Capacitive Fingerprint Sensor Arc Surface Design
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Solution Overview
Problem
Current capacitive fingerprint identification apparatuses are prone to misjudgment due to dust accumulation and lack aesthetic appeal, with flat surfaces that are easily damaged when devices are dropped, leading to suboptimal user experience and performance.
Innovation Solution
A capacitive fingerprint identification apparatus with an arc-shaped surface structure, utilizing high-temperature resistant UV glue and a dielectric constant greater than 3.4, providing a three-dimensional design that minimizes dust interference and acts as a buffer during drops, enhancing both appearance and functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plane structure is used for the capacitive fingerprint apparatus, then the manufacturing process is simple, but dust and substances are easily adsorbed causing misjudgment and the structure is easily damaged when dropped
Solution Approach 1:
The patent applies curvature by transforming the traditional plane fingerprint apparatus surface into an arc-shaped surface. This curved structure prevents dust and substances from being adsorbed, thereby eliminating misjudgment in fingerprint identification while maintaining structural simplicity and improving durability against drops.
2Shape
If a plane structure is used for the capacitive fingerprint apparatus, then the appearance is simple, but the aesthetic appeal and three-dimensional sense are insufficient
Solution Approach 1:
The patent implements curvature by designing the fingerprint apparatus with an arc-shaped surface instead of a plane structure. This provides three-dimensional appearance and aesthetic appeal while the arc surface itself serves as the functional contact surface, eliminating the need for additional complex protective or aesthetic components.
3Object-affected harmful factors
If the arc surface structure is added to improve appearance and reduce dust, then the aesthetic appeal and dust resistance are improved, but the device structure becomes more complex
Solution Approach 1:
The patent uses the arc-shaped surface as the primary functional element that simultaneously provides dust resistance, aesthetic appeal, and structural integrity. The curved surface geometry naturally prevents dust accumulation without requiring additional protective coatings or components, maintaining manufacturing simplicity.
Solution Approach 2:
The arc surface structure serves multiple functions simultaneously: it provides the aesthetic appearance, prevents dust and substance adsorption, and acts as the functional contact surface for fingerprint sensing. This multi-functionality eliminates the need for separate components, keeping the overall structure simple.
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 arc-shaped design improves fingerprint identification performance by reducing dust accumulation and protecting the apparatus from damage, while offering a more aesthetically pleasing and user-friendly experience.
Implementation Method 1
high temperature resistant ultraviolet, UV, light glue
Implementation Method 2
dielectric constant of the arc surface structure is greater than 3.4
Implementation Method 3
dielectric constant of the arc surface structure is greater than 3.4
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
A capacitive fingerprint identification apparatus, a preparation method and an electronic device can improve the performance of a capacitive fingerprint apparatus and the users' using experience. The capacitive fingerprint identification apparatus is configured to be provided on an arc-shaped surface of the electronic device, including: a capacitive fingerprint identification package structure; an arc surface structure, including a first surface and a second surface, where the first surface of the arc surface structure is a plane, the second surface of the arc surface structure is an arc surface, and the first surface of the arc surface structure is connected to first surface of the capacitive fingerprint identification package structure, and the first surface of the capacitive fingerprint identification package structure is a side facing the outside of electronic device. Setting the arc surface structure on the capacitive fingerprint identification apparatus can not only make itself and the electronic device where it is located more aesthetical in appearance and have a more three-dimensional sense, but also protect the electronic device when the electronic device is dropped, so the influence on the capacitive fingerprint identification apparatus is small. Dust and the like are difficult to be absorbed on the arc-shaped surface of the capacitive fingerprint identification apparatus, and the influence on fingerprint identification is small.