Display Panel Protrusions for Light Shielding Adhesion

Protrusions are formed on the top surface of the top substrate before forming the light shielding layer. These protrusions create a rough surface topology that mechanically interlocks with the light shielding layer material, establishing strong adhesion bonds before the light shielding layer is fully deposited. This preliminary structural preparation ensures the light shielding layer remains firmly attached while maintaining its light-blocking function.

The invention transitions from a planar (2D) surface to a three-dimensional (3D) rough surface by adding protrusions. This dimensional change creates additional surface area and mechanical interlocking features that enhance adhesion. The protrusions extend vertically from the substrate surface, providing multiple bonding interfaces between the substrate and the light shielding layer, thereby preventing peeling and damage.

The top substrate surface is segmented into multiple regions through the formation of protrusions, creating distinct zones with different optical and adhesive properties. The protrusions divide the continuous surface into elevated and recessed areas, allowing the light shielding layer to be strategically positioned in specific segments to block peripheral light leakage while maintaining transparency in display regions for effective sealant curing.

Different regions of the top substrate are given different properties: the protrusion regions provide enhanced adhesion and light shielding, while the valleys between protrusions maintain transparency for curing. The light shielding layer is locally applied to specific areas where light leakage occurs, rather than covering the entire substrate, thus preserving curing efficiency in display regions while blocking leakage at periphery.