LED circuit compatible with high and low voltage output emergency driving

Abstract

The LED circuit comprises a power supply drive, an emergency drive and a light source module, the light source module comprises m LED light sources connected in series, the LED + end of the power supply drive is connected with the positive electrode end of the light source module, the LED-end of the power supply drive is connected with the negative electrode end of the light source module, and the LED-end of the power supply drive is connected with the positive electrode end of the light source module. The EM + end of the emergency driver is connected with the positive electrode end of the light source module, and the EM-end of the emergency driver is connected with the negative electrode end of the nth LED light source of the light source module. Under the power-on condition, the power source drive supplies power to the light source module, low-voltage output isolation drive or high-voltage output non-isolation drive can be achieved, under the power-off condition, the emergency drive supplies power to the n LED light sources in the light source module, and the sum of rated voltages of the n LED light sources is smaller than or equal to the rated maximum output voltage of the emergency drive. Therefore, compatibility of low-voltage output isolation emergency driving is realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of LED circuits, and particularly relates to an LED circuit compatible with high and low voltage output emergency drives. Background Technique

[0002] With the development of the lighting industry of lamps, the extended function modules in lamps have become more and more diverse along with the development of lamps, such as the emergency function. With the increase in the functions of lamps, the cost of lamps is also getting higher and higher, and some even need to customize emergency drives for this kind of emergency lamps.

[0003] However, the original wiring method can no longer meet the requirements of the emergency function, and the output voltage of some isolated emergency drives with low voltage output is only dozens of volts, but the series-parallel voltage of the lamp beads in the original light source module is more than two hundred volts, which leads to the problem that the isolated emergency drive with low voltage output cannot be used.

[0004] Therefore, there is an urgent need for an LED circuit compatible with high and low voltage output emergency drives. Content of the Utility Model

[0005] The purpose of the utility model is to provide an LED circuit compatible with high and low voltage output emergency drives to solve the problems raised in the above background technique. An LED circuit compatible with high and low voltage output emergency drives provided by the utility model has the characteristics of being able to meet the normal lighting of the non-isolated LED drive with high voltage output and being able to be compatible with the isolated emergency drive with low voltage output at the same time.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An LED circuit compatible with high and low voltage output emergency drives includes a power supply drive, an emergency drive, and a light source module. Among them, the light source module includes m series-connected LED light sources. The LED+ terminal of the power supply drive is connected to the positive extreme of the light source module, the LED- terminal of the power supply drive is connected to the negative extreme of the light source module, the EM+ terminal of the emergency drive is connected to the positive extreme of the light source module, and the EM- terminal of the emergency drive is connected to the negative extreme of the nth LED light source of the light source module.

[0007] To realize the connection of the power supply drive and the emergency drive to the mains, further, the N terminals of both the power supply drive and the emergency drive are connected to the neutral line, the L1 terminal of the emergency drive is connected to the live line, a switch SW is connected to the L1 terminal of the emergency drive, and the L terminal of the power supply drive is connected to the L2 terminal of the emergency drive.

[0008] Further, both n and m are positive integers, and m≥n, and the sum of the rated voltages of the n LED light sources is less than or equal to the rated maximum output voltage of the emergency drive.

[0009] In order to avoid the situation that the light source module emits a faint light when the control switch is disconnected during the high-voltage test of the light source module or when the control switch is connected to the neutral wire, further, a resistor is connected in parallel to the LED light source.

[0010] Further, the LED light source includes a plurality of LED lamp beads connected in series, parallel, or in series-parallel.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] 1. When the present utility model is powered on, the power supply driver supplies power to the light source module, and can output isolated drive at low voltage or non-isolated drive at high voltage. When powered off, the emergency driver supplies power to n LED light sources in the light source module, and the sum of the rated voltages of the n LED light sources is less than or equal to the rated maximum output voltage of the emergency driver, thereby realizing the compatibility with the low-voltage output isolated emergency drive;

[0013] 2. A resistor is connected in parallel to the LED light source of the present utility model, which avoids the situation that the light source module emits a faint light when the control switch is disconnected during the high-voltage test of the light source module or when the control switch is connected to the neutral wire;

[0014] 3. The series-parallel relationship of the LED lamp beads in the LED light source of the present utility model does not affect the compatibility of the emergency drive. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the circuit diagram of the present utility model;

[0016] Figure 2 is the circuit diagram of Embodiment 2 of the present utility model;

[0017] In the figure: 1. Power supply driver; 2. Emergency driver; 3. Light source module. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] Embodiment 1

[0020] Please refer to Figure 1, the present utility model provides the following technical solutions: An LED circuit compatible with high and low voltage output emergency driving, including a power supply driver 1, an emergency driver 2, and a light source module 3. Among them, the light source module 3 includes m series-connected LED light sources. The LED+ terminal of the power supply driver 1 is connected to the positive extreme of the light source module 3, and the LED- terminal of the power supply driver 1 is connected to the negative extreme of the light source module 3. The EM+ terminal of the emergency driver 2 is connected to the positive extreme of the light source module 3, and the EM- terminal of the emergency driver 2 is connected to the negative extreme of the nth LED light source of the light source module 3. Both n and m are positive integers, and m≥n. The sum of the rated voltages of the n LED light sources is less than or equal to the rated maximum output voltage of the emergency driver 2. Both the power supply driver 1 and the emergency driver 2 are purchased from the market. In this embodiment, the model of the power supply driver 1 is preferably BQE160B-260-PVF type; the model of the emergency driver 2 is preferably EBPLED14W type.

[0021] By adopting the above technical solutions, in the case of power-on, the power supply driver 1 supplies power to the light source module 3, which can output isolated drive at low voltage or non-isolated drive at high voltage. In the case of power-off, the emergency driver 2 supplies power to the n LED light sources in the light source module 3. The sum of the rated voltages of the n LED light sources is less than or equal to the rated maximum output voltage of the emergency driver 2, thus realizing the compatibility with low voltage output isolated emergency driving.

[0022] Specifically, the N terminals of both the power supply driver 1 and the emergency driver 2 are connected to the neutral wire. The L1 terminal of the emergency driver 2 is connected to the live wire. A switch SW is connected to the L1 terminal of the emergency driver 2. The L terminal of the power supply driver 1 is connected to the L2 terminal of the emergency driver 2.

[0023] By adopting the above technical solutions, the connection between the power supply driver 1 and the emergency driver 2 and the mains power is realized.

[0024] Embodiment 2

[0025] Please refer to Figure 2 , the difference between this embodiment and Embodiment 1 is that specifically, a resistor is connected in parallel to the LED light source.

[0026] By adopting the above technical solutions, when performing a high voltage test on the light source module 3 or connecting the control switch to the neutral wire, the situation that the light source module 3 emits a faint light when the control switch is turned off can be avoided.

[0027] Embodiment 3

[0028] The difference between this embodiment and Embodiment 1 is that specifically, the LED light source includes several series-connected, parallel-connected, or series-parallel-connected LED lamp beads.

[0029] By adopting the above technical solutions, it shows that the series-parallel relationship of the LED lamp beads in the LED light source does not affect the compatibility of the emergency driver 2.

[0030] In summary, in the case of power-on, the power supply driver 1 supplies power to the light source module 3, which can output isolated drive at low voltage or non-isolated drive at high voltage. In the case of power-off, the emergency driver 2 supplies power to the n LED light sources in the light source module 3, and the sum of the rated voltages of the n LED light sources is less than or equal to the rated maximum output voltage of the emergency driver 2, thus realizing the compatibility with the low-voltage output isolated emergency drive. A resistor is connected in parallel to the LED light source of the present invention to avoid the situation of slight brightness of the light source module 3 when the control switch is disconnected during high-voltage testing of the light source module 3 or when the control switch is connected to the neutral wire. The series-parallel relationship of the LED lamp beads in the LED light source of the present invention does not affect the compatibility of the emergency driver 2.

[0031] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An LED circuit compatible with high and low voltage output emergency drive, characterized in that: It includes a power drive, an emergency drive and a light source module, wherein the light source module includes m LED light sources connected in series, the LED+ end of the power drive is connected to the positive end of the light source module, the LED- end of the power drive is connected to the negative end of the light source module, the EM+ end of the emergency drive is connected to the positive end of the light source module, and the EM- end of the emergency drive is connected to the negative end of the nth LED light source of the light source module.

2. According to claim 1, the LED circuit compatible with high and low voltage output emergency drive is characterized in that: The N terminals of the power drive and the emergency drive are both connected to the neutral line, the L1 terminal of the emergency drive is connected to the live wire, and the L terminal of the power drive is connected to the L2 terminal of the emergency drive.

3. The LED circuit compatible with high and low voltage output emergency drive according to claim 1, characterized in that: Both n and m are positive integers, and m≥n.

4. The LED circuit compatible with high and low voltage output emergency drive according to claim 1, characterized in that: The sum of the rated voltages of the n LED light sources is less than or equal to the rated maximum output voltage of the emergency drive.

5. The LED circuit compatible with high and low voltage output emergency drive according to claim 1, characterized in that: The L1 end of the emergency drive is connected with a switch SW.

6. The LED circuit compatible with high and low voltage output emergency drive according to claim 1, characterized in that: The LED light source is connected in parallel with a resistor.

7. The LED circuit compatible with high and low voltage output emergency drive according to claim 1, characterized in that: The LED light source includes a plurality of LED lamp beads connected in series, in parallel or in series and in parallel.

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