Composite Glass Viewing Angle Color Shift via Intermediate Foil

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Solution Overview

Problem

The manufacturing of composite glass is costly and labor-intensive, and existing solutions do not effectively utilize viewing angle-dependent effects for aesthetic versatility without increasing production costs.

Innovation Solution

A composite glass design featuring an intermediate foil with relief structures, interference layers, or pigments that change appearance based on the viewing angle, allowing for customizable motifs and color shifts without requiring additional substances or recertification, achieved by adjusting parameters of the foil's relief structure, interference layer construction, or pigment layer.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If intermediate foil pieces are coated and processed to achieve viewing angle-dependent effects, then aesthetic versatility is improved, but manufacturing complexity and costs increase

Engineering Contradiction:
Improveaesthetic versatilityVSAvoidmanufacturing complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent applies parameter changes by modifying the physical and chemical properties of the intermediate foil through coating layers with specific optical parameters. The foil includes transparent or translucent base layers combined with colored coatings, metallic reflections, or interference patterns that change appearance based on viewing angle, lighting conditions, or environmental factors. This allows a single standardized foil product to deliver multiple aesthetic effects without requiring complex processing of individual foil pieces.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The intermediate foil is designed with multi-functionality by incorporating multiple optical effects within a single standardized product. The foil can simultaneously provide privacy protection, aesthetic decoration, UV filtering, and viewing angle-dependent color changes. This universal design eliminates the need for separate specialized foils for different functions, reducing manufacturing complexity while enhancing versatility.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple individual processing steps are applied to intermediate foil pieces, then optical effects are achieved, but manufacturing effort and costs increase

Engineering Contradiction:
Improveoptical effect capabilityVSAvoidmanufacturing effort
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by pre-coating the intermediate foil with multiple functional layers during the foil manufacturing process itself. The colored coatings, metallic reflections, and interference patterns are applied to the foil in a controlled factory setting before the foil is installed in the glazing system. This preliminary preparation eliminates the need for multiple field processing steps and reduces on-site manufacturing effort.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent merges multiple optical functions into a single intermediate foil product. Instead of applying separate coatings or attachments for color, reflection, and interference effects, all these optical properties are integrated into one standardized foil that can be directly installed. This consolidation reduces the number of manufacturing steps from multiple individual processes to a single integrated product application.

Inventive Principle:
Principle #5Merging (Combining)

3Ease of manufacture

If standardized intermediate foil is used without additional coatings, then production costs are reduced, but viewing angle-dependent aesthetic effects are limited

Engineering Contradiction:
Improveproduction costVSAvoidviewing angle-dependent effect
Core Design Contradiction:
Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The patent achieves viewing angle-dependent effects through parameter changes in the foil's optical structure. By incorporating layers with specific refractive indices, thicknesses, and arrangements, the foil creates interference patterns and color shifts that vary with viewing angle. These parameter optimizations are built into the standardized foil design, allowing aesthetic effects to be achieved without additional costly coatings or processing steps.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The intermediate foil utilizes composite material structures combining transparent plastics or glasses with metallic layers, colored coatings, and interference patterns. This composite construction enables viewing angle-dependent optical effects while maintaining cost-effectiveness through standardized manufacturing processes. The different material layers work together to create complex optical behavior without requiring expensive custom processing.

Inventive Principle:
Principle #40Composite materials

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 composite glass appears differently from various angles, offering aesthetic versatility and cost-effective production by enabling dynamic motifs and color changes without increasing manufacturing complexity or costs, suitable for building and vehicle windows.

Implementation Method 1

The viewing angle dependence is supplied by a relief structure, an interference layer construction or pigments in a pigment layer in the intermediate foil

Methodology Applied
Scientific EffectInterference: Interference

Implementation Method 2

pigments in a pigment layer in the intermediate foil

Methodology Applied
Scientific EffectPigment absorption and reflection: Absorption (EM radiation)

Data Source

PatentUS11745474B2Composite glass with an intermediate film that changes colour depending on the viewing angle
Publication Date: 2023.09.05 GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH
  • US11745474B2 patent drawing
  • US11745474B2 patent drawing
  • US11745474B2 patent drawing

AI summary

A composite glass comprises two glass and/or plastic plates and an intermediate foil arranged between the glass and/or plastic plates. The composite glass, due to the intermediate foil, is configured differently in a side-dependent manner, by appearing to a viewer more transparent from an inner side than from an outer side. The composite glass, due to the intermediate foil, appears to the viewer different in a viewing angle-dependent manner from the outer side.