LED fluorescent lamp and driving circuit thereof

Abstract

An LED fluorescent lamp includes a lamp tube having at least two pins for receiving an external driving signal; a rectifying circuit for rectifying the received external driving signal to generate a rectified signal; and an LED lighting module comprising an LED module for emitting light. The LED fluorescent lamp emits blinking light to remind the user that LED fluorescent lamp is used in combination with an electronic ballast that does not match the LED fluorescent lamp.

Description

technical field [0001] The invention relates to an LED fluorescent lamp and a driving circuit thereof, belonging to the field of lighting. Background technique [0002] LED lighting technology is rapidly developing to replace traditional incandescent and fluorescent lamps. Compared with fluorescent lamps filled with inert gas and mercury, LED fluorescent lamps do not need to be filled with mercury. Therefore, it is no surprise that LED fluorescent lamps are gradually becoming a highly anticipated lighting option in a variety of lighting systems for home or workplace dominated by lighting options such as traditional fluorescent bulbs and tubes. The advantages of LED fluorescent lamps include increased durability and lifespan as well as lower energy consumption. So, all things considered, LED fluorescent lamps will be the cost-effective lighting option. [0003] Since traditional incandescent and fluorescent lamps have existed for a long time, their connections are matched ...

AI Technical Summary

Problems solved by technology

Therefore, LED fluorescent lamps will affect the resonant design of electronic ballasts, causing compatibility problems

[0005] Then some types of electronic ballasts (such as universal B254PUNV-D) are used in conjunction with LED fluorescent lamps. When they work normally, the electronic ballasts can output high-frequency currents that meet their design requirements; however, when abnormalities occur , the current output by the electronic ballast increases, causing the LED unit (also called LED lamp bead) of the LED fluorescent lamp to burn out the lamp board in the LED fluorescent lamp due to excessive current, (usually burn out the lamp board, (also called the lamp plate fracture))

Because the electronic ballast is designed for constant current output and high output voltage, in extreme cases, an arc will be drawn at the broken LED, resulting in high temperature, causing the LED lamp (glass tube) to burn out, the plastic lampshade to melt and burn, or even start a fire

Images