Curved EL Panel Protective Film for Moisture-Resistant Sealing

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Solution Overview

Problem

Light-emitting devices with electroluminescence (EL) elements are prone to deterioration due to external contaminants like moisture, which reduces their reliability and functionality, especially when they have complex shapes required for various applications.

Innovation Solution

A manufacturing method for light-emitting devices involves forming a light-emitting panel with a protective film that is processed into a curved shape, using flexible sealing members and a supporting member to prevent damage and contamination, allowing for the creation of reliable and versatile devices with various shapes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the light-emitting panel is processed into a curved shape after electrode and element layers are formed, then the device can achieve various complex shapes for different applications, but the protective film may be damaged during shape processing

Engineering Contradiction:

Improveshape varietyVSAvoidprotective film integrity

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The protective film is formed on the light-emitting panel before the panel is processed into its final curved shape. This preliminary formation of the protective film prevents damage during subsequent shape processing operations, as the film is already in place to protect the electrode and element layers from contamination and mechanical damage during bending and forming operations

Inventive Principle:

Principle #10Preliminary action

2Reliability

If the protective film is formed before shape processing, then the electrode and element layers are protected from contamination, but the protective film may suffer from shape defects during processing

Engineering Contradiction:

Improvecontamination preventionVSAvoidprotective film quality

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The protective film is formed in advance on the planar light-emitting panel before shape processing. This preliminary action allows the film to be properly deposited and cured on a flat surface, ensuring high film quality and proper adhesion. The film then protects the underlying layers during the subsequent shape processing operations, preventing contamination while the processing is performed

Inventive Principle:

Principle #10Preliminary action

3Adaptability or versatility

If the light-emitting device uses flexible sealing members and curved shapes, then the device can be applied to various locations and purposes, but moisture and impurities may still enter and cause deterioration

Engineering Contradiction:

Improveapplication rangeVSAvoidmoisture contamination

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Flexible sealing members are used to seal the light-emitting device, creating a protective barrier that prevents moisture and impurities from entering the device interior. These flexible sealing members can accommodate curved shapes and various device configurations while maintaining effective sealing, thus preventing contamination across different application scenarios

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The light-emitting device is filled with an inert gas atmosphere (such as nitrogen or rare gases) to displace moisture and oxygen. This creates a protective environment that prevents deterioration of the electroluminescence elements from the inside, working in conjunction with the external flexible sealing members to provide comprehensive protection against moisture and impurities

Inventive Principle:

Principle #39Inert atmosphere (Inert environment)

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 method enhances the reliability and functionality of light-emitting devices by preventing shape defects and contamination, ensuring a dense protective film blocks moisture and impurities, thus maintaining the device's performance across different applications.

Implementation Method 1

the protective film which is a dense film blocks moisture or other impurities from the outside, and contamination of a light-emitting device can be efficiently prevented

Methodology Applied

Scientific EffectPhysical barrier (protective film):

Implementation Method 2

a light-emitting device having a light-emitting element (hereinafter also referred to as an EL element) exhibiting electroluminescence (hereinafter also referred to as EL)

Methodology Applied

Scientific EffectElectroluminescence: Electroluminescence

Data Source

PatentUS12004369B2Light-emitting device

Publication Date: 2024.06.04 SEMICON ENERGY LAB CO LTD

AI summary

An object of one embodiment of the present invention is to provide a more convenient highly reliable light-emitting device which can be used for a variety of applications. Another object of one embodiment of the present invention is to manufacture, without complicating the process, a highly reliable light-emitting device having a shape suitable for its intended purpose. In a manufacturing process of a light-emitting device, a light-emitting panel is manufactured which is at least partly curved by processing the shape to be molded after the manufacture of an electrode layer and/or an element layer, and a protective film covering a surface of the light-emitting panel which is at least partly curved is formed, so that a light-emitting device using the light-emitting panel has a more useful function and higher reliability.