Wavelength Conversion Wheel Module for Laser Illumination
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Solution Overview
Problem
Current projection devices using solid state light sources, such as LEDs and laser diodes, face limitations in achieving high output brightness and flexibility in adjusting light sources for different illumination needs, particularly in producing pure color light sources efficiently.
Innovation Solution
A wavelength conversion wheel module with annular areas of different optical parameters, where each area includes wavelength conversion and light passing areas, is used to convert original light beams into beams of different wavelengths, and a color wheel with light filtering areas to achieve various illumination effects by rotating and positioning these areas relative to the light path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple laser arrays are adopted to achieve high output brightness, then the light output power increases, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple laser diodes into a single integrated laser array module with shared optical components (collimating lens, focusing lens, phosphor conversion wheel), reducing overall device complexity while maintaining high light output power through the array configuration
Solution Approach 2:
The single optical path design serves multiple functions: it can excite different phosphor materials (yellow, red, green) to produce different color outputs, and the same optical components handle both direct laser transmission and phosphor-converted light, reducing the number of components needed
2Device complexity
If conventional UHP lamps are used as light sources, then the illumination system is simple, but the luminous efficiency is low
Solution Approach 1:
The patent changes the fundamental operating parameters by using laser diodes with specific wavelengths (405nm, 450nm, 532nm) that match phosphor excitation peaks, and controls phosphor conversion parameters to achieve high luminous efficiency (over 20%) compared to conventional UHP lamps
Solution Approach 2:
The patent uses composite phosphor materials (yellow phosphor, red phosphor, green phosphor) combined with laser diodes to create a multi-component light source system that achieves high efficiency through optimized material interactions
3Device complexity
If a single wavelength conversion area is used, then the device structure is simple, but the illumination flexibility is limited
Solution Approach 1:
The wavelength conversion wheel is segmented into multiple independent conversion areas (first, second, third areas) with different phosphor materials, allowing the system to select different wavelength conversion paths based on desired output, providing illumination flexibility while maintaining a compact single-wheel structure
Solution Approach 2:
The patent implements dynamic switching between different wavelength conversion areas through rotation of the conversion wheel, allowing real-time adjustment of illumination characteristics without mechanical reconfiguration or multiple fixed devices
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 solution allows for the production of diverse illumination effects and continuous changes in illumination, enhancing the flexibility and efficiency of light source adjustment in projection devices, potentially replacing conventional UHP lamps with solid state light sources.
Implementation Method 1
The at least one wavelength conversion area converts an original light beam incident on the wavelength conversion area into at least one converted light beam, wherein the wavelength of the converted light beam is different from the wavelength of the original light beam
Data Source
AI summary
A wavelength conversion wheel module and an illumination system are provided. The wavelength conversion wheel module includes a wavelength conversion wheel and a first actuator. The wavelength conversion wheel includes a plurality of annular areas. Each of the annular areas includes at least one wavelength conversion area and at least one light passing area. The wavelength conversion area converts an original light beam incident on the wavelength conversion area into a converted light beam. The wavelength of the converted light beam is different from the wavelength of the original light beam. The annular areas are arranged along the radial direction of the wavelength conversion wheel, and different annular areas have different optical parameters. The optical parameters of the annular areas are related to the wavelength conversion area and the light passing area. The first actuator is connected to the wavelength conversion wheel, and drives the wavelength conversion wheel to rotate.