OLED Sealing Structure for UV Blocking Without Out-Gas Defects

The patent extracts and removes the organic material from the light blocking layer, replacing it entirely with inorganic materials. This eliminates the source of out-gas generation while maintaining the UV light blocking function through the inorganic layers, directly resolving the contradiction between UV blocking ability and out-gas generation.

The patent changes the material composition parameter from organic to inorganic, fundamentally altering the chemical properties of the light blocking layer. This parameter change eliminates the photodegradation and out-gas issues associated with organic materials while preserving the optical blocking function through carefully selected inorganic materials with appropriate bandgap energies.

The patent employs a composite inorganic layer structure with multiple layers having different refractive indices. This composite structure achieves UV light blocking through the combined optical properties of the layers while the specific material composition and interface design maintain or enhance the coupling force between substrates, resolving the contradiction between UV blocking and substrate coupling.

The patent applies different inorganic materials with specific local properties (different refractive indices) at different positions within the sealing unit. This local differentiation of material properties enables the structure to simultaneously achieve UV light blocking through refractive index mismatches and maintain substrate coupling through appropriate material selection and interface design.

The patent segments the light blocking function into multiple discrete inorganic layers, each with a specific refractive index. This segmentation approach achieves superior UV blocking through the cumulative effect of multiple interfaces while organizing the complexity into a systematic, manufacturable structure with clear fabrication processes.

The patent uses composite inorganic layers with different refractive indices to achieve UV light blocking. The complexity is managed by selecting materials from a limited set of inorganic compounds and organizing them in a systematic multi-layer structure that can be fabricated using standard thin-film deposition techniques, balancing performance enhancement with manufacturing feasibility.