LED straight pipe lamp

Abstract

An LED straight pipe lamp comprises a lamp pipe, a rectifying circuit, an LED illumination module and a ballast compatible circuit. The lamp pipe is provided with at least two pins and used for receiving an external drive signal. The rectifying circuit is used for rectifying the received external drive signal. The LED illumination module comprises an LED module and is used for emitting light. Theballast compatible circuit is coupled between the pins and the LED illumination module and comprises a detection circuit. The detection circuit is used for detecting whether the external drive signalis a high-frequency or high-voltage signal or not according to the external drive signal. When the external drive signal is the high-frequency or high-voltage signal, the ballast compatible circuit enables the LED module to be turned on.

Description

technical field [0001] The invention relates to the field of lighting appliances, in particular to an LED (light-emitting diode) straight tube lamp and its light source design, electronic components and lamp cap structure. 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 straight tube lamps do not need to be filled with mercury. Therefore, in a variety of lighting systems for home or workplace dominated by lighting options such as traditional fluorescent bulbs and tubes, it is no surprise that LED straight tube lights have gradually become a highly anticipated lighting option. The advantages of LED straight tube lights include increased durability and lifespan as well as lower energy consumption. Therefore, after all factors are considered, LED straight tube lights will be a cost-effective lighting option. [0003] Si...

AI Technical Summary

Problems solved by technology

[0005] Then, when some IS type electronic ballasts are matched, there is a phenomenon that they cannot be started successfully at low voltage (when the grid voltage is lower than 120V).

[0006] However, in addition to electronic ballasts, magnetic ballasts are still used in some areas, and the level and frequency of the driving signal output by magnetic ballasts are different from the driving signals output by electronic ballasts; therefore, the corresponding LED straight tube lamps compatible with electronic ballasts may not be compatible with magnetic ballasts, causing compatibility problems

In addition, the electronic ballast is equivalent to a current source. When it is used as the power supply of the DC-to-DC converter of the LED straight tube lamp, it is easy to cause overcurrent and overvoltage, which will cause damage to the electronic components or the LED straight tube lamp cannot provide stable lighting.

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