Integrated Touchpad Fingerprint Sensor Line Configuration
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Solution Overview
Problem
Current secure computer systems require separate devices for fingerprint authentication and cursor control, leading to increased cost and complexity, necessitating the integration of fingerprint recognition into existing peripheral components.
Innovation Solution
An apparatus with a touchpad and integrated controller IC that combines fingerprint recognition and touch detection, utilizing distinct TX and RX line configurations for fingerprint and touch sensing modes, allowing for simultaneous recognition of touch events and fingerprint authentication without additional devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate fingerprint recognition device and touchpad device are used, then fingerprint authentication and cursor control functions are provided, but cost and device complexity increase
Solution Approach 1:
The patent merges the fingerprint recognition device and touchpad device into a single integrated apparatus. The touchpad includes both a touch area for cursor control and a fingerprint area for authentication, combining two previously separate functions into one device structure.
Solution Approach 2:
The integrated touchpad serves multiple functions: it acts as both a cursor control device and a fingerprint authentication device. The same physical device structure supports both touch event recognition and fingerprint pattern recognition, making it a multi-functional universal device.
2Adaptability or versatility
If separate fingerprint recognition device and touchpad device are used, then fingerprint authentication and cursor control functions are provided, but cost increases
Solution Approach 1:
The patent merges the fingerprint recognition device and touchpad device into a single integrated apparatus. The touchpad includes both a touch area for cursor control and a fingerprint area for authentication, combining two previously separate functions into one device structure.
3Measurement precision
If distinct TX and RX line configurations are used for fingerprint and touch sensing, then accurate fingerprint recognition and touch detection are achieved, but device complexity increases
Solution Approach 1:
The touchpad is segmented into distinct functional areas: a touch area with its own TX and RX lines for cursor control, and a fingerprint area with separate TX and RX lines for authentication. This segmentation allows each area to be optimized independently while sharing the same overall device structure.
Solution Approach 2:
Different regions of the touchpad have different line configurations optimized for their specific functions. The fingerprint area has denser line spacing for high-resolution fingerprint capture, while the touch area has spacing optimized for touch gesture detection, allowing each region to have local quality tailored to its purpose.
Data Source
AI summary
An apparatus integrated with fingerprint recognition and touch detection is provided. The apparatus includes a touchpad and a controller IC. The touchpad has a touch area for recognizing a touch event and a fingerprint area for recognizing a fingerprint and the touch event. The fingerprint area includes TX lines of a first group crossing RX lines of a first group. The touch area includes TX lines of the first group and a second group crossing RX lines of the first group and a second group. When the apparatus is operated in a fingerprint sensing mode, the controller IC supplies a driving signal to the TX lines of the first group. When the apparatus is operated in a touch sensing mode, the controller IC supplies the driving signal to the TX lines of the second group and a portion of the TX lines of the first group.