CN205050865U - LED circuit board - Google Patents

Abstract

The utility model discloses an LED circuit board, which comprises a power line, a first thermoelectric wire and a second thermoelectric wire arranged in parallel in turn, and also includes a plurality of reinforcing ribs arranged in the parallel direction and vertical direction, and the reinforcing rib Connect the power line, the first thermoelectric wire and the second thermoelectric wire, the first thermoelectric wire and the second thermoelectric wire are provided with a heat dissipation area and a light emitting area between two adjacent reinforcing ribs, and the light emitting area An LED lamp holder is provided, and an LED lamp cup is arranged on the upper part of the LED lamp holder. The first thermoelectric wire and the second thermoelectric wire pass through the LED lamp holder and are located at the bottom of the LED lamp cup. The utility model is injection molding after the whole metal plate is formed once, which integrates the functions of electric conduction and heat conduction; the LED lamp can be directly formed on the circuit board; the heat dissipation area of the thermoelectric wire can directly dissipate the heat, and can also be connected to other heat dissipation functions. On the components, the heat dissipation performance is better.

Description

A LED circuit board

technical field

The utility model relates to the field of LED lamp manufacture, in particular to an LED circuit board.

Background technique

LED (Light Emitting Diode), light emitting diode, is a solid-state semiconductor device that can directly convert electricity into light. The heart of LED is the wafer of a semiconductor, and one end of wafer is attached on a bracket, and one end is negative pole, and the other end connects the positive pole of power supply, and whole wafer is encapsulated by epoxy resin. Semiconductor wafer is made up of two parts, and a part is P-type semiconductor, and hole occupies an leading position in it, and the other end is N-type semiconductor, and here mainly is electron. But time these two kinds of semiconductors couple together, between them, just form a "P-N junction". When electric current acts on this chip by wire time, electron will be pushed to P district, and in P district, electron is with hole recombination, then will send energy with the form of photon, the principle of LED luminescence that Here it is. And the wavelength of light i.e. the color of light, be determined by the material forming P-N junction.

The practicality and commercialization of high-performance LEDs have brought about a new revolution in lighting technology. The pixel light composed of multiple ultra-high-brightness red, blue, and green LEDs can not only emit various colors of light with continuously adjustable wavelengths, but also emit white light with a brightness of tens to one hundred candlepower as a lighting source. For incandescent lamps and LED solid-state lighting lamps with the same luminance, the power consumption of the latter only accounts for 10%-20% of the former.

Currently, white LEDs are mostly made by coating blue LEDs with a yellowish phosphor coating, usually by grinding cerium-doped yttrium aluminum garnet crystals into powder and mixing them in a made from a dense adhesive. When the LED chip emits blue light, part of the blue light will be efficiently converted into a broad-spectrum mainly yellow light by the crystal, because the yellow light will stimulate the red and green light receptors in the naked eye, and then mix the blue light of the LED itself , making it look like white light.

The existing manufacturing process of LED lamps is pressure welding, encapsulation and curing. Pressure welding is to pressure-weld the LED chip to the electrode; LED packaging is to encapsulate the mixture of phosphor powder and epoxy resin on the bonded LED chip; curing is to fully cure the mixture of epoxy resin and phosphor powder. There are three main methods of LED packaging: dispensing, potting, and molding. It is not easy to control the amount of dispensing in LED dispensing packaging, because the mixture of epoxy resin and phosphor will become viscous during use, and the dispensing of white LEDs also has the problem of phosphor precipitation leading to chromatic aberration. LED potting and encapsulation is to put the pressure-welded LED bracket into the LED molding cavity, then inject the mixture of liquid epoxy resin and phosphor powder into the LED molding cavity, and finally put it into the oven to make the liquid epoxy resin and fluorescent powder The powder mixture is cured, and the encapsulation also has the problem of fluorescent powder precipitation leading to chromatic aberration. LED molded packaging is to put the pressure-welded LED bracket into the mold, then close the upper and lower molds with a hydraulic press and vacuumize, put the mixture of solid epoxy resin and fluorescent powder at the entrance of the injection channel to heat, Then press it into the rubber channel of the mold with a hydraulic ejector pin, and the mixture of epoxy resin and phosphor is melted by heat and enters into each LED molding groove along the rubber channel to be cured.

Utility model content

In order to overcome the deficiencies of the prior art, the utility model provides an LED circuit board, which includes a power line, a first thermoelectric wire and a second thermoelectric wire arranged in parallel in sequence, and also includes a plurality of Reinforcing ribs, the reinforcing ribs are connected to the power line, the first thermoelectric wire, and the second thermoelectric wire, and the part between the first thermoelectric wire and the second thermoelectric wire is provided with a heat dissipation area and The light-emitting area is provided with an LED lamp holder, and an LED lamp cup is arranged on the upper part of the LED lamp holder. The first thermoelectric wire and the second thermoelectric wire pass through the LED lamp holder and are located on the LED lamp bottom of the cup.

As an improvement of the above solution, the reinforcing rib is used to connect the power supply wire, the first thermoelectric wire, the part of the second thermoelectric wire and the part between the first thermoelectric wire and the second thermoelectric wire between two adjacent reinforcing ribs Disconnect at a specific location.

As an improvement of the above solution, the bottom of the LED lamp cup is circular and gradually expands upward in an arc shape, the uppermost opening of the cup is circular, and the edge of the opening has an upward protrusion.

As an improvement of the above solution, an independent power line is arranged parallel to the second thermoelectric wire, and the independent power line is connected to the second thermoelectric wire through the reinforcing rib.

As an improvement of the above solution, the power cord, the reinforcing rib and the independent power cord are covered with a circuit protection layer.

As an improvement of the above solution, the gap between the first thermoelectric wire and the second thermoelectric wire in the heat dissipation area is filled with the same/different material of the circuit protection layer.

As an improvement of the above solution, the second thermoelectric wires in the light emitting area are symmetrically arranged in an inverted "L" shape and the first thermoelectric wires in the light emitting area are symmetrically arranged in an inverted "L" shape.

As an improvement to the above solution, the first thermoelectric wire in the heat dissipation area has a downwardly protruding arc, and the second thermoelectric wire in the heat dissipation area has a downwardly protruding arc.

As an improvement of the above solution, the shape of the downwardly protruding arc-shaped bottom is straight, and the arc-shaped bottom is on the same plane as the bottom of the circuit protection layer.

Compared with the prior art, the utility model discloses an LED lamp circuit board.

Description of drawings

In order to illustrate the embodiments of the present utility model more clearly, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only an embodiment of the present utility model. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the structural representation of a specific embodiment of the present utility model;

Fig. 2 is the internal circuit diagram in the specific embodiment among Fig. 1;

Fig. 3 is a state diagram before the internal circuit of the specific embodiment in Fig. 2 is not broken;

Fig. 4 is a structural perspective view of the specific embodiment in Fig. 1 after LED chips are installed;

Fig. 5 is a schematic structural diagram of the internal circuit in Fig. 2 after LED chips are installed;

Fig. 6 is a partial enlarged view of the specific embodiment in Fig. 1;

In the figure: 1-power cord; 2-first thermoelectric wire; 3-second thermoelectric wire; 4-independent power cord; - LED light cup; 10 - LED chips.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Fig. 1 and Fig. 2, an LED circuit board of the present invention, each LED circuit board includes a power line 1, a first thermoelectric wire 2 and a second thermoelectric wire 3 arranged in parallel in turn, and also includes a power cord arranged in the parallel direction. A plurality of ribs 5 in the vertical direction, the ribs 5 connect the power line 1, the first thermoelectric wire 2 and the second thermoelectric wire 3, the first thermoelectric wire 2 and the second thermoelectric wire 3 are adjacent The part between the two reinforcing ribs 5 is provided with a heat dissipation area 7 and a light-emitting area 6, the light-emitting area 6 is provided with an LED lamp holder 8, an LED lamp cup 9 is provided on the upper part of the LED lamp holder, and the first thermoelectric wire 2 and the second thermoelectric wire 3 pass through the LED lamp holder 8 and are located at the bottom of the LED lamp cup 9 .

Figure 2 shows the situation where two LED lamps are connected in parallel and then connected in series with the following two LED lamps connected in parallel. Those skilled in the art can also obtain a circuit in which multiple LED lamps are connected in parallel and then connected in series with multiple LED lamps connected in parallel at the back without having to pay creative labor. Similarly, it is also possible to obtain a circuit in which multiple LED lamps are connected in series and then connected in series with the rear A circuit in which multiple LED lights are connected in parallel.

Please refer to FIG. 4 and FIG. 5 , the light-emitting area 6 is used to install LED lamps. The LED chip 10 can be welded or pasted between the first thermoelectric wire 2 and the third thermoelectric wire 3 at the bottom of the LED lamp cup 9, and then injected into a mixture of fluorescent powder and mold top glue to form an LED lens, LED chip 10, fluorescent The mixture of powder and mold top glue constitutes the LED lamp bead. The power line 1, the first thermoelectric wire 2, the third thermoelectric wire 3 and the rib 5 constitute the LED circuit board, and by controlling the power cord 1, the first thermoelectric wire 2, the third thermoelectric wire 3 and the rib 5 at a certain The on-off of these positions can form the required multiple LED lights in series and then in parallel or first in parallel and then in series.

Please refer to FIG. 6 , the bottom of the LED lamp cup 9 is circular, and gradually expands upward in an arc shape, and its uppermost opening is circular, and the edge of the opening has an upward protrusion. When the mixture of phosphor powder and mold top glue is injected, the mixture of phosphor powder and mold top glue becomes hemispherical under the action of surface tension.

In one embodiment of the present utility model, an independent power line 4 is arranged parallel to the second thermoelectric wire 3 , and the independent power line 4 is connected to the second thermoelectric wire 3 through the reinforcing rib 5 . When a power controller is used to supply power to the LED circuit board, if the power supply is single-ended, it is only necessary to connect the positive and negative poles of the power controller to the power line 1 and the first thermoelectric wire 2 or the second thermoelectric wire 3. Yes; if double-ended power supply is required, the current at the other end needs to be led to the end with the power controller through the independent power line 4.

The structure of the power cord 1 , the first thermoelectric wire 2 , the second thermoelectric wire 3 , the independent power cord 4 and the reinforcing rib 5 is a metal plate integrally formed at one time, and the processing method can be stamping or hub rolling. The material of the metal plate is any conductive metal or its alloy. After integral stamping or hub roll forming followed by injection molding, the part of the reinforcing rib 5 used for connecting the independent power cord 4 is punched off, so as to maintain the independence of the independent power cord.

Please refer to FIG. 1 , the power cord 1 , the rib 5 and the independent power cord 4 are covered with a circuit protection layer. The material of the circuit protection layer can be the same as that of the LED lamp holder 8 and the LED lamp cup 9 , and then one-time injection molding is performed on the basis of a stamped or wheel-rolled metal plate. The space between the first thermoelectric wire 2 and the second thermoelectric wire 3 in the heat dissipation area 7 may also be filled with the same material as the circuit protection layer, or they may be separated from each other without filling. The circuit protection layer on the outside of the power line 1, the independent power line 4 and the reinforcing rib 5 further strengthens the rigidity of the LED circuit board and can also prevent the circuit from short circuiting.

Please refer to Fig. 2 and Fig. 3, the second thermoelectric wire and the first thermoelectric wire in the light-emitting area are arranged in parallel, and the interval between the two is usually relatively large. There will be LED chips installed between the thermoelectric wires, and the LED chips are usually relatively small. In order to better weld/bond the LED chips, the second thermoelectric wires 3 in the light-emitting area 6 are usually arranged as symmetrically arranged inverted "L" ” type, that is, protruding a part to be closer to the first thermoelectric wire 2. At the same time, the first thermoelectric wire 2 in the light emitting area 6 may be symmetrically arranged in an inverted "L" shape, or the first thermoelectric wire 2 and the second thermoelectric wire 3 in the light emitting area 6 may be symmetrically arranged in an inverted "L" shape. L" type.

The first thermoelectric wire 2 and the second thermoelectric wire 3 of the heat dissipation area 7 are used to dissipate heat, and the LED lamp will generate a large amount of heat in the process of emitting light, and the heat passes through the first thermoelectric wire 2 and the second thermoelectric wire 3 in the heat dissipation area. Part of 7 goes out. However, it is often not enough to dissipate heat into the air or other media in contact with it through the heat dissipation area 7 , and sometimes it is necessary to connect the heat dissipation area 7 to other heat dissipation components to dissipate heat faster. At this time, the first thermoelectric wire 2 and/or the second thermoelectric wire 3 in the heat dissipation area 7 may be provided with a downwardly protruding arc, so as to attach to the other heat dissipation components. At the same time, since the first thermoelectric wire 2 and the second thermoelectric wire 3 are made of metal, their thermal conductivity is better, and they can be directly welded to other heat dissipation components without being bonded to other heat dissipation components through an insulating layer.

In another preferred embodiment of the present utility model, the downwardly protruding arc-shaped bottom shape of the first thermoelectric wire 2 and/or the second thermoelectric wire 3 in the heat dissipation area 7 is set to be straight, and It is on the same plane as the bottom of the circuit protection layer. When the downward protruding arc-shaped welding of the first thermoelectric wire 2 and/or the second thermoelectric wire 3 in the straight heat dissipation area 7 is welded or attached to other heat dissipation components, its contact area is larger, and the heat conduction effect is greater. Even better, it can not only dissipate heat through other heat dissipation components, but also directly dissipate heat into the air or other media in contact with it.

In another preferred embodiment of the present utility model, the straight downwardly protruding arc-shaped bottom and the circuit protection layer of the power cord 1, the reinforcing rib 5 and the independent power cord 4 and the LED The bottom of the lamp holder 8 is flush, so that when the LED circuit board is integrally bonded or welded to other heat dissipation components, the entire bottom is just flush with the heat dissipation components.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and modifications can also be made, these improvements and modifications It is also regarded as the protection scope of the present utility model.

Claims (10)

1. a LED circuit board, it is characterized in that, comprise the power line be arranged in parallel successively, first thermoelectric (al) wire and the second thermoelectric (al) wire, also comprise multiple reinforcements of the vertical direction being arranged on described parallel direction, described reinforcement connects described power line, first thermoelectric (al) wire and the second thermoelectric (al) wire, described first thermoelectric (al) wire and the part of the second thermoelectric (al) wire between two reinforcements closed on are provided with radiating area and luminous zone, described luminous zone is provided with LED seat, described LED seat top is provided with LED lamp cup, described first thermoelectric (al) wire and the second thermoelectric (al) wire are through described LED seat, and be positioned at the bottom of described LED lamp cup.

2. LED circuit board according to claim 1, it is characterized in that, described reinforcement for connecting described power line, the first thermoelectric (al) wire, the part of the second thermoelectric (al) wire and described first thermoelectric (al) wire, the part of the second thermoelectric (al) wire between two reinforcements closed on disconnect at ad-hoc location.

3. LED circuit board according to claim 1, is characterized in that, the bottom of described LED lamp cup is circular, and upwards arc-shaped expands gradually, and its top opening is circular, and edge of opening has projection upwards.

4. LED circuit board according to claim 1, is characterized in that, described second thermoelectric (al) wire is other is also provided with an independent current source line abreast, and described independent current source line is connected with described second thermoelectric (al) wire by described reinforcement.

5. LED circuit board according to claim 4, is characterized in that, described power line, reinforcement and independent current source line are surrounded by circuit protecting layer.

6. LED circuit board according to claim 5, is characterized in that, described radiating area the first thermoelectric (al) wire and the second thermoelectric (al) wire between filled by identical/different material of described circuit protecting layer.

7. LED circuit board according to claim 1, is characterized in that, the first thermoelectric (al) wire in described luminous zone and the second thermoelectric (al) wire are symmetrically arranged inverted "L" shaped.

8. LED circuit board according to claim 5, is characterized in that, the first thermoelectric (al) wire of described radiating area and the second thermoelectric (al) wire have the arc protruded downwards.

9. LED circuit board according to claim 8, is characterized in that, the curved bottom shape of described downward protrusion is flat.

10. LED circuit board according to claim 9, is characterized in that, the curved bottom shape of described downward protrusion is flat, and the bottom of described curved bottom and described circuit protecting layer is in the same plane.