Outdoor unit board 1, using high-quality precision PCB board led display manufacturers, circuit board with A grade sheet, the minimum copper thickness 35-44um line led display Qingdao, the hole wall copper thickness 18-35nm led display, guarantee the use of heat process without interrupting short circuit phenomenon 2, a one-time injection of high-quality masks, ink uniform, smooth and high corrosion resistance. completely eliminate the large screen when the video side of the front does not light up. 3, Highlight of high quality large chip 3535 SMD light Wuhan led display, consistency, and to ensure that it does not highlight the big screen video. 4, independent of the resistance and with voltage protection circuit to ensure that the cell plate is not completely burnt overvoltage reversed. LED as a new light source, is increasingly being integrated into people's daily lives, it is inseparable from the development of the demand for lighting. Compared to traditional light sources (such as fluorescent and incandescent), LED at close to the theoretical conversion efficiency than conventional light source efficiency 5-20 times higher. Even at this stage of mass production light effects, its level is between 2-15 times, combined with the advantages of its directivity, this gap will be even greater. Due to changes in light principle, the life will be much higher than traditional light sources. Indoor led display | Gao Jin photovoltaic (certified) | led display provided 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.