Source: https://patents.google.com/patent/CN107946441A/en
Timestamp: 2020-08-05 23:20:19
Document Index: 453182048

Matched Legal Cases: ['art\n200', 'art 32', 'art 32', 'art 32', 'art 30', 'art 32', 'art 32', 'art 32', 'art 32', 'art 32']

CN107946441A - Light-emitting device and light-emitting diode encapsulation structure - Google Patents
Light-emitting device and light-emitting diode encapsulation structure Download PDF
CN107946441A
CN107946441A CN201710879687.4A CN201710879687A CN107946441A CN 107946441 A CN107946441 A CN 107946441A CN 201710879687 A CN201710879687 A CN 201710879687A CN 107946441 A CN107946441 A CN 107946441A
CN201710879687.4A
曾德玮
2016-10-12 Priority to US201662407484P priority Critical
2016-10-12 Priority to US62/407,484 priority
2017-02-24 Priority to US201762462926P priority
2017-02-24 Priority to US62/462,926 priority
2017-09-26 Application filed by 亿光电子工业股份有限公司 filed Critical 亿光电子工业股份有限公司
2018-04-20 Publication of CN107946441A publication Critical patent/CN107946441A/en
238000005538 encapsulation Methods 0.000 title claims abstract description 26
238000004020 luminiscence type Methods 0.000 claims abstract description 173
239000011248 coating agents Substances 0.000 claims description 62
The present invention provides a kind of light-emitting device, includes substrate, luminescence unit and containment member；Substrate includes electrode pad；Luminescence unit is arranged on substrate, comprising LED chip, is electrically connected with electrode pad；Containment member is arranged on substrate, coats the side of each luminescence unit, and is also included around portion and separating part, and luminescence unit is surrounded around portion, and separating part is arranged between luminescence unit.The present invention separately provides a kind of light-emitting diode encapsulation structure, includes aforesaid base plate, luminescence unit and containment member.Thereby, luminescence unit can produce different color or the light of colour temperature, and then color or the effect of colour temperature adjustment.
Light-emitting device and light-emitting diode encapsulation structure
The present invention relates to a kind of light-emitting device and light-emitting diode encapsulation structure, more particularly to one kind to include multiple luminous lists The light-emitting device and light-emitting diode encapsulation structure of member.
To enable light-emitting device to produce multiple color or the light of colour temperature, showed with providing more rich or various light, Traditional practice is that more than two LED chips are arranged on a substrate, then coats LED chip and substrate with encapsulating material. Such LED chip can send the light of different colours in itself, or coordinate fluorescent powder and produce the light of different colours.However, If such LED chip does not configure properly on substrate, easily lead to the light that some LED chip is sent and be irradiated to another Fluorescent powder on or near LED chip, produces unexpected light, so influence the light that light-emitting device is presented color or Colour temperature.
On the other hand, there is the light-emitting device of multiple LED chips in tradition, generally all using thermoset epoxy resin (i.e. Epoxy Molding Compound, EMC) lead frame come the direct such LED chip of die bond, it is, the groove of lead frame Die bond has multiple LED chips at the same time, and routing used in die bond LED chip also needs to occupy certain space, therefore the groove needs It is sufficiently large；In addition, the encapsulation body sidewall of lead frame also need it is thicker.Therefore, traditional light-emitting device has larger volume.Again Person, when light-emitting device includes multiple LED chips, if caused thermal energy, will without properly dissipation when such LED chip operates Influence luminous efficacy and the service life of LED chip.
In view of this, how a light-emitting device and/or light-emitting diode encapsulation structure are provided, to improve above-mentioned missing, For industry problem to be solved.
In view of the above problems, a purpose of the invention is to provide a kind of light-emitting device and light-emitting diode encapsulation structure, It can produce different color or the light of colour temperature, and then color or the effect of colour temperature adjustment.Another object of the present invention exists In the light that the light-emitting device and light-emitting diode encapsulation structure can be launched each luminescence unit does not easily cause other lists that shine Member produces light.A further object of the present invention is that the light-emitting device and light-emitting diode encapsulation structure can send out the confession of substrate The area reduction that light unit is set, in order to the overall volume of reduction.
For the above-mentioned purpose at least one, disclosed light-emitting device include a substrate, multiple luminescence units An and containment member.The substrate includes multiple electrodes connection pad；Such luminescence unit is arranged on the substrate, and such luminescence unit is each Comprising a LED chip, such LED chip is electrically connected with such electrode pad；And the containment member is arranged on the substrate, And the one side of each of the such luminescence unit of cladding, wherein, which includes one around portion and a separating part, the ring Such luminescence unit is surrounded around portion, and the separating part is arranged between such luminescence unit.
It is preferred that in the light-emitting device, each of such luminescence unit respectively includes a fluorescence coating, which is covered in In the LED chip.
It is preferred that in the light-emitting device, the one of which of such luminescence unit includes a fluorescence coating, which is covered in In the LED chip.
It is preferred that in the light-emitting device, which is a fluorescence patch.
It is preferred that in the light-emitting device, which more partly coats the one of the one of which of such luminescence unit Upper surface.
It is preferred that in the light-emitting device, each of such luminescence unit is fitted projects light, such injection light tool to launch one There are wavelength different from each other or colour temperature.
It is preferred that in the light-emitting device, which also includes a reflecting material, so that the containment member is a reflection Component.
It is preferred that in the light-emitting device, the one of which of such electrode pad is to be electrically connected to such LED chip at the same time Each an electrode.
It is preferred that in the light-emitting device, a upper surface of the containment member is higher than or is flush to its of such luminescence unit One upper surface of middle one.
It is preferred that in the light-emitting device, a upper surface of the containment member and the one of the one of which of such luminescence unit The distance between upper surface, no more than the 15% of a thickness of the fluorescence coating.
It is preferred that in the light-emitting device, a thickness of the separating part of the containment member is a height of such LED chip More than half.
It is preferred that in the light-emitting device, the separating part of the containment member includes a convex upper surface, and the circular portion is wrapped Containing a concavity upper surface.
It is preferred that in the light-emitting device, the distance between the convex upper surface and the concavity upper surface, no more than the fluorescence The 15% of one thickness of layer.
It is preferred that in the light-emitting device, also the substrate is arranged at comprising an electrostatic protection element, the electrostatic protection element On, it is electrically connected on such electrode pad, and coated by the containment member.
It is preferred that in the light-emitting device, such luminescence unit wherein the two respectively include a center, and the electrostatic is prevented Protection element also includes a center, each centre bit with the electrostatic protection element in such center of such luminescence unit Put and be more than at a distance of one first distance, such center second distance apart of such luminescence unit, the second distance Or equal to first distance.
It is preferred that in the light-emitting device, such luminescence unit wherein the two respectively include a center, and the electrostatic is prevented Protection element also includes a center, each centre bit with the electrostatic protection element in such center of such luminescence unit Put at a distance of one first distance, such center of such luminescence unit is a second distance apart, first distance and/ Or the second distance is no more than the half of a length of side in the circular portion.
For the above-mentioned purpose at least one, the light-emitting diode encapsulation structure that the present invention separately discloses include：It is one substrate, more A luminescence unit and a containment member.The substrate includes multiple electrodes connection pad；Such luminescence unit, is arranged on the substrate, should One first luminescence unit to one the 4th luminescence unit is included Deng luminescence unit, which respectively includes one LED chip, such LED chip are electrically connected with such electrode pad；And the containment member, it is arranged on the substrate, and wrap The one side of each of first to the 4th luminescence unit is covered, wherein, which includes one and separates around portion and one Portion, which surrounds first to the 4th luminescence unit, and the separating part is arranged at first to the 4th luminescence unit Between.
It is preferred that in the light-emitting diode encapsulation structure, which respectively includes a center Position, the center of first luminescence unit and the center of the 4th luminescence unit be at a distance of one first distance, The center of first luminescence unit with this second or the 3rd luminescence unit the center be at a distance of one second away from From first distance is more than the second distance.
It is preferred that in the light-emitting diode encapsulation structure, which fits projects light to launch a blueness, 4th luminescence unit is fitted projects light to launch a white.
It is preferred that in the light-emitting diode encapsulation structure, be arranged at the first luminescence unit and the 4th luminescence unit it Between the separating part include a reflecting material.
Thereby, light-emitting device of the invention and light-emitting diode encapsulation structure can provide at following beneficial effect：1、 Such luminescence unit can produce the light of few color or colour temperature, reachable by controlling generation opportunity and the mixing of such light The effect adjusted to color or colour temperature；2nd, containment member can be spaced each luminescence unit, so that light caused by each luminescence unit It is difficult to be transferred in other luminescence units and produce unexpected light；3rd, containment member can local complexity luminescence unit upper table Face, is arranged on substrate so that luminescence unit entirety is more firm, or the fluorescence coating of luminescence unit is more securely arranged at LED On chip；4th, such luminescence unit may be connected to same electrode pad, to reduce the area of few electrode pad, and then reduce base The area set for luminescence unit of plate；5th, the first luminescence unit of light is projected and to launch blueness to launch white injection 4th luminescence unit of light, both project light in keeping relatively large distance on substrate, to avoid blueness and cause the 4th to shine Unit produces unexpected light.
For above-mentioned purpose, technical characteristic and advantage can be become apparent, hereafter with preferred embodiment coordinate attached drawing into Row describes in detail.
Fig. 1 is the top view of the light-emitting device according to presently preferred embodiments of the present invention；
Fig. 2 is the sectional view along the AA lines of Fig. 1；
Fig. 3 is the side view of the light-emitting device according to presently preferred embodiments of the present invention, wherein the second luminescence unit does not have Fluorescence coating；
Fig. 4 is the side view of the light-emitting device according to presently preferred embodiments of the present invention, wherein containment member local complexity the One and second luminescence unit upper surface；
Fig. 5 is the side view of the light-emitting device according to presently preferred embodiments of the present invention, and wherein separating part is convex upper surface, And it is concavity upper surface around portion；
Fig. 6 A are the top view according to the light-emitting device of another preferred embodiment of the present invention；
Fig. 6 B are another top view according to the light-emitting device of another preferred embodiment of the present invention；
Fig. 7 is the top view according to the light-emitting diode encapsulation structure of the another embodiment of the present invention；And
Fig. 8 is the stereogram according to the light-emitting diode encapsulation structure of the another embodiment of the present invention.
1st, 1 ' light-emitting device
2 light-emitting diode encapsulation structure
10th, 10 " substrate
11st, 12,110,111,112,113 electrode pad
13 conduction columns
20th, 20 " luminescence unit
21st, 21 " luminescence units, the first luminescence unit
22nd, 22 " luminescence units, the second luminescence unit
23 " luminescence units, the 3rd luminescence unit
24 " luminescence units, the 4th luminescence unit
23rd, 23 ', 230 side
24th, 201,34 upper surface
30th, 30 " containment member
31st, 31 " around portion
32nd, 32 " separating part
200th, 200 " LED chip
210th, 210 " LED chips, the first LED chip
220th, 220 " LED chips, the second LED chip
230 " LED chips, the 3rd LED chip
240 " LED chips, the 4th LED chip
341 concavity upper surfaces
342 convex upper surfaces
400th, 400 " fluorescence coating
410 fluorescence coatings, the first fluorescence coating
420 fluorescence coatings, the second fluorescence coating
500 electrostatic protection elements
600 conducting wires
X1, X2, X3, X1 ", X2 ", X3 ", X4 " centers
The first distance of T1, T1 "
T2, T2 " second distance
The L length of sides
Please refer to Fig.1 and Fig. 2 shown in, its be according to the present invention the 1st preferred embodiment light-emitting device 1 top view and Sectional view.Light-emitting device 1 can include a substrate 10,20 and one containment member 30 of multiple luminescence units, in the technology of those elements Appearance is sequentially described as follows.
Substrate 10 can be ceramic substrate, printed circuit board (PCB) or conductive metal frames etc., and the present embodiment is by taking ceramic substrate as an example.Base Plate 10 can include multiple electrodes connection pad 11, be arranged at a upper surface of substrate 10, therefore can be described as top electrode connection pad.In this implementation Example, the number of electrode pad 11 is exemplified by three, and for convenience of description, each electrode pad 11 further marked as 111~ 113.Substrate 10 can also include multiple electrodes connection pad 12 and conduction column 13, and such electrode pad 12 is arranged at the lower surface of substrate 10 (therefore can be described as bottom electrode connection pad), and such conduction column 13 is arranged between the upper surface and the lower surface of substrate 10, and contact electricity Pole connection pad 11,12, so that electrode pad 11,12 phases electrically conduct.The number of electrode pad 12 can be three, be connect with counter electrode The number of pad 11；(not shown) in other embodiments, the number of electrode pad 12 can be for two (compared with the number of electrode pad 11 Mesh reduces one), and one of electrode pad 12 electrically conducts with two electrode pads 11, another electrode pad 12 and one A electrode pad 11 electrically conducts.In addition, electrode pad 11 may extend to the side of substrate 10 and expose (not shown), it is electric at this time Pole connection pad 12 and conduction column 13 can omit setting.
Luminescence unit 20 is arranged on substrate 10, and its number is exemplified by two, be referred to as the first luminescence unit 21 and Second luminescence unit 22.Each luminescence unit 21,22 includes a LED chip 200, is referred to as the first LED chip 210 and Two LED chips 220.LED chip 210,220 can be horizontal chip, rectilinear chip or cover formula chip, in the present embodiment, Both are all to cover formula chip.The color that LED chip 210,220 is sent may be the same or different, such as be all blue light, its main peak Wavelength is between 420nm to 490nm.
In order to reduce the setting of packaging body volume and electrode, and the mesh of independent regulation and control LED chip can be reached at the same time , two electrodes (cathode and anode) of the first LED chip 210 are respectively and electrically connected to the electrode pad 111 and 112 of substrate 10, And two electrodes (anode and cathode) of the second LED chip 220 are electrically connected to electrode pad 112 and 113；It is professed, is arranged at Middle electrode pad 112 is electrically connected to the anode of LED chip 210,220 at the same time, forms the electric connection mode of common-anode, So, it is only necessary to which three electrode pads 111~113 can be electrically connected two LED chips 210,220 at the same time, use diminution substrate Area needed for 10 upper surface.In other embodiment, two LED chips 210,220 can also adopt the connection mode of common cathode； Alternatively, two LED chips 210,220 can be electrically independent each other, without the number of common-anode or common cathode, at this time electrode pad 11 It can be four.Obtain it is noted that the electrode of the common-anode either common cathode is set, in order to consider the contracting of the volume of packaging body Subtract, therefore the electrode pad 112 of the common-anode either common cathode will be built in the central part of packaging body, and it connects in electrode Pad 111 and 113 both sides for being relatively arranged on common-anode either common cathode electrode pad 112 respectively.
Each luminescence unit 21,22 also includes a fluorescence coating 400, is referred to as the first fluorescence coating 410 and the second fluorescence Layer 420.First fluorescence coating 410 is covered in the first LED chip 210, and the second fluorescence coating 420 is covered in the second LED chip 220 On.First and second fluorescence coating 410,420 can have different wavelength convert effects, it is, fluorescence coating 410,420 has not Same fluorescent powder composition or different phosphor concentrations, so that the injection light color temperature of first and second luminescence unit 21,22 is different. For example, the injection light of the first luminescence unit 21 is preferably the white light that color temperature is about 2600K to 3200K, and second is luminous single The injection light of member 22 is preferably the white light that color temperature is about 5500K to 6500K
In other embodiments, as shown in figure 3, only the first luminescence unit 21 includes fluorescence coating 400, and second shines Unit 22 only includes the second LED chip 220.Therefore, the light emitted by the first luminescence unit 21 is by the first LED chip 210 The light that light mixing fluorescence coating 400 is changed forms, and the light emitted by the second luminescence unit 22 is for the first LED chip 210 light, therefore both colors are different.For example, just color temperature about 5500K is extremely for the injection of the first luminescence unit 21 The white light (cool white light) of 6500K, blue light (its main peak that the injection light of the second luminescence unit 22 is sent by the second LED chip 220 Wavelength is about 420nm to 490nm), green light, yellow light, tangerine light or feux rouges (its peak wavelength is about 625nm).
Referring back to Fig. 1 and Fig. 2, fluorescence coating 400 can include a base material (Matrix) and fluorescent material, and base material can be ceramics Material or resin material, ceramic material is preferably silica, and resin material is preferably epoxy resin or silica resin.Fluorescence Material can be used selected from by one or more of following formed group：(Sr,Ba)Si2(O,Cl)2N2:Eu2+、Sr5(PO4)3Cl:Eu2+、(Sr,Ba)MgAl10O17:Eu2+、(Sr,Ba)3MgSi2O8:Eu2+、SrAl2O4:Eu2+、SrBaSiO4:Eu2+、CdS: In、CaS:Ce3+、(Y,Lu,Gd)3(Al,Ga)5O12:Ce3+、Ca3Sc2Si3O12:Ce3+、SrSiON:Eu2+、ZnS:Al3+,Cu+、 CaS:Sn2+、CaS:Sn2+,F、CaSO4:Ce3+,Mn2+、LiAlO2:Mn2+、BaMgAl10O17:Eu2+,Mn2+、ZnS:Cu+,Cl-、 Ca3WO6:U、Ca3SiO4Cl2:Eu2+、SrxBayClzAl2O4-z/2:Ce3+,Mn2+(X:0.2、Y:0.7、Z:1.1)、Ba2MgSi2O7: Eu2+、Ba2SiO4:Eu2+、Ba2Li2Si2O7:Eu2+、ZnO:S、ZnO:Zn、Ca2Ba3(PO4)3Cl:Eu2+、BaAl2O4:Eu2+、 SrGa2S4:Eu2+、ZnS:Eu2+、Ba5(PO4)3Cl:U、Sr3WO6:U、CaGa2S4:Eu2+、SrSO4:Eu2+,Mn2+、ZnS:P、ZnS: P3-,Cl-、ZnS:Mn2+、CaS:Yb2+,Cl、Gd3Ga4O12:Cr3+、CaGa2S4:Mn2+、Na(Mg,Mn)2LiSi4O10F2:Mn、 ZnS:Sn2+、Y3Al5O12:Cr3+、SrB8O13:Sm2+、MgSr3Si2O8:Eu2+,Mn2+、α-SrO·3B2O3:Sm2+、ZnS-CdS、 ZnSe:Cu+,Cl、ZnGa2S4:Mn2+、ZnO:Bi3+、BaS:Au,K、ZnS:Pb2+、ZnS:Sn2+,Li+、ZnS:Pb,Cu、 CaTiO3:Pr3+、CaTiO3:Eu3+、Y2O3:Eu3+、(Y,Gd)2O3:Eu3+、CaS:Pb2+,Mn2+、YPO4:Eu3+、Ca2MgSi2O7: Eu2+,Mn2+、Y(P,V)O4:Eu3+、Y2O2S:Eu3+、SrAl4O7:Eu3+、CaYAlO4:Eu3+、LaO2S:Eu3+、LiW2O8:Eu3+, Sm3+、(Sr,Ca,Ba,Mg)10(PO4)6Cl2:Eu2+,Mn2+、Ba3MgSi2O8:Eu2+,Mn2+、ZnS:Mn2+,Te2+、Mg2TiO4: Mn4+、K2SiF6:Mn4+、SrS:Eu2+、Na1.23K0.42Eu0.12TiSi4O11、Na1.23K0.42Eu0.12TiSi5O13:Eu3+、CdS:In, Te、(Sr,Ca)AlSiN3:Eu2+、CaSiN3:Eu2+、(Ca,Sr)2Si5N8:Eu2+And Eu2W2O7。
In addition, fluorescence coating 400 can include the above-mentioned fluorescent material of different proportion.For example, the first fluorescence coating 410 includes difference The one first yellow-green fluorescence material and one first red fluorescent material of ratio, in terms of the base material of 100 parts by weight, the first yellow green Fluorescent material is about 90 to 120 parts by weight, about 5 to 15 parts by weight of parts by weight of the first red fluorescent material；Second fluorescence coating 420 Comprising one second yellow-green fluorescence material and one second red fluorescent material, in terms of the base material of 100 parts by weight, the second yellow green is glimmering Stimulative substance is about 20 to 60 parts by weight, about 1 to 10 parts by weight of parts by weight of the second red fluorescent material.Again in some embodiments In, the first fluorescence coating 410 includes the first yellow-green fluorescence material and one first red fluorescent material, with the base material of 100 parts by weight Meter, the first yellow-green fluorescence thing are about 20 to 60 parts by weight, about 1 to 10 parts by weight of parts by weight of the first red fluorescent material；The Two fluorescence coatings 420 only include a blue fluorescent substance, and in terms of the base material of 100 parts by weight, blue colour fluorescent powder is about 1 to 20 weight Part.
The mode that fluorescence coating 400 can adopt fluorescence patch provides, to cover LED chip 200, however, it is also possible to adopt spraying, net The modes such as version printing, dispensing, lamination, molding are in directly forming fluorescence coating 400 in LED chip 200.
In the case where providing fluorescence coating 400 using fluorescence patch, the fluorescent material of fluorescence patch can be in fluorescence patch In be in various concentrations distribution.It is professed, when fluorescence patch is formed in a manner of molding, fluorescence patch has more highly concentrated in its side The fluorescent material of degree so that the side more flat smooth, and have the fluorescent material of low concentration in opposite opposite side so that should Side is more coarse.Therefore, (the i.e. low concentration side when the high concentration side of fluorescence patch is covered on the upper surface 201 of LED chip 200 Outwardly), rough surface can reduce the reflection of light, lift the light extraction efficiency of light-emitting device 1；Opposite, if fluorescence patch is low When concentration side is covered on the upper surface 201 of LED chip 200 (i.e. high concentration side outwardly), then the appearance of light-emitting device 1 can more be put down It is whole.
In addition, the external form of fluorescence patch can change with the shape of the upper surface 201 of LED chip 200, such as work as LED When the upper surface 201 of chip 200 is square type, then the fluorescence patch of square type is equally selected.Meanwhile in order to increase fluorescence patch and hair Combination between the containment member 30 of electro-optical device 1, the lateral surface of fluorescence patch can form differing tilt angles, increase fluorescence patch Stationarity.
The luminescence unit 20 that fluorescence coating 400 is formed with LED chip 200, which is set to substrate 10, can some modes, such as first Fluorescence coating 400 is covered in after forming luminescence unit 20 in LED chip 200, placement (pick up and are picked up with single Place mode), or in a manner of batch transfers, luminescence unit 20 is arranged on substrate 10.Alternatively, can be in substrate 10 On gradually form luminescence unit 20, such as first by multiple 200 die bonds of LED chip after substrate 10, then pick up placement with single Mode fluorescence coating 400 is covered in LED chip 200 partially or in whole.In addition, fluorescence coating 400 is being placed in LED chip When on 200, can prior to providing a transparent colloid (not shown) in LED chip 200, transparent colloid can by a processing procedure for dispensing glue come It is formed in LED chip 200；Afterwards, fluorescence coating 400 is positioned in LED chip 200, to be fixed.Transparent colloid is at least It is covered in the whole upper surface 201 of LED chip 200 or the side of at least a part of LED chip 200.It is preferred that each shine The upper surface 24 (i.e. the upper surface of fluorescence coating 400) of unit 20 can be to flush.
Containment member 30 is suitable to seal around luminescence unit 20 and other inner parts point (such as electrode pad 11), with to External force resistance destroys and reduces influence of the environment to those elements.In detail, containment member 30 is arranged on substrate 10, and is coated each The side 23 of luminescence unit 20, or even the upper surface of cladding substrate 10 and electrode pad 11；Electrode pad 12 is not wrapped by.It is close Component 30 is sealed to be arranged between first and second luminescence unit 21,22 around 31 and one separating part 32 of portion, separating part 32 comprising one, And both facing sides 23 (i.e. medial surface) of first and second luminescence unit 21,22 are coated, or can say, first and second hair Light unit 21,22 is separated by separating part 32；Around portion 31 around the not facing sides of both first and second luminescence units 21,22 Face 23 ' (i.e. lateral surface).Containment member 30 can be formed by processing procedures such as dispensing, pressing mold or sprayings.
Containment member 30 preferably includes reflecting material, such as titanium dioxide, boron nitride or zirconium oxide etc. so that sealing structure Part 30 can be used as a reflecting member；At this time, containment member 30 preferably completely coats the side 23,23 ' of luminescence unit 20.Such as This, the light of the first luminescence unit 21 is difficult to arrive at the second luminescence unit 22 through containment member 30, therefore the second fluorescence coating 420 Light will not be inspired, vice versa, avoids the problem that luminescence unit 20 is interfering with each other.Therefore, when control first is luminous single When member 21 shines, the second luminescence unit 22 will not be excited and produce unexpected light.
In order to further avoid the light interference phenomenon between luminescence unit 21,22, the thickness (i.e. of separating part 32 Beeline between the side 23 of one luminescence unit, 21 to the second luminescence unit 22) it is preferably at least the height of LED chip 200 More than half of degree, but it is no more than the lateral surface (side 23 ') of LED chip 200 to the lateral surface (containment member of light-emitting device 1 30 lateral surface) between beeline, the concentration of the reflecting material in the presence of such separating part 32 shines with reflecting enough The light of unit 21,22 is to outside, the phenomenon interfered with each other without producing luminescence unit 21,22.In one embodiment, separate The thickness in portion 32 is 160 μm.
On the other hand, refer to shown in Fig. 4, containment member 30 preferably can be slightly higher than fluorescence coating 400, and containment member 30 The upper surface 24 (i.e. the upper surface of fluorescence coating 400) of luminescence unit 21,22 is partly coated, and reaches fixed effect.Also Be, in addition to side 23,23 ', containment member 30 can coat upper surface 24 at least periphery place so that fluorescence coating 400 be heated and During expansion, the phenomenon of LED chip 200 is caused a departure from.In addition, to avoid influencing the luminous light type of light-emitting device 1, containment member The distance between 30 upper surface 34 and the upper surface 24 of luminescence unit 20 (i.e. difference in height), are not more than and preferably less than glimmering The 15% of 400 thickness of photosphere, in this way, containment member 30 can produce the effect to fluorescence patch (fluorescence coating 400) engaging at the same time, But luminous light type is not interfered with.
Refer to shown in Fig. 5, the upper surface 34 of containment member 30 is preferably formed as a convex or concave crescent Structure, in detail, the upper surface of separating part 32 can form a convex upper surface 341, and can form one around the upper surface in portion 31 Concavity upper surface 342；Difference in height between the peak of convex upper surface 341 and the minimum point of concavity upper surface 342, preferably No more than the 15% of the thickness of fluorescence coating 400, can enable also avoid interference light type outside the fixed fluorescence coating 400 of containment member 30.
It please join Fig. 2 again, the upper surface 34 of containment member 30 can also be with the upper surface 24 of first and second luminescence unit 21,22 Flush, i.e. copline.Fig. 3 please be read again again, containment member 30 can completely coat the upper surface of first and second luminescence unit 21,22 24 and side 23,23 ', and part of the containment member 30 on less than upper surface 24 can be printing opacity person (not including reflecting material), So that light caused by luminescence unit 21,22 may pass through containment member 30.
Ginseng Fig. 1, light-emitting device 1 one or more electrostatic protection elements 500 please can be more included again, it is arranged on substrate 10. By taking two electrostatic protection elements 500 as an example, it corresponds respectively to the first luminescence unit 21 and the second luminescence unit 22；One of them Electrostatic protection element 500 is electrically connected with electrode pad 111 and 112, to be in parallel with the first luminescence unit 21, another electrostatic Protective element 500 is electrically connected with electrode pad 113 and 112, to be in parallel with the second luminescence unit 22, in order to luminous single to provide The electrostatic protection of member 21 and 22.Electrostatic protection element 500 can be coated by the circular portion 31 of containment member 30, it is, shining In the processing procedure of device 1, electrostatic protection element 500 is first arranged on substrate 10, and subsequent containment member 30 completely coats electrostatic protection Element 500, makes electrostatic protection element 500 not be exposed to outside light-emitting device 1.Electrostatic protection element 500 can be Zener diode (Zener diode), is further selected from one of following formed group：Varistor (Varistor), multilayer varistor (MLV), polymer ESD suppressors (PESD) and Transient Voltage Suppressor (TVS).
The technology contents of light-emitting device 1 will be further illustrated with several real examples below.
Example 1 (please refer to Fig. 1 and Fig. 2)：
First, first and second fluorescence coating 410,420 is formed.It is, it is mixed into the silica resin of 100 parts by weight The Y of 105 parts by weight3(Al,Ga)5O12:Ce3+And 14 parts by weight (Sr, Ca) AlSiN3:Eu2+；Then by it in 130 DEG C of lower dies Modeling 5 minutes, is then carried out multistage baking and (such as is toasted 60 minutes with 80 DEG C, then toasted 60 minutes with 120 DEG C, then with 180 DEG C of bakings It is 120 minutes roasting), you can form the first fluorescence coating 410 of the fluorescence patch kenel that a thickness is about 160 μm.Re-cover identical molding Condition, forms the second fluorescence coating 420 of the fluorescence patch kenel of about 160 μm of a thickness, only in the silica resin of 100 parts by weight It is mixed into the Y of 36 parts by weight3(Al,Ga)5O12:Ce3+And 4 parts by weight (Sr, Ca) AlSiN3:Eu2+。
Then, there is provided a substrate 10, and two identical wavelength are provided and cover formula blue chip for 450nm, as First and second LED chip 210,220, and in a manner of being directly bonded to (Direct bonding) die bond on substrate 10.Connect The electrostatic protection element 500 that two Zener diodes are provided, die bond is in the electrode pad 111,113 of upper and lower both sides, and by leading Line is electrically connected with middle electrode pad 112.
Thereafter, the low concentration side of the first fluorescence coating 410 is covered on the first LED chip 210, forms the first luminescence unit 21； The low concentration side of second fluorescence paste layer 420 is covered in the second LED chip 220, forms the second luminescence unit 22.In this way, the One and second fluorescence coating 410,420 be all the form of high concentration side upward, and its upper surface is substantially contour (flushing).Afterwards, The silica resin composition with reflecting material is inserted the by (temperature is 130 DEG C, and molding cycle is 5 minutes) in a manner of molding One and second between LED chip 210 and 220, to form the containment member 30 with reflecting material.Containment member 30 is completely covered Electrostatic protection element 500, and higher than about 20 μm of the upper surface of first and second fluorescence coating 410,420；This difference in height is about first And second fluorescence coating 410,420 thickness 12.5%.Then, multi-stage baking is carried out to containment member 30 (such as with 80 DEG C Baking 60 minutes, then toasted 60 minutes with 120 DEG C, then toasted 120 minutes with 180 DEG C), so that it cures.Finally, diamond is utilized The modes such as cutter come cutting sealing component 30 and substrate 10, form single granulated light-emitting device 1.Light-emitting device 1 after striking, One luminescence unit 21 is the white light for sending colour temperature about 2700K, and the second luminescence unit 22 is the white light for sending colour temperature about 5800K.
Example 2 (please refer to Fig. 1 and Fig. 2)：
The operating parameter of example 1 is re-covered, only the fluorescent material composition in fluorescence coating 400 and concentration are different, i.e., glimmering first In photosphere 410, the Y of 36 parts by weight is mixed into the silica resin of 100 parts by weight3(Al,Ga)5O12:Ce3+And 4 parts by weight (Sr,Ca)AlSiN3:Eu2+, and in the second fluorescence coating 420,9 parts by weight are mixed into the silica resin of 100 parts by weight BaSi2(O,Cl)2N2:Eu2+.Single granulated light-emitting device 1 is ultimately formed after the step of re-covering embodiment 1, and it is being lighted Afterwards, the first luminescence unit 21 can send the white light of colour temperature about 5800K, and it is 450nm that the second luminescence unit 22, which can send peak wavelength, The blue light gone out mixed by (light of the second LED chip 220) and 470nm (light that the second fluorescence coating 420 is inspired).
In above-mentioned two example, the upper surface of fluorescence coating 400 may be covered excessively by the resin of containment member 30, cause to send out The luminous efficiency of light unit 20 declines.To improve this problem, before cutter cutting is carried out, using solvent by excessive tree Fat cleans (removal).
Refer to shown in Fig. 6 A and Fig. 6 B, it bows for two of the light-emitting device 1 ' according to the 2nd preferred embodiment of the invention View and sectional view.Light-emitting device 1 ' has similar composition to light-emitting device 1, therefore both technology contents can be cross-referenced. First and second luminescence unit 21,22 of light-emitting device 1 ' can adopt common-anode (or common cathode) side with the electric connection of substrate 10 Formula；First luminescence unit 21 includes a LED chip 210 and a fluorescence coating 400 (as shown in Figure 3), and LED chip 210 can be main peak Wavelength is that 450nm (blue light) covers formula chip, its two electrode can die bond in the left side and middle electrode pad 111,112 On；Fluorescence coating 400 includes the silica resin of 100 parts by weight and the Y of 150 parts by weight3Al5O12:Ce3+, the first luminescence unit 21 is whole Body can send the white light of colour temperature about 5800K.Second luminescence unit 22 includes a LED chip 220 (as shown in Figure 3), it can main peak Wavelength for 625nm (feux rouges) and anode downward, the rectilinear chip of cathode upward, its anode die bond is in middle electrode pad On 112, and utilize the electrode pad 113 on the electric connection of conducting wire 600 the right.
Light-emitting device 1 ' only includes an electrostatic protection element 500, it can be Zener diode, and itself includes multiple P- N junctions, such P-N junctions have shared anode, but have respective cathode.Electrostatic protection element 500 is arranged at substrate 10 On, its shared anode on middle electrode pad 112 with being electrically connected, and its respective cathode then passes through conducting wire 600 and two The electrode pad 111,113 of side is electrically connected；Thus, it is only required to an electrostatic protection element 500 can be electrically connected luminescence unit 21st, 22, the number of element is efficiently reduced, and can reach the purpose of protection luminescence unit 21,22.In addition, electrostatic protection element 500 preferably at the opposite side of luminescence unit 21,22, and interval (the i.e. separating part between corresponding luminescence unit 21,22 32), to avoid conducting wire 600 is got too close to and causes luminescence unit 22 and the short circuit of electrostatic protection element 500.
Furthermore as shown in Figure 6B, first and second luminescence unit 21,22 is respectively comprising center an X1 and X2 (on i.e. The centre of form on surface), and electrostatic protection element 500 includes a center X3, center X1 and center X3 at a distance of one the One distance T1, center X2 and center X3 are also at a distance of one first distance T1, it is, between center X1 and X3 Distance is the same as the distance between center X2 and X3；Center X1 and X2 second distance T2 apart, preferably Ground, second distance T2 are greater than or equal to the first distance T1 so that the line of each center X1~X3 will form an isoceles triangle Shape or equilateral triangle.In this way, the transmitting light that the first luminescence unit 21 or the second luminescence unit 22 are sent can then be projeced into a water On flat axis.
In addition, the first distance T1 or second distance T2 are preferably no greater than the one of the length of side of 1 any lateral wall of light-emitting device Half, if it is, the length of side around portion 31 is the half that L, the first distance T1 or second distance T2 are not more than length of side L.In this way, can Electrostatic protection element 500 and luminescence unit 21,22 is set relatively closely to be arranged on substrate 10, to reduce the upper surface of substrate 10 Area.
Above is the explanation of the technology contents of light-emitting device 1,1 ', will then illustrate the 3rd preferably implementation according to the present invention The technology contents of the light-emitting diode encapsulation structure 2 of example, it can be with the mutual reference of technology contents of above-mentioned light-emitting device 1,1 '.
Refer to shown in Fig. 7 and Fig. 8, light-emitting diode encapsulation structure 2 can be considered that two light-emitting devices 1, two shine and fill Put 1 ' or light-emitting device 1,1 ' be composed, so it's not limited to that；Light-emitting diode encapsulation structure 2 can include substrate 10 ", Multiple luminescence units 20 " and containment member 30 ", are provided with multiple electrodes connection pad 110 (exemplified by eight) on substrate 10 ", respectively It is electrically connected in couples with first to fourth luminescence unit 21 "~24 "；If adopting the mode of common-anode/common cathode, six are only needed Electrode pad 110 can be such that substrate 10 " is electrically connected with such luminescence unit 21 "~24 "；First to fourth luminescence unit 21 " ~24 " respectively include a LED chip, are divided into first to fourth LED chip 210 "~240 ", first and second LED chip 210 ", 220 " can be horizontal chip, and the 3rd and the 4th LED chip 230 ", 240 " can be rectilinear chip；First to fourth LED chip 210 "~240 " can also be to cover formula chip.
The person that sends visible ray (such as blue and green light, tangerine light or Huang can be selected in first to fourth LED chip 210 "~240 " Light etc.), or the person's (such as ultraviolet light or infrared light etc.) that sends black light is selected, and in the present embodiment, first to fourth LED Three brilliant combinations (RGB) of feux rouges, green light and blue-light LED chip are selected in chip 210 "~240 ", and feux rouges, green light, indigo plant also can be selected The brilliant combination (RGBW) of the four of light and White-light LED chip, feux rouges, green light, blue light and tangerine light LED chip four brilliant combinations (RGBO) or Feux rouges, green light, the four of blue light and yellow light LED chip brilliant combinations (RGBY), to obtain the light of high color saturation degree and color rendering.This Outside, by adjusting the electric current of first to fourth LED chip 210 "~240 ", desired white balance and brightness be can reach.
Further illustrated by taking RGBW and RGBY as an example.First to fourth luminescence unit 21 "~24 " can adopt the shape of rectangular array Formula arranges, and the first LED chip 210 " and the 4th LED chip 240 " all select blue-light LED chip, and in the 4th LED chip 240 " Covered with a fluorescence coating 400 "；Second and third LED chip 220 " and 230 " selects feux rouges and green LED chip.Unstressed configuration layer The first to the 3rd luminescence unit 21 "~23 " can launch respectively a blueness project light, it is red project light and green projects light, and 4th luminescence unit 24 ", which can launch a white and project light or yellow, projects light, depending on the fluorescent material of fluorescence coating 400 species and Depending on composition.The powder allotment of the types such as Garnet, Nitride, Silicate, KSF and Sialon can be selected in the fluorescent material The wavelength to be sent；Wherein Garnet can be used the fluorescent powder of such as YAG series, and Y represents Yttrium, but can with Tb, Lu, At least one of the groups such as Gd, La, Sc, Sm element substitutes, and A represents Al, and can be taken with least one of the groups such as Ga, In element Generation；Nitride powder can be CASN or SCASN etc..When forming fluorescence coating 400 ", using corresponding 4th LED chip, 240 " size Shade, the selectivity of fluorescence coating 400 " is sprayed on the top of four LED chip 240 ".
On the other hand, when lighting the first luminescence unit 21 ", the blueness injection light launched may excite the 4th hair The fluorescence coating 400 " of light unit 24 " and produce that white projects light or yellow projects light, cause blue light colour cast.To improve or avoiding this Problem, can by first and the 4th luminescence unit 21 " and 24 " be placed on diagonal positions relatively far away from, with apart from each other one First distance T1 "；It is, first to fourth luminescence unit 21 "~24 " has a center X1 "~X4 " respectively, and in Heart position X1 " and X4 " the first distance T1 ", center X1 " and X2 " apart T2 ", center X1 " away from the second distance And X3 " second distance T2 " apart, first distance T1 " are more than second distance T2 ".
In addition, the containment member 30 " of the first and the 4th luminescence unit 21 ", 24 " of cladding is if light tight or high reflective person, Also above-mentioned blue light colour cast can be improved.Specifically, containment member 30 " includes one around portion 31 " and a separating part 32 ", separates Portion 32 " is arranged between first to fourth luminescence unit 21 "~24 ", and first to fourth luminescence unit 21 "~24 " of cladding is each other Facing each two sides 230, around portion 31 " around first to fourth luminescence unit 21 "~24 "；At least in first and Separating part 32 " can include reflecting material (such as titanium dioxide of the light tight or reflectivity higher than 50% between four luminescence units 21 " Titanium, boron nitride and/or zirconium oxide etc.), as curtain wall structure, to stop that the blueness that the first luminescence unit 21 " is launched is penetrated Light extraction reaches the 4th luminescence unit 24 ".
Another aspect, first to fourth LED chip 210 "~240 " can be corresponding with a free-standing power supply (not shown) respectively Connection, therefore can individually be opened and closed.Then, first to fourth LED chip 210 "~240 " can be lit at the same time or Only partly it is lit, to reach the effect of modulation glow color and colour temperature (2200-3500K).Such power supply can arrange in pairs or groups it is wired or The intelligent lighting regulator control system of wireless mode, to reach desired illumination effect；Wherein, wireless mode may include：It is infrared controlled System, less radio-frequency control, GPRS/CDMA controls, Wi-Fi controls or ZigBee controls etc..
Summary, light-emitting device and light-emitting diode encapsulation structure provided by the present invention can produce different color or color The light of temperature, and then color or the effect of colour temperature adjustment, the light that can be also launched each luminescence unit do not easily cause it He produces light by luminescence unit, or makes the area reduction set for luminescence unit of substrate, in order to the overall volume of reduction.
The above embodiments are only used for enumerating embodiments of the present invention, and the technical characteristic of the explaination present invention, not For limiting the protection category of the present invention.Any skilled person unlabored can change or the arrangement of isotropism belongs to The scope advocated of the present invention, the scope of the present invention should be subject to claim.
1. a kind of light-emitting device, comprising：
Substrate, includes multiple electrodes connection pad；
Multiple luminescence units, are arranged on the substrate, described to wait luminescence unit respectively include LED chip, the LED chip such as described and It is described to wait electrode pad to be electrically connected；And
Containment member, is arranged on the substrate, and coats the side of each of luminescence unit such as described, wherein, it is described close Component is sealed to include around portion and separating part, the circular portion waits luminescence unit around described, and the separating part be arranged at it is described Deng between luminescence unit.
2. light-emitting device according to claim 1, wherein, each for waiting luminescence unit respectively includes a fluorescence coating, The fluorescence coating is covered in the LED chip.
3. light-emitting device according to claim 1, wherein, the one of which for waiting luminescence unit includes fluorescence coating, institute Fluorescence coating is stated to be covered in the LED chip.
4. the light-emitting device according to Claims 2 or 3, wherein, the fluorescence coating is for fluorescence patch.
5. according to the light-emitting device described in claim 1 or 2 or 3, wherein, the containment member more partly coats described wait and sends out The upper surface of the one of which of light unit.
6. according to the light-emitting device described in claim 1 or 2 or 3, wherein, each for waiting luminescence unit is fitted to penetrate Light extraction, it is described to wait injection light that there is wavelength or colour temperature different from each other.
7. according to the light-emitting device described in claim 1 or 2 or 3, wherein, the containment member also includes reflecting material, so that The containment member is reflecting member.
8. according to the light-emitting device described in claim 1 or 2 or 3, wherein, the one of which for waiting electrode pad is electric at the same time Property is connected to the electrode of each of the LED chip such as described.
9. according to the light-emitting device described in claim 1 or 2 or 3, wherein, the upper surface of the containment member is higher than or is flush to The upper surface of the one of which of the luminescence unit such as described.
10. the light-emitting device according to Claims 2 or 3, wherein, the upper surface of the containment member and the luminous list of grade The distance between upper surface of one of which of member, is no more than the 15% of the thickness of the fluorescence coating.
11. according to the light-emitting device described in claim 1 or 2 or 3, wherein, the thickness of the separating part of the containment member For more than half of the height of the LED chip such as described.
12. the light-emitting device according to Claims 2 or 3, wherein, the separating part of the containment member is included in convex Surface, and the circular portion includes concavity upper surface.
13. light-emitting device according to claim 12, wherein, between the convex upper surface and the concavity upper surface Distance, no more than the 15% of the thickness of the fluorescence coating.
14. according to the light-emitting device described in claim 1 or 2 or 3, also comprising electrostatic protection element, the electrostatic protection element It is arranged on the substrate, is electrically connected on the electrode pad such as described, and coated by the containment member.
15. light-emitting device according to claim 14, wherein, it is described wait luminescence unit wherein the two respectively include centre bit Put, and the electrostatic protection element also includes center, the center such as described for waiting luminescence unit respectively with it is described quiet Away from the first distance, the center such as described for waiting luminescence unit is apart for the center of electric protective element Second distance, the second distance are greater than or equal to first distance.
16. light-emitting device according to claim 14, wherein, it is described wait luminescence unit wherein the two respectively include centre bit Put, and the electrostatic protection element also includes center, the center such as described for waiting luminescence unit respectively with it is described quiet Away from the first distance, the center such as described for waiting luminescence unit is apart for the center of electric protective element Second distance, first distance and/or the second distance are not more than the half of the length of side around portion.
17. a kind of light-emitting diode encapsulation structure, comprising：
Multiple luminescence units, are arranged on the substrate, described to wait luminescence unit to include the first luminescence unit to the 4th luminous list Member, described first to the 4th luminescence unit respectively includes LED chip, the LED chip such as described and described waits electrode pad electrical Connection；And
Containment member, is arranged on the substrate, and coats described first to the side of each of the 4th luminescence unit, Wherein, the containment member is included around portion and separating part, the circular portion around described first to the 4th luminescence unit, And the separating part is arranged at described first between the 4th luminescence unit.
18. light-emitting diode encapsulation structure according to claim 17, wherein, described first to the 4th luminescence unit Respectively include center, the center of first luminescence unit and the centre bit of the 4th luminescence unit Put is the center of first luminescence unit and the described second or described 3rd luminescence unit away from the first distance Away from the second distance, first distance is more than the second distance for the center.
19. the light-emitting diode encapsulation structure according to claim 17 or 18, wherein, first luminescence unit is fitted to send out Project blueness and project light, the 4th luminescence unit is fitted projects light to launch white.
20. the light-emitting diode encapsulation structure according to claim 17 or 18, wherein, it is arranged at the first luminescence unit and institute The separating part stated between the 4th luminescence unit includes reflecting material.
CN201710879687.4A 2016-10-12 2017-09-26 Light-emitting device and light-emitting diode encapsulation structure CN107946441A (en)
US201662407484P true 2016-10-12 2016-10-12
US62/407,484 2016-10-12
US201762462926P true 2017-02-24 2017-02-24
US62/462,926 2017-02-24
CN107946441A true CN107946441A (en) 2018-04-20
ID=60080698
CN201710879687.4A CN107946441A (en) 2016-10-12 2017-09-26 Light-emitting device and light-emitting diode encapsulation structure
US (1) US10588184B2 (en)
EP (1) EP3309832A1 (en)
JP (1) JP6692783B2 (en)
KR (1) KR20180040508A (en)
CN (1) CN107946441A (en)
TW (1) TWI662723B (en)
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2017-09-26 CN CN201710879687.4A patent/CN107946441A/en active Search and Examination
2017-10-11 EP EP17195914.1A patent/EP3309832A1/en active Pending
2017-10-11 JP JP2017198060A patent/JP6692783B2/en active Active
2017-10-11 US US15/730,392 patent/US10588184B2/en active Active
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JP6692783B2 (en) 2020-05-13
US20180103513A1 (en) 2018-04-12
US10588184B2 (en) 2020-03-10
TW201814923A (en) 2018-04-16
EP3309832A1 (en) 2018-04-18
JP2018078282A (en) 2018-05-17
KR20180040508A (en) 2018-04-20
TWI662723B (en) 2019-06-11
CN104011457B (en) 2016-08-24 White light source and include the white light source system of described white light source
CN104303298B (en) 2018-01-19 White luminous module
KR100875443B1 (en) 2008-12-23 Light emitting device
CN102403429B (en) 2014-07-16 Light emitting device
CN100543984C (en) 2009-09-23 Light-emitting device