Projection Light Source Layout for Uniform Laser Wavelength Conversion
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Solution Overview
Problem
Existing laser light sources suffer from non-uniform light intensity distribution and angular distribution, leading to reduced light uniformity and efficiency in projection devices.
Innovation Solution
A light source device comprising a first light source module, a set of converging lenses, a light-homogenization component, and a light-combination device, which converges and homogenizes the light beam, with a wavelength conversion device to generate excited light, reducing the area required for light combination and improving uniformity and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a liquid cooling plate is used to cool the light source, then the light source can be cooled effectively, but the overall device size increases and alignment becomes more difficult
Solution Approach 1:
The light source is nested within the liquid cooling plate structure, with the cooling plate forming an integrated part of the light source assembly. This nesting approach allows the cooling function to be incorporated without significantly increasing the overall device volume.
Solution Approach 2:
The light source and liquid cooling plate are merged into a single integrated assembly, where the cooling plate serves dual purposes: optical support and thermal management. This merging eliminates the need for separate cooling components and reduces overall device size.
2Temperature
If a liquid cooling plate is used to cool the light source, then cooling effectiveness is improved, but alignment difficulty increases
Solution Approach 1:
By merging the light source and cooling plate into a single integrated assembly, the patent eliminates the alignment interface between separate components. The light source is positioned within the cooling plate structure, removing the need for precise alignment operations.
3Volume of moving object
If the light source structure is made more compact, then device size is reduced, but heat dissipation capability deteriorates
Solution Approach 1:
The light source is nested within the liquid cooling plate, allowing compact integration while maintaining effective heat dissipation pathways. The nested structure enables close thermal contact between the light source and cooling plate without increasing overall volume.
Solution Approach 2:
The liquid cooling plate acts as an intermediary thermal management system that directly contacts the light source, providing efficient heat transfer in a compact configuration. This intermediary structure enables effective cooling without requiring large thermal mass.
4Temperature
If conventional cooling methods are used, then the light source can be cooled, but the projection apparatus becomes bulky and alignment is difficult
Solution Approach 1:
The patent merges the light source and liquid cooling plate into a single integrated assembly, eliminating the need for separate cooling systems and reducing overall apparatus complexity. This integration simplifies the projection apparatus structure while maintaining effective cooling.
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 enhances light uniformity and efficiency, resulting in improved image quality and performance of projection devices.
Implementation Method 1
a light source device and a projection apparatus according to one embodiment, a liquid cooling plate is used as a support structure for the light source, thereby the light source can be cooled
Implementation Method 2
a light source device and a projection apparatus according to one embodiment
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A light source device and projection apparatus comprise: a first light source module (1, 1'), a lens assembly (2, 2'), a first light homogenizing member (3, 3'), a first light combining device (4, 4'), and a wavelength conversion device (5). The first light source module (1, 1') is configured to emit a first light beam having a first wavelength. The lens assembly (2, 2') and the first light homogenizing member (3, 3') are located on a transmission path of the first light beam. The lens assembly (2, 2') is configured to converge the first light beam, and the first light homogenizing member (3, 3') is configured to homogenize the first light beam. A second light beam formed by the homogenization enters the first light combining device (4, 4'). The first light combining device (4, 4') is located at a focus position of the lens assembly (2, 2'). The wavelength conversion device (5) is located in a transmission path of a third light beam emitted by the first light combining device (4, 4') and is configured to be excited to generate excitation light having a second wavelength. The area of a region required for expanding discrete light in the first light combining device (4, 4') is reduced, improving uniformity and efficiency of the system.