Wavelength Conversion Element Asymmetric Spoiler Balance
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Solution Overview
Problem
Existing wavelength conversion elements in laser projection devices often suffer from initial unbalance due to density differences between wavelength conversion materials and light-transmitting plates, leading to vibrations, noise, and increased motor load, which affects the service life and durability of the device.
Innovation Solution
A wavelength conversion element with a rotatable disc and spoiler structures on opposite sides, where the centroid of at least one spoiler structure deviates from the disc's center, allowing for adjustment of the disc's position to reduce initial unbalance, potentially eliminating the need for counterweight glue and improving motor durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wavelength conversion materials with different densities are used to achieve wavelength conversion functionality, then the wavelength conversion performance is improved, but the initial unbalance of the rotatable disc increases
Solution Approach 1:
The patent applies asymmetry by intentionally designing the spoiler structures with centroids that deviate from the center of the rotatable disc. This asymmetric arrangement creates counterbalancing effects that compensate for the unbalance caused by density differences in wavelength conversion materials, thereby resolving the contradiction between achieving wavelength conversion functionality and maintaining rotational balance.
Solution Approach 2:
The patent implements counterweight principles by positioning spoiler structures with specific centroid deviations that generate counterbalancing forces. These spoiler structures act as built-in counterweights that offset the unbalance caused by the wavelength conversion materials, eliminating the need for additional counterweight glue and reducing the initial unbalance of the rotatable disc.
2Manufacturing precision
If counterweight glue is installed to reduce initial unbalance, then the rotational balance is improved, but the motor load increases and service life decreases
Solution Approach 1:
The patent applies self-service by integrating the balance correction function directly into the spoiler structures of the wavelength conversion element. The spoiler structures with deviated centroids automatically provide counterbalancing effects during rotation, eliminating the need for separate counterweight glue installation and reducing motor load, thereby extending motor service life while maintaining rotational balance.
3Manufacturing precision
If counterweight glue is used to correct unbalance, then the initial unbalance is reduced, but the quality difference increases due to heating and irradiation
Solution Approach 1:
The patent extracts the counterweight function from the separate counterweight glue component and integrates it into the spoiler structures of the wavelength conversion element. This eliminates the quality issues associated with counterweight glue heating and irradiation, as the spoiler structures are made of materials that are stable under operating conditions while providing the necessary counterbalancing effects.
Data Source
AI summary
A wavelength conversion element includes a rotatable disc, a first spoiler structure and a second spoiler structure. The rotatable disc has a supporting surface and a back surface opposite to the supporting surface. The first spoiler structure is disposed on the supporting surface and arranged along a first track surrounding a center of the rotatable disc. The second spoiler structure is disposed on the back surface and arranged along a second track surrounding the center. A centroid of at least one of the first spoiler structure and the second spoiler structure is deviated from the center. A projection device adopting the aforementioned wavelength conversion element is also provided. The wavelength conversion element of the invention can reduce the initial unbalance and the projection device of the invention can improve the durability.