Laser Projector Polarization Splitting and Phosphor Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing laser projectors with blue light relay structures have complex manufacturing processes and high noise levels due to the need for multiple color blocks and reflectors in the phosphor wheel, complicating the optical design and heat dissipation.
Innovation Solution
A laser projector design that uses two dichroic mirrors and a half-wave plate to split polarized blue light, reducing the number of reflectors and employing a single-color phosphor wheel with improved heat dissipation through distinct blue light transmission paths and a simplified phosphor wheel module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a blue light relay structure with multiple color blocks and reflectors is used in the phosphor wheel, then the laser projector can provide light in various colors, but the manufacturing process becomes complex and noise level increases
Solution Approach 1:
The patent extracts the color separation function from the complex multi-color phosphor wheel design and implements it through a simplified single-color phosphor wheel combined with a dichroic mirror. The dichroic mirror handles the color splitting function that previously required multiple phosphor blocks and reflectors, thereby simplifying the manufacturing process while maintaining the capability to provide various colors.
Solution Approach 2:
The patent segments the light path into distinct channels using a dichroic mirror, separating blue light transmission from other color light reflection. This segmentation allows the use of a simple single-color phosphor wheel while achieving multi-color output through optical path division, reducing manufacturing complexity.
2Adaptability or versatility
If multiple reflectors and color blocks are arranged on the phosphor wheel, then various colors can be projected, but the optical design becomes complicated and heat dissipation is impaired
Solution Approach 1:
The patent removes the complex arrangement of multiple reflectors and color blocks from the phosphor wheel design. By extracting the color separation function and assigning it to a dichroic mirror in the optical path, the phosphor wheel itself is simplified to a single-color design, improving heat dissipation while maintaining multi-color projection capability.
3Measurement precision
If a complex phosphor wheel design with multiple components is used, then color accuracy can be maintained, but the number of optical components increases
Solution Approach 1:
The patent merges the color separation function into the optical path using a dichroic mirror, combining what previously required multiple separate phosphor blocks and reflectors into a single optical component. This reduces the total number of optical components while maintaining color accuracy through the dichroic mirror's precise wavelength-selective reflection and transmission properties.
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 design reduces optical components, simplifies the manufacturing process, decreases noise levels, and enhances heat dissipation, resulting in a more efficient and reliable laser projector with reduced complexity.
Implementation Method 1
the dichroic mirror 32 is designed to reflect blue laser beams and pass light in other colors
Implementation Method 2
when the laser beams are incident on the light-splitting module 30, the dichroic mirror 32 is configured to reflect blue laser beams to the phosphor wheel 36. When the blue laser beams impact the red block R, the green block G and the yellow block Y, red light, green light and yellow light may be respectively stimulated
Implementation Method 3
The half-wave plate is configured to receive the first polarized light after the first polarized light passes through the dichroic mirror and convert the first polarized light into third polarized light
Data Source
AI summary
A laser projector includes a light-mixing module and a light-splitting module. The light-mixing module provides a laser beam which includes first polarized light and second polarized light. The light-splitting module includes a dichroic mirror, a half-wave plate, a phosphor wheel module, and a light-guiding rod. The dichroic mirror allows the first polarized light to pass and reflects the second polarized light. The half-wave plate receives the first polarized light which passes the dichroic mirror and converts the first polarized light into third polarized light. The phosphor wheel module receives the second polarized light reflected by the dichroic mirror, and provides a stimulated light which passes the dichroic mirror. The light-guiding rod receives the stimulated light and the third polarized light, thereby providing an illumination beam.