Wavelength Conversion Element Adhesive Density Balancing
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Solution Overview
Problem
Existing phosphor wheels in projectors often have initial imbalances due to differing densities of wavelength conversion materials and light-transmitting plates, requiring numerous counterweight members, increasing manufacturing time and cost.
Innovation Solution
A wavelength conversion element with an adhesive layer having a first adhesive portion of higher density and a second adhesive portion of lower density, which reduces initial unbalance and potentially eliminates the need for counterweight members, by strategically arranging these adhesive portions to balance the centroid of the wavelength conversion plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If traditional adhesive layers with uniform density are used to bond the wavelength conversion plate and fixing ring, then the manufacturing process is simple, but the initial unbalance is large requiring numerous counterweight members
Solution Approach 1:
The adhesive layer is designed with non-uniform density distribution, where different regions have different densities. Specifically, the adhesive layer has a first density in a first region and a second density in a second region, allowing the adhesive layer itself to function as a counterweight and reduce initial unbalance without requiring additional counterweight members.
Solution Approach 2:
The adhesive layer is constructed as a composite material with regions of different densities. This composite structure enables the adhesive layer to simultaneously provide bonding function and balance the centrifugal force, eliminating the need for separate counterweight components.
2Manufacturing precision
If numerous counterweight members are added to reduce initial imbalance, then the balance quality improves, but the manufacturing process time increases and cost rises
Solution Approach 1:
The invention merges the bonding function and the counterweight function into a single component - the adhesive layer. By integrating these two functions, the need for separate counterweight members is eliminated, thereby reducing manufacturing process time and cost while maintaining balance quality.
Solution Approach 2:
The counterweight function is extracted from separate counterweight members and incorporated directly into the adhesive layer. This extraction eliminates the need for additional components and simplifies the manufacturing process.
3Manufacturing precision
If numerous counterweight members are added to reduce initial imbalance, then the balance quality improves, but the cost increases
Solution Approach 1:
The bonding function and counterweight function are merged into the adhesive layer, eliminating the need for separate counterweight members and reducing overall manufacturing cost.
Solution Approach 2:
The adhesive layer serves multiple functions: it bonds the wavelength conversion plate to the fixing ring and simultaneously acts as a counterweight to balance the rotating assembly. This multi-functionality reduces the number of components needed and lowers cost.
Data Source
AI summary
A wavelength conversion element includes a wavelength conversion plate, a fixing ring and an adhesive layer. The wavelength conversion plate has a supporting surface. The fixing ring is disposed on the supporting surface. The adhesive layer is configured to adhere the fixing ring to the wavelength conversion plate. The adhesive layer includes a first adhesive portion and a second adhesive portion, and a density of the first adhesive portion is greater than a density of the second adhesive portion. A projection device including the aforementioned wavelength conversion element is also provided. The wavelength conversion element and the projection device provided by the invention have the advantages of short manufacturing process time and low cost.