Fingerprint Sensor Self-Correction Coefficient Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fingerprint sensors require pre-delivery correction, which increases costs and has limited service life due to changing physical characteristics, necessitating frequent recalibration.
Innovation Solution
A fingerprint sensor with a sensing unit, processing unit, and correction unit that calculates and applies new correction coefficients in real-time using a mathematical model, allowing for continuous correction and adaptation to physical changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pre-delivery correction is performed using the two-point correction method, then manufacturing precision is improved, but device complexity and production time increase
Solution Approach 1:
The patent extracts the correction operation from the manufacturing process and relocates it to the user terminal. The fingerprint sensor no longer requires pre-delivery correction, and instead performs self-correction or terminal-based correction after delivery, eliminating complex manufacturing correction steps while maintaining precision.
Solution Approach 2:
The fingerprint sensor is designed to perform self-correction using its own sensing capabilities. The sensor can automatically detect and correct its own parameter deviations without requiring external correction equipment or complex pre-delivery calibration processes, thereby simplifying manufacturing while maintaining precision.
2Measurement precision
If pre-delivery correction is performed, then measurement precision is improved, but productivity decreases due to extended correction time
Solution Approach 1:
The patent implements preliminary correction parameter storage during manufacturing. Correction parameters are pre-calculated and stored in the sensor or associated database, enabling rapid application without time-consuming real-time correction during production, thus maintaining precision while improving productivity.
Solution Approach 2:
The patent replaces physical correction operations (mechanical adjustment, manual calibration) with computational correction methods. Digital correction algorithms and parameter adjustments substitute for time-consuming manual processes, maintaining measurement precision while significantly reducing correction time and improving production efficiency.
3Device complexity
If correction coefficients are fixed after pre-delivery correction, then device complexity is reduced, but adaptability decreases due to physical characteristic changes over time
Solution Approach 1:
The patent implements dynamic correction parameters that can be adjusted based on environmental conditions, usage patterns, and sensor aging. Correction coefficients are no longer fixed but can be updated automatically or semi-automatically, allowing the system to adapt to physical characteristic changes while maintaining manageable complexity through automated update mechanisms.
Solution Approach 2:
The patent incorporates feedback mechanisms where correction parameters are continuously monitored and adjusted based on sensor performance data. The system receives feedback from actual sensing operations and automatically updates correction coefficients to compensate for physical changes, maintaining adaptability while keeping the overall system relatively simple through automated feedback loops.
Data Source
AI summary
A fingerprint sensor and a correction method thereof are provided. The fingerprint sensor includes a sensing part to be touched by a finger, including sensing units, a processing unit, and a correction unit; the sensing unit is configured to sense, when correction starts, a fingerprint signal and output first data; the processing unit is configured to calculate, according to a mathematical model, a new correction coefficient of the corresponding sensing unit by the first data; and the correction unit is configured to correct, according to the new correction coefficient, second data output by the corresponding sensing unit. The fingerprint sensor can automatically modify a correction coefficient when a physical characteristic of the fingerprint sensor changes, thereby reducing the product return rate and prolonging the product service life, omitting a step of correction before delivery, and reducing the manufacturing difficulty and the manufacturing costs.