JP2018120961A - Light-emitting device and illumination device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting device capable of suppressing generation of color unevenness and the like.SOLUTION: A light-emitting device 1 comprises: a substrate 10; a first light-emitting unit 20 and a second light-emitting unit 30 arranged side by side on the substrate 10, the first light-emitting unit emitting first light of a first light color and the second light-emitting unit emitting second light of a second light color different from the first light color; and a translucent optical member 40 arranged so as to sandwich the first light-emitting unit 20 and the second light-emitting unit 30 between itself and the substrate 10. In a plan view, the optical member 40 includes a recess 41 provided so as to overlap both the first light-emitting unit 20 and the second light-emitting unit 30 and so as not to overlap a part of at least one of the first light-emitting unit 20 and the second light-emitting unit 30.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a light emitting device and an illumination device including the light emitting device.

  BACKGROUND Semiconductor light emitting devices such as light emitting diodes (LEDs) are widely used in various light emitting devices such as lighting applications and display applications as high-efficiency and space-saving light sources.

  For example, Patent Document 1 discloses an LED light-emitting device that includes a lens on an upper part of a light-emitting unit formed concentrically on a circuit board. In the LED light-emitting device described in Patent Document 1, the spot shape of illumination is adjusted by a lens.

JP 2014-82236 A

  However, in the above conventional LED light emitting device, light from the light emitting element provided in the central portion of the circuit board is irradiated to the central portion of the irradiation surface, and the peripheral portion of the circuit substrate is irradiated to the peripheral portion of the irradiation surface. Light is emitted from the provided light emitting element. For this reason, color unevenness occurs on the irradiated surface in accordance with the arrangement of the light emitting elements provided on the circuit board.

  In view of the above, an object of the present invention is to provide a light emitting device capable of suppressing the occurrence of uneven color and a lighting device including the light emitting device.

  In order to achieve the above object, a light-emitting device according to one embodiment of the present invention includes a substrate, a first light-emitting portion that is arranged side by side on the substrate and emits first light of a first light color, and the first light-emitting device. A second light emitting unit that emits a second light of a second light color different from the one light color, and a translucency disposed so as to sandwich the first light emitting unit and the second light emitting unit between the substrate and the substrate. The optical member overlaps both the first light emitting unit and the second light emitting unit in a plan view and is at least one of the first light emitting unit and the second light emitting unit. A concave portion or a convex portion provided so as not to overlap the portion.

  An illumination device according to one embodiment of the present invention includes the light-emitting device and a lighting device that supplies power to the light-emitting device to light the light-emitting device.

  ADVANTAGE OF THE INVENTION According to this invention, the light-emitting device etc. which can suppress generation | occurrence | production of color unevenness can be provided.

1 is an external perspective view of a light emitting device according to Embodiment 1. FIG. 3 is a plan view of the light emitting device according to Embodiment 1. FIG. It is sectional drawing of the light-emitting device which concerns on Embodiment 1 in the III-III line of FIG. 2 is a partial enlarged cross-sectional view of the light emitting device according to Embodiment 1. FIG. 3 is a cross-sectional view schematically showing a light path of the light-emitting device according to Embodiment 1. FIG. 4 is a cross-sectional view of a light emitting device according to Embodiment 2. FIG. 6 is a cross-sectional view schematically showing a light path of a light emitting device according to Embodiment 2. FIG. It is a top view of the light-emitting device which concerns on the modification of embodiment. 6 is a cross-sectional view of a lighting device according to Embodiment 3. FIG. It is an external appearance perspective view of the illuminating device which concerns on Embodiment 3, and its peripheral member.

  Hereinafter, a light-emitting device and an illumination device according to an embodiment of the present invention will be described in detail with reference to the drawings. Each of the embodiments described below shows a specific example of the present invention. Therefore, numerical values, shapes, materials, components, arrangement and connection forms of components, steps, order of steps, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims showing the highest concept of the present invention are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. Therefore, for example, the scales and the like do not necessarily match in each drawing. Moreover, in each figure, the same code | symbol is attached | subjected about the substantially same structure, The overlapping description is abbreviate | omitted or simplified. In the following embodiments, expressions using “substantially” such as substantially parallel are used. For example, substantially parallel means not only that it is completely parallel, but also that it is substantially parallel, i.e. includes a difference of, for example, a few percent. The same applies to expressions using other “abbreviations”.

  In the present specification and drawings, the x axis, the y axis, and the z axis indicate the three axes of the three-dimensional orthogonal coordinate system. In each embodiment, the z-axis direction is the vertical direction, and the direction perpendicular to the z-axis (the direction parallel to the xy plane) is the horizontal direction. Note that the positive direction of the z-axis is defined as vertically downward (light emission direction). In this specification, the “thickness direction” means the thickness direction of the light-emitting device and is a direction perpendicular to the main surface of the substrate. “Plan view” means the direction of the main surface of the substrate. When viewed from a vertical direction.

(Embodiment 1)
[Overview]
First, the outline of the light-emitting device according to this embodiment will be described with reference to FIGS. FIG. 1 is an external perspective view of a light emitting device 1 according to the present embodiment. FIG. 2 is a plan view of the light emitting device 1 according to the present embodiment. 3 is a cross-sectional view of the light-emitting device 1 according to the present embodiment taken along the line III-III in FIG.

  In FIG. 1, the optical member 40 is shown separated from the substrate 10 for easy understanding of the arrangement of the first light emitting unit 20 and the second light emitting unit 30 on the substrate 10. Further, in FIG. 2, the position of the opening end portion (pointed end portion) 42 of the concave portion 41 of the optical member 40 is indicated by a broken line without showing the entire optical member 40. The space between two adjacent broken lines corresponds to the recess 41. Moreover, in each figure, illustration of the wiring pattern on the board | substrate 10, a bonding wire etc. which are used for the electrical connection of a LED chip is abbreviate | omitted.

  As shown in FIGS. 1 to 3, the light emitting device 1 according to the present embodiment includes a substrate 10, a first light emitting unit 20, a second light emitting unit 30, and an optical member 40. As shown in FIG. 3, the first light emitting unit 20 includes a plurality of first LED chips 21 and a first sealing member 22. The second light emitting unit 30 includes a plurality of second LED chips 31 and a second sealing member 32. The light emitting device 1 emits mixed light of light (first light) emitted from the first light emitting unit 20 and light (second light) emitted from the second light emitting unit 30 to the outside.

  Hereinafter, the first light emitting unit 20 and the second light emitting unit 30 may be collectively referred to simply as “light emitting unit”. Similarly, the first LED chip 21 and the second LED chip 31 may be collectively referred to simply as “LED chip”. The first sealing member 22 and the second sealing member 32 may be collectively referred to simply as “sealing member”.

  The light emitting device 1 is an LED module having a so-called COB (Chip On Board) structure in which an LED chip is directly mounted on a substrate 10. On the substrate 10, a plurality of light emitting element arrays (light emitting portions) made up of a plurality of LED chips are provided concentrically.

  In the present embodiment, the light emitting device 1 includes a plurality of at least one of the first light emitting unit 20 and the second light emitting unit 30. Specifically, as illustrated in FIGS. 1 and 2, the light emitting device 1 includes two first light emitting units 20 and two second light emitting units 30. Two first light emitting units 20 and two second light emitting units 30 are arranged alternately one by one from the center of the substrate 10 toward the periphery. The optical member 40 is disposed so as to cover the four light emitting element rows.

  The plurality of concave portions 41 provided in the plurality of first light emitting units 20, the plurality of second light emitting units 30, and the optical member 40 are formed of a plurality of lines substantially parallel to each other (specifically, curved lines (circumferential )) Is arranged along. In the present embodiment, the plurality of first light emitting units 20, the plurality of second light emitting units 30, and the plurality of concave portions 41 are arranged along a plurality of circular rings having a predetermined center as a common center. That is, the plurality of first light emitting units 20, the plurality of second light emitting units 30, and the plurality of concave portions 41 are arranged concentrically around a predetermined point. The predetermined point is, for example, the center of the substrate 10.

  Below, the detail of each structural member of the light-emitting device 1 is demonstrated.

[substrate]
The substrate 10 is a mounting substrate for mounting the plurality of first LED chips 21 and the plurality of second LED chips 31. The substrate 10 is provided with metal wiring (not shown) for supplying power to the plurality of first LED chips 21 and the plurality of second LED chips 31. The substrate 10 is a ceramic substrate made of ceramic, for example. The substrate 10 may be a resin substrate based on a resin or a glass substrate. Alternatively, the substrate 10 may be a metal base substrate in which a metal plate is covered with an insulating film.

  As the ceramic substrate, an alumina substrate made of aluminum oxide (alumina), an aluminum nitride substrate made of aluminum nitride, or the like is used. As the metal base substrate, for example, an aluminum alloy substrate, an iron alloy substrate, a copper alloy substrate, or the like having an insulating film formed on the surface is used. As the resin substrate, for example, a glass epoxy substrate made of glass fiber and epoxy resin is used.

  As the substrate 10, a white substrate having a high light reflectance (for example, a light reflectance of 90% or more) may be used. By using the white substrate, the light emitted from the first LED chip 21 and the second LED chip 31 can be reflected on the surface of the substrate 10, so that the light extraction efficiency can be increased. For example, as the substrate 10, a white ceramic substrate (white alumina substrate) made of alumina can be used.

  Further, as the substrate 10, a light-transmitting substrate having a high light transmittance may be used. As the light-transmitting substrate, for example, a light-transmitting ceramic substrate made of polycrystalline alumina or aluminum nitride, a transparent glass substrate, a sapphire substrate, or a transparent resin substrate can be used.

  In the present embodiment, the planar view shape of the substrate 10 is a rectangle, but may be other shapes such as a circle or a polygon.

[Light emitting part]
The first light emitting unit 20 and the second light emitting unit 30 are light emitting units (light emitting element arrays) arranged side by side on the substrate 10. In the present embodiment, the light color (first light color) emitted from the first light emitting unit 20 (first light color) and the light color (second light) emitted from the second light emitting unit 30 (second light). Color) are different from each other. Specifically, the color temperature of the light emitted from the first light emitting unit 20 is lower than the color temperature of the light emitted from the second light emitting unit 30. The color temperature of the light emitted from the first light emitting unit 20 is, for example, 3000K or less, and as an example, 2700K. The color temperature of the light emitted by the second light emitting unit 30 is, for example, 5000K or more, and is 6200K as an example. That is, the first light emitting unit 20 emits light bulb color white light, and the second light emitting unit 30 emits daylight color white light.

  In the present embodiment, the first light emitting unit 20 and the second light emitting unit 30 can be independently driven. Specifically, only the first light emitting unit 20 can be turned on, only the second light emitting unit 30 can be turned on, or both the first light emitting unit 20 and the second light emitting unit 30 can be turned on and off. More specifically, the light emission intensity of each of the first light emitting unit 20 and the second light emitting unit 30 can be changed independently, that is, light control is possible. By performing light control of each of the first light emitting unit 20 and the second light emitting unit 30, the intensity of light emitted from the light emitting device 1 can be changed.

  The plurality of first LED chips 21 included in the first light emitting unit 20 is an example of a first light emitting element, and is directly mounted on the substrate 10. The first LED chip 21 is, for example, a gallium nitride-based blue LED chip made of an InGaN-based material and having a center wavelength (emission spectrum peak wavelength) in the range of 430 nm to 480 nm.

  The plurality of second LED chips 31 included in the second light emitting unit 30 is an example of a second light emitting element, and is directly mounted on the substrate 10. In the present embodiment, the second LED chip 31 is a blue LED chip having the same configuration as the first LED chip 21. Note that the second LED chip 31 may be an LED chip different from the first LED chip 21, for example, the emission wavelength may be different.

  In the present embodiment, the plurality of first LED chips 21 and the plurality of second LED chips 31 are arranged in a line substantially in parallel in the x-axis direction. Although not shown in FIGS. 1 to 3, the plurality of first LED chips 21 are all electrically connected so that they can be turned on and off collectively. All of the plurality of second LED chips 31 are also electrically connected so that they can be turned on and off collectively.

  At this time, the plurality of first LED chips 21 for one row are connected to each other by chip-to-chip (chip-to-chip) by bonding wires for power supply (not shown). The same applies to the plurality of second LED chips 31. The bonding wire and the wiring are made of a metal material such as gold (Au), silver (Ag), or copper (Cu), for example.

  Although not shown in FIGS. 1 to 3, on the substrate 10, electrodes for supplying power from the external device to the plurality of first LED chips 21 and power from the external device to the plurality of second LED chips 31 are provided. And an electrode for supplying the electrode are electrically independent of each other. That is, the first LED chip 21 and the second LED chip 31 can be controlled to emit light independently. Thereby, the 1st light emission part 20 and the 2nd light emission part 30 are driven independently.

  The first sealing member 22 is a sealing member that covers the plurality of first LED chips 21. The first sealing member 22 collectively covers one round of the plurality of first LED chips 21 arranged side by side along the circumferential direction. That is, the first sealing member 22 is formed in a line (annular shape) along the circumferential direction. The outer shape of the first sealing member 22 corresponds to the outer shape of the first light emitting unit 20. The first sealing member 22 (first light emitting unit 20) is formed in a donut shape with a semicircular cross-sectional shape.

  The second sealing member 32 is a sealing member that covers the plurality of second LED chips 31. The second sealing member 32 collectively covers one round of the plurality of second LED chips 31 arranged side by side along the circumferential direction. That is, the second sealing member 32 is formed in a line (annular) shape along the circumferential direction. The outer shape of the second sealing member 32 corresponds to the outer shape of the second light emitting unit 30. The second sealing member 32 (second light emitting unit 30) is formed in a donut shape with a semicircular cross section.

  Each of the first sealing member 22 and the second sealing member 32 is configured using, for example, a translucent resin material. As the translucent resin material, for example, a methyl silicone resin is used, but an epoxy resin or a urea resin may be used.

  The 1st sealing member 22 contains the wavelength conversion material which performs wavelength conversion of the light which the some 1st LED chip 21 emits. The second sealing member 32 contains a wavelength conversion material that performs wavelength conversion of light emitted from the plurality of second LED chips 31.

  Specifically, the first sealing member 22 and the second sealing member 32 each contain a yellow phosphor. In the present embodiment, each of the first sealing member 22 and the second sealing member 32 further contains a red phosphor and a green phosphor.

The yellow phosphor is, for example, a YAG (yttrium, aluminum, garnet) phosphor having an emission peak wavelength of 550 nm or more and 570 nm or less. The green phosphor is, for example, a Y ₃ (Al, Ga) ₅ O ₁₂ : Ce ³⁺ phosphor or a Lu ₃ Al ₅ O ₁₂ : Ce ³⁺ phosphor having an emission peak wavelength of 515 nm or more and 550 nm or less. The red phosphor is, for example, a CaAlSiN ₃ : Eu ²⁺ phosphor (CASN phosphor) having an emission peak wavelength of 640 nm or more and 670 nm or less, or a (Sr, Ca) AlSiN ₃ : Eu ²⁺ phosphor (SCASN phosphor). .

  White light is emitted as synthesized light (mixed light) of blue light emitted from the first LED chip 21 or the second LED chip 31 and yellow light, red light and green light emitted from various phosphors. The light color (color temperature) of white light is adjusted by the content of the phosphor contained in the sealing member.

  Specifically, the content of the red phosphor and the green phosphor contained in the first sealing member 22 is larger than the content of the red phosphor and the green phosphor contained in the second sealing member 32. As a result, the first light emitting unit 20 and the second light emitting unit 30 have different light colors (color temperatures). That is, the first light emitting unit 20 emits low color temperature light, and the second light emitting unit 30 emits high color temperature light.

  In the present embodiment, the first sealing member 22 and the second sealing member 32 contain the same type of phosphor, and the contents thereof are different, so that the first light emitting unit 20 and the second light emitting are emitted. Although the emission color of the unit 30 is varied, the present invention is not limited to this. The type and number of wavelength conversion materials included in the first sealing member 22 and the type and number of wavelength conversion materials included in the second sealing member 32 may be different from each other. For example, the 2nd sealing member 32 contains yellow fluorescent substance and green fluorescent substance, and does not need to contain red fluorescent substance.

[Optical member]
The optical member 40 is a translucent member disposed so as to sandwich the first light emitting unit 20 and the second light emitting unit 30 with the substrate 10. The optical member 40 has a main surface 40a and a main surface 40b facing each other. The main surface 40a is a surface facing the substrate 10 and is a surface on which light from the light emitting unit is incident. The main surface 40b is a surface opposite to the substrate 10 and is a light emitting surface from which light incident on the optical member 40 is emitted to the outside.

  The optical member 40 has a plurality of recesses 41. The plurality of recesses 41 are provided on the main surface 40 a of the optical member 40 on the substrate 10 side. The plurality of recesses 41 are provided in a one-to-one correspondence between the first light emitting unit 20 and the second light emitting unit 30. Specifically, in the cross section shown in FIG. 3, there are seven locations between the first light emitting unit 20 and the second light emitting unit 30. Actually, since the first light emitting unit 20 and the second light emitting unit 30 are provided concentrically, there are four locations between the first light emitting unit 20 and the second light emitting unit 30 (one center and left and right). 3 places). The plurality of recesses 41 are formed concentrically in accordance with the shapes of the first light emitting unit 20 and the second light emitting unit 30. The recess 41 is, for example, a donut-shaped recess having a substantially semicircular cross-sectional shape.

  Specifically, the recess 41 overlaps both the first light emitting unit 20 and the second light emitting unit 30 in plan view and overlaps at least one part of the first light emitting unit 20 and the second light emitting unit 30. It is provided so as not to become. That is, the recess 41 does not completely cover both the first light emitting unit 20 and the second light emitting unit 30. In plan view, at least one of the first light emitting unit 20 and the second light emitting unit 30 is located at a position protruding from the recess 41.

  The concave portion 41 is a lens portion of the optical member 40. The inner surface 43 of the recess 41 is an incident surface curved into a predetermined shape on which light emitted from the first light emitting unit 20 and light emitted from the second light emitting unit 30 are incident. Specifically, as shown in FIG. 3, the recess 41 is formed in a substantially annular shape in a plan view, and the cross-sectional shape orthogonal to the circumferential direction is a substantially semicircular shape, but is not limited thereto.

  FIG. 4 is a partially enlarged cross-sectional view of the light emitting device 1 according to the present embodiment. Specifically, FIG. 4 is an enlarged view of a portion including the first light emitting unit 20 and the second light emitting unit 30 in the cross section shown in FIG.

  In the present embodiment, as shown in FIG. 4, the open end portions 42 of the adjacent recesses 41 are arranged close to each other so as to form a pointed protrusion. The open end 42 (projection) is formed concentrically in a plan view. In the present embodiment, the opening end 42 of the recess 41 is within the first range R1 centered on the optical axis J1 of the first light emitting unit 20 in the arrangement direction (radial direction, for example, the x-axis direction) of the light emitting units. The second light emitting unit 30 is located within the second range R2 centered on the optical axis J2.

  In the cross section (xz cross section) shown in FIG. 4, the angle formed by the optical axis J1 of the first light emitting unit 20 from the center point (point on the optical axis J1) of the upper surface of the first LED chip 21 is 45 °. Intersections between the two straight lines P1a and P1b drawn in the left-right direction and the outer surface of the first light emitting unit 20 (first sealing member 22) are defined as Q1a and Q1b. At this time, the first range R1 is between a line S1a perpendicular to the substrate 10 passing through the point Q1a and a line S1b perpendicular to the substrate 10 passing through the point Q1b.

  Similarly, in the cross section shown in FIG. 4 (xz cross section), the angle formed by the optical axis J2 of the second light emitting unit 30 from the center point (point on the optical axis J2) of the upper surface of the second LED chip 31 is 45 °. Let Q2a and Q2b be the intersections of the two straight lines P2a and P2b drawn in the left-right direction and the outer surface of the second light emitting unit 30 (second sealing member 32). At this time, the second range R2 is between a line S2a perpendicular to the substrate 10 passing through the point Q2a and a line S2b perpendicular to the substrate 10 passing through the point Q2b.

  In the present embodiment, the opening end 42 of the recess 41 is located in the direction directly above the first LED chip 21 and in the direction directly above the second LED chip 31. For example, as shown in FIG. 4, the open end 42 of the recess 41 is located on the optical axis J1 and the optical axis J2.

  In the present embodiment, the width of the recess 41 (the distance between the opening end portions 42 in a sectional view) is the distance between the adjacent first light emitting unit 20 and the second light emitting unit 30 (between the optical axes J1 and J2). Approximately equal to the distance). The plurality of recesses 41 are arranged at a position shifted by 1/2 pitch from a state where the center of the recess 41 and the optical axis of the first light emitting unit 20 or the second light emitting unit 30 coincide.

  In FIG. 4, the plurality of concave portions 41 are continuously arranged and the tip of the opening end 42 is shown to have a sharp shape, but the tip may be a flat surface or a curved surface (round surface). Since the tip of the open end 42 has a predetermined width, damage to the recess 41 can be suppressed. In addition, the width | variety of the front-end | tip of the opening edge part 42 is smaller than the width | variety of the recessed part 41, for example, is smaller than the width | variety of a LED chip.

  Further, the opening end 42 is disposed in proximity to each of the first light emitting unit 20 and the second light emitting unit 30. Specifically, when the distance from the opening end 42 to the substrate 10 is H, and the heights of the first light emitting unit 20 and the second light emitting unit 30 are h, the opening end 42 has an H of 2 It is located in a range that is less than double. In addition, although the height of the 1st light emission part 20 and the 2nd light emission part 30 is equally h here, it is not restricted to this. When the heights of the first light emitting unit 20 and the second light emitting unit 30 are different, for example, the lower height may be set to h.

[Path of light emitted from the light emitting unit]
Here, the path | route of the light radiate | emitted from the light-emitting device 1 which concerns on this Embodiment is demonstrated using FIG. FIG. 5 is a cross-sectional view schematically showing light emitted from the light emitting device 1 according to the present embodiment. In FIG. 5, the light path is indicated by solid and broken arrows, and the cross-section of the optical member 40 shown in FIG. 4 is shown for easy understanding of the path in the optical member 40. Absent. Here, the light from the 1st light emission part 20 and the 2nd light emission part 30 which are located near the center of the board | substrate 10 is demonstrated.

  In the present embodiment, the opening end 42 of the recess 41 is located on the optical axis J1 of the first light emitting unit 20. For this reason, the light emitted from the first light emitting unit 20 enters the optical member 40 from the inner surfaces 43 of the two adjacent recesses 41.

  For example, the light L1a shown in FIG. 5 is incident at a large incident angle on the inner surface 43 of the concave portion 41 on the left side of the optical axis J1, so that part of the light is reflected and the reflected light enters the optical member 40 from the inner surface 43. To do. The light L1a travels through the optical member 40 and then exits from the main surface 40b. Similarly, since the light L1b is incident on the inner surface 43 of the concave portion 41 on the right side of the optical axis J1 at a large incident angle, a part of the light is reflected and the reflected light enters the optical member 40 from the inner surface 43. The light L1b travels through the optical member 40 and is then emitted to the outside from the main surface 40b.

  Similarly, the opening end 42 of the recess 41 is located on the optical axis J2 of the second light emitting unit 30. For this reason, the light emitted from the second light emitting unit 30 enters the optical member 40 from the inner surfaces 43 of the two adjacent recesses 41.

  For example, the light L2a shown in FIG. 5 is incident on the inner surface 43 of the concave portion 41 on the left side of the optical axis J2 at a large incident angle, so that part of the light is reflected and the reflected light enters the optical member 40 from the inner surface 43. To do. The light L2a travels through the optical member 40 and is then emitted to the outside from the main surface 40b. Similarly, the light L2b is incident on the inner surface 43 of the concave portion 41 on the right side of the optical axis J2 at a large incident angle, so that part of the light is reflected and the reflected light enters the optical member 40 from the inner surface 43. The light L2b travels through the optical member 40 and is then emitted to the outside from the main surface 40b.

  As shown in FIG. 5, the light L1a and the light L1b are light emitted from one first light emitting unit 20, but are divided into left and right parts and emitted. Similarly, the light L2a and the light L2b are light emitted from one second light emitting unit 30, but are divided into left and right parts and emitted. Similarly, the light from the other first light emitting units 20 and the second light emitting units 30 is also divided into left and right and emitted. 5 shows light that is once reflected by the inner surface 43 and then enters the optical member 40. However, light that is directly incident on the inner surface 43 also exists. For this reason, the light from each of the plurality of first light emitting units 20 and the plurality of second light emitting units 30 is easily mixed with each other, and color unevenness on the emission surface (main surface 40b) can be suppressed.

[Effects, etc.]
As described above, the light emitting device 1 according to the present embodiment includes the substrate 10, the first light emitting unit 20 that is arranged side by side on the substrate 10 and emits the first light of the first light color, and the first light emitting device 1. A second light emitting unit 30 that emits a second light of a second light color different from the light color, and a translucency disposed so as to sandwich the first light emitting unit 20 and the second light emitting unit 30 between the substrate 10 and the second light emitting unit 30. The optical member 40 overlaps both the first light emitting unit 20 and the second light emitting unit 30 in a plan view, and is at least one of the first light emitting unit 20 and the second light emitting unit 30. It has the recessed part 41 provided so that it might not overlap with a part.

  As a result, light from both the first light emitting unit 20 and the second light emitting unit 30 adjacent to each other enters one concave portion 41 of the optical member 40. Further, at least one of the first light emitting unit 20 and the second light emitting unit 30 emits light so as not to enter the one concave portion 41 (specifically, toward the adjacent concave portion 41). Reflection and refraction by the inner surface 43 of the recess 41 causes light from one light emitting part to be emitted in a significantly different direction, so that it can be easily mixed with light from other light emitting parts, and color unevenness can be suppressed. .

  For example, the light emitting device 1 includes a plurality of at least one of the first light emitting unit 20 and the second light emitting unit 30, and the first light emitting unit 20 and the second light emitting unit 30 are alternately arranged on the substrate 10. The concave portions 41 are provided in a one-to-one correspondence between the first light emitting unit 20 and the second light emitting unit 30.

  Thereby, since the recessed part 41 is provided between each light emission part, since the light from each light emission part is radiate | emitted in a different direction by reflection and refraction | bending by the inner surface 43 of the recessed part 41, it is from several light emission parts. Light is effectively dispersed and emitted from the main surface 40b. Therefore, the occurrence of uneven color can be further suppressed.

  Further, for example, the opening end portions 42 of the adjacent concave portions 41 are arranged close to each other so as to form a pointed protrusion.

  Thereby, when the optical member 40 is viewed from the light emitting portion (substrate 10) side, the area of the opening end portion 42 is reduced, so that the amount of light incident on the inner surface 43 of the concave portion 41 can be increased. Therefore, the light extraction efficiency can be increased and the occurrence of color unevenness can be suppressed.

  For example, the 1st light emission part 20, the 2nd light emission part 30, and the recessed part 41 are arrange | positioned along the some mutually substantially parallel line. For example, the 1st light emission part 20, the 2nd light emission part 30, and the recessed part 41 are arrange | positioned along the some annular ring which makes a predetermined point a common center.

  Thereby, since the light emission part is arrange | positioned at substantially annular shape, substantially equal light can be radiate | emitted with respect to all the directions. Therefore, the occurrence of uneven color and the occurrence of uneven brightness can be suppressed.

  Further, for example, the first light emitting unit 20 includes a plurality of first LED chips 21 mounted on the substrate 10 and a first sealing member 22 that covers the plurality of first LED chips 21, and the second light emitting unit 30 includes The plurality of second LED chips 31 mounted on the substrate 10 and the second sealing member 32 covering the plurality of second LED chips 31 are included.

  Thereby, the light emission color of the 1st light emission part 20 and the 2nd light emission part 30 can be easily varied by changing wavelength conversion materials, such as fluorescent substance contained in a sealing member. Further, since the LED chip is covered with the sealing member, the LED chip, the bonding wire, and the like can be protected from dust, moisture, external force, and the like.

  For example, the recess 41 is provided on the main surface 40a of the optical member 40 on the substrate 10 side, and light emitted from the first light emitting unit 20 and light emitted from the second light emitting unit 30 are incident on the inner surface 43 of the recess 41. A curved incident surface.

  Thereby, the recessed part 41 is provided in the main surface 40a by the side of the board | substrate 10, and is located in the position close | similar to a light emission part. For this reason, the light from a light emission part can be disperse | distributed efficiently, and generation | occurrence | production of color unevenness can be suppressed. Moreover, since the recessed part 41 is not exposed to the light emission side (namely, the exterior), it is hard to apply the force from the outside, and generation | occurrence | production of the damage of the recessed part 41 etc. can be suppressed.

  In addition, for example, the opening end 42 of the recess 41 is within the first range R1 centered on the optical axis J1 of the first light emitting unit 20 in the direction in which the first light emitting unit 20 and the second light emitting unit 30 are arranged, and The second light emitting unit 30 is located within the second range R2 centered on the optical axis J2.

  Thereby, since the light from a light emission part can be divided | segmented substantially by half, light can be disperse | distributed substantially symmetrically. Therefore, the occurrence of color unevenness can be suppressed.

  Further, for example, the opening end 42 of the recess 41 is located on the optical axis J1 of the first light emitting unit 20 and on the optical axis J2 of the second light emitting unit 30.

  Thereby, since the light from a light emission part can be divided | segmented by half, light can be disperse | distributed symmetrically. Therefore, the occurrence of uneven color can be further suppressed.

(Embodiment 2)
Next, the second embodiment will be described.

  In the first embodiment, an example in which a plurality of concave portions 41 are provided on the main surface 40a of the optical member 40 on the substrate 10 side has been described. On the other hand, in the light emitting device according to the present embodiment, a convex portion is provided on the main surface on the light emitting side of the optical member. Below, it demonstrates centering on difference with Embodiment 1, and abbreviate | omits or simplifies description of a common point.

  FIG. 6 is a cross-sectional view of the light emitting device 101 according to this embodiment. As shown in FIG. 6, the light emitting device 101 according to the present embodiment is provided with an optical member 140 instead of the optical member 40 as compared with the light emitting device 1 according to the first embodiment, and is newly translucent. The difference is that the member 150 is provided.

  Although not shown, in the present embodiment, the two first light emitting units 20 and the two second light emitting units 30 are arranged concentrically with the center of the substrate 10 as a common center. The two first light emitting units 20 and the two second light emitting units 30 are alternately arranged one by one from the center of the substrate 10 toward the periphery.

[Optical member]
The optical member 140 is a translucent member disposed so as to sandwich the first light emitting unit 20 and the second light emitting unit 30 with the substrate 10. The optical member 140 has a main surface 140a and a main surface 140b facing each other. The main surface 140a is a surface facing the substrate 10 and is an incident surface on which light from the light emitting unit is incident. The main surface 140b is a surface opposite to the substrate 10, and is a surface from which light incident on the optical member 140 is emitted to the outside.

  The optical member 140 has a plurality of convex portions 141. The plurality of convex portions 141 are provided on the main surface 140 b of the optical member 140 on the side opposite to the substrate 10. The plurality of convex portions 141 are provided in a one-to-one correspondence between the first light emitting unit 20 and the second light emitting unit 30. Specifically, in the cross section shown in FIG. 6, there are seven locations between the first light emitting unit 20 and the second light emitting unit 30. Actually, since the first light emitting unit 20 and the second light emitting unit 30 are provided concentrically, there are four locations between the first light emitting unit 20 and the second light emitting unit 30 (one center and left and right). 3 places). The plurality of convex portions 141 are concentrically formed in accordance with the shapes of the first light emitting unit 20 and the second light emitting unit 30. The convex portion 141 is, for example, a donut-shaped convex portion having a substantially semicircular cross section.

  Specifically, the convex portion 141 overlaps both the first light emitting unit 20 and the second light emitting unit 30 in a plan view, and a part of at least one of the first light emitting unit 20 and the second light emitting unit 30. It is provided not to overlap. That is, the convex portion 141 does not completely cover both the first light emitting unit 20 and the second light emitting unit 30. In plan view, at least one of the first light emitting unit 20 and the second light emitting unit 30 is located at a position protruding from the convex portion 141.

  The convex portion 141 is a lens portion of the optical member 140. The outer surface 143 of the convex portion 141 is an incident surface curved into a predetermined shape that emits the light emitted from the first light emitting unit 20 and the light emitted from the second light emitting unit 30 and having passed through the optical member 140. is there. Specifically, as shown in FIG. 6, the convex portion 141 is formed in a substantially annular shape in a plan view, and the cross-sectional shape orthogonal to the circumferential direction is a substantially semicircular shape, but is not limited thereto.

  In the present embodiment, peripheral end portions 142 of adjacent convex portions 141 are arranged close to each other so as to form a pointed groove. The peripheral end 142 (pointed groove) is formed concentrically in a plan view. In the present embodiment, the peripheral end 142 of the convex portion 141 is within the first range R1 centered on the optical axis J1 of the first light emitting unit 20 in the arrangement direction (radial direction, for example, the x-axis direction) of the light emitting units. And within the second range R2 centered on the optical axis J2 of the second light emitting unit 30. The first range R1 and the second range R2 are as shown in FIG.

  In the present embodiment, the peripheral end portion 142 of the convex portion 141 is located in the direction directly above the first LED chip 21 and the direction directly above the second LED chip 31. For example, the peripheral end 142 of the convex 141 is located on the optical axis J1 and the optical axis J2.

  In the present embodiment, the width of the convex portion 141 (the distance between the peripheral end portions 142 in a sectional view) is the distance between the adjacent first light emitting portion 20 and the second light emitting portion 30 (between the optical axes J1 and J2). Is approximately equal to the distance). The plurality of convex portions 141 are arranged at positions shifted by ½ pitch from the state in which the center of the convex portion 141 coincides with the optical axis of the first light emitting unit 20 or the second light emitting unit 30.

  In FIG. 6, the plurality of convex portions 141 are continuously arranged and the bottom of the peripheral end portion 142 is shown to have a sharp shape, but the bottom may be a flat surface or a curved surface (round surface). . Note that the width of the bottom of the peripheral end 142 is smaller than the width of the convex 141, for example, smaller than the width of the LED chip.

[Translucent member]
The translucent member 150 is a member that fills the space between the optical member 140 and the first light emitting unit 20 and the second light emitting unit 30. The translucent member 150 is formed using, for example, a translucent resin material. As the translucent resin material, for example, a methyl silicone resin is used, but an epoxy resin or a urea resin may be used. The refractive index of the translucent member 150 is substantially equal to the refractive index of the optical member 140 and the refractive indexes of the first sealing member 22 and the second sealing member 32, for example. Thereby, the light emitted from the light emitting unit can be efficiently incident on the optical member 140, and the light extraction efficiency can be increased.

[Path of light emitted from the light emitting unit]
Here, a path of light emitted from the light emitting device 101 according to the present embodiment will be described with reference to FIG. FIG. 7 is a cross-sectional view schematically showing light emitted from the light emitting device 101 according to the present embodiment. In FIG. 7, the light path is indicated by solid and dashed arrows, and the optical member 140 and the translucent member 150 are shown in FIG. The shaded area is not shown. Here, the light from the 1st light emission part 20 and the 2nd light emission part 30 which are located near the center of the board | substrate 10 is demonstrated.

  In the present embodiment, the peripheral end portion 142 of the convex portion 141 is located on the optical axis J1 of the first light emitting unit 20. For this reason, the light that has been emitted from the first light emitting unit 20 and traveled through the optical member 140 is emitted from the outer surfaces 143 of the two adjacent convex portions 141.

  For example, the light L1a shown in FIG. 7 is incident on the outer surface 143 of the convex portion 141 on the left side of the optical axis J1 at a large incident angle, so that part of the light is reflected and the reflected light is emitted from the outer surface 143 to the outside. The Similarly, the light L1b is incident at a large incident angle on the outer surface 143 of the convex portion 141 on the right side of the optical axis J1, so that a part of the light is reflected and the reflected light is emitted from the outer surface 143.

  Similarly, the peripheral end portion 142 of the convex portion 141 is located on the optical axis J2 of the second light emitting unit 30. For this reason, the light that has been emitted from the second light emitting unit 30 and traveled through the optical member 140 is emitted from the outer surface 143 of the two adjacent convex portions 141.

  For example, the light L2a shown in FIG. 7 is incident at a large incident angle on the outer surface 143 of the convex portion 141 on the left side of the optical axis J2, so that part of the light is reflected and the reflected light is emitted from the outer surface 143. Similarly, the light L2b is incident at a large incident angle with respect to the outer surface 143 of the convex portion 141 on the right side of the optical axis J2, so that part of the light is reflected and the reflected light is emitted from the outer surface 143.

  As illustrated in FIG. 7, the light L1a and the light L1b are light emitted from one first light emitting unit 20, but are divided into left and right parts and emitted. Similarly, the light L2a and the light L2b are light emitted from one second light emitting unit 30, but are divided into left and right parts and emitted. Similarly, the light from the other first light emitting units 20 and the second light emitting units 30 is also divided into left and right and emitted. Further, FIG. 7 shows light that is once reflected by the outer surface 143 and then emitted to the outside, but there is also light that is emitted directly from the outer surface 143. For this reason, the light from each of the plurality of first light emitting units 20 and the plurality of second light emitting units 30 is easily mixed with each other, and color unevenness can be suppressed.

  In the present embodiment, a translucent member 150 is provided between the optical member 140 and the first light emitting unit 20 and the second light emitting unit 30. For this reason, the light emitted from each of the first light emitting unit 20 and the second light emitting unit 30 reaches the outer surface 143 of the convex portion 141 with almost no refraction and reflection by the main surface 140a of the optical member 140.

[Effects, etc.]
As described above, in the light emitting device 101 according to the present embodiment, for example, the convex portion 141 is provided on the main surface 140b of the optical member 140 on the side opposite to the substrate 10, and the outer surface 143 of the convex portion 141 is provided. Is an exit surface that emits light transmitted through the optical member 140 and is curved into a predetermined shape.

  Thereby, the light from the light emitting portion can be efficiently dispersed by the plurality of convex portions 141, and the occurrence of color unevenness can be suppressed. In addition, since the optical member 140 is not provided with a sharp protrusion or the like, it is possible to suppress the occurrence of damage due to an external force.

  For example, the light emitting device 101 includes an optical member 140 and a light transmissive member 150 that fills a space between the first light emitting unit 20 and the second light emitting unit 30.

  Thereby, the refraction and reflection of light on the incident surface (main surface 140a) of the translucent member 150 can be reduced, and the light extraction efficiency can be increased.

(Modification)
Here, modified examples of the first and second embodiments will be described.

  In Embodiments 1 and 2, an example in which a plurality of first light emitting units 20, a plurality of second light emitting units 30, a plurality of concave portions 41, or a plurality of convex portions 141 are formed concentrically has been described. On the other hand, in the light emitting device according to this modification, the shapes in plan view are different.

  FIG. 8 is a plan view of the light emitting device 201 according to this modification. In FIG. 8, as in FIG. 2, the entire optical member 240 is not shown, but the position of the opening end (pointed portion) 242 of the recess 241 of the optical member 240 is indicated by a broken line. A space between two adjacent broken lines corresponds to the concave portion 241.

  Compared with the light emitting device 1 according to the first embodiment, the light emitting device 201 according to the present modification has a first light emitting unit 220, a first light emitting unit 220, a second light emitting unit 30, and an optical member 40 instead of the first light emitting unit 20, the second light emitting unit 30, and the optical member 40. The point provided with the 2 light emission part 230 and the optical member 240 is different. In the present modification, the first light emitting unit 220, the second light emitting unit 230, and the concave shape 241 (opening end 242) of the optical member 240 have the planar shape of the first light emitting unit 20, the second light emitting unit according to the first embodiment. This is different from the concave portion 41 (opening end portion 242) of the portion 30 and the optical member 40.

  Specifically, as shown in FIG. 8, the first light emitting unit 220, the second light emitting unit 230, and the recess 241 (opening end 242) are each along a plurality of polygonal rings having a predetermined center as a common center. Are arranged. The predetermined point is, for example, the center of the substrate 10. Specifically, the 1st light emission part 220, the 2nd light emission part 230, and the recessed part 241 are formed in concentric polygonal shape.

  In this modification, the polygon is a substantially square. That is, each of the first light emitting unit 220, the second light emitting unit 230, and the recess 241 is formed in an annular shape along a substantially square side. The polygon may be a substantially regular hexagon or a substantially regular octagon. The polygon may be a substantially rectangular shape.

  In the light emitting device 201 according to this modification, the cross-sectional shape taken along line III-III shown in FIG. 8 is substantially the same as the cross-sectional shape of the light emitting device 1 shown in FIG. That is, the plurality of recesses 241 are provided in a one-to-one correspondence between the first light emitting unit 220 and the second light emitting unit 230. The opening end 242 is located on the optical axis J1 of the first light emitting unit 220 and on the optical axis J2 of the second light emitting unit 230, for example.

  As described above, in the light emitting device 201 according to this modification, the first light emitting unit 20, the second light emitting unit 30, and the recess 241 are along a plurality of polygonal rings having a predetermined center as a common center. Has been placed.

  Thereby, similarly to the first embodiment, the occurrence of color unevenness can be suppressed. Moreover, since the 1st light emission part 220 and the 2nd light emission part 230 are arrange | positioned at substantially polygonal ring shape, an LED chip can be mounted with the same attitude | position for every edge | side. For this reason, the frequency | count of changing the mounting direction of a LED chip can be reduced compared with the case where it mounts in an annular | circular shape, for example. Therefore, the occurrence of errors in the arrangement and orientation of the LED chips can be reduced, the yield can be improved, and the light-emitting device 201 with high reliability can be realized.

(Embodiment 3)
Next, the lighting apparatus according to Embodiment 3 will be described with reference to FIGS. FIG. 9 is a cross-sectional view of lighting apparatus 300 according to the present embodiment. FIG. 10 is an external perspective view of lighting device 300 and its peripheral members according to the present embodiment.

  As shown in FIGS. 9 and 10, lighting device 300 according to the present embodiment is arranged to be embedded in a ceiling of a house, for example, so that light is directed downward (floor surface or wall). It is an embedded illumination device such as an outgoing downlight.

  The lighting device 300 includes the light emitting device 1. The illumination device 300 further includes a substantially bottomed tubular instrument body configured by combining the base 310 and the frame body part 320, and a reflector 330 and a translucent panel 340 disposed in the instrument body. Is provided.

  The base 310 is a mounting base to which the light emitting device 1 is attached. The base 310 also functions as a heat sink (heat radiator) that dissipates heat generated by the light emitting device 1. The base 310 is formed in a substantially bottomed cylindrical shape using a metal material, and is made of, for example, aluminum die casting.

  A plurality of radiating fins 311 projecting upward are provided on the upper portion (ceiling side portion) of the base portion 310 at a predetermined interval along one direction. Thereby, the heat which the light-emitting device 1 generate | occur | produces can be dissipated efficiently.

  The frame body 320 includes a substantially cylindrical (funnel-shaped) auxiliary reflecting member 321 having a reflecting surface on the inner surface, and a frame body main body 322 to which the auxiliary reflecting member 321 is attached. The auxiliary reflecting member 321 is formed using a metal material, and is formed, for example, by drawing or press forming an aluminum alloy or the like. The frame body portion 320 is fixed by attaching the frame body main body portion 322 to the base portion 310 with attachment screws (not shown) or the like.

  The reflection plate 330 is a substantially cylindrical (funnel-shaped) reflection member having an internal reflection function. The reflection plate 330 is formed using a metal material such as aluminum. Alternatively, the reflecting plate 330 may be formed using a hard white resin material.

  The translucent panel 340 is a translucent member having light diffusibility and translucency. The translucent panel 340 is a flat plate disposed between the reflecting plate 330 and the frame body part 320, and is attached to the reflecting plate 330. The translucent panel 340 is formed in a disk shape using a transparent resin material such as acrylic (PMMA) and polycarbonate (PC).

  Note that the lighting device 300 may not include the translucent panel 340. When the translucent panel 340 is not provided, the luminous flux of light emitted from the lighting device 300 can be improved.

  As illustrated in FIG. 10, the lighting device 300 includes a lighting device 350 that supplies power to the light emitting device 1 for lighting the light emitting device 1, and alternating current power from an external power source such as a commercial power source. And a terminal block 360 that relays to the terminal. Specifically, the lighting device 350 converts AC power relayed from the terminal block 360 into DC power, and supplies the converted DC power to the light emitting device 1.

  The lighting device 350 and the terminal block 360 are fixed to a mounting plate 370 provided separately from the instrument body. The mounting plate 370 is formed by bending a rectangular plate member made of a metal material. The lighting device 350 is fixed to the lower surface of one end of the mounting plate 370 in the longitudinal direction, and the terminal block 360 is fixed to the lower surface of the other end. The mounting plate 370 is connected to a top plate 380 fixed to the top of the base 310 of the instrument body.

  As described above, the illumination device 300 according to the present embodiment includes, for example, the light emitting device 1 and the lighting device 350 that supplies the light emitting device 1 with power for lighting the light emitting device 1.

  Thereby, since the illuminating device 300 is equipped with the light-emitting device 1, the fall of luminous efficiency can be suppressed and generation | occurrence | production of unevenness of color and brightness | luminance can be suppressed.

  In the present embodiment, lighting device 300 may include either light-emitting device 101 according to Embodiment 2 or light-emitting device 201 according to a modified example, instead of light-emitting device 1. Also in this case, the occurrence of color unevenness can be suppressed as in the second embodiment and the modification.

  In the present embodiment, an example of the downlight is shown as the lighting device 300, but the configuration of the downlight is not limited to the illustrated example. Further, the present invention is not limited to downlights, and may be realized as other illumination devices such as spotlights and ceiling lights.

(Other)
As described above, the light-emitting device and the lighting device according to the present invention have been described based on the above-described embodiment and modifications thereof, but the present invention is not limited to the above-described embodiment.

  For example, in the above embodiment, the example in which the first light emitting unit 20 emits low color temperature light and the second light emitting unit 30 emits high color temperature light has been described, but the present invention is not limited thereto. The first light emitting unit 20 may emit high color temperature light, and the second light emitting unit 30 may emit low color temperature light.

  Further, for example, in the above-described embodiment, the first light emitting unit 20 and the second light emitting unit 20 are different from each other in the first sealing member 22 and the second sealing member 32 by changing the types and contents of the phosphors contained therein. Although the light color of the light emitting unit 30 is varied, the present invention is not limited to this. For example, the type or number of the first LED chip 21 and the second LED chip 31 may be different. For example, the plurality of first LED chips 21 included in the first light emitting unit 20 may include not only a blue LED chip but also a red LED chip.

  Further, for example, in the above-described embodiment, the example in which the first light emitting unit 20 and the second light emitting unit 30 are arranged with a gap therebetween is shown. However, the first light emitting unit 20 and the second light emitting unit 30 are It may be in contact. In this case, for example, when the width of the first light emitting unit 20 (the length in the radial direction) and the width of the second light emitting unit 30 are equal, the width of the concave portion 41 or the convex portion 141 can also be made equal.

  Further, for example, in the above-described embodiment, each of the first light emitting unit 20, the second light emitting unit 30, and the concave portion 41 or the convex portion 141 is illustrated as being annular, but for example, is arranged linearly. May be.

  In this case, since the LED chip can be mounted along one direction, the LED chip can be mounted easily. Specifically, since all LED chips can be mounted in the same posture (orientation), the occurrence of errors in the posture (orientation) of the mounted LED chips can be reduced. Moreover, when forming a sealing member by apply | coating a resin material in a line form with a dispenser etc., application | coating of a resin material can be performed easily. Therefore, it becomes easy to form a uniformly shaped sealing member. In addition, the optical member can be easily aligned. Therefore, a yield can be improved and a highly reliable light-emitting device can be realized.

  In addition, each of the 1st light emission part 20, the 2nd light emission part 30, and the recessed part 41 or the convex part 141 may be arrange | positioned at dot shape, for example.

  For example, in the above-described embodiment, an LED chip is shown as an example of a light-emitting element included in the light-emitting device, but the present invention is not limited to this. The light emitting element may be a semiconductor light emitting element such as a semiconductor laser, or another solid light emitting element such as an organic EL (Electroluminescence) or an inorganic EL.

  In addition, it is realized by arbitrarily combining the components and functions in each embodiment without departing from the scope of the present invention, and forms obtained by making various modifications conceived by those skilled in the art to each embodiment. Forms are also included in the present invention.

1, 101, 201 Light-emitting device 10 Substrate 20, 220 First light-emitting portion 21 First LED chip (first light-emitting element)
22 1st sealing members 30 and 230 2nd light emission part 31 2nd LED chip (2nd light emitting element)
32 Second sealing member 40, 140, 240 Optical member 41, 241 Recess 42, 242 Open end 43 Inner surface 141 Convex portion 142 Peripheral end 143 Outer surface 150 Translucent member 300 Illuminating device 350 Lighting device

Claims (12)

A substrate,
A first light emitting unit that emits first light of a first light color, and a second light emitting unit that emits second light of a second light color different from the first light color, arranged side by side on the substrate; ,
A translucent optical member disposed so as to sandwich the first light emitting unit and the second light emitting unit with the substrate;
The optical member is provided so as to overlap with both the first light emitting unit and the second light emitting unit in a plan view and not to overlap with at least one part of the first light emitting unit and the second light emitting unit. A light emitting device having a concave or convex portion. The light emitting device includes a plurality of at least one of the first light emitting unit and the second light emitting unit,
The first light emitting unit and the second light emitting unit are alternately arranged on the substrate,
The light-emitting device according to claim 1, wherein a plurality of the concave portions or the convex portions are provided in a one-to-one correspondence between the first light-emitting portion and the second light-emitting portion. The light emitting device according to claim 2, wherein the opening end portions of the adjacent concave portions or the peripheral end portions of the adjacent convex portions are arranged close to each other so as to form a pointed protrusion or groove. apparatus. The said 1st light emission part, the said 2nd light emission part, and the said recessed part or the said convex part are arrange | positioned along the some substantially parallel line. Light emitting device. The first light emitting unit, the second light emitting unit, and the concave portion or the convex portion are arranged along a plurality of circular rings or a plurality of polygonal rings having a predetermined center as a common center. The light-emitting device of any one of 1-4. The first light emitting unit includes a plurality of first light emitting elements mounted on the substrate, and a first sealing member that covers the plurality of first light emitting elements,
The said 2nd light emission part has a some 2nd light emitting element mounted in the said board | substrate, and the 2nd sealing member which covers a said some 2nd light emitting element. Light-emitting device. The recess is provided on a surface of the optical member on the substrate side,
The light emitting device according to claim 1, wherein an inner surface of the concave portion is a curved incident surface on which the first light and the second light are incident. The convex portion is provided on a surface of the optical member opposite to the substrate,
The light emitting device according to any one of claims 1 to 6, wherein an outer surface of the convex portion is a curved emission surface that emits the first light and the second light transmitted through the optical member. further,
The light-emitting device according to claim 8, comprising: the optical member; and a light-transmitting member that fills a space between the first light-emitting unit and the second light-emitting unit. The opening end portion of the concave portion or the peripheral end portion of the convex portion is within a first range centered on the optical axis of the first light emitting portion in the arrangement direction of the first light emitting portion and the second light emitting portion, and The light-emitting device according to claim 1, wherein the light-emitting device is located within a second range centered on the optical axis of the second light-emitting unit. The light emitting device according to claim 10, wherein an opening end portion of the concave portion or a peripheral end portion of the convex portion is located on each optical axis of the first light emitting portion and the second light emitting portion. The light emitting device according to any one of claims 1 to 11,
A lighting device comprising: a lighting device that supplies power for lighting the light emitting device to the light emitting device.

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