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Internet of Vehicle is reshaping the ecosystem of automotive supply chain and bringing in more opportunities for new players. Automotive display is the point of interaction and information for all the data enabled by connectivity, playing a central role in both informing and providing the means of input and control to a growing new systems and applications moving into the car. This is helping boost market growth for car displays overall. The applications of the display function of the vehicle have been from the simple car navigation console and audio/video entertainment, more gradually increase the active safety of functional applications, so the reliability and durability of automotive displays is more important. The display driving components and the liquid crystal display module are connected with the flexible printed circuit board. At present, the research on the flexible printed circuit board and the vehicle display are mostly discussed for each function, but the studies on the stress caused by the combination of driver circuit and printed circuit board (FPC) design is less. With the application of the end product gradually evolved into a thinner and smaller structure, TFT-LCD overall border design also is narrowed, which affects the larger part of the drive body circuit (Source Driver IC) and soft printed circuit in the production process. The defects of display module may be caused by improper assembly of FPC at the junction of connection. The application of the onboard display takes into account the long-term operation of the vibration problem, because the long-term vibration will lead to FPC connection pin micro-damage deteriorated, making the product has the potential risk of failure. This study focused on the defect issues of FPC at the junction of the connection. Through the design analysis and experimental test results, double layer polyimide (PI) films plus copper paste structure design with UV glue fixed FPC process can pass film pressing and transport vibration quality test. Durability of bending times also has excellent performance. The overall product quality has been significantly improved. This FPC structure and process has been joined the product design specifications in 2016.
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