How to use the easiest way to distinguish the quality of the merits of a LED display, LED wavelength control range of the wavelength determines the color is pure, the color is the same. Resolution solution is simple; users are generally not professional equipment, how to use the eye to distinguish? First: the entire screen play white, the screen should be pure white led, without any other noise. If you think a little reddish or bluish does not matter, you're wrong led, because the cast to prove this display materials and quality control processes have problems. Use a long time, it will be more serious. Second: the play of red, green and blue color, the color of the center wavelength is usually we say being green is red Zhenglan led industry, if a bit deeper or lighter color, proved to be partial wavelength. If a color is inconsistent, proved to be too poor wave, high-quality display in the center wavelength range, the difference between blue and green wave control 3nm, the red wave is less than 5nm. 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 led panel light, wide general audience, so SMD LED is the best option. It should be noted that the market is now part of the arc tube manufacturers to reduce costs, to confuse users, 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 LED display the front brightness is very high, but relatively large angle side view clear image situation arises. led | 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!