Tetragonal Partition Spacers for Light Modulation Devices

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Solution Overview

Problem

Light modulation devices face challenges in achieving excellent optical properties, particularly in controlling light leakage and haze in the black mode, due to the limitations of existing spacer configurations and arrangements.

Innovation Solution

The use of tetragonal partition spacers with specific angular relationships to the polymer film substrates and polarization layers effectively maintains cell gap and minimizes light leakage and haze in the black mode, enhancing optical characteristics through precise spacer design and arrangement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If honeycomb-shaped pillar pattern is applied to maintain cell gap, then mechanical support is improved, but light leakage increases in black mode

Engineering Contradiction:

Improvemechanical supportVSAvoidlight leakage

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The patent applies asymmetry by using tetragonal (square/rectangular) partition patterns instead of the conventional symmetric honeycomb-shaped pillar pattern. This asymmetric geometric change in the spacer arrangement modifies the optical path and reduces light leakage in black mode while maintaining mechanical support functionality.

Inventive Principle:

Principle #4Asymmetry

Solution Approach 2:

The patent applies local quality by optimizing the specific geometric parameters of the tetragonal partitions (such as partition width, spacing, and orientation relative to polarization layers) to achieve optimal performance. Different regions of the partition pattern are designed with specific dimensional characteristics to simultaneously satisfy mechanical support requirements and optical performance constraints.

Inventive Principle:

Principle #3Local quality

2Device complexity

If conventional spacer arrangement is used, then device simplicity is maintained, but optical properties (transmittance-variable characteristics and haze characteristics) are insufficient

Engineering Contradiction:

Improvedevice simplicityVSAvoidoptical properties

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent applies parameter changes by systematically optimizing key geometric parameters of the tetragonal partitions, including partition width, spacing between partitions, orientation angles relative to polarization layers, and height dimensions. These parameter optimizations enhance transmittance-variable characteristics and haze characteristics while maintaining relatively simple device structure.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs asymmetric tetragonal partition patterns instead of conventional symmetric arrangements, creating optimized optical paths that improve transmittance characteristics and reduce unwanted light scattering, thereby enhancing overall optical performance without significantly increasing device complexity.

Inventive Principle:

Principle #4Asymmetry

Data Source

PatentUS11733567B2Light modulation device

Publication Date: 2023.08.22 LG CHEM LTD

AI summary

A light modulation device is disclosed herein. The light modulation device can properly maintain a cell gap by controlling the shape and arrangement of spacers and the like, and is applicable for various applications by effectively controlling omnidirectional light leakage in a black mode, while having excellent optical properties, including transmittance-variable characteristics and haze characteristics, and the like.