Biological detection device

Abstract

To provide a biodetection device that achieves high accuracy and miniaturization. [Solution] The biological detection device (1) comprises a light-emitting unit (3), a first reflecting unit (41), a light-receiving unit (5), a first substrate (22), and a detection unit (72). The light-emitting unit emits a first light (81). The first reflecting unit reflects the first light in a first direction (+Z direction). When the biological organism to be detected (9) is in a first direction as viewed from the first reflecting unit, the light-receiving unit receives the second light (82) that has been reflected by the biological organism to be detected. The first substrate (22) is positioned between the light-emitting unit and the light-receiving unit and blocks the first light. The detection unit detects biological information of the biological organism to be detected based on the second light. In a plan view as seen from the biological organism to be detected, the light-emitting unit is positioned between the light-receiving unit and the first reflecting unit. The light-emitting unit irradiates the first light toward the first reflecting unit.

Description

Technical Field

[0001] The present invention relates to a biological detection device, and for example, it can be suitably used for detecting biological information using light.

Background Art

[0002] Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2009-106373) discloses a sensing device for a living body surface layer tissue. The sensing device for a living body surface layer tissue in Patent Document 1 irradiates light emitted from an end surface light emitting type light emitting means that emits light over the entire circumference of the end surface portion onto the living body surface layer tissue, and receives the diffusely reflected light from the living body surface layer tissue with a surface incident type light receiving element. The light receiving element is laminated on the light emitting means.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the configuration of the sensing device for a living body surface layer tissue according to Patent Document 1, in order to provide a plurality of light emitting means that emit light of a plurality of colors respectively, it is necessary to laminate the plurality of light emitting means under the light receiving means. Therefore, further miniaturization of the sensing device for a living body surface layer tissue as a whole is not possible.

[0005] In view of the above situation, one of the objects of the present disclosure is to provide a biological detection device that realizes high precision and miniaturization. Other problems and novel features will become apparent from the description of this specification and the accompanying drawings.

Means for Solving the Problems

[0006] The means for solving the problem are described below using the numbers and symbols used in the embodiments for carrying out the invention. These numbers and symbols are added in parentheses for reference to show an example of the correspondence between the claims and the embodiments for carrying out the invention. Therefore, the claims should not be interpreted restrictively because of the parenthetical statements.

[0007] According to one embodiment, the biological detection device (1) comprises a light-emitting unit (3), a first reflecting unit (41), a light-receiving unit (5), a first substrate (22), and a detection unit (72). The light-emitting unit (3) emits a first light (81). The first reflecting unit (41) reflects the first light (81) in a first direction (+Z direction). The light-receiving unit (5) receives the second light (82) that has been reflected by the biological organism (9) to be detected when the biological organism (9) to be detected is in the first direction (+Z direction) as viewed from the first reflecting unit (41). The first substrate (22) is positioned between the light-emitting unit (3) and the light-receiving unit (5) and blocks the first light (81). The detection unit (72) detects biological information of the biological organism (9) to be detected based on the second light (82). In a plan view from the target organism (9), the light-emitting unit (3) is positioned between the light-receiving unit (5) and the first reflecting unit (41). The light-emitting unit (3) irradiates the first light (81) toward the first reflecting unit (41). [Effects of the Invention]

[0008] According to one embodiment, in a biological detection device, the accuracy can be improved and the device can be miniaturized by suppressing the direct arrival of emitted light from the light-emitting unit to the light-receiving unit. [Brief explanation of the drawing]

[0009] [Figure 1] This is a cross-sectional view of one example configuration of a biological detection device according to the first embodiment, as seen from a first direction. [Figure 2] Figure 1 shows an example configuration of the biodetection device, viewed from a plan view from a second direction perpendicular to the first direction. [Figure 3]This is a schematic block circuit diagram showing an example of the electrical connection relationships in a biodetector according to the first embodiment. [Figure 4] This is a cross-sectional view of one example configuration of a biodetection device according to the second embodiment, as seen from the first direction. [Figure 5] Figure 4 shows an example configuration of the biodetection device, viewed from a plan view from a second direction perpendicular to the first direction. [Figure 6] This is a cross-sectional view of one example configuration of a biodetection device according to the third embodiment, as seen from the first direction. [Figure 7] Figure 6 shows an example configuration of the biodetection device, viewed from a plan view from a second direction perpendicular to the first direction. [Figure 8] This is a schematic block circuit diagram showing an example of the electrical connection relationships in a biodetector according to the third embodiment. [Modes for carrying out the invention]

[0010] Referring to the attached drawings, the embodiments for implementing the biological detection device according to this disclosure are described below.

[0011] [First Embodiment] Figure 1 is a cross-sectional view of one configuration example of the biodetection device 1 according to the first embodiment, viewed from the first direction (Y direction). Figure 2 is a plan view of one configuration example of the biodetection device 1 shown in Figure 1, viewed from the second direction (Z direction) perpendicular to the first direction. As shown in Figures 1 and 2, the biodetection device 1 according to one embodiment comprises a first substrate 21 and a first unit 11, a second unit 12, and a third unit 13 mounted on the mounting surface 21a of the first substrate 21. In Figures 1 and 2, the dashed frames representing the first unit 11, the second unit 12, and the third unit 13, respectively, have been expanded for clarity and therefore partially overlap, but the components included in each of the first unit 11, the second unit 12, and the third unit 13 are as follows. The biodetection device 1 is a device that detects biological information of a target organism 9 by optical and non-invasive methods. Examples of the target organism 9 include humans and animals. Examples of biological information include pulse rate and blood oxygen saturation (blood oxygen concentration). The biological detection device 1 is, for example, a PPG (Photoplethysmography) sensor and is incorporated into vital signs equipment.

[0012] The first unit 11 comprises a second substrate 22, a light-emitting unit 3 mounted on the first mounting surface 22a of the second substrate 22, and a protective unit 30 for protecting the light-emitting unit 3. The light-emitting unit 3 comprises a first light-emitting unit 31 that emits first-color emitted light 811, a second light-emitting unit 32 that emits second-color emitted light 812, and a third light-emitting unit 33 that emits third-color emitted light 813. The first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 may be LEDs (Light Emitting Diodes), OLEDs (Organic Light Emitting Diodes), microLEDs, or VCSELs (Vertical Cavity Surface Emitting Lasers). Each of the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 may emit the emitted light 811, 812, and 813 by surface emission.

[0013] For example, the first color of the first emitted light 811 is green, which is suitable for measuring pulse rate, and its wavelength may be in the band of approximately 520 nm (nanometers). The second color of the second emitted light 812 and the third color of the third emitted light 813 are red and infrared, which are suitable for measuring blood oxygen saturation, and their respective wavelengths may be in the bands of 660 nm and 905 nm. Hereafter, when the first emitted light 811, the second emitted light 812, and the third emitted light 813 are not distinguished, these emitted lights 811, 812, and 813 may be collectively referred to as emitted light 81.

[0014] The second substrate 22 is positioned to extend in a second plane direction (YZ direction) that intersects the first plane direction (XY direction) on which the first substrate 21 extends. For example, the second substrate 22 is positioned such that its first mounting surface 22a extends in a second plane direction (YZ direction) that is perpendicular to the first plane direction (XY direction) on which the mounting surface 21a of the first substrate 21 extends. For example, the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 emit first emitted light 811, second emitted light 812, and third emitted light 813, respectively, in a third direction (+X direction) perpendicular to the first mounting surface 22a of the second substrate 22 on which the first light-emitting unit 31, second light-emitting unit 32, and third light-emitting unit 33 are mounted. However, the emission direction from which the first emitted light 811, the second emitted light 812, and the third emitted light 813 are emitted may be included in a predetermined angular range that includes the third direction.

[0015] The protective portion 30 may be made of a transparent resin or the like so as not to obstruct the propagation of the emitted light 81. The surface 30a of the protective portion 30 is preferably in close contact with the surface of the protective portion 412 of the second unit 12 so as not to obstruct the propagation of the emitted light 81. The end face 30b of the protective portion 30 is preferably flush with the end face 22b of the second substrate 22.

[0016] The second unit 12 includes a first reflecting portion 41 that reflects the emitted light 81 from the light emitting portion 3 in a desired direction, a first supporting portion 411 that supports the first reflecting portion 41, and a protecting portion 412 that protects the surface of the first reflecting portion 41. However, in FIG. 2, the first supporting portion 411 is hidden by the first reflecting portion 41, and the protecting portion 412 is not shown. The first reflecting portion 41 reflects the emitted light 81 emitted by the light emitting portion 3 toward the first reflecting portion 41 in the third direction (+X direction) in the second direction (+Z direction) where the detected target living body 9 is expected to exist as viewed from the biological detection device 1. The first reflecting portion 41 may be a mirror or a metal plate disposed on the inclined surface 411a of the first supporting portion 411, or may be a reflective layer formed on the inclined surface 411a of the first supporting portion 411 by a method such as photolithography, electron beam lithography, or nanoimprinting.

[0017] The reflectivity of the first reflecting portion 41 for reflecting the emitted light 81 is preferably 100%, but this value of the reflectivity is merely an example and does not limit the present disclosure. In the example of FIG. 1, the emission direction (+X direction) in which the light emitting portion 3 emits the emitted light 81 and the propagation direction (+Z direction) of the emitted light 81 reflected by the first reflecting portion 41 are orthogonal. In such a case, the angle between the reflecting surface of the first reflecting portion 41 and the emission direction (+X direction) of the emitted light 81 from the light emitting portion 3 may be 45 degrees. However, this value of the angle is merely an example and does not limit the present disclosure, and may be appropriately determined based on the expected position of the detected target living body 9 with respect to the biological detection device 1.

[0018] The first supporting portion 411 has an inclined surface 411a that supports the first reflecting portion 41 and a bottom surface 411b that contacts the mounting surface 21a of the first substrate 21. The first supporting portion 411 may be formed of, for example, black resin so as to absorb the emitted light 81 that has passed through the first reflecting portion 41 when a part of the emitted light 81 passes through the first reflecting portion 41. Further, the first supporting portion 411 may include a cavity inside.

[0019] The protection part 412 protects the surface of the first reflection part 41 on the side opposite to the first support part 411. As an example, the protection part 412 may be formed of a transparent resin or the like so as not to obstruct the propagation of the emitted light 81. The surface 412a of the protection part 412 closest to the detected object living body 9, that is, the surface 412a farthest from the first substrate 21, is preferably flush with the end face 30b of the protection part 30 of the first unit 11.

[0020] The third unit 13 includes a third substrate 23, a light receiving part 5 mounted on the mounting surface 231 of the third substrate 23, a protection part 50 that protects the surface of the light receiving part 5, and a light shielding wall 24. The light receiving part 5 receives the light that has passed between the second substrate 22 and the light shielding wall 24 among the reflected light 82 obtained by reflecting the emitted light 81 from the surface or inside of the detected object living body 9. More specifically, the light receiving part 5 receives the first reflected light 821, the second reflected light 822, and the third reflected light 823 obtained by reflecting the first emitted light 811, the second emitted light 812, and the third emitted light 813 included in the emitted light 81 from the surface of the detected object living body 9, respectively.

[0021] The second substrate 22 and the light shielding wall 24 are arranged so as to suppress the arrival of noise light other than the reflected light 82 at the light receiving part 5. The noise light includes the light that has not been reflected from the surface of the detected object living body 9 among the emitted light 81 emitted by the light emitting part 3, and the light that has been further reflected from the surface other than the detected object living body 9 among the reflected light 82 obtained by reflecting the emitted light 81 from the surface of the detected object living body 9. In order to suppress the arrival of the emitted light 81 that does not pass through the detected object living body 9 at the light receiving part 5, the direction (+X direction) in which the light emitting part 3 emits the emitted light 81 is preferably opposite to the direction (-X direction) in which the third unit 13 including the light receiving part 5 is arranged when viewed from the first unit 11 including the light emitting part 3. The second substrate 22 is arranged between the light emitting part 3 and the light receiving part 5, and the light emitting part 3 is arranged between the first reflection part 41 and the light receiving part 5. The light shielding wall 24 may be formed of a highly reflective resin such as white resin or a metal plate.

[0022] The protective portion 50 protects the surface of the light-receiving portion 5 opposite to the third substrate 23. For example, the protective portion 50 may be made of a transparent resin or the like so as not to obstruct the propagation of reflected light 82. The surface 50a of the protective portion 50 closest to the biological tissue 9 to be detected, that is, the surface 50a furthest from the mounting surface 21a of the first substrate 21, may be flush with the end face 22b of the second substrate 22 closest to the biological tissue 9 to be detected. Here, it is preferable that the thickness of the protective portion 50 be thin so that the reflected light 82 from the biological tissue 9 to be detected is easily received by the light-receiving portion 5. However, when there is a bonding wire connecting the light-receiving portion 5 and the third substrate 23, it is preferable that the protective portion 50 has a thickness that can fix and protect the bonding wire.

[0023] For example, the first unit 11, the second unit 12, and the third unit 13 may each be manufactured independently of each other and then bonded to the mounting surface 21a of the first substrate 21. By manufacturing the biodetection device 1 according to this disclosure in this manner, it is expected that the difficulty of manufacturing will be reduced, the manufacturing yield will be improved, and the manufacturing cost will be reduced.

[0024] As shown in Figure 3, a biological detection device 1 according to one embodiment further comprises a control unit 71 that controls the operation of the light-emitting unit 3 and the light-receiving unit 5, and a detection unit 72 that detects biological information of the biological body to be detected 9 based on the reflected light 82 received by the light-receiving unit 5. The control unit 71 and the detection unit 72 may each be a functional block that realizes a desired process by having a so-called computer's arithmetic unit and memory device work together to execute a predetermined program, or they may be electronic circuits that are implemented in a large-scale integrated circuit or the like to realize a desired process.

[0025] The control unit 71 is electrically connected to the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 included in the light-emitting unit 3, and to the light-receiving unit 5. The electrical connection between the control unit 71 and the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 may be achieved by wiring provided on the first substrate 21 and / or the second substrate 22, or by bonding wires provided between the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 and the second substrate 22.

[0026] The electrical connection between the control unit 71 and the light-receiving unit 5 may be achieved by wiring provided on the first substrate 21 and / or the third substrate 23, or by bonding wires provided between the light-receiving unit 5 and the third substrate 23. Similarly, the electrical connection between the detection unit 72 and the light-receiving unit 5 may be achieved by wiring provided on the first substrate 21 and / or the third substrate 23, or by bonding wires provided between the light-receiving unit 5 and the third substrate 23.

[0027] The control unit 71 controls the operation of the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33, and the light-receiving unit 5, respectively, using electrical control signals. The control unit 71 may operate only some of the first light-emitting unit 31, the second light-emitting unit 32, the third light-emitting unit 33, and the light-receiving unit 5 at one time, or it may operate all of them at one time. The detection unit 72 may operate continuously, or it may operate only when the light-receiving unit 5 is operating. Switching between the operating and non-operating states of the detection unit 72 may be performed under the control of the control unit 71.

[0028] As an example, in the first state for measuring pulse rate, the control unit 71 controls the first light-emitting unit 31 and the detection unit 72 to be in an operating state, and the second light-emitting unit 32 and the third light-emitting unit 33 to be in an inoperable state. At this time, the light-receiving unit 5 receives the first reflected light 821 originating from the first emitted light 811 emitted by the first light-emitting unit 31. Here, the light-receiving unit 5 does not receive the second reflected light 822 and the third reflected light 823, which would be noise when receiving the first reflected light 821, so the detection unit 72 can accurately detect the biological information of the organism being detected 9, that is, it can accurately measure the pulse rate.

[0029] Similarly, in the second state for measuring blood oxygen saturation, the control unit 71 controls the second light-emitting unit 32, the third light-emitting unit 33, and the detection unit 72 to be in operation, and the first light-emitting unit 31 to be inoperable. At this time, the light-receiving unit 5 receives the second reflected light 822 and the third reflected light 823 originating from the second emitted light 812 and the third emitted light 813 emitted by the second light-emitting unit 32 and the third light-emitting unit 33. Here, the light-receiving unit 5 does not receive the first reflected light 821, which would be noise when receiving the second reflected light 822 and the third reflected light 823, so the detection unit 72 can accurately detect the biological information of the organism to be detected 9, that is, it can accurately measure blood oxygen saturation.

[0030] Furthermore, by controlling the multiple light-emitting units 31, 32, and 33 to operate in a time-division manner, the power consumption of the biological detection device 1 according to this disclosure can be reduced.

[0031] An example of the operation of the biological detection device 1 according to one embodiment will be described. First, the control unit 71 generates a control signal and transmits it to the light-emitting unit 3. At this time, the control unit 71 may also generate a first control signal, a second control signal, and a third control signal to control the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33, respectively, and transmit them to the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33, respectively.

[0032] The light-emitting unit 3 generates and emits first light 81 in response to the received control signal. More specifically, the first light-emitting unit 31 emits first light 811 in response to the first control signal, the second light-emitting unit 32 emits second light 812 in response to the second control signal, and the third light-emitting unit 33 emits third light 813 in response to the third control signal. Here, at any given time, only the first light-emitting unit 31, the second light-emitting unit 32, and a portion of the third light-emitting unit 33 may emit light 81.

[0033] The light 81 emitted from the light-emitting unit 3 passes through the protective unit 30 of the first unit 11 and the protective unit 412 of the second unit 12, is reflected by the reflecting unit 41, and is emitted from the surface 412a of the protective unit 412 to the outside of the biological detection device 1. When there is no biological organism 9 to be detected at the destination of the emitted light 81, the light-receiving unit 5 does not receive light, and the detection unit 72 does not detect biological information of the biological organism 9. When there is a biological organism 9 to be detected at the destination of the emitted light 81, the emitted light 81 is reflected from the surface or inside the biological organism 9. The emitted light 81 reflected from the surface or inside the biological organism 9 is hereafter referred to as reflected light 82. When the emitted light 81 includes the first emitted light 811, the reflected light 82 includes the first reflected light 821. Similarly, when the emitted light 81 includes the second emitted light 812, the reflected light 82 includes the second reflected light 822, and when the emitted light 81 includes the third emitted light 813, the reflected light 82 includes the third reflected light 823. At least a portion of the reflected light 82 is incident on the protective part 50 of the third unit 13. The light receiving unit 5 receives at least a portion of the reflected light 82 that has been incident on the protective part 50.

[0034] The light receiving unit 5 generates an electrical signal corresponding to the characteristics of the reflected light 82 it receives and transmits it to the detection unit 72. The detection unit 72 detects biological information of the organism to be detected 9 based on the received electrical signal. More specifically, when the reflected light 82 received by the light receiving unit 5 includes a first reflected light 821 derived from the first emitted light 811, the detection unit 72 may measure the pulse rate of the organism to be detected 9 based on the received electrical signal. Also, when the reflected light 82 received by the light receiving unit 5 includes a second reflected light 822 and / or a third reflected light 823 derived from the second emitted light 812 and / or the third emitted light 813, the detection unit 72 may measure the blood oxygen saturation concentration of the organism to be detected 9 based on the received electrical signal.

[0035] As described above, unlike the case of prior art 1 (Japanese Patent Publication No. 2009-106373), the biological detection device 1 according to one embodiment does not require stacking multiple light-emitting units 31, 32, and 33 that emit light 811, 812, and 813 with different wavelengths in the thickness direction (Z direction), thus enabling miniaturization. Furthermore, since the second substrate 22 on which the light-emitting unit 3 is mounted suppresses the direct arrival of the emitted light 81 at the light-receiving unit 5, noise light at the light-receiving unit 5 is reduced compared to the configuration of prior art 1, and biological information of the biological organism 9 to be detected can be detected with greater accuracy.

[0036] [Second Embodiment] Figure 4 is a cross-sectional view of one example configuration of the biodetector 1 according to the second embodiment, viewed from the first direction (Y direction). Figure 5 is a plan view of one example configuration of the biodetector 1 shown in Figure 4, viewed from the second direction (Z direction) perpendicular to the first direction. As shown in Figures 4 and 5, the biodetector 1 according to the second embodiment can be obtained by making the following changes to the biodetector 1 according to the first embodiment. Note that detailed explanations of parts of the second embodiment that are common with the first embodiment may be omitted.

[0037] In the first unit 11, the light-receiving unit 5 is mounted on the second mounting surface 22c of the second substrate 22, which is opposite to the first mounting surface 22a. Here, the planar direction (YZ direction) in which the second mounting surface 22c of the second substrate 22 extends is perpendicular to the emission direction (+X direction) in which the light-emitting unit 3 emits emitted light 81, and the light-receiving unit 5 receives reflected light 82 propagating from the opposite direction (-X direction) to the emission direction (+X direction).

[0038] In the first unit 11, the light-receiving unit 5 is protected by a protective unit 50 made of a transparent resin or the like. Here, the surfaces of the light-receiving unit 5 other than the surface facing the second substrate 22 may be covered by the protective unit 50. Preferably, the end face 50b of the protective unit 50 closest to the biological tissue 9 to be detected, that is, the end face 50b furthest from the first substrate 21, is flush with the end face 22b of the second substrate 22.

[0039] The configuration of the first substrate 21 and the second unit 12 according to the second embodiment is the same as in the first embodiment.

[0040] The third unit 13 according to the second embodiment, like the first unit 11 according to the first embodiment, includes a second reflecting portion 42, a second support portion 421 that supports the second reflecting portion 42, and a protective portion 422 that protects the surface of the second reflecting portion 42. However, the second reflecting portion 42 reflects the reflected light 82 from the biological organism 9 to be detected toward the light receiving portion 5. In the example in Figure 4, the direction in which the reflected light 82 from the biological organism 9 propagates (-Z direction) and the direction in which the reflected light 82 reflected by the second reflecting portion 42 propagates (+X direction) are orthogonal. In such a case, the angle between the reflective surface of the second reflecting portion 42 and the direction in which the reflected light 82 propagates toward the light receiving portion 5 (+X direction) may be 45 degrees. However, this angle value is merely an example and does not limit the present disclosure, and may be appropriately determined based on the expected position of the biological organism 9 relative to the biological detection device 1.

[0041] The other configurations and characteristics of the second reflector 42 are the same as those of the first reflector 41. Furthermore, the other configurations of the third unit 13 according to the second embodiment are the same as those of the second unit 12 according to the first embodiment, but with the direction parallel to the emission direction (+X direction) of the emitted light 81 reversed.

[0042] The configuration and operation of the control unit 71 and the detection unit 72 according to the second embodiment are the same as those of the first embodiment. Furthermore, the operation of the biological detection device 1 according to the second embodiment is also the same as that of the first embodiment.

[0043] As described above, in the second embodiment, the light-emitting unit 3 and the light-receiving unit 5 are mounted on the same second substrate 22, on the first mounting surface 22a and the second mounting surface 22c, which are opposite to each other. As a result, in the second embodiment as well, the second substrate 22 is arranged in such a way that the emitted light 81 emitted by the light-emitting unit 3 does not directly reach the light-receiving unit 5. Furthermore, the third substrate 23 and the light-shielding wall 24 used in the first embodiment can be omitted, and the biological detection device 1 according to the second embodiment can be expected to be even smaller and have further reduced manufacturing costs compared to the first embodiment.

[0044] [Third Embodiment] Figure 6 is a cross-sectional view of one example configuration of the biodetector 1 according to the third embodiment, viewed from the first direction (Y direction). Figure 7 is a plan view of the biodetector 1 shown in Figure 6, viewed from the second direction (Z direction) perpendicular to the first direction. Figure 8 is a block circuit diagram schematically showing an example of the electrical connection relationships in the biodetector 1 according to the third embodiment. As shown in Figures 6, 7, and 8, the biodetector 1 according to the third embodiment can be obtained by making the following changes to the biodetector 1 according to the second embodiment. Note that detailed explanations of parts of the third embodiment that are common with the second embodiment may be omitted.

[0045] The configuration of the second unit 12 and the third unit 13 according to the third embodiment is the same as in the second embodiment.

[0046] As shown in Figures 6 and 7, the first unit 11 is provided with a first light-receiving unit 51, a second light-receiving unit 52, and a third light-receiving unit 53 as light-receiving units 5. In a plan view from the direction in which the first light-emitting unit 31 emits the first emitted light 811 (+X direction), the first light-emitting unit 31 and the first light-receiving unit 51 may overlap. Similarly, in a plan view from the direction in which the second light-emitting unit 32 emits the second emitted light 812 (+X direction), the second light-emitting unit 32 and the second light-receiving unit 52 may overlap. Furthermore, in a plan view from the direction in which the third light-emitting unit 33 emits the third emitted light 813 (+X direction), the third light-emitting unit 33 and the third light-receiving unit 53 may overlap.

[0047] As shown in Figures 6 and 7, in the first unit 11, the first light receiving unit 51 may be configured to receive and detect the first reflected light 821 originating from the first emitted light 811 of the first color, but not to detect the second reflected light 822 originating from the second emitted light 812 of the second color, or the third reflected light 823 originating from the third emitted light 813 of the third color, even if they are received. Similarly, the second light receiving unit 52 may be configured to receive and detect the second reflected light 822 originating from the second emitted light 812 of the second color, but not to detect the first reflected light 821 originating from the first emitted light 811 of the first color, or the third reflected light 823 originating from the third emitted light 813 of the third color, even if they are received. Furthermore, the third light receiving unit 53 may be configured to receive and detect the third reflected light 823 originating from the third emitted light 813 of the third color, but not to detect the first reflected light 821 originating from the first emitted light 811 of the first color, or the second reflected light 822 originating from the second emitted light 812 of the second color, even if they are received.

[0048] As shown in Figure 8, the detection unit 72 according to the third embodiment is electrically connected to the first light receiving unit 51, the second light receiving unit 52, and the third light receiving unit 53, which are included in the light receiving unit 5. As a result, the detection unit 72 can receive the first reflected light 821, the second reflected light 822, and the third reflected light 823 received by the first light receiving unit 51, the second light receiving unit 52, and the third light receiving unit 53, and individually receive the first electrical signal, the second electrical signal, and the third electrical signal generated based on the first reflected light 821, the second reflected light 822, and the third reflected light 823, respectively. As a result, unlike the first and second embodiments, the third embodiment can accurately detect the biological information of the biological organism 9 to be detected without performing intermittent driving or coordinated operation of the light emitting unit 3 and / or the light receiving unit 5. Furthermore, by not performing intermittent driving or coordinated operation of the light emitting unit 3 and / or the light receiving unit 5, the power consumption of the biological detection device 1 can be reduced.

[0049] Furthermore, the control unit 71 according to the third embodiment can also individually control the operation of the first light-emitting unit 31, the second light-emitting unit 32, and the third light-emitting unit 33 included in the light-emitting unit 3, the first light-receiving unit 51, the second light-receiving unit 52, and the third light-receiving unit 53 included in the light-receiving unit 5, and the detection unit 72. Therefore, as in the first and second embodiments, it is possible to realize intermittent driving and coordinated operation of the light-emitting unit 31 and the light-receiving unit 5.

[0050] [Summary of this disclosure] A summary of this disclosure is provided below.

[0051] (Note 1) A light-emitting part that emits first light, A first reflecting part that reflects the first light toward a first direction, When the target organism is located in the first direction as viewed from the first reflecting part, the light receiving part receives the second light reflected by the target organism, A first substrate is disposed between the light-emitting section and the light-receiving section and blocks the first light, A detection unit that detects biological information of the organism to be detected based on the second light, Equipped with, In a plan view from the biological body to be detected, the light-emitting unit is positioned between the light-receiving unit and the first reflecting unit. The light-emitting unit irradiates the first light toward the first reflecting unit. Biological detection device. The configuration prevents the first light emitted from the light-emitting unit from directly reaching the light-receiving unit, thereby enabling accurate detection of the biological information of the target organism 9. By arranging the first substrate between the light-emitting and light-receiving sections, the biological detection device can be miniaturized.

[0052] (Note 2) The emission portion of the light-emitting portion that emits the first light is located on the opposite side from the light-receiving portion in the plan view. The biological detection device described in Appendix 1. The configuration prevents the first light emitted from the light-emitting unit from directly reaching the light-receiving unit, thereby enabling accurate detection of the biological information of the target organism 9.

[0053] (Note 3) The direction in which the light-emitting unit irradiates the first light is a second direction toward the first reflecting unit when viewed from the light-emitting unit. The biological detection device described in Appendix 1. The configuration prevents the first light emitted from the light-emitting unit from directly reaching the light-receiving unit, thereby enabling accurate detection of the biological information of the target organism 9.

[0054] (Note 4) The light-emitting part is, A first light-emitting unit that emits light that is included in the first light and is included in the first wavelength band, A second light-emitting unit that emits light included in the first light and included in the second wavelength band, A third light-emitting unit that emits light included in the first light and included in the third wavelength band, has The biological detection device described in Appendix 1. By using light in different wavelength bands, it is possible to accurately detect different types of biological information, such as pulse rate and blood oxygen saturation.

[0055] (Note 5) A second substrate extending along the first plane and supporting the first reflector portion. Furthermore, The first substrate extends along a second plane intersecting the first plane and supports the light-emitting portion and the light-receiving portion. The light-emitting portion is provided on the first surface of the second substrate, The light-receiving unit is provided on the second surface of the second substrate that faces the first surface. The biological detection device described in Appendix 1. By arranging the first substrate between the light-emitting and light-receiving sections, the biological detection device can be miniaturized.

[0056] (Note 6) The light-emitting part is, A first light-emitting unit that emits light that is included in the first light and is included in the first wavelength band, A second light-emitting unit that emits light included in the first light and included in the second wavelength band, A third light-emitting unit that emits light included in the first light and included in the third wavelength band, has The biological detection device described in Appendix 5. By using light in different wavelength bands, it is possible to accurately detect different types of biological information, such as pulse rate and blood oxygen saturation.

[0057] (Note 7) The light receiving unit is A first light-receiving unit that receives light included in the second light and included in the first wavelength band, A second light-receiving unit that receives light included in the second light and included in the second wavelength band, A third light-receiving unit that receives light included in the second light and included in the third wavelength band, has The biological detection device described in Appendix 6. It is possible to accurately detect biological information of the target organism without intermittent driving or coordinated operation of the light-emitting and / or light-receiving units.

[0058] (Note 8) In a plan view from the first direction in which the light-emitting unit emits the first light, The first light-emitting unit and the first light-receiving unit overlap, The second light-emitting section and the second light-receiving section overlap, The third light-emitting section and the third light-receiving section overlap. The biological detection device described in Appendix 7.

[0059] (Note 9) Control unit that controls the light-emitting unit and the light-receiving unit. Furthermore, The control unit, A first control that, during a first period, puts the first light-emitting unit and the first light-receiving unit into an operating state and the second light-emitting unit and the second light-receiving unit into a non-operating state, During the second period, a second control is performed to deactivate the first light-emitting unit and the first light-receiving unit, and to activate the second light-emitting unit and the second light-receiving unit. Perform The biological detection device described in Appendix 7. By suppressing the emission of light that causes noise, the biological information of the target organism 9 can be detected with high accuracy.

[0060] (Note 10) The light-emitting part is, A light-emitting element that emits the first light by surface emission has The biological detection device described in Appendix 1.

[0061] (Note 11) A first unit having a first reflective portion, a first support portion that supports the first surface of the first reflective portion, and a first protective portion that protects the second surface of the first reflective portion that faces the first surface, The first substrate and the second unit having the light-emitting part, A second substrate supporting the first unit and the second unit, Furthermore, it is equipped with The biological detection device described in Appendix 1.

[0062] (Note 12) A third unit having the light-receiving section, a second protective section for protecting the light-receiving section, and a third substrate for supporting the light-receiving section. Furthermore, The second substrate further supports the third unit. The biological detection device described in Appendix 11.

[0063] (Note 13) The second unit has the light-emitting portion mounted on the first surface of the second unit, and the light-receiving portion further mounted on the second surface facing the first surface, A third unit having a second reflective portion, a second support portion that supports the first surface of the second reflective portion, and a second protective portion that protects the second surface of the second reflective portion that faces the first surface. Furthermore, The second substrate further supports the third unit. The biological detection device described in Appendix 11. The biodetector is manufactured by bonding multiple units, each manufactured independently, onto the same substrate. As a result, a reduction in manufacturing difficulty, an improvement in manufacturing yield, and a reduction in manufacturing costs are expected.

[0064] The invention made by the inventor has been described in detail based on embodiments above, but it goes without saying that the present invention is not limited to these embodiments and can be modified in various ways without departing from its essence. Furthermore, the features described in the embodiments can be freely combined within a range that does not contradict the technical aspects. [Explanation of symbols]

[0065] 1...Biometric detection device, 11...First unit, 12...Second unit, 13...Third unit, 21...First substrate, 21a...Mounting surface, 22...Second substrate, 22a...First mounting surface, 22b...End face, 22c...Second mounting surface, 23...Third substrate, 231...Mounting surface, 24...Light shielding part, 3...Light-emitting part, 30...First protective part, 30a...Surface, 30b...End face, 31...First light-emitting part, 32...Second light-emitting part, 33...Third light-emitting part, 41...First reflective part, 411...First support part, 411a...Slanted surface, 411b...Bottom surface ,412...Second protective part, 42...Second reflective part, 421...Second support part, 422...Fourth protective part, 5...Light receiving part, 50...Protective part, 50a...Surface, 50b...End face, 51...First light receiving part, 52...Second light receiving part, 53...Third light receiving part, 71...Control unit, 72...Detection unit, 81...Irradiated light, 811...First color emitted light, 812...Second color emitted light, 813...Third color emitted light, 82...Reflected light, 821...First color reflected light, 822...Second color reflected light, 823...Third color reflected light, 9...Biological organism to be detected

Claims

1. A light-emitting part that emits first light, A first reflecting part that reflects the first light toward a first direction, When the target organism is located in the first direction as viewed from the first reflecting part, the light receiving part receives the second light reflected by the target organism, A first substrate is disposed between the light-emitting section and the light-receiving section and blocks the first light, A detection unit that detects biological information of the target organism based on the second light, Equipped with, In a plan view from the biological body to be detected, the light-emitting unit is positioned between the light-receiving unit and the first reflecting unit. The light-emitting unit irradiates the first light toward the first reflecting unit. Biological detection device.

2. The emission portion of the light-emitting portion that emits the first light is located on the opposite side from the light-receiving portion in the plan view. The biological detection device according to claim 1.

3. The direction in which the light-emitting unit irradiates the first light is a second direction toward the first reflecting unit when viewed from the light-emitting unit. The biological detection device according to claim 1.

4. The light-emitting part is, A first light-emitting unit that emits light that is included in the first light and is included in the first wavelength band, A second light-emitting unit that emits light included in the first light and included in the second wavelength band, A third light-emitting unit that emits light included in the first light and included in the third wavelength band, has The biological detection device according to claim 1.

5. A second substrate extending along the first plane and supporting the first reflector portion. Furthermore, The first substrate extends along a second plane intersecting the first plane and supports the light-emitting portion and the light-receiving portion. The light-emitting portion is provided on the first surface of the second substrate, The light-receiving unit is provided on the second surface of the second substrate that faces the first surface. The biological detection device according to claim 1.

6. The light-emitting part is, A first light-emitting unit that emits light that is included in the first light and is included in the first wavelength band, A second light-emitting unit that emits light included in the first light and included in the second wavelength band, A third light-emitting unit that emits light included in the first light and included in the third wavelength band, has The biological detection device according to claim 5.

7. The light receiving unit is A first light-receiving unit that receives light included in the second light and included in the first wavelength band, A second light-receiving unit that receives light included in the second light and included in the second wavelength band, A third light-receiving unit that receives light included in the second light and included in the third wavelength band, has The biological detection device according to claim 6.

8. In a plan view from the first direction in which the light-emitting unit emits the first light, The first light-emitting unit and the first light-receiving unit overlap, The second light-emitting unit and the second light-receiving unit overlap, The third light-emitting unit and the third light-receiving unit overlap. The biological detection device according to claim 7.

9. Control unit that controls the light-emitting unit and the light-receiving unit. Furthermore, The control unit, A first control is performed during a first period, which involves setting the first light-emitting unit and the first light-receiving unit to an operating state and the second light-emitting unit and the second light-receiving unit to a non-operating state. During the second period, a second control is performed to deactivate the first light-emitting unit and the first light-receiving unit, and to activate the second light-emitting unit and the second light-receiving unit. Perform The biological detection device according to claim 7.

10. The light-emitting part is, A light-emitting element that emits the first light by surface emission has The biological detection device according to claim 1.

11. A first unit having a first reflective portion, a first support portion that supports the first surface of the first reflective portion, and a first protective portion that protects the second surface of the first reflective portion that faces the first surface, The first substrate and the second unit having the light-emitting part, A second substrate supporting the first unit and the second unit, To further enhance The biological detection device according to claim 1.

12. A third unit having the light-receiving section, a second protective section for protecting the light-receiving section, and a third substrate for supporting the light-receiving section. Furthermore, The second substrate further supports the third unit. The biological detection device according to claim 11.

13. The second unit has the light-emitting portion mounted on the first surface of the second unit, and the light-receiving portion further mounted on the second surface facing the first surface, A third unit having a second reflective portion, a second support portion that supports the first surface of the second reflective portion, and a second protective portion that protects the second surface of the second reflective portion that faces the first surface. Furthermore, The second substrate further supports the third unit. The biological detection device according to claim 11.

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