Flexible Substrate Wearable for Thin Biometric Authentication
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Solution Overview
Problem
Current wearable devices are not sufficiently thin and lightweight, limiting their comfort and versatility for widespread adoption.
Innovation Solution
A wearable device design featuring a ring-shaped body with a flexible substrate mounting light emitting and receiving elements, along with a display unit, to enable finger vein authentication and biometric data acquisition, while minimizing thickness and weight through a compact, flexible circuit substrate configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wearable devices are designed with separate mounting structures for light emitting elements and display elements, then functional reliability is improved, but device thickness and weight increase
Solution Approach 1:
The patent combines the light emitting element and display element onto a single flexible substrate, integrating multiple optical components that were previously mounted separately. This merging reduces the number of mounting structures and layers needed, thereby decreasing device thickness while maintaining functional reliability through proper electrical and optical connections on the unified substrate.
Solution Approach 2:
The patent employs a flexible substrate to mount both the light emitting element and display element, utilizing thin-film technology to achieve compact integration. The flexible nature of the substrate allows for close positioning of components without requiring rigid mounting structures, thus reducing overall device thickness while ensuring stable component attachment and reliable operation.
2Stability of the object's composition
If conventional wearable devices use rigid mounting structures for multiple light emitting elements, then structural stability is improved, but device weight increases
Solution Approach 1:
The patent replaces rigid mounting structures with a flexible substrate that can accommodate multiple light emitting elements and display elements in a thin, lightweight configuration. The flexible substrate provides sufficient mechanical support and stability for the optical components while being significantly lighter than traditional rigid mounting structures, thus reducing device weight without compromising structural integrity.
Solution Approach 2:
The patent utilizes composite material construction for the flexible substrate, combining materials that provide both mechanical stability and lightweight properties. This composite approach allows the substrate to maintain structural stability necessary for reliable component operation while minimizing the overall device weight, achieving a balance between stability and weight reduction.
3Reliability
If light emitting elements and display elements are mounted on opposite sides of a substrate, then optical functionality is improved, but device thickness increases
Solution Approach 1:
The patent transitions from a three-dimensional stacked arrangement (elements on opposite sides of a substrate) to a two-dimensional planar integration on a flexible substrate. By arranging the light emitting element and display element side-by-side or in close proximity on the same plane of the flexible substrate, the patent eliminates the need for thick substrate layers between opposite sides, thereby reducing device thickness while maintaining optical functionality through proper light path design.
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
The solution results in a thinner and lighter wearable device that effectively performs user authentication and biometric data acquisition, enhancing user experience and comfort by reducing bulk and weight.
Implementation Method 1
a light emitting unit arranged on an inner periphery of the body and including at least one first light emitting element
Implementation Method 2
a light-receiving unit arranged on the inner periphery of the body and arranged opposite the light emitting unit
Data Source
AI summary
A wearable device according to an embodiment comprises a body configured to surround the outside of a subject, a light emitting unit arranged on an inner periphery of the body and including at least one first light emitting element, a light-receiving unit arranged on the inner periphery of the body and arranged opposite the light emitting unit, a display unit arranged on an outer periphery of the body and including at least one second light emitting element, and a first flexible substrate mounted with the at least one first light emitting element and the at least one second light emitting element, and the first flexible substrate has a first surface and a second surface opposite to the first surface, and the at least one first light emitting element and the at least one second light emitting element are mounted on the first surface of the first flexible substrate.