Display Panel Through-Hole Alignment for High-PPI Narrow Bezels
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Solution Overview
Problem
High-PPI display panels face challenges in incorporating alignment marks within the display region due to limited space, hindering further enlargement of the display region and narrow bezel design demands.
Innovation Solution
The display panel reuses existing through-holes as alignment connection holes, maintaining the high pixel density by arranging alignment marks within the display region without increasing the manufacturing process or reducing pixel units, and differentiates these holes through varying shapes on the light-exiting surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If alignment marks are added in the non-display region, then alignment precision is improved, but the display region area is reduced and bezel width increases
Solution Approach 1:
The patent merges the alignment mark function with existing through-holes in the array layer that are already required for electrical connections. By reusing these through-holes as alignment connection holes, the patent eliminates the need for separate alignment marks in the non-display region, thereby maintaining maximum display region area while achieving precise alignment through the recognition device
Solution Approach 2:
The through-holes in the array layer serve dual functions: they provide electrical connections between conductive layers and simultaneously serve as alignment connection holes for precise positioning during module assembly. This multi-functionality resolves the contradiction by eliminating dedicated alignment marks that would reduce display area
2Manufacturing precision
If alignment marks are added in the display region, then alignment precision is improved, but pixel density is reduced
Solution Approach 1:
The patent combines the alignment mark function with existing through-holes in the array layer structure. By utilizing these pre-existing structural features for alignment purposes, no additional elements need to be inserted into the display region, thereby maintaining high pixel density while achieving precise alignment
Solution Approach 2:
The through-holes in the array layer serve themselves by providing both electrical connection functionality and alignment mark functionality. This self-service approach eliminates the need for separate alignment marks that would consume display region space and reduce pixel density
3Manufacturing precision
If separate alignment marks are created, then alignment precision is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent merges the alignment mark creation process with the existing through-hole formation process in the array layer. Since these through-holes are already manufactured for electrical connections, reusing them as alignment connection holes eliminates additional manufacturing steps, thereby reducing process complexity while maintaining alignment precision
Solution Approach 2:
The through-holes serve multiple purposes including electrical connection and alignment reference. This multi-functionality reduces manufacturing process complexity by eliminating the need for separate alignment mark creation processes
Data Source
AI summary
Provided are a display panel, a detection device therefor, and a display device. In an embodiment, the display panel includes an array layer, along a thickness direction of the display panel, the array layer including first and second conductive layers, and at least an insulating layer being located between the first and second conductive layers; a light-emitting element located at a side of the array layer facing a light-exiting surface of the display panel; and a first through-hole. In an embodiment, the first and second conductive layers are connected to each other through the first through-hole, and at least one first through-hole is reused as an alignment connection hole; and/or, along the thickness direction of the display panel, orthographic projections of at least two first through-holes onto a plane of the light-exiting surface of the display panel have different shapes.