Phosphor Wheel Counterweight Ring for UV Adhesive Curing
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Solution Overview
Problem
The dynamic balance of phosphor wheels in projection devices is often unbalanced, leading to incomplete curing of UV-curable adhesives due to obstruction by opaque metal sheets, which affects the reliability of the adhesion between the metal sheet and metal ring.
Innovation Solution
A wavelength conversion device with a light-transmitting counterweight ring and counterweight members, allowing photocurable materials to be irradiated from lateral, oblique, and lower sides, enhancing curing effect and structural strength through increased optical paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an opaque metal sheet is added to the phosphor wheel to adjust the centroid position and improve dynamic balance, then the dynamic balance is improved, but the UV-curable adhesive cannot receive sufficient UV light due to being covered by the metal sheet, resulting in incomplete curing and adhesion reliability issues
Solution Approach 1:
The patent changes the optical property of the counterweight ring from opaque to light-transmitting, allowing UV light to pass through and cure the adhesive properly while maintaining the counterweight function for dynamic balance adjustment
Solution Approach 2:
The light-transmitting counterweight ring acts as an intermediary that allows UV light to pass through to the adhesive layer, solving the problem of incomplete curing while maintaining the counterweight function
2Manufacturing precision
If a metal sheet is added into adhesive to adjust the centroid position of the phosphor wheel, then the centroid position is adjusted for dynamic balance, but the UV-curable adhesive cannot be completely cured due to obstruction by the opaque metal sheet
Solution Approach 1:
The counterweight ring is designed to be light-transmitting rather than opaque, enabling UV light to pass through and complete the curing of the adhesive while maintaining the ability to adjust centroid position for manufacturing precision
3Ease of manufacture
If UV-curable adhesive is used to attach the metal sheet to the metal ring for convenience of process, then the manufacturing process is simplified, but the adhesive cannot receive sufficient UV light and cannot be completely cured
Solution Approach 1:
The counterweight ring is designed with light-transmitting properties to allow UV light to pass through the adhesive layer, enabling complete curing while maintaining the ease of manufacturing process using UV-curable adhesive
Solution Approach 2:
The light-transmitting counterweight ring serves as an intermediary that facilitates UV light transmission through the adhesive, ensuring complete curing while maintaining process convenience
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
Improves the curing effect and structural strength of photocured components by ensuring complete irradiation of photocurable materials, thereby stabilizing the wavelength conversion device and projection device.
Implementation Method 1
at least part of the photocured component is located between the weight and the light-transmitting counterweight ring
Data Source
AI summary
A wavelength conversion device includes a disk, a wavelength conversion material, a light-transmitting counterweight ring, a first adhesive layer and at least one counterweight member. The disk has a central axis and rotates around the central axis as the rotation axis. The wavelength conversion material is arranged on the outer edge of the upper surface of the disk. The light-transmitting counterweight ring is arranged on the upper surface of the disk. The first adhesive layer is arranged between the light-transmitting counterweight ring and the disk. At least one counterweight member is disposed on one side of the light-transmitting counterweight ring away from the disk. The at least one counterweight member includes a weight and a photocured component covering the weight, and at least part of the photocured component is located between the weight and the light-transmitting counterweight ring. A projection device is also provided.