Watch Dial Light Scattering via Recessed Metal Film Holes
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Solution Overview
Problem
Existing watch dial designs suffer from interference patterns caused by reflected light, leading to a deterioration in appearance and a compromised high-quality feel due to the arrangement of small holes and island-shaped sections in metal films.
Innovation Solution
A watch component featuring a light-transmissive base material with recessed portions and a metal film having through holes, where the recessed portions have a curved and rough bottom surface, and convex portions at the opening ends of the holes, scattering incident light to reduce glare.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a large number of small holes are arranged in the metal film to improve light transmittance, then light transmittance is improved, but interference patterns appear causing appearance deterioration
Solution Approach 1:
The patent applies local quality by creating regions with different hole densities - a first region with a first density of holes and a second region with a second density of holes. This spatial variation in hole distribution allows different areas to serve different functions: one area optimizes light transmittance while another minimizes interference patterns, thus resolving the contradiction between improving light transmittance and preventing appearance deterioration.
Solution Approach 2:
The patent changes the parameter of hole density across different regions of the metal film. By varying the density of holes from one region to another, the patent optimizes both light transmittance (in regions with appropriate hole density) and interference pattern suppression (in regions where hole density is adjusted to minimize interference), thereby resolving the technical contradiction.
2Object-affected harmful factors
If island-shaped sections are formed in the metal film to reduce interference, then appearance quality is improved, but manufacturing complexity increases
Solution Approach 1:
The patent segments the metal film into distinct regions - a first region and a second region with different hole densities. This segmentation approach reduces interference patterns by creating boundaries between regions with different optical properties, while the segmentation itself is achieved through a relatively simple process of varying hole density rather than creating complex island-shaped structures, thus balancing appearance quality and manufacturing complexity.
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 solution effectively suppresses interference patterns, enhancing the appearance by reducing glare and maintaining light transmittance, while also reducing manufacturing costs through laser machining or other methods.
Implementation Method 1
a rough surface having an arithmetic average roughness Ra that is greater than 0.01 μm and less than 0.5 μm
Data Source
AI summary
A watch component is provided with a base material having light transmissivity, and a metal film layered on the base material. The metal film includes a plurality of through holes formed penetrating the metal film, and recessed portions are formed in the base material in positions corresponding to the through holes.