Organic Light-Emitting Display Frit Seal Reinforcement

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Solution Overview

Problem

Organic light-emitting display devices are prone to deterioration due to moisture and oxygen exposure, leading to incomplete sealing and potential cracks in the sealing material, which can compromise the hermeticity of the encapsulated space.

Innovation Solution

A frit seal is used between the front and rear substrates of the organic light-emitting display device, with a bracket and reinforcement material applied to enhance sealing and protect the organic light-emitting diodes from environmental factors, involving a method that includes applying a frit between the substrates, melting it using laser or infrared irradiation, and filling gaps with a curable reinforcement material.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a frit seal is used to seal the organic light-emitting display device, then the hermeticity is improved, but the sealing material may develop cracks and fail to provide complete sealing

Engineering Contradiction:

ImprovehermeticityVSAvoidsealing material integrity

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent uses a composite sealing structure combining frit seal with a reinforcing structure made of curable reinforcement material. The frit seal provides the primary hermetic barrier, while the reinforcing structure bonded to the frame provides mechanical strength and crack resistance, creating a composite sealing system that addresses both hermeticity and structural integrity requirements.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The sealing system is divided into two functional segments: the frit seal portion that provides hermetic sealing, and the reinforcing structure portion that provides mechanical strength. This segmentation allows each component to optimize its specific function without compromising the other, preventing the sealing material from developing cracks while maintaining hermeticity.

Inventive Principle:

Principle #1Segmentation

2Device complexity

If the organic light-emitting display device is sealed using conventional methods, then the structure is simple, but moisture and oxygen ingress causes deterioration

Engineering Contradiction:

Improvesealing structureVSAvoidmoisture and oxygen exposure

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent implements a composite sealing system with frit seal and reinforcing structure to create a robust barrier against moisture and oxygen. This composite approach provides superior protection compared to conventional single-material sealing methods, effectively preventing harmful environmental factors from reaching the organic light-emitting diodes despite the increased structural complexity.

Inventive Principle:

Principle #40Composite materials

3Reliability

If a reinforcing structure is added to the frit seal, then the sealing integrity is improved, but the device complexity increases

Engineering Contradiction:

Improvesealing integrityVSAvoidsealing structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The sealing system is segmented into distinct functional components: the frit seal for hermetic sealing and the reinforcing structure for mechanical strength. This segmentation allows for specialized optimization of each component while maintaining a clear division of functions, improving sealing integrity without unnecessarily complicating the overall device design.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The reinforcing structure serves multiple functions: it provides mechanical strength to prevent cracks, bonds to the frame for structural support, and works synergistically with the frit seal to enhance overall sealing integrity. This multi-functionality justifies the added complexity by delivering multiple benefits from a single structural addition.

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

The solution effectively prevents moisture and oxygen ingress, enhancing the hermeticity of the encapsulated space and protecting the organic light-emitting diodes, thereby extending the device's lifespan and improving image quality.

Implementation Method 1

melting it using laser or infrared irradiation

Methodology Applied

Scientific EffectLaser heating: Laser

Implementation Method 2

melting it using laser or infrared irradiation

Methodology Applied

Scientific EffectInfrared heating: Infrared Radiation

Implementation Method 3

filling gaps with a curable reinforcement material

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Data Source

PatentUS7944143B2Organic light-emitting display device with frit seal and reinforcing structure bonded to frame

Publication Date: 2011.05.17 MERITOR COMERCIO E INDA DE SISTEMAS AUTOMOTIVOS

AI summary

Disclosed is an organic light-emitting display device in which a substrate and an encapsulation substrate are joined by a frit and a reinforcing structure. The first substrate has a pixel region in which an organic light-emitting diode is formed, and a non-pixel region formed outside the pixel region. The second substrate is attached the first substrate by the frit. A bracket is joined with substrates by the reinforcing structure. A curable material is applied to inside the frame, moves between the first and second substrates, and then cured to form the reinforcing structure.