Advantages of OLED:(1)light weight (2) easy operation with simple elements (3) good imagine quality, high color purity and dynamic image(4) low power consumption. The most important fault of OLED is the short life span, but life span increased by 100% if use dendrimer (CYD-MD1384/CYD-MK4514/CYD-MD2524/CYD-MK5654 etc.) in the production, driven voltage is 1V less than the compared samples and lighting efficiency increased by 46%. Weihai CY Dendrimer Technology Co. Ltd.-Professional Manufacturer for low cost dendritic polymers.