Alignment Marks for Through Hole Registration in Display Modules
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The alignment accuracy between through holes of display modules and optical films is compromised due to shape differences, particularly when the display module is non-square, leading to misalignment during attachment operations.
Innovation Solution
The implementation of alignment marks on optical films and display modules, such as light guide plates, anti-glare layers, and touch sensing layers, allows for precise alignment of through holes through the use of auxiliary alignment marks and multiple layers of optical films, enhancing the alignment accuracy and stability during the manufacturing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the attachment operation uses the reference edge of the display module and optical film as alignment reference, then the attachment process is simple, but the alignment accuracy between through holes deteriorates due to shape differences
Solution Approach 1:
The patent introduces alignment marks as intermediary reference elements between the display module and optical film. These alignment marks serve as a mediating reference system that is independent of the shapes of the display module and optical film, enabling accurate alignment of through holes while maintaining a simple attachment process. The alignment marks are disposed on both components and used as the primary reference for the attachment operation.
2Adaptability or versatility
If the display module has a non-square shape, then the design flexibility and adaptability are improved, but the alignment accuracy between through holes of the display module and optical film deteriorates
Solution Approach 1:
The alignment marks act as an intermediary reference system that decouples the alignment process from the specific shapes of the display module and optical film. This allows the display module to have non-square shapes for design flexibility while the alignment marks provide a universal reference framework that ensures accurate through hole alignment regardless of the underlying shapes.
Solution Approach 2:
The patent explicitly accommodates asymmetric (non-square) shapes of the display module by using alignment marks that are independent of the shape symmetry. The alignment marks provide a consistent reference framework that works equally well for square, rectangular, or irregularly shaped display modules, thereby supporting design flexibility without compromising alignment precision.
3Adaptability or versatility
If multiple optical films are stacked with through holes, then the functional complexity and light control capability are improved, but the cumulative alignment error between through holes increases
Solution Approach 1:
The patent applies alignment marks on each optical film layer as intermediary reference elements. These alignment marks provide a consistent reference framework across multiple layers, enabling the stacking of multiple optical films with different functions while maintaining accurate alignment of through holes. The alignment marks prevent cumulative alignment errors by providing a universal reference system that works across all layers.
Data Source
AI summary
A display device includes a display module and an optical film. The display module has a through hole. At least one optical film is located on the display module and has an alignment through hole aligned with the through hole and an alignment mark surrounding the alignment through hole.