Integrated Touch Screen Light-Emitting Display With Reflective Dam Metal

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Solution Overview

Problem

High-energy UV rays used in curing the outer periphery of display devices react with organic films on light-emitting elements, causing outgassing and affecting the lifespan of the elements.

Innovation Solution

Incorporating reflective metals on dams surrounding the display area to reflect high-energy UV rays away from the light-emitting elements, thereby reducing their degradation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If high-energy UV rays are used to cure the outer periphery of the display device, then the curing process is effective, but the UV rays react with organic films on light-emitting elements causing outgassing and degradation

Engineering Contradiction:

Improvecuring processVSAvoidlifespan of light-emitting element

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent applies a UV-shielding layer on the outer periphery that converts the harmful UV radiation into a beneficial protective barrier. This layer blocks the UV rays from reaching the organic films in the active area while still allowing the curing process to be completed effectively, thus transforming the harmful UV effect into a protective mechanism that extends the lifespan of the light-emitting elements.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent introduces a UV-shielding layer as an intermediary between the UV source and the organic films. This intermediary layer absorbs or blocks the UV rays before they can react with the organic materials, thereby protecting the light-emitting elements from degradation while maintaining the effectiveness of the curing process.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Adaptability or versatility

If touch electrodes are disposed on the encapsulation layer, then touch sensing function is achieved, but the arrangement may increase susceptibility to UV ray damage

Engineering Contradiction:

Improvetouch sensing functionVSAvoidUV ray damage

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent positions the UV-shielding layer specifically on the outer periphery where it can block UV rays from reaching the touch electrodes and encapsulation layer. This converts the potential harm of UV exposure into a protective effect, allowing the touch sensing function to operate without the risk of UV-induced degradation.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Solution Approach 2:

The patent applies the UV-shielding layer locally on the outer periphery rather than uniformly across the entire device. This localized application provides targeted protection to the areas most susceptible to UV damage while maintaining the functionality of the touch electrodes and encapsulation layer in the active area.

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

The reflective metals effectively suppress the degradation of light-emitting elements by redirecting harmful UV rays, enhancing the longevity and performance of the display device.

Implementation Method 1

a reflective metal disposed on at least one of the one or more dams... configured to reflect high-energy UV rays to the outside

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS20250331389A1Touch screen integrated light-emitting display device

Publication Date: 2025.10.23 LG DISPLAY CO LTD

AI summary

A light-emitting display device according to an embodiment of the present specification may include a substrate including a display area and a non-display area, one or more dams disposed in the non-display area and configured to surround the display area, and a reflective metal disposed on at least one of the one or more dams.