Color-Changing Evaluation Disc for Dental Curing Light Performance
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Solution Overview
Problem
It is challenging to compare and evaluate the performance characteristics of different dental curing lights, such as the presence of desired wavelengths, footprint size, and light intensity distribution, due to the variability in light sources like QTH bulbs and LEDs, which can only be visually assessed with difficulty.
Innovation Solution
A performance evaluation member, typically a disc made of polymeric materials with a light-sensitive color-changing material, is used to demonstrate and compare the performance characteristics of dental curing lights by changing color in response to specific wavelengths, allowing for the evaluation of desired wavelengths, footprint size, and intensity distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If QTH bulbs are used as light sources, then a broad spectrum of light is generated that can cure a broad range of polymerizable compositions, but substantial waste heat is generated and bulky surrounding structure is required to dissipate the waste heat
Solution Approach 1:
The patent converts the harmful waste heat from QTH bulbs into a beneficial feature by incorporating heat-sensitive color-changing materials that indicate the presence and intensity of curing light through color changes, transforming the waste heat into useful information for evaluating curing light performance
Solution Approach 2:
The patent uses color-changing materials that respond to both light wavelength and temperature to provide visual indicators of curing light characteristics. The color changes enable objective evaluation of spectral composition and intensity without requiring complex measurement equipment
2Weight of stationary object
If LEDs are used as light sources, then the device becomes significantly smaller, requires less power, and emits less heat, but only radiate light at a specific peak wavelength and a narrow range surrounding the peak wavelength
Solution Approach 1:
The patent employs multiple color-changing materials with different spectral sensitivities on a single evaluation disc, allowing visual assessment of LED spectrum coverage. Different regions of the disc respond to different wavelength ranges, enabling evaluation of whether multiple LEDs are needed to achieve broad spectrum coverage
Solution Approach 2:
The evaluation disc is segmented into multiple regions, each containing different color-changing materials sensitive to specific wavelength ranges. This segmentation allows simultaneous evaluation of multiple spectral characteristics using a single compact LED light source
3Adaptability or versatility
If multiple LEDs emitting at different peak wavelengths are used to provide broader spectrum light, then broader spectrum light is achieved, but the device complexity increases
Solution Approach 1:
The patent uses a multi-region color-changing disc where each region indicates the presence and intensity of light at different wavelength ranges. This visual encoding system allows evaluation of multi-LED configurations without requiring complex spectral analysis equipment, simplifying the evaluation process despite device complexity
4Device complexity
If visual assessment by the naked eye is used to evaluate curing lights, then no additional equipment is needed, but it is difficult to compare and evaluate various performance characteristics
Solution Approach 1:
The patent transforms subjective visual assessment into objective measurement by using color-changing materials that provide quantifiable color responses corresponding to specific spectral characteristics. The color intensity and hue directly indicate wavelength presence and light intensity, enabling precise comparison between different curing lights
Solution Approach 2:
The color-changing materials serve as intermediaries between the curing light and the human eye. These materials translate complex spectral information into simple visual signals that can be objectively measured and compared, bridging the gap between raw light output and human perception
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 method enables users to objectively assess and compare dental curing lights, providing clear visual indicators of wavelength presence, intensity, and uniformity, facilitating informed selection among different curing lights.
Implementation Method 1
a light sensitive color-changing material on or within (e.g., impregnated within) the carrier material
Data Source
AI summary
The present invention is directed to methods and related systems for evaluating and demonstrating various performance characteristics of one or more dental curing lights. The method and system employs a performance evaluation member (e.g., in the shape of a disc) comprising a carrier material (e.g., any of various suitable polymeric materials) and a color-changing material on or within (e.g., impregnated within) the body material. A user is able to use the performance evaluation member to demonstrate and evaluate performance characteristics relating to the presence of particularly desired wavelengths within the light emitted by a dental curing light, footprint size and shape of emitted light, uniformity of intensity within the emitted footprint, as well as relative intensities of desired wavelengths provided by two or more dental curing lights.