Display Pad Connection Structure for Stable Touch Film Discharge

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Solution Overview

Problem

Existing display devices with built-in touch sensors face challenges in maintaining display quality due to electric charge buildup and reliability issues, particularly in the connection between the first and second substrates.

Innovation Solution

A display device configuration that includes a first substrate with a pad portion and a second substrate with a transparent conductive film, where a connection member electrically connects the pad portion and the transparent conductive film, enhancing the electrical connection and reducing the risk of charge buildup.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a connection member electrically connects the pad portion and the transparent conductive film, then electrical connection stability is improved, but device complexity increases

Engineering Contradiction:

Improveelectrical connection stabilityVSAvoidconnection structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The connection member is embedded within the sealing structure, nesting the electrical connection function within the existing sealing framework. This integration avoids adding separate external connection components, thereby improving electrical connection stability while minimizing increases in device complexity.

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The connection member acts as an intermediary element between the pad portion and the transparent conductive film, providing a dedicated electrical pathway. This mediator ensures stable electrical connection while the embedding within sealing structure keeps the overall device complexity manageable.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If the transparent conductive film is positioned on the outer surface of the second substrate, then touch sensing capability is improved, but the film is susceptible to breakage

Engineering Contradiction:

Improvetouch sensing capabilityVSAvoidfilm durability

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The sealing structure is designed to embed and protect the transparent conductive film before any potential damage can occur. This preventive protection cushioning ensures the film maintains its touch sensing capability while being shielded from mechanical stress and breakage risks.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The transparent conductive film is integrated within a flexible sealing structure that can accommodate mechanical stresses. This configuration allows the film to maintain its position for touch sensing while the surrounding sealing structure provides mechanical protection against breakage.

Inventive Principle:

Principle #30Flexible shells and thin films

3Reliability

If multiple metal layers and insulating films are used in the pad portion, then electrical connection reliability is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveelectrical connection reliabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The pad portion structure with multiple metal layers and insulating films is merged with the sealing structure fabrication process. By combining these functions into a unified manufacturing approach, electrical connection reliability is improved through multi-layer construction while manufacturing complexity is reduced through process integration.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The sealing structure serves multiple functions: it provides mechanical sealing and simultaneously houses the complex multi-layer pad portion electrical connection structure. This multi-functionality allows reliable electrical connections to be achieved without proportionally increasing manufacturing complexity, as the same structural elements fulfill multiple purposes.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 suppresses reliability degradation and display quality issues by ensuring stable electrical discharge and preventing breakage of the transparent conductive layer, thereby maintaining optimal display performance.

Implementation Method 1

a connection member electrically connects the pad portion and the transparent conductive film

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS20250044652A1Display device

Publication Date: 2025.02.06 MAGNOLIA WHITE CORP

AI summary

According to one embodiment, a display device includes a first substrate, a second substrate, and a connection member. The first substrate includes a pad portion. The second substrate includes a transparent conductive film located on an outer surface. The connection member electrically connects the pad portion and the transparent conductive film. The pad portion includes a second metal layer, a first organic insulating film having a first through hole penetrating to the second metal layer, a third metal layer being in contact with the second metal layer in the first through hole, and a second organic insulating film covering an end portion of the third metal layer and having a second through hole penetrating to the third metal layer.