LED driving circuit and LED straight lamp
A technology of LED driving and driving circuit, applied in the field of LED lighting, can solve the problems of high cost and complex structure, and achieve the effect of reducing manufacturing cost and simplifying the structure of driving circuit
Inactive Publication Date: 2021-06-29
CHENHUI GUANGBAO TECH CO LTD
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- Application Information
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Problems solved by technology
[0005] The invention provides an LED drive circuit and LED straight tube lamp, which solves the problems of complex structure and high cost of the existing TYPE A+B drive circuit
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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0036] It should be noted that when a component is said to be "connected" to another component, it may be directly connected to the other component or intervening components may also exist. When a component is said to be "set on" another component, it may be set directly on the other component or there may be an intervening component at the same time.
[0037] Unless otherwise defined, all technical and scientific terms used herein have the same ...
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The invention discloses an LED driving circuit and an LED straight lamp. The LED driving circuit comprises a first AC input end and a second AC input end which are used for receiving an AC signal input from the outside, a first rectifying circuit and a second rectifying circuit which are used for rectifying the input AC signal to obtain a rectified signal, a third rectifying circuit, a filter circuit and a constant current circuit, wherein the third rectifying circuit is coupled with the first AC input end through a first switching unit and is coupled with the second AC input end through a second switching unit; when the input AC signal is a low-frequency signal, the switching unit is disconnected; when the input AC signal is a high-frequency signal, the switching unit is switched on, and the AC signal is rectified by the third rectifying circuit and then supplies power to an LED; the filter circuit is coupled with the first rectifying circuit and the second rectifying circuit and is used for filtering the rectified signal to obtain a filtered signal; and the constant current circuit is coupled with the filter circuit, receives the filtered signal and supplies power to the LED. According to the invention, the structure of the existing TYPE A + B type driving circuit is simplified, and the cost is reduced.
Description
technical field [0001] The invention relates to the technical field of LED lighting, in particular to an LED driving circuit and an LED straight tube lamp. Background technique [0002] LED lamps have the advantages of energy saving, environmental protection and long life. With the development of LED technology, they are gradually replacing traditional incandescent lamps and fluorescent lamps. Traditional fluorescent lamps generally include electronic ballasts, fluorescent tubes, and lamp carriers. In order to make the tubes energy-saving and environmentally friendly, it is necessary to replace traditional fluorescent tubes with LED tubes. [0003] There are two options for replacing the existing fluorescent lamps: the first one is to directly replace the lamps without modifying the lamps, that is, the fluorescent lamps are directly removed and replaced with LED tubes; the second one is to bypass the electronic ballast by cutting the wires , realize single-ended or double-e...
Claims
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IPC IPC(8): H05B45/30H05B45/37
CPCH05B45/30H05B45/37Y02B20/30
Inventor 周家明蒲纪忠甘彩英赵艺佼
Owner CHENHUI GUANGBAO TECH CO LTD