Research progress of OLED sticking image

Organic Light-Emitting Diode(OLED)display technology exhibits the advantages of wide color gamut, low energy consumption and flexibility through the self-luminescence of organic materials,and is one of the most promising display technologies. At present, OLED displays still have problems such as short lifetime,low brightness and poor reliability. These problems eventually lead to the occurrence of sticking image. This paper aims to analyze and summarize the research progress and related solutions of OLED sticking image. Firstly, the relationship between OLED sticking image problem and OLED material lifetime as well as thin film transistor(TFT) stability is explained, focusing on the structural difference between flexible and rigid OLED devices,and the principle of OLED sticking image is further generalized. Secondly, for different causes of sticking image, the methods to alleviate and compensate OLED display sticking image are discussed, including schemes to improve the lifetime of organic materials, threshold voltage stability of TFT, and external compensation circuits. Finally,the further solution to the OLED display sticking image is prospected.