Illumination System Light Guide Module Wavelength Conversion
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Solution Overview
Problem
Existing illumination systems for projection devices are large in size and inefficient in light energy usage, failing to meet regulatory requirements for color temperature and brightness, especially in compact applications such as automotive illumination.
Innovation Solution
The illumination system comprises an excitation light source, a light guide module, a collimation lens group, and a wavelength conversion element, where the excitation light beam is guided toward the wavelength conversion element by total reflection, reducing the number of optical elements and simplifying the light path, thereby improving light energy usage efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If traditional illumination system components (light source module, focusing collimation module, light uniform element, light guide module) are used, then the system can provide adequate illumination, but the device size becomes large
Solution Approach 1:
The patent combines the light source module and light guide module into an integrated structure where the light guide module serves dual functions: guiding light from the source and performing wavelength conversion. This merging eliminates separate components for light generation and wavelength transformation, directly reducing device volume while maintaining illumination quality through the integrated design.
Solution Approach 2:
The light guide module is designed with multi-functionality, serving as both a light guiding element and a wavelength conversion element. By incorporating wavelength conversion particles directly into the light guide module, it performs multiple functions (light transmission, wavelength conversion, and uniformity distribution) that traditionally required separate components, thereby reducing overall device size.
2Illumination intensity
If more optical elements are added to improve color temperature and brightness compliance, then regulatory requirements are met, but light energy loss increases
Solution Approach 1:
The patent extracts the wavelength conversion function from separate optical elements and integrates it directly into the light guide module. This eliminates intermediate optical components that would cause additional light energy loss, while still achieving the required color temperature and brightness compliance through direct wavelength conversion at the source.
Solution Approach 2:
The light guide module acts as an intermediary that directly converts wavelength without requiring separate conversion elements in the light path. By serving as the mediator between light source and output, it performs wavelength conversion in-situ, minimizing the number of optical interfaces and reducing cumulative light energy loss while meeting regulatory requirements.
3Volume of moving object
If the number of optical elements is reduced to minimize device size, then device complexity decreases, but light energy usage efficiency may be compromised
Solution Approach 1:
The light guide module uses composite materials containing wavelength conversion particles embedded within the light guide material. This composite structure enables the single component to perform both light guiding and wavelength conversion functions efficiently, maintaining high light energy usage efficiency while reducing the total number of optical elements and minimizing device size.
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 reduces light energy loss, lowers system costs, and minimizes size while enhancing color performance and uniformity, enabling the system to meet specifications for color temperature and brightness.
Implementation Method 1
the excitation light beam is reflected by the light guide module
Implementation Method 2
another part of the excitation light beam is converted into a conversion light beam by the wavelength conversion element
Data Source
AI summary
An illumination system, configured to generate an illumination light beam, is provided. The illumination system includes an excitation light source configured to emit an excitation light beam and a light guide module, a collimation lens group, and a wavelength conversion element disposed on a transmission path of the excitation light beam. After being emitted from the excitation light source, the excitation light beam is reflected by the light guide module, passes through the collimation lens group, and is transmitted to the wavelength conversion element. A part of the excitation light beam is reflected by the wavelength conversion element, and passes through the collimation lens group and the light guide module. Another part of the excitation light beam is converted into a conversion light beam by the wavelength conversion element. The conversion light beam passes through the collimation lens group and the light guide module. A projection device is also provided.