Display Panel Adhesive Composition for UV-Resistant Film Bonding

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Solution Overview

Problem

Adhesives used in organic electroluminescent display apparatuses are vulnerable to ultraviolet (UV) rays, leading to cracking and peeling of films due to exposure to sunlight, which limits the durability and integrity of the display.

Innovation Solution

Incorporating a UV absorber and/or light stabilizer into the adhesives used in the display apparatus to block UV rays and prevent damage, thereby maintaining adhesive integrity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If adhesive is used to attach films in the display apparatus, then the films can be securely bonded, but the adhesive is vulnerable to UV rays and develops cracks when exposed to sunlight

Engineering Contradiction:

Improveadhesive bonding strengthVSAvoidadhesive durability under UV exposure

Core Design Contradiction:

StrengthVSReliability

Solution Approach 1:

The patent applies this principle by incorporating UV absorbers and light stabilizers into the adhesive formulation. These additives convert the harmful UV radiation into harmless energy through absorption and stabilization mechanisms, transforming the UV exposure from a damaging factor into a controlled interaction that prevents degradation while maintaining bonding strength

Inventive Principle:

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

Solution Approach 2:

The patent modifies the chemical composition parameters of the adhesive by adding UV absorbers and light stabilizers. This changes the adhesive's properties to include UV resistance without compromising its bonding functionality, allowing it to maintain both strength and reliability under sunlight exposure

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If the adhesive is exposed to UV rays from sunlight, then the adhesive can bond the films, but cracks occur in the adhesive leading to film peeling

Engineering Contradiction:

Improvefilm assembly processVSAvoidadhesive structural integrity

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by pre-formulating the adhesive with UV absorbers and light stabilizers before application. This preparatory step ensures the adhesive is already protected against UV degradation, preventing crack formation and maintaining structural integrity throughout the service life of the display apparatus

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

By incorporating UV-absorbing compounds into the adhesive, the patent converts the harmful UV radiation into a controlled energy absorption process. This prevents the UV rays from degrading the adhesive polymer chains, thereby maintaining structural integrity while allowing the adhesive to perform its bonding function

Inventive Principle:

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

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

Prevents cracking and peeling of films by absorbing UV rays, ensuring the display apparatus maintains its structural integrity and functionality even when exposed to external light.

Implementation Method 1

the first adhesive includes a UV absorber and/or a light stabilizer

Methodology Applied

Scientific EffectUV absorption: Absorption (EM radiation)

Data Source

PatentUS12568755B2Display device having improved aperture ratio and resolution

Publication Date: 2026.03.03 LG DISPLAY CO LTD

AI summary

A display apparatus can include a display panel displaying an image, a polarizing plate on the display panel, a front member on the polarizing plate, a protective film on the front member, and a first adhesive between the front member and the protective film, wherein the first adhesive includes at least one of a UV absorber and a light stabilizer.