Low-Glare Fluorescent-Powder LED Light Device
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Solution Overview
Problem
Conventional LED light devices suffer from 'face-to-face glare' due to fluorescence interference when high-frequency LEDs illuminate phosphor or fluorescent powder LEDs, leading to reduced signal/noise ratios and potentially misinterpreted images, especially in forensic and biological applications where accurate image representation is crucial.
Innovation Solution
A low-glare fluorescent-powder LED light device design where the high-frequency directional light source is arranged in radial symmetry and the central light beams do not reach the fluorescent-powder LEDs, preventing fluorescence interference and allowing for comparison of images obtained using both types of LEDs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high-frequency LEDs illuminate phosphor or fluorescent powder LEDs, then the light emission intensity is improved, but fluorescence interference occurs leading to reduced signal/noise ratio
Solution Approach 1:
The patent extracts and removes the harmful fluorescent powder from the light-emitting structure. By using LED chips without phosphor or fluorescent powder coatings, the design eliminates the source of fluorescence interference while maintaining light emission intensity through direct LED chip illumination.
Solution Approach 2:
The patent converts the potential harm of fluorescence interference into a benefit by strategically positioning LED chips to illuminate specific areas of interest. The light that would otherwise cause glare is redirected to enhance the detection of fluorescent materials in forensic applications, turning a problematic effect into a useful detection mechanism.
2Ease of manufacture
If conventional LED design with phosphor coating is used, then manufacturing simplicity is improved, but image accuracy is reduced due to face-to-face glare
Solution Approach 1:
The patent segments the lighting function into multiple independent LED chips positioned at different locations and angles. This segmentation allows each chip to serve a specific illumination purpose without causing face-to-face glare, while maintaining manufacturing feasibility through standardized LED chip mounting procedures.
Solution Approach 2:
The patent employs asymmetric positioning of LED chips around the examination area, with chips placed at various angles and distances. This asymmetric arrangement optimizes light distribution to eliminate glare while maintaining manufacturing simplicity through standardized mounting techniques.
3Adaptability or versatility
If multiple light emitting elements are combined, then lighting versatility is improved, but device complexity increases
Solution Approach 1:
The patent makes each LED chip multi-functional by positioning them to simultaneously provide general illumination, targeted area lighting, and glare reduction. This universal approach allows a single LED chip to perform multiple lighting functions, reducing the need for additional specialized components and simplifying the overall device structure.
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 design enhances the credibility of images by reducing fluorescence interference, improving the signal/noise ratio, and enabling accurate comparison of images formed by different light sources, ensuring true and consistent image representation.
Implementation Method 1
a fluorescent powder layer, wherein the substrate chip can emit an exciting light beam with an excitation frequency, while the fluorescent powder layer can absorb part of the exciting light beam to release an excited light beam that has a frequency lower than the excitation frequency of the exciting light beam
Implementation Method 2
Each of the high-frequency LEDs can emit a central light beam to excite a substance containing phosphorescent or fluorescent materials to emit phosphoresce or fluorescence
Data Source
AI summary
A low-glare fluorescent-powder LED light device includes a shell, a multi-frequency directional light source, a high-frequency directional light source, and an electrical control circuit. The shell has a surrounding wall, which defines a front opening and a rear opening and has an inner surface extending along a central axis. The multi-frequency directional light source, including at least one fluorescent-powder LED, is disposed at the inner surface of the shell. The high-frequency directional light source, including a plurality of high-frequency LEDs, is disposed at the inner surface of the shell such that the high-frequency LEDs are arranged in radial symmetry about the central axis. The electrical control circuit can drive the multi-frequency directional light source and/or the high-frequency directional light source. The central light beams emitting from the high-frequency LEDs do not reach the fluorescent-powder LED, so that the fluorescence interference of the fluorescent-powder LED can be avoided.