Light-emitting device, vehicular lamp, and vehicle

Abstract

Provided is a light-emitting device having a light distribution having a region of partially high luminous intensity. The light-emitting device includes: a plurality of light sources including at least a first light source and a second light source; and a coating member that holds the plurality of light sources. The first light source includes a first light-emitting element and a first light-transmissive member disposed on the first light-emitting element. The second light source includes a second light-emitting element and a second light-transmissive member disposed on the second light-emitting element. The area of the upper surface of the first light-transmissive member is smaller than the area of the upper surface of the second light-transmissive member and smaller than the area of the lower surface of the first light-transmissive member, wherein the upper surface of the first light-transmissive member is a light-emitting surface of the first light source, and the upper surface of the second light-transmissive member is a light-emitting surface of the second light source.

Description

Light-emitting device, vehicle lamp, and vehicle

[0001] The present disclosure relates to a light-emitting device, a vehicle lamp, and a vehicle.

[0002] Conventionally, light-emitting devices having light-emitting elements such as light-emitting diodes (LEDs) have been known. For example, Patent Document 1 discloses a light-emitting device having a plurality of light-emitting units and capable of controlling variable high beams, and a vehicle lamp.

[0003] JP 2018-026250 A

[0004] An object of an embodiment according to the present disclosure is to obtain a light emitting device having a light distribution that includes regions with partially high luminous intensity.

[0005] A light emitting device according to one embodiment of the present disclosure includes a plurality of light sources including at least a first light source and a second light source, and a covering member that holds the plurality of light sources, wherein the first light source includes a first light emitting element and a first translucent member arranged on the first light emitting element, and the second light source includes a second light emitting element and a second translucent member arranged on the second light emitting element, and the area of ​​the upper surface of the first translucent member, which is the light emitting surface of the first light source, is smaller than the area of ​​the upper surface of the second translucent member, which is the light emitting surface of the second light source, and is also smaller than the area of ​​the lower surface of the first translucent member.

[0006] According to the embodiment of the present disclosure, it is possible to obtain a light emitting device having a light distribution that includes regions with partially high luminous intensity.

[0007] 11. A schematic top view showing the overall configuration of the light emitting device according to the first embodiment. A schematic cross-sectional view taken along line II-II in FIG. 1. A schematic enlarged view of region III in FIG. 2. A schematic cross-sectional view showing a detailed configuration of a first light emitting element included in the light emitting device according to the first embodiment. A schematic cross-sectional view showing a detailed configuration of a second light emitting element included in the light emitting device according to the first embodiment. A schematic top view showing the configuration of a light emitting device according to a modified example. A schematic top view showing the overall configuration of a light emitting device according to a second embodiment. A schematic cross-sectional view taken along line VIII-VIII in FIG. 7. A schematic top view showing the overall configuration of a light emitting device according to a third embodiment. A schematic cross-sectional view taken along line X-X in FIG. 9. A schematic enlarged view of region XI in FIG. 9. A schematic cross-sectional view corresponding to line XII-XII in FIG. 11 of a second light-transmissive member included in the light emitting device according to the third embodiment. A schematic top view showing the light emitting surface of the light emitting device according to the fourth embodiment. A schematic top view showing the light emitting surface of the light emitting device according to the fifth embodiment. A schematic top view showing the lighting state of the light emitting device according to the fifth embodiment. A schematic cross-sectional view showing the configuration of a vehicle lamp according to a sixth embodiment. It is a schematic diagram showing the state of variable high beam illumination by the vehicle lamp according to the sixth embodiment. It is a schematic diagram showing the overall configuration of the vehicle according to the seventh embodiment. It is a schematic cross-sectional view showing a part of the light emitting device according to the eighth embodiment.

[0008] Light-emitting devices, vehicle lamps, and vehicles according to embodiments of the present disclosure will be described in detail with reference to the drawings. However, the embodiments shown below are illustrative of light-emitting devices, vehicle lamps, and vehicles embodying the technical concepts of the present disclosure, and are not limited thereto. Furthermore, unless otherwise specified, the dimensions, materials, shapes, and relative arrangements of components described in the embodiments are not intended to limit the scope of the present disclosure to those specific embodiments, and are merely illustrative examples. The size, positional relationships, etc. of components shown in each drawing may be exaggerated for clarity. In the following description, identical names and symbols indicate identical or similar components, and detailed descriptions will be omitted as appropriate. End views showing only the cut surface may be used as cross-sectional views.

[0009] In each drawing, directions are expressed using a Cartesian coordinate system having an X-axis, a Y-axis, and a Z-axis. The X-axis, the Y-axis, and the Z-axis are orthogonal to one another. The X-direction along the X-axis corresponds to a first direction in which the first light source and the second light source provided in the light-emitting device according to the embodiment are aligned. The Z-direction along the Z-axis corresponds to a normal direction to the light-emitting surface of the second light source provided in the light-emitting device according to the embodiment. The Y-direction along the Y-axis corresponds to a second direction intersecting the first direction and the normal direction. Hereinafter, the X-direction will be referred to as the first direction X. The Y-direction will be referred to as the second direction Y. The Z-direction will be referred to as the normal direction Z. The Y-direction corresponds to the vertical direction when the vehicle lamp according to the embodiment is used.

[0010] In this specification, the +Z direction is referred to as "up" or "above." The -Z direction is referred to as "down" or "below." A top view refers to a view of an object viewed from above. In this specification, "along the X-axis, Y-axis, and Z-axis" includes an object having an inclination within a range of ±20° relative to these axes. "Placing" is not limited to direct contact, but also includes placement indirectly, for example, via another member.

[0011] Furthermore, in this specification or claims, when there are multiple elements of a certain type and they are to be expressed separately, the elements may be distinguished by prefixing them with "first," "second," etc. Furthermore, the objects distinguished between the specification and the claims may differ. Therefore, even if the claims describe elements with the same prefixes as the specification, the objects identified by these elements may not coincide between the specification and the claims.

[0012] [First Embodiment] <Configuration of Light-Emitting Device According to First Embodiment> (Overall Configuration) The configuration of the light-emitting device according to the first embodiment will be described with reference to FIGS. 1 to 5. FIG. 1 is a schematic top view showing an example of the overall configuration of a light-emitting device 100 according to the first embodiment. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1. FIG. 3 is a schematic enlarged view of region III in FIG. 2. FIG. 4 is a schematic cross-sectional view showing an example of the detailed configuration of a first light-emitting element 11-1 included in the light-emitting device 100 according to the first embodiment. FIG. 4 shows a cross-section of the first light-emitting element 11-1 in a plane parallel to the YZ plane. FIG. 5 is a schematic cross-sectional view showing an example of the detailed configuration of a second light-emitting element 11-2 included in the light-emitting device 100 according to the first embodiment. FIG. 5 shows a cross-section of the second light-emitting element 11-2 in a plane parallel to the YZ plane.

[0013] The light-emitting device 100 includes a plurality of light sources 1 including at least a first light source 1-1 and a second light source 1-2, and a covering member 2 that holds the plurality of light sources 1. In the example shown in FIGS. 1 and 2, the light-emitting device 100 includes a wiring board 3 including wiring 31 electrically connected to the first light source 1-1 and the second light source 1-2, and a protective element 4 disposed on the wiring board 3 and covered by the covering member 2. The light-emitting device 100 emits light from the plurality of light sources 1 upward. The light-emitting device 100 can also individually control the on / off of each of the plurality of light sources 1. This allows the selection of an area on an irradiation surface irradiated with light from the light-emitting device 100 to be illuminated. In the following description, controlling the on / off of each of the plurality of light sources 1 is referred to as "illumination control."

[0014] The first light source 1-1 includes a first light-emitting element 11-1 and a first light-transmissive member 12-1 arranged on the first light-emitting element 11-1. The second light source 1-2 includes a second light-emitting element 11-2 and a second light-transmissive member 12-2 arranged on the second light-emitting element 11-2. The first light source 1-1 transmits light from the first light-emitting element 11-1 through the first light-transmissive member 12-1 and emits the light upward from an upper surface 121-1 of the first light-transmissive member 12-1. The second light source 1-2 transmits light from the second light-emitting element 11-2 through the second light-transmissive member 12-2 and emits the light upward from an upper surface 121-2 of the second light-transmissive member 12-2.

[0015] In this embodiment, the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1, which is the light-emitting surface of the first light source 1-1, is smaller than the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2, which is the light-emitting surface of the second light source 1-2, and is also smaller than the area of ​​the lower surface 122-1 of the first light-transmissive member 12-1. For example, in this embodiment, the first light source 1-1 and the second light source 1-2 each have a substantially square shape in a top view, as shown in FIG. 1 . The upper surface 121-1 of the first light-transmissive member 12-1, the lower surface 122-1 of the first light-transmissive member 12-1, and the upper surface 121-2 of the second light-transmissive member 12-2 each have a substantially square shape in accordance with the shapes of the light-emitting surfaces of the first light source 1-1 and the second light source 1-2. 3, the length W121-1 of one side of the square that forms the upper surface 121-1 of the first light-transmissive member 12-1 is shorter than the length W121-2 of one side of the square that forms the upper surface 121-2 of the second light-transmissive member 12-2. Therefore, the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 is smaller than the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2. Furthermore, the length W121-1 is shorter than the length W122-1 of one side of the square that forms the lower surface 122-1 of the first light-transmissive member 12-1. Therefore, the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 is smaller than the area of ​​the lower surface 122-1 of the first light-transmissive member 12-1.

[0016] Because the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1, which is the light-emitting surface of the first light source 1-1, is small, when light emitted from the light-emitting device 100 enters the lens, the light-collection efficiency of the lens for the light emitted from the first light source 1-1 is increased. The higher the light-collection efficiency, the higher the luminous intensity of the light distribution. As a result, in this embodiment, a light-emitting device 100 having a light distribution distribution with partial areas of high luminous intensity can be obtained. Furthermore, in the first light source 1-1, the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 is smaller than the area of ​​the lower surface 122-1 of the first light-transmissive member 12-1. This allows the light-emitting area of ​​light incident on the lower surface 122-1 of the first light-emitting element 11-1 to be narrowed and emitted from the upper surface 121-1. This enables the first light source to emit light with high luminous intensity. For example, the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 can be 30% to 85% of the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2. Also, the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 can be 80% to 95% of the area of ​​the lower surface 122-1 of the first light-transmissive member 12-1.

[0017] Note that each of the first light source 1-1 and the second light source 1-2 may have a shape other than a square, such as a circle or a rectangle, when viewed from above. In this case, the upper surface 121-1 of the first light-transmissive member 12-1, the lower surface 122-1 of the first light-transmissive member 12-1, and the upper surface 121-2 of the second light-transmissive member 12-2 may each have a shape corresponding to the shape of the light-emitting surface of the first light source 1-1 and the second light source 1-2. For example, if each of the first light source 1-1 and the second light source 1-2 has a substantially rectangular shape having short sides and long sides when viewed from above, the upper surface 121-1 of the first light-transmissive member 12-1, the lower surface 122-1 of the first light-transmissive member 12-1, and the upper surface 121-2 of the second light-transmissive member 12-2 each have a substantially rectangular shape corresponding to the shape of the first light source 1-1 and the second light source 1-2. The length of the long side of the upper surface 121-1 of the first light-transmissive member 12-1 is shorter than the length of the long side of the upper surface 121-2 of the second light-transmissive member 12-2, and the length of the short side of the upper surface 121-1 of the first light-transmissive member 12-1 is shorter than the length of the short side of the upper surface 121-2 of the second light-transmissive member 12-2. The area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 is smaller than the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2. The length of the long side of the upper surface 121-1 of the first light-transmissive member 12-1 is shorter than the length of the long side of the lower surface 122-1 of the first light-transmissive member 12-1, and the length of the short side of the upper surface 121-1 of the first light-transmissive member 12-1 is shorter than the length of the short side of the lower surface 122-1 of the first light-transmissive member 12-1. The area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 is smaller than the area of ​​the lower surface 122-1 of the first light-transmissive member 12-1.

[0018] The light-emitting device 100 has, as its multiple light sources, one or more first light sources 1-1 and two or more second light sources 1-2, the number of which is greater than the first light sources 1-1. The multiple light sources, including the one or more first light sources 1-1 and the two or more second light sources 1-2, are arranged in a first direction X. Here, at least one or more first light sources 1-1 are arranged inside (preferably at the center) of the row of multiple light sources arranged in the first direction X. The two or more second light sources 1-2 are arranged at the ends of the row of multiple light sources arranged in the first direction X. Preferably, the two or more second light sources 1-2 are arranged on both ends of the row of multiple light sources arranged in the first direction X, sandwiching the first light source 1-1 therebetween. This allows the first light source 1-1 to irradiate the lateral inner side (e.g., the center) of the irradiation area of ​​the light emitted from the light-emitting device 100. The second light source 1-2 irradiates the lateral end of the irradiation area of ​​the irradiation area of ​​the light emitted from the light-emitting device 100. 1 and 2, the light-emitting device 100 has eight first light sources 1-1 and eight second light sources 1-2. The eight first light sources 1-1 are arranged as one group in the center in the first direction X. The eight second light sources 1-2 are arranged as two groups of four second light sources 1-2, one on the −X side and the other on the +X side of the group of eight first light sources 1-1.

[0019] Here, for example, when the light-emitting device 100 is used as a vehicle lamp such as a headlight, high luminous intensity may be required for the light emitted from the center of the light-emitting device 100 in order to irradiate light far ahead of the vehicle with high beam distribution.

[0020] In the light-emitting device 100, by arranging the first light source 1-1 at the center in the first direction X, the luminous intensity of the light emitted from the center of the light-emitting device 100 can be increased. This makes it possible, for example, to irradiate light farther in the direction of travel of the vehicle. Furthermore, by arranging the second light sources 1-2, which have a lower luminous intensity than the first light source 1-1, at both ends in the first direction X, the luminous intensity of the light emitted from both ends of the light-emitting device 100 can be made lower than the luminous intensity of the light emitted from the center. This reduces the luminous intensity of light irradiated in a wide-angle direction relative to the direction of travel ahead of the vehicle, thereby reducing light pollution to the surrounding environment. As described above, in this embodiment, it is possible to increase the luminous intensity of the center, thereby obtaining a light-emitting device 100 having a light distribution suitable for, for example, high beams. Note that a light distribution suitable for high beams refers to a light distribution that satisfies regulations regarding the illumination area of ​​vehicle lamps. Legislation regarding the illumination area of ​​vehicle lamps is, for example, the Federal Motor Vehicle Safety Standard (FMVSS) 108 or the United Nations Regulations (UNR) 149.

[0021] In this embodiment, the upper surface 111-1 of the first light-emitting element 11-1 and the upper surface 111-2 of the second light-emitting element 11-2 each have a substantially square shape corresponding to the shapes of the light-emitting surfaces of the first light source 1-1 and the second light source 1-2. In the example shown in FIG. 3 , the length W111-1 of one side of the square constituting the upper surface 111-1 of the first light-emitting element 11-1 is shorter than the length W111-2 of one side of the square constituting the upper surface 111-2 of the second light-emitting element 11-2. Therefore, the area of ​​the upper surface 111-1 of the first light-emitting element 11-1 is smaller than the area of ​​the upper surface 111-2 of the second light-emitting element 11-2. With this configuration, the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 arranged above the first light-emitting element 11-1 can be smaller than the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2 arranged above the second light-emitting element 11-2. By reducing the light-emitting area of ​​the first light source, the brightness of the first light source can be increased. Therefore, the light emitting device 100 can obtain a light distribution having regions with partially high luminous intensity.

[0022] 3, the length W121-1 of one side of the square that forms the upper surface 121-1 of the first light-transmissive member 12-1 is shorter than the length W111-1 of one side of the square that forms the upper surface 111-1 of the first light-emitting element 11-1. Therefore, the upper surface 121-1 of the first light-transmissive member 12-1 has a smaller area than the upper surface 111-1 of the first light-emitting element 11-1. Furthermore, the length W121-2 of one side of the square that forms the upper surface 121-2 of the second light-transmissive member 12-2 is longer than the length W111-2 of one side of the square that forms the upper surface 111-2 of the second light-emitting element 11-2. Therefore, the upper surface 121-2 of the second light-transmissive member 12-2 has a larger area than the upper surface 111-2 of the second light-emitting element 11-2. This configuration makes it easy to make the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 arranged above the first light-emitting element 11-1 smaller than the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2 arranged above the second light-emitting element 11-2, thereby achieving a light distribution with high luminous intensity. Specifically, the length W111-1 of one side of the square constituting the upper surface 111-1 of the first light-emitting element 11-1 is preferably the same as or shorter than the length W122-1 of one side of the square constituting the lower surface 122-1 of the first light-transmissive member 12-1. This configuration makes it easy to cover the entire upper surface 111-1 of the first light-emitting element 11-1 with the lower surface 122-1 of the first light-transmissive member 12-1. This allows light emitted from the first light-emitting element 11-1 to be efficiently incident on the first light-transmissive member 12-1, thereby increasing the luminous intensity of the light emitted from the first light source 1-1.

[0023] 3 includes a light-guiding member 13 that covers the lower surface 122-2 of the second light-transmissive member 12-2 and the upper surface 111-2 and side surface 113-2 of the second light-emitting element 11-2. The light-guiding member 13 joins the second light-emitting element 11-2 and the second light-transmissive member 12-2 and can guide light emitted from the lower surface 122-2, the upper surface 111-2, and the side surface 113-2 to the second light-transmissive member 12-2. By including the light-guiding member 13, the second light source 1-2 can allow more of the light emitted from the second light-emitting element 11-2 to be incident on the second light-transmissive member 12-2, thereby increasing the light extraction efficiency.

[0024] The first light-transmissive member 12-1 includes an upper side surface 123-1a that is continuous with the upper surface 121-1 of the first light-transmissive member 12-1, and a lower side surface 123-1b that is continuous with the lower surface 122-1 of the first light-transmissive member 12-1. The lower side surface 123-1b is located outward of the upper side surface 123-1a in a top view, and does not face the side surface 123-2 of the adjacent second light-transmissive member 12-2. From another perspective, when viewed from the X direction, the lower side surface 123-1b does not overlap with the side surface 123-2 of the adjacent second light-transmissive member 12-2.

[0025] For example, when the first light source 1-1 is turned on and the second light source 1-2 is turned off among the adjacent first and second light sources 1-1 and 1-2, there is a concern that part of the light emitted from the first light source 1-1 will enter the adjacent second light source 1-2, pass through the second light-transmissive member 12-2 of the second light source 1-2, and be emitted upward as leaked light. If part of the light from the first light source 1-1 is emitted through the second light source 1-2 even though the second light source 1-2 is turned off, the contrast, which is defined as the ratio of the luminous intensity of the light emitted from the first light source 1-1 to the luminous intensity of the light emitted from the second light source 1-2, will decrease.

[0026] In the light-emitting device 100, the lower side surface 123-1b, which is closer to the side surface 123-2 of the adjacent second light-transmissive member 12-2 than the upper side surface 123-1a, does not face the side surface 123-2 of the second light-transmissive member 12-2. Therefore, light emitted from the lower side surface 123-1b is less likely to enter the second light-transmissive member 12-2. This reduces the amount of light emitted from the first light source 1-1 that passes through the covering member 2 and the adjacent second light source 1-2, thereby increasing contrast.

[0027] In the light-emitting device 100, the thickness of the first light-emitting element 11-1 is thinner than the thickness of the second light-emitting element 11-2. Because the thickness of the first light-emitting element 11-1 is thinner than the thickness of the second light-emitting element 11-2, the distance between the first light-emitting element 11-1 of the first light source 1-1 and the second light-transmissive member 12-2 of the second light source 1-2 adjacent to the first light source 1-1 is increased. This reduces the amount of light from the first light-emitting element 11-1 of the first light source 1-1 that enters the second light-transmissive member 12-2 of the adjacent second light source 1-2 when only the first light source 1-1 of the adjacent first and second light sources 1-1 and 1-2 is turned on. As a result, the amount of light emitted from the first light source 1-1 that passes through the adjacent second light source 1-2 is reduced, thereby increasing contrast. In the light emitting device 100, the height from the upper surface of the wiring substrate 3 to the light emitting surface of the first light source 1-1 is the same as the height from the upper surface of the wiring substrate 3 to the light emitting surface of the second light source 1-2.

[0028] Each component of the light emitting device 100 will be described in detail below.

[0029] (First Light-Emitting Element 11-1) The first light-emitting element 11-1 includes two or more stacked bodies in which a first semiconductor layer 115a, a light-emitting layer 115b, and a second semiconductor layer 115c are stacked in a thickness direction (for example, the Z direction). The first light-emitting element 11-1 shown in Fig. 4 includes a first stacked body 115-1 and a second stacked body 115-2 arranged on the first stacked body 115-1. By including two or more stacked bodies stacked in the thickness direction, the first light-emitting element 11-1 can emit light with higher luminous intensity compared to a light-emitting element having only one stacked body.

[0030] 4, the first light-emitting element 11-1 includes a light-transmitting substrate 116 arranged on the second stack 115-2, a cathode electrode 117 arranged on the opposite side of the light-transmitting substrate 116, and an anode electrode 118. The light-transmitting substrate 116 is, for example, a sapphire substrate. The first stack 115-1 and the second stack 115-2 are stacked via a tunnel junction layer or the like. Note that the first light-emitting element 11-1 does not necessarily have to include the light-transmitting substrate 116.

[0031] Each of the first stacked body 115-1 and the second stacked body 115-2 includes a first semiconductor layer 115a, a light emitting layer 115b, and a second semiconductor layer 115c. The first semiconductor layer 115a is, for example, a p-GaN layer. The second semiconductor layer 115c is, for example, an n-GaN layer. An anode electrode 118 is disposed on the first semiconductor layer 115a. A cathode electrode 117 is disposed on the second semiconductor layer 115c.

[0032] The materials for the first semiconductor layer 115a, the light emitting layer 115b, and the second semiconductor layer 115c can be selected appropriately depending on the wavelength of the emitted light. When blue or green light is emitted, ZnSe, a nitride semiconductor, or GaP can be selected as the materials for the first semiconductor layer 115a, the light emitting layer 115b, and the second semiconductor layer 115c. Examples of nitride semiconductors include In ｘ Al ｙ Ga １－ｘ－ｙ It is possible to use a semiconductor having a composition in which the composition ratios x and y are changed in the chemical formula N (0≦x≦1, 0≦y≦1, x+y≦1). When emitting red light, nitride semiconductors represented by GaAlAs and AlInGaP can be selected as the materials for the first semiconductor layer 115a, the light emitting layer 115b, and the second semiconductor layer 115c. Furthermore, semiconductor materials made of materials other than these may also be used. The composition, emission color, size, number, etc. of the first semiconductor layer 115a, the light emitting layer 115b, and the second semiconductor layer 115c can be selected appropriately depending on the purpose.

[0033] (Second Light-Emitting Element 11-2) The second light-emitting element 11-2 includes one or more stacked bodies in which a first semiconductor layer 115a, a light-emitting layer 115b, and a second semiconductor layer 115c are stacked in a thickness direction (for example, the Z direction). In the example shown in Figure 5, the second light-emitting element 11-2 has a first stacked body 115-1, a light-transmitting substrate 116 arranged on the first stacked body 115-1, a cathode electrode 117 arranged on the opposite side of the light-transmitting substrate 116, and an anode electrode 118. The configuration and materials of the first stacked body 115-1 are the same as the configuration and materials of the first stacked body 115-1 in the first light-emitting element 11-1 described above.

[0034] It is preferable that the thickness of the first light-emitting element 11-1 be smaller than the thickness of the second light-emitting element 11-2. For example, the thickness of the first light-emitting element 11-1 can be 20% to 50% of the thickness of the second light-emitting element 11-2. The thickness of the first light-emitting element 11-1 can be, for example, approximately 10 μm to 70 μm. The thickness of the second light-emitting element 11-2 can be, for example, approximately 120 μm to 180 μm. However, this is not limited to these values, and the thicknesses of the first light-emitting element 11-1 and the second light-emitting element 11-2 can be changed as appropriate.

[0035] 3 is joined to the upper surface of the first light-emitting element 11-1 using a joining member having light transparency. The first light-transmissive member 12-1 is made of a material that can transmit light emitted from the first light-emitting element 11-1 and extract the light to the outside. Furthermore, the upper surface 123-1a and the lower surface 123-1b of the first light-transmissive member 12-1 are covered with a covering member 2. If the covering member 2 has light-blocking properties, the upper surface 121-1 of the first light-transmissive member 12-1 becomes the light-emitting surface (light extraction surface) of the first light source 1-1.

[0036] The first light-transmissive member 12-1 and the second light-transmissive member 12-2 each transmit 60% or more of the light from the first light-emitting element 11-1 and the second light-emitting element 11-2 and / or light obtained by wavelength conversion of the light from the first light-emitting element 11-1 and the second light-emitting element 11-2 (for example, light having an emission peak wavelength in the wavelength range of 320 nm or more and 850 nm or less), and preferably transmit 70% or more of the light.

[0037] In the first light-transmissive member 12-1, the upper surface 123-1a and the lower surface 123-1b are planes that are approximately parallel to each other. For example, the lower surface 123-1b is a cut surface formed by cleaving when a wafer-shaped light-transmissive member is divided into individual first light-transmissive members 12-1 during the manufacturing process of the first light-transmissive member 12-1. Furthermore, for example, the upper surface 123-1a is a cut surface formed by cutting with a blade during division. Note that the upper surface 123-1a is not limited to a plane and may include a curved surface.

[0038] The second light-transmissive member 12-2 is joined to the second light-emitting element 11-2 using a light-guiding member 13 that covers a lower surface 122-2 of the second light-transmissive member 12-2, an upper surface 111-2 of the second light-emitting element 11-2, and a side surface 113-2. The second light-transmissive member 12-2 is made of a material that can transmit light emitted from the second light-emitting element 11-2 and extract the light to the outside. In addition, the side surface 123-2 of the second light-transmissive member 12-2 is covered with a covering member 2. If the covering member 2 has light-blocking properties, the upper surface 121-2 of the second light-transmissive member 12-2 becomes the light-emitting surface (light extraction surface) of the second light source 1-2.

[0039] Examples of materials constituting the first light-transmissive member 12-1 and the second light-transmissive member 12-2 include inorganic materials such as glass, ceramic, and sapphire, and organic materials such as resins or hybrid resins containing one or more of silicone resin, modified silicone resin, epoxy resin, modified epoxy resin, acrylic resin, phenolic resin, and fluororesin. The first light-transmissive member 12-1 and the second light-transmissive member 12-2 may contain a phosphor capable of wavelength conversion of at least a portion of incident light. The first light-transmissive member 12-1 and the second light-transmissive member 12-2 shown in FIG. 3 each contain a phosphor. The phosphor is a wavelength conversion substance that converts at least a portion of light incident from a light-emitting element into light of a different wavelength.

[0040] Specific examples of the first light-transmissive member 12-1 and the second light-transmissive member 12-2 containing a phosphor include those obtained by incorporating a phosphor powder into the above-mentioned materials, such as a phosphor sintered body or phosphor-containing glass. Alternatively, a light-transmissive layer, such as a resin layer containing a phosphor or a glass layer containing a phosphor, may be disposed on the surface of a molded body such as resin, glass, or ceramic. Furthermore, the first light-transmissive member 12-1 and the second light-transmissive member 12-2 may contain a filler such as a light-diffusing material depending on the purpose. When a filler such as a light-diffusing material is contained, the filler may be incorporated into resin, glass, ceramic, or other inorganic material, or a light-transmissive layer, such as a resin layer containing a filler or a glass layer containing a filler, may be disposed on the surface of a light-transmissive plate that is a molded body such as resin, glass, or ceramic.

[0041] The phosphor may be an yttrium aluminum garnet phosphor (e.g., (Y, Gd) ３ (Al, Ga) ５ O １２ :Ce), lutetium aluminum garnet phosphors (e.g., Lu ３ (Al, Ga) ５ O １２ :Ce), terbium aluminum garnet phosphors (e.g., Tb ３ (Al, Ga) ５ O １２ :Ce), CCA-based phosphors (e.g., Ca １０ (P.O. ４ ) ６ Cl ２ :Eu), SAE-based phosphors (e.g., Sr ４ Al １４ O ２５ :Eu), chlorosilicate phosphors (e.g., Ca ８ MgSi ４ O １６ Cl ２ :Eu), silicate-based phosphors (e.g., (Ba, Sr, Ca, Mg) ２ SiO ４ :Eu), β-sialon-based phosphors (e.g., (Si, Al) ３ (O, N) ４ :Eu) or α-sialon-based phosphor (e.g., Ca(Si,Al) １２ (O, N) １６ oxynitride phosphors such as (La,Y) ３ Si ６ N １１ :Ce), BSESN-based phosphors (e.g., (Ba, Sr) ２ Si ５ N ８ :Eu), SLA-based phosphors (e.g., SrLiAl ３ N ４ :Eu), CASN-based phosphors (e.g., CaAlSiN ３ :Eu) or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN ３ nitride-based phosphors such as KSF-based phosphors (e.g., K ２ SiF ６:Mn), KSAF-based phosphors (e.g., K ２ (Si １－ｘ Al ｘ ) F ６－ｘ :Mn where x satisfies 0<x<1) or MGF-based phosphor (for example, 3.5MgO.0.5MgF ２ GeO ２ Fluoride-based phosphors such as (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I) and quantum dots having a perovskite structure (e.g., (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I) ３ Here, FA and MA represent formamidinium and methylammonium, respectively.), II-VI quantum dots (e.g., CdSe), III-V quantum dots (e.g., InP), or quantum dots with a chalcopyrite structure (e.g., (Ag,Cu)(In,Ga)(S,Se) ２ ) or the like can be used. By combining these phosphors with blue light-emitting elements or ultraviolet light-emitting elements that can excite these phosphors, light-emitting devices of various colors (for example, white light-emitting devices) can be manufactured. When the light-emitting device 100 is capable of emitting white light, the white color is adjusted by adjusting the type and concentration of the phosphor contained in the first light-transmissive member 12-1 and the second light-transmissive member 12-2. The concentration of the phosphor contained in the first light-transmissive member 12-1 and the second light-transmissive member 12-2 is, for example, approximately 5% by mass or more and 50% by mass or less.

[0042] By including a phosphor in the first light-transmissive member 12-1 and the second light-transmissive member 12-2, the color of light emitted from the light-emitting element can be converted into a different color by the phosphor. This can improve the diversity of the color of light emitted from the light-emitting device 100. However, the first light-transmissive member 12-1 and the second light-transmissive member 12-2 do not necessarily include a phosphor. Alternatively, at least one of the first light-transmissive member 12-1 and the second light-transmissive member 12-2 may include a phosphor. Alternatively, the first light-transmissive member 12-1 and the second light-transmissive member 12-2 may each include a phosphor that emits light of a different color.

[0043] The first light-transmissive member 12-1 and the second light-transmissive member 12-2 preferably have high translucency for visible light. The thickness of the first light-transmissive member 12-1 may be approximately 50 μm or more and 250 μm or less. The thickness of the second light-transmissive member 12-2 may be approximately 30 μm or more and 100 μm or less. When the first light-transmissive member 12-1 has an upper surface 123-1a and a lower surface 123-1b, it is preferable that the lower surface 123-1b has a shorter length in the normal direction Z than the upper surface 123-1a. Furthermore, when the first light source 1-1 and the second light source 1-2 are arranged adjacent to each other in the first direction X, it is preferable that the lower surface 123-1b of the first light-transmissive member 12-1 and the side surface 123-2 of the second light-transmissive member 12-2 do not overlap in the normal direction Z. This reduces light propagation in the lateral direction. However, the present invention is not limited to this, and the thickness of each of the first light-transmissive member 12-1 and the second light-transmissive member 12-2 can be changed as appropriate.

[0044] Examples of light diffusing materials that can be contained in the first light-transmitting member 12-1 and the second light-transmitting member 12-2 include titanium oxide, barium titanate, aluminum oxide, silicon oxide, and yttrium aluminum perovskite (YAP).

[0045] (Coating member 2) The covering member 2 covers the respective side surfaces of the first light-emitting element 11-1, the second light-emitting element 11-2, the first light-transmissive member 12-1, and the second light-transmissive member 12-2. By sealing the first light-emitting element 11-1 and the second light-emitting element 11-2, the covering member 2 can protect the first light-emitting element 11-1 and the second light-emitting element 11-2 from external forces, dust, gas, etc. Furthermore, by sealing the first light-emitting element 11-1 and the second light-emitting element 11-2, the covering member 2 can improve the heat resistance, weather resistance, and light resistance of the first light-emitting element 11-1 and the second light-emitting element 11-2, etc.

[0046] The covering member 2 preferably has light-blocking properties. When the covering member 2 has light-reflecting properties as well as light-blocking properties, the covering member 2 reflects light emitted from the side surfaces of the first light-emitting element 11-1, the second light-emitting element 11-2, the first light-transmissive member 12-1, and the second light-transmissive member 12-2, thereby allowing the light to be emitted from the upper surface 121-1 of the first light-transmissive member 12-1 and the upper surface 121-2 of the second light-transmissive member 12-2. This can increase the light extraction efficiency of the light-emitting device 100.

[0047] When the covering member 2 has light-absorbing properties as a light-blocking property, the covering member 2 can reduce light extraction from other than the light-emitting surface by absorbing light emitted from the side surfaces of the first light-emitting element 11-1, the second light-emitting element 11-2, the first light-transmissive member 12-1, and the second light-transmissive member 12-2. This makes the difference in brightness between the light-emitting portion (the light-emitting surface of the light-emitting device 100) and the non-light-emitting portion (the upper surface of the covering member 2) clear, resulting in a light-emitting device 100 with high contrast between the light-emitting surfaces.

[0048] The covering member 2 can be made of an insulating resin, such as a thermosetting resin such as an epoxy resin or a silicone resin. Alternatively, the covering member 2 can be made of an inorganic material containing boron nitride or an alkali metal silicate. Light reflectivity can be imparted by incorporating particles of a light-reflecting material into these materials to form a white material. Examples of light-reflecting materials include titanium oxide, silicon oxide, zirconium oxide, aluminum oxide, magnesium oxide, calcium carbonate, calcium hydroxide, calcium silicate, zinc oxide, barium titanate, potassium titanate, aluminum nitride, boron nitride, mullite, and combinations thereof. Titanium oxide is particularly preferred because it is relatively stable against moisture and has a high refractive index. Light absorption can be imparted by dispersing particles of a light-absorbing material, such as carbon black, titanium black, or graphite, into the material to form a black material. Alternatively, the covering member 2 can be made gray by dispersing particles of a light-reflecting material and a light-absorbing material into the material.

[0049] The covering member 2 preferably has a light blocking property of 60% or more, and more preferably 80% or more, against the light emitted from the first light-emitting element 11-1 and the second light-emitting element 11-2. Furthermore, when viewed from above, the distance between adjacent light sources (i.e., the thickness of the covering member disposed between the light sources) can be set to 5 μm or more and 50 μm or less. The shorter the distance between adjacent light sources, the more compact the light-emitting device 100 can be. Furthermore, the longer the distance between adjacent light sources, the more lateral light propagation can be reduced.

[0050] (Wiring Board 3) The wiring board 3 is a member on which the first light-emitting element 11-1, the second light-emitting element 11-2, and the protective element 4 are mounted. The wiring board 3 includes wiring 31 for supplying power from an external source and a base material supporting the wiring. The wiring 31 is arranged on at least the upper surface of the wiring board 3 so as to form a predetermined electrical circuit. In this embodiment, a portion of the wiring 31 is exposed from the covering member 2 on the upper surface of the wiring board, and this exposed area serves as a terminal 31a for connecting to the outside. The wiring 31 includes terminals 31a that are at least one more than the total number of light-emitting elements (first light-emitting elements 11-1 and second light-emitting elements 11-2) included in the light-emitting device 100. In the example shown in FIG. 1, the light-emitting device 100 has 20 terminals 31a. The 20 terminals 31a are arranged on the upper surface of the wiring board 3 along the first direction X, similar to the respective light-emitting elements. For example, the wiring 31 can connect the respective light-emitting elements in series. The wiring 31 connecting the light-emitting elements in series has a portion exposed on the upper surface of the light-emitting device 100 as a terminal 31a for external connection. The wiring 31 is formed so that the eight first light-emitting elements 11-1 and the eight second light-emitting elements 11-2 mounted on the wiring substrate 3 can be individually driven by controlling the voltage applied to these terminals 31a. For example, the light-emitting device 100 may include multiple circuits connecting multiple light-emitting elements in series. Here, the 20 terminals 31a provided in the light-emitting device 100 form independent series circuits, each consisting of five terminals 31a. Specifically, the light-emitting device 100 includes five circuits, each including five terminals 31a connecting four light-emitting elements in series. This makes it possible, for example, to separate the circuits controlling the first light source 1-1 and the second light source 1-2, making lighting control easier.

[0051] In the light emitting device 100, the wiring substrate 3 includes wiring 31 that can supply power to the first light emitting element 11-1 and the second light emitting element 11-2 individually, and thus the first light emitting element 11-1 and the second light emitting element 11-2 can be driven to emit light individually via the wiring 31. This makes it easier to control the light emitting device 100.

[0052] The base material of the wiring board 3 is preferably an insulating material, and is preferably a material that is difficult for light emitted from the first light-emitting element 11-1 and the second light-emitting element 11-2 and external light to penetrate. It is also preferable to use a material with a certain degree of strength. Specific examples include ceramics such as aluminum oxide, aluminum nitride, silicon nitride, and mullite, and resins such as phenolic resin, epoxy resin, polyimide resin, BT resin (bismaleimide triazine resin), and polyphthalamide (PPA). The base material may also be made of a semiconductor material such as silicon or a conductive material such as metal. When a semiconductor material, metal, or other conductive material is used as the base material, the wiring 31 can be disposed on the surface of the base material via an insulating layer. Furthermore, the wiring board 3 preferably has good light reflectivity, at least in the areas near where the first light-emitting element 11-1 and the second light-emitting element 11-2 are mounted. For example, a metal layer such as Ag or Al, or a light-reflecting layer using a white resin containing a white pigment, may be provided.

[0053] The wiring 31 is provided on at least the upper surface of the wiring substrate 3. Examples of materials that can be used to form the wiring 31 include metals such as Cu, Ag, Au, Al, Pt, Ti, W, Pd, Fe, and Ni, or alloys thereof. Furthermore, for example, when using Au bumps to mount the first light-emitting element 11-1 and the second light-emitting element 11-2, using Au on the outermost surface of the wiring 31 improves the bonding strength between the first light-emitting element 11-1 and the second light-emitting element 11-2. Terminals 31a for connecting to the outside may be disposed on the lower surface of the wiring substrate 3, and in this case, the wiring 31 can include relay wiring inside and / or on the side surfaces of the device.

[0054] In addition, even when multiple light-emitting elements are implemented, the wiring 31 may be, for example, a pair of wiring patterns having two terminals 31a, with multiple light-emitting elements connected in series or parallel between the two terminals 31a.

[0055] (Protection Element 4) In this embodiment, the light emitting device 100 includes a plurality of protection elements 4, the number of which is the same as the number of light emitting elements included in the light emitting device 100. The plurality of protection elements 4 are electrically connected to positive and negative electrodes that individually drive the first light emitting element 11-1 and the second light emitting element 11-2. The protection elements 4 are, for example, Zener diodes, varistors, resistors, or capacitors. The protection elements 4 are not limited to a configuration in which one protection element 4 is provided corresponding to each of the first light emitting element 11-1 and the second light emitting element 11-2. The number of protection elements 4 included in the light emitting device 100 may be only one per circuit. Furthermore, depending on the application of the light emitting device 100, the light emitting device 100 may not include a protection element.

[0056] The light emitting device 100 includes the protective element 4, and thus can protect each of the first light emitting element 11-1 and the second light emitting element 11-2 from surge current or electrostatic discharge.

[0057] (Light-guiding member 13) The light-guiding member 13 is a member that bonds the second light-transmissive member 12-2 to the second light-emitting element 11-2. The light-guiding member 13 is light-transmissive. The light-guiding member 13 may be made of an organic adhesive such as silicone resin or epoxy resin, or an inorganic adhesive such as low-melting-point glass or polysilazane. Note that at least one of the bonding between the first light-emitting element 11-1 and the first light-transmissive member 12-1 and the bonding between the second light-emitting element 11-2 and the second light-transmissive member 12-2 may be configured to bond the members directly to each other without using the light-guiding member 13.

[0058] <Modification of Light-Emitting Device 100> Next, a light-emitting device according to a modification of the first embodiment will be described with reference to Fig. 6. Note that the same names and symbols as those in the already described embodiments indicate the same or similar components or configurations, and detailed descriptions will be omitted as appropriate. This also applies to the embodiments described below.

[0059] 6 is a schematic top view showing an example of the configuration of a light-emitting device 100a according to a modified example. In the light-emitting device 100a according to the modified example, the distance d3 between adjacent first light-transmissive members 12-1 and second light-transmissive members 12-2 in the first direction X is longer than the distance d1 between adjacent first light-transmissive members 12-1 and longer than the distance d2 between adjacent second light-transmissive members 12-2. This is the main difference between the light-emitting device 100a and the light-emitting device 100 according to the first embodiment.

[0060] For example, when one of adjacent light sources is turned on and the other is turned off, light from one light source enters the other light source and is then emitted through the other light source, which may result in a low contrast between the one light source and the other light source. In particular, when a high beam light distribution is obtained by turning on the first light source 1-1 and turning off the second light source 1-2, the low contrast between the adjacent first light source 1-1 and second light source 1-2 may prevent an appropriate high beam light distribution from being obtained.

[0061] In this modification, the distance d3 between the adjacent first and second light-transmissive members 12-1 and 12-2 is long, making it difficult for light from the first light source 1-1 to enter the adjacent second light source 1-2. This reduces the amount of light from the first light source 1-1 that passes through the adjacent second light source 1-2, thereby increasing the contrast between the adjacent first and second light sources 1-1 and 1-2. As a result, a light distribution suitable for high beams can be obtained. Note that the other effects of the light-emitting device 100a are the same as those of the light-emitting device 100 according to the first embodiment. In this way, in this modification, the distance between the light-emitting surfaces of adjacent light sources can be adjusted appropriately according to the desired light distribution.

[0062] Second Embodiment Next, a light emitting device according to a second embodiment will be described with reference to Fig. 7 and Fig. 8. Fig. 7 is a schematic top view showing an example of the overall configuration of a light emitting device 100b according to the second embodiment. Fig. 8 is a schematic cross-sectional view taken along line VIII-VIII in Fig. 7.

[0063] The light-emitting device 100b according to the second embodiment differs from the light-emitting device 100 according to the first embodiment mainly in that the multiple light sources 1 further include a third light source 1-3. The third light source 1-3 includes a third light-emitting element 11-3 and a third light-transmissive member 12-3 disposed on the third light-emitting element 11-3. The area of ​​an upper surface 121-3 of the third light-transmissive member 12-3, which is the light-emitting surface of the third light source 1-3, is smaller than the area of ​​an upper surface 121-1 of the first light-transmissive member 12-1 and is also smaller than the area of ​​a lower surface 122-3 of the third light-transmissive member 12-3.

[0064] Because the area of ​​the upper surface 121-3 of the third light-transmissive member 12-3, which is the light-emitting surface of the third light source 1-3, is small, when a light distribution is obtained using a lens using light emitted from the light-emitting device 100b, the light-collection efficiency of the lens for the light emitted from the third light source 1-3 is high. The higher the light-collection efficiency, the higher the luminous intensity of the light distribution. As a result, in this embodiment, it is possible to obtain a light-emitting device 100b having a light distribution with a higher luminous intensity in the central portion.

[0065] The light-emitting device 100b shown in Figures 7 and 8 has four first light sources 1-1, eight second light sources 1-2, and four third light sources 1-3. The four third light sources 1-3 are arranged as one group in the center in the first direction X. The four first light sources 1-1 include two groups consisting of two first light sources 1-1. The two groups are located on the -X side and +X side of the group of four third light sources 1-3, respectively. The eight second light sources 1-2 are arranged as two groups consisting of four second light sources 1-2 on the -X side and +X side of the first light source 1-1 and the third light source 1-3, respectively.

[0066] In the light-emitting device 100b, by arranging the third light source 1-3, which has a high luminous intensity, at the center in the first direction X, it is possible to increase the luminous intensity of the light emitted from the center of the light-emitting device 100b. As a result, for example, when a high-beam light distribution is obtained by turning on the third light source 1-3 and turning off the first light source 1-1 and the second light source 1-2, high-luminous-intensity light is emitted from the center of the light-emitting device 100b, making it possible to irradiate light far ahead of the vehicle. As described above, in this embodiment, it is possible to obtain a light-emitting device 100b having a light distribution suitable for high beams. Note that the effects of the light-emitting device 100b other than those described above are similar to those of the light-emitting device 100 according to the first embodiment.

[0067] [Third Embodiment] Next, a light-emitting device according to a third embodiment will be described with reference to Fig. 9 and Fig. 10. Fig. 9 is a schematic top view showing an example of the overall configuration of a light-emitting device 100c according to the third embodiment. Fig. 10 is a schematic cross-sectional view taken along line X-X in Fig. 9. Fig. 11 is a schematic enlarged view of region XI in Fig. 9. Fig. 12 is a schematic cross-sectional view, corresponding to line XII-XII in Fig. 11, of a second light-transmissive member 12-2 included in the light-emitting device 100c according to the third embodiment.

[0068] The light emitting device 100c according to the third embodiment is different from the light emitting device 100 according to the first embodiment mainly in that the length Ly2 of the upper surface 121-2 of the second light-transmissive member 12-2 is the same as the length Ly1 of the upper surface 121-1 of the first light-transmissive member 12-1 in the second direction Y. The second direction Y is a direction that intersects with both the first direction X and the normal direction Z of the upper surface 121-2 of the second light-transmissive member 12-2.

[0069] 9 and 11, the outer shape of the upper surface 121-2 of the second light-transmissive member 12-2 in top view is a rectangle with its longitudinal axis in the first direction X. The length Ly2 of the upper surface 121-2 of the second light-transmissive member 12-2 is equal to the length Ly1 of the upper surface 121-1 of the first light-transmissive member 12-1. Therefore, the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2 is larger than the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1. Note that region 12-2a in FIG. 11 represents the region of the second light-transmissive member 12-2 that is hidden from view by being covered by the covering member 2.

[0070] Here, for example, when the outer shape of each of the upper surface 121-1 of the first light-transmissive member 12-1 and the upper surface 121-2 of the second light-transmissive member 12-2 is square in top view, if the area of ​​the upper surface 121-1 of the first light-transmissive member 12-1 is made smaller than the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2, the length of the upper surface 121-1 and the length of the upper surface 121-2 will differ in the second direction Y. If the length of the upper surface 121-1 and the length of the upper surface 121-2 differ in the second direction Y, a discontinuous portion (step) corresponding to the difference in length between the upper surface 121-1 and the upper surface 121-2 will occur in the second direction Y in the distribution of light emitted from the light-emitting device.

[0071] In this embodiment, by making the length Ly1 of the upper surface 121-1 and the length Ly2 of the upper surface 121-2 the same in the second direction Y, the light emitted from the light emitting device 100c has a light distribution with a substantially uniform width in the height direction. This allows the light emitting device 100c to emit light with a light distribution suitable for headlights that does not produce steps in the height direction. Note that the effects of the light emitting device 100c other than those described above are the same as those of the light emitting device 100 according to the first embodiment.

[0072] 12, the region 12-2a is formed so as to have a shorter length in the normal direction Z than the upper surface 121-2. The region 12-2a also has a curved surface that extends from the upper surface side to the lower surface side. The curved region 12-2a can be formed, for example, by cutting with a blade. The region 12-2a may also be a flat surface parallel to the lower surface.

[0073] Fourth Embodiment Next, a light emitting device according to a fourth embodiment will be described with reference to Fig. 13. Fig. 13 is a schematic top view showing an example of the light emitting surface of a light emitting device 100d according to the fourth embodiment.

[0074] In the light emitting device 100d according to the fourth embodiment, the second translucent members 12-2 arranged on the plurality of second light emitting elements 11-2 include one second translucent member 12-2 arranged on at least two adjacent second light emitting elements 11-2. This is the main difference between the light emitting device 100 according to the first embodiment.

[0075] 13 , the light-emitting device 100d includes second light-transmissive members 12-2-1 arranged on the −X side of the eight first light sources 1-1 and second light-transmissive members 12-2-2 arranged on the +X side of the eight first light sources 1-1. Each of the second light-transmissive members 12-2-1 and 12-2-2 has a rectangular outer shape with its longitudinal axis extending in the first direction X when viewed from above. The second light-transmissive member 12-2-1 is arranged across four second light-emitting elements 11-2-1 that are aligned in the first direction X. The second light-transmissive member 12-2-2 is arranged across four second light-emitting elements 11-2-2 that are aligned in the first direction X. Each of the second light-transmissive members 12-2-1 and 12-2-2 corresponds to one second light-transmissive member 12-2 that is arranged across at least two adjacent second light-emitting elements 11-2.

[0076] In the light-emitting device 100d, the upper surface of the second light-transmissive member 12-2-1 serves as a single light-emitting surface, and the upper surface of the second light-transmissive member 12-2-2 also serves as a single light-emitting surface. Therefore, when individually controlling the lighting of multiple second light-emitting elements 11-2, it is not necessary to individually control the lighting of the four second light-emitting elements 11-2-1 arranged below the second light-transmissive member 12-2-1. Also, it is not necessary to individually control the lighting of the four second light-emitting elements 11-2-2 arranged below the second light-transmissive member 12-2-2. As described above, in the light-emitting device 100d, the number of second light-emitting elements 11-2 that need to be individually controlled is reduced, making it easier to control the lighting of multiple second light-emitting elements 11-2.

[0077] Furthermore, in the light-emitting device 100d, some of the multiple second light-emitting elements 11-2 are not individually controlled for lighting. Therefore, when controlling the distribution of light emitted from the light-emitting device 100d using a lens, it is not necessary to consider the portion of light passing through the peripheral portion of the lens that is far from the optical axis of the lens. This eliminates the need to design a complex lens shape to reduce the aberration of light passing through the peripheral portion of the lens, thereby simplifying the lens design. Furthermore, by simplifying the lens design, the lens shape can be simplified, thereby reducing the difficulty of lens manufacturing. By reducing the difficulty of lens manufacturing, lens productivity can be improved and lens costs can be reduced.

[0078] Furthermore, since it is not necessary to individually arrange a plurality of second light-transmissive members 12-2 on the plurality of second light-emitting elements 11-2, the manufacturing process of the light-emitting device 100d can be simplified, thereby improving the productivity of the light-emitting device 100d and reducing the cost of the light-emitting device 100d.

[0079] Note that the light emitting device 100d has the same effects as the light emitting device 100 according to the first embodiment other than those described above. The number of second light-transmissive members 12-2 is not limited to two and may be any number equal to or greater than one. Furthermore, the number of second light-emitting elements 11-2 arranged below one second light-transmissive member 12-2 is not limited to four and may be at least two. Furthermore, the number of second light-emitting elements 11-2 arranged below each of the multiple second light-transmissive members 12-2 may differ.

[0080] [Fifth Embodiment] Next, a light emitting device according to a fifth embodiment will be described with reference to Fig. 14 and Fig. 15. Fig. 14 is a schematic top view showing an example of the light emitting surface of a light emitting device 100e according to the fifth embodiment. Fig. 15 is a schematic top view showing an example of the lighting state of the light emitting device 100e according to the fifth embodiment.

[0081] The light emitting device 100e according to the fifth embodiment differs from the light emitting device 100 according to the first embodiment mainly in that the plurality of first light sources 1-1 are arranged in both the first direction X and the second direction Y.

[0082] 14 has 16 first light sources 1-1. In the light emitting device 100e, of the 16 first light sources 1-1, eight first light sources 1-1 are aligned in the first direction X, and two first light sources 1-1 are aligned in the second direction Y.

[0083] In the light emitting device 100e, by individually controlling the lighting of the multiple first light sources 1-1 arranged in both the first direction X and the second direction Y, it is possible to select the area to be irradiated with light within the irradiation surface in both the first direction X and the second direction Y.

[0084] 15 shows a state in which only four first light sources 1-1on, indicated by dotted hatching, are turned on out of the 16 first light sources 1-1 and eight second light sources 1-2. On the illumination surface, light is selectively and partially irradiated only onto the areas corresponding to the four first light sources 1-1on.

[0085] Note that the light emitting device 100e has the same effects as the light emitting device 100 according to the first embodiment other than those described above. The number of first light sources 1-1 included in the light emitting device 100e is not limited to 16 and may be any number. Furthermore, the number of first light sources 1-1 arranged in the first direction X and the number of first light sources 1-1 arranged in the second direction Y can each be changed as appropriate.

[0086] [Sixth Embodiment] Next, a vehicle lamp according to a sixth embodiment will be described with reference to Fig. 16 and Fig. 17. Fig. 16 is a schematic cross-sectional view showing an example of the overall configuration of a vehicle lamp 200 according to the sixth embodiment. Fig. 16 shows a cross-section of the vehicle lamp 200 including an optical axis 110C of a lens 110 provided in the vehicle lamp 200. Fig. 17 is a schematic view showing an example of variable high beam (ADB: Adaptive Driving Beam) illumination by the vehicle lamp 200 according to the sixth embodiment.

[0087] As shown in Fig. 16, the vehicle lamp 200 has a light-emitting device 100 and a lens 110 that transmits light L emitted from the light-emitting device 100. In the example shown in Fig. 16, the vehicle lamp 200 also has a control circuit 120 that can individually control the multiple light sources 1 provided in the light-emitting device 100. The vehicle lamp 200 can irradiate the light L that has transmitted through the lens 110 onto an irradiation surface S that is perpendicular to the optical axis 110C of the lens 110. For example, the vehicle lamp 200 is a headlamp of an automobile. The irradiation surface S is an imaginary plane located in front of the vehicle on which the vehicle lamp 200 is mounted.

[0088] The light L emitted from the vehicle lamp 200 has a light distribution corresponding to the plurality of light sources 1 included in the light emitting device 100. As shown in Fig. 1 above, the light emitting device 100 includes eight first light sources 1-1 and eight second light sources 1-2. Therefore, the light L irradiated onto the irradiation surface S shown in Fig. 17 includes first light L1 corresponding to the eight first light sources 1-1 and second light L2 corresponding to the eight second light sources 1-2.

[0089] The light emitting device 100 can individually control the lighting of the eight first light sources 1-1 and the eight second light sources 1-2 using the control circuit 120. In the example shown in Fig. 17, all eight first light sources 1-1 are turned on, and eight first lights L1 corresponding to the eight first light sources 1-1 are irradiated onto the irradiation surface S. Furthermore, seven of the eight second light sources 1-2 are turned on, and seven second lights L2 corresponding to the seven second light sources 1-2 are irradiated onto the irradiation surface S. The non-irradiated region B represents a region where the second light L2 is not irradiated because one of the eight second light sources 1-2 is turned off.

[0090] The light emitting device included in the vehicle lamp 200 is not limited to the light emitting device 100, but may be any one of the light emitting device 100a, the light emitting device 100b, the light emitting device 100c, the light emitting device 100d, and the light emitting device 100e.

[0091] 16 is a plano-convex single lens having a flat surface on the side where the light emitting device 100 is located and a convex surface on the side opposite the side where the light emitting device 100 is located that is convex on the side opposite the side where the light emitting device 100 is located. However, the lens 110 is not limited to a plano-convex single lens, and may be in other forms such as a plano-concave single lens, a biconvex single lens, a biconcave single lens, a meniscus single lens, a Fresnel lens, a diffractive lens, or a cylindrical lens. Furthermore, the lens 110 may be a compound lens that combines at least one of these various lenses.

[0092] The control circuit 120 is electrically connected to each of the multiple light sources 1. The control circuit 120 includes a processor, an electronic circuit, a memory, and the like. The processor is a CPU (Central Processing Unit), etc. The electronic circuit is an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array), etc. The memory is a ROM (Read Only Memory), a RAM (Random Access Memory), an HDD (Hard Disk Drive), an SSD (Solid State Drive), etc.

[0093] In this embodiment, by including the light-emitting device 100, it is possible to provide a vehicle lamp 200 that can realize a function suitable for an adjustable light distribution headlamp (ADB) that controls light distribution according to the surrounding environment. Furthermore, by including the control circuit 120, the vehicle lamp 200 can realize the ADB function. By using the ADB function, the vehicle lamp 200 can reduce glare that is caused to drivers of vehicles ahead of or oncoming from the vehicle on which the vehicle lamp 200 is installed.

[0094] [Seventh embodiment] Next, a vehicle according to a seventh embodiment will be described with reference to Fig. 18. Fig. 18 is a schematic diagram showing an example of the overall configuration of a vehicle 500 according to the seventh embodiment. Fig. 18 shows the vehicle 500 as viewed from above in the direction of gravity.

[0095] The vehicle 500 according to the seventh embodiment includes a vehicle lamp 200. In the example shown in FIG.

[0096] The vehicle 500 is provided with one vehicular lamp 200 at the right front portion of the vehicle 500 and one at the left front portion of the vehicle 500. The vehicular lamp 200 provided at the right front portion of the vehicle 500 emits light with a light distribution DR. The vehicular lamp 200 provided at the left front portion of the vehicle 500 emits light with a light distribution DL. The two vehicular lamps 200 may be the same and be provided in the same direction on the vehicle 500, or may be provided in reversed directions on the vehicle 500. When provided in the same direction, the light distributions DR and DL are the same. When provided in reversed directions, the light distributions DR and DL are reversed left and right. The vehicular lamps 200 provided at the left front portion of the vehicle 500 may have the same structure or may be symmetrical structures. The vehicle 500 may also have one vehicle lamp 200 on either the right front or the left front of the vehicle 500 .

[0097] The sensor 600 outputs information about the external environment as an output signal Sg. The sensor 600 is, for example, a camera that outputs an output signal Sg corresponding to a captured image of the periphery of the vehicle 500. Alternatively, the sensor 600 may be a GPS sensor that outputs position information such as GPS (Global Positioning System) from a GNSS (Global Navigation Satellite System) as the output signal Sg. Furthermore, the sensor 600 may be a speedometer that measures the traveling speed of the vehicle 500 and outputs information about the traveling speed as the output signal Sg. Note that the traveling speed of the vehicle 500 includes the relative speed with respect to vehicles other than the vehicle 500. The traveling speed of the vehicle 500 corresponds to the output signal Sg from the viewpoint of the relative speed with respect to roads outside the vehicle 500 and vehicles other than the vehicle 500. The sensor 600 may also output information related to information other than the above as the output signal Sg. The output signal Sg is input to a control circuit 120 provided in the vehicle lamp 200 .

[0098] The vehicle 500 according to this embodiment can achieve the ADB function by controlling the lighting of the light-emitting device 100 using the control circuit 120 based on the output signal Sg from the sensor 600. The ADB function enables the vehicle 500 to prevent glare from being caused to the driver of a vehicle ahead of the vehicle 500 or an oncoming vehicle.

[0099] Eighth Embodiment Fig. 19 is a schematic cross-sectional view showing a part of a light emitting device 100f according to an eighth embodiment, and is a schematic enlarged view of a region of the light emitting device 100f corresponding to region III in Fig. 2.

[0100] The light-emitting device 100f includes a plurality of light sources 1 including at least a first light source 1-1 and a second light source 1-2, and a covering member 2 that holds the plurality of light sources 1. The first light source 1-1 includes a first light-emitting element 11-1 and a first light-transmissive member 12-1 disposed on the first light-emitting element 11-1. The second light source 1-2 includes a second light-emitting element 11-2 and a second light-transmissive member 12-2 disposed on the second light-emitting element 11-2. The area of ​​the upper surface 121-1 of the first light-transmissive member 12-1, which is the light-emitting surface of the first light source 1-1, is smaller than the area of ​​the upper surface 121-2 of the second light-transmissive member 12-2, which is the light-emitting surface of the second light source 1-2. In the first light source 1-1, a side surface 123-1 of the first light-transmissive member 12-1 and a side surface 112-1 of the first light-emitting element 11-1 are located on the same plane. In the second light source 1-2, the side surface 123-2 of the second light-transmissive member 12-2 is positioned outside the side surface of the second light-emitting element 11-2.

[0101] In the light-emitting device 100f, the side surface 123-1 of the first translucent member 12-1 and the side surface 112-1 of the first light-emitting element 11-1 are located on the same plane, so the distance between adjacent first light sources 1-1 can be reduced. This allows the light-emitting device 100f to be made more compact. Furthermore, because the outer edge of the upper surface 111-1 of the first light-emitting element 11-1 and the outer edge of the lower surface 122-1 of the first translucent member 12-1 coincide with each other, color unevenness in the light emitted from the upper surface of the first light source 1-1 can be reduced.

[0102] 19, the first light-emitting element 11-1 includes two or more stacked bodies in which a first semiconductor layer 115a, a light-emitting layer 115b, and a second semiconductor layer 115c are stacked in the thickness direction. For example, as shown in the above-mentioned FIG. 4, the first light-emitting element 11-1 includes two stacked bodies, a first stacked body 115-1 and a second stacked body 115-2. In the light-emitting device 100f, the first light-emitting element 11-1 includes two or more stacked bodies stacked in the thickness direction, and thereby can emit light with higher luminous intensity compared to a light-emitting element having only one stacked body.

[0103] In the example shown in Figure 19, the thickness of the first light-emitting element 11-1 is thinner than the thickness of the second light-emitting element 11-2. This increases the distance between the first light-emitting element 11-1 of the first light source 1-1 and the second light-transmissive member 12-2 of the second light source 1-2 adjacent to the first light source 1-1. When only the first light source 1-1 of the adjacent first and second light sources 1-1 and 1-2 is turned on, it is possible to reduce the amount of light from the first light-emitting element 11-1 of the first light source 1-1 entering the second light-transmissive member 12-2 of the adjacent second light source 1-2. As a result, it is possible to reduce the amount of light emitted from the first light source 1-1 that passes through the adjacent second light source 1-2, thereby increasing contrast.

[0104] Although the preferred embodiments have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

[0105] All ordinal numbers, quantitative numbers, and other figures used in the description of the embodiments are provided as examples to specifically explain the technology of the present disclosure, and the present disclosure is not limited to the illustrated figures. Furthermore, the connection relationships between components are provided as examples to specifically explain the technology of the present disclosure, and do not limit the connection relationships that realize the functions of the present disclosure.

[0106] The light-emitting device and vehicle lamp of the present disclosure have a light distribution with partially high luminous intensity, and therefore can be suitably used for mounting on vehicles such as automobiles. In particular, the light-emitting device and vehicle lamp of the present disclosure can be suitably used as a lamp for automobiles.

[0107] Although the light-emitting device and vehicle lamp of the present disclosure have been described as being used as a headlight in the embodiments, the present disclosure is not limited thereto. For example, the light-emitting device and vehicle lamp can be used for various purposes, such as a communication lamp or a daytime running lamp. Furthermore, the light-emitting device and vehicle lamp of the present disclosure are not limited to being used in automobiles. The light-emitting device and vehicle lamp of the present disclosure may also be used as a lamp for an aircraft such as a helicopter or a drone, for example, without being limited to a vehicle lamp.

[0108] Aspects of the present disclosure are as follows, for example. <Item 1> A light emitting device including a plurality of light sources including at least a first light source and a second light source, and a covering member that holds the plurality of light sources, wherein the first light source includes a first light emitting element and a first translucent member arranged on the first light emitting element, and the second light source includes a second light emitting element and a second translucent member arranged on the second light emitting element, and an area of ​​an upper surface of the first translucent member that is a light emitting surface of the first light source is smaller than an area of ​​an upper surface of the second translucent member that is a light emitting surface of the second light source and is smaller than an area of ​​a lower surface of the first translucent member. <Item 2> The light emitting device according to <Item 1>, including one or more first light sources and two or more second light sources that are greater than the first light sources, wherein the first light source and the second light sources are aligned in a first direction, and the one or more first light sources are centrally located in the first direction. <Item 3> The light emitting device according to <Item 1> or <Item 2>, wherein an area of ​​an upper surface of the first light emitting element is smaller than an area of ​​an upper surface of the second light emitting element. <Item 4> The light emitting device according to any one of <Item 1> to <Item 3>, wherein an area of ​​an upper surface of the first light-transmissive member is smaller than an area of ​​an upper surface of the first light emitting element, and an area of ​​an upper surface of the second light-transmissive member is larger than an area of ​​an upper surface of the second light emitting element. <Item 5> The light emitting device according to any one of <Item 1> to <Item 4>, wherein the first light emitting element includes two or more stacked bodies in which a first semiconductor layer, a light emitting layer, and a second semiconductor layer are stacked in the thickness direction. <Item 6> The light emitting device according to any one of <Item 1> to <Item 5>, further including a light guiding member covering a lower surface of the second light-transmissive member and an upper surface and side surfaces of the second light emitting element. <Item 7> The light emitting device according to any one of <Item 1> to <Item 6>, wherein the first translucent member includes an upper side surface continuous with an upper surface of the first translucent member and a lower side surface continuous with a lower surface of the first translucent member, the lower side surface being located outward of the upper side surface in a top view and not facing a side surface of the adjacent second translucent member. <Item 8> The light emitting device according to any one of <Item 1> to <Item 7>, wherein at least one of the first translucent member and the second translucent member includes a phosphor.<Item 9> The light emitting device according to any one of <Item 1> to <Item 8>, including a wiring substrate including wiring electrically connected to the first light emitting element and the second light emitting element. <Item 10> The light emitting device according to any one of <Item 1> to <Item 9>, including a protective element electrically connected to at least one of the first light emitting element and the second light emitting element. <Item 11> The light emitting device according to any one of <Item 1> to <Item 10>, wherein a thickness of the first light emitting element is thinner than a thickness of the second light emitting element. <Item 12> The light emitting device according to any one of <Item 1> to <Item 11>, including a plurality of the second light sources, wherein the second translucent member disposed over the plurality of second light emitting elements includes one second translucent member disposed over at least two adjacent second light emitting elements. <Item 13> The light emitting device according to any one of <Item 1> to <Item 12>, wherein the first light source and the second light source are aligned in a first direction, and in a second direction intersecting both the first direction and the normal direction to the upper surface of the second translucent member, the length of the upper surface of the second translucent member is the same as the length of the upper surface of the first translucent member. <Item 14> The light emitting device according to any one of <Item 1> to <Item 13>, wherein the light emitting device includes a plurality of the first light sources, the plurality of first light sources being aligned in the first direction and in a second direction intersecting both the first direction and the normal direction to the upper surface of the second translucent member. <Item 15> A vehicular lamp including the light emitting device according to any one of <Item 1> to <Item 14> and a lens that transmits light emitted from the light emitting device. <Item 16> The vehicular lamp according to <Item 15>, further including a control circuit capable of individually controlling the plurality of light sources. <Item 17> A vehicle having the vehicle lamp according to <Item 15> or <Item 16>.

[0109] This application claims priority based on Japanese Patent Application No. 2024-067320 filed with the Japan Patent Office on April 18, 2024, and includes the entire contents of this Japanese patent application.

[0110] 1 Light source 1-1 First light source 11-1 First light-emitting element 111-1 Upper surface of first light-emitting element 12-1 First translucent member 121-1 Upper surface of first translucent member 122-1 Lower surface of first translucent member 123-1a Upper side of first translucent member 123-1b Lower side of first translucent member 1-2 Second light source 11-2 Second light-emitting element 111-2 Upper surface of second light-emitting element 111-3 Side of second light-emitting element 12-2 Second translucent member 12-2a Region 121-2 Upper surface of second translucent member 122-2 Lower surface of second translucent member 123-2 Side of second translucent member 1-3 Third light source 11-3 Third light-emitting element 12-3 Third translucent member 121-3 Upper surface of third translucent member 122-3 1. Lower surface of third light-transmissive member 115-1 First stacked body 115-2 Second stacked body 115a First semiconductor layer 115b Light-emitting layer 115c Second semiconductor layer 116 Light-transmissive substrate 117 Cathode electrode 118 Anode electrode 13 Light-guiding member 2 Covering member 3 Wiring substrate 31 Wiring 31a Terminal 4 Protective element 100, 100a, 100b, 100c, 100d, 100e Light-emitting device 110 Lens 110C Optical axis 120 Control circuit 200 Vehicle lamp 500 Vehicle 600 Sensor B Non-illuminated area d1, d2, d3 Distance DL, DR Light distribution Ly1, Ly2 Length L Light L1 First light L2 Second light S Illuminated surface Sg Output signal X First direction Y Second direction Z Normal direction W111-1, W121-1, W122-1, W111-2, W121-2 Length

Claims

1. A light emitting device comprising: a plurality of light sources including at least a first light source and a second light source; and a covering member that holds the plurality of light sources; wherein the first light source includes a first light emitting element and a first translucent member that is arranged on the first light emitting element; and the second light source includes a second light emitting element and a second translucent member that is arranged on the second light emitting element; and wherein the area of ​​the upper surface of the first translucent member, which is the light emitting surface of the first light source, is smaller than the area of ​​the upper surface of the second translucent member, which is the light emitting surface of the second light source, and is also smaller than the area of ​​the lower surface of the first translucent member.

2. The light emitting device according to claim 1, comprising one or more of the first light sources and two or more of the second light sources, the number of which is greater than the first light sources, the first light sources and the second light sources being aligned in a first direction, and the one or more of the first light sources being centrally located in the first direction.

3. The light emitting device according to claim 1 or 2, wherein the area of ​​the top surface of the first light emitting element is smaller than the area of ​​the top surface of the second light emitting element.

4. A light-emitting device according to any one of claims 1 to 3, wherein the upper surface of the first translucent member has an area smaller than that of the upper surface of the first light-emitting element, and the upper surface of the second translucent member has an area larger than that of the upper surface of the second light-emitting element.

5. A light-emitting device according to any one of claims 1 to 4, wherein the first light-emitting element includes two or more stacked bodies in which a first semiconductor layer, a light-emitting layer, and a second semiconductor layer are stacked in the thickness direction.

6. A light emitting device according to any one of claims 1 to 5, further comprising a light guide member covering the lower surface of said second light transmissive member and the upper and side surfaces of said second light emitting element.

7. A light-emitting device according to any one of claims 1 to 6, wherein the first translucent member includes an upper side surface continuous with the upper surface of the first translucent member and a lower side surface continuous with the lower surface of the first translucent member, and the lower side surface is located outward of the upper side surface in a top view and does not face a side surface of the adjacent second translucent member.

8. The light emitting device according to any one of claims 1 to 7, wherein at least one of the first light-transmissive member and the second light-transmissive member contains a phosphor.

9. A light emitting device according to any one of claims 1 to 8, further comprising a wiring substrate including wiring electrically connecting the first light emitting element and the second light emitting element.

10. The light emitting device according to any one of claims 1 to 9, further comprising a protective element electrically connected to at least one of the first light emitting element and the second light emitting element.

11. The light emitting device according to any one of claims 1 to 10, wherein the thickness of the first light emitting element is thinner than the thickness of the second light emitting element.

12. A light emitting device according to any one of claims 1 to 11, having a plurality of said second light sources, and wherein said second translucent members arranged over said plurality of second light emitting elements include one said second translucent member arranged over at least two adjacent said second light emitting elements.

13. A light emitting device according to any one of claims 1 to 12, wherein the first light source and the second light source are aligned in a first direction, and in a second direction intersecting both the first direction and the normal direction of the upper surface of the second translucent member, the length of the upper surface of the second translucent member is the same as the length of the upper surface of the first translucent member.

14. A light emitting device according to any one of claims 1 to 13, comprising a plurality of the first light sources, the plurality of first light sources being aligned in a first direction and also aligned in a second direction intersecting both the first direction and the normal direction of the upper surface of the second translucent member.

15. A vehicle lamp comprising: a light-emitting device according to any one of claims 1 to 14; and a lens that transmits light emitted from the light-emitting device.

16. A vehicle lamp according to claim 15, further comprising a control circuit capable of individually controlling the plurality of light sources.

17. A vehicle comprising the vehicle lamp according to claim 15 or 16.

18. A light emitting device comprising: a plurality of light sources including at least a first light source and a second light source; and a covering member that holds the plurality of light sources; wherein the first light source includes a first light emitting element and a first translucent member arranged on the first light emitting element; the second light source includes a second light emitting element and a second translucent member arranged on the second light emitting element; the area of ​​the top surface of the first translucent member, which is the light emitting surface of the first light source, is smaller than the area of ​​the top surface of the second translucent member, which is the light emitting surface of the second light source; in the first light source, side surfaces of the first translucent member and side surfaces of the first light emitting element are located on the same plane; and in the second light source, the side surfaces of the second translucent member are located outside the side surfaces of the second light emitting element.

19. The light emitting device according to claim 18, wherein the first light emitting element includes two or more stacked bodies in which a first semiconductor layer, a light emitting layer, and a second semiconductor layer are stacked in the thickness direction.

20. The light emitting device according to claim 18 or 19, wherein the thickness of the first light emitting element is thinner than the thickness of the second light emitting element.

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