Rotating Wheel Light Source for Compact Projector Systems
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light source systems for projectors have poor economic efficiency due to the need for multiple light sources corresponding to each wavelength conversion device.
Innovation Solution
A light source system that uses a single first light source to irradiate both the first and second wavelength conversion devices through a rotating wheel light path conversion element, allowing for efficient sharing of the light source and reducing heat dissipation pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple light sources are correspondingly disposed for multiple wavelength conversion devices, then each wavelength conversion device can be excited independently, but the economic efficiency of the light source system deteriorates
Solution Approach 1:
The patent merges multiple light source functions into a single light source by using a rotating wheel with multiple reflective surfaces. Each reflective surface directs the single light source to different wavelength conversion devices at different times, achieving the effect of multiple independent light sources while using only one physical light source, thus improving economic efficiency while maintaining independent excitation capability.
Solution Approach 2:
The patent introduces dynamic switching through a rotating wheel that continuously changes the optical path. The rotating wheel dynamically directs the single light source to different wavelength conversion devices in sequence, enabling time-division multiplexing that provides independent excitation capability without requiring multiple static light sources.
2Illumination intensity
If multiple light sources are used for multiple wavelength conversion devices, then each device receives adequate excitation light, but the system volume increases
Solution Approach 1:
The patent combines multiple light source functions into a single physical light source positioned outside the projection lens system. The rotating wheel with multiple reflective surfaces allows one light source to serve multiple wavelength conversion devices sequentially, significantly reducing the number of light sources from multiple to one, thus decreasing system volume while maintaining adequate excitation light for each device.
3Power
If multiple light sources are used for multiple wavelength conversion devices, then each device can operate at optimal power, but the heat dissipation pressure increases
Solution Approach 1:
The patent employs periodic action through the rotating wheel that sequentially directs the single light source to different wavelength conversion devices. Each device receives excitation light in periodic intervals rather than continuously, which allows for duty cycle control. This periodic operation enables each device to operate at optimal power levels during its active period while reducing overall heat accumulation and dissipation pressure on the system.
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 effectively reduces the volume of the system, disperses heat dissipation pressure, and allows for low-cost, high-power light source systems, while maintaining efficient light combination for projector applications.
Implementation Method 1
the light path conversion element is a rotating wheel that rotates around its own axis... under a condition that the rotating wheel is at the first working position, the excitation light emitted by the first light source irradiates the first wavelength conversion device after passing through the first transmission area; under a condition that the rotating wheel is at the second working position, the excitation light emitted by the first light source irradiates the second wavelength conversion device after being reflected by the first reflection area
Implementation Method 2
the first wavelength conversion device and the second wavelength conversion device both are monochromatic phosphor wheels... the excitation light emitted by the first light source irradiates the first wavelength conversion device, so as to excite and generate a first excited light; the excitation light emitted by the first light source irradiates the second wavelength conversion device, so as to excite and generate a second excited light
Implementation Method 3
the light combining unit is configured to combine the first excited light with the second excited light
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A light source system (200), comprising a first light source (10), a first wavelength conversion device (20), a second wavelength conversion device (30), a light path conversion element (40), and a light combining unit (50). The light path conversion element (40) is configured to make an excitation light emitted by the first light source (10) irradiate the first wavelength conversion device (20) and the second wavelength conversion device (30) in turn, so as to correspondingly excite and generate a first excited light and a second excited light. The light combining unit (50) is configured to combine the first excited light and the second excited light. The first wavelength conversion device (20) and the second wavelength conversion device (30) share the first light source (10), thus making the system compact, easy to cool, and inexpensive. A projector, comprising the light source system (200).