Analysis of the thermal resistance of LED lamps in lighting factories
by：EME LIGHTING
2021-03-22
LEDs are widely used in various fields of society, such as: clothing store LED lights, hotel LED lights, chain store LED lights, office LED lights, etc. No matter which field the LED lamp is used in, the service life is a topic that everyone pays more attention to. The lighting factory here is talking about the LED thermal resistance that affects the service life.
. LED thermal resistance
Thermal resistance usually refers to the resistance of heat flow through an object. It is determined by the nature of material materials. The size of the thermal resistance is proportional to the length of the path through which the heat flow passes, inversely proportional to the cross-sectional area of u200bu200bthe path, and inversely proportional to the thermal conductivity of the material. which is:
Rthu003dL/Sλ
. The meaning of distinguishing the internal thermal resistance of the light source and the external thermal resistance of the light source
For the system, LED thermal resistance includes: internal thermal resistance of the light source and external thermal resistance of the light source as shown in the figure.
The internal thermal resistance of the light source
The internal thermal resistance of the light source is also called package thermal resistance, including:
() The thermal resistance of the LED chip material itself, RL.
() Chip and substrate (heat sink) bonding thermal resistance, RL.
() substrate conduction thermal resistance RL,
() Potting gel thermal resistance, RL.
() Lens thermal resistance, RL.
The external thermal resistance of the light source includes:
() The thermal resistance of the thermal silica gel in the lower layer of the heat sink, RO.
() Thermal resistance of copper clad laminate, RO.
() The thermal resistance of the insulating film between the copper clad laminate and the aluminum substrate, RO.
() Thermal resistance of aluminum substrate, RO.
() The thermally conductive silica gel between the aluminum substrate and the heat sink generates thermal resistance, RO.
（）Thermal resistance of radiator, RO.
In the application, the internal thermal resistance of the light source is the package thermal resistance. It is related to the light attenuation and life span, which are important indicators to measure the quality of the light source. It cannot be changed for the user of the lamp, that is, the system design has nothing to do. The light efficiency of the system is inversely proportional to the thermal resistance of the system. The lower the thermal resistance, the higher the light efficiency.
LED lights for clothing stores LED lights for specialty stores LED lights for chain stores LED lights for flagship stores LED lights for brand stores LED lights for franchise stores LED lights for shopping malls LED lights for supermarkets /zdmcgc.shtml
Lighting Factory
National Advisory Hotline:
Official Website of Lighting Factory:
Production base:
Exhibition hall address:
. LED thermal resistance
Thermal resistance usually refers to the resistance of heat flow through an object. It is determined by the nature of material materials. The size of the thermal resistance is proportional to the length of the path through which the heat flow passes, inversely proportional to the cross-sectional area of u200bu200bthe path, and inversely proportional to the thermal conductivity of the material. which is:
Rthu003dL/Sλ
. The meaning of distinguishing the internal thermal resistance of the light source and the external thermal resistance of the light source
For the system, LED thermal resistance includes: internal thermal resistance of the light source and external thermal resistance of the light source as shown in the figure.
The internal thermal resistance of the light source
The internal thermal resistance of the light source is also called package thermal resistance, including:
() The thermal resistance of the LED chip material itself, RL.
() Chip and substrate (heat sink) bonding thermal resistance, RL.
() substrate conduction thermal resistance RL,
() Potting gel thermal resistance, RL.
() Lens thermal resistance, RL.
The external thermal resistance of the light source includes:
() The thermal resistance of the thermal silica gel in the lower layer of the heat sink, RO.
() Thermal resistance of copper clad laminate, RO.
() The thermal resistance of the insulating film between the copper clad laminate and the aluminum substrate, RO.
() Thermal resistance of aluminum substrate, RO.
() The thermally conductive silica gel between the aluminum substrate and the heat sink generates thermal resistance, RO.
（）Thermal resistance of radiator, RO.
In the application, the internal thermal resistance of the light source is the package thermal resistance. It is related to the light attenuation and life span, which are important indicators to measure the quality of the light source. It cannot be changed for the user of the lamp, that is, the system design has nothing to do. The light efficiency of the system is inversely proportional to the thermal resistance of the system. The lower the thermal resistance, the higher the light efficiency.
LED lights for clothing stores LED lights for specialty stores LED lights for chain stores LED lights for flagship stores LED lights for brand stores LED lights for franchise stores LED lights for shopping malls LED lights for supermarkets /zdmcgc.shtml
Lighting Factory
National Advisory Hotline:
Official Website of Lighting Factory:
Production base:
Exhibition hall address:
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