Phosphor Wheel Counterweight Fixing with UV-Curing Through-Holes
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Solution Overview
Problem
The challenge of firmly fixing a counterweight element to a phosphor wheel in laser projectors due to incomplete curing of light-curable adhesive, resulting from insufficient penetration and irradiation of UV light, is addressed.
Innovation Solution
A wavelength conversion device with through holes and a recess supports the counterweight element, allowing UV light to irradiate the adhesive from both sides, ensuring complete curing and secure fixation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a counterweight element is fixed on the phosphor wheel using light-curing adhesive, then the production efficiency is improved due to short curing time, but the adhesive curing is incomplete because the UV light penetration rate and irradiation range are insufficient, resulting in the counterweight element not being firmly fixed
Solution Approach 1:
The invention introduces through-holes that segment the adhesive layer into multiple regions accessible from different directions. The adhesive layer is divided into first and second portions, where the first portion is cured from one side and the second portion is cured through the through-holes from the opposite side, ensuring complete curing without compromising production efficiency
Solution Approach 2:
The invention adds a dimensional solution by creating through-holes that enable UV light to irradiate the adhesive from both sides of the phosphor wheel. This bidirectional irradiation approach solves the incomplete curing problem caused by insufficient penetration from a single side, while maintaining the fast curing characteristics of light-curing adhesive
2Stability of the object's composition
If the counterweight element is positioned on the phosphor wheel, then the rotation balance is improved, but the adhesive cannot be firmly cured due to blocked UV light penetration, leading to poor fixation
Solution Approach 1:
The through-holes segment the structure to allow UV light to reach the adhesive from multiple directions. The adhesive is divided into regions cured from different sides, ensuring that the fixation strength is not compromised while maintaining the counterweight element's position for rotation balance
Solution Approach 2:
The through-holes act as intermediaries that transmit UV light to the adhesive layer from the opposite side of the phosphor wheel. This intermediary structure enables complete curing of the adhesive without interfering with the counterweight element's positioning function
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 adhesive curing is enhanced, securing the counterweight element firmly to the device, while improving heat dissipation efficiency and preventing separation during rotation.
Implementation Method 1
The adhesive material used may be a light-curing adhesive... when light-curing the light-curable adhesive... the adhesive is light-cured toward a direction of the first surface, and the adhesive is light-cured toward a direction of the second surface through the through holes
Data Source
AI summary
A wavelength conversion device includes a main body, a counterweight element, and an adhesive. The main body has a first surface, a second surface, multiple through holes, and a recess. The recess is located on the central axis of the wavelength conversion device and is recessed into the main body relative to the first surface, and the recess has a blocking surface surrounding the central axis. The through holes has multiple segments, which are respectively partial inner walls of the through holes. The counterweight element is disposed in the recess and is supported by the blocking surface. An orthographic projection of the through hole corresponding to at least one of the segments on the second surface at least partially overlaps the orthographic projection of the counterweight element on the second surface in the direction parallel to the central axis. The adhesive at least partially covers the counterweight element.