Flexible Display Substrate Island Layout for Stress Relief

The substrate is divided into multiple isolated islands, each containing light-emitting elements and their corresponding driving circuits. These islands are separated by gaps that prevent stress propagation, allowing each island to independently handle mechanical stress while maintaining functional integration within each island unit.

The patent transitions from a planar integration approach to a three-dimensional island architecture. By stacking driving circuits vertically above light-emitting elements on each island and using multiple layers, the design achieves high integration density while the gaps between islands provide stress relief in the horizontal dimension.

The patent employs a thin-film substrate structure with multiple layered components including flexible circuit layers and encapsulation films. This allows the display to achieve thin and light characteristics while the distributed island architecture provides structural reinforcement without adding significant weight.

The display apparatus uses composite material structures with multiple functional layers including flexible substrates, encapsulation layers, and conductive materials. The combination of these materials provides both the required thinness and the necessary mechanical strength and durability.

The bridge structure is segmented into multiple directional components (first bridge portions and second bridge portions) that connect base portions along different axes. This segmentation allows for standardized manufacturing of each bridge type while achieving overall three-dimensional structural stability through their combination.

The bridge portions incorporate curved or angled geometries to connect base portions in multiple directions. These curved structures provide structural stability by distributing loads in three dimensions while maintaining manufacturability through standard fabrication techniques for angled and curved features.