Apparatus for estimating biological information and sensor for measuring multiple signals

Abstract

Provided are a device for estimating biological information and a sensor for measuring a plurality of signals. The device for estimating biological information can include a sensor configured to detect a first light signal and a second light signal from an object of a user, and a processor configured to determine whether a condition for estimating biological information is satisfied based on the detected first light signal, and estimate biological information based on the second light signal, wherein the sensor includes a force sensor configured to measure a force applied to the object when the object is in contact with a cover surface of the sensor.

Description

[0001] This application claims priority to Korean Patent Application No. 10-2020-0137683, filed on October 22, 2020, with the Korean Intellectual Property Office, and Korean Patent Application No. 10-2021-0033535, filed on March 15, 2021, the entire disclosure of which is incorporated herein by reference. Technical Field

[0002] The apparatus and methods consistent with the example embodiments relate to estimating biological information and sensors for measuring multiple signals to estimate biological information. Background Technology

[0003] With advancements in medicine and increased life expectancy, interest in healthcare has grown. Furthermore, interest in medical devices / devices has expanded from medium to small-sized medical and healthcare devices that can be kept at home or carried by individuals to large medical devices that can be utilized by hospitals and testing facilities. Medical devices for measuring biometrics can include both invasive and non-invasive devices. Using non-invasive devices, biometrics can be detected in a relatively simple manner without causing pain to the subject; however, the accuracy of the measurements is low, and various studies have been conducted to overcome this drawback. Summary of the Invention

[0004] According to one aspect of an example embodiment, an apparatus for estimating biometric information is provided, the apparatus comprising: a sensor configured to detect a first light signal and a second light signal reflected or scattered from a body part of a user; and a processor configured to: determine, based on the first light signal, whether a condition for estimating biometric information is met, and, in response to the biometric information being met, estimate the biometric information based on the second light signal, wherein the sensor may include: a cover surface configured to contact the body part; a first light emitter disposed on a first substrate and configured to emit first light onto the body part; a second light emitter disposed on a second substrate and configured to emit second light, the second substrate being configured to be closer to the cover surface than the first substrate; a photosensor configured to: detect the first light signal from the first light emitted to and subsequently scattered or reflected from the body part, and detect the second light signal from the second light emitted to and subsequently scattered or reflected from the body part; and a force sensor configured to: measure the force applied to the body part when the body part contacts the cover surface.

[0005] The processor may also be configured to: acquire a contact image of a body part based on a first optical signal, determine a contact state of the body part based on the contact image or at least one of the forces measured by a force sensor, and determine whether conditions for estimating biological information are met based on the determined contact state.

[0006] If the condition is determined to be unmet, the processor can also be configured to guide the user to adjust the contact state.

[0007] The processor can also be configured to: drive the first light emitter when the body part is in contact with the cover surface, and turn off the first light emitter and turn on the second light emitter when the contact state meets the conditions for bio-information estimation.

[0008] When the second optical signal is received by the photodetector, the processor can also be configured to determine whether the conditions for estimating biological information are met based on the signal-to-noise ratio (SNR) of the received second optical signal.

[0009] If the condition is determined to be unmet, the processor can also be configured to drive the second optical transmitter to reacquire the second optical signal.

[0010] When a body part comes into contact with the cover surface and the force is measured by a force sensor, the processor can also be configured to determine the type of biological information to be estimated based on the measured force.

[0011] The processor can also be configured to control at least one of the wavelength, current intensity, or duration of the second light emitter according to the driving conditions of the second light emitter corresponding to the type of determined biological information.

[0012] The device may further include: a display configured to display a first graphic object and a second graphic object, the first graphic object representing a reference force for each of a plurality of different types of biological information, and the second graphic object representing the force measured by a force sensor.

[0013] The processor can also be configured to provide the user with a list of multiple different types of biological information and to control the second light emitter according to the driving conditions of the second light emitter corresponding to the type of biological information selected by the user from the list.

[0014] The device may further include: a display configured to display a first graphic object and a second graphic object, the first graphic object representing the various types of biological information, and the second graphic object representing reference for a selected type of biological information.

[0015] Bioinformation can be at least one of heart rate, oxygen saturation, respiratory rate, triglycerides, blood pressure, or antioxidant index.

[0016] According to one aspect of another example embodiment, an apparatus for estimating biometric information is provided, the apparatus comprising: a sensor configured to detect a first light signal and a second light signal reflected or scattered from a body part of a user; and a processor configured to: determine, based on the first light signal, whether a condition for estimating biometric information is met, and, in response to the biometric information being met, estimate the biometric information based on the second light signal, wherein the sensor may include: a cover surface configured to contact the body part; a first light emitter disposed on a first surface of a substrate and configured to emit first light to a reflector; a second light emitter disposed on a second surface of the substrate and configured to emit second light to the body part; a reflector disposed in a direction opposite to the cover surface relative to the substrate and configured to reflect the first light emitted from the first light emitter toward the body part; a photosensor configured to: detect the first light signal from the first light emitted to and subsequently scattered or reflected from the body part, and detect the second light signal from the second light emitted to and subsequently scattered or reflected from the body part; and a force sensor configured to: measure a force applied to the body part when the body part contacts the cover surface.

[0017] The device may further include: a spacer configured to block the first light emitted from the first light emitter from directly propagating to the photodetector.

[0018] The processor may also be configured to: acquire a contact image of a body part based on a first optical signal, determine a contact state of the body part based on the contact image or at least one of the forces measured by a force sensor, and determine whether conditions for estimating biological information are met based on the determined contact state.

[0019] If the condition is determined to be unmet, the processor can also be configured to guide the user to adjust the contact state.

[0020] When the second optical signal is received by the photodetector, the processor can also be configured to determine whether the conditions for estimating biological information are met based on the signal-to-noise ratio (SNR) of the received second optical signal.

[0021] If the condition is determined to be unmet, the processor can also be configured to drive the second optical transmitter to reacquire the second optical signal.

[0022] When a body part comes into contact with the cover surface and the force is measured by a force sensor, the processor can also be configured to determine the type of biological information to be estimated based on the measured force.

[0023] According to one aspect of another example embodiment, a sensor for measuring multiple signals is provided, the sensor comprising: a cover surface configured to contact an object; a first light emitter disposed on a first substrate and configured to emit first light onto the object; a second light emitter disposed on a second substrate and configured to emit second light onto the object; a second substrate configured to be closer to the cover surface than the first substrate; a photodetector configured to detect a first optical signal from the first light emitted onto the object and subsequently scattered or reflected from the object, and to detect a second optical signal based on the second light emitted onto the object and subsequently scattered or reflected from the object; and a force sensor configured to measure the force applied to the object when the object contacts the cover surface.

[0024] The first and second rays have different wavelengths.

[0025] The sensor may further include a concentrator configured to converge first and second light scattered or reflected from the object in a direction toward the photodetector.

[0026] The second substrate may include a transmission region at the center of the second substrate to guide first and second light scattered or reflected from the object to a light detector, and the second light emitter may include a plurality of light sources arranged along the outer periphery of the transmission region.

[0027] According to one aspect of another example embodiment, a sensor for measuring multiple signals is provided, the sensor comprising: a cover surface configured to contact an object; a first light emitter disposed on a first surface of a substrate and configured to emit first light to a reflector; a second light emitter disposed on a second surface of the substrate and configured to emit second light to the object; a reflector disposed in a direction opposite to the cover surface relative to the substrate and configured to reflect the first light emitted from the first light emitter toward the object; a photodetector configured to detect a first optical signal from the first light emitted to the object and subsequently scattered or reflected from the object, and to detect a second optical signal from the second light emitted to the object and subsequently scattered or reflected from the object; and a force sensor configured to measure the force applied to the object when the object is in contact with the cover surface.

[0028] The sensor may further include a spacer configured to block the first light emitted from the first light emitter from directly propagating to the photodetector.

[0029] According to one aspect of another example embodiment, an apparatus for estimating bioinformation is provided, the apparatus comprising: an optical sensor configured to detect an optical signal from light emitted to and subsequently reflected or scattered from an object; a memory storing a plurality of different target forces corresponding to a plurality of different bioinformation types; a force sensor configured to measure an external force applied to the apparatus; and a processor configured to: identify a bioinformation type selected from the plurality of different bioinformation types; provide guidance for adjusting the external force to a target force among the plurality of different target forces corresponding to the identified bioinformation type; and estimate bioinformation having the identified bioinformation type based on the external force corresponding to the target force, according to the optical signal. Attached Figure Description

[0030] The above and / or other aspects will become clearer by describing specific example embodiments with reference to the accompanying drawings, in which:

[0031] Figure 1 This is a block diagram illustrating a device for estimating biological information according to an exemplary embodiment;

[0032] Figure 2 This is a block diagram illustrating a device for estimating biological information according to another exemplary embodiment;

[0033] Figure 3A , Figure 3B and Figure 4A , Figure 4B This is a diagram used to explain the structure of the sensor according to an exemplary embodiment;

[0034] Figure 5A and Figure 5B This is an illustration of an example of a screen that outputs a guide map to the user to adjust the touch state;

[0035] Figure 5C The diagram shows graphical objects related to reference force and actual contact force for each of the various types of biological information.

[0036] Figure 5D It is a diagram showing a list of various biological information provided to the user;

[0037] Figure 5E Graphical objects related to the reference force selected by the user for biological information and graphical objects related to the actual contact force are displayed;

[0038] Figure 6 This is a flowchart illustrating a method for estimating biological information according to an exemplary embodiment;

[0039] Figure 7A This is a diagram illustrating an electronic device according to an exemplary embodiment; and

[0040] Figure 7B This is a diagram showing the structure of a sensor embedded in an electronic device. Detailed Implementation

[0041] The following describes an exemplary embodiment in more detail with reference to the accompanying drawings.

[0042] In the following description, the same reference numerals are used for the same elements, even in different figures. Things defined in the description (such as detailed constructions and elements) are provided to aid in a comprehensive understanding of the exemplary embodiments. However, it is clear that the exemplary embodiments can be practiced without those specifically defined things. Furthermore, well-known functions or structures may not be described in detail because unnecessary detail would obscure the description.

[0043] It will be understood that although the terms first, second, etc., may be used herein to describe various elements, these elements should not be limited by these terms. These terms are used only to distinguish one element from another. Furthermore, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. In the specification, unless explicitly stated to the contrary, the words “comprising” and their variations will be understood to indicate that the stated elements are included, but do not exclude any other elements. Terms such as “unit” and “module” mean a unit that performs at least one function or operation, and “unit” and “module” can be implemented using hardware, software, or a combination of hardware and software.

[0044] When a phrase such as "at least one of..." follows a column of elements, it modifies the entire column, not a single element within the column. For example, the phrase "at least one of a, b, and c" should be understood as: including only a, including only b, including only c, including both a and b, including both a and c, including both b and c, including all of a, b, and c, or various variations of the above examples.

[0045] While terms such as "first" and "second" can be used to describe various components, such components should not be limited by these terms. These terms are only used to distinguish one component from another.

[0046] Figure 1 This is a block diagram illustrating a device for estimating biological information according to an exemplary embodiment. (Refer to...) Figure 1 The device 100 for estimating biological information includes a sensor 110 and a processor 120.

[0047] Sensor 110 can detect a first optical signal and a second optical signal from an object belonging to a user. Specifically, the object can be a part of the human body (e.g., a distal body part with high-density blood vessels, such as fingers, toes, etc.) or an area of ​​the wrist adjacent to the radial artery or an upper area of ​​the wrist through which capillary or venous blood flows). Sensor 110 may include an optical sensor and a force sensor. The optical sensor may include a first light emitter and a second light emitter, the first light emitter being configured to emit first light onto the object and the second light emitter being configured to emit second light onto the object. The first light emitter and the second light emitter may include, but are not limited to, at least one of one or more light-emitting diodes (LEDs), laser diodes, and phosphors. The first light emitted by the first light emitter and the second light emitted by the second light emitter may have different wavelengths.

[0048] Furthermore, the optical sensor may also include a photodetector configured to detect light scattered or reflected from the object. The photodetector can detect a first optical signal when first light emitted from a first light emitter is scattered or reflected from the object, and can also detect a second optical signal when second light emitted from a second light emitter is scattered or reflected from the object. The photodetector may include a photodiode, a phototransistor (PTr), or an image sensor (e.g., a complementary metal-oxide-semiconductor (CMOS) image sensor or a charge-coupled device (CCD) image sensor).

[0049] A force sensor measures the force applied to an object when it comes into contact with a cover surface. To induce a change in the magnitude of a pulse wave, the force sensor can measure the force applied to the object as the user gradually increases or decreases pressing force when a finger contacts the cover surface of the sensor. For example, the force sensor may include a strain gauge, but is not limited to this. Alternatively, the force sensor may be configured as an array of force sensors. Sensor 110 may also include an area sensor, and the contact pressure can be obtained based on the force and contact area obtained by the force sensor and the area sensor.

[0050] Figures 3A to 4B This is a diagram used to explain the structure of a sensor according to an exemplary embodiment. (Refer to...) Figures 3A to 4B describe Figure 1 The structure of sensor 110 is shown in the figure.

[0051] Reference Figure 3AThe sensor 110 may include a cover surface 310 that will contact an object, a first base 320 disposed on the lower part of the cover surface 310, and a second base 330 disposed between the cover surface 310 and the first base 320. A first light emitter 325 may be disposed on the first base 320, and a second light emitter 335 may be disposed on the second base 330. As shown, the second base 330 on which the second light emitter 335 is disposed may be positioned relatively closer to the cover surface 310 than the first base 320, such that the second light emitter 335 is positioned closer to the cover surface 310 than the first base 320.

[0052] The cover surface 310 may include a first transmission region 311, which is configured to allow first light emitted from the first light emitter 325 to be directed at an object.

[0053] The cover surface 310 may include a second transmission region 312, which is formed to allow second light emitted from the second light emitter 335 to travel toward the object. The second transmission region 312 may have a rectangular shape as shown, but its shape is not limited to this, allowing it to be formed in various shapes (such as circular, elliptical, or other polygonal shapes). Alternatively, the second transmission region 312 may be sealed with a cover made of a transparent material (such as glass or plastic) to allow light to pass through. In this case, each of the plurality of second transmission regions 312 may be sealed with a separate cover, or a single integral cover may be formed to seal all six second transmission regions 312. Figure 3A In the diagram, the second transmission region 312 is shown as including six second transmission regions, but the number of second transmission regions is not limited to this and can vary without limitation.

[0054] The cover surface 310 may include a third transmission region 313, which guides first and second light scattered or reflected from the object to be directed to a photodetector.

[0055] The remaining area of ​​the cover surface 310, excluding the first transmission area 311, the second transmission area 312 and the third transmission area 313, can be a non-transmission area.

[0056] exist Figure 3A In this embodiment, the cover surface 310 is shown as having the same circular shape as the second base 330, but this disclosure is not limited thereto, such that the shape of the cover surface 310 may differ from the shape of the second base 330. For example, the region within a predetermined radius from the center of the cover surface may be horizontal, and the outer region beyond the radius may have a cross-section whose height gradually decreases with increasing distance from the center.

[0057] A first light emitter 325 is disposed on a first substrate 320. First light emitted by the first light emitter 325 can pass through a first transmission region 311 of the cover surface 310 to reach an object. The first light emitter 325 may include multiple light sources as shown. Figure 3A In the diagram, the first light emitter 325 is shown to include four light sources, but the number of light sources is not limited to this and can be varied without limitation.

[0058] As described above, the first light emitter 325 can be configured to be further away from the cover surface than the second light emitter 335. Therefore, the first light emitted by the first light emitter 325 has a longer optical path than the second light emitted by the second light emitter 335. In this case, the first light can be emitted to the object in the form of scattered light.

[0059] Additionally, the first substrate 320 may include a fourth transmission region 321, which is configured to allow first and second light scattered or reflected from the object to pass through in a direction toward the photodetector.

[0060] In another example, the first substrate 320 may be omitted. The first light emitter 325 may be disposed on the same surface as the second light emitter 335 of the second substrate 330, and the cover surface 310 may also include a separate transmission region, allowing the first light emitter to emit light onto the object through the separate transmission region. The sensor 110 may also include a prism disposed in the optical path of the first light and a scattering component containing an optical film. The first light emitted from the first light emitter 325 may propagate to the object as scattered light through the scattering component.

[0061] A second light emitter 335 is disposed on the second substrate 330. Second light emitted by the second light emitter 335 can pass through the second transmission region 312 of the cover surface 310 to reach the object. The second light emitter 335 may include a plurality of light sources arranged along the outer periphery of the fifth transmission region 331. Figure 3A In the diagram, the second light emitter 335 is shown to include six light sources, but the number of light sources is not limited to this and can be varied without limitation.

[0062] The second substrate 330 may include a fifth transmission region 331 at its center, such that the first light emitted from the first light emitter 325 passes through in the direction toward the object. Additionally, the fifth transmission region 331 can guide the first and second light scattered or reflected from the object toward the photodetector 360.

[0063] Reference Figure 3AThe third transmission region 313 of the cover surface 310, the fourth transmission region 321 of the first substrate 320, and the fifth transmission region 331 of the second substrate 330 are shown as circular shapes of the same size. However, this disclosure is not limited thereto, such that the third transmission region 313, the fourth transmission region 321, and the fifth transmission region 331 may each have different sizes and / or shapes from each other.

[0064] The sensor 110 may also include a concentrator 350 that converges first and second light scattered or reflected from the object in a direction toward the photodetector 360. As shown, the concentrator 350 may be disposed between the first substrate 320 and the photodetector 360.

[0065] As shown, the photodetector 360 may be positioned below the condenser 350. The photodetector 360 may include a photodiode, a phototransistor (PTr), or an image sensor (e.g., a CMOS image sensor or a CCD image sensor).

[0066] Force sensor 370 may be disposed below photodetector 360. However, this disclosure is not limited thereto, such that force sensor 370 may be disposed between cover surface 310 and second substrate 330, or between first substrate 320 and second substrate 330.

[0067] Reference Figure 3B ,and Figure 3A Unlike other shapes, the cover surface 310, the first base 320, and the second base 330 are shown as rectangular rather than circular. The shapes of the cover surface 310, the first base 320, and the second base 330 are not limited to this, and the cover surface 310, the first base 320, and the second base 330 can be formed in various shapes (such as triangles, pentagons, etc.).

[0068] In addition, with Figure 3A and Figure 3B The cover surface 310, the first base 320, and the second base 330 may each have different shapes and sizes. For example, the second base 330 may be formed in a rectangular shape, and the cover surface may be formed in a circular shape.

[0069] Figure 4A This is for explaining according to another exemplary embodiment. Figure 1 A diagram illustrating the structure of sensor 110. (Refer to...) Figure 4AThe sensor 110 may include a cover surface 410, a substrate 420, a first light emitter 430, a second light emitter 440, and a reflector 450. The cover surface 410 will contact the object. The substrate 420 is disposed below the cover surface 410. The first light emitter 430 is disposed on one surface of the substrate 420 (e.g., the surface opposite to the cover surface 410) and configured to emit first light to the reflector 450. The second light emitter 440 is disposed on another surface of the substrate 420 (e.g., the surface facing the cover surface 410) and configured to emit second light to the object. The reflector 450 is configured to reflect the first light emitted from the first light emitter 430 in a direction toward the object. In this case, the reflector 450 may be disposed in a direction opposite to the substrate 420 and the cover surface 410.

[0070] Sensor 110 may also include a partition wall 460 that blocks the first light emitted from the first light emitter 430 from directly pointing towards the photodetector 480. Figure 4A In the present disclosure, the spacer 460 is shown as having a cylindrical shape extending from the support surface 485 on which the photodetector 480 is disposed to the cover surface 410, but the present disclosure is not limited thereto, such that the spacer 460 may be formed in polygonal shapes including triangles and rectangles.

[0071] The cover surface 410 may include a first transmission region 411, which is configured to allow first light emitted from a first light emitter 430 disposed on the substrate 420 and scattered from a reflector 450 to be directed toward an object.

[0072] The cover surface 410 may include a second transmissive region 412, which is formed to allow second light emitted from the second light emitter 440 to propagate toward the object. The second transmissive region 412 may have a rectangular shape as shown, but its shape is not limited to this, allowing it to be formed in various shapes (such as polygonal shapes other than circular shapes, elliptical shapes, and rectangular shapes). Alternatively, the second transmissive region 412 may be sealed with a cover made of a transparent material (such as glass or plastic) to allow light to pass through. In this case, each of the plurality of second transmissive regions 412 may be sealed with a separate cover, or a single integral cover may be formed to seal all four second transmissive regions 412. Figure 4A In the diagram, the second transmission region 412 is shown as including four second transmission regions, but the number of second transmission regions is not limited to this and can vary without limitation.

[0073] The cover surface 410 may include a third transmission region 413, which guides first and second light scattered or reflected from the object to be directed to the photodetector 480. As shown, the third transmission region 413 may represent a space surrounded by a spacer wall 460.

[0074] The substrate 420 may be disposed below the cover surface 410, and the first light emitter 430 and the second light emitter 440 may be disposed on the substrate 420. In this case, the first light emitter 430 may be disposed on one surface of the substrate 420, and the second light emitter 440 may be disposed on the other surface of the substrate 420.

[0075] Figure 4A The base 420 is shown as having the same circular shape as the cover surface 410, but this disclosure is not limited thereto, such that the shape of the base 420 may differ from the shape of the cover surface 410. Additionally, Figure 4A and Figure 4B The cover surface 410 and the base 420 are shown to have circular shapes, but the present disclosure is not limited thereto, such that the cover surface 410 and the base 420 can be formed in various shapes (such as polygonal shapes including triangles and rectangles).

[0076] The substrate 420 may include a fourth transmission region 421, which is configured to allow first light reflected from the reflector 450 to be directed toward an object. A spacer wall 460 may extend through the center of the fourth transmission region 421. In this configuration, first and second light scattered or reflected from the object can be directed toward the photodetector 480 through the interior space of the spacer wall in the transmission region.

[0077] As shown, a first light emitter 430 may be disposed on a surface of the substrate 420 and emit first light to the reflector 450. In this case, a surface of the substrate may be a surface in a direction opposite to the cover surface 410 (i.e., a surface further away from the cover surface 410). As shown, the first light emitter 430 may include multiple light sources. Figure 4A In this embodiment, the first light emitter 430 includes two light sources, but the number of light sources is not limited to this and can be varied without limitation.

[0078] Reflector 450 can be disposed on support surface 485 in a direction opposite to the cover surface of substrate 420, and can reflect the first light emitted from first light emitter 430 toward the object. Reflector 450 can reflect the first light emitted from first light emitter 430 toward fourth transmission region 421 of substrate 420, so that the first light can be emitted in a direction toward the object. Therefore, the first light emitted by first light emitter 430 has a longer optical path than the second light emitted by second light emitter 440, and can therefore be emitted to the object in the form of scattered light.

[0079] A second light emitter 440 may be disposed on another surface of the substrate 420 and emit second light onto the object. In this case, the other surface of the substrate 420 may be a surface located in the direction of the cover surface 410 (i.e., a surface closer to the cover surface 410). As shown, the second light emitter 440 may include multiple light sources. Figure 4A In the second light emitter 440, there are four light sources, but the number of light sources is not limited to this and can be varied without limitation.

[0080] The sensor may also include a concentrator 470 that converges first and second light scattered or reflected from the object in a direction toward the photodetector 480.

[0081] The sensor may include a photodetector 480 configured to detect a first light signal scattered or reflected from the object based on a first light and a second light signal scattered or reflected from the object based on a second light, and the sensor may also include a force sensor 490 configured to measure the force applied to the object when the object comes into contact with the cover surface 410.

[0082] As shown, a photodetector 480 may be disposed on a support surface 485 located below the condenser 470. The photodetector 480 may include a photodiode, a phototransistor (PTr), or an image sensor (e.g., a CMOS image sensor or a CCD image sensor).

[0083] exist Figure 4A In the diagram, reflector 450 and photodetector 480 are shown disposed on the same support surface 485, but reflector 450 may be disposed on a different support surface than the support surface on which photodetector 480 is disposed. For example, the support surface on which reflector 450 is disposed may be closer to the cover surface than the support surface on which photodetector 480 is disposed.

[0084] Force sensor 490 may be disposed below photodetector 480. However, this disclosure is not limited thereto, such that force sensor 490 may be disposed between cover surface 410 and substrate 420.

[0085] Reference Figure 4B ,and Figure 4A In contrast, the sensor may include a first reflector 451 and a second reflector 452. The first reflector 451 is disposed in a direction opposite to the substrate 420 and the cover surface 410 and is configured to reflect first light emitted from the first light emitter 430 toward the second reflector 452. The second reflector 452 is configured to reflect the first light reflected from the first reflector 451 toward the object.

[0086] The first reflector 451 reflects the first light emitted from the first light emitter 430 toward the second reflector 452, and the second reflector 452 reflects the first light reflected from the first reflector 451 toward the object. The second reflector 452 also reflects the first light reflected from the first reflector 451 toward the fourth transmission region 421 of the substrate 420, so that the first light can be emitted in a direction toward the object. Therefore, the first light emitted by the first light emitter 430 has a longer optical path than the second light emitted by the second light emitter 440, and thus can be emitted toward the object in the form of scattered light.

[0087] In this configuration, the first reflector 451 and the second reflector 452 can be disposed on the support surface 485 in a direction opposite to the base 420 and the cover surface 410. Additionally, as... Figure 4B As shown, the first reflector 451 and the second reflector 452 may be disposed on the same support surface 485 with parallel heights, but this disclosure is not limited thereto, such that the first reflector 451 and the second reflector 452 may be disposed on different support surfaces and have different heights.

[0088] Return to reference Figure 1 The processor 120 is included in the device 100 for estimating biological information.

[0089] Processor 120 can be connected to sensor 110 electrically, mechanically, or via wired / wireless communication. Processor 120 can control a first light emitter, a second light emitter, and a force sensor. For example, when a request to estimate biological information is received according to user manipulation and an object comes into contact with the cover surface of sensor 110, processor 120 can control the light intensity, the duration of the light, and the on / off state of the first light emitter. Additionally, processor 120 can control the power supply to the force sensor.

[0090] Processor 120 can receive and process measured data from a first light emitter, a second light emitter, and a force sensor. Upon receiving a first optical signal and a second optical signal from sensor 110, processor 120 can perform preprocessing on the first and second optical signals (such as filtering for noise removal, amplification of the first and second optical signals, or conversion to digital signals). For example, processor 120 can perform bandpass filtering on the second optical signal received from sensor 110 using a bandpass filter with a preset passband (e.g., from 0.4 Hz to 10 Hz) to remove noise from the second optical signal. Furthermore, processor 120 can perform correction by reconstructing the second optical signal based on a Fast Fourier Transform. However, this disclosure is not limited thereto, and various types of preprocessing can be performed depending on various measurement environments (such as the computational performance or measurement accuracy of the device, the purpose of bioinformatics estimation, the user's measurement site, the temperature and humidity of the object, the temperature of the sensor, etc.).

[0091] The processor 120 can estimate biological information based on a first optical signal and a second optical signal detected by the sensor 110. In this case, the biological information may include at least one of heart rate, oxygen saturation, respiratory rate, triglycerides, blood pressure, arterial stiffness, skin age, vascular age, blood glucose, electrolytes, carotenoids, body water, protein, alcohol, and antioxidant index. However, the biological information is not limited to these.

[0092] For reference Figures 3A to 4B As the first light emitter is farther from the cover surface than the second light emitter, or because the first light is reflected by a reflector, the first light has a longer optical path than the second light. Therefore, the first light is emitted to the object as scattered light. In this case, the processor 120 can determine whether the condition is met based on the first light signal detected by the sensor 110, and can estimate bio-information based on the second light signal.

[0093] The processor 120 can determine whether a condition is met based on at least one of a first optical signal detected by the sensor 110 and a measured force. For example, the processor 120 can obtain a contact image of the object based on the first optical signal, and determine the contact state of the object based on at least one of the obtained contact image and the measured force. Specifically, the processor 120 can determine whether a condition is met based on the determined contact state.

[0094] For example, the processor 120 may obtain a contact image based on the intensity of the received first light signal, image data, fingerprint data, etc., and determine a contact state based on the obtained contact image, including at least one of whether the object is in contact and the contact position. For example, the processor 120 may extract feature points (e.g., the center point of a fingerprint) from the obtained contact image, and determine whether the contact state is normal by detecting whether the extracted feature points are outside a predetermined range.

[0095] In another example, the contact state of an object can be determined based on whether the measured contact force value exceeds or falls below a threshold, the measurement time of the contact force, and whether the contact force exceeding a predefined threshold is measured for a threshold period or longer. For example, the contact state of an object can be determined to be normal when at least one of the following conditions is met: the measured contact force value is within a threshold range, the force is measured for a threshold period or longer, and the force gradually increases over time. Such conditions for determination can be predefined in various ways.

[0096] The processor 120 can determine whether conditions for estimating biometric information are met based on a determined contact state. For example, the processor 120 can determine that conditions for estimating biometric information are met when the center point of the fingerprint extracted from the acquired contact image does not exceed a predetermined range and the value of the contact force is measured within a threshold time period within a threshold range.

[0097] When the processor 120 determines that the conditions for estimating biological information are not met based on the determined contact state, it can guide the user to adjust the contact state.

[0098] For example, when it is determined based on the obtained contact image that the conditions for estimating biological information are not met, the processor 120 may present a graphic object representing, for example, a finger and a graphic object representing a cover surface on the display to induce normal contact between the object (e.g., a fingertip) and the cover surface. In this case, a text object for inducing normal contact between the object and the cover surface may be included.

[0099] In another example, when the conditions for estimating biological information based on the measured force are not met, the processor 120 can guide the user to adjust the contact state by providing guidance information about the contact force. (See also...) Figure 5A and Figure 5B This describes the process of providing the user with guidance information about contact force. Figure 5A and Figure 5B This is an example diagram showing a screen that outputs a guide map to the user to adjust the touch state.

[0100] For example, Figure 5A The screen shows the initial state of the initial contact force adjusted by the finger during measurement. Figure 5BThe screen shows the result after the initial contact force falls within the normal range.

[0101] Reference Figure 5A The processor 120 can display a graphical object F representing a predefined reference contact force on the display. a and F b And graphical objects 510 and 511 representing the actual contact force received from the force sensor.

[0102] For example, as shown, the lower limit F of the graphic object representing the reference contact force. a and upper limit F b These can include lines, continuous points, circles, ellipses, polygons, etc. Similarly, the graphic objects 510 and 511 representing the actual contact force can include circles, ellipses, polygons, crosses, arrows, etc.

[0103] Reference Figure 5A The processor 120 can display the lower limit F of a graphical object representing the reference contact force in the horizontal direction on the display screen during the initial stage of measurement. a and upper limit F b Additionally, when the initial contact force received from the force sensor is below the lower limit F... a and upper limit F b Other than (e.g., when the initial contact force is less than the lower limit F of the reference contact force). a When, or when the initial contact force is not measured, the graphical object 510 for the actual contact force can be used in the lower limit object F. a The image below is displayed.

[0104] Additionally, when the actual contact force enters the normal range due to the user adjusting the pressure of the sensor with his / her finger, the graphic object 511 for the actual contact force can be placed in the upper limit object F. b With lower bound object F a The position corresponding to the actual contact force is displayed. In this case, the graphic object 510 for the actual contact force can be displayed as if the graphic object 510 moves along a trajectory from the initial position (corresponding to the position of graphic object 510) to the final position (corresponding to the position of graphic object 511), so that the change in the actual contact force can be shown. In one embodiment, while the position of the graphic object 510 is continuously updated according to the change in the actual contact force, the trajectory from the initial position to the current position can be displayed on the display screen.

[0105] In addition, graphic objects 510 used for actual contact force outside the normal range and graphic objects 511 used for actual contact force within the normal range can be distinguished from each other by different shapes or colors, thereby allowing users to easily identify them.

[0106] Reference Figure 5BWhen the actual contact force falls within the normal range in the initial stage of measurement, the processor 120 can represent as follows: Figure 5A The graphical object F of the horizontally arranged reference contact force shown. a and F b The shape is changed to a gradually upward curve, allowing the user to gradually increase the pressure of their finger over time. In this way, the graphical object F representing the reference contact force... a and F b The direction can be changed to upward or downward depending on the change in the reference contact force during the period of bioinformation measurement.

[0107] When the processor 120 determines that the conditions for estimating biological information are met based on the received first light signal and / or contact force, the processor 120 may turn off the first light emitter and turn on the second light emitter. For example, the processor 120 may activate the first light emitter when the object is in contact with the cover surface.

[0108] When the second light signal is received by the sensor 110, the processor 120 can estimate biological information based on the received second light signal.

[0109] The processor 120 can also determine whether conditions for estimating biological information are met based on the received second optical signal, and can estimate the biological information based on the determination result. In this case, the processor 120 can determine whether conditions for estimating biological information are met based on at least one of the light intensity and signal-to-noise ratio (SNR) of the received second optical signal. For example, the processor 120 can calculate the SNR of the received second optical signal, and can determine that the conditions are met only if the calculated SNR exceeds an allowable threshold.

[0110] When it is determined that the conditions used to estimate biological information are not met, the processor 120 can reacquire the second light signal by driving the second light emitter.

[0111] When certain conditions are met, the processor 120 can use the second optical signal to estimate biological information. For example, features can be extracted from the received second optical signal, and the extracted features can be applied to a predetermined bioinformation estimation model for estimating biological information. Specifically, features may include amplitude values ​​at the maximum or minimum points of the second optical signal, force / pressure and time, time and amplitude corresponding to local minimum / local maximum points of the first and second differential signal waveforms of the second optical signal, partial or entire regions of the second optical signal waveform, or combinations thereof. However, features are not limited to these. The bioinformation estimation model can be defined as various linear or nonlinear combination functions (such as addition, subtraction, division, multiplication, logarithmic, regression equations, etc.) without specific limitations.

[0112] In another example, processor 120 may obtain an oscilloscope envelope based on a received second optical signal and a measured force, and extract features from the obtained oscilloscope envelope. For example, the amplitude value at the maximum peak point, the contact pressure value at the maximum peak point, and the contact pressure values ​​at the right and left points in the oscilloscope envelope may be obtained as features for blood pressure estimation, wherein the contact pressure values ​​at the right and left points are symmetrically distant from the contact pressure value at the maximum peak point and have a preset peak ratio in the range of 0.5 to 0.7. When obtaining features, processor 120 may estimate blood pressure by applying a predefined blood pressure estimation model to the features.

[0113] Simultaneously, the processor 120 can determine the biological information to be estimated from various biological information sources based on the contact force measured by the force sensor. (See reference...) Figure 5C The description describes the processing of biological information to be estimated based on the determination of contact force based on measurements. Figure 5C Graphical objects 531 and 532 are shown for each of a variety of biological information (e.g., various different types of biological information) related to a reference force (e.g., a target force) and a graphic object related to the actual contact force. Storage device 210 can store reference forces corresponding to various biological information. For example, a first reference force range from F1 to F2, a second reference force range from F2 to F3, a third reference force range from F3 to F4, and a fifth reference force range from F4 to F5 can be stored in storage device 210 as target forces for obtaining heart rate information, triglyceride information, oxygen saturation information, and antioxidant index information, respectively.

[0114] When a request for estimating biological information is received, the processor 120 may output, before or after determining, as described above, whether the conditions for estimating biological information are met. Figure 5C The diagram shown illustrates a reference force used to guide various biological information. For example, when the contact state of an object is determined to be normal or meets a preset contact quality based on the obtained contact image, the processor 120 can output, as shown in the diagram. Figure 5C The diagram shown illustrates that the biological information to be estimated can be determined from a variety of biological information based on the measured contact force.

[0115] As shown, processor 120 can display a first graphical object 530 representing a reference force for each of a variety of biometric information. Additionally, when the actual contact force is measured in real time by a force sensor, processor 120 can display a second graphical object 531 or 532 representing the measured contact force on the display. In this case, the reference force for each of the various biometric information can be predefined. The reference force 530 for each biometric information can be a fixed value defined for multiple users and can be received in advance from an external device. Optionally, the reference force 530 for each biometric information can be adjusted by processor 120 for each user. For example, the reference force can be calibrated based on user characteristic information (such as the user's health status, age, gender, etc.) or existing measurement data (e.g., each user's measurement space, measurement time point, user's fingerprint data, contact area of ​​each user's object, etc.).

[0116] For example, processor 120 can determine the type of bio-information to be estimated and can identify the reference force that the actual contact force should reach to estimate the bio-information. In this case, the bio-information in the corresponding portion can be identified as the bio-information to be estimated only when the actual contact force is measured in a particular portion for a threshold period or longer, or only when the contact force gradually increases over time in a particular portion.

[0117] For example, refer to Figure 5C When the actual contact force measured by the force sensor is in portion D (F3 to F4), the processor 120 can output a graphical object 532 representing the actual contact force on the corresponding portion D, and determine the oxygen saturation corresponding to portion D as the biological information to be estimated. In this case, the processor can determine that the biological information to be measured is oxygen saturation only when the contact force is measured in portion D (F3 to F4) for a threshold period or longer, or only when the contact force gradually increases over time in portion D (F3 to F4).

[0118] When the actual contact force measured by the force sensor is not measured for a threshold period or longer in any of the following segments: B (F1 to F2), C (F2 to F3), D (F3 to F4), and E (F4 to F5), or when the contact force does not gradually increase over time in any of these segments, the processor can determine that motion noise has occurred. In this case, the processor can request the user to remeasure the biometric information, or guide the user to gradually increase the force over a period longer than the threshold within any of the segments B, C, D, and E.

[0119] As another example, when the actual contact force measured by the force sensor is in part A (0 to F1), a second graphic object 531 representing the actual contact force can be displayed on part A. At this time, since there is no bio-information that can be estimated, the user can be guided to increase the contact force.

[0120] Figure 5D It is a diagram showing a list of various biological information provided to the user. Figure 5E Graphical objects related to the reference force selected by the user for biological information and graphical objects related to the actual contact force are displayed.

[0121] Reference Figure 1 , Figure 5D and Figure 5E The processor 120 can provide the user with a list of various biological information (e.g., a list of various different types of biological information) and determine that the biological information selected by the user is the biological information to be estimated.

[0122] For example, upon receiving a request for estimating biological information, processor 120 can, as... Figure 5D The list 540 of estimable biological information shown is output to the display.

[0123] When the user selects oxygen saturation from the list of biological information 540 output to the display, the processor 120 can determine that the oxygen saturation selected by the user is the biological information to be estimated, and can output as follows: Figure 5E The diagram shows oxygen saturation. In this case, the reference strength for each of the various biological information can be predefined, and the reference strength has been referenced... Figure 5C It has been described in detail, so it is omitted here.

[0124] As shown, the processor 120 displays a graphical object 550 on the output diagram representing a reference force for an oxygen saturation level selected by the user, and when the actual contact force is measured by a force sensor, the processor 120 can output a graphical object 551 representing the measured actual contact force.

[0125] Reference Figure 5EAs can be seen, the user's actual contact force is less than the reference force for oxygen saturation (part D (F3 to F4)), which is biometric information selected by the user. The processor can guide the user to apply a force corresponding to the reference force for the biometric information to be estimated. For example, as shown, arrows guiding the user to move the position of the actual contact force to the position of the reference force, or text graphic objects 552 encouraging the user to apply further force (such as "Keep it up," "Increase the force," or "Press harder") can be output. Optionally, the graphic object 551 representing the actual contact force can be displayed in a unique shape (e.g., a star, a triangle, etc.), or can be displayed using colors easily recognizable by the user (e.g., red), line thickness, etc. In another example, the user's actual contact force and the reference force for oxygen saturation can be displayed numerically to indicate how much more force the user should apply.

[0126] The processor 120 can control at least one of the wavelength, current intensity, and duration of the second light emitter based on the biological information to be estimated, which is determined based on the measured contact force or the driving conditions of the second light emitter corresponding to the biological information selected by the user.

[0127] Figure 2 This is a block diagram illustrating a device for estimating biological information according to another exemplary embodiment.

[0128] Reference Figure 2 The device 200 for estimating biological information may include a sensor 110, a processor 120, a storage device 210, an output interface 220, and a communication interface 230. (See reference...) Figure 1 , Figures 3A to 4B , Figure 5A and Figure 5B The sensor 110 and processor 120 are described in detail, therefore a non-redundant configuration will be described below.

[0129] Storage device 210 may store reference information for bioinformatics estimation and processing results from sensor 110 and / or processor 120. In this case, the reference information may include user information (such as the user's age, gender, and health status), normal contact conditions (such as the contact position of a finger), driving conditions of the light source, reference contact force, or bioinformatics estimation model. However, the reference information is not limited to this.

[0130] In this case, storage device 210 may include at least one type of storage medium, such as flash memory, hard disk, multimedia card micro, card-type memory (e.g., SD memory or XD memory), random access memory (RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic storage, magnetic disk, and optical disk, but not limited thereto.

[0131] The output interface 220 can display a graphical object related to the contact state, including contact position and contact force, on a monitor. Additionally, when an estimated biometric value is obtained, the output interface 220 can visually display the estimated biometric value on the monitor. In this case, if the result of the biometric estimation falls outside the normal range, an alarm / warning message can be visually output. Alternatively, a non-visual output device (such as a voice device or a haptic device) can be used to output warning messages regarding the contact state, contact force, and estimated biometric value.

[0132] The communication interface 230, under the control of the processor 120, can communicate with external devices to send and receive various data related to bioinformatics estimation. For example, the communication interface 230 can send the processing results of the processor 120 to the external device, and allow the external device to manage the user's bioinformatics history, monitor the user's health status, and output the monitoring results of the bioinformatics history and health status. In this case, the external device includes smartphones, tablet PCs, desktop PCs, laptop PCs, etc., and may include, but is not limited to, devices used in medical institutions that include cuff-type blood pressure measurement devices.

[0133] In another example, communication interface 230 can receive bioinformatics estimation models, user characteristic information, etc., required for bioinformatics estimation from external devices. The received information can be stored in storage device 210.

[0134] In this configuration, the communication interface 230 can communicate with external devices using Bluetooth, Bluetooth Low Energy (BLE), Near Field Communication (NFC), Wireless Local Area Network (WLAN), ZigBee, Infrared Data Association (IrDA), Wi-Fi Direct (WFD), Ultra Wideband (UWB), Ant+, Wi-Fi, Radio Frequency Identification (RFID), 3G, 4G, and / or 5G. However, these are merely examples, and embodiments are not limited thereto.

[0135] Figure 6 This is a flowchart illustrating a method for estimating biological information according to an exemplary embodiment. Figure 6 The method can be from Figure 1 and Figure 2 An exemplary embodiment of a bioinformation estimation method performed by devices 100 and 200 for estimating bioinformation is provided below. The method will be briefly described below to avoid redundancy.

[0136] First, in operation 610, a first light signal is detected by emitting a first light onto the object, and in operation 620, the force between the object and the cover surface of the sensor can be measured.

[0137] Then, in operation 630, it can be determined whether the conditions for estimating biological information are met based on the detected first light signal and the measured force. Specifically, a contact image of the object can be obtained based on the detected first light signal, and the contact state of the object can be determined based on at least one of the obtained contact image and the force measured by the force sensor. Whether the conditions for estimating biological information are met can be determined based on the determined contact state.

[0138] When it is determined in operation 640 that the conditions for estimating biological information are not met, the first light signal is re-detected in operation 610 by emitting the first light onto the object, and the force between the object and the cover surface can be measured again in operation 620.

[0139] When it is determined in operation 640 that the conditions for estimating biological information are met, the second light signal can be detected in operation 650 by emitting second light onto the object by a second light emitter.

[0140] Subsequently, in operation 660, it can be determined whether the conditions for estimating biological information are met based on the detected second light signal. At this time, it can be determined whether the conditions for estimating biological information are met based on the SNR of the detected second light signal.

[0141] If it is determined in operation 670 that the conditions for estimating biological information are not met, the second light signal can be re-detected in operation 650 by emitting second light onto the object by a second light emitter.

[0142] When it is determined in operation 670 that the conditions for estimating biological information are met, biological information can be estimated in operation 680.

[0143] Figure 7A An electronic device according to an exemplary embodiment is shown. The electronic device 700 according to the embodiment may be a smartwatch or a smart wristband-type wearable device. However, the implementation of the electronic device 700 is not limited thereto, and may be a mobile device (such as a smartphone or tablet PC).

[0144] Reference Figure 7A The electronic device 700 may include a body 710 and a belt 720.

[0145] The body 710 may include modules for performing general functions of the electronic device 700 and a sensor 730 for estimating biological information. A battery may be embedded in the body 710 or the strap 720 to power the various modules. The strap 720 may be connected to the body 710. The strap 720 may be flexible to bend around a user's wrist. The strap 720 may include a first strap and a second strap separate from the first strap. One end of the first and second straps may be connected to each end of the body 710, and the first and second straps may be fastened to each other using fastening devices formed on their opposite sides. In this case, the fastening device may be formed as a Velcro fastener, a pin fastener, etc., but is not limited thereto. Alternatively, the strap 720 may be formed as an integrated piece (e.g., a ring that is not divided into multiple parts).

[0146] The display 740 may be disposed on the top surface of the main body 710 to visually display various types of information. The display 740 may include a touch screen panel capable of receiving touch input from a user.

[0147] Sensor 730 may have a reference Figures 1 to 4B The sensor's structure and function are described, and it can be mounted as a button on one side of the main body 710. As described above, the sensor 730 can detect a first light signal and a second light signal from an object from the user, and when the object comes into contact with the sensor 730, the sensor 730 can obtain information about the force applied by the object. Furthermore, the sensor 730 can perform user interaction functions for general functions of controlling the electronic device 700 (e.g., application selection / execution, adjustment of the graphical user interface (GUI) of the display 740, etc.).

[0148] Figure 7B This is a diagram showing the structure of a sensor 730 embedded in an electronic device.

[0149] Reference Figure 7B The sensor 730 may include a housing 750. Furthermore, the sensor 730 may include a first light emitter 752, a second light emitter 753, a condenser 754, a photodetector 755, and a force sensor 756, which are disposed inside or in the lower part of the housing 750.

[0150] A portion of the housing 750 may be exposed to the outside in the form of a button via a side of the body 710. The housing 750 may include a cover surface 751 that will contact fingers placed thereon. For example, a support 760 within the body 710 may also support the housing 750 on at least one of its periphery and lower portion. Figure 7BIn the example embodiment, the support 760 is shown as a housing 750 surrounding the interior of the body 710, but this is merely an example. Although in Figure 7B It is not shown in the figure, but additional structures for preventing the housing 750 from falling off the body 710 may be further included in the housing 750 or inside the body 710.

[0151] While not limited thereto, the exemplary embodiments can be implemented as computer-readable code on a computer-readable recording medium. A computer-readable recording medium is any data storage device capable of storing data that can later be read by a computer system. Examples of computer-readable recording media include read-only memory (ROM), random access memory (RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage devices. The computer-readable recording medium can also be distributed across a networked computer system, such that the computer-readable code is stored and executed in a distributed manner. Furthermore, the exemplary embodiments can be written as computer programs transmitted via a computer-readable transmission medium (such as a carrier wave) and received and implemented in a general-purpose digital computer or special-purpose digital computer executing the program. Moreover, it is understood that in the exemplary embodiments, one or more units of the above-described devices and apparatus may include circuit systems, processors, microprocessors, etc., and are capable of executing computer programs stored on computer-readable media.

[0152] The foregoing exemplary embodiments are merely illustrative and are not to be construed as limiting. This teaching can be readily applied to other types of devices. Furthermore, the description of the exemplary embodiments is intended to be illustrative and not to limit the scope of the claims; many alternatives, modifications, and variations will be apparent to those skilled in the art.

Claims

1. An apparatus for estimating biological information, comprising: The sensor is configured to detect a first light signal and a second light signal reflected or scattered from a part of the user's body; and The processor is configured to: determine whether a condition for estimating biological information is met based on a first optical signal, and, in response to the condition being met, estimate the biological information based on a second optical signal. The sensors include: The cover surface is configured to contact body parts; A first light emitter is disposed on a first substrate and configured to emit first light to a body part; A second light emitter is disposed on a second substrate and configured to emit a second light, wherein the second substrate is positioned closer to the cover surface than the first substrate. A photodetector is configured to: detect a first optical signal from first light emitted to and subsequently scattered or reflected from the body part, and detect a second optical signal from second light emitted to and subsequently scattered or reflected from the body part; and A force sensor is configured to measure the force applied to a body part when the body part comes into contact with the cover surface. The processor is also configured to: provide the user with a list of multiple different types of biometric information, and control the second light emitter according to the driving conditions of the second light emitter corresponding to the type of biometric information selected by the user from the list. The processor is further configured to: acquire a contact image of a body part based on a first optical signal; determine a contact state of the body part based on the contact image and at least one of the forces measured by a force sensor; and determine whether conditions for estimating biological information are met based on the determined contact state. When the second optical signal is received by the photodetector, the processor is further configured to determine whether the conditions for estimating biological information are met based on at least one of the signal-to-noise ratio and light intensity of the received second optical signal.

2. The device according to claim 1, wherein, If the condition is determined to be unmet, the processor is also configured to guide the user to adjust the contact state.

3. The device according to claim 1, wherein, The processor is also configured to: drive the first light emitter when the body part contacts the cover surface, and turn off the first light emitter and turn on the second light emitter when the contact state meets the conditions for bio-information estimation.

4. The device according to claim 1, wherein, If the condition is determined to be unmet, the processor is further configured to drive the second optical transmitter to reacquire the second optical signal.

5. The device according to claim 1, wherein, When a body part comes into contact with the cover surface and the force is measured by a force sensor, the processor is also configured to determine the type of biological information to be estimated based on the measured force.

6. The device according to claim 5, wherein, The processor is also configured to control at least one of the wavelength, current intensity, and duration of the second light emitter according to the driving conditions of the second light emitter corresponding to the type of determined biological information.

7. The device according to claim 5, further comprising: The display is configured to display a first graphic object and a second graphic object, the first graphic object representing a reference force for each of a variety of different types of biological information, and the second graphic object representing the force measured by a force sensor.

8. The device according to claim 1, further comprising: The display is configured to display a first graphic object and a second graphic object, the first graphic object representing the various types of biological information, and the second graphic object representing a reference force for a selected type of biological information.

9. The device according to any one of claims 1 to 7, wherein, Bioinformation includes at least one of the following: heart rate, oxygen saturation, respiratory rate, triglycerides, blood pressure, arterial stiffness, skin age, vascular age, blood glucose, electrolytes, carotenoids, body water, protein, alcohol, and antioxidant index.

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