OLED Packaging with Water-Blocking and Light-Absorbing Adhesive Layers

The packaging structure is divided into multiple functional layers: a water-blocking layer (first functional layer) and a light-absorbing adhesive layer (second functional layer). Each layer performs a specific function - the water-blocking layer prevents moisture ingress while the light-absorbing layer blocks ultraviolet light. This segmentation allows the complex packaging structure to achieve superior sealing effects by distributing functions across multiple specialized layers rather than relying on a single multi-functional sealant.

The invention employs composite materials with distinct functional properties. The water-blocking layer uses inorganic materials such as SiOx, SiON, or SiNx that provide excellent moisture and oxygen barrier properties. The light-absorbing adhesive layer combines organic polymeric adhesive materials with inorganic light-absorbing nanoparticles (TiO2, ZnO, talcum) to create a composite layer that simultaneously provides adhesion, UV absorption, and structural integrity. This composite material approach allows effective blocking of harmful factors while maintaining ease of manufacturing through established deposition and coating processes.

The invention converts the potentially harmful ultraviolet light into a beneficial function by incorporating light-absorbing materials (TiO2, ZnO, talcum) into the adhesive layer. These materials absorb UV radiation that would otherwise damage the driving switch and OLED components, transforming the harmful UV energy into heat that is dissipated safely. This approach adds the light-blocking function to the packaging structure without significantly increasing complexity, as the same layer that provides adhesion also provides UV protection.