Light-emitting device

Abstract

To provide a light-emitting device capable of improving light extraction efficiency.SOLUTION: A light-emitting device includes a support, a first light-emitting element and a second light-emitting element aligned in a first direction and positioned on the support, a translucent member including a first lens portion overlapping the first light-emitting element, a second lens portion overlapping the second light-emitting element in a top view, a first connecting portion connecting the first lens portion and the second lens portion, and a reflective member overlapping the first connecting portion in the top view.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE PRESENT EMBODIMENT An embodiment of the present invention relates to a light emitting device. [Background technology]

[0002] Light-emitting devices using light-emitting elements such as LEDs can easily achieve high light-emitting efficiency, and are therefore used in a wide range of fields such as lighting, vehicle-mounted lighting, displays, liquid crystal backlights, etc. Patent Document 1 discloses a light-emitting device including a first light-emitting element, a second light-emitting element, a first lens portion positioned above the first light-emitting element, and a second lens portion positioned above the second light-emitting element. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2023-051717 A Summary of the Invention [Problem to be solved by the invention]

[0004] There is a demand for light emitting devices with further improved light extraction efficiency. An object of an embodiment of the present invention is to provide a light emitting device that can improve the light extraction efficiency. [Means for solving the problem]

[0005] According to one aspect of the present invention, a light emitting device includes a support, a first light emitting element and a second light emitting element aligned in a first direction and positioned on the support, a translucent member including a first lens portion overlapping the first light emitting element in a top view, a second lens portion overlapping the second light emitting element, and a first connecting portion connecting the first lens portion and the second lens portion, and a reflective member overlapping the first connecting portion in a top view. Effect of the Invention

[0006] According to the light emitting device of one embodiment of the present invention, the light extraction efficiency can be improved. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a schematic top view of a light emitting device according to a first embodiment. [Diagram 2] 2 is a schematic cross-sectional view of the light emitting device taken along line II-II in FIG. [Diagram 3] 1 is a schematic front view of a light emitting device according to a first embodiment. [Figure 4] 1 is a schematic right side view of the light emitting device according to the first embodiment. [Diagram 5] 1 is a schematic top view of a support, a light-emitting element, and a wire according to Embodiment 1. FIG. [Figure 6] 2 is a schematic cross-sectional view of the light emitting device taken along line VI-VI in FIG. [Figure 7] 1 is a schematic top view of a support, a light-emitting element, a wire, a reflecting member, a light-absorbing member, and a second covering member according to the first embodiment. FIG. [Figure 8] 8 is a schematic cross-sectional view of the light emitting device taken along line VIII-VIII in FIG. [Figure 9] 3 is a schematic enlarged view of the vicinity of a first lens portion and a second lens portion of the light emitting device according to the first embodiment. FIG. [Figure 10] 4 is a schematic top view of a modified example of the light emitting device according to the first embodiment. FIG. [Figure 11] FIG. 4 is a schematic top view of a light emitting device according to a second embodiment. [Figure 12] FIG. 11 is a schematic top view of a support, a light-emitting element, and a wire according to the second embodiment. [Figure 13] 13 is a schematic cross-sectional view of the light emitting device taken along line XIII-XIII in FIG. 11. [Figure 14] FIG. 11 is a schematic top view of a support, a light-emitting element, a wire, a reflecting member, a light-absorbing member, and a second covering member according to a second embodiment. [Figure 15] FIG. 11 is a schematic top view of a light emitting device according to a third embodiment. [Figure 16] FIG. 11 is a schematic right side view of the light emitting device according to the third embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, the embodiments will be described with reference to the drawings. Since each drawing is a schematic illustration of the embodiment, the scale, interval, or positional relationship of each member may be exaggerated, or some of the members may be omitted. In this specification, the direction of the Z-axis arrow is defined as the upward direction, and the direction opposite to the direction of the Z-axis arrow is defined as the downward direction. Viewing an object from above is called a top view, and a top view is synonymous with a plan view. In addition, an end view showing only a cut surface may be shown as a cross-sectional view.

[0009] In the following description, components having substantially the same functions are indicated by common reference symbols, and descriptions may be omitted. In addition, terms indicating a specific direction or position (for example, "upper", "lower", and other terms including these terms) may be used. However, these terms are merely used for the sake of clarity of the relative direction or position in the referenced drawings. As long as the relationship of the relative direction or position by terms such as "upper" and "lower" in the referenced drawings is the same, the arrangement in drawings other than this disclosure, actual products, etc. may not be the same as that in the referenced drawings. In this specification, "parallel" includes not only cases where two straight lines, sides, faces, etc. do not intersect even when extended, but also cases where the angle formed by the two straight lines, sides, faces, etc. is within a range of 10°. In this specification, the positional relationship expressed as "upper" includes cases where they are in contact and cases where they are not in contact but are located above.

[0010] [Embodiment 1] The light emitting device 1001 of the first embodiment will be described with reference to Figs. 1 to 10. Fig. 1 is a drawing of the light emitting device 1001 as viewed from the light emitting surface side. In Figs. 3 and 4, the light-transmitting member 30 is hatched. In Fig. 16, which will be described later, the light-transmitting member 30 is also hatched. As shown in Fig. 1, two directions parallel to the light emitting surface of the light emitting device 1001 and perpendicular to each other are defined as the X direction and the Y direction. The direction perpendicular to the X direction and the Y direction is defined as the Z direction. In this specification, the arrow direction of the X axis is defined as the +X direction, the direction opposite to the arrow direction of the X axis is defined as the -X direction, the arrow direction of the Y axis is defined as the +Y direction, and the direction opposite to the arrow direction of the Y axis is defined as the -Y direction. In this specification, the direction inclined at an angle of 0° or more and less than 360° from the X direction in the XY plane, which is a plane parallel to the X direction and the Y direction, is defined as the horizontal direction, and the Z direction is defined as the vertical direction.

[0011] The light emitting device 1001 includes a support 10, a light emitting element 20, a light-transmitting member 30, and a reflecting member 40. The light emitting element 20 includes a first light emitting element 21 and a second light emitting element 22. The first light emitting element 21 is located on the support 10. The second light emitting element 22 is located on the support 10. The first light emitting element and the second light emitting element are located side by side in a first direction. The light-transmitting member 30 includes a first lens portion 31L, a second lens portion 32L, and a first connecting portion 31C. In a top view, the first lens portion 31L overlaps with the first light emitting element 21. In a top view, the second lens portion 32L overlaps with the second light emitting element 22. The first connecting portion 31C connects the first lens portion 31L and the second lens portion 32L. In a top view, the reflecting member 40 overlaps with the first connecting portion 31C.

[0012] The surface area of ​​the light-transmitting member 30 is easily increased by including the first connecting portion 31C connecting the first lens portion 31L and the second lens portion 32L. This makes it easier for the light from the first light-emitting element 21 and / or the second light-emitting element 22 to be extracted from the light-transmitting member 30 to the outside of the light-emitting device 1001. This makes it easier to improve the light extraction efficiency of the light-emitting device 1001. In addition, the reflection member 40 overlaps with the first connecting portion 31C in a top view, making it easier to increase the area of ​​the reflection member 40 in a top view. This makes it easier to reduce the absorption of the light from the first light-emitting element 21 and / or the second light-emitting element 22 by the support 10. This makes it easier to improve the light extraction efficiency of the light-emitting device 1001.

[0013] Each element constituting the light emitting device 1001 will now be described in detail.

[0014] (Support 10) The support 10 is a member on which the light emitting element 20 is placed. The support 10 and the light emitting element 20 are bonded by a known bonding material such as resin, solder, or conductive paste. As shown in FIG. 2, in the first embodiment, the first light emitting element 21 and the second light emitting element 22 are bonded to the first surface 101 of the support 10. As shown in FIGS. 2, 3, 4, and 5, the support 10 of the first embodiment includes a plurality of leads 12 and a resin member 13. The first surface 101 of the support 10 is defined by a part of the upper surface of the plurality of leads 12 and a part of the upper surface of the resin member 13. At least a part of the upper surfaces of the plurality of leads 12 and at least a part of the upper surface of the resin member 13, which define the first surface 101 of the support 10, are located on the same plane. In this specification, the term "on the same plane" means that the difference between the surfaces is allowed to vary within ±15 μm. The upper surface of the lead 12 may have a recess.

[0015] The lead 12 is conductive and functions as an electrode for supplying power to the light emitting element 20. As shown in FIG. 5, the lead 12 of the first embodiment includes a first lead 12A, a second lead 12B, a third lead 12C, a fourth lead 12D, a fifth lead 12E, and a sixth lead 12F. The first light emitting element 21 is located on the first lead 12A. The second light emitting element 22 is located on the second lead 12B. The third light emitting element 23, which will be described later, is located on the third lead 12C. The first light emitting element 21 is electrically connected to the first lead 12A and the fourth lead 12D via a wire W1. The second light emitting element 22 is electrically connected to the second lead 12B and the fifth lead 12E via a wire. The third light emitting element 23 is electrically connected to the third lead 12C and the sixth lead 12F via a wire. It is preferable that the first light emitting element 21, the second light emitting element 22, and the third light emitting element 23 can be driven independently. This makes it easier to adjust the chromaticity of the light emitting device 1001. The light emitting elements 20 may be connected in series or in parallel, or in a combination of series and parallel connections.

[0016] The first lead 12A, the second lead 12B, and the third lead 12C are positioned side by side in the first direction (Y direction). The fourth lead 12D, the fifth lead 12E, and the sixth lead 12F are positioned side by side in the first direction (Y direction). The first lead 12A and the fourth lead 12D are positioned side by side in the second direction (X direction). The second lead 12B and the fifth lead 12E are positioned side by side in the second direction (X direction). The third lead 12C and the sixth lead 12F are positioned side by side in the second direction (X direction).

[0017] As shown in FIG. 6, the first lead 12A of the first embodiment is bent to include a first lead first portion 12A1 located on the upper surface side of the support 10, a first lead second portion 12A2 located on the lower surface side of the support 10, and a first lead third portion 12A3 located between the first lead first portion 12A1 and the first lead second portion 12A2. At least a part of the upper surface of the first lead first portion 12A1 is exposed from the resin member 13 and the first light emitting element 21 is placed thereon. At least a part of the lower surface of the first lead second portion 12A2 is exposed from the resin member 13 and serves as a mounting surface when the light emitting device 1001 is fixed to a mounting board. Each of the second lead, the third lead, the fourth lead, the fifth lead, and the sixth lead is bent to include a first portion located on the upper surface side of the support, a second portion located on the lower surface side of the support, and a third portion located between the first and second portions.

[0018] The base material of the lead 12 may be, for example, copper, aluminum, gold, silver, iron, nickel, or alloys thereof, phosphor bronze, copper containing iron, or other metals. These may be a single layer or a laminated structure (for example, a clad material). In particular, it is preferable to use copper, which is inexpensive and has high heat dissipation properties, as the base material. The lead may have a metal layer on the surface of the base material. The metal layer includes, for example, gold, silver, aluminum, nickel, palladium, rhodium, copper, or alloys thereof. The metal layer may be provided on the entire surface of the lead, or may be provided partially. The metal layer may be different between the region formed on the upper surface of the lead and the region formed on the lower surface of the lead. For example, the metal layer formed on the upper surface of the lead is a metal layer consisting of multiple layers including metal layers of nickel and silver, and the metal layer formed on the lower surface of the lead is a metal layer that does not include a metal layer of nickel. The metal layer of gold or the like formed on the upper surface of the lead may be thicker than the metal layer of gold or the like formed on the lower surface of the lead.

[0019] When a silver-containing metal layer is formed on the outermost surface of the lead 12, it is preferable to provide a protective layer such as silicon oxide on the surface of the silver-containing metal layer. This can prevent the silver-containing metal layer from discoloring due to sulfur components in the atmosphere. The protective layer can be formed by a vacuum process such as sputtering, but other known methods may also be used.

[0020] The resin member 13 has insulating properties. The resin member 13 holds a plurality of leads 12. The resin member 13 may use a known material such as a thermoplastic resin or a thermosetting resin as a base resin material. Examples of the thermoplastic resin that may be used include aromatic polyamide resin, polyphthalamide resin (PPA), sulfone resin, polyamideimide resin (PAI), polyketone resin (PK), polycarbonate resin, polyphenylene sulfide (PPS), liquid crystal polymer (LCP), ABS resin, and PBT resin. Examples of the thermosetting resin that may be used include epoxy resin, modified epoxy resin, silicone resin, and modified silicone resin.

[0021] The resin member 13 may have a colorant added to the resin material serving as the base material. As the colorant, various dyes and pigments are suitably used. Specifically, Cr2O3, MnO2, Fe2O3, carbon black, titanium black, and the like may be used. The amount of the colorant added may be, for example, 0.3 mass% or more and 3.5 mass% or less, preferably 1.0 mass% or more and 2.5 mass% or less, relative to the resin material serving as the base material. For example, the resin member 13 may be polyphthalamide (PPA) to which 2 mass% of dark-colored particles such as carbon have been added. The resin member 13 may contain a glass filler or the like. By containing the glass filler in the resin member 13, the strength of the resin member 13 is easily improved. The glass filler may be colored dark with carbon black or the like.

[0022] When the light emitting device 1001 is used in a display device such as an LED display, the resin member 13 is preferably made of a dark-colored resin. By making the resin member 13 of a dark-colored resin such as black or gray, it becomes easier to reduce reflection of external light such as sunlight and indoor light by the resin member 13. This makes it easier to reduce a decrease in the contrast ratio between when the light emitting device 1001 is turned on and when it is turned off, which is caused by reflection of external light. The resin member 13 of the first embodiment is made of a dark-colored resin. In this specification, "dark color" refers to a color with a brightness of 4.0 or less in the Munsell color system (20 hues). There is no particular limitation on the hue, and the saturation can be determined arbitrarily as necessary. The brightness is preferably 4.0 or less and the saturation is preferably 4.0 or less.

[0023] Light from the light emitting device 1001 of the first embodiment is mainly extracted to the outside from the upper surface side of the light emitting device 1001. For this reason, at least a part of the upper surface of the resin member 13 is preferably dark colored. By having at least a part of the upper surface of the resin member 13 located on the light emitting surface side be dark colored, it becomes easier to reduce a decrease in the contrast ratio between when the light emitting device 1001 is turned on and when it is turned off, which is caused by the reflection of external light on the upper surface of the light emitting device 1001. The resin member 13 may be colored in a dark color, or may be a white resin with a dark ink printed thereon. Alternatively, the resin member 13 may be molded with two colors, a dark resin and a white resin. For example, the white resin contains a light reflective substance in the resin material that is the base material. As the light reflective substance, it is preferable to use a material that is difficult to absorb light from the light emitting element 20 and has a large refractive index difference with respect to the resin material that is the base material. In this way, it becomes easier to reduce the absorption of light from the light emitting element 20 by the resin member 13. The light reflective material may be particles of titania, silica, alumina, zinc oxide, magnesium oxide, zirconia, yttria, calcium fluoride, magnesium fluoride, niobium pentoxide, barium titanate, tantalum pentoxide, barium sulfate, glass, etc. The resin member 13 may be formed only from a white resin.

[0024] The support 10 may be a wiring board including a substrate and wiring. The substrate may be made of resin, ceramics, glass, or the like. The resin may be any known material such as the above-mentioned thermosetting resin or thermoplastic resin. The ceramic may be aluminum oxide, aluminum nitride, zirconium oxide, zirconium nitride, titanium oxide, titanium nitride, or a mixture thereof. The wiring may be made of copper, iron, nickel, tungsten, chromium, aluminum, silver, gold, titanium, palladium, rhodium, or an alloy thereof. The metal or alloy may be a single layer or a multilayer.

[0025] As shown in FIG. 2 and FIG. 5, the support 10 of the embodiment 1 includes one element recess 14 for accommodating the light emitting element 20. The element recess 14 of the embodiment 1 includes a first element recess 14A and a second element recess 14B. The first element recess 14A and the second element recess 14B are located on the lower side of the element recess 14. The first element recess 14A and the second element recess 14B are partitioned by a side wall 11W. The first element recess 14A is defined by the side wall 11W and the first surface 101. The side wall 11W may be formed of a member different from the resin member 13, or the side wall 11W may be formed of the resin member 13 as in the embodiment 1. The first light emitting element 21 and the second light emitting element 22 are located in the first element recess 14A. The third light emitting element 23 is located in the second element recess 14B. In the first element recess 14A, a reflecting member 40 is located as shown in FIG. 7. The reflecting member 40 of the first embodiment is in contact with the sidewall 11W that defines the first element recess 14A. In this way, the shape of the reflecting member 40 in top view can be easily controlled by the first element recess 14A. This makes it easier to improve the yield of the light emitting device 1001. In the first embodiment, the reflecting member 40 located in the first element recess 14A prevents the light from the first light emitting element 21 and the second light emitting element 22 from hitting the inner surface of the sidewall 11W. The light from the first light emitting element 21 and the second light emitting element 22 may hit the inner surface of the sidewall 11W. As shown in FIG. 7, the light absorbing member 50 described later is located in the second element recess 14B. The shape of the light absorbing member 50 in top view can be easily controlled by the second element recess 14B. This makes it easier to improve the yield of the light emitting device 1001.

[0026] As shown in FIG. 5, the support 10 of the first embodiment includes a wire recess 15 where one end of the wire is located. The element recess 14 of the first embodiment includes a wire recess 15. The wire recess 15 is located below the element recess 14. A part of the wire recess 15 is defined by the upper surface of at least one lead 12. The upper surface of the lead 12 that defines a part of the wire recess 15 and the wire are electrically connected. The wire recess 15 of the first embodiment includes a first wire recess 15A and a second wire recess 15B. As shown in FIG. 7, a second covering member 70 described later is located in the first wire recess 15A and the second wire recess 15B. The second covering member 70 of the first embodiment contacts the side surface that defines the wire recess 15. In this way, the shape of the second covering member 70 in a top view can be easily controlled by the first wire recess 15A and / or the second wire recess 15B. This makes it easier to improve the yield of the light emitting device 1001.

[0027] 5, it is preferable that the resin member 13 includes a coating resin portion 13A that covers the upper surface of the lead 12 in the wire recess 15. This makes it easier to improve the adhesion between the lead 12 and the resin member 13. Also, the inclusion of the coating resin portion 13A that covers the upper surface of the lead 12 makes it easier to reduce deformation of the lead 12 due to heat.

[0028] (Light emitting element 20) The light emitting device 1001 includes a plurality of light emitting elements 20 located on a support 10. In this embodiment, the light emitting device 1001 includes a first light emitting element 21, a second light emitting element 22, and a third light emitting element 23. The number of light emitting elements 20 included in the light emitting device 1001 may be one, two, three, or four or more.

[0029] The light emitting element 20 includes a semiconductor laminate. The semiconductor laminate includes, for example, an element substrate such as sapphire, gallium nitride, gallium arsenide, or aluminum nitride, an n-type semiconductor layer disposed on the element substrate, a p-type semiconductor layer, and a light emitting layer sandwiched between the n-type semiconductor layer and the p-type semiconductor layer. The light emitting element 20 also includes an n-side electrode electrically connected to the n-type semiconductor layer, and a p-side electrode electrically connected to the p-type semiconductor layer. The n-side electrode and the p-side electrode form a part of the upper surface of the light emitting element 20. The light emitting element 20 does not need to include an element substrate such as sapphire, gallium nitride, gallium arsenide, or aluminum nitride. This makes it easier to miniaturize the light emitting element 20.

[0030] When the light emitting element 20 includes a light-transmitting element substrate (hereinafter referred to as a light-transmitting substrate) such as sapphire or gallium nitride, the light of the light emitting element 20 is also likely to be emitted from the side of the light-transmitting substrate. Therefore, when the light emitting element 20 includes a light-transmitting substrate, the ratio of light extracted from the side of the light emitting element to light extracted from the upper surface of the light emitting element is likely to increase. A light-transmitting substrate is often used as the element substrate of the light emitting element 20 that emits blue or green light. In this specification, a light-transmitting element substrate means an element substrate having a transmittance of 60% or more at the peak wavelength of the light emitting element.

[0031] When the light emitting element 20 includes an element substrate (hereinafter referred to as a light-shielding substrate) having a light-shielding property such as gallium arsenide or aluminum nitride, the light of the light emitting element 20 is less likely to be emitted from the side of the light-shielding substrate. Therefore, when the light emitting element 20 includes a light-shielding substrate, the ratio of the light extracted from the side of the light emitting element to the light extracted from the upper surface of the light emitting element is more likely to be lower than when the light emitting element 20 includes a light-transmitting substrate. A light-shielding substrate is often used as the element substrate of the light emitting element 20 that emits red light. In this specification, the element substrate having a light-shielding property means an element substrate having a transmittance of 50% or less at the peak wavelength of the light emitting element.

[0032] The structure of the light emitting layer may be a structure having a single active layer such as a double heterostructure or a single quantum well structure (SQW), or a structure having a group of active layers such as a multiple quantum well structure (MQW). The light emitting layer can emit visible light or ultraviolet light. The light emitting layer can emit visible light ranging from blue to red. Examples of semiconductor laminates including such a light emitting layer include In x Al y Ga 1-x-y N (0≦x, 0≦y, x+y≦1). The semiconductor laminate can include at least one light-emitting layer capable of emitting the above-mentioned light. For example, the semiconductor laminate may have a structure including one or more light-emitting layers between an n-type semiconductor layer and a p-type semiconductor layer, or may have a structure in which a structure including an n-type semiconductor layer, a light-emitting layer, and a p-type semiconductor layer in sequence is repeated multiple times. When the semiconductor laminate includes multiple light-emitting layers, the semiconductor laminate may include light-emitting layers having different peak wavelengths, or may include light-emitting layers having the same peak wavelength. Note that the same peak wavelength may have a variation of, for example, about several nm. The combination of such light-emitting layers can be appropriately selected. For example, when the semiconductor laminate includes two light-emitting layers, the light-emitting layers can be selected from combinations of blue light and blue light, green light and green light, red light and red light, ultraviolet light and ultraviolet light, blue light and green light, blue light and red light, or green light and red light. The light-emitting layer may include multiple active layers having different peak wavelengths, or may include multiple active layers having the same peak wavelength.

[0033] The shape of the light emitting element 20 as viewed from above is not particularly limited. The shape of the light emitting element 20 as viewed from above may be, for example, a circle, a triangle, a rectangle, a hexagon, or an octagon. When the shape of the light emitting element 20 as viewed from above is a rectangle, a pair of outer edges of the light emitting element 20 may be parallel to the first direction (Y direction) or may be inclined with respect to the first direction (Y direction). In the first embodiment, a pair of outer edges of the light emitting element 20 are inclined at 45° with respect to the first direction (Y direction).

[0034] The first light-emitting element 21 emits light of a first peak wavelength. The wavelength at which the output value of the optical spectrum emitted from the first light-emitting element 21 is the highest is defined as the first peak wavelength. For example, the first peak wavelength is 430 nm or more and 480 nm or less. The first light-emitting element 21 of the first embodiment emits blue light. The first light-emitting element 21 of the first embodiment includes a light-transmitting substrate, which makes it easy to extract light from the side surface of the light-emitting element. The first light-emitting element 21 may emit green light, red light, or the like. The first light-emitting element 21 may also include a light-shielding substrate.

[0035] The second light-emitting element 22 emits light of a second peak wavelength different from the first peak wavelength. The wavelength at which the output value of the optical spectrum emitted from the second light-emitting element 22 is the highest is defined as the second peak wavelength. For example, the second peak wavelength is 500 nm or more and 580 nm or less. The second light-emitting element 22 of this embodiment emits green light. The second light-emitting element 22 of the first embodiment includes a light-transmitting substrate, and light can be easily extracted from the side surface of the light-emitting element. The second light-emitting element 22 may emit blue light, red light, or the like. The second light-emitting element 22 may also include a light-shielding substrate.

[0036] The third light-emitting element 23 emits light of a third peak wavelength different from the first peak wavelength and the second peak wavelength. The wavelength at which the output value of the optical spectrum emitted from the third light-emitting element 23 is the highest is set as the third peak wavelength. For example, the third peak wavelength is 600 nm or more and 780 nm or less. The third light-emitting element 23 of this embodiment emits red light. The third light-emitting element 23 of the third embodiment includes a light-shielding substrate, and it is difficult to extract light from the side surface of the light-emitting element. The third light-emitting element 23 may emit blue light or green light, etc. The third light-emitting element 23 may also include a light-transmitting substrate. For example, the first light-emitting element 21 emits blue light, the second light-emitting element 22 emits green light, and the third light-emitting element 23 emits red light, so that full-color light can be emitted from the light-emitting device 1001, and color reproducibility is easily improved. The peak wavelengths of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 may be the same.

[0037] The light emitting device may include a wavelength conversion member covering the upper surface and / or side surface of the light emitting element 20. The wavelength conversion member includes a phosphor and can convert the light from the light emitting element to an arbitrary peak wavelength. For example, when the first light emitting element 21, the second light emitting element 22, and the third light emitting element 23 emit blue light, the first wavelength conversion member covering the upper surface and / or side surface of the second light emitting element may include a green phosphor, and the second wavelength conversion member covering the upper surface and / or side surface of the third light emitting element may include a red phosphor, so that full-color light may be emitted from the light emitting device. The green phosphor included in the first wavelength conversion member converts at least a part of the blue light emitted from the second light emitting element 22 into green light. The red phosphor included in the second wavelength conversion member converts at least a part of the blue light emitted from the third light emitting element 23 into red light.

[0038] The phosphor contained in the wavelength conversion member is an yttrium-aluminum-garnet phosphor (e.g., (Y,Gd)3(Al,Ga)5O 12 :Ce), lutetium aluminum garnet phosphors (e.g., Lu3(Al,Ga)5O 12 :Ce), terbium aluminum garnet phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), CCA phosphors (e.g., Ca 10 (PO4)6Cl2:Eu), SAE phosphors (e.g., Sr4Al 14 O 25 :Eu), chlorosilicate phosphors (e.g., Ca8MgSi4O 16 Cl2:Eu), silicate phosphors (e.g., (Ba,Sr,Ca,Mg)2SiO4:Eu), β-sialon phosphors (e.g., (Si,Al)3(O,N)4:Eu) or α-sialon phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu) and other oxynitride phosphors, LSN phosphors (e.g., (La,Y)3Si6N 11:Ce), BSESN-based phosphors (e.g., (Ba,Sr)2Si5N8:Eu), SLA-based phosphors (e.g., SrLiAl3N4:Eu), CASN-based phosphors (e.g., CaAlSiN3:Eu), or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN3:Eu), etc., nitride-based phosphors, KSF-based phosphors (e.g., K2SiF6:Mn), KSAF-based phosphors (e.g., K2(Si 1-x Al x )F 6-x :Mn where x satisfies 0 < x < 1), or fluoride-based phosphors such as MGF-based phosphors (e.g., 3.5MgO·0.5MgF2·GeO2:Mn), quantum dots having a perovskite structure (e.g., (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I)3 where FA and MA represent formamidinium and methylammonium, respectively), II-VI group quantum dots (e.g., CdSe), III-V group quantum dots (e.g., InP), or quantum dots having a chalcopyrite structure (e.g., (Ag,Cu)(In,Ga)(S,Se)2), etc. can be used. As the phosphor included in the wavelength conversion member, one type of phosphor may be used, or a plurality of types of phosphors may be used.

[0039] As shown in FIG. 1, in Embodiment 1, the first light-emitting element 21 and the second light-emitting element 22 are arranged side by side in the first direction. In this specification, the first light-emitting element 21 and the second light-emitting element 22 being arranged side by side in the first direction means that at least a part of each of the first light-emitting element 21 and the second light-emitting element 22 is located on a straight line along the first direction. As shown in FIG. 1, the first light-emitting element 21 and the third light-emitting element 23 are arranged side by side in the first direction.

[0040] (Reflection member 40) The reflective member 40 is a member having reflectivity to the light from the light emitting element 20. In the first embodiment, the reflective member 40 is located in the first element recess 14A. In this specification, the reflectivity means that the reflectivity for the peak wavelength of the light emitting element is 50% or more unless otherwise specified. When the light emitting device includes a plurality of light emitting elements, the reflectivity for the peak wavelength of any light emitting element may be 50% or more. The reflective member 40 includes, for example, a base material and a light reflective substance dispersed in the base material. As the base material of the reflective member 40, a material similar to the resin material of the resin member 13 or a known material such as glass can be used. As the light reflective material of the reflective member 40, a known material such as a material similar to the light reflective material of the resin member 13 can be used.

[0041] In the first embodiment, the reflecting member 40 overlaps with the first connecting portion 31C of the light-transmitting member 30 in a top view. This makes it easier to increase the area of ​​the reflecting member 40 in a top view, and therefore makes it easier to reduce the absorption of light from the light-emitting element 20 by the support 10. This makes it easier to improve the light extraction efficiency of the light-emitting device 1001. In addition, since the reflecting member 40 overlaps with the first connecting portion 31C of the light-transmitting member 30 in a top view, the light from the first light-emitting element 21 and / or the second light-emitting element 22 reflected by the reflecting member 40 can be easily extracted to the outside of the light-emitting device 1001 from the first connecting portion 31C. This makes it easier to improve the light extraction efficiency of the light-emitting device 1001.

[0042] As shown in Fig. 1, it is preferable that the reflecting member 40 is located around the first light-emitting element 21 and overlaps with the first lens portion 31L in a top view. In this way, it is easier to reduce the absorption of light from the first light-emitting element 21 by the support 10. In the case where the first light-emitting element 21 includes a light-transmitting substrate, it is particularly preferable that the reflecting member 40 is located around the first light-emitting element 21. In this way, light traveling laterally from the side surface of the first light-emitting element 21 is more easily reflected by the reflecting member 40, so it is easier to reduce the absorption of light from the first light-emitting element 21 by the support 10.

[0043] In this specification, "the reflective member 40 is located in the vicinity of the light emitting element 20" means that the reflective member 40 is located close to the side surface of the light emitting element 20 in a top view. The reflective member 40 may or may not be in direct contact with the side surface of the first light emitting element 21. It is preferable that the reflective member 40 is in contact with the side surface of the first light emitting element 21 and / or the second light emitting element 22. In this way, it is easier to reduce absorption of light from the first light emitting element 21 and / or the second light emitting element 22 by the support 10.

[0044] In top view, the reflective member 40 may be located close to a part of the side surface of the first light-emitting element 21, or may surround the first light-emitting element 21 without any breaks. In top view, the reflective member 40 preferably surrounds the first light-emitting element 21 without any breaks. This makes it easier to reduce absorption of light from the first light-emitting element 21 by the support 10. Similarly, in top view, the reflective member 40 preferably surrounds the second light-emitting element 22 without any breaks.

[0045] At least a part of the upper surface of the first light-emitting element 21 is exposed from the reflecting member 40. It is preferable that the entire upper surface of the first light-emitting element 21 is exposed from the reflecting member 40. In this way, light from the upper surface of the first light-emitting element 21 can be easily extracted to the outside of the light-emitting device 1001.

[0046] As shown in Fig. 1, it is preferable that the reflecting member 40 is located around the second light-emitting element 22 and overlaps with the second lens portion 32L in a top view. In this way, it is easier to reduce the absorption of light from the second light-emitting element 22 by the support 10. In the case where the second light-emitting element 22 includes a light-transmitting substrate, it is particularly preferable that the reflecting member 40 is located around the second light-emitting element 22. In this way, light traveling laterally from the side surface of the second light-emitting element 22 is more easily reflected by the reflecting member 40, so it is easier to reduce the absorption of light from the second light-emitting element 22 by the support 10.

[0047] In a top view, the reflective member 40 may be located close to a part of the side surface of the second light-emitting element 22, or may surround the second light-emitting element 22 without any breaks. In a top view, the reflective member 40 preferably surrounds the second light-emitting element 22 without any breaks. In this way, it becomes easier to reduce absorption of light from the second light-emitting element 22 by the support 10.

[0048] At least a part of the upper surface of the second light-emitting element 22 is exposed from the reflecting member 40. It is preferable that the entire upper surface of the second light-emitting element 22 is exposed from the reflecting member 40. In this way, light from the upper surface of the second light-emitting element 22 is easily extracted to the outside of the light-emitting device through the first lens portion.

[0049] The reflective member located around the first light emitting element 21 and the reflective member located around the second light emitting element 22 may be separate or may be configured as one body. In the first embodiment, one reflective member 40 is located around the first light emitting element 21 and the second light emitting element 22.

[0050] (Translucent member 30) The light-transmitting member 30 is a member that is translucent to the light from the light-emitting element 20. In this specification, the term "translucent" means that the transmittance at the peak wavelength of the light-emitting element is 60% or more, unless otherwise specified. When the light-emitting device includes a plurality of light-emitting elements, the transmittance at the peak wavelength of any light-emitting element may be 60% or more. As the base material of the light-transmitting member 30, a material similar to the resin material of the resin member 13 or a known material such as glass can be used. The light-transmitting member 30 may contain a light-reflecting material to diffuse the light from the light-emitting element and reduce unevenness in the light intensity. As the light-reflecting material of the light-transmitting member 30, a known material such as a material similar to the light-reflecting material of the resin member 13 can be used.

[0051] The light-transmitting member 30 includes a base 30B and a lens portion 30L. In Fig. 2, Fig. 6, and Fig. 8, the boundary between the base 30B and the lens portion 30L is illustrated by a dashed line. In Fig. 13 described later, the boundary between the base 30B and the lens portion 30L is also illustrated by a dashed line. In the light-transmitting member 30 of the first embodiment, the base 30B and the lens portion 30L are integral. For example, the base 30B and the lens portion 30L can be integrally formed by casting molding, transfer molding, or the like. The base 30B and the lens portion 30L may be separate bodies. The base 30B covers the upper surface of the support 10. In the top view, the base 30B of the first embodiment overlaps with the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23. The lens portion 30L has a function of controlling the direction of emitted light. The lens portion 30L is located on the upper surface of the base portion 30B. The lens portion 30L has a convex shape extending upward from the base portion 30B. At least a part of the surface of the lens portion 30L preferably includes a curved surface. By having at least a part of the surface of the lens portion 30L have a convex shape including a curved surface, it becomes easier to efficiently extract light from the light-emitting element 20 to the outside of the light-transmitting member 30. In addition, a part of the surface of the lens portion 30L may be a flat surface. The shape and arrangement of the lens portion 30L may be appropriately selected in consideration of the light distribution characteristics and light extraction efficiency of the light-emitting device. In addition, the lens portion 30L may be a concave lens or a Fresnel lens.

[0052] The surface roughness of the base 30B of the light-transmitting member 30 is not particularly limited. It is preferable that the surface roughness of at least a part of the base 30B of the light-transmitting member 30 is rougher than the surface roughness of at least a part of the lens portion 30L. In this way, the external light reflected by the base 30B of the light-transmitting member 30 is easily scattered. This can reduce the strong reflection of the external light in a specific direction by the base 30B of the light-transmitting member 30.

[0053] The number of lens portions 30L included in the light-transmitting member 30 may be one or more. The lens portion 30L of the first embodiment includes a first lens portion 31L, a second lens portion 32L, and a third lens portion 33L. When viewed from above, the first lens portion 31L overlaps with the first light-emitting element 21. When the light-transmitting member 30 includes the first lens portion 31L, it becomes easier to control the distribution of light emitted from the first light-emitting element 21. When viewed from above, the second lens portion 32L overlaps with the second light-emitting element 22. When viewed from above, the third lens portion 33L overlaps with the third light-emitting element 23.

[0054] The first lens portion 31L, the second lens portion 32L, and the third lens portion 33L may be formed of the same material, or may be formed of different materials. For example, the first lens portion 31L may be colored in a similar color to the light of the first peak wavelength emitted by the first light-emitting element 21. This makes it easier to reduce the reflection by the first lens portion 31L of a part of the outside light, which is in a wavelength range far from the first peak wavelength of the first light-emitting element, when the first light-emitting element 21 is turned off, and makes it easier to reduce the absorption by the first lens portion 31L of the light from the first light-emitting element when the first light-emitting element 21 is turned on. Similarly, the second lens portion 32L may be colored in a similar color to the light of the second peak wavelength emitted by the second light-emitting element 22, and the third lens portion 33L may be colored in a similar color to the light of the third peak wavelength emitted by the third light-emitting element 23. In this specification, "similar colors" means that the hue is within a range of 3 on the hue wheel in the Munsell color system (20 hues), the brightness is within a range of 3, and the saturation is within a range of 3.

[0055] The light-transmitting member 30 of the first embodiment includes a first connecting portion 31C that connects the first lens portion 31L and the second lens portion 32L. In this specification, the first connecting portion 31C and the second connecting portion 32C described later are considered to be parts of the lens portion 30L. In this specification, the first connecting portion 31C and / or the second connecting portion 32C may be referred to as a connecting portion. In Figs. 1, 2, 4, 9, and 10, the boundary between the lens portion 30L and the connecting portion is illustrated by a broken line. In Figs. 11 and 13 described later, the boundary between the lens portion 30L and the connecting portion is also illustrated by a broken line. By including the first connecting portion 31C in the light-transmitting member 30, the surface area of ​​the light-transmitting member 30 can be easily increased. In this way, light from the first light-emitting element 21 and / or the second light-emitting element 22 can be easily extracted from the light-transmitting member 30 to the outside of the light-emitting device 1001. This makes it easier to improve the light extraction efficiency of the light-emitting device 1001. Furthermore, since the light-transmitting member 30 includes the first connecting portion 31C, the mechanical strength of the first lens portion 31L and the second lens portion 32L can be easily improved.

[0056] The light-transmitting member 30 of the first embodiment includes a second connecting portion 32C that connects the second lens portion 32L and the third lens portion 33L. By including the second connecting portion 32C in the light-transmitting member 30, the surface area of ​​the light-transmitting member 30 can be easily increased. This makes it easier for light from the second light-emitting element 22 and / or the third light-emitting element 23 to be extracted from the light-transmitting member 30 to the outside of the light-emitting device 1001. This makes it easier to improve the light extraction efficiency of the light-emitting device 1001. In addition, by including the second connecting portion 32C in the light-transmitting member 30, the mechanical strength of the second lens portion 32L and the third lens portion 33L can be easily improved.

[0057] The shapes of the first connecting portion 31C and the second connecting portion 32C in a cross-sectional view are not particularly limited. As shown in Fig. 8, the shape of the first connecting portion 31C in a cross-sectional view preferably includes a convex shape including a curved surface. This makes it easier to efficiently extract light from the first light-emitting element 21 and / or the second light-emitting element 22 to the outside of the first connecting portion 31C. Similarly, the shape of the second connecting portion 32C in a cross-sectional view preferably includes a convex shape including a curved surface.

[0058] As shown in FIG. 9, the first connecting portion first length CL1, which is the maximum length of the first connecting portion 31C in the first direction (Y direction), is preferably 0.1 times or more and 0.5 times or less than the first lens portion first length LL1, which is the maximum length of the first lens portion 31L in the first direction (Y direction). When the first connecting portion first length CL1 is 0.1 times or more than the first lens portion first length LL1, the surface area of ​​the first connecting portion 31C is easily increased. This makes it easier to improve the light extraction efficiency of the light emitting device 1001. When the first connecting portion first length CL1 is 0.5 times or less than the first lens portion first length LL1, the light emitting device is easily miniaturized in the first direction (Y direction). Similarly, the first connecting portion first length CL1 is preferably 0.1 times or more and 0.5 times or less than the maximum length of the second lens portion 32L and / or the third lens portion 33L in the first direction (Y direction). Furthermore, it is preferable that the maximum length of the second connecting portion 32C in the first direction (Y direction) is 0.1 to 0.5 times the maximum length of the first lens portion 31L, the second lens portion 32L and / or the third lens portion 33L in the first direction (Y direction).

[0059] As shown in FIG. 9, the first connecting portion second length CL2, which is the maximum length of the first connecting portion 31C in the second direction (X direction), is preferably 0.2 times or more and 0.8 times or less of the first lens portion second length LL2, which is the maximum length of the first lens portion 31L in the second direction (X direction). When the first connecting portion second length CL2 is 0.2 times or more of the first lens portion second length LL2, the surface area of ​​the first connecting portion 31C is easily increased. This makes it easier to improve the light extraction efficiency of the light emitting device 1001. When the first connecting portion second length CL2 is 0.8 times or less of the first lens portion second length LL2, the surface area of ​​the first lens portion 31L is easily increased. This makes it easier to control the light distribution of the light emitted from the first light emitting element 21 by the first lens portion 31L. Similarly, the first connecting portion second length CL2 is preferably 0.2 to 0.8 times the maximum length of the second lens portion 32L and / or the third lens portion 33L in the second direction (X direction). Moreover, the maximum length of the second connecting portion 32C in the second direction (X direction) is preferably 0.2 to 0.8 times the maximum length of the first lens portion 31L, the second lens portion 32L and / or the third lens portion 33L in the second direction (X direction).

[0060] 9, the first connecting portion second length CL2, which is the maximum length of the first connecting portion 31C in the second direction (X direction), is preferably longer than the reflecting portion first length HL1, which is the maximum length of the reflecting member 40 in the second direction (X direction). This makes it easier to increase the surface area of ​​the first connecting portion 31C of the light-transmitting member 30. This makes it easier to extract light from the first light-emitting element 21 and / or the second light-emitting element 22 from the light-transmitting member 30 to the outside of the light-emitting device 1001. Similarly, the maximum length of the second connecting portion 32C in the second direction (X direction) is preferably longer than the reflecting portion first length HL1.

[0061] The reflecting portion first length HL1 is preferably shorter than the first lens portion second length LL2. This makes it easier to reduce a decrease in the contrast ratio between when the light emitting device 1001 is turned on and when it is turned off, which is caused by reflection of external light by the reflecting member 40. Similarly, the reflecting portion first length HL1 is preferably shorter than the maximum length of the second lens portion 32L and / or the third lens portion 33L in the second direction (X direction).

[0062] As shown in FIG. 2, the first connecting portion third length CL3, which is the maximum length of the first connecting portion 31C in the vertical direction (Z direction), is preferably 0.3 times or more and 0.7 times or less of the first lens portion third length LL3, which is the maximum length of the first lens portion 31L in the vertical direction (Z direction). When the first connecting portion third length CL3 is 0.3 times or more of the first lens portion third length LL3, the surface area of ​​the first connecting portion 31C is easily increased. This makes it easier to improve the light extraction efficiency of the light emitting device 1001. When the first connecting portion third length CL3 is 0.7 times or less of the first lens portion third length LL3, the surface area of ​​the first lens portion 31L is easily increased. This makes it easier to control the light distribution of the light emitted from the first light emitting element 21 by the first lens portion 31L. Similarly, the first connecting portion third length CL3 is preferably 0.3 to 0.7 times the maximum length of the second lens portion 32L and / or the third lens portion 33L in the vertical direction (Z direction). Moreover, the maximum length of the second connecting portion 32C in the vertical direction (Z direction) is preferably 0.3 to 0.7 times the maximum length of the first lens portion 31L, the second lens portion 32L and / or the third lens portion 33L in the vertical direction (Z direction).

[0063] 1 and 9, in a top view, the outer edge of the first lens portion 31L includes a first lens first outer edge portion 31E1 located between the first light-emitting element 21 and the second light-emitting element 22, and a first lens second outer edge portion 31E2 located on the opposite side of the first lens first outer edge portion 31E1 with respect to the center of the first light-emitting element 21. In this specification, the portion located between the first light-emitting element 21 and the second light-emitting element 22 means a portion located on a plurality of straight lines connecting a part of the first light-emitting element 21 and a part of the second light-emitting element 22. In FIG. 9, the range located on a plurality of straight lines connecting a part of the first light-emitting element 21 and a part of the second light-emitting element 22 is indicated by hatching slanting upward to the right. The first lens second outer edge portion 31E2 located on the opposite side of the first lens first outer edge portion 31E1 with respect to the center of the first light-emitting element 21 means the outer edge of the first lens portion 31L located between a first virtual straight line IL1 connecting a point located on the -X direction side of a virtual line segment 31S1 point-symmetric with the first lens first outer edge portion 31E1 with respect to the center of the first light-emitting element 21 and a point located on the -X direction side of the first light-emitting element 21, and a second virtual straight line IL2 connecting a point located on the +X direction side of a virtual line segment 31S1 point-symmetric with the first lens first outer edge portion 31E1 and a point located on the +X direction side of the first light-emitting element 21. In FIG. 9, the range located on the virtual line segment 31S1 side and between the first virtual straight line IL1 and the second virtual straight line IL2 is indicated by hatching slanting upwards to the left. The center of the first light emitting element 21 is the geometric center of gravity of the first light emitting element 21 when viewed from above.

[0064] In top view, it is preferable that at least a part of the first lens first outer edge portion 31E1 overlaps with the reflecting member 40, and at least a part of the first lens second outer edge portion 31E2 is located away from the reflecting member 40. In top view, at least a part of the first lens first outer edge portion 31E1 overlaps with the reflecting member 40, which makes it easier to increase the area of ​​the reflecting member 40 in top view. In this way, it is easier to reduce the absorption of light from the first light-emitting element 21 and / or the second light-emitting element 22 by the support 10. In addition, it is easier to reduce the decrease in the contrast ratio between when the light-emitting device 1001 is turned on and when it is turned off, which is caused by reflection by the reflecting member 40, by at least a part of the first lens second outer edge portion 31E2 being located away from the reflecting member 40. In top view, it is preferable that the entire first lens first outer edge portion 31E1 overlaps with the reflecting member 40. In this way, it is easier to reduce the absorption of light from the first light-emitting element 21 and / or the second light-emitting element 22 by the support 10. In addition, in the top view, it is preferable that the entirety of first lens second outer edge portion 31E2 is located away from reflective member 40. This makes it easier to reduce a decrease in the contrast ratio between when light emitting device 1001 is turned on and when it is turned off, which is caused by reflection from reflective member 40.

[0065] For example, when a display device using the light emitting device 1001 is viewed from below, the light emitting device 1001 may be viewed from the -Y direction side. In such a case, due to refraction on the surface of the first lens portion 31L, the reflecting member 40 located on the +Y direction side may be more easily seen than the reflecting member 40 located on the -Y direction side around the first light emitting element 21. In the first embodiment, since the first lens second outer edge portion 31E2 is located away from the reflecting member 40, it is easy to make the area of ​​the reflecting member 40 located on the +Y direction side around the first light emitting element 21 smaller than the area of ​​the reflecting member 40 located on the -Y direction side. This makes it easy to reduce a decrease in the contrast ratio between when the light emitting device 1001 is turned on and when it is turned off, which is caused by reflection of external light by the reflecting member 40 located on the +Y direction side around the first light emitting element 21. In the first embodiment, in the area of ​​the reflecting member 40 overlapping with the first lens portion 31L on the top surface, the area of ​​the reflecting member 40 located on the +Y direction side with respect to the center of the first light-emitting element is smaller than the area of ​​the reflecting member 40 located on the -Y direction side. Generally, the luminous intensity of a light-emitting element emitting blue light is often lower than that of a light-emitting element emitting green light or red light. For this reason, in order to reduce the decrease in the contrast ratio between when the light is turned on and when the light is turned off, it is often required to reduce the reflection of external light, particularly around the light-emitting element emitting blue light. In the first embodiment, in the area of ​​the reflecting member 40 overlapping with the first lens portion 31L in the top view, the area of ​​the reflecting member 40 located on the +Y direction side with respect to the center of the first light-emitting element emitting blue light is smaller than the area of ​​the reflecting member 40 located on the -Y direction side. This makes it easy to reduce the decrease in the contrast ratio between when the light-emitting device 1001 is turned on and when it is turned off, which is caused by the reflection of external light by the reflecting member 40 around the first light-emitting element emitting blue light.

[0066] As shown in Figure 1, when viewed from above, the outer edge of the second lens portion 32L includes a second lens first outer edge portion 32E1 located between the first light-emitting element 21 and the second light-emitting element 22, and a second lens second outer edge portion 32E2 located on the opposite side of the second lens first outer edge portion 32E1 with respect to the center of the second light-emitting element 22.

[0067] In top view, it is preferable that at least a part of the second lens first outer edge portion 32E1 overlaps with the reflecting member 40, and at least a part of the second lens second outer edge portion 32E2 is located away from the reflecting member 40. In top view, at least a part of the second lens first outer edge portion 32E1 overlaps with the reflecting member 40, which makes it easier to increase the area of ​​the reflecting member 40 in top view. In this way, it is easier to reduce absorption of light from the first light-emitting element 21 and / or the second light-emitting element 22 by the support 10. In addition, it is easier to reduce a decrease in the contrast ratio between when the light-emitting device 1001 is turned on and when it is turned off, which is caused by reflection of external light by the reflecting member 40, by positioning at least a part of the second lens second outer edge portion 32E2 away from the reflecting member 40. In top view, it is preferable that the entire second lens first outer edge portion 32E1 overlaps with the reflecting member 40. This makes it easier to reduce absorption of light from the first light-emitting element 21 and / or the second light-emitting element 22 by the support 10. In top view, it is preferable that the entire second lens second outer edge portion 32E2 is located away from the reflective member 40. This makes it easier to reduce a decrease in the contrast ratio between when the light-emitting device 1001 is turned on and when it is turned off, which is caused by reflection of external light by the reflective member 40.

[0068] At least a part of the side surface of the first lens portion 31L including the first lens second outer edge portion 31E2 is preferably a plane perpendicular to the first direction (Y direction). In other words, at least a part of the side surface of the first lens portion 31L including the first lens second outer edge portion 31E2 is preferably a plane parallel to the second direction. This makes it easier to miniaturize the light emitting device 1001 in the first direction (Y direction). As in the light emitting device 1001A shown in FIG. 10, the side surface of the first lens portion 31L including the first lens second outer edge portion 31E2 may be a curved surface. By making the side surface of the first lens portion 31L including the first lens second outer edge portion 31E2 a curved surface, it becomes easier to efficiently extract light from the first light emitting element 21 to the outside of the light-transmitting member 30.

[0069] As shown in FIG. 1, in a top view, the outer edge of the third lens unit 33L includes a third lens first outer edge portion 33E1 located between the second light-emitting element 22 and the third light-emitting element 23, and a third lens second outer edge portion 33E2 located on the opposite side of the third lens first outer edge portion 33E1 with respect to the center of the third light-emitting element 23. At least a part of the side surface of the third lens unit 33L including the third lens second outer edge portion 33E2 is preferably a plane perpendicular to the first direction (Y direction). In this way, the light-emitting device 1001 can be easily miniaturized in the first direction (Y direction). Note that, as in the light-emitting device 1001A shown in FIG. 10, the side surface of the third lens unit 33L including the third lens second outer edge portion 33E2 may be a curved surface. Since the side surface of the third lens unit 33L including the third lens second outer edge portion 33E2 is a curved surface, it becomes easier to efficiently extract light from the third light-emitting element 23 to the outside of the light-transmissive member 30.

[0070] (Light absorbing member 50) The light absorbing member 50 is a member that has an absorptivity for the light from the light emitting element 20. In the first embodiment, the light absorbing member 50 is located in the second element recess 14B. In this specification, the absorptivity means that the absorptivity for the peak wavelength of the light emitting element is 50% or more. When the light emitting device has a plurality of light emitting elements, the absorptivity for the peak wavelength of any light emitting element may be 50% or more. The light absorbing member 50 includes, for example, a base material and a colorant dispersed in the base material. As the base material of the light absorbing member 50, a material similar to the resin material of the resin member 13 or a known material such as glass can be used. As the colorant of the light absorbing member 50, a known material such as a material similar to the colorant of the resin member 13 can be used. For example, as the light absorbing member 50, a resin material in which a glass filler colored with carbon black is added to an epoxy modified silicone resin material can be used. The colored glass filler is, for example, 1% by mass or more and 5% by mass or less, preferably 2% by mass or more and 4% by mass or less, with respect to the resin material that is the base material. The light absorbing member 50 is preferably a dark color member, and preferably has a brightness of 4.0 or less and a chroma of 4.0 or less in the Munsell color system (20 hues).

[0071] The light absorbing member 50 of the first embodiment is disposed around the third light emitting element. This makes it easier to increase the area of ​​the light absorbing member 50 in top view. This makes it easier to reduce the decrease in the contrast ratio between when the light emitting device 1001 is turned on and when it is turned off, which is caused by the reflection of external light on the surface of the support 10. In addition, in top view, the light absorbing member 50 overlaps with the third lens portion 33L. The light absorbing member 50 may or may not be in direct contact with the side surface of the third light emitting element. It is preferable that the light absorbing member 50 contacts the side surface of the third light emitting element 23. This makes it easier to reduce the decrease in the contrast ratio between when the light emitting device 1001 is turned on and when it is turned off, which is caused by the reflection of external light on the surface of the support 10.

[0072] (First covering member 60) The light emitting device 1001 further includes a first covering member 60 located between the light emitting element 20 and the light transmissive member 30 in the vertical direction (Z direction). The first covering member 60 is located in the element recess 14. The first covering member 60 is a member having light transmissibility with respect to the light from the light emitting element 20. By positioning the first covering member 60 between the light emitting element 20 and the light transmissive member 30, deterioration of the light transmissive member 30 due to the light from the light emitting element 20 can be reduced. As the base material of the first covering member 60, a known material such as a material similar to the resin material of the resin member 13 can be used. For example, an epoxy resin may be used as the material of the light transmissive member 30, and a silicone resin may be used as the material of the first covering member 60. Alternatively, a phenyl silicone resin may be used as the material of the light transmissive member 30, and a dimethyl silicone resin may be used as the material of the first covering member 60. The first covering member 60 may contain a light reflective material to reduce unevenness in the intensity of the light by diffusing the light from the light emitting element. As the light-reflective material of the first covering member 60, a known material such as the same material as the light-reflective material of the resin member 13 can be used.

[0073] In a top view, the first covering member 60 preferably overlaps with the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23. In other words, the first covering member 60 preferably covers the upper surfaces of the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23. In this manner, deterioration of the light-transmitting member 30 due to light from the first light-emitting element 21, the second light-emitting element 22, and the third light-emitting element 23 can be easily reduced.

[0074] The refractive index of the base material of the first covering member 60 is not particularly limited, but is preferably higher than the refractive index of the base material of the light-transmitting member 30. This makes it easier to reduce reflection of the light from the light-emitting element 20 at the interface between the first covering member 60 and the light-transmitting member 30, and therefore makes it easier to improve the light extraction efficiency of the light-emitting device 1001.

[0075] (Second covering member 70) The light emitting device 1001 further includes a second covering member 70 that covers one end of the wire connected to the support 10. In the first embodiment, the second covering member 70 is located in the first wire recess 15A and the second wire recess 15B. The second covering member 70 is preferably a member that is absorbent of the light from the light emitting element 20. This makes it easier to reduce a decrease in the contrast ratio between when the light emitting device 1001 is turned on and when it is turned off, which is caused by reflection of external light on the surface of the support 10. As the material of the second covering member 70, a known material such as a material similar to that of the light absorbing member 50 can be used. The second covering member 70 is preferably a dark-colored member. The second covering member 70 is preferably a member with a lightness of 4.0 or less and a chroma of 4.0 or less in the Munsell color system (20 hues).

[0076] [Embodiment 2] A light emitting device 1002 of embodiment 2 will be described with reference to Fig. 11 to Fig. 14. As shown in Fig. 11, the light emitting device 1002 of embodiment 2 differs from the light emitting device 1001 of embodiment 1 in that the support 10 has a convex portion 10C. Also, it differs from the light emitting device 1001 of embodiment 1 in that the first connecting portion 31C and the reflective member 40 are positioned apart from each other in a top view.

[0077] As shown in Fig. 12, the element recess 14 of the support 10 of the second embodiment includes a first element first recess 14A1 in which the first light emitting element 21 is located, and a second element first recess 14A2 in which the second light emitting element 22 is located. As shown in Figs. 13 and 14, the reflecting member 40 of the second embodiment includes a first reflecting member 41 located in the periphery of the first light emitting element, and a second reflecting member 42 located in the periphery of the second light emitting element away from the first reflecting member 41. The first reflecting member 41 is located in the first element first recess 14A1. The second reflecting member 42 is located in the second element first recess 14A2.

[0078] In the second embodiment, the convex portion 10C of the support 10 includes a first convex portion 10C1 and a second convex portion 10C2. As shown in FIG. 11, the first convex portion 10C1 is located between the first light-emitting element 21 and the second light-emitting element 22 in a top view. The support 10 includes the first convex portion 10C1, which makes it easier to reduce the light from the first light-emitting element 21 being extracted from the second lens portion 32L and / or the light from the second light-emitting element 22 being extracted from the first lens portion 31L. This makes it easier to increase the ratio of the light from the first light-emitting element 21 that is emitted from the first lens portion 31L to the outside of the light from the first light-emitting element 21 that is emitted to the outside of the light-transmissive member 30. This makes it easier to control the light from the first light-emitting element 21 by the first lens portion 31L. Similarly, the support 10 includes the first convex portion 10C1, which makes it easier to control the light from the second light-emitting element 22 by the second lens portion 32L.

[0079] 13, it is preferable that a part of first convex portion 10C1 overlaps with first lens portion 31L and / or second lens portion 32L in the up-down direction (Z direction). This makes it easier to reduce the extraction of light from first light-emitting element 21 through second lens portion 32L and / or the extraction of light from second light-emitting element 22 through first lens portion 31L.

[0080] As shown in FIG. 11, in a top view, the second convex portion 10C2 is located between the second light-emitting element 22 and the third light-emitting element 23. By including the second convex portion 10C2 in the support 10, it becomes easier to reduce the light from the second light-emitting element 22 being extracted from the third lens portion 33L and / or the light from the third light-emitting element 23 being extracted from the second lens portion 32L. In this way, it becomes easier to increase the ratio of the light emitted from the second lens portion 32L to the outside of the light from the second light-emitting element 22 that is emitted to the outside of the light-transmitting member 30. This makes it easier to control the light from the second light-emitting element 22 by the second lens portion 32L. Similarly, by including the second convex portion 10C2 in the support 10, it becomes easier to control the light from the third light-emitting element 23 by the third lens portion 33L.

[0081] 13, it is preferable that a part of second convex portion 10C2 overlaps with second lens portion 32L and / or third lens portion 33L in the up-down direction (Z direction). This makes it easier to reduce the extraction of light from second light-emitting element 22 through third lens portion 33L and / or the extraction of light from third light-emitting element 23 through second lens portion 32L.

[0082] The maximum length of the first convex portion 10C1 in the second direction (X direction) is preferably shorter than the first connecting portion second length, which is the maximum length of the first connecting portion 31C in the second direction (X direction). In other words, the first connecting portion second length is preferably longer than the maximum length of the first convex portion 10C1 in the second direction (X direction). This makes it easier to increase the surface area of ​​the light-transmitting member 30. This makes it easier to extract light from the first light-emitting element 21 and / or the second light-emitting element 22 from the light-transmitting member 30 to the outside of the light-emitting device 1002. Similarly, the maximum length of the second convex portion 10C2 in the second direction is preferably shorter than the second connecting portion second length CL22.

[0083] The maximum length of the first convex portion 10C1 in the second direction (X direction) is preferably longer than the maximum lengths of the first light-emitting element 21 and the second light-emitting element 22 in the second direction (X direction). This makes it easier for the first convex portion 10C1 to reduce the light from the first light-emitting element 21 being extracted through the second lens portion 32L and the light from the second light-emitting element 22 being extracted through the first lens portion 31L. Similarly, the maximum length of the second convex portion 10C2 in the second direction is preferably longer than the second light-emitting element 22 and / or the third light-emitting element 23 in the second direction (X direction).

[0084] The maximum length of first convex portion 10C1 in the second direction (X direction) is preferably longer than the maximum length of each of first reflecting member 41 and / or second reflecting member 42 in the second direction (X direction). This makes it easier for first convex portion 10C1 to reduce extraction of light from first light-emitting element 21 through second lens portion 32L and / or extraction of light from second light-emitting element 22 through first lens portion 31L. Similarly, the maximum length of second convex portion 10C2 in the second direction is preferably longer than the maximum length of second reflecting member 42 in the second direction (X direction).

[0085] The first covering member 60 of the second embodiment includes a first element covering member 61 overlapping the first light-emitting element 21, a second element covering member 62 overlapping the second light-emitting element 22, and a third element covering member 63 overlapping the third light-emitting element 23 in a top view. That is, the first covering member 60 includes the first element covering member 61 covering the upper surface of the first light-emitting element 21, the second element covering member 62 covering the upper surface of the second light-emitting element 22, and the third element covering member 63 covering the upper surface of the third light-emitting element 23. The first element covering member 61, the second element covering member 62, and the third element covering member 63 may be formed of the same material or different materials. For example, the first element covering member 61 may be colored in a similar color to the light of the first peak wavelength emitted by the first light-emitting element 21. This makes it easier to reduce reflection by the first element covering member 61 of a portion of external light in a wavelength range far from the first peak wavelength of the first light-emitting element when the first light-emitting element 21 is turned off, and makes it easier to reduce absorption of light from the first light-emitting element by the first element covering member 61 when the first light-emitting element 21 is turned on. Similarly, the second element covering member 62 may be colored in a similar color to the light of the second peak wavelength emitted by the second light-emitting element 22, and the third element covering member 63 may be colored in a similar color to the light of the third peak wavelength emitted by the third light-emitting element 23.

[0086] [Embodiment 3] A light emitting device 1003 of embodiment 3 will be described with reference to Fig. 15 and Fig. 16. As shown in Fig. 15 and Fig. 16, the light emitting device 1003 of embodiment 3 differs from the light emitting device 1001 of embodiment 1 in that the light-transmissive member 30 does not have a first connecting portion and a second connecting portion. The light emitting device 1003 of embodiment 3 has the same configuration as the light emitting device 1001 of embodiment 1, except for the light-transmissive member 30.

[0087] As shown in FIG. 15, at least a part of the side of the first lens unit 31L, including the first lens first outer edge portion 31E1 which is a part of the outer edge of the first lens unit 31L and is located between the first light-emitting element 21 and the second light-emitting element 22 in a top view, is preferably a plane perpendicular to the first direction (Y direction). By doing so, the light-emitting device 1003 can be easily miniaturized in the first direction (Y direction). Similarly, at least a part of the side of the second lens unit 32L, including the second lens first outer edge portion 32E1 which is a part of the outer edge of the second lens unit 32L and is located between the first light-emitting element 21 and the second light-emitting element 22 in a top view, is preferably a plane perpendicular to the first direction (Y direction). At least a part of the side of the second lens unit 32L, including the second lens second outer edge portion 32E2 which is a part of the outer edge of the second lens unit 32L and is located between the second light-emitting element 22 and the third light-emitting element 23 in a top view, is preferably a plane perpendicular to the first direction (Y direction). It is preferable that at least a portion of the side of the third lens portion 33L, including the third lens first outer edge portion 33E1 which is a part of the outer edge of the third lens portion 33L and is located between the second light-emitting element 22 and the third light-emitting element 23 when viewed from above, is a plane perpendicular to the first direction (Y direction).

[0088] This specification discloses a light emitting device described in the following items. [Item 1] A support; A first light emitting element and a second light emitting element aligned in a first direction and positioned on the support; a translucent member including, in a top view, a first lens portion overlapping the first light emitting element, a second lens portion overlapping the second light emitting element, and a first connecting portion connecting the first lens portion and the second lens portion; a reflective member that overlaps with the first connecting portion when viewed from above. [Item 2] 2. The light emitting device according to item 1, wherein the reflective member is located around the first light emitting element and overlaps with the first lens portion in a top view. [Item 3] 3. The light emitting device according to claim 1, wherein the reflective member is located around the second light emitting element and overlaps with the second lens portion in a top view. [Item 4] 4. The light emitting device according to claim 1, wherein a maximum length of the first connecting portion in a second direction perpendicular to the first direction is longer than a maximum length of the reflective member in the second direction. [Item 5] When viewed from above, an outer edge of the first lens includes a first lens first outer edge portion located between the first light-emitting element and the second light-emitting element, and a first lens second outer edge portion located on the opposite side of the first lens first outer edge portion with respect to a center of the first light-emitting element, 5. The light emitting device according to claim 1, wherein, in a top view, at least a portion of a first outer edge of the first lens overlaps with the reflective member, and at least a portion of a second outer edge of the first lens is located away from the reflective member. [Item 6] 6. The light emitting device according to item 5, wherein at least a part of a side surface of the first lens portion including the second outer edge portion of the first lens is a plane perpendicular to the first direction. [Item 7] When viewed from above, an outer edge of the second lens includes a second lens first outer edge portion located between the first light-emitting element and the second light-emitting element, and a second lens second outer edge portion located on the opposite side of the second lens first outer edge portion with respect to a center of the second light-emitting element, 7. The light emitting device according to claim 1, wherein, in a top view, at least a portion of a first outer edge of the second lens overlaps with the reflective member, and at least a portion of a second outer edge of the second lens is located away from the reflective member. [Item 8] a third light emitting element positioned on the support and aligned with the first light emitting element in the first direction; a light absorbing member disposed around the third light emitting element, 8. The light emitting device according to claim 1, wherein the light-transmitting member includes a third lens portion that overlaps the third light emitting element and the light absorbing member when viewed from above, and a second connecting portion that connects the second lens portion and the third lens portion. [Item 9] The first light-emitting element has an emission peak wavelength in the range of 430 nm or more and less than 480 nm, The emission peak wavelength of the second light-emitting element is in the range of 500 nm or more and less than 580 nm, 9. The light emitting device according to item 8, wherein the third light emitting element has an emission peak wavelength in the range of 600 nm or more and less than 780 nm.

[0089] The above describes the embodiments of the present invention with reference to specific examples. However, the present invention is not limited to these specific examples. All forms that can be implemented by a person skilled in the art through appropriate design modifications based on the above-described embodiments of the present invention also belong to the scope of the present invention as long as they include the gist of the present invention. In addition, within the scope of the concept of the present invention, a person skilled in the art may come up with various modified examples and examples of modifications, and these modified examples and examples of modifications also belong to the scope of the present invention. [Explanation of symbols]

[0090] 10 Support 20 Light emitting element 30 Translucent material 40 Reflective material 50 Light absorbing material 60 First covering member 70 Second covering member 1001, 1001A, 1002, 1003 Light-emitting device

Claims

1. A support; A first light emitting element and a second light emitting element aligned in a first direction and positioned on the support; a light-transmitting member including, in a top view, a first lens portion overlapping the first light-emitting element, a second lens portion overlapping the second light-emitting element, and a first connecting portion connecting the first lens portion and the second lens portion; a reflective member that overlaps with the first connecting portion when viewed from above.

2. The light emitting device according to claim 1 , wherein the reflective member is located around the first light emitting element and overlaps with the first lens portion in a top view.

3. The light emitting device according to claim 1 , wherein the reflective member is located around the second light emitting element and overlaps with the second lens portion in a top view.

4. 3 . The light emitting device according to claim 1 , wherein a maximum length of the first connecting portion in a second direction perpendicular to the first direction is longer than a maximum length of the reflective member in the second direction.

5. When viewed from above, an outer edge of the first lens includes a first lens first outer edge portion located between the first light-emitting element and the second light-emitting element, and a first lens second outer edge portion located on the opposite side of the first lens first outer edge portion with respect to a center of the first light-emitting element, 3 . The light emitting device according to claim 1 , wherein, in a top view, at least a portion of a first outer edge portion of the first lens overlaps with the reflecting member, and at least a portion of a second outer edge portion of the first lens is located away from the reflecting member.

6. The light emitting device according to claim 5 , wherein at least a part of a side surface of the first lens portion including the second outer edge portion of the first lens is a flat surface perpendicular to the first direction.

7. When viewed from above, an outer edge of the second lens includes a second lens first outer edge portion located between the first light-emitting element and the second light-emitting element, and a second lens second outer edge portion located on an opposite side of the second lens first outer edge portion with respect to a center of the second light-emitting element, 3 . The light emitting device according to claim 1 , wherein, in a top view, at least a part of a first outer edge portion of the second lens overlaps with the reflecting member, and at least a part of a second outer edge portion of the second lens is located away from the reflecting member.

8. a third light emitting element positioned on the support and aligned with the first light emitting element in the first direction; a light absorbing member disposed around the third light emitting element, 3. The light emitting device according to claim 1, wherein the light-transmitting member includes a third lens portion that overlaps the third light emitting element and the light absorbing member when viewed from above, and a second connecting portion that connects the second lens portion and the third lens portion.

9. The first light-emitting element has an emission peak wavelength in the range of 430 nm or more and less than 480 nm, The emission peak wavelength of the second light-emitting element is in the range of 500 nm or more and less than 580 nm, The light emitting device according to claim 8 , wherein the third light emitting element has an emission peak wavelength in the range of 600 nm or more and less than 780 nm.

Images