Light emission device

Abstract

To provide a light emission device which can be compact in size and inexpensive.SOLUTION: A light emission device 1D includes: a first light source 2A having a plurality of first light emission elements 23A which can be driven individually or per group; a second light source 2B having a plurality of second light emission elements 23B which can be driven individually or per group; and an optical member 3D. The optical member 3D includes: a first incident surface 30A having a reflection transmissive film 31 therein and positioned opposite the first light source 2A; a second incident surface 30B positioned opposite the second light source 2B; and a light emission surface 32 from which the light that has been incident on the first incident face 30A and the second incident surface 30B from the first light source 2A and the second light source 2B and reflected on or passed through the reflection transmission film 31 emits as emission light LO. The first incident surface 30A includes a plurality of first recesses 300A at positions corresponding to the first light emission elements 23A, respectively. The second incident surface 30B includes a plurality of second recesses 300B at positions corresponding to the second light emission elements 23B, respectively.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present invention relates to a light emitting device. [Background technology]

[0002] Conventionally, light emitting devices configured by combining multiple light sources have been known. For example, Patent Document 1 discloses a light emitting device that combines illumination light from multiple LED arrays via a lens group and a dichroic mirror into illumination light on a single optical path and emits the combined light. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-071246 Summary of the Invention [Problem to be solved by the invention]

[0004] In the light emitting device disclosed in Patent Document 1, a lens group and a dichroic mirror are provided for each of a plurality of LED arrays. Therefore, optical components such as a lens group are disposed between the LED array and the dichroic mirror, which increases the overall size of the light emitting device and the number of components, resulting in increased costs.

[0005] The present invention has been made in view of the above circumstances, and has an object to provide a light emitting device that allows the device to be made smaller and less expensive. [Means for solving the problem]

[0006] A light-emitting device according to one aspect of the present invention includes: a first light source having a plurality of first light emitting elements that can be driven individually or in groups; a second light source having a plurality of second light emitting elements that can be driven individually or in groups; an optical member having a reflective / transmissive film therein, and including a first incident surface disposed opposite the first light source, a second incident surface disposed opposite the second light source, and an exit surface from which light from the first light source and the second light source is incident on the first incident surface and the second incident surface and is reflected by or transmitted through the reflective / transmissive film and exits as exit light, the first incident surface has a plurality of first recesses at positions corresponding to the plurality of first light-emitting elements, respectively, and light that is incident on the first incident surface and passes through the first recesses has a first color; The second incident surface has a plurality of second recesses at positions corresponding to the plurality of second light-emitting elements, and light that is incident on the second incident surface and passes through the second recesses is of a second color. [Effects of the Invention]

[0007] According to the light-emitting device of the above aspect of the present invention, when light from a plurality of first light-emitting elements is incident on a plurality of first recesses of a first incident surface of an optical member, and light from a plurality of second light-emitting elements is incident on a plurality of second recesses of a second incident surface of the optical member, each light is reflected or transmitted through the reflective / transmissive film of the optical member and is emitted as output light from the output surface of the optical member. Therefore, even without disposing optical components other than the optical member between the first light source and the second light source and the optical member, the light from the first light source and the second light source can be emitted as output light from the output surface of the optical member. This allows for a light-emitting device to be made smaller and less expensive. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing an overall configuration of an example of a light emitting device 1A according to a first embodiment. [Figure 2] 1A and 1B are a schematic front view (center), a schematic left side view (left side), and a schematic plan view (upper side) showing an example of an optical member 3A. [Figure 3A] 1 is a partial configuration diagram showing a first light source 2A and an optical member 3A before positioning in a light emitting device 1A according to a first embodiment. [Figure 3B]1 is a partial configuration diagram showing a first light source 2A and an optical member 3A after positioning in a light emitting device 1A according to a first embodiment. FIG. [Figure 4] FIG. 2 is a perspective view showing an example of a light source 2. [Figure 5] FIG. 2 is a plan view showing an example of a light source 2. [Figure 6] FIG. 6 is an enlarged plan view of a portion VI shown in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along the line VII-VII shown in FIG. 5. [Figure 8] FIG. 8 is an enlarged cross-sectional view of a portion VIII shown in FIG. 7. [Figure 9] FIG. 10 is an overall configuration diagram showing a light emitting device 1B according to a second embodiment. [Figure 10] FIG. 10 is a partial configuration diagram showing a light emitting device 1B according to a second embodiment. [Figure 11] FIG. 10 is an overall configuration diagram showing a light emitting device 1C according to a third embodiment. [Figure 12A] FIG. 10 is a partial configuration diagram showing a first light source 2A and an optical member 3A before positioning in a light emitting device 1C according to a third embodiment. [Figure 12B] FIG. 10 is a partial configuration diagram showing a first light source 2A and an optical member 3A after positioning in a light emitting device 1C according to a third embodiment. [Figure 13] FIG. 10 is an overall configuration diagram showing a light emitting device 1D according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that light emitting devices 1A to 1D according to the present embodiments are intended to embody the technical concept of the present invention, and unless otherwise specified, the present invention is not limited to the following. The size and positional relationship of components shown in each drawing may be exaggerated as appropriate, and some components may be simplified or omitted.

[0010] In this embodiment, for convenience of explanation, an XYZ Cartesian coordinate system is used for explanation. The thickness direction of the light emitting element 23 (details will be described later) of the light source 2 provided in the light emitting devices 1A to 1D is defined as the "Z axis," and the two directions perpendicular to the thickness direction are defined as the "X axis" and the "Y axis." On the Z axis, the direction along which the light from the light source 2 mainly travels is defined as "up," and the opposite direction is defined as "down." However, the expressions "up" and "down" are also for convenience and are unrelated to the direction of gravity. Furthermore, the expression "planar view" in this specification refers to a view from above the Z axis to below.

[0011] (First embodiment) FIG. 1 is an overall configuration diagram showing an example of a light-emitting device 1A according to the first embodiment. In FIG. 1, a schematic plan view of a first light source 2A is shown on the left side of the light-emitting device 1A shown in the center, a schematic plan view of a second light source 2B is shown on the right side of the light-emitting device 1A, and a schematic plan view of a third light source 2C is shown below the light-emitting device 1A. FIG. 2 is a schematic front view (center), a schematic left side view (left side), and a schematic plan view (top side) showing an example of an optical member 3A according to the first embodiment. FIG. 3A is a partial configuration diagram showing the first light source 2A and the optical member 3A in the light-emitting device 1A according to the first embodiment before positioning. FIG. 3B is a partial configuration diagram showing the first light source 2A and the optical member 3A in the light-emitting device 1A according to the first embodiment after positioning.

[0012] The light emitting device 1A is a device that outputs emitted light LO that is a mixture of light of a first color, light of a second color, and light of a third color. The light emitting device 1A is used for any purpose. Examples of uses of the light emitting device 1A include, but are not limited to, vehicle headlights, projectors, displays, etc. In this embodiment, a case will be described in which red, green, and blue are specific examples of the first color, second color, and third color. In this case, the light emitting device 1A can output full-color emitted light LO by changing the color mixing ratio of each color.

[0013] The light emitting device 1A is configured to include at least a first light source 2A, a second light source 2B, a third light source 2C, and an optical member 3A. The first light source 2A, the second light source 2B, and the third light source 2C are basically configured to include common components.

[0014] The first light source 2A includes a plurality of first light-emitting elements 23A that can be driven individually or in groups, a first substrate 20A on which the plurality of first light-emitting elements 23A are arranged at a predetermined element spacing L, and a first drive circuit 24A that drives the plurality of first light-emitting elements 23A to light up individually or in groups.

[0015] The second light source 2B includes a plurality of second light-emitting elements 23B that can be driven individually or in groups, a second substrate 20B on which the plurality of second light-emitting elements 23B are arranged at a predetermined element spacing L, and a second drive circuit 24B that drives the plurality of second light-emitting elements 23B to light up individually or in groups.

[0016] The third light source 2C includes a plurality of third light-emitting elements 23C that can be driven individually or in groups, a third substrate 20C on which the plurality of third light-emitting elements 23C are arranged at a predetermined element spacing L, and a third drive circuit 24C that drives the plurality of third light-emitting elements 23C to light up individually or in groups.

[0017] The element spacing L of the first light-emitting elements 23A, the second light-emitting elements 23B, and the third light-emitting elements 23C indicates the pitch between adjacent light-emitting elements. The element spacing L is determined according to the arrangement of the first light-emitting elements 23A, the second light-emitting elements 23B, and the third light-emitting elements 23C. For example, when the arrangement is a matrix or a staggered pattern, the element spacing L is determined by the distance between the centers of adjacent light-emitting elements in the X and Y directions, respectively. The element spacing L may be the same or different in the X and Y directions. When the arrangement is annular, the element spacing L is determined by the distance between the centers of adjacent light-emitting elements 23 in the circumferential and radial directions, respectively. The element spacing L may be the same or different in the circumferential and radial directions. The total number of the first light-emitting elements 23A, the second light-emitting elements 23B, and the third light-emitting elements 23C is also determined according to the arrangement of the first light-emitting elements 23A, the second light-emitting elements 23B, and the third light-emitting elements 23C. When the arrangement is a matrix or a staggered pattern, the total number of elements is determined by the number of elements in the X and Y directions. When the arrangement is a ring, the total number of elements is determined by the number of elements in the circumferential and radial directions.

[0018] The element size S of the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C indicates the dimension in a planar view. When the outer shapes of the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C are rectangular in a planar view, the element size S is determined by the dimensions in the X direction and the Y direction, respectively. The element size S may be the same or different in the X direction and the Y direction.

[0019] 1, the first light-emitting elements 23A, the second light-emitting elements 23B, and the third light-emitting elements 23C are provided in equal numbers and have a common arrangement. Specifically, the arrangement of the first element positions, the second element positions, and the third element positions is a matrix arrangement (total number of elements: 18) consisting of six elements arranged in the X direction and three elements arranged in the Y direction, as shown in FIG. 1. The common arrangement means that when comparing each first element position where the first light-emitting element 23A is arranged, each second element position where the second light-emitting element 23B is arranged, and each third element position where the third light-emitting element 23C is arranged, the element spacing L is the same and the arrangement form is the same.

[0020] In this embodiment, the first light emitting element 23A, the second light emitting element 23B, and the third light emitting element 23C each emit light of a third color (blue). Other detailed configurations of the first light source 2A, the second light source 2B, and the third light source 2C will be described later.

[0021] The optical member 3A is composed of a prism made of glass, a light-transmitting resin, or the like. The optical member 3A may have any shape. In this embodiment, the optical member 3A is composed of a dichroic prism having a substantially rectangular parallelepiped shape.

[0022] The optical member 3A has one or more reflection / transmission films 31 therein, and also has a first incident surface 30A, a second incident surface 30B, a third incident surface 30C, and an exit surface 32. The first incident surface 30A and the second incident surface 30B are located on opposite sides of the outer surface of the optical member 3A. The third incident surface 30C and the exit surface 32 are located on opposite sides of the outer surface of the optical member 3A. Note that while the left side view of FIG. 2, FIGS. 3A, and 3B illustrate the configuration of the first incident surface 30A, the second incident surface 30B and the third incident surface 30C are configured similarly.

[0023] The first incident surface 30A is an incident surface that is disposed opposite the first light source 2 A. The first incident surface 30A has a plurality of first recesses 300A at positions corresponding to the plurality of first light emitting elements 23A, respectively.

[0024] The second incident surface 30B is an incident surface disposed opposite the second light source 2B. The second incident surface 30B has a plurality of second recesses 300B at positions corresponding to the plurality of second light emitting elements 23B, respectively.

[0025] The third incident surface 30C is an incident surface that is disposed opposite the third light source 2C. The third incident surface 30C has a plurality of third recesses 300C at positions corresponding to the plurality of third light emitting elements 23C, respectively.

[0026] The first recess 300A, the second recess 300B, and the third recess 300C are formed in a pyramidal or truncated pyramidal shape relative to the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C, respectively. FIGS. 1, 2, 3A, and 3B illustrate the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C formed in a truncated pyramidal shape. The first recess 300A, the second recess 300B, and the third recess 300C can be formed by any processing method. The shapes of the first recess 300A, the second recess 300B, and the third recess 300C are not limited to the above examples, and may, for example, have rounded ridges in the pyramidal or truncated pyramidal shape.

[0027] The opening areas of the first recess 300A, the second recess 300B, and the third recess 300C on the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C are preferably approximately the same as the element sizes of the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C. This allows light from the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C to be efficiently incident on the optical member 3A. The depths and bottom areas of the first recess 300A, the second recess 300B, and the third recess 300C may be set as appropriate.

[0028] A first wavelength converting member 301A that converts the wavelength of the light of the third color (blue) emitted from the first light-emitting element 23A into light of the first color (red) is disposed in the first recess 300A. Therefore, the third color (blue) is incident on the first incident surface 30A from the first light-emitting element 23A, but the light LA ​​that is incident on the first incident surface 30A from the first light-emitting element 23A and passes through the first recess 300A contains the first color (red) whose wavelength has been converted by the first wavelength converting member 301A.

[0029] In the second concave portion 300B, a second wavelength conversion member 301B is disposed which wavelength-converts the light of the third color (blue) emitted from the second light-emitting element 23B into the light of the second color (green). Therefore, the light of the third color (blue) from the second light-emitting element 23B is incident on the second incident surface 30B, but the light LB after being incident on the second incident surface 30B from the second light-emitting element 23B and passing through the second concave portion 300B includes the second color (green) wavelength-converted by the second wavelength conversion member 301B.

[0030] In the third concave portion 300C, a light guide member 302 is disposed which transmits the light of the third color (blue) emitted from the third light-emitting element 23C as it is. Therefore, the light of the third color (blue) from the third light-emitting element 23C is incident on the third incident surface 30C, but the light LC after being incident on the third incident surface 30C from the third light-emitting element 23C and passing through the third concave portion 300C is the third color (blue) as it is.

[0031] The refractive index n of the first wavelength conversion member 301A, the second wavelength conversion member 301B, and the light guide member 302 is preferably between the refractive index Na of air (= about 1) and the refractive index Nb of the optical member 3A. That is, the refractive index n preferably satisfies Na < n < Nb. Thereby, the light incident on the first wavelength conversion member 301A, the second wavelength conversion member 301B, and the light guide member 302 from the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C can be efficiently guided inside the optical member 3A. Note that the light guide member 302 may be omitted, and in that case, the third concave portion 300C functions as an air layer.

[0032] The reflective / transmissive film 31 is, for example, a dielectric film or a metal film, and functions as a dichroic mirror. In this embodiment, the reflective / transmissive film 31 is described as including a first reflective / transmissive film 31A and a second reflective / transmissive film 31B. As shown in FIG. 1, the first reflective / transmissive film 31A and the second reflective / transmissive film 31B are arranged on two diagonal lines that intersect at a right angle on the cross section of the optical member 3A. A first incident surface 30A and an exit surface 32 are arranged on one surface of the first reflective / transmissive film 31A, and a second incident surface 30B and a third incident surface 30C are arranged on the other surface of the first reflective / transmissive film 31A. A second incident surface 30B and an exit surface 32 are arranged on one surface of the second reflective / transmissive film 31B, and the first incident surface 30A and a third incident surface 30C are arranged on the other surface of the second reflective / transmissive film 31B.

[0033] The first reflective / transmissive film 31A has the property of reflecting light of a first color (red) and transmitting light other than the first color. The second reflective / transmissive film 31B has the property of reflecting light of a second color (green) and transmitting light other than the second color. After passing through the first recess 300A, the light LA ​​contains the first color (red), so at least a portion of the light LA ​​is reflected by the first reflective / transmissive film 31A and emitted from the exit surface 32 as part of the output light LO. After passing through the second recess 300B, the light LB contains the second color (green), so at least a portion of the light LB is reflected by the second reflective / transmissive film 31B and emitted from the exit surface 32 as part of the output light LO. After passing through the third recess 300C, the light LC is a third color (blue), so it transmits through the first reflective / transmissive film 31A and the second reflective / transmissive film 31B and is emitted from the exit surface 32 as part of the output light LO.

[0034] The exit surface 32 is disposed on a surface different from the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C. Light that is incident on the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C from the first light source 2A, the second light source 2B, and the third light source 2C and is reflected by or transmitted through the reflective / transmissive film 31 (the first reflective / transmissive film 31A and the second reflective / transmissive film 31B) is emitted from the exit surface 32 as outgoing light LO.

[0035] The first light source 2A, the second light source 2B, and the third light source 2C are fixed to the optical member 3A with fixing members such as screws or adhesives, while being positioned relative to the optical member 3A as shown in Fig. 1. In this case, a portion of the first light source 2A, a portion of the second light source 2B, and a portion of the third light source 2C are arranged in contact with the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C, respectively. The optical member 3A has a first positioning portion 33A provided on the first incident surface 30A to position the first light source 2A on the first incident surface 30A, a second positioning portion 33B provided on the second incident surface 30B to position the second light source 2B on the second incident surface 30B, and a third positioning portion 33C provided on the third incident surface 30C to position the third light source 2C on the third incident surface 30C.

[0036] The first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C are formed, for example, in a stepped shape, a convex shape such as a protrusion or streak, or a concave shape such as a hole or groove, and the first light source 2A, the second light source 2B, and the third light source 2C are positioned by abutting or fitting against them. 1, 2, 3A, and 3B show a case where the first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C are formed in a stepped shape, and the first light source 2A, the second light source 2B, and the third light source 2C are positioned by abutting against the stepped portions formed in the stepped shape. This reduces the positional misalignment between the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C and the first recess 300A, the second recess 300B, and the third recess 300C, so that light from the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C can be efficiently incident on the optical element 3A.

[0037] As shown in FIGS. 1, 2, 3A, and 3B, the optical member 3A may further include a first light-shielding member 34A provided on the first incident surface 30A to shield the light from areas other than the first recess 300A, a second light-shielding member 34B provided on the second incident surface 30B to shield the light from areas other than the second recess 300B, and a third light-shielding member 34C provided on the third incident surface 30C to shield the light from areas other than the third recess 300C. The first light-shielding member 34A and the second and third light-shielding members 34B and 34C are formed, for example, in a film shape using a light-shielding material. This prevents light from leaking to the outside from the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C.

[0038] 2, the optical member 3A may also have a light-shielding member 35 provided on the light-emitting surface 32. The light-shielding member 35 is formed, for example, in a film shape using a light-shielding material. In this case, the light-shielding member 35 has openings 350 narrower than the area through which the emitted light LO is emitted, and blocks the areas other than the openings 350. The light-shielding member 35 may have the same number of openings 350 as the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C, and the openings 350 are arranged in the same positions as the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C. That is, the openings 350 are arranged in the same positions as the first recesses 300A, the second recesses 300B, and the third recesses 300C on the light-emitting surface 32, and the same number of openings 350 are arranged in the same positions as the first recesses 300A, the second recesses 300B, and the third recesses 300C. This improves the contrast of the emitted light LO on the light-emitting surface 32.

[0039] Furthermore, the light emitting device 1A may include a control device 4 that controls the lighting states of the first light source 2A, the second light source 2B, and the third light source 2C. The control device 4 is electrically connected to the first light source 2A, the second light source 2B, and the third light source 2C via an electric cable (not shown). For example, when the control device 4 receives a command to turn on or off the light from a higher-level device (not shown), it transmits a lighting command or a lighting-off command to each of the first drive circuit 24A, the second drive circuit 24B, and the third drive circuit 24C.

[0040] The turn-on command for the first drive circuit 24A is configured to be able to specify the first light-emitting element 23A to be turned on and the brightness when the first light-emitting element 23A is turned on for each first light-emitting element 23A or for each group of first light-emitting elements 23A. The turn-off command for the first drive circuit 24A is configured to be able to specify the first light-emitting element 23A to be turned off for each first light-emitting element 23A or for each group of first light-emitting elements 23A.

[0041] The turn-on command for the second drive circuit 24B is configured to be able to specify the second light-emitting element 23B to be turned on and the brightness when the second light-emitting element 23B is turned on for each second light-emitting element 23B or for each group of second light-emitting elements 23B. The turn-off command for the second drive circuit 24B is configured to be able to specify the second light-emitting element 23B to be turned off for each second light-emitting element 23B or for each group of second light-emitting elements 23B.

[0042] The turn-on command for the third drive circuit 24C is configured to be able to specify the third light-emitting element 23C to be turned on and the brightness when the third light-emitting element 23C is turned on for each third light-emitting element 23C or for each group of third light-emitting elements 23C. The turn-off command for the third drive circuit 24C is configured to be able to specify the third light-emitting element 23C to be turned off for each third light-emitting element 23C or for each group of third light-emitting elements 23C.

[0043] (Configuration of the first light source 2A, the second light source 2B, and the third light source 2C) In the following, the common configuration of the first light source 2A, the second light source 2B, and the third light source 2C will be described as the light source 2.

[0044] 4 and 5 are a perspective view and a plan view showing an example of the light source 2. Fig. 6 is an enlarged plan view of a portion VI shown in Fig. 5. Fig. 7 is a cross-sectional view taken along line VII-VII shown in Fig. 5. Fig. 8 is an enlarged cross-sectional view of a portion VIII shown in Fig. 7.

[0045] The light source 2 includes a package substrate 21, a submount substrate 22 arranged on the package substrate 21, a plurality of light-emitting elements 23 arranged on the submount substrate 22 at a predetermined element spacing L, a drive circuit 24 built into the submount substrate 22 and driving the plurality of light-emitting elements 23 to light up individually or in groups, a plurality of wires 25 electrically connecting the package substrate 21 and the submount substrate 22, a light-reflective member 26 arranged in the gaps between the plurality of light-emitting elements 23 on the submount substrate 22, a light-diffusing member 27 arranged on the plurality of light-emitting elements 23, and a covering member 28 that covers the plurality of wires 25.

[0046] The submount substrate 22 corresponds to the first substrate 20A, the second substrate 20B, and the third substrate 20C shown in Fig. 1. The light-emitting element 23 corresponds to the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C shown in Fig. 1. The drive circuit 24 corresponds to the first drive circuit 24A, the second drive circuit 24B, and the third drive circuit 24C shown in Fig. 1. For ease of explanation, the light diffusing member 27 and the covering member 28 are partially omitted in Figs. 4 and 5, and only the submount substrate 22, the light-emitting element 23, the wires 25, and the like are partially visible.

[0047] The package substrate 21 is, for example, a printed wiring board. The package substrate 21 includes a flat base 210, a plurality of first terminals 211 disposed on an upper surface 210a of the base 210 and connected to wires 25, and first wirings 212 disposed on the upper surface 210a and inside the base 210. The package substrate 21 may also include a plurality of pads (not shown) disposed on a lower surface 210b of the base 210 and connected to the first terminals 211 and the first wirings 212. The base 210 may be made of, for example, a resin material, a ceramic material, a glass epoxy material, a metal material such as gold, silver, or copper, graphene, or a composite material thereof. However, if a conductive material is used, partial insulation treatment is required as necessary. The first terminals 211, the first wirings 212, and the pads may be made of, for example, a metal material such as copper or gold. The first terminal 211, the first wiring 212, and the pad may be in a single layer or in multiple layers.

[0048] In this embodiment, the base 210 has a rectangular shape in a plan view. The base 210 has, in the center of its upper surface 210a, a rectangular substrate placement area 213 where the submount substrate 22 is placed. Outside the substrate placement area 213 in the Y direction, a plurality of first terminals 211 are arranged at predetermined intervals in the X direction.

[0049] The submount substrate 22 is, for example, a semiconductor substrate with an integrated circuit built in. The semiconductor material included in the submount substrate 22 can be, for example, silicon. The submount substrate 22 includes, for example, a flat base 220, a plurality of second terminals 221 disposed on an upper surface 220a of the base 220 and connected to the wires 25, and second wiring (not shown) disposed inside the base 220. The material of the second terminals 221 and the second wiring can be, for example, a metal material such as copper.

[0050] The submount substrate 22 is bonded to the substrate placement region 213 of the base 210 via a substrate bonding member (not shown). The substrate bonding member may be made of, for example, an Ag sintered body, a Cu sintered body, solder, or an adhesive resin. The substrate placement region 213 may be made of a metal material with heat dissipation properties. This can improve the heat dissipation properties of the light source 2.

[0051] In this embodiment, the base 220 is rectangular in plan view. The base 220 has a rectangular element placement region 223 in which multiple light-emitting elements 23 are placed, in the center of its upper surface 220a. When adjacent light-emitting elements 23 are spaced apart from each other, the element placement region 223 can be defined by lines (dashed lines in FIG. 6) drawn at a fixed interval (e.g., half the length of the gap between adjacent light-emitting elements 23) on the outer surfaces of the light-emitting elements 23 located at the outermost periphery, as shown in FIG. 6. When adjacent light-emitting elements 23 are arranged in contact with each other, the element placement region 223 can be defined by lines connecting the outer surfaces (surfaces not facing the adjacent light-emitting elements 23) of the light-emitting elements 23 located at the outermost periphery in plan view. A plurality of pads (not shown) are arranged in the element placement region 223, and the multiple light-emitting elements 23 are respectively mounted on the pads and bonded to each other by an element bonding material 222 such as copper (Cu). Outside the element placement region 223 in the Y direction, a plurality of second terminals 221 are arranged at predetermined intervals in the X direction.

[0052] The plurality of light-emitting elements 23 are, for example, elements that emit light of any wavelength from the upper surface 230, and are configured with light-emitting diodes (LEDs), semiconductor laser elements, or the like. The upper surface 230 of the light-emitting elements 23 is, for example, a square with each side measuring approximately 40 to 50 μm, and the thickness of the light-emitting elements 23 is approximately 5 to 10 μm. The material of the light-emitting elements 23 that emit blue or green light can be nitride semiconductors such as GaN, InGaN, and AlGaN, ZnSe, or GaP. The material of the light-emitting elements 23 that emit red light can be GaAlAs, AlInGaP, or the like.

[0053] The plurality of light-emitting elements 23 are arranged in the element arrangement region 223 of the submount substrate 22 at a predetermined element spacing L, and are electrically connected to pads of the submount substrate 22. In the examples of Figures 4 to 8, the light-emitting elements 23 are arranged in a matrix form with 256 elements arranged in the X direction and 64 elements arranged in the Y direction (total number of elements: 16,384). The element size S on the upper surface 230 of the light-emitting elements 23 is a square with each side 45 µm, and the element spacing L in both the X and Y directions is 50 µm.

[0054] The driving circuit 24 is built into the submount substrate 22 and is configured by, for example, an integrated circuit. The driving circuit 24 is connected to each of the plurality of light-emitting elements 23 via second wiring. Instead of being built into the submount substrate 22, the driving circuit 24 may be built into the package substrate 21 or may be mounted on the upper surface 210a of the package substrate 21.

[0055] When the drive circuit 24 receives a light-on command or a light-off command from the control device 4, it controls the light source 2 to be turned on or off in accordance with the light-on command or the light-off command. In the case of a light-on command, the drive circuit 24 controls the drive amount (drive current or drive voltage) of the light-emitting element 23 designated as the light-on target by the light-on command to turn on the light. At that time, the drive circuit 24 controls the drive amount so as to achieve the brightness designated by the light-on command. In the case of an off command, the drive circuit 24 controls the drive amount of the light-emitting element 23 designated as the light-off target by the off command to turn off the light.

[0056] The multiple wires 25 are members for electrically connecting the first terminals 211 of the package substrate 21 and the second terminals 221 of the submount substrate 22. The wires 25 are arranged along the Y direction so as to straddle the outer edge of the submount substrate 22. The wires 25 may be made of, for example, gold (Au).

[0057] 8, the light-reflecting members 26 are disposed in the gaps between the side surfaces 232 of adjacent light-emitting elements 23 and in the gaps between the upper surface 220a of the submount substrate 22 and the lower surface 231 of the light-emitting elements 23. The light-reflecting members 26 have light reflectivity and are made of, for example, a material containing a particulate light-reflecting material in a base material made of a light-transmitting resin. The base material of the light-reflecting members 26 can be, for example, a resin such as a silicone resin, an epoxy resin, or an acrylic resin. The light-reflecting material of the light-reflecting members 26 can be, for example, titanium oxide, aluminum oxide, or the like.

[0058] The light diffusing member 27 is disposed so as to cover the upper surfaces 230 of the plurality of light emitting elements 23 and the upper surface of the light reflecting member 26. The light diffusing member 27 has light transmissivity and light diffusing properties, and is made of, for example, a material containing a particulate light diffusing material in a base material made of a light transmissive resin. The base material of the light diffusing member 27 can be, for example, the same material as the base material of the light reflecting member 26 described above. The light diffusing material of the light diffusing member 27 can be, for example, the same material as the light reflecting material of the light reflecting member 26 described above.

[0059] The light diffusing member 27 has an upper surface 270 and a lower surface 271 located on the opposite side of the upper surface 270. When at least one of the plurality of light emitting elements 23 located on the lower surface 271 side of the light diffusing member 27 is turned on, light from the turned-on light emitting element 23 is incident on the lower surface 271. The light incident on the lower surface 271 is diffused (and may be wavelength-converted) by passing through the inside of the light diffusing member 27, and is emitted from at least a part of the upper surface 270.

[0060] 7, covering member 28 is disposed from upper surface 210a of package substrate 21 to upper surface 220a of submount substrate 22, and covers first terminals 211 and wires 25 of package substrate 21, and second terminals 221 of submount substrate 22. Covering member 28 includes an outer resin frame 280 disposed in a frame shape on package substrate 21, an inner resin frame 281 disposed in a frame shape on submount substrate 22, and protective resin 282 disposed between outer resin frame 280 and inner resin frame 281 to cover and protect wires 25.

[0061] The covering member 28 is made of, for example, a material that has light-blocking properties and contains a particulate light-absorbing or light-reflecting material in a base material made of a light-transmitting resin. The base material of the covering member 28 can be, for example, the same material as the base material of the light-reflecting member 26 described above. The light-absorbing material of the covering member 28 can be, for example, carbon black, graphite, etc. The light-reflecting material of the covering member 28 can be, for example, the same material as the light-reflecting material of the light-reflecting member 26. The covering member 28 may contain both a light-absorbing agent and a light-reflecting material.

[0062] The light source 2 may or may not include a protective film disposed on the covering member 28 so as to cover the light diffusing member 27. Furthermore, the light reflective member 26, the light diffusing member 27, and the covering member 28 may contain a colorant, a filler for adjusting viscosity, or the like, as needed.

[0063] In the light emitting device 1A having the above configuration, when the control device 4 receives a lighting command from a higher-level device, it transmits a lighting command to each of the first drive circuit 24A, the second drive circuit 24B, and the third drive circuit 24C. When the first drive circuit 24A, the second drive circuit 24B, and the third drive circuit 24C light up the first light emitting element 23A, the second light emitting element 23B, and the third light emitting element 23C to be lit in response to the respective lighting commands, light of the third color (blue) is emitted from the first light emitting element 23A, the second light emitting element 23B, and the third light emitting element 23C.

[0064] The third color (blue) light emitted from the first light-emitting element 23A is incident on the first incident surface 30A and is wavelength-converted into the first color (red) light LA ​​when passing through the first wavelength converting member 301A. The first color (red) light LA ​​passes through the second reflective / transmissive film 31B and is reflected by the first reflective / transmissive film 31A, and is then emitted from the exit surface 32 as part of the emitted light LO.

[0065] The third color (blue) light emitted from the second light-emitting element 23B is incident on the second incident surface 30B and is wavelength-converted into second color (green) light LB when passing through the second wavelength converting member 301B. The second color (green) light LB passes through the first reflective / transmissive film 31A and is reflected by the second reflective / transmissive film 31B, and is then emitted from the exit surface 32 as part of the emitted light LO.

[0066] The third color (blue) light emitted from the third light-emitting element 23C is incident on the third incident surface 30C, passes through the light-guiding member 302, and travels inside the optical member 3A as third color (blue) light LC. The third color (blue) light LC passes through the first reflective / transmissive film 31A and the second reflective / transmissive film 31B, and is then emitted from the exit surface 32 as part of the emitted light LO.

[0067] As a result of the above, output light LO, which is a mixture of the first color light LA, the second color light LB, and the third color light LC, is output from the output surface 32 of the optical member 3A. By changing the lighting positions and brightness of the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C, it is possible to output full-color output light LO.

[0068] As described above, in the light emitting device 1A according to this embodiment, when light from the plurality of first light emitting elements 23A is incident on the plurality of first recesses 300A of the first incident surface 30A of the optical member 3A, and light from the plurality of second light emitting elements 23B is incident on the plurality of second recesses 300B of the second incident surface 30B of the optical member 3A, each light passes through the reflective / transmissive film 31 of the optical member 3A and is emitted as emitted light LO from the emission surface 32 of the optical member 3A. Therefore, even if no optical component other than the optical member 3A is disposed between each light source 2 and the optical member 3A, each light from each light source 2 can be emitted as emitted light LO from the emission surface 32 of the optical member 3A. This allows the light emitting device 1A to be made smaller and less expensive.

[0069] Furthermore, by disposing the first wavelength conversion member 301A, the second wavelength conversion member 301B, and the light guiding member 302 in the first recess 300A, the second recess 300B, and the third recess 300C of the optical member 3A, respectively, it is possible to use a common light source 2 for the first light source 2A, the second light source 2B, and the third light source 2C. This allows for standardization of parts.

[0070] (Second embodiment) Fig. 9 is a diagram showing the overall configuration of a light emitting device 1B according to the second embodiment, and Fig. 10 is a diagram showing a part of the configuration of a light emitting device 1B according to the second embodiment.

[0071] In the first embodiment, the optical member 3A has been described as having a first wavelength conversion member 301A and a second wavelength conversion member 301B as wavelength conversion members that convert the wavelength of light of the third color (blue) into light other than the third color. In contrast, in the second embodiment, the first light source 2A and the second light source 2B each include a wavelength conversion member that converts the wavelength of light of the third color (blue) into light of a color other than the third color. Since the other basic configurations are the same as those of the light emitting device 1A according to the first embodiment, the following description will mainly focus on the differences between the two.

[0072] The first light source 2A has a first wavelength conversion member 27A that converts the wavelength of light of the third color (blue) into light of the first color (red).

[0073] The second light source 2B has a second wavelength conversion member 27B that converts the wavelength of the light of the third color (blue) into the light of the second color (green).

[0074] The first wavelength conversion member 27A and the second wavelength conversion member 27B are arranged to cover the first light emitting element 23A and the second light emitting element 23B, respectively, similarly to the light diffusing member 27 according to the first embodiment (see, for example, FIGS. 5 and 7). The first wavelength conversion member 27A and the second wavelength conversion member 27B can be made of, for example, a material in which a particulate phosphor is contained in a base material made of a light-transmitting resin. The phosphor contained in the first wavelength conversion member 27A is a phosphor that absorbs blue light from the first light emitting element 23A and emits red light. The phosphor contained in the second wavelength conversion member 27B is a phosphor that absorbs blue light from the second light emitting element 23B and emits green light.

[0075] Similar to the light-guiding member 302 according to the first embodiment, a first light-guiding member 302A, a second light-guiding member 302B, and a third light-guiding member 302C are respectively arranged in the first recess 300A, the second recess 300B, and the third recess 300C. In this case, the refractive index n of the first light-guiding member 302A, the second light-guiding member 302B, and the third light-guiding member 302C is preferably between the refractive index Na of air (=approximately 1) and the refractive index Nb of the optical member 3B. Note that the first light-guiding member 302A, the second light-guiding member 302B, and the third light-guiding member 302C may be omitted. In this case, the first recess 300A, the second recess 300B, and the third recess 300C function as air layers.

[0076] In light emitting device 1B having the above configuration, when control device 4 receives a lighting command from a higher-level device, it transmits a lighting command to each of first drive circuit 24A, second drive circuit 24B, and third drive circuit 24C. When first drive circuit 24A, second drive circuit 24B, and third drive circuit 24C light up first light emitting element 23A, second light emitting element 23B, and third light emitting element 23C to be lit in response to the respective lighting commands, light of a third color (blue) is emitted from first light emitting element 23A, second light emitting element 23B, and third light emitting element 23C.

[0077] The third color (blue) light emitted from the first light-emitting element 23A is wavelength-converted to the first color (red) light by the first wavelength converting member 27A, and then enters the first incident surface 30A, passes through the first light-guiding member 302A, and travels inside the optical member 3B as the first color (red) light LA. The first color (red) light LA ​​passes through the second reflective / transmissive film 31B and is reflected by the first reflective / transmissive film 31A, and is thereby emitted from the exit surface 32 as part of the emitted light LO.

[0078] The third color (blue) light emitted from the second light-emitting element 23B is wavelength-converted to the second color (green) light by the second wavelength converting member 27B, then enters the second incident surface 30B, passes through the second light-guiding member 302B, and travels inside the optical member 3B as second color (green) light LB. The second color (green) light LB passes through the first reflective / transmissive film 31A and is reflected by the second reflective / transmissive film 31B, and is emitted from the exit surface 32 as part of the output light LO.

[0079] The third color (blue) light emitted from the third light-emitting element 23C is incident on the third incident surface 30C, passes through the light-guiding member 302, and travels inside the optical member 3B as third color (blue) light LA. The third color (blue) light LC passes through the first reflective / transmissive film 31A and the second reflective / transmissive film 31B, and is emitted from the exit surface 32 as part of the emitted light LO.

[0080] As a result of the above, output light LO, which is a mixture of the first color light LA, the second color light LB, and the third color light LC, is output from the output surface 32 of the optical member 3B. By changing the lighting positions and brightness of the first light-emitting element 23A, the second light-emitting element 23B, and the third light-emitting element 23C, it is possible to output full-color output light LO.

[0081] As described above, according to the light emitting device 1B of this embodiment, similar to the first embodiment, it is possible to reduce the size and cost of the light emitting device 1B.

[0082] (Third embodiment) Fig. 11 is an overall configuration diagram showing a light emitting device 1C according to a third embodiment. Fig. 12A is a partial configuration diagram showing a first light source 2A and an optical member 3A in the light emitting device 1C according to the third embodiment before positioning. Fig. 12B is a partial configuration diagram showing a first light source 2A and an optical member 3A in the light emitting device 1C according to the third embodiment after positioning.

[0083] In the first embodiment, the optical member 3A has been described as having the first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C, each of which is formed in a stepped shape. In contrast, in the third embodiment, the optical member 3C has the first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C, each of which is formed in a concave shape. Since the other basic configurations are the same as those of the light emitting device 1A according to the first embodiment, the following description will mainly focus on the differences between the two.

[0084] Covering members 28 (see FIGS. 7, 12A, and 12B) of first light source 2A, second light source 2B, and third light source 2C have protrusions 283 that fit into first positioning portion 33A, second positioning portion 33B, and third positioning portion 33C, respectively. The height of covering member 28 may be set to be flush with upper surface 270 of light diffusing member 27, or may be set to be lower than upper surface 270.

[0085] The first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C of the optical member 3C are each formed in a concave shape and are, for example, formed by holes formed in the first incident surface 30A, the second incident surface 30B, and the third incident surface 30C. The number of holes formed in the concave shape is two or more. FIGS. 11 , 12A, and 12B illustrate a case where the first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C are formed in a concave shape, and the protrusions 283 of the first light source 2A, the second light source 2B, and the third light source 2C are fitted into the holes formed in the concave shape, thereby positioning the first light source 2A, the second light source 2B, and the third light source 2C.

[0086] As described above, according to the light emitting device 1C of this embodiment, it is possible to achieve a reduction in size and cost of the light emitting device 1B, as in the first embodiment.

[0087] (Fourth embodiment) FIG. 13 is a diagram showing the overall configuration of a light emitting device 1D according to the fourth embodiment.

[0088] In the first embodiment, the light emitting device 1A is described as having three light sources 2, namely, the first light source 2A, the second light source 2B, and the third light source 2C. In contrast, in the fourth embodiment, the light emitting device 1D is described as having two light sources 2, namely, the first light source 2A and the second light source 2B. The other basic configurations are the same as those of the light emitting device 1A according to the first embodiment, and the explanation of the third light source 2C omitted in the first embodiment can be referred to as an explanation of the configuration of the light emitting device 1D according to the fourth embodiment. Therefore, the following description will mainly focus on the differences between the two.

[0089] The optical member 3D has a reflective / transmissive film 31 therein, and also has a first incident surface 30A arranged opposite the first light source 2A, a second incident surface 30B arranged opposite the second light source 2B, and an exit surface 32. The second incident surface 30B and the exit surface 32 are arranged on opposite sides of the outer surface of the optical member 3D. The first incident surface 30A and the exit surface 32 are arranged on one side of the reflective / transmissive film 31, and the second incident surface 30B is arranged on the other side of the reflective / transmissive film 31.

[0090] In the light emitting device 1D having the above configuration, when the control device 4 receives a lighting command from a higher-level device, it transmits a lighting command to each of the first drive circuit 24A and the second drive circuit 24B. The first drive circuit 24A and the second drive circuit 24B light up the first light emitting element 23A and the second light emitting element 23B to be lit in response to the respective lighting commands, causing the first light emitting element 23A and the second light emitting element 23B to emit light of a third color.

[0091] The third color light emitted from the first light-emitting element 23A is incident on the first incident surface 30A and is wavelength-converted to the first color light LA ​​when passing through the first wavelength converting member 301A. The first color light LA ​​passes through the second reflective / transmissive film 31B and is reflected by the first reflective / transmissive film 31A, and is then emitted from the exit surface 32 as part of the emitted light LO.

[0092] The third color light emitted from the second light-emitting element 23B is incident on the second incident surface 30B and is wavelength-converted to second color light LB when passing through the second wavelength converting member 301B. The second color light LB passes through the first reflective / transmissive film 31A and is reflected by the second reflective / transmissive film 31B, and is then emitted from the exit surface 32 as part of the emitted light LO.

[0093] As a result of the above, the exit surface 32 of the optical member 3A outputs the exit light LO, which is a mixture of the first color light LA ​​and the second color light LB.

[0094] As described above, according to the light emitting device 1D of this embodiment, it is possible to achieve a reduction in size and cost of the light emitting device 1B, as in the first embodiment.

[0095] (Other embodiments) Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be modified as appropriate within the scope of the technical concept of the present invention.

[0096] In the above embodiments, the features of the light emitting devices 1A to 1D in each embodiment have been described. However, the features of each embodiment may be combined as appropriate. For example, the light emitting device 1D according to the fourth embodiment may be combined with the features of the second embodiment, or the features of the third embodiment. Furthermore, the light emitting device 1B according to the second embodiment may be combined with the features of the third embodiment.

[0097] In the above embodiments, the light emitting devices 1A to 1D in each embodiment have been described as having two or three light sources 2. However, the light emitting devices 1A to 1D may have four or more light sources 2. In this case, the optical members 3A to 3D may each have an incident surface disposed opposite to each light source 2.

[0098] In the above embodiments, the light-emitting element 23 in each embodiment has been described as emitting blue light. However, the light-emitting element 23 may emit light other than blue. For example, in the light-emitting device 1A according to the first embodiment, the first light-emitting element 23A may emit red light, the second light-emitting element 23B may emit green light, and the third light-emitting element 23C may emit blue light. In this case, the first light-guiding member 302A, the second light-guiding member 302B, and the third light-guiding member 302C may be disposed in the first recess 300A, the second recess 300B, and the third recess 300C of the optical member 3A, respectively, as in the second embodiment.

[0099] In the above embodiment, the first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C are described as physical structures. However, the first positioning portion 33A, the second positioning portion 33B, and the third positioning portion 33C may be alignment marks that can be detected by a detection means such as a camera provided in the manufacturing apparatus. In this case, the detection results when the alignment marks are detected by the manufacturing apparatus may be used by an assembly robot that positions the light source 2 on the optical members 3A to 3D.

[0100] In the above embodiment, the outer shape of the light-emitting element 23 is rectangular in plan view. However, the outer shape of the light-emitting element 23 is not limited to a rectangular shape, and may be any polygonal shape other than a rectangular (quadrilateral) shape, or may be a shape including curves. Furthermore, in the above embodiment, the outer shape of the element arrangement region 223 is described as being rectangular in plan view. However, the outer shape of the element arrangement region 223 is not limited to a rectangular shape, and may be any polygonal shape other than a rectangular (quadrilateral) shape, or may be a shape including curves.

[0101] Through the contents described so far in this specification, the following technical matters are disclosed. (Section 1) a first light source having a plurality of first light emitting elements that can be driven individually or in groups; a second light source having a plurality of second light emitting elements that can be driven individually or in groups; an optical member having a reflective / transmissive film therein, and including a first incident surface disposed opposite the first light source, a second incident surface disposed opposite the second light source, and an exit surface from which light from the first light source and the second light source is incident on the first incident surface and the second incident surface and is reflected by or transmitted through the reflective / transmissive film and exits as exit light, the first incident surface has a plurality of first recesses at positions corresponding to the plurality of first light-emitting elements, respectively, and light that is incident on the first incident surface and passes through the first recesses has a first color; the second incident surface has a plurality of second recesses at positions corresponding to the plurality of second light-emitting elements, respectively, and light that is incident on the second incident surface and passes through the second recesses has a second color. Light-emitting device. (Section 2) a light guide member is disposed in each of the first recess and the second recess, The refractive index of the light guiding member is between the refractive index of air and the refractive index of the optical member. Item 1. The light-emitting device according to item 1. (Section 3) the plurality of first light-emitting elements and the plurality of second light-emitting elements each emit blue light, a first wavelength conversion member that converts the wavelength of blue light into the first color light is disposed in the first recess; A second wavelength conversion member that converts the wavelength of blue light into the second color light is disposed in the second recess. Item 1. The light-emitting device according to item 1. (Section 4) the plurality of first light-emitting elements and the plurality of second light-emitting elements each emit blue light, the first light source has a first wavelength conversion member that converts the wavelength of blue light into the first color light, The second light source has a second wavelength conversion member that converts the wavelength of blue light into the second color light. Item 1 or 2. The light-emitting device according to item 1 or 2. (Section 5) The optical member is a first light-shielding member provided on the first incident surface and blocking light from a portion other than the first recess; a second light-shielding member provided on the second incident surface and blocking light from a portion other than the second recess; having Item 10. The light emitting device according to any one of items 1 to 4. (Section 6) the optical member has a light blocking member provided on the light exit surface, the light-blocking member has an opening narrower than the range through which the emitted light is emitted, and blocks light from the area other than the opening. Item 6. The light emitting device according to any one of items 1 to 5. (Section 7) The first recess and the second recess are formed in a pyramidal or truncated pyramidal shape relative to the first incident surface and the second incident surface, respectively. Item 7. The light emitting device according to any one of items 1 to 6. (Section 8) a portion of the first light source and a portion of the second light source are disposed in contact with the first incident surface and the second incident surface, respectively; The optical member is a first positioning portion provided on the first incident surface and configured to position the first light source on the first incident surface; a second positioning portion provided on the second incident surface and configured to position the second light source on the second incident surface; Item 8. The light emitting device according to any one of items 1 to 7. (Section 9) a third light source having a plurality of third light-emitting elements that can be driven individually or in groups; the optical member further has a third incident surface disposed opposite to the third light source, the exit surface is configured so that light beams incident on the first entrance surface, the second entrance surface, and the third entrance surface from the first light source, the second light source, and the third light source, and reflected or transmitted through the reflective / transmissive film, are emitted as exit light; the third incident surface has a plurality of third recesses at positions corresponding to the plurality of third light-emitting elements, respectively, and light that is incident on the third incident surface and passes through the third recesses has a third color. Item 9. The light emitting device according to any one of items 1 to 8. [Explanation of symbols]

[0102] Reference Signs List 1A to 1D... light emitting device, 2... light source, 2A... first light source, 2B... second light source, 2C... third light source, 3A to 3D... optical member, 4... control device, 20A... first substrate, 20B... second substrate, 20C... third substrate, 23... light emitting element, 23A... first light emitting element, 23B... second light emitting element, 23C... third light emitting element, 24... drive circuit, 24A... first drive circuit, 24B... second drive circuit, 24C... third drive circuit, 27... light diffusing member, 27A... first wavelength conversion member, 27B... second wavelength conversion member, 30A... first incident surface, 30B... second incident surface, 30C... third incident surface Light-emitting surface, 31...reflective / transmissive film, 31A...first reflective / transmissive film, 31B...second reflective / transmissive film, 32...light-emitting surface, 33A...first positioning portion, 33B...second positioning portion, 33C...third positioning portion, 34A...first light-blocking member, 34B...second light-blocking member, 34C...third light-blocking member, 35...light-blocking member, 300A...first recess, 300B...second recess, 300C...third recess, 301A...first wavelength conversion member, 301B...second wavelength conversion member, 302...light-guiding member, 302A...first light-guiding member, 302B...second light-guiding member, 302C...third light-guiding member, 350...opening

Claims

1. a first light source having a plurality of first light emitting elements that can be driven individually or in groups; a second light source having a plurality of second light emitting elements that can be driven individually or in groups; an optical member having a reflective / transmissive film therein, and including a first incident surface disposed opposite the first light source, a second incident surface disposed opposite the second light source, and an exit surface from which light from the first light source and the second light source is incident on the first incident surface and the second incident surface and is reflected by or transmitted through the reflective / transmissive film, and exits as exit light; the first incident surface has a plurality of first recesses at positions corresponding to the plurality of first light-emitting elements, respectively, and light that is incident on the first incident surface and passes through the first recesses has a first color; the second incident surface has a plurality of second recesses at positions corresponding to the plurality of second light-emitting elements, respectively, and light that is incident on the second incident surface and passes through the second recesses has a second color. Light-emitting device.

2. a light guide member is disposed in each of the first recess and the second recess, The refractive index of the light guiding member is between the refractive index of air and the refractive index of the optical member. The light emitting device according to claim 1 .

3. the plurality of first light-emitting elements and the plurality of second light-emitting elements each emit blue light, a first wavelength conversion member that converts the wavelength of blue light into the first color light is disposed in the first recess; A second wavelength conversion member that converts the wavelength of blue light into the second color light is disposed in the second recess. The light emitting device according to claim 1 .

4. the plurality of first light-emitting elements and the plurality of second light-emitting elements each emit blue light, the first light source has a first wavelength conversion member that converts the wavelength of blue light into the first color light, the second light source has a second wavelength conversion member that converts the wavelength of blue light into the second color light; The light emitting device according to claim 1 .

5. The optical member is a first light-shielding member provided on the first incident surface and blocking light from a portion other than the first recess; a second light-shielding member provided on the second incident surface and configured to shield a portion other than the second recess from light; having The light emitting device according to claim 1 .

6. the optical member has a light blocking member provided on the light exit surface, the light-blocking member has an opening narrower than the range through which the emitted light is emitted, and blocks light from the area other than the opening. The light emitting device according to claim 1 .

7. the first recess and the second recess are formed in a pyramidal or truncated pyramidal shape with respect to the first incident surface and the second incident surface, respectively; The light emitting device according to claim 1 .

8. a portion of the first light source and a portion of the second light source are disposed in contact with the first incident surface and the second incident surface, respectively; The optical member is a first positioning portion provided on the first incident surface and configured to position the first light source on the first incident surface; a second positioning portion provided on the second incident surface and configured to position the second light source on the second incident surface; The light emitting device according to claim 1 .

9. a third light source having a plurality of third light-emitting elements that can be driven individually or in groups; the optical member further has a third incident surface disposed opposite to the third light source, the exit surface is configured so that light beams incident on the first entrance surface, the second entrance surface, and the third entrance surface from the first light source, the second light source, and the third light source, and reflected or transmitted through the reflective / transmissive film, are emitted as exit light beams, the third incident surface has a plurality of third recesses at positions corresponding to the plurality of third light-emitting elements, respectively, and light that is incident on the third incident surface and passes through the third recesses has a third color. The light emitting device according to claim 1 .

Images