JP2023044416A - Light-emitting device - Google Patents

Abstract

To provide a light-emitting device which suppresses chromaticity deviation by reducing light emission in an adjacent region.SOLUTION: A light-emitting device 1 includes: a substrate 10 having a first light-emitting region 18a and a second light-emitting region 18b on a surface thereof, on the opposite side of which anode electrodes 26, 28 and cathode electrodes 27, 29 are arranged; a first light-emitting element 11 mounted in the first light-emitting region 18a; a second light-emitting element 12 mounted in the second light-emitting region 18b; a first sealing material 15 containing a phosphor and arranged so as to cover the first light-emitting element 11; a second sealing material 16 arranged so as to cover the first light-emitting element 11, the first sealing material 15 and the second light-emitting element 12; and an interference prevention material 14 arranged between the first light-emitting region 18a and the second light-emitting region 18b and preventing interference between light emitted from the first light-emitting region 18a and light emitted from the second light-emitting region 18b.SELECTED DRAWING: Figure 2

Description

The present invention relates to light emitting devices.

2. Description of the Related Art A technology capable of emitting different colors in a light-emitting device using a light-emitting diode (LED) as a light-emitting element is known. For example, in Patent Document 1, a phosphor-containing resin layer made of resin containing different phosphors is provided so as to cover light-emitting elements mounted in a plurality of areas surrounded by a resin frame and resin partitions. A light emitting device comprising emitting light having different colors from multiple zones is described. The light-emitting device described in Patent Document 1 emits white light from one light-emitting region, emits blue or red light from another light-emitting region, and mixes the light emitted from a plurality of light-emitting regions. Thus, light with different color temperatures is emitted.

JP 2015-43469 A

However, in the light-emitting device described in Patent Literature 1, the light transmitted through the white resin becomes excitation light, causing adjacent regions to emit light, which may cause a chromaticity deviation.

An object of the present invention is to solve such problems, and to provide a light-emitting device that suppresses chromaticity shift by reducing light emission in adjacent regions.

A light-emitting device according to the present invention comprises a substrate having a first light-emitting region and a second light-emitting region adjacent to the first light-emitting region on its surface, and an anode electrode and a cathode electrode disposed on the opposite side of the surface; A first light-emitting element mounted in the light-emitting region, a second light-emitting element mounted in the second light-emitting region, and disposed between the first light-emitting region and the second light-emitting region, and emitted from the first light-emitting region It contains an interference prevention material for preventing interference between light and light emitted from the second light emitting region, and a phosphor, and is arranged to cover the first light emitting element and reach the outer edge of the first light emitting region. A first encapsulant, a second encapsulant arranged to cover the first light emitting element and the first encapsulant, and a third encapsulant arranged to cover the second light emitting element However, the height of the first encapsulant immediately above the upper surface of the first light emitting element increases as the distance from the second light emitting region increases.

Furthermore, it is preferable that the light-emitting device according to the present invention further includes a reflector arranged along at least part of the outer edge of each of the first light-emitting region and the second light-emitting region.

Further, in the light-emitting device according to the present invention, each of the first light-emitting region and the second light-emitting region has a rectangular planar shape with one side extending along the interference prevention member, and the reflector is the first light-emitting region. and along the side opposite to the side extending along the interference prevention member of each of the second light emitting regions.

Furthermore, in the light emitting device according to the present invention, the second encapsulant and the third encapsulant are made of the same resin, and both the second encapsulant and the third encapsulant do not contain a phosphor. is preferred.

Furthermore, the light-emitting device according to the present invention further includes a fourth encapsulant arranged to cover the second light-emitting element and the third encapsulant, and the third encapsulant is attached to the first encapsulant. It is preferable that the third encapsulant contains a phosphor different from the contained phosphor, and the height of the third encapsulant immediately above the upper surface of the second light emitting element increases as the distance from the first light emitting region increases.

Furthermore, in the light-emitting device according to the present invention, the distance between the side of the first light-emitting region facing the side extending along the first light-emitting element and the interference prevention member is the distance extending along the first light-emitting element and the interference prevention member. It is preferably shorter than the separation distance between the sides of the first light emitting region.

Furthermore, in the light emitting device according to the present invention, it is preferable that the height of the anti-interference material is equal to the height of the reflector.

Furthermore, in the light-emitting device according to the present invention, it is preferable that the substrate is formed with a notch along the outer edge, and the bottom of the reflector is engaged with the notch.

Furthermore, in the light-emitting device according to the present invention, it is preferable that the substrate has a recess formed between the first light-emitting region and the second light-emitting region, and the bottom of the interference prevention material is engaged with the recess.

Furthermore, in the light-emitting device according to the present invention, the interference prevention material is preferably made of a light-reflecting material that reflects light emitted from the first light-emitting region and the second light-emitting region.

Furthermore, in the light-emitting device according to the present invention, it is preferable that the light emitted from the first light-emitting region is white light, and the second light-emitting element emits blue light.

Further, the light-emitting device according to the present invention includes: a third light-emitting element mounted in the second light-emitting region and emitting red light; a fourth light-emitting element mounted in the second light-emitting region and emitting green light; , wherein the second light emitting element is preferably arranged further away from the interference prevention material than the third light emitting element and the fourth light emitting element.

Furthermore, in the light-emitting device according to the present invention, it is preferable that the height of the surface of the first sealing member in contact with the interference prevention member is lower than the height of the upper surface of the second light-emitting element.

Further, in the light emitting device according to the present invention, the anode electrode and the cathode electrode are further arranged on the side surface which is the surface adjacent to the surface, and the anode electrode and the cathode electrode are arranged on the opposite side of the surface along the extending direction of the reflector. is preferably arranged.

The light emitting device according to the present invention can suppress chromaticity deviation by reducing light emission in adjacent regions.

1 is a perspective view of a light emitting device according to a first embodiment; FIG. (a) is a plan view of the light emitting device shown in FIG. 1, (b) is a bottom view of the light emitting device shown in FIG. 1, (c) is a front view of the light emitting element shown in FIG. ) is a sectional view taken along line AA shown in (a), and (e) is a sectional view taken along line BB shown in (a). 2 is a flowchart showing a method for manufacturing the light emitting device shown in FIG. 1; (a) is a diagram showing a substrate preparation process shown in FIG. 3, (b) is a diagram showing a substrate cutting process shown in FIG. 3, and (c) is a diagram showing a light emitting element mounting process shown in FIG. (d) is a diagram showing an interference prevention material placement step shown in FIG. 3, (e) is a diagram showing a reflector placement step shown in FIG. 3, and (f) is a first seal shown in FIG. It is a figure which shows a stopping material arrangement|positioning process. FIG. 10 is a perspective view of a light emitting device according to a second embodiment; (a) is a plan view of the light emitting device shown in FIG. 5, (b) is a bottom view of the light emitting device shown in FIG. 5, (c) is a front view of the light emitting device shown in FIG. ) is a sectional view taken along line CC shown in (a), and (e) is a sectional view taken along line DD shown in (a). FIG. 7 is a diagram for explaining a preferred height of the interference prevention member shown in FIG. 6; 7 is a flowchart showing a method for manufacturing the light emitting device shown in FIG. 6; (a) is a cross-sectional view of a light-emitting device according to a first modification, (b) is a cross-sectional view of a light-emitting device according to a second modification, and (c) is a cross-section of a light-emitting device according to a third modification. FIG. 11D is a cross-sectional view of a light emitting device according to a fourth modified example; (a) is a cross-sectional view of a light-emitting device according to a fifth modification, and (b) is a cross-sectional view of a light-emitting device according to a sixth modification. (a) is a plan view of a light emitting device according to a seventh modification, (b) is a plan view of a light emitting device according to an eighth modification, and (c) is a plan view of a light emitting device according to a ninth modification. FIG. 12D is a plan view of a light-emitting device according to a tenth modification; FIG. (a) is a plan view of a light emitting device according to an eleventh modification, and (b) is a plan view of a light emitting device according to a twelfth modification. FIG. 21 is a plan view of a light-emitting device according to a thirteenth modification; FIG. 14 is a cross-sectional view taken along line EE shown in FIG. 13; FIG. 20 is a perspective view of a light emitting device according to a fourteenth modification; (a) is a front view of the light emitting device shown in FIG. 15, (b) is a rear view of the light emitting device shown in FIG. 15, (c) is a plan view of the light emitting device shown in FIG. ) is a bottom view of the light emitting device shown in FIG. 15, and (e) is a side view of the light emitting device shown in FIG. FIG. 21 is a perspective view of a light emitting device according to a fifteenth modification; (a) is a front view of the light emitting device shown in FIG. 17, (b) is a rear view of the light emitting device shown in FIG. 17, (c) is a plan view of the light emitting device shown in FIG. ) is a bottom view of the light emitting device shown in FIG. 17, and (e) is a side view of the light emitting device shown in FIG.

A light emitting device according to the present invention will be described below with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to those embodiments, but extends to the invention described in the claims and equivalents thereof.

(Structure and Function of Light Emitting Device According to First Embodiment)
1 is a perspective view of the light emitting device according to the first embodiment, FIG. 2(a) is a plan view of the light emitting device shown in FIG. 1, and FIG. 2(b) is a bottom view of the light emitting device shown in FIG. , and FIG. 2(c) is a front view of the light emitting device shown in FIG. 2(d) is a cross-sectional view taken along line AA shown in FIG. 2(a), and FIG. 2(e) is a cross-sectional view taken along line BB shown in FIG. 2(a).

The light emitting device 1 includes a substrate 10, a first light emitting element 11, a second light emitting element 12, a reflector 13, an interference prevention material 14, a first sealing material 15, and a second sealing material 16. , and a third sealing material 17. FIG. The reflective material 13 and the interference prevention material 14 are arranged in a first light emitting region 18a where the first light emitting element 11 is mounted and a first sealing material 15 and a second sealing material 16 overlapping the first sealing material 15 are arranged. and a second light emitting region 18b in which the second light emitting element 12 is mounted and the third sealing material 17 is arranged. Each of the first light emitting region 18 a and the second light emitting region 18 b has a rectangular planar shape with one side extending along the interference prevention member 14 .

The base material 10 has a rectangular planar shape made of an insulating resin such as a glass epoxy resin. The substrate 10 has a notch 10a formed along its outer edge and a recess 10b formed between the first light emitting region 18a and the second light emitting region 18b. The concave portion 10b is formed between a pair of opposing sides of the substrate 10 over the entire boundary between the first light emitting region 18a and the second light emitting region 18b.

A first anode wiring 21 , a first cathode wiring 22 , a second anode wiring 23 and a second cathode wiring 24 are arranged on the surface of the substrate 10 . A first anode electrode 26 , a first cathode electrode 27 , a second anode electrode 28 and a second cathode electrode 29 are arranged on the rear surface of the substrate 10 . The first anode wiring 21 , the first cathode wiring 22 , the second anode wiring 23 and the second cathode wiring 24 are arranged so as to be point symmetrical about the center of the surface of the substrate 10 . Also, the first anode electrode 26, the first cathode electrode 27, the second anode electrode 28, and the second cathode electrode 29 are arranged point-symmetrically about the center of the back surface of the substrate 10. As shown in FIG.

The first anode wiring 21, the first cathode wiring 22, the second anode wiring 23, and the second cathode wiring 24 are formed of conductive thin films such as copper. The first anode wiring 21 and the second anode wiring 23 have the same planar shape, and the first cathode wiring 22 and the second cathode wiring 24 have the same planar shape. The areas of the first cathode wiring 22 and the second cathode wiring 24 are larger than the areas of the first anode wiring 21 and the second anode wiring 23 .

The first anode electrode 26, the first cathode electrode 27, the second anode electrode 28, and the second cathode electrode 29 are made of a conductive member such as copper. The first anode electrode 26, the first cathode electrode 27, the second anode electrode 28 and the second cathode electrode 29 have the same planar shape. Each of the first anode electrode 26 to the second cathode electrode 29 is connected to each of the first anode wiring 21, the first cathode wiring 22, the second anode wiring 23, and the second cathode wiring 24, and the through electrode penetrating the substrate 10. 25.

The first light emitting element 11 is a blue LED die having a rectangular planar shape, and is mounted on the first cathode wiring 22 by bonding with an insulating die bonding material (not shown). The first light emitting element 11 is connected to the first anode wiring 21 and the first cathode wiring 22 via bonding wires 30, which are linear members made of a conductive material such as gold.

The first light emitting element 11 is arranged in the center of the first light emitting region 18a in the short direction. That is, the separation distance between the side of the first light emitting region 18 a facing the side extending along the first light emitting element 11 and the interference prevention member 14 is the first distance along the first light emitting element 11 and the interference prevention member 14 extending along the interference prevention member 14 . It is equal to the separation distance between the sides of the light emitting region 18a.

The first light emitting element 11 emits blue light in response to forward voltage being applied to the first anode electrode 26 and the first cathode electrode 27 . The dominant wavelength of the blue light emitted from the first light emitting element 11 is within the range between 430 nm and 495 nm, and is 450 nm in one example. The first light emitting element 11 is formed by laminating a PN junction layer formed of a gallium nitride (GaN) layer on a transparent sapphire substrate.

Like the first light emitting element 11, the second light emitting element 12 is a blue LED die having a rectangular planar shape, and is mounted on the second cathode wiring 24 by bonding with an insulating die bonding material (not shown). be.

The second light emitting element 12 is arranged in the center of the second light emitting region 18b in the short direction. That is, the separation distance between the side of the second light emitting region 18b facing the side extending along the second light emitting element 12 and the interference preventing member 14 is the second distance extending along the second light emitting element 12 and the interference preventing member 14. It is equal to the separation distance between the sides of the light emitting region 18b.

The second light emitting element 12 is connected to the second anode wiring 23 and the second cathode wiring 24 via the bonding wires 30, and responds to forward voltage being applied to the second anode electrode 28 and the second cathode electrode 29. emit blue light.

The reflector 13 is a white resin formed by containing white particles such as titanium oxide in a transparent resin such as silicone resin. The white resin is a light reflecting material that reflects light emitted from the first light emitting region 18a and the second light emitting region 18b. The reflector 13 has a frame-like planar shape along the outer edge of the substrate 10 and is arranged so that the bottom thereof engages with the notch 10 a of the substrate 10 .

Like the reflector 13, the interference prevention material 14 is a white resin formed by containing white particles such as titanium oxide in a transparent resin such as silicone resin. The interference prevention member 14 has a linear planar shape and is arranged so that the bottom thereof engages with the concave portion 10 b of the base material 10 .

The height of the interference prevention material 14 from the surface of the base material 10 is equal to the height of the reflector 13 from the surface of the base material 10 . The height from the surface of the base material 10 of the reflecting material 13 and the interference preventing material 14 is the top of each of the reflecting material 13 and the interference preventing material 14, the surface of the reflecting material 13 and the interference preventing material 14, and the base material 10. is the distance between the parts where When the height difference from the surface of the base material 10 of the reflector 13 and the interference prevention material 14 is within 5% of the height of the reflector 13 from the surface of the base material 10, the base material of the interference prevention material 14 The height of 10 from the surface is equal to the height of reflector 13 from the surface of substrate 10 .

The first sealing material 15 is made of a transparent resin such as silicone resin, and contains a phosphor that emits yellow light, such as Yttrium Aluminum Garnet (YAG). The first sealing material 15 is arranged so as to cover part or all of the side of the first light emitting region 18a opposite to the side extending along the extending direction of the interference prevention material 14, and is in contact with the reflector 13. Part or all of the bonding wires 30 connected to the first light emitting element 11 and the first light emitting element 11 are sealed. The first sealing member 15 is arranged so as to cover part or all of the side of the first light emitting region 18a opposite to the side extending along the extending direction of the interference prevention member 14, so that the first light emitting region 18a reaches the outer edge of Note that the first sealing member 15 does not have to be in contact with the interference prevention member 14 . The first sealing member 15 has a substantially fan-shaped cross-sectional shape that rises with increasing distance from the second light emitting region 18b and curves in a convex shape. Also, the height of the surface of the first sealing member 15 in contact with the interference prevention member 14 is lower than the height of the upper surface of the second light emitting element 12 . In the first light emitting region 18a, in response to the blue light emitted from the first light emitting element 11, the blue light and the yellow light emitted from the phosphor contained in the first sealing material 15 are mixed. Emit mixed white light.

The second sealing material 16 is made of transparent resin such as silicone resin, and is arranged to cover the entire first light emitting region 18a. The second encapsulant 16 is arranged to cover the first light emitting element 11 , the bonding wires 30 connected to the first light emitting element 11 , and the first encapsulant 15 .

The third sealing material 17 is made of the same resin as the second sealing material 16, and is arranged so as to cover the entire second light emitting region 18b. The third encapsulant 17 is arranged to cover the second light emitting element 12 and the bonding wire 30 connected to the second light emitting element 12, and the bonding wire connected to the second light emitting element 12 and the second light emitting element 12. 30 is sealed. The second light emitting region 18 b emits blue light in response to the blue light emitted from the second light emitting element 12 .

(Manufacturing Method of Light Emitting Device According to First Embodiment)
FIG. 3 is a flow chart showing a method for manufacturing the light emitting device 1. As shown in FIG. 4(a) is a diagram showing the substrate preparation process shown in FIG. 3, FIG. 4(b) is a diagram showing the substrate cutting process shown in FIG. 3, and FIG. 4(c) is a diagram showing the light emitting element shown in FIG. It is a figure which shows a mounting process. 4(d) is a diagram showing the step of arranging the interference prevention material shown in FIG. 3, FIG. 4(e) is a diagram showing the step of arranging the reflector shown in FIG. 3, and FIG. It is a figure which shows the 1st sealing material arrangement|positioning process shown. 4(a) to 4(f) are cross-sectional views corresponding to the cross-sectional view taken along line AA shown in FIG. 2(a).

First, the substrate 10 is prepared in the substrate preparation step (S101). The substrate 10 may be prepared as a collective substrate having a structure in which a plurality of substrates 10 are arranged in rows and columns at a predetermined arrangement pitch.

Next, in the substrate cutting step, the notch 10a and the recess 10b are formed by cutting the surface of the base material 10 (S102). The notch 10a and the recess 10b are grooves having a rectangular cross-sectional shape and extending in parallel in the same direction.

Next, in the light emitting element mounting step, the first light emitting element 11 and the second light emitting element 12 are mounted on the substrate 10 (S103). The first light emitting element 11 is mounted on the first cathode wiring 22 by bonding to the first cathode wiring 22 with a die bonding material. The second light emitting element 12 is mounted on the second cathode wiring 24 by bonding to the second cathode wiring 24 with a die bonding material.

Next, in a wire bonding process, the first light emitting element 11 is connected to the first anode wiring 21 and the first cathode wiring 22, and the second light emitting element 12 is connected to the second anode wiring 23 and the second cathode wiring 24. (S104). The first light emitting element 11 is electrically connected to the first anode electrode 26 and the first cathode electrode 27 by being connected to the first anode wiring 21 and the first cathode wiring 22 . The second light emitting element 12 is electrically connected to the second anode electrode 28 and the second cathode electrode 29 by being connected to the second anode wiring 23 and the second cathode wiring 24 .

Next, in the interference preventing material placement step, the interference preventing material 14 is placed so that the bottom surface is in contact with the concave portion 10b formed in the substrate cutting step shown in S102 (S105). Next, in the reflector arrangement step, the reflector 13 is arranged so that the bottom surface is in contact with the notch 10a formed in the substrate cutting step shown in S102 (S106). The reflective material 13 and the anti-interference material 14 are engaged with the notch 10a and the recess 10b by a transparent adhesive.

Next, in the first encapsulant placement step, the first encapsulant 15 is placed so as to seal the first light emitting element 11 and part or all of the bonding wire 30 connected to the first light emitting element 11. (S107). First, the resin of the first sealing material 15 before hardening is applied to the first light emitting region 18a so as to cover part or all of the first light emitting element 11 and the bonding wires 30 connected to the first light emitting element 11. . Next, the substrate 10 is heated to solidify the resin of the first sealing material 15 before solidification, and the first sealing material 15 is integrally formed.

Then, in the second and third encapsulant placement steps, the second encapsulant 16 and the third encapsulant 17 are connected to the first encapsulant 15, the second light emitting element 12, and the second light emitting element 12. It is arranged so as to seal the bonding wire 30 (S108). First, the resins of the second sealing material 16 and the third sealing material 17 before hardening are applied over the entire surfaces of the first light emitting region 18a and the second light emitting region 18b. The resins of the second encapsulant 16 and the third encapsulant 17 before being solidified are used as the first encapsulant 15 arranged in the first light emitting region 18a and the second light emitting element arranged in the second light emitting region 18b. 12 and the bonding wires 30 connected to the second light emitting element 12 are coated. Next, the base material 10 is heated to solidify the pre-hardened resins of the second sealing material 16 and the third sealing material 17, so that the second sealing material 16 and the third sealing material 17 are It is integrally formed over the entire surface of the base material 10 .

(Action and effect of the light emitting device according to the first embodiment)
In the light emitting device 1 , the reflector 13 is arranged along the outer edge of the substrate 10 , and the first anode electrode 26 , the first cathode electrode 27 , the second anode electrode 28 and the second cathode electrode 29 are arranged on the back surface of the substrate 10 . , so the size can be minimized. The size of the light emitting device 1 is defined according to the insulation distance between the first anode wiring 21 and the second cathode wiring 24 and between the first anode electrode 26 and the second cathode electrode 29 .

Further, in the light-emitting device 1, the interference prevention material 14 is arranged between the first light-emitting region 18a and the second light-emitting region 18b, so that blue light emitted from the second light-emitting region 18b is emitted from the first light-emitting region 18a. There is a low possibility that the light will be incident on the first sealing material 15 arranged at the bottom and be whitened.

In addition, in the light emitting device 1, the reflector 13 and the interference prevention member 14 are engaged with the notch 10a and the recess 10b, so that they are firmly connected to the base material 10, and the reflector 13, the interference prevention member 14, the first The possibility that the sealing material 15 and the second sealing material 16 are separated from the base material 10 is low. In addition, since the reflecting material 13 and the interference preventing material 14 are engaged with the notch 10a and the recess 10b, the first light emitting element 11 and the second light emitting element 11 and the second light emitting element 11 and the second light emitting element 11 pass through the adhesive bonding the reflecting material 13 and the interference preventing material 14 together. Leakage of light emitted from the light emitting element 12 can be prevented.

In addition, in the light emitting device 1, the surface of the first sealing member 15 in contact with the interference prevention member 14 is lower than the upper surface of the second light emitting element 12. Therefore, when only the second light emitting element 12 emits light, , the amount of light incident on the phosphor contained in the first encapsulant 14 from the second light emitting element 12 is reduced. In the light emitting device 1, the amount of light incident on the phosphor contained in the first sealing material 14 from the second light emitting element 12 is reduced. It is possible to reduce the possibility that the light will be emitted from the fluorescent material when the light is incident on the fluorescent material contained in the stopper material 15 .

(Structure and Function of Light Emitting Device According to Second Embodiment)
5 is a perspective view of the light emitting device according to the second embodiment, FIG. 6(a) is a plan view of the light emitting device shown in FIG. 5, and FIG. 6(b) is a bottom view of the light emitting device shown in FIG. , and FIG. 6C is a front view of the light emitting device shown in FIG. FIG. 6(d) is a cross-sectional view along line CC shown in FIG. 6(a), and FIG. 6(e) is a cross-sectional view along line DD shown in FIG. 6(a).

The light-emitting device 2 includes a reflector 33 , an interference prevention member 34 , a second sealing member 36 and a third sealing member 37 as a reflector 13 , an interference prevention member 14 , a second sealing member 16 and a third sealing member 17 . is different from the light-emitting device 1 in that it has instead of . The configurations and functions of the components of the light-emitting device 2 other than the reflector 33, the interference prevention member 34, the second sealing member 36, and the third sealing member 37 are the same as those of the components of the light-emitting device 1 denoted by the same reference numerals. and functions are the same, so a detailed description thereof will be omitted here.

The reflector 33 is different from the reflector 13 in that a concave portion 33a is formed in the upper center of a pair of surfaces perpendicular to the extending direction of the interference prevention member 34 . The configuration and function of the reflector 33 are the same as those of the reflector 13, except for the formation of the concave portion 33a, so detailed description thereof will be omitted here.

The interference prevention member 34 differs from the interference prevention member 14 in height. The height of the interference prevention member 14 is equal to the height of the reflector 13, whereas the height of the interference prevention member 34 is higher than the height of the surface of the second light emitting element 12 and lower than the height of the reflector 33. . Since the configuration and function of the interference prevention member 34 other than the height are the same as those of the interference prevention member 14, detailed description thereof will be omitted here.

FIG. 7 is a diagram for explaining a preferred height of the interference prevention member 34. As shown in FIG. FIG. 7 is a cross-sectional view taken along line CC shown in FIG. 6(a).

The interference prevention member 34 preferably has a height such that the first sealing member 15 is positioned below the tangent line of the interference prevention member 34 that passes through the surface of the second light emitting element 12 . The center Pc of the surface of the second light emitting element 12 is the intersection of diagonal lines of the second light emitting element 12 having a rectangular planar shape. When the second light emitting element has a circular planar shape, the center of the surface of the second light emitting element is the center of the circle, and when the second light emitting element has a triangular planar shape, the surface of the second light emitting element is the centroid of the triangle.

A tangent line Lc is a straight line that passes through the center Pc of the surface of the second light emitting element 12 and touches the interference prevention member 34 at one point in the cross section along line CC of the light emitting device 2 . If there are a plurality of straight lines that pass through the center Pc of the surface of the second light emitting element 12 and touch the interference prevention member 34 at one point, the tangent line Lc is the highest straight line that touches the interference prevention member 34 .

The second sealing member 36 and the third sealing member 37 have a groove 36a formed in the upper center along the extending direction of the interference prevention member 34. differ from The groove 36 a is formed above the interference prevention member 34 so that the bottom surface thereof contacts the upper end of the interference prevention member 34 . The configuration and function of the second sealing member 36 and the third sealing member 37 are the same as the configuration and function of the second sealing member 16 and the third sealing member 17, except that the groove 36a is formed. A detailed description is omitted here.

(Method for Manufacturing Light Emitting Device According to Second Embodiment)
FIG. 8 is a flow chart showing a method for manufacturing the light emitting device 2. As shown in FIG.

Since the processing of S201 to S208 is the same as the processing of S101 to S108, detailed description is omitted here. In the concave portion forming step, the reflector 33, the interference prevention member 34, the second sealing member 36, and the third sealing member 37 arranged on the surface of the base material 10 are cut (S209). The reflector 33, the interference prevention member 34, the second sealing member 36, and the third sealing member 37 are cut along the extension direction of the interference prevention member 34 to form grooves 36a.

(Action and effect of the light emitting device according to the second embodiment)
In the light emitting device 2, since the height of the interference preventing material 34 is higher than the height of the surface of the second light emitting element 12, the amount of light emitted from the second light emitting element 12 and entering the first light emitting region 18a is reduced. be able to. In the light-emitting device 2, by reducing the amount of light entering the first light-emitting region 18a from the second light-emitting element 12, when only the second light-emitting element 12 emits light, it is contained in the first encapsulant 15. It is possible to reduce the possibility that the light is emitted from the phosphor by the light being incident on the phosphor.

Further, in the light emitting device 2, since the height of the interference preventing member 34 is lower than the height of the reflecting member 33, the amount of light absorbed by the interference preventing member 34 can be made smaller than in the light emitting device 1. Efficiency can be increased.

In addition, in the light emitting device 2, since the interference prevention member 34 has a height such that the first sealing member is positioned below the tangent line of the interference prevention member 34 passing through the surface of the second light emitting element 12, the second light emitting element 12 The emitted light is less likely to enter the phosphor contained in the first sealing material 15 . Since the light emitted from the second light emitting element 12 does not enter the first sealing member 15, the light emitting device 2 is arranged such that blue light emitted from the second light emitting region 18b is arranged in the first light emitting region 18a. There is a low possibility that the light will enter the sealing material 15 and become white.

(Modification of Light Emitting Device According to Embodiment)
In the light emitting devices 1 and 2, the first light emitting element 11 and the second light emitting element 12 are blue LED dies. However, in the light emitting device according to the embodiment, at least one of the first light emitting element and the second light emitting element may be a light emitting element other than the blue LED die, such as a red LED die and a green LED die.

In the light emitting devices 1 and 2, the first sealing member 15 is configured to be in contact with the interference preventing member 14 or the interference preventing member 34, but in the light emitting device according to the embodiment, the first sealing member 15 is configured to prevent interference. It does not have to be in contact with the material 14 or the interference prevention material 34 .

In addition, in the light-emitting devices 1 and 2, the first light-emitting element 11 and the second light-emitting element 12 are electrically connected to the wiring by the bonding wires 30, but in the light-emitting device according to the embodiment, the light-emitting element is a flip chip. A connection may be connected to the wiring.

Further, in the light-emitting devices 1 and 2, the interference prevention members 14 and 34 are formed separately from the reflectors 13 and 33, but in the light-emitting device according to the embodiment, the interference prevention members are formed integrally with the reflector. good too.

Further, in the light-emitting devices 1 and 2, the second sealing material and the third sealing material are made of the same resin. may be molded from different resins.

Further, in the light-emitting devices 1 and 2, the first light-emitting element 11 is arranged in the center of the first light-emitting region 18a in the short-side direction. It may be arranged outside from the center in the short direction of the light emitting region 18a. By arranging the first light emitting element 11 on the outside, the separation distance between the first light emitting element 11 and the side of the first light emitting region 18 a facing the side extending along the interference prevention material 14 is and the side of the first light emitting region 18 a extending along the interference prevention member 14 . By arranging the first light emitting elements 11 outward from the center in the short direction of the first light emitting region 18a, the number of phosphors that absorb the light emitted from the first light emitting elements 11 is increased to increase the number of phosphors. can be wavelength-converted by the phosphor.

Further, in the light-emitting devices 1 and 2, the second light-emitting element 12 is arranged in the center of the second light-emitting region 18b in the short direction. It may be arranged outside from the center in the short direction of the light emitting region 18b. By arranging the second light emitting element 12 on the outside, the distance between the second light emitting element 12 and the side of the second light emitting region 18 b facing the side extending along the interference prevention material 14 is and the side of the second light emitting region 18b extending along the interference prevention member 14. By arranging the second light emitting element 12 outward from the center in the short direction of the second light emitting region 18b, the blue light emitted from the second light emitting element 12 is arranged in the first light emitting region 18a. The amount of light incident on the sealing material 15 can be reduced.

9A is a cross-sectional view of a light emitting device according to a first modification, FIG. 9B is a cross-sectional view of a light emitting device according to a second modification, and FIG. 9C is a third modification. FIG. 9D is a cross-sectional view of a light-emitting device according to a fourth modified example. Each of FIGS. 9(a) to 9(d) is a cross-sectional view corresponding to the cross-sectional view shown in FIG. 2(d).

A light-emitting device 3 according to the first modification differs from the light-emitting device 1 in that it has a substrate 40 and an interference prevention member 44 instead of the substrate 10 and the interference prevention member 14 . The configurations and functions of the constituent elements of the light-emitting device 3 other than the base material 40 and the interference prevention material 44 are the same as the configurations and functions of the constituent elements of the light-emitting device 1 denoted by the same reference numerals, so detailed description thereof will be omitted here. . The base material 40 differs from the base material 10 in that the concave portion 10b is not formed. Since the configuration and function of the base material 40 are the same as those of the base material 10 except that the concave portion 10b is not formed, detailed description thereof will be omitted here.

The interference prevention material 44, also called a dam material, is a white resin containing white particles such as titanium oxide, and is provided between the first anode wiring between the first light emitting region 18a and the second light emitting region 18b. 21 and the first cathode wiring 22 are arranged to extend in parallel with the arrangement direction. Like the interference prevention member 34 , the interference prevention member 44 preferably has a height such that the first sealing member 15 is positioned below the tangent line of the interference prevention member 44 that passes through the surface of the second light emitting element 12 .

The interference prevention material 44 is arranged on the surface of the base material 10 after the first light emitting element 11 and the second light emitting element 12 are respectively wire-bonded by the wire bonding process and before the first sealing material 15 is arranged. be done.

A light-emitting device 4 according to the second modification differs from the light-emitting device 3 in that an interference prevention member 45 is provided instead of the interference prevention member 44 . The configurations and functions of the constituent elements of the light emitting device 4 other than the interference prevention material 45 are the same as the configurations and functions of the constituent elements of the light emitting device 3 denoted by the same reference numerals, and therefore detailed descriptions thereof are omitted here.

The interference prevention material 45 is a white resin containing white particles such as titanium oxide, and is arranged on the surface of the base material 40 so as to surround the second light emitting element 12 . The thickness of the interference prevention material 45 is thinner than the height of the second light emitting element 12 .

The interference prevention material 45 is applied to the second light emitting element 12 before the second sealing material 16 is placed after the first sealing material 15 is placed on the surface of the base material 10 by the first sealing material placement step. is arranged on the surface of the base material 40 so as to surround the periphery of the .

A light-emitting device 5 a according to the third modification differs from the light-emitting device 1 in that an interference prevention member 46 is provided instead of the interference prevention member 14 . The configurations and functions of the constituent elements of the light emitting device 5a other than the interference prevention member 46 are the same as the configurations and functions of the constituent elements of the light emitting device 1 denoted by the same reference numerals, and therefore detailed description thereof is omitted here.

The interference prevention material 46 is a black resin formed by containing black particles such as carbon in a transparent resin such as silicone resin. The black resin is a light absorbing material that absorbs light emitted from the first light emitting region 18a and the second light emitting region 18b. Like the interference prevention member 14 , the interference prevention member 46 has a substantially rectangular cross-sectional shape, and is arranged so that the bottom thereof engages with the concave portion 10 b of the base material 10 . The height of the interference prevention material 46 from the surface of the base material 10 is equal to the height of the reflector 13 from the surface of the base material 10 .

A light-emitting device 5 b according to the fourth modification differs from the light-emitting device 2 in that an interference prevention member 47 is provided instead of the interference prevention member 34 . The configurations and functions of the constituent elements of the light emitting device 5b other than the interference prevention member 47 are the same as the configurations and functions of the constituent elements of the light emitting device 1 denoted by the same reference numerals, and therefore detailed description thereof is omitted here. Like the interference prevention member 46, the interference prevention member 47 is a black resin formed by containing black particles such as carbon in transparent resin such as silicone resin. The interference prevention member 47 has a height such that the first sealing member 15 is positioned below the tangent line of the interference prevention member 47 that passes through the surface of the second light emitting element 12 .

Further, in the light-emitting devices 1 and 2, the second light-emitting element 12 is sealed with a third sealing material that does not contain a phosphor, but in the light-emitting device according to the embodiment, the second light-emitting element 12 is may be sealed with a sealing material containing

FIG. 10(a) is a cross-sectional view of a light emitting device according to a fifth modification, and FIG. 10(b) is a cross-sectional view of a light emitting device according to a sixth modification. 10(a) and 10(b) are cross-sectional views corresponding to the cross-sectional view shown in FIG. 2(d).

A light-emitting device 6 a according to the fifth modification differs from the light-emitting device 1 in that it has a third sealing member 17 a and a fourth sealing member 17 b instead of the third sealing member 17 . The configurations and functions of the components of the light-emitting device 6a other than the third sealing member 17a and the fourth sealing member 17b are the same as the configurations and functions of the components of the light-emitting device 1 denoted by the same reference numerals. detailed description is omitted.

The third encapsulant 17a is made of a transparent resin such as silicone resin, and contains a phosphor that emits red light and has a basic composition such as CaAlSiN ₃ :Eu (CASN). Similar to the first sealing member 15, the third sealing member 17a is arranged along the extension direction of the interference prevention member 14 so as to cover the entire second light emitting region 18b. Part or all of the bonding wires 30 connected to the light emitting element 12 are sealed. The third sealing member 17a has a substantially fan-shaped cross-sectional shape that rises with increasing distance from the first light emitting region 18a and curves in a convex shape. The second light emitting region 18b emits red light emitted from the phosphor contained in the third sealing material 17a in response to the blue light emitted from the second light emitting element 12 .

The fourth encapsulant 17b is made of transparent resin such as silicone resin, and is arranged to cover the entire second light emitting region 18b. The fourth encapsulant 17b is arranged to cover the second light emitting element 12, the bonding wire 30 connected to the second light emitting element 12, and the third encapsulant 17a. The fourth sealing material 17b may contain a phosphor.

A light emitting device 6b according to the sixth modification differs from the light emitting device 2 in that it has a third sealing member 37a and a fourth sealing member 37b instead of the third sealing member 37. FIG. The configurations and functions of the components of the light-emitting device 6b other than the third sealing member 37a and the fourth sealing member 37b are the same as the configurations and functions of the components of the light-emitting device 2 denoted by the same reference numerals. detailed description is omitted.

The third encapsulant 37a is formed of a transparent resin such as silicone resin, similarly to the third encapsulant 17a, and includes a phosphor that emits red light and has a basic composition of CaAlSiN ₃ :Eu (CASN) or the like. contains. Similar to the third sealing member 17a, the third sealing member 37a is arranged along the extension direction of the interference preventing member 14 so as to cover the entire second light emitting region 18b. Part or all of the bonding wires 30 connected to the light emitting element 12 are sealed. The third sealing member 37a has a substantially fan-shaped cross-sectional shape that rises with increasing distance from the first light emitting region 18a and curves in a convex shape. In response to blue light emitted from the second light emitting element 12, the second light emitting region 18b emits red light emitted from the phosphor contained in the third sealing material 37a.

The fourth encapsulant 37b is made of transparent resin such as silicone resin, and is arranged to cover the entire second light emitting region 18b. The fourth encapsulant 37b is arranged to cover the second light emitting element 12, the bonding wire 30 connected to the second light emitting element 12, and the third encapsulant 37a. The fourth encapsulant 37b may contain a phosphor.

In addition, in the light emitting devices 1 and 2, the reflector 13 having a frame-shaped planar shape along the outer edge of the base material 10 is arranged, but in the light emitting device according to the embodiment, the reflector may not be arranged. , along at least a portion of the outer edges of the first light emitting region and the second light emitting region.

11(a) is a plan view of a light emitting device according to the seventh modification, FIG. 11(b) is a plan view of a light emitting device according to the eighth modification, and FIG. 11(c) is a ninth modification. FIG. 11D is a plan view of a light emitting device according to a tenth modified example.

A light-emitting device 7a according to the seventh modification differs from the light-emitting device 1 in that the reflector 13 is not arranged. Since the reflector 13 is not arranged in the light-emitting device 7 a , the outer edges of the first light-emitting region 18 a and the second light-emitting region 18 b are arranged along the outer edge of the base material 10 . The configuration and function of the light-emitting device 7a are the same as those of the light-emitting device 1 except that the reflector 13 is not arranged and the outer edges of the first light-emitting region 18a and the second light-emitting region 18b are arranged along the outer edge of the base material 10. Since the configuration and function are the same as those of , detailed description thereof is omitted here.

A light-emitting device 7b according to the eighth modification differs from the light-emitting device 1 in that a reflective material 13a is arranged instead of the reflective material 13. FIG. The configurations and functions of the constituent elements of the light emitting device 7b other than the reflector 13a are the same as the configurations and functions of the constituent elements of the light emitting device 1 denoted by the same reference numerals, and detailed descriptions thereof are omitted here.

The reflector 13a is arranged along the side opposite to the side extending along the interference prevention member 14 of each of the first light emitting region 18a and the second light emitting region 18b. In addition, the reflector 13a is not arranged on the side orthogonal to the side extending along the interference prevention member 14 of each of the first light emitting region 18a and the second light emitting region 18b. The outer edges of the first light emitting region 18a and the second light emitting region 18b are arranged along the outer edge of the base material 10 on the side perpendicular to the side extending along the interference prevention member 14 where the reflector 13a is not arranged. .

A light-emitting device 7c according to the ninth modification differs from the light-emitting device 1 in that a reflective material 13b is arranged instead of the reflective material 13. FIG. The configurations and functions of the constituent elements of the light emitting device 7c other than the reflector 13b are the same as those of the constituent elements of the light emitting device 1 denoted by the same reference numerals, and therefore detailed description thereof is omitted here.

The reflector 13b is arranged along the side opposite to the side extending along the interference prevention member 14 of each of the first light emitting region 18a and the second light emitting region 18b. In addition, the outer edge of the reflector 13b is located inside the outer edge of the base material 10 on the side perpendicular to the side extending along the interference prevention member 14 of each of the first light emitting region 18a and the second light emitting region 18b. placed in

A light-emitting device 7d according to the tenth modification differs from the light-emitting device 1 in that a reflector 13c is arranged instead of the reflector 13. FIG. The configurations and functions of the constituent elements of the light emitting device 7d other than the reflector 13c are the same as those of the constituent elements of the light emitting device 1 denoted by the same reference numerals, and therefore detailed description thereof is omitted here.

The reflector 13c is perpendicular to the side extending along the interference prevention member 14 along the side opposite to the side extending along the interference prevention member 14 of each of the first light emitting region 18a and the second light emitting region 18b. Arranged up to the outer edge. In addition, the outer edge of the reflector 13c is located inside the outer edge of the base material 10 on the side perpendicular to the sides extending along the interference prevention member 14 of each of the first light emitting region 18a and the second light emitting region 18b. placed in

Further, in the light-emitting devices 1 and 2, a single light-emitting element is mounted in each of the first light-emitting region 18a and the second light-emitting region 18b. A plurality of light emitting elements may be mounted on at least one of the light emitting regions 18b.

FIG. 12(a) is a plan view of a light emitting device according to an eleventh modification, and FIG. 12(b) is a plan view of a light emitting device according to a twelfth modification.

A light-emitting device 8a according to the eleventh modification has a substrate 10c, a second light-emitting element 12a, a third light-emitting element 12b, and a fourth light-emitting element 12c instead of the substrate 10 and the second light-emitting element 12. different from 1. The configurations and functions of the constituent elements of the light-emitting device 8a other than the base material 10c, the second light-emitting element 12a, the third light-emitting element 12b, and the fourth light-emitting element 12c are the same as those of the constituent elements of the light-emitting device 1 denoted by the same reference numerals. Since it is the same as the function, detailed description is omitted here.

The substrate 10c has three second anode wires 23a, 23b and 23c and three second cathode wires 24a, 24b and 24c. Each of the three second anode wirings 23a, 23b and 23c and the three second cathode wirings 24a, 24b and 24c is formed of a conductive thin film such as copper, and is arranged on the back surface of the substrate 10c. and to each of the three cathode electrodes.

The second anode wires 23 a and 23 b and the second cathode wires 24 a and 24 b are arranged close to the interference prevention material 14 . The second anode wiring 23c and the second cathode wiring 24c are arranged farther from the interference prevention material 14 than the second anode wirings 23a and 23b and the second cathode wirings 24a and 24b.

The second light emitting element 12a is a red LED die having a rectangular planar shape, and is mounted on the second cathode wiring 24a by bonding with an insulating die bonding material (not shown). The second light emitting element 12a is connected to the second anode wiring 23a and the second cathode wiring 24a via bonding wires 30, which are linear members made of a conductive material such as gold. The second light emitting element 12a emits red light when a forward voltage is applied to the pair of second anode electrode and second cathode electrode connected to the second anode wiring 23a and the second cathode wiring 24a. do. The dominant wavelength of the red light emitted from the second light emitting element 12a is within the range between 600 nm and 680 nm, and is 660 nm in one example. The second light emitting element 12a is formed by arranging a PN junction layer formed of a gallium aluminum arsenide (GaAlAs) layer on a silicon substrate, which is a substrate that does not transmit light.

The third light emitting element 12b is a green LED die having a rectangular planar shape, and is mounted on the second cathode wiring 24b by bonding with an insulating die bonding material (not shown). The third light emitting element 12b is connected to the second anode wiring 23b and the second cathode wiring 24b via bonding wires 30, which are linear members made of a conductive material such as gold. The third light emitting element 12b emits green light when a forward voltage is applied to the pair of second anode electrode and second cathode electrode connected to the second anode wiring 23b and the second cathode wiring 24b. do. The dominant wavelength of the green light emitted from the third light emitting element 12b is within the range between 500 nm and 570 nm, and is 550 nm in one example. The third light emitting element 12b is formed by laminating a PN junction layer formed of a gallium nitride (GaN) layer on a transparent sapphire substrate.

Like the second light emitting element 12, the fourth light emitting element 12c is a blue LED die having a rectangular planar shape, and is mounted on the second cathode wiring 24c by bonding with an insulating die bonding material (not shown). be. The fourth light emitting element 12c is connected to the second anode wiring 23c and the second cathode wiring 24c via bonding wires 30, which are linear members made of a conductive material such as gold.

In the light-emitting device 8a, the fourth light-emitting element 12c is separated from the interference prevention material 14, so that the fluorescence contained in the first sealing material 15 passes through the interference prevention material 14 from the fourth light-emitting element 12c. The amount of light entering the body can be minimized.

A light-emitting device 8b according to the twelfth modification differs from the light-emitting device 8a in that it has a substrate 10d instead of the substrate 10c. The configurations and functions of the constituent elements of the light-emitting device 8b other than the base material 10d are the same as those of the constituent elements of the light-emitting device 8a to which the same reference numerals are attached, so detailed descriptions thereof are omitted here.

The substrate 10d differs from the substrate 10c in the arrangement of the three second anode wires 23a, 23b and 23c and the three second cathode wires 24a, 24b and 24c. The configuration and functions of the base material 10d are the same as those of the base material 10c, except for the arrangement of the three second anode wirings 23a, 23b and 23c and the three second cathode wirings 24a, 24b and 24c, so detailed descriptions thereof are omitted here. do.

The three second anode wires 23a, 23b and 23c are arranged so as to be separated from the interference prevention member 14 in sequence. Also, the three second cathode wires 24a, 24b, and 24c are arranged side by side with the three second anode wires 23a, 23b, and 23c, respectively, and separated from the interference prevention member 14 in order.

In the light-emitting device 8b, as in the light-emitting device 8a, the fourth light-emitting element 12c is separated from the interference prevention material 14, so that the light emitted from the fourth light-emitting element 12c passes through the interference prevention material 14 and passes through the first sealing material. The amount of light incident on the phosphor contained in the material 15 can be minimized.

Moreover, although the light-emitting devices 1 and 2 have two mounting regions, the first light-emitting region 18a and the second light-emitting region 18b, the light-emitting device according to the embodiment may have three or more light-emitting regions.

13 is a plan view of a light emitting device according to a thirteenth modification, and FIG. 14 is a cross-sectional view taken along line EE shown in FIG.

A light emitting device 8c according to the thirteenth modification has a base material 10e, a fifth light emitting element 12d, a first interference prevention member 14a and a second interference prevention member 14b, a third sealing member 17c and a fourth sealing member 17d. This is different from the light emitting device 8b. The configuration and functions of the light emitting device 8c other than the base material 10e, the fifth light emitting element 12d, the first interference prevention member 14a and the second interference prevention member 14b, the third sealing member 17c and the fourth sealing member 17d are the same as those of the light emitting device. Since the configuration and function are the same as those of 8b, detailed description is omitted here.

The substrate 10e differs from the substrate 10d in that it has a third anode wiring 21a and a third cathode wiring 22a. Further, the base material 10e differs from the base material 10d in that the positions of the second anode wiring 23b and the second cathode wiring 24b are opposite to those of the second anode wiring 23c and the second cathode wiring 24c. The configuration and functions of the base material 10e are the same as those of the base material 10d except for the arrangement positions of the third anode wiring 21a and the third cathode wiring 22a, and the second anode wiring and the second cathode wiring. Description is omitted.

Each of the third anode wiring 21a and the third cathode wiring 22a is formed of a conductive thin film of copper or the like, and the end opposite to the end of the substrate 10e on which the first anode wiring 21 and the first cathode wiring 22 are arranged. placed in the department. Each of the third anode wiring 21a and the third cathode wiring 22a is connected to an anode electrode and a cathode electrode respectively arranged on the rear surface of the substrate 10e.

Like the second light emitting element 12, the fifth light emitting element 12d is a blue LED die having a rectangular planar shape, and is mounted on the third cathode wiring 22a by bonding with an insulating die bonding material (not shown). be. The fifth light emitting element 12d is connected to the second anode wiring 23c and the second cathode wiring 24c via bonding wires 30, which are linear members made of a conductive material such as gold.

The first interference prevention member 14a, like the interference prevention member 14, is a white resin formed by containing white particles such as titanium oxide in a transparent resin such as silicone resin. The first interference prevention member 14a is arranged such that its bottom engages with a first recess 10f formed between the first light emitting region 18a and the second light emitting region 18b.

The second interference prevention member 14b is a white resin formed by containing white particles such as titanium oxide in a transparent resin such as silicone resin, like the first interference prevention member 14a. The second interference prevention member 14b is arranged so that the bottom engages with the second recess 10g formed between the second light emitting region 18b and the third light emitting region 18c.

The _third encapsulant 17c is made of a transparent resin such as silicone resin, similarly to the third encapsulant 17a. contains. The third sealing member 17c is arranged along the extension direction of the second interference prevention member 14b so as to cover the entire third light emitting region 18c, and is connected to the fifth light emitting element 12d and the bonding connected to the fifth light emitting element 12d. Part or all of the wire 30 is sealed. The third sealing member 17c has a substantially fan-shaped cross-sectional shape that rises with increasing distance from the second light emitting region 18b and curves in a convex shape. The third light emitting region 18 c emits red light emitted from the phosphor contained in the third sealing material 37 a in response to blue light emitted from the second light emitting element 12 .

The fourth encapsulant 17d is made of transparent resin such as silicone resin, and is arranged to cover the entire third light emitting region 18c. The fourth encapsulant 17d is arranged to cover the fifth light emitting element 12d, the bonding wire 30 connected to the fifth light emitting element 12d, and the third encapsulant 17c.

Further, although the light emitting devices 1 to 8c described above are planar light emitting devices, the light emitting device according to the embodiment may be a side light emitting device.

15 is a perspective view of a light emitting device according to a fourteenth modification, FIG. 16(a) is a front view of the light emitting device shown in FIG. 15, and FIG. 16(b) is a rear view of the light emitting device shown in FIG. , and FIG. 16C is a plan view of the light emitting device shown in FIG. 16(d) is a bottom view of the light emitting device shown in FIG. 15, and FIG. 16(e) is a side view of the light emitting device shown in FIG.

A light-emitting device 9a according to the fourteenth modification includes a substrate 50, a reflector 53, an interference prevention member 54, a first sealing member 55, and a second sealing member 56. , the first encapsulant 15, the second encapsulant 16, and the third encapsulant 17, respectively. Further, the light-emitting device 9a differs from the light-emitting device 1 in that it has an electrode base material 60 . The configuration and function of the constituent elements of the light emitting device 9a other than the base material 50, the reflector 53 to the second sealing member 56, and the electrode base material 60 are the same as those of the constituent elements of the light emitting device 1 denoted by the same reference numerals. Since they are the same, detailed description is omitted here.

The base material 50 and the reflecting material 53 to the second sealing material 56 are different from the base material 10 and the reflecting material 13 to the third sealing body 17 in the length in the extending direction of the interference prevention material 54 . The configurations and functions of the base material 50 and the reflector 53 to the second sealing material 56 other than the length in the extending direction of the interference prevention material 54 are the same as the configurations and functions of the base material 10 and the reflector 13 to the third sealing body 17. , so detailed description is omitted here.

The electrode base material 60 has a base 61 , a first side electrode 62 , a second side electrode 63 and a third side electrode 64 . The base 61 is made of synthetic resin having high hardness such as polyimide resin, and is connected to the back surface of the base material 50 via an adhesive member such as an adhesive sheet.

The first side electrode 62, the second side electrode 63, the third side electrode 64, and the like are formed of a conductive material such as copper, and extend along the surface of the reflector 53 extending in the longitudinal direction on the side of the first light emitting region 58a. placed. The first side electrode 62 is connected to the first anode electrode 26 and the second anode electrode 28, the second side electrode 63 is connected to the first cathode electrode 27, and the third side electrode 64 is connected to the second cathode electrode 29. be.

When the forward voltage of the first light emitting element 11 is applied between the first side electrode 62 and the second side electrode 63, the first light emitting element 11 emits light, and white light is emitted from the first light emitting region 58a. Light is emitted. When the forward voltage of the second light emitting element 12 is applied between the first side electrode 62 and the third side electrode 64, the second light emitting element 12 emits light, and blue light is emitted from the second light emitting region 58b. Light is emitted.

17 is a perspective view of a light emitting device according to a fifteenth modification, FIG. 18(a) is a front view of the light emitting device shown in FIG. 17, and FIG. 18(b) is a rear view of the light emitting device shown in FIG. , and FIG. 18C is a plan view of the light emitting device shown in FIG. 18D is a bottom view of the light emitting device shown in FIG. 17, and FIG. 18E is a side view of the light emitting device shown in FIG.

The light emitting device 9b differs from the light emitting device 9a in that it has a reflector 73, an interference prevention member 74 and a second sealing member 76 instead of the reflector 53, the interference prevention member 54 and the second sealing member 56. FIG. The configurations and functions of the constituent elements of the light emitting device 9b other than the reflector 73, the interference prevention member 74, and the second sealing member 76 are the same as those of the constituent elements of the light emitting device 9a denoted by the same reference numerals. A detailed description is omitted here.

The reflector 73, the interference prevention member 74, and the second sealing member 76 have the length in the extending direction of the interference prevention member 74. 34 and second sealing material 36 and third sealing material 37 . The configurations and functions of the reflector 73, the interference prevention member 74, and the second sealing member 76 other than the length in the extending direction of the interference prevention member 74 are the same as those of the reflection member 33, the interference prevention member 34, and the second sealing member of the light emitting device 2. Since the structure and function are the same as those of the material 36, detailed description is omitted here.

The light emitting device according to the embodiment may have the following aspects.
(1) A light-emitting device in which the first sealing material is arranged so as to be in contact with the reflective material.
(2) The separation distance between the side of the second light emitting region that faces the side extending along the second light emitting element and the interference prevention material is the side of the second light emitting region that extends along the second light emitting element and the interference prevention material. A light-emitting device that is shorter than the separation distance between
(3) A light-emitting device, wherein the interference prevention material is made of a light-absorbing material that absorbs light emitted from the first light-emitting region and the second light-emitting region.
(4) The light-emitting device, wherein the interference prevention material includes a white resin arranged in the second light-emitting region so as to surround the second light-emitting element.
(5) The light-emitting device, wherein the height of the upper end of the interference prevention material is higher than the height of the surface of the second light-emitting element.
(6) The height of the interference prevention material is lower than the height of the reflector,
A light-emitting device, wherein a groove whose bottom surface is in contact with the upper end of the interference prevention member is formed above the interference prevention member.
(7) The light-emitting device, wherein the first encapsulant is positioned below a tangent line of the interference prevention material that passes through the surface of the second light-emitting element.

1 to 9b Light emitting device 10, 10c, 10d, 10e, 40, 50 Base material 11 First light emitting element 12 Second light emitting element 13, 13a, 13b, 33, 53, 73 Reflective material 14, 34, 44 to 47, 54 , 74 Interference prevention material 15, 55 First sealing material 16, 36, 56, 76 Second sealing material 17, 17a, 17c, 37, 37a
60 electrode base material

Claims (14)

a substrate having a first light-emitting region and a second light-emitting region adjacent to the first light-emitting region on a surface, and having an anode electrode and a cathode electrode disposed on the opposite side of the surface;
a first light emitting element mounted in the first light emitting region;
a second light emitting element mounted in the second light emitting region;
An interference prevention material disposed between the first light emitting region and the second light emitting region to prevent interference between light emitted from the first light emitting region and light emitted from the second light emitting region. and,
a first encapsulant that contains a phosphor, covers the first light emitting element, and is arranged to reach the outer edge of the first light emitting region;
a second encapsulant arranged to cover the first light emitting element and the first encapsulant;
a third encapsulant arranged to cover the second light emitting element;
The height of the first encapsulant is directly above the top surface of the first light emitting element and increases with increasing distance from the second light emitting region.
A light-emitting device characterized by: 2. The light-emitting device of claim 1, further comprising a reflective material disposed along at least a portion of outer edges of each of the first light-emitting region and the second light-emitting region. Each of the first light emitting region and the second light emitting region has a rectangular planar shape with one side extending along the interference prevention material,
3. The light-emitting device according to claim 2, wherein the reflector is arranged along a side of each of the first light-emitting region and the second light-emitting region that faces the side extending along the anti-interference member. The second sealing material and the third sealing material are made of the same resin,
4. The light-emitting device according to claim 2, wherein both said second encapsulant and said third encapsulant do not contain a phosphor. further comprising a fourth encapsulant arranged to cover the second light emitting element and the third encapsulant;
the third encapsulant contains a phosphor different from the phosphor contained in the first encapsulant,
4. The light-emitting device according to claim 2, wherein the height of said third encapsulant immediately above the upper surface of said second light-emitting element increases with increasing distance from said first light-emitting region. The separation distance of the side of the first light emitting region facing the side extending along the first light emitting element and the interference prevention member is the first light emitting element extending along the first light emitting element and the interference prevention member. The light-emitting device according to any one of claims 1 to 5, which is shorter than the separation distance between the sides of the region. The light emitting device according to any one of claims 2 to 6, wherein the height of said anti-interference material is equal to the height of said reflector. The base material has a notch formed along the outer edge,
The light emitting device according to any one of claims 2 to 7, wherein the bottom of said reflector is engaged with said notch. the substrate has a recess formed between the first light emitting region and the second light emitting region;
The light emitting device according to any one of claims 2 to 8, wherein the bottom of said interference prevention material is engaged with said recess. 10. The light emitting device according to claim 2, wherein said interference prevention material is formed of a light reflecting material that reflects light emitted from said first light emitting region and said second light emitting region.
The light emitted from the first light emitting region is white light,
The light-emitting device according to any one of claims 2 to 10, wherein the second light-emitting element emits blue light. a third light emitting element mounted in the second light emitting region and emitting red light;
a fourth light emitting element that is mounted in the second light emitting region and emits green light;
12. The light emitting device according to claim 11, wherein said second light emitting element is arranged further away from said interference prevention material than said third light emitting element and said fourth light emitting element. 13. The light-emitting device according to claim 2, wherein the surface of the first encapsulant in contact with the interference prevention material is lower than the upper surface of the second light-emitting element. the anode electrode and the cathode electrode are further disposed on a side surface adjacent to the surface;
The light-emitting device according to any one of claims 2 to 13, wherein the anode electrode and the cathode electrode are arranged on opposite sides of the surface along the extension direction of the reflector.

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