Flexible Display Mesh Electrodes for Bending-Region Fingerprint Sensing

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing electronic devices with illuminating and displaying functions fail to meet consumer expectations in quality and functionality, particularly in flexible displays with integrated capacitive fingerprint sensors.

Innovation Solution

Incorporation of a flexible display with a capacitive fingerprint sensor, signal lines, and a mesh structure for signal connections, allowing for differential color display in bending regions and improved sensor resolution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a capacitive fingerprint sensor is integrated on the flexible display, then fingerprint recognition function is added, but the display quality and sensor accuracy deteriorate in bending regions

Engineering Contradiction:

Improvefingerprint recognition functionVSAvoidsensor accuracy

Core Design Contradiction:

Adaptability or versatilityVSMeasurement precision

Solution Approach 1:

The patent applies local quality by differentiating the treatment of signal lines in flat regions versus bending regions. In bending regions, the signal lines are configured as mesh structures with openings to accommodate display elements, while in flat regions, conventional signal line configurations are used. This localized adaptation maintains sensor accuracy despite the structural differences required for flexible display functionality.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The signal lines are segmented into mesh structures with multiple openings rather than continuous traces. This segmentation allows the signal lines to navigate around display elements in bending regions while maintaining electrical connectivity to the fingerprint sensor, thus preserving measurement precision across different display regions.

Inventive Principle:

Principle #1Segmentation

2Illumination intensity

If signal lines are configured in bending regions with mesh structures, then display quality is maintained, but signal transmission reliability may deteriorate

Engineering Contradiction:

Improvedisplay qualityVSAvoidsignal transmission reliability

Core Design Contradiction:

Illumination intensityVSReliability

Solution Approach 1:

The patent transitions from conventional two-dimensional signal line traces to a mesh structure that utilizes multiple dimensions and pathways. The mesh configuration provides redundant signal transmission routes, ensuring that even if some pathways are interrupted by display elements, signal transmission reliability is maintained through alternative paths.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The mesh structure serves multiple functions simultaneously: it maintains display quality by allowing light emission through openings, provides redundant signal transmission paths for reliability, and accommodates the flexible bending region requirements. This multi-functionality resolves the contradiction between display quality and signal reliability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If multiple light emitting diodes with different colors are placed in bending region openings, then display versatility is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvedisplay color capabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent merges multiple light emitting diodes with different colors into a single integrated display structure within the bending region openings. Rather than treating each colored LED as a separate component requiring individual placement, the design integrates them into a unified mesh structure configuration, simplifying the manufacturing process while maintaining color versatility.

Inventive Principle:

Principle #5Merging (Combining)

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

Enhances the performance and functionality of flexible electronic devices by maintaining display quality and fingerprint recognition accuracy even in bending modes.

Implementation Method 1

The flexible display includes a plurality of light emitting diodes

Methodology Applied

Scientific EffectLight emitting diode: Light Emitting Diode

Implementation Method 2

The capacitive fingerprint sensor is disposed on the flexible display

Methodology Applied

Scientific EffectCapacitance: Capacitance

Data Source

PatentUS12536926B2Electronic device

Publication Date: 2026.01.27 INNOLUX CORP

AI summary

An electronic device includes a flexible display, a sensor electrode, and a plurality of signal lines. The flexible display includes a plurality of light emitting diodes. The sensor electrode is disposed on the flexible display. The plurality of signal lines is electrically connected to the sensor electrode, wherein the plurality of signal lines includes a mesh structure, the mesh structure includes a first opening, and a second opening adjacent to the first opening, in the at least a portion of a bending region, one of the plurality of light emitting diodes is in the first opening, another one of the plurality of light emitting diodes is in the second opening, and a displaying color of the one of the plurality of light emitting diodes in the first opening is different from a displaying color of the another one of the plurality of light emitting diodes in the second opening.