Under-Display Fingerprint Collection Section Switching
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Solution Overview
Problem
Under-display fingerprint recognition systems are vulnerable to 'residue reuse' where remaining fingerprint traces on the screen can deceive the scanner into unlocking the device, posing serious security risks.
Innovation Solution
A fingerprint collection method that determines a target effective section different from the historical effective section, displaying an indication to guide the user for fingerprint collection, ensuring that the same fingerprint traces are not reused, thereby preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the under-display fingerprint recognition function uses optical technology to capture user fingerprint images, then the fingerprint recognition function can be integrated into the display screen, but remaining fingerprint traces on the display screen can be reused to deceive the scanner, causing security risks
Solution Approach 1:
The fingerprint collection section is divided into multiple effective sections, and the system dynamically switches between different effective sections for fingerprint collection. This segmentation prevents residue reuse because each section captures fingerprint data from a different spatial location, making it impossible for traces from one section to authenticate successfully in another section.
Solution Approach 2:
The system pre-determines multiple effective sections and their corresponding indications before fingerprint collection begins. By preparing multiple valid fingerprint collection areas in advance and guiding the user to specific sections through displayed indications, the system ensures that residue from previous authentication attempts cannot be reused, as the effective section changes with each authentication attempt.
2Area of stationary object
If the fingerprint collection section is made smaller than or equal to the display output section, then the fingerprint recognition area is optimized, but the system must dynamically change effective sections to prevent residue reuse, increasing system complexity
Solution Approach 1:
Different effective sections within the fingerprint collection area are assigned different functions or properties. Each section has its own indication displayed at the corresponding display location, and the system selectively activates specific sections based on authentication requirements. This local differentiation allows the system to prevent residue reuse while maintaining an optimized collection area size.
Solution Approach 2:
The system changes the effective section parameter dynamically between authentication attempts. By switching which section is currently effective for fingerprint collection and updating the corresponding displayed indication, the system prevents residue reuse without requiring physical hardware changes, thereby managing complexity through software-controlled parameter variation.
Data Source
AI summary
A fingerprint collection method includes obtaining a historical effective section for fingerprint collection, determining a target effective section for performing a fingerprint collection operation based on the historical effective section, and generating an indication based on the target effective section. The historical effective section is a partial section of a fingerprint collection section, the fingerprint collection section corresponds to a display output section of a display screen, and the fingerprint collection section is smaller than or equal to the display output section. The target effective section and the historical effective section are different. The indication is displayed at a target display section of the display output section, and the target effective section corresponds to the target display section.