Wavelength Conversion Module Segmentation for Projection Reliability
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Solution Overview
Problem
Projection apparatuses using solid-state light sources face reliability and color performance issues due to increased energy density in wavelength conversion modules during high-intensity modes, leading to potential damage and reduced efficiency.
Innovation Solution
The implementation of a wavelength conversion module with distinct structural regions on opposite surfaces of a substrate, allowing for independent control of excitation light source modules to adjust energy distribution based on illumination modes, thereby balancing reliability and color performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the current intensity of the excitation light is increased to improve color performance in theatre mode, then the color performance is improved, but the energy density on the wavelength conversion module increases causing potential damage and reduced reliability
Solution Approach 1:
The wavelength conversion module is divided into multiple independent wavelength conversion regions (first red, first green, second red, second green regions) with different phosphor materials. This segmentation allows each region to be optimized for specific wavelength conversion tasks, distributing the energy load and preventing any single region from experiencing excessive energy density that could cause damage.
Solution Approach 2:
Different phosphor materials are used in different regions of the wavelength conversion module. Specifically, the first and second red regions use first phosphor materials while the first and second green regions use second phosphor materials. This local quality differentiation enables each region to convert excitation light most efficiently for its intended output wavelength, reducing overall energy waste and heat generation.
2Illumination intensity
If the current intensity is increased to improve brightness in briefing reporting mode, then the brightness performance is improved, but the energy distribution becomes unbalanced affecting color performance
Solution Approach 1:
The illumination system dynamically switches between different wavelength conversion regions based on the operating mode. In briefing reporting mode requiring high brightness, the system activates specific regions (e.g., green regions for brightness) while in theatre mode requiring high color performance, it activates regions optimized for color accuracy. This dynamic activation pattern allows brightness optimization without compromising color performance through unbalanced energy distribution.
Solution Approach 2:
The modular segmentation of wavelength conversion regions enables selective activation of specific regions based on operational requirements. By activating only the necessary regions for the current mode, the system achieves high brightness when needed while maintaining balanced energy distribution across the entire module, preventing color performance degradation.
3Device complexity
If a single wavelength conversion region is used for both red and green light output, then the device complexity is reduced, but the ability to independently control energy distribution for different modes is limited
Solution Approach 1:
The wavelength conversion module is designed with multiple regions that can serve different functions depending on activation patterns. The same physical module structure can provide high color performance in theatre mode by activating color-optimized regions, or high brightness in briefing reporting mode by activating brightness-optimized regions. This multi-functionality allows a single module to replace what would otherwise require separate modules for different operational modes.
Solution Approach 2:
The system employs dynamic control of different wavelength conversion regions within a single module. By selectively activating specific regions based on operational mode, the system achieves adaptability without requiring physically separate modules for each mode. The excitation light source can be dynamically directed to different regions, enabling mode switching while maintaining a unified, relatively simple module structure.
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 ensures the wavelength conversion module can withstand energy densities in high chroma illumination modes without damage, maintaining reliability and enhancing color performance by adjusting the color mixing ratio, resulting in a stable and high-quality output image beam.
Implementation Method 1
excitation lights of these solid-state light sources are converted by a wavelength conversion material on a wavelength conversion module in the projection apparatus to produce converted lights of different colors
Data Source
AI summary
An illumination system, a wavelength conversion module, a projection apparatus and an illumination control method are provided. The illumination system includes excitation light source modules emitting excitation beams and a wavelength conversion module located on a transmission path of the excitation beams and including a substrate, a first region and a second region. The first and second regions are respectively located on a first surface and a second surface of the substrate. When the illumination system is in a high chroma illumination mode, one of the excitation light source modules provides the excitation beams to the first region, and the excitation beams form a first illumination beam through the first region. When the illumination system is in a high brightness illumination mode, one of the excitation light source modules provides the excitation beams to the second region, and the excitation beams form a second illumination beam through the second region.