Biological information measuring device

Abstract

To accurately detect the body movements of a subject regardless of temperature fluctuations. [Solution] The first embodiment of the biological information measuring device 100 comprises a biological information detection device 10A and a contact detection unit 24 that detects contact with a target OB. The biological information detection device 100a includes a first light-emitting member 211 that emits a first light L1 toward the target OB, a first light-receiving member 221 that receives the first light L1 from the target OB, and a control unit CT that acquires biological information of the target OB based on the first light L1 received by the first light-receiving member 221. The contact detection unit 24 is provided on the detection unit side of the biological information detection device 10A where the first light-emitting member 211 and the first light-receiving member 221 are provided, and the control unit CT determines the contact state with the target OB based on the detection value of the contact detection unit 24.

Description

Technical Field

[0001] The present invention relates to a biological information measuring device that is attached to the body and optically detects biological information.

Background Art

[0002] As a biological information measuring device, there is a known device that uses light to acquire biological information by a biological sensor unit, acquires the movement of the body by a body movement sensor, and performs a biological evaluation based on the biological information and the movement of the body (Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the biological information measuring device of Patent Document 1 described above, the acceleration sensor used in the body movement sensor is affected by temperature such as the body temperature of the subject, so the detected value of the acceleration fluctuates depending on the temperature, and it is difficult to accurately detect the movement of the subject's body. Therefore, it is difficult to determine the contact state between the biological information measuring device and the living body due to the movement of the body.

Means for Solving the Problems

[0005] A biological information measuring device in one aspect of the present invention comprises a biological information detection device and a contact detection unit for detecting contact with an object. The biological information detection device includes a first light-emitting member that emits first light toward the object, a first light-receiving member that receives first light from the object, and a control unit that acquires biological information of the object based on the first light received by the first light-receiving member. The contact detection unit is provided on the detection unit side of the biological information detection device where the first light-emitting member and the first light-receiving member are provided, and the control unit determines the contact state with the object based on the detected value of the contact detection unit. [Brief explanation of the drawing]

[0006] [Figure 1] This is a bottom view of the biological information measuring device according to the first embodiment. [Figure 2] This is a lateral cross-sectional view of the biological information measuring device according to the first embodiment. [Figure 3] This is a magnified view of the sensor device from the bottom. [Figure 4] This is an enlarged side cross-section view of the sensor device. [Figure 5] This is a bottom view illustrating the contact state of an object with respect to the lens component. [Figure 6] This is a bottom view illustrating the contact state of an object with respect to the lens component. [Figure 7] This is a bottom view illustrating the contact state of an object with respect to the lens component. [Figure 8] This is a cross-sectional view illustrating the contact state of an object with respect to a lens component. [Figure 9] This figure illustrates the light distribution of the first light emitted from the first light-emitting member. [Figure 10] The light reception distribution in the first light receiving member for the first light is illustrated as an example. [Figure 11] This diagram illustrates the arrangement of the contact detection components and the contact detection state. [Figure 12] This diagram illustrates the arrangement of the contact detection components and the contact detection state. [Figure 13] This is a bottom view of the biological information measuring device according to the second embodiment. [Figure 14]It is a side sectional view of a biological information measuring device according to the second embodiment. [Figure 15] It is a bottom view illustrating the contact state of the object with respect to the lens member. [Figure 16] It is a bottom view illustrating the contact state of the object with respect to the lens member. [Figure 17] It is a diagram for explaining a biological information measuring device according to the third embodiment. [Figure 18] It is a diagram for explaining a biological information measuring device according to the third embodiment. [Figure 19] It is a diagram for explaining a biological information measuring device according to the fourth embodiment. [Figure 20] It is a diagram for explaining a biological information measuring device according to the fourth embodiment. [Figure 21] It is a diagram for explaining a biological information measuring device according to the fourth embodiment.

Modes for Carrying Out the Invention

[0007] [First Embodiment] Hereinafter, a biological information measuring device according to the first embodiment of the present invention will be described with reference to the drawings.

[0008] FIG. 1 is a conceptual bottom view for explaining a biological information measuring device according to the first embodiment, and FIG. 2 is a conceptual side sectional view for explaining a biological information measuring device according to the first embodiment.

[0009] The biological information measuring device 100 has a wristwatch-like appearance and can be worn on the arm, which is a part of the human body, that is, the living body HB. It includes a main body device 100a and a pair of wristbands 100b attached to the main body device 100a and extending in opposite directions. Here, the main body device 100a includes a sensor device 20, a control circuit device 30, a battery 40, a display 50, and a case 70.

[0010] In the main body device 100a, the sensor device 20 includes a first light emitting member 211, a first light receiving member 221, a contact detection unit 24, a circuit board 25, a partition member 261, and a lens member 27. Here, the first light emitting member 211, the first light receiving member 221, the circuit board 25, the partition member 261, and the lens member 27 function as a biological information detection device 10A. Also, the contact detection unit 24 and the circuit board 25 function as a contact detection device 10B. The first light emitting member 211 is a light emitting diode that emits irradiation light DL such as green light, red light, infrared light, etc. The first light emitting member 211 emits the first light L1, which is the irradiation light DL, toward the living body HB through the window member 27w of the lens member 27. The first light receiving member 221 is a photodiode that receives return light SL such as green light, red light, infrared light, etc. The first light receiving member 221 receives the first light L1, which is the return light SL that has returned through the window member 27w, and outputs a signal corresponding to the intensity of the first light L1. The combination of the first light emitting member 211 and the first light receiving member 221 is called an optical sensor or an optical detection unit 20a. With the optical detection unit 20a, for example, the pulsation of blood flow can be detected as the intensity variation of the first light L1, which is the return light SL from an artery, and information regarding the pulse rate, etc. can be obtained.

[0011] The contact detection unit 24 is provided on the side of the optical detection unit 20a where the first light emitting member 211 and the first light receiving member 221 are provided, with the circuit board 25 as a reference, and detects contact with the living body HB, which is the target OB. Specifically, the contact detection unit 24 is provided on the lens member 27. The contact detection unit 24 is, for example, a current sensor that uses electrostatic induction and detects the current generated by the contact of the living body HB. In this specification, when it is described that the contact detection unit 24 is in a contact state with the living body HB or the target OB, it includes the case where, as a result of the living body HB or the target OB contacting the lens member 27, the target OB is arranged in the vicinity of the contact detection unit 24 and is in an indirect but contact state.

[0012] Figures 3 and 4 are enlarged views of the bottom and side cross-sections of the sensor device 20. The contact detection unit 24 includes a plurality of contact detection members 24a arranged in a two-dimensional matrix. Each contact detection member 24a is a rectangular transparent electrode made of, for example, ITO, and is fixed to the inner surface 27b of the lens member 27. When the target OB, i.e., biological HB, comes into contact with a local area of ​​the outer surface 27a of the lens member 27 corresponding to the contact detection member 24a, or its vicinity, the contact detection member 24a generates a weak electrostatic induction current. Although not shown in the figure, wiring extends independently from each contact detection member 24a and is connected to the second drive circuit 25b. Each contact detection member 24a outputs a detection signal to the second drive circuit 25b depending on whether or not contact is present. The detection signal from the contact detection unit 24 makes it possible to determine the contact state between the target OB and the lens member 27, specifically the increase or decrease in the contact area or the change in the bias of the contact area. The contact state between the target OB and the lens member 27 reflects the movement of the target OB wearing the biological information measuring device 100, and corresponds to information regarding the movement (body movement) of the biological HB.

[0013] Although not shown in the illustration, the contact detection member 24a may be formed not only on the inner surface 27b of the lens member 27, but also on the outer surface 27a.

[0014] The contact detection member 24a is not limited to a transparent electrode, but may also be, for example, a rectangular conductive frame. In this case, the four sides of the rectangle are formed of thin metal strips. The rectangular conductive frame itself blocks the first light L1, but the opening of the conductive frame transmits the first light L1. When the target OB, i.e., the biological HB, comes into contact with the local area of ​​the outer surface 27a of the lens member 27 that corresponds to the conductive frame of the contact detection member 24a, or its vicinity, the conductive frame contact detection member 24a generates a weak electrostatic induction current.

[0015] In the contact detection unit 24 or the lens member 27, the first region RE1 includes a first portion P1 that overlaps with the first light-emitting member 211 in a plan view or bottom view, and the second region RE2 includes a second portion P2 that overlaps with the first light-receiving member 221 in a plan view or bottom view. In the first region RE1 or the first portion P1, if the target OB is not in contact with the lens member 27, the intensity of the first light L1 incident from the first light-emitting member 211 to the target OB may be relatively weaker compared to when it is in contact. Also, in the second region RE2 or the second portion P2, if the target OB is not in contact with the lens member 27, the intensity of the first light L1 incident from the target OB to the first light-receiving member 221 may be relatively weaker compared to when it is in contact. The decrease in the intensity of the first light L1 caused by the contact conditions described above can be compensated for by increasing the intensity of the first light L1 emitted from the first light-emitting member 211, or by increasing the detection sensitivity of the first light L1 by the first light-receiving member 221.

[0016] The circuit board 25 supports and fixes the first light-emitting member 211, the first light-receiving member 221, and the partition member 261 on its upper surface 25u. The circuit board 25 has a first drive circuit 25a that operates the first light-emitting member 211 and the first light-receiving member 221, and a second drive circuit 25b that operates the contact detection unit 24. The first drive circuit 25a outputs information regarding the optical response of the target OB, which is a biological HB, specifically information regarding the pulse rate, to the control circuit device 30. The second drive circuit 25b outputs information regarding the contact state between the target OB and the lens member 27 to the control circuit device 30.

[0017] The partition member 261 separates the space where the first light-emitting member 211 is located from the space where the first light-receiving member 221 is located. Specifically, the partition member 261 is provided between the first light-emitting member 211 and the first light-receiving member 221 in the ±X direction in which the first light-emitting member 211 and the first light-receiving member 221 are aligned, and extends in the ±Y direction perpendicular to the direction in which the first light-emitting member 211 and the first light-receiving member 221 are aligned. Furthermore, the partition member 261 extends to a height close to the lens member 27 in the vertical +Z direction. The partition member 261 is formed of, for example, a black resin material, has low thermal conductivity and light-shielding properties. The partition member 261 prevents the first light L1 emitted from the first light-emitting member 211 from directly entering the first light-receiving member 221. Furthermore, the partition member 261 prevents the radiant heat from the first light-emitting member 211 from being transferred to the first light-receiving member 221. The main body material of the circuit board 25 is also made of a material with low thermal conductivity and light-shielding properties. As a result, the space in which the first light-emitting member 211 is located and the space in which the first light-receiving member 221 is located are optically open only in the direction of the window member 27w of the lens member 27.

[0018] The lens member 27 has a central window member 27w and a peripheral outer frame member 27p, and is positioned to overlap the first light-emitting member 211 and the first light-receiving member 221 when viewed from the +Z direction in a plan view or bottom view. The lens member 27 is made of a material such as glass or resin, and has light transmittance to efficiently transmit the first light L1, as well as insulating properties to prevent electrical contact between the target OB and the contact detection unit 24.

[0019] Returning to Figures 1 and 2, the control circuit 30 is an arithmetic processing circuit including a microprocessor, which operates the sensor device 20, measures biological information based on the detection value of the light detection unit 20a, and measures and determines the contact state and motion state of the target OB with respect to the lens member 27 based on the detection value of the contact detection unit 24. The control circuit 30 and the circuit board 25 together are called the control unit CT. The control circuit 30 or control unit CT acquires biological information such as the pulse rate of the target OB based on the first light L1 received by the first light receiving member 221, and acquires body movement information regarding the motion state of the target OB based on the contact state with the target OB detected by the contact detection member 24a. The control circuit 30 can also correct the operation of the light detection unit 20a based on the contact state of the target OB obtained using the contact detection unit 24. The control circuit 30 can display the measurement results from the sensor device 20 on the display 50. The control circuit 30 may also include a communication circuit and an antenna that enable digital communication with external devices.

[0020] The battery 40 supplies power to the sensor device 20 and the control circuit device 30, operating them. The battery 40 may be a rechargeable secondary battery. In this case, a charging circuit and the like can be incorporated into the case 70 of the biological information measuring device 100.

[0021] The display 50 is either a liquid crystal panel or an organic EL display, and performs display operations under the control of the control circuit device 30, displaying various information such as measurement results. The display 50 is located inside the case 70, on the opposite side of the lens member 27 with respect to the circuit board 25, and is covered by a light-transmitting plate-shaped window member 70w fixed to the opening 70o.

[0022] Figures 5-7 are bottom views illustrating the contact state of the target OB with respect to the lens member 27. The contact detection member 24a corresponding to the lens member 27 that the target OB is in contact with, i.e., the contact detection member 24a that is detecting contact, is indicated by dot pattern hatching. In Figure 5, region AR1 shows the state in which the target OB is in contact with the entire lens member 27, region AR2 shows the state in which the target OB is in contact with the left half (-X side) of the lens member 27, and region AR3 shows the state in which the target OB is in contact with the right half (+X side) of the lens member 27. In Figure 6, region BR1 shows the state in which the target OB is in contact with the upper half (+Y side) of the lens member 27, and region BR2 shows the state in which the target OB is in contact with the lower half (-Y side) of the lens member 27. In Figure 7, region CR1 shows the state in which the target OB is in contact with the lens member 27, mainly concentrated in the central part, and region CR2 shows the state in which the target OB is in contact with almost the entire lens member 27, excluding the outer edge.

[0023] Figure 8 is a cross-sectional view illustrating the contact state of the target OB with respect to the lens member 27. In Figure 8, region DR1 shows the state in which the target OB is in contact with the left half (-X side) of the lens member 27, corresponding to the state shown in region AR2 in Figure 5. In Figure 8, region DR2 shows the state in which the target OB is in contact with the right half (+X side) of the lens member 27, corresponding to the state shown in region AR3 in Figure 5. In Figure 8, region DR3 shows the state in which the target OB is in contact with the central part of the lens member 27, corresponding to the state shown in region CR1 in Figure 7.

[0024] For example, if the contact area fluctuates as shown in regions AR2 and AR3 of Figure 5, it is assumed that the target OB is reciprocating rotational motion, i.e., oscillating, around the Y-axis relative to the sensor device 20. Similarly, if the contact area fluctuates as shown in regions BR1 and BR2 of Figure 6, it is assumed that the target OB is reciprocating rotational motion, i.e., oscillating, around the X-axis relative to the sensor device 20. If the contact area fluctuates as shown in regions CR1 and CR2 of Figure 7, it is assumed that the target OB is reciprocating movement in the Z-axis direction relative to the sensor device 20. The contact area fluctuates as shown in Figures 5 and 6 can be determined from the contour of the area of ​​the contact detection member 24a indicating contact (hereinafter also referred to as the contact area) and the position fluctuation of its center of gravity. Such position fluctuations of the contact area are processed as data in the control circuit device 30 as velocity or acceleration in the X or Y direction. The contact area fluctuates as shown in Figure 7 can be determined from the increase or decrease in the area and contour size of the contact area of ​​the contact detection member 24a. Such fluctuations in the contact area are processed as data in the control circuit device 30, representing velocity and acceleration in the Z direction. As described above, the fluctuation information regarding the X, Y, and Z directions of the contact area detected by the contact detection unit 24 is managed in the control circuit device 30 as body movement information that reflects the three-dimensional movement of the target OB or biological HB.

[0025] In the inclined state shown in region DR2 of Figure 8, the contact area of ​​the contact detection member 24a is biased to the right half, and the first light L1, which is the irradiation light DL from the first light-emitting member 211, is incident on the skin of the target OB that is farther away from the lens member 27 via an air layer. It is estimated that the intensity of the first light L1 incident on the target OB that is further away from the lens member 27 is relatively lower than the intensity of the first light L1 incident on the target OB that is in close contact with the lens member 27, and this is thought to affect the measurement results of blood flow, etc. It is desirable to increase the light emission intensity of the first light-emitting member 211 in order to counteract or reduce such effects.

[0026] When the first light L1 from the first light-emitting member 211 is incident on the skin of a target OB that is partially separated from the lens member 27, it is more desirable to consider the orientation distribution of the first light L1 emitted from the first light-emitting member 211.

[0027] Figure 9 illustrates the light distribution D1 of the first light L1 from the first light-emitting member 211. Of the first light L1 emitted from the first light-emitting member 211, the component LC1 directed inward, to the right (+X side) of the reference plane SF1 which passes through the center of the first light-emitting member 211 and is parallel to the YZ direction, has a high probability of being incident on the first light-receiving member 221 via the target OB, while the component LC2 directed outward, to the left (-X side) of the reference plane SF1, has a low probability of being incident on the first light-receiving member 221 via the target OB. Therefore, if the sensor device 20 is relatively tilted and the skin of the target OB is separated from the lens member 27 on the outside (-X side) of the reference plane SF1, it is considered that more appropriate measurement results can be obtained by not performing a correction to increase the light emission intensity of the first light-emitting member 211.

[0028] Conversely, in the case of the inclined state shown in region DR1 of Figure 8, the contact area of ​​the contact detection member 24a is biased to the left half, and the first light L1, which is the reflected light SL from the skin of the target OB that is far away from the lens member 27, is incident on the first light receiving member 221 through the air layer. It is estimated that the intensity of the first light L1 incident on the first light receiving member 221 from the target OB that is further away from the lens member 27 is relatively lower than the intensity of the first light L1 incident on the first light receiving member 221 from the target OB that is in close contact with the lens member 27, and this is thought to affect the measurement results of blood flow, etc. It is desirable to increase the detection sensitivity of the first light receiving member 221 in order to counteract or reduce such effects.

[0029] When the first light L1 emitted from the skin of the target OB, which is partially separated from the lens member 27, is incident on the first light-receiving member 221, it is more desirable to consider the light reception distribution D2 in the first light-receiving member 221.

[0030] Figure 10 illustrates the light reception distribution D2 of the first light L1 in the first light-receiving member 221. Of the first light L1 incident on the first light-receiving member 221, the component IC1 incident on the inside, to the left (-X side) of the reference plane SF2 that passes through the center of the first light-receiving member 221 and is parallel to the YZ direction, has a relatively high intensity, while the component IC2 incident on the outside, to the right (+X side) of the reference plane SF2, has a relatively low intensity. In other words, the distribution of reflected light SL from the target OB's skin in the first light-receiving member 221 is concentrated on the first light-emitting member 211 side. Therefore, if the sensor device 20 is relatively tilted and the target OB's skin is separated from the lens member 27 on the outside (+X side) of the reference plane SF2, it is considered that more appropriate measurement results can be obtained by not performing a correction to increase the detection sensitivity of the first light-receiving member 221.

[0031] Figures 11 and 12 illustrate the arrangement of the contact detection member 24a constituting the contact detection unit 24 relative to the first light-emitting member 211 and the first light-receiving member 221, as well as the contact detection state by the contact detection member 24a. In Figure 11, regions ER1, ER2, ER3, and ER4 mainly show specific examples where the contact state changes on the first light-emitting member 211 side. In Figure 12, regions FR1, FR2, FR3, and FR4 mainly show specific examples where the contact state changes on the first light-receiving member 221 side.

[0032] Referring to the region ER1 shown in Figure 11, the contact detection member 24a constituting the contact detection unit 24 is provided in the first region RE1 facing the first light-emitting member 211 and the second region RE2 facing the first light-receiving member 221.

[0033] In the contact detection unit 24 or the lens member 27, the first region RE1 includes first portions 241a and 241b (corresponding to the first portion P1 in Figure 3) that overlap with the first light-emitting member 211 in a plan view or a bottom view. In the illustrated example, one element 241a of the first portions 241a and 241b is located on the +X side of the reference plane SF1 and close to the first light-receiving member 221, while the other element 241b of the first portions 241a and 241b is located on the -X side of the reference plane SF1 and far from the first light-receiving member 221.

[0034] In the contact detection unit 24 or the lens member 27, the second region RE2 includes second portions 242a and 242b (corresponding to the second portion P2 in Figure 3) that overlap with the first light-receiving member 221 in a plan view or a bottom view. In the illustrated example, three elements 242a of the second portions 242a and 242b are located on the -X side of the reference plane SF2 and close to the first light-emitting member 211, while the other three elements 242b of the second portions 242a and 242b are located on the +X side of the reference plane SF2 and far from the first light-emitting member 211.

[0035] In the state shown in region ER1 of Figure 11, the control circuit device 30, which is the control unit CT shown in Figure 2, determines that the element 241b on the side of the first part 241a, 241b that is farther from the second part 242a, 242b is in a non-contact state, and the element 241a on the side of the first part 241a, 241b that is closer to the second part 242a, 242b is in a contact state. In this case, the control circuit device 30 does not correct the intensity of the first light L1 emitted by the first light-emitting member 211. When the first light-emitting member 211 is in a state where it is unlikely to have an effect on the intensity of the first light L1 that reaches the first light-receiving member 221, the processing load can be reduced by not performing the correction.

[0036] In the state shown in region ER2 of Figure 11, the control unit CT, which is the control circuit device 30, determines that both the element 241a closer to the second portion 242a, 242b and the element 241b further away from the second portion 242a, 242b are in a non-contact state. In this case, the control circuit device 30 corrects the intensity of the first light L1 emitted by the first light-emitting member 211 to be higher than the intensity of the first light L1 emitted by the first light-emitting member 211 when it is determined that at least the element 241a closer to the second portion 242a, 242b is in a contact state. This allows for correction to be performed in accordance with the contact state and the light emission distribution.

[0037] In the state shown in region ER3 of Figure 11, the control unit CT, which is the control circuit device 30, determines that both the element 241b on the side of the first part 241a, 241b that is farther from the second part 242a, 242b and the element 241a on the side of the first part 242a, 242b that is closer to the second part 242a, 242b are in a non-contact state. In this case, the control circuit device 30 corrects the intensity of the first light L1 emitted by the first light-emitting member 211 to be higher than the intensity of the first light L1 emitted by the first light-emitting member 211 when it is determined that at least the element 241a on the side of the first part 241a, 241b that is closer to the second part 242a, 242b is in a contact state. In this case, the control circuit device 30 also determines that the second part 242a, 242b that overlaps with the first light-receiving member 221 in a plan view is in non-contact and corrects the detection sensitivity or light-receiving sensitivity of the first light-receiving member 221, but the details will be described later.

[0038] In the state shown in region ER4 of Figure 11, the control unit CT, which is the control circuit device 30, determines that of the first parts 241a and 241b, the element 241b furthest from the second parts 242a and 242b is in contact, and the element 241a closer to the second parts 242a and 242b is not in contact. In this case, the control circuit device 30 corrects the intensity of the first light L1 emitted by the first light-emitting member 211 to be higher than the intensity of the first light L1 emitted by the first light-emitting member 211 when it is determined that the farther element 241b is not in contact and the closer element 241a is in contact.

[0039] In the state shown in region FR1 of Figure 12, the control unit CT, which is the control circuit device 30, determines that the element 242b on the side of the second part 242a, 242b that is farther from the first part 241a, 241b is in a non-contact state, and the element 242a on the side of the second part 242a, 242b that is closer to the first part 241a, 241b is in a contact state. In this case, the control circuit device 30 does not correct the light receiving sensitivity of the first light receiving member 221 to the first light L1. When the intensity of the first light L1 received on the first light receiving member 221 side is unlikely to be affected, the processing load can be reduced by not performing the correction.

[0040] In the state shown in region FR2 of Figure 12, the control unit CT, which is the control circuit device 30, determines that both the element 242a closer to the first part 241a, 241b and the element 242b further from the first part 241a, 241b are in a non-contact state. In this case, the control circuit device 30 corrects the light receiving sensitivity of the first light receiving member 221 to the first light L1 to be higher than the light receiving sensitivity of the first light receiving member 221 to the first light L1 when it is determined that at least the element 242a closer to the first part 241a, 241b of the second part 242a, 242b is in a contact state. This allows for correction to be performed in accordance with the contact state and the light emission distribution.

[0041] In the state shown in region FR3 of Figure 12, the control unit CT, which is the control circuit device 30, determines that both the element 242b on the side of the second part 242a, 242b that is farther from the first part 241a, 241b and the element 242a on the side of the second part 241a, 241b that is closer to the first part 241a, 241b are in a non-contact state. In this case, the control circuit device 30 corrects the light receiving sensitivity of the first light receiving member 221 to the first light L1 to be higher than the light receiving sensitivity of the first light receiving member 221 to the first light L1 when it is determined that at least the element 242a on the side of the second part 242a, 242b that is closer to the first part 241a, 241b is in a contact state.

[0042] In the state shown in region FR4 of Figure 12, the control unit CT, which is the control circuit device 30, determines that of the second parts 242a and 242b, the element 242b furthest from the first parts 241a and 241b is in contact, and the element 242a closer to the first parts 241a and 241b is not in contact. In this case, the control circuit device 30 corrects the light receiving sensitivity of the first light receiving member 221 to the first light L1 to be higher than the light receiving sensitivity of the first light receiving member 221 to the first light L1 when it is determined that the farther element 242b is not in contact and the closer element 242a is in contact.

[0043] As a result, in the state shown in region ER1 of Figure 11 and region FR1 of Figure 12, similar to the tilt state shown in region DR3 of Figure 8, the central part of the contact detection unit 24 that overlaps with the first light-emitting member 211 and the first light-receiving member 221 is in contact, and no correction is performed.

[0044] In the operation described above, the control circuit device 30, which is the control unit CT, controls the first light-emitting member 211 and the first light-receiving member 221 according to the contact state between the first region RE1, i.e., the first parts 241a and 241b, and the second region RE2, i.e., the second parts 242a and 242b. This makes it possible to correct the light emission intensity of the first light-emitting member 211 according to the contact state on the first light-emitting member 211 side, or to correct the light-receiving sensitivity of the first light-receiving member 221 according to the contact state on the first light-receiving member 221 side, thereby improving the detection accuracy of the biological information measuring device 100.

[0045] The size, arrangement, and density of the contact detection members 24a shown in Figures 11 and 12 are merely illustrative examples. For example, it is not necessary to arrange the boundaries of the contact detection members 24a so as to sandwich the center of the first light-emitting member 211 or the reference plane SF1, nor is it necessary to arrange the boundaries of the contact detection members 24a so as to sandwich the center of the first light-receiving member 221 or the reference plane SF2.

[0046] Corrections to the luminescence intensity of the first light-emitting member 211 and the light-receiving sensitivity of the first light-receiving member 221 can be appropriately set based on the arrangement relationship and contact state of the contact detection members 24a relative to the first light-emitting member 211 and the first light-receiving member 221. For example, if a boundary exists between a group of contact detection members 24a in contact and a group of contact detection members 24a in non-contact at a position away from the front of the first light-emitting member 211, the amount of correction for luminescence intensity can be relatively increased according to the distance from the front to the boundary. Similarly, if a boundary exists between a group of contact detection members 24a in contact and a group of contact detection members 24a in non-contact at a position away from the front of the first light-receiving member 221, the amount of correction for light-receiving sensitivity can be relatively increased according to the distance from the front to the boundary.

[0047] The biological information detected by the light detection unit 20a is affected by fluctuations in the contact state between the target OB or biological HB and the lens member 27 or contact detection unit 24, particularly fluctuations in the tilt from the Z axis toward the X and Y directions as shown in Figure 8. Therefore, the control circuit device 30 may use the motion signal detected by the contact detection unit 24 to perform processing to remove disturbing noise components from the biological signal detected by the light detection unit 20a. For example, if the biological signal obtained by the light detection unit 20a is 60Hz and the motion signal obtained by the contact detection unit 24 is 10Hz or 90Hz, removing the 10Hz or 90Hz noise component from the biological signal obtained by the light detection unit 20a will improve the accuracy of the biological signal. In other words, the control circuit device 30 or control unit CT determines the noise component contained in the signal corresponding to the first light L1 received by the first light receiving member 221 based on the change in the contact state between the first region RE1 and the second region RE2, and obtains the biological information of the target OB from the signal from which the noise component has been removed. This makes it possible to determine and remove noise components applied to the biological information measuring device 100 according to the contact state.

[0048] As described above, the biological information measuring device 100 of the first embodiment comprises a biological information detection device 10A and a contact detection unit 24 that detects contact with a target OB. The biological information detection device 10A includes a first light-emitting member 211 that emits a first light L1 toward the target OB, a first light-receiving member 221 that receives the first light L1 from the target OB, and a control unit CT that acquires biological information of the target OB based on the first light L1 received by the first light-receiving member 221. The contact detection unit 24 is provided on the detection unit side of the biological information detection device 10A where the first light-emitting member 211 and the first light-receiving member 221 are provided, and the control unit CT determines the contact state with the target OB based on the detection value of the contact detection unit 24.

[0049] In the above-described biological information measuring device 100, the contact detection unit 24 provided on the detection unit side of the biological information detection device 10A detects contact with the target OB, and the control unit CT determines the contact state with the target OB based on the value detected by the contact detection unit 24. Therefore, it is possible to determine the contact state caused by the movement of the biological HB, which is the target OB, or the body, without using an acceleration sensor that is affected by temperature such as the body temperature of the subject.

[0050] [Second Embodiment] The second embodiment of the biological information measuring device will now be described. Note that the second embodiment of the biological information measuring device is a partial modification of the first embodiment, and the parts common to both the first embodiment and the second embodiment will not be described.

[0051] Figure 13 is a bottom view illustrating the second embodiment of the biological information measuring device, and Figure 14 is a side cross-sectional view illustrating the second embodiment of the biological information measuring device. The biological information measuring device 100 of the second embodiment includes, as a light detection unit 20a, a first light-emitting member 211, a pair of second light-emitting members 212, 213, a first light-receiving member 221, and a second light-receiving member 222.

[0052] The first light-emitting member 211 is a light-emitting diode that emits green light as the first light L1, the second light-emitting member 212 is a light-emitting diode that emits red light with a longer wavelength than the first light L1 as the second light L2, and the other second light-emitting member 213 is a light-emitting diode that emits infrared light with a longer wavelength than the second light L2 as the third light L3. The first light-receiving member 221 is a photodiode that receives the first light L1, which is the green reflected light, and outputs a signal corresponding to the intensity of the first light L1, and the second light-receiving member 222 is a photodiode that receives the second light L2 and third light L3, which are the red or infrared reflected light, and outputs a signal corresponding to the intensity of the second light L2 and third light L3.

[0053] In the contact detection unit 24 or lens member 27, the first region RE1 includes a first portion P1 that overlaps with the first light-emitting member 211 in a plan view or bottom view, and a third portion P3, P3' that overlaps with the second light-emitting members 212, 213 in a plan view or bottom view, and the second region RE2 includes a second portion P2 that overlaps with the first light-receiving member 221 in a plan view or bottom view, and a fourth portion P4 that overlaps with the second light-receiving member 222 in a plan view or bottom view.

[0054] A partition member 262 is positioned between the first light-receiving member 221 and the second light-receiving member 222 to separate them.

[0055] The first light-emitting member 211 and the second light-emitting members 212 and 213 can be operated at different timings, and the second light-receiving member 222 can detect the intensity ratio of the red and infrared reflected light, namely the second light L2 and the third light L3. By measuring in this way, which combines the green first light L1, the red second light L2, and the infrared third light L3, it becomes possible to measure not only pulse rate but also blood oxygen saturation.

[0056] Figures 15 and 16 are bottom views illustrating the contact state of the target OB with the lens member 27 or the contact detection unit 24. The contact detection member 24a corresponding to the lens member 27 that the target OB is in contact with, i.e., the contact detection member 24a that is detecting contact, is indicated by dot pattern hatching. In Figure 15, region GR1 shows the state in which the target OB is in contact with the entire lens member 27, region GR2 shows the state in which the target OB is in contact with the left half (-X side) of the lens member 27, and region GR3 shows the state in which the target OB is in contact with a portion of the lens member 27 that extends wider to the right than the left half (-X side). In Figure 16, region HR1 shows the state in which the target OB is in contact with a portion slightly wider than the upper half (+Y side) of the lens member 27, region HR2 shows the state in which the target OB is in contact with a portion slightly narrower than the upper half (+Y side) of the lens member 27, and region HR3 shows the state in which the target OB is in contact with the central part of the lens member 27.

[0057] Referring to region GR1 shown in Figure 15, the contact detection member 24a constituting the contact detection unit 24 is provided in a first region RE1 facing the first light-emitting member 211 and a second region RE2 facing the first light-receiving member 221.

[0058] In the contact detection unit 24 or lens member 27, the first region RE1 includes first portions 241a, 241b (corresponding to the first portion P1 in Figure 13) that overlap with the green first light-emitting member 211 in a plan view or bottom view, third portions 243a, 243b (corresponding to the third portion P3 in Figure 13) that overlap with the red second light-emitting member 212 in a plan view or bottom view, and third portions 245a, 245b (corresponding to the third portion P3' in Figure 13) that overlap with the infrared second light-emitting member 213 in a plan view or bottom view. In the contact detection unit 24 or lens member 27, the second region RE2 includes a second portion 242a (corresponding to the second portion P2 in Figure 13) that overlaps with the first light-receiving member 221 for green in a plan view or a bottom view, and a fourth portion 244a (corresponding to the fourth portion P4 in Figure 13) that overlaps with the second light-receiving member 222 for red and infrared in a plan view or a bottom view.

[0059] In the state shown in region GR2 of Figure 15, the control circuit device 30, which is the control unit CT shown in Figure 2, determines that both the second part 242a closer to the first parts 241a and 241b, and the fourth part 244a further from the first parts 241a and 241b, are in a non-contact state. In this case, the control circuit device 30 corrects the light receiving sensitivity of the first light receiving member 221 to the first light L1 so that it is higher than the light receiving sensitivity of the first light receiving member 221 to the first light L1 when the second part 242a is determined to be in contact. The control circuit device 30 also corrects the light receiving sensitivity of the second light receiving member 222 to the second light L2 and third light L3 so that it is higher than the light receiving sensitivity of the second light receiving member 222 to the second light L2 and third light L3 when the fourth part 244a is determined to be in contact.

[0060] In the state shown in region GR3 of Figure 15, the control circuit device 30 determines that of the second portion 242a and the fourth portion 244a, the second portion 242a closer to the first portions 241a and 241b is in contact, and the fourth portion 244a further from the first portions 241a and 241b is not in contact. In this case, the control circuit device 30 does not correct the light receiving sensitivity of the first light receiving member 221 for the first light L1. On the other hand, the control circuit device 30 corrects the light receiving sensitivity of the second light receiving member 222 for the second light L2 and the third light L3 so that it is higher than the light receiving sensitivity of the second light receiving member 222 for the second light L2 and the third light L3 when the fourth portion 244a is determined to be in contact.

[0061] In the state shown in region HR1 of Figure 16, the control circuit device 30 determines that the first parts 241a and 241b are in contact and does not correct the intensity of the first light L1 emitted by the first light-emitting member 211. The control circuit device 30 also determines that the third parts 243a and 243b are in contact and does not correct the intensity of the second light L2 emitted by the second light-emitting member 212. On the other hand, the control circuit device 30 determines that the third parts 245a and 245b are not in contact and corrects the intensity of the third light L3 emitted by the third light-emitting member 213 to be higher than the intensity of the third light L3 emitted by the second light-emitting member 213 when it is determined that the element 245a closer to the second part 242a is in contact.

[0062] In the state shown in region HR1 of Figure 16, the control circuit device 30 determines that the second portion 242a and the fourth portion 244a are partially in a non-contact state on the -Y side or lower side. In this case, the control circuit device 30 corrects the light receiving sensitivity of the first light receiving member 221 to the first light L1 to be higher than the light receiving sensitivity of the first light receiving member 221 to the first light L1 when the second portion 242a is determined to be in contact as a whole, in proportion to the proportion of the non-contact state. The control circuit device 30 also corrects the light receiving sensitivity of the second light receiving member 222 to the second light L2 and third light L3 to be higher than the light receiving sensitivity of the second light receiving member 222 to the second light L2 and third light L3 when the fourth portion 244a is determined to be in contact as a whole, in proportion to the proportion of the non-contact state.

[0063] In the state shown in region HR2 of Figure 16, the control circuit device 30 determines that the third parts 243a and 243b are in contact and does not correct the intensity of the second light L2 emitted by the second light-emitting member 212. On the other hand, the control circuit device 30 determines that the first parts 241a and 241b are not in contact and corrects the intensity of the first light L1 emitted by the first light-emitting member 211 to be higher than the intensity of the first light L1 emitted by the first light-emitting member 211 when it is determined that the element 241a closer to the second part 242a is in contact. Furthermore, the control circuit device 30 determines that the third parts 245a and 245b are in a non-contact state and corrects the intensity of the third light L3 emitted by the third light-emitting member 213 to be higher than the intensity of the third light L3 emitted by the second light-emitting member 213 when it is determined that the element 245a closer to the second part 242a is in contact.

[0064] In the state shown in region HR2 of Figure 16, the control circuit device 30 determines that the second portion 242a and the fourth portion 244a are in partial contact on the +Y side or upper side. In this case, the control circuit device 30 corrects the light receiving sensitivity of the first light receiving member 221 to the first light L1 to be higher than the light receiving sensitivity of the first light receiving member 221 to the first light L1 when the second portion 242a is determined to be in contact as a whole, in proportion to the proportion of the non-contact state. The control circuit device 30 also corrects the light receiving sensitivity of the second light receiving member 222 to the second light L2 and third light L3 to be higher than the light receiving sensitivity of the second light receiving member 222 to the second light L2 and third light L3 when the fourth portion 244a is determined to be in contact as a whole, in proportion to the proportion of the non-contact state.

[0065] In the state shown in region HR3 of Figure 16, the control circuit device 30 indicates that the lens member 27 and the target OB are in contact with the central part of the lens member 27. In this case, similar to the state shown in region GR3 of Figure 15, the control circuit device 30 does not correct the light receiving sensitivity of the first light receiving member 221 for the first light L1, but corrects the light receiving sensitivity of the second light receiving member 222 for the second light L2 and the third light L3.

[0066] In the arrangement example shown in Figure 13, the position and width of the second portion P2 and the first light-receiving member 221 are approximately the same with respect to the X direction, and the position and width of the fourth portion P4 and the second light-receiving member 222 are approximately the same. However, similar to the first portion P1 on the light-emitting side, the second portion P2 and the fourth portion P4 on the light-receiving side may also be provided spanning multiple contact detection members 24a with respect to the X direction.

[0067] [Third Embodiment] The third embodiment of the biological information measuring device will now be described. Note that the third embodiment of the biological information measuring device is a partial modification of the first embodiment of the biological information measuring device.

[0068] Figures 17 and 18 are bottom views illustrating the biological information measuring device of the third embodiment. In Figure 17, region IR1 shows the state in which the target OB is in contact with the entire lens member 27, and region IR2 shows the state in which the target OB is in contact with the left half (-X side) of the lens member 27. In Figure 18, region JR1 shows the state in which the target OB is in contact with the upper half (+Y side) of the lens member 27, and region JR2 shows the state in which the target OB is in contact with the central part of the lens member 27.

[0069] In the third embodiment, in the contact detection unit 24 or lens member 27, the first portion P1 of the first region RE1 does not have a contact detection member 24a. The contact detection member 24a is formed of a transparent electrode or the like, but tends to reduce the transmittance of the first light L1. By not providing the contact detection member 24a in the first portion P1, the first light L1 from the first light-emitting member 211 can be prevented from being blocked by the contact detection member 24a. Also, in the third embodiment, in the contact detection unit 24 or lens member 27, the second portion P2 of the second region RE2 does not have a contact detection member 24a. This prevents the first light L1 incident on the first light-receiving member 221 from being blocked by the contact detection member 24a.

[0070] In the third embodiment as well, the contact detection unit 24 can measure body movement information. Although the contact state in the first portion P1 and the second portion P2 cannot be directly detected, the intensity of the first light L1 emitted by the first light-emitting member 211 can be corrected from the state of the contact detection members 24a arranged around the first portion P1 and the second portion P2, and the light-receiving sensitivity of the first light-receiving member 221 to the first light L1 can be corrected.

[0071] [Fourth Embodiment] The fourth embodiment of the biological information measuring device will now be described. Note that the fourth embodiment of the biological information measuring device is a modified version of the first and second embodiments.

[0072] Figure 19 is a bottom view illustrating the fourth embodiment of the biological information measuring device. In Figure 19, region KR1 shows the arrangement of the contact detection unit 24 applied to the type of photodetector 20a shown in Figure 3 of the first embodiment. In Figure 19, region KR2 shows the arrangement of the contact detection unit 24 applied to the type of photodetector 20a shown in Figure 13 of the second embodiment.

[0073] In the case of the contact detection unit 24 shown in Figure 19, a single contact detection member 24a is provided in the center of the lens member 27. In this case, the structure of the contact detection unit 24 can be simplified. However, it only detects whether or not there is contact with the single contact detection member 24a, and it is not possible to determine the direction of body movement.

[0074] Figure 20 is a bottom view illustrating a modified bio-information measuring device. In Figure 20, region LR1 shows the arrangement of the contact detection unit 24 applied to the type of photodetector 20a shown in Figure 3 of the first embodiment, and region LR2 shows the arrangement of the contact detection unit 24 applied to the type of photodetector 20a shown in Figure 13 of the second embodiment.

[0075] In the case of the contact detection unit 24 shown in Figure 20, four contact detection members 24a are arranged around the lens member 27 at four equally spaced angles. In this case, even though the contact detection unit 24 is simple, it can detect the tilt of the light detection unit 20a in the ±X direction and the tilt in the ±Y direction, and thus determine the direction of body movement.

[0076] Figure 21 is a bottom view illustrating another modified example of a bio-information measuring device. In Figure 21, region MR1 shows the arrangement of the contact detection unit 24 applied to the type of photodetector 20a shown in Figure 3 of the first embodiment, and region MR2 shows the arrangement of the contact detection unit 24 applied to the type of photodetector 20a shown in Figure 13 of the second embodiment.

[0077] In the case of the contact detection unit 24 shown in region MR1 of Figure 21, contact detection members 24a are provided at the center of the lens member 27, around the lens member 27, and in an annular position surrounding the first light-emitting member 211 and the first light-receiving member 221 that constitute the light detection unit 20a. In particular, the contact detection member 24f can be used to detect the contact state of the contact detection unit 24 caused by rotation around the Y axis or tilting in the X direction, and can be used to determine whether a correction equivalent to the correction explained using Figures 11 and 12 is necessary. The contact detection member 24g can be used to determine whether the outside of the first light-emitting member 211 and the first light-receiving member 221 are in contact.

[0078] In the case of the contact detection unit 24 shown in region MR2 of Figure 21, contact detection members 24a are provided at the center of the lens member 27, around the lens member 27, and in an annular position surrounding the first light-emitting member 211 and the first light-receiving member 221 that constitute the light detection unit 20a. The functions of the contact detection members 24f and 24g are the same as in the case of the contact detection unit 24 shown in region MR1 of Figure 21.

[0079] [Variations and other variations] Although the present invention has been described in reference to the embodiments described above, the present invention is not limited to the embodiments described above, and can be implemented in various forms without departing from the spirit thereof, for example, the following modifications are also possible.

[0080] The biometric information measuring device 100 is not limited to a wristwatch-like wearable device that measures pulse rate, etc., but can also be applied to smartwatches, activity trackers, and other devices with a variety of functions.

[0081] The biometric information measuring device 100 is not limited to one worn on the wrist; it can be any device in which the sensor device 20 is in close contact with any part of the body.

[0082] In a specific embodiment, the biological information measuring device comprises a biological information detection device and a contact detection unit that detects contact with an object. The biological information detection device includes a first light-emitting member that emits first light toward the object, a first light-receiving member that receives first light from the object, and a control unit that acquires biological information of the object based on the first light received by the first light-receiving member. The contact detection unit is provided on the detection unit side of the biological information detection device where the first light-emitting member and the first light-receiving member are provided, and the control unit determines the contact state with the object based on the detection value of the contact detection unit.

[0083] In the above-described biological information measuring device, a contact detection unit provided on the detection unit side of the body information detection device detects contact with the target, and the control unit determines the contact state with the target based on the detected value of the contact detection unit. Therefore, it is possible to determine the contact state caused by the movement of the target living organism or body without using an acceleration sensor that is affected by temperature such as the body temperature of the target.

[0084] In specific terms, the control unit controls the first light-receiving member and the first light-emitting member according to the determined contact state. In other words, it can correct the detection operation of the biological information detection device according to the contact state detected by the contact detection unit.

[0085] In specific terms, the contact detection unit has multiple contact detection members, each of which transmits a detection signal to the control unit when it comes into contact with the target, and the control unit determines that the target and the biometric information measuring device are in contact by receiving detection signals from each of the multiple contact detection members. In this case, the contact state between the target and the biometric information measuring device can be determined at multiple locations based on the signals from each of the multiple contact detection members.

[0086] In specific aspects, the system includes a lens member that transmits first light toward the target and transmits first light from the target toward the first light-receiving member, and multiple contact detection members are provided on the lens member. In this case, the contact state between the target and the biological information measuring device can be determined based on the lens member.

[0087] In specific aspects, the multiple contact detection members are provided in a first region including a first portion overlapping with the first light-emitting member and a second region including a second portion overlapping with the first light-receiving member. The control unit controls the first light-emitting member and the first light-receiving member according to the contact state between the first region and the second region. The light emission intensity of the first light-emitting member can be corrected according to the contact state on the first light-emitting member side, or the light-receiving sensitivity of the first light-receiving member can be corrected according to the contact state on the first light-receiving member side, thereby improving the detection accuracy of the biological information detection device.

[0088] In specific aspects, the control unit corrects the light-receiving sensitivity of the first light-receiving member to the first light when the first portion of the first region is in contact and at least a portion of the second portion of the second region is not in contact, so that it is higher than the light-receiving sensitivity of the first light-receiving member to the first light when the second portion of the second region is in contact. This allows the light-receiving sensitivity of the first light-receiving member to be corrected according to the degree of contact on the first light-receiving member side.

[0089] In specific terms, when the control unit determines that the entire second portion of the second region is in a non-contact state, it corrects the light-receiving sensitivity of the first light-receiving member to the first light so that it is higher than the light-receiving sensitivity of the first light-receiving member when it determines that only a portion of the second portion of the second region is in a non-contact state. This allows the light-receiving sensitivity to be corrected so that it is higher when the entire region is in a non-contact state than when only a portion is in a non-contact state.

[0090] In specific aspects, when the control unit determines that the side of the second portion of the second region closer to the first portion of the first region is in a non-contact state and the side of the second portion of the second region further from the first portion of the first region is in contact, it corrects the light receiving sensitivity of the first light receiving member to be higher than the light receiving sensitivity of the first light receiving member when it is determined that the far side is in a non-contact state and the near side is in contact. This allows for correction to be performed according to the contact state and light receiving distribution.

[0091] In specific terms, the control unit does not correct the light receiving sensitivity of the first light receiving member to the first light if it determines that the side of the second portion of the second region that is farther from the first portion of the first region is in a non-contact state, and the side of the second portion of the second region that is closer to the first portion of the first region is in a contact state. By not performing the correction, the processing load can be reduced when the intensity of the first light received by the first light receiving member is unlikely to be affected.

[0092] In specific aspects, the control unit corrects the intensity of the first light emitted by the first light-emitting member to be higher than the intensity of the first light emitted by the first light-emitting member when the first part of the first region is in contact and at least a part of the first part of the first region is not in contact. By increasing the intensity of the first light when the first light-emitting member is in contact, i.e., when the first light is not in contact and difficult to reach the target, it is possible to make it easier for the light to reach the target, thereby improving the detection accuracy of the biometric information detection device.

[0093] In specific terms, the control unit, when it determines that the entire first portion of the first region is in a non-contact state, corrects the intensity of the first light emitted by the first light-emitting member so that it is higher than the intensity of the first light emitted by the first light-emitting member when it determines that only a portion of the first portion of the first region is in a non-contact state. This allows the light emission intensity to be corrected so that it is higher when the entire region is in a non-contact state than when only a portion is in a non-contact state.

[0094] In specific aspects, when the control unit determines that the side of the first portion of the first region closer to the second portion of the second region is in a non-contact state and the side of the first portion of the first region further from the second portion of the second region is in contact, it corrects the intensity of the first light emitted by the first light-emitting member to be higher than the intensity of the first light emitted by the first light-emitting member when it is determined that the far side is in a non-contact state and the near side is in contact. This allows for corrections to be made in accordance with the contact state and the light emission distribution.

[0095] In specific terms, the control unit does not correct the intensity of the first light emitted by the first light-emitting member if it determines that the side of the first portion of the first region that is farther from the second portion of the second region is in a non-contact state, and the side of the first portion of the first region that is close to the second portion of the second region is in a contact state. By not performing the correction, the processing load can be reduced when the first light-emitting member is in a state where it is unlikely to have any effect on the intensity of the first light that reaches the first light-receiving member.

[0096] In specific aspects, the control unit determines the noise component contained in the signal corresponding to the first light received by the first light-receiving member based on the change in the contact state between the first and second regions, and acquires the target biological information from the signal from which the noise component has been removed from the signal corresponding to the first light. Noise components applied to the biological information detection device can be determined and removed according to the contact state.

[0097] In specific aspects, the lens member does not have a contact detection member in the first portion of the first region. This ensures that the first light from the first light-emitting member is not blocked by the contact detection member.

[0098] In specific aspects, the lens member does not have a contact detection member in the second portion of the second region. This prevents the first light incident on the first light receiving member from being blocked by the contact detection member.

[0099] In specific aspects, the device comprises a second light-emitting member that emits second light in a longer wavelength band than the first light, and a second light-receiving member that receives the second light. The first region of the lens member includes a third portion that overlaps with the second light-emitting member, and the second region of the lens member includes a fourth portion that overlaps with the second light-receiving member. The control unit controls the second light-emitting member and the second light-receiving member according to the contact state between the third portion and the fourth portion. Control according to the contact state can also be performed when there are multiple light-emitting members and light-receiving members.

[0100] In specific aspects, the fourth portion in the second region is further from the first region than the second portion. The control unit corrects the second light-receiving member's sensitivity to the second light when the first region is in contact and the fourth portion in the second region is not in contact, and does not correct the first light-receiving member's sensitivity to the first light. By increasing the light-receiving sensitivity of the second light-receiving member when the second light-receiving member, which is farther from the light-emitting part, is in a non-contact state, and not correcting the light-receiving sensitivity of the first light-receiving member, which has less influence, the amount of light received by each light-receiving member can be controlled with high precision.

[0101] In specific terms, the control unit corrects the first intensity of the second light emitted by the second light-emitting member when the third portion of the first region is in a non-contact state, so that it is higher than the intensity of the first light emitted by the first light-emitting member when the third portion of the first region is in a non-contact state. By increasing the intensity of the second light when the third portion is non-contact, it is made easier for the light to reach the target. [Explanation of Symbols]

[0102] 20...Sensor device, 20a...Light detection unit, 211...First light-emitting member, 221...First light-receiving member, 212,213...Second light-emitting member, 222...Second light-receiving member, 24...Contact detection unit, 24a...Contact detection member, 24f,24g...Contact detection member, 25...Circuit board, 25u...Top surface, 261,262...Partition wall member, 27...Lens member, 27a...Outer surface, 27b...Inner surface, 27p...Outer frame member, 27w...Window member, 30...Control circuit device, 40...Battery, 50...Display, 70...Case, 70o...Opening, 70w...Window member, 100...Biometric information measuring device, 10A...Biometric information detection device, 10B...Contact detection device, 100a...Main unit, 100b ...wristband, 241a,241b,243a,243b,245a,245b...elements, 242a,244a...elements, 261,262...partition members, P1(241a,241b)...first part, P2(242a)...second part, P3(243a,243b)...third part, P3'(245a,245b)...third part, P42(244a)...fourth part, CT...control unit, D1...light distribution, D2...receiving distribution, DL...irradiated light, HB...biological tissue, IC1...component, IC2...component, LC1...component, LC2...component, OB...target, RE1...first region, RE2...second region, S1,S2...space, SF1,SF2...reference plane, SL...reflected light

Claims

1. A biological information detection device, It includes a contact detection unit that detects contact with an object, The aforementioned biological information detection device is A first light-emitting member that emits a first light toward the target, A first light-receiving member that receives the first light from the target, The system includes a control unit that acquires biological information of a target based on the first light received by the first light receiving member, The contact detection unit is provided on the detection unit side of the biological information detection device where the first light-emitting member and the first light-receiving member are provided. The control unit determines the contact state with the target based on the detected value of the contact detection unit, and is a biological information measuring device.

2. The biological information measuring device according to claim 1, wherein the control unit controls the first light-receiving member and the first light-emitting member according to the determined contact state.

3. The contact detection unit has a plurality of contact detection members, Each of the plurality of contact detection members transmits a detection signal to the control unit when it comes into contact with the target. The biological information measuring device according to claim 2, wherein the control unit determines that the target and the biological information detection device are in contact by receiving the detection signal from each of the plurality of contact detection members.

4. The device comprises a lens member that transmits the first light toward the target and transmits the first light from the target toward the first light-receiving member, The biological information measuring device according to claim 3, wherein the plurality of contact detection members are provided on the lens member.

5. The plurality of contact detection members are provided in a first region including a first portion that overlaps with the first light-emitting member, and a second region including a second portion that overlaps with the first light-receiving member. The biological information measuring device according to claim 4, wherein the control unit controls the first light-emitting member and the first light-receiving member according to the contact state between the first region and the second region.

6. The biological information measuring device according to claim 5, wherein the control unit corrects the light receiving sensitivity of the first light receiving member to the first light when at least a part of the second portion of the second region is in a non-contact state, so that it is higher than the light receiving sensitivity of the first light receiving member to the first light when the second portion of the second region is in contact state.

7. The biological information measuring device according to claim 6, wherein the control unit determines that the entire second portion of the second region is in a non-contact state, and corrects the light receiving sensitivity of the first light receiving member to the first light to be higher than the light receiving sensitivity of the first light receiving member to the first light when it determines that one portion of the second portion of the second region is in a non-contact state.

8. The biological information measuring device according to claim 7, wherein the control unit determines that the side of the second portion of the second region closer to the first portion of the first region is in a non-contact state and the side of the second portion of the second region far from the first portion of the first region is in contact state, corrects the light receiving sensitivity of the first light receiving member to the first light to be higher than the light receiving sensitivity of the first light receiving member when it is determined that the far side is in a non-contact state and the near side is in contact state.

9. The biological information measuring device according to claim 8, wherein the control unit determines that the side of the second portion of the second region that is farther from the first portion of the first region is in a non-contact state and the side of the second portion of the second region that is close to the first portion of the first region is in a contact state, and the control unit does not correct the light receiving sensitivity of the first light receiving member to the first light.

10. The biological information measuring device according to claim 5, wherein the control unit corrects the intensity of the first light emitted by the first light-emitting member to be higher than the intensity of the first light emitted by the first light-emitting member when at least a part of the first portion of the first region is in a non-contact state.

11. The biological information measuring device according to claim 10, wherein the control unit determines that the entire first portion of the first region is in a non-contact state, and corrects the intensity of the first light emitted by the first light-emitting member to be higher than the intensity of the first light emitted by the first light-emitting member when it is determined that only a portion of the first portion of the first region is in a non-contact state.

12. The biological information measuring device according to claim 11, wherein the control unit determines that the side of the first portion of the first region closer to the second portion of the second region is in a non-contact state and the side of the first portion of the first region far from the second portion of the second region is in contact, corrects the intensity of the first light emitted by the first light-emitting member to be higher than the intensity of the first light emitted by the first light-emitting member when it is determined that the far side is in a non-contact state and the near side is in contact.

13. The biological information measuring device according to claim 12, wherein the control unit determines that the side of the first portion of the first region that is farther from the second portion of the second region is in a non-contact state and the side of the first portion of the first region that is close to the second portion of the second region is in a contact state, and the control unit does not correct the intensity of the first light emitted by the first light-emitting member.

14. The biological information measuring device according to claim 5, wherein the control unit determines a noise component contained in the signal corresponding to the first light received by the first light receiving member based on a change in the contact state between the first region and the second region, and obtains the target biological information from the signal obtained by removing the noise component from the signal corresponding to the first light.

15. The biological information measuring device according to claim 5, wherein the contact detection member is not provided in the first portion of the first region of the lens member.

16. The biological information measuring device according to claim 15, wherein the contact detection member is not provided in the second portion of the second region of the lens member.

17. The device comprises a second light-emitting member that emits second light in a longer wavelength band than the first light, and a second light-receiving member that receives the second light, The first region of the lens member includes a third portion that overlaps with the second light-emitting member. The second region of the lens member includes a fourth portion that overlaps with the second light-receiving member. The biological information measuring device according to claim 5, wherein the control unit controls the second light-emitting member and the second light-receiving member according to the contact state between the third part and the fourth part.

18. In the second region, the fourth portion is further from the first region than the second portion. The biological information measuring device according to claim 17, wherein the control unit corrects the light receiving sensitivity of the second light of the second light receiving member to be higher when the first region is in contact and the fourth portion in the second region is not in contact, and does not correct the light receiving sensitivity of the first light of the first light receiving member.

19. The biological information measuring device according to claim 18, wherein the control unit corrects the first intensity of the second light emitted by the second light-emitting member when the third portion of the first region is in a non-contact state to be higher than the intensity of the first light emitted by the first light-emitting member when the third portion of the first region is in a non-contact state.

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