Foldable Biometric Sensing Layout With Variable Line Density
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Solution Overview
Problem
Conventional foldable electronic devices have limited biometric sensor integration, restricting the sensing area and security applications, which hinders effective protection of personal information.
Innovation Solution
A foldable electronic device with a biometric sensing structure featuring a flexible substrate and integrated circuit unit, including conductive lines with varying distances in different regions, and a supporting film with openings, enhancing the sensing area and distribution density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a small amount of biometric sensors is integrated in the electronic device, then the device complexity is reduced, but the sensing area is limited and security application capability is restricted
Solution Approach 1:
The sensing structure is divided into multiple regions (first region and second region) with different conductive line densities. The first region has a first density of conductive lines while the second region has a second density, creating segmented functional zones that expand the overall sensing area without requiring a single uniform complex structure throughout the entire device
Solution Approach 2:
Different regions of the sensing structure are assigned different local qualities through varying conductive line densities. The first region uses a first density suitable for its specific sensing requirements, while the second region uses a second density optimized for its functions, allowing each local area to have the appropriate sensing capability without over-complicating the entire structure
2Reliability
If the sensing area is expanded to provide better security protection, then the biometric authentication capability is improved, but the device structure becomes more complex
Solution Approach 1:
The sensing structure is segmented into multiple regions with different conductive line densities, allowing the sensing area to be expanded across different zones of the display device without creating a uniformly complex structure throughout. This segmentation enables comprehensive security coverage while maintaining structural efficiency in each local region
Solution Approach 2:
The sensing structure serves multiple functions simultaneously: it provides biometric authentication, creates different sensing zones for various security levels, and integrates with the display device structure. This multi-functionality allows the expanded sensing area to achieve enhanced security protection without proportionally increasing overall device complexity
Data Source
AI summary
An electronic device has a first region and a second region and includes a supporting film having an opening disposed in the first region, a flexible substrate, an integrated circuit unit, and a sensing structure electrically connected to the integrated circuit unit. At least a portion of the flexible substrate and the integrated circuit unit respectively correspond to opposite sides of the supporting film. In a sectional view of the electronic device, the sensing structure includes a plurality of conductive lines, a distance between two adjacent ones of the plurality of conductive lines in the first region is different from a distance between other two adjacent ones of the plurality of conductive lines in the second region, and the two adjacent ones of the plurality of conductive lines are overlapped with the opening of the supporting film.