Biometric Sensor Block Activation From Touch Location Signals
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Solution Overview
Problem
Current electronic devices with biometric sensors require a full scan for biometric identification, which is time-consuming and power-intensive.
Innovation Solution
An electronic device comprising a touch sensing layer, a touch sensor, a biometric sensor with multiple sensing blocks, and a driver that drives specific sensing blocks based on touch location signals, allowing for targeted data reading without a full scan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full scan is performed for biometric identification, then complete biometric data is obtained, but time consumption and power consumption increase
Solution Approach 1:
The biometric sensor is divided into multiple sensing blocks that can be independently activated. Instead of scanning the entire sensor area, only the sensing block containing the touch location is activated for data acquisition, significantly reducing the scanned area while maintaining complete biometric data capture within that block
Solution Approach 2:
The system activates only the specific sensing block where touch is detected, applying different operational states to different regions of the sensor. The touched sensing block is activated for data acquisition while other blocks remain inactive, optimizing resource usage based on local needs
2Measurement precision
If a full scan is performed for biometric identification, then complete biometric data is obtained, but power consumption increases
Solution Approach 1:
The biometric sensor is segmented into multiple independently controllable sensing blocks. The driver circuit activates only the specific sensing block where touch is detected, rather than activating the entire sensor array, thereby reducing power consumption while maintaining complete biometric data acquisition within the activated block
Solution Approach 2:
The system performs partial scanning by activating only the necessary sensing block containing the touch location, rather than performing a complete full-scan of all sensing blocks. This partial action is sufficient to obtain complete biometric data from the touched area while consuming less power
3Use of energy by moving object
If only a portion of sensing blocks is driven, then power consumption and time are reduced, but data acquisition completeness may be compromised
Solution Approach 1:
The system activates only the sensing block corresponding to the touch location, ensuring that complete biometric data is captured from the relevant area. The local activation strategy maintains data completeness for the touched region while avoiding unnecessary power consumption from activating other blocks
Data Source
AI summary
An electronic device includes a touch sensing layer, a touch sensor, a biometric sensor and a driver. The touch sensor is used to identify a touch location and output a touch signal upon the touch sensing layer being touched. The biometric sensor includes a plurality of sensing blocks, and is used to generate electrical signals corresponding to biometric data. The driver is coupled to the touch sensor and the biometric sensor, and is used to drive a portion of the plurality of sensing blocks according to the touch signal.