Projection Lighting With Time-Shared Fluorescence Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing projection devices face challenges in optimizing the performance-price ratio due to the inefficiencies in the illumination system, particularly in the utilization of light energy for outputting primary colors, which affects brightness, color gamut, color saturation, and contrast.
Innovation Solution
A projection illumination apparatus utilizing a first light source assembly, a time-sharing dimming assembly, a light guide assembly, and a fluorescence generation assembly, where the time-sharing dimming assembly splits first primary light into illumination and pump light, and the light guide assembly reflects this light to generate second primary light, enhancing light energy utilization and reducing the need for multiple light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate light sources are used to output red, green, and blue primary colors, then the projection device can achieve complete color coverage, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple light sources into a single blue light source that serves dual purposes: directly providing blue primary light and exciting green fluorescent material to generate green primary light. This merging approach reduces the number of light sources from three separate sources (red, green, blue LEDs or lasers) to just one blue light source, thereby reducing device complexity and cost while maintaining complete color coverage through the blue light source and green fluorescent material combination
Solution Approach 2:
The patent introduces green fluorescent material as an intermediary substance that converts blue light into green light through fluorescence. The blue light source excites the green fluorescent material, which then emits green primary light. This intermediary approach allows a single blue light source to effectively provide both blue and green primary colors, reducing the need for separate green light sources and simplifying the overall device structure
2Adaptability or versatility
If traditional illumination systems are used with separate red, green, and blue light sources, then all primary colors can be output, but the light energy utilization rate is low
Solution Approach 1:
The patent implements continuous useful action by using the blue light source to simultaneously generate blue primary light and excite green fluorescent material for green primary light generation without interruption. The blue light source operates continuously, and the green fluorescent material continuously converts blue light to green light, ensuring that light energy is continuously utilized efficiently to produce both blue and green primary colors, thereby increasing the overall light energy utilization rate
Solution Approach 2:
The patent changes the parameter of light wavelength through fluorescence conversion. The blue light source emits blue light with a specific wavelength, which then excites the green fluorescent material to emit green light with a different wavelength. This parameter change approach allows a single blue light source to effectively provide both blue and green primary colors, improving light energy utilization by converting one wavelength of light into multiple useful wavelengths
3Adaptability or versatility
If three separate light sources are used for red, green, and blue primary colors, then complete color gamut is achieved, but the unit brightness cost increases
Solution Approach 1:
The patent merges the functions of multiple light sources by using a single blue light source to provide both blue primary light and excite green fluorescent material for green primary light generation. This merging reduces the number of light sources from three to one, significantly reducing manufacturing costs while maintaining complete color gamut through the combination of blue light source and green fluorescent material
Solution Approach 2:
The patent uses green fluorescent material as an intermediary that converts blue light into green light, eliminating the need for a separate green light source. This intermediary approach reduces the number of light sources and manufacturing components, thereby reducing unit brightness cost while maintaining complete color gamut through the blue light source and green fluorescent material combination
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 approach increases the light energy utilization rate, reduces unit brightness cost, and improves the performance-price ratio by ensuring brightness, color gamut, and color saturation while minimizing the need for separate red, blue, and green light sources.
Implementation Method 1
the fluorescence generation assembly is configured to output second primary light under excitation of the first primary light
Implementation Method 2
the light guide assembly includes a reflecting element configured to reflect incident first primary light to the fluorescence generation assembly
Data Source
Figure 1~2
Figure 3~5
Figure 6
AI summary
A projection lighting device and a projection apparatus. The projection lighting device comprises a first light source assembly (100), a time-based dimming assembly (110), a light guide assembly (130), and a fluorescence generation assembly (140); the first light source assembly (100) is used for providing first primary color light; the time-based dimming assembly (110) is used for, in a first illumination time period, enabling the first primary color light to be output as an illumination beam, and in a second illumination time period, enabling the first primary color light to be transmitted to the light guide assembly (130); the light guide assembly (130) comprises a reflection element (131) used for reflecting the incident first primary color light to the fluorescence generation assembly (140); the fluorescence generation assembly (140) is used for outputting second primary color light under the excitation of the first primary color light.