High power semiconductor lighting source

Abstract

The invention provides a high-power semiconductor illuminating light source. The high-power semiconductor illuminating light source comprises an LED (light emitting diode) module, a light distributing unit and a heat sink, wherein the LED module can be used for converting electric energy into luminous energy and is arranged between the light distributing unit and the heat sink; the heat sink comprises a substrate and fins; the fins extend outwards from a surface of the substrate to the direction which is far away from the surface of the substrate; the LED module is arranged on the other surface, which is opposite to the surface with the fins, of the substrate; the light distributing unit comprises a packaging shell and filling liquid; the packaging shell is a hollow shell; space formed by the packaging shell and the substrate is filled with the filling liquid; and the LED module is positioned in the space and soaks in the filling liquid. The high-power semiconductor illuminating light source is light in weight and low in cost, and has an excellent illuminating effect and an excellent heat dissipation effect.

Description

technical field [0001] The invention relates to a high-power semiconductor lighting source. Background technique [0002] Due to the advantages of energy saving and environmental protection, semiconductor lighting has been included in my country's strategic emerging industries, and has been widely used in general lighting fields such as indoor lighting, outdoor lighting and landscape lighting. Semiconductor lighting technology is developing rapidly, and the light efficiency of high-end commercial semiconductor lighting sources has reached 150lm / W. However, even for such a high-efficiency semiconductor lighting source, only 30%-60% of the input electric power is converted into light energy, and 70%-40% of the electric energy is still converted into heat. If the heat cannot be dissipated in time, it will lead to an increase in the junction temperature of the LED chip, which in turn will lead to a decrease in its luminous efficiency, a shortened lifespan, and a shift in the lu...

AI Technical Summary

Problems solved by technology

On the one hand, the thermal conductivity of the optical system composed of these materials is poor. As the thickness and volume of the material increase, the hindrance to heat dissipation becomes more obvious, which in turn further increases the burden on the heat sink on the back of the LED light source.

On the other hand, as the thickness of the material of the optical system increases, the absorption of the light emitted by the LED device by the optical system also increases, resulting in a decrease in the utilization rate of light energy.

Moreover, as the thickness and volume of the material of the optical system increase, the thickness and volume of the heat sink on the back of the LED light source must also increase accordingly to achieve good heat dissipation. This design greatly increases the volume and weight of the LED light source , which in turn leads to an increase in the cost of the LED light source and brings a lot of inconvenience to the application

[0007] In summary, there is still a lack of high-power (greater than 10W) ​​semiconductor lighting sources that are light in weight, low in cost, and have excellent lighting effects and heat dissipation effects.

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