Light-emitting device, light source selection method, and method for manufacturing light-emitting device

Abstract

To provide a light-emitting device that can make effective use of a light-emitting device determined to be a defective article.SOLUTION: A light-emitting device 1A comprises a first light source 2A, a second light source 2B, and an optical member 3. The first light source 2A includes a plurality of first light-emitting elements 23A, each including a first lightable element 23A-1 that can be lit up and a first unlightable element 23A-2 that cannot be lit up. The second light source 2B includes a plurality of second light-emitting elements 23B, each including a second lightable element 23B-1 that can be lit up and a second unlightable element 23B-2 that cannot be lit up. The optical member 3 controls light emitted from the first light source 2A and light emitted from the second light source 2B so that a predetermined irradiation area 30 is irradiated with the light emitted from the first light source 2A and the light emitted from the second light source 2B. The second light source 2B comprises the second lightable element 23B-1 that is arranged at a second element position where the same can emit light to an unlightable position in the irradiation area 30 where the first light source 2A cannot emit light with the first unlightable element 23A-2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a light emitting device, a light source selection method, and a method for manufacturing a light emitting device. [Background technology]

[0002] Conventionally, light emitting devices equipped with a large number of light emitting elements have been used as light sources for various applications. For example, Patent Document 1 discloses a light emitting device in which a plurality of light emitting elements are arranged on a substrate and the plurality of light emitting elements can be individually turned on. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-212301 A Summary of the Invention [Problem to be solved by the invention]

[0004] When a plurality of light-emitting elements in a light-emitting device are turned on, a light-emitting element that does not light for some reason or a light-emitting element that lights up but does not exceed a predetermined reference value is determined to be a defective element. If a light-emitting element that is not determined to be a defective element is considered to be a normal element, and the ratio of normal elements to the total number of light-emitting elements in the light-emitting device (hereinafter referred to as the "lighting rate") does not exceed a predetermined judgment value, the light-emitting device itself is determined to be defective. Light-emitting devices determined to be defective in this way are discarded, resulting in a decrease in yield. Even if the materials and parts used in a light-emitting device determined to be defective can be recycled, recycling costs are required.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide a light-emitting device, a light source selection method, and a method for manufacturing a light-emitting device that enable effective utilization of a light-emitting device that has been determined to be defective. [Means for solving the problem]

[0006] A light emitting device according to one aspect of the present invention comprises: a first light source including a first substrate, a plurality of first light-emitting elements arranged at each first element position on the first substrate at a predetermined element interval, and a first drive circuit that drives and lights the first light-emitting elements individually, the plurality of first light-emitting elements including first light-enabled elements that can be lit by the first drive circuit and first non-light-enabled elements that cannot be lit by the first drive circuit; a second light source including a second substrate, a plurality of second light-emitting elements arranged at each second element position on the second substrate at the element interval, and a second drive circuit that drives and lights the second light-emitting elements individually, the plurality of second light-emitting elements including second light-enabled elements that can be lit by the second drive circuit and second non-light-enabled elements that cannot be lit by the second drive circuit; an optical member that controls the light emitted from the first light source and the second light source so that the light emitted from the first light source and the second light source is irradiated onto a predetermined irradiation area; The second light source includes a second light-enabled element arranged at a second element position capable of emitting light to a non-light-enabled position in the irradiation area where light from the first light source is not emitted by the first non-light-enabled element.

[0007] Further, a light source selection method according to another aspect of the present invention includes the steps of: A light source selection method for selecting a combination of a first light source and a second light source to be used in a light emitting device that controls light emitted from a first light source and a second light source by an optical member and illuminates a predetermined illumination area, comprising: a data acquisition step of acquiring data for each of a plurality of light sources, each of which includes a substrate, a plurality of light-emitting elements arranged at respective element positions on the substrate at a predetermined element interval, and a drive circuit for individually driving and lighting the light-emitting elements, the data indicating element positions at which light-enabled elements that can be turned on by the drive circuit are arranged and element positions at which non-light-enabled elements that cannot be turned on by the drive circuit are arranged; a first light source selection step of selecting a first light source from the plurality of light sources; a second light source selection step of selecting, from among the plurality of light sources, a second light source to be combined with the first light source selected in the first light source selection step, based on the data for each of the light sources acquired in the data acquisition step; The second light source selection step includes: A light source having the light-enabled element arranged at an element position capable of emitting light relative to a non-light-enabled position in the illumination area at which light from the first light source is not emitted due to the non-light-enabled element of the first light source is selected as the second light source.

[0008] In addition, a method for manufacturing a light emitting device according to another aspect of the present invention includes the steps of: a preparation step of preparing the first light source and the second light source selected as the combination by the light source selection method, and the optical member; and an assembling step of adjusting a positional relationship between the first light source and the second light source prepared in the preparing step and the optical member, to assemble the light emitting device. Effect of the Invention

[0009] According to the light emitting device, the light source selection method, and the method for manufacturing a light emitting device according to the above aspects of the present invention, a light emitting device that has been determined to be defective can be effectively utilized. [Brief description of the drawings]

[0010] [Figure 1] 1 is a schematic overall view showing an example of a light emitting device 1A according to a first embodiment. [Diagram 2] 2 is a schematic diagram showing a relationship between a first light source 2A and a second light source 2B and an illumination region 30 according to the first embodiment. FIG. [Diagram 3] FIG. 2 is a perspective view showing an example of a light source 2. [Figure 4] FIG. 2 is a plan view showing an example of a light source 2. [Diagram 5] FIG. 5 is an enlarged plan view of a V portion shown in FIG. [Figure 6] 6 is a cross-sectional view taken along the line VI-VI shown in FIG. [Figure 7]FIG. 7 is an enlarged cross-sectional view of part VII shown in FIG. [Figure 8] FIG. 2 is a block diagram showing an example of a light source selecting device 5. [Figure 9] 1 is a flowchart illustrating an example of a light source selection method. [Figure 10] 1 is a flowchart showing an example of a method for manufacturing the light emitting device 1A. [Figure 11] 10 is a schematic diagram showing a relationship between a first light source 2A and a second light source 2B and an illumination region 30 according to a second embodiment. FIG. [Figure 12] FIG. 11 is a schematic overall view showing an example of a light emitting device 1C according to a third embodiment. [Figure 13] 2 is a schematic diagram showing the optical paths of light emitted from a first light source 2A and a second light source 2B. FIG. [Figure 14] FIG. 13 is a schematic overall view showing an example of a light emitting device 1D according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the light emitting devices 1A to 1D, the light source selection method, and the manufacturing method of the light emitting devices 1A to 1D according to the present embodiment are intended to embody the technical idea of ​​the present invention, and unless otherwise specified, the present invention is not limited to the following. The size and positional relationship of the members shown in each drawing may be appropriately exaggerated, and some of the members may be simplified or omitted.

[0012] In this embodiment, for convenience of explanation, an XYZ orthogonal coordinate system is adopted for explanation. Specifically, the thickness direction of the light emitting elements (details will be described later) included in the light emitting devices 1A to 1D is the "Z axis", and the two directions perpendicular to the thickness direction are the "X axis" and the "Y axis". On the Z axis, the direction along which the light from the light emitting devices 1A to 1D mainly travels is the "upper" direction, and the opposite direction is the "lower" direction. However, the expressions "upper" and "lower" are also for convenience and are unrelated to the direction of gravity. In addition, the expression "planar view" in this specification refers to a case where the viewer is looking from above the Z axis to below.

[0013] (First embodiment) Fig. 1 is a schematic overall view showing an example of a light emitting device 1A according to the first embodiment. Fig. 2 is a schematic view showing a relationship between a first light source 2A and a second light source 2B according to the first embodiment and an illumination region 30.

[0014] The light emitting device 1A includes a first light source 2A, a second light source 2B, and an optical member 3. The light emitting device 1A may further include a control device 4. The first light source 2A, the second light source 2B, and the optical member 3 are fixed to a support member (not shown) such as a bracket so as to maintain a predetermined positional relationship. The light emitting device 1A is used for any purpose. Examples of the uses of the light emitting device 1A include, but are not limited to, vehicle headlights, projectors, displays, and the like.

[0015] The first light source 2A and the second light source 2B are basically configured to have common components.

[0016] The first light source 2A includes a first substrate 20A, a plurality of first light-emitting elements 23A arranged at each first element position on the first substrate 20A with a predetermined element interval L, and a first drive circuit 24A that drives and lights the first light-emitting elements 23A individually. The plurality of first light-emitting elements 23A include a first illuminable element 23A-1 that can be lit by the first drive circuit 24A, and a first non-illuminable element 23A-2 that cannot be lit by the first drive circuit 24A.

[0017] The second light source 2B includes a second substrate 20B, a plurality of second light-emitting elements 23B arranged at each second element position on the second substrate 20B at a predetermined element interval L, and a second drive circuit 24B that drives and lights the second light-emitting elements 23B individually. The plurality of second light-emitting elements 23B include a second light-enabled element 23B-1 that can be turned on by the second drive circuit 24B, and a second non-light-enabled element 23B-2 that cannot be turned on by the second drive circuit 24B.

[0018] The element interval L of the first light emitting element 23A and the second light emitting element 23B indicates the pitch between adjacent light emitting elements. In this case, the element interval L is determined according to the arrangement of the first light emitting element 23A and the second light emitting element 23B. For example, when the arrangement is in a matrix or a staggered form, the element interval L is determined by the distance in the X direction and the Y direction between the centers of the adjacent light emitting elements, respectively. The element interval L may be the same or different in the X direction and the Y direction. When the arrangement is in a ring form, the element interval L is determined by the distance in the circumferential direction and the radial direction between the centers of the adjacent light emitting elements 23, respectively. The element interval L may be the same or different in the circumferential direction and the radial direction. In addition, the total number of elements of the first light emitting element 23A and the second light emitting element 23B is also determined according to the arrangement of the first light emitting element 23A and the second light emitting element 23B. When the arrangement is in a matrix or a staggered form, the total number of elements is determined by the number of elements in the X direction and the Y direction. When the arrangement is annular, the total number of elements is determined by the number of elements in the circumferential and radial directions.

[0019] The element size S of the first light emitting element 23A and the second light emitting element 23B indicates the dimension in a plan view. When the outer shape of the first light emitting element 23A and the second light emitting element 23B is rectangular in a plan view, it 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.

[0020] In the example of Fig. 2, the first element positions and the second element positions are provided in equal numbers and have a common arrangement. Specifically, the arrangement of the first element positions and the second element positions is a matrix arrangement form (total number of elements is 60) consisting of 12 elements arranged in the X direction and 5 elements arranged in the Y direction as shown in Fig. 2. The common arrangement means that when comparing each first element position where the first light emitting element 23A is arranged with each second element position where the second light emitting element 23B is arranged, the element interval L is the same and the arrangement form is the same.

[0021] The optical member 3 is a member that controls the light emitted from the first light source 2A and the second light source 2B so that the light emitted from the first light source 2A and the second light source 2B is irradiated onto a predetermined irradiation area 30.

[0022] In this embodiment, the optical member 3 is composed of a prism member 31 having a reflective / transmissive film 310 therein. The prism member 31 is made of glass, a light-transmitting resin, or the like. The prism member 31 may have any shape, for example, a polygonal prism such as a quadrangular prism. When the prism member 31 is a quadrangular prism, the reflective / transmissive film 310 is formed on the opposing surfaces of a pair of triangular prisms facing each other. The reflective / transmissive film 310 is, for example, a dielectric film or a metal film, and functions as a half mirror. The optical characteristics of the reflective / transmissive film 310 are set to, for example, a reflectance of 50% and a transmittance of 50%, but are not limited thereto.

[0023] The prism member 31 receives light from one of the first light source 2A and the second light source 2B (the first light source 2A in FIG. 1) from the first surface 310a side of the reflective transmission film 310 and transmits the light through the reflective transmission film 310. The light passes through optical paths PA1 and PA2. The prism member 31 receives light from the other of the first light source 2A and the second light source 2B (the second light source 2B in FIG. 1) from the second surface 310b side of the reflective transmission film 310 and reflects the light at the reflective transmission film 310. The light passes through optical paths PB1 and PB2. In this way, the prism member 31 controls the light from the first light source 2A and the second light source 2B.

[0024] In this embodiment, the first light source 2A is disposed on the first surface 310a side of the reflective / transmissive film 310 so that the incident angle with respect to the reflective / transmissive film 310 is 45°. The second light source 2B is disposed on the second surface 310b side of the reflective / transmissive film 310 so that the incident angle with respect to the reflective / transmissive film 310 is 45°.

[0025] The illumination area 30 includes a first lit position IA-1 where light from the first light source 2A is emitted by the first lit element 23A-1, a first unlit position IA-2 where light from the first light source 2A is not emitted by the first unlit element 23A-2, a second lit position IB-1 where light from the second light source 2B is emitted by the second lit element 23B-1, and a second unlit position IB-2 where light from the second light source 2B is not emitted by the second unlit element 23B-2.

[0026] Regarding the overlapping relationship of each position in the irradiation region 30, the first unlightable position IA-2 overlaps with the second lightable position IB-1, and the second unlightable position IB-2 overlaps with the first lightable position IA-1. Therefore, the first unlightable position IA-2 and the second unlightable position IB-2 are arranged so as not to overlap. Note that the first lightable position IA-1 and the second lightable position IB-1 may overlap, but may not.

[0027] When the first light emitting elements 23A of the first light source 2A are turned on, the first light source 2A emits light to the first light-enabled position IA-1 of the irradiation area 30 by the first light-enabled element 23A-1. The first light-disabled element 23A-2 does not emit light from the first light source 2A to the first non-lightable position IA-2 of the irradiation area 30. At this time, since the above overlapping relationship is satisfied, the second light source 2B includes the second light-enabled element 23B-1 arranged at the second element position capable of emitting light to the first non-lightable position IA-2 of the irradiation area 30. That is, when the second light emitting element 23B-1 arranged as described above is turned on, the second light source 2B emits light to the first non-lightable position IA-2 of the irradiation area 30 by the second light emitting element 23B-1. In the example of FIG. 2, the irradiation area 30 has a matrix arrangement form similar to the first element position and the second element position.

[0028] Therefore, the first non-light-inhibiting element 23A-2 and the second non-light-inhibiting element 23B-2 are defective elements, and if the lighting rates of the first light source 2A and the second light source 2B do not meet the predetermined judgment value, the light-emitting device is defective as a single unit. On the other hand, in the light-emitting device 1A in which these are combined, the first non-light-inhibiting element 23A-2 of the first light source 2A is complemented by the second light-enabled element 23B-1 of the second light source 2B. As a result, the light-emitting device 1A can improve the lighting rate by combining the first light source 2A and the second light source 2B having defective elements, compared to when the first light source 2A and the second light source 2B are used alone. In the example of FIG. 2, the lighting rate of the light-emitting device 1A meets the lighting rate of 100% for the irradiation area 30, but it is sufficient that the first non-light-inhibiting element 23A-2 of the first light source 2A is complemented by the second light-enabled element 23B-1 of the second light source 2B so as to exceed the predetermined judgment value, for example.

[0029] The control device 4 is a device that controls the lighting state of the first light source 2A and the second light source 2B. When the control device 4 receives a command to turn on or off the lights from a higher-level device (not shown), it transmits a lighting command or an extinguishing command to each of the first driving circuit 24A and the second driving circuit 24B.

[0030] The turn-on command for the first drive circuit 24A is configured to be able to specify the first lit element 23A-1 to be turned on and the brightness when the first lit element 23A-1 is turned on for each of the first lit elements 23A-1. The turn-off command for the first drive circuit 24A is configured to be able to specify the first lit element 23A-1 to be turned off for each of the first lit elements 23A-1.

[0031] The turn-on command for the second drive circuit 24B is configured to be able to specify the second lit element 23B-1 to be turned on and the brightness when the second lit element 23B-1 is turned on for each second lit element 23B-1. The turn-off command for the second drive circuit 24B is configured to be able to specify the second lit element 23B-1 to be turned off for each second lit element 23B-1.

[0032] (Configuration of the first light source 2A and the second light source 2B) In the following, the common configuration regarding the first light source 2A and the second light source 2B will be described as the light source 2.

[0033] Fig. 3 and Fig. 4 are a perspective view and a plan view showing an example of the light source 2. Fig. 5 is an enlarged plan view of a portion V shown in Fig. 4. Fig. 6 is a cross-sectional view taken along the line VI-VI shown in Fig. 4. Fig. 7 is an enlarged cross-sectional view of a portion VII shown in Fig. 6.

[0034] 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 with a predetermined element spacing L, a drive circuit 24 built into the submount substrate 22 and driving and lighting the plurality of light-emitting elements 23 individually, 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.

[0035] The submount substrate 22 corresponds to the first substrate 20A and the second substrate 20B shown in Fig. 1. The light-emitting element 23 corresponds to the first light-emitting element 23A and the second light-emitting element 23B shown in Fig. 1. The drive circuit 24 corresponds to the first drive circuit 24A and the second drive circuit 24B shown in Fig. 1. For convenience of explanation, the light diffusion member 27 and the covering member 28 are partially omitted in Fig. 3 and Fig. 4, and the submount substrate 22, the light-emitting element 23, the wire 25, and the like are partially visualized.

[0036] 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 arranged on an upper surface 210a of the base 210 and connected to the wires 25, and a first wiring 212 arranged on the upper surface 210a and inside the base 210. The package substrate 21 may include a plurality of pads (not shown) arranged on a lower surface 210b of the base 210 and connected to the first terminals 211 and the first wiring 212. The material of the base 210 may be, 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, when a conductive material is used, partial insulation treatment is required as necessary. The material of the first terminals 211, the first wiring 212, and the pads may be, 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.

[0037] In this embodiment, the base 210 has a rectangular shape in a plan view. The base 210 has a rectangular substrate placement area 213 in the center of an upper surface 210a thereof, 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.

[0038] 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.

[0039] The submount substrate 22 is joined to the substrate placement region 213 of the base 210 via a substrate joining member (not shown). The substrate joining member may be made of, for example, Ag sintered body, Cu sintered body, solder, or adhesive resin. The substrate placement region 213 may be made of a metal material having heat dissipation properties. This can improve the joining strength with the substrate joining member.

[0040] In this embodiment, the base 220 is rectangular in plan view. The base 220 has a rectangular element arrangement region 223 in which a plurality of light emitting elements 23 are arranged in the center of the upper surface 220a. When adjacent light emitting elements 23 are arranged at a distance from each other, the element arrangement region 223 can be defined by a line (dashed line in FIG. 5) drawn at a certain interval (e.g., half the length of the gap between adjacent light emitting elements 23) on the outer side surface of the light emitting element 23 located at the outermost periphery, as shown in FIG. 5. When adjacent light emitting elements 23 are arranged in contact with each other, the element arrangement region 223 can be defined by a line connecting the outer side surfaces (surfaces not facing adjacent light emitting elements 23) of the light emitting element 23 located at the outermost periphery in plan view. A plurality of pads (not shown) are arranged in the element arrangement region 223, and a plurality of light emitting elements 23 are respectively placed on the plurality of pads, and are joined by an element joining member 222 such as copper (Cu). Outside the element arrangement region 223 in the Y direction, a plurality of second terminals 221 are arranged at predetermined intervals in the X direction.

[0041] The plurality of light emitting elements 23 are elements that emit light of an arbitrary wavelength from the upper surface 230, and are composed of 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 shape with each side being about 40 to 50 μm, and the thickness of the light emitting elements 23 is about 5 to 10 μm. The material of the light emitting elements 23 that emit blue or green light can be a nitride semiconductor such as GaN, InGaN, or AlGaN, ZnSe, or GaP. The material of the light emitting elements 23 that emit red light can be GaAlAs, AlInGaP, or the like.

[0042] The multiple light-emitting elements 23 are arranged at a predetermined element interval L in the element arrangement region 223 of the submount substrate 22, and are electrically connected to pads of the submount substrate 22. In the example of Fig. 3 to Fig. 7, 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 is 16,384). The element size S of the upper surface 230 of the light-emitting element 23 is a square with each side of 45 µm, and the element interval L in the X direction and Y direction is 50 µm.

[0043] The driving circuit 24 is built in the submount substrate 22 and is configured by, for example, an integrated circuit. The driving circuit 24 is connected to each of the light emitting elements 23 via a second wiring. Instead of being built in the submount substrate 22, the driving circuit 24 may be built in the package substrate 21 or may be mounted on the upper surface 210a of the package substrate 21.

[0044] When the drive circuit 24 receives a turn-on command or a turn-off command from the control device 4, it controls the turning on or off of the light source 2 in response to the turn-on command or the turn-off command. In the case of a turn-on command, the drive circuit 24 controls the drive amount (drive current or drive voltage) to the light-emitting element 23 designated as the target to be turned on by the turn-on command to turn on the light. At that time, the drive circuit 24 controls the drive amount so that the brightness is as designated by the turn-on command. In the case of an turn-off command, the drive circuit 24 controls the drive amount to the light-emitting element 23 designated as the target to be turned off by the turn-off command to turn off the light.

[0045] The multiple wires 25 are members for electrically connecting the first terminal 211 of the package substrate 21 and the second terminal 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).

[0046] The light reflective 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 reflective members 26 have light reflectivity and are made of a material that contains a particulate light reflective material in a base material made of a light-transmitting resin, for example. The base material of the light reflective members 26 can be, for example, a resin such as silicone resin, epoxy resin, or acrylic resin. The light reflective material of the light reflective members 26 can be, for example, titanium oxide, aluminum oxide, or the like.

[0047] The light diffusion 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 diffusion member 27 has translucency and light diffusion properties, and is composed of a material containing a particulate light diffusion material in a base material made of a translucent resin, for example. The light diffusion member 27 may further contain, for example, a particulate wavelength conversion material in its base material, or the light diffusion material itself may function as a wavelength conversion material. The base material of the light diffusion member 27 may be, for example, the same material as the base material of the light reflecting member 26 described above. The light diffusion material of the light diffusion member 27 may be, for example, the same material as the light reflecting material of the light reflecting member 26 described above. The wavelength conversion material of the light diffusion member 27 may be any phosphor depending on the wavelength of the light emitted by the light emitting element 23. When the light emitting element 23 emits, for example, blue light, a wavelength conversion material that absorbs a part of the blue light from the light emitting element 23 and emits yellow light may be used. As a result, white light is obtained by mixing the yellow light emitted from the light diffusing member 27 and the blue light that has passed through the light diffusing member 27. An example of a wavelength conversion material that absorbs a portion of the blue light from the light emitting element 23 and emits yellow light is a YAG phosphor.

[0048] The light diffusing member 27 has an upper surface 270 and a lower surface 271 located on the opposite side to the upper surface 270. When at least one of the multiple 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. Then, 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.

[0049] 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 the outer resin frame 280 and the inner resin frame 281 to cover and protect wires 25.

[0050] The covering member 28 is made of a material that has light blocking properties and contains a particulate light absorbing material 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-reflective 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-reflective member 26. The covering member 28 may contain both a light absorbing agent and a light reflecting material.

[0051] 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 necessary.

[0052] When the light source 2 having the above configuration is manufactured, if the lighting rate of the light source 2 (= the number of light-emitting elements 23 determined to be light-enabled elements / total number of light-emitting elements 23) does not exceed a predetermined judgment value, the light source 2 is judged to be a defective product. Therefore, the light emitting device 1A is configured by combining the first light source 2A and the second light source 2B that are judged to be defective products so that the first unlightable element 23A-2 of the first light source 2A is complemented by the second light-enabled element 23B-1 of the second light source 2B.

[0053] 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 and the second drive circuit 24B. The lighting command for the first drive circuit 24A is, for example, to light all of the first light-enabled elements 23A-1 at a predetermined brightness. The lighting command for the second drive circuit 24B is, for example, to light the second light-enabled elements 23B-1 arranged at the second element position capable of emitting light to the first non-lightable position IA-2 at a predetermined brightness.

[0054] Then, the first drive circuit 24A and the second drive circuit 24B light the first light-enabled element 23A-1 and the second light-enabled element 23B-1 to be turned on in response to the respective lighting commands. As a result, as shown in Fig. 2, the first light-enabled element 23A-1 emits light from the first light source 2A to the first light-enabled position IA-1 in the irradiation area 30. Also, the second light source 2B emits light from the second light source 2B to the first non-lightable position IA-2 in the irradiation area 30.

[0055] As described above, according to the light emitting device 1A of this embodiment, by combining the first light source 2A and the second light source 2B each having the first unlightable element 23A-2 and the second unlightable element 23B-2 as defective elements, the first unlightable element 23A-2 of the first light source 2A is complemented by the second lightable element 23B-1 of the second light source 2B. This allows the light emitting device 1A to improve the lighting rate compared to when the first light source 2A and the second light source 2B are used alone. Therefore, the light source 2 determined to be defective can be effectively used.

[0056] (How to select a light source) Next, a light source selection method for selecting a combination of the first light source 2A and the second light source 2B used in the light emitting device 1A having the above configuration will be described. The light source selection method is executed by the light source selection device 5 or an operator. In this embodiment, the case where the method is executed by the light source selection device 5 will be mainly described.

[0057] 8 is a block diagram showing an example of the light source selecting device 5. The light source selecting device 5 is configured, for example, by a general-purpose or dedicated computer.

[0058] The light source selection device 5 includes a storage unit 50 configured with a memory such as an HDD or SSD, a control unit 51 configured with a processor, an input unit 52 configured with a keyboard, a mouse, etc., an output unit 53 configured with a display, a speaker, etc., a communication unit 54 connected to an external device so as to be able to communicate with the external device by an arbitrary communication method, an external device connection unit 55 connected to a recording medium such as a USB memory or a peripheral device such as a printer, and a luminance measurement unit 56 configured with a CCD image sensor, a CMOS image sensor, etc. in which a plurality of light receiving elements (pixels) are two-dimensionally arranged. The control unit 51 executes a light source selection program 500 stored in the storage unit 50, thereby functioning as a data acquisition unit 510, a first light source selection unit 511, and a second light source selection unit 512.

[0059] FIG. 9 is a flowchart showing an example of a light source selection method.

[0060] (Data acquisition process S10) First, in a data acquisition step S10, light source data is acquired for each of the multiple light sources 2. The light source data is data indicating element positions where light-enabled elements that can be turned on by the drive circuit 24 are arranged, and element positions where non-light-enabled elements that cannot be turned on by the drive circuit 24 are arranged.

[0061] The multiple light sources 2 are manufactured, for example, on a manufacturing line for the light sources 2. A performance inspection of the light sources 2 is performed, for example, by the light source selection device 5 in-line or offline on the manufacturing line, to acquire inspection data of each light source 2. At that time, light source identification information for identifying the light source 2 is assigned to each light source 2, and the light source data of each light source 2 is stored in the storage unit 50 in association with the light source identification information.

[0062] The light source 2 to be measured is disposed within a measurement region (angle of view) of the luminance measurement unit 56, and the light that is transmitted through the light diffusion member 27 by turning on the multiple light-emitting elements 23 is received by each light-receiving element. The luminance measurement unit 56 converts the received light into a digital signal corresponding to the brightness, and outputs the luminance value for each pixel as luminance measurement data.

[0063] The data acquisition unit 510 identifies the correspondence between each pixel in the luminance measurement data output by the luminance measurement unit 56 and each element position of the light-emitting element 23, and identifies the brightness for each element position from the luminance value of the pixel corresponding to each element position. If the brightness of an element position exceeds a predetermined reference value, the data acquisition unit 510 determines that the light-emitting element 23 arranged at that element position is an element that can be lit, and if the brightness of the element position does not exceed the predetermined reference value, the data acquisition unit 510 determines that the light-emitting element 23 arranged at that element position is an element that cannot be lit. The data acquisition unit 510 acquires light source data for the light source 2 to be measured based on the determination result for each element position.

[0064] At this time, if the lighting rate of the light source 2 to be measured (= the number of light-emitting elements 23 determined to be lightable elements / total number of light-emitting elements 23) exceeds a predetermined judgment value, it is judged to be a normal product, and if not, it is judged to be a defective product. Therefore, the light source 2 judged to be a normal product is excluded from the light sources 2 to be selected in the first light source selection step S11 and the second light source selection step S12 described later.

[0065] (First light source selection step S11) Next, in a first light source selection step S11, a first light source 2A is selected from the multiple light sources 2. The first light source selection unit 511, for example, refers to light source data of each light source 2 and selects the first light source 2A based on the number and arrangement of non-lightable elements included in the light source 2. For example, the light source 2 with a low lighting rate may be preferentially selected, or the light source 2 with a high lighting rate may be preferentially selected.

[0066] (Second light source selection step S12) Next, in a second light source selection process S12, a second light source 2B to be combined with the first light source 2A selected in the first light source selection process S11 is selected from the multiple light sources 2 based on the light source data for each light source 2 acquired in the data acquisition process S10. The combination selection result is stored in the storage unit 50 by the light source identification information assigned to the first light source 2A and the second light source 2B, respectively.

[0067] The second light source selection unit 512, for example, refers to the light source data of each light source 2 and selects, as the second light source 2B, a light source 2 having a second light-enabled element 23B-1 arranged in an element position capable of emitting light toward a first non-light-enabled position IA-2 where light from the first light source 2A is not emitted by the first non-light-enabled element 23A-2 provided in the first light source 2A in the irradiation area 30.

[0068] In this case, when the first light source 2A has a plurality of first unlightable positions IA-2, a light source 2 having a second light-enabled element 23B-1 arranged at an element position capable of emitting light to all of the first unlightable positions IA-2 may be selected as the second light source 2B. In this case, the lighting rate of the light-emitting device 1A in which the first light source 2A and the second light source 2B are combined is 100%. In addition, a light source 2 having a second light-enabled element 23B-1 arranged at an element position capable of emitting light to some of the first unlightable positions IA-2 may be selected as the second light source 2B so that the lighting rate exceeds a predetermined judgment rate, not for all of the first unlightable positions IA-2. In this case, the lighting rate of the light-emitting device 1A in which the first light source 2A and the second light source 2B are combined exceeds a predetermined judgment value.

[0069] Note that the first light source selection step S11 and the second light source selection step S12 may be repeated to select a plurality of combinations.

[0070] As described above, according to the light source selection method of the present embodiment, it is possible to select a combination of the first light source 2A and the second light source 2B that can complement each other's non-lightable positions, and therefore it is possible to effectively utilize the light source 2 that has been determined to be defective.

[0071] (Method of manufacturing a light emitting device) Next, a method for manufacturing the light emitting device 1A using the first light source 2A and the second light source 2B selected as a combination by the above-mentioned light source selection method will be described. The method for manufacturing the light emitting device 1A is performed by a manufacturing device (not shown) and an operator installed in a manufacturing line.

[0072] FIG. 10 is a flowchart showing an example of a method for manufacturing the light emitting device 1A.

[0073] (Preparation process S20) In a preparation step S20, the first light source 2A and the second light source 2B selected as a combination by the above-mentioned light source selection method are prepared, along with the optical member 3. For example, the light source identification information stored in the storage unit 50 of the light source selection device 5 is referenced to identify the first light source 2A and the second light source 2B for manufacturing the light emitting device 1A.

[0074] (Assembly process S21) In an assembly step S21, the positional relationship between the first light source 2A and the second light source 2B prepared in the preparation step S20 and the optical member 3 is adjusted to assemble the light emitting device 1A. At this time, the positional relationship is adjusted so that the first unlightable position IA-2 by the prepared first light source 2A overlaps with the second lightable position IB-1 by the prepared second light source 2B in the irradiation area 30 of the optical member 3, as shown in Fig. 2. The positional relationship may be adjusted, for example, by the positions and angles at which the first light source 2A and the second light source 2B are fixed to the support member, or by adjusting the position and angle at which the optical member 3 is fixed to the support member.

[0075] When a plurality of combinations are selected, the above-described preparation step S20 and assembly step S21 may be repeated to manufacture a plurality of light emitting devices 1A.

[0076] As described above, according to the manufacturing method of the light emitting device 1A of this embodiment, by manufacturing the light emitting device 1A by combining the first light source 2A and the second light source 2B having the defective element, it is possible to manufacture the light emitting device 1A with an improved lighting rate compared to the case where the first light source 2A and the second light source 2B are used individually. Therefore, it is possible to effectively utilize the light source 2 that has been determined to be defective.

[0077] Second embodiment FIG. 11 is a schematic diagram showing the relationship between a first light source 2A and a second light source 2B and an illumination region 30 according to the second embodiment.

[0078] The second embodiment differs from the first embodiment in that the illumination area 30 of the optical member 3 has a predetermined high light intensity area 30a as a part of the illumination area 30. The other basic configurations and operations are the same as those of the light emitting device 1A according to the first embodiment, so the following description will focus on the differences between the two.

[0079] The optical member 3 controls the light emitted from the first light source 2A and the second light source 2B so as to have a predetermined high light intensity region 30a as a part of the irradiation region 30. The first light source 2A includes a first lit element 23A-1 arranged at a first element position capable of emitting light to the high light intensity region 30a. The second light source 2B includes a second lit element 23B-1 arranged at a second element position capable of emitting light to the high light intensity region 30a.

[0080] The high light amount region 30a is a region where light from both the first light source 2A and the second light source 2B is emitted by arranging the first light source IA-1 and the second light source IB-1 so as to overlap. Therefore, the high light amount region 30a can emit a higher amount of light than other regions where light from one of the first light source 2A and the second light source 2B is emitted. When the light emitting device 1B is used in, for example, a vehicle headlight, the high light amount region 30a can be used as a region for high beam.

[0081] In the example of Fig. 11, the first light-enabled element 23A-1 and the second light-enabled element 23B-1 are arranged in a rectangular configuration (reference numerals 233A, 233B) with four elements arranged in the X direction and two elements arranged in the Y direction. Similarly, the high light quantity region 30a also has a rectangular configuration. Note that the high light quantity region 30a is not limited to a rectangular shape, and the shape and size may be changed as appropriate. The high light quantity region 30a may be divided into multiple regions.

[0082] In a light source selection method for selecting a combination of a first light source 2A and a second light source 2B to be used in a light emitting device 1B having the above-mentioned configuration, the first light source 2A and the second light source 2B may be selected, respectively, based on the high light intensity region 30a in a first light source selection step S11 and a second light source selection step S12.

[0083] Specifically, the first light source selection unit 511 selects, as the first light source 2A, a light source 2 including a first light-enabled element 23A-1 arranged at an element position capable of emitting light to the high light intensity region 30a. The second light source selection unit 512 selects, as the second light source 2B, a light source 2 including a second light-enabled element 23B-1 arranged at an element position capable of emitting light to the high light intensity region 30a, and a second light-enabled element 23B-1 arranged at an element position capable of emitting light to a first non-lightable position IA-2 where light from the first light source 2A is not emitted by a first non-lightable element 23A-2 included in the first light source 2A in the irradiation region 30.

[0084] As described above, according to the light emitting device 1B of this embodiment, the light emitted from the first light source 2A and the second light source 2B is irradiated onto the high light intensity region 30a. Therefore, the light emitting device 1B in which the first light source 2A and the second light source 2B are combined can be used for applications requiring a high intensity of light.

[0085] (Third embodiment) Fig. 12 is a schematic overall view showing an example of a light emitting device 1C according to the third embodiment. Fig. 13 is a schematic view showing the optical paths of light emitted from a first light source 2A and a second light source 2B.

[0086] The third embodiment differs from the first embodiment in that the optical member 3 is configured as a plate-like member 32 having a reflective / transmissive film 320 on a surface 32a. Other basic configurations and operations are similar to those of the light emitting device 1A according to the first embodiment, so the following description will focus on the differences between the two.

[0087] The plate-like member 32 is made of glass, a light-transmitting resin, or the like, and has a reflective / transmissive film 320 on its surface 32a. The reflective / transmissive film 320 is, for example, a dielectric film or a metal film, and functions as a half mirror. The optical characteristics of the reflective / transmissive film 320 are set to, for example, a reflectance of 50% and a transmittance of 50%, but are not limited to this.

[0088] In the plate-shaped member 32, light from one of the first light source 2A and the second light source 2B (the first light source 2A in the example of FIG. 12) is incident on the back surface 32b side of the plate-shaped member 32 and passes through the reflective / transmissive film 320. The light at this time passes through optical paths PA3 and PA4. In addition, light from the other of the first light source 2A and the second light source 2B (the second light source 2B in the example of FIG. 12) is incident on the front surface 32a side of the plate-shaped member 32 and reflected by the reflective / transmissive film 320. The light at this time passes through optical paths PB3 and PB4. In this way, the plate-shaped member 32 controls the light from the first light source 2A and the second light source 2B.

[0089] In this embodiment, the first light source 2A is disposed on the back surface 32b side of the plate-shaped member 32 so that the incident angle with respect to the reflective / transmissive film 320 is 45°. The second light source 2B is disposed on the front surface 32a side of the plate-shaped member 32 so that the incident angle with respect to the reflective / transmissive film 320 is 45°.

[0090] The thickness T of the plate-like member 32 is set in accordance with the element interval L and the element size S of the first light-emitting element 23A or the second light-emitting element 23B.

[0091] 13, light incident on the plate-shaped member 32 from the first light source 2A travels along optical path PA4, and light incident on the plate-shaped member 32 from the second light source 2B travels along optical path PB4. At this time, a part of the light travels along optical paths PA5, PB5 that are shifted from the optical paths PA4, PB4 due to internal reflection in the plate-shaped member 32. The amount of shift D between the optical paths PA4, PB4 and the optical paths PA5, PB5 is calculated by the following formula (1) using the thickness T of the plate-shaped member 32 and the refractive index n of the plate-shaped member 32.

number

[0092] In the first light source 2A and the second light source 2B, in order to clarify the boundary between adjacent light emitting elements, it is preferable that the light emitted from the first light-enabled element 23A-1 and traveling along the optical path PA5 does not overlap with the light emitted from the adjacent first light-enabled element 23A-1 and traveling along the optical path PA4. It is also preferable that the light emitted from the second light-enabled element 23B-1 and traveling along the optical path PB5 does not overlap with the light emitted from the adjacent second light-enabled element 23B-1 and traveling along the optical path PA4. Therefore, it is preferable that the deviation amount D satisfies the following formula (2).

number

[0093] Therefore, it is preferable that the thickness T of the plate-like member 32 is set so as to satisfy the following formula (3) by substituting formula (1) into the above formula (2) and modifying it.

number

[0094] As described above, according to the light emitting device 1C of this embodiment, the light emitting device 1C can be realized with a simple configuration because the plate-like member 32 can be used as the optical member 3. In this case, the thickness T of the plate-like member 32 is set according to the element spacing L and the element size S, so that the boundary between adjacent light emitting elements can be made clear.

[0095] (Fourth embodiment) FIG. 14 is a schematic overall view showing an example of a light emitting device 1D according to the fourth embodiment.

[0096] The fourth embodiment differs from the third embodiment in that a light emitting device 1D further includes a mirror member 6 and a light collecting member 7. Other basic configurations and operations are similar to those of the light emitting device 1C according to the third embodiment, so the following description will focus on the differences between the two.

[0097] The mirror member 6 is a member that functions as a total reflection mirror in which a dielectric film or a metal film is formed on the surface of a base material. The mirror member 6 reflects light from one of the light sources 2 of the first light source 2A and the second light source 2B (the first light source 2A in the example of FIG. 14), which is incident on the plate-shaped member 32 from the back surface 32b side of the plate-shaped member 32 and reflected by the reflective transmission film 320, and guides the light to the irradiation area 30 side. The light at this time passes through optical paths PA6 and PA7. The mirror member 6 also reflects light from the other of the light sources 2 of the first light source 2A and the second light source 2B (the second light source 2B in the example of FIG. 14), which is incident on the plate-shaped member 32 from the front surface 32a side of the plate-shaped member 32 and transmitted through the reflective transmission film 320, and guides the light to the irradiation area 30 side. The light at this time passes through optical paths PB6 and PB7.

[0098] In this embodiment, the mirror member 6 is disposed on the opposite side to the second light source 2B across the optical member 3. Specifically, the mirror member 6 is disposed on an extension of an optical path PA6 of the light emitted from the first light source 2A and reflected by the reflective / transmissive film 320, and on an extension of an optical path PB6 of the light emitted from the second light source 2B and transmitted through the reflective / transmissive film 320.

[0099] The light collecting member 7 is a member formed of glass, a light-transmitting resin, or the like, and has a convex surface. The light collecting member 7 collects the light from the first light source 2A and the second light source 2B incident thereon via the optical member 3 and the mirror member 6 onto the irradiation area 30.

[0100] In this embodiment, the light collecting member 7 is disposed on the opposite side to the first light source 2A across the optical member 3. Specifically, the light collecting member 7 is disposed on an extension of an optical path PA4 of the light emitted from the first light source 2A and transmitted through the reflective transmission film 320, and on an extension of an optical path PB4 of the light emitted from the second light source 2B and reflected by the reflective transmission film 320. The light collecting member 7 may be omitted.

[0101] As described above, according to the light emitting device 1D of this embodiment, of the light emitted from the first light source 2A and the second light source 2B, the light that deviates from the optical paths PA4, PB4 proceeding to the irradiation area 30 by the optical member 3 can be guided to the irradiation area 30 by the mirror member 6. This can improve the utilization rate of the light emitted from the first light source 2A and the second light source 2B.

[0102] (Other embodiments) Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be modified as appropriate without departing from the technical concept of the present invention.

[0103] In the above embodiment, the features of the light emitting devices 1A to 1D in each embodiment have been described. However, the features of each embodiment may be appropriately combined. For example, the light emitting devices 1A and 1B according to the first and second embodiments may include at least one of the mirror member 6 and the light collecting member 7 according to the fourth embodiment. The light emitting device 1C according to the third embodiment may include the light collecting member 7 according to the fourth embodiment. The light emitting devices 1C and 1D according to the third and fourth embodiments may have the high light intensity region 30a according to the second embodiment.

[0104] In the above embodiment, the optical characteristics of the reflective / transmissive film 310 of the prism member 31 and the reflective / transmissive film 320 of the plate-like member 32 are set to a reflectance of 50% and a transmittance of 50%.

[0105] On the other hand, the optical characteristics of the reflective / transmissive films 310 and 320 may be set so that the transmittance is higher than the reflectance. For example, the reflectance is set in the range of 0.1 to 0.4, and the transmittance is set in the range of 0.6 to 0.9. In particular, when the number of the first light-enabled elements 23A-1 or the second light-enabled elements 23B-1 (the first light-enabled elements 23A-1 in the examples of Figs. 1, 12, and 14) included in one light source 2 on the transmission side is greater than the number of the first light-enabled elements 23A-1 or the second light-enabled elements 23B-1 (the second light-enabled elements 23B-1 in the examples of Figs. 1, 12, and 14) included in the other light source 2 on the reflection side, it is preferable to set the optical characteristics as described above. As a result, when the brightness is made uniform over the entire irradiation region 30, the light source 2 on the transmission side, which has a larger number of elements, can be turned on with a smaller driving amount, thereby reducing the power consumption of the entire light-emitting devices 1A to 1D.

[0106] The optical characteristics of the reflective and transmissive films 310 and 320 may be set such that the reflectance is higher than the transmittance. For example, the reflectance is set in the range of 0.6 to 0.9, and the transmittance is set in the range of 0.1 to 0.4. In particular, when the number of the first light-enabled elements 23A-1 or the second light-enabled elements 23B-1 (the second light-enabled elements 23B-1 in the examples of Figs. 1, 12, and 14) included in the other light source 2 on the reflective side is greater than the number of the first light-enabled elements 23A-1 or the second light-enabled elements 23B-1 (the first light-enabled elements 23A-1 in the examples of Figs. 1, 12, and 14) included in one light source 2 on the transmissive side, it is preferable to set the optical characteristics as described above. As a result, when the brightness is made uniform over the entire irradiation area 30, the reflective light source 2 having a larger number of elements can be turned on with a smaller driving amount, so that the power consumption of the entire light-emitting devices 1A to 1D can be reduced.

[0107] In the above embodiment, the first element positions of the first light source 2A and the second element positions of the second light source 2B are provided in equal numbers and have a common arrangement. However, the first element positions of the first light source 2A and the second element positions of the second light source 2B do not have to be in equal numbers, and do not have to have a common arrangement.

[0108] 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. Also, in the above embodiment, the outer shape of the element arrangement region 223 is 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.

[0109] In the above embodiment, the light source selection program 500 is stored in the storage unit 50, but this is not limiting. The light source selection program 500 may be provided by being recorded in a computer-readable recording medium such as a USB memory, a CD-ROM, or a DVD as a file in an installable or executable format, or may be provided by being stored on a computer connected to a network such as the Internet and downloaded via the network.

[0110] Through the contents described so far in this specification, the following technical matters are disclosed. (Section 1) a first light source including a first substrate, a plurality of first light-emitting elements arranged at each first element position on the first substrate at a predetermined element interval, and a first drive circuit that drives and lights the first light-emitting elements individually, the plurality of first light-emitting elements including first light-enabled elements that can be lit by the first drive circuit and first non-light-enabled elements that cannot be lit by the first drive circuit; a second light source including a second substrate, a plurality of second light-emitting elements arranged at each second element position on the second substrate at the element interval, and a second drive circuit that drives and lights the second light-emitting elements individually, the plurality of second light-emitting elements including second light-enabled elements that can be lit by the second drive circuit and second non-light-enabled elements that cannot be lit by the second drive circuit; an optical member that controls the light emitted from the first light source and the second light source so that the light emitted from the first light source and the second light source is irradiated onto a predetermined irradiation area; The second light source includes the second light-enabled element disposed at the second element position capable of emitting light to a non-light-enabled position in the illumination area where the light from the first light source is not emitted by the first non-light-enabled element. Light emitting device. (Section 2) The first element positions and the second element positions are provided in equal numbers and have a common arrangement. Item 1. A light-emitting device according to item 1. (Section 3) The optical member is controlling the light emitted from the first light source and the second light source so as to have a predetermined high light amount region as a part of the irradiation region; The first light source is the first light-enabled element is disposed at the first element position capable of emitting light to the high light amount region, The second light source is The second light-enabled element is disposed at the second element position capable of emitting light to the high light amount region. Item 1 or 2. The light-emitting device according to item 1 or 2. (Section 4) The optical member is It is composed of a prism member having a reflection / transmission film inside, The prism member is light from one of the first light source and the second light source is incident on a first surface side of the reflective / transmissive film and transmitted through the reflective / transmissive film, and light from the other of the first light source and the second light source is incident on a second surface side of the reflective / transmissive film and reflected by the reflective / transmissive film, thereby controlling the light from the first light source and the second light source. Item 4. The light emitting device according to any one of items 1 to 3. (Section 5) The optical member is It is composed of a plate-shaped member having a reflective / transmissive film on its surface, The plate-like member is light from one of the first light source and the second light source is incident on the back side of the plate-like member and transmitted through the reflective / transmissive film, and light from the other of the first light source and the second light source is incident on the front side of the plate-like member and reflected by the reflective / transmissive film, thereby controlling the light from the first light source and the second light source. Item 4. The light emitting device according to any one of items 1 to 3. (Section 6) The thickness of the plate-like member is The element interval is set according to the element size of the first light emitting element or the second light emitting element. Item 6. The light-emitting device according to item 5. (Section 7) Further comprising a mirror member, The mirror member is a light source for reflecting light reflected by the reflective / transmissive film and a light source for reflecting light transmitted through the reflective / transmissive film, the light source for reflecting light reflected by the reflective / transmissive film and the ... Item 7. The light emitting device according to any one of items 4 to 6. (Section 8) The reflective / transmissive film is The transmittance is higher than the reflectance, The number of the first light-enabled elements or the second light-enabled elements included in the one light source is The number of elements is greater than the number of the first light-enabled elements or the second light-enabled elements of the other light source. Item 8. The light emitting device according to any one of items 4 to 7. (Section 9) The reflective / transmissive film is Reflectance is higher than transmittance, The number of the first light-enabled elements or the second light-enabled elements included in the other light source is the number of elements is greater than the number of the first light-activatable elements or the second light-activatable elements included in the one light source, Item 8. The light emitting device according to any one of items 4 to 7. [Explanation of symbols]

[0111] Reference Signs List 1A to 1D...light emitting device, 2...light source, 2A...first light source, 2B...second light source, 3...optical member, 4...control device, 5...light source selection device, 6...mirror member, 7...light collecting member, 20A...first substrate, 20B...second substrate, 21...package substrate, 22...submount substrate, 23...light emitting element, 23A...first light emitting element, 23A-1...first light emitting element, 23A-2...first non-light emitting element, 23B...second light emitting element, 23B-1...second light emitting element, 23B-2...second non-light emitting element, 24...drive circuit, 24A...first drive circuit, 24B...second drive circuit, 30...irradiation area, 30a...high light amount area, 31...prism member, 32...plate-shaped member

Claims

1. a first light source including a first substrate, a plurality of first light-emitting elements arranged at each first element position on the first substrate at a predetermined element interval, and a first drive circuit for individually driving and lighting the first light-emitting elements, the plurality of first light-emitting elements including first light-enabled elements that can be lit by the first drive circuit and first non-light-enabled elements that cannot be lit by the first drive circuit; a second light source including a second substrate, a plurality of second light-emitting elements arranged at each second element position on the second substrate at the element intervals, and a second drive circuit that drives and lights the second light-emitting elements individually, the plurality of second light-emitting elements including second light-enabled elements that can be lit by the second drive circuit and second non-light-enabled elements that cannot be lit by the second drive circuit; an optical member that controls the light emitted from the first light source and the second light source so that the light emitted from the first light source and the second light source is irradiated onto a predetermined irradiation area; The second light source includes the second light-enabled element disposed at the second element position capable of emitting light to a non-light-enabled position in the illumination area where the light from the first light source is not emitted by the first non-light-enabled element. Light emitting device.

2. The first element positions and the second element positions are provided in equal numbers and have a common arrangement. The light emitting device according to claim 1 .

3. The optical member is controlling the light emitted from the first light source and the second light source so as to have a predetermined high light amount region as a part of the irradiation region; The first light source is the first light-enabled element is disposed at the first element position capable of emitting light to the high light amount region, The second light source is the second light-enabled element is disposed at the second element position capable of emitting light to the high light amount region, The light emitting device according to claim 1 .

4. The optical member is It is composed of a prism member having a reflection / transmission film inside, The prism member is light from one of the first light source and the second light source is incident on a first surface side of the reflective / transmissive film and transmitted through the reflective / transmissive film, and light from the other of the first light source and the second light source is incident on a second surface side of the reflective / transmissive film and reflected by the reflective / transmissive film, thereby controlling the light from the first light source and the second light source. The light emitting device according to claim 1 .

5. The optical member is It is composed of a plate-shaped member having a reflective / transmissive film on its surface, The plate-like member is light from one of the first light source and the second light source is incident on the back side of the plate-like member and transmitted through the reflective / transmissive film, and light from the other of the first light source and the second light source is incident on the front side of the plate-like member and reflected by the reflective / transmissive film, thereby controlling the light from the first light source and the second light source. The light emitting device according to claim 1 .

6. The thickness of the plate-like member is The element interval is set according to the element size of the first light emitting element or the second light emitting element. The light emitting device according to claim 5 .

7. Further comprising a mirror member, The mirror member is a light source for reflecting the light reflected by the reflection / transmission film and a light source for reflecting the light transmitted through the reflection / transmission film, the light source for reflecting the light reflected by the reflection / transmission film and the ... The light emitting device according to claim 4 or 5.

8. The reflective / transmissive film is The transmittance is higher than the reflectance, The number of the first light-enabled elements or the second light-enabled elements included in the one light source is the number of the first light-enabled elements or the second light-enabled elements included in the other light source is greater than the number of the first light-enabled elements or the second light-enabled elements included in the other light source, The light emitting device according to claim 4 or 5.

9. The reflective / transmissive film is Reflectance is higher than transmittance, The number of the first light-enabled elements or the second light-enabled elements included in the other light source is the number of light sources is greater than the number of the first light sources or the second light sources; The light emitting device according to claim 4 or 5.

10. A light source selection method for selecting a combination of a first light source and a second light source used in a light emitting device that irradiates a predetermined irradiation area by controlling light emitted from a first light source and a second light source using an optical member, the method comprising: a data acquisition step of acquiring data for each of a plurality of light sources, each of which includes a substrate, a plurality of light-emitting elements arranged at respective element positions on the substrate at a predetermined element interval, and a drive circuit for individually driving and lighting the light-emitting elements, the data indicating element positions at which light-enabled elements that can be turned on by the drive circuit are arranged and element positions at which non-light-enabled elements that cannot be turned on by the drive circuit are arranged; a first light source selection step of selecting a first light source from the plurality of light sources; a second light source selection step of selecting, from among the plurality of light sources, a second light source to be combined with the first light source selected in the first light source selection step, based on the data for each of the light sources acquired in the data acquisition step; The second light source selection step includes: A light source including the light-enabled element arranged at an element position capable of emitting light with respect to a non-light-enabled position where the light from the first light source is not emitted by the non-light-enabled element included in the first light source in the illumination region is selected as the second light source. Light source selection method.

11. a preparation step of preparing the first light source and the second light source selected as the combination by the light source selection method according to claim 10, and the optical member; an assembling step of adjusting a positional relationship between the first light source and the second light source prepared in the preparing step and the optical member, and assembling the light emitting device. A method for manufacturing a light emitting device.

Images