CN212064428U - Lamp strip - Google Patents

Abstract

The embodiment of the utility model provides a lamp strip, which comprises at least two parallel circuit units, wherein each circuit unit comprises at least two series circuit subunits, at least one resistor is connected between at least two adjacent circuit subunits in series, and the circuit subunits comprise at least two parallel LED flip chips; in one circuit unit, two circuit subunits which are respectively connected with a power input public area and a power output public area through two lead wires are end circuit subunits; the LED flip chip positioned at the end part of the circuit unit in the end circuit subunit is an end LED flip chip; the two lead wires are positioned between the positions of the two end LED flip chips in the length direction of the flexible circuit board. Through setting up the position setting with two lead wire between the sub-circuit unit at both ends for when cuting, even there is slight deviation also can not cut the lead wire, thereby avoided because the shearing deviation cuts the lead wire and leads to corresponding the whole condemned problem of unit on the lamp strip.

Description

Lamp strip

Technical Field

The embodiment of the utility model provides a relate to LED light-emitting component technical field, more specifically, relate to a lamp strip.

Background

The LED industry is one of the most interesting industries in recent years, and LED products have been developed to date, which have the advantages of energy saving, power saving, high efficiency, fast reaction time, long life cycle, no mercury, environmental protection, and the like, and have been used for lighting purposes. In the current LED light bar, the application of the COB process is more and more popular, the COB process is that an LED flip chip is directly welded on a circuit board of the LED light bar, then packaging glue is covered outside the LED flip chip, and the LED flip chip is directly packaged on the light bar;

compared with the LED light bar manufactured by the COB process, the LED chip is packaged into one light bead and then the light bead is welded on the circuit board of the LED light bar, so that a lot of process flows can be saved, material loss caused in the process flows is reduced, and the manufacturing efficiency of the LED light bar is improved.

In present lamp strip, the length of lamp strip that uses in considering practical application needs to carry out nimble adjustment according to the actual place, consequently, LED lamp strip adopts unit design more, and an LED lamp strip comprises the multistage luminescence unit, all has a shear line between each section unit, can refer to figure 1 specifically, and the shear line is used for instructing the shearing position to the length of adjustment lamp strip.

With the application of the COB process in the LED light bar, the distance between the LED flip chips on the light bar becomes closer and closer, each unit in the light bar is composed of a complete circuit, and the lead-in wire and the lead-out wire of the circuit are both arranged at the two ends of the circuit, which requires that the lead-in wire and the lead-out wire must be cut along the middle position of two adjacent units during cutting, and the lead-in wire is easily cut by slight deviation, so that the unit does not work.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lamp strip, the lamp strip of solving among the prior art is cut the lead wire of line both sides easily when cuting, leads to the condemned problem of unit that the lamp strip corresponds.

In order to solve the problem, the embodiment of the utility model provides a lamp strip, which comprises a strip-shaped flexible circuit board, at least one row of LED flip chips and resistors which are directly arranged on the flexible circuit board along the length direction of the flexible circuit board, and a continuous strip-shaped packaging body, wherein the LED flip chips are at least packaged;

the lamp strip comprises at least two parallel circuit units, each circuit unit comprises at least two series circuit subunits, at least one resistor is connected between at least two adjacent circuit subunits in series, and the circuit subunits comprise at least two parallel LED flip chips; a power input common area and a power output common area are arranged in the width direction of the flexible circuit board;

in one circuit unit, two circuit subunits which are respectively connected with a power input public area and a power output public area through two lead wires are end circuit subunits; the LED flip chip positioned at the end part of the circuit unit in the end circuit subunit is an end LED flip chip; the two lead wires are positioned between the two end LED flip chips in the length direction of the flexible circuit board.

Optionally, the LED flip chips are LED flip chips with the same parameters; or the LED flip chip is an LED flip chip with two different parameters, including a first parameter LED flip chip and a second parameter LED flip chip;

when the LED flip chip is the LED flip chip with the same parameters, the packaging body comprises: in each row of the LED flip chips, a first packaging body packaged above every other LED flip chip one by one, and a second packaging body packaged on the first packaging body and the rest LED flip chips in a connected mode.

Optionally, the first parameter LED flip chip and the second parameter LED flip chip are adjacently arranged in each column of the LED flip chips.

Optionally, when the LED flip chip has two different parameters, the first parameter LED flip chip is directly and electrically connected to the first independent control circuit, and the second parameter LED flip chip is directly and electrically connected to the second independent control circuit;

when the LED flip chips are the LED flip chips with the same parameters, the LED flip chips covered with the first layer of packaging bodies are directly and electrically connected in the first independent control circuit, and the LED flip chips covered with the two layers of packaging bodies are directly and electrically connected in the second independent control circuit.

Optionally, the power input lead of the first independent control circuit and the power input lead of the second independent control circuit are shared, or the output lead of the first independent control circuit and the second independent control circuit are shared.

Optionally, when there are two columns of the LED flip chips; the two columns of LED flip chips are arranged on the same surface in parallel and symmetrically, or the two back-to-back surfaces are arranged with one column of LED flip chips in parallel and symmetrically.

Optionally, when the two columns of LED flip chips are arranged back to back, the two columns of LED flip chips are parallel and symmetrical to each other, and the arrangement positions are staggered.

Optionally, when there are two columns of the LED flip chips;

the first parameter LED flip chip and the second parameter LED flip chip respectively occupy one row, and the first independent control circuit and the second independent control circuit are respectively connected with the LED flip chips in one row;

the first packaging body is arranged on one row of LED flip chips, the second packaging body is arranged on the other row of LED flip chips, and the first independent control circuit and the second independent control circuit are respectively connected with one row of LED flip chips.

Optionally, when the LED flip chips have two rows and are symmetrically arranged on the same surface in parallel;

the packaging body is formed by a packaging body extruded by a glue extruding opening;

or the packaging body is formed by two packaging bodies extruded by two glue extruding openings.

Optionally, the resistors are arranged in two rows in the width direction of the flexible circuit board respectively, and the two sides of the LED flip chip are arranged on the same side of the flexible circuit board;

or when the LED flip chips are arranged in two rows and are symmetrically arranged on the same surface in parallel, the resistor is arranged in a gap between the two rows of the LED flip chips;

or the LED flip chips are arranged between two adjacent LED flip chips on one column of the LED flip chips.

The embodiment of the utility model provides a lamp strip, which comprises a strip-shaped flexible circuit board, at least one row of LED flip chips and resistors which are directly arranged on the flexible circuit board along the length direction of the flexible circuit board, and a continuous strip-shaped packaging body which at least packages the LED flip chips; the lamp strip comprises at least two parallel circuit units, each circuit unit comprises at least two series circuit subunits, at least one resistor is connected between at least two adjacent circuit subunits in series, and each circuit subunit comprises at least two parallel LED flip chips; a power input common area and a power output common area are arranged in the width direction of the flexible circuit board; in one circuit unit, two circuit subunits which are respectively connected with a power input public area and a power output public area through two lead wires are end circuit subunits; the LED flip chip positioned at the end part of the circuit unit in the end circuit subunit is an end LED flip chip; the two lead wires are positioned between the positions of the two end LED flip chips in the length direction of the flexible circuit board. Through setting up the position setting with two lead wire between the sub-circuit unit at both ends for when cuting, even there is slight deviation also can not cut the lead wire, thereby avoided because the shearing deviation cuts the lead wire and leads to corresponding the whole condemned problem of unit on the lamp strip.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic circuit diagram of a conventional LED light bar;

fig. 2 is a schematic diagram of a circuit structure of a light bar provided in an embodiment of the present invention;

fig. 3 is a schematic diagram of a light bar of a different type of package body packaged by a LED flip chip with the same parameters according to an embodiment of the present invention;

fig. 4 is a schematic view of a light bar of an LED flip chip with two different parameters according to an embodiment of the present invention;

fig. 5 is a light bar provided in two rows of LED flip chips, which are arranged on the same plane in parallel and symmetrically;

fig. 6 is a schematic cross-sectional view of a lamp strip that is parallel and symmetrical on two opposite surfaces and is respectively provided with a row of LED flip chips provided by the embodiment of the utility model.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments, not all embodiments, in the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The present invention will now be further explained by way of the detailed description in conjunction with the drawings.

This embodiment provides a lamp strip, this lamp strip includes: the LED flip chip lamp strip at least comprises two parallel circuit units, each circuit unit comprises at least two series circuit subunits, at least one resistor is connected between at least two adjacent circuit subunits in series, and each circuit subunit comprises at least two parallel LED flip chips; a power input common area and a power output common area are arranged in the width direction of the flexible circuit board; in one circuit unit, two circuit subunits which are respectively connected with a power input public area and a power output public area through two lead wires are end circuit subunits; the LED flip chip positioned at the end part of the circuit unit in the end circuit subunit is an end LED flip chip; the two lead wires are positioned between the positions of the two end LED flip chips in the length direction of the flexible circuit board.

Referring to fig. 2, fig. 2 is a schematic circuit structure diagram of a light bar provided in the present embodiment. The lamp strip is connected in parallel by circuit unit 3 in proper order and constitutes, and circuit unit 3 inserts power input public area 1 and power output public area 2 through two lead wire 4. Each circuit unit 3 includes two circuit subunits 301, the two circuit subunits 301 are connected in series, and a resistor 5 is connected in series, each circuit subunit 301 is formed by connecting five LED flip chips in parallel, fig. 2 only includes two circuit subunits, so the left circuit subunit and the right circuit subunit are end circuit subunits, two lead wires 4 respectively connect the circuit subunits at the two ends to the power input public area 1 and the power output public area 2, the arrangement positions of the two lead wires 4 are located in the circuit subunits at the two ends, and the LED flip chips at the middle position correspond to the positions. In fig. 2, two lead wires are arranged in the middle of the end unit, so that even if the outermost LED flip chip of the end circuit subunit is sheared due to deviation, the shearing of the outermost LED flip chip on the line can be influenced, other LED flip chips in the circuit unit are not influenced, and the whole single-circuit unit cannot be scrapped.

It should be noted that the schematic diagram of fig. 2 is a schematic diagram of an internal circuit structure seen when white paint is omitted, in daily application, a layer of white paint is covered on the surface of the flexible circuit board of the light bar, and the white paint covers the whole circuit except for the circuit outside the pin area of the LED flip chip, so that in daily application, a specific circuit structure in the light bar cannot be seen. And after direct electrical connection LED flip chip on the lamp strip, can encapsulate a continuous packaging body 6 on flip chip, all LED flip chips all are encapsulated in packaging body 6, consequently, the length of packaging body is equivalent to the length of lamp strip, and the width needs to be greater than the width of LED flip chip.

In the light bar provided by this embodiment, the LED flip chips are LED flip chips with the same parameters; or the LED flip chip is an LED flip chip with two different parameters, including a first parameter LED flip chip and a second parameter LED flip chip; when the LED flip chip is the LED flip chip with the same parameters, the packaging body comprises: in each column of the LED flip chips, a first packaging body packaged above every other LED flip chip one by one, and a second packaging body integrally packaged on the first packaging body and the rest LED flip chips.

The first parameter LED flip chip and the second parameter LED flip chip are adjacently arranged in each column of the LED flip chips.

Referring to fig. 3 and 4, fig. 3 is a schematic diagram of different types of packages packaged by the flip-chip LED with the same light bar parameter according to the present embodiment, and fig. 4 is a schematic diagram of the flip-chip LED with two different light bar parameters according to the present embodiment. In fig. 3, the parameters of the LED flip chips are the same, the LED flip chips are represented by squares, in a column of flip chips, a first package 601 with a circular area is covered above every other LED flip chip, and a second package 602 is covered on the first package and the rest of the flip chips. In fig. 4, two LED flip chips with different parameters are included, wherein the first parameter LED flip chip is represented by a square, the second parameter LED flip chip is represented by a circle, and the first parameter LED flip chip and the second parameter LED flip chip are adjacently arranged in fig. 4. When the LED flip chips are LED flip chips with the same parameters, different color temperatures can be realized by covering different packaging bodies on the LED flip chips, so that the purpose that the LED flip chips with the same parameters on one row of LED flip chips with the same parameters can emit two different color temperatures by covering the first packaging body and the second packaging body on the LED flip chips with the same parameters can be realized; and the LED flip chip with different parameters can realize different color temperatures and different light-emitting colors in the same way. It should be noted that fig. 3 and 4 are only for illustrating the arrangement sequence of the LED flip chips, and the corresponding resistors are not shown, but in practical applications, the resistors are an essential component in the circuit of the light bar, so that the light bar in fig. 3 and 4 still includes the resistors.

In the light bar provided by this embodiment, when the LED flip chip is an LED flip chip with two different parameters, the first parameter LED flip chip is directly electrically connected to the first independent control circuit, and the second parameter LED flip chip is directly electrically connected to the second independent control circuit; when the LED flip chips are the LED flip chips with the same parameters, the LED flip chips covered by the first layer of packaging bodies are directly and electrically connected in the first independent control circuit, and the LED flip chips covered by the second layer of packaging bodies are directly and electrically connected in the second independent control circuit.

In this embodiment, it is considered that the light bar can cover different packages on the LED flip chip with the same parameters, or realize different color temperatures or different light emitting colors by setting the LED flip chips with different parameters, and therefore, the LED flip chips with different packages are covered, and the LED flip chips with two different parameters respectively adopt different independent control circuits to realize the control of different color temperatures and different light emitting colors. Taking the light bar in fig. 3 as an example, when the first package bodies are arranged at intervals of one LED flip chip, the chips packaged with the first package bodies in one circuit unit section can be electrically connected in the first independent control circuit as a group, and the other LED flip chips are electrically connected in the second independent control circuit, wherein the wires of the first independent control circuit are mainly arranged above the light bar near one side of the power input common area, and the wires of the second independent control circuit are mainly arranged below the light bar near one side of the power output common area, so that the wires of the first independent control circuit and the second independent control circuit are separated from each other, thereby avoiding the two independent control circuits from crossing and increasing the process and processing difficulty; similarly, the LED flip chip with two different parameters in fig. 4 can also adopt the routing manner of the first independent control circuit and the second independent control circuit in fig. 3.

In the light bar provided by this embodiment, the power input leads of the first independent control circuit and the second independent control circuit are shared, or the output leads are shared. The first independent control circuit and the second independent control circuit share the input lead or the output lead, so that the occupied area of the lead can be reduced, and more space is provided for the arrangement and heat dissipation of the LED flip chip.

In the light bar provided by the embodiment, when the LED flip chip has two rows; the two columns of LED flip chips are arranged on the same surface in parallel and symmetrically, or the two back-to-back surfaces are arranged with one column of LED flip chips in parallel and symmetrically.

Fig. 5 and 6 can be referred to, in which fig. 5 is a lamp strip with two parallel and symmetrical rows of LED flip chips disposed on the same surface, and fig. 6 is a schematic cross-sectional view of a lamp strip with two opposite surfaces disposed with two parallel and symmetrical rows of LED flip chips. When being provided with two rows of LED flip chips on the lamp strip, two rows of LED flip chips parallel arrangement, two rows of LED flip chips must be the setting of symmetry simultaneously, can guarantee two rows of LED flip chips's shearing position when the symmetry sets up in the form position, let two rows of LED flip chips' the better even of giving out light, simultaneously. When two rows of LED flip chip back to back set up the both sides of treating flexible circuit board, the lamp strip that this implementation provided is with two parallel and symmetrical settings of LED flip chip back to back, simultaneously in order to guarantee better radiating effect, staggers two rows of LE flip chip amount setting positions back to back each other as shown in fig. 6.

In the light bar provided by this embodiment, when there are two rows of LED flip chips; the first parameter LED flip chip and the second parameter LED flip chip respectively occupy one row, and the first independent control circuit and the second independent control circuit are respectively connected with the LED flip chips in one row; the first packaging body is arranged on one row of LED flip chips, the second packaging body is arranged on the other row of LED flip chips, and the first independent control circuit and the second independent control circuit are respectively connected with one row of LED flip chips.

Specific circuit structure can refer to fig. 5, when LED flip chip has two, with first parameter LED flip chip and second parameter LED flip chip individual setting one, perhaps set up first encapsulation body on a LED flip chip, the second encapsulation body sets up on another LED flip chip, simultaneously first independent control circuit and second independent control circuit respectively connect a LED flip chip, compare the condition that sets up simultaneously in a row, can reduce the complexity of circuit, reduce the degree of difficulty of production, simultaneously because each independent control circuit respectively sets up in a LED flip chip, thereby walk the line width wideer and reduced the probability that the lamp strip broke down.

In the light bar provided by the embodiment, when the LED flip chips have two rows and are symmetrically arranged on the same plane in parallel; the packaging body is formed by a packaging body extruded by a glue extruding opening; or the packaging body is formed by two packaging bodies extruded by two glue extruding openings.

The packaging body is formed by extruding the packaging body through the glue extruding port, so that the light mixing of two lines of LED flip chips is better and uniform, the existing glue dispensing process is not required to be changed, and the generation is convenient; the packaging body is formed by two packaging body that crowded mouth of gluing extrudes, when two intervals between the LED flip chip are wider, can guarantee that two LED flip chip homoenergetic are listed as and can be covered by the packaging body, and two crowded gluey mouthful of gluey volume of extruding are better many simultaneously, can guarantee that the thickness of packaging body reaches the requirement.

In the light bar provided by this embodiment, the resistors are arranged in two rows in the width direction of the flexible circuit board respectively, and are arranged on two sides of the LED flip chip; or when the LED flip chips are arranged in two rows and are symmetrically arranged on the same plane in parallel, the resistor is arranged in the gap between the two rows of the LED flip chips; or, between two adjacent LED flip chips in a column of LED flip chips.

It should be noted that the resistor is an indispensable device in the light bar, and in practical applications, the setting manner of the resistor on the light bar can be flexibly set according to the specific circuit design,

as can be seen from the above embodiments, the embodiments of the present invention have many combinations, and the above description is only the preferred embodiments of the present invention, and the description thereof is specific and detailed, but cannot be understood as the limitation of the scope of the embodiments of the present invention. It should be noted that, for those skilled in the art, without departing from the concept of the embodiments of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the embodiments of the present invention.

Claims (10)

1. The light bar is characterized by comprising a strip-shaped flexible circuit board, at least one row of LED flip chips and resistors, and a continuous strip-shaped packaging body, wherein the LED flip chips and the resistors are directly arranged on the flexible circuit board along the length direction of the flexible circuit board;

the lamp strip comprises at least two parallel circuit units, each circuit unit comprises at least two series circuit subunits, at least one resistor is connected between at least two adjacent circuit subunits in series, and the circuit subunits comprise at least two parallel LED flip chips; a power input common area and a power output common area are arranged in the width direction of the flexible circuit board;

in one circuit unit, two circuit subunits which are respectively connected with a power input public area and a power output public area through two lead wires are end circuit subunits; the LED flip chip positioned at the end part of the circuit unit in the end circuit subunit is an end LED flip chip; the two lead wires are positioned between the two end LED flip chips in the length direction of the flexible circuit board.

2. The light bar of claim 1, wherein the LED flip chips are of the same parameters; or the LED flip chip is an LED flip chip with two different parameters, including a first parameter LED flip chip and a second parameter LED flip chip;

when the LED flip chip is the LED flip chip with the same parameters, the packaging body comprises: in each row of the LED flip chips, a first packaging body packaged above every other LED flip chip one by one, and a second packaging body packaged on the first packaging body and the rest LED flip chips in a connected mode.

3. The light bar of claim 2, wherein the first parameter LED flip chips and the second parameter LED flip chips are arranged adjacent to each other in each column of the LED flip chips.

4. The light bar of claim 2, wherein when the LED flip chip is two different parameters, the first parameter LED flip chip is directly electrically connected in a first independent control circuit and the second parameter LED flip chip is directly electrically connected in a second independent control circuit;

when the LED flip chips are the LED flip chips with the same parameters, the LED flip chips covered with the first layer of packaging bodies are directly and electrically connected in the first independent control circuit, and the LED flip chips covered with the two layers of packaging bodies are directly and electrically connected in the second independent control circuit.

5. The light bar of claim 4, wherein the first independent control circuit and the second independent control circuit share power input leads or output leads.

6. The light bar of any one of claims 1-5, wherein when there are two columns of LED flip chips; the two columns of LED flip chips are arranged on the same surface in parallel and symmetrically, or the two back-to-back surfaces are arranged with one column of LED flip chips in parallel and symmetrically.

7. The light bar of claim 6, wherein the two rows of LED flip-chip are parallel and symmetrical to each other and are positioned in a staggered manner when the two rows of LED flip-chip are positioned back-to-back.

8. The light bar of claim 6, wherein when there are two columns of the LED flip chips;

the first parameter LED flip chip and the second parameter LED flip chip respectively occupy one row, and the first independent control circuit and the second independent control circuit are respectively connected with the LED flip chips in one row;

the first packaging body is arranged on one row of LED flip chips, the second packaging body is arranged on the other row of LED flip chips, and the first independent control circuit and the second independent control circuit are respectively connected with one row of LED flip chips.

9. The light bar of claim 6, wherein when the LED flip chips are in two rows and are symmetrically arranged in parallel on the same surface;

the packaging body is formed by a packaging body extruded by a glue extruding opening;

or the packaging body is formed by two packaging bodies extruded by two glue extruding openings.

10. The light bar of claim 6, wherein the resistors are arranged in two rows on two sides of the LED flip chip in the width direction of the flexible circuit board; (ii) a

Or when the LED flip chips are arranged in two rows and are symmetrically arranged on the same surface in parallel, the resistor is arranged in a gap between the two rows of the LED flip chips;

or the LED flip chips are arranged between two adjacent LED flip chips on one column of the LED flip chips.

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