Optical Engine Module with Dual Light Source Mixing
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Solution Overview
Problem
Current optical projectors using fluorescent light face issues with low light utilization rates, leading to reduced efficiency and increased waste heat, which affects the performance of the fluorescent wheel.
Innovation Solution
An optical engine module comprising a first light source module with solid state light emitters for different colors and a second light source module for fluorescent light, controlled by a controller to mix colors and fluorescent light to produce white light, utilizing a band-pass filter element and wavelength conversion material to enhance light mixing and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fluorescent light is used to obtain various color lights, then the projector can display full-color images, but the light utilization rate decreases and waste heat increases
Solution Approach 1:
The patent divides the light source system into two independent modules: a first light source module with solid state light emitters for generating color lights, and a second light source module for generating fluorescent light. This segmentation allows selective operation of each module based on display requirements, improving overall light utilization efficiency while maintaining color display capability.
Solution Approach 2:
The controller dynamically switches between different light emitting modes: using only the first light source module for color display, using only the second light source module for brightness-critical scenarios, or combining both modules. This dynamic adaptation optimizes light utilization rate according to real-time display needs while reducing waste heat generation.
2Manufacturing precision
If the color filter meets specifications for pure colors, then color accuracy improves, but the light utilization rate decreases
Solution Approach 1:
The patent changes the light source parameters by using solid state light emitters with specific emission spectra that naturally provide pure colors without requiring aggressive color filtering. The solid state light emitters are configured to emit different color lights with narrow bandwidths, achieving high color purity while minimizing light loss since less filtering is needed.
3Loss of energy
If light utilization rate decreases, then more light is converted to waste heat, but the fluorescent wheel efficiency is reduced
Solution Approach 1:
The patent extracts the fluorescent light generation function into a separate second light source module that can be independently controlled. This allows the system to take out the fluorescent wheel from the high-heat generation path by selectively operating the second module only when fluorescent light is needed, reducing overall waste heat generation and protecting the fluorescent wheel from excessive thermal stress.
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 increases brightness by 25-30% and improves efficiency by 5-6% compared to traditional systems, while maintaining high chroma and reducing waste heat, thereby optimizing the performance of the projector.
Implementation Method 1
The solid state light emitters are laser diodes and respectively have different light-emitting spectra
Implementation Method 2
The wavelength conversion material is configured to convert light emitted by the light-emitting unit into the fluorescent light
Implementation Method 3
The band-pass filter element has a reflection spectrum. The reflection spectrum is located between adjacent two of the light-emitting spectra
Data Source
AI summary
An optical engine module includes a first light source module, a second light source module, and a controller. The first light source module includes a plurality of solid state light emitters. The solid state light emitters are configured to respectively emit different color lights. The second light source module is configured to emit fluorescent light. The controller is configured to: drive the first light source module in a first light emitting mode, in which the color lights are configured to be mixed to produce a first white light; and drive the first light source module and the second light source module in a second light emitting mode, in which the color lights and the fluorescent light are configured to be mixed to produce a second white light.