Liquid Crystal Assembly Production for Curved Displays

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Solution Overview

Problem

Existing methods for producing liquid crystal (LC) assemblies that are later stretched to create curved profiles often result in optical defects in the active region due to inadequate resistance to stretching processes.

Innovation Solution

A method involving the production of LC assemblies with a determined amount of liquid crystal material, laterally bounded by a barrier, where the amount of LC material is based on parameters of the stretching process, such as changes in area or spacer dimensions, to minimize optical defects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the amount of liquid crystal material is not optimized before stretching, then the assembly can be produced simply, but optical defects occur in the active region after stretching

Engineering Contradiction:

Improveresistance to optical defectsVSAvoidcomplexity of material quantity determination

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent applies preliminary action by determining and optimizing the amount of liquid crystal material to be placed in the assembly before the stretching process occurs. This preliminary determination of LC material quantity, based on parameters like area change and spacer dimensions, prevents optical defects from arising during the subsequent stretching operation, rather than attempting to correct defects after they occur.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs parameter changes by adjusting the quantity of liquid crystal material as a controllable parameter in the assembly production process. By varying the LC material amount based on stretching process parameters (such as expected area expansion or spacer compression), the system optimizes the assembly's resistance to optical defects while maintaining manufacturing simplicity.

Inventive Principle:

Principle #35Parameter changes

2Manufacturing precision

If the LC material amount is determined based on stretching parameters, then optical defects are reduced, but the manufacturing process becomes more complex

Engineering Contradiction:

Improveprecision of LC material quantityVSAvoidease of assembly production

Core Design Contradiction:

Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The patent uses parameter changes to establish a direct relationship between stretching process parameters (such as area change percentage or spacer dimension modifications) and the required liquid crystal material quantity. This allows manufacturers to determine LC material amounts systematically based on measurable process parameters, achieving manufacturing precision without requiring complex manual adjustments or trial-and-error approaches.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If spacers are used to define liquid crystal material regions, then the assembly structure is simplified, but the stretching process causes compression that may create optical defects

Engineering Contradiction:

Improvesimplicity of assembly structureVSAvoidcompression-induced optical defects

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary action by accounting for the compression effect of spacers during the stretching process in advance. The liquid crystal material quantity is determined beforehand based on parameters including the expected compression of spacer dimensions, allowing the system to compensate for the harmful compression effect before it occurs during manufacturing.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent converts the harmful compression effect of spacers during stretching into a beneficial design consideration. By incorporating the compression factor into the preliminary determination of liquid crystal material quantity, the system transforms the potential defect source into a controlled parameter, ensuring that the compression effect is accounted for and optimized rather than merely mitigated.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 effectively reduces the occurrence of optical defects in LC assemblies by optimizing the amount of LC material and spacer configurations in response to the stretching process, ensuring better resistance to curvature changes.

Implementation Method 1

heating the assembly to a molding temperature above a glass transition temperature of one or more support films of the assembly

Methodology Applied

Scientific EffectGlass transition:

Implementation Method 2

the assembly comprises an amount of liquid crystal material in a region laterally bounded by a lateral barrier

Methodology Applied

Scientific EffectLiquid crystal phase behavior: Liquid Crystals

Data Source

PatentUS12339545B2Producing liquid crystal assemblies

Publication Date: 2025.06.24 FLEXENABLE TECH LTD

AI summary

A technique, comprising: producing an assembly in preparation for a later process of permanently stretching one or more parts of the assembly; wherein the assembly comprises an amount of liquid crystal material in a region laterally bounded by a lateral barrier; and wherein producing the assembly comprises determining the amount of LC material, based at least partly on one or more parameters of the later stretching process.