LED Lamp Cover Reflector Layout for Heat Dissipation and Glare Control
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Solution Overview
Problem
High-power LED lamps face significant challenges with heat dissipation, leading to reduced lighting efficiency and shortened lifespan due to ineffective management of waste heat.
Innovation Solution
The LED lamp design incorporates a heat sink with fins and a base, a lamp shell with a sleeve and neck, and a power source configuration that includes a heat transferring path from LED chips to the heat sink, along with inner and outer reflecting surfaces to enhance light output and air flow for heat dissipation, utilizing a combination of thermal conduction and convection channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If high-power LED lamps are used to increase lighting efficiency, then energy saving is improved, but heat dissipation becomes problematic leading to reduced lifespan
Solution Approach 1:
The heat dissipation system is segmented into multiple independent channels: a first heat dissipation channel in the lamp shell and a second heat dissipation channel in the heat sink. This segmentation allows heat from different components (power source and LED chips) to be dissipated through separate pathways, improving overall heat management and reliability
Solution Approach 2:
The lamp cover acts as an intermediary element with dual reflecting surfaces. The inner reflecting surface reflects light from inner LED chips, and the outer reflecting surface reflects light from outer LED chips. This intermediary structure optimizes light distribution while the heat dissipation channels serve as intermediaries for thermal management, protecting the LED system from overheating
2Reliability
If heat dissipation structures are added to maintain reliability, then lifespan is improved, but device complexity increases
Solution Approach 1:
The lamp cover is merged with dual reflecting surfaces (inner and outer) that serve both optical functions (light reflection and distribution) and thermal management functions. The heat dissipation channels are integrated into the existing lamp shell and heat sink structures, combining multiple functions into unified components rather than adding separate complex systems
Solution Approach 2:
The heat sink serves multiple functions: it dissipates heat from LED chips through the second heat dissipation channel, supports the optical system, and maintains structural integrity. The lamp shell provides both mechanical protection and houses the first heat dissipation channel. This multi-functionality reduces the need for additional dedicated components, maintaining reliability without proportionally increasing complexity
3Illumination intensity
If lamp cover with reflecting surfaces is used to enhance light output, then illumination intensity is improved, but heat management becomes more difficult
Solution Approach 1:
The lamp cover is divided into distinct functional zones with inner and outer reflecting surfaces positioned at different locations. The inner reflecting surface corresponds to inner LED chips while the outer reflecting surface corresponds to outer LED chips. This segmentation allows optimized light reflection from each LED group while maintaining separate heat dissipation pathways through the dual channels
Solution Approach 2:
The dual reflecting surfaces in the lamp cover act as intermediaries that redirect and distribute light from the LED chips to achieve uniform illumination. Simultaneously, the heat dissipation channels serve as intermediary pathways that transport heat away from the LED components and power source, mediating between the heat-generating components and the external environment
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
This design effectively dissipates heat through thermal conduction and convection, improving the LED lamp's efficiency and lifespan by maintaining optimal operating temperatures and reducing glare while enhancing light concentration and illuminance.
Implementation Method 1
a light emitting surface connected to the heat sink of the passive heat dissipating element... to form a heat transferring path from the LED chips to the passive heat dissipating element
Implementation Method 2
a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips and transferred to the heat sink
Implementation Method 3
the inner reflecting surface is disposed in a position of an inner circle of the array of the LED chips... the inner reflecting surface of the lamp cover is configured to reflect part of light emitted from the innermost of the array of LED chips
Implementation Method 4
the outer reflecting surface is disposed in the outer circle of the array of the LED chips... the outer reflecting surface of the lamp cover is configured to reflect part of light emitted from the outermost of the array of LED chips
Implementation Method 5
a first heat dissipating channel formed in a first chamber of the lamp shell for dissipating heat generated from the power source... a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink for dissipating the heat generated from the LED chips
Data Source
AI summary
An LED lamp includes: a lamp shell; a passive heat dissipating element having a heat sink, wherein the heat sink comprises fins and a base; a power source; a light emitting surface connected to the heat sink of the passive heat dissipating element and comprising LED chips; a first heat dissipating channel formed in a first chamber of the lamp shell; a second heat dissipating channel formed in the heat sink and between the fins and the base of the heat sink; and a lamp cover connected with the heat sink and having a light output surface, an end surface, an inner reflecting surface disposed inside the light output surface of the lamp cover and an outer reflecting surface disposed in the outer circle of the array of the LED chips; wherein a relationship as follows is satisfied between the LED chips and the inner and outer reflecting surface: (A1/N1):(A2/N2)=0.4˜1; where A1 and A2 respectively represent area of the inner and outer reflecting surface; where N1 and N2 respectively represent number of the innermost and outermost of the array of LED chips of the light emitting surface.