Wavelength Conversion Device with Periodic Rotation for Light Utilization
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Solution Overview
Problem
Existing light source systems suffer from low light utilization rates and uneven light emission due to losses at the regional coating, leading to inadequate brightness and color uniformity.
Innovation Solution
A light source system with a wavelength conversion device having a conversion region and a reflective region that periodically moves on the optical path, allowing the excited light and exciting light to be collected and guided with non-coincident optical axes, and a distance adjustment mechanism to optimize brightness and color coordinates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a region light-splitting sheet with blue-transmitting and yellow-reflecting regional coating is used, then the light source system can separate blue exciting light and yellow excited light, but the blue exciting light is lost due to transmission at the regional coating, resulting in low light utilization rate
Solution Approach 1:
The wavelength conversion device periodically rotates to alternately present the conversion region and reflective region to the incident light, enabling time-division multiplexing of light conversion and reflection functions, thereby improving light utilization by recovering previously lost blue light
Solution Approach 2:
The reflective region recovers the blue exciting light that would otherwise be lost through the regional coating, redirecting it back into the optical path to be utilized for generating additional excited light, thus recovering wasted energy
2Illumination intensity
If the blue exciting light is transmitted through the regional coating of the region light-splitting sheet, then the light can reach the wavelength conversion device, but the transmitted blue exciting light is lost, causing uneven color distribution in the emitted light
Solution Approach 1:
The periodic rotation of the wavelength conversion device creates time-division multiplexing where the reflective region returns blue light to the optical path, ensuring uniform color distribution by compensating for regional variations in light transmission
Solution Approach 2:
The reflective region provides feedback by redirecting transmitted blue light back into the optical path, creating a self-correcting mechanism that maintains color uniformity across the emitted light
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 enhances light utilization rates and improves the uniformity of emitted light, ensuring better user experience by adjusting the distance between the collection system and the wavelength conversion device to meet preset conditions.
Implementation Method 1
the conversion region is configured to convert the exciting light into excited light and emit the exited light
Implementation Method 2
the reflective region is configured to reflect the exciting light and then emit the exciting light
Data Source
AI summary
A light source system includes an exciting light source, a collection system, a wavelength conversion device, a relay system, an optical-mechanical system, a detection device, and a distance adjustment device. The exciting light source emits exciting light. The conversion region converts the exciting light into excited light. Optical axes of the excited light and the exciting light that are emitted from the wavelength conversion device do not coincide with each other. The excited light and exciting light collected by the collection system are guided to the optical-mechanical system via the relay system. The detection device detects information on brightness and/or color coordinates of the light emitted from the optical-mechanical system. The distance adjustment device adjusts a distance between the collection system and the wavelength conversion device in such a manner that the brightness and/or color coordinates of the light emitted from the optical-mechanical system meet a preset condition.