Flexible Display Module Layout for Full-Screen Fingerprint Sensing
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Solution Overview
Problem
Current fingerprint identification technologies cannot achieve full-screen fingerprint recognition as they require separate hardware devices and cannot identify fingerprints within the display area, limiting their functionality.
Innovation Solution
A flexible display module with island-shaped structures, electrical connection structures, and photosensitive structures that allow for full-screen fingerprint identification by arranging photosensitive structures between light-emitting units, enabling fingerprint recognition anywhere on the display area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate hardware devices (tactile switches, capacitive elements, fingerprint identification sensors) are set at fingerprint touch positions, then fingerprint identification function is achieved, but full-screen fingerprint identification cannot be realized and fingerprints can only be identified in a fixed area
Solution Approach 1:
The patent combines the fingerprint identification function with the display structure by integrating photosensitive structures between the light-emitting units (island-shaped structures). This merging allows the display screen itself to serve as the fingerprint identification area, enabling full-screen fingerprint identification without adding separate dedicated hardware devices for each fingerprint sensing position.
Solution Approach 2:
The display screen structure is designed to perform multiple functions: it serves both as the light-emitting display and as the fingerprint identification sensor array. The photosensitive structures integrated between the island-shaped light-emitting units enable the display to simultaneously function as both visual output and biometric authentication interface, achieving full-screen fingerprint identification capability.
2Adaptability or versatility
If photosensitive structures are disposed between island-shaped structures, then full-screen fingerprint identification is enabled, but the overlapping area between photosensitive structures and light-emitting units changes during stretching
Solution Approach 1:
The patent designs the photosensitive structures and island-shaped structures with different mechanical properties - the photosensitive structures have greater extensibility while the island-shaped structures maintain structural integrity. This dynamic design allows the overlapping area to change adaptively during stretching: when the display is stretched, the photosensitive structures extend more than the island-shaped structures, maintaining functional alignment despite the changing overlapping area.
Solution Approach 2:
The patent utilizes the differential extensibility parameter between photosensitive structures and island-shaped structures to solve the alignment problem. By designing the photosensitive structures with higher elasticity and extensibility, the system allows the overlapping area to dynamically adjust during stretching, maintaining the functional relationship between light-emitting units and photosensitive detectors while accommodating display deformation.
3Ease of operation
If the flexible display module is stretched, then the overlapping area between photosensitive structures and island-shaped structures decreases, but fingerprint identification accuracy may be affected
Solution Approach 1:
The patent utilizes the differential extensibility parameter between photosensitive structures and island-shaped structures to solve the alignment problem. By designing the photosensitive structures with higher elasticity and extensibility, the system allows the overlapping area to dynamically adjust during stretching, maintaining the functional relationship between light-emitting units and photosensitive detectors while accommodating display deformation.
Solution Approach 2:
The patent designs the photosensitive structures and island-shaped structures with different mechanical properties - the photosensitive structures have greater extensibility while the island-shaped structures maintain structural integrity. This dynamic design allows the overlapping area to change adaptively during stretching: when the display is stretched, the photosensitive structures extend more than the island-shaped structures, maintaining functional alignment despite the changing overlapping area.
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 flexible display module ensures full-screen fingerprint identification by optimizing the arrangement of photosensitive structures relative to light-emitting units, improving sensing accuracy and transmittance of light reflected from finger ridges and valleys.
Implementation Method 1
The photosensitive fingerprint scanning technology obtains information of a reflected light from a surface of a finger through a photosensitive element
Implementation Method 2
The photosensitive fingerprint scanning technology obtains information of a reflected light from a surface of a finger
Data Source
AI summary
A flexible display module and a display terminal are provided. The flexible display module includes a plurality of island-shaped structures, a plurality of electrical connection structures, and a plurality of photosensitive structures. Two adjacent island-shaped structures are stretched and connected by the plurality of electrical connection structures. Each of the photosensitive structures is disposed between two adjacent island-shaped structures. The photosensitive structures are disposed on a side of the island-shaped structures away from a light-emitting direction of the flexible display module.