen with ultra-wide viewing range and soft image, but pay attention to the external light, messy effects of light. In light of network engineering external electric projection screen, light clutter environment, external light digital light projection screen conference room, cluttered together light and image scattering, reflection, and thus causing poor image overlapping light image quality. Usually diffuse scattering screen without external light, can maximize its performance among the clutter of light when using special screenings. Users buy projector screen summarizes steps: Step 1 Select the screen types: electric screen, wall screen, frame screen, frame-style floor screen, pneumatic landing smart home screen projection screen special, sit-screen, desktop screen, swing screen, aluminum screen frame, fluoroscopy screen Step 2. Select the format of the screen: the screen has a variety of picture formats, such as 1: 1, 4: 3, 16: 9, etc., you may need to choose according to the purpose of use, special specifications can be customized request. Step 3 to determine the screen size. Three factors determine the ideal size of the screen: If you need to install the screen space to meet the above conditions, the use of the projector's brightness is about 1000Lm, you can select the 100 "screen surface gain β≥2.8 treasure as special electric bead curtain, increase brightness fusion splicing projection screen projector screen works _ _ Wuhan Donghu Lantern Co., Jiuhua video project by Wuhan Wuhan Jiuhua Video Engineering Co., Ltd. (www.jowa-tech.com) strong, credible, in Wuhan, Hubei control and adjust the equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improve Wuhan Jiuhua innovative ideas will lead into the brilliant video and you work for a better future!