CN201293229Y - Small power led lighting lamp - Google Patents

Abstract

A low-power LED lighting lamp with simple control circuit structure, low power consumption, high efficiency, low cost and novel structure. Its technical solution is: the housing is composed of LED light-emitting tube board and its control circuit, which is characterized in that the LED light-emitting tube, voltage stabilizing circuit, and current limiting resistor form the housing of the low-power LED lighting lamp. One resistor is connected in series, and then the LED light-emitting tube board is connected in parallel. One end of the interrelated LED light-emitting tube board is connected to the output end of the voltage stabilizing circuit, and the other end is connected to the outside through the casing.

Description

Low power LED lighting

technical field

The utility model relates to a low-power LED illuminating lamp device, in particular to an illuminating lamp composed of low-power LEDs suitable for solar power supply.

Background technique

Currently known low-power LED lighting has three general methods. The first method is that each LED light-emitting tube or several LED light-emitting tubes are driven in series to emit light through a constant current drive circuit, and the entire LED light is powered by a DC power supply. The second method is that each LED light-emitting tube or several light-emitting tubes are connected in series to limit the current through a resistor to emit light. The third method is to connect each LED light-emitting tube connected in parallel together, and then use a constant current source to drive the LED light-emitting tube to emit light.

The problem with the LED lighting lamp of the first approach is that because a large number of driving circuits are required in addition to the LED light-emitting tube, the structure is complex, the volume is huge, and the cost is high. Therefore, the application of LED lighting lamps with this structure is limited. The problem with the LED lighting lamp of the second approach is that the power supply current of the LED light-emitting tube changes due to the instability of the solar power supply voltage, thereby causing the LED lamp to flicker. The disadvantage of the third method is that once a string of LED light-emitting tubes or several strings of LED light-emitting tubes are disconnected, the current of other parallel-connected LED light-emitting tubes will increase, so the life of the LED light-emitting tubes will not be reduced, and it will even burn out. Bad LED light emitting tube.

Contents of the invention

In order to overcome the shortcomings of the existing low-power LED lighting lamps, the utility model provides a low-power LED lighting lamp suitable for unstable DC power supply. The low-power LED lighting lamp is not only simple in structure, but also low in cost,

The technical solution adopted by the utility model to solve the technical problem is: the casing is composed of three kinds of circuit boards. The first kind of circuit board is provided with a voltage stabilizing circuit, the input end of the voltage stabilizing circuit is connected with the power supply end, and the output end of the voltage stabilizing circuit is connected with the LED light-emitting tube. When the solar power supply voltage changes, the voltage stabilizing circuit outputs a constant voltage circuit, which ensures the stability of the power supply current of the LED light-emitting tube. The second type of circuit board is 18 strip-shaped LED light-emitting tube boards, and each strip-shaped LED light-emitting tube board is composed of a resistor connected in series with 4 LED light-emitting tubes. The third type of circuit board is composed of two groups of LED light-emitting tubes connected in parallel, and each group of LED light-emitting tubes is formed by connecting a resistor and four LED light-emitting tubes in series.

The above-mentioned LED light-emitting tube is an in-line LED light-emitting tube or a surface-mounted LED light-emitting tube.

The resistors mentioned above are surface-mounted resistors, which ensure that the current passing through the LED light-emitting tube is in a stable range.

The above-mentioned circuit board is a PCB board, and the solder resist layer is white to ensure the brightness of the LED lamp.

The beneficial effects of the utility model are: while providing constant brightness lighting, the shell of the lighting lamp is only composed of a PCB board, which simplifies the structure of the device, reduces the cost, and at the same time ensures the heat dissipation of the LED light-emitting tube, and the director of the LED The lifetime of the luminous tube.

Compared with the first method, the utility model reduces a large number of drive circuits in the LED lighting lamps in the past, reduces the control circuits of the LED lighting lamps, and reduces the cost.

Compared with the second approach, the utility model ensures the constant brightness of the LED lighting lamp and prolongs the service life of the LED light-emitting tube.

Below in conjunction with accompanying drawing and embodiment the utility model is described further.

Description of drawings

Fig. 1 is a structural representation of the utility model.

Fig. 2 is the electrical schematic diagram of the utility model.

Detailed ways

Embodiment 1: In Fig. 1, a kind of novel LED illuminating lamp, housing comprises 18 bar-shaped LED light-emitting tube boards 2, a garden-shaped LED light-emitting tube board 3 and a garden-shaped voltage stabilizing circuit board 7. It is characterized in that four LED light-emitting tubes 4 and one resistor 6 are connected in series on the bar-shaped LED light-emitting tube plate 2 . The garden-shaped LED luminous tube plate 3 is provided with two strings of LED luminous tubes connected in parallel, and each string of LED luminous tubes is connected in series with 4 LED luminous tubes 8 and 1 resistor 9 . One end of all four LED light-emitting tubes and one resistor string is connected to the output end of the voltage stabilizing circuit 5 , and the other end is connected to the casing 1 to the outside of the casing. See Figure 2.

The LED luminous tube 8 and the LED luminous tube 8 are in-line LED luminous tubes, and the resistor 6 and the resistor 9 are surface mount resistors.

Embodiment 2: In FIG. 1, a new LED lighting lamp, the housing includes 18 strip-shaped LED light-emitting tube plates 2, one circular LED light-emitting tube plate 3, and one circular voltage-stabilizing circuit board 7. It is characterized in that four LED light-emitting tubes 4 and one resistor 6 are connected in series on the bar-shaped LED light-emitting tube plate 2 . The garden-shaped LED luminous tube plate 3 is provided with two strings of LED luminous tubes connected in parallel, and each string of LED luminous tubes is connected in series with 4 LED luminous tubes 8 and 1 resistor 9 . One end of all four LED light-emitting tubes and one resistor string is connected to the output end of the voltage stabilizing circuit 5 , and the other end is connected to the casing 1 to the outside of the casing. See Figure 2.

The LED light-emitting tube 8 and the LED light-emitting tube 8 are surface-mounted LED light-emitting tubes, and the resistors 6 and 9 are surface-mounted resistors.

Claims (2)

1. A low-power LED illuminating lamp with simple control circuit is characterized in that the illuminating lamp comprises: low-power LED light-emitting tubes, voltage stabilizing circuits, current-limiting resistors and circuit boards, and each of these low-power LED light-emitting tubes is 4 and 1 The resistors are connected in series and then connected in parallel. 2. The low-power LED lighting lamp according to claim 1, characterized in that the LED light-emitting tube is an in-line LED light-emitting tube or a surface-mounted LED light-emitting tube.

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