Light Source Module Spectral Tuning for Sunlight-Like LED Illumination
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Solution Overview
Problem
LED lighting lacks the comfort and color rendering quality of traditional light sources like incandescent and halogen lamps, leading to homogenization issues in the lighting market where either efficiency or cost is prioritized over light quality.
Innovation Solution
A light source module comprising a blue light LED chip, green light fluorescent body, and red light fluorescent body, with specific spectral characteristics and phosphor ratios to achieve a color temperature between 4800 K and 6800 K, and color rendering indices greater than 85, 50, and 95, respectively, mimicking daylight and tungsten halogen lamp light quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple separate light sources are used to illuminate different layers of a retinal model, then the illumination coverage and functional capability are improved, but the device complexity and alignment difficulty increase
Solution Approach 1:
The single light source is segmented into multiple independent light emitting regions (first, second, third light emitting regions) that can be selectively activated. Each region corresponds to different illumination requirements for various retinal layers, allowing the system to function as multiple light sources while maintaining a unified physical structure, thus reducing alignment complexity while preserving illumination coverage.
Solution Approach 2:
A single light source structure is designed to perform multiple illumination functions simultaneously. The light source can illuminate different retinal layers (photoreceptor layer, ganglion cell layer, etc.) through different light emitting regions, making one component serve the role of multiple specialized light sources, thereby reducing overall device complexity while maintaining versatility.
2Manufacturing precision
If multiple separate light sources are used to provide different illumination functions, then the illumination precision and functional specialization are improved, but the alignment accuracy and manufacturing difficulty increase
Solution Approach 1:
Multiple light emitting regions are integrated into a single light source component rather than using separate light sources. This merging approach maintains the precision benefits of multiple specialized illumination zones while eliminating the need for complex alignment procedures between separate components, significantly easing manufacturing and assembly processes.
Solution Approach 2:
The light emitting regions are pre-positioned and pre-aligned within the single light source structure during manufacturing. This preliminary action ensures that when the light source is installed in the ophthalmic device, the illumination precision is already optimized for different retinal layers, eliminating the need for complex post-installation alignment procedures.
3Adaptability or versatility
If the light source structure is made complex to accommodate multiple illumination functions, then the functional capability is improved, but the ease of operation and maintenance are worsened
Solution Approach 1:
A single light source structure is designed to perform multiple illumination functions for different retinal layers through its multiple light emitting regions. This universal design allows one component to replace multiple specialized components, simplifying the overall system operation and maintenance while maintaining full functional capability for comprehensive retinal imaging.
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
The solution provides a high comfort, high preference, and high color gamut index light source with a spectral distribution similar to sunlight, addressing the limitations of current LED lighting in terms of color rendering and luminescent material influence.
Implementation Method 1
The light source module comprises a first light source and a second light source, wherein the first light source comprises a first light emitting diode, and the second light source comprises a second light emitting diode
Data Source
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AI summary
A light source module, and an illumination device including the light source module are provided. By adjusting peak wavelengths, peak intensities and color coordinates of blue light, red light and green light in the illumination light emitted by the light source module to preset ranges, the illumination light emitted by the light source module has a specific spectral distribution. In another embodiment, a specific light color is achieved by a specific phosphor ratio. Not only the color theory is considered for the evaluation of the lighting effect, but also the influence of the spectrum on the actual lighting effect is considered. At the same time, the influence of the luminescent material on the spectrum is considered. Thus a light source having a high comfort, a high preference, a high color rendering index, and a high color gamut index is obtained, and the light source has a similar effect to the sunlight.