Liquid Crystal Display Wall Partitioning Sealant Impurities

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Solution Overview

Problem

In liquid crystal display panels, the dissolution of sealant materials into the liquid crystal during the manufacturing process leads to impurity contamination, causing black spots and deteriorating display quality, especially when using the dropping method, and it is challenging to achieve a narrow frame structure while preventing sealant dissolution.

Innovation Solution

A liquid crystal display device design that includes a wall partitioning the liquid crystal into separate regions between the sealant and the display area, with a gap between the wall and the second substrate, allowing for efficient containment of impurities and enabling a narrower frame by minimizing contact time between the liquid crystal and uncured sealant.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If liquid crystal is dropped onto substrate before sealant curing, then liquid crystal injection efficiency is improved, but sealant dissolves into liquid crystal causing impurity contamination

Engineering Contradiction:

Improveliquid crystal injection efficiencyVSAvoidsealant dissolution into liquid crystal

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The invention divides the space between substrates into two distinct regions: a display region where liquid crystal is filled, and a sealant region where uncured sealant is placed. This spatial segmentation prevents direct contact between liquid crystal and uncured sealant, eliminating dissolution while maintaining the efficiency of pre-curing liquid crystal filling.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The invention introduces a partition structure as an intermediary element between the liquid crystal and uncured sealant. This partition acts as a physical barrier that mediates the interaction between the two materials, preventing harmful dissolution while allowing both to coexist in the same device space.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If two-layer sealant structure is used to prevent sealant dissolution, then impurity contamination is reduced, but frame width increases

Engineering Contradiction:

Improveimpurity contamination in liquid crystalVSAvoidframe width

Core Design Contradiction:

Object-affected harmful factorsVSLength of stationary object

Solution Approach 1:

Instead of preventing sealant dissolution by adding more layers in the vertical dimension (which would increase frame width), the invention switches to a horizontal dimension solution by using a partition structure to separate regions. This dimensional shift achieves the same protective function without increasing overall device thickness or frame width.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

3Productivity

If liquid crystal contact time with uncured sealant is extended, then filling efficiency improves, but sealant dissolution increases

Engineering Contradiction:

Improveliquid crystal filling efficiencyVSAvoiddisplay quality

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

By segmenting the space into display region and sealant region with a partition, the invention allows liquid crystal to fill the display region efficiently for extended periods without increasing dissolution, because the partition maintains spatial separation throughout the entire filling process.

Inventive Principle:

Principle #1Segmentation

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 design effectively reduces impurity contamination in the display region, preventing black spots and allowing for a narrower frame structure by minimizing the dissolution of sealant components into the liquid crystal, thereby enhancing display quality and manufacturing efficiency.

Implementation Method 1

a wall that partitions the liquid crystal into a portion on the display region side and a portion on the sealant side

Methodology Applied

Scientific EffectPhysical containment: Physical Containment

Implementation Method 2

a gap in which the liquid crystal can exist is provided between a tip of the wall and the second substrate side

Methodology Applied

Scientific EffectCapillary action: Capillary Action

Data Source

PatentUS10054823B2Liquid crystal display device

Publication Date: 2018.08.21 MAGNOLIA WHITE CORP

AI summary

A liquid crystal display includes a first substrate and a second substrate bonded to each other at their periphery by a sealant, with liquid crystal sealed between the first substrate and a second substrate, and has a display region. The first substrate is formed, between the sealant and an end portion of the display region, with a wall that partitions the liquid crystal into a portion on the display region side and a portion on the sealant side. A gap exists between the tip of the wall and the second substrate side. In the liquid crystal display device, a liquid crystal portion that has been contaminated is restrained from moving into the display region.