LED lamp circuit regardless of single-ended or double-ended power supply

Abstract

The utility model relates to the technical field of LED fluorescent lamps, and in particular to an LED lamp tube circuit that does not distinguish between single-end and double-end power supply, which includes a rectifier, a constant current drive circuit and an LED light bar, the rectifier has four input terminals connected to lamp pins, the output end of the rectifier is connected to the input end of the constant current drive circuit, the output end of the constant current drive circuit is electrically connected to the access end of the LED light bar, the rectifier includes a first rectifier bridge stack Z1 and a second rectifier bridge stack Z2, the positive and negative electrodes of the input end of the constant current drive circuit are respectively connected between the diode 1 D1 and the diode 2 D2 of the first rectifier bridge stack Z1 and between the diode 3 D3 and the diode 4 D4 through wires, and the diode 5 D5 and the diode 6 D6 of the first rectifier bridge stack Z2, and the diode 7 D7 and the diode 8 D8 are respectively connected with wires connected to the positive and negative electrodes of the input end of the constant current drive circuit. The two rectifier bridge stacks of the utility model rectifier use half of the diodes in each of them to form a new bridge stack to work, thereby realizing an LED lamp tube circuit that does not distinguish between single-end or double-end power supply.

Description

Technical Field

[0001] The utility model relates to the technical field of LED fluorescent lamps, in particular to an LED lamp tube circuit which is not divided into single-end and double-end power supply. Background Art

[0002] Conventional tubular LED lamps on the market have built-in rectifiers, such as Figure 1 As shown, the AC voltage (220V) is connected to the lamp pins at the left and right ends of the lamp tube through the neutral wire and the live wire to complete the power supply. Figure 2 (a) and Figure 2 As shown in (b), the AC voltage (220V) is connected to the two lamp pins at one end of the lamp tube through the neutral wire and the live wire to power the lamp tube. When installed on site, there are single-end power supply bases and double-end power supply bases. When repairing or replacing, the lamp tube with the corresponding power supply method must be used, which is very complicated and troublesome. In the existing LED fluorescent lamp driving voltage rectification circuit, any two of the four input terminals can be connected to the power supply, but in actual installation and use, the setting of the lamp pin is only suitable for a single end to be connected to the neutral wire and the live wire at the same time, or one end of the double end is connected to the neutral wire and the other end is connected to the live wire. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art and provide an LED lamp circuit that is not divided into single-ended and double-ended power supply.

[0004] The utility model solves the technical problem by adopting the following technical solution: an LED lamp tube circuit that is not divided into single-end and double-end power supply, including a rectifier, a constant current drive circuit and an LED light bar, wherein the rectifier has four input terminals connected to the lamp pins, the output end of the rectifier is connected to the input end of the constant current drive circuit, the output end of the constant current drive circuit is electrically connected to the access end of the LED light bar, the rectifier includes a first rectifier bridge stack Z1 and a second rectifier bridge stack Z2, the first rectifier bridge stack Z1 includes a diode 1 D1, a diode 2 D2, a diode 3 D3 and a diode Four D4, the positive electrode of the constant current drive circuit input end is connected between the diode one D1 and the diode two D2 through a wire, the negative electrode of the constant current drive circuit input end is connected between the diode three D3 and the diode four D4 through a wire, the first rectifier bridge stack Z2 includes a diode five D5, a diode six D6, a diode seven D7 and a diode eight D8, a wire connected to the positive electrode of the constant current drive circuit input end is connected between the diode five D5 and the diode six D6, and a wire connected to the negative electrode of the constant current drive circuit input end is connected between the diode seven D7 and the diode eight D8.

[0005] Furthermore, the four input terminals are respectively input terminal one L1, input terminal two N1, input terminal three L2 and input terminal four N2, wherein input terminal one L1 and input terminal two N1 are located on the same side, and input terminal three L2 and input terminal four N2 are located on the same side.

[0006] Furthermore, the input terminal 1 L1 is connected between diode 1 D1 and diode 3 D3, the input terminal 2 N2 is connected between diode 2 D2 and diode 4 D4, the input terminal 3 L2 is connected between diode 5 D5 and diode 7 D7, and the input terminal 2 N2 is connected between diode 6 D6 and diode 8 D8.

[0007] Furthermore, when the input terminal 1 L1 is the live wire and the input terminal 2 N1 is the neutral wire, the first rectifier bridge stack Z1 works to output a DC voltage, or when the input terminal 3 L2 is the live wire and the input terminal 2 N2 is the neutral wire, the second rectifier bridge stack Z2 works to output a DC voltage.

[0008] Furthermore, the input terminal one L1 and the input terminal two N1 are connected to form a live line, the input terminal three L2 and the input terminal three N2 are connected to form a neutral line, and the diode three D3 and the diode D4 of the first rectifier bridge stack Z1 and the diode five D5 and the diode six D6 of the second rectifier bridge stack Z2 work to output a DC voltage.

[0009] The beneficial effect of the utility model is that the first rectifier bridge stack Z1 and the second rectifier bridge stack Z2 of the rectifier of the utility model are combined into a bridge stack circuit to power the constant current drive circuit, and half of the diodes in the two rectifier bridge stacks are used to combine into a new bridge stack to work, thereby realizing an LED lamp tube circuit without distinguishing between single-ended or double-ended power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0011] Figure 1 It is a structural schematic diagram of a double-end powered LED lamp circuit in the prior art.

[0012] Figure 2 It is a structural schematic diagram of a single-ended power supply LED lamp circuit in the prior art.

[0013] Figure 3 It is a principle diagram of the utility model.

[0014] Figure 4 It is a specific principle diagram of the utility model. DETAILED DESCRIPTION

[0015] The present invention is now further described in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0016] like Figure 3 As shown, an LED lamp tube circuit with no distinction between single-ended and double-ended power supply includes a rectifier, a constant current drive circuit and an LED light strip, the output end of the rectifier is connected to the input end of the constant current drive circuit, the output end of the constant current drive circuit is electrically connected to the access end of the LED light strip, the rectifier has four input terminals, the four input terminals are respectively connected to the lamp pins, the four input terminals are input terminal one L1, input terminal two N1, input terminal three L2 and input terminal four N2, wherein input terminal one L1 and input terminal two N1 are located on the same side, and input terminal three L2 and input terminal four N2 are located on the same side.

[0017] like Figure 4 As shown, the rectifier includes a first rectifier bridge stack Z1 and a second rectifier bridge stack Z2. The first rectifier bridge stack Z1 includes a diode D1, a diode D2, a diode D3 and a diode D4. The positive electrode of the constant current drive circuit input end is connected between the diode D1 and the diode D2 through a wire, and the negative electrode of the constant current drive circuit input end is connected between the diode D3 and the diode D4 through a wire. The first rectifier bridge stack Z2 includes a diode D5, a diode D6, a diode D7 and a diode D8. A wire connected to the positive electrode of the constant current drive circuit input end is connected between the diode D5 and the diode D6, and a wire connected to the negative electrode of the constant current drive circuit input end is connected between the diode D7 and the diode D8. Input terminal one L1 is connected between diode one D1 and diode three D3, input terminal two N2 is connected between diode two D2 and diode four D4, input terminal three L2 is connected between diode five D5 and diode seven D7, and input terminal two N2 is connected between diode six D6 and diode eight D8.

[0018] When single-ended power supply is used: when input terminal 1 L1 is the live wire and input terminal 2 N1 is the neutral wire, the two input terminals are connected to 220V AC, and the first rectifier bridge stack Z1 works to output DC voltage, or when input terminal 3 L2 is the live wire and input terminal 2 N2 is the neutral wire, the second rectifier bridge stack Z2 works to output DC voltage (220V), supplying power to the constant current drive power supply to light up the LED light strip.

[0019] When the power is supplied by two terminals: input terminal 1 L1 and input terminal 2 N1 are connected to form the live wire, input terminal 3 L2 and input terminal 3 N2 are connected to form the neutral wire, and 220V AC is connected. The diode 3 D3 and diode D4 of the first rectifier bridge stack Z1 and the diode 5 D5 and diode 6 D6 of the second rectifier bridge stack Z2 work to output DC voltage (220V), supply power to the constant current drive power supply, and light up the LED light strip. Of course, the input terminal 1 L1 and input terminal 2 N1 can also be connected to form the neutral wire, and the input terminal 3 L2 and input terminal 3 N2 can be connected to form the live wire.

[0020] The above-mentioned implementation mode is only for illustrating the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it. It cannot be used to limit the protection scope of the utility model. All equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. An LED lamp circuit for both single-end and double-end power supply, comprising a rectifier, a constant current drive circuit and an LED light bar, wherein the rectifier has four input terminals connected to the lamp pins, the output end of the rectifier is connected to the input end of the constant current drive circuit, and the output end of the constant current drive circuit is electrically connected to the access end of the LED light bar, characterized in that: The rectifier includes a first rectifier bridge stack Z1 and a second rectifier bridge stack Z2, the first rectifier bridge stack Z1 includes a diode D1, a diode D2, a diode D3 and a diode D4, the positive electrode of the constant current drive circuit input end is connected between the diode D1 and the diode D2 through a wire, the negative electrode of the constant current drive circuit input end is connected between the diode D3 and the diode D4 through a wire, the first rectifier bridge stack Z2 includes a diode D5, a diode D6, a diode D7 and a diode D8, a wire connected to the positive electrode of the constant current drive circuit input end is connected between the diode D5 and the diode D6, and a wire connected to the negative electrode of the constant current drive circuit input end is connected between the diode D7 and the diode D8; The four input terminals are input terminal one L1, input terminal two N1, input terminal three L2 and input terminal four N2, wherein input terminal one L1 and input terminal two N1 are located on the same side, and input terminal three L2 and input terminal four N2 are located on the same side; When the input terminal 1 L1 is the live wire and the input terminal 2 N1 is the neutral wire, the first rectifier bridge stack Z1 works to output a DC voltage, or when the input terminal 3 L2 is the live wire and the input terminal 2 N2 is the neutral wire, the second rectifier bridge stack Z2 works to output a DC voltage.

2. The LED lamp circuit according to claim 1, wherein: The input terminal 1 L1 is connected between diode 1 D1 and diode 3 D3, the input terminal 2 N2 is connected between diode 2 D2 and diode 4 D4, the input terminal 3 L2 is connected between diode 5 D5 and diode 7 D7, and the input terminal 2 N2 is connected between diode 6 D6 and diode 8 D8.

3. The LED lamp circuit according to claim 1, wherein: The input terminal 1 L1 and the input terminal 2 N1 are connected to form a live line, the input terminal 3 L2 and the input terminal 3 N2 are connected to form a neutral line, and the diode 3 D3 and the diode D4 of the first rectifier bridge stack Z1 and the diode 5 D5 and the diode 6 D6 of the second rectifier bridge stack Z2 work to output a DC voltage.

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