Light source and light emitting module

Abstract

To provide a light source and a light emitting module, capable of suppressing uneven luminescence of light emitted from the light source.SOLUTION: A light source includes a plurality of light emitting elements, a light blocking member, and a plurality of light-transmissive members. The light-transmissive members are arranged such that upper surfaces thereof are located on the same plane, and include a plurality of first light-transmissive members and a plurality of second light-transmissive members. The plurality of first light-transmissive members are arranged to be rectangular as a whole. The light emitting elements are respectively arranged under the first light-transmissive members. The plurality of second light-transmissive members are arranged to be rectangular as a whole, so as to surround the first light-transmissive members. The light emitting elements are not arranged under the respective second light-transmissive members. A width of each second light-transmissive member in an arrangement direction from the first light-transmissive member arranged adjacent thereto is different from a width of the first light-transmissive member arranged adjacent thereto in an arrangement direction.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present disclosure relates to a light source and a light emitting module. [Background technology]

[0002] In recent years, light sources in which multiple light-emitting elements are arranged two-dimensionally have become popular in display devices, lighting devices, flashlights, etc. Such a light source is used in various fields. By changing the irradiation area, partial irradiation is possible. discloses a light source that can be used in a variable light distribution type headlamp of a vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-219637 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure aims to provide a light source and a light emitting module that have excellent light emitting characteristics during partial illumination. The purpose is to [Means for solving the problem]

[0005] The light source of the present disclosure comprises: A plurality of light-emitting elements; The upper surfaces of the plurality of light emitting elements are exposed, and the spaces between the plurality of light emitting elements and the plurality of light emitting elements are exposed. a light-shielding member disposed on the outer periphery of the entire light-emitting element and holding the plurality of light-emitting elements together; a plurality of light-transmitting members; The plurality of light-transmitting members are a plurality of first light-transmissive members respectively disposed on the plurality of light-emitting elements; and a second light-transmitting member disposed on the light-blocking member located on the outer periphery. The light emitting module of the present disclosure also includes: a substrate having a wiring layer on its surface; and the light source described above disposed on the substrate. [Effects of the Invention]

[0006] According to the embodiments of the present disclosure, a light source and a light emitting module having excellent light emission characteristics during partial illumination are provided. can be provided. [Brief explanation of the drawings]

[0007] [Figure 1A] FIG. 1 is a schematic top view illustrating a light source according to an embodiment of the present disclosure. [Figure 1B] FIG. 1B is a cross-sectional view taken along line IB-IB′ in FIG. 1A. [Figure 2] FIG. 2 is a schematic top view illustrating the positional relationship between a light emitting element and a light blocking member in a light source according to an embodiment. [Figure 3A] 10A and 10B are schematic top views illustrating modified examples of the light-transmitting member in the light source of the embodiment. [Figure 3B] FIG. 10 is a schematic top view illustrating another modified example of the light-transmitting member in the light source of the embodiment. [Figure 3C] FIG. 10 is a schematic top view illustrating yet another modified example of the light-transmitting member in the light source of the embodiment. [Figure 3D] FIG. 10 is a schematic top view illustrating yet another modified example of the light-transmitting member in the light source of the embodiment. [Figure 4A] 2 is a schematic top view for explaining the light emission form of the light source of the present embodiment. FIG. [Figure 4B] FIG. 4B is a cross-sectional view taken along line IVB-IVB′ in FIG. 4A. [Figure 4C] FIG. 4B is a cross-sectional view taken along line IVC-IVC′ in FIG. 4A. [Figure 4D] FIG. 10 is a schematic cross-sectional view illustrating the light emission mode of a light source of a comparative example of the embodiment. [Figure 5] FIG. 2 is a schematic cross-sectional view showing another example of a light source according to an embodiment. [Figure 6A] 5A to 5C are manufacturing process diagrams illustrating a method for manufacturing a light source according to an embodiment. [Figure 6B] 5A to 5C are manufacturing process diagrams illustrating a method for manufacturing a light source according to an embodiment. [Figure 6C] 5A to 5C are manufacturing process diagrams illustrating a method for manufacturing a light source according to an embodiment. [Figure 6D] 5A to 5C are manufacturing process diagrams illustrating a method for manufacturing a light source according to an embodiment. [Figure 6E] 5A to 5C are manufacturing process diagrams illustrating a method for manufacturing a light source according to an embodiment. [Figure 6F] 5A to 5C are manufacturing process diagrams illustrating a method for manufacturing a light source according to an embodiment. [Figure 6G] 5A to 5C are manufacturing process diagrams illustrating a method for manufacturing a light source according to an embodiment. [Figure 7] 1 is a schematic cross-sectional view showing a light-emitting module according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The embodiments shown are merely examples for embodying the technical idea of ​​the present invention, and are not intended to limit the present invention. In addition, the size and positional relationship of the components shown in each drawing are for the purpose of clarifying the explanation. For cross-sectional views, end views showing only the cut surface are often used. Furthermore, the same names and symbols generally indicate the same or similar components. In this specification, the terms "cover" and "cover" are used directly. Unless otherwise specified, this does not mean that the product is in indirect contact (for example, through other components). This also includes cases where the material is covered (by coating).

[0009] 〔light source〕 As shown in FIGS. 1A and 1B, the light source 10 of one embodiment includes a plurality of light-emitting elements 1 and a plurality of The light-emitting element 1 is provided with a light-shielding member 2 that holds the light-emitting elements 1 together, and a plurality of light-transmitting members 3. The light-shielding member 2 exposes the upper surfaces of the plurality of light-emitting elements 1, and The light-transmitting portions are arranged on the outer periphery of the entire light-emitting element and hold the plurality of light-emitting elements together. The member 3 includes a plurality of first light-transmitting members 31 respectively disposed on the plurality of light-emitting elements 1, and a plurality of and a second light-transmitting member 32 disposed on the light-shielding member 2 positioned on the entire outer periphery of the light-emitting element. nothing. By arranging each component in this way, it is possible to effectively suppress uneven light emission from the light source. In particular, when only a part of the plurality of light emitting elements, for example, only a few or one light emitting element, is turned on, Regardless of the position of the lit light-emitting element (for example, the center or edge of the entire plurality of light-emitting elements), The light emission state can be made uniform or approximately uniform, and uneven light emission can be reduced. The entire periphery of the plurality of light emitting elements is a matrix-like arrangement in plan view, as shown in FIG. Among the multiple light emitting elements arranged in the In other words, in plan view, it means the area surrounding the outline (dashed line Q) that connects the The light-emitting element 1 is surrounded by the outline (broken line Q) of the outside of the light-shielding portion described later. It means the area up to the end of material 2.

[0010] (Light-emitting element 1) The plurality of light emitting elements 1 are arranged two-dimensionally and may be randomly arranged. It is preferable that they are arranged regularly, and more preferably in a matrix form. For example, it is preferable that the particles are regularly arranged two-dimensionally along two directions. The row pitch may vary, for example, increasing from the center to the periphery. In particular, the plurality of light emitting elements 1 may be arranged in the same manner as in FIG. As shown in the figure, they are regularly and equally spaced along the x and y directions, which are perpendicular to each other. In FIG. 1A, the light-emitting elements 1 are arranged in a 5×6 array, for example. The arrangement pitch of the light emitting elements can be adjusted depending on the size of the light emitting elements. The size of the first light-transmitting member can be appropriately determined. If the length of one side or diameter of in the x direction is 100 μm or more and 1000 μm or less, x The pitch Px in the y direction is 110 μm or more and 2000 μm or less. The pitch Py in the direction is 110 μm or more and 2000 μm or less. It may be different from or the same as.

[0011] The light emitting element 1 is a semiconductor light emitting element, and is a known light emitting element such as a semiconductor laser or a light emitting diode. For example, the light-emitting element 1 is a light-emitting diode. The wavelength of the light emitted from the light source can be selected arbitrarily. For example, the wavelength of the light emitted from the light source can be selected from blue to green. As light-emitting elements that emit light of wavelengths, ZnSe, nitride semiconductors (In x Al y Ga 1-x- y N, 0≦x, 0≦y, x+y<1), and elements using GaP can be used. As a light emitting element that emits red wavelength light, semiconductors such as GaAlAs and AlInGaP are used. Furthermore, semiconductor light emitting devices made of materials other than these can also be used. A semiconductor light emitting element can also be used as the light emitting element 1. The composition of the semiconductor used and the light emitting properties of the light emitting element The color, size, number, etc. can be selected appropriately according to the purpose and design specifications. The optical elements may be light-emitting elements that all emit light of the same wavelength, or may be light-emitting elements that emit light of different wavelengths. The light emitting element may be a light emitting element that emits light of the type shown in FIG.

[0012] The light-emitting element 1 includes, for example, a light-transmitting support substrate and a semiconductor laminate on the support substrate. The semiconductor laminate includes an active layer and an n-type semiconductor layer and a p-type semiconductor layer sandwiching the active layer. The element 1 is made of a nitride semiconductor (In) capable of emitting light of a short wavelength. x Al y Ga 1-x- y N, 0≦x, 0≦y, x+y<1). The emission wavelength can be selected in various ways depending on the degree of mixed crystal. The light emitting element 1 has a negative electrode 1n and a positive electrode 1p on an n-type semiconductor layer and a p-type semiconductor layer, respectively. The light emitting element 1 has an upper surface 1a (hereinafter also referred to as a light emitting surface) which is a main light emitting surface. The light emitting element 1 has a bottom surface 1b located on the opposite side to the top surface 1a. The positive and negative electrodes may be provided, or the positive and negative electrodes may be provided on different surfaces. Preferably, the light-emitting element 1 has a positive electrode 1p and a negative electrode 1n on the lower surface 1b. Such an electrode arrangement allows the light emitting element to be flip-chip mounted on the mounting substrate. do. The light emitting element may have a polygonal planar shape such as a triangle, a square, or a hexagon, or may have a circular planar shape. The light emitting element may be shaped like an ellipse or the like, but preferably a rectangle. For example, the shape of the upper surface 1a may be set to a value between 100 μm and 1000 μm. 100 μm or less × 100 μm to 1000 μm rectangle, 150 μm to 500 μm It is preferable that the rectangular shape is 150 μm or less and 500 μm or less. The light source provided can be made smaller. For example, the plurality of light emitting elements 1 are each rectangular in plan view, and the entire structure is rectangular. It is preferable that the sensor is disposed in the position indicated by the arrows.

[0013] (Light-blocking member 2) The light-shielding member 2 has a function of protecting the plurality of light-emitting elements 1. In addition, the light-shielding member 2 has the following functions: It has the function of reflecting light emitted from the side of the light-emitting element 1 and guiding the light upward. This makes it possible to improve the efficiency of use of light emitted from the light emitting element 1. The light-blocking member 2 is disposed between the plurality of light-emitting elements 1 and around the entire periphery of the plurality of light-emitting elements 1. This allows the light blocking member 2 to hold a plurality of light emitting elements 1 together. The light-blocking member 2 exposes the upper surfaces of the plurality of light-emitting elements 1. The light-emitting surface of the optical element 1 is exposed. The light-shielding member 2 further includes a positive electrode and a negative electrode of the light-emitting element 1. It is preferable that the lower surface 1b exposed from the negative electrode is covered. However, the light emitted from the light-shielding member 2 can be efficiently extracted from the light-emitting surface. , exposing the underside of the electrode. When the light emitting element 1 is mounted on a mounting substrate, particularly when it is flip-chip mounted, In this case, the light emitting element 1 is located between the light emitting element 1 and the mounting substrate, that is, between the lower surface 1b of the light emitting element 1 and the upper surface 1b of the mounting substrate. The light-shielding member 2 may be disposed so as to fill the gap between the light-shielding member 2 and the light-shielding member 2 . As described above, the light-shielding member 2 is formed on the entire outer periphery of the plurality of light-emitting elements 1. 1 are arranged at a predetermined width (Wx, Wy in FIG. 2) in the x-direction or y-direction from the side surface 1s of The predetermined widths Wx and Wy here are preferably, for example, the distance D between the plurality of light emitting elements. It is preferable that x and Dy are set to be equal to or greater than x and Dy. The light emitted from the light emitting element located on the side can be distributed upward, and the light from the side of the light source can be The widths Wx and Wy are, for example, It can be set in the range of 5% to 200% of the width of the optical element.

[0014] The light-shielding member 2 is a member having light reflectivity and / or light absorption properties. It is preferable that the surface has reflectivity, so that the light emitted from the side surface of the light emitting element 1 is reflected. This allows light to be extracted from the top surface, resulting in a light source with superior light extraction efficiency. Specifically, the light-blocking member 2 has a reflectivity of 60% or more with respect to the light emitted from the light-emitting element. It is preferable that the reflectance is 80% or more. The light-blocking member 2 includes a resin base material and particles of a light-reflecting material contained in the resin. Examples include silicone resin, modified silicone resin, epoxy resin, modified epoxy resin, and Examples of the light-reflecting material include resins containing one or more of acrylic resins and fluororesins. Examples of light-reflecting materials include titanium oxide, aluminum oxide, silicon oxide, and zinc oxide. The average particle size is, for example, 0.05 μm or more and 30 μm or less. The light-shielding member 2 may further contain a light-absorbing material such as a dye, carbon black, a fluorescent material, etc. In the above, it is preferable that particles of a light-reflecting substance are dispersed in the resin.

[0015] (Translucent member 3) The light-transmitting member 3 is made up of a plurality of first light-transmitting members arranged on each of the plurality of light-emitting elements 1. 31, and a second transparent member disposed on the light-shielding member 2 located outside the entire outer periphery of the light-emitting element 1. and a light-transmitting member 32. The size of the first light-transmissive member 31 is smaller than the light-emitting surface of the light-emitting element 1 in a plan view. It may be the same as or larger than the light emitting surface of the light emitting element. 1A, the first light-transmitting member 31 is preferably a light-emitting surface of the light-emitting element. It is more preferable that the light emitting element is arranged so as to be larger and to enclose the light emitting element in plan view. The first light-transmissive member 31 preferably has the same shape as or a similar shape to the light-emitting surface of the light-emitting element. As shown in FIG. 1A, the plurality of first light-transmissive members 31 included in the light source 10 are each It is preferable that the planar shape and size of the first light-transmissive member 31 are the same. For example, the area is 100% or more and 150% or less of the planar area of ​​the light-emitting surface of the light-emitting element. The first light-transmissive member 31 is disposed on the plurality of light-emitting elements. For example, the first light-transmitting portions adjacent in the x direction are preferably arranged in the same manner as the first light-transmitting portions adjacent in the x direction. The distance dx between the adjacent first light-transmissive members 31 in the y direction and the distance dy between the adjacent first light-transmissive members 31 in the y direction are It is preferable that the distances Dx and Dy between the adjacent light emitting elements are smaller than these. It is possible to make the area with low brightness between adjacent light emitting elements smaller. The distance dx and the distance d are 5% to 50% of the length of one side of the element. The distance dx and the distance dy are equal to each other. may be the same or may be different. At least one of the plurality of first light-transmissive members included in the light source has a different planar shape and / or size. For example, as shown in FIG. 3B, the first light-transmissive member 31B may have one central The light emitting element in the center is placed on the light emitting element adjacent to it, i.e., the ... The light emitting element is integrally disposed on the light emitting element surrounding the light emitting element, and the light emitting element surrounding the light emitting element is also The first light-transmitting layer may be integrally disposed on the optical element. The members may vary in planar shape and / or size. The plurality of first light-transmissive members 31 are arranged as a whole in a plan view in the same manner as the arrangement of the light-emitting elements. It is preferable that the light-transmitting members are arranged in a rectangular shape. The light-transmitting member 3 is preferably arranged in a rectangular shape as a whole.

[0016] The second light-transmitting member 32 is formed at least on the light-shielding member 2 disposed on the entire outer periphery of the light-emitting element 1. It is sufficient that one second translucent film is disposed, but a plurality of second translucent films may be disposed. The member 32 is not disposed on the light-emitting element 1. For example, as shown in FIG. 1A, The light-transmitting member 32 is disposed on the light-shielding member 2 arranged on the entire outer periphery of the light-emitting element 1. 1, the first light-transmissive members 31 may be arranged in the x and y directions. In this case, the second light-transmitting member 32 may have the same shape and size as the first light-transmitting member 31. Alternatively, the shape and size may be such that only a part of the first light-transmissive member 31 is included. The second light-transmissive member has a width in the arrangement direction different from that of the first light-transmissive member disposed adjacent thereto. In this case, the first light-transmitting member 31 and the second light-transmitting member 32 may be arranged in a spiral shape in the X direction in a plan view. The length of one side in the X direction of the second light-transmissive members 32 adjacent to each other in the X direction is 1 It is preferable that the length is 5% or more and 100% or less of the length of one side of the light-transmitting member in the X direction, and 25% or less In this case, the uppermost 75% or less of the first light-transmissive member 31 is adjacent to the second light-transmissive member 32 in the X direction. The length of one side of the first light-transmitting member 32 in the Y direction is It is preferable that the length of the second light-transmitting member is 100% or more of the length of one side of the second light-transmitting member. The light spread in the X direction in the first light-transmissive member adjacent to the second light-transmissive member 32 is The first light-transmissive member can be approximated to a first light-transmissive member that is not adjacent to the first light-transmissive member. From the same viewpoint, the first transparent light source adjacent to the light emitting surface of the light source in the x direction and / or the y direction The distance between the light-transmitting member 31 and the second light-transmitting member 32 is set to be equal to the distance between the first light-transmitting member 31 and the second light-transmitting member 32 adjacent in the x direction and / or y direction. It is preferable that the distance is the same as the distance dx and / or dy between the optical members 31. It is preferable that the member 31 and the second light-transmissive member 32 have the same thickness. As shown in FIG. 3A, the second light-transmitting member 32A is a shielding member disposed on the entire outer periphery of the light-emitting element 1. Even if only one is arranged on the optical member 2 so as to surround the entire light emitting element 1, In this case, the second light-transmissive member 32A has a different shape and size from the first light-transmissive member 31. Furthermore, as shown in FIG. 3B, the second light-transmissive member 32B is On the light-shielding member 2 arranged on the periphery, only one light-shielding member is arranged so as to surround the entire light-emitting element 1. It may be arranged. The second light-transmissive member 32 is formed by a plurality of first light-transmissive members 31 that are rectangular in shape as a whole in a plan view. When they are arranged in a rectangular shape, it is preferable that one or more of them are arranged along the periphery of the rectangle. It's nice.

[0017] The upper surfaces of the plurality of first light-transmitting members 31 and second light-transmitting members 32 are light-shielding portions. The first light-transmitting member 31 and the second light-transmitting member 32 are exposed from the substrate 2. It is preferable that the light-shielding member 2 is disposed. In this case, the adjacent first light-transmitting member 31 The opposing side surfaces of the second light-transmitting member 32 are covered with the light-shielding member 2 only partially in the thickness direction. However, it is preferable that the entire thickness of the light-shielding member 2 is covered with the light-shielding member 2. In other words, the upper surface of the light-shielding member 2 and the plurality of first light-transmitting members 31 and second light-transmitting members 32 The upper surfaces of the second light-transmissive member 32 and the first light-transmissive member 31 are preferably flush with each other. The side surface that does not face the light-transmitting member 32, i.e., the side surface facing the outside of the light source, is made of a light-shielding member. In other words, the second light-transmitting member 32 does not have to be covered by the outer surface of the light source. It is preferable that the light-shielding member 2 has a side surface exposed from the light-shielding member 2.

[0018] The light-transmitting member 3 is a member that transmits at least a part of the light emitted from the light-emitting element 1, Examples include those that transmit 60% or more of the light emitted from the light-emitting element, and those that transmit 70% or more, 75% or more. % or more or 80% or more of light is preferably transmitted through the film. Specifically, the light-transmitting member 3 has an upper surface which is a light-emitting surface of the light source, a lower surface opposite to the upper surface, and The first light-transmissive member 31 has a side surface between the upper surface and the lower surface. The lower surface of the first light-transmissive member 31 faces the upper surface of the light-emitting element 1. The lower surface of the second light-transmitting member 32 is a light-shielding portion located on the outer periphery of the entire light-emitting element 1. The upper and lower surfaces of the light-transmitting member 3 are flat surfaces parallel to each other. Preferably, the side surface may be a surface perpendicular to the upper surface and / or the lower surface. Alternatively, it may have an inclined surface that is inclined relative to the lower surface. The light-transmitting member 3 can be made of light-transmitting resin, glass, ceramics, etc. Examples of the light-transmitting resin include silicone resin, modified silicone resin, epoxy resin, and modified epoxy resin. Resins containing one or more of vinyl resin, acrylic resin, and fluororesin can be used. The light-transmitting member 3 also contains a phosphor capable of converting the wavelength of at least a part of the incident light. The light-transmitting member 3 containing a phosphor can be, for example, a sintered body of a phosphor or a transparent Examples include fluorescent resins, glass, ceramics, etc. containing phosphor powder. A resin containing a fluorescent material is applied to the surface of a transparent plate, which is a molded body of transparent resin, glass, ceramics, etc. It may also be one having a light-transmitting layer such as a fat layer formed thereon. The phosphor is an yttrium aluminum garnet phosphor (e.g., Y3( Al,Ga)O 12 :Ce), lutetium aluminum garnet phosphors (e.g. For example, Lu3(Al,Ga)5O 12 :Ce), terbium aluminum garnet system Phosphors (e.g., Tb3(Al,Ga)5O 12 :Ce), CCA-based phosphors (e.g., C a 10 (PO4)6Cl2:Eu), SAE-based phosphors (e.g., Sr4Al 14 O 25 : Eu), chlorosilicate phosphors (e.g., Ca8MgSiO 16 Cl2:Eu), β-sialon phosphors (e.g., (Si,Al)3(O,N)4:Eu), α-sialon Ca(Si,Al) based phosphors (e.g., Ca(Si,Al) 12 (O,N) 16 :Eu), SLA-based phosphor ( For example, SrLiAl3N4:Eu), CASN-based phosphors (for example, CaAlSiN3: Eu) or SCASN-based phosphors (e.g., (Sr,Ca)AlSiN3:Eu) Nitride-based phosphors, KSF-based phosphors (e.g., K2SiF6:Mn), KSAF-based phosphors ( For example, K2Si0.99 Al 0.01 F 5.99 :Mn) or an MGF-based phosphor (e.g., a fluoride-based phosphor such as 3.5MgO·0.5MgF2·GeO2:Mn), a perovskite phosphor having a structure (e.g., CsPb(F,Cl,Br,I)3), or a quantum dot phosphor (e.g., CdSe, InP, AgInS2 or AgInSe2) can be used. The KSAF-based phosphor may have a composition represented by the following formula (I). M2[Si p Al q Mn r F s (I) In formula (I), M represents an alkali metal and may contain at least K. Mn may be tetravalent Mn ions. p, q, r, and s may satisfy 0.9 ≦ p + q + r ≦ 1.1, 0 < q ≦ 0. 1, 0 < r ≦ 0.2, 5.9 ≦ s ≦ 6.1. Preferably, 0.95 ≦ p + q + r ≦ 1.05 or 0.97 ≦ p + q + r ≦ 1.03, 0 < q ≦ 0.03, 0.0 02 ≦ q ≦ 0.02 or 0.003 ≦ q ≦ 0.015, 0.005 ≦ r ≦ 0.15, 0. 01 ≦ r ≦ 0.12 or 0.015 ≦ r ≦ 0.1, 5.92 ≦ s ≦ 6.05 or 5.95 ≦ s ≦ 6.025. For example, K2[Si 0.946 Al 0.005 Mn 0. 049 F 5.995 , K2[Si 0.942 Al 0.008 Mn 0.050 F 5.99 2], K2[Si[[ID=D59]] 0.939 Al 0.014 Mn 0.047 F 5.986 , and the composition represented by ​Such KSAF phosphors have high brightness and a peak emission wavelength. Red light emission with a narrow half-width can be obtained.

[0019] The plurality of first light-transmissive members 31 may be partially or entirely made of a light-transmissive material. In this case, the first light-transmitting portions may contain a fluorescent material, or a part or all of the first light-transmitting portions may contain a fluorescent material. Some or all of the materials 31 may contain the same phosphor, or some or all of the materials 31 may contain different phosphors. All of the first light-transmissive members 31 may be excited by blue light and emit yellow light. The first light-transmitting members 31 may contain a phosphor that emits light. It contains a phosphor that is excited by blue light and emits yellow light, and another part of it is excited by blue light. The first light-transmissive member 31 may contain a phosphor that emits orange light. By adjusting the type or content of the substance, light of a desired color can be emitted from the upper surface of the first light-transmitting member 31. can be emitted. In a light source including a plurality of light-emitting elements 1 that emit blue light, as shown in FIG. 3C, The first light-transmissive member 31C and the first light-transmissive member 31D emit light of different colors from the upper surface in the Y and Y directions. The first light-transmitting members 31C and 31D can be arranged alternately. The first light-transmissive member 31C contains a fluorescent material that emits yellow light when excited by the fluorescent material. White light is emitted from the upper surface of the first light-transmissive member 31C. The first light-transmissive member 31D is made of a phosphor that is excited by blue light and emits red light and a phosphor that is excited by blue light and emits yellow light. The fluorescent material contains a phosphor, and orange light is emitted from the top surface. This allows the emitted light color to vary from white light to orange. In this case, a light source capable of adjusting the brightness within a range of color light can be obtained. Similarly, second light-transmissive members 32C and 32D are arranged in the x and y directions in correspondence with 31C and 31D. In this case, the second light-transmitting member 32C is preferably arranged alternately in the first light-transmitting member 32B. The second light-transmitting member 32D contains a fluorescent material that emits yellow light, similar to the first light-transmitting member 31C. Like 31D, it contains a red-emitting phosphor and a yellow-emitting phosphor.

[0020] In addition, in a light source including a plurality of light-emitting elements 1 that emit blue light, as shown in FIG. a first light-transmitting portion having different luminescent colors emitted from its upper surface in the x direction and the y direction; The first light-transmitting member 31E, the first light-transmitting member 31F, and the first light-transmitting member 31G can be arranged alternately. The first light-transmissive member 31E does not contain a fluorescent material, and the first light-transmissive member 31E is The first light-transmissive member 31F emits blue light. The first light-transmissive member 31F contains a phosphor that is excited by blue light and emits red light. The first light-transmissive member 31G is excited by blue light and emits green light. It contains a fluorescent material that emits light, and green light is emitted from the top surface. This allows blue, green, and red light to be emitted. In this case, a light source capable of multicolor display can be obtained. Second light-transmitting members 32E, 32F, and 32G correspond to the light-transmitting members 31C, 31E, and 31F. Similarly, it is preferable that the second translucent The member 32E does not contain a phosphor, similar to the first light-transmissive member 31E, and the second light-transmissive member 32F The second light-transmitting member 32G contains a phosphor that emits red light, similar to the first light-transmitting member 31F. Like the light-transmitting member 31G, it contains a phosphor that emits green light.

[0021] The light-transmitting member 3 may contain a light-diffusing material. Examples of the light-diffusing material include an acid. Examples of such particles include titanium oxide, aluminum oxide, silicon oxide, and zinc oxide. The light-diffusing material is dispersed in the light-transmitting member, or the light-transmitting member is provided with a layer containing such particles. By doing so, the light emitted from the light emitting element 1 can be diffused and emitted to the outside. This makes it possible to suppress uneven light emission on the upper surface of the light-transmitting member 3. The distance between adjacent light-transmitting members 3 is The thickness may be different between the first and second light-transmitting members, and between adjacent second light-transmitting members. For example, the range is 10 μm or more and 200 μm or less, and 30 μm or less The range of 40 μm to 80 μm is preferable. .

[0022] Such a plurality of light-transmitting members 3 are disposed on the plurality of light-emitting elements 1 as first light-transmitting members 31. The second light-transmitting member 32 is formed on the light-shielding member positioned on the outer periphery of the plurality of light-emitting elements 1. As a result, from the light emitting surface side of the light source (i.e., the light emitting surface side of the light emitting element), When the light source is visually recognized, the area of ​​the light-blocking member 2 located on the periphery of the light source can be reduced. This makes it possible to make the outer peripheral light-blocking member 2 less noticeable when the light source is viewed from the outside, for example. This makes it possible to improve the design of the light source. The difference in color between the light-transmitting member 3 and the light-blocking member 2 is reduced from being visible from the outside. It can be done. Furthermore, by providing the light source 1 with the second light-transmitting member 32, as shown in FIGS. 4B and 4C, light m passing through the light-transmitting member 31X when the light-emitting element 1 located inside is turned on, and The light n passing through the light-transmitting member 31Y when the light-emitting element 1 located on the outside is turned on and the light The spread of light on the first side can be approximated. When the second light-transmitting member is not disposed, as shown in FIG. 4D, the light-emitting element is positioned around the entire periphery of the light-emitting element. The light blocking member 22 prevents the light t emitted from the light emitting element 1 located outside from traveling. As a result, there is a risk that the light will be unevenly spread on the light-emitting surface side. In this case, when a specific light emitting element among a plurality of light emitting elements is turned on, the light emitting elements positioned on the outside are turned on. This allows us to obtain a light source with the same light spread from both the inner and outer light emitting elements. Cut. 4B to 4D, for ease of explanation, the distance between each member inside the light source is The illustration does not take into account the refraction of light.

[0023] (Light Diffusing Layer 4) As shown in FIG. 5, the light source 10A of the embodiment has a light diffusing layer covering the upper surface of the light-transmitting member 3. The light-diffusing layer 4 may further cover only a part of the light-transmitting member 3. However, it is also possible to integrally cover the first light-transmitting member 31 and the second light-transmitting member 32. In this case, the light diffusion layer 4 is preferably formed on the light shielding member 2 between the light transmitting members 3. It is preferable to cover the upper surface of the light emitting element 1 at once. In this case, the non-luminous area between adjacent luminous areas may be visually recognized from the outside as an area with low brightness. This can suppress the above. The light diffusion layer 4 has the function of diffusing and guiding the light emitted from the light emitting element 1. The layer 4 may be a single layer or may have a laminated structure including multiple layers. 4, for example, has a total light transmittance (Tr) of 30% to 99% and a diffusion coefficient (D The thickness of the light diffusion layer 4 is, for example, 10 μm or more and 200 μm or less. The light diffusion layer 4 may be in contact with the upper surfaces of the light-shielding member 2 and the light-transmitting member 3, or may be in contact with the upper surfaces of the light-shielding member 2 and the light-transmitting member 3. The light diffusing member 2 and the light-transmitting member 3 may be disposed at a distance from each other. The lower surface of the layer 4 is preferably in direct contact with the upper surfaces of the light-shielding member 2 and the light-transmitting member 3 . This allows the light from the light emitting element 1 to be efficiently introduced into the light diffusing layer 4, The light diffusion layer 4 can improve the extraction efficiency. The light-transmitting layer 5 is in contact with the upper surface of the member 3 via a light-transmitting layer, an adhesive layer, or the like. Good too.

[0024] The light diffusion layer 4 contains a light-transmitting resin and a light-diffusing substance contained in the light-transmitting resin. The light-diffusing material may be the same as the light-transmitting resin and light-diffusing material used in the light-transmitting member 3. In addition, polycarbonate resin, polystyrene resin, The light diffusing layer may be made of a resin that has low absorption of visible light, such as polyethylene resin. The surface of 4 may be flat or may have minute irregularities.

[0025] (Mounting board 50) As shown in FIG. 5, a light source 10A according to one embodiment has a plurality of light emitting elements 1 mounted on a mounting substrate 50. It may be placed on top. The mounting substrate 50 has, at least on its upper surface, wiring 51 connected to the light emitting element 1; The mounting substrate 50 may be a roll-to-roll type. It may be a flexible printed circuit board (FPC) that can be manufactured by the method, or it may be a flexible board that can be manufactured by the method. The substrate may be a thin substrate or a rigid substrate. The substrate 52 may be made of, for example, aluminum oxide, aluminum nitride, silicon nitride, or mura. Ceramics such as SiO2; PA (polyamide), PPA (polyphthalamide), PPS (poly Thermoplastic resins such as polyphenylene sulfide and liquid crystal polymers; epoxy resins, silicones Resins such as styrene resin, modified epoxy resin, urethane resin and phenol resin can be used. Among these, it is preferable to use ceramics, which has excellent heat dissipation properties. The wiring 51 may be disposed not only on the upper surface of the base 52 but also on the lower surface. The wiring 51 may be connected via wiring arranged on the side surface, or may be connected via an inner layer wiring such as a via. The wiring 51 may be connected via a wire. The wiring 51 may have a thickness that varies in parts. The wiring can be formed by electrolytic plating, electroless plating, sputtering, vapor deposition, etc. The wiring 51 can be made of iron, copper, nickel, aluminum, gold, platinum, titanium, Examples of the metal include tungsten, palladium, and the like, and alloys containing these.

[0026] [Method for manufacturing the light source 10] The light source 10 described above includes a light-transmitting sheet 3a, a plurality of light-emitting elements disposed on the light-transmitting sheet 3a, and a plurality of light-emitting elements disposed on the light-transmitting sheet 3a. 1 is placed, dicing is performed, and a light-shielding member 2 is placed between the dicing area and the light-emitting element 1. It can be produced by The light-shielding member 2 is also connected to the positive electrode 1p and the negative electrode 1n of the light-emitting element 1 exposed from the light-shielding member 2. By forming such a conductive film 8, the light-shielding property can be improved. The surface area of ​​the positive electrode 1p and the negative electrode 1n of the light emitting element 1 exposed from the member 2 is substantially increased. This makes it possible to ensure connectivity to a substrate, etc.

[0027] (Preparation of light-transmitting sheet 3a) First, a light-transmitting sheet that can be divided into a plurality of light-transmitting members 3 by dicing is The light-transmitting sheet 3a is a laminated sheet in which a light-diffusing layer 4 is laminated on the light-transmitting sheet 3a. As shown in FIG. 6A, the light-transmitting sheet 3a may be a light-transmitting sheet 6. The laminated sheet 6 is prepared by laminating the light-transmitting layer 5 and the light-diffusing layer 4 in this order on the sheet 3a. The light-transmitting sheet 3a, the light-transmitting layer 5, and the light-diffusing layer 4 are preferably sheet-shaped members. In this case, the layers are laminated together directly or via an adhesive layer or the like. In addition, the material of the light-transmitting sheet 3a, the material of the light-transmitting layer 5, and the material of the light-diffusing layer 4 are applied in this order onto the support. Alternatively, the laminated sheet 6 may be formed by laminating the layers by coating or the like in the reverse order. Each of them can be appropriately set so as to exhibit the above-mentioned characteristics. It is sufficient that the layer can transmit at least a part of the light emitted from the light emitting element 1. For example, those that transmit 60% or more of the light emitted from the light-emitting element can be mentioned, and those that transmit 70% or more, The light-transmitting layer 5 preferably transmits 75% or more, or 80% or more of light. The thickness of the light-transmitting layer is 20 μm or more and 400 μm or less. Such a light-transmitting layer 5 can transmit light emitted from the light-emitting element in the lateral direction. This can contribute to reducing uneven brightness between light-emitting sections.

[0028] (Arrangement of light-emitting element 1) Next, as shown in FIG. 6B, a plurality of light-emitting The elements 1 are arranged. In this case, the light emitting surface side of the light emitting element 1 is placed on the light-transmitting sheet 3a. The light emitting surface of the light emitting element 1 and the light-transmitting sheet 3a may be fixed so as to be in direct contact with each other, or The fixing may be performed using a light-transmitting adhesive or the like.

[0029] (dicing) Next, as shown in FIG. 6C, a small amount of light is applied between the plurality of light-emitting elements 1 arranged on the laminated sheet 6. The blade 7 is used to cut the light-transmitting sheet 3a at least entirely in the thickness direction. At this time, the laminated sheet 6 is made of the light-transmitting sheet 3a, the light-transmitting layer 5, and the light-diffusing layer 6. When a laminated sheet is prepared by laminating the light-transmitting sheet 3a and the light-transmitting sheet 4, the entire thickness of the light-transmitting sheet 3a, The optical layer 5 is entirely or partially diced in the thickness direction, and the light diffusion layer 4 is not diced. That is, in the laminated sheet 6, it is preferable to cut the entire translucent sheet 3a in the thickness direction. However, in order to avoid dicing of the light diffusion layer 4, the light-transmitting sheet 3a and the light diffusion layer 4 are In this case, it is preferable to dispose a light-transmitting layer 5 as a buffer layer between the light-transmitting layer 5 and the light-transmitting layer 5. A portion of the wafer is cut off by dicing. The light-transmitting sheet 3a is diced between all the light-emitting elements. In this case, dicing is also performed on the outer side surface 1s of the light emitting element 1g. It is preferable to perform dicing at the same pitch in the x and y directions as that performed between optical elements. In plan view, the laminated sheet 6 on the outer side of the light emitting element 1g is The dicing position for dividing the wafer into individual pieces can be set arbitrarily.

[0030] (Formation of light-shielding member 2) As shown in FIG. 6D, the material constituting the light-shielding member 2 is applied to a laminated sheet 6 in a plurality of layers. The light-shielding member 2 is arranged to integrally cover the light-emitting element 1. The light emitting element 1 may be entirely covered so as to be embedded therein, or as shown in FIG. 6E, the light emitting element Alternatively, all of the light-emitting elements 1, i.e., the electrodes of the light-emitting elements 1 may be covered so as to be exposed. After covering everything including the electrodes so as to bury them, a light-shielding Part of the material that makes up the member 2 may be removed. Such removal may be achieved by etching or grinding. This can be done by a method known in the art, such as the above. This can be done.

[0031] (Formation of conductive film 8) As shown in FIG. 6F, a conductive film 8a is formed on the light-shielding member 2 and the electrodes exposed from the light-shielding member 2. The conductive film 8a may be made of any conductive material, such as copper, aluminum, gold, Metals such as silver, platinum, titanium, tungsten, palladium, iron, nickel, etc. It can be formed from an alloy containing a metal. By removing a part of the conductive film 8a covering the light-shielding member 2 by abrasion or the like, A conductive film 8 can be formed so that a part of the conductive film 8 covers the electrode and another part of the conductive film 8 covers the light-shielding member 2. The thickness of the conductive film can be appropriately set depending on the performance to be obtained, the material to be used, and the like. For example, when removing a conductive film by laser ablation, the thickness of the conductive film must be 1 μm or less. Preferably, the thickness is 125 angstroms or less and 1000 angstroms or less. More preferable.

[0032] [Light-emitting module] As shown in FIG. 7, the light emitting module 20 of the embodiment includes a substrate 21 and a light emitting element disposed on the substrate 21. The substrate 21 has a wiring layer on its surface, and the wiring layer is, for example, a light source 10. The elements may be formed so as to be capable of being matrix-driven in segment units. , and may be configured to be capable of performing local dimming operations. The light emitting module 20 may include a lens 11 disposed on the light source 10. The lens 11 in the optical system is a lens that exhibits various functions, such as a convex lens, a concave lens, a Fresnel lens, etc. In addition, a housing 12 may be provided to support the lens 11. stomach. [Industrial Applicability]

[0033] The light source and light emitting module of the present disclosure can be used as a flash light source for a camera, a headlight for a vehicle, It can be used for backlighting of LCD displays, various lighting fixtures, etc. [Explanation of symbols]

[0034] 1 Light-emitting element 1a Top surface 1b Bottom side 1g Light emitting element placed on the outside 1n negative electrode 1p positive electrode 1s side 2, 22 Light-shielding member 3, 31X, 31Y Translucent material 31, 31B, 31C, 31D, 31E, 31F, 31G 1st translucent member 32, 32A, 32B, 32C, 32D, 32E, 32F, 32G 2nd transparent part Material 3a Translucent sheet 4. Light diffusion layer 5 Translucent layer 6 Laminated Sheet 7 Blades 8 Conductive Film 10, 10A light source 11 Lens 12. Case 20 Light-emitting module 21 PCB 50 Mounting board 51 Wiring 52 Base

Claims

1. A plurality of light-emitting elements; a light-blocking member; a plurality of light-transmitting members; the plurality of light-transmitting members are arranged such that their upper surfaces are positioned on the same plane, and include a plurality of first light-transmitting members and a plurality of second light-transmitting members; the plurality of first light-transmitting members are arranged in a rectangular shape as a whole, and the light-emitting element is arranged under each of the first light-transmitting members; The plurality of second light-transmitting members are arranged so as to surround the first light-transmitting member and so as to form a rectangle as a whole, no light-emitting element is arranged below each of the second light-transmitting members, and the width of each of the second light-transmitting members in the arrangement direction relative to the adjacent first light-transmitting members is different from the width of each of the adjacent first light-transmitting members in the arrangement direction.

2. The light source according to claim 1 , wherein the width of the second light-transmissive member in the arrangement direction with respect to the adjacent first light-transmissive member is smaller than the width of the adjacent first light-transmissive member in the arrangement direction.

3. 3. The light source according to claim 1, wherein a width of the second light-transmitting member in an arrangement direction with respect to the adjacent first light-transmitting member is 25% to 75% of a width of the adjacent first light-transmitting member in the arrangement direction.

4. 4. The light source according to claim 1, wherein the light blocking member is disposed between the plurality of light-transmitting members.

5. 5. The light source according to claim 1, wherein the light blocking member supports the plurality of light emitting elements.

6. 6. The light source according to claim 1, wherein the plurality of second light-transmitting members include second light-transmitting members having different areas.

7. 7. The light source according to claim 1, wherein the light emitting element emits blue light.

8. 8. The light source according to claim 1, wherein the light-transmitting member contains a phosphor.

9. 9. The light source according to claim 1, wherein the first light-transmissive member contains a phosphor that is excited by blue light and emits yellow light.

10. The light source according to any one of claims 1 to 9, wherein some of the first translucent members include phosphors that are excited by blue light to emit yellow light, and other of the first translucent members include phosphors that are excited by blue light to emit orange light.

11. 11. The light source according to claim 1, wherein the light-transmitting member contains a light-diffusing substance.

12. 12. The light source according to claim 1, wherein an upper surface of the light emitting element is enclosed within the first light-transmissive member.

13. The light source according to any one of claims 1 to 12, wherein the plurality of light-emitting elements are mounted on a mounting substrate, and the light-blocking member is arranged between the plurality of light-emitting elements, around the entire periphery of the plurality of light-emitting elements, and between the light-emitting elements and the mounting substrate.

14. a substrate having a wiring layer on its surface; A light emitting module comprising: a light source according to any one of claims 1 to 13, disposed on the substrate.

15. The light emitting module of claim 14 , further comprising a lens disposed over the light source.

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