Rotating Fluorescent Exciter for Adjustable LED Color Temperature
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Solution Overview
Problem
Lighting devices using LEDs face reduced lifespan and illuminance due to heat retention, and existing solutions do not effectively address the need for adjustable color temperature and quality in lighting applications.
Innovation Solution
A lighting device design incorporating a light emitting device with an optical exciter that includes yellow, green, and red fluorescent materials, where the optical exciter moves over the light emitting device, allowing for variation in color temperature through different configurations of fluorescent materials and their ratios on rotating plates or layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the optical exciter is fixed over the light emitting device, then the structure is simple, but the color temperature cannot be adjusted
Solution Approach 1:
The optical exciter is made movable relative to the light emitting device through rotation, allowing dynamic adjustment of color temperature. The exciter can rotate to different positions to select different fluorescent materials, transforming a static structure into a dynamic one that adapts to different lighting requirements.
Solution Approach 2:
The optical exciter is divided into multiple segments or zones, each containing different fluorescent materials (yellow, green, red). By rotating the exciter to bring different segments into position over the light emitting device, different color temperatures are achieved, effectively segmenting the color temperature control function.
2Reliability
If heat is not readily radiated, then the LED life span and illuminance are reduced, but adding heat radiation structures increases device complexity
Solution Approach 1:
The optical exciter serves multiple functions: it converts light to different color temperatures and simultaneously acts as a heat radiation structure. By making the exciter rotatable and positioning it to receive heat from the LED, it performs both optical and thermal management functions, reducing the need for separate heat dissipation components.
Solution Approach 2:
The heat radiation function is merged with the optical excitation function. The optical exciter is positioned and configured to receive heat from the light emitting device while performing its primary function of converting light to different color temperatures, combining two functions into a single component.
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 enables the emission of light with varying color temperatures, improving the quality and longevity of LED lighting by effectively managing heat through enhanced heat radiation and adjustable optical properties.
Implementation Method 1
an optical exciter which is disposed over the light emitting device and emits light excited by the light emitted from the light emitting device
Data Source
AI summary
A lighting device may be provided that includes: a light emitting device; and an optical exciter which is disposed over the light emitting device and emits light excited by the light emitted from the light emitting device, wherein the optical exciter includes at least one of a yellow fluorescent material, a green fluorescent material and a red fluorescent material, wherein the optical exciter moves over the light emitting device, and wherein a color temperature of the light emitted from the optical exciter varies according to the movement of the optical exciter.