Display Sensor Electrode Layout to Suppress Moiré Interference

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Solution Overview

Problem

Display devices with integrated sensors experience interference issues, leading to moiré patterns due to the arrangement of detection and driving electrodes within the display area.

Innovation Solution

The sensor-equipped display device incorporates a detection electrode with conductive line fragments arranged in a specific pattern, where connection points have defined pitches that exclude certain ranges relative to pixel pitches, minimizing interference and moiré formation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If detection electrodes and driving electrodes are disposed to overlap with the display area, then sensor detection functionality is achieved, but moiré interference patterns are generated

Engineering Contradiction:

Improvesensor detection functionalityVSAvoidmoiré interference

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The electrode pattern is designed with non-uniform connection point distribution, where connection points are strategically placed at specific pitch ratios (0.3-0.7 times the pixel pitch) rather than uniformly across the display area. This local variation in electrode configuration reduces moiré interference while maintaining detection functionality in critical regions.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The invention changes the spatial parameters of the electrode pattern by defining connection point pitches as specific ratios (0.3-0.7 times the pixel pitch) of the display pixel pitch. This parameter optimization prevents resonance between electrode patterns and display pixels, eliminating moiré while preserving sensor functionality.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If connection points are arranged with regular spacing, then manufacturing is simplified, but moiré patterns occur due to interference with pixel arrangement

Engineering Contradiction:

Improveelectrode pattern fabricationVSAvoidmoiré interference

Core Design Contradiction:

Ease of manufactureVSObject-affected harmful factors

Solution Approach 1:

The connection point pitch is defined as a specific ratio (0.3-0.7 times) of the pixel pitch rather than using fixed regular spacing. This parameter transformation maintains the simplicity of regular grid arrangement for manufacturing while avoiding the integer-multiple spacing that causes moiré interference with the pixel array.

Inventive Principle:

Principle #35Parameter changes

3Area of stationary object

If detection electrodes cover the entire display area, then detection coverage is maximized, but interference with display pixels increases

Engineering Contradiction:

Improvedetection coverage areaVSAvoidinterference with display pixels

Core Design Contradiction:

Area of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The detection electrode is segmented into multiple isolated conductive line fragments rather than forming a continuous pattern. These fragmented electrodes are distributed across the display area, maintaining broad detection coverage while the gaps between fragments reduce overall interference with display pixels.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Connection points between line fragments are strategically positioned at specific pitch ratios (0.3-0.7 times pixel pitch) rather than uniformly distributed. This local optimization allows the electrode pattern to maintain extensive coverage while minimizing interference through careful spatial positioning of conductive elements.

Inventive Principle:

Principle #3Local quality

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 arrangement effectively reduces moiré interference, maintaining optimal display quality and sensor functionality by aligning connection points to specific pitch ratios, ensuring uniform light transmission and accurate detection.

Implementation Method 1

there is a capacitive sensor which detects a contact or the like of an object based on a change in the capacitance between a detection electrode and a driving electrode facing each other with a dielectric interposed therebetween

Methodology Applied

Scientific EffectCapacitance: Capacitance

Implementation Method 2

the detection electrodes and the driving electrodes disposed in such a manner and the pixels contained in the display area may generate interference which will generate moiré

Methodology Applied

Scientific EffectMoiré effect: Moiré Effect

Data Source

PatentUS12585350B2Sensor device and sensor-equipped display device including detection electrode with connected line fragments

Publication Date: 2026.03.24 MAGNOLIA WHITE CORP

AI summary

A sensor-equipped display device is provided and includes a display panel and a detection electrode. The panel includes a display area in which pixels are arranged with a first pixel pitch in a first direction and a second pixel pitch in a second direction. The electrode includes an pattern having line fragments. The pattern has connection points at which ends of the fragments are connected to each other, and at least part of the connection points is arranged linearly such that an arrangement gaps thereof in the first and second direction is set to a first and second connection point pitch.