Laminated Glass Interlayer Film With Dual Gradation for Unified Appearance
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Solution Overview
Problem
Conventional laminated glass interlayer films with colored regions fail to provide unity of appearance, as light from high mounted stop lamps penetrates uncolored regions, making colored and uncolored regions visually distinct, which is unsuitable for modern design requirements in rear and roof glass applications.
Innovation Solution
An interlayer film with first and second colored parts having gradation parts where visible light transmittance increases from one end to the other, with configurations ensuring the gradation part tips align, overlap, or maintain a specific distance, ensuring a unified appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a colored interlayer film is used to achieve privacy protectability, then privacy protection is improved, but light penetration from high mounted stop lamp deteriorates
Solution Approach 1:
The interlayer film is designed with different optical properties in different regions: colored parts provide privacy protection while uncolored parts allow light penetration. This local differentiation of properties resolves the contradiction by applying coloration only where privacy is needed while maintaining transparency where stop lamp visibility is required.
Solution Approach 2:
The interlayer film is divided into multiple regions with distinct functions: colored parts for privacy protection and uncolored parts for light transmission. This segmentation allows simultaneous achievement of privacy protection and adequate stop lamp visibility by assigning different optical characteristics to different segments of the film.
2Object-affected harmful factors
If colored regions are added to the interlayer film for privacy protection, then privacy protectability is improved, but unity of appearance deteriorates
Solution Approach 1:
The film structure incorporates colored and uncolored regions with distinct local properties. The colored parts provide privacy protection while the uncolored parts maintain appearance unity, allowing both requirements to be satisfied through spatial differentiation of optical characteristics.
Solution Approach 2:
The interlayer film is segmented into colored parts for privacy and uncolored parts for aesthetic continuity. This segmentation strategy enables the film to simultaneously achieve privacy protection in specific areas while maintaining overall visual unity through transparent regions that allow uniform light transmission.
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 interlayer film achieves a unified appearance by integrating gradation parts, allowing satisfactory recognition of back or brake light, enhancing design quality in laminated glass for automobiles and other applications.
Implementation Method 1
a first gradation part where visible light transmittance increases from the one end side toward the other end side of the interlayer film
Data Source
AI summary
Provided is an interlayer film for laminated glass that is excellent in unity of appearance. An interlayer film for laminated glass according to the present invention has a first colored part including a part located on one end side of the interlayer film, and a second colored part including a part located on the other end side of the interlayer film, the first colored part has a first gradation part where visible light transmittance increases from the one end side toward the other end side of the interlayer film, the first gradation part forms a tip of the first colored part on the other end side of the interlayer film, the second colored part has a second gradation part where visible light transmittance increases from the other end side toward the one end side of the interlayer film, the second gradation part forms a tip of the second colored part on the one end side of the interlayer film, and the first gradation part and the second gradation part exist in a specific positional relationship.