Light Deflection Diffusion Element for Projection Overheating
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Solution Overview
Problem
Existing projection devices face issues with overheating of optical elements due to concentrated light spots, leading to potential burning and increased production costs from requiring larger optical elements for beam diffusion.
Innovation Solution
Incorporating a light deflection and diffusion element with inclined surfaces to deflect and diffuse excitation light beams, reducing energy density on optical elements and allowing for a smaller condenser lens, thus preventing overheating and lowering production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a beam diffusion element is added to diffuse the excitation light beam, then the energy density of the excitation light beam is reduced, but the size of optical elements (such as condenser lens) must be increased
Solution Approach 1:
The light deflection and diffusion element is divided into multiple inclined surfaces (first inclined surface, second inclined surface, third inclined surface, fourth inclined surface) with different normal directions. Each inclined surface deflects light beams from different directions toward the central axis, achieving segmentation of the light diffusion function while maintaining a compact structure.
Solution Approach 2:
The light deflection and diffusion element utilizes three-dimensional spatial arrangement of inclined surfaces with different orientations. By arranging inclined surfaces in multiple dimensions with different normal directions, the element achieves comprehensive light deflection and diffusion in three-dimensional space, reducing the need for larger optical elements.
2Illumination intensity
If the light spot formed on each optical element is overly concentrated, then the brightness of the projection device is improved, but the optical element may be burned due to overly high temperature
Solution Approach 1:
Different inclined surfaces have different normal directions tailored to deflect specific light beams from different incident directions. For example, the first inclined surface has a first normal direction for deflecting first light beams, while the second inclined surface has a second normal direction for deflecting second light beams. This localized optimization ensures uniform light distribution while preventing localized overheating.
Solution Approach 2:
The light deflection and diffusion element acts as an intermediary component between the light source module and the wavelength conversion element. It intercepts and redistributes the excitation light beams before they reach the wavelength conversion element, preventing direct concentrated heating while maintaining effective illumination for wavelength conversion.
3Reliability
If a light deflection and diffusion element is added to diffuse the light spot, then the risk of burning optical element is reduced, but the production cost of the projection device is increased
Solution Approach 1:
The light deflection and diffusion element performs multiple functions simultaneously: it deflects light beams from different directions toward the central axis, diffuses the excitation light beam to reduce energy density, and enables the use of a smaller condenser lens. By consolidating these functions into a single element, the overall system complexity and production cost are reduced compared to using separate components.
Solution Approach 2:
The patent combines the light deflection function and light diffusion function into a single integrated light deflection and diffusion element. This merging eliminates the need for separate deflection and diffusion components, simplifying the optical system structure and reducing production costs while maintaining the reliability benefits of light diffusion.
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 effectively diffuses light spots on optical elements, preventing overheating and improving brightness while reducing the size and cost of optical components in projection devices.
Implementation Method 1
The light deflection and diffusion element includes a plurality of inclined surfaces. Each inclined surface has a different normal direction. The inclined surface is configured to deflect the excitation light beam toward the central axis of the light deflection and diffusion element.
Implementation Method 2
The wavelength conversion element is disposed on the transmission path of the excitation light beam from the light deflection and diffusion element and is configured to convert the excitation light beam from the light source module into a conversion light beam
Data Source
AI summary
The disclosure provides an illumination system including a light source module and a light deflection and diffusion element. The light source module is configured to emit at least one excitation light beam. The light deflection and diffusion element is disposed on a transmission path of the excitation light beam. The light deflection and diffusion element has a central axis. The light deflection and diffusion element includes a plurality of inclined surfaces. Each inclined surface has a different normal direction. The inclined surface is configured to deflect the excitation light beam toward the central axis of the light deflection and diffusion element. The disclosure also provides a projection device including the illumination system.