Dual Solid-State Light Source Projector Thermal Management
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Projectors using a single solid-state light source face challenges in brightening the projection image due to thermal load issues, while those with three solid-state light sources struggle with stabilizing color balance due to differing light-emission efficiencies and temperature characteristics.
Innovation Solution
A projector design utilizing two solid-state light sources, where one emits excitation light and a fluorescent layer converts it into two color light components, and the other emits a third color light component, with a light modulation device and optical systems to stabilize color balance and reduce thermal load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single solid-state light source device is used to emit white light, then the device structure is simplified, but the thermal load on the light source increases and the projection image brightness cannot be further improved
Solution Approach 1:
The patent divides the single white light source into multiple separate solid-state light source devices, each emitting a specific color component (red, green, blue). This segmentation reduces the thermal load on each individual light source while maintaining the ability to generate all three color components, thereby improving projection image brightness without excessive thermal concentration.
Solution Approach 2:
The patent combines multiple solid-state light source devices (emitting different color components) to work together as a unified lighting system. By merging the outputs of red, green, and blue light source devices, the system achieves higher overall brightness and better color balance while distributing thermal load across multiple devices.
2Illumination intensity
If three solid-state light source devices emitting different color components are used, then the projection image brightness is improved, but the color balance becomes unstable due to different light-emission efficiencies and temperature characteristics
Solution Approach 1:
The patent adjusts the drive currents and emission intensities of each solid-state light source device to compensate for differences in their light-emission efficiencies and temperature characteristics. By dynamically changing operational parameters, the system maintains stable color balance despite variations in individual device performance.
Solution Approach 2:
The patent implements color balance adjustment mechanisms that monitor and compensate for variations in light emission from each solid-state light source device. Through feedback control, the system corrects color imbalances caused by different temperature characteristics and emission efficiencies, ensuring stable color reproduction.
3Device complexity
If a single solid-state light source device is used, then the device structure is simplified, but the thermal load concentration makes it difficult to further brighten the projection image
Solution Approach 1:
The patent segments the thermal load by using multiple separate solid-state light source devices instead of one concentrated source. Each device handles a portion of the total light output requirement, distributing the thermal burden and improving overall energy efficiency while maintaining structural simplicity through modular design.
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 configuration allows for a brighter projection image compared to single solid-state light source projectors and stabilizes color balance better than three solid-state light source projectors, with improved light-emission efficiency and temperature characteristics.
Implementation Method 1
a fluorescent layer converting excitation light emitted from the first solid-state light source to light including a first color light component and a second color light component different from the first color light component
Data Source
AI summary
A projector includes: a first solid-state light source device which includes a first solid-state light source emitting excitation light, and a fluorescent layer converting excitation light emitted from the first solid-state light source to light including a first color light component and a second color light component different from the first color light component, and emitting converted light; a second solid-state light source device which includes a second solid-state light source emitting a third color light component different from the first color light component and the second color light component; a light modulation device modulating the first color light component, the second color light component, and the third color light component in accordance with image information; and a projection optical system projecting the modulated light components from the light modulation device as a projection image.