Fingerprint Sensor Slim Profile Integration
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Solution Overview
Problem
Fingerprint sensors in terminals often require protection assemblies that increase their thickness, making them unsuitable for thin terminal designs due to the added rigidity and thickness from the protection elements.
Innovation Solution
A fingerprint sensor design that includes a chip assembly with a protection assembly that surrounds the peripheral side of the chip, using a sealing element and protection elements that are thin enough not to increase the overall thickness, allowing the sensor to be exposed externally while maintaining rigidity for mounting convenience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a protection assembly is added to the fingerprint sensor, then the rigidity and protectability are improved, but the thickness increases making it unsuitable for thin terminals
Solution Approach 1:
The patent merges the protection assembly with the fingerprint sensor chip assembly by integrating the protection element directly onto the circuit board, making them a unified structure rather than separate components. This integration eliminates the need for additional thickness while maintaining protective functionality.
Solution Approach 2:
The patent employs a thin film protection element that provides rigid protection while maintaining minimal thickness. The protection element is designed as a thin structure that covers the peripheral side of the chip assembly, offering rigidity without significantly increasing the overall thickness of the fingerprint sensor.
2Reliability
If a protection assembly is added to the fingerprint sensor, then the protectability is improved, but the device complexity increases
Solution Approach 1:
The protection assembly is merged with the chip assembly structure, where the protection element is integrated directly onto the circuit board. This merging reduces device complexity by eliminating separate protection components and simplifying the overall structure while maintaining protective functionality.
Solution Approach 2:
The circuit board serves multiple functions: it provides electrical connections, structural support, and integrates the protection element. This multi-functionality reduces the need for separate dedicated protection components, thereby simplifying the overall device structure while maintaining protectability.
Data Source
AI summary
A fingerprint sensor and a related terminal are provided. The fingerprint sensor includes a chip assembly and a protection element. The chip assembly includes a circuit board and a sealing element laminated on the circuit board. The protection assembly includes a first protection element. The circuit board is engaged with the first protection element to define a space to receive the sealing element, or the sealing element is engaged with the first protection element to define a space to receive the circuit board.