CN205648195U

CN205648195U - Circuit board and penetrating LED display screen

Info

Publication number: CN205648195U
Application number: CN201620466521.0U
Authority: CN
Inventors: 柳梦洁; 陶波; 陶志萍
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-05-20
Filing date: 2016-05-20
Publication date: 2016-10-12
Anticipated expiration: 2026-05-20

Abstract

The utility model belongs to the technical field of the display screen technique and specifically relates to a circuit board and penetrating LED display screen is related to. Including PCB board and LED paster, the subsides of LED paster are covered the top of PCB board forms the circuit board, the PCB board includes the polyester resin layer and pastes the copper foil plate in polyester resin layer both sides, the top of copper foil plate all sets up a plurality of half thru holes, the surface and the periphery of half thru hole all cover and have the copper foil, the formation pad, the inside packing of half thru hole has soldering tin, and passes through soldering tin will the LED paster is fixed, make soldering tin big with the area of contact of LED paster pin and soldering tin and pad, two liang are difficult for breaking away from, table traditional relatively pastes technology and the heat transfer that technology has great area is pasted to the side, and the heat conductivity is good, the circuit board also sinks copper in manufacturing process handles, has plated heavy copper on half thru hole surface, makes the welding reliable more firm, does benefit to the heat dissipation, and it is big to have the visual angle angle, advantage that the luminousness is high.

Description

A kind of wiring board and penetrating LED display

Technical field

This utility model relates to display screen technology field, especially relates to a kind of wiring board and penetrating LED Display screen.

Background technology

Tradition LED display majority is that LED is affixed on PCB surface, and wiring board reassembles to be tied at casing Forming LED display unit on component, this way technique is simple, but product ventilation and heat performance is not Good, the daylighting formation to indoor and outdoor is blocked, and penetrating LED display can well solve these Problem, penetrating LED display is by wiring board side then wiring board is edge-on by LED paster Assembling, the space between two wiring boards can form penetrating effect, adopts and constitutes in this way LED display thickness volume reduce 40% one 60%, weight saving 60% one 80%, finally make should With more perfect.

And for LED paster welding manner on pcb board, main region is divided into top luminous and side is luminous, Side is luminous: after LED paster is welded in pcb board, light emission direction is perpendicular to pcb board；Top luminescence: LED pastes After sheet is welded in pcb board, light emission direction is parallel to pcb board.

Luminous in order to realize the side of LED paster, it is common that to select conventional LED paster and be welded on PCB Top between the two sides of plate, and the Type of Welding that LED paster is in pcb board top has main two Kind, specific as follows:

Surface Mount technique:

As depicted in figs. 1 and 2, the top at pcb board is cut (V) and is slit into separate part conduct Pad, then the pin of LED paster is welded on corresponding pad by scolding tin respectively.Above-mentioned Surface Mount work Skill, although LED paster can be fixed on the top of pcb board, but have problems with: (1) V cuts Rear easy damaged pad, pad is easy to fall off, and soldering reliability is the highest.(2) PCB lamp board shape is limited can not do Abnormity lamp plate.(3) because being pad cutting to be divided into two with V cutter, V oral area partial volume Yi Lianxi makes Becoming short circuit, fraction defective is high.

Side patch technique:

As shown in Figure 3 and Figure 4, LED paster being pressed the top in pcb board, pad lays respectively at The two sides of pcb board.LED paster extends outside part outside corresponding side surface by scolding tin and respective side The pad in face realizes welding.Above-mentioned side patch technique, compares Surface Mount technique and can be applicable to the weldering of sketch plate Connect, but have problems with: the distance of (1) LED with LED is restricted, and pixel point density is the highest, no Point can be applied to away from screen.(2) LED is attached to the side of plate, applies and can reduce penetrating degree on transparent screen. (3) the broadcasting visual angle of screen body is restricted.(4) scolding tin is little with the contact area of LED paster pin, LED It is easily separated between paster and scolding tin and soldering tin technique is difficult to control to, the problem being susceptible to rosin joint solder skip, And poor thermal conductivity.

Utility model content

The purpose of this utility model is the wiring board of offer and penetrating LED display, existing to solve The scolding tin deposited in technology is with contact pads area is little, LED paster is easily separated from, poor thermal conductivity, easy rosin joint The technical problem of solder skip；And applied while can well embodying penetrating sense on transparent screen Guarantee that visible angle maximizes.

This utility model provides a kind of wiring board, including pcb board and LED paster, described LED paster It is covered in the top of described pcb board, forms wiring board；

Described pcb board includes polyester resin layer and is pasted onto the copper foil plate of described polyester resin layer both sides, Described copper foil plate is covered with insulation film；

The top of described copper foil plate is respectively provided with multiple half open-work, and surface and the periphery of described half open-work all cover There is Copper Foil, thus form pad；

The inside of described half open-work is filled with scolding tin, and is carried out by described LED paster by described scolding tin Fixing；

This wiring board is big with the contact area of pad with LED paster pin and scolding tin due to scolding tin, makes It is not easily disconnected from two-by-two；Relatively conventional Surface Mount technique and side patch technique also have the heat biography of larger area Pass, there is the advantage that heat conductivity is good.

Further, the bottom of described LED paster is provided with LED paster pin, described LED paster Pin is fixed on the scolding tin within described half open-work by the way of a glue or fixture, by LED paster Tentatively fix.

Further, the top of every piece of described copper foil plate is uniformly arranged multiple half open-work, and described in two pieces Described half open-work homogeneous one on copper foil plate is correspondingly arranged, it is simple to fixing of LED paster.

Further, it is provided with fabrication hole between described half open-work being correspondingly arranged, it is simple to leading to of liquid medicine Cross, for copper facing.

Further, described semi-transparent hole surface and periphery are also coated with heavy layers of copper, it is possible to make welding position Scolding tin is filled in cavity, makes welding relatively reliable firmly, is beneficial to heat radiation.

Further, described pcb board is set to plane pcb board or abnormity pcb board, it is possible to make lamp bar Shape is changeable, applied range.

Further, described half open-work is set to semicircle, half elliptic or half square open-work.

Further, described pad is set to annular or square.

Further, the degree of depth of described half open-work is set to 0.4mm-0.6mm.

This utility model also provides for a kind of penetrating LED display using described wiring board, including circuit Plate and for fixing the location structure of described wiring board, and between adjacent two described wiring boards, form sky Gap；

Described wiring board is formed module by edge-on assembling of described location structure, and described module spliced is connected together Form large-area LED display；

Formation due to space can improve the transparent performance of LED display, it is ensured that visible angle is maximum Change, improve the lighting conditions at dress screen position.

The beneficial effects of the utility model are:

The wiring board that this utility model provides is due to scolding tin and LED paster pin and scolding tin and pad Contact area is big, makes to be not easily disconnected from two-by-two；Relatively conventional Surface Mount technique and side patch technique also have The heat transfer of larger area, has the advantage that heat conductivity is good；And semi-transparent hole surface and periphery are also coated with Heavy copper, it is possible to make the scolding tin of welding position be filled in cavity, make welding relatively reliable firmly, is beneficial to Heat radiation, also has visual angle angle big, the advantage that light transmittance is high.

The penetrating LED display that this utility model provides, by shape between adjacent two described wiring boards Become space, owing to the formation in space can improve the transparent performance of LED display, it is ensured that visible angle Maximize, improve the lighting conditions at dress screen position；But also improve the ventilation and heat of LED display Performance, and make LED display have the highest wind resistance, substantially increase indoor and outdoor large area and show The safety of display screen.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model detailed description of the invention or technical side of the prior art Case, will make simply the accompanying drawing used required in detailed description of the invention or description of the prior art below Introduce, it should be apparent that, the accompanying drawing in describing below is embodiments more of the present utility model, right From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to These accompanying drawings obtain other accompanying drawing.

The structural representation of the wiring board that Fig. 1 provides for this utility model embodiment；

Fig. 2 is the partial enlarged drawing of the wiring board described in Fig. 1；

Fig. 3 is the sectional side view of the wiring board described in Fig. 1；

Fig. 4 is the structural representation of the pcb board of the wiring board described in Fig. 1；

Fig. 5 is the partial enlarged drawing of the pcb board of the wiring board described in Fig. 4；

The structural representation of the wiring board that Fig. 6 provides for this utility model embodiment；

Fig. 7 is the structural representation of the penetrating LED display using the wiring board described in Fig. 1；

Reference:

1-LED paster；2-PCB plate；3-location structure；

4-space；

11-LED paster pin；21-pad；22-half open-work；

23-scolding tin；24-sinks layers of copper；25-copper foil plate；

26-polyester resin layer.

Detailed description of the invention

Below in conjunction with accompanying drawing, the technical solution of the utility model is clearly and completely described, aobvious So, described embodiment is a part of embodiment of this utility model rather than whole embodiments. Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative work The every other embodiment obtained under premise, broadly falls into the scope of this utility model protection.

In description of the present utility model, it should be noted that term " " center ", " on ", D score, Orientation or the position relationship of the instruction such as "left", "right", " vertically ", " level ", " interior ", " outward " are Based on orientation shown in the drawings or position relationship, it is for only for ease of description this utility model and simplification is retouched State rather than indicate or imply that the device of indication or element must have specific orientation, with specifically Azimuth configuration and operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " the One ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that instruction or imply relatively heavy The property wanted.

In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, Term " is installed ", " being connected ", " connection " should be interpreted broadly, for example, it may be fixing even Connect, it is also possible to be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electricity Connect；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two elements Internal connection.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition Language concrete meaning in this utility model.

Below by specific embodiment and combine accompanying drawing and this utility model is done further retouch in detail State.

The wiring board that this utility model provides, including pcb board and LED paster, described LED paster pastes Overlay on the top of described pcb board, form wiring board；

The structural representation of the wiring board that Fig. 1 provides for this utility model embodiment；Fig. 2 is Fig. 1 institute The partial enlarged drawing of the wiring board stated；Fig. 3 is the sectional side view of the wiring board described in Fig. 1；Fig. 4 is Fig. 1 The structural representation of the pcb board of described wiring board；Fig. 5 is the pcb board of the wiring board described in Fig. 4 Partial enlarged drawing；As Figure 1-5, the wiring board that the present embodiment provides, including pcb board and LED Paster 1, LED paster 1 is covered in the top of pcb board, forms wiring board；

Pcb board includes polyester resin layer 26 and is pasted onto the copper foil plate 25 of polyester resin layer 26 both sides, Copper foil plate 25 is covered with insulation film；

The top of copper foil plate 25 is respectively provided with multiple half open-work 22, and surface and the periphery of half open-work 22 all cover There is Copper Foil, thus form pad 21；

The inside of half open-work 22 is filled with scolding tin 23, and is carried out by LED paster 1 solid by scolding tin 23 Fixed；

This wiring board connects due to scolding tin 23 and LED paster pin 11 and scolding tin 23 and pad 21 Contacting surface is long-pending big, makes to be not easily disconnected from two-by-two；Relatively conventional Surface Mount technique and side patch technique also have relatively Large-area heat transfer, has the advantage that heat conductivity is good.

In the present embodiment alternative, the bottom of LED paster 1 is provided with LED paster pin 11, LED Paster pin 11 is fixed on the scolding tin 23 within half open-work 22 by the way of a glue or fixture, will LED paster 1 is tentatively fixed.

In the present embodiment alternative, the top of every piece of copper foil plate 25 is uniformly arranged multiple half open-work 22, And the half equal one_to_one corresponding of open-work 22 on two pieces of copper foil plates 25 is arranged, it is simple to fixing of LED paster 1.

In the present embodiment alternative, between half open-work 22 being correspondingly arranged, it is provided with fabrication hole, it is simple to Passing through of liquid medicine, for copper facing.

In the present embodiment alternative, half open-work 22 surface and periphery are also coated with heavy layers of copper 24, it is possible to make The scolding tin 23 of welding position is filled in cavity, makes welding relatively reliable firmly, is beneficial to heat radiation.

In the present embodiment alternative, pcb board is set to plane pcb board.

In the present embodiment alternative, half open-work 22 can be set to semicircle or half elliptic semi-transparent Hole 22.

In the present embodiment alternative, pad 21 is set to annular.

In the present embodiment alternative, pcb board 2 is set to four layers of pcb board.

In conjunction with above to detailed description of the present utility model it can be seen that the wiring board that provides of the present embodiment Owing to scolding tin 23 is big with the contact area of pad 21 with LED paster pin 11 and scolding tin 23, make It is not easily disconnected from two-by-two；Relatively conventional Surface Mount technique and side patch technique also have the heat biography of larger area Pass, there is the advantage that heat conductivity is good；And half open-work 22 surface and periphery are also coated with heavy copper, it is possible to make The scolding tin 23 of welding position is filled in cavity, makes welding relatively reliable firmly, is more favorable for wiring board Heat radiation.

The structural representation of the wiring board that Fig. 6 provides for this utility model embodiment；As shown in Figure 6, The wiring board that the present embodiment provides, to be that pcb board can also be set to different with the distinctive points of embodiment 1 Shape pcb board, it is possible to make lamp strip changeable, applied range；

Meanwhile, half open-work 22 can also be set to square half open-work 22；

Pad 21 is shaped to square.

In conjunction with above to detailed description of the present utility model it can be seen that the wiring board that provides of the present embodiment Owing to scolding tin 23 is big with the contact area of pad 21 with LED paster pin 11 and scolding tin 23, make It is not easily disconnected from two-by-two；Relatively conventional Surface Mount technique and side patch technique also have the heat biography of larger area Pass, there is the advantage that heat conductivity is good；And pcb board is also configured to abnormity pcb board, has angle, visual angle Degree is big, the advantage that light transmittance is high, additionally it is possible to make lamp strip changeable, applied range.

Fig. 7 is the structural representation of the penetrating LED display using the wiring board described in Fig. 1；Such as Fig. 7 Shown in, the penetrating LED display that the present embodiment provides, including wiring board with for fixing circuit board Space 4 is formed between location structure 3, and adjacent two wiring boards；

Wiring board is formed module by edge-on assembling of location structure 3, and module spliced is connected together formation large area LED display；

Formation due to space 4 can improve the transparent performance of LED display, improves dress screen position Lighting conditions；But also improve the ventilation and heat performance of LED display, and make LED display There is the highest wind resistance, substantially increase the safety of indoor and outdoor large-area displays screen.

The processing technology also providing for a kind of wiring board of the present utility model, comprises the following steps:

Step one: by light-sensitive surface, exposure and the fixing circuit being etched needing on two-sided PCB Figure, is then carving dual platen overlying insulation film and the Copper Foil of oversampling circuit, by High Temperature High Pressure by copper Paper tinsel presses together, and forms copper foil layer, thus obtains pcb board；

Step 2: hole respectively in step one pcb board both sides, and drilling depth is arranged on Between 0.4mm-0.6mm, then in the middle of two holes, the fabrication hole that liquid medicine passes through is easy in processing one, Thus obtain pcb board with holes；

Step 3: by the pcb board with holes in step 2, puts into and carries out heavy process for copper process in liquid medicine, After heavy process for copper terminates, then obtain circuitous pattern through overexposure, fixing and etching, then pass through computer Gong bed, removes the half gong in the hole of pcb board both sides, retains second half and forms it into one and half open-works 22；

Step 4: make the face of patch LED paster 1 straight by fixture the side of the pcb board in step 3 Vertical, then brush scolding tin 23 on half open-work 22, then by SMT (surface component encapsulation technology) by LED Paster 1 is attached to the side of pcb board, through the air return stove of 8 warm areas, by pad 21 and semicircle pad Scolding tin 23 thawing in 21 welds together, thus obtains required wiring board.

In the present embodiment alternative, the degree of depth that half open-work 22 obtains is set to 0.5mm.

The processing technology of the wiring board that this utility model provides is passed through to hole respectively in pcb board both sides, And carry out heavy process for copper process, the most again the half gong in hole is removed, retain second half and form it into one Half open-work 22, is fixed LED paster 1 by half open-work 22, obtains visual angle angle big, and light transmittance is high Wiring board.

Contrast with prior art:

Being divided into two feet weld owing to cutting to cut entirety pad by V, pad is cut for strength Meeting has damage easy to fall off by external force, and welding stannum area is little, and strength reliability is poor, poor thermal conductivity, because of In the middle of pad by V groove separately, molten stannum is easy to adhesion short circuit at V groove, and first-pass yield is very poor；Pass through Side bonding pads welds, and contact surface is little, and two-weld process difficulty controls, poor thermal conductivity.

This patent melts tin welding by the embedded pad in side, adds bonding area, and scolding tin forms pawl Shape is wrapped in device side, and weld strength is substantially improved, and greatly improves LED heat conductivity and first-pass yield. This Embedded pad can form the cavity of a molten stannum at 1-2,3-4 layer of PCB, by scolding tin In being wrapped in firmly, make to be formed between PDB and LED a strong pad, big molten stannum Cavity can be prevented effectively from the rosin joint because stannum amount causes not, not prison welding etc. affects the factor of first-pass yield, It is known that the too high meeting of temperature directly affects the life-span answering LED die, the tune meter of LED lamp bead is by crystalline substance Unit is placed directly against on pin, carries out soldering with spun gold, so the temperature of LED lamp bead only passes through pin By heat carrying-off, this design is by heap stannum a large amount of at pin, it is possible to reliable and effective guarantee heat passes Lead.

It is last it is noted that various embodiments above is only in order to illustrate the technical solution of the utility model, It is not intended to limit；Although this utility model being described in detail with reference to foregoing embodiments, It will be understood by those within the art that: it still can be to the skill described in foregoing embodiments Art scheme is modified, or the most some or all of technical characteristic is carried out equivalent；And this A little amendments or replacement, do not make the essence of appropriate technical solution depart from this utility model each embodiment skill The scope of art scheme.

Claims

1. a wiring board, it is characterised in that including: pcb board and LED paster, described LED Paster is covered in the top of described pcb board, forms wiring board；

The top of described copper foil plate is respectively provided with multiple half open-work, and surface and the periphery of described half open-work are equal It is covered with Copper Foil, thus forms pad；

The inside of described half open-work is filled with scolding tin, and is entered by described LED paster by described scolding tin Row is fixing.

Wiring board the most according to claim 1, it is characterised in that the end of described LED paster Portion is provided with LED paster pin, and described LED paster pin is fixed by the way of a glue or fixture On the scolding tin within described half open-work.

Wiring board the most according to claim 1, it is characterised in that every piece of described copper foil plate Homogeneous a pair of described half open-work that top is uniformly arranged on multiple half open-work, and two pieces of described copper foil plates Should arrange.

Wiring board the most according to claim 3, it is characterised in that described half be correspondingly arranged Fabrication hole it is provided with between open-work.

Wiring board the most according to claim 1, it is characterised in that described semi-transparent hole surface and Periphery is also coated with heavy layers of copper.

Wiring board the most according to claim 1, it is characterised in that described pcb board is set to Plane pcb board or abnormity pcb board.

Wiring board the most according to claim 1, it is characterised in that described half open-work is set to Semicircle, half elliptic or half square open-work.

Wiring board the most according to claim 1, it is characterised in that described pad is set to ring Shape or square.

Wiring board the most according to claim 3, it is characterised in that the degree of depth of described half open-work It is set to 0.4mm-0.6mm.

10. the LED display of use wiring board described in any one of claim 1-9, its feature It is, including wiring board with for fixing the location structure of described wiring board, and described in adjacent two Space is formed between wiring board；

Described wiring board is formed module by edge-on assembling of described location structure, and described module spliced is connected on one Rise and form large-area LED display.