Polymer Dispersed Liquid Crystal Device Cooling Plate UV Curing

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Solution Overview

Problem

The polymer dispersed liquid crystal devices require high driving voltages, leading to increased electrical inefficiency, battery consumption, and manufacturing costs, while also posing safety risks due to the high voltage used in electronic eyeglasses.

Innovation Solution

A method involving the use of a cooling plate during the UV light irradiation process in the production of polymer dispersed liquid crystal devices to effectively remove heat, thereby reducing the driving voltage without compromising other electro-optical characteristics.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If UV light irradiation is applied to cure the polymer dispersed liquid crystal, then the device is formed and functional, but heat is generated that increases driving voltage and reduces efficiency

Engineering Contradiction:

Improvedevice formationVSAvoiddriving voltage

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent converts the harmful heat generated during UV curing into a beneficial process parameter by controlling the temperature profile during polymerization. The heat that would normally increase driving voltage is instead used to accelerate the polymerization reaction rate, improving device formation efficiency while maintaining optimal electro-optical properties.

Inventive Principle:

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

Solution Approach 2:

The patent changes the temperature parameter during the UV curing process to optimize both device formation and subsequent performance. By controlling temperature within a specific range during polymerization, the patent achieves complete curing while preventing excessive heat that would lead to high driving voltages and reduced efficiency.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If high driving voltage is used in polymer dispersed liquid crystal devices, then the device operates, but electrical efficiency decreases and battery consumption increases

Engineering Contradiction:

Improvedevice operationVSAvoidelectrical efficiency

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

The patent optimizes the polymerization temperature parameter to control the molecular weight and cross-linking density of the polymer matrix. This results in a more efficient liquid crystal-polymer interface, reducing the voltage required to reorient liquid crystal molecules and improve electrical efficiency during operation.

Inventive Principle:

Principle #35Parameter changes

3Ease of operation

If high driving voltage is used in polymer dispersed liquid crystal devices, then the device operates, but manufacturing cost increases

Engineering Contradiction:

Improvedevice operationVSAvoidmanufacturing cost

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The patent changes the UV irradiation temperature parameter to optimize polymerization efficiency, resulting in devices with lower driving voltage requirements. This reduces the cost of driving circuits and makes the device more manufacturable and commercially viable.

Inventive Principle:

Principle #35Parameter changes

4Ease of operation

If high driving voltage is used in polymer dispersed liquid crystal devices, then the device operates, but safety risks increase

Engineering Contradiction:

Improvedevice operationVSAvoidsafety risks

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The patent optimizes the polymerization temperature parameter to create a polymer matrix with superior electro-optical properties, resulting in significantly reduced driving voltage requirements. This enhances user safety by minimizing electrical hazards while maintaining full operational functionality of the device.

Inventive Principle:

Principle #35Parameter changes

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 approach decreases the driving voltage, improves reaction rate, increases contrast ratio, and reduces manufacturing costs by lowering power consumption and the cost of the driving circuit.

Implementation Method 1

a method involving the use of a cooling plate during the UV light irradiation process in the production of polymer dispersed liquid crystal devices to effectively remove heat

Methodology Applied

Scientific EffectHeat removal: Cooling

Implementation Method 2

curing with UV light

Methodology Applied

Scientific EffectUV curing: Photopolymerisation

Data Source

PatentUS9028290B2Method of producing polymer dispersed liquid crystal device using cooling plate

Publication Date: 2015.05.12 DONGGUK UNIVERSITY INDUSTRY ACADEMIC COOPERATION FOUNDATION

AI summary

Provided are a method of producing a polymer dispersed liquid crystal device with a cooling plate and a polymer dispersed liquid crystal device using the same. According to the producing method of the invention using the cooling plate capable of effectively removing heat with a simple method, it is possible to improve driving voltage characteristics and decrease a production cost of the polymer dispersed liquid crystal device.