Autostereoscopic Display Moisture Management

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Solution Overview

Problem

Stereoscopic display devices using liquid crystal lens cells face issues with moisture elution from the liquid crystal layer when temperature drops, leading to defects in high humidity environments.

Innovation Solution

Incorporating a water-absorption film made of acrylic or epoxy resin between or on the substrates of the liquid crystal lens cell, along with specific electrode configurations and bead spacers, to manage moisture absorption and prevent elution.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a liquid crystal lens cell with minimal components (transparent conductive film, bead spacers, oriented insulating film) is used, then device complexity is reduced, but moisture absorption increases in high temperature and humidity environments

Engineering Contradiction:

Improvenumber of membersVSAvoidmoisture absorption

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent applies local quality by adding a water-absorption film specifically at the electrode regions where moisture accumulation is most problematic. This localized approach addresses the moisture absorption issue without requiring a complete redesign of the entire liquid crystal lens cell structure, thus maintaining simplicity while improving moisture resistance at critical locations.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The patent employs composite materials by combining the traditional liquid crystal lens cell components (transparent conductive film, bead spacers, insulating film) with an additional water-absorption film layer. This composite structure integrates moisture absorption functionality into the existing minimal-component design, resolving the contradiction between simplicity and moisture resistance.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If the liquid crystal lens cell operates in high temperature and humidity environments, then adaptability to environmental conditions is improved, but moisture elution from the liquid crystal layer occurs when temperature is lowered

Engineering Contradiction:

Improveenvironmental condition toleranceVSAvoidmoisture elution prevention

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent applies preliminary action by having the water-absorption film absorb and store excess moisture during high temperature and humidity operation before moisture elution can occur. When temperature drops and the liquid crystal layer would normally elute moisture, the water-absorption film releases the pre-absorbed moisture back, preventing defects and maintaining reliability across temperature cycles.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent converts the harmful effect of moisture absorption into a beneficial function. The water-absorption film, which initially seems to add complexity, actually prevents moisture elution by acting as a moisture reservoir. The film absorbs moisture when it would be harmful (high temperature/humidity) and releases it when needed (temperature drop), transforming a potential problem into a protective mechanism.

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

Prevents moisture elution from the liquid crystal layer, ensuring stable operation in varying environmental conditions and reducing crosstalk for clear 3D image observation.

Implementation Method 1

the liquid crystal lens cell has a water-absorption film arranged on at least one of the first substrate and the second substrate on the side of the liquid crystal layer

Methodology Applied

Scientific EffectAbsorption: Absorption (physical)

Data Source

PatentUS10288947B2Autostereoscopic display device

Publication Date: 2019.05.14 MAGNOLIA WHITE CORP

AI summary

The present invention provides an autostereoscopic display device including: a display device; and a liquid crystal lens cell arranged on the display device, the liquid crystal lens cell including: a first substrate; a second substrate; a liquid crystal layer sandwiched between the first substrate and the second substrate; a first electrode arranged on the first substrate on the side of the liquid crystal layer; and a second electrode arranged on the second substrate on the side of the liquid crystal layer, in which the liquid crystal lens cell has a water-absorption layer arranged on at least one of the first substrate and the second substrate on the side of the liquid crystal layer.