Metal projector screen classification: metal projection screen from the material is divided into: soft projection screen and projection screen hard; metal projection screen is divided into functionally reflective, transmissive types, reflective 3D HD projector for front projection screen special , transmission type for rear projection; being cast metal projection screen is divided into flat projection screen, curved screen. Gain smaller flat screen projection screen, larger viewing angle, ambient light must be weak; curved projection screen gain a larger perspective of the smaller frame projection screen customization, ambient light can be strong, but the incident reflected the projection screen at all direction range. How to determine the three important factors ideal projection screen size: 1. Determine the width of a screen ideal viewing distance should be equal to the diagonal of the screen. . b screen width can be calculated based on diagonal screen: 4: 3: W = diagonal × 0.80 16: 9: W × 0.872 2. diagonal determine the height of the screen 4: 3 format: height = width ÷ 4 × 3 16: 9 format: height = width ÷ 16 × 9 3. margin leave space around the screen with space to install rear projection screen customization margin, bottom margin of the screen is better ground about 0.7-1.25m . Example: You need to buy 100 "electric screen, select 4: 3 screen format to determine the screen size according to the formula: = diagonal screen width × 0.8 = 100" × 0.8 = 80 "× 25.4 = 2030mm video screen height = width ÷ 4 × 3 = 80 "÷ 4 × 3 = 60" ÷ 4 × 3 × 25.4 = 1530mm space required to install the screen space: height greater than 2.5m, width greater than 3m wall if you need to install the screen space to meet the above conditions, use the projector's brightness is about 1000Lm, you can select the 100 "screen surface gain β≥2.8 treasure as special bead electric screen, increase the brightness. Multimedia conference room projector screen, Wuhan video engineering (certified), projection screen provided by the Wuhan Engineering Co., Ltd. Jiuhua video. Jiuhua Video Engineering Co., Ltd., Wuhan (www.jowa-tech.com) is a leader in Wuhan, control and adjust the equipment, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs . Wuhan Jiuhua video leadership with the staff warmly welcome all inquiries negotiations to create a better video Wuhan Jiuhua future.