DC centralized drive lighting system

Abstract

The DC centralized driving lighting system includes a constant current power supply (1), a positive electrode connection line (8), a negative electrode connection line (7), a positive electrode line I (3), a negative electrode line I (4), a positive electrode line II (5), and a negative electrode line II (6). The positive electrode of the constant current power supply (1) is connected to the positive electrode line I (3) via the positive electrode connection line (8), and the negative electrode of the constant current power supply (1) is connected to the negative electrode line II (6) via the negative electrode connection line (7). The positive electrode line II (5) is connected in parallel with the positive electrode line I (3), and the negative electrode line II (6) is connected in parallel with the negative electrode line I (4). The DC centralized driving lighting system can solve the problem of voltage drop in the intermediate LED lamps (2).

Description

[Technical Field]

[0001] This application claims priority from Chinese patent application CN202211430373.3, filed on November 16, 2022, entitled "DC Centralized Drive Lighting System," and the entire contents of said Chinese patent application are incorporated herein by reference.

[0002] The present invention relates to the field of lighting technology, in particular to a DC centrally driven lighting system. [Background technology]

[0003] Currently, the lighting light sources used in lighting systems have evolved from the early incandescent lamps, fluorescent lamps, and halogen lamps to LED lamps. LED lamps have the advantages of high light efficiency and low power consumption, and are widely used in areas such as office buildings, tunnels, and roads.

[0004] Since LED lamps are DC lamps, they are driven by DC power supplies. Lighting systems with a relatively large number of LED lamps typically use a centralized DC power supply, which is a constant current power supply and includes an AC-DC converter for converting input AC power to constant current DC power. A number of LED lamps are connected in parallel to the output circuit of the constant current power supply. During use of such lighting systems, the total stroke of each LED lamp from the constant current power supply varies, resulting in voltage drops in LED lamps far from the constant current power supply, resulting in inconsistent brightness. Therefore, in August 2018, the applicant filed a patent application entitled "Constant Current and Voltage Equalization Connection Method for LED Lamps and Adjustable LED Lamp with Low Light Loss." While this patent solved the voltage drop problem for the LEDs at the far end of the constant current power supply, the applicant discovered that during use, the voltage of the middle LED lamp was slightly lower than that of the LED lamps at both ends, creating a new voltage drop problem. For example, in Figure 1, U AB The magnitude of the voltage U between CD CD is approximately equal to the voltage U between a and b. ab is U AB Slightly smaller than. Summary of the Invention

[0005] To solve at least one of the problems in the prior art, i.e., the problem of voltage drop in intermediate LED lamps, a first aspect of the present invention provides a DC centralized driving lighting system, which includes a constant current power supply, a positive connecting wire, a negative connecting wire, a positive wire I, a negative wire I, a positive wire II, and a negative wire II, wherein the positive pole of the constant current power supply is connected to the positive wire I via the positive connecting wire, the negative pole of the constant current power supply is connected to the negative wire II via the negative connecting wire, the positive wire II is connected in parallel to the positive wire I, and the negative wire II is connected in parallel to the negative wire I.

[0006] In one embodiment of the lighting system, a plurality of LED lamps are connected in parallel between the positive and negative pole lines I and I.

[0007] In one embodiment of the lighting system, the circuit consisting of the constant current power supply, the positive connecting wire, and the positive wire I includes a first area extending from the LED closest to the constant current power supply to the LED lamp located midway among the plurality of LED lamps, and the positive wire II is connected in parallel to the positive wire I of the first area, and the positive electrodes of each LED lamp in the first area are all connected to the positive wire II.

[0008] In one embodiment of the lighting system, the circuit consisting of the constant current power supply, the negative electrode connecting wire, and the negative electrode wire I includes a second area including the middle LED lamp of the plurality of LED lamps to the LED farthest from the constant current power supply, the negative electrode wire II is connected in parallel to the negative electrode wire I of the second area, and the negative electrodes of each LED lamp in the second area are all connected to the negative electrode wire II.

[0009] In one embodiment of the lighting system, the negative electrode of the LED farthest from the constant current power supply is connected to one end of a negative electrode line II.

[0010] In one embodiment of the lighting system, the negative terminal of the constant current power supply is connected to the negative terminal of the LED that is furthest from the constant current power supply.

[0011] In one embodiment of the lighting system, the negative terminal of the constant current power supply is connected to the center of the negative terminal line II via a negative terminal connection line.

[0012] A second aspect of the present invention provides a DC concentrated drive lighting system, comprising a constant current power supply, an LED lamp, a positive electrode line I, a negative electrode line I, a positive electrode line II, a negative electrode line II, a positive electrode connecting line and a negative electrode connecting line, wherein a plurality of LED lamps are provided and the plurality of LED lamps are connected in parallel between the positive electrode line I and the negative electrode line I, the positive electrode of the constant current power supply is connected to the positive electrode line I via the positive electrode connecting line, and the negative electrode of the constant current power supply is connected to the negative electrode line II via the negative electrode connecting line; The LED lamp closest to the constant current power supply is the first LED lamp, the first region is the region from the first LED lamp to the middle LED lamp, and the second region is the region from the middle LED lamp to the last LED lamp, and the positive pole line II is connected in parallel to the positive pole line I of the first region, and the positive poles of each LED lamp in the first region are all connected to the positive pole line II; The negative electrode line II is connected in parallel to the negative electrode line I of the second area, and the negative electrodes of the LED lamps in the second area are all connected to the negative electrode line II.

[0013] Compared with the prior art, the DC concentrated driving lighting system of the present invention allows the positive and negative pole wires II to shunt the current across the LED lamps connected in parallel with them, balancing the voltage across multiple LED lamps when the LED lamps are running at a constant current, reducing the voltage drop problem in the middle LED lamp when multiple LED lamps are connected in parallel, and meeting the constant current and voltage equalization requirements of the LED lamps. [Brief explanation of the drawings]

[0014] [Figure 1] 1 is a schematic diagram of a prior art lighting system; [Figure 2] FIG. 1 is a schematic diagram of Example 1 of the present invention. [Figure 3] FIG. 2 is another schematic diagram of the first embodiment of the present invention. [Figure 4] FIG. 1 is a schematic diagram of Example 2 of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0015] The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only some of the embodiments of the present invention, not all of the embodiments, and all other embodiments obtained by those skilled in the art based on the embodiments of the present invention without any creative work fall within the scope of protection of the present invention.

[0016] As shown in Figures 2 to 4, the DC concentrated drive lighting system according to the present invention includes a constant current power supply 1, an LED lamp 2, a positive electrode line I3, a negative electrode line I4, a positive electrode line II5, a negative electrode line II6, a positive electrode connecting line 8, and a negative electrode connecting line 7, wherein the positive electrode of the constant current power supply is connected to the positive electrode line I via the positive electrode connecting line, and the negative electrode of the constant current power supply is connected to the negative electrode line II via the negative electrode connecting line, and the positive electrode line II is connected in parallel to the positive electrode line I, and the negative electrode line II is connected in parallel to the negative electrode line I.

[0017] A plurality of LED lamps are connected in parallel between the positive electrode line I and the negative electrode line I, a plurality of LED lamps 2 are provided, and the plurality of LED lamps 2 are connected in parallel between the positive electrode line I3 and the negative electrode line I4, the positive electrode of the constant current power supply 1 is connected to the positive electrode line I3 via a positive electrode connecting line 8, and the negative electrode of the constant current power supply 1 is connected to the negative electrode line II6 via a negative electrode connecting line 7.

[0018] The circuit consisting of the positive electrode connecting wire and the positive electrode wire I includes a first region that includes the LED closest to the constant current power supply to the LED lamp located in the middle of the plurality of LED lamps, and the positive electrode wire II is connected in parallel to the positive electrode wire I of the first region, and the positive electrodes of each LED lamp in the first region are all connected to the positive electrode wire II. Specifically, in one circuit on the constant current power supply side, the LED lamp 2 closest to the constant current power supply 1 is the first LED lamp 2, and the region from the first LED lamp 2 to the middle LED lamp 2 is the first region.

[0019] The circuit consisting of the constant current power supply, the negative connecting line, and the negative line I includes a second region including from the middle LED lamp of the plurality of LED lamps to the LED farthest from the constant current power supply, the negative line II is connected in parallel to the negative line I of the second region, and the negative poles of each LED lamp in the second region are all connected to the negative line II, specifically, the second region is from the middle LED lamp 2 to the last LED lamp 2, the positive line II5 is connected in parallel to the positive line I3 of the first region, and the positive poles of each LED lamp 2 in the first region are all connected to the positive line II5, the negative line II6 is connected in parallel to the negative line I4 of the second region, and the negative poles of each LED lamp 2 in the second region are all connected to the negative line II6.

[0020] Example 1 In this embodiment, the number of LED lamps 2 is 10, and the positive pole of each LED lamp 2 is connected to the positive pole line I3, and the negative pole is connected to the negative pole line I4. The system further includes a positive pole line II5, a negative pole line II6, a negative pole connection line 7, and a positive pole connection line 8. The LED lamp 2 closest to the constant current power supply 1 is the first LED lamp 2, the first LED lamp 2 to the fifth LED lamp 2 are defined as a first region, and the fifth LED lamp 2 to the tenth LED lamp 2 are defined as a second region. The positive pole line II5 is connected in parallel to the positive pole line I3 of the first region. The positive electrodes of the LED lamps 2 in the first region are all connected to the positive line II5, i.e., the positive electrodes of the first LED lamp 2 to the fifth LED lamp 2 are connected to both the positive line I3 and the positive line II5, the negative line II6 is connected in parallel to the negative line I4 of the second region, and the negative electrodes of the LED lamps 2 in the second region are all connected to the negative line II6, i.e., the negative electrodes of the fifth LED lamp 2 to the tenth LED lamp 2 are connected to both the negative line I4 and the negative line II6, and the positive electrode of the constant current power supply 1 is connected to the positive line I3 via the positive electrode connecting line 8.

[0021] The negative electrode of the LED farthest from the constant current power supply is connected to one end of negative wire II, and the negative electrode of the constant current power supply is connected to the negative electrode of the LED farthest from the constant current power supply. Specifically, the negative electrode of constant current power supply 1 is connected to the end of negative wire II6 via negative connecting wire 7, where the end refers to the end connected to the last LED lamp 2, i.e., the negative electrode of the last LED lamp 2 is connected to both negative wire I4 and negative wire II6. Of course, another connection method is for the negative electrode of constant current power supply 1 to be connected to the center of negative wire II6 via negative connecting wire 7, i.e., between the start and end of negative wire II6.

[0022] Example 2 In this embodiment, the number of LED lamps 2 is 11, and the positive pole of each LED lamp 2 is connected to the positive pole line I3, and the negative pole is connected to the negative pole line I4. The LED lamp 2 closest to the constant current power supply 1 is the first LED lamp 2, the first LED lamp 2 to the sixth LED lamp 2 are defined as a first region, and the sixth LED lamp 2 to the last LED lamp 2 are defined as a second region. The positive pole line II5 is connected in parallel to the positive pole line I3 of the first region, and the positive poles of each LED lamp 2 in the first region are all connected to the positive pole line II5. That is, the positive poles of the first LED lamp 2 to the sixth LED lamp 2 are also connected to the positive pole line II3. The negative pole of each LED lamp 2 in the second region is connected to the negative pole line II6, and the negative pole of each LED lamp 2 in the second region is connected to the negative pole line II6. That is, the negative poles of the sixth through eleventh LED lamps 2 are connected to both the negative pole line I4 and the negative pole line II6. The positive pole of the constant current power supply 1 is connected to the positive pole line I3 via the positive pole line 8. The negative pole of the LED farthest from the constant current power supply is connected to one end of the negative pole line II. Specifically, the negative pole of the constant current power supply 1 is connected to the end of the negative pole line II6 via the negative pole line 7. Of course, there is also another similar connection format, in which the negative pole of the constant current power supply 1 is connected to the center of the negative pole line II6 via the negative pole line 7, i.e., between the beginning and end of the negative pole line II6.

[0023] The above is merely an embodiment of the present invention, and does not limit the patent scope of the present invention. The conversion of equivalent structures or equivalent processes made by utilizing the contents of the specification of the present invention, or the direct or indirect application in other related technical fields, are all included in the protection scope of the present invention patent. [Explanation of symbols]

[0024] 1 Constant current power supply 2 LED lamps 3 Positive wire I 4 Negative wire I 5 Positive Wire II 6 Negative Wire II 7 Negative connecting wire 8 Positive connecting wire

Claims

1. 1. A DC concentrated drive lighting system comprising: a constant current power supply; a positive electrode connecting wire; a negative electrode connecting wire; a positive electrode wire I; a negative electrode wire I; a positive electrode wire II; and a negative electrode wire II, wherein the positive electrode of the constant current power supply is connected to the positive electrode wire I via the positive electrode connecting wire; the negative electrode of the constant current power supply is connected to the negative electrode wire II via the negative electrode connecting wire; the positive electrode wire II is connected in parallel to the positive electrode wire I; and the negative electrode wire II is connected in parallel to the negative electrode wire I.

2. 2. The DC concentrated drive lighting system according to claim 1, wherein a plurality of LED lamps are connected in parallel between the positive and negative pole lines I and II.

3. 3. The DC concentrated drive lighting system according to claim 2, wherein the circuit consisting of the constant current power supply, the positive electrode connecting line, and the positive electrode line I includes a first region including an LED lamp closest to the constant current power supply to an LED lamp located at a middle of the plurality of LED lamps, the positive electrode line II is connected in parallel to the positive electrode line I of the first region, and the positive electrodes of each LED lamp in the first region are all connected to the positive electrode line II.

4. 3. The DC concentrated drive lighting system according to claim 2, wherein the circuit consisting of the constant current power supply, the negative electrode connecting line, and the negative electrode line I includes a second region including from a middle LED lamp among the plurality of LED lamps to the LED farthest from the constant current power supply, the negative electrode line II is connected in parallel to the negative electrode line I of the second region, and the negative electrodes of each LED lamp in the second region are all connected to the negative electrode line II.

5. 5. The DC concentrated drive lighting system according to claim 4, wherein the negative electrode of the LED farthest from the constant current power supply is connected to one end of a negative electrode line II.

6. 6. The DC concentrated driving lighting system according to claim 5, wherein the negative terminal of the constant current power supply is connected to the negative terminal of the LED that is farthest from the constant current power supply.

7. 5. The DC concentrated drive lighting system according to claim 4, wherein the negative pole of the constant current power supply is connected to the center of the negative pole line II via a negative pole connecting line.

8. A DC concentrated drive lighting system including a constant current power supply, an LED lamp, a positive electrode line I, a negative electrode line I, a positive electrode line II, a negative electrode line II, a positive electrode connecting line, and a negative electrode connecting line, wherein a plurality of LED lamps are provided, and the plurality of LED lamps are connected in parallel between the positive electrode line I and the negative electrode line I, and the positive electrode of the constant current power supply is connected to the positive electrode line I via the positive electrode connecting line, and the negative electrode of the constant current power supply is connected to the negative electrode line II via the negative electrode connecting line, The LED lamp closest to the constant current power supply is the first LED lamp, the first region is the region from the first LED lamp to the middle LED lamp, and the second region is the region from the middle LED lamp to the last LED lamp, the positive electrode line II is connected in parallel to the positive electrode line I of the first region, and the positive electrodes of each LED lamp in the first region are all connected to the positive electrode line II; A DC concentrated drive lighting system, characterized in that the negative electrode line II is connected in parallel to the negative electrode line I of the second area, and the negative electrodes of each LED lamp in the second area are all connected to the negative electrode line II.

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