CN110260183A

CN110260183A - Light emitting device

Info

Publication number: CN110260183A
Application number: CN201910547784.2A
Authority: CN
Inventors: 姚久琳; 甘硕杰; 林钧尉; 廖本瑜
Original assignee: Epistar Corp
Current assignee: Epistar Corp
Priority date: 2015-07-23
Filing date: 2015-07-23
Publication date: 2019-09-20
Also published as: CN110260182A; CN110260182B; CN106369367A

Abstract

The present invention discloses a kind of light emitting device, includes a support plate, has a first surface and the second surface and a luminescence unit relative to first surface, and setting on the first surface, can emit beam towards but be not passed through first surface.Light emitting device is in can measure one first brightness on first surface, lower in second surface can measure one second brightness, and the ratio of the first brightness and second brightness is 2~9.

Description

Light emitting device

The application be Chinese invention patent application (application number: 201510438508.4, the applying date: on 07 23rd, 2015, Denomination of invention: light emitting device) divisional application.

Technical field

The present invention relates to a kind of light emitting devices, more particularly, to the light emitting device with optical texture.

Background technique

Light emitting diode (Light-Emitting Diode for solid-state lighting device；LED) there is the low, service life of consuming energy Long, small in size, reaction speed is fastly and optics exports the characteristics such as stable, therefore light emitting diode replaces traditional illumination at leisure Product is simultaneously applied to general home lighting.

In recent years, though the filament that light emitting diode is made gradually is applied in light emitting diode bulb.However, shining Cost, the efficiency of diode filament are still to be improved.Furthermore so that light emitting diode filament is issued the light field of isotropic directivity, and locate Heat dissipation problem is managed, is still the target of development.

Summary of the invention

For above and other objects, features and advantages of the invention can be clearer and more comprehensible, special embodiment below, and match Appended attached drawing is closed, is described as follows.

A kind of light emitting device includes a support plate, with a first surface and one relative to first surface second surface and One luminescence unit, setting on the first surface, can emit beam towards but be not passed through first surface.Light emitting device is in first surface On can measure one first brightness, lower in second surface can measure one second brightness, the first brightness and second brightness Ratio be 2~9.

Detailed description of the invention

Figure 1A is the stereoscopic schematic diagram of a light emitting device in one embodiment of the invention；

Figure 1B is the schematic top plan view of support plate in Figure 1A；

Fig. 1 C is the elevational schematic view of support plate in Figure 1A；

Fig. 1 D is Figure 1A and along the diagrammatic cross-section of Figure 1B I-I line；

Fig. 1 E is the diagrammatic cross-section of Figure 1A；

Fig. 1 F is the enlarged drawing of Fig. 1 E；

Different travel paths of the light that Fig. 2A~Fig. 2 D is respectively issued by luminescence unit in optical texture show It is intended to；

Fig. 2 E is the light distribution curve of light emitting device in one embodiment of the invention；

Fig. 3 A is a diagrammatic cross-section of luminescence unit in one embodiment of the invention；

Fig. 3 B is a diagrammatic cross-section of luminescence unit in another embodiment of the present invention；

Fig. 3 C is a top view of Fig. 3 B；

Fig. 3 D is a diagrammatic cross-section of luminescence unit in another embodiment of the present invention；

Fig. 4 is the stereoscopic schematic diagram of a light bulb in one embodiment of the invention；

Fig. 5 A is the production flow diagram of light emitting device in one embodiment of the invention；

Fig. 5 B~Fig. 5 E is the production process stereoscopic schematic diagram of light emitting device in one embodiment of the invention.

Symbol description

100 light emitting devices

10 optical textures

101 top surfaces

102 side surfaces

103 side bottom surfaces

1031 first parts

1032 second parts

104 bottom surfaces

11 support plates

111 upper surfaces

112 lower surfaces

12,12A, 12B, 12D luminescence unit

The first connection gasket of 120A

The second connection gasket of 120B

121 light emitting hosts

1211 electrodes

122 first transparent bodies

123 phosphor powder layers

124 second transparent bodies

125,125 ' the third transparent body

1251 first parts

The side surface 1251S

1252 second parts

1253 planes

1254 inclined-planes

126 insulating layers

127 extending electrodes

129 catoptric arrangements

13 circuit structures

131 first electrode pads

132 second electrode pads

133,1331,1331A, 1332,1332B conducting wire

134 third electronic pads

135 the 4th electronic pads

151 first perforations

152 second perforations

21 brackets

211 frames

30 light bulbs

301 lamp housings

302 circuit boards

303 support columns

304 radiating pieces

305 electrical connectors

307 electrode pieces

308,309 metal wire

Specific embodiment

Following embodiment will be along with Detailed description of the invention idea of the invention, in attached drawing or explanation, similar or identical portion It point is using identical label, and in the accompanying drawings, the shape or thickness of element can be expanded or shunk.Need it is specifically intended that The element for not being painted or describing in figure can be form known to those skilled in the art.

Figure 1A shows the stereoscopic schematic diagram of a light emitting device 100 in one embodiment of the invention.Figure 1B only shows in Figure 1A and carries The schematic top plan view of plate 11.Fig. 1 C only shows the elevational schematic view of support plate 11 in Figure 1A.Fig. 1 D shows Figure 1A and along Figure 1B I-I The diagrammatic cross-section of line.Fig. 1 E shows Figure 1A along the diagrammatic cross-section in the direction YZ.A~Fig. 1 E referring to Fig.1, light emitting device 100 wrap Containing an optical texture 10, a support plate 11 and multiple luminescence units 12.Support plate 11 has a upper surface 111 and a lower surface 112. One circuit structure 13 is formed on upper surface 111 and has a first electrode pad 131, a second electrode pad 132 and a conductor wire Road 133.Luminescence unit 12 is set in the conducting wire 133 of upper surface 111 and by 133 company of being one another in series of conducting wire It connects.In other embodiments, can by the design of other kind of conducting wire 133 so that luminescence unit 12 be connected in parallel to each other, go here and there and connect, Or it is connected with bridge architecture.In this embodiment, support plate 11 will not penetrate (opaque) by the light that luminescence unit 12 issues, because This, even if luminescence unit 12 emits beam towards upper surface 111, but not through upper surface 111.Support plate 11 can be circuit board. The baseplate material (core layer) of circuit board includes metal, thermoplastic material, thermosetting material or ceramic material.Metal packet Containing the alloys such as aluminium, copper, gold, silver, lamination or single layer.Thermosetting material includes phenolic resin (Phonetic), epoxy resin (Epoxy), bismaleimide-triazine resin (BismaleimideTriazine) or combinations thereof.Thermoplastic material includes poly- Asia Amide resin (Polyimide resin), polytetrafluoroethylene (PTFE) (Polytetrafluorethylene) etc..Ceramic material includes oxygen Change aluminium, aluminium nitride, carbonization sial etc..

As shown in Figure 1A, Figure 1B and Fig. 1 C, a reflecting layer 14 is formed on upper surface 111 and circuit structure 13, and is only revealed It is intended to conducting wire 1331,1332 and the electronic pads 131,132 being electrically connected with luminescence unit 12 out.Conducting wire 1331 and conduction Route 1332 is physically separated each other.In this embodiment, conducting wire 1332A and electronic pads 131 be physically separated each other and Conducting wire 1331B is physically separated each other with electronic pads 132.Each luminescence unit 12 includes one first connection gasket 120A and one Second connection gasket 120B is physical and be electrically connected with the conducting wire 1331,1332 exposed respectively.In the present embodiment, it exposes to the open air Conducting wire 1331,1332 out is rectangle and its long side is parallel with the long side of support plate 11.In another embodiment, it exposes Conducting wire 1331,1332 long side it is parallel with the short side of support plate 11, or with long side folder one between 0~90 ° of angle.Or Person, the conducting wire 1331,1332 exposed can be round, ellipse or polygon.In addition, the setting in reflecting layer 14 can be helped Reflection is helped to increase the luminous efficiency of 100 entirety of light emitting device towards the light of support plate 11 by 12 directive of luminescence unit.

As shown in Fig. 1 C and Fig. 1 D, luminescence unit 12 is not set in lower surface 112.Circuit structure 13 is also comprising third electricity Polar cushion 134 and one the 4th electronic pads 135 are formed in the lower surface 112 of support plate 11.Third electronic pads 134 and the 4th electronic pads 135 The position of corresponding first electrode pad 131 and second electrode pad 132 respectively.One first perforation 151 is through support plate 11 and has one Conductive materials are formed completely or partially in wherein to be electrically connected first electrode pad 131 and third electronic pads 134.One second perforation 152 are formed completely or partially through support plate 11 and with a conductive materials in wherein to be electrically connected second electrode pad 132 and the 4th Electronic pads 135.Implement in benefit one, external power supply (power supply) is separately connected first electrode pad 131 and second electrode Pad 132 is so that multiple luminescence units 12 shine.Third electronic pads 134 and the 4th electronic pads 135 can not be direct with external power supply Physical connection.When electronic pads 131,132 are formed in the way of being welded (butt-joint) with external power supply to be electrically connected, due to needing one The sandwiched support plate 11 of metal clip, the setting of electronic pads 134,135 can help to clamp the firm of light emitting device 100 in manufacturing process Property and provide a conductive path.In one embodiment, when using bonding wire by electronic pads 131,132 and external power supply formation be electrically connected When connecing, third electronic pads 134 and the 4th electronic pads 135 can not be formed.

As shown in Figure 1A and Fig. 1 E, the upper surface 111, lower surface 112 and support plate 11 that optical texture 10 coats support plate 11 are long The side wall 113 of side two sides, but expose electronic pads 131,132,134,135.Optical texture 10 has just like rectangular section. Fig. 1 F is the enlarged drawing of Fig. 1 E.Optical texture 10 has the top surface 101 of an arc；Two are essentially linear and are parallel to each other Side surface 102；Two sides bottom surface 103；And one be essentially plane bottom surface 104, connect two sides bottom surface 103.Push up table Face 101 is located at the top of the upper surface 111 of support plate 11, and bottom surface 104 is located at the lower section of the lower surface 112 of support plate 11.Side table Face 102 extends toward the lower surface of support plate 11 112 along the Z direction from top surface 101.Every side bottom surface 103 includes one first Divide 1031, is extended from side surface 102 with a tilt angle toward bottom surface 104；An and second part 1302.The left and right sides in figure Second part 1302 be respectively connected to first part 1031 and toward the arc-shaped shape of bottom surface 104 extend.The lower surface of support plate 11 112 with the bottom surface 104 of optical texture 10 at a distance of one between 0.3mm~0.7mm first distance D1；The upper surface of support plate 11 111 with the top surface 101 of optical texture 10 at a distance of one between 0.8mm~0.13mm second distance D2.Second distance D2 is greater than First distance D1.The arc of top surface 101 has a radius of curvature between 0.4mm~0.7mm, and has a curved angle θ 1 (central angle corresponding to arc) is between 40 °~60 ° or a radian between 2 π/9~π/3.The second part of side bottom surface 103 Arc have one between 0.2~0.4mm radius of curvature, and have a curved angle θ 2 (central angle corresponding to arc) be situated between In 5 °~20 ° or a radian between π/36~π/9.One spread powder (such as: titanium dioxide, zirconium oxide, zinc oxide or aluminium oxide) It optionally spread in filling optical texture 10 with help, scatter the light that luminescence unit 12 is issued.Spread powder is in optics knot Concentration expressed in percentage by weight (w/w) in structure 10 is between 0.1~0.5% and with one 10nm~100nm or 10~50 μm of particle ruler It is very little.In one embodiment, weight hundred powder concentration of the spread powder in colloid can pass through thermogravimetric analyzer (thermogravimetric analyzer, TGA) is measured.Briefly it, during heating, colloid can gradually be risen due to temperature It is high and be removed after reaching a specific temperature (evaporation or thermal cracking), spread powder is remained, at this time it can be seen that the variation of weight, Therefore colloid and the respective weight of spread powder can be acquired and push away to obtain concentration expressed in percentage by weight of the spread powder in colloid.Alternatively, can be first The total weight of colloid and spread powder is measured, solvent is recycled to remove colloid, finally measures the weight of spread powder, and then acquires expansion Concentration expressed in percentage by weight of the loose powder in colloid.In figure 1A, though visual obtain luminescence unit 12.So, when spread powder is inserted to optics When in structure 10 and reaching a certain concentration, it can make optical texture 10 that white shape be presented and internal luminescence unit can not be regarded to obtain 12。

Optical texture 10 is transparent for the light that sunlight or luminescence unit 12 are issued.Optical texture 10 includes silica gel (Silicone), epoxy resin (Epoxy), polyimide (PI), benzocyclobutene (BCB), cross fluorine cyclobutane (PFCB), SU8, Acrylic resin (Acrylic Resin), polymethyl methacrylate (PMMA), polyethylene terephthalate (PET), poly- carbon Acid esters (PC), polyetherimide (Polyetherimide), fluorocarbon polymer (Fluorocarbon Polymer), aluminium oxide (Al₂O₃), SINR or spin-coating glass (SOG).

Fig. 2A shows the schematic diagram of the light travel path in optical texture 10 issued by luminescence unit 12.It should be noted , the path in attached drawing is only one of many possible paths, and not exclusive path is the same below.Such as: selfluminous cell 12 Light L be incident upon arc-shaped top 101, light L can generate first refractive light L11 and the first reflection light in top surface 101 L12.First reflection light L12 is incident upon side surface 102, can generate the second refracted light L21 and the second reflected light in side surface 102 L22.Second reflection light L22 is incident upon bottom surface 104, can generate third reflect light L31 and third reflected light in bottom surface 104 Line L32.Alternatively, as shown in Figure 2 B, such as: the light M of selfluminous cell 12 is incident upon arc-shaped top 101, and light M can Yu Dingbiao Face 101 generates first refractive light M11 and the first reflection light M12.First reflection light M12 is incident upon the of side bottom surface 103 A part 1031 can generate the second refracted light M21 and the second reflected light M22 in first part 1031.Second reflection light M22 It is incident upon bottom surface 104, third reflect light M31 and third reflection light M32 can be generated in bottom surface 104.Fig. 2 C and Fig. 2 D are aobvious Show the schematic diagram of other possible travel paths of the light in optical texture 10.The shape design of optical texture 10 through the invention The probability that the probability and light projected with increasing light from 112 direction of the lower surface of support plate 10 is projected from bottom surface 104.It shines Device 100 can measure one first brightness in the top (the first side) of upper surface 111, can in the lower section (second side) of lower surface 112 Measure one second brightness, the ratio of the first brightness and the second brightness is between 2~9.The definition of first brightness and the second brightness It can refer to subsequent descriptions.It should be noted, the path in attached drawing is only one of many possible paths, not exclusive path.This Outside, in described above, though light is in being refracted simultaneously on the surface and reflect.However, light also may be only refracted on the surface Or reflection, depending on the refractive index difference of material interface, incident angle, wavelength of light etc..

Fig. 2 E display light emitting device 100 is under electric current 10mA operation and when being in a hot stable state, a resulting light distribution curve. In detail, when light emitting device 100 shines, shining for an imaginary circle (the P1 circle in such as Figure 1A) is measured using Goniophotometer Brightness.Further, light emission luminance and angle mapping can be obtained into a light distribution curve.When measuring, the geometry of light emitting device 100 Center is located substantially in the center of circle of P1 circle.In the present embodiment, concentration expressed in percentage by weight of the spread powder in optical texture 10 is 0.3%.As shown, the maximum brightness of light emitting device 100 is about 4.53 candle light cd, and generally from 0 degree to the brightness of 180 degree In a lambertian distribution (lambertian distribution).Specifically, the brightness minimum and about 0.5 candle light of -90 degree (cd), -90 degree are roughly the same to -80 degree brightness, and -80 degree are cumulative to 90 degree of brightness.- 90~0~90 degree of curve generally with The curve of 90~180~-90 degree is similar, and luminous intensity is spent in -90~0~90 degree of distribution and luminous intensity in 90~180~-90 Distribution relative to 90~-90 degree straight line axial symmetry.In addition, the total brightness of 0~90~180 degree is defined as in light distribution curve First brightness, and the total brightness of 0~-90~-180 degree is defined as the second brightness, the first brightness and the ratio of the second two degrees are about 4.Light emitting angle by obtaining light emitting device 100 in light distribution curve finally is about 160 degree.

Light emitting angle, the angular range for being defined as being included at this time when brightness is the 50% of maximum brightness are to send out Angular.Such as: first rectangular coordinates Tu Ke get will be converted in the light distribution curve (polar coordinates) measured on P1 circle in Fig. 2 E One brightness curve figure；Wherein, X-axis is brightness, and Y-axis is angle (not shown).Then, about 2.265 candle lights (maximum brightness 50%) place is parallel to X-axis and draws straight line and meet at two o'clock with brightness curve figure；The angular range for calculating point-to-point transmission, that is, define For light emitting angle.

Fig. 3 A shows a diagrammatic cross-section of luminescence unit 12A in one embodiment of the invention.Luminescence unit 12A includes a hair Light main body 121, one first transparent body 122, a phosphor powder layer 123, one second transparent body 124 and a third transparent body 125.It shines Main body 121 (does not indicate) Ji Liang electricity comprising a substrate, one first type semiconductor layer, an active layer, the second type semiconductor layer above Pole 1211.When light emitting host 121 is a heterojunction structure, the first type semiconductor layer and the second type semiconductor layer are, for example, clad (claddinglayer) and/or limiting layer (confinement layer), electronics, hole can be provided respectively and have one to be greater than Thus the energy gap of active layer improves electronics, hole and combines in active layer with luminous probability.First type semiconductor layer, activity Layer and the second type semiconductor layer may include III-V race's semiconductor material, such as Al_xIn_yGa_(1-x-y)N or Al_xIn_yGa_(1-x-y)P, Wherein 0≤x, y≤1；(x+y)≦1.According to the material of active layer, a capable of emitting peak value (peak of light emitting host 121 ) or feux rouges of the dominant wavelength (dominant wavelength) between 610nm and 650nm, peak value or main wave wavelength The long blue light of green light or peak value or dominant wavelength between 450nm and 490nm between 530nm and 570nm.Fluorescence Powder structure 123 includes multiple fluorescent powder grains.Fluorescent powder grain has the particle size (diameter) of about 5um~100um and can wrap Phosphor material powder containing one or more kinds of types.Phosphor material powder is including but not limited to yellowish green fluorescent powder and red fluorescence Powder.The ingredient of yellowish green fluorescent powder such as aluminum oxide (YAG or TAG), silicate, vanadate, alkaline-earth metal selenides or Metal nitride.The ingredient of red fluorescence powder such as fluoride (K₂TiF₆:Mn⁴⁺、K₂SiF₆:Mn⁴⁺), silicate, vanadate, alkali Earth metal sulfide, metal oxynitride or tungsten hydrochlorate race mixture.Phosphor structure 123 can absorb 121 institute of light emitting host The first light for issuing simultaneously is converted into the second light with the first smooth different spectral.First light can generate one with the second light mixing and mix Light, such as white light.In this embodiment, the light that luminescence unit 12 generates under hot stable state have a white light colour temperature be 2200K~ 6500K (such as: 2200K, 2400K, 2700K, 3000K, 5700K, 6500K), color dot value (CIE x, y) can fall within seven wheats The range of gram Adam's ellipse (MacAdam ellipse), and have one to be greater than 80 or the color rendering (CRI) greater than 90.Another Embodiment, the first light mix the coloured light that can produce purple light, yellow light or other non-white light with the second light.

It is saturating that luminescence unit 12 is also formed in first transparent body 122, a phosphor powder layer 123 and second comprising an insulating layer 126 124 lower section of phaneroplasm and two electrodes 1211 for not covering light emitting host 121；And two extending electrode 127 be respectively formed in two electrodes It is electrically connected on 1211 and with two electrodes 1211.Two extending electrodes 127 are respectively as the first connection gasket 120A above-mentioned and one second Connection gasket 102B (as shown in figure iD).Insulating layer 126 is a mixture comprising matrix and high reflectance substance.Matrix can be or Silica matrix or epoxy substrate.High reflectance substance may include titanium dioxide, silica or aluminium oxide.In addition, insulating layer 126 Can have the function of reflected light or diffusion light.Extending electrode 127 include metal, such as: copper, titanium, gold, nickel, silver, its alloy or its Lamination.The light that first transparent body 122, second transparent body 124 and the third transparent body 125 issue sunlight or luminescence unit 12 It is transparent.First transparent body 122 or second transparent body 124 may include silica gel (Silicone), epoxy resin (Epoxy), gather Sub- amide (PI), benzocyclobutene (BCB) cross fluorine cyclobutane (PFCB), SU8, acrylic resin (Acrylic Resin), gather Methyl methacrylate (PMMA), polyethylene terephthalate (PET), polycarbonate (PC), polyetherimide (Polyetherimide), fluorocarbon polymer (Fluorocarbon Polymer), aluminium oxide (Al₂O₃), SINR or spin coating glass Glass (SOG).The third transparent body 125 may include sapphire (Sapphire), diamond (Diamond), glass (Glass), epoxy Resin (Epoxy), quartz (quartz), acrylic resin (Acrylic Resin), silica (SiO_X), aluminium oxide (Al₂O₃)、 Zinc oxide (ZnO) or silica gel (Silicone).

As shown in Figure 3A, the third transparent body 125 has a shape wide at the top and narrow at the bottom.In detail, the third transparent body 125 has One first part 1251 and a second part 1252.Closer second transparent body 124 of second part 1252 and its width is less than The width of a part 1251.The thickness of first part 1251 be about 125 integral thickness of the third transparent body 1%~20% or 1%~10%.In the present embodiment, the joint of first part 1251 and second part 1252 is an arc.First part 1251 have a side surface 1251S, slightly tilt (face-up) upward, and remote compared with the side surface 1241 of second transparent body 124 It, can be by ray guidance to the two sides of luminescence unit 12 from light emitting host 121.

In one embodiment, luminescence unit 12A is one towards five face (upper left-right and front-back) luminous light emitting structures and has One about 140 degree of light emitting angle (beam angle).Selectively, a spread powder can make an addition to first transparent body 122 or/and In second transparent body 124 or/and the third transparent body 125.In another embodiment, luminescence unit 12A does not include the third transparent body 125。

Fig. 3 B shows a diagrammatic cross-section of luminescence unit 12B in another embodiment of the present invention.Fig. 3 C is on the one of Fig. 3 B View.The luminescence unit of Fig. 3 B is similar to the light emitting device of Fig. 3 A, element or device corresponding to identical symbol or mark, With similar or identical element or device.As shown in Figure 3B, the third transparent body 125 ' has a frustum (frustum) shape Shape and have a plane 1253 and inclined-plane 1254.The design on inclined-plane 1254 can increase light extraction quantity and the change of light emitting host 121 The light field of luminescence unit 12.Plane 1253 and inclined-plane 1254 can press from both sides one between 120 °~150 ° of angle Ф and the depth on inclined-plane 1254 Degree H1 is the 30%~70% or 40%~60% of the integral thickness H2 of the third transparent body 125 '.As shown in Figure 3 C, plane 1253 area (A1；Triangle) it can be the total projection area (A of the third transparent body 125 '；Oblique line) 40%~95% or 40%~60%.

Fig. 3 D shows a diagrammatic cross-section of luminescence unit 12D in another embodiment of the present invention.The luminescence unit class of Fig. 3 D It is similar to the light emitting device of Fig. 3 A, element corresponding to identical symbol or mark or device, there is similar or identical member Part or device.Luminescence unit 12D also include a catoptric arrangement 129 be formed in first transparent body 124 and second transparent body 125 it Between.Catoptric arrangement 129 when wave-length coverage is between 450nm~475nm, has big the light for being incident on catoptric arrangement 129 In 85% reflectivity；Or have between range of the wavelength between 400nm~600nm of incident light anti-greater than 80% Penetrate rate.The light not reflected by catoptric arrangement 129 can enter the third transparent body 125, and by the top of the third transparent body 125 or Leave luminescence unit 12D or the third transparent body 125 in side.If catoptric arrangement 129 can reflect most light, it is greater than 95% Reflectivity, then the third transparent body 125 in luminescence unit 12D can not have to slightly.Catoptric arrangement 129 can be a single layer structure Or multilayered structure.Single layer structure is, for example, a metal layer, including, for example, silver or aluminium or monoxide layer, including, for example, two Titanium oxide.Multilayered structure can be the lamination or distributing Bragg mirror (Distributed of metal and metal oxide Bragg reflector, DBR) to achieve the effect that reflection.The lamination of metal and metal oxide such as aluminium and aluminium oxide are folded Layer.Distributing Bragg mirror can be non-semiconductor lamination or semiconductor laminated.The material of non-semiconductor lamination can be selected from down Arrange one of group: aluminium oxide (Al₂O₃), silica (SiO₂), titanium dioxide (TiO₂), niobium pentaoxide (Nb₂O₅), silicon nitride (SiN_x).Semiconductor laminated material can be selected from one of following group: gallium nitride (GaN), aluminium gallium nitride alloy (AlGaN), aluminium nitride Indium gallium (AlInGaN), aluminium arsenide (AlAs), aluminum gallium arsenide (AlGaAs), GaAs (GaAs).In the present embodiment, whether Single layer structure or multilayered structure, all will not fully reflective light, therefore the light of at least part can directly through reflection tie Structure 129.

In another embodiment, the luminescence unit 12 in Figure 1A can have similar as single in shone in Fig. 3 A, Fig. 3 B or Fig. 3 D The structure of first 12A, 12B, 12D, but do not include phosphor powder layer 123 in this structure.That is, luminescence unit 12 is only issued from hair The original ray of light main body 121, such as feux rouges, green light or blue light.Multiple fluorescent powder grains (Wavelength conversion substance) can add In optical texture 10, second with the first smooth different spectral is converted into absorb the first light that light emitting host 121 is issued Light, the first light and the second light mixing can generate white light.Therefore, light emitting device 100 can have the white light colour temperature to be under hot stable state 2200K~6500K (such as: 2200K, 2400K, 2700K, 3000K, 5700K, 6500K), color dot value (CIE x, y) can be fallen In the range of seven MacAdam's ellipses (MacAdam ellipse), and have one to be greater than 80 or the color rendering greater than 90 (CRI)。

The luminescence unit of the present embodiment is formed on support plate in a manner of a upside-down mounting.It in other embodiments, can first will be multiple Horizontal or vertical light-emitting unit (not shown) are fixed on support plate using elargol or conductive, transparent glue；Then, using routing Luminescence unit is formed electrical connection by mode each other；Finally, providing optical texture cladding luminescence unit to form light emitting device.

Fig. 4 shows the perspective view of a light bulb 30 in one embodiment of the invention.Light bulb 30 includes a lamp housing 301, a circuit board 302, a support column 303, multiple light emitting devices 100, a radiating piece 304 and an electrical connector 305.Multiple light emitting devices 100 are solid Determine and is electrically connected to support column 303.In detail, an electrode piece 307 is formed on support column 303 and is electrically connected with circuit board 302. The third electronic pads 134 of each light emitting device 100 are connect by a metal wire 308 with circuit board 302.Due to first electrode pad 131 are electrically connected with third electronic pads 134, therefore first electrode pad 131 is also electrically connected with circuit board 302.Each light emitting device 100 Second electrode pad 132 connect with electrode piece 307 by a metal wire 309.In the present embodiment, pass through above-mentioned electrical connection side Formula, so that light emitting device 100 is connected in parallel with each other.In other embodiments, light emitting device 100 can be connected in series or go here and there simultaneously each other Connection.

Fig. 5 A shows the production flow diagram of light emitting device of the present invention.As shown in Fig. 5 A and Fig. 5 B, step 501: providing one Frame 21.There are bracket 21 two frames 211 and multiple support plates 11 to be connected between two frames 211.There is circuit structure 13 on support plate 11, Circuit structure 13 can be formed before or after bracket 21 is shaped with support plate 11.For example, if bracket 21 is with support plate 11 single It is formed on plate using stamp forming technology, circuit structure 13 can be first pre-formed on this single plate material or in stamping It is re-formed after step on support plate 11.As shown in Fig. 5 A and Fig. 5 C, step 502: utilizing surface bonding technology (SMT) by luminous list Member 12 is fixed on support plate 11, and by circuit structure 13, luminescence unit 12 is electrically connected to each other.As shown in Fig. 5 A and Fig. 5 D, step Rapid 503: a die cast is utilized, such as: injection molding (injection molding) or transfer molding (transfer Molding an optical texture 10) is formed, so that it is coated luminescence unit 12 and support plate 11 and only exposes electronic pads 131,132.Such as figure Step 504 shown in 5A and Fig. 5 E: a punching press (punch) or laser cutting manufacture craft are carried out to separate support plate 11 and two frames 211, thus it can form simultaneously or disposably multiple light emitting devices independent of each other 100.

It is to be understood that in the present invention the above embodiments in appropriate circumstances, be can be combined with each other or replace, rather than It is only limitted to described specific embodiment.Each embodiment cited by the present invention is only to illustrate the present invention, not to limit The scope of the present invention.Anyone connects and does not depart from spirit of the invention any obvious modification or change made for the present invention With range.

Claims

1. a kind of light bulb, characterized by comprising:

First support plate, with first part and and from the first part extend second part；

Multiple luminescence units are arranged on the second part；

First electrode pad is arranged in the first part；

Conducting wire is electrically connected in multiple luminescence unit at least one and the first electrode pad；

First reflecting layer is located in the conducting wire

Optical texture includes Wavelength conversion substance, and setting is in the second part and the exposure first part；And

Lamp housing covers first support plate,

Wherein, in top view, the first part is wide compared with the second part.

2. light bulb as described in claim 1, wherein first support plate has upper surface and the following table relative to the upper surface It is bright can to measure first when the light emitting device operates in the upper surface on the upper surface for face, multiple luminescence unit setting Degree, lower in the lower surface can measure the second brightness, and the ratio of first brightness and second brightness is between 2~9.

3. light bulb as described in claim 1, wherein first support plate includes metal material.

4. light bulb as described in claim 1, wherein each multiple luminescence unit has light emitting host and is located at the hair Catoptric arrangement in light main body.

5. light bulb as claimed in claim 4 also covers the catoptric arrangement comprising a transparent configuration.

6. light bulb as claimed in claim 4, wherein each multiple luminescence unit has positive and negative electrode, the positive and negative electrode The opposite side of the light emitting host is located at the catoptric arrangement.

7. light bulb as described in claim 1, also includes the second support plate, second support plate is not parallel with first support plate.

8. light bulb as claimed in claim 7, wherein first support plate and second support plate, which all have, is not provided with any hair The lower surface of light unit.

9. light bulb as claimed in claim 8, wherein the lower surface of first support plate and the lower surface of second support plate are equal Central axis towards the light bulb.

10. light bulb as claimed in claim 7 includes also support column, first support plate and second support plate are both with respect to this Support column inclination.