Display Substrate Ultrasonic Fingerprint Recognition via Vibrator Integration
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Solution Overview
Problem
Current fingerprint recognition technologies in mobile products require separate touch areas and complex manufacturing processes due to the integration of fingerprint devices in non-display areas, which complicates the integration of biometric functions with display technology.
Innovation Solution
A display substrate with a base substrate, vibrators, and identification units integrated into the display area, where vibrators emit ultrasonic signals for fingerprint or palm print recognition, and identification units convert these signals into electrical signals for texture information, eliminating the need for a separate touch area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fingerprint device is arranged in non-display area, then fingerprint recognition function is achieved, but device complexity increases due to separate touch area requirement
Solution Approach 1:
The patent combines the fingerprint recognition function with the display area by integrating identification units directly into the display substrate. The identification units are positioned between adjacent display units, allowing the display screen itself to serve as the fingerprint recognition interface, thereby eliminating the need for separate touch areas and reducing overall device complexity
Solution Approach 2:
The display substrate is designed to perform multiple functions: it serves both as the display interface and as the fingerprint recognition interface. The identification units integrated into the display area enable the screen to simultaneously display information and capture fingerprint or palm print textures, making the device more versatile without adding separate components
2Ease of manufacture
If identification unit is placed in display area, then manufacturing process is simplified, but display area is occupied by identification components
Solution Approach 1:
The identification units are strategically positioned in specific locations within the display area, specifically between adjacent display units. This localized placement allows the majority of the display area to remain fully functional while incorporating fingerprint recognition capability in targeted regions where it can effectively capture fingerprint or palm print textures without significantly compromising overall display space
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 integration simplifies the manufacturing process and enables accurate fingerprint or palm print recognition directly on the display substrate, enhancing user experience and security without additional hardware.
Implementation Method 1
Each of the at least one identification unit includes a first electrode, a second electrode, and a piezoelectric material layer between the first electrode and the second electrode
Implementation Method 2
The at least one identification unit is configured to receive an ultrasonic signal reflected by an object to be detected, and convert the ultrasonic signal into a first electrical signal
Data Source
AI summary
A display substrate, a method for driving the same and a display device are provided. The display substrate includes a first base substrate, at least one vibrator and at least one identification unit. The at least one identification unit is on the first base substrate, the at least one identification unit is in a display area of the display substrate, and the at least one vibrator is on a side of the first base substrate facing away from the identification unit. The at least one vibrator is configured to drive the first base substrate to vibrate to emit an acoustic signal; and the at least one identification unit is configured to receive an ultrasonic signal reflected by an object to be detected, and convert the ultrasonic signal into a first electrical signal.