Time-Sharing Laser Light Source Module for Simplified Color Projection
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Solution Overview
Problem
Existing projection display systems require multiple light sources for primary colors, leading to inefficiencies and increased costs, and synchronization challenges in color image projection.
Innovation Solution
A light source module utilizing a first light source assembly, a time-sharing light splitter, and a fluorescence generator to provide primary colors in a time-sharing manner, with the time-sharing light splitter directing light to different outlets for direct projection or excitation of fluorescence, and a second light source assembly for additional primary colors, optimizing laser utilization and reducing synchronization requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light sources are used to provide primary colors, then color image projection capability is achieved, but system complexity and cost increase
Solution Approach 1:
The patent combines multiple light source functions into a single laser light source by using a wavelength conversion element that converts part of the laser light to different wavelengths. This merging approach eliminates the need for multiple separate light sources while maintaining the capability to provide multiple primary colors for color image projection.
Solution Approach 2:
The single laser light source is designed to serve multiple functions by directing light through different optical paths - one path provides direct laser light while another path passes light through the wavelength conversion element to generate converted light. This multi-functionality allows one light source to replace what would traditionally require multiple light sources.
2Adaptability or versatility
If multiple light sources are used to provide primary colors, then color image projection capability is achieved, but unit brightness cost increases
Solution Approach 1:
The patent merges multiple light source requirements into a single laser light source system with a wavelength conversion element, reducing the total quantity of light source components needed while maintaining full color projection capability, thereby lowering unit brightness cost.
3Adaptability or versatility
If multiple light sources are used to provide primary colors, then color image projection capability is achieved, but synchronization difficulty increases
Solution Approach 1:
The patent merges multiple light source operations into a single laser light source that inherently provides coherent and synchronized light output. The wavelength conversion element processes this light without introducing synchronization issues, eliminating the complex synchronization requirements that would exist with multiple independent light sources.
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
Enhances laser utilization, reduces unit brightness cost, and ensures high brightness, color gamut, and color saturation while simplifying synchronization, thereby improving projection efficiency and image quality.
Implementation Method 1
the fluorescence generator is configured to generate second primary light under excitation of the first primary light so as to be output as an illumination light beam
Data Source
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AI summary
A light source module (10) and a projection device. The light source module (10) comprises a first light source assembly (100), a time-division optical splitter (110) and a fluorescence generator (120). The first light source assembly (100) is used for providing first primary-color light, and the first primary-color light is laser; the time-division optical splitter (110) is used for transmitting the first primary-color light to a first light-emergent channel within a first illumination time period, for output as an illumination beam, and transmitting the first primary-color light to a second light-emergent channel within a second illumination time period, for transmission to the fluorescence generator (120), wherein the first illumination time period and the second illumination time period are different time periods; and the fluorescence generator (120) is used for generating second primary-color light under the excitation of the first primary-color light, for output as the illumination beam.