JP2017147400A - Light receiving/emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light receiving/emitting device which enables the reduction in size of an electronic device to be mounted thereon.SOLUTION: A light receiving/emitting device A1 comprises: a light-emitting element 1 operable to emit detection light L; a light-receiving element 2 operable to receive detection light L having progressed in a z2 direction as a result of reflection by a detection target object 89 after launching to a z1 direction; and optical path-changing means 5 having a reflection surface 51 for causing the detection light L progressing in the z2 direction to travel toward a light-receiving element 2 by reflecting the detection light L to an x1 direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a light emitting / receiving device.

  Patent Document 1 discloses an example of a conventional light emitting and receiving device. The light emitting / receiving device includes a substrate, a light emitting element and a light receiving element mounted on the substrate. The light emitting / receiving device includes a light-transmitting resin that covers the light-emitting element and the light-receiving element, and a light-blocking resin that partially covers the light-transmitting resin. The detection light emitted from the light emitting element is received by the light receiving element when reflected by the detection object. Thereby, it can be detected that the detection target exists at a position facing the light emitting / receiving device.

  However, an electronic device on which the light emitting / receiving device is mounted needs to be provided with an opening or the like that allows the detection light from the light emitting element and the detection light toward the light receiving element to pass therethrough. The larger the distance between the detection light from the light emitting element and the detection light toward the light receiving element, the larger the opening or the like. This hinders downsizing of the electronic device.

JP 2010-341889 A

  The present invention has been conceived under the circumstances described above, and an object of the present invention is to provide a light emitting / receiving device capable of reducing the size of an electronic device to be mounted.

  The light emitting / receiving device provided by the present invention includes a light emitting element that emits detection light, and the light emitted from one side in the first direction and reflected by the detection target to travel to the other side in the first direction. A light receiving / receiving device including a light receiving element that receives detection light, wherein the detection light traveling in the other side in the first direction is reflected in a second direction intersecting the first direction to the light receiving element. And an optical path changing means having a reflecting surface that travels in the first direction by reflecting the detection light traveling in the second direction from the light emitting element. Yes.

  In a preferred embodiment of the present invention, a light emitting element support that supports the light emitting element, and a light receiving element support that is positioned on one side in the second direction with respect to the light emitting element support and supports the light receiving element. And comprising.

  In preferable embodiment of this invention, the said light emitting element support part and the said light receiving element support part are comprised by the separate member.

  In a preferred embodiment of the present invention, the light emitting element support part and the light receiving element support part are configured as an integral member.

  In a preferred embodiment of the present invention, the light emitting element support portion has a light emitting side support surface facing one side in the first direction and supporting the light emitting element, and the light receiving element support portion is the second light emitting element support portion. It has a light receiving side support surface that faces the other side of the direction and supports the light receiving element.

  In a preferred embodiment of the present invention, the reflection surface of the optical path changing means is formed on the light emitting element support.

  In a preferred embodiment of the present invention, the reflecting surface is located between the light emitting element and the light receiving element in the first direction, and the light emitting element, the reflecting surface, and the light receiving element are It is lined up in the first direction.

  In a preferred embodiment of the present invention, the reflecting surface is aligned with the light emitting element in a third direction that is perpendicular to both the first direction and the second direction.

  In a preferred embodiment of the present invention, the optical path changing means is located on one side in the first direction with respect to the light emitting element and overlaps with the light emitting element as viewed in the first direction, The detection light traveling on one side in the first direction is transmitted and the detection light traveling on the other side in the first direction is reflected on one side in the second direction.

  In a preferred embodiment of the present invention, the light emitting element support portion includes a light emitting side main surface facing the one side in the first direction, a recess from the light emitting side main surface to the other side in the first direction, and the light emitting side support surface. And a light emitting side recess having a bottom surface.

  In a preferred embodiment of the present invention, the light emission side recess has a light emission side recess side surface connecting the light emission side main surface and the light emission side support surface.

  In a preferred embodiment of the present invention, the light emitting side recess side surface is inclined with respect to the first direction.

  In a preferred embodiment of the present invention, the light emitting element support part has a light emitting side support surface that faces the one side in the second direction and supports the light emitting element, and the light receiving element support part includes the first light receiving element support part. It has a light receiving side support surface that faces one direction and supports the light receiving element.

  In a preferred embodiment of the present invention, the reflection surface of the optical path changing means is formed on the light receiving element support.

  In a preferred embodiment of the present invention, the reflecting surface is aligned with the light receiving element in a third direction that is perpendicular to both the first direction and the second direction.

  In a preferred embodiment of the present invention, the optical path changing means is located on the one side in the first direction with respect to the light receiving element and overlaps with the light receiving element in the first direction view, The detection light traveling to the other side in the first direction is transmitted and the detection light traveling to the one side in the second direction is reflected to the one side in the first direction.

  In a preferred embodiment of the present invention, the light emitting element support portion includes a light emitting side main surface facing the one side in the second direction, a recess from the light emitting side main surface to the other side in the second direction, and the light emitting side support surface. And a light emitting side recess having a bottom surface.

  In a preferred embodiment of the present invention, the light emission side recess has a light emission side recess side surface connecting the light emission side main surface and the light emission side support surface.

  In a preferred embodiment of the present invention, the light emitting side recess side surface is inclined with respect to the second direction.

  In a preferred embodiment of the present invention, the light emitting element support has a light emitting side mounting surface facing the other side in the first direction.

  In a preferred embodiment of the present invention, the light emitting element support has a light emitting side mounting electrode formed on the light emitting side mounting surface.

  In a preferred embodiment of the present invention, the light receiving element support portion has a light receiving side mounting surface facing the other side in the first direction.

  In a preferred embodiment of the present invention, the light receiving element support portion has a light receiving side mounting electrode formed on the light receiving side mounting surface.

  According to the present invention, it is possible to reduce the size of an electronic device to be mounted.

  Other features and advantages of the present invention will become more apparent from the detailed description given below with reference to the accompanying drawings.

It is a top view which shows the example of a use structure of the light emitting / receiving apparatus based on 1st Embodiment of this invention, and the said light receiving / emitting apparatus. It is sectional drawing which follows the II-II line | wire of FIG. It is a side view which shows the light emitting / receiving device based on 1st Embodiment of this invention. It is a bottom view which shows the light emitting / receiving apparatus based on 1st Embodiment of this invention. It is a principal part front view which shows the light emitting / receiving device based on 1st Embodiment of this invention. It is a top view which shows the light emitting / receiving apparatus based on 2nd Embodiment of this invention. It is sectional drawing which follows the VII-VII line of FIG. It is a top view which shows the modification of the light emitting / receiving apparatus based on 2nd Embodiment of this invention. It is sectional drawing which follows the IX-IX line of FIG. It is sectional drawing which follows the XX line of FIG. It is a top view which shows the light emitting / receiving apparatus based on 3rd Embodiment of this invention. It is sectional drawing which follows the XII-XII line | wire of FIG. It is sectional drawing which shows the light emitting / receiving apparatus based on 4th Embodiment of this invention. It is a top view which shows the light emitting / receiving apparatus based on 5th Embodiment of this invention. It is sectional drawing which follows the XV-XV line | wire of FIG. It is sectional drawing which shows the light emitting / receiving apparatus based on 6th Embodiment of this invention. It is sectional drawing which shows the light emitting / receiving device based on 7th Embodiment of this invention. It is sectional drawing which shows the light emitting / receiving apparatus based on 8th Embodiment of this invention.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 5 show a light emitting and receiving device according to a first embodiment of the present invention. The light emitting / receiving device A1 of the present embodiment includes a light emitting element 1, a light receiving element 2, a light emitting element support 3, a light receiving element support 4, and an optical path changing means 5, and is configured as a so-called photo reflector.

  FIG. 1 is a plan view showing a configuration example of use of the light emitting / receiving device A1 and the light emitting / receiving device A1. 2 is a cross-sectional view taken along line II-II in FIG. FIG. 3 is a side view showing the light emitting / receiving device A1. FIG. 4 is a bottom view showing the light emitting / receiving device A1. FIG. 5 is a main part front view showing the light emitting / receiving device A1. In these drawings, the direction corresponding to one side in the first direction in the present invention is the z1 direction, the direction corresponding to the other side in the first direction is the z2 direction, the direction corresponding to one side in the second direction is the x1 direction, The direction corresponding to the other side of the two directions is defined as the x2 direction, and the third direction is defined as the y direction. In addition, when simply indicating the first direction, it is referred to as the z direction, and when simply indicating the second direction, it is referred to as the x direction. The same applies to the following embodiments.

  The light emitting element 1 is a light source of the light receiving and emitting device A1, and is an LED chip that emits detection light L such as infrared light. The light emitting element 1 is supported by the light emitting element support 3. In the light-emitting element 1 of the present embodiment, electrodes are formed on each of the surface facing the z1 direction and the surface facing the z2 direction. One end of a wire 19 is connected to the electrode formed on the surface facing the z1 direction. The electrode formed on the surface facing the z2 direction is bonded to the light emitting element support 3 by a conductive bonding material.

  The light receiving element 2 receives the detection light L after being reflected by the detection object 89. The light receiving element 2 is a phototransistor, a photodiode, or a photo IC having a photoelectric conversion function. The light receiving element 2 is supported by the light receiving element support 4. The light receiving element 2 has a light receiving unit 21. The light receiving unit 21 is a part that faces the x2 direction and receives the detection light L traveling in the x1 direction. The light receiving element 2 is supported by the light receiving element support 4.

  The light emitting element support 3 supports the light emitting element 1. The light emitting element support part 3 of the present embodiment includes a light emitting side substrate 31 and a light emitting side metal layer 32.

  At least the surface layer of the light emitting side substrate 31 is made of an insulating material. Examples of the material of the light emitting side substrate 31 include insulating resins such as silicone resin and epoxy resin, and ceramics. In the illustrated example, the light emitting side base material 31 is formed by die molding using an insulating resin. The light emitting side base material 31 of this embodiment has a light emitting side main surface 310, a light emitting side recess 311, a light emitting side mounting surface 315, a light emitting side side surface 316, a groove 317, and a light emitting side inclined surface 318.

  The light emitting side main surface 310 is a surface facing the z1 direction. The light emitting side recess 311 is recessed from the light emitting side main surface 310 in the z2 direction. The light emission side recess 311 has a light emission side support surface 312 and a light emission side recess side surface 313. The light emitting side support surface 312 is a surface facing the z1 direction, and supports the light emitting element 1. Thereby, in this embodiment, the detection light L emitted from the light emitting element 1 travels in the z1 direction. The light emitting side recess side surface 313 connects the light emitting side main surface 310 and the light emitting side support surface 312. The light emitting side recess side surface 313 is inclined with respect to the z direction. However, the light emission side recessed part side surface 313 may not be inclined with respect to the z direction. The light emitting side recess 311 may be filled with a translucent resin that covers the light emitting element 1. In addition, the light emission side base material 31 is not limited to the structure which has the light emission side recessed part 311, The structure which does not have the light emission side recessed part 311 may be sufficient. In this case, the light emission side main surface 310 is a surface corresponding to the light emission side support surface 312.

  The light emitting side mounting surface 315 faces the z2 direction, and is a surface facing the mounting substrate 80 in a state where the light emitting and receiving device A1 is mounted on the mounting substrate 80. The light emitting side surface 316 connects the light emitting side main surface 310 and the light emitting side mounting surface 315, and is along the z direction. In the present embodiment, the light emitting element support portion 3 has four light emitting side surfaces 316. Grooves 317 are formed in the pair of light emitting side surfaces 316 that are separated in the y direction. The groove portion 317 is recessed from the light emitting side surface 316 in the y direction, and vertically cuts the light emitting side surface 316 in the z direction. Further, the pair of groove portions 317 are arranged with the light emitting side concave portion 311 interposed therebetween in the y direction.

  The light emitting side inclined surface 318 is parallel to the y direction and is inclined with respect to the z direction and the x direction. More specifically, the light emitting side inclined surface 318 is inclined so as to be positioned in the x2 direction as it goes from the z2 direction to the z1 direction. In the present embodiment, the light emitting side inclined surface 318 is disposed in the x1 direction with respect to the light emitting side concave portion 311.

  The light emitting side metal layer 32 is formed on the light emitting side base material 31 and is a layer made of metal. The light emitting side metal layer 32 is composed of a single layer or a plurality of layers of, for example, a metal plating layer such as Cu, Ni, or Au. In the present embodiment, the light emitting side metal layer 32 includes a die bonding portion 321, a wire bonding portion 322, a main surface portion 324, a side surface portion 325, a reflecting portion 328, and a light emitting side mounting electrode 329.

  The die bonding part 321 is formed on the light emitting side support surface 312 of the light emitting side base material 31. The light emitting element 1 is bonded to the die bonding portion 321 via a conductive bonding material. The wire bonding portion 322 is formed on the light emitting side support surface 312 and is separated from the die bonding portion 321 in the y direction. The other end of the wire 19 is bonded to the wire bonding portion 322.

  The main surface portion 324 is formed on the light emitting side main surface 310. In the illustrated example, two main surface portions 324 are provided. One main surface portion 324 is electrically connected to the die bonding portion 321. The other main surface portion 324 is electrically connected to the wire bonding portion 322. The main surface portion 324 is formed from the light emitting side concave portion 311 to the edge of the light emitting side main surface 310 in the y direction.

  The side surface portion 325 is formed on the light emitting side surface 316 and the groove portion 317 of the light emitting side base material 31. More specifically, the side surface portion 325 covers the entire groove portion 317. In the illustrated example, two side surfaces 325 are provided. The two side surface portions 325 are connected to the two main surface portions 324, respectively.

  The light emitting side mounting electrode 329 is formed on the light emitting side mounting surface 315 of the light emitting side base material 31. In the illustrated example, two light emitting side mounting electrodes 329 are formed along both ends of the light emitting side mounting surface 315 in the y direction. The two light emitting side mounting electrodes 329 are connected to the two side surface portions 325. The two side surface portions 325 are parts joined to the mounting substrate 80 by solder when the light emitting and receiving device A1 is mounted on the mounting substrate 80.

  The reflection part 328 is formed on the light emitting side inclined surface 318 of the light emitting side base material 31. The surface of the reflection part 328 constitutes the reflection surface 51 of the optical path conversion means 5. The light receiving unit 21 of the light receiving element 2 is located in front of the reflecting surface 51 in the x1 direction.

  The light receiving element support 4 supports the light receiving element 2. The light receiving element support portion 4 of this embodiment includes a light receiving side base material 41 and a light receiving side metal layer 42.

  At least the surface layer of the light receiving side base material 41 is made of an insulating material. Examples of the material of the light receiving side substrate 41 include insulating resins such as silicone resin and epoxy resin, ceramics, and the like. In the illustrated example, a plurality of layers made of ceramics are stacked. The light receiving side base material 41 of the present embodiment has a light receiving side main surface 410, a light receiving side recess 411, a light receiving side support surface 412, and a light receiving side mounting surface 415.

  The light-receiving side main surface 410 is a surface facing the x2 direction. The light receiving side recess 411 is recessed from the light receiving side main surface 410 in the x1 direction. In the illustrated example, the light-receiving side recess 411 has a groove shape in which both ends in the y direction are open to the outside. The light receiving side recess 411 has a light receiving side support surface 412. The light receiving side support surface 412 is a surface facing the x2 direction, and supports the light receiving element 2. Thereby, in the present embodiment, the light receiving element 2 can receive the detection light L traveling in the x1 direction.

  The light receiving side mounting surface 415 faces the z2 direction, and is a surface facing the mounting substrate 80 in a state where the light emitting and receiving device A1 is mounted on the mounting substrate 80.

  The light-receiving side metal layer 42 is formed on the light-receiving side base material 41 and is a layer made of metal. The light-receiving side metal layer 42 is composed of a single layer or a plurality of layers of, for example, a metal plating layer such as Cu, Ni, or Au. In the present embodiment, the light-receiving side metal layer 42 is configured to appropriately include a part located on the outer surface of the light-receiving side base material 41 and a part located inside the light-receiving side base material 41. The light receiving side metal layer 42 includes a terminal portion 421 and a light receiving side mounting electrode 429.

  The terminal portion 421 is formed on the light receiving side support surface 412 of the light receiving side base material 41. In the illustrated example, six terminal portions 421 are arranged in the z direction. These terminal portions 421 are connected to the electrodes formed on the light receiving element 2 by wires 29.

  The light receiving side mounting electrode 429 is formed on the light receiving side mounting surface 415 of the light receiving side base material 41. In the illustrated example, six light emitting side mounting electrodes 329 are provided in a matrix on the light receiving side mounting surface 415. The six light emitting side mounting electrodes 329 are electrically connected to the six terminal portions 421 through, for example, a portion of the light receiving side metal layer 42 formed inside the light receiving side base material 41. The six light receiving side mounting electrodes 429 are portions that are joined to the mounting substrate 80 by solder when the light emitting and receiving device A1 is mounted on the mounting substrate 80.

  In the present embodiment, the light emitting element support part 3 and the light receiving element support part 4 are configured by separate members and are spaced apart from each other in the x direction.

  As shown in FIG. 1, as a configuration example of use of the light emitting / receiving device A1, a configuration in which the control IC 85 is mounted on a mounting board 80 can be cited. A plurality of wirings 83 are formed on the mounting substrate 80. One ends of the plurality of wirings 83 are joined to the two light emitting side mounting electrodes 329 of the light emitting element supporting portion 3 and the six light receiving side mounting electrodes 429 of the light receiving element supporting portion 4 by, for example, solder. The other ends of the plurality of wirings 83 are connected to the terminals of the control IC 85.

  The control IC 85 is for executing light emission control of the light emitting element 1 of the light receiving and emitting device A1 and control based on the light reception signal of the light receiving element 2. In the illustrated configuration example, the control IC 85 is arranged in the x1 direction with respect to the light emitting / receiving device A1. The position of the control IC 85 with respect to the light emitting / receiving device A1 is not particularly limited, and can be arranged in various directions including the x2 direction and the y direction with respect to the light emitting / receiving device A1. Further, the light receiving and emitting device A1 may be mounted on the control IC 85.

  Next, the operation of the light emitting / receiving device A1 will be described.

  According to the present embodiment, as shown in FIG. 2, the detection light L emitted from the light emitting element 1 travels in the z1 direction. The detection light L reflected by the detection target 89 travels in the z1 direction, and then travels in the x1 direction by being reflected by the reflecting surface 51 of the optical path changing unit 5. The detection light L is received by the light receiving element 2. For this reason, the x-direction distance between the detection light L traveling in the z1 direction toward the detection target 89 and the detection light L traveling in the z2 direction reflected by the detection target 89 is the light emitting element 1 and the reflection surface 51. X direction distance, which is smaller than the x direction distance between the light emitting element 1 and the light receiving element 2. Thereby, it is possible to reduce the opening area of the opening part 82 provided in the housing | casing 81 of the electronic device in which the light emitting / receiving apparatus A1 is mounted, and size reduction of an electronic device can be achieved. It should be noted that the opening 82 may be a part that can pass or transmit the detection light L. The opening 82 may be, for example, a through hole provided in the housing 81 or may be configured such that the through hole is closed by a member made of a material that transmits the detection light L.

  By arranging the light emitting element 1 and the reflecting surface 51 in the x direction, the light emitting and receiving device A1 can be reduced in size in the y direction. This is suitable for reducing the area of the mounting substrate 80 that the light emitting and receiving device A1 occupies in the y direction.

  The light receiving element 2 is supported on the light receiving side support surface 412 of the light receiving side base material 41. Since the light-receiving side support surface 412 faces the x2 direction, the light-receiving element 2 is in an upright posture in the z direction. For this reason, it is possible to reduce the area occupied by the light receiving element 2 in the x direction, and the light receiving and emitting device A1 can be reduced in size in the x direction.

  By configuring the light emitting element support 3 and the light receiving element support 4 by separate members, the light emitting element support 3 and the light receiving element support 4 can be arranged at desired positions. Thereby, for example, the distance in the x direction between the light emitting element 1 and the light receiving element 2 can be appropriately adjusted according to the electronic device on which the light receiving and emitting device A1 is mounted.

  Further, according to the light receiving and emitting device A1, it is possible to bring the detection light L traveling in the z1 direction close to the detection light L reflected by the detection target 89 and traveling in the z2 direction. Thereby, the detection target 89 can be detected more reliably, and the detection accuracy can be improved.

  6 to 18 show another embodiment of the present invention. In these drawings, the same or similar elements as those in the above embodiment are denoted by the same reference numerals as those in the above embodiment.

  6 and 7 show a light emitting / receiving device according to the second embodiment of the present invention. FIG. 6 is a plan view showing the light emitting / receiving device A2 of the present embodiment. 7 is a cross-sectional view taken along line VII-VII in FIG.

  In the light emitting / receiving device A2, the light emitting element support 3 and the light receiving element support 4 are configured as an integral member. Specifically, the light emitting side substrate 31 of the light emitting element support 3 and the light receiving side substrate 41 of the light receiving element support 4 are configured by a single member. In such a configuration, the light emitting side base material 31 and the light receiving side base material 41 are preferably made of, for example, an insulating resin. The light emitting side metal layer 32 and the light receiving side metal layer 42 are formed by the same plating process. As another example in which the light emitting element support part 3 and the light receiving element support part 4 are configured as an integral member, an example using a lead frame or a flexible wiring board can be given. In these examples, the specific structure is different from the configuration including the light emitting side base material 31 and the light receiving side base material 41, the light emitting side metal layer 32 and the light receiving side metal layer 42.

  Also according to such an embodiment, it is possible to reduce the size of the electronic device in which the light emitting and receiving device A2 is mounted. Further, since the light emitting element support 3 and the light receiving element support 4 are configured as an integral member, the light emitting side support surface 312 that supports the light emitting element 1, the light emitting side inclined surface 318 that supports the reflecting surface 51, and The positional relationship of the light receiving side support surface 412 that supports the light receiving element 2 can be set more accurately. This is preferable for improving the detection accuracy of the light emitting / receiving device A2.

  8 to 10 show modifications of the light emitting / receiving device A2. FIG. 8 is a plan view showing a light emitting / receiving device A2 according to this modification. 9 is a cross-sectional view taken along line IX-IX in FIG. 10 is a cross-sectional view taken along line XX of FIG. In this modification, the light emitting element 1 (light emitting side recess 311) and the reflecting surface 51 (light emitting side inclined surface 318) are provided side by side in the y direction. Also according to such a modification, it is possible to reduce the size of the electronic device on which the light emitting / receiving device A2 is mounted. In particular, it is suitable for reducing the dimension in the x direction of the light emitting / receiving device A2. The configuration of this modification can also be applied to the light receiving and emitting device A1 described above.

  11 and 12 show a light receiving and emitting device according to the third embodiment of the present invention. FIG. 11 is a plan view showing the light emitting / receiving device A3 of the present embodiment. 12 is a cross-sectional view taken along line XII-XII in FIG.

  In the present embodiment, the optical path changing means 5 is configured as an optical component called a so-called beam splitter. The reflection surface 51 of the optical path changing unit 5 transmits the detection light L traveling in the z1 direction and reflects the detection light L traveling in the z2 direction in the x1 direction.

  The optical path changing means 5 is disposed in front of the light emitting element 1 in the z1 direction. In the illustrated example, the optical path changing means 5 is bonded to the light emission side main surface 310 of the light emission side base material 31 and covers the light emission side recess 311 of the light emission side base material 31.

  The light receiving element 2 is disposed in front of the reflecting surface 51 of the optical path changing means 5 in the x1 direction. In the present embodiment, the light emitting element support 3 and the light receiving element support 4 are configured by separate members.

  As shown in FIG. 12, the detection light L emitted from the light emitting element 1 passes through the optical path changing means 5 and travels in the z1 direction. The detection light L reflected by the detection object 89 travels in the z2 direction, and then is reflected by the reflecting surface 51 and travels in the x1 direction. This detection light L is received by the light receiving element 2.

  Also according to the present embodiment, it is possible to reduce the size of an electronic device in which the light emitting / receiving device A3 is mounted. Further, it is possible to overlap the light emitting element 1 and the optical path changing means 5 in the z-direction view. Thereby, the z direction view dimension of the light emitting / receiving device A3 can be reduced. Further, the detection light L traveling in the z1 direction toward the detection target 89 and the detection light L traveling in the z2 direction after being reflected by the detection target 89 are caused to overlap each other when viewed in the z direction. Is possible. Thereby, the opening part 82 of the housing | casing 81 can be further reduced in size.

  FIG. 13 is a sectional view showing a light emitting / receiving device A4 according to the fourth embodiment of the present invention. The light emitting / receiving device A4 has the same configuration as that of the light receiving / emitting device A3 except that the light emitting element supporting portion 3 and the light receiving element supporting portion 4 are configured as an integral member. ing.

  Also according to the present embodiment, it is possible to reduce the size of an electronic device on which the light emitting / receiving device A4 is mounted.

  14 and 15 show a light emitting / receiving device according to the fifth embodiment of the present invention. FIG. 14 is a plan view showing A5 of this embodiment. 15 is a cross-sectional view taken along line XV-XV in FIG.

  The light emitting side substrate 31 of the light emitting element support 3 has a light emitting side main surface 310, a light emitting side recess 311, and a light emitting side mounting surface 315. The light emitting side main surface 310 is a surface facing the x1 direction. The light emitting side recess 311 is recessed in the x2 direction from the light emitting side main surface 310. The light emission side support surface 312 of the light emission side recessed part 311 has faced x1 direction.

  A die bonding portion 321 is formed on the light emitting side support surface 312. The light emitting element 1 is bonded to the die bonding part 321. Thereby, the detection light L emitted from the light emitting element 1 travels in the x1 direction.

  The light receiving side support 41 of the light receiving element support 4 has a light receiving side support surface 412, a light receiving side mounting surface 415, and a light receiving side inclined surface 418.

  The light receiving side support surface 412 is a surface facing the z1 direction. The light receiving element 2 designated by the light receiving side support surface 412 receives light traveling in the z2 direction. Further, in the present embodiment, the light receiving element 2 is provided at a position shifted in the y direction with respect to the light emitting element 1 when viewed in the z direction.

  The light-receiving side inclined surface 418 is located in front of the light emitting element 1 in the x1 direction, and the position in the z direction is substantially the same as that of the light emitting element 1. The light-receiving side inclined surface 418 is inclined with respect to the z direction and the x direction so as to be positioned in the x1 direction from the z2 direction toward the z1 direction.

  The light receiving side metal layer 42 has a reflecting portion 428. The reflection portion 428 is formed on the light receiving side inclined surface 418 of the light receiving side base material 41. In the present embodiment, the reflection surface 51 of the optical path changing means 5 is constituted by the surface of the reflection portion 428.

  In the present embodiment, the detection light L emitted from the light emitting element 1 travels in the x1 direction, and then travels in the z1 direction by the reflecting surface 51 provided on the light receiving element support 4. When the detection light L is reflected by the detection target 89, the detection light L is received by the light receiving element 2 after traveling in the z2 direction.

  Also according to the present embodiment, it is possible to reduce the size of the electronic device on which the light emitting / receiving device A5 is mounted.

  FIG. 16 is a sectional view showing a light receiving and emitting device according to the sixth embodiment of the present invention. The light receiving / emitting device A6 has the same configuration as the light receiving / emitting device A3 except that the light emitting element supporting portion 3 and the light receiving element supporting portion 4 are configured as an integral member, except that the light receiving / emitting device A6 is different from the light receiving / emitting device A5 described above. ing.

  Also according to the present embodiment, it is possible to reduce the size of the electronic device in which the light emitting / receiving device A6 is mounted.

  FIG. 17: is sectional drawing which shows the light emitting / receiving apparatus A7 based on 17th Embodiment of this invention. The configurations of the light emitting element 1 and the light emitting element support 3 in the light emitting / receiving device A7 are the same as those of the light emitting / receiving device A5 and the light emitting / receiving device A6 described above.

  In the present embodiment, the optical path changing means 5 is configured as a beam splitter of the same type as the optical path changing means 5 in the light receiving / emitting device A3 and the light receiving / emitting device A4 described above. The reflection surface 51 of the optical path changing means 5 of the present embodiment reflects the detection light L traveling in the x1 direction, transmits the detection light L traveling in the z1 direction, and transmits the detection light L traveling in the z2 direction.

  The light receiving side support surface 412 of the light receiving side base material 41 faces the z1 direction and supports the light receiving element 2. The optical path changing means 5 is arranged in front of the light receiving element 2 in the z1 direction.

  In the present embodiment, the detection light L emitted from the light emitting element 1 travels in the z1 direction by being reflected by the reflecting surface 51 after traveling in the x1 direction. The detection light L reflected by the detection object 89 travels in the z2 direction, passes through the reflection surface 51, and is received by the light receiving element 2.

  Also according to the present embodiment, it is possible to reduce the size of an electronic device in which the light emitting / receiving device A7 is mounted.

  FIG. 18 is a cross-sectional view showing a light emitting / receiving device according to the eighth embodiment of the present invention. The light receiving / emitting device A8 has the same configuration as the light receiving / emitting device A7, except that the light emitting element support 3 and the light receiving element support 4 are configured as an integral member. ing.

  Also according to the present embodiment, it is possible to reduce the size of an electronic device in which the light emitting / receiving device A8 is mounted.

  The light emitting / receiving device according to the present invention is not limited to the above-described embodiment. The specific configuration of each part of the light emitting and receiving device according to the present invention can be varied in design in various ways.

A1 to A8: Light emitting / receiving device 1: Light emitting element 2: Light receiving element 3: Light emitting element support part 4: Light receiving element support part 5: Optical path changing means 19: Wire 21: Light receiving part 29: Wire 31: Light emitting side base material 32: Light emitting side metal layer 41: Light receiving side base material 42: Light receiving side metal layer 51: Reflecting surface 80: Mounting substrate 81: Housing 82: Opening 83: Wiring 85: Control IC
89: Detection object 310: Light emission side main surface 311: Light emission side recess 312: Light emission side support surface 313: Light emission side recess side surface 315: Light emission side mounting surface 316: Light emission side surface 317: Groove portion 318: Light emission side inclined surface 321: Die bonding portion 322: Wire bonding portion 324: Main surface portion 325: Side surface portion 328: Reflection portion 329: Light emitting side mounting electrode 410: Light receiving side main surface 411: Light receiving side concave portion 412: Light receiving side support surface 415: Light receiving side mounting surface 418 : Light receiving side inclined surface 421: Terminal portion 428: Reflecting portion 429: Light receiving side mounting electrode L: Detection light

Claims (23)

A light emitting element emitting detection light;
A light receiving and emitting device comprising: a light receiving element that receives the detection light after traveling toward the other side in the first direction by being emitted to the one side in the first direction and reflected by the detection target;
Reflecting the detection light traveling in the other side of the first direction in a second direction intersecting the first direction to travel to the light receiving element, or from the light emitting element toward the second direction A light emitting and receiving device comprising: an optical path changing unit having a reflecting surface that reflects the detection light and travels to one side in the first direction. A light emitting element support for supporting the light emitting element;
2. The light receiving and emitting device according to claim 1, further comprising: a light receiving element supporting portion that is located on one side in the second direction with respect to the light emitting element supporting portion and supports the light receiving element.   The light emitting and receiving device according to claim 2, wherein the light emitting element support part and the light receiving element support part are configured by separate members.   The light emitting and receiving device according to claim 2, wherein the light emitting element support and the light receiving element support are configured as an integral member. The light emitting element support portion has a light emitting side support surface that faces the one side in the first direction and supports the light emitting element,
5. The light receiving and emitting device according to claim 2, wherein the light receiving element support portion has a light receiving side support surface that faces the other side in the second direction and supports the light receiving element.   The light emitting / receiving device according to claim 5, wherein the reflection surface of the optical path changing unit is formed on the light emitting element support. The reflecting surface is located between the light emitting element and the light receiving element in the first direction;
The light emitting / receiving device according to claim 6, wherein the light emitting element, the reflecting surface, and the light receiving element are arranged in the first direction.   The light emitting and receiving device according to claim 6, wherein the reflecting surface is aligned with the light emitting element in a third direction that is perpendicular to both the first direction and the second direction. The optical path changing means is located on one side in the first direction with respect to the light emitting element and overlaps with the light emitting element in the first direction view,
The said reflective surface permeate | transmits the said detection light which progresses to the said 1st direction one side, and reflects the said detection light which advances to the said 1st direction other side to the said 2nd direction one side. Light emitting / receiving device.   The light emitting element support portion has a light emitting side main surface facing the one side in the first direction and a light emitting side concave portion recessed from the light emitting side main surface to the other side in the first direction and having the light emitting side support surface as a bottom surface. The light emitting / receiving device according to claim 6.   The light emitting / receiving device according to claim 10, wherein the light emitting side concave portion has a light emitting side concave side surface that connects the light emitting side main surface and the light emitting side support surface.   The light emitting / receiving device according to claim 11, wherein the light emitting side recess side surface is inclined with respect to the first direction. The light emitting element support portion has a light emitting side support surface facing the one side in the second direction and supporting the light emitting element,
5. The light receiving and emitting device according to claim 2, wherein the light receiving element support portion has a light receiving side support surface facing the one side in the first direction and supporting the light receiving element.   The light receiving and emitting device according to claim 13, wherein the reflection surface of the optical path changing unit is formed on the light receiving element support.   The light receiving and emitting device according to claim 14, wherein the reflecting surface is aligned with the light receiving element in a third direction that is perpendicular to both the first direction and the second direction. The optical path changing means is located on the one side in the first direction with respect to the light receiving element and overlaps the light receiving element in the first direction view,
14. The reflection surface according to claim 13, wherein the reflection surface transmits the detection light traveling toward the other side in the first direction and reflects the detection light traveling toward the one side in the second direction to the one side in the first direction. Light emitting / receiving device.   The light emitting element support portion has a light emitting side main surface facing the one side in the second direction and a light emitting side concave portion recessed from the light emitting side main surface to the other side in the second direction and having the light emitting side support surface as a bottom surface. The light emitting / receiving device according to claim 14.   The light emitting / receiving device according to claim 17, wherein the light emitting side concave portion has a light emitting side concave side surface that connects the light emitting side main surface and the light emitting side support surface.   The light emitting and receiving device according to claim 18, wherein the light emitting side concave side surface is inclined with respect to the second direction.   The light emitting / receiving device according to claim 2, wherein the light emitting element support portion has a light emitting side mounting surface facing the other side in the first direction.   The light emitting / receiving device according to claim 20, wherein the light emitting element support portion includes a light emitting side mounting electrode formed on the light emitting side mounting surface.   The light receiving / emitting device according to claim 20 or 21, wherein the light receiving element support has a light receiving side mounting surface facing the other side in the first direction.   The light receiving / emitting device according to claim 22, wherein the light receiving element support portion includes a light receiving side mounting electrode formed on the light receiving side mounting surface.

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