Light Mixing Module Using Polarized Fold Mirrors
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Solution Overview
Problem
Conventional multi-color laser projectors face challenges in achieving optimal color reproduction and brightness while maintaining a compact design, as they rely on a single large condenser for light mixing, which limits their efficiency and volume reduction potential.
Innovation Solution
The proposed solution involves a light mixing module with two or more laser arrays and laser polarized fold mirrors that reflect and combine polarized light beams from different directions, allowing for a smaller condenser to be used and potentially increasing brightness with three laser arrays, thereby reducing the module's volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a single large condenser is used for light mixing, then color reproduction can be achieved, but the module volume increases and brightness efficiency decreases
Solution Approach 1:
The patent divides the light mixing system into multiple separate condensers (first condenser and second condenser) instead of using a single large condenser. Each condenser handles light from specific laser arrays, enabling modular light mixing that reduces overall module volume while maintaining mixing effectiveness
Solution Approach 2:
The patent introduces polarized fold mirrors to direct light beams from different directions (different spatial dimensions) into the condensers. This dimensional approach allows efficient light mixing from multiple laser arrays without requiring a single large condenser, thereby reducing module volume while maintaining brightness
2Ease of manufacture
If a single large condenser is used for light mixing, then light mixing can be achieved, but device complexity and maintenance difficulty increase
Solution Approach 1:
The light mixing system is segmented into multiple independent condensers and associated optical components. This segmentation allows each condenser to be independently assembled, tested, and replaced, significantly simplifying manufacturing assembly processes and reducing maintenance complexity compared to a single integrated large condenser system
Solution Approach 2:
The patent employs polarized fold mirrors that can handle multiple light beams from different directions and direct them through a unified optical path. This multi-functional component reduces the number of separate optical elements needed, thereby simplifying the overall device structure and easing both manufacturing and maintenance
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 design enhances color reproduction and brightness while minimizing the light mixing module's volume, offering a more efficient and compact solution for multi-color laser projectors.
Implementation Method 1
The one or more laser polarized fold mirrors reflect the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array
Data Source
AI summary
A light mixing module is provided. The light mixing module includes a first laser array, a second laser array, and one or more laser polarized fold mirrors. The first laser array is configured for emitting a plurality of polarized light beams having a first polarization state. The second array is configured for emitting a plurality of polarized light beams having the first polarization state. The second laser array is disposed opposite to the first laser array. The one or more laser polarized fold mirrors are disposed between the first laser array and the second laser array. The one or more laser polarized fold mirrors reflect the polarized light beams emitted by the first laser array and the polarized light beams emitted by the second laser array. Each one of the one or more laser polarized fold mirrors is configured to direct light beams from at least two different directions.