Touch Panel Fingerprint Recognition Film Layer Integration

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing design of fingerprint recognition modules in display panels limits full-screen functionality due to their placement in non-display regions, restricting the implementation of full-screen designs and affecting fingerprint recognition quality.

Innovation Solution

A touch panel design incorporating a fingerprint recognition film layer with patterns arranged within the touch film layer's hollow regions, allowing for capacitive fingerprint recognition across the entire panel surface without interfering with touch functionality, and ensuring light efficiency by positioning recognition patterns to avoid illuminating sub-pixels.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the fingerprint recognition module is arranged in a non-display region, then the fingerprint recognition function is implemented, but the full-screen design is limited

Engineering Contradiction:

Improvefull-screen design capabilityVSAvoidmodule arrangement complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges the fingerprint recognition module with the touch film layer by integrating the fingerprint recognition film layer into the touch panel structure. The fingerprint recognition electrodes are arranged within the hollow regions of the touch electrode patterns, combining two functional modules into a single integrated structure, thereby enabling full-screen design without separate non-display region placement

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The fingerprint recognition film layer is nested within the hollow regions of the touch film layer's electrode patterns. This nesting arrangement allows the fingerprint recognition electrodes to be positioned inside the spaces already created by the touch electrode geometry, maximizing space utilization and enabling full-screen coverage without additional complexity

Inventive Principle:

Principle #7Nested doll (Nesting)

2Area of stationary object

If the fingerprint recognition film layer is integrated with the touch film layer, then full-screen fingerprint recognition is enabled, but interference with touch functionality may occur

Engineering Contradiction:

Improvefingerprint recognition coverage areaVSAvoidtouch detection accuracy

Core Design Contradiction:

Area of stationary objectVSReliability

Solution Approach 1:

The patent applies local quality by positioning the fingerprint recognition electrodes specifically within the hollow regions of the touch electrode patterns. This localized arrangement ensures that fingerprint recognition occurs only in specific areas where it is needed, while the surrounding touch electrode areas maintain their original touch detection functionality without interference

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The touch film layer is segmented into solid electrode regions and hollow regions. The fingerprint recognition film layer is then placed specifically in the hollow regions, creating a segmented functional distribution where touch detection and fingerprint recognition operate in separate but complementary zones, preventing mutual interference

Inventive Principle:

Principle #1Segmentation

3Illumination intensity

If the fingerprint recognition patterns are positioned to avoid illuminating sub-pixels, then display luminosity is maintained, but fingerprint recognition quality may be reduced

Engineering Contradiction:

Improvedisplay luminosityVSAvoidfingerprint recognition accuracy

Core Design Contradiction:

Illumination intensityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by strategically positioning fingerprint recognition patterns in hollow regions that naturally avoid overlap with illuminating sub-pixels. This localized placement ensures that fingerprint recognition areas are selected based on their spatial relationship with the display structure, maintaining both luminosity and recognition quality

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent resolves the conflict by moving the fingerprint recognition patterns to a different spatial dimension - specifically, placing them in the hollow regions between sub-pixels rather than attempting to position them directly over or under the illuminating elements. This dimensional repositioning allows both display luminosity and fingerprint recognition accuracy to be optimized simultaneously

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

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

Enables full-screen fingerprint recognition and improved touch panel performance by distributing fingerprint recognition patterns across the entire panel, enhancing recognition accuracy and quality while maintaining display luminosity.

Implementation Method 1

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS11182581B2Touch panel, manufacturing method thereof and display device

Publication Date: 2021.11.23 KUNSHAN GO VISIONOX OPTO ELECTRONICS CO LTD

AI summary

The present application relates to the field of touch technologies, and particularly to a touch panel, a manufacturing method thereof, and a display device. A touch panel, includes: a touch film layer and a fingerprint recognition film layer, an orthographic projection of the fingerprint recognition film layer on the touch panel at least partially coincides with an orthographic projection of the touch film layer on the touch panel.