LED light-emitting lamp filament and LED bulb adopting same

Abstract

The invention discloses an LED light-emitting lamp filament and an LED bulb adopting the same. The LED light-emitting lamp filament comprises a strip-shaped substrate and multiple LED chips arranged on the strip-shaped substrate. The two ends of the strip-shaped substrate are each provided with a metal strip-shaped electrode. The multiple LED chips are connected in series to form an LED light source. Multiple electronic devices having one of the conductive function, the current-limiting function and the protection function are arranged at the position, close to one of the ends, on the strip-shaped substrate or the position, close to each of the ends, on the strip-shaped substrate. The metal strip-shaped electrodes, the electronic devices and the LED light source are connected through a wire. The periphery of the strip-shaped substrate, the periphery of the LED light source, the periphery of each electronic device and the periphery of the connection position between the strip-shaped substrate and each metal strip-shaped electrode are coated with fluorescent rubber. The LED light-emitting lamp filament and the LED bulb adopting the same have the beneficial effects that according to different properties of the electronic devices, the connection wire of the LED light source and the metal strip-shaped electrodes can be prevented from rupture; or a current of the LED light-emitting lamp filament can be prevented from overcurrent; or the LED light-emitting lamp filament can be free from influence of overvoltage and overcurrent; or when the LED light-emitting lamp filament is overheated, the heat emitting phenomenon is reduced.

Description

technical field [0001] The invention relates to an LED filament lamp, in particular to an LED luminous filament and an LED bulb lamp using the LED luminous filament. Background technique [0002] LED filament lamps are becoming more and more popular, especially in Europe and America. Compared with traditional incandescent lamps, the difference between LED filament lamps is mainly reflected in the structure of the light-emitting filament and the driving power supply. To replace the tungsten filament of an incandescent lamp with an LED filament, it is generally necessary to increase the driving power for the LED filament to work, while the incandescent lamp does not need a driving power supply. , directly use the mains power supply to light up. [0003] Existing LED filaments include a strip substrate and a plurality of LED chips bonded or welded on the strip substrate. Metal strip electrodes are arranged at both ends of the strip substrate. , alloy wire, etc.) or the printe...

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Problems solved by technology

[0004] The above-mentioned LED filament lamps have the following problems: 1) Since the strip substrate and all LED chips in the LED filament used are covered and protected by fluorescent glue, and the two metal strip electrodes are exposed at both ends, however, because the fluorescent glue is relatively fragile , so the LED filament is taken and used on the metal strip electrode, so the metal strip electrode is easily affected by external forces, especially in the assembly process of the LED filament lamp, it is necessary to perform spot welding at the metal strip electrode, spot welding The process will produce mechanical and thermal shocks, which will easily lead to the breakage of the connecting wires between the metal strip electrode and the LED chip, and eventually lead to the failure of the LED filament; 3) When there are multiple LED filaments used, the multiple LED filaments are usually connected in series, parallel or series-parallel. When one or more When one LED filament is broken, the other LED filaments will have too much current, which will cause heat and shorten the life of the LED filament or even burn it out.

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