Integrated Ultrasonic Fingerprint Sensor TFT Substrate
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Solution Overview
Problem
Existing electronic devices with fingerprint identification functions face challenges in integrating fingerprint sensors seamlessly with other components, leading to complex manufacturing processes and potential inefficiencies in response time and accuracy.
Innovation Solution
An electronic device design that integrates a fingerprint identify module with a ultrasonic fingerprint sensor, comprising a contact layer, signal transmitter and receiving layers, insulating layer, and TFT arrays on a substrate, which uses ultrasonic signals to identify fingerprints by generating and processing superposed ultrasonic signals for improved response time and accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the fingerprint sensor is independently mounted from other components, then the manufacturing process becomes complex and response time increases, but the fingerprint identification accuracy can be maintained
Solution Approach 1:
The patent merges the fingerprint sensor with the display module by integrating the sensor electrodes into the display structure. The sensor electrodes are formed in the same manufacturing process as the display electrodes, eliminating the need for separate mounting and reducing device complexity while maintaining manufacturing efficiency
2Manufacturing precision
If the fingerprint sensor is independently mounted from other components, then the manufacturing process becomes complex, but the fingerprint identification accuracy can be maintained
Solution Approach 1:
The fingerprint sensor and display module are merged into a single integrated structure where sensor electrodes and display electrodes coexist in the same layer structure. This integration maintains manufacturing precision for fingerprint identification while eliminating the complexity of separate component mounting through unified manufacturing processes
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
The integrated design enhances manufacturing efficiency and improves fingerprint identification accuracy by utilizing ultrasonic signals to differentiate between fingerprint ridges and valleys, resulting in a more efficient and accurate fingerprint recognition process.
Implementation Method 1
uses ultrasonic signals to identify fingerprints by generating and processing superposed ultrasonic signals
Data Source
AI summary
An electronic device comprises a display module for displaying images, an identify module and a substrate where the display module and the identify module located on. When an object is pressed against the electronic device, the identify module obtains a grayscale image of the object pressed against the electronic device to identify the object. The identify module comprise a first thin film transistor (TFT) array. The display module comprises a second TFT array integrated with the first TFT array to form a TFT substrate arranged on the substrate.