Display Panel Through Hole Light-Shielding Layer Design
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Solution Overview
Problem
Existing display devices face challenges in manufacturing efficiency and yield due to the complexity of integrating through holes and light-shielding layers in display panels, which can lead to issues like light leakage and static electricity concentration.
Innovation Solution
The implementation of a display device design featuring a first and second substrate with a through hole and a facing area, where the second substrate includes a light-shielding layer with a closed annular groove and a colored layer, and a manufacturing method that uses a punching machine to create the through hole, allowing for improved visualization of hole dimensions and reduced frame area enlargement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a through hole is integrated with a light-shielding layer in a display panel, then the display device can achieve functional integration and reduced component count, but manufacturing complexity increases and yield decreases due to alignment difficulties and light leakage issues
Solution Approach 1:
The patent divides the light-shielding layer into a first light-shielding layer and a second light-shielding layer positioned at different heights. The through hole is formed between these layers, allowing independent formation of each layer and the hole, thereby reducing alignment complexity and improving manufacturing yield while maintaining functional integration.
2Manufacturing precision
If the frame area is enlarged to accommodate through holes and light-shielding structures, then manufacturing precision can be improved, but the display area is reduced and overall device efficiency decreases
Solution Approach 1:
The patent utilizes the vertical dimension by positioning the first and second light-shielding layers at different heights relative to the through hole. This three-dimensional arrangement allows precise control of hole dimensions and light-shielding functionality without requiring excessive frame area, thereby maintaining display area efficiency while improving manufacturing precision.
3Illumination intensity
If a light-shielding layer is added to prevent light leakage, then optical performance improves, but the risk of static electricity concentration and manufacturing defects increases
Solution Approach 1:
The patent introduces a gap between the first light-shielding layer and the second light-shielding layer, with the through hole serving as an intermediary structure. This gap prevents direct contact and charge accumulation between the light-shielding layers, thereby reducing static electricity concentration while maintaining effective light shielding to prevent light leakage.
Data Source
AI summary
According to one embodiment, a display device includes a first substrate, a second substrate, a through hole, and a facing area. The facing area includes a display area and a frame area. The second substrate includes a light-shielding layer and a colored layer. The light-shielding layer includes a first groove formed in a closed annular shape along the through hole and penetrating from the first substrate toward the second substrate. The colored layer is located in the first groove and is provided in an entire area of the first groove in a planar view.