A direct current centralized driving lighting system

Abstract

The application discloses a direct current centralized driving lighting system, which comprises a constant current power supply, LED lamps, a positive line I, a negative line I, a positive line II, a negative line II, a positive connecting line and a negative connecting line. The LED lamps are arranged in multiple numbers, and the multiple LED lamps are connected in parallel between the positive line I and the negative line I. The positive pole of the constant current power supply is connected with the positive line I through the positive connecting line, and the negative pole of the constant current power supply is connected with the negative line II through the negative connecting line. The LED lamp closest to the constant current power supply is regarded as a first LED lamp, the first LED lamp to the middle LED lamp is regarded as a first area, and the middle LED lamp to the last LED lamp is regarded as a second area. The application solves the problem of voltage drop of the middle LED lamp in the prior art.

Description

Technical Field

[0001] This invention relates to the field of lighting technology, and more specifically to a DC centralized drive lighting system. Background Technology

[0002] Currently, the light sources used in lighting systems have evolved from early incandescent lamps, fluorescent lamps, and halogen lamps to LED lamps. LED lamps have advantages such as high luminous efficiency and low power consumption, and are widely used in office buildings, tunnels, roads, and other areas.

[0003] LED lights are DC lamps, therefore their driving power supply is DC. In lighting systems with many LED lights, a centralized DC driving power supply is used. This centralized DC driving power supply is a constant current power supply and is equipped with an AC-DC converter to convert the input AC power into constant current DC power. Multiple LED lights are connected in parallel to the output circuit of the constant current power supply. During the use of this lighting system, it is often found that due to the different total path lengths of the lines from each LED light to the constant current power supply, LED lights farther from the constant current power supply experience voltage drops, leading to inconsistent brightness. To address this, the applicant applied for a patent on August 2, 2018, entitled "A Constant Current Voltage Equalization Connection Method for LED Lights and a Dimmable, Low-Loss LED Light." This patent solved the voltage drop problem for LEDs at the far end of the constant current power supply. However, during use, it was found that the voltage of the middle LED lights was slightly lower than that of the LED lights at the ends, creating a new voltage drop problem. Figure 1 Middle,U AB The magnitude is approximately equal to the voltage U between CDs. CD The voltage Uab between ab and b is slightly less than U. AB . Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides a DC centralized driving lighting system to solve the problem of voltage drop of the intermediate LED lamp in the prior art.

[0005] The technical solution adopted in this invention is as follows: a DC centralized driving lighting system is provided, including a constant current power supply, LED lights, positive line I, negative line I, positive line II, negative line II, positive connection wire and negative connection wire, multiple LED lights are provided, and multiple LED lights are connected in parallel between positive line I and negative line I. The positive terminal of the constant current power supply is connected to positive line I through the positive connection wire, and the negative terminal of the constant current power supply is connected to negative line II through the negative connection wire.

[0006] The LED closest to the constant current power supply is designated as the first LED. The area from the first LED to the middle LED is designated as the first zone, and the area from the middle LED to the last LED is designated as the second zone. Positive line II is connected in parallel with positive line I of the first zone, and the positive terminal of each LED in the first zone is connected to positive line II.

[0007] Negative wire II is connected in parallel with negative wire I in the second zone, and the negative terminal of each LED in the second zone is connected to negative wire II.

[0008] As a preferred embodiment of this technical solution, the negative terminal of the constant current power supply is connected to the tail end of the negative terminal line II via a negative terminal connection line, where the tail end refers to the end where the negative terminal of the last LED is connected.

[0009] Compared with the prior art, the DC centralized driving lighting system of the present invention can shunt the current across the LED lamps connected in parallel with the positive line II and the negative line II. Under the condition of constant current of the LED lamps, the voltage across the LED lamps tends to be balanced, reducing the voltage drop problem of the middle LED lamp when multiple LED lamps are connected in parallel, and achieving the constant current and voltage equalization requirements of the LED lamps. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a lighting system based on existing technology.

[0011] Figure 2 This is a schematic diagram of Embodiment 1 of the present invention.

[0012] Figure 3 This is another schematic diagram of Embodiment 1 of the present invention.

[0013] Figure 4 This is a schematic diagram of Embodiment 2 of the present invention.

[0014] In the diagram, 1 is a constant current power supply, 2 is an LED light, 3 is positive line I, 4 is negative line I, 5 is positive line II, 6 is negative line II, 7 is negative connection, and 8 is positive connection. Detailed Implementation

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 2-4As shown, the present invention provides a DC centralized driving lighting system, including a constant current power supply 1, LED lights 2, positive line I 3, negative line I 4, positive line II 5, negative line II 6, positive connection 8, and negative connection 7. Multiple LED lights 2 are provided and connected in parallel between positive line I 3 and negative line I 4. The positive terminal of the constant current power supply 1 is connected to the positive line I 3 through the positive connection 8, and the negative terminal of the constant current power supply 1 is connected to the negative line II 6 through the negative connection 7. In one circuit on the side of the constant current power supply, the LED 2 closest to the constant current power supply 1 is designated as the first LED 2. The first LED 2 to the middle LED 2 form the first zone, and the middle LED 2 to the last LED 2 form the second zone. The positive line II 5 is connected in parallel with the positive line I 3 of the first zone, and the positive terminal of each LED 2 in the first zone is connected to the positive line II 5. The negative line II 6 is connected in parallel with the negative line I 4 of the second zone, and the negative terminal of each LED 2 in the second zone is connected to the negative line II 6.

[0017] Example 1

[0018] In this embodiment, there are ten LEDs 2. The positive terminal of each LED 2 is connected to the positive line I3, and the negative terminal is connected to the negative line I4. The system also includes a positive line II5, a negative line II6, a negative connection 7, and a positive connection 8. The LED 2 closest to the constant current power supply 1 is designated as the first LED 2. The first to fifth LEDs 2 constitute the first zone, and the fifth to tenth LEDs 2 constitute the second zone. The positive line II5 is connected in parallel with the positive line I3 of the first zone, and the positive terminal of each LED 2 in the first zone is connected to the positive line II5. The positive terminal of LED 2 is connected to positive line I3 and also to positive line II5; negative line II6 is connected in parallel with negative line I4 of the second zone, and the negative terminal of each LED 2 in the second zone is connected to negative line II6, that is, the negative terminals of the fifth to tenth LEDs are connected to negative line I4 and also to negative line II6; the positive terminal of constant current power supply 1 is connected to positive line I3 through positive line 8, and the negative terminal of constant current power supply 1 is connected to the tail end of negative line II6 through negative line 7. The tail end refers to the end connected to the last LED 2, that is, the negative terminal of the last LED 2 is connected to negative line I4 and also to negative line II6. Of course, another connection method is that the negative terminal of constant current power supply 1 is connected to the middle of negative line II6 through negative line 7, that is, between the beginning and end of negative line II6.

[0019] Example 2

[0020] In this embodiment, there are eleven LEDs 2. The positive terminal of each LED 2 is connected to the positive line I3, and the negative terminal is connected to the negative line I4. The LED 2 closest to the constant current power supply 1 is designated as the first LED 2. The first to the sixth LEDs 2 constitute the first zone, and the sixth to the last LED 2 constitute the second zone. The positive line II5 is connected in parallel with the positive line I3 of the first zone, and the positive terminal of each LED 2 in the first zone is connected to the positive line II5. The positive terminals of LEDs 2 through 6 are connected to positive line I3 and also to positive line II5; negative line II6 is connected in parallel with negative line I4 in the second zone, and the negative terminal of each LED 2 in the second zone is connected to negative line II6, that is, the negative terminals of LEDs 6 through 11 are connected to negative line I4 and also to negative line II6; the positive terminal of constant current power supply 1 is connected to positive line I3 through positive line 8, and the negative terminal of constant current power supply 1 is connected to the tail end of negative line II6 through negative line 7. Alternatively, the negative terminal of constant current power supply 1 can be connected to the middle of negative line II6 through negative line 7, that is, between the beginning and end of negative line II6.

[0021] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A direct current centralized drive lighting system, characterized by: It includes a constant current power supply, LED lights, positive line I, negative line I, positive line II, negative line II, positive connection wire and negative connection wire. Multiple LED lights are set and connected in parallel between positive line I and negative line I. The positive terminal of the constant current power supply is connected to positive line I through the positive connection wire. The LED closest to the constant current power supply is designated as the first LED. The first LED to the middle LED is designated as the first zone, and the middle LED to the last LED is designated as the second zone. Positive line II is connected in parallel with positive line I of the first zone, and the positive terminal of each LED in the first zone is connected to positive line II. Negative line II is connected in parallel with negative line I of the second zone, and the negative terminal of each LED in the second zone is connected to negative line II. The negative terminal of the constant current power supply is connected to the tail end of negative line II via a negative connection wire. This tail end refers to the end connected to the last LED.

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