Light-emitting device

Abstract

To reduce color difference when driven by a plurality of circuits on a light-emitting device having a plurality of light-emitting elements.SOLUTION: The light-emitting device includes a substrate, a first frame part arranged on the upper surface of the substrate, a second frame part arranged on the upper surface of the substrate on the inner side of the inner edge of the first frame part, a first light-emitting element arranged on the upper surface of the substrate between the inner edge of the first frame part and the outer edge of the second frame part, a second light-emitting element arranged on the upper surface of the substrate on the inner side of the inner edge of the second frame part, a first wavelength conversion member arranged in a region surrounded by the first frame part on the upper surface of the substrate for coating the second frame part, first light-emitting element, and second light-emitting element, and a circuit including a first drive circuit for driving the first light-emitting element and a second drive circuit for driving the second light-emitting element. The first wavelength conversion member has a phosphor-containing part in which phosphor particles are unevenly distributed on the substrate side. The height of the second frame part is less than the thickness of the phosphor-containing part.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a light-emitting device.

Background Art

[0002] There is known a light-emitting device having a first frame portion provided on a substrate, a second frame portion provided on the substrate and surrounding the first frame portion, at least one first light-emitting element provided inside the first frame portion on the substrate, and a plurality of second light-emitting elements provided between the first frame portion and the second frame portion on the substrate.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of the present disclosure is to reduce a chromaticity difference when driving a light-emitting device having a plurality of light-emitting elements with a plurality of circuits.

Means for Solving the Problems

[0005] A light-emitting device according to an embodiment of the present disclosure includes a substrate, a first frame portion disposed on the upper surface of the substrate, a second frame portion disposed inside the inner edge of the first frame portion on the upper surface of the substrate, a first light-emitting element disposed between the inner edge of the first frame portion and the outer edge of the second frame portion on the upper surface of the substrate, a second light-emitting element disposed inside the inner edge of the second frame portion on the upper surface of the substrate, a first wavelength conversion member disposed in a region surrounded by the first frame portion on the upper surface of the substrate and covering the second frame portion, the first light-emitting element, and the second light-emitting element, a first drive circuit for driving the first light-emitting element, and a second drive circuit for driving the second light-emitting element. The first wavelength conversion member has a phosphor-containing portion in which phosphor particles are unevenly distributed on the substrate side, and the height of the second frame portion is less than the thickness of the phosphor-containing portion.

Advantages of the Invention

[0006] According to an embodiment of the present disclosure, it is possible to reduce the chromaticity difference when driving with a plurality of circuits in a light-emitting device having a plurality of light-emitting elements.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

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Figure 6

Figure 7

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Figure 10

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Figure 12

Figure 13

Embodiments for Carrying Out the Invention

[0008] Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In the following description, terms indicating a specific direction or position (for example, "up", "down", and other terms including those terms) are used as necessary. However, the use of those terms is for facilitating the understanding of the invention with reference to the drawings, and the technical scope of the present invention is not limited by the meanings of those terms. Also, parts denoted by the same reference numerals in a plurality of drawings indicate the same or equivalent parts or members.

[0009] In addition, the embodiments described below illustrate a light-emitting device or the like for embodying the technical idea of the present invention, and do not limit the present invention thereto. Further, the dimensions, materials, shapes, relative arrangements, etc. of the components described below are not intended to limit the scope of the present invention only thereto, but are intended to be illustrative, unless otherwise specifically described. In addition, the content described in one embodiment is also applicable to other embodiments and modifications. Also, the sizes and positional relationships of the members shown in the drawings may be exaggerated for clarity of explanation. Furthermore, in order to avoid excessive complexity of the drawings, schematic diagrams in which the illustration of some elements is omitted or end views showing only the cut surface as a cross-sectional view may be used. In addition, in this specification, "rectangle" means that a variation of ±5 degrees is allowed for the angles of the four corners, and includes shapes approximating these rectangles, such as chamfered or rounded corners of the rectangle.

[0010] <First Embodiment> FIG. 1 is a perspective view illustrating a light-emitting device according to the first embodiment. FIG. 2 is a perspective view of the light-emitting device shown in FIG. 1 with the first wavelength conversion member removed. FIG. 3 is a partial plan view illustrating the first frame portion and the inside thereof of the light-emitting device shown in FIG. 2. FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. 3. FIG. 5 is a cross-sectional view taken along line V-V in FIG. 3. FIG. 6 is a circuit diagram of the light-emitting device according to the first embodiment. Note that in FIGS. 4 and 5, the first wavelength conversion member that was not shown in FIG. 3 is shown.

[0011] The light-emitting device according to the first embodiment includes a substrate, a first frame portion, a second frame portion, one or more first light-emitting elements, one or more second light-emitting elements, a first wavelength conversion member, and a circuit. The light-emitting device according to the first embodiment can be used, for example, in lighting devices such as stop lamps and / or tail lamps of automobiles, motorcycles, etc.

[0012] The light-emitting device 1 illustrated in FIGS. 1 to 6 includes a substrate 10, a first frame portion 21, a second frame portion 22, first light-emitting elements 30a to 30d, second light-emitting elements 40a and 40b, a first wavelength conversion member 61, and a circuit 70. When there is no particular need for distinction, the first light-emitting elements 30a to 30d may be collectively referred to as the first light-emitting element 30, and the second light-emitting elements 40a and 40b may be collectively referred to as the second light-emitting element 40.

[0013] As shown in FIGS. 1 and 2, the substrate 10 is, for example, rectangular in plan view. On the upper surface 10a of the substrate 10, a first frame portion 21, a second frame portion 22, a first light-emitting element 30, a second light-emitting element 40, a first wavelength conversion member 61, and a circuit 70 are arranged. The circuit 70 has, for example, a plurality of electronic components that are rectangular in plan view.

[0014] In the example of FIGS. 1 to 5, the first frame portion 21 is rectangular in plan view. By doing so, it is possible to easily arrange a plurality of electronic components that are rectangular in plan view along the outer edge of the first frame portion 21 on the upper surface 10a of the substrate 10. Note that the first frame portion 21 may be circular or elliptical in plan view.

[0015] The second frame portion 22 is arranged inside the inner edge of the first frame portion 21 on the upper surface 10a of the substrate 10. In the example of FIGS. 1 to 5, the second frame portion 22 is rectangular in plan view. When the second frame portion 22 is rectangular in plan view, the second frame portion 22 may be a rectangle similar to the first frame portion 21 or a non-similar rectangle. In plan view, it is preferable that the centers of the first frame portion 21 and the second frame portion 22 overlap. Thereby, it becomes easy to arrange the first light-emitting element 30 and the second light-emitting element 40 such that their light-emitting centers are at the same position.

[0016] The first light-emitting element 30 is arranged between the inner edge of the first frame portion 21 and the outer edge of the second frame portion on the upper surface 10a of the substrate 10. The first light-emitting elements 30a to 30d can each be, for example, substantially the same size and rectangular in plan view. For example, the plan view shape of the first light-emitting elements 30a to 30d is a square with a side length of about 1 mm. In the light-emitting device 1, the first light-emitting elements 30a to 30d are connected in series with each other, for example.

[0017] When the light-emitting device 1 includes a plurality of first light-emitting elements 30 having a rectangular shape in plan view and the first frame portion 21 is rectangular in plan view, it is preferable that the plurality of first light-emitting elements 30 are arranged at the corner portions of the rectangle. The length of each side constituting the rectangular first frame portion 21 can be about 3 mm or more and 8 mm or less, although it also depends on the size of the desired light-emitting surface. When the light-emitting device 1 includes four first light-emitting elements 30a to 30d, as shown in FIG. 3, it is preferable that the first light-emitting elements 30a to 30d are respectively arranged at the corner portions of the rectangle of the first frame portion 21. By doing so, it is possible to easily arrange the four first light-emitting elements 30a to 30d in a small space inside the rectangular first frame portion 21. Note that arranging the first light-emitting element 30 at the corner portion of the rectangle means that one rectangular first light-emitting element 30a to 30d is arranged in each of the four rectangular regions obtained by dividing the rectangle into two rows and two columns in plan view. At this time, it is preferable that two sides constituting the inner edge of the rectangular first frame portion 21 in plan view and two sides of the first light-emitting element 30 facing the inner edge are substantially parallel to each other.

[0018] When the light-emitting device 1 includes a plurality of first light-emitting elements 30 and the first frame portion 21 is rectangular in plan view, it is preferable that the plurality of first light-emitting elements 30 are arranged so as to form a rectangle as a whole in plan view. By doing so, it is possible to easily arrange the plurality of first light-emitting elements 30 (first light-emitting elements 30a to 30d) in a small space inside the rectangular first frame portion 21.

[0019] For example, the first light-emitting elements 30 can be arranged in a matrix so as to have a rectangular shape similar to the rectangular region surrounded by the first frame portion 21 as a whole. In the example of FIG. 3, the rectangular first light-emitting elements 30a to 30d in plan view are arranged in two rows and two columns so as to form a rectangle E as a whole in plan view.

[0020] The second light-emitting element 40 is disposed inside the inner edge of the second frame portion 22 on the upper surface 10a of the substrate 10. That is, the second light-emitting element 40 is disposed more inward than the first light-emitting element 30 on the upper surface of the substrate 10. The second light-emitting elements 40a and 40b can each be, for example, substantially the same size and rectangular in plan view. In plan view, the area of one second light-emitting element 40 is preferably smaller than the area of one first light-emitting element 30. Thereby, it is possible to easily arrange the second light-emitting element 40 in a small space inside the inner edge of the second frame portion 22. For example, the plan-view shapes of the second light-emitting elements 40a and 40b are squares with one side being about 0.6 mm. The second light-emitting elements 40a and 40b are connected in series with each other, for example.

[0021] Inside the inner edge of the second frame portion 22, it is preferable to arrange the one or more second light-emitting elements 40 so as to be rectangular as a whole in plan view. Thereby, it is possible to easily arrange the second light-emitting element 40 in a small space more inward than the first light-emitting element 30. In the example of FIG. 3, the second light-emitting elements 40a and 40b overlap a rectangle F whose three sides forming the outer edge are indicated by broken lines and are arranged so as to be rectangular as a whole in plan view. In plan view, it is preferable that the centers of the rectangle E and the rectangle F overlap. Thereby, since the light-emitting centers of the first light-emitting elements 30a to 30d and the second light-emitting elements 40a and 40b can be made the same, the design of an optical system such as a lens becomes easy. In FIG. 3, the broken lines indicating the rectangle E and the rectangle F are virtual lines for convenience of explanation.

[0022] The first wavelength conversion member 61 is disposed in a region surrounded by the first frame portion 21 on the upper surface 10a of the substrate 10, and covers the second frame portion 22, the first light emitting element 30, and the second light emitting element 40. Further, the first wavelength conversion member 61 covers the inner edge of the first frame portion 21 and covers at least a part in the height direction continuous with the inner edge of the first frame portion 21. Note that the outer edge of the first frame portion 21 is exposed from the first wavelength conversion member 61. The upper surface of the first wavelength conversion member 61 is located above the upper surface of the first frame portion 21 and constitutes the light emitting surface of the light emitting device 1. The first wavelength conversion member 61 has translucency so that the light emitted from the first light emitting element 30 and the second light emitting element 40 can pass therethrough. The first wavelength conversion member 61 can contain a wavelength conversion material such as phosphor particles. For example, in the light emitting device 1, the first light emitting element 30 and the second light emitting element 40 are light emitting elements that emit blue light, and the first wavelength conversion member 61 contains phosphor particles that are excited by the blue light and emit red light. Thereby, the light emitting device 1 can be a light emitting device that emits red light. The light emitting device 1 can be used, for example, in lighting devices such as stop lamps and / or tail lamps of automobiles, motorcycles, etc.

[0023] As shown in FIGS. 4 and 5, the first wavelength conversion member 61 has a phosphor-containing portion 61a in which phosphor particles are unevenly distributed on the substrate 10 side. The thickness of the phosphor-containing portion 61a is less than the height of the first frame portion 21. In FIGS. 4 and 5, the broken line indicates the boundary between the phosphor-containing portion 61a and its upper part. In FIGS. 4 and 5, the broken line indicating the boundary is a virtual line for convenience of explanation. The boundary does not have to be linear. In the phosphor-containing portion 61a, the phosphor particles can be dispersed substantially uniformly. In the first wavelength conversion member 61, above the broken line, no phosphor particles may exist at all, or a smaller proportion of phosphor particles than in the phosphor-containing portion 61a may exist.

[0024] In the light-emitting device 1, in the first wavelength conversion member 61, by causing the phosphor particles to be unevenly distributed on the substrate 10 side, the heat generated by the phosphor particles can be efficiently dissipated through the substrate 10. Further, by causing the phosphor particles to be unevenly distributed on the substrate 10 side, the phosphor particles can be arranged close to the first light-emitting element 30 and the second light-emitting element 40. Thereby, the light from the first light-emitting element 30 and the second light-emitting element 40 can be efficiently wavelength-converted.

[0025] In the phosphor-containing portion 61a in the first wavelength conversion member 61, in the step of arranging the first wavelength conversion member 61, an uncured resin containing phosphor particles may be arranged inside the first frame portion 21, and the phosphor particles may be sedimented on the upper surface 10a side of the substrate 10 within the first frame portion 21. For example, when phosphor particles having a specific gravity greater than that of the uncured resin are selected, the phosphor particles can be sedimented before the uncured resin is cured. Further, the phosphor particles may be forcibly sedimented by centrifugal sedimentation or the like.

[0026] The height of the second frame portion 22 is less than the thickness of the phosphor-containing portion 61a. Thereby, the light wavelength-converted by the first wavelength conversion member 61 can be reflected upward at the interface between the first wavelength conversion member 61 and the second frame portion 22, so that the light extraction efficiency in the light-emitting device 1 can be improved.

[0027] The upper surface of the first wavelength conversion member 61 may be convex in a direction away from the upper surface 10a of the substrate 10. Thereby, the light emitted obliquely upward from the first light-emitting element 30 and the second light-emitting element 40 can be refracted in a substantially straight upward direction at the interface between the convex upper surface of the first wavelength conversion member 61 and the air, so that the light extraction efficiency in the light-emitting device 1 can be improved.

[0028] The circuit 70 includes wirings and electronic components disposed on the substrate 10. As shown in FIG. 6, the circuit 70 includes a first drive circuit 71 that drives the first light-emitting element 30 and a second drive circuit 72 that drives the second light-emitting element 40. The circuit 70 includes, for example, electronic components 71i to 71n that constitute the first drive circuit 71 and electronic components 72a to 72c that constitute the second drive circuit 72. The circuit 70 may have electronic components other than the electronic components 71i to 71n and the electronic components 72a to 72c. In the circuit 70, the first drive circuit 71 and the second drive circuit 72 can be independently driven. That is, the circuit 70 can cause the first light-emitting element 30 and the second light-emitting element 40 to emit light simultaneously or at different timings. The first light-emitting element 30 is used, for example, as a stop lamp of an automobile, and the second light-emitting element 40 can be used, for example, as a tail lamp of an automobile.

[0029] The light-emitting device 1 is preferably connected to the circuit 70 and has three or more connection terminals disposed along the outer edge of the upper surface 10a of the substrate 10 in a plan view. By the light-emitting device 1 having three or more connection terminals, it becomes possible to independently drive the first light-emitting element 30 and the second light-emitting element 40. Further, by arranging a plurality of connection terminals along the outer edge of the upper surface 10a, for example, when arranging a heat sink directly below a light source or an electronic component mounted on the substrate 10, it becomes difficult for the heat sink and the plurality of connection terminals to interfere with each other.

[0030] In the example of FIG. 1, three connection terminals 15a, 15b, and 15c are disposed along a first side 10s located at the outer edge of the upper surface 10a in a plan view and are connected to the wirings. The first side 10s constitutes one side of a rectangle in the substantially rectangular upper surface 10a. The connection terminals 15a, 15b, and 15c can be provided, for example, around through holes 10x that penetrate the substrate 10.

[0031] The connection terminals 15a and 15c are, for example, power input terminals, and the connection terminal 15b is, for example, a GND terminal. The connection terminals 15a, 15b, and 15c can be made of a conductive material such as a metal like gold, silver, copper, or aluminum. When mounting the light-emitting device 1 on a socket or the like, an external plug (for example, a power supply terminal) can be passed through each through-hole 10x and electrically connected to the connection terminals 15a, 15b, and 15c. Note that four or more connection terminals may be arranged along the outer edge of the upper surface 10a in a plan view.

[0032] As described above, the light-emitting device 1 has a second frame portion 22 disposed inside the inner edge of the first frame portion 21 on the upper surface 10a of the substrate 10. Thereby, it is possible to make it difficult for a chromaticity difference to occur in the emitted light of the light-emitting device 1 when only the first light-emitting element 30 emits light and when only the second light-emitting element 40 emits light. This will be described in detail below.

[0033] In the light-emitting device 1, the first light-emitting element 30 is disposed near the inner edge of the first frame portion 21, and the second light-emitting element 40 is located closer to the center of the first frame portion 21 than the first light-emitting element 30. And the first wavelength conversion member 61 covers the first light-emitting element 30 and the second light-emitting element 40. Therefore, if the light-emitting device 1 does not include the second frame portion 22, when only the second light-emitting element 40 emits light, the light traveling in the lateral direction (that is, the direction from the second light-emitting element 40 toward the first frame portion 21) among the light emitted from the second light-emitting element 40 has a long distance until it propagates through the first wavelength conversion member 61 and reaches the first frame portion 21.

[0034] Here, a case where the second light-emitting element 40 emits blue light and the wavelength-converting material contained in the first wavelength-converting member 61 is a red phosphor will be described as an example. For example, the absorption spectrum of the red phosphor has a peak near 450 nm, which is in the wavelength range of blue light. The red phosphor absorbs the blue light emitted by the second light-emitting element 40 and emits red light excited by the blue light. Thereby, the light-emitting device 1 having a red emission color can be obtained. Here, in the absorption spectrum and emission spectrum of the phosphor, there is an overlapping region between the long-wavelength side region of the absorption spectrum and the short-wavelength side region of the emission spectrum. For this reason, when the distance that the light wavelength-converted by the red phosphor propagates in the first wavelength-converting member 61 is long, among the wavelength-converted red light, the red light closer to the short wavelength is further wavelength-converted by the red phosphor. That is, the longer the distance from the second light-emitting element 40 to the first frame portion 21 when only the second light-emitting element 40 emits light, the larger the ratio of the component on the short-wavelength side of the red light that is absorbed. As a result, the red light emitted from the upper surface of the first wavelength-converting member 61 has less red emission light closer to the short wavelength in the emission spectrum of the red phosphor, and the red light closer to the long wavelength is more likely to be emitted.

[0035] On the other hand, since the first light-emitting element 30 is located near the first frame portion 21, the distance from the first light-emitting element 30 to the first frame portion 21 is shorter than the distance from the second light-emitting element 40 to the first frame portion 21. Therefore, the ratio of the component on the short-wavelength side of the red light absorbed from the light emitted from the first light-emitting element 30 is smaller than that of the light emitted from the second light-emitting element 40. As a result, when only the second light-emitting element 40 emits light, the emission spectrum of the red light emitted from the light-emitting device 1 is closer to the emission spectrum of the red phosphor than when only the first light-emitting element 30 emits light. That is, there is a chromaticity difference in the emitted light of the light-emitting device 1 between the case where only the first light-emitting element 30 emits light and the case where the second light-emitting element 40 emits light.

[0036] On the one hand, since the light-emitting device 1 has the second frame portion 22 disposed inside the inner edge of the first frame portion 21, a part of the light emitted from the second light-emitting element 40 that travels toward the first frame portion 21 reaches the second frame portion 22 before reaching the first frame portion 21. As a result, for the light emitted from the second light-emitting element 40 that travels toward the first frame portion 21, the distance traveled through the first wavelength conversion member 61 is shortened, so that the ratio of the components on the short-wavelength side of the red light absorbed can be reduced. Consequently, it is possible to make it difficult for a chromaticity difference to occur in the emitted light of the light-emitting device 1 between the case where only the first light-emitting element 30 emits light and the case where only the second light-emitting element 40 emits light. The chromaticity difference between the case where only the first light-emitting element 30 emits light and the case where only the second light-emitting element 40 emits light can be adjusted, for example, by the width, size, etc. of the second frame portion 22.

[0037] In addition, among the light emitted from the first light-emitting element 30 and the second light-emitting element 40 that travels in the horizontal direction or the diagonal direction, the light is reflected by the second frame portion 22 and travels upward, so that the light extraction efficiency in the light-emitting device 1 can be improved.

[0038] The light-emitting device 1 in the present embodiment includes a first light-emitting element 30, a second light-emitting element 40, and a first wavelength conversion member 61. The light emitted by the light-emitting device 1 includes the light emitted from the first light-emitting element 30 and the second light-emitting element 40 and wavelength-converted by the first wavelength conversion member 61. Thereby, for example, the light-emitting device 1 has light-emitting elements that emit blue light as the first light-emitting element 30 and the second light-emitting element 40, and the first wavelength conversion member 61 contains phosphor particles that are excited by blue light and emit red light, so that red light can be emitted. On the other hand, as a light-emitting device that emits red light, a light-emitting device using a light-emitting element that emits red light is used in many fields. In the present embodiment, by using blue light-emitting diodes as the first light-emitting element 30 and the second light-emitting element 40, good temperature characteristics can be obtained as compared with the case of using red light-emitting diodes as the first light-emitting element 30 and the second light-emitting element 40. That is, when the light-emitting device 1 is used as an illumination device for a vehicle or the like, the ambient temperature of use of the first light-emitting element 30 and the second light-emitting element 40 may reach a high temperature exceeding 100°C. Generally, since the luminous flux maintenance rate of a blue light-emitting diode at high temperature is higher than that of a red light-emitting diode, higher luminance can be maintained during high-temperature operation than in the case of using a red light-emitting diode.

[0039] Note that in the present embodiment, the first light-emitting element 30 and the second light-emitting element 40 are not limited to light-emitting elements that emit blue light, and light-emitting elements that emit desired light such as ultraviolet light and green light can be used. Further, the phosphor contained in the first wavelength conversion member 61 is not limited to a phosphor that is excited by blue light and emits red light, and a phosphor that can be excited by the light emitted from the first light-emitting element 30 and the second light-emitting element 40 and emits light can be used. The light-emitting device 1 can be made into a light-emitting device having a desired emission color by combining the emitted light of the first light-emitting element 30 and the second light-emitting element 40 with the phosphor contained in the first wavelength conversion member 61.

[0040] Hereinafter, each element constituting the light-emitting device 1 according to the embodiment will be described in detail.

[0041] [Substrate 10] The substrate 10 is a flat member having insulating properties. The substrate 10 has an upper surface 10a. The upper surface 10a is, for example, square or rectangular. The length of each side of the upper surface 10a can be, for example, about 1 cm or more and 3 cm or less. When the upper surface 10a is square or rectangular, chamfers or the like may be provided at each corner of the square or rectangle. Note that the upper surface 10a may be circular or polygonal.

[0042] The substrate 10 is made of, for example, a ceramic material such as aluminum oxide, aluminum nitride, or silicon nitride. The substrate 10 may be made of an insulating resin material such as a phenolic resin, an epoxy resin, a polyimide resin, a BT resin, or a polyphthalamide. The substrate 10 may be one in which an insulating member is disposed on the surface of a metal member.

[0043] On the upper surface 10a of the substrate 10, wirings and component mounting lands connected to the wirings are disposed. The wirings and the lands can be made of a material having conductivity such as a metal such as gold, silver, copper, or aluminum.

[0044] The light-emitting device 1 may be provided with a solder resist layer on the upper surface 10a of the substrate 10 that covers the wirings and exposes the lands and the connection terminals 15a, 15b, and 15c. The solder resist layer can be disposed, for example, with a photosensitive insulating resin or the like.

[0045] [First frame portion 21] The first frame portion 21 is disposed on the upper surface 10a of the substrate 10. The region surrounded by the first frame portion 21 is the light-emitting surface of the light-emitting device 1, and the light-emitting surface of the light-emitting device 1 is defined by the first frame portion 21. Further, the first frame portion 21 can be used as a dam for blocking the uncured first wavelength conversion member 61 in the manufacturing process of the light-emitting device 1. The first frame portion 21 surrounds the first light-emitting element 30 and the second light-emitting element 40 in plan view. In plan view, the width between the outer edge and the inner edge of the first frame portion 21 can be, for example, about 0.3 mm or more and 1 mm or less. The height of the first frame portion 21 from the upper surface 10a of the substrate 10 can be, for example, about 0.3 mm or more and 1 mm or less.

[0046] The first frame portion 21 can be, for example, rectangular in plan view. For example, if the first frame portion 21 is circular in plan view, the distances between the four corner portions of the rectangle E shown in FIG. 3 and the inner edge of the first frame portion 21 are closer than the distances between the four sides of the rectangle E and the inner edge of the circular first frame portion 21. Therefore, the amount of light emitted from near the four corner portions of the rectangle E in the light-emitting device 1 is less than the amount of light emitted from near the four sides of the rectangle E, resulting in uneven brightness. When the first frame portion 21 is rectangular in plan view, uneven brightness can be less likely to occur.

[0047] The first frame portion 21 contains, for example, a resin. Examples of the resin include known resins having translucency such as silicone resins and epoxy resins. Among them, a translucent resin of a silicone resin (specifically, phenyl silicone resin, dimethyl silicone resin, etc.) with excellent reliability can be preferably used. The first frame portion 21 preferably has light-shielding properties. In order to impart light-shielding properties to the first frame portion 21, a resin obtained by adding a pigment to the above-mentioned translucent resin can be used. Among them, the first frame portion 21 preferably has light reflectivity, and in the first frame portion 21, a filler such as a white pigment may be added to the resin in order to enhance the reflectivity. As the filler, titanium oxide, aluminum oxide, zinc oxide, barium carbonate, barium sulfate, boron nitride, aluminum nitride, glass filler, etc. can be preferably used. Further, the first frame portion 21 may further contain a black pigment such as carbon black, graphite, or titanium black.

[0048] [Second frame portion 22] The height of the second frame portion 22 from the upper surface 10a of the substrate 10 is preferably lower than the height of the first frame portion 21. Thereby, since the light wavelength-converted by the first wavelength conversion member 61 can be reflected more upward by the second frame portion 22, the light extraction efficiency in the light-emitting device 1 can be improved. The height of the second frame portion 22 from the upper surface 10a of the substrate 10 can be, for example, about 20% or more and 90% or less of the height of the first frame portion 21 from the upper surface 10a of the substrate 10.

[0049] Further, the second frame portion 22 has a top portion and an inclined surface extending from the top portion toward the substrate 10 side, and the inclined surface preferably includes a convex curved surface on the outside. For example, the second frame portion 22 is preferably semi-circular or semi-elliptical in a cross-sectional view. Thereby, since the light wavelength-converted by the first wavelength conversion member 61 can be reflected more upward by the second frame portion 22, the light extraction efficiency in the light-emitting device 1 can be improved.

[0050] The second frame portion 22 includes, for example, a resin. As the resin for the second frame portion 22, the translucent resin exemplified for the first frame portion 21 can be used. The second frame portion 22 preferably has light-shielding properties. In order to impart light-shielding properties, the second frame portion 22 can use a resin in which a pigment is added to the above-mentioned translucent resin. The second frame portion 22 preferably has light-reflective properties. In the second frame portion 22, by adding a filler such as a white pigment to the resin, light-reflective properties can be imparted to the second frame portion 22. As the filler, the filler exemplified for the first frame portion 21 can be used.

[0051] In the examples of FIGS. 1 to 5, the inner edge and the outer edge of the second frame portion 22 are rectangular in a plan view, and each side constituting the inner edge and the outer edge of the second frame portion 22 is parallel or perpendicular to any side constituting the inner edge of the rectangle of the first frame portion 21 in a plan view. Here, "parallel" and "perpendicular" shall allow a difference of ±5 degrees. Note that each side constituting the inner edge and the outer edge of the second frame portion 22 may not be parallel or perpendicular to any side constituting the inner edge of the rectangle of the first frame portion 21 in a plan view. In a plan view, the width between the outer edge and the inner edge of the second frame portion 22 can be equal to or less than the width between the outer edge and the inner edge of the first frame portion 21. For example, the width of the second frame portion 22 can be about 0.1 mm or more and 1.0 mm or less.

[0052] The second frame portion 22 does not have to be rectangular in a plan view. For example, as shown in FIG. 7, the second frame portion 22 may be elliptical in a plan view. Further, as shown in FIG. 8, when the light-emitting device 1 includes a plurality of second light-emitting elements, there may be a plurality of second frame portions 22. In this case, each second frame portion 22 can be arranged, for example, so as to individually surround the second light-emitting element 40.

[0053] Also, there may be one second light-emitting element 40. In this case, the second frame portion 22 can be, for example, rhombic as shown in FIG. 9. Also, as shown in FIG. 10, there may be three second light-emitting elements 40. In this case, the second frame portion 22 can be, for example, circular. Even when there are four or more second light-emitting elements 40, the second frame portion 22 can have an appropriate shape according to the arrangement of the second light-emitting elements 40.

[0054] [First light-emitting element 30, second light-emitting element 40] The first light-emitting element 30 and the second light-emitting element 40 are mounted on the lands for component mounting on the substrate 10. The first light-emitting element 30 and the second light-emitting element 40 are preferably flip-chip mounted on the substrate 10. In flip-chip mounting, the electrodes of the first light-emitting element 30 and the second light-emitting element 40 and the lands on the substrate 10 can be electrically joined using joining members such as eutectic solder, conductive paste, and bumps.

[0055] The first light-emitting element 30 and the second light-emitting element 40 are light-emitting diodes. The specific configuration of the first light-emitting element 30 and the second light-emitting element 40 is arbitrary as long as they can emit light of a predetermined wavelength. For example, the first light-emitting element 30 and the second light-emitting element 40 may be those in which an LED chip is housed in a package, or may be a single LED chip (bare chip). Among them, it is preferable that the first light-emitting element 30 and the second light-emitting element 40 are those in which a bare chip is flip-chip mounted on the substrate 10. Thereby, miniaturization of the light-emitting device 1 becomes possible.

[0056] The first light-emitting element 30 and the second light-emitting element 40 include a semiconductor structure. The semiconductor structure includes an n-side semiconductor layer, a p-side semiconductor layer, and an active layer sandwiched between the n-side semiconductor layer and the p-side semiconductor layer. The active layer may have a single quantum well (SQW) structure or a multiple quantum well (MQW) structure including a plurality of well layers. The semiconductor structure includes a plurality of semiconductor layers made of a nitride semiconductor. The nitride semiconductor is In x Al y Ga 1-x-yIt includes semiconductors of all compositions in which the composition ratios x and y are varied within their respective ranges in the chemical formula consisting of N(0≦x, 0≦y, x + y≦1). The emission peak wavelength of the active layer can be appropriately selected according to the purpose. The active layer is configured to be capable of emitting, for example, visible light or ultraviolet light.

[0057] The semiconductor structure may include a plurality of light-emitting portions each including an n-side semiconductor layer, an active layer, and a p-side semiconductor layer. When the semiconductor structure includes a plurality of light-emitting portions, each light-emitting portion may include well layers having different emission peak wavelengths, or may include well layers having the same emission peak wavelength. Note that the case where the emission peak wavelengths are the same includes cases where there is a variation of about several nm. The combination of the emission peak wavelengths of the plurality of light-emitting portions can be appropriately selected. For example, when the semiconductor structure includes two light-emitting portions, examples of the combination of the light emitted from each light-emitting portion include combinations such as blue light and blue light, green light and green light, ultraviolet light and ultraviolet light, blue light and green light, blue light and ultraviolet light, or green light and ultraviolet light. For example, when the semiconductor structure includes three light-emitting portions, an example of the combination of the light emitted from each light-emitting portion is a combination of blue light, green light, and red light. Each light-emitting portion may include one or more well layers having an emission peak wavelength different from that of other well layers.

[0058] The wavelengths of the light emitted from the first light-emitting element 30 and the second light-emitting element 40 are appropriately set according to the use of the light-emitting device 1. The first light-emitting element 30 and the second light-emitting element 40 are, for example, blue light-emitting elements that emit blue light. When the first light-emitting element 30 and the second light-emitting element 40 are nitride-based semiconductor light-emitting elements that emit blue light, the forward voltage of the first light-emitting element 30 and the second light-emitting element 40 is, for example, 2.6 V or more.

[0059] [First wavelength conversion member 61] The first wavelength conversion member 61 contains, for example, a resin. As the resin, the translucent resin exemplified in the first frame portion 21 can be used. The phosphor contained in the first wavelength conversion member 61 is excited by the light emitted from the first light emitting element 30 and the second light emitting element 40, and emits light having a wavelength different from the wavelength of the light emitted from the first light emitting element 30 and the second light emitting element 40. As an example, when the first light emitting element 30 and the second light emitting element 40 are blue light emitting elements, the first wavelength conversion member 61 may contain a red phosphor. In this case, the first light emitting element 30 and the second light emitting element 40 emit blue light, and the first wavelength conversion member 61 can be excited by the blue light and emit red light. In this case, the light emitting device 1 that emits red light from the light emitting surface can be realized.

[0060] Examples of the phosphor include yttrium aluminum garnet-based phosphors (e.g., (Y,Gd)3(Al,Ga)5O 12 :Ce), lutetium aluminum garnet-based phosphors (e.g., Lu3(Al,Ga)5O 12 :Ce), terbium aluminum garnet-based phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), CCA-based phosphors (e.g., Ca 10 (PO4)6Cl2:Eu), SAE-based phosphors (e.g., Sr4Al 14 O 25 :Eu), chlorosilicate-based phosphors (e.g., Ca8MgSi4O 16 Cl2:Eu), silicate-based phosphors (e.g., (Ba,Sr,Ca,Mg)2SiO4:Eu), β-sialon-based phosphors (e.g., (Si,Al)3(O,N)4:Eu) or α-sialon-based phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu), etc., oxynitride-based phosphors, LSN-based phosphors (e.g., (La,Y)3Si6N 11:Ce), BSESN-based phosphors (e.g., (Ba,Sr)2Si5N8:Eu), SLA-based phosphors (e.g., SrLiAl3N4:Eu), CASN-based phosphors (e.g., CaAlSiN3:Eu), or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN3:Eu), etc., nitride-based phosphors, KSF-based phosphors (e.g., K2SiF6:Mn), KSAF-based phosphors (e.g., K2(Si 1-x Al x )F 6-x :Mn where x satisfies 0 < x < 1), or fluoride-based phosphors such as MGF-based phosphors (e.g., 3.5MgO·0.5MgF2·GeO2:Mn), quantum dots having a perovskite structure (e.g., (Cs,FA,MA)(Pb,Sn)(F,Cl,Br,I)3 where FA and MA represent formamidinium and methylammonium, respectively), II-VI group quantum dots (e.g., CdSe), III-V group quantum dots (e.g., InP), or quantum dots having a chalcopyrite structure (e.g., (Ag,Cu)(In,Ga)(S,Se)2), etc. can be used.

[0061] [Circuit 70] The electronic component 71l of the first drive circuit 71 is an integrated circuit that drives the first light-emitting element 30. The first light-emitting elements 30a to 30d are connected in series to the output side of the electronic component 71l. It is preferable that a voltage be supplied to the electronic component 71l from the outside without passing through an active element (such as a rectifying diode) that causes a voltage drop. Thereby, more of the voltage supplied from the outside can be used to drive the first light-emitting element 30. When the first light-emitting element 30 is a blue light-emitting diode, since the forward voltage is relatively high, it is significant that a voltage be supplied to the electronic component 71l from the outside without passing through an active element. By including an integrated circuit as the electronic component 71l, the first drive circuit 71 can control the value of the current flowing through the first light-emitting element 30. The electronic component 71l, which is an integrated circuit, can be arranged outside the first frame portion 21 on the substrate 10. Thereby, light absorption by the electronic component 71l can be reduced. Further, when the electronic component 71l is rectangular in plan view, it is possible to easily arrange the electronic component in a limited space on the upper surface 10a of the substrate 10 along the frame portion 20.

[0062] The electronic components 71i to 71k are resistors that set the operating voltage of the electronic component 71l. The electronic component 71m is a resistor that sets the output current of the electronic component 71l. The electronic component 71n is a thermistor that detects the ambient temperature of the electronic component 71l. The electronic component 71l can control the value of the current flowing through the first light-emitting element 30, for example, when the temperature of the substrate 10 rises, based on the temperature detected by the electronic component 71n.

[0063] The light-emitting device 1 may have the first light-emitting element 30 connected in parallel to the electronic component 72l, which is an integrated circuit. In the example of FIG. 6, the first light-emitting elements 30a to 30c connected in series to each other and the first light-emitting element 30d are connected in parallel to the electronic component 72l.

[0064] The first drive circuit 71 may have a first operation mode in which all of the first light emitting elements 30a to 30d emit light simultaneously, and a second operation mode in which only the first light emitting elements 30a to 30c emit light. The second mode is effective, for example, when the voltage applied between the connection terminal 15a and the connection terminal 15b drops and it becomes difficult to drive the four light emitting elements simultaneously.

[0065] Note that the first drive circuit 71 may be configured to include an integrated circuit or may be configured not to include an integrated circuit. When the first drive circuit 71 includes an integrated circuit, a large current can be supplied to the first light emitting element 30, so the light emission intensity of the first light emitting element 30 can be increased. When it is not necessary to increase the light emission intensity of the first light emitting element 30, the first drive circuit 71 may be configured to include, for example, a transistor instead of an integrated circuit, or to apply a voltage supplied from the outside through a resistor to the first light emitting element 30.

[0066] The circuit 70 may include a peripheral circuit of the first drive circuit 71 as necessary. In the example of FIG. 6, the circuit 70 includes electronic components 71a to 71h as a peripheral circuit of the first drive circuit 71.

[0067] The electronic components 71a and 71b are capacitors for noise countermeasures and are connected in series between the connection terminal 15a and the connection terminal 15b. The electronic components 71a and 71b can reduce, for example, radio wave noise such as radio and noise induced in the cable. The electronic components 71a and 72b are connected on the input side closer than the electronic component 71g. Here, the side closer to the connection terminals 15a and 15b in the circuit 70 is referred to as the input side, and the side closer to the first light emitting element 30 is referred to as the output side.

[0068] Electronic components 71c to 71f are reverse connection protection circuits and are connected to the output sides of electronic components 71a and 71b which are capacitors. Electronic component 71c is a resistor and controls the current value flowing through electronic component 71d. Electronic component 71d is a metal-oxide-semiconductor field-effect transistor (MOSFET) and prevents current from flowing from connection terminal 15b to the connection terminal 15a side. Electronic component 71e is a capacitor and protects electronic component 71d when a sudden overvoltage in the reverse direction is applied. Electronic component 71f is a Zener diode and protects such that the voltage applied to the electronic component 71e side of electronic component 71d does not exceed the maximum rating when current flows from connection terminal 15a to the connection terminal 15b side.

[0069] One end of electronic component 71c is connected to connection terminal 15a, and the other end is connected to the gate of electronic component 71d, one end of electronic component 71e, and the cathode of electronic component 71f. Also, the source of electronic component 71d is connected to connection terminal 15b, and the anode of electronic component 71f is connected to the drain of electronic component 71d. In this circuit, since the gate of electronic component 71d is biased, the voltage drop between the drain and source of electronic component 71d becomes small, so that a reverse connection protection circuit with suppressed power consumption can be realized.

[0070] Electronic component 71g is a TVS (Transient Voltage Suppressors) diode that protects other electronic components when an overvoltage is applied and is connected between connection terminal 15a and connection terminal 15b. Electronic component 71g is connected on the output side relative to electronic components 71c to 71f and on the input side relative to the first drive circuit 71.

[0071] Electronic component 71h is a capacitor for noise countermeasures and is connected between connection terminal 15a and connection terminal 15b. Electronic component 71h is connected on the output side relative to electronic components 71c to 71f and on the input side relative to the first drive circuit 71.

[0072] The second drive circuit 72 is connected in series with the second light-emitting element 40. The electronic component 72a is a rectifying diode, and the anode of the electronic component 72a is connected to the connection terminal 15c. The electronic component 72a can protect the second light-emitting elements 40a and 40b from negative electrode surges, along with protection against reverse connection. The electronic components 72b and 72c are resistors connected between the cathode of the electronic component 72a and the second light-emitting element 40, and they adjust the current flowing through the second light-emitting elements 40a and 40b.

[0073] Thus, the second drive circuit 72 has no integrated circuit or transistor, but has the electronic component 72a which is a rectifying diode, and the electronic components 72b and 72c which are resistors connected in series to the cathode of the rectifying diode. The second light-emitting element 40 emits light by the current supplied via the electronic component 72a which is a rectifying diode, and the electronic components 72b and 72c which are resistors.

[0074] The circuit 70 may include a peripheral circuit of the second drive circuit 72 as needed. In the example of FIG. 6, the circuit 70 includes the electronic components 72d to 72f as a peripheral circuit of the second drive circuit 72. The electronic component 72d is a Zener diode for protecting the second light-emitting element 40 from positive electrode surges, and is connected in series between the connection terminal 15c and the connection terminal 15b. The electronic components 72e and 72f are capacitors for noise countermeasures, and are connected in series between the connection terminal 15c and the connection terminal 15b. The electronic components 72e and 72f can reduce, for example, radio wave noise such as radio, and noise induced in the cable. The electronic components 72e and 72f are connected on the output side rather than the electronic component 72d.

[0075] Note that the circuit configuration shown in FIG. 6 is an example, and the light-emitting device 1 may have another circuit configuration. The circuit configuration provided in the light-emitting device 1 can be appropriately changed according to the use of the light-emitting device 1 and the like.

[0076] (Modification example) FIG. 11 is a cross-sectional view illustrating a light-emitting device according to a modified example of the first embodiment. As shown in FIG. 11, the light-emitting device according to the modified example of the first embodiment is different from the light-emitting device 1 according to the first embodiment in that it further includes a second wavelength conversion member 62.

[0077] The second wavelength conversion member 62 is disposed in a region surrounded by the second frame portion 22 and covers the second light-emitting element 40. The thickness of the second wavelength conversion member 62 may be the same as the height of the second frame portion 22, may be higher than the height of the second frame portion 22, or may be lower than the height of the second frame portion 22. Among these, it is preferable that the thickness of the second wavelength conversion member 62 is equal to or less than the height of the second frame portion 22. Thereby, since it is possible to reduce the excitation of the phosphor particles contained in the second wavelength conversion member 62 by the light emitted from the first light-emitting element 30, it becomes easy to adjust the chromaticity when only the first light-emitting element 30 emits light. The first wavelength conversion member 61 covers the second light-emitting element 40 via the second wavelength conversion member 62. The second wavelength conversion member 62 can contain phosphor particles. The peak wavelength region of the phosphor particles contained in the second wavelength conversion member 62 may be the same as or different from the peak wavelength region of the phosphor particles contained in the first wavelength conversion member 61. Similar to the first wavelength conversion member 61, the second wavelength conversion member 62 may have a phosphor-containing portion in which the phosphor particles are unevenly distributed on the substrate side. In this case, it is preferable that the thickness of the phosphor-containing portion in the second wavelength conversion member 62 is equal to or greater than the height of the second light-emitting element.

[0078] For example, when the first light-emitting element 30 and the second light-emitting element 40 are blue light-emitting elements, the second wavelength conversion member 62 can contain phosphor particles that are excited by blue light and emit red light. In this case, the first wavelength conversion member 61 may also contain phosphor particles that are excited by blue light and emit red light, similar to the second wavelength conversion member 62. For example, the first wavelength conversion member 61 and the second wavelength conversion member 62 may contain phosphor particles having the same composition, and the concentration and particle diameter of the phosphor particles contained in each can be made different. Thereby, when only the first light-emitting element 30 emits light, when only the second light-emitting element 40 emits light, and when both the first light-emitting element 30 and the second light-emitting element emit light, it is possible to improve the chromaticity difference and adjust the chromaticity difference of the light emitted from the light-emitting device.

[0079] The first wavelength conversion member 61 and the second wavelength conversion member 62 may each contain phosphor particles having different compositions. For example, by having the first wavelength conversion member 61 and the second wavelength conversion member 62 contain phosphor particles having the same or different compositions and making the concentration and particle diameter of the phosphor particles contained in each different, light having a desired chromaticity can be emitted from the light-emitting device.

[0080] For example, when the first light-emitting element 30 and the second light-emitting element 40 are blue light-emitting elements, the second wavelength conversion member 62 may include a yellow phosphor that is excited by blue light and emits yellow light. In this case, when only the second light-emitting element 40 emits light, blue light and yellow light excited by the blue light are mixed, and white light is emitted from the light-emitting device. Further, when the first light-emitting element 30 is a blue light-emitting element, the first wavelength conversion member 61 may include a red phosphor and a yellow phosphor. In this case, when only the first light-emitting element 30 emits light, blue light, red light, and yellow light excited by the blue light are mixed, and amber-colored light is emitted from the light-emitting device. In such a specification, the first light-emitting element 30 is used, for example, as a turn signal lamp (direction indicator) of an automobile, and the second light-emitting element 40 can be used, for example, as a daytime running lamp of an automobile. Note that the first wavelength conversion member 61 may include a yellow phosphor, and the second wavelength conversion member 62 may include a red phosphor and a yellow phosphor. Further, by independently controlling the light outputs of the first light-emitting element 30 and the second light-emitting element 40, a light-emitting device capable of emitting mixed-color light with a desired chromaticity can be obtained.

[0081] <Second Embodiment> FIG. 12 is a partial plan view illustrating a first frame portion and the inside thereof in the light-emitting device according to the second embodiment. FIG. 13 is a cross-sectional view taken along line XIII-XIII in FIG. 12.

[0082] As shown in FIGS. 12 and 13, the light-emitting device according to the second embodiment is different from the light-emitting device 1 according to the first embodiment in that it further includes a wall portion 50.

[0083] The wall portion 50 can be arranged to extend from the inner edge side of the first frame portion 21 toward the outer edge side of the second frame portion 22 on the upper surface 10a of the substrate 10. The wall portion 50 may be one or a plurality. When the light-emitting device according to the second embodiment includes a plurality of wall portions 50 and the first frame portion 21 is rectangular in plan view, it is preferable that the plurality of wall portions 50 extend from two opposite sides of the rectangle in plan view toward the outer edge of the second frame portion 22 and are arranged. One end of the wall portion 50 preferably contacts the first frame portion 21, and the other end preferably contacts the second frame portion 22.

[0084] In the example of FIG. 12, the wall portion 50 includes four wall portions 50, each of which is disposed one by one between adjacent first light emitting elements 30 in a plan view. Specifically, one wall portion 50 is disposed between the first light emitting element 30a and the first light emitting element 30b, between the first light emitting element 30a and the first light emitting element 30c, between the first light emitting element 30b and the first light emitting element 30d, and between the first light emitting element 30c and the first light emitting element 30d. That is, the wall portion 50 includes four wall portions that respectively extend from each of the four sides of the rectangular first frame portion 21 toward the second frame portion 22. In the example of FIG. 12, four regions of substantially the same area surrounded by the first frame portion 21, the second frame portion 22, and the wall portion 50 are defined in a plan view. And one first light emitting element 30 is disposed in each of the four defined regions.

[0085] The height of the wall portion 50 from the upper surface 10a of the substrate 10 is preferably lower than the height of the first frame portion 21. Thereby, since the light wavelength-converted by the first wavelength conversion member 61 can be reflected more upward by the wall portion 50, the light extraction efficiency in the light emitting device can be improved. The height of the wall portion 50 from the upper surface 10a of the substrate 10 can be, for example, the same as the height of the second frame portion 22 from the upper surface 10a of the substrate 10. The height of the wall portion 50 from the upper surface 10a of the substrate 10 does not have to be the same as the height of the second frame portion 22 from the upper surface 10a of the substrate 10.

[0086] In a plan view, the width of the wall portion 50 (that is, the length in a direction perpendicular to the direction in which the wall portion extends from the first frame portion 21 toward the second frame portion 22) can be the same as the width of the second frame portion 22. The width of the wall portion 50 does not have to be the same as the width of the second frame portion 22.

[0087] Also, the heights and / or widths of the plurality of wall portions 50 may be the same as each other or different from each other. Also, one wall portion 50 may include regions with different heights and different widths partially.

[0088] Also, similar to the second frame portion 22, the wall portion 50 is preferably semi-circular or semi-elliptical in cross-section. Thereby, since the light wavelength-converted by the first wavelength conversion member 61 can be reflected more upward by the wall portion 50, the light extraction efficiency in the light-emitting device can be improved. The wall portion 50 includes, for example, the same resin as the second frame portion 22. Similar to the second frame portion 22, a filler such as a white pigment may be added to the resin to enhance reflectivity.

[0089] The height of the wall portion 50 is preferably less than the height of the phosphor-containing portion 61a. Thereby, since the light wavelength-converted by the first wavelength conversion member 61 can be reflected more upward by the wall portion 50, the light extraction efficiency in the light-emitting device can be improved.

[0090] Thus, in the light-emitting device according to the second embodiment, in addition to the second frame portion 22, the wall portion 50 is disposed inside the inner edge of the first frame portion 21. Thereby, the degree of freedom in adjusting the chromaticity difference between the case where only the first light-emitting element 30 emits light and the case where only the second light-emitting element 40 emits light can be increased.

[0091] Although the preferred embodiments etc. have been described in detail above, the present invention is not limited to the above-described embodiments etc., and various modifications and substitutions can be made to the above-described embodiments etc. without departing from the scope described in the claims.

[0092] In addition to the above embodiments, the following additional remarks are further disclosed. (Additional Remark 1) A substrate, A first frame portion disposed on the upper surface of the substrate, A second frame portion disposed inside the inner edge of the first frame portion on the upper surface of the substrate, A first light-emitting element disposed between the inner edge of the first frame portion and the outer edge of the second frame portion on the upper surface of the substrate, A second light-emitting element disposed inside the inner edge of the second frame portion on the upper surface of the substrate, On the upper surface of the substrate, a first wavelength conversion member is disposed in a region surrounded by the first frame portion and covers the second frame portion, the first light-emitting element, and the second light-emitting element. A circuit including a first driving circuit that drives the first light-emitting element and a second driving circuit that drives the second light-emitting element. The first wavelength conversion member has a phosphor-containing portion in which phosphor particles are unevenly distributed on the substrate side, and the height of the second frame portion is less than the thickness of the phosphor-containing portion. The light-emitting device. (Appendix 2) The first frame portion is rectangular in plan view. The light-emitting device according to Appendix 1. (Appendix 3) The second frame portion is rectangular in plan view. The light-emitting device according to Appendix 1 or 2. (Appendix 4) A plurality of the first light-emitting elements are provided. The plurality of first light-emitting elements are arranged so as to be rectangular as a whole in plan view. The light-emitting device according to any one of Appendices 1 to 3. (Appendix 5) A plurality of the second light-emitting elements are provided. The plurality of second light-emitting elements are arranged so as to be rectangular as a whole in plan view. The light-emitting device according to any one of Appendices 1 to 4. (Appendix 6) The second frame portion has light reflectivity. The light-emitting device according to any one of Appendices 1 to 5. (Appendix 7) The height of the second frame portion is lower than the height of the first frame portion. The light-emitting device according to any one of Appendices 1 to 6. (Appendix 8) The upper surface of the first wavelength conversion member is convex. The thickness of the phosphor-containing portion is less than the height of the first frame portion. The light-emitting device according to any one of Appendices 1 to 7. (Appendix 9) The first light-emitting element and the second light-emitting element are blue light-emitting elements. The first wavelength conversion member contains phosphor particles that are excited by blue light and emit red light. The light-emitting device according to any one of Appendices 1 to 8. (Appendix 10) Further includes a second wavelength conversion member disposed in the region surrounded by the second frame portion and covering the second light emitting element. The first wavelength conversion member covers the second light emitting element via the second wavelength conversion member, and the light emitting device according to any one of Appendices 1 to 9. (Appendix 11) The second light emitting element is a blue light emitting element. The second wavelength conversion member contains phosphor particles that are excited by blue light and emit red light, and the light emitting device according to Appendix 10. (Appendix 12) The second wavelength conversion member contains phosphor particles. The phosphor concentration in the second wavelength conversion member is different from the phosphor concentration in the first wavelength conversion member, and the light emitting device according to Appendix 10 or 11. (Appendix 13) Connected to the circuit and having three or more connection terminals disposed along the outer edge of the upper surface of the substrate in a plan view, and the light emitting device according to any one of Appendices 1 to 12. (Appendix 14) The circuit includes an integrated circuit. The light emitting device according to any one of Appendices 1 to 13, having the first light emitting element connected in parallel to the integrated circuit.

Explanation of Reference Numerals

[0093] 1 Light emitting device 10 Substrate 10a Upper surface 15a, 15b, 15c Connection terminals 21 First frame portion 22 Second frame portion 30, 30a, 30b, 30c, 30d First light emitting elements 40, 40a, 40b Second light emitting elements 50 Wall portion 61 First wavelength conversion member 61a Phosphor-containing portion 62 Second wavelength conversion member 70 Circuit 71 First drive circuit 71a~71n Electronic components 72 Second drive circuit 72a to 72f Electronic components

Claims

1. A substrate; A first frame portion disposed on an upper surface of the substrate; a second frame portion disposed inside an inner edge of the first frame portion on an upper surface of the substrate; a first light-emitting element disposed on an upper surface of the substrate between an inner edge of the first frame portion and an outer edge of the second frame portion; a second light-emitting element disposed on the upper surface of the substrate, the second light-emitting element being disposed inside an inner edge of the second frame portion; a first wavelength conversion member that is disposed on an upper surface of the substrate in a region surrounded by the first frame portion and covers the second frame portion, the first light emitting element, and the second light emitting element; a circuit including a first drive circuit for driving the first light-emitting element and a second drive circuit for driving the second light-emitting element; a height of the second frame portion being less than a thickness of the phosphor-containing portion;

2. The light emitting device according to claim 1 , wherein the first frame portion has a rectangular shape in a plan view.

3. The light emitting device according to claim 1 , wherein the second frame portion has a rectangular shape in a plan view.

4. A plurality of the first light emitting elements are provided, The light emitting device according to claim 1 , wherein the first light emitting elements are arranged so as to form a rectangle as a whole in a plan view.

5. A plurality of the second light emitting elements are provided, The light emitting device according to claim 1 , wherein the second light emitting elements are arranged so as to form a rectangle as a whole in a plan view.

6. The light emitting device according to claim 1 , wherein the second frame portion is light reflective.

7. The light emitting device according to claim 1 , wherein a height of the second frame portion is lower than a height of the first frame portion.

8. an upper surface of the first wavelength conversion member is convex; The light emitting device according to claim 1 , wherein a thickness of the phosphor-containing portion is less than a height of the first frame portion.

9. the first light emitting element and the second light emitting element are blue light emitting elements, The light emitting device according to claim 1 , wherein the first wavelength conversion member contains phosphor particles that are excited by blue light and emit red light.

10. The second light emitting element may further include a second wavelength conversion member that is disposed in a region surrounded by the second frame portion and covers the second light emitting element, The first wavelength conversion member covers the second light emitting element via the second wavelength conversion member. A light emitting device according to claim 1 .

11. the second light emitting element is a blue light emitting element, The light emitting device according to claim 10 , wherein the second wavelength conversion member contains phosphor particles that are excited by blue light and emit red light.

12. The second wavelength conversion member contains phosphor particles, The light emitting device of claim 10 , wherein a phosphor concentration in the second wavelength conversion member is different from a phosphor concentration in the first wavelength conversion member.

13. The light emitting device according to claim 1 , further comprising three or more connection terminals connected to the circuit and arranged along an outer edge of the upper surface of the substrate in a plan view.

14. the circuit comprises an integrated circuit; The light emitting device according to claim 1 , further comprising the first light emitting element connected in parallel to the integrated circuit.

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