Illumination System Beam Combination for Laser Projector Brightness
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Solution Overview
Problem
Current laser projectors face challenges in achieving high brightness while minimizing cost and assembly time, as increasing brightness requires multiple light source modules, complicating the combination and design of light paths.
Innovation Solution
The proposed solution involves an illumination system with multiple light sources, a first and second light combining module, and a converging lens, where the light sources provide beams of the same wavelength range, and the modules are strategically positioned to combine these beams into an exciting beam, which is then converted and homogenized to improve brightness, reduce production costs, and streamline assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple light source modules are used to increase brightness, then the brightness of the projection system is improved, but the device complexity and assembly time increase
Solution Approach 1:
The patent combines multiple light sources (first light source and second light source) into a unified illumination system with integrated light path design. The first light combining module and second light combining module merge the light paths from both sources, allowing them to work together as a single system rather than separate modules, thereby reducing overall system complexity while maintaining high brightness output
Solution Approach 2:
The illumination system is designed so that the first light combining module and second light combining module can handle both the first beam from the first light source and the second beam from the second light source. These modules serve multiple functions: combining beams, directing light paths, and preparing illumination for the projection system, thereby reducing the need for separate dedicated components for each light source
2Illumination intensity
If multiple light source modules are used to increase brightness, then the brightness of the projection system is improved, but the assembly time and production costs increase
Solution Approach 1:
The patent integrates the first light combining module and second light combining module into a unified structure where both modules work together in a coordinated manner. This merged design allows for simultaneous alignment and adjustment during assembly, reducing the total assembly time compared to separately assembling and integrating multiple independent light source modules
Solution Approach 2:
The first light combining module and second light combining module are pre-configured with their respective light paths and beam combination mechanisms before final integration. This preliminary preparation of the illumination system allows for faster final assembly and reduces on-site adjustment time, thereby decreasing overall assembly time and production costs
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 enhances the brightness of the system, reduces production costs, and improves manufacturing efficiency by using a single optical substrate with different coating methods for the combining modules, allowing for efficient beam combination and projection.
Implementation Method 1
a first light combining module and a second light combining module to combine the beams into an exciting beam
Implementation Method 2
the beams are beams with the same wavelength range. The first light combining module is disposed on a transmission path of a portion of the beams
Implementation Method 3
The wavelength conversion element is configured to reflect the exciting beam at a first time interval, and convert the exciting beam into a converted beam at a second time interval
Implementation Method 4
The converging lens is disposed on a transmission path of the exciting beam
Data Source
AI summary
An illumination system including multiple light sources, a first light combining module, a second light combining module, and a converging lens is provided. The light sources respectively provide multiple beams with the same wavelength range. The first light combining module is disposed on a transmission path of a portion of the beams. The second light combining module is disposed on a transmission path of another portion of the beams to combine the beams into an exciting beam. The converging lens is disposed on a transmission path of the exciting beam.