Color Wheel Module Outer Periphery Wavelength Conversion
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Solution Overview
Problem
Current projector designs face limitations in space allocation and heat dissipation efficiency due to the radial placement of wavelength conversion regions on heat dissipation substrates, which restricts optical path flexibility and excitation efficiency.
Innovation Solution
A color wheel module with wavelength conversion layers positioned on the outer periphery of a substrate, where filters are arranged perpendicular to the rotating axis, allowing for improved heat dissipation and excitation efficiency by directing the excitation beam perpendicularly or obliquely onto the conversion region and guiding the conversion beam through filters parallel to the central axis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the wavelength conversion region is provided on the radial plane of the heat dissipation substrate, then the excitation beam can be directed through the conversion region, but the optical path flexibility is restricted and space arrangement is reduced
Solution Approach 1:
The patent transitions from a two-dimensional radial arrangement (where the wavelength conversion region is on the radial plane of the heat dissipation substrate) to a three-dimensional configuration (where the conversion region is arranged on the outer periphery of the substrate). This dimensional change allows the optical path to be arranged more flexibly in space, enabling the excitation beam to pass through the conversion region more effectively while improving optical path flexibility without increasing device complexity.
2Loss of energy
If the wavelength conversion layers are positioned closer to the outer diameter of the heat dissipation substrate, then the heat dissipation efficiency improves due to higher linear velocity, but the average position cannot be provided on the outermost outer diameter
Solution Approach 1:
The patent applies local quality by positioning the wavelength conversion layers specifically on the outer periphery of the substrate, which is the region with highest linear velocity for heat dissipation. This localized placement optimizes heat dissipation efficiency at the critical outer diameter region while maintaining manufacturability, resolving the contradiction between heat dissipation efficiency and positioning precision.
3Productivity
If multiple wavelength conversion layers are disposed on the same plane, then they can be excited simultaneously, but currently they must be separately excited at different timings resulting in poor excitation efficiency
Solution Approach 1:
The patent arranges multiple wavelength conversion layers in the radial direction rather than on the same plane, allowing the excitation beam to pass through all layers simultaneously. This spatial reconfiguration eliminates the need for sequential timing control, thereby improving excitation efficiency and eliminating time delays associated with sequential excitation.
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
This configuration enhances heat dissipation and wavelength conversion efficiency, increases space design flexibility, and improves projection quality and product competitiveness by up to 300% in heat dissipation and excitation efficiency.
Implementation Method 1
The excitation beam is incident on the light conversion region of the substrate and converted into a conversion beam
Implementation Method 2
The heat needs to be withdrew through the heat dissipation substrate to reduce the temperature of the wavelength conversion layers
Data Source
AI summary
A color wheel module is disposed on a transmission path of an excitation beam and includes a driving assembly, a substrate, a fastening element, at least one wavelength conversion layer, and filters. The substrate is connected to the filters, and the filters are fixed between the fastening element and the driving assembly. The substrate includes an outer periphery and a light conversion region located on the outer periphery. The outer periphery extends in an extension direction and has a width parallel to the extension direction. The extension direction and a radial direction of the substrate forms an included angle. The wavelength conversion layers are disposed in the light conversion region. The excitation beam is incident on the light conversion region of the substrate and converted into a conversion beam, and the conversion beam is guided to penetrate the corresponding filter along a direction parallel to the central axis.