Touch Panel Fingerprint Recognition Electrode Bending
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Solution Overview
Problem
Conventional display devices with integrated fingerprint recognition sensors increase thickness due to the addition of a separate fingerprint sensor, which complicates the manufacturing process and affects device rigidity.
Innovation Solution
A touch panel with a substrate featuring a touch recognition area and a fingerprint recognition area, where sensing electrodes and connection electrodes are strategically arranged to enable fingerprint recognition without a separate sensor, integrated with a display panel and cover glass, allowing for reduced thickness and improved sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate fingerprint sensor is added to the display device, then fingerprint recognition function is achieved, but device thickness increases
Solution Approach 1:
The patent combines the fingerprint sensor with the touch panel into a single integrated structure. The sensing electrodes for fingerprint recognition are formed on the same substrate as the touch sensing electrodes, eliminating the need for a separate fingerprint sensor layer and thereby preventing thickness increase while achieving fingerprint recognition functionality.
Solution Approach 2:
The touch panel substrate serves multiple functions: it acts as both the touch sensing layer and the fingerprint recognition layer. The sensing electrodes are designed to perform both touch detection and fingerprint pattern recognition, allowing one component to fulfill multiple roles and avoiding additional thickness from separate sensors.
2Adaptability or versatility
If a separate fingerprint sensor is added to the display device, then fingerprint recognition function is achieved, but manufacturing process becomes complicated
Solution Approach 1:
By merging the fingerprint sensor and touch panel into a single integrated component, the manufacturing process is simplified. The sensing electrodes are formed using the same fabrication processes as the touch panel, eliminating the need for separate manufacturing steps for a distinct fingerprint sensor and reducing overall process complexity.
Solution Approach 2:
The sensing electrodes are designed with multi-functionality, serving both touch detection and fingerprint recognition purposes. This universal design allows a single manufacturing process to produce components that perform multiple functions, thereby simplifying the manufacturing process while achieving fingerprint recognition capability.
3Adaptability or versatility
If a separate fingerprint sensor is added to the display device, then fingerprint recognition function is achieved, but device rigidity is affected
Solution Approach 1:
The integration of the fingerprint sensor with the touch panel eliminates the need for additional separate sensor layers that would compromise structural integrity. The unified design maintains the original rigidity of the display device while incorporating fingerprint recognition functionality through the existing structural framework.
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 solution integrates fingerprint recognition functionality into the touch panel without increasing device thickness, enhancing sensitivity while maintaining rigidity, by using a shared layer structure and optimized electrode arrangements.
Implementation Method 1
capacitive sensors may utilize an arrangement of adjacent sensing electrodes and recognize a fingerprint using a capacitance difference based on a distance between a ridge and a valley of the fingerprint
Data Source
AI summary
A touch panel includes: a substrate having a touch recognition area and a fingerprint recognition area; a plurality of first sensing electrodes in the touch recognition area on the substrate; and a first connection electrode connecting adjacent ones of the first sensing electrodes in a first direction. A portion of the first connection electrode adjacent to the fingerprint recognition area is bent along an edge of the fingerprint recognition area.