Watch Component Multilayer Film Pattern Design
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Solution Overview
Problem
Existing watch designs struggle to express a freely selected pattern and enhance design properties while maintaining high light transmittance and deep color tones, as seen in JP-A-2011-106937.
Innovation Solution
A watch component featuring a multilayer film with a color adjusting film, a first transparent film having a predetermined refractive index and formed in a freely selected pattern, and a second transparent film with a different refractive index, stacked on a substrate, allowing for the expression of various color tones and patterns.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If layers A and layers B with different refractive indices are alternately stacked to express deep color tones, then light transmittance is maintained at a high level, but the ability to express freely selected patterns and enhance design properties is limited
Solution Approach 1:
The patent divides the transparent film into multiple layers with different refractive indices (first transparent film with refractive index n1, second transparent film with refractive index n2 where |n1-n2|≥0.05). These segmented layers are stacked in different configurations to create both deep color tones and freely selectable patterns, resolving the contradiction between maintaining high light transmittance and achieving design freedom.
2Ease of manufacture
If layers A and layers B with different refractive indices are alternately stacked to express deep color tones, then light transmittance is maintained at a high level, but the ability to express freely selected patterns and enhance design properties is limited
Solution Approach 1:
The patent specifies that the absolute difference in refractive index between the first and second transparent films should be 0.05 or more (|n1-n2|≥0.05). This parameter change enables sufficient color tone differentiation and pattern visibility while maintaining compatibility with conventional manufacturing processes, thus resolving the contradiction between ease of manufacture and manufacturing precision.
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 the application of freely selected color tones and patterns, enhancing design properties by creating distinct color differences that can be visually recognized, thereby improving the aesthetic appeal of watch components like dials, hands, and bezels.
Implementation Method 1
a first transparent film stacked at the multilayer film, having a predetermined refractive index, and formed in a freely selected pattern, and a second transparent film stacked at the first transparent film or the multilayer film, and having a refractive index different from that of the first transparent film by a predetermined difference
Data Source
AI summary
A watch component of the present disclosure includes a substrate, a multilayer film that covers at least a part of the substrate and includes a color adjusting film having a function of adjusting a color tone, a first transparent film stacked at the multilayer film, having a predetermined refractive index, and formed in a freely selected pattern, and a second transparent film stacked at the first transparent film or the multilayer film, and having a refractive index different from that of the first transparent film by a predetermined difference.