Preparation method of bent LED lamp filament and bulb provided with same

Abstract

The invention discloses a technological preparation method of a bent LED lamp filament. The preparation method mainly comprises the following steps: etching a circuit on a metal substrate, using a machine to punch or cut a mosquito-repellent incense type vortex shaped structure, carrying out die bond, adhesive deposite and packaging on the lamp filament on the metal substrate, clamping two ends of the lamp filament with a fixture, and uniformly stretching the lamp filament outwards to manufacture the LED lamp filament. Based on the preparation method, the invention further discloses a bulb with the bent LED lamp filament. Compared with the lamp filament made of traditional ceramic, the lamp filament made of the metal or nonmetal substrate is higher in thermal conductivity and power; die bond is carried out on the front side and the reverse side of the metal or nonmetal substrate to enable luminescence of the front side and the reverse side of the LED lamp filament to be more uniform; the vortex shape enables luminescence of the lamp filament to be more three-dimensional and realizes low possibility of breakage of the lamp filament, and the yield of the bent LED lamp filament is higher; and the LED bulb prepared through the preparation technology disclosed by the invention is more uniform in luminescence, higher in wattage and longer in service life.

Description

technical field [0001] The invention relates to a preparation method of a filament and a light bulb, in particular to a preparation method of a curved LED filament and a light bulb with a curved LED filament, belonging to the technical field of LED lighting fixtures. Background technique [0002] With the advantages of uniform light emission, good heat dissipation and energy saving, LED lighting lamps occupy an increasing share in the fields of conventional indoor and outdoor lighting and antique lighting. Since the filaments of current LED lamps are all straight, the wattage is also greatly limited due to the length limitation. From a theoretical point of view, the bulb can be made bigger and the filament can be made very long. , but from a practical point of view, making the bulb bigger and the filament longer, not to mention the cost budget, the manufacturing process is a big limitation. Tungsten wire is the most commonly used raw material for making filaments. Making st...

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Problems solved by technology

Since the filaments of current LED lamps are all straight, the wattage is also greatly limited due to the length limitation. From a theoretical point of view, the bulb can be made bigger and the filament can be made very long. , but from a practical point of view, making the bulb bigger and the filament longer, not to mention the cost budget, the manufacturing process is a big limitation

Tungsten wire is the most commonly used raw material for making filaments. Making straight tungsten wire into a curved shape can greatly increase the length of the filament while the volume of the bulb remains unchanged. However, the filament of the LED lamp --- the LED filament is not made of a single In terms of technology, complex crystal-bonding treatment is required on metal or non-metal substrates, so it is easier to make LED filaments into straight wires, but it is very difficult to make them into curved shapes, especially considering overall production cost

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