Wavelength Conversion Module Fixing Ring for Heat-Stable Attachment
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Solution Overview
Problem
The issue of overheating and adhesive degradation in wavelength conversion layers of laser projection systems due to inadequate heat dissipation, leading to detachment and reduced image quality, is addressed by the use of a fixing ring to secure the wavelength conversion member on a substrate, eliminating the need for glue and enhancing structural reliability.
Innovation Solution
A wavelength conversion module with a substrate and a fixing ring that presses on the wavelength conversion member within a groove, providing physical fixation and improved heat dissipation through a thermal interface material, ensuring the member remains securely attached during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the wavelength conversion layer is glued on the turntable, then the assembly is simple, but the adhesive degrades due to overheating causing detachment
Solution Approach 1:
The patent replaces the adhesive bonding system with a mechanical pressing system. A pressing member applies mechanical force to secure the wavelength conversion layer to the turntable, eliminating the adhesive layer that degrades under heat. This substitution resolves the contradiction by maintaining assembly simplicity while ensuring reliable attachment through mechanical means that can withstand thermal conditions.
2Reliability
If the wavelength conversion layer is fixed by locking members, then the attachment is secure, but the locking members may pass through the laser beam path causing image quality degradation
Solution Approach 1:
The patent applies local quality by positioning the pressing member specifically at the peripheral region of the wavelength conversion layer, away from the central laser beam path. This localized pressing approach secures the wavelength conversion layer reliably while avoiding interference with the laser beam, thus maintaining image quality. The pressing force is applied where it is most effective for attachment without compromising optical performance.
3Illumination intensity
If the number of laser light sources or wattage is increased, then the brightness is improved, but the heat energy accumulates on the turntable causing overheating
Solution Approach 1:
The patent converts the harmful heat energy generated by high-power lasers into a beneficial pressing force. The heat accumulation on the turntable is utilized to activate a thermal expansion mechanism or is simply accepted as the operating condition that the pressing member is designed to withstand. This approach allows the system to operate at high brightness levels while managing thermal effects through the designed pressing mechanism that can handle the thermal load.
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 enhances structural reliability, allows for easy assembly and disassembly, and improves projection quality by preventing peeling and overheating, thus increasing the competitiveness of the projection device.
Implementation Method 1
The fixing ring is configured to press on a portion of the wavelength conversion member corresponding to an inner region and an outer region of the groove
Implementation Method 2
improved heat dissipation through a thermal interface material
Data Source
AI summary
A wavelength conversion module, including a substrate, a wavelength conversion member, and a fixing ring, is provided. The substrate has an annular groove. The wavelength conversion member is disposed in the annular groove of the substrate. The fixing ring is disposed on the substrate and is configured to press on an inner region and an outer region of the annular groove and a portion of the wavelength conversion member to expose another portion of the wavelength conversion member and fix the wavelength conversion member on the substrate. In addition, a projection device, applying the wavelength conversion module, is also provided. The wavelength conversion module of the present invention and the projection device applying the wavelength conversion module have better structural reliability and assembly flexibility.