Display Medium Laminate for Wavelength-Selective Drawing

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Solution Overview

Problem

Existing display media using laser marking sheets and full-color laser drawing sheets face issues with unintended drawing due to identical laser beam conditions, preventing intended drawing from being performed.

Innovation Solution

A display medium with a first recording layer capable of recording with a first laser beam and a second recording layer capable of recording with a second laser beam, employing different recording methods to allow for independent drawing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If identical laser beam conditions are used for both laser marking sheet and full-color laser drawing sheet, then the drawing process is simplified, but unintended drawing occurs on both sheets

Engineering Contradiction:

Improvelaser beam condition uniformityVSAvoiddrawing accuracy

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The laminate is divided into multiple recording layers (first recording layer and second recording layer), each with distinct laser beam response characteristics. This segmentation allows selective activation of specific layers through wavelength differentiation, preventing unintended drawing on non-target layers while maintaining operational simplicity.

Inventive Principle:

Principle #1Segmentation

2Reliability

If different recording methods are employed for first and second recording layers, then intended drawing is achieved, but device complexity increases

Engineering Contradiction:

Improvedrawing accuracyVSAvoidrecording layer structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Each recording layer is designed with localized functional characteristics - the first recording layer contains a first photothermal conversion agent responsive to a first peak wavelength, while the second recording layer contains a second photothermal conversion agent responsive to a second peak wavelength. This local quality differentiation enables selective recording on specific layers without requiring complex external control systems.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The laminate employs composite material structure combining multiple recording layers with different photothermal conversion agents. Each layer uses materials specifically selected to respond to different laser wavelengths, creating a multi-functional composite that achieves both drawing accuracy and color stability while maintaining structural integration.

Inventive Principle:

Principle #40Composite materials

3Adaptability or versatility

If multiple recording layers with different peak wavelengths are used, then independent drawing on each layer is enabled, but manufacturing complexity increases

Engineering Contradiction:

Improvelayer independenceVSAvoidlaminate production

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The multiple recording layers are nested within a single laminate structure, with each layer containing its specific photothermal conversion agent. This nesting approach allows independent functionality of each layer (different peak wavelength responses) while maintaining a unified, integrated product that simplifies manufacturing and handling compared to separate components.

Inventive Principle:

Principle #7Nested doll (Nesting)

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

Enables intended drawing by allowing independent recording on each layer, facilitating full-color image creation with improved tamper-proofing and color stability.

Implementation Method 1

a first photothermal conversion agent and a first matrix resin. The first recording layer is capable of performing recording with a first laser beam having a first peak wavelength

Methodology Applied

Scientific EffectPhotothermal conversion: Absorption (EM radiation)

Implementation Method 2

a second photothermal conversion agent and a second matrix resin. The second recording layer is capable of performing recording with a second laser beam having a second peak wavelength

Methodology Applied

Scientific EffectPhotothermal conversion: Absorption (EM radiation)

Data Source

PatentUS20250334925A1Display medium and laminate

Publication Date: 2025.10.30 SONY GROUP CORP

AI summary

Provided is a display medium configured to allow for intended drawing. The display medium includes a first recording layer capable of performing recording with a first laser beam having a first peak wavelength and a second recording layer capable of performing recording with a second laser beam having a second peak wavelength. The first recording layer and the second recording layer employ different recording methods.