Infrared Alignment Mark for Edge-to-Edge Display Assembly
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Solution Overview
Problem
In edge-to-edge display assembly, the thin border of modern displays restricts the placement of traditional alignment marks, limiting precise dimension control to either the X or Y axis, and increasing tolerance differences as display size grows, while also needing to avoid obstructing the display's edge-to-edge appearance and internal components like cameras.
Innovation Solution
Incorporating invisible alignment marks on the inactive area of the display panel, detectable by infrared sensors but invisible to the naked eye, which can be used to control both X and Y axis alignment without obstructing the display's design or internal components, potentially eliminating the need for guiding plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional alignment marks are placed on the display assembly, then alignment precision can be achieved, but the display's edge-to-edge appearance is obstructed and internal components like cameras are blocked
Solution Approach 1:
The alignment marks are made invisible to the naked eye by using a wavelength range (e.g., infrared) that human eyes cannot detect, while remaining detectable by sensors. This resolves the contradiction by eliminating visual obstruction while preserving alignment functionality.
Solution Approach 2:
The patent replaces visible physical alignment marks with invisible electromagnetic wave-based marks detectable by sensors. This substitution eliminates the harmful visual obstruction while maintaining the alignment measurement function.
2Area of stationary object
If the display size increases, then more display area is provided, but tolerance differences increase and alignment control becomes more difficult
Solution Approach 1:
By using invisible alignment marks detectable by sensors, the system achieves more precise and consistent alignment measurement across larger display areas, overcoming the increased tolerance differences that occur with larger sizes.
Solution Approach 2:
The patent changes the detection parameter from visible light to infrared or other wavelengths, enabling more precise alignment measurement that maintains consistent tolerance control across varying display sizes.
3Manufacturing precision
If guiding plates are used for alignment, then alignment control is achieved, but device complexity increases
Solution Approach 1:
The patent extracts and eliminates the guiding plates by using invisible alignment marks that can be detected by sensors integrated into the display assembly, thereby reducing structural complexity while maintaining alignment control.
Solution Approach 2:
The mechanical guiding plates are replaced with an optical/electromagnetic detection system using invisible alignment marks and sensors, simplifying the overall device structure while achieving the same alignment control function.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution allows for precise alignment control in both axes without obstructing the display's appearance or internal components, achieving a more compact design and consistent tolerance across larger display sizes.
Implementation Method 1
A display panel has an active area that generates visual images and an inactive area disposed outside the active area. The inactive area has an alignment mark that is invisible to a naked eye.
Data Source
AI summary
An information handling system includes a display panel having an active area that generates visual images and an inactive area disposed outside the active area. The inactive area having an alignment mark that is invisible to a naked eye.