Integrated Array Substrate for Fingerprint and Gesture Identification
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Solution Overview
Problem
Existing display technologies do not integrate gesture and fingerprint identification capabilities with the display screen, requiring additional modules and limiting the utility of silicon-based MEMS arrays.
Innovation Solution
An array substrate is designed with ultrasonic emission and reception sensors integrated into the display and non-display areas, using piezoelectric layers with varying thicknesses and materials to enable both fingerprint and gesture identification, while maintaining display functionality without overlapping sensor projections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional modules are added for gesture and fingerprint identification, then identification functionality is improved, but device complexity increases
Solution Approach 1:
The patent merges the ultrasonic emission sensor and ultrasonic reception sensor directly into the array substrate structure. The emission sensor is positioned in the non-display area while the reception sensor is integrated with the pixel circuit layer in the display area, eliminating the need for separate gesture identification modules and fingerprint identification modules. This integration resolves the technical contradiction by combining multiple identification functions into the existing display substrate, thereby improving versatility without proportionally increasing device complexity.
Solution Approach 2:
The array substrate is designed to serve multiple functions: display function through the pixel circuit layer, gesture identification through the ultrasonic emission and reception sensors, and fingerprint identification through the integrated sensor system. By making the array substrate universal and multi-functional, the patent resolves the contradiction by enabling the same substrate to perform diverse functions without requiring separate dedicated modules for each function.
2Ease of manufacture
If sensor projections overlap, then integration is simplified, but ultrasonic wave reception accuracy deteriorates
Solution Approach 1:
The patent resolves the spatial conflict between emission and reception sensors by utilizing different spatial dimensions and areas. The ultrasonic emission sensor is positioned in the non-display area while the ultrasonic reception sensor is positioned in the display area with non-overlapping projections. This dimensional separation ensures that ultrasonic waves emitted for gesture detection do not directly interfere with the reception of reflected waves for fingerprint identification, thereby maintaining measurement precision while achieving integration through careful spatial arrangement.
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 array substrate can perform fingerprint and gesture identification in addition to display functions, enhancing its utility without the need for additional modules and ensuring efficient ultrasonic wave conversion and identification.
Implementation Method 1
an ultrasonic emission sensor (1), a substrate (2) over the ultrasonic emission sensor (1), a pixel circuit layer (3) over the substrate (2), and an ultrasonic reception sensor (4) over the pixel circuit layer (3)
Implementation Method 2
an ultrasonic emission sensor (1), a substrate (2) over the ultrasonic emission sensor (1), a pixel circuit layer (3) over the substrate (2), and an ultrasonic reception sensor (4) over the pixel circuit layer (3)
Data Source
AI summary
The present application provides in some embodiments an array substrate, a display panel, a display device and a method for manufacturing the array substrate. The present application provides in some embodiments an array substrate, the array substrate comprising: an ultrasonic emission sensor, a substrate over the ultrasonic emission sensor, a pixel circuit layer over the glass substrate, and an ultrasonic reception sensor over the TFT pixel circuit layer, the ultrasonic reception sensor being electrically connected to the pixel circuit layer, wherein projections of the ultrasonic emission sensor and the ultrasonic reception sensor in a direction perpendicular to the substrate do not overlap with each other.