Dental Light LED Collimating Lens System Glare Reduction
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Solution Overview
Problem
Current dental lights using incandescent or quartz-halogen bulbs face challenges with lower color rendering index (CRI) and discomfort issues, such as operator eye fatigue and patient shadowing, which are not effectively addressed by LED light sources due to their inherent limitations in light quality and beam pattern design.
Innovation Solution
The development of a dental light system utilizing high-brightness white LED light sources combined with collimating lens systems, including diffusers and apertures, to enhance color uniformity and reduce glare, while also incorporating thermally conductive materials for heat management and dual-mode operation for safe curing of light-curable dental materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If LED light sources are used in dental lights, then power consumption is reduced and life is extended, but color rendering quality deteriorates
Solution Approach 1:
The patent combines multiple LED light sources with different color temperatures (e.g., warm white and cool white LEDs) in a single dental light system. This merging of different LED types allows the system to achieve superior color rendering by combining the spectral characteristics of each LED type, while maintaining the low power consumption and long life benefits of LED technology.
Solution Approach 2:
The patent employs composite optical systems including multiple lens types (collimating lenses, diffusers, beam shaping lenses) arranged in sequence. This composite optical architecture processes the light from LED sources to enhance color rendering and beam quality, resolving the contradiction between LED longevity and color rendering performance.
2Illumination intensity
If conventional light sources are used, then color rendering is good, but radiant heat is high and power consumption is high
Solution Approach 1:
The patent replaces conventional incandescent and halogen light sources with LED light sources that utilize electroluminescence instead of thermal radiation. This fundamental substitution eliminates the direct conversion of electrical energy to heat that characterizes conventional sources, achieving superior color rendering with significantly reduced radiant heat and power consumption.
3Use of energy by stationary object
If LED light sources are used, then power consumption is reduced, but operator discomfort and shadowing increase
Solution Approach 1:
The patent incorporates adjustable beam angle components and movable optical elements that allow dynamic adjustment of the light beam characteristics. This enables the system to adapt the beam pattern to minimize shadowing in different dental procedures while maintaining low power consumption, addressing operator comfort issues without sacrificing energy efficiency.
Solution Approach 2:
The patent divides the light source system into multiple independent LED modules with individual optical control. This segmentation allows different regions of the illumination area to be optimized independently, reducing shadowing effects by positioning light sources at optimal angles while maintaining overall low power consumption.
4Device complexity
If simple optical systems are used, then device complexity is low, but color uniformity is poor
Solution Approach 1:
The patent introduces diffuser elements as intermediary components between the LED light sources and the final beam output. These diffusers act as mediators that scatter and redistribute light, achieving superior color uniformity across the illumination area. The diffusers compensate for the directional nature of LED emission and the spectral characteristics of individual LED chips, delivering uniform color rendering with moderate optical complexity.
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 improves light quality by increasing the color rendering index and reducing operator discomfort, while ensuring effective heat dissipation and safe operation for light-curable materials, thus enhancing the overall performance and usability of dental lights.
Implementation Method 1
The diffuser can be a transparent optical element having a microstructured surface
Implementation Method 2
configured to mix light within the light beam by controlled diffusion
Implementation Method 3
at least one collimating lens system situated to receive the light beam and configured to mix light within the light beam
Implementation Method 4
at least one light emitting diode (LED) light source configured to produce a light beam
Data Source
AI summary
A dental light comprises at least one light emitting diode light source configured to produce a light beam and at least one collimating lens system situated to receive the light beam. The collimating lens system is configured to collect and collimate the light beam. The collimating lens system can additionally modify the beam through controlled diffusion or shape the beam using an aperture.