Light Source System With Conjugated Focal Points
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Solution Overview
Problem
Conventional projector systems are bulky and costly due to the need for a collimating lens and dichroic mirror, and they face issues with heat dissipation and light utilization efficiency.
Innovation Solution
A light source system comprising a fluorescent wheel, a color wheel, and light reflectors with a reflective curved surface having conjugated focal points, which simplifies the optical path, reduces costs, and allows for effective heat dissipation by eliminating the need for a collimating lens and dichroic mirror, and improves light utilization by reflecting unconverted light back to the fluorescent wheel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a collimating lens and dichroic mirror are used to divide different colored lights, then the optical path can be established, but the optical system becomes bulky and the cost increases
Solution Approach 1:
The patent removes the collimating lens and dichroic mirror from the optical system, extracting these unnecessary components while maintaining the optical path functionality through an alternative design using a light source module with integrated wavelength conversion elements
Solution Approach 2:
The patent combines the light source, wavelength conversion elements (fluorescent wheel and color wheel), and optical path into an integrated light source module, eliminating the need for separate collimating lens and dichroic mirror components
2Reliability
If a collimating lens is used in the optical path, then light transmission can be achieved, but the lens may overheat and break due to multiple directions of light transmission
Solution Approach 1:
The patent removes the collimating lens from the system, eliminating the component that would overheat while maintaining light transmission functionality through direct emission from the light source module
Solution Approach 2:
The patent replaces the collimating lens function with an integrated light source module design that achieves similar light transmission results without the thermal problems of traditional lens-based systems
3Reliability
If the fluorescent wheel is sandwiched between two lenses for receiving light, then light reception can be achieved, but heat dissipation becomes difficult due to narrow space between lenses
Solution Approach 1:
The patent removes the two lenses that sandwich the fluorescent wheel, eliminating the narrow space constraint while maintaining light reception through the integrated light source module design
Solution Approach 2:
The patent segments the light reception function into the light source module with integrated wavelength conversion elements, allowing the fluorescent wheel to be positioned without the constraint of being sandwiched between lenses, thereby improving heat dissipation
4Reliability
If conventional optical components are used, then the optical path can be established, but the cost increases due to the number of optical components
Solution Approach 1:
The patent combines multiple optical functions (light emission, wavelength conversion, color separation) into a single integrated light source module, reducing the total number of optical components while maintaining optical path functionality
Solution Approach 2:
The light source module performs multiple functions simultaneously: emitting light, converting wavelengths through fluorescent and color wheels, and directing the optical path, replacing what would traditionally require multiple separate components
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 achieves a simpler optical path, reduces costs, and enhances light utilization and heat dissipation, leading to a more efficient and cost-effective light source system for projectors.
Implementation Method 1
the reflective curved surface of the light reflector has a first focal point and a second focal point conjugated to each other... various colored lights (including the light emitted by the light source module and the light converted by the fluorescent wheel) are reflected by the reflective curved surface of the light reflector to the color wheel
Implementation Method 2
the wavelength conversion material on the fluorescent wheel absorbs light of a specific wavelength, the internal electrons will transition from the ground state to the excited state, and then energy will be released by means of radiation such as photons and phonons
Implementation Method 3
the wavelength conversion material on the fluorescent wheel absorbs light of a specific wavelength
Implementation Method 4
The light source module is configured to emit light to the first focal point
Data Source
AI summary
A light source system includes a fluorescent wheel, a color wheel, at least one light reflector, and a light source module. The fluorescent wheel includes at least one fluorescent section. The color wheel includes a filter portion. The light reflector has a reflective curved surface having a first focal point and a second focal point conjugated to each other. The first focal point is located on a rotation path of the fluorescent section. The second focal point is located on a rotation path of the filter portion. The light source module is configured to emit light to the first focal point.