LED display consists of a list of the light-emitting diode array combination, led luminous characters, so the quality of LED directly affect the overall quality of the display. 1, brightness and viewing angle LED display brightness depending on the density of luminous intensity and LED. In recent years, new technology LED substrate, epitaxy, chip and package, etc. after another, especially indium tin oxide (ITO) current spreading layer technology and process stability and maturity, the LED luminous intensity has been greatly improved. At present, the world-class brand of small power LED in the horizontal viewing angle of 110 degrees vertical viewing angle is 50 degrees, the emission intensity of the green tube has reached 4000mcd, led, red tubes up 1500mcd, led what it meant, blue tube of 1000mcd. 20mm pixel pitch, the display brightness can reach 10000nit more. Display can work around the clock in any environment. Luminous arc tube angle perspective refers to the brightness of the light emitting tube observation direction down to the normal direction brightness LED display one-half, in the same plane normal to the direction of two observations an angle formed by the direction. Divided into horizontal and vertical viewing. Vertical viewing angle horizontal viewing angle SMD vertical viewing angle horizontal viewing angle elliptical oval patch of light-emitting tubes emitting tube arc tube arc tube indoor led display | Gao Jin photovoltaic (Online) | led by Jinan Optoelectronics Technology Co., Ltd. Gao Jin. Jinan Gao Jin Optoelectronics Technology Co., Ltd. (www.gjlled.cn) is an industry leader in Jinan, Shandong, liquid crystal devices, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Gao Jin photoelectric leadership with the staff warmly welcome all inquiries negotiations to create high gold Photoelectric better future.