JP2023051717A - Light-emitting device - Google Patents

Abstract

To provide a light-emitting device which can extract light in a front direction with high efficiency, and enables miniaturization.SOLUTION: A light-emitting device includes: a resin package having a first recess, a second recess and a third recess in a main surface; a first light-emitting element, a second light-emitting element and a third light-emitting element arranged on each of the first recess to the third recess; a first reflective member, a second reflective member and a third reflective member arranged on each of the first recess to the third recess, and positioned in the peripheries of the corresponding light-emitting elements in plan view; and a mold resin part including a first lens part to a third lens part which are positioned above the first light-emitting element to the third light-emitting element and have convex shapes projecting upward from the main surface side, wherein in plan view, the maximum width of the first lens part is smaller than the maximum width of an inner top face of the first recess, the maximum width of the second lens part is smaller than the maximum width of an inner top face of the second recess, and the maximum width of the third lens part is smaller than the maximum width of an inner top face of the third recess.SELECTED DRAWING: Figure 2C

Description

The present disclosure relates to light emitting devices.

As light-emitting devices such as light-emitting diodes (LEDs), bullet-type (lamp-type) light-emitting devices, surface-mounted (SMD-type) light-emitting devices, and the like are known. Since the lamp-type light emitting device has a high light distribution in the front direction, it is suitably used in a large display device such as an LED display in which the light emitting devices are arranged as pixels in a matrix.

Patent Document 1 and Patent Document 2 describe a surface-mountable light-emitting device having a lens on the light-emitting surface side.

JP-A-2006-93435 U.S. Patent No. 2020/0176643

A non-limiting exemplary embodiment of the present disclosure provides a light-emitting device capable of extracting light in a front direction with high efficiency and capable of being miniaturized.

A light emitting device according to an embodiment of the present disclosure is a resin package including a plurality of leads and a resin member fixing at least part of the plurality of leads, wherein the resin package includes the resin member and the plurality of leads. a plurality of recesses including a first recess, a second recess and a third recess defined by the leads of the main surface, and inner upper surfaces of each of the first recess, the second recess and the third recess is a resin package including an exposed area where any one of the plurality of leads is exposed; a first light emitting element arranged in the exposed area of the first recess; A second light emitting element arranged, a third light emitting element arranged in the exposed region of the third recess, and a third light emitting element arranged in the first recess and positioned around the first light emitting element in plan view 1 reflective member, a second reflective member arranged in the second recess and positioned around the second light emitting element in plan view, and a second reflective member arranged in the third recess and arranged in the third light emitting element in plan view a third reflective member positioned on the periphery of the, a first lens portion positioned above the first light emitting element, a second lens portion positioned above the second light emitting element, and the third light emitting element A mold resin portion including a third lens portion positioned above, wherein each of the first lens portion, the second lens portion, and the third lens portion has a convex shape projecting upward from the main surface side. and a mold resin portion, wherein in plan view, the maximum width of the first lens portion is smaller than the maximum width of the inner upper surface of the first concave portion, and the maximum width of the second lens portion is less than the maximum width of the The maximum width of the inner upper surface of the second concave portion is smaller than the maximum width of the inner upper surface of the second concave portion, and the maximum width of the third lens portion is smaller than the maximum width of the inner upper surface of the third concave portion.

A light-emitting device according to another embodiment of the present disclosure is a resin package including a plurality of leads and a resin member fixing at least part of the plurality of leads, wherein the resin package includes the resin member and the a first region, a second region, and a third region defined by a plurality of leads, wherein each of the first region, the second region, and the third region is one of the plurality of leads; a resin package, a first light emitting element arranged in the exposed area of the first area, a second light emitting element arranged in the exposed area of the second area; and , a third light emitting element arranged in the exposed region of the third region; a first reflective member arranged in the first region and positioned around the first light emitting device in plan view; a second reflective member located in the periphery of the second light emitting element in plan view, and a third reflective member located in the third region and located in the periphery of the third light emitting element in plan view a member, a first lens portion positioned above the first light emitting element, a second lens portion positioned above the second light emitting element, and a third lens portion positioned above the third light emitting element; wherein each of the first lens portion, the second lens portion, and the third lens portion has a convex shape protruding upward from the main surface side; , in a section including a line connecting the vertex of the first lens section and the center point of the first lens section in a plan view, in which the width of the first lens section is the smallest, The width is five times or less than the width of the first light emitting element, and the second lens in the cross section including the line connecting the vertex of the second lens portion and the center point of the second lens portion in plan view In the cross section where the width of the portion is the smallest, the width of the second lens portion is five times or less the width of the second light emitting element, and the vertex of the third lens portion and the third lens portion in plan view Of the cross sections including the line connecting the center point, the width of the third lens part is 5 times or less the width of the third light emitting element in the cross section where the width of the third lens part is the smallest.

According to the embodiments of the present disclosure, it is possible to provide a light emitting device capable of extracting light in the front direction with high efficiency and capable of being miniaturized.

FIG. 1 is a schematic perspective view of one embodiment of a light emitting device according to the present disclosure. FIG. 2A is a schematic side view of the light emitting device shown in FIG. 1 as seen from the y-axis direction. FIG. 2B is a schematic side view of the light emitting device shown in FIG. 1 when viewed from the x-axis direction. 2C is a schematic top view of the light emitting device shown in FIG. 1. FIG. FIG. 2D is a schematic cross-sectional view taken along line 2D-2D shown in FIG. 2C. FIG. 2E is a schematic cross-sectional view along line 2E-2E shown in FIG. 2C. FIG. 2F is a schematic top perspective view showing the resin package 100 in which the light emitting element 50 is formed. FIG. 2G is a schematic cross-sectional view along line 2G-2G shown in FIG. 2F. FIG. 2H is an enlarged plan view showing a reflective member and a light emitting element; FIG. 2I is a diagram showing an example in which a precoat resin is provided in a light emitting device, and is a schematic cross-sectional view taken along line 2D-2D shown in FIG. 2C. FIG. 2J is a diagram showing an example in which a precoat resin is provided in the light emitting device, and is a schematic cross-sectional view taken along line 2E-2E shown in FIG. 2C. FIG. 3A is a plan view showing another example of a light emitting device. FIG. 3B is a cross-sectional view along line 3B-3B shown in FIG. 3A. FIG. 4 is a schematic top view showing another light emitting device of the present disclosure. FIG. 5A is a schematic cross-sectional view for explaining light entering a lens portion from a light-emitting element in a light-emitting device of a comparative example. FIG. 5B is a schematic cross-sectional view for explaining light incident on the lens portion from the light emitting element in the light emitting device of the comparative example. FIG. 5C is a schematic cross-sectional view for explaining light incident on the lens portion from the light emitting element in the light emitting device of the comparative example. FIG. 5D is a schematic cross-sectional view for explaining light incident on the lens portion from the light emitting element in the light emitting device of the comparative example. FIG. 5E is a schematic cross-sectional view for explaining light incident on the lens portion from the light emitting element in the light emitting device of the example. FIG. 6 is a diagram showing the relationship between the size ratio WS/w1 of the lens portion to the light emitting element and the luminous flux ratio. 7A is a schematic top view of a light-emitting device of Modification 1. FIG. FIG. 7B is a schematic cross-sectional view along line 7B-7B shown in FIG. 7A. 8A is a schematic top perspective view of a light-emitting device of Modification 2. FIG. FIG. 8B is a schematic cross-sectional view taken along line 8B-8B shown in FIG. 8A. FIG. 8C is an enlarged cross-sectional view showing a portion of the cross section shown in FIG. 8B. FIG. 9 is a schematic top perspective view of a light-emitting device of Modification 3. FIG. 10A is a schematic top perspective view of a light-emitting device of Modification 4. FIG. FIG. 10B is a schematic cross-sectional view along line 10B-10B shown in FIG. 10A. 11A is a schematic top perspective view of another light-emitting device of Modification 4. FIG. 11B is a schematic top view of still another light-emitting device of Modification 4. FIG. 11C is a schematic top view of still another light-emitting device of Modification 4. FIG. 12A is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 1. FIG. 12B is a process cross-sectional view showing a method of manufacturing the light-emitting device shown in FIG. 1. FIG. 12C is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 1. FIG. FIG. 12D is an enlarged cross-sectional view for explaining the process shown in FIG. 12C. 12E is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 1. FIG. 12F is a process cross-sectional view showing a method of manufacturing the light-emitting device shown in FIG. 1. FIG. FIG. 13 is a schematic side view of another light emitting device. FIG. 14 is a schematic perspective view of a light-emitting device according to another embodiment of the present disclosure with the mold resin portion removed. 15A is a schematic top perspective view of the light emitting device shown in FIG. 14. FIG. FIG. 15B is a schematic cross-sectional view taken along line 15B-15B shown in FIG. 15A. FIG. 15C is a schematic cross-sectional view taken along line 15C-15C shown in FIG. 15A. 15D is an enlarged plan view showing part of the main surface of the resin package of the light emitting device shown in FIG. 14. FIG. 15E is an enlarged perspective view showing part of the main surface of the resin package of the light emitting device shown in FIG. 14. FIG. FIG. 16 is a schematic perspective view of a light emitting device according to Modification 5 from which the mold resin portion is removed. 17A is a schematic top perspective view of the light emitting device shown in FIG. 16. FIG. FIG. 17B is a schematic cross-sectional view taken along line 17B-17B shown in FIG. 17A. FIG. 17C is a schematic cross-sectional view taken along line 17C-17C shown in FIG. 17A. 17D is an enlarged plan view showing part of the main surface of the resin package of another light emitting device of Modification 5. FIG. 17E is an enlarged plan view showing part of the main surface of the resin package of another light emitting device of Modification 5. FIG. FIG. 18 is a schematic perspective view of a light emitting device according to Modification 5 from which the mold resin portion is removed. 19A is a schematic top perspective view of the light emitting device shown in FIG. 18. FIG. FIG. 19B is a schematic cross-sectional view taken along line 19B-19B shown in FIG. 19A. FIG. 19C is a schematic cross-sectional view taken along line 19C-19C shown in FIG. 19A. 19D is an enlarged plan view showing part of the main surface of the resin package of another light emitting device according to Modification 6. FIG. 19E is an enlarged perspective view showing part of the main surface of the resin package of another light emitting device of Modification 6. FIG. 19F is an enlarged plan view showing part of the main surface of the resin package of another light emitting device according to Modification 6. FIG. FIG. 20 is a schematic perspective view of a light emitting device according to Modification 7 from which the mold resin portion is removed. 21 is an enlarged plan view showing part of the main surface of the resin package of the light emitting device shown in FIG. 20. FIG. FIG. 22 is a schematic perspective view of a light-emitting device according to Modification 8, from which the mold resin portion is removed. 23 is an enlarged plan view showing part of the main surface of the resin package of the light emitting device shown in FIG. 22. FIG. FIG. 24 is a schematic perspective view of the light emitting device of the embodiment of Modification 9 with the mold resin portion removed. 25 is an enlarged view showing part of the main surface of the resin package of the light emitting device shown in FIG. 24. FIG. FIG. 26 is a schematic perspective view of a light-emitting device according to the tenth embodiment from which the mold resin portion is removed. 27 is an enlarged view showing part of the main surface of the resin package of the light emitting device shown in FIG. 26. FIG. FIG. 28 is a schematic perspective view of a light emitting device according to Modification 11 from which the mold resin portion is removed. 29A is a schematic top perspective view of the light emitting device shown in FIG. 28. FIG. FIG. 29B is a schematic cross-sectional view taken along line 29B-29B shown in FIG. 29A. 29C is a schematic cross-sectional view taken along line 29C-29C shown in FIG. 29A. 29D is an enlarged perspective view showing part of the main surface of the resin package of the light emitting device shown in FIG. 28. FIG. 30A is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 14. FIG. 30B is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 14. FIG. 30C is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 14. FIG. 30D is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 14. FIG. 30E is a process cross-sectional view showing a method of manufacturing the light emitting device shown in FIG. 14. FIG. 31A is a schematic top perspective view of a light-emitting device of Modification 12. FIG. FIG. 31B is a schematic cross-sectional view taken along line 31B-31B shown in FIG. 31A. 32A is a schematic plan view illustrating the emission luminance distribution of the first light emitting element 51. FIG. 32B is a schematic plan view illustrating the light emission luminance distribution of the third light emitting element 53. FIG. FIG. 33 is a plan view showing the layout of a reference example of the first to third light emitting elements 51 to 53. FIG. 34 is a plan view showing the arrangement of the first to third light emitting elements 51 to 53 in the light emitting device shown in FIG. 31A. FIG. 35 is a plan view showing another arrangement example of the first to third light emitting elements 51 to 53. FIG. FIG. 36A is a side view illustrating the arrangement of lens units. FIG. 36B is a side view showing another example of the arrangement of lens units. FIG. 36C is a side view showing still another example of the arrangement of lens units. FIG. 37 is a schematic cross-sectional view of another light-emitting device of modification 12. FIG. FIG. 38 is a schematic perspective view of the light emitting device of Modification 13 from which the mold resin portion is removed. 39A is a schematic top view of the light emitting device shown in FIG. 38. FIG. 39B is a schematic cross-sectional view taken along line 39B-39B shown in FIG. 39A. Figure 39C is a schematic cross-sectional view taken along line 39C-39C shown in Figure 39A. 39D is an enlarged top view showing part of the light emitting device shown in FIG. 38. FIG. FIG. 40 is a schematic perspective view of another light emitting device of Modification 13 from which the mold resin portion is removed. FIG. 41 is a schematic perspective view of still another light emitting device of Modification 13 from which the mold resin portion is removed.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings as appropriate. However, the light-emitting device described below is for embodying the technical idea of the present disclosure, and unless there is a specific description, the present disclosure is not limited to the following. Moreover, the content described in one embodiment can also be applied to other embodiments and modifications. Furthermore, the sizes and positional relationships of members shown in the drawings may be exaggerated for clarity of explanation.

In the following description, constituent elements having substantially the same functions are denoted by common reference numerals, and their description may be omitted. Alternatively, components not referred to in the description may not be numbered. The following description may use terms (eg, "upper", "lower", "right", "left" and other terms that include those terms) that indicate particular directions or positions. However, these terms are used only for clarity of relative orientation or position in the referenced drawings. If the relative direction or positional relationship of terms such as “upper” and “lower” in the referenced drawings is the same, drawings other than the present disclosure, actual products, manufacturing equipment, etc. are the same as the referenced drawings. It does not have to be placement. In the present disclosure, "parallel" includes cases where two straight lines, sides, planes, etc. are in the range of about 0° to ±5°, unless otherwise specified. In the present disclosure, "perpendicular" or "perpendicular" includes cases where two straight lines, sides, planes, etc. are in the range of about 90° to ±5° unless otherwise specified.

When describing a direction with reference to an axis, if it is important whether the axis is in the + direction or the - direction with respect to the reference, then the + and - directions of the axis will be distinguished and explained. Therefore, the direction toward the + side of the x-axis is called the "+x direction", and the direction toward the - side of the x-axis is called the "-x direction". Similarly, the direction toward the + side of the y-axis and z-axis is called "+y direction" and "+z direction", and the direction toward the - side of y-axis and z-axis is called "-y direction" and "-z direction". call. On the other hand, when the direction along which axis is important and whether it is in the + or - direction of the axis is irrelevant, the term "axial direction" is simply used. A plane including the x-axis and the y-axis is called an "xy-plane", a plane including the x-axis and the z-axis is called an "xz-plane", and a plane including the y-axis and the z-axis is called a "yz-plane".

(First embodiment)
FIG. 1 is a schematic perspective view of a first embodiment light emitting device 1000 according to the present disclosure.

FIG. 1 also shows arrows indicating mutually orthogonal x-, y-, and z-axes. Arrows indicating these directions may also be illustrated in other drawings of the present disclosure. In the configuration illustrated in FIG. 1, the external shape of the light emitting device 1000 when viewed from above has a substantially rectangular shape. Each side of the rectangular outline is parallel to the x-axis or y-axis shown in the figure. The z-axis is perpendicular to the x- and y-axes. Note that the outer shape of the light-emitting device 1000 when viewed from above does not have to be rectangular.

FIG. 2A is a schematic side view of the light emitting device 1000 when viewed from the y-axis direction, and FIG. 2B is a schematic side view of the light emitting device 1000 when viewed from the x-axis direction. FIG. 2C is a schematic top view of the light emitting device 1000. FIG. 2D and 2E are schematic cross-sectional views taken along lines 2D-2D and 2E-2E, respectively, shown in FIG. 2C.

As shown in FIGS. 2C to 2E, the light emitting device 1000 includes a resin package 100, a plurality of light emitting elements 50, a plurality of reflective members 150, and a mold resin portion 60 including a plurality of lens portions .

Resin package 100 includes a plurality of leads 11a-13b and a resin member. In this embodiment, the resin member is, for example, a dark-colored resin member 40 made of dark-colored resin. The resin member may be entirely made of dark-colored resin. Further, the resin member may be made of a dark-colored resin at least at the portion exposed on the main surface 100a of the resin package 100 in plan view. Resin package 100 has a plurality of recesses 20 including first recess 21 , second recess 22 and third recess 23 . Each recess 20 is defined by a plurality of leads 11a-13b and a dark resin member 40. As shown in FIG. The inner upper surface of each recess 20 includes an exposed region 30 where any one of the plurality of leads 11a-13b is partially exposed.

Each of the plurality of light emitting elements 50 is arranged in the exposed region 30 exposed in one corresponding recess 20 . The plurality of light emitting elements 50 includes a first light emitting element 51 arranged in the first recess 21, a second light emitting element 52 arranged in the second recess 22, and a third light emitting element 53 arranged in the third recess 23. and including.

Each of the plurality of reflective members 150 is arranged within one corresponding recess 20 . In plan view, each reflective member 150 is positioned around the light emitting element 50 in the recess 20 .

The plurality of lens portions 70 are a first lens portion 71 and a second lens portion 72 positioned above the first light emitting element 51, the second light emitting element 52, and the third light emitting element 53 (light emission side, +z direction), respectively. and a third lens portion 73 . Each of the plurality of lens portions 70 has a convex shape protruding upward from the principal surface 100a side of the resin package 100 .

In this embodiment, a lens portion 70 is provided on the emission side of each light emitting element 50 . As a result, light can be extracted in the front direction (+z direction) with high efficiency, so that the light emitting device 1000 with high luminance can be obtained. In addition, by arranging the reflective member 150 around the light emitting element 50 in plan view in the z-axis direction, the light emitted from the light emitting element 50 can be made into a point light source. A point light source refers to a state in which 10% or less of the light is emitted from the side surface of the light emitting element 50 . As a result, the size of the lens portion 70 can be reduced, so that the size of the light emitting device 1000 can be reduced.

As shown in FIG. 2C , the maximum width of each lens portion 70 is, for example, smaller than the maximum width of the inner upper surface of the corresponding recessed portion 20 in plan view in the z-axis direction. That is, in plan view, the maximum width of the first lens portion 71 is smaller than the maximum width of the inner upper surface of the first concave portion 21 . Similarly, the maximum width of the second lens portion 72 is smaller than the maximum width of the inner upper surface of the second concave portion 22, and the maximum width of the third lens portion 73 is smaller than the maximum width of the inner upper surface of the third concave portion 23. . In this specification, the “lens portion” is a convex portion having an optical function, and the “maximum width of the lens portion” is the maximum length passing through the optical axis (center) of the lens portion in plan view. . In FIG. 2C, the position of the optical axis of the lens portion 70 is indicated by the center point C1. The center point C1 of the lens portion 70 in plan view is the figure defined by the lens portion 70 in plan view, that is, the figure defined by the outer shape of the lens portion 70 (the bottom surface of the lens portion 70 indicated by the dashed line in FIG. 2E ). the center of the corresponding virtual surface figure). For example, as shown in the figure, when the planar shape of the lens portion is elliptical, the maximum width is the length WL of the major axis of the ellipse. If the planar shape of the lens portion is circular, the maximum width is the diameter of the circle.

Further, as shown in FIG. 2E, among cross sections including a line 71L connecting the vertex T1 of the first lens portion 71 and the center point C1 of the first lens portion 71 in plan view (here, coinciding with the optical axis), the In the first section where the width of one lens portion 71 is the smallest, the width of the first lens portion 71 (length WS in this example) is five times the width of the first light emitting element 51 (length w1 in this example). It may be below. Similarly, among the cross sections including the line 72L connecting the vertex T2 of the second lens portion 72 and the center point C2 of the second lens portion 72 in plan view, the width of the second lens portion 72 is the smallest in the second cross section , the width of the second lens portion 72 may be less than or equal to five times the width of the second light emitting element 52 . Among cross sections including the line 73L connecting the vertex T3 of the third lens portion 73 and the center point C3 of the third lens portion 73 in a plan view, the width of the third lens portion 73 is the smallest in the third cross section. The width of the lens portion 73 is five times or less the width of the third light emitting element 53 . When the first lens portion 71 to the third lens portion 73 are elliptical or circular in plan view, the center points C1 to C3 are the centers of the ellipse or circle. In this example, the first to third cross sections are all cross sections (parallel to the yz plane) shown in FIG. 2E. In FIG. 2E, the center point C1 of the lens portion 70 in plan view is shown at the same height as the height of the base portion 61 described later in the z-axis direction. For example, when the lens portion 70 is elliptical in plan view, the width of the lens portion 70 (that is, the length WS of the elliptical minor axis) is the same as that of the light emitting element 50 in the cross section including the minor axis of the elliptical shape. It should be 5 times or less than the width. When the lens portion 70 is circular in plan view, the width of the lens portion 70 (that is, the length of the diameter of the circle) is 5 times or less the width of the light emitting element 50 in any cross section including the diameter of the circle. If it is Also, the height in the z-axis direction from the vertex of each lens portion 70 to the upper surface of the light emitting element 50 is, for example, about 0.9 mm.

In the present embodiment, in a side view from one of the x-axis direction and the y-axis direction (here, the y-axis direction), among the first light emitting element 51, the second light emitting element 52, and the third light emitting element 53, overlap each other. In a side view from the x-axis direction perpendicular to the y-axis direction, the maximum width of each lens portion 70 may be five times or less the maximum width of the corresponding light emitting element 50 . Further, when the light emitting device 1000 is viewed in plan, the maximum width of each lens portion 70 in the direction in which at least two light emitting elements 50 overlap in side view (here, the y-axis direction) is the same as that of the corresponding light emitting element 50. may be 5 times or less of the maximum width of With such a configuration, the light emitting device 1000 can be further miniaturized.

Note that “planar view” refers to a plan view seen from the +z-axis direction. A “top view” refers to a top view seen from the +z-axis direction. "Side view" refers to a side view seen from a direction orthogonal to one of the side surfaces of the outer shape of the light emitting device in plan view. "At least two light emitting elements overlap each other in a side view" may include not only the case where these light emitting elements overlap completely but also the case where these light emitting elements overlap partially. For example, when viewed from the side, the case where the center of a certain light emitting element overlaps with another light emitting element is also included. In addition, the size and shape of each light emitting element in a side view may be the same or may be different from each other.

In the illustrated example, three light emitting elements 50 overlap each other in a side view from the y-axis direction. Each lens portion 70 has an elliptical planar shape with a major axis in the x-axis direction and a minor axis in the y-axis direction. It is the length WS of the minor axis. Each light-emitting element 50 has a rectangular planar shape with sides parallel to the x-axis and y-axis, so the maximum width of each light-emitting element 50 in a side view from the x-axis direction is is the length w1. In this case, the length WS of the minor axis of the lens portion 70 may be five times or less the length w1 of the side of the light emitting element 50 .

Each component will be described in detail below.

[Resin package 100]
In this embodiment, the resin package 100 is a surface mount type package.

FIG. 2F is a schematic top view showing the resin package 100 in which the light emitting element 50 is formed, showing the structure of the light emitting device 1000 from which the mold resin portion 60 and the reflective member 150 are removed. FIG. 2G is a schematic cross-sectional view along line 2G-2G shown in FIG. 2F.

As shown in FIGS. 2F and 2G, the resin package 100 has a main surface 100a, a back surface 100b opposite to the main surface 100a, and side portions 100c to 100f located between the main surface 100a and the back surface 100b. have. Sides 100c-100f are located on the +y side, -y side, +x side and -x side, respectively. The back surface 100b of the resin package 100 includes mounting surfaces for the leads 11a to 13b when fixing the light emitting device 1000 to the mounting substrate. The back surface 100b is parallel to the xy plane. The mounting surfaces of the leads 11a-13b may be parallel to the xy plane.

The resin package 100 includes a plurality of leads 11a-13b and a dark resin member 40 fixing at least a portion of the plurality of leads 11a-13b. The dark-colored resin member 40 is integrally formed with the plurality of leads 11a-13b.

In the illustrated configuration, the main surface 100a of the resin package 100 has a rectangular shape when viewed from above. Each side of the quadrangular main surface 100a is parallel to the x-axis or the y-axis. Note that the shape of the main surface 100a in top view may have a shape other than a quadrangle, for example, a substantially triangular shape, a substantially rectangular shape, a substantially pentagonal shape, a substantially hexagonal shape, a polygonal shape, a circular shape, or an elliptical shape. It may have a shape with a curve such as .

[Recess 20]
As shown in FIGS. 2F and 2G, each of the plurality of recesses 20 is defined by an inner upper surface 20a and an inner surface 20c surrounding the inner upper surface 20a. An inner upper surface 20a of the recess 20 is an upward surface (a surface facing the +z side). The inner upper surface 20 a is, for example, the bottom surface (inner upper surface) of the recess 20 . The inner upper surface 20a of each concave portion 20 is located above the inner upper surface 20a in plan view, and is surrounded by a surface or a ridge made of the dark-colored resin member 40. As shown in FIG. In this example, in plan view, the inner upper surface 20a of each recess 20 is surrounded by the upper surface of the second resin portion 42, which will be described later.

A portion of one of the plurality of leads 11a to 13b and the dark-colored resin member 40 are exposed on the inner upper surface 20a of each recess 20. As shown in FIG. The inner side surface 20c of the recess 20 is made of, for example, a dark-colored resin member 40. As shown in FIG. The inner side surface 21c (here, side surfaces s1 and s2) of the first recess 21 may be perpendicular to the inner upper surface 21a of the first recess 21, or may be inclined with respect to the vertical surface of the inner upper surface 21a. .

As shown in FIG. 2G, the inner upper surface 20a of each recess 20 includes an element mounting region dr in which the corresponding light emitting element 50 is arranged. The inner upper surface 20a of each recess 20 may further include connection regions wr1 and wr2 to which wires for electrically connecting the light emitting element 50 and any of the leads 11a to 13b are joined.

As shown in FIG. 2F , in this embodiment, the plurality of recesses 20 includes first recesses 21 , second recesses 22 and third recesses 23 . In the illustrated example, the first to third recesses 21 to 23 are arranged in one direction (the y-axis direction in this example) in plan view. Each concave portion 20 has an oval shape elongated in the x-axis direction. Note that the arrangement and planar shape of each recess 20 are not limited to the illustrated example. The recess 20 may be oval, rectangular, or the like, for example.

The inner upper surface 20a of each recess 20 preferably has a shape elongated in one direction. The width PL in the longitudinal direction (x-axis direction in this example) of each inner upper surface 20a may be, for example, 1.5 times or more the width PS in the lateral direction (y-axis direction in this example). When the planar shape of the inner upper surface 20a is oval or elliptical, the width PL in the longitudinal direction is the maximum width of the inner upper surface 20a. The width in the longitudinal direction of the inner upper surface 20a of each of the first concave portion 21 to the third concave portion 23 is larger than the maximum width of each of the first lens portion 71 to the third lens portion 73 in the longitudinal direction of each inner upper surface 20a, In addition, the width in the short direction of the inner upper surface 20a of each of the first concave portion 21 to the third concave portion 23 is the maximum width of each of the first lens portion 71 to the third lens portion 73 in the short direction of the inner upper surface 20a. less than Here, the width PL in the longitudinal direction is the longest width of straight lines passing through the center of the oval inner upper surface 20a of the recess 20 and parallel to the x-axis. The width PS in the lateral direction is the longest width of straight lines passing through the center of the inner upper surface 20a of the recess 20 and parallel to the y-axis.

By lengthening the shape of the inner upper surface 20a of the concave portion 20 in one direction (here, the x-axis direction), the connection regions wr1 and wr2 and the nozzle arrangement region are secured on the +x side and the -x side of the light emitting element 50, Floating of the light emitting element 50 can be reduced. By lengthening the shape of the inner upper surface 20a of the concave portion 20 in one direction (here, the x-axis direction), a region for arranging a nozzle used for coating the reflective member 150 in the concave portion 20 (" nozzle arrangement area") can be secured. Moreover, it is possible to arrange the connection regions wr1 and wr2 for wire bonding in the concave portion 20 . Furthermore, by reducing the width PS of the inner upper surface 20a of the concave portion 20 in the lateral direction, the volume (application area) of the reflective member 150 can be reduced. If the volume of the reflective member 150 is large, the stress applied to the light emitting element 50 increases during the curing process when molding the mold resin portion 60, and the light emitting element 50 may float from the lead surface. Therefore, by making the width PS of the concave portion 20 in the lateral direction (here, the y-axis direction) smaller than the width PS of the concave portion 20 in the longitudinal direction (here, the x-axis direction), the +y Since the volume of the portion located on the side and the -y side can be reduced, the stress applied from the reflective member 150 to the light emitting element 50 during molding of the mold resin portion 60 can be reduced.

In plan view, the longitudinal width PL of the inner upper surface 20a of each recess 20 may be, for example, three times or more the maximum width of the light emitting element 50 along the longitudinal direction of the recess 20 . This makes it easier to connect wires in the recesses 20 or to apply the reflective member 150 . From the viewpoint of miniaturization of the light emitting device 1000, the width PL of the inner upper surface 20a of each recess 20 in the longitudinal direction (x-axis direction in this example) may be, for example, ten times or less the maximum width of the light emitting element 50. On the other hand, the maximum width of the inner upper surface 20a of the recess 20 in the short direction (the y-axis direction in this example) is, for example, 1.3 to 2 times the maximum width of the light emitting element 50 along the short direction of the recess 20. may be If it is 1.3 times or more, the reflective member 150 can be arranged on the +y side and the -y side of the light emitting element 50 with a predetermined thickness. If it is 2 times or less, it is possible to more effectively reduce floating of the light emitting element 50 caused by the reflective member 150 as described above.

Although the depth of each recess 20 is not particularly limited, it is preferably greater than the thickness of the light emitting element 50 . The depth of each recess 20 is the distance from the surface of the lead exposed on the inner upper surface 20a of the recess 20 to the top of the inner surface 20c of the recess 20 along the z-axis direction. The depth of the concave portion 20 may be, for example, 0.1 mm or more and 0.25 mm or less (1 time or more and 2.5 times or less the thickness of the light emitting element 50).

[Leads 11a-13b]
Each of the plurality of leads 11a-13b has electrical conductivity and functions as an electrode for supplying power to the corresponding light emitting element 50. As shown in FIG.

In the configuration illustrated in FIG. 2G, each of the plurality of leads 11a and 11b includes a portion 91 located on the main surface 100a side of the resin package 100, a portion 92 located on the back surface 100b side of the resin package 100, and a portion 92 located on the back surface 100b side of the resin package 100. and a portion 93 positioned between 91 and 92 and extending along the sides of the resin package 100 (here, the sides 100e and 100f). At least part of the portion 92 of the leads 11a and 11b is exposed on the back surface 100b of the resin package 100, and serves as a mounting surface when fixing the light emitting device 1000 to the mounting substrate. The mounting surfaces of the leads 11 a and 11 b may be flush with the lowermost surface of the dark-colored resin member 40 . This is because, by being flush with each other, it is possible to suppress inclination when the light-emitting device is mounted on the mounting substrate. Note that the other leads 12a, 12b, 13a, 13b may also have a structure similar to the leads 11a, 11b shown in FIG. 2G.

As shown in FIG. 2F, in this embodiment, leads 11a and 11b constitute a first lead pair, leads 12a and 12b constitute a second lead pair, and leads 13a and 13b constitute a third lead pair. constitutes

On the main surface 100a of the resin package 100, the first lead pair, the second lead pair and the third lead pair are arranged in the y-axis direction. On the main surface 100a, the ends of the two leads forming each lead pair are arranged to face each other while being separated from each other.

A light-emitting element 50 is arranged on one lead 11a, 12a, 13a of each of the first to third lead pairs. On the main surface 100a of the resin package 100, the leads 11a, 12a, 13a may be longer than the other leads 11b, 12b, 13b. As a result, for example, when the main surface 100a of the resin package 100 has a polygonal (for example, quadrangular) planar shape, the central point of one side of the polygon in plan view and the approximate center of the main surface 100a in plan view It is possible to arrange the light emitting element 50 on a straight line (or near the straight line) connecting the points located at . In this example, the planar shape of the main surface 100a is rectangular, and the light emitting elements 50 are arranged on straight lines passing through the respective central points of two sides parallel to the x-axis of the rectangle in plan view.

One lead 11a, 12a, 13a of the first to third lead pairs has an exposed region 30a on the inner upper surface 20a of the first to third recesses 21 to 23, respectively. Each exposed region 30a includes an element mounting region dr on which the corresponding light emitting device 50 is arranged, and a first connection region wr1. The other leads 11b, 12b, 13b of the first to third lead pairs have exposed regions 30b on the inner upper surfaces 20a of the first to third recesses 21 to 23, respectively. Each exposed region 30b includes a second connection region wr2. The first connection region wr1 and the second connection region wr2 are regions electrically connected to positive and negative electrodes of the corresponding light emitting elements 50 by wires. In each recess 20, the element mounting region dr may be located between the first connection region wr1 and the second connection region wr2 in plan view.

The leads 11a-13b may be composed of a substrate and a metal layer coating the surface of the substrate. Substrates include, for example, metals such as copper, aluminum, gold, silver, iron, nickel, or alloys thereof, phosphor bronze, and copper with iron. These may be single layers or laminated structures (for example, clad materials). Copper may be used as the base material. The metal layer is, for example, a plated layer. Metal layers include, for example, silver, aluminum, nickel, palladium, rhodium, gold, copper, or alloys thereof. By having the leads 11a to 13b having such a metal layer, light reflectivity and/or bondability with a metal wire or the like, which will be described later, can be enhanced. For example, a lead having a silver-plated layer on the surface of a copper alloy that is a base material may be used.

[Dark resin member 40]
The dark-colored resin member 40 has insulating properties in order to electrically isolate the light emitting element 50 from the outside. At least the portion of the dark-colored resin member 40 located on the main surface 100a side of the resin package 100, that is, on the side of the light emission observation surface, is preferably dark-colored such as black or gray. For example, the dark resin member 40 may be colored dark. Alternatively, the dark resin member 40 may be a white resin printed with dark ink. Alternatively, the dark-colored resin member 40 may be molded with two colors of a dark-colored resin and a white-colored resin. This makes it difficult for external light or the like to be reflected on the main surface 100 a of the resin package 100 . Therefore, the contrast of the light emitting device 1000 can be improved. In this specification, the term “dark color system” refers to a color with a brightness of 4.0 or less in the Munsell color system (20 hues). The hue is not particularly limited, and the saturation can be arbitrarily determined as necessary. Preferably, the brightness is 4.0 or less and the chroma is 4.0 or less.

In the example shown in FIGS. 2F and 2G, on the main surface 100a, the dark-colored resin member 40 includes a first resin portion 41 exposed on the inner upper surface of each recess 20 and a second resin portion surrounding the inner upper surface of each recess 20. and a portion 42 . The upper surface of the second resin portion 42 is positioned above (in the +z direction) the upper surface of the first resin portion 41 . The second resin portion 42 is a wall surrounding the recess 20 , and the inner wall of the wall made of the second resin portion 42 may be the inner side surface 20 c of the recess 20 . The dark-colored resin member 40 may further include a third resin portion 43 located outside the second resin portion 42 on the main surface 100a. The upper surface of the third resin portion 43 is located below the second resin portion 42 (-z direction). The third resin portion 43 may have a groove 44 positioned between two adjacent recesses 20 . The groove 44 extends in the x-axis direction from the side portion 100e of the resin package 100 to the side portion 100f. A portion of the upper surface of the third resin portion 43 other than the groove 44 may be positioned above the first resin portion 41 , and the inner upper surface of the groove 44 may be positioned below the first resin portion 41 . The groove 44 can enhance the adhesion between the mold resin portion 60 and the dark-colored resin member 40 .

The dark-colored resin member 40 may have a hole 45 positioned between two adjacent recesses 20 and passing through the resin package 100 in the z-axis direction. In this example, two holes 45 are arranged between the first recess 21 and the second recess 22 and between the second recess 22 and the third recess 23 in plan view. In this example, the planar shape of the hole 45 is circular, but it may be oval or rectangular.

At the side of the resin package 100, the dark-colored resin member 40 may have an upward step (that is, facing the +z direction). The steps of the dark-colored resin member 40 can support the mold used when molding the mold resin portion 60 (see FIG. 12F). By having the step, it is possible to reduce defects such as resin leakage caused by the formation of a gap between the mold and the resin package 100 . In this example, the resin package 100 includes a step surface st1 extending from the +x side end of the side portion 100c to the +x side end of the side portion 100d via the side portion 100e, and the −x side of the side portion 100c. and a stepped surface st2 extending from the end of the side portion 100f to the end of the side portion 100d on the −x side via the side portion 100f. In this specification, a surface corresponding to the tread surface of a staircase is referred to as a "step surface" in the stepped outer surface in a cross-sectional view. A step surface is not formed in the central portion of the side portions 100c and 100d. Therefore, when viewed from above, resin package 100 has a notch at the center of side portion 100c and side portion 100d.

The dark-colored resin member 40 is not limited to the illustrated shape as long as it has a shape capable of holding at least part of the plurality of leads 11a to 13b. Preferably, the dark-colored resin member 40 integrally fixes the plurality of leads 11a to 13b (three pairs of leads here). By firmly fixing the leads 11a to 13b with the dark resin member 40, vibration of the leads 11a to 13b can be reduced when the mold resin portion 60 is formed by the transfer molding method.

As the material of the dark-colored resin member 40, a material having a small coefficient of thermal expansion and excellent adhesion to the mold resin portion 60 may be selected. The coefficient of thermal expansion of the dark-colored resin member 40 may be substantially equal to that of the mold resin portion 60, or may be higher than that of the mold resin portion 60 in consideration of the influence of heat from the light emitting element 50. It can be small.

The dark-colored resin member 40 can be formed using, for example, a thermoplastic resin. Thermoplastic resins include aromatic polyamide resin, polyphthalamide resin (PPA), sulfone resin, polyamideimide resin (PAI), polyketone resin (PK), polycarbonate resin, polyphenylene sulfide (PPS), and liquid crystal polymer (LCP). , ABS resin, PBT resin, and other thermoplastic resins can be used. It should be noted that these thermoplastic resins containing glass fiber may be used as the thermoplastic material. By containing glass fibers in this way, it is possible to form a resin package having high rigidity and high strength. The term "thermoplastic resin" as used herein refers to a substance having a linear polymer structure that softens or even liquefies when heated and solidifies when cooled. Examples of such thermoplastic resins include styrene, acrylic, cellulose, polyethylene, vinyl, polyamide, and fluorocarbon resins.

Alternatively, the dark-colored resin member 40 may be formed using a thermosetting resin such as silicone resin or epoxy resin.

The resin material of the dark-colored resin member 40 may be added with a coloring agent for coloring in a dark color. Various dyes and pigments are preferably used as the colorant. Specific examples include Cr ₂ O ₃ , MnO ₂ , Fe ₂ O ₃ and carbon black. The amount of the coloring agent to be added may be, for example, 0.3% or more and 1.5% or less, preferably 0.5% or more and 1.0% or less, relative to the base resin material. As an example, a thermoplastic resin material obtained by adding a small amount of dark-colored particles such as carbon to polyphthalamide (PPA) may be used.

[Reflective member 150]
As shown in FIGS. 2C-2E, the reflective member 150 includes a first reflective member 151 disposed within the first recess 21, a second reflective member 152 disposed within the second recess 22, and a third reflective member 153 positioned within the third recess 23 .

A reflective member 150 is disposed around each light emitting element 50 within each recess 20 . The reflective member 150 reflects light emitted from the side surface of the light emitting element 50 and guides the light above the light emitting element 50 . Thereby, the utilization efficiency of the light emitted from the light emitting element 50 can be improved.

In this specification, the phrase "the reflective member is positioned around the light emitting element" includes the case where the reflective member 150 is positioned close to the side surface of the light emitting element 50 in plan view. The reflective member 150 may or may not be in direct contact with the side surface of the light emitting element 50 . Preferably, the reflective member 150 contacts the sides of the light emitting element 50 . More preferably, the reflective member 150 surrounds the side surface of the light emitting element 50 in plan view. More preferably, the reflective member 150 covers the entire side surface of the light emitting element 50 . Since the reflective member 150 is in contact with all side surfaces of the light emitting element 50 (in this example, all four side portions located on the +x, −x, +y, and −y sides), the light emitted from the light emitting element 50 is , ±x and ±y directions can be more effectively reduced.

In the example shown in FIGS. 2C to 2E, the reflective member 150 is arranged on the entire area of the inner upper surface 20a of the recess 20 other than the area where the light emitting element 50 is arranged in plan view. For example, in plan view, the entire arrangement area of the reflective member 150 is positioned outside the corresponding lens portion 70 . The reflective member 150 may be in contact with the inner side surface 20 c of the recess 20 .

The reflective member 150 may also be arranged between the inner upper surface 20 a of the recess 20 and the lower surface of the light emitting element 50 . For example, a reflective member (for example, a resin containing a light-reflective substance) 150 may be applied in advance inside the recess 20, and the light emitting element 50 may be arranged thereon. As a result, leakage of light emitted from the light emitting element 50 in the -z direction can be more effectively reduced. Moreover, the die-bonding resin for bonding the light-emitting element 50 to the main surface 100a is not required.

It is preferable that the reflective member 150 is not arranged on the main surface 100a of the resin package 100 on the area (for example, the second resin portion 42 and the third resin portion 43) located outside the recess 20. FIG.

In plan view, the length t of the reflective member 150 covering the side surface of the light emitting element 50 from the side surface of the light emitting element 50 to the periphery of the reflective member 150 along the normal direction of the side surface of the light emitting element 50 is It may be 10 μm or more, for example, about 50 μm, or about 100 μm. When the light emitting element 50 is rectangular in plan view, it is preferable that the portions of the reflective member 150 located on both sides of the two sides of the light emitting element 50 facing each other have approximately the same length t.

For example, as shown in FIG. 2H, when the light emitting element 50 has two side surfaces 50s1 and 50s2 parallel to the x-axis and two side surfaces 50s3 and 50s4 parallel to the y-axis, the reflective member 150 The lengths t1 and t2 of the portions covering the side surfaces 50s1 and 50s2 of one light emitting element 51 may be the same. Similarly, the lengths t3 and t4 of the portions of the reflective member 150 that cover the side surfaces 50s3 and 50s4 of the light emitting element 50 may be the same. If the lengths t3 and t4 are the same, the reflective member 150 can suppress light leakage from the +x side side surface 50s3 and the -x side side surface 50s4 of the light emitting element 50 to the same extent. , t2 are the same, light leakage from the side surface 50s1 on the -y side and the side surface 50s2 on the +y side of the light emitting element 50 can be suppressed to the same extent. Therefore, the influence of the reflective member 150 on the light distribution can be suppressed. When the lengths t1 to t4 are, for example, 50 μm or less, setting the lengths t1 to t4 as described above can more effectively reduce the influence on the light distribution. Moreover, if the lengths t1 and t2 are the same and the lengths t3 and t4 are the same, the asymmetry of the stress applied to the light emitting element 50 when heat is applied to the reflective member 150 can be reduced. can be done. The “stress asymmetry” referred to here means that a large stress is applied only to one of the two side surfaces located on the ±x sides 50s3 and 50s4 of the light emitting element 50, or that a large stress is applied to only one of the two side surfaces 50s1 and 50s2 located on the ±y side of the light emitting element 50. It means that a large stress is applied only to one side. As a result of reducing the stress asymmetry, it is possible to reduce floating of the reflective member 150 and the light emitting element 50 from the leads 11a, 12a, and 13a. For example, when the lengths t1 to t4 are 50 μm or more, setting the lengths t1 to t4 as described above can more effectively reduce floating of the light emitting element 50 and the like. As shown in FIGS. 2D and 2E, in a cross-sectional view passing through the center line of the light emitting element 50 and parallel to the xz plane or the yz plane, the reflective members 150 located on both sides of each light emitting element 50 have the following shapes: It is preferable to be approximately line symmetrical with respect to the center line of the light emitting element 50 . Since the shape of the reflective member 150 is axisymmetric, the thickness of the precoat resin 180 described later can be made uniform.

In addition, the reflective member 150 may be arranged close to the side surface of the light emitting element 50 and may not be arranged on the entire inner upper surface of the recess 20 . For example, as illustrated in FIGS. 3A and 3B, a light emitting element 50a having side surfaces covered with a reflective member 150 may be prepared, and the light emitting element 50a may be arranged on the inner upper surface 20a of the recess 20. FIG. Alternatively, as will be described later, a resin wall for controlling the position of the reflective member 150 may be provided inside the recess 20 . As a result, the area of the inner upper surface 20a of the recess 20 where the reflective member 150 is arranged can be reduced. For example, the entire arrangement area of each reflective member 150 may be located inside the corresponding lens portion 70 . Specifically, in plan view, the first reflecting member 151 is positioned inside the first lens portion 71, the second reflecting member 152 is positioned inside the second lens portion 72, and the third reflecting member 153 may be positioned inside the third lens portion 73 .

The reflective member 150 may be, for example, a reflective resin. The reflective resin includes a base resin and a light-reflecting substance dispersed in the resin. As the base material, an epoxy resin, a silicone resin, a resin mixture thereof, or a translucent material such as glass can be used. From the viewpoint of light resistance and moldability, it is preferable to select a silicone resin as the base material.

Titanium oxide, silicon oxide, zirconium oxide, yttrium oxide, yttria-stabilized zirconia, potassium titanate, aluminum oxide, aluminum nitride, boron nitride, mullite, and the like can be used as the light-reflecting substance. In this embodiment, for example, titanium oxide is used. The concentration of the light-reflecting substance in the reflective member 150 is preferably 10% by weight or more and 70% by weight or less. The reflective member 150 preferably contains titanium oxide as a light reflecting material. In addition, the reflective member 150 may contain a glass filler or the like in order to reduce thermal expansion and contraction of the base material resin. The concentration of the glass filler is preferably more than 0% by weight and less than 30% by weight. However, the concentration of the light-reflecting substance, the glass filler, etc. is not limited to this.

The reflective member 150 may be any member as long as it reflects the light emitted from the light emitting element 50 . The reflective member 150 is preferably made of a material having a reflectance of 80% or higher for light emitted from the light emitting element 50 . Note that the reflective member 150 may block the light emitted from the light emitting element 50 . For example, the reflective member 150 can be a single layer or multilayer film made of metal, or a multilayer film (dielectric multilayer film) in which two or more kinds of dielectrics are laminated. As the dielectric multilayer film, for example, a DBR (distributed Bragg reflector) film may be used.

[Light emitting element 50]
The light emitting element 50 is a semiconductor light emitting element such as a semiconductor laser or a light emitting diode. The emission wavelength of each light emitting element 50 can be arbitrarily selected.

The shape of the light emitting element 50 in plan view is, for example, a rectangle or a hexagon. The size of the light emitting element 50 is not particularly limited. The vertical and horizontal lengths of the light emitting element 50 are, for example, 0.1 mm or more and 1 mm or less. For example, the light emitting element 50 has a square shape with a side of 320 μm in plan view.

In this embodiment, the plurality of light emitting elements 50 includes a first light emitting element 51 that emits the first light, a second light emitting element 52 that emits a second light having a shorter wavelength than the first light, and a and a third light emitting element 53 that emits third light on the short wavelength side. The emission wavelength of each light-emitting element 50 may be selected such that white or incandescent mixed-color light is obtained when the plurality of light-emitting elements 50 are lit. For example, the first light emitting element 51 is a red light emitting element that emits red, the second light emitting element 52 is a green light emitting element that emits green, and the third light emitting element 53 is a blue light emitting element that emits blue. good too. The combination of the number of light-emitting elements and the emission colors is an example, and is not limited to this example. The three light emitting elements 50 may emit light of the same wavelength. For example, three blue light-emitting elements may be selected by using phosphors to be described later.

As blue and green light emitting elements, light emitting elements using ZnSe or nitride semiconductors (In _X Al _Y Ga _1-XY N, 0≦X, 0≦Y, X+Y≦1) can be used. . For example, a light-emitting element in which a semiconductor layer containing GaN is formed on a supporting substrate such as sapphire may be used. A GaAs, AlInGaP, or AlGaAs-based semiconductor or the like can be used as a red light emitting element. For example, a light-emitting element in which a semiconductor layer containing AlInGaP is formed on a supporting substrate such as silicon, aluminum nitride, or sapphire may be used. Furthermore, semiconductor light-emitting elements made of other materials can also be used. The composition, emission color, size, number, and the like of the light-emitting element can be appropriately selected according to the purpose.

Arbitrary light emission can be obtained by arranging a phosphor for converting the wavelength of light emitted from the semiconductor chip around the semiconductor chip made of a nitride-based semiconductor or the like. In this specification, the "light emitting element 50" includes not only a semiconductor chip made of a nitride-based semiconductor or the like, but also an element made of a semiconductor chip and phosphor. Specific examples of phosphors include cerium-activated yttrium-aluminum garnet, cerium-activated lutetium-aluminum garnet, europium- and/or chromium-activated nitrogen-containing calcium aluminosilicate (one of calcium part can be replaced with strontium), europium-activated sialon, europium-activated silicate, europium-activated strontium aluminate, and manganese-activated potassium fluorosilicate. As an example, each of the first light emitting element 51, the second light emitting element 52 and the third light emitting element 53 may have a semiconductor chip that emits blue light. In this case, in at least two of these light emitting elements, by arranging a phosphor around the semiconductor chip, the luminescent colors of the first light emitting element 51, the second light emitting element 52 and the third light emitting element 53 are mutually matched. can be different.

The first light emitting element 51, the second light emitting element 52, and the third light emitting element 53 are each joined to the exposed region 30 of any one of the leads 11a to 13b by a joining member such as resin, solder, or conductive paste. obtain.

The first to third light emitting elements 51 to 53 may each be arranged in exposed regions 30 of three different leads (here leads 11a, 12a, 13a). As a result, the heat radiation paths of the first light emitting element 51, the second light emitting element 52, and the third light emitting element 53 can be separated from each other, so that the heat generated in each light emitting element 50 can be efficiently radiated.

As shown in FIG. 2D, the positive and negative electrodes of the first light emitting element 51 are electrically connected to leads 11a and 11b of the first lead pair by a pair of wires 81 made up of wires 81a and 81b, respectively. One end of the wire 81a is connected to a portion (connection region wr1) of the exposed region 30a of the lead 11a, and the other end is connected to one of the positive and negative electrodes of the first light emitting element 51. FIG. One end of the wire 81b is connected to a portion (connection region wr2) of the exposed region 30b of the lead 11b, and the other end is connected to the other of the positive and negative electrodes of the first light emitting element 51. FIG. Similarly, as shown in FIG. 2C, the positive and negative electrodes of the second light emitting element 52 and the third light emitting element 53 are electrically connected to the leads of the second lead pair and the third lead pair by a pair of wires 82 and 83, respectively. properly connected.

Wires 81 to 83 can be metal wires of gold, silver, copper, platinum, aluminum, or alloys thereof. Among these, it is preferable to use a gold wire having excellent ductility or a gold-silver alloy wire having a higher reflectance than the gold wire.

In the configuration shown in FIG. 2C, as described above, the first to third light emitting elements 51 to 53 overlap each other in a side view from the y-axis direction. Note that the arrangement of the first to third light emitting elements 51 to 53 is not limited to the illustrated example. For example, as illustrated in FIG. 4, one light-emitting element 52 located in the center in the y-axis direction in plan view is displaced from the line connecting the centers of the other two light-emitting elements 51 and 53. good too. In such a configuration, only two light emitting elements 51 and 53 of the three light emitting elements may overlap each other in a side view from the y-axis direction.

[Precoat resin 180]
As illustrated in FIGS. 2I and 2J, the light emitting device 1000 has translucency between the first reflective member 151 and the first light emitting element 51 and the mold resin portion 60 in the first concave portion 21. A precoat resin 180 may also be provided. Similarly, in the second recess 22 , between the second reflective member 152 and the second light emitting element 52 and the mold resin portion 60 , and in the third recess 23 , the third reflective member 153 and the third light emitting element A precoat resin 180 may also be provided between the element 53 and the mold resin portion 60 . In the present embodiment, the upper surface of the second resin portion 42 that surrounds the first to third recesses 21 to 23 is used to precoat each of the first to third recesses 21 to 23 with a constant thickness. A resin 180 can be formed. The thickness of the precoat resin 180 may be, for example, approximately 100 μm. The precoat resin 180 preferably has substantially the same thickness on the ±y sides of the light emitting element 50 and substantially the same thickness on the ±x sides of the light emitting element 50 in a plan view. It is more preferable that the inside of the first concave portion 21 is uniform as a whole. Since the thickness of the precoat resin 180 is constant, the light distribution can be easily controlled. In addition, since the upper surface of the precoat resin 180 (the interface between the precoat resin 180 and the mold resin portion 60) can be made substantially flat, the controllability of the light distribution by the lens portion 70 can be prevented from deteriorating. In addition, since the thickness from the upper surface of each light emitting element 50 to the precoat resin is uniform, the mold resin portion 60, which will be described later, can be kept away from the light and heat emitted by the light emitting element 50, thereby further enhancing the reliability. can be done.

The precoat resin can be arranged to cover the reflective member 150 and the light emitting element 50, for example. As the precoat resin, a resin that is excellent in high heat resistance and high weather resistance (for example, epoxy resin, silicone resin, mixed resin thereof) can be used. As will be described later, a resin containing a coloring agent (colored resin member) may be used as the precoat resin.

[Mold resin part]
The mold resin portion 60 includes a plurality of integrally formed lens portions 70 . In this embodiment, the mold resin portion 60 includes a base portion 61 and a plurality of lens portions 70 . The base portion 61 and the lens portion 70 are integrally molded. The base portion of the mold resin portion 60 and the lens portion 70 may be separate bodies.

[Base part 61]
As shown in FIGS. 2A to 2E, the base portion 61 of the mold resin portion 60 covers the main surface 100a of the resin package 100 and the plurality of light emitting elements 50. As shown in FIGS. The base portion 61 has the function of sealing the light emitting element 50 and holding the lens portion 70 integrally formed with the base portion 61 at a predetermined position.

In this embodiment, the base portion 61 has, for example, an upper surface 61a located above the main surface 100a of the resin package 100 . The upper surface 61 a may be slightly larger than the main surface 100 a of the resin package 100 .

Base portion 61 includes a side portion 61b that covers at least a portion of side portions 100c to 100f of resin package 100. As shown in FIG. In the illustrated example, the side surface portion 61b of the base portion 61 is in contact with the stepped surfaces st1 and st2 formed on the side portions 100c to 100f of the resin package 100. As shown in FIG. A portion of the side surface portion 61b of the base portion 61 covers the portions of the side portions 100c and 100e where the stepped surfaces are not formed, and extends below the stepped surfaces st1 and st2 (in the -z direction). . The lowermost end of the base portion 61 may be flush with the rear surface 100b of the resin package 100 .

A part of the base portion 61 is positioned inside the groove 44 and the hole 45 of the dark-colored resin member 40 . As a result, it is possible to reduce peeling, deviation, etc. of the lens portion 70, and to hold the lens portion 70 more stably. In a cross-sectional view, a portion of the base portion 61 arranged in the hole 45 is preferably arranged below (-z direction) the stepped surface st1 or the stepped surface st2 of the resin package 100. It is more preferable that they are arranged up to the position of the back surface 100b of 100 . The shape, light transmittance, etc. of the base portion 61 are not particularly limited.

[Lens portion 70]
As shown in FIGS. 2A to 2E, each of the plurality of lens portions 70 has a convex shape projecting upward (+z direction) from the upper surface of the base portion 61 . The lens unit 70 has a light distribution function of controlling the direction and distribution of emitted light.

The planar shape of each lens portion 70 is, for example, elliptical or circular. In the illustrated example, the planar shape of each lens portion 70 is an ellipse, with the long axis of the ellipse extending in the x-axis direction and the short axis thereof extending in the y-axis direction. Therefore, a light distribution that is wide in the x-axis direction and narrow in the y-axis direction can be obtained. The light-emitting device 1000 having such light distribution can be particularly suitably used in display devices such as LED displays. In addition, in a side view seen from the x-axis direction or the y-axis direction, the outer edge of the lens portion 70 may have a linear portion in addition to the curved portion such as an elliptical arc shape or an arc shape. The straight portion may be located between the curved portion and the upper surface 61 a of the base portion 61 . For example, the lens portion 70 may have a shape in which a portion of a sphere (for example, a hemisphere) is arranged on a truncated cone, a shape in which a portion of an ellipsoid is arranged on a truncated elliptical cone, or the like. .

Each of the plurality of lens units 70 is arranged in association with one of the light emitting elements 50 . The optical axis of each lens portion 70 may coincide with the center of the corresponding light emitting element 50 (the center of the light emitting surface). Thereby, the controllability of the light distribution of the light emitting device 1000 can be further improved.

The major axis of the ellipse of each lens portion 70 and the longitudinal direction of the corresponding recess 20 are parallel, and the minor axis of the ellipse of each lens portion 70 and the short direction of the corresponding recess 20 are parallel. may Also, the minor axis of the elliptical shape of each lens portion 70 may be parallel to the direction in which the lens portions 70 are arranged (here, the y-axis direction). Thereby, the light emitting device 1000 can be further miniaturized. Furthermore, when the light emitting element 50 has a rectangular shape, the longitudinal direction of the light emitting element 50 and the long axis of the elliptical shape of the lens portion 70 are parallel, and the short direction of the light emitting element 50 and the elliptical shape of the lens portion 70 are aligned. It may be parallel to the short axis.

It should be noted that the shape and arrangement of each lens portion 70 in a plan view can be appropriately selected in consideration of light distribution, light collection, and the like.

In this embodiment, the first light emitted by the first light emitting element 51 is transmitted through the first lens portion 71 and emitted from the emission surface of the light emitting device 1000 . The emitting direction and distribution of the first light are controlled by the first lens unit 71 . Similarly, the second light emitted by the second light emitting element 52 passes through the second lens portion 72 , and the third light emitted by the third light emitting element 53 passes through the third lens portion 73 . The second lens portion 72 and the third lens portion 73 control light distribution of the second light and the third light, respectively.

As shown in FIG. 2C , the first lens portion 71 may overlap the first light emitting element 51 and at least a portion of the first reflective member 151 in plan view. Similarly, the second lens portion 72 overlaps the second light emitting element 52 and at least a portion of the second reflective member 152, and the third lens portion 73 overlaps the third light emitting element 53 and the third reflective member. 153 may be overlapped.

In addition, in the present embodiment, since the maximum width of each lens portion 70 is smaller than the maximum width of the corresponding concave portion 20 in plan view, a portion of the inner upper surface 20a of each concave portion 20 extends outside the lens portion 70. can be located. As illustrated, a portion of the first reflective member 151 inside the first concave portion 21 may be positioned outside the first lens portion 71 in plan view. Similarly, a portion of the second reflective member 152 within the second recess 22 is located outside the second lens portion 72 and a portion of the third reflective member 153 within the third recess 23 is located outside the third lens portion 72 . It may be positioned outside the lens portion 73 .

When each lens portion 70 has an elliptical shape having a major axis and a minor axis in plan view, the length WL of the major axis of the ellipse is smaller than the longitudinal width PL of the corresponding recess 20, and The length WS of the minor axis of the ellipse may be smaller than the width PS of the corresponding recess 20 in the lateral direction.

As described above, in the present embodiment, the maximum width of each lens part 70 (in this example, the length WS of the minor axis of the ellipse) is the maximum width of the corresponding light emitting element 50 when viewed from the side in the x-axis direction. It may be 5 times or less of (here, the length w1 of the side of the rectangle). On the other hand, when viewed from the side in the x-axis direction, the maximum width of each lens portion 70 is, for example, more than 1 time, preferably 3 times or more, the maximum width of the corresponding light emitting element 50 . Thereby, desired light distribution control can be achieved more reliably.

Further, as described above, among the cross sections including the line connecting the vertex of each lens portion 70 and the center point of the lens portion 70 in plan view, the lens portion 70 has the smallest width. may be less than or equal to five times the width of the corresponding light emitting element 50 . On the other hand, in the above cross section, the width of the lens portion 70 is more than 1 time, preferably 3 times or more, the width of the corresponding light emitting element 50 . Thereby, desired light distribution control can be achieved more reliably.

In the example shown in FIG. 2C, the first lens portion 71, the second lens portion 72, and the third lens portion 73 are arranged in the y-axis direction in plan view. In plan view, the centers of the first lens portion 71 to the third lens portion 73 may be positioned on a straight line parallel to the y-axis. Note that the arrangement of the lens unit 70 is not limited to this example. For example, as shown in FIG. 4, among the first lens portion 71, the second lens portion 72, and the third lens portion 73, the center of the lens portion located in the center in the x-axis direction or the y-axis direction It does not have to be positioned on the line connecting the centers of the two lens parts.

[Material of molded resin part 60]
Mold resin portion 60 includes a translucent base material. It is preferable that the mold resin portion 60 has a light transmittance of 90% or more at each peak wavelength of the plurality of light emitting elements 50 . Thereby, the light extraction efficiency of the light emitting device 1000 can be further improved.

As the base material of the mold resin portion 60, thermosetting resins such as epoxy resins, urea resins, and silicone resins, which are excellent in weather resistance and translucency, glass, and the like are preferably used.

The mold resin portion 60 in this embodiment may contain a light diffusing material in order to improve the uniformity of the light quality of the light emitting device 1000 . By including the light diffusing material in the mold resin portion 60, the light emitted from the light emitting element 50 can be diffused, thereby suppressing unevenness in light intensity. As such a light diffusing material, inorganic materials such as barium oxide, barium titanate, barium oxide, silicon oxide, titanium oxide, and aluminum oxide, and organic materials such as melamine resin, CTU guanamine resin, and benzoguanamine resin are preferably used. .

The mold resin portion 60 may contain various fillers. A specific material is the same as that of the light diffusing material, but the median particle diameter (D ₅₀ ) is different from that of the light diffusing material. The term "filler" as used herein refers to a material having a median particle size of 5 μm or more and 100 μm or less. When a filler having such a particle size is contained in the translucent resin, the chromaticity variation of the light-emitting device 1000 is improved due to the light scattering effect, the thermal shock resistance of the translucent resin is increased, and the inside of the resin is reduced. stress can be relieved.

The surface roughness of the base portion 61 is not particularly limited, but from the viewpoint of improving the display contrast, the larger one is preferable. For example, part or the entire surface of the base portion 61 may be roughened. At least a portion of the upper surface 61a of the base portion 61 that does not overlap with the plurality of lens portions 70 in plan view is preferably roughened. The outer surface of the side surface portion 61b of the base portion 61 may also be roughened. The surface roughness of the upper surface 61a and the surface roughness of the outer surface of the side portion 61b may be the same or different. For ease of processing, it is preferable that the outer surfaces of the upper surface 61a and the side surface portion 61b have the same surface roughness. Since the surface roughness of the base portion 61 is large, it is possible to scatter external light such as sunlight on the surface of the base portion 61 and suppress the reflection intensity. As a result, the light emitting device 1000 can prevent deterioration of contrast due to reflection of external light.

The surface roughness of the portion of the upper surface 61 a of the base portion 61 that does not overlap with the plurality of lens portions 70 in plan view may be greater than the surface roughness of the lens portion 70 , for example. Such a structure can be obtained, for example, by forming the mold resin portion 60 including the base portion 61 and the lens portion 70 and then roughening a predetermined region of the surface of the base portion 61 such as blasting. . Alternatively, a casting case (see FIG. 4) having a partially roughened inner surface may be used to form the mold resin portion 60 . As will be described in detail later, for example, by roughening a portion of the inner surface of the casting case that forms the upper surface 61a of the base portion 61, the upper surface 61a of the base portion 61 has a plurality of lenses in plan view. The surface roughness of the portion that does not overlap with the portion 70 can be increased.

The arithmetic average roughness Ra of the upper surface 61a of the base portion 61 is preferably 0.4 μm or more and 5 μm or less. More preferably, Ra is 0.8 μm or more and 3 μm or less. Ra of the outer surface of the side surface portion 61b of the base portion 61 may also be in the same range as above. Ra can be measured according to the surface roughness measurement method of JIS B 0601-2001. Specifically, Ra is obtained by extracting a portion of the measurement length L from the roughness curve in the direction of its center line, setting the center line of this extracted portion as the X axis, the direction of the longitudinal magnification as the Y axis, and calculating the roughness curve. When y=f(x), it is represented by the following equation.

A contact-type surface roughness measuring machine, a laser microscope, etc. can be used for the measurement of Ra. In this specification, a Keyence laser microscope VK-250 is used.

The base portion 61 preferably has a light transmittance of 90% or more at each peak wavelength of the plurality of light emitting elements 50 . Thereby, the light extraction efficiency of the light emitting device 1000 can be further improved.

[effect]
In this embodiment, since the reflective member 150 is arranged around each light emitting element 50, the size of the surface that serves as the light source can be reduced (point light source). Light from the side surface of each light emitting element 50 can be reflected toward the light emitting element 50 side, and the light can be emitted from the upper surface of the light emitting element 50 in the front direction (+z direction) of the light emitting device 1000 . Therefore, even if the lens portion 70 is made smaller, light can be extracted from the light emitting element 50 with high efficiency. By reducing the size of the lens unit 70, the size of the light emitting device 1000 can be reduced.

Point light source conversion will be described with reference to the drawings.

5A to 5D are schematic diagrams for explaining part of light emitted from a light emitting element and incident on a lens portion in a light emitting device of a comparative example having no reflective member. FIG. 5E is a schematic diagram illustrating part of the light emitted from the light-emitting element and incident on the lens portion in the light-emitting device of the example having a reflective member. 5A to 5E are yz sectional views including the vertex of the lens portion and the center point of the lens portion in plan view.

In the comparative example shown in FIGS. 5A to 5D, the light-emitting element 50 is placed in a recess 620 whose inner top surface and side surfaces are composed of leads, for example. With such a configuration, part of the light leaking from the side surface of the light emitting element 50 is reflected by the inner side surface and the inner upper surface of the recess 620 and emitted to the lens section 670 side. Therefore, when viewed from above, the entire inner upper surface of the concave portion 620 is in a light emitting state and functions as the light source E1. The size of the light source E<b>1 in the y-axis direction (hereinafter referred to as “light source size”) is the size of the inner upper surface of the recess 620 .

As shown in FIGS. 5A and 5B, when the size of the lens unit 670 (the length in the y-axis direction: WS1) is sufficiently large with respect to the light source E1, the light La from the central portion of the light source E1 and the light source E1 Both of the light Lb from the end of the incident on the inner surface of the lens portion 70 at angles θa and θb smaller than the critical angle. Here, the inner surface of the lens portion 70 is the surface on which the light emitted from the light emitting element 50 is incident from the inside. The inner surface of the lens portion 70 may be referred to as the outer surface of the light emitting device 1000 . When the lens portion 70 is made of, for example, epoxy resin (refractive index n: 1.5), the critical angle is about 40°. These lights La and Lb are extracted from the lens section 670 to the outside at the interface between the lens section 670 and an external air layer (refractive index N=1).

On the other hand, as shown in FIGS. 5C and 5D, when the size of the lens portion 670 is reduced (the length in the y-axis direction: WS2, WS2<WS1), the light Lc from the central portion of the light source E1 is less than 40°. Since the light is incident on the inner surface of the lens portion 670 at the angle θc, the light is extracted to the outside by the lens portion 670 . However, part of the light from the light source E1, for example, the light Ld from the end of the light source E1, enters the inner surface of the lens section 670 at an angle θd larger than the critical angle. Light Ld is totally reflected by the inner surface of lens portion 670 . The totally reflected light Ld is not emitted from above the lens unit 670 as shown in, for example, FIG. For this reason, when the size of the lens portion 670 is reduced, the loss of the light flux due to total reflection increases, and the light extraction efficiency tends to decrease.

In the comparative example shown in FIGS. 5C and 5D, the light emitting element 50 is arranged in the recess 620, whereas in the embodiment shown in FIG. A reflective member 150 is disposed in contact with the . In the embodiment shown in FIG. 5E, the reflective member 150 covers the entire side surface of the light emitting element 50. In the embodiment shown in FIG. With this configuration, part of the light emitted from the side surface of the light emitting element 50 is reflected toward the light emitting element 50 by the reflective member 150 and emitted from the upper surface of the light emitting element 50 . Therefore, the light source E2 is the upper surface of the light emitting element 50 when viewed from above. The size of the light source E2 in the embodiment is the width w1 of the light emitting element 50 in the y-axis direction. Therefore, for example, when the lens portion 670 shown in FIGS. 5C and 5D has the same size as the lens portion 670 in FIG. 5E (length in the y-axis direction: WS2), the light source E2 The incident angle θe of the light Le traveling from the end toward the inner surface of the lens portion 70 is less than the critical angle, and the exit direction of the light Le can be controlled by the lens portion 70 .

Thus, in the example, the light source size is reduced more than in the comparative example, so that the emission range of the light from the light source E2 is limited to a narrower range than in the comparative example. Therefore, the light loss due to total reflection on the inner surface of the lens portion 670 is reduced. Therefore, the lens size can be reduced while maintaining light extraction. Since the lens size can be reduced, light can be extracted in the front direction with high efficiency, and a light-emitting device that can be miniaturized can be obtained.

Further, according to this embodiment, the light distribution can be controlled by the lens portion 70 provided on the exit side of the light emitting element 50 . For example, in the configuration shown in FIG. 2A, each lens portion 70 has an elliptical shape with a long axis in the x-axis direction in plan view, so that a light distribution that is wide in the x-axis direction and narrow in the y-axis direction is obtained. By controlling the light distribution in this way, the light extraction efficiency in the front direction of the light emitting device 1000 can be further improved. Therefore, according to this embodiment, it is possible to obtain the light emitting device 1000 that has a light distribution suitable for a display device such as an LED display, and further enhances the light extraction efficiency in the front direction. In addition, since the light extraction efficiency is increased and the luminance of the light emitting device 1000 is increased, excessive power is not supplied to the light emitting device 1000, and the life of the light emitting device is further improved.

The light emitting device 1000 of this embodiment has a structure that can be surface-mounted by reflow soldering. Therefore, the mounting cost and the number of mounting steps can be reduced as compared with conventional lamp-type light emitting devices mounted by flow soldering.

<Consideration of lens size>
The result of examining the relationship between the size of the lens portion and the size of the light emitting element will be described below.

Here, an example in which the reflective member 150 is arranged on the side surface of the light emitting element 50 and a comparative example in which the reflective member 150 is not arranged on the side surface of the light emitting element 50 are used. Both the example and the comparative example have the same configuration except for the presence or absence of the reflective member 150 . Using the light emitting devices A1 to A4 of the example and the light emitting devices B1 to B4 of the comparative example having lens portions 670 of different sizes, the total luminous flux of light emitted from each light emitting device was obtained.

In each of the light emitting devices of the example and the comparative example, the light emitting element is arranged in the concave portion 620 having an elliptical inner upper surface, and the lens portion 670 is arranged above it. Table 1 shows the lengths in the x-axis direction and the y-axis direction in plan view of the light emitting element 50, the concave portion 620, and the lens portion 670 of each example and each comparative example. In this example, the light emitting element 50 is rectangular in plan view, and the lengths in the x-axis direction and the y-axis direction of the light emitting element 50 are the side lengths w1 and w2 of the rectangle (square in this case), respectively. The lens portion 670 has an elliptical shape in plan view, the length in the x-axis direction of the lens portion 670 is the length WL of the long axis of the ellipse, and the length in the y-axis direction of the ellipse is the short axis of the ellipse. is the length of the shaft WS.

Further, in each example and each comparative example, the ratio of the length WS of the lens portion 670 in the y-axis direction (short side direction of the lens portion) to the length w1 of the light-emitting element in the y-axis direction (hereinafter referred to as "size ratio ) WS/w1 is also shown in Table 1.

In the light-emitting devices A1 and B1, the total luminous flux was obtained by measuring the luminous flux on the upper hemispherical surface of the light-emitting element 50 using an integrating sphere. As an integrating sphere, a 10-inch integrating sphere manufactured by LabSphere was used. The total luminous flux was measured according to the JIS C 8152 measurement method. For the light-emitting devices A2 to A4 and B2 to B4, the total luminous flux was obtained using Light Tools (registered trademark), which is optical simulation software. The simulation was performed under the same conditions as the measurement environment using the integrating sphere.
Assuming that the total luminous flux of light emitted from the light emitting device B1 of the comparative example is 100%, the relative value of the total luminous flux of each light emitting device (hereinafter referred to as "luminous flux ratio") was obtained. The results are also shown in Table 1.

FIG. 6 is a diagram showing the relationship between the size ratio WS/w1 of the lens portion to the light emitting element and the luminous flux ratio in the example and the comparative example.

It can be seen from FIG. 6 that when the size of the lens portion 670 is sufficiently large, the luminous flux ratio becomes slightly smaller when the reflective member 150 is arranged than when the reflective member 150 is not provided. For example, the total luminous flux of the light emitting device A1 of Example is approximately 89% of the total luminous flux of the light emitting device B1 of Comparative Example. This is because, in the embodiment, part of the light leaking from the side surface of the light emitting element is absorbed by the reflective member, or is transmitted through the reflective member, absorbed by the dark resin member, and emitted to the lens portion 670 side. This is probably because the loss of the luminous flux is greater than in the comparative example.

Moreover, it can be seen from FIG. 6 that the luminous flux ratio tends to decrease when the size ratio WS/w1 of the lens portion 670 to the light emitting element 50 is reduced regardless of the presence or absence of the reflective member 150 . In particular, in the comparative example in which the reflective member 150 is not arranged, the luminous flux ratio significantly decreases as the lens size is reduced. On the other hand, in the example having the reflective member 150, the reduction in the luminous flux ratio due to the reduction in the lens size is suppressed more than in the comparative example. This is because, as described above with reference to FIGS. 5A to 5E, in the embodiment, the size of the light source is reduced by the reflective member 150, and as a result, the loss of luminous flux due to the downsizing of the lens portion is reduced. Conceivable.

According to the results shown in FIG. 6, when the size ratio WS/w1 of the lens to the light emitting element is equal to or less than a predetermined value (for example, 5.0 or less), the luminous flux ratio of the light emitting device of Example becomes higher than that of Comparative Example. . From this, in the light emitting device of the example, when the size ratio WS/w1 of the lens to the light emitting element is 5.0 or less, the improvement in the luminous flux ratio due to the point light source exceeds the luminous flux loss due to the reflective member. It can be seen that a higher luminous flux ratio is obtained than in the comparative example.

Further, it can be seen that in the light emitting device of the example, if the size ratio WS/w1 is, for example, 3.0 or more, a luminous flux ratio of 84% or more can be obtained.

In addition, although the results of examination using the lens portion 670 having an elliptical planar shape are shown in the above embodiment, the planar shape of the lens portion 70 may not be elliptical. A similar effect can be obtained if the minimum length passing through the center (optical axis) of the lens portion 70 in plan view is five times or less the width of the light emitting element 50 along the direction parallel to the minimum length. . When the lens portion 70 is circular, the diameter of the lens portion 70 should be five times or less the maximum width of the light emitting element 50 .

Further, the above study was conducted using a light-emitting device in which the semiconductor element and the reflective member 150 are arranged in the recess 620, but the same applies to a light-emitting device in which the semiconductor element and the reflective member are not arranged in the recess 620. effect is obtained. That is, regardless of the presence or absence of the concave portion 620, if the reflective member 150 is arranged close to the side surface of the semiconductor element, the size of the light source can be reduced (point light source). Therefore, similarly to the study result shown in FIG. 6, if the size ratio WS/w1 is 5.0 or less, the light extraction efficiency can be improved more effectively.

Various modifications of the light emitting device are possible. For example, the structure and arrangement of the light emitting element, the structure and form of the resin package, the structure of the mold resin portion, and the like are not limited to those described in the above embodiments. Forms other than the forms described in the embodiments can be suitably used for the light-emitting device of the present disclosure.

Modifications of the light emitting device of the present disclosure will be described below. Differences from the light-emitting device 1000 will be mainly described below, and descriptions of structures similar to those of the light-emitting device 1000 will be omitted.

<Modification 1>
7A is a schematic top view of another light emitting device 1001 of Modification 1. FIG. FIG. 7B is a schematic cross-sectional view of light emitting device 1001 taken along line 7B-7B shown in FIG. 7A.

Light-emitting device 1001 of modification 1 differs from light-emitting device 1001 in that a plurality of colored resin members 160 are further provided.

In this modified example, the colored resin member 160 includes a first colored resin member 161 arranged in the first recess 21, a second colored resin member 162 arranged in the second recess 22, and a third colored resin member. 163. In plan view, the first lens portion 71 to the third lens portion 73 overlap at least part of the first colored resin member 161 to the third colored resin member 163, respectively. The position of each colored resin member 160 may be defined by the inner side surface 20 c of the recess 20 .

In this modification, the first to third light emitting elements 51 to 53 emit lights of different wavelengths. The first colored resin member 161 is colored in the same color as the first light emitted by the first light emitting element 51 . The second colored resin member 162 is colored in the same color as the second light emitted by the second light emitting element 52 . The third colored resin member 163 is colored in the same color as the third light emitted by the third light emitting element 53 .

In this specification, the term “similar color” means that the hue is within 3 ranges of the hue circle in the Munsell color system (20 hues), the lightness is within 3 ranges, and the saturation is within 3 ranges. means within That is, in the constant hue plane of the Munsell color system (20 hues), the hue, lightness, and saturation are assumed to be similar colors to both sides.

By arranging the colored resin member 160, when the light emitting element 50 is turned off, external light is reflected on the inner upper surface of each recess 20 (for example, the exposed region 30 of the leads 11a to 13b, the surface of the reflective member 150, etc.). can be reduced. Therefore, the light-emitting device 1001 can improve display contrast. Further, when the first light emitting element 51, the second light emitting element 52 and the third light emitting element 53 are all turned off, the subtractive color mixture of the three colored resin members 160 causes the colored resin member 160 to change the color of the colored resin member 160. It looks darker, that is, a color with a lower brightness. Such effects are called "darkening effects". The darkening effect makes the exit surface of the light emitting device 1000 look darker, thereby further improving the display contrast.

Within each recess 20 , the colored resin member 160 may be placed on the reflective member 150 . That is, at least part of the first colored resin member 161 is positioned on the first reflective member 151, at least part of the second colored resin member 162 is positioned on the second reflective member 152, and the third At least part of the colored resin member 163 may be positioned on the third reflective member 153 .

The reflective member 150 may be arranged only on a part of the inner upper surface 20a of each recess 20 in a cross-sectional view. For example, the reflective member 150 may be arranged only in areas adjacent to the side surfaces of the light emitting element 50 . In this case, the colored resin member 160 preferably covers at least the portions of the exposed lead regions 30 in each recess 20 that are not covered with the reflective member 150 .

In the illustrated example, the reflective member 150 is in contact with the side surface of the light emitting element 50 . The upper surface of the reflective member 150 is inclined so as to become lower with increasing distance from the side surface of the light emitting element 50 . The colored resin member 160 is arranged on the upper surface of the reflective member 150 and on the portion of the inner upper surface 20 a of the recess 20 exposed from the reflective member 150 .

In plan view, the colored resin member 160 may be arranged over the entire inner upper surface 20a of each recess 20 . The colored resin member 160 may be in contact with the inner side surface 20 c of the recess 20 . The colored resin member 160 may partially or entirely cover the upper surface of the corresponding light emitting element 50 . Note that the colored resin member 160 does not have to be arranged between two adjacent recesses 20 on the main surface 100 a of the resin package 100 .

When used in a large outdoor display such as a billboard, when the light-emitting element is turned off, external light entering the light-emitting device is reflected around the light-emitting element, resulting in a decrease in display contrast. may cause In this modified example, the display contrast can be further improved. The reason is explained below.

In this embodiment, each recess 20 is provided with a light-emitting element 50 and a colored resin member 160 colored in a color similar to the color emitted by the light-emitting element 50 . As a result, it is possible to reduce external light reflection in the concave portion 20 when the light emitting element 50 is turned off without interfering with the emitted light color when the light emitting element 50 is turned on. Therefore, display contrast can be improved.

Furthermore, when the first light emitting element 51, the second light emitting element 52, and the third light emitting element 53 are turned off, subtractive color mixing of the colors of the first colored resin member 161, the second colored resin member 162, and the third colored resin member 163 The first colored resin member 161, the second colored resin member 162, and the third colored resin member 163 appear darker than the colored color, ie, have a low brightness. For example, the light emitting device 1000 is mounted on a display device or the like, and when a viewer looks at the display device, the first colored resin member 161, the second colored resin member 162, and the third colored resin member 163 are arranged close to each other. By appearing to be, subtractive color mixing occurs. As a result, the emission surface of the light emitting device 1000 looks dark, so that the display contrast can be further enhanced.

In the light emitting device 1001, when the first light emitting element 51, the second light emitting element 52 and the third light emitting element 53 are lit, the light transmitted through the first lens portion 71, the second lens portion 72 and the third lens portion 73 is mixed. The emitted light is, for example, white. On the other hand, when the first light emitting element 51, the second light emitting element 52, and the third light emitting element 53 are turned off, the first colored resin member 161, the second colored resin member 162, and the third colored resin member 163 are colored. A color with a lower lightness than the color, for example, a dark color such as gray or black may appear.

[Colored resin member 160]
Colored resin member 160 includes a resin material as a base material and a coloring agent. A base material of the colored resin member 160 is, for example, a thermosetting resin such as epoxy resin, urea resin, or silicone resin, which is excellent in weather resistance and translucency. The term "thermosetting resin" as used herein refers to a plastic that hardens when heated under pressure. Thermosets, once cured, cannot be remelted or remolded without loss of their original properties. Examples of such thermosetting resins include epoxy-based, melamine-based, phenol-based, and urea-based resins.

Various dyes, pigments, and the like can be used as the colorant to be contained in the resin material. The coloring agent may be an inorganic member or an organic member. Specific examples include perylene red, condensed azo red, quinacridone red, copper phthalocyanine blue, copper phthalocyanine green, curcumin, and coal tar dyes. By including a colorant in the resin material, a darkening effect as described above can be obtained. In addition, when the content of the coloring agent increases, the light extraction efficiency may decrease. For this reason, the content of the colorant is preferably selected so as to achieve high display contrast due to the dark color effect while ensuring light extraction efficiency.

<Modification 2>
FIG. 8A is a schematic top perspective view of a light emitting device 1002 of Modification 2. FIG. 8B are schematic cross-sectional views taken along line 8B-8B shown in FIG. 8A, respectively. FIG. 8C is an enlarged cross-sectional view showing part of FIG. 8B.

A light-emitting device 1002 of Modification 2 differs from the light-emitting device 1000 in that each recess 20 has a resin wall 400 made of a dark-colored resin member 40 therein. The resin wall 400 is positioned between the light emitting element 50 and at least one of the first connection region wr1 and the second connection region wr2 in plan view. At least part of the reflective member 150 is positioned between each resin wall 400 and the light emitting element 50 in each recess 20 .

[Resin wall 400]
In this modified example, the resin wall 400 includes first to third resin walls 401 to 403 positioned inside the first to third recesses 21 to 23, respectively. Hereinafter, the structure including the resin wall 400 will be described by taking the first recess 21 of the three recesses 20 as an example. Since the second recess 22 and the third recess 23 also have the same structure, their description is omitted to avoid repeating the description.

The first concave portion 21 includes at least one first resin wall 401 made of a dark-colored resin member 40 inside. In this example, two first resin walls 401 facing each other with the light emitting element 50 interposed therebetween are arranged inside the first concave portion 21 in plan view. The two first resin walls 401 are respectively positioned between the first light emitting element 51 and the first connection region wr1 and the second connection region wr2 in plan view. The side surface of the first resin wall 401 on the side of the first light emitting element 51 may be parallel to either side surface of the first light emitting element 51 . At least part of the first reflective member 151 is located between each first resin wall 401 and the side surface of the first light emitting element 51 . A side surface of the first light emitting element 51 may be in contact with the first reflective member 151 . A side surface of each first resin wall 401 on the side of the first light emitting element 51 may be in contact with the first reflective member 151 . By providing the first resin wall 401, the area to which the first reflective member 151 is applied can be controlled within a predetermined range. The volume of the elastic member 151 can be reduced.

Each first resin wall 401 may be separated from the inner side surface of the first recess 21 , or part of the first resin wall 401 may be in contact with the inner side surface of the first recess 21 . In the illustrated example, each first resin wall 401 extends in the lateral direction (here, the y-axis direction) of the first recess 21 in plan view, and both ends of the first resin wall 401 are aligned with the first recess 21 . abuts the inner surface of the Thereby, the application area of the first reflective member 151 can be more reliably controlled.

In the configuration shown in FIG. 8C, each first resin wall 401 includes a side surface 401s1 located on the side of the first light emitting element 51, a side surface 401s2 located on the side opposite to the first light emitting element 51, and between the side surfaces 401s1 and 401s2. and a positioned upper surface 401a. The side surface 401s1 may be substantially perpendicular to the xy plane, and the side surface 401s2 may be a tapered surface (forward taper) that slopes downward with increasing distance from the light emitting element 50 . Each first resin wall 401 is not limited to this form. For example, the form may be such that it does not have the upper surface 401a and consists only of the side surface 401s1 and the side surface 401s2.

A portion of each first resin wall 401 located on the +z side (upper surface 401 a in this example) may be located above the upper surface of the first light emitting element 51 . The maximum height h2 of the first resin wall 401 may be smaller than the height h1 of the upper surface of the second resin portion 42 . The height h2 of the first resin wall 401 is the distance along the z-axis direction from the exposed region 30 of the leads 11a and 11b in the first recess 21 to the top surface or top of the first resin wall 401. For example, It is 0.15 mm or more and 0.2 mm or less.

A second dark-colored resin member 190 may be arranged outside the upper surface 401 a of the first resin wall 401 in the first recess 21 . The second dark-colored resin member 190 preferably covers the connecting portions between the wires and the leads 11a and 11b. Further, when the first reflective member 151 is formed by the process described later, part of the first reflective member 151 may be located outside the upper surface 401 a of the first resin wall 401 . In that case, the second dark-colored resin member 190 may be arranged so as to cover the portion of the first reflective member 151 located outside the upper surface 401a. In this case, “the portion positioned outside the top surface 401a” of the first reflecting member 151 is surrounded by, for example, the side surface 401s2 of the first resin wall 401 and the inner side surface 20c and the inner top surface 20a of the recess 21. A part located in an area. The second dark-colored resin member 190 may be in contact with the side surface 401s2 of the first resin wall 401 and the inner side surface 20c of the recess 21, for example.

The second dark-colored resin member 190 may be formed using the same resin material and coloring agent as those of the dark-colored resin member 40 . As the second dark-colored resin member 190, for example, a silicone resin material to which carbon black is added can be used.

Also, a high-viscosity resin 192 may be placed on the upper surface of each light-emitting element 50 . The high-viscosity resin 192 is a resin having a higher viscosity than at least the reflective member 150, and may be, for example, a high-viscosity polycarbonate resin. The high-viscosity resin 192 may be formed using the same resin material as the reflective member 150 . Also, an additive (eg, SiO ₂ filler) may be used to increase the viscosity of the resin material that becomes the high-viscosity resin 192 . By increasing the viscosity, the high-viscosity resin 192 remains on the upper surface of the light-emitting element 50, and the top of the high-viscosity resin 192 can be raised.

The first reflective member 151 can be formed, for example, as follows. First, a high-viscosity resin 192 is placed on the upper surface of the first light emitting element 51 . Next, between the first light emitting element 51 and the first resin wall 401, a resin material to be a reflective member is arranged. The amount of the resin material can be set so that the volume of the resin material is larger than the space located between the first light emitting element 51 and the first resin wall 401 . After that, centrifugal sedimentation or the like is used to control the height of the resin material. As a result, the space between the first light emitting element 51 and the first resin wall 401 is filled with the resin material up to a position higher than the upper surface of the first light emitting element 51, and the surplus of the resin material It flows outward from the upper surface 401a of the wall 401 along the tapered side surface 401s2. At this time, since the upper surface of the first light emitting element 51 is covered with the high viscosity resin 192 , it is less likely that a part of the resin material is arranged on the upper surface of the first light emitting element 51 . Subsequently, the first reflective member 151 is obtained by curing the resin material. After that, the second dark-colored resin member 190 may be arranged on the portion of the first reflective member 151 located outside the upper surface 401 a of the first resin wall 401 .

Also in this modified example, the reflective member 150 arranged around each light-emitting element 50 enables the size reduction of the lens section 70 . For example, as described above with reference to FIG. 6, the size ratio of the lens portion to the light emitting element may be 5.0 or less. In this modified example, when both ends of each resin wall 400 are in contact with the inner side surface 20c of the recess 20, the side surface of each resin wall 400 on the light emitting element 50 side and part of the inner side surface 20c of each recess 20, The concave portions defined by the inner upper surface surrounded by these correspond to the first to third concave portions of the light emitting device 1000 . In this case, the maximum width of the recess formed by the side surface of each resin wall 400 on the light emitting element 50 side and the inner side surface 20 c may be equal to or less than the maximum width of the lens portion 70 .

<Modification 3>
FIG. 9 is a schematic top perspective view of a light emitting device 1003 of Modification 3. FIG.

A light-emitting device 1003 of Modification 3 differs from the light-emitting device 1000 shown in FIG. 2C and the like in that each light-emitting element 50 and a connection region for wire bonding are arranged in different concave portions.

In Modified Example 3, on main surface 100a of resin package 100, plurality of recesses 20 further includes at least one fourth recess 24 located in a region different from first recess 21 to third recess 23. FIG. In plan view, a plurality of fourth recesses 24 may be provided that are separated from each other. A region where any lead is exposed on the inner upper surface of each fourth recess 24 includes a connection region used for wire bonding. At least one of the first to third light emitting elements 51 to 53 is electrically connected to the connection area of the fourth recess 24 by a wire.

In the illustrated example, the plurality of recesses 20 includes first recesses 21 to third recesses 23, fourth recesses 241a and 241b located on both sides (±x sides) of the first recesses 21, and second recesses 22. It includes fourth recesses 242a and 242b located on both sides, and fourth recesses 243a and 243b located on both sides of the third recess 23, respectively.

One lead 11a, 12a, 13a of each lead pair has an exposed region 30a exposed to the inner upper surface of the recess 20 and an exposed region 30w exposed to the fourth recesses 241a, 242a, 243a. Each of the other leads 11b, 12b, 13b has an exposed region 30b exposed in the fourth recesses 241b, 242b, 243b. The first to third light emitting elements 51 to 53 are arranged in the first to third recesses 21 to 23, respectively. One electrodes of the first light emitting element 51 to the third light emitting element 53 are connected by wires to the exposed regions 30w of the leads 11a to 13a in the fourth recesses 241a to 243a, and the other electrodes are connected to the fourth recesses 241b to 243b. , are connected by wires to the exposed regions 30b of the leads 11b-13b.

A reflective member 150 is arranged in each of the first to third recesses 21 to 23 . On the other hand, it is preferable that the reflective member 150 is not arranged in each fourth concave portion 24 . For example, a second dark-colored resin member may be arranged in each fourth recess 24 so as to cover the connection portion with the wire.

According to this modification, by arranging the connection region for wire bonding in a recess separate from the light emitting element, the volume in which the first reflective member 151 is arranged can be reduced.

The illustrated example shows an example in which the fourth recesses 24 are arranged on both sides of each light emitting element 50 in plan view, but the fourth recesses 24 may be arranged only on one side of each light emitting element 50. good. For example, for each light emitting element 50, one recess including the element mounting area and the first connection area and one recess including the second connection area may be formed. Alternatively, when two or more light emitting elements 50 among the first to third light emitting elements 51 to 53 are connected to a common lead, the first connection region (or second connection) of the two or more light emitting elements 50 region) may be arranged in one fourth recess 24 .

Also in this modified example, the reflective member 150 arranged around each light-emitting element 50 enables the size reduction of the lens portion 70 . For example, as described above with reference to FIG. 6, the size ratio of the lens portion to the light emitting element may be 5.0 or less. In addition, in this modification, the maximum width of each lens portion 70 may be equal to or greater than the maximum width of the corresponding recess among the first to third recesses 21 to 23 on which the light emitting element 50 is placed.

<Modification 4>
10A is a schematic top perspective view of another light emitting device 1004 of Modification 4, and FIG. 10B is a cross-sectional view taken along line 10B-10B shown in FIG. 10A.

The light-emitting device 1004 of Modification 4 is different from the light-emitting device shown in FIG. Different from 1000.

In light emitting device 1004, main surface 100a of resin package 100 has one recess 25 defined by dark-colored resin member 40 and a plurality of leads 11a to 13b. In the illustrated example, the first to third light emitting elements 51 to 53 are arranged in the recess 25 in the exposed regions 30a of the leads 11a to 11c. A connection area for wire bonding in each of the leads 11a-13b is also arranged in the recess 25. As shown in FIG.

In the light emitting device 1004 , the reflective member 150 may be arranged throughout the recess 25 . Alternatively, as will be described later, by providing a resin wall inside the recess 25, the area where the reflective member 150 is arranged can be narrowed.

As shown in FIG. 10B , a precoat resin 180 may be arranged between the reflective member 150 and the mold resin portion 60 . In the recess 20, the upper surface of the reflective member 150 may be curved concavely between the light emitting elements 50, and the upper surface of the precoat resin 180 may be curved convexly. It is preferable that the thickness of the precoat resin 180 positioned on the upper surface of each light emitting element 50 arranged in the recess 20 is constant. The thickness of the precoat resin 180 positioned between the light emitting elements 50 arranged in the recess 20 is preferably symmetrical with respect to the center of the distance between the light emitting elements 50 as a starting point.

FIG. 11A is a schematic top perspective view of another light emitting device 1005 of Modification 4. FIG.

In light emitting device 1005, main surface 100a of resin package 100 has two recesses 21 and 26 defined by dark resin member 40 and a plurality of leads 11a to 13b. Two light emitting elements 50 (a second light emitting element 52 and a third light emitting element 53 in FIG. 11A) are arranged on the inner upper surface of the recess 26 . A reflective member 150 is arranged around the second light emitting element 52 and the third light emitting element 53 in the recess 26 .

The remaining one light emitting element 50 (the first light emitting element 51 in FIG. 11A) is arranged on the inner upper surface of the recess 21 . The arrangement and shape of the recess 21 , the first light emitting element 51 and the first reflective member 151 are the same as the recess 20 (the first recess 21 in FIG. 11A ) in the light emitting device 1000 .

The recess 26 has a structure in which the two recesses 20 (the second recess 22 and the third recess 23 in FIG. 11A) in the light emitting device 1000 are connected. In this example, the inner upper surface of the concave portion 26 includes a region 26A including the device mounting region dr on which the second light emitting device 52 is mounted and a region including the device mounting region dr on which the third light emitting device 53 is mounted. 26B and an intervening region 26C located between regions 26A and 26B. Region 26A, intervening region 26C and region 26B are arranged in the y-axis direction. In the example shown in FIG. 11A, the width in the x-axis direction of intervening region 26C is smaller than the width in the x-axis direction of regions 26A and 26B. In the example shown in FIG. 11A, regions 26A and 26B have the same width in the x-axis direction. Each of the regions 26A, 26B may further include a first connection region wr1 and a second connection region wr2 for wire bonding.

A plurality of resin walls 400 made of a dark-colored resin member 40 may be arranged inside the recess 26 . In this example, the plurality of resin walls 400 includes a pair of resin walls 402 arranged between the element mounting region dr and the first connection region wr1 and the second connection region wr2 in the region 26A, and in the region 26B, It includes an element mounting region dr and a pair of resin walls 403 arranged between the first connection region wr1 and the second connection region wr2. The resin walls 402 and 403 may be rectangular parallelepipeds, or may have the same shape as the resin wall 400 described in the second modification. In the example shown in FIG. 11A, the pair of resin walls 402 and the pair of resin walls 403 have a rectangular shape elongated in the y-axis direction. By providing the resin wall 400, the arrangement of the reflective member 150 can be controlled.

In the illustrated example, the reflective member 150 is arranged, for example, between the light emitting element 50 and the resin walls 402 and 403 in the regions 26A and 26B and in the intervening region 26C. Note that the reflective member 150 may be arranged over the entire recess 26 .

Also in this modification, both ends or one end of the resin walls 402 and 403 may be in contact with the inner surface of the recess 26 in plan view. When both ends of the resin walls 402 and 403 are in contact with the inner surface of the recess 26, the side surface of each resin wall 402 on the second light emitting element 52 side, the side surface of each resin wall 403 on the third light emitting element 53 side, and the recess 26 constitutes the inner side surface of one recess. A reflective member 150 may be positioned within the recess.

FIG. 11B is a schematic top view of still another light emitting device 1005a of Modification 4. FIG. The light emitting device 1005a shown in FIG. 11B differs from the light emitting device 1005 shown in FIG. 11A in that the widths of the regions 26A and 26B in the x-axis direction and the width of the intervening region 26C in the x-axis direction are the same. Other configurations are the same as those of the light emitting device 1005 .

FIG. 11C is a schematic top view of still another light emitting device 1005b of Modification 4. FIG. In the light-emitting device 1005b shown in FIG. 11C, the element mounting region dr on which the light-emitting element 50 is mounted and the connection region wr for wire bonding connecting the light-emitting element 50 and the lead are provided in different concave portions. It differs from the light emitting device 1005 shown in FIG. 11A in terms of location. In the example shown in FIG. 11C , in plan view, the fourth recesses 24 including the connection regions wr are arranged on both sides (±x sides) of the recesses 26 in which the second light emitting element 52 and the third light emitting element 53 are placed. It is Further, in plan view, fourth recesses 24 including connection regions wr are arranged on both sides of the recess 21 on which the first light emitting element 51 is placed. The recess 26 and the fourth recess 24 are defined by the resin wall 400 . The inner surface of the recess 26 extending in the y-axis direction and the inner surface of the fourth recess 24 extending in the y-axis direction are formed of a common resin portion 400 .

<Manufacturing Method of Light Emitting Device 1000>
An example of the method for manufacturing the light emitting device of this embodiment will be described below using the light emitting device 1000 as an example.

12A to 12F are process cross-sectional views for explaining the manufacturing method of the light emitting device 1000, and show cross sections taken along line 2D-2D shown in FIG. 2C.

(First step: preparation of resin package 100)
In the first step, as shown in FIG. 12A, a resin package 100 including a dark resin member 40 and a plurality of leads 10 is prepared. The resin package 100 can be formed by transfer molding, insert molding, or the like. Here, a method of forming the resin package 100 by transfer molding will be described.

First, a lead frame including a plurality of leads 10 is prepared. In this example, the plurality of leads 10 includes three pairs of leads for one package. Each lead pair includes leads 10a, 10b that are spaced apart.

Next, a mold is prepared and the leadframe is placed in the mold. Thereafter, a dark colored thermoplastic resin material is injected into the mold and cooled to solidify. As a result, a dark resin member 40 holding a plurality of leads 10 is formed. Thus, the resin package 100 is obtained.

A main surface 100 a of the resin package 100 has a plurality of recesses 20 . The leads 10a, 10b in each lead pair have exposed regions 30a, 30b on the inner top surface of the corresponding recess 20. As shown in FIG. The resin wall (Modification 2, etc.) arranged inside the recess 20 can be formed by the shape of the mold in this step.

(Second step: mounting of light emitting element 50)
In the second step, the light emitting element 50 is mounted on the resin package 100 as shown in FIG. 12B. First, on the main surface 100a of the resin package 100, the light emitting element 50 is bonded to a portion of the exposed region 30a of one lead 10a of each lead pair using, for example, non-conductive paste or conductive paste. A pair of wires 80a, 80b then electrically connect the positive and negative electrodes of each light emitting element 50 to the exposed regions 30a, 30b of the two leads 10a, 10b of the lead pair, respectively.

(Third step: formation of reflective member 150)
In the third step, a reflective member 150 is formed around each light emitting element 50 . In this example, as shown in FIG. 12C, the first resin material 150a is applied by a nozzle 800 around each light emitting element 50 (in this example, inside each concave portion 20 of the resin package 100).

When applying the first resin material 150a to the inner upper surface 20a of the recess 20 using the nozzle 800, the first resin material 150a can be applied while being in contact with the inner upper surface 20a of the recess 20, as illustrated in FIG. 12D. preferable. A distance H from the tip of the nozzle 800 to the inner upper surface 20a of the recess 20 can be set to, for example, 200 μm or more and 300 μm or less. If the distance H is too long, the direction in which the first resin material 150a is discharged from the opening of the nozzle 800 varies, and it may become difficult to control the application position of the first resin material 150a.

In this specification, of the inner upper surface 20a of the recess 20, a region 801 to which the tip of the nozzle 800 can be brought close is called a "nozzle placement region." A nozzle arrangement area 801 is a so-called "target" area in which nozzles are arranged aiming at that area, and it is preferable that the nozzle diameter is somewhat larger than the actual nozzle diameter. The width of the nozzle arrangement region 801 is, for example, set to be approximately equal to or larger than the outer diameter 800a of the tip of the nozzle 800, and preferably set to be larger than the outer diameter 800a of the nozzle 800. FIG. Here, the outer diameter 800a of the nozzle 800 is, for example, 200 μm or more and 300 μm or less. Therefore, the nozzle arrangement area 801 has a size larger than a circle, for example, with a diameter of 200 μm or more, preferably 300 μm or more.

The inner upper surface 20a of the concave portion 20 preferably includes sufficiently sized nozzle arrangement regions 801 on both sides (±x sides in this example) of the region where the light emitting element 50 is arranged. As a result, the first resin material 150a can be arranged in the vicinity of the light emitting element 50 from both sides of the light emitting element 50, so that the first resin material 150a can be easily arranged so as to cover the entire side surface of the light emitting element 50.

Thereafter, as shown in FIG. 12E, the reflective member 150 is obtained by curing the first resin material 150a. Subsequently, a second resin material may be applied onto the reflective member 150 and cured to form the precoat resin (Modification 2) or the colored resin member (Modification 1). By forming the next resin material after curing each resin material, each resin material can be cured under optimum conditions.

Alternatively, the first resin material 150a may be temporarily cured by heating at a temperature lower than the curing temperature, and the second resin material may be placed on the temporarily cured body. Thereafter, the temporarily cured body of the first resin material 150a and the second resin material may be heated at a temperature equal to or higher than the curing temperature to be fully cured. Alternatively, the mold resin portion may be formed in a state in which the first resin material 150a (and the second resin material) is temporarily cured. In this case, the first resin material 150a (and the second resin material) may be fully cured in the curing process for forming the molded resin portion. The time required for the main curing can be shortened by setting the temporary curing state, and the manufacturing time can be shortened.

Thus, the structure 110 in which the light emitting element 50 and the reflective member 150 are arranged on the main surface 100a of the resin package 100 is obtained.

(Fourth step: formation of mold resin portion 60)
In the fourth step, the mold resin portion 60 is formed using, for example, a transfer molding method. The mold resin portion 60 can be formed, for example, by the process described in Japanese Patent Application Laid-Open No. 2003-332634 filed by the present applicant.

First, as shown in FIG. 12F, the structure 110 is sandwiched between an upper mold 821 and a lower mold 822 and fixed while applying pressure. Upper mold 821 and lower mold 822 seal space 830 including light emitting element 50 .

Next, by flowing a third resin material having a thermosetting resin as a base material into the sealing space 830 in the y-axis direction, the sealing space 830 is sealed with the third resin. Air existing in the sealing space 830 is replaced with the third resin and discharged to the outside of the sealing space 830 . The third resin material is also placed inside the hole 45 (see FIG. 2C) provided in the resin package 100 .

After injecting the third resin material, the temperature of the mold is maintained at a temperature higher than the curing temperature of the third resin material (here, 150° C.) for a predetermined time. This cures the third resin material. After that, by removing the mold, a mold resin portion including a plurality of lens portions positioned above each light emitting element 50 is formed.

(Fifth step: Cutting lead 10)
Subsequently, the leads 10 are cut from the lead frame and separated into individual pieces. A light-emitting device 1000 is obtained by bending the cut lead 10 into a desired shape.

According to the manufacturing method of this embodiment, a plurality of lens portions and base portions can be integrally molded using the same mold. Therefore, it is possible to reduce the manufacturing cost and increase in the number of manufacturing steps. Also, the plurality of lens units can be stably held at predetermined positions.

The method for manufacturing the light emitting device of this embodiment is not limited to the above method. For example, a casting molding method may be used to form the molded resin portion.

FIG. 13 is a schematic side view illustrating a light-emitting device 1006 in which the mold resin portion 60 is formed using the casting molding method. When the casting molding method is used, after forming a structure in which the light emitting element 50 and the reflective member 150 are arranged on the main surface 100a of the resin package 100 in the same process as described above, this structure is molded into the resin in the casting case. The mold resin portion 60 is obtained by impregnating the material with the resin and curing the material. When the casting molding method is used, the mold resin portion 60 is formed to cover the upper surface of the resin package 100 and part of the side portion (here, the upper portion).

(Second embodiment)
FIG. 14 is a schematic perspective view of the light emitting device 2000 of the second embodiment according to the present disclosure with the mold resin portion 60 and the plurality of reflective members 151 to 153 removed. FIG. 15A is a schematic top perspective view of the light emitting device 2000. FIG. 15B and 15C are schematic cross-sectional views taken along lines 15B-15B and 15C-15C, respectively, shown in FIG. 15A. A perspective view of the light emitting device 2000 is the same as in FIG.

A light emitting device according to a second embodiment of the present disclosure will be described below with reference to the drawings. The light-emitting device of this embodiment differs from the light-emitting device 1000 shown in FIGS. 2B to 2E and the like in that the main surface 100a of the resin package 100 does not have the concave portion 20 for each light-emitting element 50. FIG.

Differences from the light emitting device 1000 of the first embodiment will be mainly described below, and descriptions of structures similar to those of the light emitting device 1000 will be omitted.

As shown in FIGS. 15A to 15C, a light emitting device 2000 includes a resin package 100 including a plurality of leads 11a to 13b and a resin member, a plurality of light emitting elements 50, a plurality of reflective members 151 to 153, and a plurality of and a mold resin portion 60 including a lens portion 70 .

Resin package 100 has first region 121, second region 122 and third region 123 defined by a plurality of leads 11a-13b and dark resin member 40 on main surface 100a. The first to third regions 121 to 123 (hereinafter sometimes collectively referred to as “regions 120”) are arranged separately from each other. Each region 120 includes an exposed region 30 where any of the plurality of leads 11a-13b are partially exposed.

The plurality of light emitting elements 50 includes a first light emitting element 51 arranged in the first region 121, a second light emitting element 52 arranged in the second region 122, and a third light emitting element 53 arranged in the third region 123. including. The first to third light emitting elements 51 to 53 are arranged in the exposed lead regions 30 of the first to third regions 121 to 123, respectively.

The plurality of reflective members includes first to third reflective members 151 to 153 spaced apart from each other. The first reflective member 151 is arranged in the first region 121 and positioned around the first light emitting element 51 in plan view. The second reflective member 152 is arranged in the second region 122 and positioned around the second light emitting element 52 in plan view. The third reflective member 153 is arranged in the third region 123 and located around the third light emitting element 53 in plan view.

Also in this embodiment, similarly to the first embodiment, by providing the lens portion 70 on the emission side of each light emitting element 50, light can be extracted in the front direction with high efficiency. Further, by arranging the reflective members 151 to 153 around each light emitting element 50, the light emitted from the light emitting element 50 can be made into a point light source. Thereby, the size of the lens portion 70 can be reduced.

In the light-emitting device 2000 of this embodiment as well, two or more light-emitting elements 50 overlap each other in a side view from the y-axis direction, as in the light-emitting device of the above-described embodiments. In a side view from the x-axis direction perpendicular to the y-axis, the maximum width of the first lens portion 71 is five times or less the maximum width of the first light emitting element 51, and the maximum width of the second lens portion 72 is the second light emission. The maximum width of the element 52 is five times or less, and the maximum width of the third lens portion 73 may be five times or less of the maximum width of the third light emitting element 53 (see FIG. 6). Accordingly, the light emitting device 2000 can be further miniaturized.

In this embodiment, on the main surface 100a of the resin package 100, the dark-colored resin member 40 may include a plurality of resin walls 300 spaced apart from each other. The plurality of resin walls 300 includes at least one first resin wall 301 defining part of the periphery of the first reflecting member 151 and at least one second resin wall 301 defining part of the periphery of the second reflecting member 152 . It includes a resin wall 302 and at least one third resin wall 303 that defines part of the periphery of the third reflective member 153 . The first to third resin walls 301 to 303 are arranged near the first to third regions 121 to 123, respectively.

The plurality of resin walls 300 includes two or more first resin walls 301 separated from each other, two or more second resin walls 302 separated from each other, and two or more separated from each other. and a third resin wall 303 of In the illustrated example, in plan view, a pair of first resin walls 301 are arranged so as to face each other with the first light emitting element 51 interposed therebetween. 1 resin wall 301 . Similarly, in plan view, a pair of second resin walls 302 facing each other with the second light emitting element 52 interposed therebetween and a pair of third resin walls 303 facing each other with the third light emitting element 53 interposed therebetween are arranged. there is At least part of the second reflecting member 152 is positioned between the pair of second resin walls 302, and at least part of the third reflecting member 153 is positioned between the pair of third resin walls 303. there is

In the present embodiment, each light emitting element 50 can be arranged within a region defined by two or more resin walls 300 in plan view. As a result, the first resin material 150a (FIG. 12D), which becomes the reflective members 151 to 153, is placed in the vicinity of the light emitting element 50 from the outside of the region defined by the resin walls 300 through the gap between the two adjacent resin walls 300. and FIG. 30C), which will be described later, can be applied. Therefore, the reflective members 151 to 153 are arranged in a narrower region close to the light emitting element 50 while ensuring sufficient space that can function as a nozzle arrangement region in which the nozzle for applying the first resin material 150a can be arranged. can. In addition, since the resin wall 300 can reduce the volume of the reflective members 151 to 153 positioned around the light emitting element 50 and the reflective members 151 to 153 are not completely surrounded by the resin wall 300, the mold resin The stress applied to the light emitting element 50 from the reflective members 151 to 153 during molding of the portion 60 (during heat treatment for curing) can be more effectively relieved. Therefore, the lifting of the light emitting element 50 from the leads 11a to 13a can be effectively reduced.

Each component will be described in more detail below.

[Area 120]
A region 120 is a region in which one light emitting element 50 and reflective members 151 to 153 positioned around it are arranged.

A more specific structure of the region 120 will be described below using the first region 121 as an example. In addition, in various light emitting devices of the present embodiment, the first to third regions may have similar structures. Also, the first to third resin walls may have similar structures. In this specification, in order to avoid duplication of description, the first region or the first resin wall may be illustrated and described, and description of other regions or other resin walls may be omitted. Furthermore, although it is preferable that all of the first to third regions have the structure described with the first region as an example, at least one of the first to third regions may have the structure. Similarly, it is preferable that all of the first to third resin walls have the structure described with the first to third resin walls as an example, but at least one of the first to third resin walls is It's fine if you have it.

15D is an enlarged plan view showing first region 121 in resin package 100 of light emitting device 2000. FIG. In FIG. 15D, the first light emitting element 51 is indicated by a dotted line. The mold resin portion 60 is removed.

The first region 121 includes a first portion P1 defined by two or more resin walls 301 in plan view. The first portion P1 is, for example, a portion located between the pair of resin walls 301a and 301b. The first portion P1 is connected to a region located outside the first portion P1 through a gap between the resin walls 301a and 301b. The first light emitting element 51 and at least part of the reflective member 151 are arranged in the first portion P1.

In the illustrated example, the first region 121 includes a first portion P1 located between the pair of first resin walls 301a and 301b and a pair of second portions P2 in plan view. The first resin walls 301a and 301b are opposed to each other with the first light emitting element 51 sandwiched in the first direction (x-axis direction in this example) D1 in plan view. The pair of second portions P2 are located across the first portion P1 in a second direction (here, the y-axis direction) D2 orthogonal to the first direction D1. Each second portion P2 is in contact with the first portion P1. That is, each second portion P2 is connected to the first portion P1.

The lead 11a is exposed in the first portion P1. In this example, the entire first portion P1 is the exposed region 30a of the lead 11a.

The first portion P1 includes an element mounting region dr in which the first light emitting element 51 is arranged in plan view. In this example, in a plan view, portions of the first resin walls 301a and 301b (second wall portions 2a and 2b to be described later) are positioned between the element mounting region dr and each of the second portions P2. .

A first reflective member 151 is arranged on at least part of the first portion P1. Preferably, the first reflective member 151 is arranged to surround the light emitting element 50 . The first reflective member 151 may be in contact with the side surface of the light emitting element 50 and the side surfaces of the first resin walls 301a and 301b on the first light emitting element 51 side.

The maximum width p1 of the first portion P1 in the first direction D1 may be, for example, 1.1 to 2 times the width of the first light emitting element 51 in the first direction D1. The width p2 of the first portion P1 in the second direction D2 may be, for example, two to four times the width of the first light emitting element 51 in the second direction D2.

In each of the pair of second portions P2, the dark resin member 40 may be exposed, or one of the leads 11a and 11b may be exposed. The second portion P2 and the first portion P1 may be flush with each other. As a result, the first resin material 150a (FIG. 30C, which will be described later) that becomes the first reflective member 151 can be easily caused to flow from the second portion P2 side to the first portion P1 side.

A width q1 along the first direction D1 of each second portion P2 may be greater than or equal to a width p1 along the first direction D1 of the first portion P1. In this example, the width q1 of the second portion P2 is the same as the width p1 of the first portion P1. The width q1 of each second portion P2 may be greater than the width p1 of the first portion P1.

According to the above configuration, on both sides of the first light emitting element 51 in the second direction D2, relatively wide regions 801 each including the partial region sr of the first portion P1 and the second portion P2 can be formed. . This region 801 has a size that enables arrangement of nozzles for applying the first resin material 150a (FIG. 30C, which will be described later) that will become the first reflective member 151, and is used as the aforementioned "nozzle arrangement region". be able to. In this specification, a region sr that is part of the first portion P1 located between the pair of resin walls and that can form the nozzle arrangement region together with the second portion P2 is called a "side region."

In addition, the space that can function as the nozzle arrangement region 801 is preferably formed on both sides of the first light emitting element 51 , but may be formed on only one side of the first light emitting element 51 .

[Resin wall 300]
As shown in FIGS. 15A to 15C, each of the plurality of resin walls 300 is a wall-shaped or columnar resin portion having an upper surface (or upper portion) located above the exposed regions 30 of the leads 11a to 13b.

Each resin wall 300 is located in the vicinity of one of the regions 120 in a plan view, and defines part of the periphery of the reflective members 151-153. Each resin wall 300 may have a side surface in direct contact with the corresponding reflective members 151-153. The resin wall 300 is arranged near the corresponding light emitting element 50 and away from the light emitting element 50, and at least a part of the reflective members 151 to 153 is positioned between the light emitting element 50 and the resin wall 300. is preferred.

The plurality of resin walls 300 may include a resin wall positioned between each light emitting element 50 and at least one of the first connection region and second connection region of the two leads connected to each light emitting element 50 .

In this embodiment, the positions of the reflective members 151 to 153 and the heights of the upper surfaces of the reflective members 151 to 153 can be controlled by the position and height of the resin wall 300, the shape of the side walls, and the like. For example, when the resin wall 300 extends along one of the side surfaces of the light emitting element 50 in plan view, the distance between the side surface of the resin wall 300 on the side of the light emitting element 50 and the light emitting element 50 affects the reflective member 151. 153, the thickness of the portion covering the side surface of the light emitting element 50 can be controlled.

Also, by providing the resin wall 300, the arrangement area of each of the reflective members 151 to 153 can be reduced. For example, in plan view, the first reflecting member 151 is positioned inside the first lens portion 71, the second reflecting member 152 is positioned inside the second lens portion 72, and the third reflecting member 153 is positioned inside the second lens portion 72. It may be positioned inside the three-lens portion 73 .

The shape and structure of the resin wall 300 and the positional relationship between the light emitting element 50 and the reflective members 151 to 153 will be specifically described below with reference to FIG. 15D, taking the first resin wall 301 as an example.

As described above, the first resin wall 301 includes a pair of first resin walls 301a and 301b facing each other with the first light emitting element 51 interposed in the first direction (x-axis direction in this example) D1 in plan view. include. The first resin wall 301a is located on the +x side of the first light emitting element 51, and the first resin wall 301b is located on the -x side of the first light emitting element. In plan view, the first resin walls 301a and 301b may face each other along two sides of the first light emitting element 51 facing each other with the first light emitting element 51 interposed therebetween.

The first resin wall 301a includes, in plan view, a first wall portion 1a extending in the second direction D2 and a pair of second wall portions extending in parallel to the first direction D1 from the first wall portion 1a toward the first resin wall 301b. wall 2a. The first wall portion 1a and the second wall portion 2a are integrally formed (that is, connected). Similarly, the first resin wall 301b includes a first wall portion 1b extending in the second direction D2 and a pair of second walls extending parallel to the first direction D1 from the first wall portion 1b toward the first resin wall 301a. and part 2b. The first wall portion 1b and the second wall portion 2b are integrally formed. In plan view, the length of the second walls 2a and 2b in the first direction D1 is, for example, less than half the width p1 of the first portion P1 (here, the interval between the first walls 1a and 1b). .

Each second wall portion 2a of the first resin wall 301a and each second wall portion 2b of the first resin wall 301b face each other with an interval d therebetween. The distance d is smaller than the width q1 of the second portion P2 and the width p1 of the first portion P1. The distance d may be smaller than the width of the light emitting element 50 along the first direction D1. When the first resin material 150a (FIG. 30C described later) is applied using capillary action as described later, the distance d may be, for example, 100 μm or more and 200 μm or less.

The first light emitting element 51 is arranged inside a region defined by the first walls 1a, 1b and the second walls 2a, 2b. The distances between the first light emitting element 51 side surfaces of the first walls 1a and 1b and the second walls 2a and 2b and the first light emitting element 51 are each, for example, 300 μm or less, preferably 100 μm or more and 200 μm or less. is.

[Flow of first resin material from nozzle arrangement region 801]
The flow of the first resin material 150a (FIG. 30C described later) applied to the nozzle arrangement region 801 will be described with reference to FIG. 15D. The first resin material is a resin material that is cured to become the reflective member.

A nozzle arrangement area 801 is an area in which nozzles for applying the first resin material can be arranged, and is a target area when arranging the nozzles. When using nozzles of the sizes described above with reference to FIG. 12D, nozzle placement area 801 may have a size greater than circular, for example with a diameter of 200 μm or more, preferably 300 μm or more.

In this embodiment, the nozzle arrangement area 801 is positioned outside the area defined by the plurality of resin walls 300 in plan view. In this example, a region 801 including the side region sr which is part of the first portion P1 and the second portion P2 is the "nozzle arrangement region." In the illustrated example, the side region sr is a region of the first portion P1 located outside the second wall portion 2b of each of the first resin walls 301a and 301b.

When a nozzle is arranged in the nozzle arrangement region 801 located on the +y side of the first portion P1 in a plan view and the first resin material is discharged, the first resin material is caused by capillary action as indicated by an arrow 802. It passes through the space d between the first resin walls 301a, 301b and flows into the area defined by the first walls 1a, 1b and the second walls 2a, 2b. The first resin material is pulled by the surface tension to the exposed regions of the leads 11a and 11b or the corners formed by the first resin portion 41 (FIG. 15B) and the first resin wall 301, thereby flowing into the first resin material from the gap d. 1 resin material wraps around from the +y side of the first light emitting element 51 to the ±x side as well. The same applies when the nozzles are arranged in the nozzle arrangement region 801 located on the -y side of the first portion P1. side to ±x side. In this way, it is possible to arrange the first resin material so as to be in contact with all side surfaces of the first light emitting element 51 . A portion of the first resin material may remain in the side region sr, the second portion P2, or both.

[Detailed structure of first resin wall 301]
Each structure of the first resin walls 301a and 301b will be described in more detail. Although the first resin wall 301a will be described below as an example, the first resin wall 301b may also have a similar structure.

15E is an enlarged perspective view of the pair of first resin walls 301. FIG.

As shown in FIG. 15E , the first wall portion 1a of the first resin wall 301a is located on the first light emitting element 51 side, and has a first side surface 1s in contact with the first reflective member 151, a second side surface 1v, It includes an upper surface (or upper portion) 1u located between the first side surface 1s and the second side surface 1v, and a tapered surface 1t located between the first side surface 1s and the upper surface 1u. The first side surface 1s may be parallel to the side surface of the first light emitting element 51 (the side surface corresponding to the first wall portion 1a). The upper surface 1u is located above the upper end of the first side surface 1s. The tapered surface 1t is inclined from the upper end of the first side surface 1s toward the upper surface 1u. The second side surface 1v may be a tapered surface that slopes downward from the upper surface 1u toward the exposed region 30a of the lead 11a.

Each second wall portion 2a of the first resin wall 301 is located between the first side surface 2s located on the first light emitting element 51 side, the second side surface 2v, and the first side surface 2s and the second side surface 2v. It includes an upper surface (or upper portion) 2u and a tapered surface 2t located between the first side surface 2s and the upper surface 2u. The second side surface 2v may be a tapered surface or a surface perpendicular to the xy plane.

The upper surface 1u of the first wall portion 1a and the upper surface 2u of the second wall portion 2a are connected. The tapered surface 1t of the first wall portion 1a may include a fan-shaped surface at the corner portion between the second wall portion 2a and the first wall portion 1a so as to be continuous with the tapered surface 2t of the second wall portion 2a.

Since the first resin wall 301 has the above structure, the height of the upper surface of the first reflecting member 151 can be controlled by the height hs of the first side surfaces 1s and 2s. The height hs of the first side surfaces 1 s and 2 s may be approximately the same as the height of the first light emitting element 51 or may be smaller than the height of the first light emitting element 51 . This can reduce the flow of the first reflective member 151 onto the upper surface of the first light emitting element 51 .

The height hu of the upper surfaces 1 u and 2 u is preferably greater than the height of the first light emitting element 51 . When forming a precoat resin such as the colored resin members 161 to 163 on the first reflective member 151, the upper surfaces 1u and 2u can be used to control the thickness of the precoat resin (height of the upper surface of the precoat resin). . The upper surfaces 1u and 2u may be positioned below the upper surface of the second resin portion 42 (FIG. 15B). By adjusting the height between the upper surfaces 1u and 2u of each resin wall 300 and the upper surface of the second resin portion 42 (FIG. 15B), the thickness of the precoat resin can be made more uniform, and the thickness of the precoat resin can be increased to a certain level or more. Thickness can be secured.

In addition, since the first resin wall 301 has the tapered surfaces 1t and 2t with the upper surfaces 1u and 2u being the uppermost parts, the light from the light emitting element 50 can reach the upper surface 1u and the upper surface 1u of the first resin wall 301 higher than the light emitting element 50. Blocking by 2u can be reduced. Furthermore, since the second side surface 1v of the first wall portion 1a has a tapered surface that becomes lower as it moves away from the upper surface 1u, the wire loop is prevented from coming into contact with the first wall portion 1a when the wire loop is formed. can be reduced.

In this specification, the height of each component such as the first light emitting element 51 and the first resin wall 301 arranged on the main surface 100a of the resin package 100 (including the heights hs and hu) is mainly It is the distance in the z-axis direction from the exposed area of the lead exposed on surface 100a to the top surface (or top) of the component.

[Resin groove 46]
As shown in FIG. 15A, the dark-colored resin member 40 may include at least one resin groove (sometimes referred to as a "third portion") 46 positioned outside each region 120 in plan view. The upper surface of the resin groove 46 may be positioned below (-z direction) the exposed regions 30 of the leads 11a to 13b, for example. The resin groove 46 may be a groove or depression formed in the first resin portion 41 of the dark-colored resin member 40 . The resin groove 46 is at least partially in contact with the second portion P2 in plan view. The upper surface of the resin groove 46 is located below the upward surfaces of the first portion P1 and the second portion P2.

By providing the resin groove 46 so as to be in contact with the second portion P2, when forming the first reflective member 151, the first resin material 150a ejected into the nozzle arrangement region 801 using the surface tension. (FIG. 30C) can be reduced from flowing out from the second portion P2 in a direction different from the element mounting region dr.

At least one resin groove 46 should be arranged for each region 120 . A plurality of resin grooves 46 may be arranged for each region 120 . The plurality of resin grooves 46 may include two resin grooves 46 arranged to sandwich the second portion P2 in the first direction D1 in plan view.

Although the depth of each resin groove 46 is not particularly limited, it may be, for example, 100 μm or more and 200 μm or less. The depth of the resin groove 46 is the distance from the exposed region 30 of the leads 11a to 13b to the bottom of the resin groove 46 in the z-axis direction.

It is preferable that the resin groove 46 is arranged so as to define a part of the peripheral edge of the nozzle arrangement area 801 in which the nozzle is intended to be arranged. As a result, the first resin material 150 a ( FIG. 30C ) applied to the nozzle arrangement region 801 can be more effectively guided to the region close to the light emitting element 50 .

In the example shown in FIG. 15D, the resin grooves 46a to 46e are arranged in the first region 121 so as to be spaced apart from each other. In plan view, one of the second portions P2 is sandwiched between the resin grooves 46a and 46b in the first direction D1, and the other of the second portions P2 is sandwiched between the resin grooves 46d and 46e in the first direction D1. A width q1 of each second portion P2 in the first direction D1 is defined by these resin grooves 46 . The resin groove 46c is located between the resin grooves 46a and 46b in plan view. As a result, the first reflective member 151 can be more effectively prevented from flowing out to the adjacent other region 120 (the second region 122 in this example). Also, the number of resin grooves 46c that is one less than the number of light emitting elements may be provided. The resin grooves 46a to 46c may be three separate grooves or an integrally formed U-shaped groove.

[Recess 27]
As shown in FIGS. 15A to 15C, main surface 100a of resin package 100 may have recess 27 defined by leads 11a-13b and dark-colored resin member . In the illustrated example, the inner upper surface of the recess 27 includes first to third regions 121 to 123 . For example, the concave portion 27 has a substantially rectangular shape in plan view. In plan view, the plurality of resin walls 300 and the plurality of resin grooves 46 made of the dark-colored resin member 40 are positioned inside the recess 27 . In addition, the structure of the recessed part 27 is not limited to the above. The inner upper surface of the recess 27 includes at least two regions 120 including the first region 121 out of the first region 121 to the third region 123, and at least one first resin wall 301 is positioned inside the recess 27. All you have to do is

The dark-colored resin member 40 has a first resin portion 41 exposed on the inner upper surface of the recess 27 and a second resin portion 42 surrounding the inner upper surface of each recess 20 . The upper surface of the second resin portion 42 is positioned above (in the +z direction) the upper surface of the first resin portion 41 . The second resin portion 42 may be a wall surrounding the recess 20 . The height h1 of the upper surface of the second resin portion 42 may be greater than the height hu of the upper surface (or the highest portion) of the resin wall 300 .

A translucent precoat resin (a translucent resin member) may be placed in the recess 27 so as to cover at least the first light emitting element 51 and the first reflective member 151 . In this example, colored resin members 161 to 163 are arranged in the concave portion 27 as the precoat resin.

[Colored resin members 161 to 163]
As shown in FIGS. 15A to 15C, light emitting device 2000 includes colored resin members 161 to 163 as precoating resin between main surface 100a of resin package 100 and mold resin portion 60. As shown in FIGS. The materials and effects of the colored resin members 161 to 163 are the same as those of Modification 1 described above.

In the present embodiment, the first light emitted by the first light emitting element 51, the second light emitted by the second light emitting element 52, and the third light emitted by the third light emitting element 53 have different wavelengths. The colored resin members are a first colored resin member 161 colored in the same color as the first light, a second colored resin member 162 colored in the same color as the second light, and colored in the same color as the third light. and a third colored resin member 163 .

In plan view, at least part of the first colored resin member 161 is positioned in the first region 121, at least part of the second colored resin member 162 is positioned in the second region 122, and the third colored resin member 163 is positioned. is located in the third region 123 . At least a portion of the first colored resin member 161 is positioned on the first reflective member 151, at least a portion of the second colored resin member 162 is positioned on the second reflective member 152, and a third colored resin member At least a portion of member 163 may be located on third reflective member 153 . In plan view, the first to third colored resin members 161 to 163 may overlap the first to third light emitting elements 51 to 53, respectively.

In the illustrated example, the first to third colored resin members 161 to 163 are arranged inside the recess 27 . Each of the first to third colored resin members 161 to 163 may be in contact with part of the inner surface of the recess 27 . A region R1 where the first colored resin member 161 and the second colored resin member 162 overlap may be arranged between the first region 121 and the second region 122 in plan view. Similarly, a region R2 where the second colored resin member 162 and the third colored resin member 163 overlap may be arranged between the second region 122 and the third region 123 .

<Modification 5>
FIG. 16 is a schematic perspective view of the light emitting device 2001 of Modification 5 from which the mold resin portion 60 and the reflective members 151 to 153 are removed. FIG. 17A is a schematic top perspective view of the light emitting device 2001. FIG. 17B and 17C are schematic cross-sectional views taken along lines 17B-17B and 17C-17C, respectively, shown in FIG. 17A.

A light-emitting device 2001 of this modified example differs from the above-described light-emitting device 2000 in that a pair of resin walls 310 are arranged to sandwich the light-emitting element 50 in the y-axis direction in plan view. In this modification, the first direction D1 is the y-axis direction.

The plurality of resin walls 310 in this modification includes a pair of first resin walls 311 that partially define the periphery of the first reflecting member 151 and a pair of resin walls that partially define the periphery of the second reflecting member 152 . It includes a second resin wall 312 and a pair of third resin walls 313 that partially define the periphery of the third reflective member 153 . Each of the first to third resin walls 311 to 313 has a rectangular planar shape elongated in the x-axis direction.

Referring to FIG. 17A, the structure of region 120 in this modification will be described using first region 121 as an example. The first region 121 includes a first portion P1 positioned between the pair of first resin walls 311a and 311b, and a pair of walls facing each other across the first portion P1 in the second direction D2 (here, the x-axis direction). and a second portion P2.

The first portion P1 includes, in plan view, an element mounting region dr in which the first light emitting element 51 is arranged, and side regions sr located between the element mounting region dr and each second direction D2. Each second portion P2 is in contact with the side region sr of the first portion P1. The width of the second portion P2 is greater than the width of the first portion P1 in the first direction D1. As shown, the pair of second portions P2 may each include connection regions wr1 and wr2 for wire bonding.

In this modification, too, nozzle arrangement regions 801 in which nozzles can be arranged, including side regions sr that are part of the first portion P1 and the second portion P2, are formed on both sides of the first light emitting element 51 in the second direction D2. can be formed.

The first portion P1 may be positioned between the first connection region wr1 of the lead 11a and the second connection region wr2 of the lead 11b in plan view. In this case, in plan view, the pair of wires may each extend from the first light emitting element 51 across the gap between the first resin walls 311a and 311b to the first connection region wr1 and the second connection region. . As a result, the wire can be easily and stably arranged using the space between the pair of resin walls 310 .

In the illustrated example, the planar shape of each of the first resin walls 311a and 311b is, for example, a rectangle extending in the second direction D2 (here, the y-axis direction). Each of the first resin walls 311a and 311b has a first side surface 1s located on the side of the first light emitting element 51, a second side surface 1v located on the opposite side to the first side surface 1s, and the first side surface 1s and the second side surface 1v. and an upper surface 1u located between. As shown in FIG. 17C , the height hu of the upper surface 1 u is greater than the height of the upper surface of the first light emitting element 51 . The height hu may be substantially the same as the height h1 of the upper surface of the second resin portion 42, for example.

Also in this modified example, the dark-colored resin member 40 may have at least one resin groove 46 around the first region 121 .

17D and 17E are enlarged plan views illustrating the first region 121 in the resin package 100 of this modification, respectively. As shown in FIG. 17D, in a plan view, a resin groove 46f extending in the x-axis direction so as to be in contact with the ends of the two second portions P2 on the +y side and the ends of the two second portions P2 on the -y side A resin groove 46g extending in the x-axis direction may be arranged so as to be in contact with the . Alternatively, as shown in FIG. 17E, two resin grooves 46h and 46i in contact with the +y side end of each second portion P2 and two resin grooves 46j in contact with the −y side end of each second portion P2. , 46k may be spaced apart from each other.

<Modification 6>
FIG. 18 is a schematic perspective view of the light emitting device 2002 of Modification 6 with the mold resin portion 60 and the reflective members 151 to 153 removed. 19A is a schematic top perspective view of light emitting device 2002. FIG. 19B and 19C are schematic cross-sectional views taken along lines 19B-19B and 19C-19C, respectively, shown in FIG. 19A. 19D is an enlarged plan view showing first region 121 in resin package 100 of light emitting device 2000. FIG.

As shown in FIGS. 19A and 19D , the plurality of resin walls 320 in this modification includes a pair of first resin walls 321 arranged in the y-axis direction with the first light emitting element 51 interposed therebetween, as in the fifth modification. , a pair of second resin walls 322 arranged in the y-axis direction with the second light emitting element 52 interposed therebetween, and a pair of third resin walls 323 arranged in the y-axis direction with the third light emitting element 53 interposed therebetween. include. In this modification, the first direction D1 is the y-axis direction.

Each resin wall in Modification 5 has a rectangular planar shape, but the planar shape of each resin wall 320 in Modification 6 is concave on one side of the rectangle (the corresponding side on the light emitting element side). A curved notch is formed. Each light emitting element 50 is positioned between the cutout portions of the pair of resin walls 320 in plan view.

Taking the first resin wall 321 as an example, the structure of the resin wall 320 will be described more specifically. 19E is an enlarged perspective view of the pair of first resin walls 321. FIG.

As shown in FIG. 19E, each of the first resin walls 321a and 321b has a shape obtained by cutting a part of a rectangular parallelepiped. The first resin walls 321a and 321b are composed of a first side surface 3s, a second side surface 3v located opposite to the first side surface 3s, a top surface 3u located between the first side surface 3s and the second side surface 3v, and a top surface 3v. It has a tapered surface 3t located between 3u and the first side surface 3s.

The first side surface 3s includes a curved portion 3s1 having a concavely curved surface with respect to the first light emitting element 51, and planar portions 3s2 positioned on both sides of the curved portion 3s1 in the second direction D2. In this example, both the curved portion 3s1 and the planar portion 3s2 are perpendicular to the xy plane. The curved portion 3s1 is curved in an arc shape when viewed from above. The curved portion 3s1 is, for example, a concave arc surface. The tapered surface 3t is in contact with the curved portion 3s1, the planar portion 3s2 and the upper surface 3u. The tapered surface 3t may have a shape defined by a pair of arcuate portions parallel to each other and straight lines parallel to the x-axis direction located at both ends of the arcuate portions in plan view.

In this modification, the curved portions 3s1 of the first resin walls 321a and 321b are opposed to each other in plan view, and the first light emitting element 51 is arranged between the first resin walls 321a and 321b. The area of the first portion P1 can be reduced. Therefore, the volume of the first reflecting member 151 can be reduced. Moreover, by forming the tapered surface 3 t , the light from the light emitting element 50 can be prevented from being blocked by the upper surface 3 u of the first resin walls 321 a and 321 b higher than the light emitting element 50 .

Also in this modification, as shown in FIG. 19D, on both sides of the first light emitting element 51 in the second direction D2, there are nozzle arrangement regions where nozzles including the side region sr of the first portion P1 and the second portion P2 can be arranged. 801 can be formed. In this modified example, the distance d between the first resin walls 321a and 321b (the distance between the facing flat portions 3s2) can be reduced in plan view. Therefore, when the nozzle is used to apply the first resin material 150a (FIG. 13C), capillarity can be used as in the case of the light emitting device 1000 (FIG. 15D).

In the example shown in FIG. 19D, in plan view, a pair of resin grooves 46f and 46g are arranged so as to sandwich the first portion P1 and the second portion P2. Four resin grooves 46h to 46k may be formed sandwiching P2 in the first direction D1.

<Modification 7>
FIG. 20 is a schematic perspective view of the light emitting device 2003 of Modification 7 with the mold resin portion 60 and the reflective members 151 to 153 removed. FIG. 21 is a schematic enlarged top view showing one region 120 (here, the first region 121) in the resin package 100 of the light emitting device 2003. FIG.

As shown in FIG. 20 , the plurality of resin walls 330 in this modification includes a pair of first resin walls 331 arranged in the y-axis direction with the first light emitting element 51 interposed therebetween, and a second resin wall 331 with the second light emitting element 52 interposed therebetween. A pair of second resin walls 332 arranged in the y-axis direction and a pair of third resin walls 333 arranged in the y-axis direction with the third light emitting element 53 interposed therebetween are included. In this modification, the first direction D1 is the y-axis direction.

As shown in FIG. 21, the pair of first resin walls 331a and 331b in this modified example are located on the side opposite to the first side surface 4s curved concavely with respect to the corresponding light emitting element 50 and the first side surface 4s. , a second side surface 4v parallel to the first side surface 4s, an upper surface 4u located between the first side surface 4s and the second side surface 4v, and a tapered surface 4t located between the first side surface 4s and the second side surface 4v. have 4 t of taper surfaces incline so that it may become high as it goes to the upper end of the 2nd side surface 4v from the upper end of the 1st side surface 3s. The first side surface 4s is, for example, perpendicular to the xy plane. The first side surface 4s is, for example, a concave arc surface. The shape of the tapered surface 3t is, for example, an annular fan shape.

In each resin wall 321 in Modification 6, a curved portion 3s1 and a tapered surface 3t are formed on the light emitting element side by cutting a part of the rectangular parallelepiped (see FIG. 19E). On the other hand, in this modified example, each resin wall is formed by cutting a part of the hollow cylinder (more specifically, a part of the cylinder obtained by cutting the hollow cylinder along a plane perpendicular to the xy plane). A curved first side surface 4s, which is a part of the inner surface of the hollow columnar body, and an annular fan-shaped taper surface 4t are formed.

The first side surface 4s and the tapered surface 4t in this modified example have shapes corresponding to the curved portion 3s1 and the tapered surface 3t of the resin wall 321 in the modified example 6 shown in FIG. 19E. Therefore, the resin wall of Modification 7 also has the same effect as Modification 6. Specifically, in a plan view, by arranging the first light emitting element 51 between the curved first side surfaces 4s of the first resin walls 331a and 331b, the first light emitting element 51 positioned between the first resin walls 331a and 331b is arranged. The area of one portion P1 can be reduced. Therefore, the volume of the first reflecting member 151 can be reduced. In addition, since the distance d between the first resin walls 331a and 331b can be reduced, capillary action can be used when applying the first resin material 150a using a nozzle. Since the first resin walls 331 a and 331 b have the tapered surfaces 4 t , the light from the light emitting element 50 is less likely to be blocked by the upper surfaces 4 u of the first resin walls 321 a and 321 b higher than the light emitting element 50 .

A fourth resin portion 47 positioned above the first resin portion 41 may be arranged so as to connect the first resin portion 41 and the second side surfaces 4v of the respective resin walls 331a and 331b. Moreover, it may have a resin groove 46 like another modified example.

<Modification 8>
The light-emitting device of Modification 8 differs from the above-described light-emitting device in that two pairs of resin walls are arranged for one light-emitting element.

FIG. 22 is a schematic perspective view of a light-emitting device 2004 of Modification 8 from which the mold resin portion 60 and the reflective members 151 to 153 are removed. FIG. 23 is a schematic enlarged top view showing one region 120 (here, the first region 121) in the resin package 100 of the light emitting device 2003. FIG.

The plurality of resin walls 340 in this modification includes two pairs of first resin walls 341 , two pairs of second resin walls 342 and two pairs of third resin walls 343 . The first to third light emitting elements 51 to 53 have a rectangular planar shape. The two pairs of first resin walls 341 face each other across two sets of sides of the square of the first light emitting element 51 that face each other in plan view. Similarly, the two pairs of second resin walls 342 face each other across two sets of sides of the square of the second light emitting element 52 that face each other in plan view, and the two pairs of third resin walls 343 face each other in plan view. They face each other with two sets of sides of the square of the third light emitting element 53 facing each other.

An example of the structure of the first region 121 and the first resin wall 341 will be described with reference to FIG. 23 .

The first resin walls 341a to 341d are arranged between a pair of first resin walls 341a and 341b arranged to sandwich the first light emitting element 51 in the x-axis direction (first direction D1). , another pair of first resin walls 341c and 341d arranged to sandwich the first light emitting element 51 in the y-axis direction (second direction D2). In the illustrated example, the first portion P1 of the first region 121 is a portion located between the first resin walls 341a and 341b. The first resin walls 341c and 341d are arranged in the first portion P1.

The first resin walls 341a and 341b have a rectangular planar shape elongated in the y-axis direction. The first resin walls 341a and 341b have the same structure as the first wall portion 1a of the first resin walls 301a and 301b in the light emitting device 2000 shown in FIGS. 14 to 15E. That is, the first resin walls 341a and 341b differ from the first resin walls 301a and 301b (FIG. 15E) in the light emitting device 2000 in that they do not have the second wall portion 2a.

The first resin walls 341c and 341d have a rectangular planar shape. The first resin walls 341c and 341d are arranged at intervals d1 and d2 from the first side faces 1s of the first resin walls 341a and 341b, respectively.

The first resin walls 341 c and 341 d have the same structure as the second walls 2 a and 2 b of the first resin walls 301 a and 301 b of the light emitting device 2000 . Specifically, each of the first resin walls 341c and 341d has a first side surface 5s located on the side of the first light emitting element 51, a second side surface 5v located on the opposite side of the first side surface 5s, and a first side surface 5v. It has an upper surface 5u positioned between 5s and the second side surface 5v, and a tapered surface 5t positioned between the upper surface 5u and the first side surface 5s. In this example, the height of the upper surface 5u is the same as the height of the upper surfaces 1u of the first resin walls 341a and 341b. Also, the height of the upper end of the first side surface 5s is the same as the height of the upper ends of the first side surfaces 1s of the first resin walls 341a and 341b.

In this modified example, the first light emitting element 51 is arranged in a region defined by the four first resin walls 341a to 341d.

The first region 121 includes a first portion P1 including an element mounting region dr and a pair of side regions sr, and a pair of second portions P2 sandwiching the first portion P1 in the second direction D2. In the illustrated example, the side region sr is a region of the first portion P1 located outside the first resin walls 341c and 341d. A nozzle arrangement region 801 including the second portion P2 and the side region sr can be formed on the +y side and the −y side of the first light emitting element 51 .

As indicated by arrows 802 in FIG. 23, the first resin material 150a (FIG. 30C) ejected from the nozzles arranged in the nozzle arrangement region 801 spreads over the first resin walls 341c and 341d and the first resin walls 341a and 341b. , flows into the area defined by the first resin walls 341 a to 341 d through the gaps d 1 and d 2 , and wraps around the first light emitting element 51 . Therefore, the first reflective members 151 can be formed on each side surface of the first light emitting element 51 by curing the first resin material 150a arranged in this way.

This modification also provides the same effect as the light emitting device 2000 (FIGS. 14 to 15E). That is, the thickness of the first reflecting member 151 in the z-axis direction can be controlled by the height of the first side surfaces 1s and 5s. Also, the thickness of the precoat resin in the z-axis direction (height of the top surface of the precoat resin) can be controlled by the height of the upper surfaces 1u and 5u. Furthermore, the tapered surfaces 1 t and 5 t can prevent the light emitted from the first light emitting element 51 from being blocked by the upper surfaces 1 u and 5 u of the first resin wall 341 .

<Modification 9>
FIG. 24 is a schematic perspective view of the light emitting device 2005 of Modification 9 with the mold resin portion 60 and the reflective members 151 to 153 removed. 25 is an enlarged plan view showing the first region 121 in the resin package 100 of the light emitting device 2005. FIG.

The multiple resin walls 350 in this modified example include six first resin walls 351 , six second resin walls 352 and six third resin walls 353 .

An example of the structure of the first region 121 and the first resin wall 351 will be described with reference to FIG. 25 .

The six first resin walls 351 are the first resin walls 351a1 to 351a2 arranged on the +x side of the first light emitting element 51 with an interval d3 in the y-axis direction, and the first resin walls 351a1 to 351a2 on the -x side of the first light emitting element 51. , first resin walls 351b1 to 351b2 arranged with an interval d3 in the y-axis direction, and first resin walls 351c and 351d arranged on the -y side and the +y side of the first light emitting element 51, respectively.

The first resin walls 351a1 and 351a2 have a shape in which the first resin wall 341a (FIG. 23) in Modification 8 is divided into two with an interval in the center in the y-axis direction. Similarly, the first resin walls 351b1 and 351b2 have a shape in which the first resin wall 341b (FIG. 23) in Modification 8 is divided into two with an interval in the center in the y-axis direction.

This modification can obtain the same effects as the light emitting device 2004 of the eighth modification. Further, in this modification, a gap (interval d3) of the resin wall 340 is located between each light emitting element 50 and the connection area for wire bonding. For this reason, as in the fifth modification, by utilizing the distance d3 of the resin wall 340, wires for connecting the light emitting element 50 and any of the leads 11a to 13b can be easily and stably arranged.

<Modification 10>
FIG. 26 is a schematic perspective view of the light emitting device 2006 of Modification 10 from which the mold resin portion 60 and the reflective members 151 to 153 are removed. 27 is an enlarged plan view showing first region 121 in resin package 100 of light emitting device 2006. FIG.

The multiple resin walls 360 in this modified example include four first resin walls 361 , four second resin walls 362 and four third resin walls 363 . The first light emitting element 51 to the third light emitting element 53 each have a rectangular planar shape, and the four first resin walls 361 are located at the four corners of the rectangular shape of the first light emitting element 51 in plan view. facing each other. In this example, each first resin wall 361 has a side surface facing a part of each of two sides forming one corner of a quadrangle. Similarly, each of the second resin walls 362 and each of the third resin walls 363 is arranged to face the corner of the corresponding square of the light emitting element 50 in plan view.

An example of the structure of the first region 121 and the first resin wall 361 will be described with reference to FIG. 27 .

The four first resin walls 361 are the first resin walls 361a1 to 361a2 arranged on the +x side of the first light emitting element 51 with an interval d4 in the y-axis direction, and the first resin walls 361a1 to 361a2 on the -x side of the first light emitting element 51. , and first resin walls 361b1 to 361b2 arranged at intervals d4 in the y-axis direction.

The first resin walls 361a1 and 361a2 have a shape in which the first resin wall 301a (FIGS. 15D and 15E) of the light emitting device 2000 is divided into two at the center of the first wall portion 1a in the y-axis direction. have. Similarly, the first resin walls 361b1 and 361b2 are divided into two at the center of the first wall portion 1b in the y-axis direction in the first resin wall 301b (FIGS. 15D and 15E) of the light emitting device 2000. It has a separate shape.

This modified example can also provide the same effects as the light emitting device 2000 . Further, in this modification, a gap (interval d) of the resin wall 360 is located between each light emitting element 50 and the connection area for wire bonding. Therefore, as in the fifth modification, wires for connecting the light emitting element 50 and any of the leads 11a to 13b can be easily and stably arranged by using the distance d4.

<Modification 11>
FIG. 28 is a schematic perspective view of the light emitting device 2007 of Modification 11 from which the mold resin portion 60 and the reflective members 151 to 153 are removed. 29A is a schematic top perspective view of light emitting device 2007. FIG. 29B and 29C are schematic cross-sectional views taken along lines 29B-29B and 29C-29C, respectively, shown in FIG. 29A.

In the light emitting device 2007 of this modified example, a fourth resin wall (hereinafter referred to as " ) 501 and 502, which is different from the above-described light-emitting device.

The plurality of resin walls 370 in this modified example are a pair of first resin walls 371 arranged in the x-axis direction with the first light emitting element 51 interposed therebetween, and a pair of first resin walls 371 arranged in the x-axis direction with the third light emitting element 53 interposed therebetween. It includes a pair of second resin walls 372 and a pair of third resin walls 373 arranged in the x-axis direction with the third light emitting element 53 interposed therebetween. In this modification, the first direction D1 is the x-axis direction.

Resin blocks 501 and 502 are each located between two adjacent regions 120 and define part of the perimeter of the pre-coated resin such as colored resin members 161-163. That is, the resin blocks 501 and 502 can control the range to which the precoat resin is applied.

In the illustrated example, the resin blocks 501 and 502 have a rectangular planar shape. In plan view, the maximum width of the resin blocks 501 and 502 in the x-axis direction is smaller than the width of the inner upper surface of the recess 27, and is, for example, the same as the width of the adjacent second portion P2. Resin blocks 501 and 502 are spaced apart from the inner surface of recess 27 . Also, the resin blocks 501 and 502 are spaced apart from any of the resin walls 370 that define the peripheries of the reflective members 151-153.

Although the resin block 501 will be described below as an example, the resin block 502 may also have a similar structure.

FIG. 29D is a schematic perspective view showing the resin block 501 and the second resin walls 372a and 372b.

In this modification, the resin block 501 has an upper surface 501u, side surfaces 501s1 and 501s2 positioned on the +y side and the -y side, and side surfaces 501t1 and 501t2 positioned on the +x side and the -x side. The side surfaces 501t1 and 501t2 are tapered surfaces.

Side surfaces 501t1 and 501t2, which are both ends of the resin block 501 in the x-axis direction, are spaced apart from the second resin portion 42 (FIG. 29C), which is the inner surface of the recess 27. As shown in FIG. The side surfaces 501s1 and 501s2 of the resin block 501 are arranged with a distance f from the closest resin wall.

As shown in FIG. 29D, the upper surface 501u of the resin block 501 may be located above the upper surface of each resin wall 370, for example. As shown in FIG. 29C, the top surface of the resin block 501 may be at the same height as the top surface of the second resin portion 42 .

As shown in FIG. 29C, by providing resin blocks 501 and 502, the thickness and position of the colored resin members 161-163 can be controlled. In this modified example, the first colored resin member 161 is arranged on the first reflective member 151 and the first light emitting element 51 . A peripheral edge of the first colored resin member 161 is defined by the second resin portion 42 and the resin block 501 . A second colored resin member 162 is arranged on the second reflective member 152 and the second light emitting element 52 . A peripheral edge of the second colored resin member 162 is defined by the second resin portion 42 and the resin blocks 501 and 502 . A third colored resin member 163 is arranged on the third reflective member 153 and the third light emitting element 53 . A peripheral edge of the third colored resin member 163 is defined by the second resin portion 42 and the resin block 502 .

As shown in FIG. 29A, regions R1 and R2 where two colored resin members overlap with each other may be formed between the resin blocks 501 and 502 and the second resin portion 42 in plan view.

The structure of the pair of resin walls 370 in this modified example is not particularly limited, and any one of the structures described above can be applied.

Referring to FIG. 29D, the structure of the resin wall 370 in this modified example will be described using the second resin wall 372 as an example.

In the illustrated example, each of the second resin walls 372a and 372b has a rectangular planar shape. Each of the second resin walls 372a and 372b includes a first side surface 6s located on the side of the second light emitting element, a second side surface 6v located on the side opposite to the first side surface 6s, an upper surface 6u, and the upper surface 6u and the first side surface. 6s and tapered surface 6t. For example, the first side 6s may be perpendicular to the xy plane. The second side surface 6v may be a tapered surface. The upper surface 6u is located above the upper surface of the second light emitting element. It may be located below the upper surface 501u of the resin block 501, or may be at the same height.

As shown in FIG. 29A, also in this modification, a pair of resin grooves 46 may be formed on both sides of the second portion P2 of each region 120 in the first direction D1 in plan view. Thereby, the peripheral edge of each second portion P2 is defined by the resin wall 370, the resin blocks 501 and 502, the resin groove 46 and the second resin portion 42. As shown in FIG.

Also in this modification, a region 801 including the second portion P2 and the side region of the first portion P1 is a nozzle for applying the first resin material 150a (FIG. 30C) that becomes the reflective members 151 to 153. It can function as a placement area.

<Manufacturing Method of Light Emitting Device 2000>
An example of the method for manufacturing the light emitting device of this embodiment will be described below using the light emitting device 2000 as an example. The light emitting device 2000 can be manufactured in the same manner as the light emitting device 1000 described above. Differences from the manufacturing method of the light emitting device 1000 will be described below. The other light-emitting devices 2001 to 2008 of this embodiment can be manufactured by the same method as the light-emitting device 2000, although the numbers, positions and shapes of resin walls and resin grooves, presence or absence of resin blocks, etc. are different.

30A to 30E are process cross-sectional views for explaining the manufacturing method of the light emitting device 2000. FIG. 3A, 3B, 3D and 3E show the xy cross section, only FIG. 3C shows the yz cross section including the area where the nozzles are arranged.

First, as shown in FIG. 30A, a resin package 100 including a dark resin member 40 and a plurality of leads 10 is prepared by transfer molding, for example. The plurality of leads 10 includes a pair of leads 10a, 10b. Each resin wall 300 and resin groove 46 can be formed according to the shape of the mold used when forming the dark-colored resin member 40 . Here, a plurality of resin walls 300 made of a dark-colored resin member 40 are formed on the main surface 100a of the resin package. Incidentally, the resin blocks 501 and 502 (FIG. 29A) can be similarly formed by the shape of the mold.

Next, as shown in FIG. 30B, the light emitting element 50 is mounted on the main surface 100a of the resin package. In this embodiment, each light emitting element 50 is arranged inside a region defined by a plurality of resin walls 300 . In other words, in plan view, a plurality of resin walls 300 are arranged at intervals around each light emitting element 50 on the main surface 100a of the resin package.

Subsequently, as shown in FIG. 30C, by arranging nozzles in a nozzle arrangement region 801 (see FIG. 15D, etc.) on the main surface 100a of the resin package, the nozzles are arranged inside the region defined by the resin wall 300 (FIG. 30B). A first resin material 150a serving as a reflective member is applied around the arranged light emitting elements 50 . As described above, the nozzle is arranged outside the region defined by the plurality of resin walls 300 (FIG. 30B), and the first resin material 150a is passed through the gaps between the resin walls 300 to surround each light emitting element 50. may be placed. After that, the first resin material 150a is cured. Thereby, a reflective member 150 is formed as shown in FIG. 30D.

Subsequently, as shown in FIG. 30E , a colored resin material containing a coloring agent is applied onto the reflective member 150 and cured to form a colored resin member 160 . Thus, the structure 110 is obtained in which the light emitting element 50, the reflective member 150 and the colored resin member 160 are arranged on the main surface 100a of the resin package.

As shown in FIG. 15C, when forming colored resin members 161 to 163 that are colored in different colors, the colored resin members 161 to 163 can be formed by, for example, the following method. First, a first colored resin material and a third colored resin material containing different colorants are respectively applied to predetermined regions and cured to form the first colored resin member 161 and the third colored resin member 163. . Next, between the first colored resin member 161 and the third colored resin member 163, a second colored resin material containing a coloring agent different from the above is applied. At this time, the second colored resin material may be applied so as to partially overlap the first colored resin member 161 and the third colored resin member 163 . After that, the second colored resin member 162 is obtained by curing the second colored resin material.

Subsequently, a mold resin portion 60 for sealing the light emitting element 50 in the obtained structure 110 is formed. The mold resin portion 60 can be manufactured by a method similar to that of the light emitting device 1000, for example, using a transfer molding method. After that, the leads are cut from the lead frame and individualized, thereby manufacturing the light emitting device 2000 shown in FIG. 15C. Note that the mold resin portion may be formed using a casting molding method.

<Modification 12>
31A is a schematic top perspective view of a light emitting device 3000 of Modification 12, and FIG. 31B is a schematic cross-sectional view taken along line 31B-31B shown in FIG. 31A.

The light emitting device 3000 of Modified Example 12 is characterized in that at least one of the plurality of light emitting elements 50 is arranged non-parallel to the other light emitting elements in plan view, and at least one of the plurality of lens portions 70 It differs from the light emitting device 1000 shown in FIGS. 2A to 2E in that the height of the apex of one lens portion is made different from the height of the apex of the other lens portions.

In this modification, each of the first light emitting element 51, the second light emitting element 52, and the third light emitting element 53 has a rectangular planar shape. In a plan view, each side of the rectangle of at least one of the first light emitting element 51, the second light emitting element 52, and the third light emitting element 53 (here, the third light emitting element 53) is the other light emitting element. It is non-parallel to each side of the rectangle of (here, the first light emitting element 51 and the second light emitting element 52).

Thereby, as described in detail below, the light distribution controllability of the light emitting device 3000 can be improved, and a desired light distribution can be realized.

[Structure and Arrangement of Light Emitting Element]
Each of the first light emitting element 51 to the third light emitting element 53 has a first surface located on the side of the plurality of leads 11a to 13b, a second surface located on the side opposite to the first surface (that is, the lens portion side), and two electrodes located on the second surface. In each of the first to third light emitting elements 51 to 53, the positive and negative electrodes (positive electrode and negative electrode) are both positioned on the second surface. may be located in

In the example shown in FIG. 31A, two electrodes (positive and negative electrodes) e1 and e2 are positioned on the second surfaces of the first to third light emitting elements 51 to 53, respectively. Two electrodes e1 and e2 in each of the first light emitting element 51 and the second light emitting element 52 among the first light emitting element 51 to the third light emitting element 53 are arranged at two corners facing each other on the rectangular second surface. (ie, at diagonal corners). On the other hand, the two electrodes e1 and e2 of the third light emitting element 53 are arranged near the center of two sides facing each other on the rectangular second surface. Although the emission colors of the first light emitting element 51 to the third light emitting element 53 are not particularly limited, in this modification, the first light emitting element 51 is a red light emitting element that emits red, and the second light emitting element 52 emits blue. The third light emitting element 53 may be a green light emitting element that emits green light.

In the example shown in FIG. 31A, the first to third light emitting elements 51 to 53 are arranged in a row on the virtual line m0. Here, the line m0 is a line connecting the center points C1 to C3 of the first lens portion 71 to the third lens portion 73 in plan view. All of the four sides forming the rectangular planar shape of the first light emitting element 51 and the second light emitting element 52 (here, the four sides forming the outer edge of the rectangular shape of the second surface) are non-parallel to the line m0. . In plan view, each of the first light emitting element 51 and the second light emitting element 52 may be arranged such that a pair of opposite sides of the rectangular outer edge of the second surface form an angle of 45° with the line m0. . On the other hand, a pair of opposite sides of the rectangular planar shape of the third light emitting element 53 (here, a pair of opposite sides of the rectangular outer edge of the second surface) are parallel to the line m0.

In this specification, the smallest angle α among the angles formed between each side of the rectangular outer edge of the light emitting element and the line m0 in plan view is referred to as the “tilt angle with respect to the line m0”. In the illustrated example, the inclination angle α of the first light emitting element 51 and the second light emitting element 52 with respect to the line m0 is 45°.

In a light-emitting device having a light-emitting element and a lens positioned above the light-emitting element and covering the light-emitting element, when the size of the lens is reduced, the light distribution of the light-emitting device is influenced by the near-field light distribution characteristics of the light-emitting element. easier to receive. Therefore, it may be difficult to control the light distribution of the light emitting device by adjusting the curvature of the lens. The near-field light distribution characteristics of a light-emitting element can vary depending on the structure of the light-emitting element, such as the position and size of electrodes in the light-emitting element.

On the other hand, in this modified example, considering the positions of the electrodes of the first to third light emitting elements 51 to 53, more specifically, the positions of the electrodes on the second surface of these light emitting elements are reflected. By arranging each of the first to third light emitting elements 51 to 53 in the resin package 100 in consideration of the light emission luminance distribution, the light emitting device 3000 having desired light distribution (directivity) can be realized.

The relationship between the light emission luminance distribution of the light emitting elements and the arrangement of the light emitting elements in plan view will be specifically described below.

32A and 32B are schematic plan views illustrating emission luminance distributions of the second surfaces 51a and 53a of the first light emitting element 51 and the third light emitting element 53, respectively. In FIGS. 32A and 32B, regions with high emission luminance are shown in white, and regions with lower emission luminance than the regions shown in white are shown in black. In the following description, regions of the second surfaces 51a and 53a with high emission luminance shown in white are called "light-emitting portions", and regions with low emission luminance shown in black are called "non-light-emitting portions". Each electrode of the first light emitting element 51 and the third light emitting element 53 is connected to a lead by a wire.

As shown in FIG. 32A , the light emission luminance distribution of the second surface 51 a of the first light emitting element 51 includes a light emitting portion 611 and a non-light emitting portion 612 whose luminance is lower than that of the light emitting portion 611 . The non-light-emitting portions 612 are located at two corners facing each other. The position of the non-light-emitting portion 612 corresponds to the positions of the electrodes e1 and e2 (FIG. 31A). In this specification, the “non-light-emitting portion” includes not only a non-light-emitting region of the second surface, but also a region where electrodes are formed so that light is not emitted, and a region that looks dark due to shadows of wires. Also includes Assuming that the maximum luminance of the second surface 51a is 100%, the luminance of the light-emitting portion 611 is 40% or more and 100% or less, and the luminance of the non-light-emitting portion 612 is 0% or more and less than 40%. In this example, the width 611a of the light-emitting portion 611 in the diagonal line connecting the two corners where the electrode is not formed on the second surface 51a is larger than the width 611b in the diagonal line connecting the two corners where the electrode is formed. . The “width of the light emitting portion along the diagonal line” refers to the length of the light emitting portion cut off by the diagonal line, that is, the length of the portion of the light emitting portion that overlaps the diagonal line in a plan view.

The second light emitting element 52 has electrodes at the same positions as the first light emitting element 51 . Therefore, in the light emission luminance distribution of the second light emitting element 52, similarly to the first light emitting element 51, the width of the light emitting portion on the diagonal connecting two corners on the second surface where the electrodes are not formed is can be greater than the width of the light-emitting portion at the diagonal connecting the two corners where the light-emitting portion is located.

As shown in FIG. 32B, the light emission luminance distribution of the second surface 53a of the third light emitting element 53 is such that the light emitting portion 611 and the non-light emitting portion located near the center of two sides facing each other and having lower luminance than the light emitting portion 611. 612. The position of the non-light emitting portion 612 of the third light emitting element 53 in FIG. 32B corresponds to the positions of the electrodes e1 and e2 in FIG. 31A. The width 611c of the light-emitting portion 611 along the line connecting the center portions of the two sides on which the electrodes are not formed on the second surface 53a is greater than the width 611d of the light-emitting portion 611 along the line connecting the center portions of the two sides where the electrodes are formed. is also big. In addition, "the width of the light emitting part in the line connecting the central part" is the length of the light emitting part cut by the line connecting the central parts of the two sides, that is, in the plan view, the central part of the two sides of the light emitting part refers to the length of the part that overlaps the line connecting

In this modification, the first light emitting element 51 to the third light emitting element 53 are preferably arranged on a line m0 connecting the center points C1 to C3 of the first lens portion 71 to the third lens portion 73 in plan view. . In plan view, the centers of the second surfaces of the first to third light emitting elements 51 to 53 may be arranged on the line m0.

FIG. 33 is a plan view showing a reference example arrangement of the first to third light emitting elements 51 to 53 having the light emission luminance distribution described with reference to FIGS. 32A and 32B. FIG. 34 is a plan view showing the arrangement of the first to third light emitting elements 51 to 53 in the light emitting device 3000 of this modification shown in FIGS. 31A and 31B. 33 and 34 show only the second surfaces 51a to 53a of the first light emitting element 51 to the third light emitting element 53 and the light emission luminance distribution of the first light emitting element 51 to the third light emitting element 53. components are omitted. In addition, in these figures, in each of the first light emitting element 51 to the third light emitting element 53, an imaginary line m1 passing through the center of the second surface and forming an angle of 45° clockwise from the line m0. and an imaginary line m2 passing through the center of the second surface and forming an angle of 135° clockwise from the line m0. In FIG. 34, in each of the first to third light emitting elements 51 to 53, a virtual line m3 passing through the center of the second surface and perpendicular to the line m0 is indicated by a dashed line. In the examples shown in FIGS. 33 and 34, the centers of the second surfaces of the first to third light emitting elements 51 to 53 coincide with the center points C1 to C3 of the first to third lens portions.

In the reference example shown in FIG. 33, two sides (one pair of opposite sides) of the rectangular second surface of each of the first to third light emitting elements 51 to 53 are parallel to the line m0 in plan view. In the reference example shown in FIG. 33, in the first light emitting element 51 and the second light emitting element 52, the width of the light emitting portion 611 along the line m1 is smaller than the width of the light emitting portion 611 along the line m2. In this specification, the “width of the light-emitting portion along line m1 (or line m2)” is the length of the light-emitting portion cut off by line m1 (or line m2) in plan view, that is, the width of the light-emitting portion in plan view. Among them, the length of the portion overlapping the line m1 (or the line m2) is indicated. For example, in the first light emitting element 51 shown in FIG. 33, the width of the light emitting portion 611 on the line m1 is the length 611e of the light emitting portion 611 cut by the line m1, and the width of the light emitting portion 611 on the line m2 is the line m2 is the length 611f of the light-emitting portion 611 cut by . Therefore, in the first light emitting element 51 and the second light emitting element 52, the light emission distribution on the line m1 (the light emission distribution of the cross section including the line m1 and perpendicular to the second surface) and the light emission distribution on the line m2 ( luminescence distribution of a cross section that includes the line m2 and is perpendicular to the second surface). The half-value angle (orientation angle) of the first light emitting element 51 on the line m1 can be, for example, about 6.6° smaller than the half-value angle on the line m2 (for example, the half-value angle on the line m1 of the third light emitting element 53 (directivity angle) and the half-value angle (directivity angle) on line m2 is, for example, about 1.6°). In this specification, the difference in light distribution indicated by the half-value angle (orientation angle) between the line m1 and the line m2 may be abbreviated as "light distribution difference". In the third light emitting element 53, the width of the light emitting portion 611 along the line m1 is substantially the same as the width of the light emitting portion 611 along the line m2. Therefore, the light distribution difference of the third light emitting element 53 is suppressed to be smaller than that of the first light emitting element 51 and the second light emitting element 52 .

When the light-emitting device arranged as in this reference example is applied to a display device, display characteristics such as image color and video may be affected by the light distribution difference between the first and second light-emitting elements 51 and 52. . For example, since the light distribution on the line m1 in the first light emitting element 51 (for example, the red light emitting element) is narrow (the half-value angle is small), when the display device using the light emitting device is viewed from the direction of the line m1, the red color becomes weak. image distortion such as

On the other hand, in the light-emitting device 3000 of the present modified example, as shown in FIG. 34, in plan view, each of the first light-emitting element 51 and the second light-emitting element 52 has two rectangular second surfaces 51a and 52a. Each side (a pair of opposite sides) is arranged to form an angle of 45° with respect to the line m0. That is, the inclination angle α of the first light emitting element 51 and the second light emitting element 52 with respect to the line m0 is 45°. Accordingly, in each of the first light emitting element 51 and the second light emitting element 52, the difference between the width of the light emitting portion 611 on the line m1 and the width of the light emitting portion 611 on the line m2 can be made smaller than in the reference example. In this example, the width of the light emitting portion 611 on the line m1 can be substantially the same as the width of the light emitting portion 611 on the line m2. As a result, the difference between the light distribution on the line m1 and the light distribution on the line m2 can be reduced. As a result, the influence of the near-field light distribution characteristics of the first light emitting element 51 and the second light emitting element 52 on the light distribution of the light emitting device 3000 can be suppressed to a smaller extent, so that the light distribution controllability can be further improved. can.

In this modification, each of the first light emitting element 51 to the third light emitting element 53 is arranged so as to reduce the difference between the width of the light emitting portion 611 on the line m1 and the width of the light emitting portion 611 on the line m2. Just do it. For example, each of the first light emitting element 51 to the third light emitting element 53 is arranged so that its electrodes do not overlap the lines m1 and m2 in plan view (that is, the electrodes are displaced from the lines m1 and m2). may be Alternatively, each of the first light-emitting element 51 to the third light-emitting element 53 is arranged such that the shape of the light-emitting portion 611 in plan view is substantially symmetrical (line-symmetrical) with respect to the line m0 and/or the line m3. good too.

By using the light-emitting device 3000 of this modified example, a display device in which the disturbance of image color and video caused by the difference in light distribution is further reduced is realized.

As shown in FIGS. 31A and 34, the electrodes e1 and e2 of the first to third light emitting elements 51 to 53 are preferably arranged on the line m0 in plan view. As a result, in plan view, in the direction connecting the electrodes e1 and e2 in each of the first to third light emitting elements 51 to 53, that is, in the light emission luminance distribution of the first to third light emitting elements 51 to 53, the light emitting portion The direction in which the width of is relatively small is aligned with the minor axis of the corresponding lens portion, and the width of the light emitting portion of the light emission luminance distribution of the first light emitting element 51 to the third light emitting element 53 is relatively large. The direction can be aligned with the long axis of the corresponding lens portion. Therefore, it is possible to improve the efficiency of light extraction from each light emitting element to the corresponding lens, thereby improving the light extraction efficiency.

FIG. 35 is a plan view showing another example of arrangement of the first to third light emitting elements 51 to 53. FIG. The example shown in FIG. 35 differs from the example shown in FIG. 34 in the positions of the electrodes of the first light emitting element 51 and the second light emitting element 52 . In the example shown in FIG. 35, in plan view, each electrode of the first light emitting element 51 to the third light emitting element 53 passes through the center of the rectangular second surface of each light emitting element and rotates clockwise from the line m0. is positioned on a line m3 forming an angle of 90° to . In plan view, the direction connecting the electrodes in each of the first to third light emitting elements 51 to 53 may coincide with the long axis of the corresponding lens portion. Even in this case, it is possible to reduce the difference in light distribution between the lines m1 and m2 of the first to third light emitting elements 51 to 53, respectively.

Each of the first to third light emitting elements 51 to 53 may have a square shape in plan view. In this case, by arranging the first to third light emitting elements 51 to 53 as illustrated in FIG. 34 or 35, the light distribution difference on the lines m1 and m2 in each light emitting element can be further reduced.

Note that the inclination angle α of each of the first to third light emitting elements 51 to 53 in a plan view with respect to the line m0 depends on the position of the electrode in the light emitting element, regardless of the wavelength of the light emitted by the light emitting element. can be set. Further, the inclination angle α of each of the first to third light emitting elements 51 to 53 with respect to the line m0 is selected from 0° to 45° depending on the planar shape of the light emitting element, the position of the electrode, the shape of the electrode, and the like. obtain. When the planar shape of the light emitting element is a rectangle and electrodes are provided at two corners facing each other, the inclination angle α of the light emitting element with respect to the line m0 may be greater than 0° and less than 45°.

[Lens size and shape]
In this modified example, the height of the vertex of at least one of the first lens portion 71, the second lens portion 72, and the third lens portion 73 is different from the height of the vertex of the other lens portions.

In the example shown in FIG. 31B , the height HL3 of the vertex T3 of the third lens portion 73 is greater than the height HL1 of the vertex T1 of the first lens portion 71 and the height HL2 of the vertex T2 of the second lens portion 72 . The height HL1 of the vertex T1 of the first lens portion 71 and the height HL2 of the vertex T2 of the second lens portion 72 may be the same or different. The heights HL1 to HL3 of the vertices T1 to T3 in the first lens portion 71 to the third lens portion 73 are the heights of the vertices T1 to T3 from the upper surface 61a of the base portion 61, that is, the heights of the vertices T1 to T3. It refers to the shortest distance to the upper surface 61 a of the base portion 61 . In the illustrated example, the heights HL1 to HL3 of the vertices T1 to T3 are the shortest distances between the convex vertices and bottom surfaces of the lens portions 71 to 73, respectively.

Further, the sizes of the first lens portion 71 to the third lens portion 73 (widths WS1 to WS3 in the short axis direction and widths WL1 to WL3 in the long axis direction) in plan view may be different from each other. Here, the width WS3 of the third lens portion 73 in the short axis direction is larger than the widths WS1 and WS2 of the first lens portion 71 and the second lens portion 72 in the short axis direction, and is greater than the widths WL1 and WL2 of the first lens portion 71 and the second lens portion 72 in the longitudinal direction. The sizes of the first lens portion 71 and the second lens portion 72 in plan view may be the same, or may be different from each other.

In the example shown in FIG. 31B, the size of each lens portion 71-73 may be adjusted so that the light emitted from that lens portion has a desired light distribution. For example, the half-value angle on the long axis of the lens portion may be 100° or more and 120° or less, and the half-value angle on the short axis may be 50° or more and 70° or less. The heights HL1 and HL2 of the vertices T1 and T2 of the first and second lens portions 71 and 72 are 0.3 mm to 0.5 mm, for example 0.40 mm, and the height HL3 of the apex T3 of the third lens portion 73 is 0.40 mm. is between 0.4 mm and 0.6 mm, for example 0.50 mm. The width WS1 of the first lens portion 71 in the minor axis direction is 0.6 mm to 1.0 mm, for example, 0.8 mm, and the width WL1 of the first lens portion 71 in the major axis direction is 1.0 mm to 1.0 mm. .4 mm, for example 1.2 mm. The width WS2 of the second lens portion 72 in the minor axis direction is 0.6 mm to 1.0 mm, for example, 0.8 mm, and the width WL2 of the second lens portion 72 in the major axis direction is 1.0 mm to 1.4 mm. , for example 1.2 mm. The width WS3 of the third lens portion 73 in the short axis direction is 0.8 mm to 1.2 mm, for example 1.0 mm, and the width WL3 in the long axis direction of the third lens portion 73 is 1.4 mm to 1.8 mm. , for example 1.6 mm.

As described above, in side views viewed from the x-axis direction and/or the y-axis direction, the outer edges of the first lens portion 71 to the third lens portion 73 may include straight portions in addition to curved portions. As an example, the lens portions 71 to 73 may include straight portions in the side view viewed from the y-axis direction, and the lens portions 71 to 73 may not include the straight portion in the side view viewed from the x-axis direction. . In addition, the shapes of the outer edges of the first lens portion 71 to the third lens portion 73 in side views may be different from each other. For example, in a side view viewed from the y-axis direction, the outer edge of at least one of the first lens portion 71 to the third lens portion 73 includes a straight portion, and the outer edges of the other lens portions include straight portions. It doesn't have to be.

The curvature of at least one lens portion among the first lens portion 71 to the third lens portion 73 may be different from the curvature of the other lens portions. The curvatures of the first lens portion 71 to the third lens portion 73 may be different from each other. Alternatively, the first lens portion 71 to the third lens portion 73 may have the same curvature. In this specification, the “curvature of the lens portion” refers to the curved portion of the outer edge of the lens portion that includes the apex of the lens portion and includes the apex of the lens portion in a cross section along the major axis direction or the minor axis direction. Curvature.

According to this modification, the size of the corresponding lens portion 70 (for example, the heights HL1 to HL3 of the apexes T1 to T3, the short axis By adjusting the widths WS1 to WS3 in the direction, the widths WL1 to WL3 in the major axis direction, the curvature, etc., light from the first to third light emitting elements 51 to 53 passes through the corresponding lens portions 71 to 73. Light distribution controllability of emitted light can be enhanced. In addition, the direction in which the width of the light emitting portion is relatively small in the light emission luminance distribution of the first light emitting element 51 to the third light emitting element 53 described above is aligned with the short axis of the corresponding lens portion, and the first light emitting element A configuration in which the direction in which the width of the light emitting portion of the light emission luminance distribution of 51 to the third light emitting element 53 is relatively large coincides with the long axis of the corresponding lens portion, and each of the first light emitting element 51 to the third light emitting element 53 By combining a configuration in which the size of the corresponding lens portion 70 is increased in accordance with the light emission luminance distribution, the light distribution controllability of the light emitting device 3000 can be enhanced, and the light extraction efficiency can be improved.

For example, when narrowing the light distribution of light emitted from a certain light emitting element through a lens portion, first, the curvature of the lens portion is adjusted. If the light distribution cannot be sufficiently narrowed down only by adjusting the curvature, the size of the lens portion may be made larger than the other lens portions. Alternatively, the size of the lens portion may be increased without changing the curvature of the lens portion.

When the light distribution of a certain light emitting element (here, the third light emitting element 53) is wider than the light distribution of other light emitting elements, the size of the third lens portion 73 corresponding to the third light emitting element 53 (for example, the lens portion By making the height HL3 of the vertex of 73 larger than the other lens portions 71 and 72, the light distribution of the light (here, green light) emitted through the third lens portion 73 can be narrowed. For example, as shown in FIG. 34, when the light distribution on the line m0 of the third light emitting element 53 is wider than the light distribution on the line m0 of the first and second light emitting elements 51 and 52, the third light emitting element 53 , the height HL3 of the vertex of the third lens portion 73 corresponding to .

In this modified example, the size of the third lens portion 73 is larger than that of the first lens portion 71 and the second lens portion 72, but the size relationship between the first lens portion 71 to the third lens portion 73 is Not limited. The sizes of these lens portions 71 to 73 can be set according to the light emission luminance distribution depending on the electrode position of each light emitting element.

Among the first lens portion 71 to the third lens portion 73, the lens portion having the highest apex height (hereinafter referred to as the “maximum lens portion”) is the first lens portion 71 to the third lens portion in plan view. It is preferably arranged at one end of a row (hereinafter referred to as "lens row") in which the lenses 73 are arranged in one direction. In the example shown in FIG. 31A, the third lens portion 73, which is the largest lens portion, is arranged at one end of the lens row (the end on the +y side here) consisting of the first lens portion 71 to the third lens portion 73. . This reduces the ratio of light that is blocked by the largest lens (light from other lenses enters the largest lens and changes its emission direction) to the light emitted from the other lenses. can. When the apex heights of the first lens portion 71 to the third lens portion 73 are different from each other, the largest lens portion is arranged at one end of the lens row, and the lens portion with the smallest apex height (hereinafter referred to as " ) may be arranged at the other end of the lens array.

When the light-emitting device of this modified example is used in a display device such as an outdoor display, the three lens portions 70a to 70c of the light-emitting device are arranged along the vertical direction of the display surface (surface from which light is emitted) of the display device. You may When looking up at such a display surface from below, if the largest lens portion 70a is positioned at the center of the lens row as shown in FIG. Part of the light directed toward the observer enters the maximum lens portion 70a and is difficult to exit toward the observer. On the other hand, as shown in FIG. 36B, when the largest lens portion 70a is arranged at the upper end of the lens row, the lens is directed downward from the lens portion (largest lens portion) 70a at the upper end of the lens row compared to the example shown in FIG. 36A. It is possible to reduce the proportion of light incident on the other lens portions 70b and 70c in the light. Therefore, it is possible to more efficiently emit downward light from each of the three lens portions 70a to 70c to the viewer side.

When the heights of the apexes of the three lens portions 70a to 70c are different from each other, as shown in FIG. 36C, it is possible to arrange the largest lens portion 70a at the upper end of the lens row and the smallest lens portion 70c at the lower end of the lens row. preferable. As a result, the proportion of light that is blocked by other lens portions in the light directed downward from the lens portion (maximum lens portion) 70a at the upper end of the lens row and the lens portion 70b located in the center can be reduced.

FIG. 37 is a schematic cross-sectional view of another light emitting device 3001 of this modified example, showing a cross section including line m0 and parallel to the yz plane.

Light emitting device 3001 differs from light emitting device 3000 shown in FIGS. 31A and 31B in the shape and size of first lens portion 71 to third lens portion 73 . The shape, size, etc. of the first to third lens portions 71 to 73 are adjusted so that the light emitting device 3001 has a narrower light distribution (that is, higher directivity) than the light emitting device 3000 . In this example, the sizes of the first lens portion 71 to the third lens portion 73 of the light emitting device 3001 (vertex height HL1 to HL3, widths WS1 to WS3 in the minor axis direction, and widths WL1 to WL3 in the major axis direction) is larger than that of the light emitting device 3000 . Also, the curvature of the first lens portion 71 to the third lens portion 73 of the light emitting device 30001 is smaller than the curvature of the first lens portion 71 to the third lens portion 73 of the light emitting device 3000 .

In the example shown in FIG. 37, the size of each lens portion 71 to 73 may be adjusted so that the light emitted from that lens portion has a desired light distribution. For example, the half-value angle on the long axis of the lens portion may be 80° or more and less than 100°, and the half-value angle on the short axis may be 35° or more and less than 50°. The heights HL1 and HL2 of the apexes T1 and T2 of the first and second lens portions 71 and 72 are 0.6 mm to 0.8 mm, for example 0.7 mm, and the height HL3 of the apex T3 of the third lens portion 73 is is between 0.8 mm and 1.0 mm, for example 0.9 mm. The width WS1 of the first lens portion 71 in the minor axis direction is 0.8 mm to 1.2 mm, for example, 1.0 mm, and the width WL1 of the first lens portion 71 in the major axis direction is 1.2 mm to 1.2 mm. .6 mm, for example 1.4 mm. The width WS2 of the second lens portion 72 in the minor axis direction is 0.8 mm to 1.2 mm, for example 1.0 mm, and the width WL2 of the second lens portion 72 in the major axis direction is 1.3 mm to 1.7 mm. , for example 1.5 mm. The width WS3 of the third lens portion 73 in the short axis direction is 1.0 mm to 1.4 mm, for example 1.2 mm, and the width WL3 in the long axis direction of the third lens portion 73 is 1.6 mm to 2.0 mm. , for example 1.8 mm.

In this modified example, at least one of the first to third light emitting elements 51 to 53 is arranged (line m0 is different from that of the other light emitting elements, and the sizes of the first lens portion 71 to the third lens portion 73 may be the same. Alternatively, the size of at least one lens portion among the first lens portion 71 to the third lens portion 73 can be made different from the other lens portions according to the light emission luminance distribution of the first light emitting element 51 to the third light emitting element 53. However, the inclination angles α of the first to third light emitting elements 51 to 53 with respect to the line m0 may be the same.

FIG. 38 is a schematic perspective view of a light emitting device 4000 of Modification 13 from which the mold resin portion is removed. 39A is a schematic top view of the light emitting device shown in FIG. 38. FIG. 39B is a schematic cross-sectional view taken along line 39B-39B shown in FIG. 39A. Figure 39C is a schematic cross-sectional view taken along line 39C-39C shown in Figure 39A.

Light emitting device 4000 differs from light emitting devices 2000 to 2008 described above in that first resin portion 41 located on inner upper surface 27a of recess 27 on main surface 100a of resin package 100 includes at least one protrusion 49. . For example, in plan view, the convex portion 49 is arranged apart from the inner side surface 27c of the concave portion 27 .

In the example shown in FIG. 39C , the first resin portion 41 includes a plurality of (here, two) protrusions 49 arranged apart from each other in the recess 27 . Some or all of the plurality of protrusions 49 may be located between two adjacent light emitting elements among the plurality of light emitting elements 50 . The upper surface 46u of each projection 49 is located above the exposed region 30 of the lead. A portion of the first resin portion 41 other than the convex portion 49 may be substantially flush with the exposed region 30 of the lead, for example. The term “substantially flush” includes tolerances for errors due to dimensional tolerances, manufacturing tolerances, and member tolerances. At least part of the side surface of each projection 49 may be in contact with the reflective member 150 . A side surface of the protrusion 49 may be exposed from the reflective member 150 .

In the example shown in FIG. 38 , the height of the upper surface 49 u of the projection 49 is the same as the height of the upper surface of the second resin portion 42 surrounding the inner upper surface 27 a of the recess 27 . Since the upper surface 49u of the convex portion 49 is positioned above the upper surface of the light emitting element 50 (here, it is at the same height as the upper surface of the second resin portion 42), the reflective member 150 is arranged in the concave portion 27. It is easy to control the area where the The “height of the upper surface 49u of the convex portion 49” and the “height of the upper surface of the second resin portion 42” can be defined, for example, by the distance from the rear surface 100b of the resin package 100 to the upper surface in the z-axis direction. It is sufficient that the upper surface 49u of at least one convex portion 49 is positioned above the upper surface of the light emitting element 50 .

In the example shown in FIG. 39A , a plurality of (here, two) protrusions 49 are arranged in the recess 27 . The two protrusions 49 are, in plan view, a protrusion 491 positioned between the first region 121 and the second region 122 and a protrusion 492 positioned between the second region 122 and the third region 123. ,including. Each of the protrusions 491 and 492 is spaced apart from the second resin portion 42 that is the side wall of the recess 27 .

A reflective member 150 is arranged in each of the first to third regions 121 to 123 . The reflective members 150 arranged in each of the first to third regions 121 to 123 may be separated from each other by the protrusions 49 . For example, the reflective member 150 does not have to be arranged between the inner side surface 27 c of the concave portion 27 in the y-axis direction and the side surface of the convex portion 49 in the y-axis direction. Note that the reflective members 150 may be arranged continuously in the recess 27 .

According to this modified example, in plan view, the reflective member 150 is arranged in a region of the inner upper surface 27a of the concave portion 27 excluding the region where the convex portion 49 is arranged. Thereby, the volume of the reflective member 150 can be reduced. Therefore, the stress on the light emitting element 50 generated during the manufacturing process can be reduced, and the floating of the light emitting element 50 from the lead 11 can be reduced. In addition, since the first resin portion 41 has the convex portion 49 on the inner upper surface 27 a of the concave portion 27 , the reflective member 150 has a hole or a groove corresponding to the convex portion 49 , or has the convex portion 49 therebetween. It becomes possible to arrange them in two or more regions separated from each other. Therefore, problems caused by stress generated between the reflective member 150 and the light emitting element 50 can be reduced when the light emitting device 4000 is manufactured or mounted.

In the example shown in FIG. 38 , at least the upper surface 49 u of the convex portion 49 is exposed from the reflective member 150 . As a result, in plan view, the area of the reflective member 150 occupying the inner upper surface 27a of the recess 27 can be reduced, so that the display contrast can be further improved. When the translucent resin member 180 is arranged on the reflective member 150 in the recess 27 , at least part of the upper surface of the protruding portion 49 may be exposed from the translucent resin member 180 . The exposed portion of the convex portion 49 may be in contact with the mold resin portion.

In a plan view of the main surface 100a of the resin package 100, each protrusion 49 has a portion positioned between two adjacent leads among the plurality of leads and a portion overlapping each of the two adjacent leads. may contain. In the example shown in FIG. 39A, the convex portion 491 includes, in plan view, portions overlapping the leads 11a, 11b, 12a, and 12b and portions positioned between these leads. In addition, the convex portion 492 includes, in plan view, portions overlapping with the leads 12a, 12b, 13a, and 13b and portions positioned between these leads. As a result, when the resin package 100 is manufactured, the protrusions 491 and 492 can reduce the floating of the lead frame from the dark-colored resin member 40 .

The planar shape of the projection 49 will be described below with reference to FIG. 39A. The convex portion 49 includes a first width portion, a second width portion, and a third width portion having different widths in the y-axis direction. The first width portion faces the light emitting element 50 . The second width portions are located on the +x side and the −x side of the light emitting element 50 and are arranged so as to sandwich the light emitting element 50 in plan view. The third width portion is positioned at the extreme end in the x-axis direction in plan view. The first width portion has a smaller width in the y-axis direction than the second width portion. The second width portion has a larger width in the y-axis direction than the third width portion. The first width portion is wider in the y-axis direction than the third width portion. As a result, the first width portion and the light emitting element 50 can be arranged close to each other in plan view, and the volume of the reflective member 150 arranged between the first width portion and the light emitting element 50 can be reduced. can. Therefore, the stress to the light-emitting element 50 generated during the manufacturing process can be reduced, and the light-emitting element 50 is less likely to float from the lead 11 . Moreover, in plan view, the distance in the y-axis direction from the third width portion to the second resin portion 42 can be increased. This makes it possible to increase the area of the connection area wr. Therefore, it is possible to facilitate bonding between the connection region and the wire. The first width portion and the third width portion may have the same width in the y-axis direction. Further, on the side surface of each convex portion 49, the first resin portion 41 may have a stepped surface 49st facing in the same direction as the main surface 100a. In a cross-sectional view, each convex portion 49 has a stepped side surface, and the step surface 49st is an upward surface corresponding to the tread surface of the stairs. The upper surface of the light emitting element 50 may be located above the step surface 49st. By providing the step surface 49st that is lower than the upper surface of the light emitting element 50, it is possible to prevent the reflective member 150 from creeping up on the upper surface of the light emitting element 50. FIG. As an example, the distance k2 in the z-axis direction between the upper surface 49u of the projection 49 and the exposed region 30 is 0.2 mm, and the distance k3 in the z-axis direction between the step surface 49st of the projection 49 and the exposed region 30 is 0.2 mm. 1 mm. For example, the step surface 49st is arranged so as to surround the upper surface 49u of the projection 49 in plan view. For example, in plan view, the shape of the outer edge of the stepped surface 49st of the convex portion 49 is similar to the shape of the outer edge of the upper surface 49u of the convex portion 49 .

The second resin portion 42 may have a stepped surface 42st facing in the same direction as the main surface 100a between the second resin portion 42 and the inner upper surface 27a in plan view. The height of the stepped surface 42st may be the same as the height of the stepped surface 49st of the convex portion 49 .

In the example shown in FIG. 39A , the first region 121 is defined by the side surface of the second resin portion 42 (the side surface in the x-axis direction) and the side surface of the projection 491 , and the second region 122 is defined by the projections 491 and 492 . The third region 213 is defined by the side surface (the side surface in the x-axis direction) and the side surface of the second resin portion 42 (the side surface in the x-axis direction) and the side surface of the protrusion 492 . In plan view, each of the first region 121 to the third region 123 includes a portion Pd where the corresponding light emitting element 50 is located and two constricted portions Pn located on the +x side and the −x side of the portion Pd. It's okay. The width of each constricted portion Pn in the y-axis direction is smaller than the width of the portion Pd in the y-axis direction. This makes it easy to arrange the first resin material to be the reflective member 150 in a region close to each light emitting element 50 via the constricted portion Pn using capillary action. A planar shape of the second resin portion 42 will be described. The second resin portion 42 extending in the x-axis direction includes a narrow portion facing the light emitting element 50 and a wide portion wider in the y-axis direction than the narrow portion. Here, an example including a portion extending in the +y direction is shown as the wide portion of the second resin portion 42 . However, the wide portion of the second resin portion 42 may include a portion extending in the -y direction. The wide portion of the second resin portion 42 is arranged to face the second width portion of the convex portion 49 . This defines the constricted portion Pn and the portion Pd. For example, the wide parts of the two second resin parts 42 are arranged so as to sandwich the light emitting element 51 .

An example of a method of arranging the reflective member 150 will be described below using the second region 122 as an example with reference to FIG. 39D. In the light-emitting device 4000, for example, the regions located on the +x side and the −x side of the second region 122 (regions serving as connection regions wr) are nozzle arrangement regions where nozzles for applying the first resin material are arranged. 700 can be used. The first resin material is a resin material that becomes the reflective member 150 when cured. When the nozzles are arranged in the nozzle arrangement region 700 and the first resin material is discharged, the first resin material passes through the constricted portion Pn and into the portion Pd of the second region 122 by capillary action, as indicated by an arrow 701. flow into The first resin material that has flowed from the constricted portion Pn wraps around between the side surface of the second light emitting element 52 and the side surfaces of the protrusions 491 and 492 . In this manner, the reflective member 150 can be arranged between the side surfaces of the second light emitting element 52 and the side surfaces of the protrusions 491 and 492 .

The mold resin portion may have a portion located at each constricted portion Pn. Since the surface area of the second resin portion 42 is increased by the presence of the constricted portion Pn, the contact area with the mold resin portion can be increased. The presence of the constricted portion Pn can increase the adhesive force between the mold resin portion and the resin package 100, so that the mold resin portion can be fixed to the resin package 100 more stably.

In the example shown in FIG. 38 , in the concave portion 27 , the second dark resin is applied to the area defined by the side surface of the second resin portion 42 and the portion extending in the y-axis direction of the side surface of each convex portion 49 . A member 190 is arranged. The second dark-colored resin member 190 can cover the leads 11a to 13b. Therefore, the contrast of the light emitting device 4003 can be improved. In the convex portion 49, the difference in width between the second width portion and the third width portion in the y-axis direction reduces the overlap of the second dark-colored resin member 190 with the upper surface of the light emitting element 50. be able to. Note that the second dark-colored resin member 190 may not be arranged.

FIG. 40 is a schematic perspective view of another light emitting device 4001 of Modified Example 13 from which the mold resin portion is removed. Light emitting device 4001 differs from light emitting device 4000 shown in FIG. 38 in that, on main surface 100a of resin package 100, upper surface 49u of at least one projection 49 has depression 49h.

For example, the mold resin portion 60 includes a portion located inside the recess 49h of each convex portion 49 . At this time, the inner surface of the recess 49h is in contact with the mold resin portion. For example, when forming the mold resin portion, a resin material to be the mold resin portion is applied so as to fill the depressions 49h of the convex portions 49, and is cured. Thereby, the adhesive force between the mold resin portion and the resin package 100 can be enhanced (anchor effect). Therefore, the mold resin portion can be more stably fixed to the resin package 100 . Note that the interior of the recess 49 h may be in contact with the translucent resin member 180 . The translucent resin member 180 may be arranged in part of the interior of the recess 49h, and the mold resin portion may be arranged in another part of the interior of the recess 49h. In the example shown in FIG. 40, the inner upper surface of the recess 49h has a cross shape in plan view in which a portion extending in the x-axis direction and a portion extending in the y-axis direction intersect. This can further enhance the anchor effect. The shape of the opening of the concave portion 27 when viewed from above is, for example, a substantially rectangular shape. In the example shown in FIG. 40, the outer edge of the recess 27 is a rectangle with rounded corners (rounded rectangle). Moreover, in the example shown in FIG. 40, the second resin portion 42 extending in the x-axis direction is a straight line. In the example shown in FIG. 40, the width in the y-axis direction in a plan view of the second resin portion 42 extending in the x-axis direction is constant. A part of the second resin portion 42 may have a deformed shape in the shape of the opening of the recess 27 . For example, in plan view, part or all of the second resin portion 42 may include a curved line, or may have an elliptical shape in plan view.

FIG. 41 is a schematic perspective view of still another light emitting device 4002 of Modification 13 from which the mold resin portion is removed. Light-emitting device 4002 differs from light-emitting device 4001 shown in FIG. 40 in that the outer edges of each of the two protrusions 49 arranged in recess 27 of resin package 100 are rectangular in plan view. In the example shown in FIG. 41, the outer edge of the depression 49h of each projection 49 is rectangular.

According to the light emitting device 4002, the width in the y-axis direction of each of the first region 121 to the third region 123 can be made larger than that of the light emitting device 4002. FIG. Therefore, for example, it is relatively easy to dispose the light-emitting elements 50 whose side surfaces are covered with the reflective member 150 in advance in each of the first to third regions 121 to 123 .

In the example shown in FIG. 41, the width of the opening of the depression 49h may be larger than the width of the bottom (inner upper surface) of the depression 49h in a cross section parallel to the yz plane. Thereby, it is easy to fill the inside of the depression 49h with the resin material that will be the mold resin portion. The width of the opening of the recess 49h may be the same as or smaller than the width of the bottom of the recess 49h. In the example shown in FIG. 41, the inner side surface of the recess 49h is a plane inclined with respect to the xz plane. The recess 49h has, for example, a V-shaped cross section.

This specification discloses a light-emitting device and a method for manufacturing the light-emitting device described in the following items.
[Item 1]
A resin package including a plurality of leads and a resin member fixing at least part of the plurality of leads, wherein the resin package includes a first concave portion defined by the resin member and the plurality of leads. , and a plurality of recesses including a second recess and a third recess on the main surface, and the inner upper surface of each of the first recess, the second recess, and the third recess is one of the plurality of leads. a resin package including an exposed area where parts are exposed;
A first light emitting element arranged in the exposed area of the first recess, a second light emitting element arranged in the exposed area of the second recess, and a third light emitting element arranged in the exposed area of the third recess a light emitting element;
A first reflective member arranged in the first recess and positioned around the first light emitting element in plan view, and a second reflective member arranged in the second recess and positioned around the second light emitting element in plan view a reflective member, and a third reflective member disposed in the third concave portion and positioned around the third light emitting element in plan view;
Mold resin including a first lens portion positioned above the first light emitting element, a second lens portion positioned above the second light emitting element, and a third lens portion positioned above the third light emitting element a molded resin portion, wherein each of the first lens portion, the second lens portion, and the third lens portion has a convex shape projecting upward from the main surface side;
with
In plan view, the maximum width of the first lens portion is smaller than the maximum width of the inner upper surface of the first concave portion, and the maximum width of the second lens portion is the maximum width of the inner upper surface of the second concave portion. and the maximum width of the third lens portion is less than the maximum width of the inner upper surface of the third concave portion.
[Item 2]
In plan view, the inner upper surface of each of the first recess, the second recess, and the third recess has a shape that is elongated in one direction, and the width of each inner upper surface in the longitudinal direction is the width in the width direction. The light-emitting device according to item 1, which is 1.5 times or more the width.
[Item 3]
In plan view, the inner upper surface of each of the first concave portion, the second concave portion, and the third concave portion has a shape elongated in one direction, and the width of each inner upper surface in the longitudinal direction is equal to the width of the first lens. and the width of each of the inner upper surfaces in the short direction is greater than the maximum width in the longitudinal direction of each of the first lens portion to the third lens portion. The light-emitting device according to item 1, which is smaller than the maximum width in the hand direction.
[Item 4]
In plan view, the first lens portion overlaps the first light emitting element and at least a portion of the first reflective member, and the second lens portion overlaps the second light emitting element and the second reflection member. 4. The light-emitting device according to any one of items 1 to 3, wherein the third lens portion overlaps at least part of the third light-emitting element and the third reflective member. .
[Item 5]
In plan view, a portion of the first reflecting member is positioned outside the first lens portion, a portion of the second reflecting member is positioned outside the second lens portion, and a portion of the second reflecting member is positioned outside the second lens portion. 5. The light emitting device according to item 4, wherein a portion of the 3 reflective member is positioned outside the third lens portion.
[Item 6]
Width of the first lens part in a cross section including a line connecting a vertex of the first lens part and a center point of the first lens part in plan view, in which the width of the first lens part is the smallest is five times or less the width of the first light emitting element,
Width of the second lens part in a cross section including a line connecting a vertex of the second lens part and a center point of the second lens part in plan view, in which the width of the second lens part is the smallest is 5 times or less the width of the second light emitting element,
Width of the third lens part in a cross section including a line connecting a vertex of the third lens part and a center point of the third lens part in plan view, in which the width of the third lens part is the smallest 6. The light-emitting device according to any one of items 1 to 5, wherein the width of the third light-emitting element is five times or less.
[Item 7]
The inner upper surface of the first recess includes a first connection region and a second connection region in which two of the plurality of leads are partially exposed, and the first light emitting element is connected by a wire. 7. The light emitting device according to any one of items 1 to 6, electrically connected to the first connection region and the second connection region.
[Item 8]
The first concave portion includes a resin wall made of the resin member inside, and the resin wall includes the first light emitting element, at least one of the first connection region and the second connection region in a plan view, 8. The light emitting device according to item 7, wherein a side wall of the resin wall on the side of the first light emitting element is in contact with the first reflective member.
[Item 9]
The plurality of recesses on the main surface of the resin package further includes at least one fourth recess positioned in a region different from the first recess, the second recess, and the third recess, and the at least one the inner upper surface of the fourth recess includes a connection region in which a portion of one of the plurality of leads is exposed;
at least one light emitting element of the first light emitting element, the second light emitting element and the third light emitting element is electrically connected to the connection region of the at least one fourth recess by a wire; 9. A light-emitting device according to item 8.
[Item 10]
The first light emitting element emits a first light, the second light emitting element emits a second light, the third light emitting element emits a third light, the first light, the second light and the third light are different wavelengths of light, and
The light emitting device
a first colored resin member disposed in the first recess and colored in a color similar to that of the first light;
a second colored resin member disposed in the second recess and colored in a color similar to that of the second light;
9. The light emitting device according to any one of items 1 to 8, further comprising: a third colored resin member arranged in the third recess and colored in a color similar to that of the third light.
[Item 11]
A resin package including a plurality of leads and a resin member fixing at least part of the plurality of leads, wherein the resin package includes a first region defined by the resin member and the plurality of leads. , a resin having a second region and a third region on a main surface, wherein each of the first region, the second region, and the third region includes an exposed region in which a part of one of the plurality of leads is exposed; a package;
A first light emitting element arranged in the exposed region of the first region, a second light emitting element arranged in the exposed region of the second region, and a third light emitting device arranged in the exposed region of the third region a light emitting element;
A first reflective member arranged in the first region and positioned around the first light emitting element in plan view, and a second reflective member arranged in the second region and positioned around the second light emitting element in plan view a reflective member, and a third reflective member disposed in the third region and positioned around the third light emitting element in plan view;
Mold resin including a first lens portion positioned above the first light emitting element, a second lens portion positioned above the second light emitting element, and a third lens portion positioned above the third light emitting element a molded resin portion, wherein each of the first lens portion, the second lens portion, and the third lens portion has a convex shape projecting upward from the main surface side;
with
Width of the first lens part in a cross section including a line connecting a vertex of the first lens part and a center point of the first lens part in plan view, in which the width of the first lens part is the smallest is five times or less the width of the first light emitting element,
Width of the second lens part in a cross section including a line connecting a vertex of the second lens part and a center point of the second lens part in plan view, in which the width of the second lens part is the smallest is 5 times or less the width of the second light emitting element,
Width of the third lens part in a cross section including a line connecting a vertex of the third lens part and a center point of the third lens part in plan view, in which the width of the third lens part is the smallest is five times or less the width of the third light emitting element.
[Item 12]
On the main surface of the resin package, the resin member includes a plurality of resin walls spaced apart from each other, and the plurality of resin walls, in plan view, are:
at least one first resin wall defining a portion of the periphery of the first reflective member;
at least one second resin wall defining a portion of the periphery of the second reflective member;
and at least one third resin wall defining part of the periphery of the third reflective member.
[Item 13]
The at least one first resin wall includes a pair of first resin walls facing each other with the first light emitting element interposed therebetween in a plan view, and at least part of the first reflective member is the pair of first resin walls. 13. The light-emitting device according to item 12, located between 1 resin walls.
[Item 14]
The pair of first resin walls face each other across the first light emitting element in a first direction in a plan view,
In a plan view, the first region has
a first portion located between the pair of first resin walls and having the first light emitting element disposed thereon;
and a pair of second portions located across the first portion in a second direction orthogonal to the first direction,
each of the pair of second portions is in contact with the first portion;
14. The light-emitting device according to item 13, wherein the width of the second portion in the first direction is equal to or greater than the width of the first portion in the first direction.
[Item 15]
The main surface of the resin package includes at least one third portion at least partially in contact with the pair of second portions in plan view, and the top surface of the at least one third portion is the second portion. 15. The light-emitting device according to item 14, positioned below the top surface.
[Item 16]
Item 15, wherein the third portion includes two third portions that sandwich the second portion in the first direction in plan view and define the width of the second portion in the first direction. The light-emitting device according to .
[Item 17]
each of the light emitting elements has a rectangular planar shape,
13. Light emission according to item 12, wherein the at least one first resin wall includes two pairs of first resin walls that face each other across two pairs of sides of the quadrangle of the first light emitting element in a plan view. Device.
[Item 18]
The plurality of resin walls are arranged between a first side surface contacting any one of the first reflecting member, the second reflecting member, and the third reflecting member, an upper surface, and between the first side surface and the upper surface. the upper surface of the at least one resin wall is located above the upper end of the first side surface, and the tapered surface is located on the first side surface side 18 .
[Item 19]
The light emitting device further includes a translucent resin member,
19. The light-emitting device according to item 18, wherein the translucent resin member is arranged in the first concave portion and covers at least the first light-emitting element and the first reflective member.
[Item 20]
The main surface of the resin package further includes a first connection region and a second connection region in which two of the plurality of leads are partially exposed, respectively, and the first light emitting element is connected by a wire to the electrically connected to the first connection region and the second connection region;
Items 13 to 19, wherein the at least one first resin wall includes a resin wall positioned between the first light emitting element and at least one of the first connection region and the second connection region in plan view The light-emitting device according to any one of 1.
[Item 21]
The main surface of the resin package further includes a first connection region and a second connection region in which two of the plurality of leads are partially exposed, and the first light emitting element is connected by a first wire. electrically connected to the first connection region and electrically connected to the second connection region by a second wire;
In plan view, the first wire and the second wire respectively extend from the first light emitting element across the gap between the pair of first resin walls to the first connection region and the second connection region. 16. The light emitting device according to any one of items 13 to 15, wherein the light emitting device is
[Item 22]
In plan view, the first reflecting member is located inside the first lens portion, the second reflecting member is located inside the second lens portion, and the third reflecting member is located inside the third lens portion. 22. The light-emitting device according to any one of items 11 to 21, located inside the lens portion.
[Item 23]
The first light emitting element emits a first light, the second light emitting element emits a second light, the third light emitting element emits a third light, the first light, the second light and the third light are different wavelengths of light, and
In the light emitting device, a first colored resin member colored in a color similar to that of the first light and a second colored resin member colored in a color similar to that of the second light are placed between the resin package and the mold resin portion. further comprising a resin member and a third colored resin member colored in the same color as the third light,
At least part of the first colored resin member is located in the first region, at least part of the second colored resin member is located in the second region, and at least part of the third colored resin member 23. The light-emitting device according to any one of items 11 to 22, located in the third region.
[Item 24]
At least part of the first colored resin member is located on the first reflective member,
At least part of the second colored resin member is located on the second reflective member,
At least part of the third colored resin member is located on the third reflective member,
24. A light-emitting device according to item 10 or 23.
[Item 25]
The mold resin part further includes a base part sealing the first light emitting element, the second light emitting element and the third light emitting element, and the first lens part, the second lens part and the third lens part. 25. The light-emitting device according to any one of items 1 to 24, wherein each has a convex shape projecting upward from the upper surface of the base portion.
[Item 26]
each of the first light emitting element, the second light emitting element and the third light emitting element has a rectangular planar shape,
In plan view, each side of the rectangle of at least one of the first light emitting element, the second light emitting element, and the third light emitting element is non-parallel to each side of the rectangle of the other light emitting element 26. The light-emitting device according to any one of items 1 to 25, wherein
[Item 27]
27. Any of items 1 to 26, wherein the height of the apex of at least one of the first lens portion, the second lens portion and the third lens portion is greater than the height of the apex of the other lens portion. The light-emitting device according to (1).
[Item 28]
Each of the first light emitting element, the second light emitting element, and the third light emitting element has a first surface located on the side of the plurality of leads, a second surface located on the side opposite to the first surface, and the at least one electrode located on the second surface;
The at least one electrode of each of the first light emitting element, the second light emitting element, and the third light emitting element is positioned at the center point of the first lens portion, the second lens portion, and the third lens portion in plan view. 28. The light-emitting device according to any one of items 1 to 27, arranged on a line connecting .
[Item 29]
The main surface of the resin package has one concave portion defined by the resin member and the plurality of leads, and the inner upper surface of the one concave portion includes the first area, the second area and the second area. including 3 areas,
On the main surface of the resin package, the resin member comprises:
a first resin portion positioned on the inner upper surface of the one recess;
a second resin portion surrounding the inner upper surface of the one recess in plan view,
The first resin portion includes at least one convex portion,
12. The light emitting device according to item 11, wherein the height of the top surface of the at least one convex portion and the height of the top surface of the second resin portion are the same.
[Item 30]
Item 30. The light-emitting device according to item 29, wherein the first resin portion has a stepped surface facing in the same direction as the main surface on a side surface of the at least one convex portion.
[Item 31]
Item 30. The light-emitting device according to item 30, wherein the top surface of the first light-emitting element is positioned above the stepped surface.
[Item 32]
32. A light emitting device according to any one of items 29 to 31, wherein the top surface of the at least one protrusion has a depression.
[Item 33]
The main surface of the resin package has one concave portion defined by the resin member and the plurality of leads, and the inner upper surface of the one concave portion includes the first area, the second area and the second area. including 3 areas,
On the main surface of the resin package, the resin member comprises:
a first resin portion positioned on the inner upper surface of the one recess;
a second resin portion surrounding the inner upper surface of the one recess in plan view,
The first resin portion includes at least one convex portion,
Item 12. The light-emitting device according to item 11, wherein the top surface of the at least one convex portion is positioned above the top surfaces of the plurality of light-emitting elements.
[Item 34]
34. A light emitting device according to item 29 or 33, wherein the first reflective member, the second reflective member and the third reflective member are separated from each other.

The light-emitting device of the present disclosure can be suitably used for light-emitting devices for various purposes. In particular, it is suitably used for display devices such as LED displays. LED displays are used, for example, in billboards, large-screen televisions, advertisements, traffic signs, stereoscopic displays, lighting fixtures, and the like.

10, 10a to 13b, 10b to 13b: leads, 20, 25, 26, 27: recesses, 20a: inner upper surface of recesses, 20c: inner surface of recesses, 21: first recesses, 22: second recesses, 23: Third recess 24: Fourth recess 30, 30a, 30b, 30w: Lead exposed area 40: Dark-colored resin member 41: First resin portion 42: Second resin portion 43: Third resin portion , 44: groove, 45: hole, 46, 46a to 46k: resin groove, 47: fourth resin part, 50: light emitting element, 51: first light emitting element, 52: second light emitting element, 53: third light emitting element , 51a, 52a, 53a: second surface, 60: mold resin portion, 61: base portion, 70: lens portion, 71: first lens portion, 72: second lens portion, 73: third lens portion, 80, 81 to 83: wire, 100: resin package, 100a: main surface of resin package, 100b: back surface of resin package, 100c to 100f: side portion of resin package, 120: region, 121: first region, 122: second Region 123: Third region 150: Reflective member 150a: First resin material 151: First reflective member 152: Second reflective member 153: Third reflective member 160: Colored resin member , 161: first colored resin member, 162: second colored resin member, 163: third colored resin member, 180: precoat resin (translucent resin member), 190: second dark-colored resin member, 192: height Viscosity resins 241a-243a, 241b-243b: Fourth recesses 300, 310, 320, 330, 340, 350, 360, 370: Resin walls 301, 311, 321, 331, 341, 351, 361, 371: First resin wall 302, 312, 322, 332, 342, 352, 362, 372 Second resin wall 303, 313, 323, 333, 343, 353, 363, 373 Third resin wall 400-403 : resin wall, 501, 502: resin block, 611: light emitting part, 612: non-light emitting part, 800: nozzle, 801: nozzle arrangement area, 1000 to 1005, 1006, 2000 to 2007, 3000, 3001: light emitting device, D1 : first direction, D2: second direction, P1: first portion, P2: second portion, e1, e2: electrode, dr: element mounting region, sr: side region, wr1: first connection region, wr2: Second connection area

Claims (32)

A resin package including a plurality of leads and a resin member fixing at least part of the plurality of leads, wherein the resin package includes a first concave portion defined by the resin member and the plurality of leads. , and a plurality of recesses including a second recess and a third recess on the main surface, and the inner upper surface of each of the first recess, the second recess, and the third recess is one of the plurality of leads. a resin package including an exposed area where parts are exposed;
A first light emitting element arranged in the exposed area of the first recess, a second light emitting element arranged in the exposed area of the second recess, and a third light emitting element arranged in the exposed area of the third recess a light emitting element;
A first reflective member arranged in the first recess and positioned around the first light emitting element in plan view, and a second reflective member arranged in the second recess and positioned around the second light emitting element in plan view a reflective member, and a third reflective member disposed in the third concave portion and positioned around the third light emitting element in plan view;
Mold resin including a first lens portion positioned above the first light emitting element, a second lens portion positioned above the second light emitting element, and a third lens portion positioned above the third light emitting element a molded resin portion, wherein each of the first lens portion, the second lens portion, and the third lens portion has a convex shape projecting upward from the main surface side;
with
In plan view, the maximum width of the first lens portion is smaller than the maximum width of the inner upper surface of the first concave portion, and the maximum width of the second lens portion is the maximum width of the inner upper surface of the second concave portion. and the maximum width of the third lens portion is less than the maximum width of the inner upper surface of the third concave portion. In plan view, the inner upper surface of each of the first recess, the second recess, and the third recess has a shape that is elongated in one direction, and the width of each inner upper surface in the longitudinal direction is the width in the width direction. 2. The light-emitting device of claim 1, which is 1.5 times or more the width. In plan view, the inner upper surface of each of the first concave portion, the second concave portion, and the third concave portion has a shape elongated in one direction, and the width of each inner upper surface in the longitudinal direction is equal to the width of the first lens. and the width of each of the inner upper surfaces in the short direction is greater than the maximum width in the longitudinal direction of each of the first lens portion to the third lens portion. 2. A light emitting device according to claim 1, which is smaller than the maximum width in the hand direction. In plan view, the first lens portion overlaps the first light emitting element and at least a portion of the first reflective member, and the second lens portion overlaps the second light emitting element and the second reflection member. 4. The light-emitting device according to any one of claims 1 to 3, wherein the third lens portion overlaps at least a portion of the third light-emitting element and at least a portion of the third reflective member. luminous device. In plan view, a portion of the first reflecting member is positioned outside the first lens portion, a portion of the second reflecting member is positioned outside the second lens portion, and a portion of the second reflecting member is positioned outside the second lens portion. 5. The light emitting device of claim 4, wherein a portion of the 3 reflective member is positioned outside the third lens portion. Width of the first lens part in a cross section including a line connecting a vertex of the first lens part and a center point of the first lens part in plan view, in which the width of the first lens part is the smallest is five times or less the width of the first light emitting element,
Width of the second lens part in a cross section including a line connecting a vertex of the second lens part and a center point of the second lens part in plan view, in which the width of the second lens part is the smallest is 5 times or less the width of the second light emitting element,
Width of the third lens part in a cross section including a line connecting a vertex of the third lens part and a center point of the third lens part in plan view, in which the width of the third lens part is the smallest 4. The light-emitting device according to claim 1, wherein the width of the third light-emitting element is five times or less. The inner upper surface of the first recess includes a first connection region and a second connection region in which two of the plurality of leads are partially exposed, and the first light emitting element is connected by a wire. 4. The light-emitting device according to claim 1, electrically connected to the first connection region and the second connection region. The first concave portion includes a resin wall made of the resin member inside, and the resin wall includes the first light emitting element, at least one of the first connection region and the second connection region in a plan view, 8 . The light emitting device according to claim 7 , wherein a side wall of said resin wall on the side of said first light emitting element is in contact with said first reflective member. The plurality of recesses on the main surface of the resin package further includes at least one fourth recess positioned in a region different from the first recess, the second recess, and the third recess, and the at least one the inner upper surface of the fourth recess includes a connection region in which a portion of one of the plurality of leads is exposed;
at least one light emitting element of the first light emitting element, the second light emitting element and the third light emitting element is electrically connected to the connection region of the at least one fourth recess by a wire; The light emitting device according to claim 8. The first light emitting element emits a first light, the second light emitting element emits a second light, the third light emitting element emits a third light, the first light, the second light and the third light are different wavelengths of light, and
The light emitting device
a first colored resin member disposed in the first recess and colored in a color similar to that of the first light;
a second colored resin member disposed in the second recess and colored in a color similar to that of the second light;
The light emitting device according to any one of claims 1 to 3, further comprising: a third colored resin member arranged in the third recess and colored in a color similar to that of the third light. A resin package including a plurality of leads and a resin member fixing at least part of the plurality of leads, wherein the resin package includes a first region defined by the resin member and the plurality of leads. , a resin having a second region and a third region on a main surface, wherein each of the first region, the second region, and the third region includes an exposed region in which a part of one of the plurality of leads is exposed; a package;
A first light emitting element arranged in the exposed region of the first region, a second light emitting element arranged in the exposed region of the second region, and a third light emitting device arranged in the exposed region of the third region a light emitting element;
A first reflective member arranged in the first region and positioned around the first light emitting element in plan view, and a second reflective member arranged in the second region and positioned around the second light emitting element in plan view a reflective member, and a third reflective member disposed in the third region and positioned around the third light emitting element in plan view;
Mold resin including a first lens portion positioned above the first light emitting element, a second lens portion positioned above the second light emitting element, and a third lens portion positioned above the third light emitting element a molded resin portion, wherein each of the first lens portion, the second lens portion, and the third lens portion has a convex shape projecting upward from the main surface side;
with
Width of the first lens part in a cross section including a line connecting a vertex of the first lens part and a center point of the first lens part in plan view, in which the width of the first lens part is the smallest is five times or less the width of the first light emitting element,
Width of the second lens part in a cross section including a line connecting a vertex of the second lens part and a center point of the second lens part in plan view, in which the width of the second lens part is the smallest is 5 times or less the width of the second light emitting element,
Width of the third lens part in a cross section including a line connecting a vertex of the third lens part and a center point of the third lens part in plan view, in which the width of the third lens part is the smallest is five times or less the width of the third light emitting element. On the main surface of the resin package, the resin member includes a plurality of resin walls spaced apart from each other, and the plurality of resin walls, in plan view, are:
at least one first resin wall defining a portion of the periphery of the first reflective member;
at least one second resin wall defining a portion of the periphery of the second reflective member;
12. The light emitting device according to claim 11, comprising at least one third resin wall defining part of the periphery of said third reflective member. The at least one first resin wall includes a pair of first resin walls facing each other with the first light emitting element interposed therebetween in a plan view, and at least part of the first reflective member is the pair of first resin walls. 13. The light emitting device of claim 12, located between one resin wall. The pair of first resin walls face each other across the first light emitting element in a first direction in a plan view,
In a plan view, the first region has
a first portion located between the pair of first resin walls and having the first light emitting element disposed thereon;
and a pair of second portions located across the first portion in a second direction orthogonal to the first direction,
each of the pair of second portions is in contact with the first portion;
14. The light emitting device according to claim 13, wherein the width of said second portion in said first direction is greater than or equal to the width of said first portion in said first direction. The main surface of the resin package includes at least one third portion at least partially in contact with the pair of second portions in plan view, and the top surface of the at least one third portion is the second portion. 15. A light emitting device according to claim 14, located below the top surface. 3. The third portion includes two third portions that sandwich the second portion in the first direction in plan view and define the width of the second portion in the first direction. 16. The light-emitting device according to 15. each of the light emitting elements has a rectangular planar shape,
13. The at least one first resin wall according to claim 12, wherein the at least one first resin wall includes two pairs of first resin walls that face each other across two sets of sides of the quadrangle of the first light emitting element in plan view. Luminescent device. The plurality of resin walls are arranged between a first side surface contacting any one of the first reflecting member, the second reflecting member, and the third reflecting member, an upper surface, and between the first side surface and the upper surface. the upper surface of the at least one resin wall is located above the upper end of the first side surface, and the tapered surface is located on the first side surface side 15. The light-emitting device according to any one of claims 12 to 14, wherein the light-emitting device inclines from the top toward the top surface. The light emitting device further includes a translucent resin member,
19. The light emitting device according to claim 18, wherein said translucent resin member is arranged in said first concave portion and covers at least said first light emitting element and said first reflective member. The main surface of the resin package further includes a first connection region and a second connection region in which two of the plurality of leads are partially exposed, respectively, and the first light emitting element is connected by a wire to the electrically connected to the first connection region and the second connection region;
from claim 13, wherein the at least one first resin wall includes a resin wall located between the first light emitting element and at least one of the first connection region and the second connection region in plan view 16. The light emitting device according to any one of 15. The main surface of the resin package further includes a first connection region and a second connection region in which two of the plurality of leads are partially exposed, and the first light emitting element is connected by a first wire. electrically connected to the first connection region and electrically connected to the second connection region by a second wire;
In plan view, the first wire and the second wire respectively extend from the first light emitting element across the gap between the pair of first resin walls to the first connection region and the second connection region. 16. A light emitting device according to any one of claims 13 to 15, wherein In plan view, the first reflecting member is located inside the first lens portion, the second reflecting member is located inside the second lens portion, and the third reflecting member is located inside the third lens portion. 14. The light emitting device according to any one of claims 11 to 13, located inside the lens portion. The first light emitting element emits a first light, the second light emitting element emits a second light, the third light emitting element emits a third light, the first light, the second light and the third light are different wavelengths of light, and
In the light emitting device, a first colored resin member colored in a color similar to that of the first light and a second colored resin member colored in a color similar to that of the second light are placed between the resin package and the mold resin portion. further comprising a resin member and a third colored resin member colored in the same color as the third light,
At least part of the first colored resin member is located in the first region, at least part of the second colored resin member is located in the second region, and at least part of the third colored resin member is located in the third region. At least part of the first colored resin member is located on the first reflective member,
At least part of the second colored resin member is located on the second reflective member,
At least part of the third colored resin member is located on the third reflective member,
The light emitting device according to claim 10. The mold resin part further includes a base part sealing the first light emitting element, the second light emitting element and the third light emitting element, and the first lens part, the second lens part and the third lens part. 12. The light-emitting device according to claim 1, wherein each has a convex shape projecting upward from the upper surface of the base portion. each of the first light emitting element, the second light emitting element and the third light emitting element has a rectangular planar shape,
In plan view, each side of the rectangle of at least one of the first light emitting element, the second light emitting element, and the third light emitting element is non-parallel to each side of the rectangle of the other light emitting element The light-emitting device according to claim 1 or 11, wherein 12. The height of the apex of at least one of the first lens, the second lens, and the third lens is greater than the height of the apex of the other lens. A light emitting device as described. Each of the first light emitting element, the second light emitting element, and the third light emitting element has a first surface located on the side of the plurality of leads, a second surface located on the side opposite to the first surface, and the at least one electrode located on the second surface;
The at least one electrode of each of the first light emitting element, the second light emitting element, and the third light emitting element is positioned at the center point of the first lens portion, the second lens portion, and the third lens portion in plan view. 12. The light-emitting device according to claim 1, arranged on a line connecting the . The main surface of the resin package has one concave portion defined by the resin member and the plurality of leads, and the inner upper surface of the one concave portion includes the first area, the second area and the second area. including 3 areas,
On the main surface of the resin package, the resin member comprises:
a first resin portion positioned on the inner upper surface of the one recess;
a second resin portion surrounding the inner upper surface of the one recess in plan view,
The first resin portion includes at least one convex portion,
12. The light emitting device according to claim 11, wherein the height of the top surface of said at least one convex portion and the height of the top surface of said second resin portion are the same. 30. The light-emitting device according to claim 29, wherein said first resin portion has a stepped surface facing in the same direction as said main surface on a side surface of said at least one convex portion. 31. The light emitting device according to claim 30, wherein the top surface of said first light emitting element is located above said step surface. 32. A light emitting device according to any one of claims 29 to 31, wherein said top surface of said at least one protrusion comprises a depression.

Images