LED Oral Cavity Light Source with Chromatic Contrast Filter
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Solution Overview
Problem
Current light sources, such as tungsten and xenon lamps, are inefficient for detecting pathological changes in the oral cavity, as they fail to provide sufficient chromatic difference between normal and abnormal areas, limiting the accuracy of diagnostic imaging, especially in cases like enterovirus infections in children.
Innovation Solution
A light source system utilizing an LED unit with a filter module that generates light within specific CIE chromaticity coordinates (x=0.22±0.05, y=0.18±0.05) to enhance chromatic contrast between normal and pathological areas, combining an illumination module with a CCD unit for improved diagnostic imaging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If regular light sources (tungsten lamp, xenon lamp, halogen lamp) are used for illumination, then the light source can provide sufficient illumination intensity, but the chromatic difference between pathological areas and normal areas is insufficient
Solution Approach 1:
The patent changes the spectral parameters of the light source by using LED with specific dominant wavelengths (480nm±20nm blue light and 630nm±20nm red light) instead of broad-spectrum traditional lamps. This parameter change in light wavelength enables selective absorption by hemoglobin and oxyhemoglobin, creating enhanced chromatic difference between normal and pathological tissues while maintaining sufficient illumination intensity.
Solution Approach 2:
The patent applies different wavelengths of light to different absorption characteristics of biological tissues. By using specific blue and red wavelengths that are selectively absorbed by hemoglobin, the system creates localized chromatic enhancement in vascularized pathological areas, making them appear darker compared to normal areas. This local quality enhancement improves diagnostic precision without compromising overall illumination.
2Measurement precision
If LED light source with specific spectral range is used, then the chromatic difference between normal and abnormal areas is enhanced, but the device complexity increases due to filter module
Solution Approach 1:
The patent segments the illumination function into multiple LED units with different dominant wavelengths (blue 480nm±20nm and red 630nm±20nm). Each LED unit targets specific absorption characteristics of hemoglobin, allowing the system to achieve enhanced chromatic difference through wavelength segmentation rather than using a single complex broadband source with filters, thereby managing device complexity.
Solution Approach 2:
The LED light source performs multiple functions: it provides general illumination, enables chromatic differentiation of pathological areas, and allows for selective wavelength targeting. The same LED units with specific wavelengths serve both as illumination sources and as spectral selectors, eliminating the need for separate filter modules and reducing overall device complexity while maintaining enhanced measurement precision.
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 system significantly enhances the visibility of pathological changes by making abnormal areas appear darker compared to normal areas, thereby improving diagnostic accuracy and operational efficiency for medical personnel.
Implementation Method 1
The filter module is mounted on an optical path of light illuminated by the LED unit to receive the light illuminated by the LED unit, filters a received light to generate light of a required spectral band
Implementation Method 2
The LED unit serves to illuminate. The power is electronically connected to the LED unit to supply power to the LED unit
Implementation Method 3
light-emitting diode (LED) lamps are advantageous in less power consumption, high emitting efficiency
Implementation Method 4
When such light is applied to detect reddish biological tissue, normal areas are brighter while areas having pathological change are darker
Data Source
AI summary
A light source system for detecting oral cavity has an illumination module and a filter module. A spectral range of light is illuminated from the illumination module and filtered through the filter module. When light of such spectral range is irradiated onto a diagnostic area, high chromatic difference and contrast existing between areas with pathological change and normal areas is employed to enhance correctness of diagnoses and operations.