Touch Sensor Display Routing Wire Electric Field Blocking

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Touch sensor integrated type display devices face issues with display defects due to electric field differences between routing wires and pixel electrodes, leading to mura defects and light leakage, which affect the accuracy of touch recognition and display quality.

Innovation Solution

The implementation of a touch sensor integrated type display device with a configuration of main and auxiliary routing wires that overlap all data lines corresponding to each touch/common electrode, blocking the electric field and preventing mura defects by ensuring uniform electric field distribution across the touch and common electrodes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If routing wires are used to connect touch/common electrodes, then electrical connection is achieved, but electric field differences cause mura defects and light leakage

Engineering Contradiction:

Improvetouch recognition accuracyVSAvoidmura defects and light leakage

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

An auxiliary routing wire is introduced as an intermediary element between the data line and the touch/common electrode. This auxiliary wire acts as a mediator that blocks the harmful electric field from the data line while still allowing the main routing wire to establish the necessary electrical connection for touch recognition

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The harmful electric field effect is extracted and separated from the functional electrical connection. By using the auxiliary routing wire to specifically block the electric field while the main routing wire maintains the electrical connection, the harmful effect is isolated without compromising the functional requirement

Inventive Principle:

Principle #2Taking out (Extraction)

2Ease of manufacture

If routing wires are positioned to connect touch/common electrodes, then electrical connectivity is established, but uniform electric field distribution is disrupted

Engineering Contradiction:

Improverouting wire connectionVSAvoidelectric field distribution uniformity

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The auxiliary routing wire serves as a mediator that restores electric field uniformity while the main routing wire maintains electrical connectivity. This intermediary element compensates for the disruption caused by the main routing wire's presence

Inventive Principle:

Principle #24Intermediary (Mediator)

3Device complexity

If simple routing wire configuration is used, then manufacturing is simplified, but display defects occur due to electric field interference

Engineering Contradiction:

Improverouting wire structureVSAvoiddisplay defects

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The auxiliary routing wire is introduced as a relatively simple intermediary element that blocks electric field interference without significantly increasing manufacturing complexity. It provides an effective solution to display defects with minimal additional structural complexity

Inventive Principle:

Principle #24Intermediary (Mediator)

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 configuration effectively prevents display defects such as mura phenomenon by ensuring the electric field between data lines and pixel electrodes does not affect the liquid crystal layer, thereby improving touch accuracy and display quality.

Implementation Method 1

a plurality of main routing wires, each of the plurality of main routing wires being connected to each of the plurality of touch/common electrode, and extended from the active area to one side of the bezel area; and at least one auxiliary routing wire configured to be connected to each of the plurality of touch/common electrodes in an area corresponding to the each touch/electrode, and to be in parallel with the plurality of main routing wires

Methodology Applied

Scientific EffectElectric field blocking: Electric Field

Data Source

PatentUS10120473B2Touch sensor integrated type display device

Publication Date: 2018.11.06 LG DISPLAY CO LTD

AI summary

Touch sensor integrated type display device improves display quality by preventing display defects due to electric field difference in pixels. The display device includes a plurality of gate lines and a plurality of data lines that cross each other, a plurality of combination touch and common electrodes, a plurality of main routing wires and a plurality of auxiliary routing wires. The plurality of combination touch and common electrodes have a same number of the plurality of main routing wires and the plurality of auxiliary routing wires that overlap each of the plurality of combination touch and common electrodes.