Curved Convex Portion for Electro-Optical Device Adhesion

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Solution Overview

Problem

In electro-optical devices with light-emitting elements, the bonding strength between the color filter and the sealing layer is weakened at low temperatures, leading to potential peeling issues during the manufacturing process.

Innovation Solution

Incorporating a convex portion with a curved surface between the sealing layer and the color filter layer, formed from the same photosensitive resin material, to enhance adhesion and increase the contact area, thereby strengthening the bonding between the color filter and the sealing layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If the color filter is formed at a low temperature to prevent deterioration of the light-emitting element, then the light-emitting element is protected from heat damage, but the bonding strength between the color filter and the sealing layer becomes weaker

Engineering Contradiction:

Improveheat damage to light-emitting elementVSAvoidbonding strength between color filter and sealing layer

Core Design Contradiction:

Object-affected harmful factorsVSStrength

Solution Approach 1:

The convex portion is formed with a curved surface instead of a flat surface. This curvature increases the contact area between the color filter layer and the convex portion, enhancing adhesion and preventing peeling while allowing low-temperature formation that protects the light-emitting element.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

A convex portion is added to create a three-dimensional structure on the sealing layer. This dimensional change increases the bonding interface area between the sealing layer and color filter layer, improving bonding strength without requiring high temperatures that would damage the light-emitting element.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

2Device complexity

If the color filter layer is formed to contact only the sealing layer, then the structure is simple, but the bonding strength is insufficient and peeling occurs

Engineering Contradiction:

Improvestructural simplicityVSAvoidbonding strength between color filter layer and sealing layer

Core Design Contradiction:

Device complexityVSStrength

Solution Approach 1:

The convex portion with its curved surface provides increased contact area between the color filter layer and the sealing layer, significantly enhancing bonding strength while maintaining relative structural simplicity.

Inventive Principle:

Principle #14Spheroidality (Curvature)

Solution Approach 2:

The convex portion is strategically positioned at specific locations where bonding reinforcement is needed. This localized approach strengthens the bonding interface without requiring complex structural changes across the entire device.

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

This configuration reduces the likelihood of color filter peeling from the sealing layer by enhancing adhesion and increasing the bonding strength, ensuring stable device performance and accurate color display.

Implementation Method 1

the area of the portion in contact with the color filter layer may be increased, and the bonding strength between the color filter layer and the sealing layer may be increased

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS10403687B2Electro-optical device, method for manufacturing electro-optical device, and electronic apparatus

Publication Date: 2019.09.03 LUMITEK DISPLAY TECH LTD

AI summary

There is provided an electro-optical device including a light-emitting element, a sealing layer that covers the light-emitting element, a color filter layer that is formed on the sealing layer, and a convex portion that is provided between the sealing layer and the color filter layer and has a first surface in contact with the sealing layer and a second surface in contact with the color filter layer, in which the second surface is a curved surface.