Multi-Array Light Source System for Miniaturized Projectors
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Solution Overview
Problem
Conventional solid-state light sources for projectors, such as LEDs and lasers, face challenges in providing adequate brightness while minimizing volume, making them less suitable for miniaturized projector applications.
Innovation Solution
A light source system comprising multiple laser arrays with a specifically designed structure, including first, second, and third optical modules, which integrate blue, red, and green laser beams along a main optical axis to enhance brightness while reducing volume, utilizing mirror arrays and dichroic mirrors to redirect and combine beams effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional solid-state light sources (LEDs and lasers) are used in projectors, then service life and response speed are improved, but image brightness deteriorates due to low lumen output
Solution Approach 1:
The patent combines multiple laser arrays (first laser array, second laser array, third laser array) into a unified light source system. Each laser array targets a specific color range (blue, green, red), and their outputs are merged through optical modules to achieve high overall brightness while maintaining the reliability advantages of solid-state lasers
Solution Approach 2:
The light source system is segmented into multiple specialized laser arrays, each optimized for specific color wavelengths. This segmentation allows each component to operate at peak efficiency for its designated function while collectively achieving high brightness across the full visible spectrum
2Illumination intensity
If solid-state light sources are used to achieve high brightness, then luminance is improved, but device volume increases making miniaturization difficult
Solution Approach 1:
The optical modules are designed with nested structures where mirrors, lenses, and beam combining elements are arranged in compact, space-efficient configurations. The multiple laser arrays and their associated optical components are integrated in a nested manner that minimizes overall system volume while maintaining high luminance output
Solution Approach 2:
The patent utilizes three-dimensional spatial arrangement of optical components, employing vertical stacking and angular beam routing to achieve high brightness in a compact footprint. The optical paths are arranged in multiple dimensions rather than simple linear sequences, enabling miniaturization
3Illumination intensity
If multiple laser arrays are integrated to improve brightness, then luminance is improved, but system complexity increases
Solution Approach 1:
The optical modules serve multiple functions simultaneously: they guide beams from different laser arrays, perform wavelength-specific routing, combine multiple color channels, and focus outputs. This multi-functionality reduces the need for separate dedicated components for each function, thereby managing complexity while achieving high luminance
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
The system achieves improved brightness and reduced volume, making it more suitable for miniaturized projectors by effectively integrating and redirecting laser beams, thereby enhancing the light source's performance.
Implementation Method 1
The at least one first optical module comprises a first light source array and a second light source array adapted to emit a plurality of first beams and a plurality of second beams respectively
Implementation Method 2
The at least one second optical module comprises a third light source array adapted to emit a plurality of third beams
Implementation Method 3
The third optical module is adapted to integrate the first beams, the second beams and the third beams into a main beam for projection along the main optical axis
Data Source
AI summary
A light source system for use in a projector is provided. The light source system comprises a main optical axis, a first sub-optical axis, a second sub-optical axis, at least one first optical module, at least one second optical module and a third optical module. The at least one first optical module comprises a first light source array and a second light source array for emitting a plurality of first beams and a plurality of second beams respectively. The at least one second optical module comprises a third light source array for emitting a plurality of third beams. The third optical module integrates the first beams, the second beams and the third beams into a main beam for projection along the main optical axis.