Multiband Filter Light Source System for Stereoscopic Projectors
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Solution Overview
Problem
Conventional light source systems for stereoscopic image projectors have a large volume due to a large color wheel diameter, resulting in significant light loss and the inability to output multiple light beams of different wavebands simultaneously.
Innovation Solution
A light source system comprising a first and second multiband filter, relay lens assemblies, a light source module, and a light valve device with a transmission and reflection area, allowing for the simultaneous output of multiple light beams of different wavebands by using relay lens assemblies to reduce light loss and enable smaller system dimensions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a large diameter color wheel is used to reduce light loss, then light beam utilization is improved, but system volume increases
Solution Approach 1:
The color wheel is divided into multiple independent filter regions (red, green, blue, cyan, yellow, magenta) that can be independently optimized. This segmentation allows each region to be smaller while maintaining overall filtering functionality, reducing the required diameter and system volume while minimizing light loss through optimized light path geometry for each segment.
Solution Approach 2:
The patent transitions from a conventional single-plane color wheel to a multi-dimensional optical path arrangement with filter regions positioned at different spatial locations and angles. This dimensional reorganization allows compact packaging of filter regions, reducing the overall system volume while maintaining effective light beam utilization through optimized three-dimensional light path geometry.
2Adaptability or versatility
If a conventional color wheel system is used, then system simplicity is maintained, but the ability to output multiple wavebands simultaneously is lost
Solution Approach 1:
The optical system is segmented into multiple independent light paths, each with dedicated filter regions and light modulators. This segmentation enables simultaneous processing of different wavebands through separate channels, providing multi-waveband output capability while keeping each individual path relatively simple and manageable.
Solution Approach 2:
The patent implements a universal optical architecture where multiple light modulators and filter regions share common structural elements and control mechanisms. This multi-functional design allows the system to handle multiple wavebands simultaneously while avoiding the complexity of completely separate independent systems, achieving versatility with controlled complexity.
3Productivity
If a conventional sequential light beam system is used, then device simplicity is maintained, but productivity is reduced
Solution Approach 1:
The patent implements continuous simultaneous operation of multiple light paths, where all filter regions and light modulators operate concurrently to produce multiple wavebands at the same time. This eliminates sequential processing delays and maximizes productivity, with the added complexity of multiple synchronized channels offset by the significant gain in output efficiency.
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 enables the generation of stereoscopic images with reduced light loss and smaller volume, allowing for simultaneous output of multiple wavebands, suitable for projectors with either multiple or single light modulators.
Implementation Method 1
a first relay lens assembly that is disposed between the first multiband filter and the second multiband filter, wherein the first relay lens assembly comprises an optical axis
Implementation Method 2
The first multiband filter and the second multiband filter are used for separating wavebands of a light beam
Implementation Method 3
a light valve device that is disposed between the first relay lens assembly and the second relay lens assembly and comprising a transmission and reflection area
Data Source
AI summary
A light source system for stereoscopic image is disclosed, which includes a first multiband filter, a second multiband filter, a first relay lens assembly, a second relay lens assembly, a light source module, a light outputting portion and a light valve device. The first and the second relay lens assemblies are disposed between the first multiband filter and the second multiband filter. The light source module and the first multiband filter are together disposed at one side of the first relay lens assembly. The light outputting portion and the second multiband filter are together disposed at one side of the second relay lens assembly. The light valve device is disposed between the first and the second relay lens assemblies. Therefore, the light source system configures the light path by controlling the light valve device and produces beams with different bands.