CN211232491U

CN211232491U - COB lamp strip

Info

Publication number: CN211232491U
Application number: CN202020159538.8U
Authority: CN
Inventors: 郑瑛
Original assignee: Chongqing Huiku Technology Co ltd
Current assignee: Chongqing Huiku Technology Co ltd
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2020-08-11
Anticipated expiration: 2030-01-23

Abstract

The embodiment of the utility model provides a COB lamp strip, including flexible circuit board, a plurality of LED chip groups and packaging layer, at least one surface of flexible circuit board is provided with the circuit layer, and the circuit layer includes along the length direction of flexible circuit board set up in the first positive and negative electrode zone of the border region of flexible circuit board to and set up in the circuit zone of the border region of flexible circuit board; the positive connecting line group and the negative connecting line group are arranged close to the cutting marks among the LED chip groups, and in the same LED chip group, the positive connecting line group and the negative connecting line group respectively comprise at least two connecting lines which are connected in parallel, and the connecting lines are arranged along the width direction of the flexible circuit board. The utility model provides a COB lamp strip, its circuit district forms electric connection through anodal line group and negative pole line group and positive and negative electrode, through the parallelly connected form of many connecting wires in the circuit district moreover for can more probably remain an at least connecting wire during shearing, promoted the fault-tolerant rate of shearing.

Description

COB lamp strip

Technical Field

The utility model relates to a LED (Light Emitting Diode) technical field especially relates to a COB lamp strip.

Background

In recent years, LEDs have been playing an important role in the display field of mobile terminals due to their unique advantages of low price, low power consumption, high brightness, long lifetime, etc., and there is a considerable development space for a long period of time in the future. An important application field of LEDs is the LED light bar, where the chip is packaged on a flexible circuit board, and the light bar can be connected in sequence along its length to extend. The LED lamp strip has the great characteristic that the LED lamp strip can be cut along with the requirements of users, and the LED lamp strip is cut according to the electrically connected minimum unit, so that a shorter lamp strip is obtained, or the LED lamp strip is connected with other lamp strips and lengthened after being cut. In the prior art, the trimming lines of the LED light bars are arranged in a manner that the trimming lines are arranged between adjacent LED chips connected in parallel, but the distance between the LED chips is small, so that the fault-tolerant space of the trimming lines is small, and once the lines which may damage one group of LED chips are mistakenly trimmed, the lines cannot emit light.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a pair of COB lamp strip, the main technical problem who solves is: the LED lamp strip shearing fault-tolerant rate in the related art is low, and the LED lamp strip is easy to damage.

In order to solve the technical problem, an embodiment of the present invention provides a COB lamp bar, which includes a flexible circuit board, a plurality of LED chip sets, and an encapsulation layer, wherein at least one surface of the flexible circuit board is provided with a circuit layer, and the circuit layer includes a first positive electrode region and a second positive electrode region which are arranged in an edge region of the flexible circuit board along a length direction of the flexible circuit board, and a circuit region which is arranged in the edge region of the flexible circuit board; the circuit relation among the LED chip groups is parallel connection, the LED chip groups comprise the same number of LED chips, and the LED chips are fixedly arranged on the flexible circuit board and are electrically connected in the circuit area according to a specified circuit connection mode; the packaging layer is arranged on the surface of the flexible circuit board, wraps the LED chip and extends along the length direction of the flexible circuit board; the line area of the LED chip group is electrically connected with the first positive electrode area and the first negative electrode area respectively through the positive connecting line group and the negative connecting line group, the positive connecting line group and the negative connecting line group are close to the shearing mark between the LED chip groups, the positive connecting line group and the negative connecting line group respectively comprise at least two connecting lines which are connected in parallel in the LED chip group, and the connecting lines are arranged along the width direction of the flexible circuit board.

Optionally, the connecting wires are respectively connected to the LED chips connected in parallel.

Optionally, the LED chip set includes at least one LED parallel group, the LED chips in the LED parallel group are connected in parallel, and the LED parallel groups are connected in series; the connecting lines are connected with the LED chips in the LED parallel group close to the cutting mark, and the number of the connecting lines is the same as that of the LED chips in the parallel group.

Optionally, the circuit layer, the LED chip set and the encapsulation layer are only disposed on one side of the flexible circuit board, the other side of the flexible circuit board is provided with a second positive and negative electrode region, and the first positive and negative electrode region is electrically connected to the second positive and negative electrode region.

Optionally, the circuit layer, the LED chip sets and the encapsulation layer are disposed on two opposite surfaces of the flexible circuit board, and the positions of the cutting marks between the LED chip sets disposed on the two surfaces are all correspondingly disposed.

Optionally, the LED chip sets disposed on the two surfaces are electrically isolated from each other.

Optionally, lines of the connecting lines are thicker than lines connected between the LED chips.

Optionally, the connecting lines are parallel to each other.

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

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

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

The utility model has the advantages that:

according to the utility model discloses a COB lamp strip that provides, including flexible circuit board, a plurality of LED chip groups and packaging layer, at least one surface of flexible circuit board is provided with the circuit layer, and the circuit layer includes along the length direction of flexible circuit board set up in the first positive and negative electrode zone of the marginal zone of flexible circuit board to and set up in the regional circuit zone in the edge of flexible circuit board; the circuit relation among the LED chip groups is parallel connection, the LED chip groups comprise the same number of LED chips, and the LED chips are fixedly arranged on the flexible circuit board and are electrically connected in a circuit area according to a specified circuit connection mode; the packaging layer is arranged on the surface of the flexible circuit board, wraps the LED chip and extends along the length direction of the flexible circuit board; the circuit area of the LED chip group is electrically connected with the first positive electrode area and the first negative electrode area respectively through the positive connecting line group and the negative connecting line group, the positive connecting line group and the negative connecting line group are arranged close to the cutting mark between the LED chip groups, in the same LED chip group, the positive connecting line group and the negative connecting line group respectively comprise at least two connecting lines which are connected in parallel, and the connecting lines are arranged along the width direction of the flexible circuit board. The utility model provides a COB lamp strip, its circuit district forms electric connection through anodal line group and negative pole line group and positive and negative electrode, through the parallelly connected form of many connecting wires in the circuit district moreover for can more probably remain an at least connecting wire during shearing, promote the fault-tolerant rate of shearing, reduce the spoilage.

Drawings

Fig. 1 is a schematic structural view of a COB light bar with a packaging layer removed according to an embodiment of the present invention;

fig. 2 is the embodiment of the utility model provides a COB lamp strip structure side view.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are described in further detail below with reference to the accompanying drawings by way of specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The first embodiment is as follows:

for the problems of low shearing fault tolerance and easy damage of the LED light bar in the prior art, the present embodiment provides a COB light bar, please refer to fig. 1 and fig. 2, where the COB light bar includes a flexible circuit board 1, a plurality of LED chip sets 2, and a packaging layer 3, at least one surface of the flexible circuit board 1 is provided with a circuit layer, and the circuit layer includes a first positive and negative electrode region 12 disposed in an edge region of the flexible circuit board 1 along a length direction of the flexible circuit board 1, and a circuit region 11 disposed in an edge inner region of the flexible circuit board 1; the line relationship among the LED chip groups 2 is parallel connection, the LED chip groups 2 comprise the same number of LED chips 211, and the LED chips 211 are fixedly arranged on the flexible circuit board 1 and are electrically connected in the line area 11 according to a specified line connection mode; the packaging layer 3 is arranged on the surface of the flexible circuit board 1, coats the LED chip 211 and extends along the length direction of the flexible circuit board 1; the circuit area 11 of the LED chip set 2 is electrically connected with the first positive electrode area 12 and the first negative electrode area 12 through the positive connecting line group 4 and the negative connecting line group 5 respectively, the positive connecting line group 4 and the negative connecting line group 5 are arranged close to the shearing mark 6 between the LED chip sets 2, in the same LED chip set 2, the positive connecting line group 4 and the negative connecting line group 5 respectively comprise at least two connecting lines which are connected in parallel, and the connecting lines are arranged along the width direction of the flexible circuit board 1.

In this embodiment, the COB lamp strip includes a flexible circuit board 1, a plurality of LED chip sets 2, and a packaging layer 3; the flexible circuit board 1 is used for bearing the LED chip 211 and the packaging layer 3, circuit wiring is arranged on the flexible circuit board 1, and the LED chip 211 can be electrically connected with the circuit wiring on the flexible circuit board 1, so that light can be emitted when a power supply is connected. The packaging layer 3 is disposed on the flexible circuit board 1, and encapsulates the LED chip 211 therein, and light emitted by the LED chip 211 is mixed and excited by the packaging layer 3 and then emitted outward.

In the light bar in this embodiment, the emitted light is linearly uniform, because the distance between the LED chips 211 is small, and the encapsulation layer 3 is continuous for each LED chip 211, as long as the input power is sufficient, the display effect of the light bar will be a continuous line light source.

The LED chip 211 is electrically connected to the flexible circuit board 1, wherein the flexible circuit board 1 specifically includes a circuit layer, which is a portion for routing disposed on the flexible circuit board 1, and includes two major portions, namely a first positive and negative electrode region 12 disposed in an edge region of the flexible circuit board 1 along a length direction of the flexible circuit board 1 and a circuit region 11 disposed in an edge region of the flexible circuit board 1; the circuit area 11 is provided with a component, generally a pad, fixedly connected and electrically connected to the LED chips 211, and a trace connecting each LED chip 211 with the first positive and negative electrode areas 12, where the trace determines a specific electrical connection mode of each LED chip 211, including an electrical connection mode between the LED chips 211 and a setting mode of a light emitting circuit of the LED chip 211. The first positive and negative electrode regions 12 are disposed at an edge region of the flexible circuit board 1 and extend along a length direction of the flexible circuit board 1, the LED chip 211 is connected to the first positive and negative electrode regions 12 through the circuit region 11, and the first positive and negative electrode regions 12 are connected to a power supply.

The LED chip 211 is divided into a plurality of LED chip groups 2 according to independent cutting units, the LED chip groups 2 are connected in parallel, and a cutting mark 6 may be disposed between adjacent LED chip groups 2 for cutting. The LED chips 211 in each LED chip group 2 have the same number and the same circuit structure, so that the input power can be equally distributed to all the LED chips 211, and the lamp strip can uniformly emit light.

The LED chips 211 in the LED chip set 2 are electrically connected to the first positive and negative electrode regions 12 through the positive electrode connecting set 4 and the negative electrode connecting set 5, respectively. For an LED chip set 2, only one positive electrode connection group 4 and one negative electrode connection group 5 are needed to realize the electrical connection of the whole chip set, wherein the positive electrode connection group 4 and the negative electrode connection group 5 are respectively connected to the first positive electrode region and the first negative electrode region. And the arrangement mode of the cutting mark 6 is between the adjacent LED chip groups 2, and the purpose of the cutting mark 6 is not to affect the chips in the LED chip groups 2 after cutting, then the anode connecting line group 4 and the cathode connecting line group 5 of the LED chip groups 2 should be arranged at the positions close to the cutting mark 6 in the LED chip groups 2.

In order to improve the shearing fault tolerance, in the present embodiment, each of the positive electrode connecting line group 4 and the negative electrode connecting line group 5 includes at least two connecting lines connected in parallel, and the connecting lines are arranged along the width direction of the flexible circuit board 1. The advantage of this is that, when cutting along the shear line, even if the deviation appears in the cutting, only the connecting line closer to the shear line is destroyed, and other connecting lines are reserved and can work normally.

In some embodiments, the connecting wires each tap into a parallel LED chip 211. The parallel connection lines may each be connected to a corresponding LED chip 211.

In some embodiments, the LED chip set 2 includes at least one LED parallel group 21, the LED chips 211 in the LED parallel group 21 are connected in parallel, and the LED parallel groups 21 are connected in series; the connection lines are connected to the LED chips 211 in the LED parallel group 21 near the cutout mark 6, and the number of the connection lines is the same as the number of the LED chips 211 connected in parallel in the parallel group 21. The LED parallel group 21 comprises a plurality of LED chips 211 which are connected in parallel, and the LED chips 211 in the parallel group 21 are connected in parallel, and the parallel groups 21 are connected in series, so that the reliability of the circuit can be improved, and even if a chip in the LED parallel group 21 is broken, other LED chips 211 in the LED parallel group 21 cannot be influenced, and the LED chips 211 in other parallel groups 21 cannot be influenced.

The LED parallel groups 21 in the LED chip group 2 are sequentially connected in series, and the parallel groups 21 at two ends of the LED chip group 2, that is, the LED chips 211 in the LED parallel groups 21 close to the cutting mark 6 are connected to the connecting line, so as to electrically connect the entire LED chip group 2 to the first positive and negative electrode regions 12. For the stability of the circuit connection, the number of the connection lines is the same as the number of the LED chips 211 connected in parallel in the parallel group 21, so that each LED chip 211 in the parallel group 21 can be independently connected to one connection line.

In some embodiments, the circuit layer, the LED chip set 2 and the encapsulation layer 3 are disposed on only one side of the flexible circuit board 1, the other side of the flexible circuit board 1 is disposed with a second positive and negative electrode region, and the first positive and negative electrode region 12 and the second positive and negative electrode region are electrically connected. The COB chip can emit light only on one surface, namely, the circuit layer, the LED chip group 2 and the packaging layer 3 are arranged on one surface of the flexible circuit board 1, and the other surface of the COB chip is used as a supporting surface, so that the COB chip can play roles in electrical connection, heat dissipation and the like; if the function of electrical connection is to be performed, a second positive and negative electrode region is arranged on the other side, and the first positive and negative electrode region 12 is electrically connected with the second positive and negative electrode region, so that the same power supply access to the first positive and negative electrode region 12 can be realized by accessing the power supply to the second positive and negative electrode region.

In some embodiments, the circuit layer, the LED chip set 2 and the packaging layer 3 are disposed on two opposite surfaces of the flexible circuit board 1, and the positions of the cutting marks 6 between the LED chip sets 2 disposed on the two surfaces are correspondingly disposed. The COB chip can set up to two-sided luminous, and that is to say that circuit layer, LED chip group 2 and encapsulated layer 3 all have the setting at the both sides of flexible circuit board 1, and for the convenience of cuting this moment, the position of the corresponding cutting mark 6 in two surfaces should be unanimous.

In some embodiments, the LED chip sets 2 disposed on the two surfaces may be electrically isolated or not isolated, and share a circuit.

In some embodiments, the lines of connecting lines are thicker than the lines of connecting between the LED chips 211. The connecting wire is as the inlet wire between first positive and negative electrode district 12 and the circuit district 11, and its circuit is thicker, can bear bigger electric current more to promote the stability of lamp strip operation.

In some embodiments, the connecting lines are parallel. The connecting lines extend along the width direction of the flexible circuit board 1 on one hand, and are parallel to each other on the other hand, so that the cutting directions corresponding to the cutting marks 6 are consistent, and the fault tolerance rate of cutting can be improved.

In some embodiments, the LED chips 211 are LED chips 211 of the same parameters; or, the LED chips 211 are two LED chips 211 with different parameters, including a first parameter LED chip 211 and a second parameter LED chip 211;

when the LED chips 211 are the same parameter LED chips 211, the encapsulation layer 3 includes: in each column of the LED chips 211, a first encapsulation layer 3 is encapsulated one by one above every other LED chip 211, and a second encapsulation layer 3 is integrally encapsulated on the first encapsulation layer 3 and the remaining LED chips 211. The same COB lamp strip can emit light with different color temperatures, and the light with different color temperatures can be realized through the difference of the LED chips 211 or the difference of the packaging layers 3. Specifically, the LED chips 211 with the same parameters are the same LED chips 211, and different encapsulation layers 3 are covered outside the LED chips 211, specifically, every other LED chip 211 covers the first encapsulation layer 3, and then all the LED chips 211, including the LED chips 211 already covered with the first encapsulation layer 3, are covered with the second encapsulation layer 3, so that only the second encapsulation layer 3 is covered, and the encapsulation layers 3 of the two LED chips 211 simultaneously covering the first encapsulation layer 3 and the second encapsulation layer 3 are covered, so that two different display effects can be generated.

In some embodiments, first parameter LED chips 211 and second parameter LED chips 211 are adjacently arranged in each column of LED chips 211. The adjacent arrangement can enable the COB lamp bars to emit light uniformly when only the LED chips 211 with a single parameter are lighted.

The embodiment provides a COB lamp strip, which comprises a flexible circuit board 1, a plurality of LED chip sets 2 and a packaging layer 3, wherein at least one surface of the flexible circuit board 1 is provided with a circuit layer, and the circuit layer comprises a first positive electrode area 12 and a first negative electrode area 12 which are arranged in the edge area of the flexible circuit board 1 along the length direction of the flexible circuit board 1, and a circuit area 11 which is arranged in the edge area of the flexible circuit board 1; the line relationship among the LED chip groups 2 is parallel connection, the LED chip groups 2 comprise the same number of LED chips 211, and the LED chips 211 are fixedly arranged on the flexible circuit board 1 and are electrically connected in the line area 11 according to a specified line connection mode; the packaging layer 3 is arranged on the surface of the flexible circuit board 1, coats the LED chip 211 and extends along the length direction of the flexible circuit board 1; the circuit area 11 of the LED chip set 2 is electrically connected with the first positive electrode area 12 and the first negative electrode area 12 through the positive connecting line group 4 and the negative connecting line group 5 respectively, the positive connecting line group 4 and the negative connecting line group 5 are arranged close to the shearing mark 6 between the LED chip sets 2, in the same LED chip set 2, the positive connecting line group 4 and the negative connecting line group 5 respectively comprise at least two connecting lines which are connected in parallel, and the connecting lines are arranged along the width direction of the flexible circuit board 1. The utility model provides a COB lamp strip, its circuit district 11 forms electric connection through anodal line group 4 and negative pole line group 5 and positive and negative electrode, through the parallelly connected form of many connecting wires in circuit district 11 moreover for can more probably remain an at least connecting wire during shearing, promote the fault-tolerant rate of shearing, reduce the spoilage.

The COB lamp strip in this embodiment can wide application in various illumination fields, like wall lamp, cabinet lamp, advertising light boxes, or make other lamps and lanterns, and this embodiment does not restrict it.

The foregoing is a more detailed description of embodiments of the present invention, and the specific embodiments are not to be considered in a limiting sense. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A COB light bar is characterized by comprising a flexible circuit board, a plurality of LED chip groups and a packaging layer, wherein at least one surface of the flexible circuit board is provided with a circuit layer, and the circuit layer comprises a first positive electrode area and a first negative electrode area which are arranged in the edge area of the flexible circuit board along the length direction of the flexible circuit board and a circuit area which is arranged in the edge area of the flexible circuit board; the circuit relation among the LED chip groups is parallel connection, the LED chip groups comprise the same number of LED chips, and the LED chips are fixedly arranged on the flexible circuit board and are electrically connected in the circuit area according to a specified circuit connection mode; the packaging layer is arranged on the surface of the flexible circuit board, wraps the LED chip and extends along the length direction of the flexible circuit board; the line area of the LED chip group is electrically connected with the first positive electrode area and the first negative electrode area respectively through the positive connecting line group and the negative connecting line group, the positive connecting line group and the negative connecting line group are close to the shearing mark between the LED chip groups, the positive connecting line group and the negative connecting line group respectively comprise at least two connecting lines which are connected in parallel in the LED chip group, and the connecting lines are arranged along the width direction of the flexible circuit board.

2. The COB light bar of claim 1, wherein the connecting wires each connect into parallel LED chips.

3. The COB light bar of claim 2, wherein the LED chip set comprises at least one parallel LED group, the LED chips in the parallel LED group are connected in parallel, and the parallel LED groups are connected in series; the connecting lines are connected with the LED chips in the LED parallel group close to the cutting mark, and the number of the connecting lines is the same as that of the LED chips in the parallel group.

4. The COB light bar of claim 1, wherein the circuit layer, the LED chip set and the encapsulation layer are only disposed on one side of the flexible circuit board, and a second positive and negative electrode region is disposed on the other side of the flexible circuit board, and the first positive and negative electrode region and the second positive and negative electrode region are electrically connected.

5. The COB light bar of any one of claims 1-3, wherein the circuit layer, the LED chip groups and the packaging layer are disposed on two opposite surfaces of the flexible circuit board, and the positions of the cut marks between the LED chip groups disposed on the two surfaces are correspondingly disposed.

6. The COB light bar of claim 5, wherein the LED chip sets disposed on the two surfaces are electrically isolated from each other.

7. The COB light bar of any one of claims 1-3, wherein the lines of the connecting lines are thicker than the lines of the connecting lines between the LED chips.

8. The COB light bar of any one of claims 1-3, wherein the connecting lines are parallel.

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

10. The COB light bar of claim 9, wherein the first parametric LED chip and the second parametric LED chip are adjacently disposed in each column of the LED chips.