Electrowetting Display Support Plate Patterned Hydrophilic Control

The patent merges the fluid control function with the existing support plate structure by integrating a patterned hydrophilic layer directly into the support plate. This eliminates the need for separate protruding hydrophilic parts and their associated manufacturing steps, while still achieving effective fluid direction control through the patterned hydrophilic regions that guide fluid movement along desired paths.

The patent applies local quality by creating patterned hydrophilic regions with specific spatial distribution on the support plate. These localized hydrophilic areas are strategically positioned to control fluid direction, while the rest of the support plate maintains its base properties. This allows precise fluid guidance without requiring complex three-dimensional protruding structures throughout the entire device.

The patent utilizes parameter changes by varying the hydrophilicity parameter of the support plate surface through patterned coating or treatment. Instead of complex electrode arrangements, the invention changes the surface energy parameters locally to create hydrophilic patterns that naturally guide fluid motion. This approach achieves fluid control through material property variation rather than complex structural arrangements.

The patent replaces mechanical or electrical control mechanisms (complex electrode structures) with a chemical/surface property-based control system. By using patterned hydrophilic regions, the fluid motion is controlled through wettability differences rather than electrical fields or mechanical structures, simplifying the overall device architecture while maintaining effective fluid guidance.