Transparent Release Agent Layer for Camera Region Alignment
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Solution Overview
Problem
The challenge in developing full-screen smartphones is aligning a front camera with the display screen while maintaining a high screen ratio, as particle pollution and stress-induced cracks during the bonding process complicate the alignment of layers, reducing the effective display area.
Innovation Solution
A display device with a transparent release agent layer in the camera region, integrated with a cover plate and display function structural layers, allows for precise alignment and increased effective display area by defining through holes in the protective adhesive and display function structural layers, facilitating precise alignment and reducing scrap generation during laser cutting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bonding is performed on optical adhesive layer, polarizer and backplate each with a hole, then alignment of holes is required, but particle pollution and stress-induced cracks occur during bonding, making alignment difficult and decreasing effective display area
Solution Approach 1:
The patent applies preliminary action by pre-defining the hole pattern on the cover plate before bonding the display function structural layer. The hole is formed on the cover plate in advance, and the display function structural layer is then bonded to align with this pre-defined hole, eliminating the need for complex post-bonding alignment and reducing alignment errors.
Solution Approach 2:
The patent uses the cover plate as an intermediary element that carries the pre-defined hole pattern. This intermediary structure serves as a reference for aligning the display function structural layer, facilitating precise hole alignment without requiring complex bonding processes on multiple layers with holes.
2Manufacturing precision
If tolerance increases during bonding process, then misalignment region of hole edges increases, but alignment precision of holes decreases
Solution Approach 1:
The hole is pre-defined on the cover plate before bonding, establishing a fixed reference that reduces the impact of bonding tolerance. This preliminary definition ensures that even with bonding variations, the hole alignment remains precise because the reference point is already established.
Solution Approach 2:
The patent merges the hole definition step into the cover plate manufacturing process rather than treating it as a separate alignment operation. By combining the hole creation with the cover plate fabrication, the system reduces the number of separate alignment operations needed and simplifies the overall bonding process.
Data Source
AI summary
The present invention discloses a display device and a manufacturing method thereof, the display device has a camera region and a displaying region surrounding the camera region, and has a cover plate; a transparent release agent layer disposed on the cover plate and is located in the camera region; a display function structural layer disposed on a surface of the cover plate with the transparent release agent layer; a protective adhesive layer disposed on the display function structural layer, and the protective adhesive layer having a first through hole corresponding to a region of the transparent release agent layer; the display function structural layer having a second through hole corresponding to the region of the transparent release agent layer.