Display Module Shielding Layer for Camera Hole Deformation
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Solution Overview
Problem
Folding display screens face deformation issues due to uneven ink thickness around camera holes, leading to a high peroxide value (PV) that affects the photographing effect.
Innovation Solution
A display module design with a shielding layer including a first shielding part in contact with the transparent film layer, covering the function area, and a function hole that goes through the display panel, filter layer, adhesive layer, and shielding part, allowing for simultaneous removal of the deformed shielding part and transparent film layer during the cutting process, thereby reducing the PV value and improving the photographing effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a circle of ink is disposed around a camera hole to shield circuits, then the shielding effect is improved, but the deformation of the camera part increases due to uneven ink thickness
Solution Approach 1:
The shielding layer is divided into a first shielding part (in the function area around camera hole) and a second shielding part (in the border area). The first shielding part has optimized thickness and positioning to reduce deformation at the camera hole, while the second shielding part provides overall shielding. This segmentation allows differential treatment of different regions to balance shielding effectiveness with deformation control.
Solution Approach 2:
The first shielding part is specifically positioned with its edge at a controlled distance (0.3-1.0mm) from the camera hole edge, and its thickness is optimized (0.8-1.2mm) to provide localized shielding without causing excessive deformation. This local optimization addresses the specific problem at the camera hole region while maintaining overall shielding performance.
2Object-affected harmful factors
If the ink thickness is increased to improve shielding, then the shielding effect is improved, but the peroxide value increases leading to worse photographing effect
Solution Approach 1:
The first shielding part has a controlled thickness of 0.8-1.2mm, which is optimized to provide sufficient shielding effect while preventing excessive peroxide value accumulation. This local thickness control ensures that the shielding function is maintained without compromising the photographing quality at the camera hole location.
Solution Approach 2:
The first shielding part is positioned and sized in advance during the manufacturing process, with its edge distance and thickness predetermined. This preliminary configuration prevents excessive peroxide value formation before the bonding process completes, thereby preventing degradation of the photographing effect.
3Object-affected harmful factors
If the shielding layer covers the entire function area, then the shielding effect is improved, but the complexity of the structure increases
Solution Approach 1:
The shielding layer is segmented into two functional parts: the first shielding part (in the function area) and the second shielding part (in the border area). This segmentation provides comprehensive shielding coverage while maintaining a relatively simple overall structure that can be integrated into the existing display module architecture.
Data Source
AI summary
A display module and a manufacturing method thereof, and a display device. The display module includes a display area and a function area. The display module includes a display panel, a cover plate layer, a filter layer, a flexible composite layer, and a shielding layer. The flexible composite layer is located between the filter layer and the cover plate layer, and the flexible composite layer includes a first adhesive layer and a transparent film layer. The shielding layer includes a first shielding part located in the function area. A function hole located in the function area goes through the display panel, the filter layer, the first adhesive layer, the transparent film layer, and the first shielding.