Flexible Display Material Failure In The Mechanical And Temperature And Humidity Environment

The traditional displays now are facing many challenges with the development of display technology. It is an inevitable trend for flexible displays which can fit the different personalized applications. This paper focused on the failure analysis of flexible PNLCD (Polymer Network Liquid Crystal Display) and flexible STN-LCD (Super Twisted Nematic Liquid Crystal Display) based on the mechanic and environmental tests. A solid foundation can be established by research the failure mode during the tests.At first this paper introduced the principle of liquid crystal display, and showed the characteristics, performance and electro-optical properties of PNLCD and STN-LCD. Then this paper carried out the ideas and methods of failure analysis to plan scientific and effective test methods of the PNLCD and STN-LCD based on the practical needs. This study concentrated on the mechanic and environmental tests and failure analysis of flexible PNLCD and STN-LCD. For flexible PNLCD: cold test and cyclic damp heat test were adopted to find the failure mode and get the electro-optical parameters. Tension test and bending test were carried out to obtain the material parameters like elastic modulus. For flexible STN-LCD, there were four tests include dry heat test , steady state damp heat test, cold test and cyclic damp heat test to acquire parameters. Thermal analysis was performed to verify the tests.All test methods were made according interrelated criteria which guaranteed the effective of testing data and testing phenomenon. We totally understand the influence of environment test to flexible PNLCD and STN-LCD. The research will play an important role in improving performance to flexible PNLCD and STN-LCD.