Liquid Crystal Partition Wall Seal Guide Design

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Solution Overview

Problem

The existing liquid crystal device manufacturing methods, such as the vacuum injection and dripping injection methods, face issues with contamination of liquid crystals due to uncured seal material, leading to display unevenness and alignment abnormalities, as resin or additive components from the seal material elute over time, especially when the seal material overhangs into the liquid crystal injection area.

Innovation Solution

The implementation of a liquid crystal device design featuring a first and second partition wall with a connection portion on the first substrate, forming a groove portion for the seal material, which reduces the amount of seal material that overhangs and contacts the liquid crystal, using photo curing resin, thermosetting resin, or photo-thermosetting resin, and incorporating light absorption agents or pigments to prevent light-induced deterioration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If the seal material is applied in the conventional dripping injection method, then the substrates can be adhered, but the seal material overhangs to the liquid crystal injection side and causes contamination

Engineering Contradiction:

Improveadhesion strengthVSAvoidliquid crystal contamination

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The seal guide is divided into multiple partition walls (first partition wall, second partition wall, third partition wall) that segment the seal material application area. This segmentation creates distinct zones that prevent the seal material from overhanging into the liquid crystal injection area while maintaining effective adhesion between substrates.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the seal guide are given different heights and functions. The first partition wall has a specific height to contain seal material, the second partition wall provides additional containment, and the third partition wall prevents overhang. This local differentiation of properties allows the seal material to adhere effectively without contaminating the liquid crystal.

Inventive Principle:

Principle #3Local quality

2Strength

If the seal material is applied to ensure complete coverage, then adhesion is improved, but the amount of seal material increases and causes more overhang

Engineering Contradiction:

Improveadhesion strengthVSAvoidseal material amount

Core Design Contradiction:

StrengthVSQuantity of substance

Solution Approach 1:

The seal guide structure is extended into the thickness dimension with multiple partition walls at different positions. This three-dimensional structure allows the seal material to be contained and distributed more efficiently, providing complete coverage for adhesion without excessive quantity that would cause overhang and contamination.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If the seal material is cured insufficiently, then the manufacturing process is faster, but resin or additive components elute over time causing contamination

Engineering Contradiction:

Improvecuring speedVSAvoidlong-term stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The seal material is applied in a controlled manner within the multi-partition seal guide structure before curing. This preliminary controlled application ensures proper distribution and containment, allowing for efficient curing without subsequent elution of components. The structure prevents contamination even if curing is not perfectly complete, providing a buffer against long-term stability issues.

Inventive Principle:

Principle #10Preliminary action

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 significantly reduces the elution of resin or additive components from the seal material, preventing display unevenness and alignment abnormalities, while allowing for improved adhesion strength and reduced seal material usage, thereby enhancing the overall quality of the liquid crystal device.

Implementation Method 1

using photo curing resin, thermosetting resin, or photo-thermosetting resin

Methodology Applied

Scientific EffectPhoto curing: Photopolymerisation

Implementation Method 2

using photo curing resin, thermosetting resin, or photo-thermosetting resin

Methodology Applied

Scientific EffectThermosetting:

Implementation Method 3

incorporating light absorption agents or pigments to prevent light-induced deterioration

Methodology Applied

Scientific EffectLight absorption: Absorption (EM radiation)

Data Source

PatentUS7952680B2Liquid crystal device and electronic apparatus

Publication Date: 2011.05.31 BOE TECHNOLOGY GROUP CO LTD

AI summary

A liquid crystal device including: a first partition wall which is disposed on the first substrate at the second substrate side, is adjacent to the liquid crystal at one wall surface, is adjacent to the seal material at the other wall surface, and is disposed along the outer circumference of the display region; a second partition wall which is disposed on the first substrate at the second substrate side, has a wall surface facing the wall surface of the first partition wall adjacent to the seal material, and is disposed along the outer circumference of the first partition wall; and a connection portion which is disposed on the first substrate at the second substrate side with a height lower than that of the first partition wall and the second partition wall, and is disposed so as to connect the wall surface of the first partition wall adjacent to the seal material and the wall surface of the second partition wall facing the wall surface.