Lamp string assembly and lighting device

Abstract

A lamp string assembly comprises a lamp string and at least two power supply assemblies, power supply ends are arranged at the two ends of the lamp string, and the power supply end of each lamp string is electrically connected with the output end of one power supply assembly. According to the lamp string assembly, under the condition of the same lamp string, the voltage drop at the tail end of the lamp string almost does not exist, and therefore the brightness difference between lamp beads of the lamp string is reduced; in addition, the length of the lamp string can be further increased, so that the number of relay plates can be reduced, and the product cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of string light display, in particular to a string light assembly and a lighting device. Background Art

[0002] As is well known, with the continuous development of modern technology, by controlling the light-emitting color, light-emitting brightness and light-emitting frequency of the string light beads, the light-emitting effect of the string lights is improved to set off the environmental atmosphere. Generally speaking, a string of lights is formed by connecting multiple LED lights in series, so that the string of lights has a certain length. By installing the string of lights into different patterns in different places such as homes, offices, and entertainment venues, different layouts can be designed to present different lighting effects.

[0003] String lights are usually very long and have multiple sets of string lights, which are powered by a controller and an external power supply. Then, the longer the string of lights, the more insufficient the power supply voltage of the end string of lights. This is because the longer the string of lights, the greater its resistance, which in turn leads to a greater voltage drop at the end string of lights, resulting in insufficient brightness of the end string of lights and thus affecting the lighting effect.

[0004] In the power supply scheme of the string lights in the prior art, a 5V voltage adapted to the string light beads is directly output from the control box and applied to all the string lights. Its defect is that when the string of lights is relatively long, the voltage drop will be relatively large when reaching the end. At this time, the brightness of the end light beads will decrease or the lights will light up abnormally. To solve this defect, the wire diameter of the power cord or the power return wire is increased. This scheme can only improve the voltage drop problem within a certain length and cannot completely solve the situation of reduced brightness or abnormal lighting of the end string light beads caused by the voltage drop problem.

[0005] Therefore, it is necessary for the industry to provide an improved string light assembly to overcome the above defects of the prior art. Summary of the Utility Model

[0006] The purpose of the utility model is to solve the above problems and provide a string light assembly.

[0007] To meet the purpose of the utility model, the utility model adopts the following technical scheme:

[0008] A string light assembly includes a string of lights and at least two power supply components. Power supply terminals are provided at both ends of the string of lights, and the power supply terminal of each string of lights is electrically connected to the output terminal of one of the power supply components.

[0009] Preferably, each of the power supply components includes: an input terminal for accessing an input power supply; and a power conversion unit electrically connected to the input terminal. Preferably, each of the power conversion units includes a DCDC conversion circuit, and each of the DCDC conversion circuits has a positive output terminal and a negative output terminal; the power supply terminals of each of the lamp strings include a positive terminal and a negative terminal, and the positive terminal and the negative terminal of the lamp string are respectively and electrically connected to the positive output terminal and the negative output terminal of the DCDC conversion circuit.

[0010] Preferably, a one-way current guiding circuit is provided between the positive output terminal of each of the DCDC conversion circuits and the positive terminal of the lamp string, and the one-way current guiding circuit is configured to only allow current to flow from the corresponding positive output terminal to the positive terminal of the lamp string.

[0011] Preferably, the input terminal has a positive connection terminal and a negative connection terminal; each of the DCDC conversion circuits also has a positive input terminal and a negative input terminal; the positive connection terminal is electrically connected to the positive input terminal of each of the DCDC conversion circuits, and the negative connection terminal is electrically connected to the negative input terminal of each of the DCDC conversion circuits.

[0012] Preferably, the one-way current guiding circuit includes a Schottky diode, the positive electrode of the Schottky diode is electrically connected to the positive output terminal of the DCDC conversion circuit, and the negative electrode of the Schottky diode is electrically connected to the positive terminal of the lamp string.

[0013] Preferably, the lamp string assembly has a plurality of the power supply components and a plurality of the lamp strings; one of the lamp strings is arranged between every two of the power supply components.

[0014] Preferably, each of the DCDC conversion circuits further includes: an input filter circuit; a voltage dividing circuit electrically connected to the output terminal of the input filter circuit; a DCDC conversion chip electrically connected to the output terminal of the voltage dividing circuit; a bootstrap circuit electrically connected to the self-boosting terminal of the DCDC conversion chip; an output filter circuit electrically connected to the output terminal of the DCDC conversion chip; a spike current absorption circuit electrically connected to the bootstrap circuit; a feedback circuit electrically connected to the output terminal of the output filter circuit and the feedback terminal of the DCDC conversion chip; and a one-way conduction circuit electrically connected to the output terminal of the output filter circuit.

[0015] Meanwhile, a lighting device is provided, which includes the above-mentioned lamp string assembly and an input power supply for supplying power to the lamp string assembly.

[0016] Preferably, the lighting device further includes a control box, and the control box is electrically connected to the lamp string assembly for controlling the lighting effect of the lamp string assembly.

[0017] Compared with the prior art, the beneficial technical effects of the present utility model are as follows:

[0018] In the string of lights assembly provided by the present utility model, since the string of lights assembly includes a string of lights and at least two power supply assemblies, power supply terminals are provided at both ends of the string of lights, and each power supply terminal is electrically connected to the output terminal of one of the power supply assemblies. This means that each string of lights is powered by two power supply assemblies simultaneously. Therefore, in the case of the same string of lights, the voltage drop at the end of the string of lights is almost non-existent, thereby reducing the brightness difference between the light beads of the string of lights. In addition, the length of the string of lights can be further extended, theoretically about twice that of the prior art, thereby reducing the number of relay boards and greatly reducing the product cost.

[0019] Additional aspects and advantages of the present utility model will be given in part in the following description, and these will become apparent from the following description or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the drawings, in which:

[0021] Figure 1 is a functional block diagram of a string of lights assembly according to an embodiment of the present utility model.

[0022] Figure 2 is a circuit diagram of a power conversion unit of a string of lights assembly according to an embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0024] Those skilled in the art can understand that, unless specifically stated otherwise, the singular forms "a", "an", "the" and "said" used herein may also include the plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model means the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or their groups. It should be understood that when we say an element is "connected" or "coupled" to another element, it can be directly connected or coupled to other elements, or there may also be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The phrase "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0025] Those skilled in the art can understand that, unless otherwise defined, all terms used herein (including technical terms and scientific terms) have the same meaning as the general understanding of those of ordinary skill in the art to which the present utility model belongs. It should also be understood that terms such as those defined in a general dictionary should be understood to have a meaning consistent with the meaning in the context of the prior art, and will not be interpreted with an idealized or overly formal meaning unless specifically defined as herein.

[0026] According to an embodiment of the present utility model, referring to Figure 1-2 , a string light assembly 100 is provided: including a string light 40 and at least two power supply components, power supply terminals are provided at both ends of the string light 40, and the power supply terminal of each string light 40 is electrically connected to the output terminal of one of the power supply components.

[0027] In the above embodiment, the string light 40 generally includes a plurality of lamp beads (not labeled) that are physically and electrically connected to each other. The plurality of lamp beads of the string light 40 can have different attributes, such as can display different colors and / or brightness; and can be controlled by an external control system to produce a sequential lighting or flashing effect between different lamp beads of each string light 40 in time sequence.

[0028] And, there can be a plurality of string lights 40. Under the control of an external control system, each lamp bead flashes or switches in a certain order and frequency in time according to a pre-compiled program and scheme, so as to form a dynamic lighting effect, and the string lights 40 can be arranged in a specific shape, such as a five-pointed star, a heart pattern, or even can be arranged in a specific English word or Chinese character to convey specific information to the user.

[0029] In the above embodiments, since each lamp string 40 includes a lamp string and at least two power supply components, power supply terminals are provided at both ends of the lamp string, and each power supply terminal is electrically connected to the output terminal of one of the power supply components. In other words, each lamp string is powered by two power supply components simultaneously. Therefore, in the case of the same lamp string, the voltage drop at the end of the lamp string is almost zero, thereby reducing the brightness difference between the lamp beads of the lamp string. In addition, the length of the lamp string can be further extended, thereby reducing the number of relay boards and greatly reducing the product cost.

[0030] Preferably, each of the power supply components includes: an input terminal 20 for connecting to an input power supply; and a power conversion unit 10 electrically connected to the input terminal 20. By providing the input terminal 20, the power supply component can be conveniently and safely connected to an external input power supply, thereby saving assembly time and improving assembly efficiency. The power conversion unit 10 is used to convert the voltage provided by the external input power supply from alternating current to direct current and reduce the voltage to the parameter range required by the lamp string 40.

[0031] In one embodiment, each of the power conversion units 10 may include a DCDC conversion circuit 12. Each DCDC conversion circuit 12 is used to convert alternating current to direct current and reduce the voltage, and it can adopt any circuit known in the industry, which is not limited in the present invention. Here, the DCDC conversion circuit 12 has a positive output terminal 126 and a negative output terminal 128; the power supply terminals of each lamp string 40 include a positive terminal and a negative terminal, and the positive terminal and the negative terminal of the lamp string 40 are respectively electrically connected to the positive output terminal 126 and the negative output terminal 128 of the DCDC conversion circuit 12.

[0032] In addition, a one-way current guiding circuit 50 is provided between the positive output terminal 126 of each DCDC conversion circuit 12 and the positive terminal of the lamp string 40. The one-way current guiding circuit 50 is configured to only allow current to flow from the corresponding positive output terminal 126 to the positive terminal of the lamp string 40. The function of setting the one-way current guiding circuit 50 is to prevent the current provided by each power supply component from flowing through the lamp string 40 and into another power supply component, thereby forming crosstalk. The one-way current guiding circuit 50 can be, for example, a Schottky diode 50. The positive electrode of the Schottky diode 50 is electrically connected to the positive output terminal of the DCDC conversion circuit, and the negative electrode of the Schottky diode is electrically connected to the positive terminal of the lamp string.

[0033] Preferably, the input terminal 20 has a positive connection end 22 and a negative connection end 24; each DCDC conversion circuit 12 correspondingly has a positive input end 122 and a negative input end 124; the positive connection end 22 is electrically connected to the positive input end 122 of each DCDC conversion circuit 12, and the negative connection end 24 is electrically connected to the negative input end 124 of each DCDC conversion circuit 12. Through the connection between the above-mentioned terminals, the conduction of the circuit can be quickly realized, greatly improving the assembly efficiency and also enhancing the safety.

[0034] According to an embodiment, the lamp string assembly 100 may have a plurality of the power supply assemblies and a plurality of the lamp strings 40; one lamp string 40 is arranged between every two power supply assemblies. In other words, each lamp string 40 is arranged between two adjacent power supply assemblies and is powered by these two power supply assemblies simultaneously. For example, by arranging two power supply assemblies in parallel, the power supply to a single lamp string 40 can be realized simultaneously, so as to ensure that each lamp string 40 has sufficient supply voltage and the voltage at both ends of the lamp string 40 at the tail end will not be insufficient as the number of lamp strings 40 continuously increases.

[0035] As Figure 2 shown, each DCDC conversion circuit 12 may further include: an input filter circuit 201; a voltage dividing circuit 202 electrically connected to the output end of the input filter circuit 201; a DCDC conversion chip 203 electrically connected to the output end of the voltage dividing circuit 202; a bootstrap circuit 204 electrically connected to the self-boosting end of the DCDC conversion chip 203; an output filter circuit electrically connected to the output end of the DCDC conversion chip 203; a spike current absorption circuit 205 electrically connected to the bootstrap circuit 204; a feedback circuit 207 electrically connected to the output end of the output filter circuit and the feedback end of the DCDC conversion chip 203; and a one-way conduction circuit 208 electrically connected to the output end of the output filter circuit.

[0036] Among them, the input filter circuit 201 is used to filter the input voltage. The voltage dividing circuit 202 is used to divide the filtered voltage through, for example, the setting of multiple resistors, so as to reduce the voltage at the rear end. The DCDC conversion chip 203 is used to realize the conversion of voltage attributes, such as rectifying alternating current into direct current or inverting direct current into alternating current. The bootstrap circuit 204 is used to realize the bootstrap function of the whole circuit. The spike current absorption circuit 205 is used to protect the rear-end circuit from spike current, so as to avoid damaging the rear-end electronic components. The one-way conduction circuit 208 is used to realize the effect of unidirectional conduction of the circuit and avoid damage to the power supply assembly caused by reverse current.

[0037] In one embodiment, the input filter circuit 201 may include a plurality of capacitors connected in parallel with each other. The capacitors are used to achieve a filtering effect. Preferably, the capacitors are ceramic capacitors or electrolytic capacitors. These two types of capacitors have stable working performance, good filtering effect, long service life, and low price.

[0038] Preferably, there is an output power supply negative line 64 between the negative output terminal 128 of each DCDC conversion circuit 12 and the lamp string 40. The feedback resistance circuit 207 includes a plurality of feedback resistors and feedback capacitors. Further preferably, the value range of the feedback capacitor is between 80 - 100 PF. The feedback capacitor within this value range has good feedback characteristics and response characteristics, and has a fast feedback speed and high feedback accuracy.

[0039] The present utility model also provides an illumination device, including the above-mentioned lamp string assembly and an input power supply for supplying power to the lamp string assembly. In addition, the illumination device further includes a control box, which is electrically connected to the lamp string assembly and is used to control the lighting effect of the lamp string assembly.

[0040] Those skilled in the art of the present technology can understand that the various operations, methods, steps, measures, and solutions in the processes discussed in this application can be alternated, changed, combined, or deleted. Further, other steps, measures, and solutions in the various operations, methods, and processes discussed in this application can also be alternated, changed, rearranged, decomposed, combined, or deleted. Further, those in the prior art having steps, measures, and solutions in the various operations, methods, and processes disclosed in this application can also be alternated, changed, rearranged, decomposed, combined, or deleted.

[0041] The above are only some embodiments of this application. It should be noted that for those of ordinary skill in the art of the present technology, without departing from the principle of this application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this application.

Claims

1. A string of lights assembly, characterized in that: It includes a string of lights and at least two power supply components. Power supply terminals are provided at both ends of the string of lights, and the power supply terminal of each string of lights is electrically connected to the output terminal of one of the power supply components; each power conversion unit includes a DCDC conversion circuit, and each DCDC conversion circuit has a positive output terminal and a negative output terminal; the power supply terminal of each string of lights includes a positive terminal and a negative terminal, and the positive terminal and the negative terminal of the string of lights are respectively and correspondingly electrically connected to the positive output terminal and the negative output terminal of the DCDC conversion circuit.

2. The lamp string assembly according to claim 1, wherein: Each of the power supply components includes: an input terminal for accessing an input power supply; and a power conversion unit electrically connected to the input terminal.

3. The string of lights assembly according to claim 2, wherein: A one-way current guiding circuit is provided between the positive output terminal of each DCDC conversion circuit and the positive terminal of the string of lights, and the one-way current guiding circuit is configured to only allow current to flow from the corresponding positive output terminal to the positive terminal of the string of lights.

4. The lamp string assembly according to claim 3, wherein: The input terminal has a positive connection terminal and a negative connection terminal; each DCDC conversion circuit also has a positive input terminal and a negative input terminal; the positive connection terminal is electrically connected to the positive input terminal of each DCDC conversion circuit, and the negative connection terminal is electrically connected to the negative input terminal of each DCDC conversion circuit.

5. The lamp string assembly according to claim 3, wherein: The one-way current guiding circuit includes a Schottky diode, the positive electrode of the Schottky diode is electrically connected to the positive output terminal of the DCDC conversion circuit, and the negative electrode of the Schottky diode is electrically connected to the positive terminal of the string of lights.

6. The lamp string assembly according to claim 1, wherein: The string of lights assembly has a plurality of the power supply components and a plurality of the strings of lights; one string of lights is provided between every two of the power supply components.

7. The lamp string assembly according to claim 4, wherein: Each DCDC conversion circuit further includes: an input filter circuit; a voltage dividing circuit electrically connected to the output terminal of the input filter circuit; a DCDC conversion chip electrically connected to the output terminal of the voltage dividing circuit; a bootstrap circuit electrically connected to the self-boosting terminal of the DCDC conversion chip; an output filter circuit electrically connected to the output terminal of the DCDC conversion chip; a peak current absorption circuit electrically connected to the bootstrap circuit; a feedback circuit electrically connected to the output terminal of the output filter circuit and the feedback terminal of the DCDC conversion chip; and a one-way conduction circuit electrically connected to the output terminal of the output filter circuit.

8. A lighting device, characterized in that: It includes the string of lights assembly according to any one of claims 1-7 and an input power supply for supplying power to the string of lights assembly.

9. The lighting device according to claim 8, wherein: It further includes a control box, and the control box is electrically connected to the string of lights assembly for controlling the lighting effect of the string of lights assembly.

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