For the outdoor LED display is generally used oval or SMD LED light tube, oval arc tube with a small angle, high brightness, and the vertical viewing angle SMD LED is much larger than oval tube, but its brightness is less than the oval LED, From the user's point of view it should be based on the LED display audience and the surrounding light environment to choose a different perspective of the arc tube. For indoor LED display brightness because of low demand, a wider general audience, so SMD LED is the best option. It should be noted Jinan led display manufacturers, are now part of the market maker arc tube to reduce costs, confuse the user, the brightness of the arc tube is made relatively high, but Angle made smaller than a conventional light emitting tube perspective, this will cause the front LED display brightness is very high, but relatively large angle side view clear image situation arises. The maximum brightness under certain environmental illumination led, LED display brightness for each color in the highest gray level, the highest brightness. In a nutshell is the use of software to set the brightness of the display using a light gun in the normal direction when measured as 255 white. For the outdoor LED display according to the environment used to maximum brightness have different requirements, because in case of strong ambient light led display manufacturers, LED display brightness requires higher, to let people see on the screen what is displayed. Under normal circumstances, the display look northward for maximum brightness requirements low, long reach 4000CD / m2 will be able to meet the requirements, and ride south of display brightness of the entire screen is required to achieve 7000CD / m2, east and west and south of the requirements are the same, because most of the time will have a direct exposure to sunlight will the LED display. Theoretically require more than 5500CD square meter brightness brightness is sufficient. Jinan led display manufacturers | led | Gao Jin photoelectric provided by Jinan Optoelectronics Technology Co., Ltd. Gao Jin. Jinan Gao Jin Optoelectronics Technology Co., Ltd. (www.gjlled.cn) strong, credible, in Jinan, Shandong liquid crystal device industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Gao Jin photoelectric and you hand into the brilliant, for a better future!