Full-Screen Fingerprint Identification Using Switchable Wire Mesh
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Solution Overview
Problem
Current fingerprint identification systems in mobile devices require separate touch panels and fingerprint identification devices, leading to increased product size, complex layouts, and reduced service life due to separate components.
Innovation Solution
A full-screen fingerprint identification method and device that integrates fingerprint identification into a touch panel using a densely disposed wire mesh of metal wires connected to a switch unit, allowing for conductive and non-conductive regions for fingerprint identification and touch control operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate touch panel and fingerprint identification device are used, then fingerprint identification function can be implemented, but product size increases and layout becomes complex
Solution Approach 1:
The patent merges the fingerprint identification device with the touch panel by using the same wire mesh structure for both functions. The touch panel's wire mesh is configured to serve dual purposes: touch sensing and fingerprint identification, thereby integrating two separate devices into one unified component and reducing overall product complexity.
Solution Approach 2:
The wire mesh structure is designed with multi-functionality, serving as both the touch panel sensing layer and the fingerprint identification electrode. By making the wire mesh universal for both touch control and fingerprint recognition, the patent eliminates the need for separate dedicated components for each function.
2Reliability
If separate touch panel and fingerprint identification device are used, then fingerprint identification function can be implemented, but service life is reduced
Solution Approach 1:
By combining the fingerprint identification electrodes with the touch panel wire mesh, the patent ensures that both functions share the same structural support and manufacturing process. This integration improves service life by eliminating the additional wear and tear associated with separate components and ensuring they degrade together uniformly.
3Reliability
If separate devices are used, then fingerprint identification can be implemented, but manufacturing complexity increases
Solution Approach 1:
The patent combines the manufacturing processes for the touch panel and fingerprint identification device into a single production line. The wire mesh is manufactured once and serves both functions, eliminating the need for separate assembly steps and reducing manufacturing complexity while maintaining reliable fingerprint identification capability.
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 enables compact, efficient, and reliable fingerprint identification across the full screen, enhancing product compactness and service life by utilizing projected capacitive touch control for mutual capacitive induction, combining fingerprint and touch control functions effectively.
Implementation Method 1
utilizing projected capacitive touch control for mutual capacitive induction
Data Source
AI summary
A full-screen fingerprint identification method includes disposing a wire mesh on a touch panel. The wire mesh includes a plurality of metal wires. The metal wires are connected to a switch unit. A fingerprint identification area is appointed on the touch panel, and a portion of the switch unit associated with the metal wires in the fingerprint identification area is turned on to make the metal wires in the fingerprint identification area conductive for fingerprint identification. A full-screen fingerprint identification device includes a touch panel and a wire mesh disposed on the touch panel. The wire mesh includes a plurality of metal wires connected to a switch unit. The touch panel includes a fingerprint identification area. A portion of the switch unit associated with the metal wires in the fingerprint identification area can be turned on to make the metal wires in the fingerprint identification area conductive for fingerprint identification.