CN203503701U

CN203503701U - Flexible led light source filament

Info

Publication number: CN203503701U
Application number: CN201320637821.7U
Authority: CN
Inventors: 黄毅红
Original assignee: Foochow Round Dot Photoelectricity Technology Corp Ltd
Current assignee: Foochow Round Dot Photoelectricity Technology Corp Ltd
Priority date: 2013-10-16
Filing date: 2013-10-16
Publication date: 2014-03-26
Anticipated expiration: 2023-10-16

Abstract

The utility model relates to an LED lamp, and especially relates to an LED light source filament. In the flexible LED light source filament, a P-N junction is packaged with sapphire to form a single LED wafer, and the single LED wafer is fixed on a substrate by mixture of fluorescent powders and epoxy resin. The key points of design lie in that a fixing hole which can hold the LED wafer and is used to fix the single LED wafer is designed on the substrate. The fixing hole is a two-segment hole which is larger on an upper part and smaller on a lower part. A larger hole is a counter bore, and the smaller hole is a through-hole. The inner diameter of the smaller hole is smaller than external diameter of the LED wafer. The filament solves a disadvantage that a single surface of an LED gives out light, and improves lighting effect, reduces temperature, prolongs life of the LED, and generates little heat. A radiator is not needed, so a lamp is light. The filament solves a disadvantage that a conventional LED terminal lighting product needs the radiator so a lamp is very heavy. The LED light source is flexible, and can deform and cut arbitrarily. The filament provides favorable conditions for diversification and irritation angle development of terminal light source products.

Description

Flexible LED filament of light source

Technical field

The utility model relates to LED lamp, relates in particular to LED light source filament.

Background technology

Light-emitting diode, is a kind of solid-state semiconductor device that can be visible ray by electric energy conversion, and it can directly be converted into light electricity.The heart of LED is the wafer of a light-emitting diode, and whole wafer is encapsulated on the substrate of arbitrary structures by the mixture of fluorescent material and epoxy resin, and one end is negative pole, and the other end connects the positive pole of power supply.For general lighting, people more need white light source.And white light needs blue wafer to coordinate with yellow fluorescent powder just to reach the needed a series of white lights of people.The LED emitting white light for 1998 succeeds in developing.This LED is packaged together GaN chip and yttrium-aluminium-garnet (YAG) to make, namely P-N knot is packaged together with sapphire, single led power is less, conventionally be less than 1W, therefore to expect high-power LED lamp, several LED need to be carried out to serial or parallel connection, to reach required brightness.As shown in Figure 1, P-N knot 1 is packaged together into single led bulb with sapphire 2 and is fixed on the aluminum substrate 4 of conduction, by gold thread 3, the two ends of P-N knot are electrically connected to aluminium base, gold thread 3 is from the surface process of light-emitting diode, because aluminium base is light tight, so light-emitting diode (P-N knot) is can only one direction luminous, irradiating angle is restricted, generally can only irradiate 120 °, be no more than 140 °, and the light of its another direction of being kept off cannot send, also change into heat, 3 pairs of light-emitting diodes of gold thread are in the light and extinction also makes the light efficiency of light-emitting diode reduce, so the light efficiency of LED can only reach 30% left and right at present, all the other 70% transfer heat energy to.1000/M ²lED energising 10 minutes, more than traditional encapsulating structure LED crystal Nei Wenduda 180 degree, Led crystal outside mean temperature just reaches above (the temperature computation mode: (temperature 180 degree+air themperature 25 degree in LED crystal) ÷ 2=102 degree) of 80 degree, and the above temperature of 80 degree can make LED accelerate light decay, large on its life-span impact.In LED crystal outside mean temperature, reach 100,000 hours theoretical life-spans of the following simple grain LED of 80 degree, light decay is initial 50%, and surpasses 80 degree when LED crystal outside mean temperature, and its life-span is only 30000--50000 hour, and light decay is initial 70%.Therefore on exploitation LED crystal structure, to the structure of heat radiation, consider very important.

Summary of the invention

The purpose of this utility model is to overcome the shortcoming that existing LED lamp exists, and provides a kind of energy double-side, the flexible LED filament of light source that light transmittance efficiency is high.

The technical scheme that the utility model adopts is a kind of flexible LED filament of light source, P-N knot is packaged together into single led wafer with sapphire, mixture by fluorescent material and epoxy resin is fixed on single led wafer on substrate, its design main points are to be designed with the fixing hole of the fixing single led wafer that can hold LED wafer on substrate, fixing hole is two up big and down small sector holes, macropore is counterbore, and aperture is through hole, and the internal diameter of aperture is less than the external diameter of LED wafer.

The utility model is on the basis of existing LED packaging technology, on substrate, increased the fixing hole of LED, since utility model LED white light, all light-emitting diode to be sticked on to substrate be fixed, the utility model looks for another way the fixing method of traditional LED wafer and substrate is improved, by punching, be fixed and not only make fixed position more accurately firmly, also making the luminous LED wafer of original one side become two sides can be luminous, make electric energy major part become luminous energy, reduce electric energy and become heat energy, greatly reduce the heating of LED wafer, improved the light efficiency of LED wafer, light transmittance efficiency reaches more than 60%, only there is substrate thickness direction to have shading phenomenon, because substrate thickness is thinner, in covering after fluorescent material, through reflections from phosphor particles, lighting angle approaches 360 °, can reach the effect of the all-round light of incandescent lamp.Therefore, the fixing hole of described LED wafer also can be described as loophole.

The internal temperature of the LED wafer of encapsulation 1W is reduced to 120 degree by original 180 degree, has extended the useful life of LED wafer, has greatly improved the lumen degree of the mono-wattage of LED, for improving the light efficiency of LED single light source, provides condition.

A plurality of fixing holes are evenly arranged.Can reach the object that improves illumination by increasing the quantity of LED wafer, because so LED light source heating of the present utility model can increase arbitrarily the quantity of LED wafer less in very little volume, can reach as required any shearing or bending, for the research and development of the LED illumination application product in downstream provide huge imagination space and range of application.

On substrate, be designed with conductive trough, the center line of conductive trough overlaps with the center line of the fixing hole of LED wafer, and downwards, sapphire is upwards fixed in fixing hole single led wafer P-N knot, the internal diameter of aperture is less than the external diameter of P-N knot in LED wafer, and both positive and negative polarity and the conductive trough of P-N knot join.

Compare with the fixed form of existing LED wafer, the anti-dress of the utility model LED wafer, this is also emphasis of the present utility model, upwards, the good heat dissipation effect to sapphire surface, can effectively reduce below bulk temperature 60 degree sapphire.By be shaped with conductive trough on substrate, make LED wafer directly by substrate, carry out conducting, cancel and use gold thread to connect, save cost and improved again light efficiency, make the light transmittance efficiency of LED light source reach 80%.On circuit, do secondary heat conduction, realized that LED light source passes soon, leads soon, loose principle soon, also greatly improved the lumen degree of the mono-wattage of LED, for improving the light efficiency of LED single light source, provide condition.

Substrate is that thickness is the copper coin of 0.01-1mm, and electroplate forms, and surface etch goes out conductive trough.Sheet copper has good pliability and conductivity, and it is convenient to shear, and the flexible LED filament of light source of therefore making can be sheared as required or be out of shape, and the light that electroplate sends LED wafer has reflex, can increase light efficiency.

The width of substrate is 0.08-5mm.

Substrate is that thickness is the transparent panel of 0.01-1mm, and surface is shaped with elongated slot, is fixed with conducting strip and forms conductive trough in groove.Because substrate is that the light that transparent panel sends LED wafer has no to stop, can make the light efficiency of the light that LED wafer sends reach the strongest.

The beneficial effects of the utility model: solved the luminous drawback of LED one side, improve light efficiency, reduce temperature, extend the LED life-span, heating is few, without radiator, makes light fixture light, solved the very heavy defect of traditional LED terminal illumination product because needing radiator that light fixture is become, LED light source is soft, can random variation, cutting, and for the diversification of terminal light source product, large lighting angle exploitation provide favourable condition.

Accompanying drawing explanation

The structural representation of the existing LED light source of Fig. 1

Fig. 2 structural representation of the present utility model

Fig. 3 is the structural representation of the utility model embodiment 2

Fig. 4 is the structural representation of substrate

Wherein: 1P-N ties 2 sapphire 3 gold thread 4 substrate 41 conductive trough 42 aperture 43 macropores.

Embodiment

Below in conjunction with accompanying drawing, the utility model is described in further detail, can makes professional and technical personnel more understand the utility model, following embodiment is modified, it is all possible adding and replacing, and does not all exceed protection range of the present utility model.

Embodiment 1, and as shown in Figure 2, a kind of flexible LED filament of light source, is to improve on the basis of existing LED light source, and the substrate of fixed L ED wafer is got to through hole, and LED wafer is put into hole, realizes lighting at two sides.Particularly: P-N knot 1 is packaged together into single led wafer with sapphire 2, mixture by fluorescent material and epoxy resin is fixed on single led wafer on substrate 4, by gold thread 3, the two ends of P-N knot are electrically connected to substrate 4, two ends and the distance between substrate 4 of P-N knot are also little than existing distance, can save gold thread 3 consumptions, on substrate 4, be designed with the fixing hole of the fixing single led wafer that can hold LED wafer, fixing hole is two up big and down small sector holes, macropore 43 is counterbore, aperture 42 is through hole, the internal diameter of aperture 42 is less than the external diameter of LED wafer, aperture 42 can appear sapphire 2 direction light, making the luminous LED wafer of original one side become two sides can be luminous, make electric energy major part become luminous energy, improved the light efficiency of LED wafer, light transmittance efficiency reaches more than 60%, lighting angle approaches 360 °, can reach the effect of the all-round light of incandescent lamp.It is same as the prior art that all the other do not state part.

Embodiment 2, as shown in Figure 3,4, be on 1 basis, to improve implementing, substrate 4 for thickness be 0.01-1mm, width is the copper coin of 0.08-5mm, electroplate forms, and surface etch goes out conductive trough 41, and the center line of conductive trough 41 overlaps with the center line of the fixing hole of LED wafer, a plurality of fixing holes are evenly arranged, the in-built LED wafer of each fixing hole, can brightness as required carry out cutting during use, selects the LED wafer of varying number.The internal diameter of aperture 42 is less than the external diameter of the knot of P-N in LED wafer 1, and it is 1 downward that the P-N of single led wafer ties, and sapphire 2 is upwards fixed in fixing hole, and both positive and negative polarity and the conductive trough 41 of P-N knot 1 join, and by conductive trough 41, are electrically connected to.

Embodiment 3, implementing to select on 2 basis thickness, are that the transparent panel of 0.01-1mm is substrate 4, and surface is shaped with elongated slot, be fixed with conducting strip and form conductive trough 41 in groove, and luminous also unobstructed to LED wafer of substrate, can make light efficiency maximization like this.It is identical with upper example that all the other do not state part.

Claims

1. a flexible LED filament of light source, P-N knot (1) is fixed together into single led wafer with sapphire (2), mixture by fluorescent material and epoxy resin is fixed on single led wafer on substrate (4), it is characterized in that: the fixing hole that is designed with the fixing single led wafer that can hold LED wafer on substrate (4), fixing hole is two up big and down small sector holes, macropore (43) is counterbore, and aperture (42) is through hole, and the internal diameter of aperture (42) is less than the external diameter of LED wafer.

2. according to a kind of flexible LED filament of light source described in claims 1, it is characterized in that: a plurality of fixing holes are evenly arranged.

3. according to a kind of flexible LED filament of light source described in claims 1, it is characterized in that: on substrate (4), be designed with conductive trough (41), the center line of conductive trough (41) overlaps with the center line of the fixing hole of LED wafer, single led wafer P-N knot (1) is downward, sapphire (2) is upwards fixed in fixing hole, the internal diameter of aperture (42) is less than the external diameter of P-N knot (1) in LED wafer, and both positive and negative polarity and the conductive trough (41) of P-N knot (1) join.

4. according to a kind of flexible LED filament of light source described in claims 1, it is characterized in that: the copper coin that substrate (4) is 0.01-1mm for thickness, electroplate forms, and surface etch goes out conductive trough (41).

5. according to a kind of flexible LED filament of light source described in claims 1, it is characterized in that: the width of substrate (4) is 0.08-5mm.

6. according to a kind of flexible LED filament of light source described in claims 1, it is characterized in that: the transparent panel that substrate (4) is 0.01-1mm for thickness, surface is shaped with elongated slot, is fixed with conducting strip and forms conductive trough (41) in groove.