Sensing Mesh and Light Shielding Layout for Low-Reflection Displays
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Solution Overview
Problem
Electronic devices face the challenge of external light reflection, which can make the internal conductive patterns visible from the outside, compromising their appearance and functionality, especially when powered off.
Innovation Solution
The electronic device incorporates a light shielding pattern with mesh lines that overlap the sensing patterns, where the thickness of the light shielding mesh lines is greater than the mesh lines of the sensing patterns, and a polarizing film to reduce reflectance and enhance black visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a light shielding pattern is added to prevent sensing pattern visibility, then appearance quality improves, but device structure becomes more complex
Solution Approach 1:
The light shielding pattern is merged with the existing sensing pattern structure. The light shielding mesh lines are disposed on top of the first and second sensing mesh lines, combining the light shielding function with the existing sensing grid structure, thereby improving appearance without adding completely separate components
Solution Approach 2:
The light shielding pattern is nested within the overall sensor structure. The light shielding mesh lines are positioned between the sensing patterns and the external environment, nested within the existing layered structure of the electronic device, allowing the light shielding function to be integrated without significantly increasing external dimensions
2Object-affected harmful factors
If light shielding mesh lines with greater thickness are used, then light reflection is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The light shielding mesh lines have different thickness characteristics at different locations. The minimum thickness of the light shielding mesh lines is specified to be greater than the thickness of the sensing mesh lines, creating local variation in thickness to optimize light reflection reduction while maintaining manufacturing feasibility
Solution Approach 2:
The thickness parameter of the light shielding mesh lines is optimized to be greater than that of the sensing mesh lines. This parameter change ensures sufficient light reflection reduction while maintaining compatibility with existing manufacturing processes and precision capabilities
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 effectively prevents the visibility of the sensing patterns from the outside, reducing external light reflection and enhancing the device's black visibility, thereby improving its appearance when powered off.
Implementation Method 1
The signal lines have a higher reflectance with respect to incident external light
Implementation Method 2
a polarizing film to reduce reflectance and enhance black visibility
Data Source
AI summary
An electronic device includes a base layer, a first sensing pattern disposed on the base layer and including a plurality of first mesh lines, a second sensing pattern disposed on the base layer, spaced apart from the first sensing pattern, and including a plurality of second mesh lines, and a light shielding pattern disposed on the plurality of first mesh lines and the plurality of second mesh lines, and including a plurality of light shielding mesh lines. The minimum thickness of the plurality of light shielding mesh lines is greater than the thickness of the first mesh lines and the thickness of the second mesh lines.