CN212408349U

CN212408349U - High-voltage LED lamp strip capable of being freely cut and cutting application structure thereof

Info

Publication number: CN212408349U
Application number: CN202020721366.9U
Authority: CN
Inventors: 叶祖铃
Original assignee: Guangzhou Jinpei Electrical Appliance Co ltd
Current assignee: Guangzhou Jinpei Electrical Appliance Co ltd
Priority date: 2020-05-06
Filing date: 2020-05-06
Publication date: 2021-01-26
Anticipated expiration: 2030-05-06

Abstract

The utility model discloses a can freely tailor high-pressure LED lamp area and tailor application structure thereof can solve current LED lamp area at least and tailor one of inconvenient, the higher or serious problem that generates heat of cost. When the light-emitting unit of the lamp strip needs to be cut off, the external constant-current IC is selectively connected with the positive lead, the transition lead or the negative lead on the lamp strip, so that the cut-off light-emitting unit can form a loop after being connected with a power supply; the external constant-current IC can keep the current stable, so that high-voltage lamp beads are not needed, and low-voltage lamp beads with lower cost can be selected; and the external constant current IC is not directly arranged on the flexible circuit board, so that the problem of heat generation is not needed to be worried about.

Description

High-voltage LED lamp strip capable of being freely cut and cutting application structure thereof

Technical Field

The utility model relates to a LED lamp area technical field especially relates to a high-pressure LED lamp area that can freely tailor and tailor application structure thereof.

Background

The flexible high-voltage LED patch lamp strip (LED flexible lamp strip) has the characteristics of high brightness, long service life, saving, environmental protection and the like, and is widely applied to the decorative lighting market, such as lighting places such as signboards, caption advertisements, building outline sketching, indoor ceiling lighting, automobile body interior decoration and the like. Generally, a high-voltage LED strip is shipped in a long roll, wherein one specification is 100 meters in a roll; each LED light-emitting circuit unit on the LED lamp strip is the smallest independent working unit, and is generally 1 meter; in other words, when cutting the LED strip, the most suitable length cannot be selected according to the specific use case.

For short shearing of a high-voltage LED lamp strip, the short shearing is generally realized by using an LED lamp bead and a linear constant-current IC full-string working circuit in the market, namely, a plurality of short shearing units are connected in parallel in one-meter independent working unit, and a plurality of LED lamp beads are connected in series in each short shearing unit and a linear constant-current IC is connected in series; because the high-voltage lamp strip directly rectifies 220V to supply power to the lamp strip, if the lamp strip is cut in a short distance, the number of the cut lamp beads is small, so that the series total voltage drop of the lamp beads and the difference between 220V direct current are far, great loss is generated, and heat is great, therefore, high-voltage LED lamp beads (such as 18V or 12V or 9V lamp beads) are generally used; this approach has several disadvantages: 1. the short-distance one-shearing cannot be carried out, because the number of lamp beads cannot be too small, otherwise the constant-current IC loss is large, the temperature is high, and the shortest distance is about 10-20 cm; 2. the circuit structure causes high cost due to the high-voltage lamp beads and the constant-current IC; 3. the universal power supply without stroboflash (a nonlinear constant voltage power supply, generally the voltage is constant at about 210V) and the economic power supply directly powered by 220V rectification (generally the peak voltage of 310V is output), otherwise, the power supply does not work without stroboflash, or the IC is large in loss and high in temperature when the economic power supply supplies power, so that the service life of the lamp strip is influenced; 4. when one of the lamp beads is burnt out, the whole LED working circuit connected in series does not work.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a can freely tailor high-pressure LED lamp area and tailor application structure thereof can solve one of the inconvenient, power commonality, the higher or serious problem that generates heat of current LED lamp area at least and tailor.

The technical scheme of the utility model on the one hand is so realized:

the utility model provides a high-pressure LED lamp area that can freely tailor, includes the flexible circuit board, be equipped with a plurality of luminescence unit along length direction equispaced on the flexible circuit board, include: each light-emitting unit comprises a positive electrode lead, a negative electrode lead and a transition lead, wherein the positive electrode lead, the negative electrode lead and the transition lead are integrated on the flexible circuit board along the length direction, a plurality of LED working circuits are arranged on the transition lead, and each LED working circuit comprises LED lamp beads which are connected in series and/or in parallel; the head end of the transition lead is connected with the positive lead through a first conductive lead, and the tail end of the transition lead is connected with the negative lead through a second conductive lead; current flows from the head end to the tail end.

As a further alternative to the freely cuttable high voltage LED strip, the high voltage LED strip is connected to a 220V dc power supply.

As a further alternative of the freely-cuttable high-voltage LED light strip, the LED working circuit includes a plurality of LED lamp groups connected in series, and each LED lamp group includes two LED lamp beads connected in parallel.

As a further alternative of the freely cuttable high-voltage LED strip, the LED operating circuit further comprises a current limiting resistor connected in series with the LED lamp set.

The technical scheme on the other hand of the utility model is realized like this:

a cutting application structure of a high-voltage LED lamp strip capable of being cut freely is used for cutting a light emitting unit from the high-voltage LED lamp strip and comprises an external constant-current IC, wherein the external constant-current IC is integrated with a constant-current circuit and is connected with a positive lead and a transition lead at the cut part of the light emitting unit or connected with a negative lead and a transition lead at the cut part of the light emitting unit; the cut light-emitting units can form a loop after being connected with a power supply.

As a further alternative of the cutting application structure of the freely-cut high-voltage LED strip, the cutting point is between the two LED working circuits.

As a further alternative of the cutting application structure of the freely-cuttable high-voltage LED strip, the flexible circuit board is coated with a coating layer, the coating layer is provided with a plurality of conductive pieces, and the conductive pieces are arranged at the head end and the tail end of the working circuit and are connected with the positive wire, the negative wire and the transition wire; the external constant-current IC is in fit contact with the conductive piece to realize current communication.

As a further alternative of the cutting application structure of the freely-cuttable high-voltage LED strip, the conductive member is a copper foil.

As a further alternative of the cutting application structure of the high-voltage LED strip capable of being freely cut, the external constant-current IC is disposed in a plastic shell, and a strip connector is disposed on the plastic shell to fixedly connect the external constant-current IC and the copper foil.

As a further alternative of the cutting application structure of the freely-cutting high-voltage LED strip, the external constant-current IC is fixed on the heat-dissipating aluminum plate.

The beneficial effects of the utility model are that: when the light-emitting unit of the lamp strip needs to be cut off, the external constant-current IC is selectively connected with the positive lead, the transition lead or the negative lead on the lamp strip, so that the cut-off light-emitting unit can form a loop after being connected with a power supply; the external constant-current IC can keep the current stable, so that high-voltage lamp beads are not needed, and low-voltage lamp beads with lower cost can be selected; the external constant-current IC is not directly arranged on the flexible circuit board, so that the problem of heating is not needed to be worried about; the number of the constant current ICs is less, even can be as few as one, so that the cost is effectively reduced; compared with the original LED lamp bead and the linear constant-current IC full-string working circuit, the circuit structure is simpler.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of the cut lamp strip connected with an external constant-current IC;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic diagram of a circuit structure of the light emitting unit;

FIG. 4 is one of schematic circuit diagrams of the circuit structure of the cut light-emitting unit connected with an external constant current IC;

fig. 5 is a second schematic diagram of a circuit structure of the cut light-emitting unit connected with an external constant current IC.

In the figure: 1. a flexible circuit board; 11. a conductive member; 2. a light emitting unit; 21. a positive electrode lead; 22. a negative electrode lead; 23. a transition wire; 24. a first conductive lead; 25. a second conductive lead; 3. an LED operating circuit; 31. an LED lamp group; 311. LED lamp beads; 32. a current limiting resistor; 4. an external constant current IC; 5. a plastic housing; 51. a light strip connector; 6. a power source.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may mean that the first feature is directly above or obliquely above the second feature, or that only the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Referring to fig. 1 to 5, a high voltage LED strip capable of being freely cut and a cutting application structure thereof are shown, wherein the high voltage LED strip includes a flexible circuit board 1, and a plurality of light emitting units 2 are arranged on the flexible circuit board 1 at equal intervals along the length direction, including: each light-emitting unit 2 comprises a positive electrode lead 21, a negative electrode lead 22 and a transition lead 23 which are integrated on the flexible circuit board 1 along the length direction, a plurality of LED working circuits 3 are arranged on the transition lead 23, and each LED working circuit 3 comprises LED lamp beads 311 which are connected in series and/or in parallel; the head end of the transition wire 23 is connected with the positive wire 21 through a first conductive lead 24, and the tail end of the transition wire 23 is connected with the negative wire 22 through a second conductive lead 25; current flows from the head end to the tail end. In addition, the high-voltage LED lamp is connected with a 220V direct-current power supply 6.

Specifically, when the high-voltage LED strip is actually applied, if the required length of the strip is an integral multiple of the length of the light-emitting unit 2, the light-emitting unit 2 does not need to be cut off from the strip, and the high-voltage LED strip is used according to a general using method; referring to the schematic circuit structure of the light emitting unit 2 shown in fig. 3, the light strip has a plurality of light emitting units 2, and the positive electrode wire 21 and the negative electrode wire 22 of each light emitting unit 2 are connected to the positive electrode wire 21 and the negative electrode wire 22 of the adjacent light emitting unit 2, that is, the light emitting units 2 are connected in parallel; a 220V direct current power supply 6 is connected to the lamp belt, the voltage borne by each light-emitting unit 2 is 220V, and a plurality of LED working circuits 3 connected in series on each light-emitting unit 2 bear 220V together; the positive lead 21 is connected with the positive pole of the power supply 6, and the negative lead 22 is connected with the negative pole of the power supply 6; when the circuit of the light emitting unit 2 is complete, the current is connected from the positive electrode wire 21 to the transition wire 23 through the first conductive lead 24, then passes through the LED working circuit 3 on the transition wire 23, and finally returns to the negative electrode wire 22 through the second conductive lead 25 to form a loop. The LED working circuit 3 comprises a plurality of LED lamp groups 31 connected in series, and each LED lamp group 31 comprises two LED lamp beads 311 connected in parallel; therefore, even if one LED lamp bead 311 is burnt out, the whole LED working circuit 3 does not work; in order to make the light emitting unit 2 capable of more easily withstanding 220V, the LED operating circuit 3 further includes a current limiting resistor 32 connected in series with the LED lamp set 31.

When the required length of the lamp strip is not integral multiple of the length of the light-emitting unit 2, the light-emitting unit 2 needs to be cut off from the lamp strip, and after the light-emitting unit 2 is cut off, the first half section of the light-emitting unit 2 is provided with the first conductive lead 24 but lacks the second conductive lead 25, and a loop cannot be formed after power connection; the second half of the light emitting unit 2 has the second conductive lead 25 but lacks the first conductive lead 24, and cannot form a loop after being connected with electricity. Referring to fig. 1, 2 and 4, a cutting application structure of a freely-cuttable high-voltage LED light strip is shown, which includes an external constant current IC4, the external constant current IC4 integrates a constant current circuit, the external constant current IC4 is connected to a cut portion of a front half section of a cut light-emitting unit 2, and the external constant current IC4 is connected to a negative electrode lead 22 and a transition lead 23 of the cut portion of the light-emitting unit 2; on one hand, the external constant current IC4 replaces the second conductive lead 25, so that the cut light-emitting unit 2 can form a loop after being connected with the power supply 6; on the other hand, the LED lamp can play a constant current role, so that the incomplete light-emitting unit 2 can bear the high voltage of 220V, and the LED lamp beads 311 are prevented from being burnt out; and the constant current IC is arranged externally, so that the problem of serious heating of the constant current IC can be avoided compared with the case that the constant current IC is arranged on the flexible circuit board 1. On the contrary, referring to fig. 1, fig. 2 and fig. 5, another cutting application structure of a high-voltage LED strip that can be cut freely is shown, which includes an external constant current IC4, the external constant current IC4 integrates a constant current circuit, the external constant current IC4 is connected to the cut position of the second half section of the cut light-emitting unit 2, and the external constant current IC4 is connected to the positive electrode lead 21 and the transition lead 23 of the cut light-emitting unit 2. The external constant current IC may be a single-channel LED constant current driving control chip of SM2082ED model of shenzhen mingming microelectronics ltd, or may be another IC having a constant current function.

In some specific embodiments, although theoretically, the external constant current IC4 can bear a high voltage of 220V even if only one LED lamp bead 311 is connected thereto; but is safer and more secure; referring to fig. 1 and 2, the cut-off is between the two LED operating circuits; wherein each operating circuit preferably comprises three LED lamp groups 31 and a current limiting resistor 32; therefore, the length of each working circuit on the lamp strip is about 5 cm approximately, and the requirement of free cutting of the length of the lamp strip in practical application can be met.

In the above solution, in order to connect the external constant current IC4 to the cutting position of the light emitting unit 2, referring to fig. 1 and fig. 2, the flexible circuit board 1 is coated with a coating layer, the coating layer is provided with a plurality of conductive pieces 11, and the conductive pieces 11 are arranged at the head end and the tail end of the working circuit and are connected to the positive lead 21, the negative lead 22 and the transition lead 23; the external constant current IC4 realizes current communication by being in contact with the conductive member 11 in a fitting manner. Wherein, the conductive member 11 is a copper foil. The external constant-current IC4 is arranged in a plastic shell 5, and the plastic shell 5 is provided with a lamp strip connector 51 to realize the fixed connection of the external constant-current IC4 and the copper foil. Thus, the external constant current IC4 can be quickly connected to the cutting position of the light emitting unit 2 through the light strip connector 51. It should be noted that the coating layer is coated on the flexible circuit board 1 to protect the circuit structure on the flexible circuit board 1, which is a method of a conventional light strip, and the conductive member 11 is equivalent to an electrical contact of the circuit structure of the flexible circuit board 1; in addition, the conventional light strip connector 51 structure can be selected as the light strip connector 51, and the electrical contact on the external constant current IC4 can be fixed and attached to the copper foil, so that the structure is not described in detail herein.

In the above scheme, in order to further accelerate the heat dissipation of the external constant current IC4 and improve the stability, the external constant current IC4 may be fixed on a heat dissipation aluminum plate and then assembled in the plastic housing 5. The number of the external current-limiting ICs is not limited to one, a plurality of external constant-current ICs connected in series can be arranged according to the heating condition of the lamp strip, and the plurality of external constant-current ICs are arranged in the plastic shell 5, but generally, one external constant-current IC is enough; or when a better heat dissipation effect is needed, a heat dissipation device such as a fan or the like can be added on the plastic shell to help the external constant-current IC dissipate heat.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a high-pressure LED lamp area that can freely tailor, includes the flexible circuit board, be equipped with a plurality of luminescence unit along length direction equidistant on the flexible circuit board, its characterized in that includes: each light-emitting unit comprises a positive electrode lead, a negative electrode lead and a transition lead, wherein the positive electrode lead, the negative electrode lead and the transition lead are integrated on the flexible circuit board along the length direction, a plurality of LED working circuits are arranged on the transition lead, and each LED working circuit comprises LED lamp beads which are connected in series and/or in parallel; the head end of the transition lead is connected with the positive lead through a first conductive lead, and the tail end of the transition lead is connected with the negative lead through a second conductive lead; current flows from the head end to the tail end.

2. The freely cuttable high-voltage LED strip according to claim 1, characterized in that it is connected to a 220V DC power supply.

3. The freely cuttable high-voltage LED lamp strip according to claim 1, wherein the LED working circuit comprises a plurality of LED lamp groups connected in series, each LED lamp group comprising at least two LED lamp beads connected in parallel.

4. The freely cuttable high-voltage LED lamp strip according to claim 3, wherein the LED working circuit further comprises a current limiting resistor connected in series with the LED lamp group.

5. A cutting application structure of a high-voltage LED lamp strip capable of being cut freely, which is used when the light-emitting unit of any one of claims 1 to 4 is cut off from the cutting application structure, and is characterized by comprising an external constant-current IC, wherein the external constant-current IC is integrated with a constant-current circuit and is connected with a positive lead and a transition lead at the cut-off part of the light-emitting unit or connected with a negative lead and a transition lead at the cut-off part of the light-emitting unit; the cut light-emitting units can form a loop after being connected with a power supply.

6. The cutting application structure of the freely cut high-voltage LED strip according to claim 5, wherein the cutting point is between the two LED working circuits.

7. The cutting application structure of the freely cut high-voltage LED lamp strip according to claim 6, wherein the flexible circuit board is coated with a coating layer, the coating layer is provided with a plurality of conductive members, the conductive members are arranged at the head end and the tail end of the working circuit and are connected with the positive wire, the negative wire and the transition wire; the external constant-current IC is in fit contact with the conductive piece to realize current communication.

8. The cutting application structure of the freely cuttable high-voltage LED strip according to claim 7, wherein the conductive member is a copper foil.

9. The cutting application structure of the freely cut high-voltage LED lamp strip according to claim 8, wherein the external constant-current IC is disposed in a plastic shell, and the plastic shell is provided with a lamp strip connector for fixedly connecting the external constant-current IC and the copper foil.

10. The cutting application structure of the freely cut high-voltage LED lamp strip according to any one of the claims 5 to 9, wherein the external constant-current IC is fixed on the heat-dissipating aluminum plate.