Annular Wavelength Conversion Layer on Reflecting Plate for Compact Projector
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Solution Overview
Problem
Conventional laser projectors have a high hardware cost and are heavy due to the large number of optical components in their alignment modules, which is inefficient and not conducive to compact designs.
Innovation Solution
A projector design featuring a light source, collimator lens with divided portions, a wavelength conversion module with a reflecting plate and annular wavelength conversion layer, and a dichroic filter that reflects and polarizes beams to minimize components and optimize alignment within a constrained space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional alignment module uses dichroic component to reflect illumination beam toward color wheel with multiple optical components, then beam alignment function is achieved, but hardware cost increases and weight increases
Solution Approach 1:
The patent combines the wavelength conversion layer and reflecting plate into a single integrated module. The wavelength conversion layer is directly formed on the reflecting plate, eliminating the need for separate alignment components. This merging reduces the number of optical components while maintaining the beam alignment function through the coordinated design of the integrated module with the dichroic filter.
Solution Approach 2:
The integrated wavelength conversion module serves multiple functions: it converts wavelength, reflects light, and maintains beam alignment. The collimator lens also performs dual functions by having its first portion receive reflected light and second portion receive excited light, reducing the need for separate alignment components.
2Ease of operation
If conventional alignment module uses multiple optical components for beam mixing, then beam alignment function is achieved, but weight increases
Solution Approach 1:
The patent merges the wavelength conversion layer and reflecting plate into one integrated module, significantly reducing the number of separate optical components. This consolidation directly reduces the overall weight of the projector while maintaining all necessary beam alignment and conversion functions.
3Device complexity
If wavelength conversion layer is disposed on reflecting plate to match dichroic filter, then component number is reduced, but alignment precision must be maintained
Solution Approach 1:
The patent divides the collimator lens into first and second portions with different functions. The first portion receives reflected light at a specific angle, while the second portion receives excited light. This local differentiation allows the integrated wavelength conversion module to maintain precise alignment by optimizing each region's optical path independently.
Solution Approach 2:
The dichroic filter acts as an intermediary that receives light from the integrated wavelength conversion module and directs it to the appropriate portions of the collimator lens. This intermediary component ensures precise alignment is maintained despite the reduced component count.
4Volume of moving object
If projector uses compact alignment module with fewer components, then space efficiency is improved, but cost-effectiveness must be maintained
Solution Approach 1:
The integrated wavelength conversion module combines multiple functions into fewer components, reducing the overall projector size and volume. The simplified component structure also reduces manufacturing complexity and cost, as fewer precision-aligned parts are needed compared to conventional multi-component alignment modules.
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 reduces the number of components and weight, enabling a more efficient and compact projector with improved alignment, allowing for cost-effective and space-efficient projection while maintaining image quality.
Implementation Method 1
The dichroic filter has a function of being passed by a first polarized state beam and reflecting a second polarized state beam
Implementation Method 2
a wavelength conversion layer, and the wavelength conversion layer is an annular structure disposed on the reflecting plate
Implementation Method 3
The first polarization component is disposed between the light source and the dichroic filter, and adapted to transform the first beam from the first polarized state beam into the second polarized state beam
Data Source
AI summary
A projector includes a light source, a collimator lens, a wavelength conversion module and a dichroic filter. The light source provides a first beam. The collimator lens has a first portion and a second portion. The wavelength conversion module includes a reflecting plate and a wavelength conversion layer. The wavelength conversion layer is an annular structure disposed on the reflecting plate. The dichroic filter corresponds to the first portion of the collimator lens. The dichroic filter reflects the first beam to project onto the reflecting plate and the wavelength conversion layer. A second beam reflected by the reflecting plate passes through the second portion of the collimator lens. A third beam excited by the wavelength conversion layer passes through the first portion and the second portion of the collimator lens and the dichroic filter.