Single Laser Light Source System for Projection Devices
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light source systems for projection and illumination using two independent laser light sources result in complex structures, large product sizes, and high costs, making it difficult to create miniature products.
Innovation Solution
A light source system where excitation light from a single laser light source is divided into two paths at a spectral filter unit, with the excitation light and excited light being merged, simplifying the optical path structure and utilizing polarization principles to split and combine light components effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two independent laser light sources are used to generate blue light and yellow fluorescent light separately, then the light source system can achieve stable white light output, but the system structure becomes overly complicated and the product size increases
Solution Approach 1:
The patent merges the functions of two independent light sources into a single laser light source system. The laser light source generates blue light that is split into two paths: one path directly transmits blue light, while the other path excites yellow phosphor to generate yellow fluorescent light. These two paths are then combined to produce white light, eliminating the need for two separate light sources and their associated optical systems.
Solution Approach 2:
The patent segments the optical path into two distinct paths after the light source: a first optical path for direct blue light transmission and a second optical path for yellow phosphor excitation. This segmentation allows independent optimization of each path while using a single unified light source, reducing overall system complexity while maintaining functional stability.
2Use of energy by moving object
If two independent light sources are adopted with separate optical paths, then sufficient blue light and yellow fluorescent light can be generated, but the arrangement of optical components becomes excessive and costs increase
Solution Approach 1:
The patent combines the optical paths of two independent light sources into a single integrated system. Instead of having separate optical components for two light sources, the design uses one laser light source with a single optical path that branches into two functional paths (direct transmission and phosphor excitation), then recombines them. This merging reduces the number of optical components and simplifies the overall arrangement.
Solution Approach 2:
The single laser light source performs multiple functions: it serves as both the direct blue light source and the excitation source for yellow phosphor. This multi-functionality eliminates the need for separate light sources and reduces the overall number of optical components required in the system.
3Device complexity
If a single laser light source is used with spectral filtering to divide excitation light into two paths, then the optical path structure is simplified and product size is reduced, but the system must effectively manage light distribution
Solution Approach 1:
The patent introduces a spectral filter as an intermediary component that divides the excitation light from the single laser source into two paths based on wavelength. The filter separates blue light (for direct transmission) from the longer wavelength components (for phosphor excitation), enabling effective light distribution control while maintaining a simplified optical path 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 approach simplifies the optical path design, reduces product size and cost, and enhances flexibility in achieving desired light proportions, with significant applications in beam illumination and 3LCD projection technology.
Implementation Method 1
a spectral filter unit, configured to divide the excitation light into two paths
Implementation Method 2
the blue laser excite the yellow phosphor phosphor to produce yellow fluorescent light
Implementation Method 3
emitted by merging the excitation light and the excited light
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A light source system, a projection device of same, and a lighting device thereof. The light source system comprises: an excitation light unit (301, 302, and 303), used for emitting an excitation light. A spectral filter unit (304) reflects a portion of the excitation light to a scattering unit (305 and 306). The scattering unit (305 and 306) scatters the light to produce a first light and a second light. The spectral filter unit (304) transmits the second light and transmits the other portion of the excitation light to an excited light unit (307 and 308).. Illuminated by same, the excited light unit (307 and 308) produces an excited light. The spectral filter unit (304) reflects the excited light, thus the spectral filter unit (304) merging and emitting the transmitted second light and the reflected excited light. Because only one excitation light source is employed, the design of an optical structure is greatly simplified.