Projection Light Source Module With Time-Division Laser Splitting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection display systems require multiple light sources for primary colors, leading to inefficiencies and increased costs, while existing solutions fail to optimize laser utilization and synchronization.
Innovation Solution
A light source module utilizing a first light source assembly, a time-sharing light splitter, and a fluorescence generator to provide primary lights in a time-sharing manner, enhancing laser utilization and reducing the need for multiple light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light sources are used for primary colors, then color display capability is improved, but system complexity and cost increase
Solution Approach 1:
The patent combines multiple light sources (blue laser, green laser, red light source) into a single integrated light source assembly that outputs multiple primary colors simultaneously. This merging approach maintains full color display capability while reducing system complexity by consolidating what would otherwise be separate light source systems into one unified module.
Solution Approach 2:
The light source assembly is designed as a universal module that can provide all three primary colors (blue, green, red) through a single device. The blue laser can directly output blue light or excite phosphors to generate green and red light, making the single light source assembly multi-functional and capable of replacing multiple separate light sources.
2Adaptability or versatility
If multiple light sources are used for primary colors, then color display capability is improved, but cost increases
Solution Approach 1:
By merging multiple light source functions into one assembly, the patent reduces the total number of components that need to be manufactured and assembled. The integrated design allows for simplified manufacturing processes and reduced material costs compared to implementing separate light source systems for each primary color.
Solution Approach 2:
The universal light source assembly that can generate multiple primary colors from a single device reduces overall system cost by eliminating the need for multiple specialized light sources. The multi-functional design optimizes resource utilization and reduces manufacturing complexity.
3Illumination intensity
If laser light sources are used, then brightness and color saturation are improved, but laser utilization efficiency decreases
Solution Approach 1:
The patent employs time-sharing control where the blue laser alternates between directly illuminating the screen and exciting phosphor materials. During different time intervals, the blue laser serves different functions, optimizing its utilization by preventing waste during transitions and ensuring maximum efficiency during both direct illumination and phosphor excitation phases.
Solution Approach 2:
The system recovers and utilizes the blue laser light that would otherwise be wasted during phosphor excitation by redirecting it to illuminate the screen. This recovery mechanism ensures that the high-energy blue laser is productively used in both modes, maximizing laser utilization efficiency while maintaining brightness and color saturation.
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
Improves projection efficiency, reduces costs, and ensures high brightness, color gamut, and color saturation by optimizing the use of laser light sources.
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
AI summary
A light source module includes a first light source assembly, a time-division optical splitter and a fluorescence generator. The first light source assembly is used for providing first primary-color light, and the first primary-color light is laser; the time-division optical splitter 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 for transmitting the first primary-color light to a second light-emergent channel within a second illumination time period, for transmission to the fluorescence generator, wherein the first illumination time period and the second illumination time period are different time periods; and the fluorescence generator is used for generating second primary-color light under the excitation of the first primary-color light, for output as the illumination beam.