Wavelength-converting Substrate with Complementary Engagement Portions
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Solution Overview
Problem
Conventional wavelength-converting devices experience noise and structural instability due to wind shear and centrifugal forces during high-speed rotation, leading to potential damage and safety hazards.
Innovation Solution
A wavelength-converting device design featuring complementary engagement portions on substrates that are fixed together, reducing wind shear noise and preventing substrate separation, with a one-piece fixing element ensuring rotational balance and easy assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If a notch is designed on the substrate to control blue light laser transmission, then the amount of blue light can be adjusted, but wind shear noise is produced during high-speed rotation
Solution Approach 1:
The substrate is divided into multiple segments (first substrate, second substrate, third substrate) with each having specific functional regions. The notch is integrated into this segmented structure, allowing light control while reducing wind shear noise through the segmented design that disrupts noise-generating airflow patterns.
Solution Approach 2:
Different regions of the substrate are assigned different properties: the first region allows blue light transmission, the second region contains wavelength-converting material for converting blue light to yellow light, and the third region reflects yellow light. This local differentiation optimizes both light control and noise reduction in specific areas.
2Object-generated harmful factors
If glass is embedded in the notch to reduce noise, then wind shear noise is reduced, but the glass may separate from the substrate due to centrifugal force in high-speed rotation
Solution Approach 1:
The first substrate, second substrate, and third substrate are combined into an integrated multi-layer structure where the notch is formed as part of the overall substrate assembly rather than a separate embedded component. This merging eliminates the separation issue while maintaining noise reduction benefits through the integrated design.
Solution Approach 2:
The wavelength-converting device uses composite structure combining multiple substrate materials with different optical properties. The first substrate allows blue light transmission, the second substrate contains phosphor material for wavelength conversion, and the third substrate reflects yellow light. This composite approach provides both structural integrity and functional performance.
3Adaptability or versatility
If multiple substrates are used for different light source applications, then design diversity is enhanced, but assembly complexity increases
Solution Approach 1:
The device is segmented into three distinct substrates, each optimized for specific light source applications. This segmentation allows flexible configuration where different substrate combinations can be used for different applications (e.g., white LED, yellow LED, blue LED) without redesigning the entire device structure.
Solution Approach 2:
The multi-substrate design provides universal applicability across different light source types. The same basic structure with first, second, and third substrates can be adapted for white LED, yellow LED, blue LED, and other light sources by adjusting the optical properties of specific substrate regions, eliminating the need for application-specific redesigns.
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
Enhances safety and stability, reduces noise, and allows for diverse light source applications through the use of different substrates and wavelength-converting materials, facilitating convenient assembly and cost reduction.
Implementation Method 1
a first wavelength-converting material disposed on the second region for converting a light in a first waveband into a light in a second waveband
Data Source
AI summary
A wavelength-converting device includes a first substrate, a second substrate and a first wavelength-converting material. The first substrate has a first region and a first engagement portion. The second substrate is disposed adjacent to the first substrate and having a second region and a second engagement portion. The second engagement portion and the first engagement portion have complementary shapes. The first wavelength-converting material is disposed on the second region for converting a light in a first waveband into a light in a second waveband. The light in the first waveband is transmitted through the first region, and the light in the second waveband is reflected by the second region. The first region and the second region are staggered, so that the first engagement portion and the second engagement portion are engaged and fixed with each other. As a result, the safety and stability are enhanced, and the noise is reduced.