Cover Window Grooves for Display Boundary Visibility

The patent applies local quality by forming grooves at specific locations where material boundaries exist (e.g., between different display areas or between the cover window and display panel). These grooves are not uniformly distributed but are strategically positioned to address local reflectivity differences. The grooves modify the optical properties only at the boundary regions, allowing the rest of the display to maintain its original visual characteristics while eliminating the harmful boundary effects.

The grooves act as an intermediary structure between materials with different reflectivity. By introducing this intermediate feature, the patent creates a transition zone that mediates the optical discontinuity between adjacent materials. The grooves fill or bridge the gap between materials, providing a gradual transition for light reflection and reducing the abrupt boundary effect that would otherwise be visible.

The patent segments the bond interface by introducing grooves that divide the continuous boundary into discrete regions. Instead of a single continuous bond line between the cover window and display panel, the grooves create multiple segmented bonding zones. This segmentation distributes the stress that would otherwise concentrate at the material boundary, reducing peak stress values and preventing failure initiation at the interface.

The grooves are formed beforehand in the cover window or display panel before bonding, creating a stress-relief structure in advance. This pre-formed geometry acts as a cushioning feature that anticipates and mitigates stress concentration before it occurs during operation. The grooves provide a gradual transition in material thickness or composition, cushioning the abrupt change in mechanical properties between different materials.