CN212161852U

CN212161852U - LED lamp strip

Info

Publication number: CN212161852U
Application number: CN202021167655.5U
Authority: CN
Inventors: 尚五明
Original assignee: Shenzhen Yuliang Optoelectronic Technology Co ltd
Current assignee: Shenzhen Yuliang Optoelectronic Technology Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2020-12-15
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a LED lamp strip belongs to the technical field of LED lamp. The utility model discloses a LED lamp strip includes the PCB circuit board, sets up a plurality of luminescence unit on the PCB circuit board, equidistant arranging between the luminescence unit on the PCB circuit board, and the luminescence unit includes lamp pearl support and luminous chip, and luminous chip fixes on the lamp pearl support and adopts the interior encapsulation to be in the lamp pearl support, and lamp pearl support and PCB circuit board welding coat on the PCB circuit board and seal the glue outward, and the encapsulation of the outer encapsulation of gluing is on the PCB circuit board. The utility model discloses a LED lamp strip simple structure, to give off light chip package in lamp pearl support, through lamp pearl support and PCB circuit board welding, when LED lamp strip twists reverse, the luminous chip is difficult for droing from the PCB circuit board, guarantees the luminous homogeneity and the stability of LED lamp strip, makes the light that LED lamp strip sent have linear effect.

Description

LED lamp strip

Technical Field

The utility model relates to a technical field of LED lamp, in particular to LED lamp strip.

Background

At present, a COB lamp strip appears in the market, a plurality of flip chips are directly welded on a PCB lamp plate and then packaged, the lamp strip is uniform in light emission and stable in color, and a low-power chip can be used for manufacturing a high-power LED lamp. However, because the flip chip is small, the electrodes are welded on the PCB, the contact area is too small, and when the light bar is stressed, the chip is easy to loose and weld, so that the chip falls off from the PCB, and the light bar is uneven and unstable in light emission.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a LED lamp strip is provided, one or more among the above-mentioned technical problem can be solved.

The utility model discloses a LED lamp strip includes the PCB circuit board, sets up a plurality of luminescence unit on the PCB circuit board, equidistant arranging between the luminescence unit on the PCB circuit board, and the luminescence unit includes lamp pearl support and luminous chip, and luminous chip fixes on the lamp pearl support and adopts the interior encapsulation to be in the lamp pearl support, and lamp pearl support and PCB circuit board welding coat on the PCB circuit board and seal the glue outward, and the encapsulation of the outer encapsulation of gluing is on the PCB circuit board.

By adopting the technical scheme, when the LED lamp strip is twisted, the light-emitting chip is not easy to fall off from the PCB, the light-emitting uniformity and stability of the LED lamp strip are ensured, and light emitted by the LED lamp strip has a linear effect.

In some embodiments, the light emitting chip is fixed on the lamp bead support by using die bond adhesive.

Through adopting above-mentioned technical scheme, can make luminous chip firmly fix on lamp pearl support.

In some embodiments, the electrodes of the light emitting chip are connected with the pins of the lamp bead support through wires, and the pins of the lamp bead support are electrically connected with the PCB.

By adopting the technical scheme, the light-emitting chip is electrically connected with the PCB.

In some embodiments, the wire is one of gold wire, silver wire, copper wire, or alloy wire.

The gold wire can prolong the service life of the lead, so that the service life of the LED lamp bead is prolonged; the copper wire and the alloy wire can reduce the manufacturing cost of the LED lamp bead; the silver wire is not easy to oxidize and can be stored easily.

In some embodiments, the external sealant is a phosphor gel.

By adopting the technical scheme, the light emitted by the light-emitting chip can be emitted outwards through the fluorescent powder colloid, the light transmittance is high, and the light-emitting effect is good.

In some embodiments, the inner encapsulant is selected from one of a transparent silicone or an epoxy.

Through adopting above-mentioned technical scheme, luminous chip is encapsulated in lamp pearl support, and the light accessible that luminous chip sent seals the gluey outside transmission in.

In some embodiments, the light emitting chip is a flip chip.

By adopting the technical scheme, the high-power LED lamp can be manufactured by using the low-power chip, and the light-emitting effect is improved.

The utility model discloses a LED lamp strip simple structure, to give off light chip package in lamp pearl support, through lamp pearl support and PCB circuit board welding, when LED lamp strip twists reverse, the luminous chip is difficult for droing from the PCB circuit board, guarantees the luminous homogeneity and the stability of LED lamp strip, makes the light that LED lamp strip sent have linear effect.

Drawings

Fig. 1 is a schematic structural view of an LED light bar of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is the utility model discloses a local structure schematic diagram of LED lamp strip.

Reference numerals in the drawings indicate: PCB circuit board 1, lamp pearl support 2, light-emitting unit 3, light-emitting chip 31, outer sealing glue 4, interior sealing glue 5, wire 6.

Detailed Description

To facilitate understanding of the present invention by those skilled in the art, the present invention will be further described with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are given by way of illustration only.

Fig. 1 to 3 schematically show a LED light bar according to the present invention.

As shown in fig. 1 to fig. 3, the utility model discloses a LED lamp strip includes PCB circuit board 1, sets up a plurality of light emitting unit 3 on the PCB circuit board 1, equidistant arranging between light emitting unit 3 is on PCB circuit board 1. The light emitting unit 3 includes a lamp bead support 2 and a light emitting chip 31. The light emitting chip 31 may be a flip blue LED chip or an LED chip of another color. The light emitting chip 31 is a flip chip, and a high-power LED lamp can be manufactured by using a low-power chip, so that the light emitting effect is improved. The light-emitting chip 31 is fixed on the lamp bead support 2 by crystal-fixing glue and packaged in the lamp bead support 2 by an inner sealing glue 5, and the lamp bead support 2 is welded with the PCB 1. The electrode of the light-emitting chip 31 is connected with the pin of the lamp bead support 2 through the lead 6, and the pin of the lamp bead support 2 is electrically connected with the PCB circuit board 1. Wherein, the inner sealing glue 5 is selected from transparent silica gel or epoxy resin. The wire 6 may be a gold wire, a silver wire, a copper wire or an alloy wire. The gold wire has the characteristic of stable performance, and is generally used for preventing oxidation and ensuring stable contact. The common single-electrode chip is of a vertical structure, the bottom can be directly electrified, so that one electrode is omitted, the electrode is directly arranged on a substrate, and the common red-yellow chip is more. The double lines are mostly in a horizontal structure, the anode and the cathode are arranged on the same plane, and the bottom substrate is insulated, so that the blue-green chip is generally used. The copper wires comprise single crystal copper wires and palladium-plated copper wires, and are characterized by low price, the copper wires of various specifications used in lead bonding have the cost of only 1/3-1/10 of gold wires, and the copper wires have great application potential in the aspect of reducing the cost. Copper wire is relatively high in strength to gold wire, so that the copper wire is more suitable for fine wire bonding. The disadvantages are that the copper wire is easy to be oxidized, the bonding process is unstable, and the physical parameters such as hardness, yield strength and the like are higher than those of gold and aluminum. The silver wire is characterized in that the silver wire is easy to store (the copper wire needs to be sealed, the storage period is short, the silver wire does not need to be sealed, the storage period can reach 6-12 months), but the hardness is soft, and the parameter adjustment of a machine table is not very large; the price is lower than that of gold wire and higher than that of copper wire. But is not easy to oxidize, and gas protection is not needed during routing; the pull force is not as strong as that of gold wire, but the light decay time is better than that of gold because silver does not absorb light. Alloy wires, also known as silver alloy wires, are products that replace traditional gold wires in the LED industry. The alloy wire mainly comprises monocrystalline silver, and the content of the monocrystalline silver is 90% -99%. On the basis of gold wire, a great deal of silver is doped, and palladium and other components for keeping IMC stable are various trace elements. The welding wire has the advantages of low price, lower price than a gold wire, higher price than a copper wire and better weldability when being welded with a silver-plated bracket; but requires immature application on old wire bonding equipment or additional nitrogen protection. Has a certain oxidizability, which is the same disadvantage as copper wires, and protective gas is used for packaging.

And an external sealing adhesive 4 is coated on the PCB circuit board 1, and the light-emitting unit 3 is packaged on the PCB circuit board 1 by the external sealing adhesive 4. The outer sealing adhesive 4 is a phosphor adhesive, light emitted by the light emitting chip 31 can be emitted outwards through the phosphor adhesive, and the light emitting chip has high light transmittance and good light emitting effect.

What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims

1. The utility model provides a LED lamp strip which characterized in that: the LED lamp comprises a PCB (printed circuit board), wherein a plurality of light-emitting units are arranged on the PCB, the light-emitting units are arranged at equal intervals on the PCB, each light-emitting unit comprises a lamp bead support and a light-emitting chip, the light-emitting chips are fixed on the lamp bead supports and are packaged in the lamp bead supports by adopting inner sealing glue, the lamp bead supports are welded on the PCB, outer sealing glue is coated on the PCB, and the light-emitting units are packaged on the PCB.

2. The LED light bar of claim 1, wherein: the light-emitting chip is fixed on the lamp bead support by adopting solid crystal glue.

3. The LED lamp bar of claim 1, wherein the electrodes of the light emitting chips are connected with the pins of the lamp bead support through wires, and the pins of the lamp bead support are electrically connected with the PCB.

4. The LED light bar of claim 3, wherein the wires are one of gold wires, silver wires, copper wires or alloy wires.

5. The LED light bar of claim 1, wherein: the external sealing glue is a fluorescent powder colloid.

6. The LED light bar of claim 1, wherein: the internal sealing adhesive is selected from one of transparent silica gel or epoxy resin.

7. The LED light bar of claim 1, wherein: the light emitting chip is a flip chip.