LED Lighting Device Thermal Conduction Element Heat Dissipation
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Solution Overview
Problem
Conventional lighting devices, particularly recessed 'can' fixtures, face inefficiencies with incandescent and fluorescent lights, including high energy consumption, short lifetimes, and poor color rendering index, while solid-state light emitters like LEDs struggle with high temperature degradation and require multiple units to match incandescent light output, leading to glare and installation challenges.
Innovation Solution
A lighting device featuring a thermal conduction element with solid-state light emitters, a reflective element, and optional luminescent materials, designed for efficient heat dissipation, reduced glare, and improved color rendering, which can be aesthetically integrated into ceilings or other surfaces, using a toroidal thermal conduction element with fins for enhanced heat transfer and a shield to obscure the LEDs from view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If incandescent light bulbs are used, then long lifetime and high color rendering index are achieved, but energy consumption is very high
Solution Approach 1:
The patent transitions from incandescent to fluorescent to solid-state LED lighting, fundamentally changing the operating parameters and mechanism of light generation. LEDs convert electrical energy directly to light through electroluminescence, achieving significantly higher energy efficiency while maintaining long lifetime and improved color rendering capabilities through phosphor conversion layers.
2Use of energy by moving object
If fluorescent light bulbs are used, then energy efficiency is improved, but color rendering index and lifetime are reduced
Solution Approach 1:
The patent employs composite material structures in LED design, combining semiconductor materials with phosphor conversion layers. This composite approach enables LEDs to achieve both the energy efficiency of fluorescent lights and the long lifetime of solid-state devices, while also improving color rendering through the phosphor's spectral conversion properties.
3Use of energy by moving object
If multiple solid state light emitters are used to match incandescent light output, then energy efficiency is improved, but glare and device complexity increase
Solution Approach 1:
The patent integrates multiple LED chips and phosphor layers into a unified solid-state lighting device. By combining these components into a single integrated structure, the system achieves high energy efficiency while reducing the effective number of discrete units and simplifying installation, thereby reducing glare through unified light emission rather than multiple separate sources.
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 provides a long-lasting, energy-efficient, and aesthetically pleasing lighting solution with improved color rendering and reduced fire hazard, capable of being easily installed in difficult-to-reach areas, while effectively managing heat to prolong LED lifespan.
Implementation Method 1
heat conducting element having a first side and a second side, the solid state light emitters and the reflective element being mounted on the first side of the heat conducting element
Implementation Method 2
at least one reflective element mounted on the first side of the heat conducting element
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
First, second and third lighting devices each comprise a thermal conduction element, solid state light emitters and a reflective element. In the second device, the conduction element defines an opening; and the emitters and reflective element are mounted on a first side of the conduction element. In the third device, the conduction element defines an opening; a first portion of a first side of the conduction element is in contact with a contact region of a construction surface; and the emitters and reflective element are mounted on the first side. A fourth device comprises a conduction element and emitters; a first portion of a first side of the conduction element is in contact with a contact region of a construction surface; the emitters are mounted on a second portion of the first side of the conduction element; and a second side of the conduction element is exposed to ambient air.