Circuit board and lamp strip

Abstract

The embodiment of the utility model provides a circuit board and a lamp strip, and the circuit board comprises a first insulating layer, a first conductor layer, a second insulating layer, a second conductor layer and a third insulating layer which are stacked. The first conductor layer is provided with a first main power line and a second main power line which extend along the length direction of the circuit board; the second conductor layer is provided with a plurality of branch power line groups which are sequentially distributed in the length direction of the circuit board, each branch power line group comprises a plurality of branch power lines, and the branch power lines at the two ends of each branch power line group are a first branch power line and a second branch power line respectively; the circuit board is provided with a plurality of groups of filling holes penetrating from the top surface of the circuit board to the first conductor layer, the filling holes comprise first sub-holes and second sub-holes, the first sub-holes penetrate through the first branch power line and penetrate through the first main power line, and the second sub-holes penetrate through the second branch power line and penetrate through the second main power line.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lighting devices, in particular to a circuit board and a lamp strip. BACKGROUND

[0002] The lamp strip generally comprises a circuit board and a light emitting device. The circuit board is provided with a first main power line, a second main power line and a branch power line group which are distributed in the same layer. The branch power line group is clamped between the first main power line and the second main power line along the width direction of the circuit board. Since the first main power line, the branch power line group and the second main power line are distributed along the width direction of the circuit board, the width size of the circuit board is difficult to reduce. Since the width size of the circuit board is difficult to reduce, the width size of the lamp strip provided with the circuit board is also difficult to reduce. CONTENT OF THE UTILITY MODEL

[0003] The present application provides a circuit board and a lamp strip to solve the problem of how to improve the width size of the circuit board which is difficult to reduce.

[0004] In order to solve the above technical problem, the present application is implemented as follows:

[0005] In a first aspect, the present application provides a circuit board.

[0006] The circuit board provided by the present application comprises: a first insulating layer, a first conductor layer, a second insulating layer, a second conductor layer and a third insulating layer which are arranged in layers; the first conductor layer is provided with a first main power line and a second main power line which extend along the length direction of the circuit board; the second conductor layer is provided with a plurality of branch power line groups which are distributed in sequence along the length direction of the circuit board, each branch power line group comprises a plurality of branch power lines, and the branch power lines at both ends of the branch power line group are respectively a first branch power line and a second branch power line; the circuit board is provided with a plurality of groups of filler holes which penetrate from the top surface of the circuit board to the first conductor layer, each group of filler holes comprises a first sub-hole and a second sub-hole, the first sub-hole penetrates the first branch power line and penetrates to the first main power line, and the second sub-hole penetrates the second branch power line and penetrates to the second main power line.

[0007] Optionally, the circuit board is provided with a plurality of groups of power line exposure windows which penetrate from the top surface of the circuit board to the first conductor layer, each group of power line exposure windows is distributed in sequence and spaced apart along the length direction of the circuit board; each power line exposure window comprises a first sub-exposure window and a second sub-exposure window, in the thickness direction of the circuit board, the first sub-exposure window is opposite to the first main power line, and the second sub-exposure window is opposite to the second main power line.

[0008] Optionally, a surface of the first main power line located in the area surrounded by the first sub-exposed window is provided with a first tin layer, and a surface of the second main power line located in the area surrounded by the second sub-exposed window is provided with a second tin layer.

[0009] Optionally, the circuit board is a flexible circuit board, the thickness of the first tin layer is less than or equal to 0.1 mm, and the thickness of the second tin layer is less than or equal to 0.1 mm.

[0010] Optionally, in the length direction of the circuit board, each power line exposed window is located in the boundary area of adjacent branch power line groups.

[0011] In a second aspect, the embodiments of the present application provide a lamp strip.

[0012] The lamp strip provided by the embodiments of the present application comprises: a light emitting device and any one of the circuit boards provided by the embodiments of the present application; each light emitting device is sequentially arranged on the circuit board along the length direction of the circuit board, and the light emitting device is electrically connected to the branch power line group in a one-to-one correspondence, so that the branch power line group and the light emitting device corresponding thereto form a light emitting circuit.

[0013] Optionally, the first sub-hole is filled with a first conductive piece electrically connecting the first branch power line and the first main power line, and the second sub-hole is filled with a second conductive piece electrically connecting the second branch power line and the second main power line, and the orthographic projection of the light emitting device on the circuit board is distributed in a staggered manner with the filler holes.

[0014] Optionally, the first conductive piece is formed by solidification of a liquid metal filled in the first sub-hole, and the second conductive piece is formed by solidification of a liquid metal filled in the second sub-hole.

[0015] Optionally, the lamp strip further comprises a double-sided adhesive layer, one side of the double-sided adhesive layer is bonded to the bottom surface of the circuit board, the circuit board comprises a first side surface and a second side surface along the width direction of the circuit board, the double-sided adhesive layer comprises a third side surface and a fourth side surface along the width direction of the circuit board, the first side surface and the third side surface are located on the same side of the lamp strip, and the third side surface and the fourth side surface are located on the same side of the lamp strip; the first side surface is flush with the third side surface, and / or the third side surface is flush with the fourth side surface.

[0016] Optionally, the lamp strip further comprises a first dam glue and a second dam glue extending along the length direction of the circuit board, the first dam glue and the second dam glue are arranged on two sides of the light emitting device away from each other along the width direction of the circuit board, and a light transmission glue is arranged between the first dam glue and the second dam glue; the height of the first dam glue is greater than the height of the light emitting device, and the height of the second dam glue is greater than the height of the light emitting device.

[0017] The above at least one technical solution adopted by the embodiments of the present application can achieve the following beneficial effects:

[0018] In the embodiments of the present application, the width size of the circuit board can be reduced by arranging the first conductor layer for forming the first main power line and the second main power line, and the second conductor layer for forming the branch power line group, to be spaced apart in the thickness direction of the circuit board.

[0019] Additional aspects and advantages of the present application will be described in the following description and become apparent from the following description or will be learned by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related art, the drawings needed to be used in the embodiments or the related art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 A schematic diagram of a circuit board is provided for the embodiments of the present application;

[0022] Figure 2 An exploded schematic diagram of a single segment circuit board is provided for the embodiments of the present application;

[0023] Figure 3 A schematic diagram of a lamp strip is provided for the embodiments of the present application;

[0024] Figure 4 A partial schematic diagram of a lamp strip is provided for the embodiments of the present application;

[0025] Figure 5 A left view of a lamp strip is provided for the embodiments of the present application;

[0026] Figure 6 A schematic diagram of a lamp strip is provided for the embodiments of the present application, which shows the case of omitting the first dam glue, the second dam glue and the light transmission glue on the basis of the lamp strip shown in Figure 3 ​

[0027] Figure 7 A schematic diagram of a first conductor layer provided in an embodiment of this application;

[0028] Figure 8 A schematic diagram of a second conductor layer and a light-emitting device provided for an embodiment of this application;

[0029] Figure 9 A schematic diagram of a single-segment LED strip provided in an embodiment of this application;

[0030] Figure 10 This is a schematic diagram of a single-segment light strip provided in an embodiment of the present application, which shows that in Figure 9 The first dammed adhesive, the second dammed adhesive, and the light-transmitting adhesive are omitted from the light strip shown in the figure;

[0031] Figure 11 This is a schematic diagram of a single-segment light strip provided in an embodiment of the present application, which shows that in Figure 10 The first and second conductive components are omitted from the light strip shown in the figure;

[0032] Figure 12 for Figure 10 An exploded view of a single-segment light strip is shown in the image.

[0033] Figure 13 A schematic diagram of a first conductor layer, a second conductor layer, and a light-emitting device for a single-segment LED strip provided in an embodiment of this application;

[0034] Figure 14 A schematic diagram of a semi-finished LED strip before cutting, provided in an embodiment of this application;

[0035] Figure 15 This is a schematic diagram of a circuit board, a light-emitting device, and a glue-applying needle provided in an embodiment of this application.

[0036] Explanation of reference numerals in the attached figures:

[0037] 1-LED strip;

[0038] 100 - Circuit Board;

[0039] 111 - First insulating layer; 112 - Second insulating layer; 113 - Third insulating layer;

[0040] 120 - First conductor layer; 121 - First main power line; 122 - Second main power line;

[0041] 130 - Second conductor layer; 131 - Branch power line group; 1310 - Branch power line; 1311 - First branch power line; 1312 - Second branch power line;

[0042] 141 - filler hole; 1411 - first sub-hole; 1412 - second sub-hole;

[0043] 142 - power line exposure window; 1421 - first sub-exposure window; 1422 - second sub-exposure window;

[0044] 1431 - first tin layer; 1432 - second tin layer;

[0045] 1441 - first conductive member; 1442 - second conductive member;

[0046] 151 - first side surface; 152 - second side surface;

[0047] 200 - light emitting device; 210 - lamp bead; 220 - resistor;

[0048] 300 - double-sided adhesive layer; 310 - third side surface; 320 - fourth side surface;

[0049] 410 - first dam adhesive; 420 - second dam adhesive; 430 - light-transmissive adhesive;

[0050] 2 - pull adhesive needle. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below with reference to the embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0052] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be direct connection, or indirect connection through an intermediate medium, can be internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0053] In addition, although the terms used in the present application are selected from the commonly known and used terms, some terms mentioned in the specification of the present application can be selected by the applicant according to his or her judgment, and the detailed meanings of which are described in the relevant parts of the description herein.

[0054] In addition, the present application is required to be understood not only by the actual terms used, but also by the meanings implied by each term.

[0055] The technical solutions provided by the embodiments of the present application are described in detail below with reference to the drawings.

[0056] The embodiments of the present application provide a circuit board. Referring to Figures 1 to 13 The circuit board 100 provided by the embodiments of the present application comprises a first insulating layer 111, a first conductor layer 120, a second insulating layer 112, a second conductor layer 130 and a third insulating layer 113 which are stacked.

[0057] Referring to Figure 7 The first conductor layer 120 is provided with a first main power line 121 and a second main power line 122 which extend along the length direction of the circuit board 100. Referring to Figure 8 、 Figure 12 and Figure 13 The second conductor layer 130 is provided with a plurality of branch power line groups 131 which are distributed along the length direction of the circuit board 100 in sequence. The branch power line group 131 comprises a plurality of branch power lines 1310. The branch power lines 1310 at both ends of the branch power line group 131 are respectively a first branch power line 1311 and a second branch power line 1312.

[0058] In this way, when the circuit board 100 is used to carry the light emitting device 200, the light emitting device 200 can be electrically connected to the branch power line group 131 one by one, so that the branch power line group 131 and the light emitting device 200 corresponding thereto form a light emitting circuit.

[0059] Exemplarily, the material of the first conductor layer 120 and the second conductor layer 130 is copper or an alloy of copper. Further, the material of the first main power line 121, the second main power line 122 and the branch power line group 131 is also copper or an alloy of copper. In this way, the first conductor layer 120 and the second conductor layer 130 can have the advantages of good electrical conductivity and low cost. Of course, it can be understood that the first conductor layer 120 and the second conductor layer 130 can also be made of any other material with electrical conductivity, which is not listed one by one here.

[0060] Further, referring to Figure 6 、 Figures 10 to 12 The circuit board 100 is provided with a plurality of groups of filler holes 141 which penetrate through the top surface of the circuit board 100 to the first conductor layer 120. The filler hole 141 comprises a first sub-hole 1411 and a second sub-hole 1412. The first sub-hole 1411 penetrates through the first branch power line 1311 and penetrates to the first main power line 121. The second sub-hole 1412 penetrates through the second branch power line 1312 and penetrates to the second main power line 122.

[0061] In this way, the light emitting circuit can be connected with the first main power line 121 and the second main power line 122 respectively by filling the first sub-hole 1411 with the first conductive member 1441 for electrically connecting the first branch power line 1311 and the first main power line 121, and filling the second sub-hole 1412 with the second conductive member 1442 for electrically connecting the second branch power line 1312 and the second main power line 122. Further, the light emitting circuit can be supplied with power through the first main power line 121 and the second main power line 122 by connecting the first main power line 121 and the second main power line 122 with the fire wire and the zero wire of the external power line respectively, so that the light emitting device 200 can emit light.

[0062] In this way, in the embodiments of the present application, the width of the circuit board 100 can be reduced by arranging the first conductor layer 120 for forming the first main power line 121 and the second main power line 122 and the second conductor layer 130 for forming the branch power line group 131 to be spaced apart in the thickness direction of the circuit board 100.

[0063] Since the circuit board 100 can be used to carry the light emitting device 200, for the convenience of those skilled in the art to understand the scheme provided in the embodiments of the present application, in the following, the scheme provided in the embodiments of the present application will be explained in detail mainly by taking the example of the combination of the circuit board 100 carrying the light emitting device 200 into the light strip 1. It should be noted that in other embodiments, the circuit board 100 can also carry other components, which will not be described here.

[0064] Reference Figure 3 and Figure 4 In some embodiments, the circuit board 100 is provided with a plurality of power line exposure windows 142 penetrating from the top surface of the circuit board 100 to the first conductor layer 120, and each group of power line exposure windows 142 is spaced apart along the length direction of the circuit board 100.

[0065] The power line exposure window 142 includes a first sub-exposure window 1421 and a second sub-exposure window 1422. In the thickness direction of the circuit board 100, the first sub-exposure window 1421 is opposite to the first main power line 121, and the second sub-exposure window 1422 is opposite to the second main power line 122. Exemplarily, the first main power line 121 forms the fire wire of the circuit board 100, and the second main power line 122 forms the zero wire of the circuit board 100. The first main power line 121 is used to connect with the fire wire of the external power source, and the second main power line 122 is used to connect with the zero wire of the external power source.

[0066] In this way, by using the scheme provided in the embodiments of the present application, the first main power line 121 can be exposed to the outer surface of the lamp strip 1 through the first sub-exposed window 1421, and the second main power line 122 can be exposed to the outer surface of the lamp strip 1 through the second sub-exposed window 1422. Thus, the external power line can be welded to the part of the first main power line 121 exposed to the outside of the lamp strip 1 and the part of the second main power line 122 exposed to the outside of the lamp strip 1, so as to supply power to the lamp strip 1 by using the external power line.

[0067] With reference to Figure 4 , with reference to Figure 3 and Figure 4 , in some embodiments, the surface of the first main power line 121 located in the area surrounded by the first sub-exposed window 1421 is provided with a first tin layer 1431. In this way, the exposed part of the first main power line 121 can be prevented from being oxidized by using the first tin layer 1431, so that the subsequent welding process with the external power line is difficult to be welded or the welding is not firm.

[0068] Similarly, the surface of the second main power line 122 located in the area surrounded by the second sub-exposed window 1422 is provided with a second tin layer 1432. In this way, the exposed part of the second main power line 122 can be prevented from being oxidized by using the second tin layer 1432, so that the subsequent welding process with the external power line is difficult to be welded or the welding is not firm.

[0069] In some embodiments, the circuit board 100 is a flexible circuit board 100, the thickness of the first tin layer 1431 is less than or equal to 0.1 millimeter, and the thickness of the second tin layer 1432 is less than or equal to 0.1 millimeter. In this way, the problems that the first tin layer 1431 is easily separated from the first main power line 121 and the second tin layer 1432 is easily separated from the second main power line 122 during the coiling of the lamp strip 1 can be avoided due to the large thickness of the first tin layer 1431 and the second tin layer 1432.

[0070] It should be noted that in other embodiments, the circuit board 100 can also be a rigid circuit board.

[0071] With reference to Figure 6 and Figure 8 , in some embodiments, in the length direction of the circuit board 100, each power line exposed window 142 is located at the boundary area of adjacent branch power line groups 131. In this way, the lamp strip 1 provided with the circuit board 100 can be cut according to the demand from the power line exposed window 142, so that the length of the cut lamp strip meets the user's demand.

[0072] The embodiments of the present application provide a lamp strip. With reference to Figures 3 to 13The lamp strip 1 provided by the embodiment of the present application comprises the light emitting device 200 and any one of the circuit boards 100 provided by the embodiment of the present application. Exemplarily, the light emitting device 200 can comprise at least one of a light-emitting diode (LED) and a light bulb.

[0073] The light emitting device 200 is sequentially arranged along the length direction of the circuit board 100, and the light emitting device 200 is electrically connected to the branch power line group 131 in one-to-one correspondence, so that the branch power line group 131 and the light emitting device 200 corresponding thereto form a light emitting circuit. Further, the light emitting device 200 can be powered by an external power supply in a manner that the light emitting circuit is connected to the first main power line 121 and the second main power line 122 in one-to-one correspondence, and the first main power line 121 and the second main power line 122 are connected to the live wire and the neutral wire of the external power supply, so that the light emitting device 200 can emit light.

[0074] In some embodiments, the first sub-hole 1411 is filled with a first conductive member 1441 electrically connecting the first branch power line 1311 and the first main power line 121. In this way, the first conductive member 1441 can be used to electrically connect the first branch power line 1311 and the first main power line 121. The second sub-hole 1412 is filled with a second conductive member 1442 electrically connecting the second branch power line 1312 and the second main power line 122. In this way, the second conductive member 1442 can be used to electrically connect the second branch power line 1312 and the second main power line 122.

[0075] Further, the orthographic projection of the light emitting device 200 on the circuit board 100 is distributed in a staggered manner with the filler hole 141. In this way, the light emitting device 200 will not block the first sub-hole 1411 and the second sub-hole 1412. Further, whether the branch power line 1310 at both ends of the light emitting circuit is respectively conductive with the first main power line 121 and the second main power line 122 can be determined by visually detecting whether the first sub-hole 1411 is filled with the first conductive member 1441 and whether the second sub-hole 1412 is filled with the second conductive member 1442. Thus, whether the light emitting circuit is respectively conductive with the first main power line 121 and the second main power line 122 can be determined more conveniently.

[0076] Since the detection method of visual detection has a lower implementation difficulty, the scheme provided by the embodiment of the present application can more conveniently determine whether the branch power line 1310 at both ends of the light emitting circuit is respectively conductive with the first main power line 121 and the second main power line 122.

[0077] In some embodiments, the first conductive member 1441 is formed by solidification of liquid metal filled in the first sub-hole 1411, and the second conductive member 1442 is formed by solidification of liquid metal filled in the second sub-hole 1412.

[0078] Exemplarily, the first conductive member 1441 is formed by solidification of the tin liquid filled in the first sub-hole 1411, and the second conductive member 1442 is formed by solidification of the tin liquid filled in the second sub-hole 1412. Exemplarily, for example, in the case of filling 1 milliliter of tin liquid into the first sub-hole 1411, the tin liquid does not overflow from the orifice of the first sub-hole 1411, and the top surface of the solidified tin block is slightly lower than the height of the orifice of the first sub-hole 1411. Thus, whether the first branch power line 1311 and the first main power line 121 are conducted by the tin block in the first sub-hole 1411 can be more accurately determined by observing whether there is tin residue around the orifice of the first sub-hole 1411, and observing the height difference between the solidified tin block in the first sub-hole 1411 and the orifice of the first sub-hole 1411. In a similar manner, whether the second branch power line 1312 and the second main power line 122 are conducted by the tin block in the second sub-hole 1412 can be more accurately determined.

[0079] Reference Figure 8 , Figure 12 and Figure 13 In some embodiments, the light-emitting device 200 includes a plurality of lamp beads 210, and the branch power line 1310 is electrically connected to each lamp bead 210 in sequence to make the lamp beads 210 of each light-emitting circuit in series. Exemplarily, a single set of light-emitting device 200 includes 7 lamp beads 210 with a rated voltage of 24 volts. In addition, a resistor 220 is also connected in series in the light-emitting circuit. The resistor 220 is used to function as a current limiter.

[0080] In some embodiments, the light strip further includes a double-sided adhesive layer 300, one side of the double-sided adhesive layer 300 being bonded to the bottom surface of the circuit board 100. In this way, in the process of using the light strip 1, the backing paper on the back of the double-sided adhesive layer 300 can be removed, so that the light strip 1 is bonded to the position where the light strip needs to be installed.

[0081] Reference Figure 5 In some embodiments, the circuit board 100 includes a first side 151 and a second side 152 along the width direction of the circuit board 100, the double-sided adhesive layer 300 includes a third side 310 and a fourth side 320 along the width direction of the circuit board 100, the first side 151 and the third side 310 are located on the same side of the light strip, and the third side 310 and the fourth side 320 are located on the same side of the light strip. The first side 151 is flush with the third side 310, and / or the third side 310 is flush with the fourth side 320.

[0082] It should be noted that reference Figure 14In the production process of the light strip, the semi-finished light strips are connected side by side. The double-sided adhesive tape with a width approximately equal to that of the semi-finished light strip can be arranged on the back of the semi-finished light strip connected side by side. Then, the semi-finished light strip with the double-sided adhesive tape can be cut to form a single light strip. Since the double-sided adhesive tape is arranged on the back of the semi-finished light strip, the double-sided adhesive tape can be cut to a proper width during the cutting process. Thus, compared with the related art in which the double-sided adhesive tape is arranged on the single semi-finished light strip after the semi-finished light strip is cut, the production efficiency of the light strip can be improved.

[0083] It can be understood that, since the single light strip is obtained by cutting the semi-finished light strip with the double-sided adhesive tape, for the light strips located on both sides of the semi-finished light strip connected side by side, only one side of the light strip is a cutting surface after the cutting, so that the double-sided adhesive layer 300 and the side surface of the light strip 1 on the side of the cutting surface are flush. For the light strip located between both sides of the semi-finished light strip connected side by side, both sides of the light strip are cutting surfaces after the cutting, so that the double-sided adhesive layer 300 and the side surfaces of the light strip 1 on both sides are flush.

[0084] In some embodiments, the light strip further comprises a first dam adhesive 410 and a second dam adhesive 420 extending along the length direction of the circuit board 100, the first dam adhesive 410 and the second dam adhesive 420 are arranged on the two sides away from each other of the light emitting device 200 along the width direction of the circuit board 100, and the light-transmissive adhesive 430 is arranged between the first dam adhesive 410 and the second dam adhesive 420.

[0085] It should be noted that the first dam adhesive 410 and the second dam adhesive 420 can be formed by using a glue with slightly poor fluidity. Thus, the first dam adhesive 410 and the second dam adhesive 420 can be processed by using the glue with slightly poor fluidity. After the first dam adhesive 410 and the second dam adhesive 420 are solidified, the glue with the light-transmissive and light-scattering properties can be arranged between the first dam adhesive 410 and the second dam adhesive 420, and the glue between the first dam adhesive 410 and the second dam adhesive 420 is solidified to form the light-transmissive adhesive 430.

[0086] In some embodiments, the height of the first dam adhesive 410 is greater than the height of the light emitting device 200, and the height of the second dam adhesive 420 is greater than the height of the light emitting device 200.

[0087] It should be noted that reference can be made to the description of the first dam adhesive 410 and the second dam adhesive 420. Figure 15In the process of forming the first dam glue 410 and the second dam glue 420 by using the glue solution with poor flowability, the glue pulling needle 2 of the glue pulling device can be slightly higher than the light emitting device 200. In this way, the collision between the glue pulling needle 2 and the light emitting device 200 can be avoided in the case that the light emitting device 200 has a position error in the width direction of the light strip. Since the glue pulling needle 2 of the glue pulling device is slightly higher than the light emitting device 200, the height of the first dam glue 410 can be greater than the height of the light emitting device 200, and the height of the second dam glue 420 can be greater than the height of the light emitting device 200.

[0088] It should be noted that the relational terms herein such as first and second, and the like, are used solely to distinguish one from another entity or action, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0089] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions, and alterations can be made to the embodiments of the present application without departing from the principles and spirit of the embodiments of the present application, and the scope of the embodiments of the present application is defined by the appended claims and their equivalents.

Claims

1. A wiring board, characterized by, Comprising: a first insulating layer (111), a first conductor layer (120), a second insulating layer (112), a second conductor layer (130) and a third insulating layer (113) arranged in layers; the first conductor layer (120) is provided with a first main power line (121) and a second main power line (122) extending along the length direction of the circuit board; the second conductor layer (130) is provided with a plurality of branch power line groups (131) distributed along the length direction of the circuit board, each branch power line group (131) comprises a plurality of branch power lines (1310), the branch power line (1310) at the two ends of the branch power line group (131) is respectively a first branch power line (1311) and a second branch power line (1312); the circuit board is provided with a plurality of groups of filler holes (141) penetrating from the top surface of the circuit board to the first conductor layer (120), the filler hole (141) comprises a first sub-hole (1411) and a second sub-hole (1412), the first sub-hole (1411) penetrates the first branch power line (1311) and penetrates to the first main power line (121), the second sub-hole (1412) penetrates the second branch power line (1312) and penetrates to the second main power line (122).

2. The circuit board according to claim 1, characterized by the circuit board is provided with a plurality of groups of power line exposed windows (142) penetrating from the top surface of the circuit board to the first conductor layer (120), each group of power line exposed windows (142) is spaced apart along the length direction of the circuit board; the power line exposed window (142) comprises a first sub-exposed window (1421) and a second sub-exposed window (1422), in the thickness direction of the circuit board, the first sub-exposed window (1421) is opposite to the first main power line (121), and the second sub-exposed window (1422) is opposite to the second main power line (122).

3. The circuit board according to claim 2, wherein the surface of the first main power line (121) in the area surrounded by the first sub-exposed window (1421) is provided with a first tin layer (1431), and the surface of the second main power line (122) in the area surrounded by the second sub-exposed window (1422) is provided with a second tin layer (1432).

4. The circuit board according to claim 3, wherein the circuit board is a flexible circuit board, the thickness of the first tin layer (1431) is less than or equal to 0.1 millimeter, and the thickness of the second tin layer (1432) is less than or equal to 0.1 millimeter.

5. The circuit board of claim 2, wherein in the length direction of the circuit board, each power line exposed window (142) is located in the boundary area of adjacent branch power line groups (131).

6. A light strip, characterized in that Comprising: a light emitting device (200) and the circuit board of any one of claims 1 to 5; each light emitting device (200) is arranged on the circuit board along the length direction of the circuit board, and the light emitting device (200) is electrically connected to the branch power line group (131) in one-to-one correspondence, so that the branch power line group (131) and the light emitting device (200) corresponding thereto form a light emitting circuit.

7. The light strip of claim 6, wherein, The first sub-hole (1411) is filled with a first conductive piece (1441) electrically connecting the first branch power line (1311) and the first main power line (121); the second sub-hole (1412) is filled with a second conductive piece (1442) electrically connecting the second branch power line (1312) and the second main power line (122), and the normal projection of the light emitting device (200) on the circuit board is distributed in a staggered manner with the filler hole (141).

8. The light strip of claim 7, wherein, The first conductive piece (1441) is formed by solidification of liquid metal filled in the first sub-hole (1411), and the second conductive piece (1442) is formed by solidification of liquid metal filled in the second sub-hole (1412).

9. The light strip of claim 6, wherein, The lamp strip further comprises a double-sided adhesive layer (300) adhered to the bottom surface of the circuit board, the circuit board comprises a first side (151) and a second side (152) along the width direction of the circuit board, the double-sided adhesive layer (300) comprises a third side (310) and a fourth side (320) along the width direction of the circuit board, the first side (151) and the third side (310) are located on the same side of the lamp strip, and the third side (310) and the fourth side (320) are located on the same side of the lamp strip. The first side (151) is flush with the third side (310), and / or the third side (310) is flush with the fourth side (320).

10. The light strip of claim 6, wherein, The lamp strip further comprises a first dam adhesive (410) and a second dam adhesive (420) extending along the length direction of the circuit board, the first dam adhesive (410) and the second dam adhesive (420) are arranged on the two sides away from each other of the light emitting device (200) along the width direction of the circuit board, and a light-transmitting adhesive (430) is arranged between the first dam adhesive (410) and the second dam adhesive (420). The height of the first dam adhesive (410) is greater than the height of the light emitting device (200), and the height of the second dam adhesive (420) is greater than the height of the light emitting device (200).

Images