LED luminous efficiency (that is, external quantum efficiency) is within the LED quantum efficiency and the escape rate decision. Today, LED internal quantum efficiency is as high as 90%, but due to the low escape rate, take the word screen production, and therefore improve the external quantum efficiency LED light effect become a bottleneck. The development of the industry in order to break the bottleneck, take the word screen manufacturers, many innovative solutions have been proposed, but the theory has been verified, most of which have entered the test phase, take the word screen, and some have been successful, and for the final industry has laid a solid foundation. Many causes of display pixels out of control, the most important reason is that "LED failure." LED main cause of failure can be divided into two aspects: First LED its poor quality; the second is to use improper methods. Through analysis we summarize the correspondence between the LED failure modes and between the two main reason. Take the word screen monochrome screen take the word _ _ 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!