Capacitive Fingerprint Sensor with Segmented Sensing Lines
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current fingerprint collection using slide-type capacitive touch-sensing technology is time-consuming and cumbersome, requiring multiple data collections to form a complete fingerprint image.
Innovation Solution
The design of fingerprint identification devices with optimized first driving lines and sensing lines, divided into sensing sub-groups and differential pairs, allows for more efficient data acquisition during scanning, reducing the time needed for fingerprint detection and improving accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If a slide-type sensor is used for fingerprint collection, then the surface area and power consumption are reduced, but the data collection process becomes time-consuming and cumbersome
Solution Approach 1:
The sensing lines are divided into multiple sensing groups arranged in different directions, with each group containing multiple sensing sub-groups. This segmentation allows the sensor to collect fingerprint data from multiple directions simultaneously, reducing the total collection time while maintaining a compact sensor area.
2Measurement precision
If multiple data collections are performed to form a complete fingerprint image, then the fingerprint image completeness is improved, but the detection time increases
Solution Approach 1:
The patent introduces sensing lines extending in multiple directions (first predetermined direction and second predetermined direction) to collect fingerprint data from different spatial dimensions. This multi-directional sensing approach enables complete fingerprint image acquisition in a single scanning pass, eliminating the need for multiple sequential data collections and significantly improving detection speed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables faster and more accurate fingerprint identification by acquiring more data in less time, reducing the need for multiple data collections and improving the accuracy of fingerprint images.
Implementation Method 1
a fingerprint touch function is mainly achieved by a capacitive touch-sensing technology
Data Source
AI summary
The present disclosure provides a fingerprint identification device, a touch panel and a display device. The fingerprint identification device includes a plurality of first driving lines extending in a first predetermined direction and a plurality of first sensing lines extending in a second predetermined direction that is not parallel to the first predetermined direction. The first sensing lines are divided into at least two sensing groups in the first predetermined direction, each sensing group includes a plurality of sensing sub-groups arranged side by side in the second predetermined direction, each sensing sub-group includes at least one of the first sensing lines, and the adjacent sensing sub-groups are insulated from each other.