LED white light source based on metal circuit board

Abstract

The present invention relates to a white-light, light source using LED as luminous body. It is characterized by that on a metal circuit board a planar or pit-shaped light-reflecting bowl is made, in the centre of said light-reflecting bowl an indium-gold, gold-tin or similar alloy coating layer is evaporated or coated, then a high-effective blue-light LED bare chip is welded, and the surface of LED chip is covered with epoxy resin or silicon-like transparent resin so as to make two-dimensional blue light be high-effectively and uniformly sent out, the blue light can be passed through a translate film whose interior has doped yellow fluorescent powder or whose surface is coated with yellow fluorescent powder, excited and light-mixed so as to form the invented semiconductor white-light light source.

Description

technical field [0001] The invention relates to a light source using a semiconductor light-emitting diode (LED) as a luminous body, in particular to an LED white light source suitable for general lighting, in particular to an LED white light source based on a metal circuit board, and belongs to the technical field of electric light sources and lighting. Background technique [0002] Since Edison invented the incandescent light bulb, mankind has entered a new era of lighting. The incandescent lamp is the representative of the first generation of electric light source. It emits light by heating the tungsten wire to make it in a hot state, but the luminous efficiency is low and the service life is short. Afterwards, people invented fluorescent lamps, which made the history of electric light sources undergo a new revolution. The significance of this revolution is so great that 70% of the artificial light in the world still comes from fluorescent lamps. However, fluorescent lamp...

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Problems solved by technology

[0005] It can be seen that the structure of the LED white light source packaged in the prior art is complex, the manufacturing process is cumbersome, and many parts are used. The installation of heat sinks, optical lenses, heat sinks and other components and the filling of soft glue still need It is done manually, which makes the production cost too high and the product quality difficult to guarantee

The LED lighting fixtures currently on the market are basically equipped with the above-mentioned LED white light source on the basis of traditional lamps. In the external environment where the LED is located, the internal temperature of the LED will rise, resulting in a decrease in luminous efficiency and even the failure of the entire product. It is difficult to guarantee the expected service life of the LED; on the other hand, because the LED light source is a very strong and dazzling point light source, it must be used for lighting In addition, it is equipped with optical components such as light diffusion sheet or diffuse reflection plate, so that the light becomes a uniform and soft integrated surface light source. This technical problem has not been effectively solved in the prior art.

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