Fingerprint Sensor Touch Pressure Detection via Texture Data
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch pressure detection solutions for mobile terminals face challenges such as complex structures, high costs, low detection sensitivities, and large volumes, making them difficult to implement effectively.
Innovation Solution
A touch pressure detection apparatus and method utilizing a fingerprint sensor module with multiple pixels to collect texture information data, calculating touch pressure based on the collected data without additional hardware or structure, leveraging existing fingerprint recognition technology.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a piezoresistive detection solution with a piezoresistor sensor mounted on the bottom of the panel is used, then touch pressure can be detected through resistance change, but the structure becomes complex and difficult to implement
Solution Approach 1:
The fingerprint sensor is designed to perform multiple functions: both fingerprint recognition and touch pressure detection. By reusing the existing sensor array and processing circuitry for dual purposes, the system avoids the need for separate piezoresistive sensors and reduces structural complexity while maintaining detection capability
Solution Approach 2:
The patent combines fingerprint sensing and pressure detection functions into a single integrated sensor system. The fingerprint sensor array simultaneously captures ridge-valley patterns and pressure information, merging two detection functions into one unified structure that eliminates the need for separate mounting assemblies
2Measurement precision
If a piezoresistor sensor is mounted flatly below the panel to detect pressure changes, then touch pressure can be measured, but the assembling process becomes difficult
Solution Approach 1:
The fingerprint sensor module is designed as a self-contained unit that performs both fingerprint capture and pressure sensing without requiring separate mounting procedures. The sensor array and processing electronics are integrated in a way that eliminates the need for precise flat mounting and complex assembly steps
Solution Approach 2:
The same sensor module serves dual purposes for fingerprint recognition and pressure detection, eliminating the need for separate piezoresistive sensor assemblies and their associated mounting procedures, thereby simplifying the manufacturing process
3Measurement precision
If additional pressure detection hardware is added to the mobile terminal, then touch pressure can be detected, but the device volume increases
Solution Approach 1:
The existing fingerprint sensor is utilized for dual purposes: fingerprint recognition and touch pressure detection. This eliminates the need for additional dedicated pressure sensing hardware, thereby avoiding any increase in device volume while achieving pressure detection capability
Solution Approach 2:
The fingerprint sensor system performs self-service by simultaneously executing fingerprint capture and pressure measurement functions using the same hardware resources, eliminating the need for extra detection components that would increase device size
4Measurement precision
If a piezoresistive detection solution is implemented, then touch pressure can be detected, but the cost increases due to sensor and structure expenses
Solution Approach 1:
The fingerprint sensor module is designed to perform multiple functions including both fingerprint recognition and touch pressure detection. By reusing the existing sensor array, processing circuitry, and associated components for dual purposes, the system eliminates the need for separate piezoresistive sensors and reduces overall component costs
Solution Approach 2:
The fingerprint sensor system provides self-service by simultaneously handling fingerprint capture and pressure measurement tasks, eliminating the need for additional dedicated pressure sensing components and their associated manufacturing costs
5Measurement precision
If a fingerprint sensor is used for touch pressure detection, then the detection sensitivity increases and cost decreases, but additional functionality must be integrated
Solution Approach 1:
The fingerprint sensor is designed to perform multiple functions: both fingerprint recognition and touch pressure detection. By reusing the existing sensor array and processing circuitry for dual purposes, the system avoids the need for separate piezoresistive sensors and reduces structural complexity while maintaining detection capability
Solution Approach 2:
The system dynamically adapts the fingerprint sensor's functionality based on operational context, switching between fingerprint recognition mode and pressure detection mode or performing both simultaneously, thereby achieving multi-functionality without requiring separate dedicated hardware for each function
Data Source
AI summary
The present invention discloses an apparatus and a method for detecting a touch pressure. The apparatus includes a fingerprint sensor module and a touch pressure calculating module, where the fingerprint sensor module includes a plurality of pixels, in which: the fingerprint sensor module configured to collect, via the plurality of pixels, texture information data of a body part touching the fingerprint sensor module; the touch pressure calculating module configured to calculate a touch pressure of the body part according to the collected texture information data, thereby achieving the detection of the touch pressure by virtue of an existing fingerprint sensor.