Display Input Sensing Island Pattern Static and Moiré

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Display devices with integrated input sensing panels face challenges in reliability due to issues such as static electricity damage and visibility impairments like the moiré phenomenon, which affect the sensitivity and visibility of the display.

Innovation Solution

A display device design featuring a display panel with first, second, and third light emitting areas, and an input sensing panel with specific sensing electrode patterns, island patterns, and connection patterns that prevent static electricity damage and maintain periodic characteristics to avoid the moiré phenomenon, ensuring improved reliability and visibility.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the input sensing panel is integrally formed with the display panel through successive processes, then manufacturing complexity is reduced, but reliability deteriorates due to static electricity damage risks

Engineering Contradiction:

Improvemanufacturing process complexityVSAvoidpanel reliability

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The input sensing panel is divided into multiple sensing patterns (first sensing patterns and second sensing patterns) that are spatially separated and independently arranged. This segmentation allows the sensing panel to maintain functional integrity while reducing the risk of catastrophic failure from static electricity damage, as damage to one sensing pattern does not necessarily affect others.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the sensing panel are designed with different local characteristics - the first sensing patterns are positioned to avoid overlapping with third light emitting areas, while the second sensing patterns are arranged with specific spacing. This local optimization ensures that sensitive sensing regions are protected from static electricity accumulation while maintaining overall panel functionality.

Inventive Principle:

Principle #3Local quality

2Measurement precision

If sensing patterns are densely arranged to improve sensing sensitivity, then sensing performance is improved, but the moiré phenomenon worsens due to periodic pattern interference

Engineering Contradiction:

Improvesensing sensitivityVSAvoidmoiré phenomenon

Core Design Contradiction:

Measurement precisionVSObject-affected harmful factors

Solution Approach 1:

The sensing patterns are designed with asymmetric spacing arrangements rather than uniform periodic patterns. The first sensing patterns and second sensing patterns are positioned at different locations with varying intervals, breaking the periodicity that causes moiré interference while maintaining adequate sensing coverage and sensitivity across the display panel surface.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The sensing patterns are arranged in multiple dimensions and layers - first sensing patterns in one arrangement and second sensing patterns in another arrangement. This multi-dimensional positioning reduces the likelihood of creating regular periodic patterns in any single dimension, thereby minimizing moiré phenomenon while preserving sensing capability.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Reliability

If connection patterns overlap with third light emitting areas to improve electrical connectivity, then electrical connection is improved, but visibility deteriorates due to light blocking

Engineering Contradiction:

Improveelectrical connectivityVSAvoiddisplay visibility

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The electrical connection is achieved through segmented routing - connection patterns are divided into multiple paths that navigate around the third light emitting areas. The first sensing patterns are connected through first connection patterns that are positioned in non-overlapping regions, ensuring both electrical connectivity and light transmission integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The design uses the spatial arrangement of sensing patterns and connection patterns as an intermediary solution. By positioning first sensing patterns and their connection patterns in regions that do not overlap with third light emitting areas, the patent creates an indirect routing path that maintains electrical connectivity without compromising display visibility.

Inventive Principle:

Principle #24Intermediary (Mediator)

Data Source

PatentUS11354001B2Display device including an input sensing panel having an island pattern

Publication Date: 2022.06.07 SAMSUNG DISPLAY CO LTD

AI summary

A display device includes a display panel including first light emitting areas, second light emitting areas, and third light emitting areas, and an input sensing panel disposed on the display panel and including a first sensing electrode and a second sensing electrode. The first sensing electrode includes first sensing patterns and at least one first connection pattern connecting two first sensing patterns adjacent to each other among the first sensing patterns. The second sensing electrode includes second sensing patterns, at least one island pattern disposed between two second sensing patterns adjacent to each other among the second sensing patterns, and second connection patterns connecting the second sensing patterns and the at least one island pattern. Each side of the at least one island pattern is substantially parallel to at least one side of each of the second sensing patterns.