Double-line controlled and driven LED lamp

Abstract

The utility model discloses a double-line controlled and driven LED lamp, comprising a controller, the controller comprises a rectification module, a sampling circuit and a decoding module, positive and negative voltages of a centralized controller are converted into high-voltage direct current to supply power to an LED load, and the positive and negative voltages are converted into low-voltage direct current to supply a working power supply to a control circuit; changes of positive and negative voltages are collected through the sampling circuit, the working state of the LED load is controlled after decoding is conducted through the decoding module, and compared with an existing power line carrier control mode, the system has the advantages of being small in interference, long in transmission distance, simple in circuit structure, low in equipment cost and the like.

Description

Technical Field

[0001] The utility model relates to a lighting fixture, in particular to an LED lighting fixture. Background Art

[0002] In addition to two power lines, current LED lamps also have at least two signal lines in order to achieve dynamic equivalents such as color and brightness changes, and the presentation of text patterns or marquees according to the instructions sent by the centralized controller. This requires at least four wires to be laid between the LED lamps and the centralized controller. These wires are hundreds of meters or even longer, which will undoubtedly increase costs. Although there are relatively mature DC or AC power carrier control methods, these control methods require relatively complex modulation and decoding circuits, and the equipment cost should be relatively expensive. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a dual-wire controlled and driven LED lamp with a simple circuit structure and low price.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A dual-wire controlled and driven LED lamp comprises a controller, wherein the controller comprises a rectifier module, a sampling circuit and a decoding module; the input end of the rectifier module is respectively connected to a positive and negative voltage ±V and a DC ground wire GND, the negative electrode of the output end is a load ground wire GND1, and the positive electrode is divided into two paths, one path is used as a DC power supply positive electrode LED+ and a load ground wire GND1 to provide a working power supply for the load, and the other path is used as a control power supply positive electrode and a load ground wire GND1 to provide a working power supply for the control circuit; one end of the sampling circuit is connected to the positive and negative voltages ±V, and the other end is connected to the sampling input end of the decoding module, and the control signal output end of the decoding module is connected to the control end of the load.

[0006] The rectifier module is a rectifier bridge DB1, the decoding module includes a control chip U2, and the sampling circuit includes a resistor R5; terminal 1 of the control chip U2 is connected to terminal 1 of the rectifier bridge DB1 through a resistor R3, and terminal 2 of the control chip U2 is divided into two paths, one path is connected to the load ground GND1 through a filter circuit, and the other path is connected to the positive and negative voltages ±V through the resistor R5, terminals 3, 4, 5, 6, and 7 are the control signal output terminals, and terminal 8 is connected to the load ground GND1.

[0007] The filter circuit includes a resistor R4, a diode ZD2 and a capacitor C4. The resistor R4, the diode ZD2 and the capacitor C4 are connected in parallel, one end of which is connected to the junction between the resistor R5 and the two ends of the control chip U2, and the other end is connected to the load ground line GND1.

[0008] A polar capacitor C5 is connected between the connection point between the resistor R3 and one end of the rectifier bridge DB1 and the load ground GND1. A diode ZD1 is connected between the connection point between the resistor R3 and one end of the control chip U2 and the load ground GND1.

[0009] The beneficial effects of the utility model are as follows: the LED lamp of the utility model is connected to the centralized controller through two wires, and the positive and negative voltages of the centralized controller are converted into high-voltage direct current to power the LED load. At the same time, the positive and negative voltages are converted into low-voltage direct current to provide working power for the control circuit. The changes in positive and negative voltages are collected by the sampling circuit, and the working state of the LED load is controlled after decoding by the decoding module. Compared with the current power carrier control method, the utility model has the advantages of small interference, long transmission distance, simple circuit structure, and low equipment cost. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0011] Figure 1 It is a circuit principle block diagram of the utility model.

[0012] Figure 2 It is a circuit diagram of a decoding module of the utility model. DETAILED DESCRIPTION

[0013] Reference Figure 1 , Figure 2 A two-wire controlled and driven LED lamp comprises a controller, wherein the controller comprises a rectifier module, a sampling circuit and a decoding module; the input end of the rectifier module is respectively connected to a positive and negative voltage ±V and a DC ground wire GND, the negative end of the output end is a load ground wire GND1, and the positive electrode is divided into two paths, one path is used as a DC power supply positive electrode LED+ and a load ground wire GND1 to provide a working power supply for the load, and the other path is used as a control power supply positive electrode and a load ground wire GND1 to provide a working power supply for a control circuit (including a decoding circuit and other circuits at the subsequent load end); one end of the sampling circuit is connected to the positive and negative voltage ±V, and the other end is connected to the sampling input end of the decoding module, and the control signal output end of the decoding module is connected to the control end of the load.

[0014] The positive and negative voltages ±V are sent by the centralized controller. The power levels in the positive and negative voltages ±V are the same relative to the ground (DC ground GND). For example, if the DC positive voltage is +240V, then the DC negative voltage with the same voltage level relative to the ground is -240V. The positive and negative voltages ±V are continuous, but there is a difference between positive and negative voltages relative to the ground. The changes in positive and negative voltages represent the code 01 in the control signal. After reading and decoding the code, the control instruction can be restored.

[0015] The rectifier module is a rectifier bridge DB1, the decoding module includes a control chip U2, and the sampling circuit includes a resistor R5; terminal 1 of the control chip U2 is connected to terminal 1 of the rectifier bridge DB1 through a resistor R3, and terminal 2 of the control chip U2 is divided into two paths, one path is connected to the load ground GND1 through a filter circuit, and the other path is connected to the positive and negative voltages ±V through the resistor R5, terminals 3, 4, 5, 6, and 7 are the control signal output terminals, and terminal 8 is connected to the load ground GND1.

[0016] The filter circuit includes a resistor R4, a diode ZD2 and a capacitor C4. The resistor R4, the diode ZD2 and the capacitor C4 are connected in parallel, one end of which is connected to the junction between the resistor R5 and the two ends of the control chip U2, and the other end is connected to the load ground line GND1.

[0017] A polar capacitor C5 is connected between the connection point between the resistor R3 and one end of the rectifier bridge DB1 and the load ground GND1. A diode ZD1 is connected between the connection point between the resistor R3 and one end of the control chip U2 and the load ground GND1.

[0018] The beneficial effects of the utility model are as follows: the LED lamp of the utility model is connected to the centralized controller through two wires, and the positive and negative voltages of the centralized controller are converted into high-voltage direct current to power the LED load. At the same time, the positive and negative voltages are converted into low-voltage direct current to provide working power for the control circuit. The changes in positive and negative voltages are collected by the sampling circuit, and the working state of the LED load is controlled after decoding by the decoding module. Compared with the current power carrier control method, the utility model has the advantages of small interference, long transmission distance, simple circuit structure, and low equipment cost.

[0019] The above implementation modes cannot limit the protection scope of the present invention. The equivalent modifications and changes made by those skilled in the art without departing from the overall concept of the present invention are still within the scope of the present invention.

Claims

1. A dual-line controlled and driven LED lamp, comprising a controller, characterized in that The controller includes a rectifier module, a sampling circuit and a decoding module; the input end of the rectifier module is respectively connected to the positive and negative voltages ±V and the DC ground wire GND, the negative electrode of the output end is the load ground wire GND1, and the positive electrode is divided into two paths, one path is used as the DC power supply positive electrode LED+ and the load ground wire GND1 to provide working power for the load, and the other path is used as the control power supply positive electrode and the load ground wire GND1 to provide working power for the control circuit; one end of the sampling circuit is connected to the positive and negative voltages ±V, and the other end is connected to the sampling input end of the decoding module, and the control signal output end of the decoding module is connected to the control end of the load.

2. The dual-line controlled and driven LED lamp according to claim 1, characterized in that The rectifier module is a rectifier bridge DB1, the decoding module includes a control chip U2, and the sampling circuit includes a resistor R5; terminal 1 of the control chip U2 is connected to terminal 1 of the rectifier bridge DB1 through a resistor R3, and terminal 2 of the control chip U2 is divided into two paths, one path is connected to the load ground GND1 through a filter circuit, and the other path is connected to the positive and negative voltages ±V through the resistor R5, terminals 3, 4, 5, 6, and 7 are control signal output terminals, and terminal 8 is connected to the load ground GND1.

3. The dual-line controlled and driven LED lamp according to claim 2, characterized in that The filter circuit includes a resistor R4, a diode ZD2 and a capacitor C4. The resistor R4, the diode ZD2 and the capacitor C4 are connected in parallel, one end of which is connected to the junction between the resistor R5 and the two ends of the control chip U2, and the other end is connected to the load ground line GND1.

4. The dual-wire controlled and driven LED lamp according to claim 3, characterized in that A polar capacitor C5 is connected between a connection point between the resistor R3 and one end of the rectifier bridge DB1 and the load ground line GND1.

5. The dual-wire controlled and driven LED lamp according to claim 3, characterized in that A diode ZD1 is connected between a connection point between the resistor R3 and one end of the control chip U2 and a load ground line GND1 .

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