Flexible LED lamp filament and LED lamp

Abstract

The invention provides a flexible LED lamp filament and an LED lamp and belongs to the field of LED lamp filaments. The flexible LED lamp filament comprises a flexible base plate, a plurality of LED chips, an insulating layer, fluorescent glue and a circuit layer. The flexible base plate comprises a luminous part and a radiating part. The distance between every two adjacent LED chips in the multiple LED chips is reduced gradually in the direction from the center of the luminous part to the two ends of the luminous part, and thus heat in the middle of the luminous part during usage of the flexible LED lamp filament is reduced. In addition, the heat of the luminous part of the flexible LED lamp filament can be further emitted through the radiating part of the flexible base plate, then the radiating ability and effective load ability of the flexible LED lamp filament are improved, and the effects of energy conservation and environment protection are achieved.

Description

technical field [0001] The invention relates to the field of LED filaments, in particular to a flexible LED filament and an LED lamp. Background technique [0002] A light-emitting diode (Lighting Emitting Diode, referred to as LED) filament is a plurality of LED chips fixed in series on a glass substrate, and then molded and packaged to complete. LED filament lamps can be used to produce LED bulb lamps that are similar in shape to incandescent lamps, that is, LED filament lamps. LED filament lamps can achieve 360-degree full-circle lighting. LED filament lamp has a shape and light distribution curve similar to incandescent lamps, and is the most ideal light source to replace incandescent lamps in the true sense. [0003] Due to the poor heat dissipation capability of the LED filament in the existing LED lamp, the wattage of the LED lamp is very small. No matter how small the wattage of the LED light is, the heat that cannot be dissipated will accumulate on the LED filamen...

AI Technical Summary

Problems solved by technology

[0003] Due to the poor heat dissipation ability of the LED filament in the existing LED lamp, the wattage of the LED lamp is very small

No matter how small the wattage of the LED light is, the heat that cannot be dissipated will accumulate on the LED filament for a long time, which will cause the colloid on the LED chip to expand, stretch the welding gold wire of the LED chip, and cause the gold wire to break, and the LED chip to break. The electricity is not bright, which causes the problem of LED lights dead

[0004] Moreover, the existing LED filaments are provided with LED chips at equal intervals on the substrate. Since the heat emitted by each LED chip is constant, the heat between each LED chip is superimposed, and the thermal field distribution of the LED filament is in the middle. The height gradually decreases to both ends, that is, the heat distribution is very uneven, and it is basically concentrated in the middle of the substrate

The high heat in the middle of the substrate during use may easily cause the LED chip in the middle to have a large degree of light attenuation, or even fail, and the colloid in the middle to turn yellow. In addition, the higher the temperature, the greater the internal stress, which will lead to high temperature. The metal wire is easy to break, etc.

Similarly, the thermal field distribution of the entire substrate is uneven, which will lead to different attenuation degrees of LED chips in different positions, and different aging degrees of colloids in different positions, resulting in color drift, inconsistent brightness, color, etc. of the product, and even lead to poor electrical properties of the product. and failure

Images