Laser Source Combining Component for Miniaturized Projection
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Solution Overview
Problem
The challenge in developing miniaturized laser projection apparatuses is to achieve a balance between miniaturization, cost, volume, and optical efficiency, while maintaining the basic illumination function of the laser source.
Innovation Solution
The proposed solution involves a laser source comprising a light-emitting assembly, a phosphor wheel, a converging lens group, and a combining component. The phosphor wheel includes a fluorescence-exciting region and a laser-reflecting region, and the combining component has alternating light reflecting and laser transmitting regions to efficiently direct and combine the laser and fluorescent beams.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the laser source uses a conventional structure to maintain basic illumination function, then the illumination function is achieved, but the volume and cost increase
Solution Approach 1:
The patent combines multiple optical functions into a single integrated laser source structure. The light-emitting assembly, phosphor wheel, converging lens group, and combining component work together in one compact unit to generate and combine laser beams and fluorescent beams, achieving miniaturization while maintaining complete illumination functionality
Solution Approach 2:
The phosphor wheel serves multiple functions: it generates fluorescent beams through the fluorescence-exciting region, reflects laser beams through the laser-reflecting region, and both types of beams are combined by the combining component. This multi-functional design reduces the number of separate components needed, decreasing volume while preserving illumination capability
2Volume of moving object
If the laser source is miniaturized to reduce volume, then the volume decreases, but the optical efficiency may be compromised
Solution Approach 1:
The combining component features alternating light reflecting regions and laser transmitting regions with different optical properties. The light reflecting regions reflect fluorescent beams while the laser transmitting regions transmit laser beams, allowing each region to be optimized for its specific function. This local optimization maintains high optical efficiency despite the compact size
Solution Approach 2:
The patent uses a planar phosphor wheel with radially arranged fluorescence-exciting regions and laser-reflecting regions. This two-dimensional arrangement allows multiple optical paths to be integrated in a compact plane, maintaining efficient light collection and combination without requiring large vertical or horizontal space
3Ease of manufacture
If the laser source structure is simplified to reduce cost, then the cost decreases, but the ability to combine laser and fluorescent beams efficiently may be affected
Solution Approach 1:
The phosphor wheel is segmented into distinct fluorescence-exciting regions and laser-reflecting regions, allowing each region to be independently optimized. The combining component is also segmented into alternating light reflecting and laser transmitting regions. This segmentation enables efficient beam combination through a relatively simple structure that can be manufactured cost-effectively
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 enables the miniaturization of the laser projection apparatus while maintaining high optical efficiency, reducing volume and cost, and ensuring effective illumination by combining the laser and fluorescent beams efficiently.
Implementation Method 1
a light-emitting assembly 101, a phosphor wheel 103, a converging lens group 105 and a combining component 102. The light-emitting assembly 101 is configured to emit a laser beam
Implementation Method 2
The fluorescence-exciting region is configured to emit a fluorescent beam with a color different from a color of the laser beam under excitation of the laser beam emitted by the light-emitting assembly
Implementation Method 3
the laser-reflecting region is configured to reflect the laser beam emitted by the light-emitting assembly
Implementation Method 4
The converging lens group is disposed between the light-emitting assembly and the phosphor wheel, and is configured to converge the laser beam emitted by the light-emitting assembly to the phosphor wheel
Data Source
AI summary
A laser source includes a light-emitting assembly, a phosphor wheel, a converging lens group, and a combining component. The combining component is disposed between the light-emitting assembly and the converging lens group. The combining component has a plurality of light reflecting regions and a plurality of laser transmitting regions, and the plurality of light reflecting regions and the plurality of laser transmitting regions are alternately arranged. The plurality of laser transmitting regions are configured to transmit the laser beam emitted by the light-emitting assembly, and the plurality of light reflecting regions are configured to reflect a laser beam reflected by the laser-reflecting region of the phosphor wheel and a fluorescent beam excited by the fluorescence-exciting region of the phosphor wheel toward a beam outlet of the laser source.