Light Source Module with Wavelength Conversion and Filter Wheel
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Solution Overview
Problem
Conventional projection apparatuses face challenges in achieving a broader color gamut while minimizing optical energy loss, particularly when using phosphor wheels and filter wheels to generate green light beams from blue light sources.
Innovation Solution
A light source module comprising a blue light source, a red light source, a wavelength conversion wheel, and a filter wheel, where the wavelength conversion wheel converts blue light into green light, and the filter wheel allows both green and red light beams to pass through separate bandwidths, reducing energy loss and enhancing color gamut.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a phosphor wheel and filter wheel are used to generate green light beams from blue light sources, then the color gamut can be improved, but optical energy loss increases
Solution Approach 1:
The filter wheel is divided into multiple filter regions, each with different spectral transmission characteristics. This segmentation allows selective filtering of light wavelengths, enabling the system to transmit green light efficiently while blocking other wavelengths, thus reducing overall energy loss while maintaining broad color gamut
Solution Approach 2:
Different regions of the filter wheel are designed with different optical properties tailored to specific wavelength requirements. Each filter region is optimized for its local function (transmitting specific color bands), which improves overall system efficiency by minimizing energy loss in each spectral region while collectively providing broad color coverage
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 solution enables a broader color gamut and reduces optical energy loss in projection apparatuses by effectively utilizing blue and red light sources with a wavelength conversion wheel and filter wheel configuration.
Implementation Method 1
The first wavelength conversion region is rotated onto the transmission path of the blue light beam. The blue light beam is converted by the first wavelength conversion region to generate a green light beam.
Implementation Method 2
The filter wheel includes a first filter region and a diffusion region. A filter spectrum of the first filter region includes a first bandwidth allowing the green light beam to pass through and a second bandwidth allowing the red light beam to pass through.
Data Source
AI summary
A light source module and a projection apparatus are provided. The light source module includes a blue light source, a red light source, a wavelength conversion wheel and a filter wheel. The blue light source provides a blue light beam. The red light source provides a red light beam. The wavelength conversion wheel is disposed on a transmission path of the blue light beam and has a wavelength conversion region. The blue light beam is converted into a green light beam by the wavelength conversion region. The filter wheel is disposed on transmission paths of the blue light beam and the red light beam. The filter wheel includes a filter region and a diffusion region. A filter spectrum of the filter region includes a first bandwidth and a second bandwidth. The first bandwidth and the second bandwidth are separated with each other.