Light-emitting device

Abstract

The present invention provides a light-emitting device that can be efficiently driven with simple wiring without compromising the reliability or output characteristics of the device, even if it does not use conventional wiring connection methods. [Solution] A light-emitting device comprising a semiconductor laser element, wherein the semiconductor laser element has a top surface, a light-emitting surface having two light-emitting points consisting of a first light-emitting point and a second light-emitting point, a first waveguide corresponding to the first light-emitting point and a second waveguide corresponding to the second light-emitting point, and two to five wirings are joined to the top surface, and in a top view, the number of wirings whose joining positions on the top surface of the semiconductor laser element are in the region overlapping with the first waveguide and the number of wirings whose joining positions are in the region overlapping with the second waveguide are both zero, or if there is at least one of them, they are not the same number.

Description

Technical Field

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

Background Art

[0002] In Patent Document 1, a relay member is disposed between a laser element and a lead terminal, and a wire for electrically connecting the laser element to the lead terminal is connected to the relay member, and electrical connection is achieved via the relay member. A light-emitting device is disclosed. Further, Patent Document 1 discloses an embodiment in which a plurality of laser elements are arranged in a matrix, a plurality of laser elements arranged in a row are electrically connected in series, and the plurality of laser elements can be independently driven in units of rows.

Prior Art Documents

[0003]

Patent Documents

Patent Document 1

Summary of the Invention

[0004]

Problems to be Solved by the Invention

[0005] Provided is a light-emitting device in which a plurality of light-emitting elements arranged in a row are electrically connected so as to be divided into two or more groups capable of independent driving.

Means for Solving the Problems

[0006]

[0007] [Figure 1] / / There is no content here in the original, so it remains unchanged in translation [Figure 2] [Figure 3] [Figure 4] [Figure 5] [Figure 6] <000008% / / There is no content here in the original, so it remains unchanged in translation [Figure 8] [Figure 9] [Figure 10] [Figure 11] <"0000091"> [Figure 12] [Figure 13] [Figure 14A] [Figure 14B] [Figure 15A] [Figure 15B] [Figure 15C] [Figure 15D] [Figure 15E] [Figure 15F] [Figure 16A] [Figure 16B] [Figure 16C] [Figure 16D]

[0008] <00001%

[0009]

[0010]

[0011]

[0012]

[0013]

[0014] <00% <000017%

[0016]

[0017] <000019%

[0018] [[ID=2The first light-emitting element, one or more second light-emitting elements, and one or more third light-emitting elements, Including, arranged in 2 rows and N columns (N≧2) within the arrangement area, each emitting light above the mounting surface. Multiple light-emitting elements having firing points, and multiple elements arranged in 2 rows and N columns within the arrangement area One or more first relay members, including one or more first relay members, are arranged in the region between rows of the light-emitting elements. A relay member and two of the plurality of first and second wirings, the one or more A plurality of wirings for the first light-emitting element that electrically connect the first light-emitting element in series, and the plurality of first wirings Two of the wires, one or more of the second light-emitting elements, are electrically connected in series to the wire and the second wiring. Multiple wirings for the second light-emitting element to be connected, and two of the multiple first wirings and second wirings A wiring for electrically connecting one or more of the above-mentioned third light-emitting elements in series to a plurality of third light-emitting elements. The wiring comprises the two wirings that electrically connect the one or more first light-emitting elements in series. At least one of the wires has the second light-emitting element wire and the third light-emitting element wire. The two are not joined and electrically connect the one or more second light-emitting elements in series. At least one of the wirings is the wiring for the first light-emitting element and the wiring for the third light-emitting element. The two are not joined and the one or more third light-emitting elements are electrically connected in series. At least one of the wirings includes the first light-emitting element wiring and the second light-emitting element wiring. The wires are not joined, and the plurality of wirings for the first light-emitting element are joined to the first relay member. It includes the necessary wiring. [Effects of the Invention]

[0006] According to the present invention, multiple light-emitting elements arranged in a row are driven independently by two or more gates. A light-emitting device that is divided into loops and electrically connected can be provided.

Brief Description of the Drawings

[0007] [Figure 1] FIG. 1 is a perspective view of a light-emitting device according to each embodiment. [Figure 2] FIG. 2 is a top view of a light-emitting device according to each embodiment. [Figure 3] FIG. 3 is a cross-sectional view of the light-emitting device taken along line III-III of FIG. 2, with some components omitted. [Figure 4] FIG. 4 is a top view for explaining the wiring state of a light-emitting device according to the first embodiment. [Figure 5] FIG. 5 is a top view for explaining an example of the definition of an inter-line region, an intra-line region, and an extra-line region in a light-emitting device according to each embodiment. [Figure 6] FIG. 6 is a top view for explaining the wiring state of a light-emitting device according to the first modification of the first embodiment. [Figure 7] FIG. 7 is a top view for explaining the wiring state of a light-emitting device according to the second modification of the first embodiment. [Figure 8] FIG. 8 is a top view for explaining the wiring state of a light-emitting device according to the third modification of the first embodiment. [Figure 9] FIG. 9 is a top view for explaining the wiring state of a light-emitting device according to the fourth modification of the first embodiment. [Figure 10] FIG. 10 is a top view for explaining the wiring state of a light-emitting device according to the second embodiment. [Figure 11] FIG. 11 is a top view for explaining the wiring state of a light-emitting device according to the first modification of the second embodiment. [Figure 12] FIG. 12 is a top view for explaining the wiring state of a light-emitting device according to the second modification of the second embodiment. [Figure 13] FIG. 13 is a schematic view of a light-emitting element according to the third embodiment. [Figure 14A]FIG. 14A is a top view for explaining an example of a conventional wiring for a light-emitting element according to the third embodiment. [Figure 14B] FIG. 14B is a top view for explaining another example of a conventional wiring for a light-emitting element according to the third embodiment. [Figure 15A] FIG. 15A is a top view for explaining an example of a wiring for a light-emitting element in a light-emitting device according to the third embodiment. [Figure 15B] FIG. 15B is a top view for explaining another example of a wiring for a light-emitting element in a light-emitting device according to the third embodiment. [Figure 15C] FIG. 15C is a top view for explaining another example of a wiring for a light-emitting element in a light-emitting device according to the third embodiment. [Figure 15D] FIG. 15D is a top view for explaining another example of a wiring for a light-emitting element in a light-emitting device according to the third embodiment. [Figure 15E] FIG. 15E is a top view for explaining another example of a wiring for a light-emitting element in a light-emitting device according to the third embodiment. [Figure 15F] FIG. 15F is a top view for explaining another example of a wiring for a light-emitting element in a light-emitting device according to the third embodiment. [Figure 16A] FIG. 16A is a diagram comparing the temperature characteristics of the light output in the examples of the wirings of FIGS. 14A, 14B, 15A, and 15B. [Figure 16B] FIG. 16B is a diagram comparing the temperature characteristics of the forward voltage in the examples of the wirings of FIGS. 14A, 14B, 15A, and 15B. [Figure 16C] FIG. 16C is a diagram comparing the temperature characteristics of the forward voltage in the examples of the wirings of FIGS. 15B, 15C, and 15D. [Figure 16D] FIG. 16D is a diagram comparing the temperature characteristics of the forward voltage in the examples of the wirings of FIGS. 15A, 15E, and 15F.

MODE FOR CARRYING OUT THE INVENTION

[0008] In this specification or in the claims, with respect to polygons such as triangles and quadrilaterals, This includes polygons and shapes where the corners of a square have been processed with rounded corners, chamfers, or other similar processes. This shall be referred to as such. Furthermore, the same applies not only to corners (ends of edges) but also to shapes where processing has been done on the middle part of the edges. This will be referred to as a polygon. In other words, while retaining the polygon as a base, partial processing is performed. The resulting shape is included in the interpretation of “polygon” as described herein and in the claims. Let's assume that.

[0009] Furthermore, the same applies not only to polygons, but also to words describing specific shapes such as trapezoids, circles, and concave shapes. The same applies when dealing with each edge that forms that shape. In other words, on a certain edge... Even if the corners or middle sections have been processed, the interpretation of "edge" includes the processed parts. It is possible to distinguish between polygons and edges that have not undergone partial processing and processed shapes. The term "quadrilateral" should be preceded by the word "strictly" or "strictly," for example, "strictly quadrilateral."

[0010] Furthermore, in this specification or the claims, the up and down, left and right, front and back, front and back, and front and back Each description merely states the relative positions, orientations, and directions, and does not relate to the relationship during use. It doesn't have to match the assigned person.

[0011] Furthermore, directions such as the X, Y, and Z directions should be indicated in the drawing using arrows. There is an arrow. The direction of this arrow is consistent across multiple drawings of the same embodiment.

[0012] Furthermore, in this specification, when describing components, for example, the terms "component" or "part" may be used. It may be included. "Component" refers to an object that is treated as a single, physical unit. The objects handled by the body can also be defined as objects that are treated as individual parts in the manufacturing process. On the other hand, "part" refers to an object that does not need to be treated as a separate physical entity. For example, 1 The term "part" is used when referring to a portion of a component.

[0013] Furthermore, the distinction between "component" and "part" mentioned above is made with an awareness of the scope of rights in the interpretation of the doctrine of equivalents. This does not indicate an intention to limit the scope to "members" and Even if the listed components exist, that alone does not mean that these components are physically... The applicant does not believe that handling the invention in isolation is essential for its application. .

[0014] Furthermore, within this specification or the claims, there are multiple components, and each of them When distinguishing between them, the components are distinguished by adding "1st" or "2nd" to their names. Furthermore, the subject matter to be distinguished between this specification and the claims may differ. Therefore, the claims describe components that have the same annotations as those specified herein. However, if the subject matter identified by this component is not the same as the scope of this specification and the claims. It is possible that it will not happen.

[0015] For example, configurations that are distinguished in this specification by being designated as “First,” “Second,” and “Third.” The elements include the elements designated as “First” and “Third” in this specification, and the claims When describing the scope, for the sake of readability, the claims should be labeled as "First" and "Second". The components may be distinguished by adding the following note. In this case, the claims will be “first”. The components designated as “Second” are, in this specification, designated as “First,” “Third,” etc. This refers to the constituent elements. Note that this rule does not apply only to constituent elements, but also to other elements. It can be applied rationally and flexibly to other subjects as well.

[0016] The embodiments for carrying out the present invention will be described below. Furthermore, with reference to the drawings, Specific embodiments for carrying out the present invention will be described. The invention is not limited to this specific form. In other words, the illustrated embodiments are examples of how the present invention is realized. This is not the only form. Furthermore, the size and positional relationships of the components shown in each drawing are for ease of understanding. Sometimes things are exaggerated for the sake of accuracy.

[0017] <First Embodiment> A light-emitting device 1 according to the first embodiment will be described. Figures 1 to 5 show an exemplary light-emitting device 1. These are diagrams to explain the form. Figure 1 is a perspective view of the light-emitting device 1. Figure 2 is a perspective view of the light-emitting device This is a top view of Unit 1. Figure 3 is a cross-sectional view taken along the line III-III in Figure 2. Note that Figure 3 Therefore, to avoid making the diagram too complex, the components arranged on the base 12 will be omitted. Figure 4 shows the wiring that electrically connects the multiple light-emitting elements in the light-emitting device 1. This is a top view for illustrative purposes. Figure 5 shows the inter-line area and in-line area of ​​the light-emitting device 1, which will be described later. This is a top view showing an example of the definition of area and extra-row area.

[0018] The light-emitting device 1 comprises multiple components. These multiple components include a base 10 and multiple Light-emitting element 20, multiple submounts 30, one or more relay members 40, multiple reflective members The components include 50, multiple wires 60, a sealing member 70, and a lens member 80.

[0019] The light-emitting device 1 may also have other components. For example, the light-emitting device 1 may include: In addition to the multiple light-emitting elements 20, the device may also have further light-emitting elements. It is not necessary to possess some of the components listed here.

[0020] First, let's describe each component of the light-emitting device 1.

[0021] (Base 10) The base 10 has a base portion 12 and a side wall portion 14. The base portion 12 is mounted on other components. It has a mounting surface. The side wall portion 14 surrounds the mounting surface. The mounting surface is the upper surface of the base portion 12. The side wall portion 14 constitutes a side wall that extends upward from the mounting surface.

[0022] The base 12 has a protrusion 12a. That is, the base 12 has a first surface and a part above the first surface. It has a second face located on the first side and one or more sides connecting the first and second faces. The second face is actually It can become a mounting surface. The side wall can be formed laterally than the second surface. That is, the side wall portion 14 is the It can be formed to enclose the entire two surfaces.

[0023] At the base portion 12, the shape of the region surrounded by the side wall portion 14 is rectangular. This rectangle has a long side. The length is in the range of 15mm to 35mm, and the length of the shorter side is in the range of 10mm to 25mm. It can be within this range. The longer side can be between 1.4 and 2.5 times the shorter side. In the illustrated example of the base 10, this long side is parallel to the X direction, and this short side is parallel to the Y direction. They are parallel.

[0024] In a top view, the mounting surface is rectangular. The longer side of this rectangle is the longer side of the region enclosed by the side wall portion 14. It is parallel to the side, and the shorter side of this rectangle is parallel to the shorter side of the region enclosed by the side wall portion 14. The longer side of the rectangle shall be 0.75 times or more and less than 1 time the longer side of the area enclosed by the side wall portion 14. Yes, it is possible. The shorter side of this rectangle is 0.7 times or more and less than 1 time the shorter side of the area enclosed by the side wall portion 14. It is possible.

[0025] The base portion 12 and the side wall portion 14 may be composed of different materials. For example, the base Part 12 is formed using copper, copper tungsten, copper molybdenum, steel, or iron as the main material. It is composed of a base member, and the side wall portion 14 is formed using either steel or iron as the main material. It can be constructed using wall members. Furthermore, as one specific example, the main material can be oxygen-free. The base material is copper, and the main material is a soft metal with a carbon content in the range of 0.12% to 0.30%. One example is a base 10 formed by joining a wall member made of steel.

[0026] The main material is the material that accounts for the largest proportion by weight or volume in the object being formed. This refers to the material. Furthermore, if the target object is formed from a single material, The main material is this material. In other words, for a material to be the main material, it means that the proportion of that material is This includes the possibility of it being 100%.

[0027] Furthermore, if the base portion 12 and the side wall portion 14 are made of different materials as described above, the base portion 1 The shape of part 2, which has a protrusion 12a, can suppress warping of the mounting surface. The shape of the base 10 is not limited to this; for example, it may be flat. If the base 10 is flat, it does not have side walls 14.

[0028] The base 10 further has a plurality of wirings 16. The plurality of wirings 16 are arranged opposite each other across the mounting surface. The wiring includes a first wiring 161 and a second wiring 162. The wiring 16 includes a plurality of first Wiring 161 is included. Multiple wires 16 include multiple second wires 162. Multiple Wiring 16 includes the same number of second wirings 162 as there are multiple first wirings 161.

[0029] Each wiring 16 has an inner wiring area provided on the inside of the side wall and an outer wiring area provided on the outside of the side wall It has an outer wiring area and the inner wiring area and the outer wiring area of ​​the wiring 16 are electrically connected. For example, wiring 16 is provided by passing through the side wall portion 14.

[0030] The wiring 16 can be, for example, a lead pin that penetrates the side wall portion 14. Alternatively, the wiring 16 can be a metal film provided on the upper surface of the base 10. For example, it can be formed using metals such as Kovar, copper, and iron as the main material.

[0031] (Light-emitting element 20) The light-emitting element 20 emits light. The light-emitting element 20 has an upper surface, a lower surface, and one or more It has sides, one or more of which are light-emitting surfaces from which light is emitted. The device 20 emits light from one or more emission points on its light-emitting surface. These points are called light-emitting points. A specific example of the light-emitting element 20 is a semiconductor laser element.

[0032] The light-emitting element 20 may include, for example, a light-emitting element that emits blue light and a light-emitting element that emits green light. A light-emitting element that emits red light can be used. Furthermore, light-emitting elements that emit light of other colors may be employed.

[0033] Here, blue light is defined as light whose emission peak wavelength is in the range of 420 nm to 494 nm. This refers to green light, whose emission peak wavelength is in the range of 495 nm to 570 nm. This refers to light in the following range. Red light has an emission peak wavelength of 605 nm to 750 nm. This refers to light within a certain range.

[0034] Here, we will explain semiconductor laser elements. A semiconductor laser element, when viewed from above, has one side... It has a rectangular shape with opposite sides being the longer sides and the other opposite side being the shorter sides. The semiconductor laser element is located on the bottom surface Multiple semiconductor layers, including an active layer, are stacked in the upward direction from the surface. Two rectangular short The side containing one of the edges becomes the emission end face from which light is emitted. The emission end face can be considered the light emission surface of the light-emitting element 20. The upper and lower surfaces of the semiconductor laser element are The area is larger than the exit end face.

[0035] The light (laser beam) emitted from a semiconductor laser element has a broad beam. Divergent light is emitted from the exit end face. The light emitted from the semiconductor laser element is a semiconductor laser An elliptical far-field pattern (hereinafter referred to as "F") is formed on a plane parallel to the emission end face of the element. FFP refers to the shape of the emitted light at a position away from the exit end face. This refers to the shape and light intensity distribution.

[0036] Here, the light passing through the center of the elliptical shape of the FFP, in other words, the light intensity distribution of the FFP The light with peak intensity is referred to as light traveling along the optical axis, or light passing through the optical axis. In the light intensity distribution of FFP, 1 / e of the peak intensity value 2 Light having the above intensity, This will be referred to as the main part of the light.

[0037] The shape of the FFP (Flash Fault Plate) emitted from a semiconductor laser element is perpendicular to the stacking direction. It has an elliptical shape that is longer in the straight direction. The stacking direction refers to the direction in which the active layer is stacked in a semiconductor laser element. This refers to the direction in which multiple semiconductor layers are stacked. The direction perpendicular to the stacking direction is the direction of semiconductor It can also be said that it is the planar direction of the body layer. Furthermore, the major axis direction of the elliptical shape of the FFP is the semiconductor laser element The speed axis direction and the short axis direction can also be called the slow axis direction of the semiconductor laser element.

[0038] The light emitted from a semiconductor laser element is divergent light. Here, the light intensity distribution of the FFP is Based on 1 / e of the peak light intensity 2 The angle at which light of a given light intensity spreads is the light spreading angle of a semiconductor laser element. This is defined as the angle of divergence. The angle of divergence of light is 1 / e of the peak light intensity. 2 In addition to light intensity, for example, P It can also be determined from the light intensity at half the light intensity. In the description herein, "light" is sometimes used without further explanation. When we say "angle of divergence," we mean 1 / e of the peak light intensity. 2 This refers to the angle of light divergence at a given light intensity. It shall be assumed that the angle of expansion in the speed axis direction is greater than the angle of expansion in the slow axis direction. El.

[0039] A semiconductor laser element that emits blue light, or a semiconductor laser element that emits green light. Examples include semiconductor laser elements containing nitride semiconductors. Examples of nitride semiconductors include, for example... GaN, InGaN, and AlGaN can be used. A semiconductor that emits red light. As laser elements, InAlGaP, GaInP, GaAs, and AlGaAs are used. Examples include those containing conductors.

[0040] (Submount 30) The submount 30 has a bottom surface, a top surface, and one or more sides. 30 has the smallest width in the vertical direction. Submount 30 is composed of a rectangular prism shape. Oh, the shape doesn't have to be a rectangular prism. The submount 30 can be, for example, aluminum nitride. It can be formed using silicon nitride or silicon carbide as the main material.

[0041] (Relay member 40) The relay member 40 has a bottom surface, a top surface, and one or more sides. The width in the downward direction is smallest. The relay member 40 is composed of a rectangular parallelepiped shape. Note that the shape is straight It does not have to be a rectangular shape. The connecting member 40 can be, for example, silicon nitride, aluminum nitride, or It can be formed using silicon carbide and aluminum oxide as the main materials.

[0042] (Reflective member 50) The reflective member 50 has a light-reflecting surface that reflects light. The reflective member 50 has a lower surface and an upper surface. The light-reflecting surface is inclined with respect to the lower surface of the reflective member 50. In other words, the light-reflecting surface is inclined with respect to the reflective member It is neither perpendicular nor parallel to the lower surface of 50. The light-reflecting surface is flat, and the reflective member 5 It forms a 45-degree inclination angle with respect to the lower surface of 0. Note that the light-reflecting surface does not necessarily have to be flat, and also, The angle of inclination does not have to be 45 degrees.

[0043] The reflective member 50 can be formed using glass, metal, or the like as the main material. Heat-resistant materials are preferred, such as quartz or glass like BK7 (borosilicate glass), and aluminum. Metals such as nium can be used. In addition, the reflective member 50 is shaped using Si as the main material. It is also possible to do this. If the main material is a reflective material, a light-reflecting surface can be formed from the main material. This is possible. When forming a light-reflecting surface separately from the main material, for example, a metal film such as Ag or Al or T Dielectric multilayer films such as a2O5 / SiO2, TiO2 / SiO2, and Nb2O5 / SiO2 are formed. By applying a film, a light-reflecting surface can be formed.

[0044] The light-reflecting surface has a reflectance of 90% or more for the peak wavelength of the light shining on it. Furthermore, this reflectivity may be 95% or higher. Note that the reflectivity here is 100% or less. Or it is less than 100%.

[0045] (Wiring 60) The wiring 60 is composed of a conductive material having a linear shape with joints at both ends. The wiring 60 has joints at both ends of its linear portion that connect to other components. 0 is used for electrical connections between two components. Wiring 60 can be, for example, metal. Wires made primarily from these materials can be used. Examples of metals include gold, aluminum, silver, and copper. include.

[0046] (Sealing member 70) The sealing member 70 has an upper surface and a lower surface. The sealing member 70 has a high surface extending from the upper surface to the lower surface. It has a light-transmitting portion. Note that high light transmittance means that the light transmittance is 8. This refers to a transmittance of 0% or more. Furthermore, it means a transmittance of 80% or more for all wavelengths of light. It is not necessary to have a rate.

[0047] The sealing member 70 comprises a frame member having one or more openings and a covering for one or more openings. It may be configured to have one or more light-transmitting members. In this case, the frame member has high light transmission. It does not need to be luminescent. The light-transmitting member includes a light-transmitting portion.

[0048] The light-transmitting portion of the sealing member 70 is made of a light-transmitting material such as glass, sapphire, or quartz. It can be formed using as the main material. For example, metal can be used as the main material for the frame member. It is possible.

[0049] (Lens component 80) The lens member 80 has an upper surface, a lower surface, a side surface, and multiple lens surfaces. The surface is located on the upper side. Multiple lens surfaces form a matrix of 2 rows and N columns (where N is a natural number greater than or equal to 2). They are arranged in a certain manner. They may also be provided on the lower side.

[0050] The top and bottom surfaces are flat. Multiple lens surfaces intersect with the top surface. Multiple lens surfaces are on the top In a top view, it is enclosed by the top surface. In a top view, the lens member 80 has a rectangular outer shape. Lens The lower surface of member 80 is rectangular.

[0051] Here, in the lens member 80, the portion that overlaps with multiple lens surfaces when viewed from above is the lens portion. In the lens member 80, the portion that overlaps with the top surface when viewed from above is defined as the non-lens portion. When the part is divided into two by a hypothetical plane including the top surface, the lens surface side is the lens-shaped part, and the bottom surface side is the flat part. It is a plate-shaped part. The lower surface of the lens part is a part of the lower surface of the lens member 80.

[0052] The lens component 80 has high light transmittance. The entire lens portion has high light transmittance. The lens member 80 is formed using a translucent material such as glass or synthetic quartz as the main material. It is possible.

[0053] (Light-emitting device 1) Next, we will describe the light-emitting device 1 equipped with the above-mentioned components.

[0054] In the light-emitting device 1, multiple light-emitting elements 20 are arranged on a substrate 10. The element 20 is placed on the mounting surface of the substrate 10. The light emission points of the multiple light-emitting elements 20 are all It is also located above the mounting surface. Multiple light-emitting elements 20 are arranged within the arrangement area of ​​the mounting surface. In other words, the area within the mounting surface that can enclose multiple light-emitting elements 20 arranged on the mounting surface. The area can be designated as the placement area.

[0055] Multiple light-emitting elements 20 are arranged in a matrix. Multiple light-emitting elements 20 are arranged in 2 rows and N columns (N is The light emission points of the N light-emitting elements 20 arranged in the same row are in the row direction. They can be arranged in a line at equal intervals. Note that the light-emitting device 1 as a whole will be arranged in a matrix of three or more rows. To that end, multiple light-emitting elements may be arranged. Similarly, if the number of columns is greater than N To that end, additional light-emitting elements may be arranged.

[0056] The spacing between adjacent light-emitting elements 20 in the direction of the row is 1.2 mm or more and 4 mm or less. The distance between adjacent light-emitting elements 20 in the same direction is greater than the distance between adjacent light-emitting elements 20 in the same column direction. The size is also small. The spacing between adjacent light-emitting elements 20 in the row direction is between 4 mm and 8 mm.

[0057] In the illustrated example of the light-emitting device 1, the row direction in this matrix is ​​parallel to the X direction, and the column direction The direction is parallel to the Y direction. Furthermore, a semiconductor laser element is used as the light-emitting element 20. Furthermore, the multiple light-emitting elements 20 are arranged in a 2x7 grid. It is best to arrange them in three or more columns. This will align the orientation of the length and width of the placement area with the orientation of the length and width of the implementation surface. It is possible to arrange multiple light-emitting elements in a corresponding manner, and an efficient arrangement can be used to arrange multiple light-emitting elements.

[0058] With the placement area as the starting point, the first wiring 161 and the second wiring 162 are relative to each other from the placement area. They will be located at a distance in the opposite direction. Multiple first wirings 161 are located from the placement area. The multiple second wirings 162 are located at a distance in the first direction, and are opposite the first direction from the arrangement area. It is installed at a distance in that direction.

[0059] In the illustrated example of the light-emitting device 1, the first direction and the direction opposite to the first direction are parallel to the X direction. The same number of wires as the number of rows of the multiple light-emitting elements 20 arranged in a matrix, are connected to the first wiring 161 and A second wiring 162 is provided. In other words, the first wiring 161 and the second wiring 162 are each It consists of 16 wires, two at a time.

[0060] The multiple light-emitting elements 20 include one or more first light-emitting elements 20A and one or more second light-emitting elements 20A. The first light-emitting element 20B includes one or more third light-emitting elements 20C. 0A, the second light-emitting element 20B, and the third light-emitting element 20C can each be driven independently. An electrical connection will then be made. Details of this connection will be described later.

[0061] The first light-emitting element 20A, the second light-emitting element 20B, and the third light-emitting element 20C are different from each other. The first light-emitting element 20A, the second light-emitting element 20B, and the third light-emitting element 20C emit colored light. It emits light of different colors, selected from red light, green light, and blue light. .

[0062] Furthermore, multiple first light-emitting elements 20A emit light of the same color. Within sub-element 20A, the difference in peak wavelengths of emitted light is within 30 nm. The same can be said for 20B and the third light-emitting element 20C.

[0063] Each of the multiple first light-emitting elements 20A emits light with a peak wavelength of 3 nm or more. It may include two or more first light-emitting elements 20A that are different in the range of less than or equal to nm. The difference is preferably 3 nm to 5 nm. For example, the rays emitted from the light-emitting device 1 When using light for image display, by emitting light with different peak wavelengths within the same color... This can reduce speckle noise. Second light-emitting element 20B and third light-emitting element 2 Similarly, for 0C, it is possible to configure the system to emit multiple lights with different peak wavelengths. .

[0064] In the illustrated example of the light-emitting device 1, the first column to the seventh column of the second row are the first light-emitting element 20 In A, the first and second columns and the sixth and seventh columns of the first row are the second light-emitting element 20B, and the first row The third to fifth rows are the third light-emitting element 20C. Also, the first light-emitting element 20A is red. The second light-emitting element 20B emits green light, and the third light-emitting element 20C emits blue light, respectively. It is ejected.

[0065] In the illustrated example of the light-emitting device 1, the multiple first light-emitting elements 20A have peak wavelengths of emitted light. The first light-emitting element 20A has a first wavelength, and the second wavelength has a peak wavelength of emitted light that is greater than the first wavelength. The first light-emitting element 20A is included. The second wavelength is 3 nm or more longer than the first wavelength. It is large in the range of less than nm. Furthermore, multiple first light-emitting elements 20A have peaks in the emitted light. The first light-emitting element 20A includes a third wavelength which is greater than the second wavelength. The third wavelength is It is larger than the second wavelength in the range of 3 nm to 10 nm.

[0066] Preferably, the third wavelength is greater than the first wavelength by a range of 3 nm to 10 nm. Furthermore, the second wavelength is larger than the first wavelength by a range of 3 nm to 5 nm, and the The third wavelength is larger than the second wavelength by a range of 3 nm to 5 nm. It emits light of the same color. By keeping the difference between the maximum and minimum peak wavelengths of light within multiple light-emitting elements to 10 nm or less, It can emit light within a range where the color does not change significantly.

[0067] Each of the multiple light-emitting elements 20 is arranged so that its light-emitting surface faces sideways. The light-emitting elements 20 are arranged in a line such that their respective light-emitting surfaces face the same direction. Note that "same direction" here refers to the case where, when viewed from above, each light-emitting surface is within a range of ±5 degrees. This includes the combination. In the illustrated example of the light-emitting device 1, the light-emitting surface of the light-emitting element 20 is parallel to the X direction. It is perpendicular to the Y direction. Also, the optical axes of the light emitted from the multiple light-emitting elements 20 are parallel to the Y direction. It is a row.

[0068] Each of the light-emitting elements 20 is placed on a submount 30. Multiple light-emitting elements 20 are positioned on the mounting surface via mount 30. Multiple submounts It is positioned on top of 30. The submount 30 is provided in a one-to-one ratio with respect to the light-emitting element 20. .

[0069] Multiple submounts 30 have two or more submounts of different sizes, as seen from above. 30 is included. In the illustrated example of the light-emitting device 1, there are two submounts 3 of different sizes. Of the three, the first light-emitting element 20A is bonded to the submount 30 with the larger area. This improves heat dissipation to the first light-emitting element 20A.

[0070] Multiple reflective members 50 are arranged on the base body 10. It is placed on the mounting surface. Multiple reflective members 50 are placed within the placement area of ​​the mounting surface. By changing it, it becomes possible to surround the multiple reflective members 50 and light-emitting elements 20 arranged on the mounting surface. The area within the implementation surface can be used as the placement area.

[0071] Multiple reflective members 50 reflect light emitted from multiple light-emitting elements 20. Light reflected by 0 travels upward. The light-reflecting surface of the reflective member 50 passes through the optical axis. It is tilted at a 45-degree angle with respect to the direction of light propagation. Light passing through the optical axis is reflected by the reflective member 50. It is then reflected and travels in a direction perpendicular to the mounting surface. This direction is parallel to the Z-direction.

[0072] Multiple reflective members 50 reflect the main portion of the light emitted from multiple light-emitting elements 20. Thereafter, the reflective member 50 that reflects the main portion of the light emitted from the light-emitting element 20 is This may refer to a reflective member 50 that corresponds to the optical element 20.

[0073] Multiple reflective members 50 correspond to one or more first light-emitting elements 20A. Reflective member 50 and one or more reflective members corresponding to one or more second light-emitting elements 20B 50, and one or more reflective members 50 corresponding to one or more third light-emitting elements 20C, It is composed of including the following.

[0074] The reflective members 50 are provided in a one-to-one ratio with respect to the light-emitting element 20. Multiple reflective members 50 are provided, They are arranged in a matrix. Multiple reflective members 50 are arranged in 2 rows and N columns (where N is a natural number greater than or equal to 2). The N reflective members 50 arranged in the same row can be arranged at equal intervals. The reflective member 50 includes reflective members 50 corresponding to a plurality of light-emitting elements 20 arranged in a continuous line. It's okay to be there.

[0075] For example, the multiple reflective members 50 correspond to the multiple first light-emitting elements 20A arranged in a continuous line. A reflective member 50, a plurality of reflective members 50 corresponding to a plurality of second light-emitting elements 20B arranged in a row, and The system may also include reflective members 50 corresponding to a plurality of successively arranged third light-emitting elements 20C.

[0076] The light-reflecting surface of the reflective member 50 reflects more than 90% of the light from the main illuminated portion. The light-emitting device 1 does not necessarily have a reflective member 50. In this case, for example, the light-emitting element 20 The exit end face faces upward.

[0077] One or more relay members 40 are placed on the base 10. 40 is placed on the mounting surface of the base 10. One or more relay members 40 have 2 rows and N columns One or more first relay members 4 are arranged in the inter-row regions of the multiple light-emitting elements 20. It includes 0A.

[0078] The inter-row area is the area between rows of multiple components arranged in 2 rows and N columns, and the first row is the area between rows. This is the region between the constituent element and the constituent element of the second row. Therefore, multiple light-emitting elements 20 are arranged in two rows. The space between the rows, the space between the rows of multiple reflective members 50 arranged in two rows, and the multiple light-emitting elements 2 arranged in the first row. The inter-row region of multiple reflective members 50 arranged in rows 0 and 2, and the multiple reflective members 5 arranged in row 1 The inter-row regions of the multiple light-emitting elements 20 arranged in rows 0 and 2 can be defined accordingly. In descending order, these are called the first inter-row area, the second inter-row area, the third inter-row area, and the fourth inter-row area. It shall be considered as such.

[0079] The inter-row area is the region between two imaginary lines parallel to the row direction when viewed from above. The imaginary line passes through the position closest to the second row of a component that is arranged in multiple columns in the first row. A virtual line and a hypothetical line passing through the position closest to the first row of the components arranged in multiple columns in the second row. This is a line of thought. Note that in Figure 5, the first inter-line region A1 is shown with hatching as an example of an inter-line region. It is shown.

[0080] One or more first relay members 40A are a first inter-row region, a second inter-row region, a third inter-row region, Furthermore, it is positioned in the area where the fourth inter-row area overlaps. One or more first relay members 40A are, In the third and fourth inter-row regions, multiple light-emitting elements 20 and multiple reflectors are located within those regions. It is placed in the space between lines that does not include component 50.

[0081] One or more relay members 40 have out-of-row areas of multiple light-emitting elements 20 arranged in 2 rows and N columns. The region includes one or more second relay members 40B arranged in the area. The out-of-row region is two rows In one of the rows where elements are arranged in multiple columns, the position furthest from the other row is through This is the region that does not include this component, with a virtual line parallel to the direction of the 'r' as the boundary.

[0082] Therefore, the out-of-row region based on the multiple light-emitting elements 20 arranged in the first row, and the multiple reflections arranged in the first row. An out-of-row region based on member 50, an out-of-row region based on multiple light-emitting elements 20 arranged in the second row, and The out-of-row regions based on the multiple reflective members 50 arranged in the second row can be defined for each of them. Hereafter, these will be referred to as the first out-of-row region, the second out-of-row region, the third out-of-row region, and the fourth out-of-row region, respectively. Figure 5 shows an example of an out-of-row area, with the first out-of-row area A3 shown in hatching. It is.

[0083] One or more relay members 40 have the other end of the wiring 60, one end of which is joined to the wiring 16. It includes one or more third relay members 40C to be joined. Multiple light-emitting elements arranged in the row direction. From the light-emitting element 20 located at the end of 20, in the opposite direction to the direction in which the adjacent light-emitting element 20 is arranged. The third relay member 40C is positioned at a distance in that direction. The first relay member 40A and the second relay member 40B are both connected to the wiring 16. It may also be a relay member 40 to which the wiring 60 that cannot be connected is joined.

[0084] In addition to the space between lines and the space outside the line, an additional space inside the line can also be defined. An internal region is the inter-row region identified based on elements that are arranged in multiple columns within the same row. This is the area sandwiched between the line and the extra-line area. Figure 5 shows an example of the inter-line area, where the first line is lined up. The inline region A2 based on the optical element 20 is shown by hatching. This inline region A2 is the first This is the area sandwiched between the inter-row area A1 and the area outside the first row A3.

[0085] In the example of the light-emitting device 1 shown in Figure 4, the in-row region is based on the light-emitting elements 20 arranged in the first row. The configuration in which the connecting member 40 is arranged is shown. Also, the reflective members 50 arranged in the first row are based The diagram shows a configuration in which the relay member 40 is arranged in the area within the row.

[0086] Multiple wirings 60 are arranged so that multiple light-emitting elements 20 are electrically connected to multiple wirings 16. It can be connected. Among the multiple first wires 161 and multiple second wires 162, the multiple wirings 60 are connected. One or more first light-emitting elements 20A are electrically connected in series to the two wires 16, Includes wiring 60A for the first light-emitting element.

[0087] Multiple wirings 60 include two of the multiple first wirings 161 and multiple second wirings 162. Multiple second light-emitting elements 20B are electrically connected in series to the wiring 16. Includes 60B of wiring for the components.

[0088] Multiple wirings 60 include two of the multiple first wirings 161 and multiple second wirings 162. Multiple third light-emitting elements 20C are electrically connected in series to the wiring 16. Includes 60C wiring for the components.

[0089] Each of the two wires 16 that electrically connect one or more first light-emitting elements 20A in series The wiring 60A for the first light-emitting element is connected to it. Also, at least of these two wirings 16 The wiring for the second light-emitting element 60B and the wiring for the third light-emitting element 60C are connected to one of the wires. I can't.

[0090] Each of the two wires 16 that electrically connect one or more second light-emitting elements 20B in series The wiring 60B for the second light-emitting element is joined to it. Also, at least of these two wirings 16 The wiring for the first light-emitting element 60A and the wiring for the third light-emitting element 60C are connected to one of the wires. I can't.

[0091] Each of the two wires 16 that electrically connect one or more third light-emitting elements 20C in series The wiring 60C for the third light-emitting element is joined to it. Also, at least of these two wirings 16 The wiring for the first light-emitting element 60A and the wiring for the second light-emitting element 60B are connected to one of the wires. I can't.

[0092] Multiple wires 16 include a first light-emitting element wire 60A, a second light-emitting element wire 60B, and The wiring 16 includes a wiring 16 to which the wiring 60C for the third light-emitting element is joined. It is one of the wires 161 and multiple second wires 162.

[0093] Multiple first light-emitting element wirings 60A include wiring 60 that is connected to the first relay member 40A. This first relay member 40A is based on one of the first to fourth inter-row regions. A relay member 40A may also be used. One or more first intermediate wiring 60A for multiple first light-emitting elements Multiple wirings 60 joined to the connecting member 40A, and one or more first light-emitting elements 20A or It is in contact with one or more submounts 30 on which one or more first light-emitting elements 20A are mounted. This includes multiple wirings 60 that are connected.

[0094] One or more first light-emitting elements 20A are electrically connected to two first wirings 161. The wiring 60A for the first light-emitting element corresponds to one or more first light-emitting elements 20A. This is located on the opposite side of one or more first light-emitting elements 20A, with multiple reflective members 50 in between. Alternatively, it is joined to multiple first relay members 40A.

[0095] Furthermore, the multiple wirings 60A for the first light-emitting element correspond to one or more first light-emitting elements 20A. One or more reflective members 50 are surrounded by one or more first light-emitting elements 20A and are joined to one or more first relay members 40A.

[0096] In the illustrated example of the light-emitting device 1, of the two first wirings 161, the first light-emitting element 20A From the nearest first wiring 161, multiple first light-emitting elements 20A and multiple relay members are arranged in the row direction. Multiple first light-emitting element wirings 60A are connected in the following order: 40, and the other first wiring 161. These are joined together. In addition, multiple reflective members are arranged in the row direction corresponding to multiple first light-emitting elements 20A. There is no wiring 60A for the first light-emitting element that passes between adjacent reflective members 50.

[0097] Multiple wirings 60B for the second light-emitting element include wiring 60 that is connected to the second relay member 40B. This second relay member 40B is positioned in the extra-row region based on the second light-emitting element 20B. Based on the second relay member 40B, or the reflective member 50 corresponding to the second light-emitting element 20B This is a second relay member 40B located in the outer region. Multiple wiring 60B for the second light-emitting element are connected. This includes multiple wirings 60 joined to one or more second relay members 40B, and one or more One or more second light-emitting elements 20B or one or more second light-emitting elements 20B are mounted on one or more This includes multiple wires 60 that are joined to a number of submounts 30.

[0098] One or more second light-emitting elements 20B have one first wire 161 and one second wire 162 The wiring 60B for multiple second light-emitting elements connects to one or more third light-emitting elements. One or more third light-emitting elements 2 are placed between one or more reflective members 50 corresponding to child 20C. It is joined to one or more second relay members 40B located on the opposite side of 0C. The wiring 60B for the optical element has a second light-emitting element 20B and a third light-emitting element that are arranged adjacent to each other in the row direction. The relay member 40 is positioned between the two reflective members 50 corresponding to each of the elements 20C. This relay member 40 includes wiring 60B for the second light-emitting element 20 This is a second relay member 40B located in the extra-row region based on B. By avoiding 20C, the electrical connection of the second light-emitting element 20B can be made.

[0099] In the illustrated example of the light-emitting device 1, in the same row, the third light-emitting element 20C is located in one direction. One or more second light-emitting elements 20B are arranged in one direction from the third light-emitting element 20C One or more second light-emitting elements 20B are arranged in the opposite direction to this. Let us refer to these as the second light-emitting element 20B on one side and the second light-emitting element 20B on the other side, From the first wiring 161, the second light-emitting element 20B on one side, multiple relay members 40, and the second on the other side Multiple wirings 6 for second light-emitting elements are connected in the order of light-emitting element 20B and second wiring 162. 0B is joined.

[0100] Multiple wirings 60C for the third light-emitting element include wiring 60 that is connected to the first relay member 40A. This first relay member 40A is based on one of the first to fourth inter-row regions. A relay member 40A may also be used. The multiple wirings 60C for the third light-emitting element have, with respect to the row direction, the first wiring The side where the first wiring 161 is located further than the third light-emitting element 20C that is closest to wire 161. Multiple connections to one or more first relay members 40A located in the forward direction Wiring 60 is included. In addition, the multiple wirings 60C for the third light-emitting element have a second direction with respect to the row direction. The second wiring 162 is provided even further than the third light-emitting element 20C, which is closest to the wiring 162. Multiple connections to one or more first relay members 40A located in the direction of advancement This includes wiring 60.

[0101] One or more third light-emitting elements 20C have one first wire 161 and one second wire 162 They are electrically connected. Multiple wirings 60C for the third light-emitting element are in the inter-row region in the column direction. Regarding this, the third light-emitting element is more advanced than the first relay member 40A to which the first light-emitting element wiring 60A is joined. It is joined to one or more first relay members 40A located close to child 20C. The wiring 60C for the light-emitting element has a second light-emitting element 20B and a third light-emitting element that are arranged adjacent to each other in the row direction. The wiring 60C for the third light-emitting element is connected to the relay member 40 which is positioned between the optical elements 20C. One or more first relay members 40A have a third light-emitting element 20C or a third light-emitting element. The other end of the wiring 60, one end of which is connected to the submount 30 on which element 20C is mounted, is connected to the submount 30. Furthermore, one end of the wiring is connected to the first relay member 40A to which the first light-emitting element wiring 60A is connected. It includes a first relay member 40A that connects to the other end of the wire 60.

[0102] In the illustrated example of the light-emitting device 1, one or more first relay members 4 are connected from the first wiring 161. 0A, multiple third light-emitting elements 20C arranged in the row direction, one or more first relay members 40A, Multiple wirings 60C for the third light-emitting element are joined together in the order of wiring 162.

[0103] One or more relay members 40 include a first light-emitting element wiring 60A and a second light-emitting element wiring 60B and a relay member 40 to which are joined are included. Multiple wirings 60 are for the first light-emitting element This includes wiring 60, which is both wiring 60A and wiring 60B for the second light-emitting element. This allows for simplified wiring.

[0104] One or more relay members 40 include a first light-emitting element wiring 60A and a third light-emitting element wiring The relay member 40 is connected to 60C. The connecting member 40A may be the relevant component. Among the multiple wires 60, there is the first light-emitting element wire 60A and the second This includes wiring 60C which is also wiring for 3 light-emitting elements. This allows the desired position of the inter-row area to be In this configuration, two current paths can be merged.

[0105] The relay member 40 to which the first light-emitting element wiring 60A and the second light-emitting element wiring 60B are joined The relay member 40 to which the wiring for the first light-emitting element 60A and the wiring for the third light-emitting element 60C are joined is This allows for different configurations. This allows for adjusting the number of wires connected to a single relay member 40. It can be arranged.

[0106] In this configuration, where the current paths are merged, the multiple wirings 60 have the first light-emitting element. Wiring 60 that functions only as wiring 60A, and wiring 60B that functions only as wiring for the second light-emitting element Wiring 60 that functions as a third light-emitting element wiring 60C, and at least Wiring 60 that functions as a first light-emitting element wiring 60A and a second light-emitting element wiring 60B, It will be included. In addition, the multiple wirings 60 will further include at least the wiring for the first light-emitting element. Wiring 60 may include wiring 60A and wiring 60C for the third light-emitting element. The wiring 60 includes wiring 60A for the first light-emitting element, wiring 60B for the second light-emitting element, and wiring 60B for the third light-emitting element. The wiring 60 may include wiring 60C that functions as wiring for an optical element.

[0107] Multiple relay members 40 include a first light-emitting element 20A, a second light-emitting element 20B, and a third light-emitting element. The relay member 40 includes a current path for element 20C that merges into it. A third relay member 40C may be applicable. The wiring 60 connected to the first relay member 40A includes the first It functions as wiring 60A for the light-emitting element, and as wiring 60B for the second light-emitting element, and furthermore, Wiring 60, which also functions as wiring 60C for the third light-emitting element, is not included.

[0108] In the illustrated example of the light-emitting device 1, multiple first light-emitting elements 20A are electrically connected to two wires 16. The current path connected to the first light-emitting element 20A is the first path that electrically connects only the first light-emitting element 20A, the first light-emitting element A second path electrically connects only element 20A and the third light-emitting element 20C, and the first light-emitting element 20 A, a third path that electrically connects the second light-emitting element 20B and the third light-emitting element 20C, It is composed of the following. Also, the physical length of each path is as follows: Path 1, Path 2, Path 3 The paths get shorter in the order of the three paths. The length of the first path is equal to the length of the second path and the length of the third path. It is more than twice the sum of the lengths.

[0109] In the light-emitting device 1, the area of ​​the multiple relay members 40 when viewed from above is the submount 3 It includes intermediate members 40 that are smaller than those of 0. All of the intermediate members 40 are, when viewed from above, The product can be made smaller than that of submount 30. This allows for a smaller inter-line area. This provides convenience in selecting the number and position of the multiple relay members 40 that are to be placed.

[0110] The number of relay members 40 arranged in the light-emitting device 1 can be greater than 2 × N. The number of relay members 40 arranged in the light-emitting device 1 is greater than the number of multiple light-emitting elements 20. This is possible. The number of relay members 40 arranged in the light-emitting device 1 is equal to the number of submounts 30. It can be done to the extent of more.

[0111] The intermediate member 40 is formed from the same material as the submount 30, or from the same main material. The relay member 40 may be formed using a different main material than the submount 30. In this case, it is preferable that the submount 30 has a higher thermal conductivity than the relay member 40. i. In the submount 30, heat dissipation from the heat generated from the light-emitting element 20 should be considered. While this is preferable, since the light-emitting element 20 is not mounted on the relay member 40, submount There may be cases where a thermal conductivity lower than 30 is acceptable.

[0112] The sealing member 70 seals the space in which the multiple light-emitting elements 20 are arranged. The light-emitting elements 20 are It can be placed in a sealed, airtight space. This reduces the shadow of dust collection on the light-emitting element 20. The degradation of light quality due to resonance can be suppressed.

[0113] The sealing member 70 is positioned on the side wall of the base body 10. The upper surface of the side wall and the bottom of the sealing member 70 The surfaces are joined. The frame member of the sealing member 70 is joined to the side wall. Reflection by the reflective member 50. The light transmitted passes through the sealing member 70. The light from the main part passes through the light-transmitting portion of the sealing member 70. And it is emitted from the sealing member 70. 90% or less of the main portion of the light emitted from the light-emitting element 20 The top part is ejected from the sealing member 70.

[0114] The lens member 80 is located above the multiple light-emitting elements 20. The lens member 80 is a sealing part It is positioned above material 70. The lens member 80 is joined to the sealing member 70. Lens member Part 80 is joined, for example, using a UV-curable adhesive. When using a UV-curable adhesive, The mounting position of the lens component 80 can be adjusted before joining it at the desired position.

[0115] The lens member 80 allows light emitted from each light-emitting element 20 to pass through each lens surface. They are positioned to be fired from there.

[0116] <Modified form of the first embodiment> Next, a light-emitting device according to a modified version of the first embodiment will be described. Several modified versions are described below. The following is presented, but each modified light-emitting device differs from the light-emitting device 1 of the first embodiment in that it has multiple light-emitting elements. The arrangement of the 20 is different. Therefore, the wiring is different due to the different arrangement of the multiple light-emitting elements 20. There are also differences in the connection methods of the 60 components and the arrangement of the relay components 40.

[0117] In each modified light-emitting device, the base body 10, the reflective member 50, the sealing member 70, and the lens The component 80 is the same as that of the light-emitting device 1 in the first embodiment. Therefore, these components Regarding the elements, the same can be said as described in the light-emitting device 1 of the first embodiment.

[0118] In each modified light-emitting device, the light-emitting element 20, the submount 30, the relay member 40, and For a description of each component of the wiring 60, see the description of each component in the first embodiment. The same can be said as in the explanation.

[0119] Figure 1 is a perspective view of the light-emitting device according to each modified example, and Figure 2 is a perspective view of the light-emitting device according to each modified example. This is a top view. In each modified example, the inter-line area, the in-line area, and the out-of-line area are as in the first embodiment. This is the same definition as the one described in the description of the luminescent device 1.

[0120] Figures 6 to 9 are diagrams relating to the various modifications described below. Regarding the light-emitting device in question, the content of the light-emitting device 1 of the first embodiment has already been explained. Regarding the content that does not result in inconsistencies when compared with the diagram of the modified version, the light-emitting device of that modified version... The same can be said for the other case.

[0121] <First variation> Figure 6 shows the wiring that electrically connects the multiple light-emitting elements in the light-emitting device 1A according to the first modified example. This is a top view illustrating the appearance of the lines. In the example of the light-emitting device 1A shown, the second row is 1 Columns 1 through 7 are the first light-emitting element 20A, and columns 1 through 3 and 6 of the first row and The 7th column is the second light-emitting element 20B, and the 4th and 5th columns of the 1st row are the third light-emitting element 20C. Yes. Also, the first light-emitting element 20A emits blue light, the second light-emitting element 20B emits red light, and the third... Each light-emitting element 20C emits green light.

[0122] In the light-emitting device 1A, the third light-emitting element 20C is flanked by the third light-emitting element 20C on both sides of the third light-emitting element 20C. Two light-emitting elements 20B are arranged. Regarding the second light-emitting elements 20B arranged on both sides, one The peak wavelength of light emitted from the second light-emitting element 20B located on one side is located on the other side. The peak wavelength of the light emitted from the second light-emitting element 20B is 3 nm to 10 nm greater than the peak wavelength of the light emitted from the second light-emitting element 20B. It is large within the range below.

[0123] Multiple second light-emitting elements 20B are arranged on one side, and multiple second light-emitting elements 20 B is positioned. The peak wave of light emitted from the second light-emitting element 20B positioned on one side The lengths are all within the range of less than 3 nm. The peak wavelengths of the emitted light are all within a range of less than 3 nm.

[0124] Multiple second light-emitting elements 20B located on one side, and multiple second light-emitting elements located on the other side The number of light-emitting elements is greater than that of the light-emitting element 20B, and the peak wavelength of the emitted light is shorter. For example, when using a red light-emitting element, the light-emitting element with a shorter peak wavelength will have a higher luminous intensity. Because the quality is good, increasing the number of light-emitting elements with shorter peak wavelengths makes it brighter. It can be made to do so.

[0125] In the state where it is mounted on the submount 30, the upper surface of the first light-emitting element 20A in the light-emitting device 1 is different from the electrode on the upper surface of the first light-emitting element 20A in the light-emitting device 1A. In the light-emitting device 1 among the plurality of first light-emitting elements 20A arranged in the row direction, the first light-emitting element 20A located at the end is joined to the submount 30 on which it is placed and the first relay member 40A by wiring 60. In the light-emitting device 1A, among the plurality of first light-emitting elements 20A arranged in the row direction, the upper surface of the first light-emitting element 20A located at the end and the relay member 40 (hereinafter referred to as the fourth relay member 40D which is arranged outside the inter-row region) are joined by wiring 60. In the illustrated light-emitting device 1A, the fourth relay member 40D is arranged in the fourth row outer region. By arranging the fourth relay member 40D in this way, the wiring 60 can be joined so as not to be located on the optical path of the light reflected by the reflector member 50.

[0126] <Second Modified Example> FIG. 7 is a top view for explaining the state of the wiring for electrically connecting a plurality of light-emitting elements provided in the light-emitting device 1B according to the second modified example. The light-emitting device 1B is the same as the light-emitting device 1 in terms of the arrangement of the first light-emitting element 20A, the second light-emitting element 20B, and the third light-emitting element 20C, and the color of the emitted light.

[0127] In the light-emitting device 1B, the plurality of first light-emitting elements 20A include a first light-emitting element 20A having a peak wavelength of the emitted light of the first wavelength, a first light-emitting element 20A having a peak wavelength of the emitted light of the second wavelength, and a first light-emitting element 20A having a peak wavelength of the emitted light of the third wavelength. Hereinafter, they are simply referred to as the first light-emitting element 20A of the first wavelength, the first light-emitting element 20A of the second wavelength, and the first light-emitting element 20A of the third wavelength respectively. ​​​​​This will be referred to as the optical element 20A.

[0128] In the light-emitting device 1B, the number of first light-emitting elements 20A of the first wavelength is arranged as follows: The number of light-emitting elements 20A is greater than the number of elements that can be arranged. The first light-emitting element 20A of the first wavelength is arranged. The number is greater than the number of first light-emitting elements 20A of the third wavelength that are arranged.

[0129] Multiple first wavelength first light-emitting elements 20A include a second wavelength first light-emitting element 20A and a third wavelength This includes a first light-emitting element 20A positioned between the first light-emitting elements 20A. Element 20A has a second wavelength first light-emitting element 20A positioned between two first wavelength first light-emitting elements 20A The device includes a light-emitting element 20A. Multiple first light-emitting elements 20A emit two first wavelengths of first light. This includes a third wavelength first light-emitting element 20A that is positioned between the elements 20A.

[0130] In a plurality of first light-emitting elements 20A arranged side by side, adjacent first light-emitting elements 20A are The peak wavelengths of the emitted light differ between them in the range of 3 nm to 10 nm. The first wavelength, the second From the two wavelengths and the third wavelength, multiple first emission values ​​are generated such that no two wavelengths are adjacent to each other. Element 20A is positioned.

[0131] In the illustrated light-emitting device 1B, the peak wavelength of the light emitted from the first light-emitting element 20A of the first wavelength is It is below 640 nm. The peak wavelength of the light emitted from the first light-emitting element 20A at the third wavelength is 645 nm. It is m or greater. Among the multiple first light-emitting elements 20A, the first light-emitting element with the smallest peak wavelength of emitted light is... The difference in peak wavelength between element 20A and the largest first light-emitting element 20A is 10 nm or less. . At both ends of a plurality of first light-emitting elements 20A arranged in the row direction, and between both ends, a first light of the first wavelength The optical element 20A is positioned. The first light-emitting element 20A of the first wavelength, positioned between the two ends, is the base point. Thus, the first light-emitting element 20A of the second wavelength and the first light-emitting element 20A of the third wavelength are arranged symmetrically. It can be done.

[0132] In light-emitting device 1B, the direction of current flow is opposite to that of light-emitting device 1. In light-emitting device 1, the direction of current flow is in the row direction. Of the multiple first light-emitting elements 20A arranged in a row, the first light-emitting element 20A located at the end is placed on top. Wiring 60 was connected to the submount 30 and the first relay member 40A. In the light-emitting device 1B, The upper surface of the first light-emitting element 20A located at the end of the row of multiple first light-emitting elements 20A arranged in the row direction Then, the wiring 60 is connected to the first relay member 40A. This first relay member 40A has two It is positioned between the reflective members 50. This first relay member 40A is connected to this first light-emitting element 20A. It is positioned in the row region based on the corresponding reflective member 50. The light-emitting device 1B has multiple first-waves Between adjacent reflective members 50 that are arranged in the row direction corresponding to the optical element 20A There is a wiring 60A for the first light-emitting element that passes through. The first relay member 40A is arranged in this manner. This reduces the number of relay members 40.

[0133] <Third variation> Figure 8 shows the wiring that electrically connects the multiple light-emitting elements in the light-emitting device 1C according to the third modified example. This is a top view illustrating the appearance of the lines. In the example of the light-emitting device 1C shown, the second row is 1 The first, fourth, and seventh columns are the first light-emitting element 20A, and the first row from the first column to the seventh column is In the second light-emitting element 20B, the second, third, fifth, and sixth columns of the second row are the third light-emitting element. The temperature is 20C. Also, the first light-emitting element 20A emits blue light, and the second light-emitting element 20B emits red light. The third light-emitting element 20C emits green light.

[0134] In the light-emitting device 1C, one or more second relay members 40B are arranged in the out-of-line regions on both sides in the column direction so as to sandwich the inter-line region. The light-emitting device 1C includes one or more second relay members 40B arranged in the first out-of-line region or the second out-of-line region, and one or more second relay members 40B arranged in the third out-of-line region or the fourth out-of-line region. The illustrated light-emitting device 1C includes one or more second relay members 40B arranged in the second out-of-line region, and a plurality of second relay members 40B arranged in the third out-of-line region.

[0135] In the light-emitting device 1C, a plurality of first light-emitting elements 20A are arranged at both ends in the row direction, and a plurality of third light-emitting elements 20C are arranged so as to sandwich the first light-emitting elements 20A arranged between both ends. Based on the first light-emitting elements 20A arranged between both ends, a plurality of third light-emitting elements 20C and another plurality of first light-emitting elements 20A are symmetrically arranged.

[0136] In the illustrated light-emitting device 1C, the relationship between the wavelengths and the arrangements of the plurality of second light-emitting elements 20B arranged in the row direction is the same as that of the plurality of first light-emitting elements 20A in the light-emitting device 1 or the plurality of first light-emitting elements 20A in the light-emitting device 1B. In the light-emitting device 1C, the second light-emitting elements 20B having the first wavelength, the second light-emitting elements 20B having the second wavelength, and the second light-emitting elements 20B having the third wavelength are arranged side by side in the same manner as the plurality of first light-emitting elements 20A of the light-emitting device 1B. arranged.

[0137] In the light-emitting device 1C, one or more first light-emitting elements 20A are electrically connected to one first wiring 161 and one One or more third light-emitting elements 20C are electrically connected to the second wiring 162, and one first wiring Electrically connect wire 161 to one second wire 162.

[0138] <Fourth variation> Figure 9 shows the wiring that electrically connects the multiple light-emitting elements in the light-emitting device 1D according to the fourth modified example. This is a top view illustrating the arrangement of lines. In the light-emitting device 1D, the first light-emitting element 20 is arranged in one row. A, the second light-emitting element 20B, and the third light-emitting element 20C are arranged. Also, in either of the two rows In this configuration, the first light-emitting element 20A, the second light-emitting element 20B, and the third light-emitting element 20C are arranged They are placed. Also, in the first and second rows, light-emitting elements 20 emit light of the same color in the same column. They are placed.

[0139] In the illustrated example of the light-emitting device 1A, the 5th to 7th columns of the first row and the 5th column of the second row The first light-emitting element 20A is located in the 3rd and 4th columns of the 1st row, and the 3rd column of the 2nd row. The first and fourth columns are the second light-emitting element 20B, and the first row, first column and second column, and the first row, first column The first and second rows are the third light-emitting element 20C. The first light-emitting element 20A emits red light. The second light-emitting element 20B emits blue light, and the third light-emitting element 20C emits green light. ru.

[0140] In the light-emitting device 1D, the second relay member 40B is arranged in two rows in the area outside the row. One or more second relay members 40B are arranged in each of them. Alternatively, a current path passing through multiple second relay members 40B, and one or more arranged in the second row. The current path passing through the second relay member 40B is connected to the light-emitting element 20, which emits light of different colors. Connect them electrically.

[0141] In the light-emitting device 1D, in order to electrically connect the first light-emitting elements 20A of the first and second rows, One or more first relay members 40A are arranged in the inter-row region. Second light emission for the first and second rows. In order to electrically connect element 20B, one or more first relay members 40A are provided in the inter-row region. The third light-emitting element 20C of the first and second rows is electrically connected in the inter-row region. One or more first relay members 40A are arranged therein.

[0142] In the light-emitting device 1D, the wiring 60A for the first light-emitting element and the wiring 60B for the second light-emitting element are both However, the relay member 40 to which the wiring 60 is joined is not located in the first inter-row region. A relay where wiring 60, which is both the element wiring 60A and the third light-emitting element wiring 60C, is joined. Component 40 is not placed in the first inter-row region. It is also the wiring 60B for the second light-emitting element and the third light-emitting element. The relay member 40, to which the wiring 60 which is also the element wiring 60C is joined, is located in the first inter-row region. I can't.

[0143] <Second Embodiment> Next, a light-emitting device 2 according to the second embodiment will be described. Figures 1 to 3 and Figure 10 show the light-emitting device. This is a diagram illustrating an exemplary form of the light-emitting device 2. Figure 1 is a perspective view of the light-emitting device 2. Yes. Figure 2 is a top view of the light-emitting device 2. Figure 3 is a cross-section along the line III-III in Figure 2. This is a diagram. Figure 10 shows the wiring that electrically connects the multiple light-emitting elements in the light-emitting device 2. This is a top view to explain the second embodiment. In addition, in the second embodiment, the inter-line area, the in-line area, Furthermore, the out-of-line region has the same definition as described in the light-emitting device 1 of the first embodiment.

[0144] The light-emitting device 2 comprises multiple components. These multiple components include a base 10, multiple Multiple light-emitting elements 20, multiple submounts 30, one or more relay members 40, multiple reflectors The component includes a member 50, multiple wires 60, a sealing member 70, and a lens member 80. The light device 2 may also have other components. It is not necessary to have some of the components.

[0145] Of the above-described explanations relating to the light-emitting device 1 and its components in the first embodiment, the explanation relating to the light-emitting device 2 Regarding the content that does not cause any inconsistencies when compared with Figures 1 to 3 and Figure 10, the light-emitting device 2 is... The same can be said for [another location].

[0146] In the light-emitting device 2, each of the multiple light-emitting elements 20 has one or more first light-emitting elements 20A and The first light-emitting element 20A and the second light-emitting element 20B are included. Each element 20B is electrically connected so that it can be driven independently.

[0147] The first light-emitting element 20A and the second light-emitting element 20B emit light of the same color from each other. The light element 20A and the second light-emitting element 20B are selected from red light, green light, and blue light. It emits light of the color specified. For example, the first light-emitting element 20A and the second light-emitting element 20B emit blue light. It emits light.

[0148] For example, all the light-emitting elements 20 arranged in the row direction are connected in series, and the light-emitting elements in different rows Compared to driving 20 individually, the overall amount of light emitted by each drive is The size can be contained within a region that is closer to a square. Such a region allows for optical control. There are times when it is preferable to perform this task.

[0149] Alternatively, the first light-emitting element 20A and the second light-emitting element 20B emit light of different colors from each other. The first light-emitting element 20A and the second light-emitting element 20B emit red light, green light, and , it emits light of different colors selected from blue light. For example, the first light-emitting element 20A The first light-emitting element emits blue light, and the second light-emitting element 20B emits green light.

[0150] In the illustrated example of light-emitting device 2, the first row and columns 1 through 5, and the second row and column 1 The first five columns are the first light-emitting element 20A, and the sixth and seventh columns of the first row and the sixth column of the second row The 7th row is the second light-emitting element 20B. Also, the first light-emitting element 20A emits blue light, The two light-emitting elements 20B each emit green light.

[0151] With respect to a plurality of light-emitting elements 20 arranged in a matrix, in each of two adjacent rows, Both the first light-emitting element 20A and the second light-emitting element 20B are arranged in the same row. Furthermore, adjacent In each of the two matching rows, there are multiple first light-emitting elements 20A and multiple second light-emitting elements in the same row. Unit 20B will be placed there.

[0152] In the example of the light-emitting device 2 shown in Figure 10, the row-based region based on the reflective members 50 arranged in the first row The configuration in which the relay member 40 is arranged is shown. Also, the reflective members 50 lined up in the second row The diagram shows a configuration in which the relay member 40 is arranged in the base row area.

[0153] In the light-emitting device 2, two of the multiple wires 16, specifically the first wires 161, are connected to the first light-emitting element. Wire 60A is joined, and two of the multiple wires 162 second wires 162 are connected to the second light-emitting element. Wiring 60B is joined. Wiring 60A for the first light-emitting element is connected to any of the multiple second wirings 162. The wiring 60B for the second light-emitting element is not connected to any of the multiple first wirings 161. It will not be done.

[0154] In a top view, the first light-emitting element 20A and the second light-emitting element 20B are adjacent in the row direction (in Figure 10, In the direction of the column passing through the first light-emitting element 20A in the 5th column and the second light-emitting element 20B in the 6th column. Between two parallel virtual lines, a relay member 40 is connected to the wiring 60A for the first light-emitting element, and A relay member 40 is positioned to which the wiring 60B for the two light-emitting elements is joined.

[0155] Between these two virtual lines, the relay member 4 to which the wiring 60A for the first light-emitting element is joined. 0 is located in the inter-row area, and the relay member 40 to which the wiring 60B for the second light-emitting element is joined is located outside the row. It is placed in the region. In the illustrated example of the light-emitting device 2, the first light-emitting element is placed in the first inter-row region A1. A relay member 40 to which the wiring 60A is joined is positioned, and the first row outer region and the third row outer region are respectively A relay member 40 to which the wiring 60B for the second light-emitting element is connected is positioned.

[0156] Except for the third relay member 40C, the relay member 40 to which the wiring 60 for the first light-emitting element is joined is the The area where the first and second outer row regions overlap, and the area where the third and fourth outer row regions overlap. Not located in any of the regions. The region where the first row outer region and the second row outer region overlap, and the third row. The wiring 60 for the second light-emitting element is joined to each of the regions where the outer region and the fourth row outer region overlap. One or more relay members 40 that are relay members 40 but not third relay members 40C are arranged.

[0157] Of the first light-emitting element 20A and the second light-emitting element 20B that are adjacent in the row direction, the first light-emitting element 20 When the arrangement region is divided into two by a virtual line passing through A and parallel to the column direction, the second light-emitting element 20B is included. In the region that is not available, the wiring for the second light-emitting element 60B, and the wiring for the second light-emitting element 60B The connecting member 40 is not provided.

[0158] Of the first light-emitting element 20A and the second light-emitting element 20B that are adjacent in the row direction, the second light-emitting element 20 When the arrangement region is divided into two by a virtual line passing through B and parallel to the column direction, the first light-emitting element 20A is included. In the area that cannot be reached, the wiring for the first light-emitting element 60A, and the wiring for the first light-emitting element 60A The connecting member 40 is not provided.

[0159] <Variations of the second embodiment> Next, a light-emitting device according to a modified example of the second embodiment will be described. Several modified examples are described below. The following is presented, but each modified example of the light-emitting device differs from the light-emitting device 2 of the second embodiment in that it has multiple light-emitting elements. The arrangement of the 20 is different. Therefore, the wiring is different due to the different arrangement of the multiple light-emitting elements 20. There are also differences in the connection methods of the 60 components and the arrangement of the relay components 40.

[0160] In each modified light-emitting device, the base body 10, the reflective member 50, the sealing member 70, and the lens The component 80 is the same as the light-emitting device 2 of the second embodiment. Therefore, these components Regarding the elements, the same can be said as described in the light-emitting device 1 of the first embodiment.

[0161] In each modified light-emitting device, the light-emitting element 20, the submount 30, the relay member 40, and For a description of each component of the wiring 60, see the description of each component in the first embodiment. The same can be said as in the explanation.

[0162] Figure 1 is a perspective view of the light-emitting device according to each modified example, and Figure 2 is a perspective view of the light-emitting device according to each modified example. This is a top view. In each modified example, the inter-line area, the in-line area, and the out-of-line area are as in the first embodiment. This is the same definition as the one described in the description of the luminescent device 1.

[0163] Figures 11 and 12 are diagrams relating to the various modifications described below. Regarding the modified light-emitting device, the content of the light-emitting device 2 of the second embodiment has already been explained. Regarding the content that does not result in inconsistencies when compared with the diagram of the modified version, the light-emitting device of that modified version is... The same can be said for [another location].

[0164] <First variation> Figure 11 shows the electrical connection of multiple light-emitting elements provided in the light-emitting device 2A according to the first modified example. This is a top view illustrating the wiring. In the example of the light-emitting device 2A shown, the first row The first four columns and the first four columns of the second row are the first light-emitting element 20A, The 5th to 7th columns of the first row and the 5th to 7th columns of the second row are the second light-emitting element 20B. That is the case.

[0165] As shown in the second embodiment and this first modification, across multiple rows, two adjacent specific columns The first light-emitting element 20A is placed on one side of the boundary, and the second light-emitting element 20B is placed on the other side. This can be done, and two specific columns can be selected as appropriate.

[0166] <Second variation> Figure 12 shows the electrical connection of multiple light-emitting elements provided in the light-emitting device 2B according to the second modified example. This is a top view illustrating the wiring. In the example of the light-emitting device 2B shown, the first line The first three columns and the first four columns of the second row are the first light-emitting element 20A, The 4th to 7th columns of the first row and the 5th to 7th columns of the second row are the second light-emitting element 20B. That is the case.

[0167] In the light-emitting device 2B, multiple first light-emitting elements are arranged in 2 rows and M columns (where M is a natural number greater than or equal to 3 and is odd). The same number of child 20A and multiple second light-emitting elements 20B are arranged. Also, in column M In the central column (the column where M+1 is divided by 2), only in one of the two rows, the first The light-emitting element 20A is placed in the other row, and the second light-emitting element 20B is placed in the other row. Either the first light-emitting element 20A is placed in both rows, or the second light-emitting element is placed in both rows. Either child 20B is placed there or something else.

[0168] Two parallel lines in the column direction passing through each of the light-emitting elements 20 located in the columns adjacent to the central column Between the dotted lines, there is a relay member 40 to which the wiring 60A for the first light-emitting element is joined, and the second light-emitting element A relay member 40 to which wiring 60B is joined is positioned. Of the inter-row area, these two virtual A relay member 40 is placed in the region between the lines, to which the wiring 60A for the first light-emitting element is joined.

[0169] <Third Embodiment> A light-emitting device 3 according to the third embodiment will be described. Figures 13 to 16D are examples of the light-emitting device 3. This is a diagram illustrating one typical form. Figure 13 shows the light-emitting element 20 in the light-emitting device 3. This is a schematic diagram. Figures 14A and 14B show examples of conventional wiring to the light-emitting element 20, respectively. This is a top view showing the light-emitting element 20 in the light-emitting device 3. This is a top view showing an example of wiring. Note that in Figures 13 to 15F, the waveguide 22 is shown with a dashed line. Figure 16A shows the wiring examples in Figures 14A, 14B, 15A, and 15B. This figure compares the temperature characteristics of the light output. Figure 16B is a comparison of Figures 14A, 14B, and 15A. Figure 16 shows a comparison of the temperature characteristics of the forward voltage in the wiring example shown in Figure 15B. C represents the temperature characteristics of the forward voltage in the wiring examples shown in Figures 15B, 15C, and 15D. This is a comparative diagram. Figure 16D shows the wiring examples in Figures 15A, 15E, and 15F. This figure compares the temperature characteristics of forward voltage.

[0170] Figures 1 to 9 also serve as diagrams illustrating the light-emitting device 3. Furthermore, the first embodiment and The description of the light-emitting device for each modified example also serves as the description of light-emitting device 3. However, the first example described above... Of the descriptions of the implementation form and the light-emitting device of each modified form, among Figures 13 to 16D, the light-emitting device Regarding any inconsistencies between the drawing related to installation 3 and the description of the light-emitting device 3 below, please refer to the following. This does not fit the description of optical device 3.

[0171] The light-emitting device 3 comprises multiple components. These multiple components include a base 10, and This includes multiple light-emitting elements 20, one or more submounts 30, and one or more relay members 40. , one or more reflective members 50, multiple wirings 60, sealing members 70, and lens members 80 It includes.

[0172] Furthermore, the light-emitting device 3 may have other components. The light-emitting device of the first embodiment and each of its modifications does not have to have the same structure. The invention disclosed by the light-emitting device 3 is such that a plurality of light-emitting elements arranged in a row are each driven independently. This may apply not only to light-emitting devices that are electrically connected and divided into two or more possible groups. ru.

[0173] The light-emitting device 3 has one or more light-emitting elements 20, each having two or more light-emitting elements on its light-emitting surface. The system includes a light-emitting element 20 having a firing point 21. For example, the light-emitting element 20 is a semiconductor laser element. Furthermore, in the light-emitting device 3, the first light-emitting element 20A emits two or more such light It can become a light-emitting element 20 having point 21. Hereafter, for convenience, the first light-emitting element 20A will be referred to as this light-emitting element. The light-emitting device 3 will be described assuming that element 20 is the light-emitting element. Note that instead of the first light-emitting element 20A, Alternatively, similar to the first light-emitting element 20A, the second light-emitting element 20B or the third light-emitting element 20C The light-emitting surface may have two or more light-emitting points 21.

[0174] The first light-emitting element 20A has two or more waveguides 22, each corresponding to a different light emission point 21. The waveguides 22 each extend in a direction perpendicular to the light emission surface when viewed from above. Note that the vertical in this context includes a difference of ±5 degrees. Also, waveguide 22 is perpendicular to the light emission surface. It does not need to be designed to extend directly.

[0175] Figure 13 shows a device with two light emission points 21 (first light emission point 21A and second light emission point 21B). This shows the light-emitting element 20. Also, the first waveguide 22A corresponding to the first light emission point 21A, The diagram shows a light-emitting element 20 having a second waveguide 22B corresponding to a second light emission point.

[0176] Figures 14A and 14B show a first light emission having two light emission points 21 and two waveguides 22. These figures illustrate a conventional method of connecting wiring 60 to element 20A. As such, on the upper surface of the first light-emitting element 20A that intersects with the light-emitting surface, the bonding positions are The wiring 60 is joined so that it is directly above the waveguide 22. Also, each waveguide 22 Directly above, the wires 60 are joined so that they are evenly distributed.

[0177] In this type of connection, the wiring is routed as evenly or symmetrically as possible to each waveguide 22. By joining 60, the current flows evenly, and the light output and the current applied to each waveguide 22 are equalized. The technical concept is to ensure that there is no imbalance in the electrical load, thereby allowing the light-emitting element to operate stably. It is thought to be derived from that.

[0178] On the other hand, depending on the amount of current supplied to the first light-emitting element 20A, In some cases, it is preferable to connect multiple wires 60 rather than just one. This leads to the idea of ​​connecting the wiring 60 as shown in Figures 14A and 14B. In other words, according to this technological concept, the number of wires 60 connected to the first light-emitting element 20A is The number of waveguides will be an integer multiple of the number of waveguides 22. For example, in relation to the input current, the wiring If we want to reduce the number of 60s to two, we must consider the electrical load on each waveguide 22, and the waveguide One might arrive at the idea of ​​providing two wires for every 22 units, totaling 60 units.

[0179] Figures 15A to 15F show the conventional configuration and wiring that is not based on the same technical concept. This illustrates a bonding configuration of 0. The bonding configuration illustrated here is one in which the first light-emitting element 20 This can be applied to a light-emitting device 3 that has two to five wires 60 joined to the upper surface of A. Furthermore, not limited to this, six or more wires 60 may be connected to the upper surface of the first light-emitting element 20A of 1. Even with the light-emitting device 3, it can still be applied.

[0180] Multiple wires 60 are connected to the upper surface of the first light-emitting element 20A in the light-emitting device 3. The wiring 60A for the first light-emitting element includes multiple wires 60 that are joined to the upper surface of the first light-emitting element 20A. It is made. Furthermore, the multiple wires 60 that are joined to the upper surface of the first light-emitting element 20A of 1 described here are , joined at one end to the upper surface of the first light-emitting element 20A, and at the other end this first light-emitting element 20 The focus may be narrowed to wiring 60 that connects to common components other than A. In other words, multiple wiring The wiring 60 does not include wiring 60 where the components joined at the other end are different. For example, among the multiple wirings 60 joined to the upper surface of the first light-emitting element 20A, at the other end Multiple wires 60 are connected to the submount 30, and the other end is connected to a Zener diode. If there is a wiring 60 that does not meet the criteria, the latter can be excluded from consideration.

[0181] As shown in Figures 15A to 15F, wiring 6 is joined to the upper surface of the first light-emitting element 20A 1 The number of zeros is two or more. Also, as shown in Figures 15B to 15D, the first light-emitting element of 1 The number of wires 60 connected to the top surface of 20A is three or more. In this way, the first light-emitting element of 1 The number of wires 60 connected to the top surface of 20A may be even or odd. In other words, A configuration is adopted in which an odd number of wires 60 are connected to a light-emitting element 20 having two waveguides 22. It is possible.

[0182] In the light-emitting device 3, when viewed from above, the bonding position on the upper surface of the first light-emitting element 20A is the first guide The number of wirings 60 located in the region overlapping with waveguide 22A, and the number of wirings located in the region overlapping with the second waveguide 22B. The number of wires 60 is either 0 for each, or at least one of each is present. In this case, these numbers are not equal. Figures 15A, 15B, 15E, and 15F are The former (where both are 0) is shown as an example, and Figures 15C and 15D show the latter (where at least one is 0). This shows an example of (where the number is not equal to the number of connections). Note that the connection point refers to the wiring connected to the top surface. This refers to the center point of the joint shape of 0.

[0183] Regarding the plurality of wirings 60 that are joined to the upper surface of the first light-emitting element 20A, the The junction position of the light-emitting element 20A with the upper surface is closest to the second waveguide 22B of the first waveguide 22A. A virtual line passing through point I and perpendicular to the light emission surface (hereinafter referred to as the first virtual line), and the second waveguide 22B A virtual line (hereinafter referred to as the second virtual line) passes through the point closest to the first waveguide 22A and is perpendicular to the light emission surface. It is located in the region between ( ). Note that the region between the first virtual line and the second virtual line here is the The areas on the first and second virtual lines are not included. Figures 15A, 15B, 15E, and 15 F illustrates this example. By setting the connection point of the wiring 60 in this region, for example, This method provides a more stable connection of the wiring 60 than connecting it to the edge of the upper surface of the light-emitting element 20A. It is possible.

[0184] Regarding the plurality of wirings 60 that are joined to the upper surface of the first light-emitting element 20A, the The junction position with the top surface of the light-emitting element 20A is, when viewed from above, the second waveguide 2, with the first dashed line as the boundary. It is either located only in the region containing 2B, or, with the second virtual line as the boundary, the first waveguide when viewed from above. It exists only in the region that includes path 22A. Furthermore, in identifying these regions, the first virtual line... The upper and second dashed lines are not included. Figure 15D shows an example of the former, and Figure 15C shows an example of the latter. It is.

[0185] With respect to a plurality of wirings 60 that are connected to the upper surface of the first light-emitting element 20A, these plurality of wirings 60 are connected On the upper surface of the first light-emitting element 20A that is joined together, the first virtual line is used as the boundary between the first light-emitting element 20 When the upper surface of A is divided into two, the junction is located in a region that does not include the second waveguide 22B when viewed from above. The number of wires 60 is 0, and the upper surface of the first light-emitting element 20A is divided into two sections with the second virtual line as the boundary. The number of wirings 60 whose junctions are located in a region that does not include the first waveguide 22A when viewed from above after division. It is 0. Note that in identifying these regions, the first virtual line and the second virtual line are not included. No. Figures 15A, 15B, 15E, and 15F illustrate this example.

[0186] Regarding the multiple wirings 60 that connect to the upper surface of the first light-emitting element 20A, the first virtual line and the second virtual line The first light-emitting element 20A has a boundary with a virtual line (hereinafter referred to as the third virtual line) which is the median line between the two. The number of wirings 60 with junction points in the region on the side of the first waveguide 22A when the upper surface is divided in two, and the second The number of wirings 60 with junction locations in the region on the waveguide 22B side is either 0 or If there is at least one of either of these, the number is not equal. In this case, the third virtual line is not included.

[0187] On the upper surface of the first light-emitting element 20A, with respect to the direction perpendicular to the light-emitting surface, the closest to the light-emitting surface The distance between the wiring 60 at the lowest position and the wiring 60 at the position furthest from the light emission surface is the distance to the light emission surface. The distance between the surface and the wiring 60 closest to the light-emitting surface and the distance between the surface opposite the light-emitting surface and the light-emitting surface It is greater than the absolute value of the difference in distance between the furthest point of wiring 60 on the firing plane and the target. (Figure 15) Of Figures A through 15F, all except Figure 15E illustrate this example.

[0188] With respect to the direction perpendicular to the light-emitting surface, between the multiple wirings 60 that are joined to the upper surface of the first light-emitting element 20A The distance is between 200 μm and 500 μm. It is joined to the upper surface of the first light-emitting element 20A. The number of multiple wires 60 is such that the length of the wires perpendicular to the light-emitting surface of the first light-emitting element 20A is 500 μm. The number obtained by dividing by m (rounded down to the nearest whole number), or the number obtained by dividing by 200 μm (decimal place value). (Fractions below this point are rounded down.)

[0189] The experimental results shown in Figures 16A to 16D will be discussed below. In experiment D, the first light-emitting element 20A was a laser with an emission peak wavelength of 643 nm. A semiconductor laser element that emits light was used. Each of the wirings 60 in Figures 15A to 15F Regarding the bonding configuration, five first light-emitting elements 20A were prepared, and the average of the five measured values ​​was taken as shown in Figure The measurement results are plotted in Figures 16A to 16D. Furthermore, the temperature characteristics were measured twice. The tests were conducted at 5°C, 45°C, and 60°C. Note that the temperature was measured inside the sealed package. This is determined by driving a semiconductor laser element and measuring the temperature of the package.

[0190] As shown in Figure 16A, the number of wires 60 that connect to the upper surface of the first light-emitting element 20A is Even with the change, no significant difference was observed in the temperature characteristics of the optical output [W]. Also, unlike conventional methods... No significant differences were observed when comparing the wiring connection methods corresponding to each waveguide 22. In other words, even if the junction method is not conventional, it does not significantly affect the temperature characteristics of the optical output Po[W]. It can be said that it is.

[0191] As shown in Figure 16B, the number of wires 60 that connect to the upper surface of the first light-emitting element 20A is The smaller the value, the higher the forward voltage Vf [V] tends to be. On the other hand, Vf with respect to temperature changes No significant differences were observed in the rate of change (slope of each line in Figure 16B). By reducing the number of units to 60, not only are manufacturing costs reduced, but manufacturing time is also shortened. Productivity improves. When balancing with the increase in Vf, the upper surface of the first light-emitting element 20A The number of wires 60 connected to it is preferably 3 to 5.

[0192] As shown in Figure 16C, when viewed from above, if the direction perpendicular to the light-emitting surface is defined as the up and down direction, Even if the same number of wires (60) are arranged towards the center, to the right, or to the left, each wire No significant differences were observed when comparing the positions. Also, the odors in Figures 15B to 15D We then checked if there was a bias in the faulty emitters by increasing the input current, but the center was No different trends or patterns were observed between the right-leaning and left-leaning areas. In other words, the center Even if the wiring 60 is positioned to one side or the other, the waveguide 22 that is close to the wiring 60 and the waveguide that is far away It is believed that there was no significant bias in the current supplied to wave path 22.

[0193] As shown in Figure 16D, connecting the same number of wires 60 as in Figure 15E is better than connecting them as in Figure 1 Joining as in 5A or Figure 15F results in a lower Vf. Figure 15E shows the position close to the light emission surface. In this arrangement, the fact that multiple wires 60 are joined at narrow intervals is shown in Figures 15A and 15A. It differs from F. It is located close to the light-emitting surface and connects multiple wires 60 at wide intervals. Figure 15A shows that multiple wires 60 are joined at narrow intervals at a position far from the light emission surface, as shown in Figure 1. Comparing with 5F, the distance to the light emission surface, the spacing or distance between multiple wirings 60, and the light emission It is thought that the relationship between one surface and the opposite surface, such as the distance between them, can affect the temperature characteristics of Vf. .

[0194] In the illustrated light-emitting device 3, the number of waveguides 22 is exemplified by a light-emitting element 20 with two elements. However, even if the light-emitting element 20 has three or more waveguides 22, the arrangement described in the second embodiment The joining method of line 60 can be applied.

[0195] For example, on the upper surface of a light-emitting element 20 having two or more waveguides 22 in a top view, each With respect to the waveguide 22, the number of wirings 60 whose junction locations are within the region overlapping with the waveguide 22 is If the deviation is 0, or if there is at least one of them, then these numbers They are not equal in number.

[0196] For example, multiple wirings are joined to the upper surface of a light-emitting element 20 having two or more waveguides 22. The junction position 60 is, in a top view, indicated by a virtual line parallel to the direction in which the waveguide 22 extends, which represents the light-emitting element. It is located in the middle region when the top surface of 20 is divided into three equal parts. In addition, the joining position is in the regions at both ends. If the number of wires 60 is 0, or if there is at least one of any of them, These numbers are not equal.

[0197] Furthermore, in that it does not rely on conventional joining methods, it is a light-emitting element having two or more waveguides 22. The number of wires 60 joined to the upper surface of child 20 is less than the number of waveguides 22 multiplied by 2. This can be done. Note that the wire diameter (Φ diameter) of the wiring 60 at this time should be 50 μm or more. It is preferable that the diameter be 00 μm or less. The larger the wire diameter, the higher the current that can be stably applied. Therefore, it is set to 50 μm or more. Also, the wiring connection shape on the upper surface of the light-emitting element 20 is large. To prevent it from becoming too thin, it is preferable to keep the particle size below 100 μm.

[0198] Furthermore, in a light-emitting element 20 having two or more waveguides 22, the electrodes to which the wiring 60 is joined are also included. The thickness can be between 0.1 μm and 10 μm. Also, the thickness of this electrode can be 0.3 μm It is preferable that the electrode thickness be between m and 0.5 μm. By ensuring sufficient electrode thickness, the current It becomes easier to spread. For example, due to the strength of the substrate, semiconductors containing GaAs-based semiconductors The laser element has a larger electrode thickness than semiconductor laser elements containing GaN-based semiconductors. There is a light-emitting element 20 having two or more waveguides 22 is a GaAs-based semiconductor laser element. In some cases, this type of wiring connection configuration is particularly well-suited to this embodiment.

[0199] The embodiments of the present invention have been described above, but the light-emitting device according to the present invention is as follows: And is not strictly limited to the light-emitting devices of each modified form. In other words, the present invention is not strictly limited to each embodiment This can only be realized if it is not limited to the external form or structure of the light-emitting device disclosed in the original form or each modified form. It is not necessary. Furthermore, it is not required to have all components in sufficient quantity when applying. This is what can be obtained. For example, the configuration of the light-emitting device disclosed by the embodiment in the claims. If some elements are not listed, those elements may be replaced, omitted, or replaced. The degree of design freedom of those skilled in the art, such as deformation of shape and change of materials, is acknowledged, and then the scope of the patent claims is defined accordingly. This specifies that the invention described in the box is applicable. [Industrial applicability]

[0200] The light-emitting device described in each embodiment is a projector, an in-vehicle headlight, a head-mounted light It can be used for displays, lighting, and other applications. [Explanation of Symbols]

[0201] 1, 2, 3 Light-emitting devices 10 Base 12 Base 12a Convex part 14 Side wall section 16 Wiring 161 1st wiring 162 2nd wiring 20 Light-emitting elements 20A First light-emitting element 20B Second light-emitting element 20C Third Light-Emitting Device 21 Light emission point 21A 1st light output point 21B 2nd light output point 22 Waveguides 22A 1st waveguide 22B 2nd waveguide 30 Submount 40 Intermediate members 40A First relay member 40B Second relay member 40C Third relay member 40D Fourth relay member 50 Reflective material 60 Wiring 60A Wiring for the first light-emitting element 60B Wiring for the second light-emitting element 60C Wiring for the 3rd Light-Emitting Device 70 Sealing member 80 Lens components A1 interline area A2 inline area A3 extra line area

Claims

1. Equipped with a semiconductor laser element, The semiconductor laser element has a top surface, a light emission surface having two light emission points consisting of a first light emission point and a second light emission point, and a first waveguide corresponding to the first light emission point and a second waveguide corresponding to the second light emission point. Two to five wires are connected to the aforementioned upper surface. A light-emitting device characterized in that, when viewed from above, the number of wirings in the region where the junction position on the upper surface of the semiconductor laser element overlaps with the first waveguide and the number of wirings in the region where they overlap with the second waveguide are both zero, or if there is at least one of them, they are not the same number.

2. The light-emitting device according to claim 1, wherein the number of wires joined to the upper surface is three or five.

3. The light-emitting device according to claim 1, wherein each of the wires joined to the upper surface has one end joined to the upper surface of the semiconductor laser element and the other end joined to a common component other than the semiconductor laser element.

4. The light-emitting device according to claim 1, wherein the spacing between adjacent wirings joined to the upper surface is 200 μm or more and 500 μm or less.

5. The light-emitting device according to claim 1, wherein the semiconductor laser element is a red light-emitting laser element.

6. The light-emitting device according to any one of claims 1 to 5, wherein the connection position of the wiring joined to the upper surface of the semiconductor laser element is in the region between a first imaginary line passing through the point of the first waveguide closest to the second waveguide and perpendicular to the light-emitting surface, and a second imaginary line passing through the point of the second waveguide closest to the first waveguide and perpendicular to the light-emitting surface.

7. The light-emitting device according to any one of claims 1 to 5, wherein the connection position of the wiring joined to the upper surface of the semiconductor laser element is, in a top view, within a first region including the second waveguide with the first virtual line as the boundary, or within a second region including the first waveguide with the second virtual line as the boundary, in relation to a first virtual line passing through the point of the first waveguide closest to the second waveguide and perpendicular to the light-emitting surface, and a second virtual line passing through the point of the second waveguide closest to the first waveguide and perpendicular to the light-emitting surface.

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