Optical Laminate Polarization Concealment for Authenticity

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

The existing optical layered bodies with cholesteric regularity have low concealability of layers when observed from opposite surfaces, which can reduce their authenticity identification capability.

Innovation Solution

An optical layered body comprising a polarized light separation layer and a first display layer, where the polarized light separation layer is a linear polarizer, the first display layer is also a linear polarizer, they overlap partially, and the average degree of polarization of the polarized light separation layer is within a specific range to enhance concealability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an optical layered body with cholesteric regularity is used to provide identification capability, then authenticity identification capability is improved, but concealability of layers on opposite surfaces deteriorates

Engineering Contradiction:

Improveauthenticity identification capabilityVSAvoidconcealability of layers

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent divides the optical layered body into multiple functional layers: a first layer with cholesteric regularity for authenticity identification and a second layer with different regularity for concealability. This segmentation allows each layer to perform its specific function independently, resolving the contradiction between identification capability and concealability.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the optical layered body are given different optical properties through varying cholesteric regularity. The first layer has cholesteric regularity optimized for reflection and identification, while the second layer has different regularity optimized for transmission and concealability, allowing localized optimization of functions.

Inventive Principle:

Principle #3Local quality

2Device complexity

If a single layer with cholesteric regularity is used for authenticity identification, then device complexity is reduced, but concealability of opposite surface layers deteriorates

Engineering Contradiction:

Improvestructure simplicityVSAvoidconcealability of layers

Core Design Contradiction:

Device complexityVSObject-affected harmful factors

Solution Approach 1:

The patent segments the single functional layer into multiple layers with different cholesteric regularities. The first layer handles authenticity identification while the second layer provides concealability, maintaining relative structural simplicity while resolving the functional contradiction.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The optical layered body achieves multi-functionality by combining layers with different cholesteric regularities - one layer provides authenticity identification through selective light reflection while another layer provides concealability through different optical properties, allowing a single device to perform multiple functions.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 proposed optical layered body achieves excellent concealability of layers on opposite surfaces, thereby enhancing its authenticity identification capability.

Implementation Method 1

the polarized light separation layer is a linear polarizer including one of an absorptive linear polarizer and a reflective linear polarizer

Methodology Applied

Scientific EffectPolarization: Polarisation

Implementation Method 2

the polarized light separation layer is a linear polarizer including one of an absorptive linear polarizer and a reflective linear polarizer

Methodology Applied

Scientific EffectAbsorption (EM radiation): Absorption (EM radiation)

Implementation Method 3

the polarized light separation layer is a linear polarizer including one of an absorptive linear polarizer and a reflective linear polarizer

Methodology Applied

Scientific EffectReflection: Reflection

Data Source

PatentUS12242093B2Optical laminate and method for determining authenticity thereof, and article

Publication Date: 2025.03.04 ZEON CORP

AI summary

An optical layered body comprising a polarized light separation layer and a first display layer, wherein: the polarized light separation layer is a linear polarizer including one of an absorptive linear polarizer and a reflective linear polarizer; the first display layer is a linear polarizer including the other of the absorptive linear polarizer and the reflective linear polarizer; the first display layer overlaps with a part of the polarized light separation layer; and an average degree of polarization of the polarized light separation layer at a wavelength of 400 nm to 680 nm is 0.60 or more.