Wavelength Conversion Device Closed Slot Transparent Element Noise Reduction
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Solution Overview
Problem
Laser projectors using phosphor wheels with hollow slots generate airborne noise and have reduced heat dissipation efficiency due to asymmetric structures and additional slots added to mitigate wobble, which increase noise and decrease heat dissipation.
Innovation Solution
A wavelength conversion device with a closed slot encircled by a containing recess and stop portion, where a transparent element is disposed to prevent noise and enhance heat dissipation by forming a disk-like structure without additional slots, and a retaining structure to stabilize the transparent element.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hollow slot is configured on the metal substrate to allow laser light to pass through, then the projector can generate lights of various colors, but airborne noise is generated during rotation
Solution Approach 1:
The patent extracts the harmful function of the hollow slot (generating airborne noise) while retaining its useful function (allowing laser light to pass through). The solution replaces the hollow slot with a transparent element that fills the slot, eliminating the noise source while maintaining the light transmission capability.
Solution Approach 2:
The patent introduces a transparent element as an intermediary substance to fill the hollow slot. This intermediary material serves dual purposes: it blocks the airborne noise generation while allowing laser light to pass through, thus resolving the contradiction between noise reduction and light transmission.
2Stability of the object's composition
If another hollow slot is added to symmetrize the metal substrate structure, then excessive wobble during rotation is reduced, but airborne noise is aggravated and heat dissipation efficiency is degraded
Solution Approach 1:
The patent removes the harmful effect of additional hollow slots by filling them with transparent elements. This eliminates the aggravated airborne noise while maintaining the structural symmetrization needed to reduce wobble, thus resolving the contradiction between stability and noise.
Solution Approach 2:
The transparent element acts as an intermediary that fills the hollow slots, providing structural support to reduce wobble while blocking the airborne noise generation. This intermediary solution allows the substrate to maintain symmetry without the harmful effects of hollow slots.
3Stability of the object's composition
If another hollow slot is added to symmetrize the metal substrate structure, then excessive wobble during rotation is reduced, but heat dissipation area is decreased
Solution Approach 1:
The patent extracts the harmful effect of reduced heat dissipation area by filling hollow slots with transparent elements. This restores the heat dissipation area while maintaining the structural stability provided by the symmetrized slot configuration.
Solution Approach 2:
The transparent element serves as an intermediary that fills the hollow slots, providing structural support for stability while maintaining thermal conduction paths for heat dissipation, thus resolving the contradiction between stability and heat dissipation area.
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 reduces airborne noise and improves heat dissipation efficiency by eliminating the need for additional slots and creating a stable, disk-like structure that maintains the projector's performance while reducing fabrication costs.
Implementation Method 1
a blue excitation beam emitted by a light emitter excites the phosphor powder on the opaque substrate or directly penetrates through the diffusion substrate
Implementation Method 2
a transparent diffusion substrate adjacent to each other, a blue excitation beam emitted by a light emitter excites the phosphor powder on the opaque substrate or directly penetrates through the diffusion substrate
Data Source
AI summary
A wavelength conversion device including a main body and a transparent element is provided. The main body has at least one wavelength conversion region, a containing recess portion, and a stop portion. The containing recess portion and the stop portion encircle a closed slot. The transparent element is disposed in the closed slot to construct a light penetration region. The stop portion stops the transparent element along a radial direction of the main body. Moreover, a projector using the wavelength conversion device is also mentioned.