Wearable device and awakening state control system

Abstract

A wearable device worn by a user includes a main body, and a plurality of stimulators located in the main body that apply stimulations of different types or different intensities to the user based on biological information of the user.

Description

Technical Field

[0001] Embodiments of the present disclosure relate to wearable devices and an arousal state control system. Background Art

[0002] The autonomic nervous system is a nervous system that regulates autonomic functions such as breathing, digestion, circulation, and body temperature maintenance. The balance between the sympathetic nerve and the parasympathetic nerve maintains the autonomic nervous system. The sympathetic nerve becomes active during arousal, while the parasympathetic nerve becomes active during relaxation. Although a high level of arousal improves attention, an excessively high level of arousal reduces performance due to excessive stress. This relationship between arousal and performance is called the Yerkes-Dodson law.

[0003] According to the Yerkes-Dodson law, in a graph with the horizontal axis representing the arousal level and the vertical axis representing performance, the arousal level and performance have an inverted U-shaped correlation. This curve has a range of arousal levels suitable for maximizing performance, outside of which performance decreases.

[0004] A stress suppression system that measures biological information of a user such as body temperature and heart rate and induces a healing effect through image, music, tactile stimulation, etc. has been proposed (for example, refer to Patent Document 1). A neck beauty device that provides electrical stimulation or iontophoresis to the neck to achieve a beauty effect has been proposed (for example, refer to Patent Document 2).

[0005] Citation List

[0006] Patent Documents

[0007] [Patent Document 1] Japanese Unexamined Patent Application Publication No. 2020-202971

[0008] [Patent Document 2] Japanese Unexamined Patent Application Publication No. 2021-108906 Summary of the Invention

[0009] Technical Problem

[0010] The inverted U-shaped correlation of the Yerkes-Dodson law varies depending on the difficulty of the work or task being performed. For simple tasks, maintaining a certain degree of tension improves productivity. For complex tasks, relaxing the tension may be more effective. The appropriate arousal level varies among individuals. To improve intellectual productivity, not only a healing effect is required, but also appropriate stimulation is applied to arouse. To guide to an appropriate arousal state during work, it is desirable to apply stimulation suitable for the user through a wearable device that does not interfere with the work.

[0011] An object of the present invention is to provide a wearable device and a wakefulness state control system provided with the wearable device. The wearable device can appropriately control the wakefulness state according to various situations of using the wearable device.

[0012] Solution to the problem

[0013] A wearable device is worn by a user, and the wearable device includes: a main body; and a plurality of stimulators located on the main body to apply different types or different intensities of stimulation to the user based on the biological information of the user.

[0014] A wakefulness state control system includes a sensor, a stimulation control unit, and a wearable device. The sensor acquires the biological information of the user. The stimulation control unit determines various types of stimulation for controlling the wakefulness state of the user according to the biological information. The wearable device applies the various types of stimulation determined by the stimulation control unit to the user. The wearable device includes: a main body; and a stimulator located on the main body to apply the various types of stimulation.

[0015] Effect of the present invention

[0016] A wearable device is realized, which appropriately controls the wakefulness state of a user by using a combination of different types or different intensities of stimulation. Description of the drawings

[0017] A more complete understanding of the embodiments of the present disclosure and many of its attendant advantages and features can be easily obtained and understood from the following detailed description with reference to the accompanying drawings.

[0018] Figure 1

[0019] Figure 1 is a schematic diagram of a wakefulness state control system according to an embodiment of the present invention.

[0020] Figure 2

[0021] Figure 2 is a schematic diagram showing a wearable device worn by a user according to an embodiment of the present disclosure.

[0022] Figure 3A

[0023] Figure 3A is a diagram of a wearable device according to the first example of the present disclosure.

[0024] Figure 3B

[0025] Figure 3B is a diagram of a wearable device according to the second example of the present disclosure.​​​​​​​​

[0026] Figure 3C

[0027] Figure 3C This is a diagram of a wearable device according to the third example of the present disclosure.

[0028] Figure 4

[0029] Figure 4 This is a block diagram showing the hardware configuration of an information processing device according to an embodiment of the present disclosure.

[0030] Figure 5

[0031] Figure 5 This is a functional block diagram of a stimulation control unit according to an embodiment of the present disclosure.

[0032] Figure 6A

[0033] Figure 6A This is a flowchart of the control executed by a stimulation control unit according to an embodiment of the present disclosure.

[0034] Figure 6B

[0035] Figure 6B This is Figure 6A a continuation of the flowchart.

[0036] Figure 7

[0037] Figure 7 This is a table showing the evaluation results of arousal state control.

[0038] Figures 8A to 8C

[0039] Figures 8A to 8C This is a diagram showing a first structural example of a stimulator included in a wearable device.

[0040] Figures 9A to 9C

[0041] Figures 9A to 9C This is a diagram showing a second structural example of a stimulator included in a wearable device.

[0042] Figures 10A to 10D

[0043] Figures 10A to 10D This is a partial diagram of a wearable device, showing a third structural example of a stimulator included in the wearable device.

[0044] Figures 11A to 11C

[0045] ​​​​​​​​​​​​​​​​​​​​Figures 11A to 11C It is a partial view of a wearable device, showing a fourth structural example of a stimulator included in the wearable device.

[0046] Figures 12A to 12C

[0047] Figures 12A to 12C It is a view showing a fifth structural example of a stimulator included in the wearable device.

[0048] Figures 13A to 13B

[0049] Figures 13A to 13B It is a view showing a sixth structural example of a stimulator included in the wearable device.

[0050] Figure 14

[0051] Figure 14 It is a view showing a seventh structural example of a stimulator included in the wearable device.

[0052] Figure 15

[0053] Figure 15 It shows Figure 14 a wearable device and a stimulation component separated from the main body of the wearable device Figure 14 of.

[0054] Figures 16A to 16D

[0055] Figure 16A It is a view showing the first step of installing a stimulation component to a wearable device according to an embodiment of the present disclosure.

[0056] Figure 16B It shows the second step of installing a stimulation component to Figure 16A a wearable device.

[0057] Figure 16C It shows the third step of installing a stimulation component to Figure 16A a wearable device.

[0058] Figure 16D It shows the fourth step of installing a stimulation component to Figure 16A a wearable device.

[0059] Figure 17

[0060] Figure 17 It is a view of a wearable device according to another example of the present disclosure.

[0061] Figure 18 ​​​​​​​​​​​​​​

[0062] Figure 18 is a diagram showing the structure of the skin contact surface side of a wearable device Figure 17 that is shown in the drawings.

[0063] Figure 19

[0064] Figure 19 is a diagram of a wearable device according to another example of the present disclosure.

[0065] The accompanying drawings are intended to depict embodiments of the present invention and should not be construed as limiting its scope. The drawings should not be considered as drawn to scale unless explicitly noted. Similarly, the same or similar reference numerals denote the same or similar components in multiple views.

[0066] When describing the embodiments shown in the drawings, specific terms are used for clarity. However, the disclosure of this specification is not intended to be limited to the specific terms so selected, and it should be understood that each specific element includes all technical equivalents having similar functions, operating in a similar manner, and achieving similar results. Detailed Description

[0067] When describing the embodiments shown in the drawings, specific terms are used for clarity. However, the disclosure of this specification is not intended to be limited to the specific terms so selected, and it should be understood that each specific element includes all technical equivalents having similar functions, operating in a similar manner, and achieving similar results.

[0068] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As used herein, the singular forms "a", "an", and "the" are also intended to include the plural forms unless the context clearly indicates otherwise.

[0069] For simplicity, the same reference numerals denote the same elements having the same functions, such as components and materials, and redundant descriptions thereof are omitted unless otherwise required. The dimensions and relative positions of the components shown in the drawings may be exaggerated to facilitate understanding of the present invention. As used herein, the term "connected / coupled" includes direct connection and connection in which one or more intermediate connection elements are present.

[0070] In embodiments of the present invention, not only relaxation effects but also appropriate tension is applied to the user based on biological information, thereby guiding the user to an appropriate awakening state. To this end, the user's biological information is analyzed to generate and apply different types of stimuli. For example, a first stimulus for increasing tension or awakening is combined with a second stimulus for reducing tension or awakening. The user's awakening state is appropriately controlled by simultaneously or separately applying different types of stimuli to improve intellectual productivity.

[0071] ​​A description will be given of the structure of the arousal state control system and the wearable device according to an embodiment of the present invention.

[0072] Figure 1 It is a schematic diagram of the arousal state control system 1 of this embodiment. The arousal state control system 1 includes a sensor 115, a stimulation control unit 210, and a stimulator 12. The sensor 115 acquires biological information of the user. The stimulation control unit 210 determines one or more types of stimulation based on the biological information to control the arousal state of the user. The stimulator 12 applies the one or more types of stimulation determined by the stimulation control unit 210 to the user. The stimulator 12 is implemented in the form of a wearable device 10. When the user wears the wearable device 10 to perform an operation, it is possible to appropriately stimulate the user's arousal during the operation.

[0073] In addition, the wearable device 10, the sensor 115, and the information processing device 200 may also be separate devices. Or at least one of the sensor 115 and the stimulation control unit 210 may be assembled in the wearable device 10. The information processing device 200 may be connected to the sensor 115 and the wearable device 10 through a cable or wirelessly. As the information processing device 200, a microprocessor may also be built into the wearable device 10. Or the information processing device 200 may also be an individual computer, a smart phone, a tablet terminal, etc. independent of the wearable device 10. The sensor 115 may be connected to the wearable device 10 or the information processing device 200 by wire or wirelessly.

[0074] Figure 2 It shows the wearable device 10 worn by the user according to this embodiment. The wearable device 10 is worn on a body part of the user 5, where the user 5 can be effectively aroused. The wearable device 10 of this embodiment is worn on the neck 51 of the user 5. In Figure 2In the example, the wearable device 10 has a U-shaped portion that surrounds a part of the periphery of the neck 51 of the user 5, but it can also be C-shaped. Alternatively, the wearable device 10 can have an O-shape that surrounds the entire periphery of the neck 51 of the user 5. In addition to such shapes worn on the neck 51, the shape and configuration of the wearable device 10 can be varied to be worn on the shoulders, waist, upper arms, lower arms, or any other appropriate part of the body of the user 5. The stimulator 12 applies one or more different types of stimulation to the user 5. For example, stimulation that increases the arousal level or concentration is applied to an appropriate part of the neck 51, and stimulation that decreases the arousal level (stimulation that relaxes the arousal level). Thermal stimulation and electrical stimulation can be applied simultaneously or alternately to adjust the arousal level. Three or more types of stimulation can be applied simultaneously or separately. In addition, instead of applying different types of stimulation separately, stimulation of the same type but different intensities can be applied. The arousal level represents the degree of arousal or relaxation of the user (subject). In the following description, the arousal level is sometimes referred to as the arousal state, and sometimes the arousal level is referred to as the tense state or the nervous state. In the evaluation of the arousal level, a high arousal level indicates that the nerves of the user are more tense compared to the reference arousal level, and a low arousal level indicates that the user is more relaxed compared to the reference arousal level. In an embodiment of the present invention, the so-called reference arousal level is, for example, the "target arousal level" described later.

[0075] When the sensor 115 is assembled to the wearable device 10, the sensor 115 can be disposed inside the wearable device 10, or can be worn at a position in contact with the carotid artery at the lower part of the ear 52 of the user 5, or can be worn on the earlobe or wrist of the user 5.

[0076] Figure 3A 、 3B and 3C represent different configurations of the wearable device 10. Specifically, Figure 3A represents the wearable device 10A according to the first example of the present disclosure. The wearable device 10A has a main body 110 and stimulators 12a, 12b, 12c provided on the main body 110. Hereinafter, the stimulators 12a, 12b, 12c are sometimes simply referred to as the stimulator 12.

[0077] Figure 3A The wearable device 10A shown is the same as Figure 1The sensor 115 and the information processing device 200 in the wakefulness state control system 1 are independent. A communication device 117 is provided on the main body 110 of the wearable device 10A. The communication device 117 receives a control signal representing the analysis result of biological information from an external information processing device 200. According to the received control signal, a part or all of the stimulators 12a, 12b, and 12c are driven. The information processing device 200 can be any device as long as it has the function of analyzing the biological information obtained from the sensor 115 and sending the analysis result to the wearable device 10. As described above, for example, a personal computer, a smart phone, or a tablet terminal can be used as the information processing device 200.

[0078] The stimulators 12a, 12b, and 12c generate different stimuli respectively. As an example, the stimulator 12a has first electrodes 121 and 122 disposed inside the bent portion 101 of the U-shaped main body 110. The first electrodes 121 and 122 contact the rear side or the neck of the user 5's neck 51 when the wearable device 10A is worn on the user 5's neck 51. The stimulator 12a applies heat stimulation or low-frequency electrical stimulation to the user 5's neck via the first electrodes 121 and 122. The number of the first electrodes is not limited to two. Three or more first electrodes can be provided along the inner surface of the bent portion 101 of the main body 110.

[0079] When the stimulator 12a generates heat, the heater provided inside the stimulator 12a is activated according to the control signal received by the communication device 117 to apply heat through the first electrodes 121 and 122. When the stimulator 12a applies low-frequency electrical stimulation, the oscillation circuit provided inside the stimulator 12a is turned on to apply low-frequency vibration through the first electrodes 121 and 122. The low-frequency vibration provides electrical muscle stimulation (EMS). The heat or low-frequency vibration applied to the neck is generally used as a relaxation stimulus to relax muscle tension. However, depending on individual differences or stimulation intensity, the heat or low-frequency vibration can also be used as a wakefulness stimulus.

[0080] The stimulator 12b is mounted on the arm 130, and each arm extends on either side of the bent portion 101 of the main body 110. The stimulator 12b has second electrodes 123 and 124 protruding from the arm 130 in the width (or height) direction of the main body 110. In the case where the wearable device 10A is worn on the user 5's neck 51, the second electrodes 123 and 124 contact the skin surface around the carotid artery on the lower side of the user 5's ear 52 or cheek. The stimulator 12b applies high-frequency electrical stimulation to the carotid artery of the user 5 via the second electrodes 123 and 124. The oscillation circuit provided inside the stimulator 12b is turned on to apply high-frequency vibration through the second electrodes 123 and 124. The high-frequency vibration is generally used as a relaxation stimulus to improve blood flow. However, depending on individual differences or stimulation intensity, the high-frequency vibration can also be used as a wakefulness stimulus.

[0081] The stimulator 12c is provided on the inner side of the arm 130, and each arm extends on both sides of the bent portion 101 of the main body 110. The stimulator 12c has third electrodes 125 and 126 facing each other. When the wearable device 10A is worn on the neck 51 of the user 5, the third electrodes 125 and 126 come into contact with the skin surface along the periphery of the carotid artery of the user 5. The stimulator 12c applies a cold or heat stimulus to the carotid artery of the user 5 via the third electrodes 125 and 126. When the stimulator 12c applies a cold or heat stimulus, a cold or heat stimulus is generated by controlling the on / off of the driving voltage of the Peltier element provided inside the stimulator 12c and the positive / negative of the applied voltage. Appropriate cooling and warming of the carotid artery generally act in the direction of increasing the arousal level. However, when the blood vessels are overly dilated, the user may sometimes be relaxed due to the cool sensation stimulus.

[0082] Figure 3B It is a schematic diagram of the wearable device 10B of the second example of the present invention. In addition to the Figure 3A structure, the wearable device 10B also has a sensor 115 connected to the communication device 117. Figure 3B The shown wearable device 10B has a sensor 115, which is independent of the information processing device 200 in the arousal state control system 1 of the Figure 1 . In the Figure 3B example, the sensor 115 is connected to the main body 110 through a cable 116 and is electrically connected to the communication device 117. Alternatively, the sensor 115 can be wirelessly connected to the communication device 117. In the case where the sensor 115 can directly communicate with the external information processing device 200 without the communication device 117, the configuration is as shown in Figure 3A . The sensor 115 is a biosensor such as a heart rate sensor, a pulse sensor, a temperature sensor, or a sweating sensor. When the sensor 115 is a heart rate sensor or a pulse sensor, the sensor 115 can be a type of sensor attachable to the earlobe or fingertip of the user 5, or can be another type of sensor attachable to the chest of the user 5.

[0083] The communication device 117 sends the biological information acquired by the sensor 115 to the external information processing device 200. The information processing device 200 analyzes the acquired biological information, determines the stimulus to be applied to the user 5, and sends the determined stimulus as a control signal to the wearable device 10B. The wearable device 10B drives a part or all of the stimulators 12a, 12b, and 12c based on the control signal received by the communication device 117. The configuration and functions of the stimulators 12a, 12b, and 12c of the main body 110 refer to the description of Figure 3A above.

[0084] Figure 3CSchematic diagram of the wearable device 10C according to the third example of the present invention. The wearable device 10C includes a microprocessor 120 in a main body 110 and a sensor 115 connected to the microprocessor 120. Figure 3C The illustrated wearable device 10C is in Figure 1 the arousal state control system 1 with the sensor 115 and the information processing device 200. Although the information processing device 200 is implemented by the microprocessor 120, the information processing device 200 may be implemented by a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC). In Figure 3C it, the sensor 115 is connected to the main body 110 through a cable 116 and connected to the microprocessor 120. Alternatively, the sensor 115 may be wirelessly connected to the microprocessor 120 having a built-in communication function.

[0085] The microprocessor 120 analyzes the biological information obtained from the sensor 115 and drives part or all of the stimulators 12a, 12b, 12c of the main body 110. The structures and functions of the stimulators 12a, 12b, 12c are as Figure 3A described therein. In addition to Figure 3A , 3B and the configuration shown in 3C, the main body 110 may simply be provided with a microprocessor 120 having a wireless communication function. In this case, in Figure 1 the arousal state control system 1, the wearable device 10 and the information processing device 200 are integrated independently of the sensor 115. In addition, as long as it is a structure capable of controlling the user's arousal state through one or more stimuli generated based on the obtained biological information, the structures of the arousal state control system 1 and the wearable device 10 may be any structures.

[0086] Figure 4 It is a block diagram showing the hardware configuration of the information processing device 200 according to the present embodiment. The information processing device 200 includes a processor 201, a main memory 202, an auxiliary memory 203, an input / output interface (I / F) 204, and a communication interface (I / F) 205, which are connected to each other through a system bus 206.

[0087] The processor 201 is implemented by a central processing unit (CUP), executes control processing including various types of arithmetic processing, and realizes the function of the stimulation control unit 210. In the control processing executed by the processor 201, it includes acquisition of biological information, analysis of biological information, determination of stimulation, acquisition of a target arousal level set by the user, acquisition of a subjective evaluation input by the user, etc.

[0088] The determination of the stimulus includes, for example, the determination of the stimulus type, stimulus combination, stimulus duration, and stimulus intensity, as well as the correction or change of the determined stimulus type, determined stimulus combination, determined stimulus duration, and determined stimulus intensity. Additionally, as described later, for example, the type of stimulus corresponding to the task, the duration of the stimulus, and the target arousal level can also be corrected based on the change in the difference between the target arousal level and the arousal level calculated from the biological information, and the subjective evaluation.

[0089] The main memory 202 includes a read-only memory (ROM) that stores programs for the operation of the processor 201 and a random access memory (RAM) that serves as the working area of the processor 201. The auxiliary memory 203 includes a storage device such as a hard disk drive (HDD) or a solid state drive (SSD). In addition to storing various programs and parameter information for starting the programs, the auxiliary memory 203 also stores information and parameters for arousal state control.

[0090] The input / output interface 204 connects input / output devices such as a display, a touch panel, a speaker, headphones, a microphone, and a keyboard to the information processing device 200. The communication interface 205 enables communication between the information processing device 200 and an external device through, for example, a public communication network, a local area network (LAN), or a short-range communication standard. The communication between the information processing device 200 and the sensor 115 or the wearable device 10 can be performed according to a short-range wireless communication standard.

[0091] Hereinafter, the functional structure of the stimulus control unit 210 of the present embodiment will be described.

[0092] Figure 5 is a functional block diagram of the stimulus control unit 210 of the present embodiment. The stimulus control unit 210 is implemented by the processor 201. The stimulus control unit 210 includes a biological information acquisition unit 211, a target level setting unit 212, a data analysis unit 213, a stimulus determination unit 214, and an evaluation acquisition unit 215.

[0093] The biological information acquisition unit 211 acquires the biological information of the user wearing the wearable device 10. As described above, the biological information can be directly obtained from the sensor 115 worn by the user. Alternatively, the biological information can also be obtained from the wearable device 10.

[0094] The target level setting unit 212 obtains the setting of the target arousal state input by the user. The target arousal state represents the target arousal level or target tension when the user performs an operation. The target arousal state can be represented by a value such as a respiration rate, a sweating level, a heart rate, or a blink rate. In this sense, the target arousal state is referred to as the "target arousal level". In the present embodiment, the parameter representing the arousal level is the ratio (LF / HF) of the low-frequency (LF) component to the high-frequency (HF) component included in the power spectrum of the heart rate variation obtained by analyzing the heart rate. In this case, the target arousal level is set to the target LF / HF value.

[0095] The LF component is a frequency band in the range of 0.004 Hz to 0.150 Hz in the power spectrum of the heart rate variation. The LF component is considered to be a component that reflects the activities of both the sympathetic nerve and the parasympathetic nerve. The HF component is a frequency band in the range of 0.150 Hz to 0.400 Hz in the power spectrum of the heart rate variation. The HF component is considered to be a component that reflects the activity of the parasympathetic nerve. The ratio of LF to HF (LF / HF) indicates which of the sympathetic nerve and the parasympathetic nerve is dominant and to what extent. When the user is awake or tense, the sympathetic nerve is dominant over the parasympathetic nerve. In other words, the LF / HF value is relatively large. When the user is relaxed, the parasympathetic nerve is dominant over the sympathetic nerve. In other words, the LF / HF value is relatively small.

[0096] The data analysis unit 213 determines the arousal level of the user by analyzing the biological information. In addition, in the following description, the data analysis unit 213 is sometimes referred to as the arousal state acquisition unit. In the case where the ratio of LF to HF (LF / HF) is used as the parameter representing the arousal level, the data analysis unit 213 extracts the LF component and the HF component from the obtained power spectrum of the heart rate variation, and calculates the ratio of LF to HF (LF / HF). In addition, the data analysis unit 213 refers to the target arousal level set by the user, and determines the difference between the calculated LF / HF value and the target arousal level. When the difference between the current LF / HF value and the target arousal level exceeds the allowable range, the data analysis unit 213 detects that the user is overly relaxed or overly tense. The data analysis unit 213 monitors the change direction of the difference.

[0097] The stimulation determination unit 214 determines the stimulation to be applied to the user based on the result of the analysis performed by the data analysis unit 213. When the data analysis unit 213 determines that the user is overly relaxed, the stimulation determination unit 214 selects a stimulation that increases the arousal level according to the difference between the calculated LF / HF value and the target arousal level. On the other hand, when the data analysis unit 213 determines that the user is overly hyperactive, the stimulation determination unit 214 selects a stimulation that decreases the arousal level. Since the types of stimulations effective for increasing or decreasing the arousal level vary according to the user, the tendency of the user may be measured in advance, and the stimulation determination unit 214 determines the stimulations for the arousal level and relaxation degree effective for the user.

[0098] For a user who can transfer from a tense state to a relaxed state by cooling the carotid artery of the user, when the user is overly tense, the stimulation determination unit 214 selects a cold stimulation. For a user who transfers to an awake state by low-frequency electrical stimulation, when the user is overly relaxed, the stimulation determination unit 214 selects low-frequency electrical stimulation. On the other hand, for a user who transfers from a relaxed state to an awake state by cooling the carotid artery of the user, when the user is overly relaxed, the stimulation determination unit 214 selects a cold stimulation. For a user who is relaxed due to low-frequency electrical stimulation, when the user is overly tense, the stimulation determination unit 214 selects low-frequency electrical stimulation.

[0099] As the first stimulation, a stimulation generally considered effective for arousal or relaxation can be selected by default. Or a stimulation can also be randomly selected from the stimulator 12 of the wearable device 10. The stimulation control unit 210 can appropriately correct or change the initially selected stimulation and guide the user's arousal level to the target arousal level by repeatedly acquiring biological information during the user's operation and determining the arousal level based on the change in biological information relative to the target arousal level. The correction or change of the stimulation will be described later.

[0100] The evaluation acquisition unit 215 acquires an evaluation of whether the wearable device 10 has improved the performance of the user wearing the wearable device 10. The evaluation can be a subjective evaluation input by the user to the information processing device 200 after completing the work. Or the evaluation can also be automatically determined by the data analysis unit 213 according to the degree of approaching the target arousal level or the time to reach the target arousal level.

[0101] The stimulation control unit 210 determines different types of stimulations according to the user's biological information and appropriately controls the user's arousal state. The stimulation control unit 210 corrects or changes, for example, the stimulation type, stimulation time, stimulation intensity, etc., according to the difference between the detected current arousal level and the target arousal level, so that the arousal level becomes an appropriate arousal level. By feeding back the evaluation result, the target arousal level can be re-evaluated for each user.

[0102] Next, the arousal state control process of this embodiment will be described.

[0103] Figure 6A It is a flowchart of the arousal state control executed by the stimulation control unit 210, i.e., the processor 201, of this embodiment. Figure 6B It is Figure 6A a continuation of the flowchart. Specifically, Figure 6B the process shown starts from Figure 6A the node A shown. In step S1, the stimulation control unit 210 starts acquiring biological information from the sensor 115. When the user wears the wearable device 10 and starts a predetermined application of the information processing device 200, the stimulation control unit 210 starts acquiring biological information.

[0104] In step S2, the stimulation control unit 210 obtains the job category. In step S3, the stimulation control unit 210 obtains the target arousal level L TRGT as the target arousal level. The job content and the target arousal level L TRGT are input by the user to the information processing device 200. The job type indicates the degree of intellectual work involving the user's thinking. Job types are represented by, for example, simple jobs, normal jobs, and complex jobs. Additionally, the job scheduled time can also be input together with the job type. The target arousal level L TRGT represents the arousal level required for the scheduled job.

[0105] In this embodiment, the target LF / HF value or the range of the target LF / HF value is input by the user as the target arousal level. When using the ratio of LF to HF (LF / HF), it is only necessary to set the target arousal level within the range of 1.5 or more and 5.0 or less according to the job content. Additionally, to make the operation simple, the target arousal level L TRGT can also be set slightly higher so as not to cause drowsiness. Also, in the case of performing complex intellectual work, the target arousal level L TRGT can be set slightly lower to avoid imposing excessive pressure on the user. The order of steps S2 and S3 can be reversed. Alternatively, the stimulation control unit 210 can perform the operations in steps S2 and S3 simultaneously.

[0106] In step S4, the stimulation control unit 210 obtains and analyzes biological information. The stimulation control unit 210 analyzes the biological information (e.g., heart rate information) obtained at a specified time interval, extracts the LF component and HF component contained in the change of the heart rate information, and calculates the ratio of LF to HF (LF / HF). For example, the stimulation control unit 210 analyzes the heart rate for 5 minutes and calculates the LF / HF value. The process is updated once every minute. However, the present disclosure is not limited to the above method. The data accumulation time and the update time interval can be appropriately set. For example, the time interval used for data analysis and the calculated LF / HF value are as follows:

[0107] Time interval LF / HF

[0108] 10:00-10:05 2.0

[0109] 10:01-10:06 1.4

[0110] 10:02-10:07 1.8

[0111] 10:03-10:08 1.2

[0112] Subsequently, LF / HF values ​​were calculated for each analysis interval, which was a 5-minute time interval and shifted every minute.

[0113] In step S5, the stimulation control unit 210 determines whether the LF / HF value calculated for each analysis interval is within the target arousal level L TRGT The specified range near (L TRGT ±ΔL). When the calculated LF / HF value is within L TRGT If the user is within the range of ±ΔL ("Yes" in step S5), the user is in an appropriate wakefulness state corresponding to the type of work. In step S6, the stimulation control unit 210 determines whether the work is completed. If the work is not completed (step S6: No), the stimulation control unit 210 repeatedly obtains and analyzes biological information (step S4), and confirms the wakefulness state (step S5) until the work is completed (step S6: Yes).

[0114] When the calculated LF / HF value is not in L TRGT If the calculated LF / HF value exceeds the allowable range and is smaller than ±ΔL (No in step S5), the user's wakefulness state deviates from the target wakefulness level set according to the type of work. TRGT-ΔL > (calculated value), the stimulation control unit 210 determines that the user is in an over-relaxed state for the current task. In this case, in step S8, the stimulation control unit 210 selects a stimulation that increases the arousal level, i.e., an arousal stimulation. When the user is effective for arousal with low-frequency electrical stimulation, the stimulator 12a is driven to apply low-frequency electrical stimulation. The stimulation control unit 210 can determine the stimulation and the stimulation time.

[0115] In step S9, when the calculated LF / HF value exceeds the allowable range and is large (L TRGT +ΔL < (calculated value), the stimulation control unit 210 determines that the user is in an over-tense (or stressed) state for the current task. In this case, in step S10, the stimulation control unit 210 selects a stimulation that decreases the arousal level, i.e., a relaxation stimulation. When the user is relaxed by cold stimulation of the carotid artery, the stimulator 12c is driven to appropriately cool the back of the user's neck. Alternatively, the stimulator 12a can also be driven to apply heat stimulation to the back of the user's neck to warm the back of the neck. It is also possible to drive both the stimulators 12a and 12c. The stimulation control unit 210 can determine the relaxation stimulation, as well as determine the stimulation duration and stimulation intensity.

[0116] In step S11, the stimulation control unit 210 outputs a control signal for applying the stimulation determined in step S8 or S10 to the stimulator 12. Based on this control signal, the stimulator 12 generates and applies the stimulation.

[0117] In step S12, the stimulation controller 210 continues to acquire and analyze the biological information. In step S13, the stimulation control unit 210 determines whether the difference between the calculated LF / HF value and the target arousal level changes in the decreasing direction. When the difference between the calculated LF / HF value and the target arousal level decreases (in step S13, "yes"), an appropriate stimulation is selected. Therefore, the stimulation control unit 210 repeatedly acquires and analyzes the biological information (step S4) and confirms the arousal state (step S5) until the task ends (step S6: yes).

[0118] On the other hand, when the difference between the calculated LF / HF value and the target arousal level does not decrease (step S13: no), the selected stimulation is inappropriate. Therefore, in step S14, the stimulation control unit 210 corrects or changes at least one of the stimulation type, stimulation duration, and stimulation intensity. This correction is reflected in the selection of the arousal stimulation in step S8 and the selection of the relaxation stimulation in step S10. Thus, the determination of the learning stimulation is made. Then, the stimulation control unit 210 repeats the acquisition and analysis of the biological information (step S4) and the confirmation of the arousal state (step S5) until the task ends (step S6: yes).

[0119] In the case where the operation ends (Step S6: Yes), in Step S15, the stimulation control unit 210 obtains an evaluation related to performance improvement. The evaluation can be a subjective evaluation by the user, indicating whether the user's operation efficiency or performance has been improved by applying the stimulation. In Step S16, for example, the stimulation control unit 210 determines whether the subjective evaluation indicates an improvement in operation efficiency. In the case where the subjective evaluation indicates an improvement in operation efficiency (Step S16: Yes), it means that the stimulation for a specific type of operation is successful. In this case, the process ends while maintaining the set target arousal level, the selected type of stimulation, and the stimulation duration.

[0120] On the other hand, in the case where the operation efficiency has not improved despite the correction of the stimulation (in Step S16, "No"), the target arousal level set for a specific type of operation may be inappropriate. In Step S17, the stimulation control unit 210 corrects the target arousal level L TRGT . Thereby, the process ends. The correction of the target arousal level L TRGT is reflected in the setting of the target arousal level L TRGT in Step S3 for learning.

[0121] In Figure 6A , Figure 6B shown arousal state control, the stimulation control unit 210 can also determine the arousal level at regular time intervals in Step S5. For example, the stimulation control unit 210 can determine the user's arousal state at intervals of 10 minutes or 15 minutes. According to this arousal state control method, the stimulation control unit 210 can appropriately control the arousal state according to the operation performed by the user.

[0122] Hereinafter, the evaluation of the arousal state control of this embodiment will be described.

[0123] Figure 7 is a table showing the evaluation results of the arousal state control. User A and User B each wear the wearable device 10. In Figure 7 shown evaluation, both User A and B are adult males. The wearable device 10 can be applied to any user regardless of the user's gender and age. Under the control of the information processing device 200, one or more stimulations are applied to User A and B respectively. In all evaluations, heart rate data is obtained as biological information, and the LF / HF value is calculated as a parameter representing the arousal level. The LF / HF value is calculated by analyzing the heart rate data for 5 minutes and updated once per minute.

[0124] The evaluation items refer to the change rate of the arousal level and the time to reach the target arousal level. The change rate of the arousal level represents the change in the over-tension state on the positive side, i.e., when the LF / HF value is higher than the target arousal level, and the change in the over-relaxed state on the negative side, i.e., when the LF / HF value is smaller than the target arousal level. The time to reach the target arousal level is also represented separately on the positive and negative sides as needed.

[0125] If the LF / HF value of 15 points before the facility applies the stimulus is "BFR" and the LF / HF value of 15 points starting from the maximum value of the LF / HF value during the application of the stimulus is "AFT", then the change rate R of the arousal level is obtained by the following formula CHN (%):

[0126] R CHN =100×(AFT - BFR) / BFR

[0127] Set the target change rate to 100 ± 10%, and set the time to reach the target arousal level to the time within the range where the average value of the change rates of 3 points reaches 100 ± 10%. If the target change rate is not reached during 30 minutes of continuous stimulation, or if the LF / HF value shows an upward deviation, the change rate R of the arousal level CHN is evaluated as 0 (%).

[0128] Next, Figure 7 Example 1 shown below will be described.

[0129] In Example 1, different types of stimuli (1) and (2) are applied to the carotid artery and the nape of the neck of User A respectively. Specifically, stimulus (1) in Example 1 is a cold stimulus applied to the carotid artery, and stimulus (2) in Example 1 is a heat stimulus applied to the nape of the neck. The stimulators 12c and 12a of the wearable device 10 are alternately driven to alternately apply stimuli (1) and (2) for 30 minutes each. When stimuli (1) and (2) are alternately applied, the LF / HF value on the positive (+) side (i.e., in the over-pressure state) is 3.6, and the change rate R CHN is 140%, and the time to reach the target arousal level (i.e., the target LF / HF value) is 8 minutes. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) is 0.3, and the change rate R CHN is 80%. The time to reach the target arousal level is 12 minutes. Compared with a single stimulus, the user can be awakened more effectively by different types of stimuli. In this case, both control to increase the arousal level and control to decrease the arousal level can be performed. As a result, the target arousal level is reached within about 10 minutes.

[0130] Next, Figure 7 Reference Example 1a shown below will be described.

[0131] Reference Example 1a shows the evaluation results when only stimulus (1) is applied to the carotid artery among the stimuli applied in Example 1. The LF / HF value on the positive (+) side (i.e., in the overpressure state) is 3.4, and the change rate R CHN is 120%. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) is 1.6, and the change rate R CHN is 7%. When stimulus (1) is applied alone for 30 minutes, it may be difficult to reach the target arousal level. In this example, although the cold stimulus to the carotid artery relaxed User A to some extent, the target arousal level was not reached. That is, as a stimulus for increasing the arousal level, the cold stimulus is not suitable for User A. Selecting another stimulus can increase the arousal level of User A.

[0132] Next, Figure 7 Reference Example 1b shown below will be described.

[0133] Reference Example 1b shows the evaluation results when only stimulus (2) among the stimuli applied in Example 1 is applied alone to the nape of the neck. The LF / HF value on the positive (+) side (i.e., in the overpressure state) is 1.4, and the change rate R CHN is 0%. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) is 0.4, and the change rate R CHN is 73%. In the case of only stimulus (2), when stimulus (2) is continuously applied for 30 minutes, the arousal effect is higher compared to the case of applying stimulus (1). For User A, the arousal level increased to some extent by thermally stimulating the nape of the neck. That is, the thermal stimulus can act in the direction of relieving tension.

[0134] Next, Figure 7 Example 2 shown below will be described.

[0135] In Example 2, different types of stimuli (1) and (2) are applied to the carotid artery of User A and the nape of the neck of User A, respectively. Specifically, stimulus (1) of Example 2 is a warm stimulus applied to the carotid artery, and stimulus (2) is (low-frequency) EMS applied to the nape of the neck. The stimulators 12c and 12a of the wearable device 10 are driven simultaneously to apply stimulus (1) and stimulus (2) simultaneously. When stimulus (1) and stimulus (2) are applied simultaneously, the LF / HF value on the negative (-) side (i.e., in the over-relaxed state) is 0.3, and the change rate R CHN is 80%, and the time to reach the target arousal level is 5 minutes. On the positive (+) side, the LF / HF value is as low as 1.5, and this value hardly fluctuates. By applying different stimuli simultaneously, the target arousal level is reached quickly.

[0136] Next, Figure 7 Reference Example 2a shown below will be described.

[0137] Reference Example 2a shows the evaluation results when, among the stimuli applied in Example 2, only Stimulus (1) was applied to the carotid artery. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) was 0.4, and the change rate R CHN was 73%, and the time to reach the target arousal level was 12 minutes. The LF / HF value on the positive (+) side was as low as 1.5, and this value hardly fluctuated. By including Reference Example 2a in the specific examples of the embodiments of the present invention, applying only the warm stimulus of Stimulus (1) to the carotid artery can control the arousal level to the target arousal level. However, compared with Example 2 in which the EMS of Stimulus (2) was applied in combination with Stimulus (1), it took more time to reach the target arousal level.

[0138] Next, Figure 7 Reference Example 2b shown below will be described.

[0139] Reference Example 2b shows the evaluation results when, among the stimuli applied in Example 2, only Stimulus (2) was applied to the nape of the neck. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) was 0.6, and the change rate R CHN was 60%. In addition, even when only Stimulus (2) was applied, the arousal level could be increased to a certain extent, but the target arousal level could not be reached by continuously applying Stimulus (2) for 30 minutes. The LF / HF value on the positive (+) side was as low as 1.5, and this value hardly fluctuated. For this user, by combining multiple types of stimuli, the target arousal level can be achieved more effectively compared to the case of stimulating only the nape of the neck with EMS.

[0140] Next, Figure 7 Example 3 shown below will be described.

[0141] In Example 3, different types of stimuli (1) and (2) were applied to the carotid artery and the nape of the neck of User B, respectively. Specifically, Stimulus (1) in Example 3 was a cold stimulus applied to the carotid artery, and Stimulus (2) was (low-frequency) EMS applied to the nape of the neck. The stimulators 12c and 12a of the wearable device 10 were driven simultaneously to apply Stimulus (1) and Stimulus (2) at the same time. When Stimulus (1) and Stimulus (2) were applied simultaneously, the LF / HF value on the positive (+) side (i.e., in the over-stress state) was 3.6, and the change rate R CHN was 140%. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) was 1.4, and the change rate R CHNIt is 7%. The time to reach the target arousal level is 9 minutes. The LF / HF value fluctuates slightly on the negative (-) side. Therefore, mainly, stimulation (1) acts on stress alleviation, while stimulation (2) finely regulates the arousal level in the direction of slightly increasing the arousal level. By applying different stimulations, it is possible to control in the direction of decreasing the arousal level and in the direction of increasing the arousal level. As a result, it is easy to reach the target arousal level.

[0142] Hereinafter, Figure 7 Reference Example 3a shown below will be described.

[0143] Reference Example 3a is the evaluation result when only the cold stimulation of stimulation (1) is applied to the carotid artery among the stimulations applied in Example 3. The LF / HF value on the positive (+) side (i.e., in the overpressure state) is 4.7, and the change rate R CHN is 213%. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) is 1.4, and the change rate R CHN is 0%. For User B, the intensity of stimulation (1) is too strong, and the LF / HF value shows an upward deviation, resulting in an evaluation failure. In this case, as in Example 3, by combining with the stimulation (2) in the direction of increasing the arousal level, the arousal level can be controlled to the desired arousal level.

[0144] Hereinafter, Figure 7 Reference Example 3b shown below will be described.

[0145] Reference Example 3b is the evaluation result when only stimulation (2) among the stimulations applied in Example 3 is applied to the nape of the neck alone. The LF / HF value on the negative (-) side (i.e., in the over-relaxed state) is 0.6, and the change rate R CHN is 60%. The target arousal level is not reached even after continuously applying stimulation (2) alone for 30 minutes. The LF / HF value on the positive (+) side is as low as 1.5, and this value hardly fluctuates. For this user, by combining multiple stimulations, compared with the case of only stimulating the nape of the neck by EMS, the target arousal level can be achieved more effectively.

[0146] Figure 7The results shown indicate that, depending on the user, the same stimulus can be a relaxation stimulus or an arousal stimulus. Additionally, the user's tendency can be obtained in advance, and the various stimuli that the wearable device 10 can apply can be classified as relaxation stimuli or arousal stimuli, and the classified various stimuli can be recorded in the built-in memory of the information processing device 200 or the microprocessor 120. In cases where a higher relaxation effect or an appropriate arousal effect can be obtained by combining two or more different types of stimuli, the combinations of different types of stimuli can also be recorded in the built-in memory of the information processing device 200 or the microprocessor 120. For example, in the case of applying a warm stimulus to the carotid artery only once, or applying a low-frequency electrical stimulus to the nape of the neck only, if the relaxation effect or arousal effect is too large, by applying a warm stimulus to the carotid artery and a low-frequency electrical stimulus to the nape of the neck, the arousal state can be finely adjusted to the desired arousal state.

[0147] In the case of implementing the arousal state control method of the embodiment of the present invention through a computer program, an arousal state control program is installed in the information processing device 200. The arousal state control program causes the processor 201 to execute:

[0148] (a) A step of obtaining the biological information of the user;

[0149] (b) A step of analyzing the obtained biological information, determining one or more stimuli, and controlling the arousal state of the user;

[0150] (c) A step of notifying the determined one or more stimuli to the stimulator.

[0151] Several examples of the position and configuration of the stimulator are described below.

[0152] First, several structural examples of the stimulators 12a, 12b, and 12c are described below. The stimulators 12a, 12b, and 12c are designed to minimize interference with the body of the user wearing the wearable device 10, so that the user feels comfortable when wearing the wearable device 10.

[0153] Hereinafter, the first structural example is described.

[0154] Figures 8A to 8C Shows the first structural example of the stimulator 12. Specifically, Figure 8A is a perspective view of the wearable device 10. Figure 8B is a front view of the wearable device 10. Figure 8CIt is a front view of the wearable device 10 worn by user 5. Stimulators 12a, 12b, and 12c are provided on the main body 110 of the wearable device 10. The stimulators 12a and 12c are circumferentially arranged on the inner side of the main body 110. The stimulators 12b and 12c are arranged in a direction intersecting the circumferential direction of the main body 110, for example, in a direction parallel to the width (w) direction of the main body 110.

[0155] When user 5 wears the wearable device 10, the first electrodes 121 and 122 of the stimulator 12a contact the rear part of the neck 51 or the nape of the neck, applying heat stimulation or low-frequency electrical stimulation. On the other hand, the stimulator 12c contacts the carotid artery extension side of the neck 51, applying cold stimulation or warm stimulation through the third electrodes 125 and 126. Combining different types of stimulation effectively guides the user to the target wake state.

[0156] The stimulator 12b is held by holders 111 at the edges of the arms 130 on both sides of the bent portion 101 and protrudes in the width (w) direction of the main body 110. The stimulator 12b applies high-frequency electrical stimulation to the side part of the neck 51 of the user 5 wearing the wearable device 10. By applying different stimulations to the same part near the carotid artery by the stimulators 12b and 12c, the user can be effectively guided to the target wake state.

[0157] The same effect can also be obtained by using the stimulators 12a and 12b simultaneously.

[0158] According to the body type of user 5, the upper end of the stimulator 12b can contact the jaw line. As Figure 8B shown, the outer shape of the stimulator 12b is circular, and the outer peripheries of the frames 1230 and 1240 that hold the second electrodes 123 and 124 are smooth curved surfaces. Thus, the stimulator 12b can reduce the interference with the user's jaw line.

[0159] Hereinafter, a second structural example will be described.

[0160] Figures 9A to 9C It shows a second structural example of the stimulator 12. Specifically, Figure 9A It is a perspective view of the wearable device 20A. Figure 9B It is a front view of the wearable device 20A. Figure 9C It is a front view of the wearable device 20A worn by user 5. Stimulators 12a, 12b, and 12c are provided on the main body 110 of the wearable device 20A. The positions and structures of the stimulators 12a and 12c are the same as those of the stimulators 12a and 12c of the wearable device 10 shown in Figures 8A to 8C the figure.

[0161] The stimulator 12b is held by the holder 221A such that the second electrodes 123 and 124 are inclined outward with respect to the width (w) direction of the main body 110 (more specifically, the arm 130). Since the stimulator 12b is inclined with respect to the width (w) direction of the main body 110, the stimulator 12b is also inclined with respect to the third electrodes 125 and 126 of the stimulator 12c located inside the arm 130. The stimulator 12b inclined with respect to the width (w) direction of the main body 110 conforms to the contour of the user 5 so as to effectively stimulate the carotid artery. In addition, since the stimulator 12b does not enter the jaw line of the user 5, the comfort of the user 5 wearing the wearable device 20A can be improved.

[0162] Next, a third structural example will be described.

[0163] Figures 10A to 10D Shows a third structural example of the stimulator 12. Figures 10A to 10D The stimulator 12b of the wearable device 20B shown is held by the holder 221B so as to be displaceable. The arrangement positions and structures of the stimulators 12a and 12c are the same as those of the Figures 8A to 8C stimulators 12a and 12c of the wearable device 10 shown and the Figures 9A to 9C stimulators 12a and 12c of the wearable device 20A shown.

[0164] Specifically, Figure 10A shows the stimulator 12b mounted on the arm 130 of the wearable device 20B before displacement (deformation). Figure 10B shows the stimulator 12b after displacement (deformation). Figure 10C is a partial front view of the wearable device 20B before displacing (deforming) the stimulator 12b. Figure 10D is a front view of the wearable device 20B worn by the user 5 after displacing (deforming) the stimulator 12b. The stimulator 12b is held on the arm 130 by the flexible holder 221B. The stimulator 12c is located inside the arm 130.

[0165] The holder 221B is formed of an elastic material such as resin, and has a first portion 260 fixed to the arm 130 and a second portion 261 that bends and extends from an end opposite to the fixed end of the first portion 260 and holds the stimulator 12b. The second portion 261 may be connected to the frame 1230 that holds the second electrode 123 of the stimulator 12b. As Figure 10B shown, when pressure is applied to the second electrode 123 of the stimulator 12b, the holder 221B deforms and the inclination angle of the stimulator 12b with respect to the arm 130 changes.

[0166] When the user 5 wears the wearable device 20B and the jaw line of the user 5 contacts the second electrode 123, applying pressure to the second electrode 123, as Figure 10D shown, the second electrode 123 tilts in a direction away from the jaw (below the ear) of the user 5. This tilt enables the stimulator 12b to fit the facial contour of the user 5 and prevents the stimulator 12b from getting caught in the jaw line of the user 5.

[0167] The holder 221B can be made of any material as long as the holder 221B can be deformed by pressure to displace the electrode surface of the stimulator 12b. For example, a metal leaf spring can be used as the holder 221B. Similar to the second electrode 123, the second electrode 124 of the second electrode 123 facing the stimulator 12b is held by the deformable holder 221B. When the jaw line of the user 5 contacts the second electrode 124 while applying pressure to the second electrode 124, the second electrode 124 is displaced in a direction away from the jaw of the user 5. The wearable device 20B having the Figures 10A to 10D structure shown guides the user 5 to the target waking state through a combination of different types of stimuli. By matching the shape of the stimulator 12b of the wearable device 20B to the shape of the neck or jaw of the user 5, the comfort of the user 5 wearing the wearable device 20B can be improved.

[0168] Hereinafter, a fourth structural example will be described.

[0169] Figures 11A to 11C A fourth structural example of the stimulator 12 is shown. The stimulator 12b can be mounted on the main body 110 and can be detached from the main body 110. Specifically, Figure 11A is a perspective view of the stimulator 12b held by the holder 270. Figure 11B is a side view of the stimulator 12b. Figure 11C is a schematic view of the separated stimulator 12b. The positions and structures of the stimulators 12a and 12c are the same as those of the stimulators 12a and 12c of the Figures 8A to 8C wearable device 10 shown, Figures 9A to 9C the stimulators 12a and 12c of the wearable device 20A shown, Figures 10A to 10D the stimulators 12a and 12c of the wearable device 20B shown. The stimulator 12b can also be loaded and unloaded relative to the main body 110 (refer to Figure 9A ) while being held by the holder 270. Alternatively, the stimulator 12b having a frame 1230 can be mounted on the holder 270 and can be detached from the holder 120, and the holder 120 is fixed to the arm 130 of the main body 110.

[0170] When the stimulator 12b is loaded and unloaded relative to the main body 110 together with the holder 270, it is only necessary to insert the holder 270 into a desired one of a plurality of recesses formed in the circumferential direction of the main body 110 or the arm 130. The recess may have a stop function. Since the user 5 can change the position of the stimulator 12b to a desired position according to the body shape, the stimulator 12b can effectively stimulate the carotid artery of the user 5. In addition, it is convenient for cleaning and maintenance of the stimulator 12b.

[0171] When the stimulator 12b is detachable relative to the holder 270, stimulators applying different types of stimulation can be mounted on the holder 270. For example, another stimulator 12 can be attached to the holder 270 to generate vibrations for generating music, far-infrared rays, or aromas instead of high-frequency electrical stimulation. In addition, it is convenient for cleaning and maintenance of the stimulator 12b. Figures 11A to 11C The structure shown is a structure for guiding the user 5 to a target waking state by a combination of different types of stimulation.

[0172] Hereinafter, a fifth structural example will be described.

[0173] Figures 12A to 12C Respectively show the wearable device 30A as a fifth structural example. Specifically, Figure 12A is a perspective view of the wearable device 30A. Figure 12B is a top view of the wearable device 30A. Figure 12C is a perspective view of the wearable device 30A worn by the user 5. The wearable device 30A has a stimulator 12a, a stimulator 32b, and a stimulator 32c in the main body 110. The stimulators 12a, 32b, and 32c are arranged circumferentially inside the U-shaped main body 110. The stimulator 32b and the stimulator 32c are arranged at the same position. The second electrodes 323 and 324 of the stimulator 32b are respectively surrounded by the third electrodes 325 and 326 of the stimulator 32c in the common plane of the stimulator 32b and the stimulator 32c. The position and structure of the stimulator 12a are the same as those Figures 8A to 11C shown.

[0174] In this example, each of the third electrodes 325 and 326 has an oblong planar shape to maintain a relatively wide contact surface for contacting the user 5. However, the shape of the third electrodes 325 and 326 is not limited to the oblong planar shape. Alternatively, for example, each of the third electrodes 325 and 326 may have an oval or rectangular shape. Each of the third electrodes 325 and 326 has an opening near the center. The second electrodes 323 and 324 of the stimulator 32b are respectively located within the openings of the third electrodes 325 and 326. The surfaces of the second electrodes 323 and 324 are substantially aligned with the surfaces of the third electrodes 325 and 326, respectively. The second electrode 323 and the third electrode 325 are electrically insulated from each other by, for example, an air layer or an insulating resin embedded between the second electrode 323 and the third electrode 325. Similarly, the second electrode 324 and the third electrode 326 are electrically insulated from each other by, for example, an air layer or an insulating resin embedded between the second electrode 324 and the third electrode 326.

[0175] The second electrodes 323 and 324 of the stimulator 32b can apply high-frequency electrical stimulation to the carotid artery, while the third electrodes 325 and 326 of the stimulator 32c can apply cold or warm stimulation to the same position of the carotid artery. Since the stimulators 32b and 32c are independently controlled, different types of stimulation can be applied to the same position on the neck simultaneously, alternately, or at appropriate times.

[0176] Figures 12A to 12C The shown configuration does not include a portion protruding from the main body 110 or the arm 130 in the width (w) direction of the main body 110 or the arm 130. With such a simple design, the comfort of the user 5 wearing the wearable device 30A can be improved. Thus, the wearable device 30A can achieve the same effect as the above structure by applying different types of stimulation at desired times.

[0177] Hereinafter, a sixth structural example will be described.

[0178] Figure 13A and Figure 13B respectively represent the wearable device 30B as the sixth structural example. Specifically, Figure 13A is a perspective view of the wearable device 30B. Figure 13B is a top view of the wearable device 30B. The wearable device 30B has a stimulator 12a, a stimulator 32c, and a stimulator 32d in the main body 110. The stimulators 12a, 32c, and 32d are circumferentially arranged along the inner side of the U-shaped main body 110. In addition, the positions and structures of the stimulators 12a and 32c are the same as those shown in FIGS. 12a to Figure 12C the structure shown.

[0179] The stimulator 32d is surrounded by the stimulator 32c in the common plane of the stimulator 32c and the stimulator 32d. In the case where the wearable device 30B is not installed, asFigure 13B As shown, the fourth electrodes 327 and 328 of the stimulator 32d project inward from the surfaces of the third electrodes 325 and 326 of the stimulator 32c toward the main body 110. When the user 5 wears the wearable device 30B, the fourth electrodes 327 and 328 come into contact with the sides of the user 5's neck 51 (see Figure 12C ), and retract to the inside of the arm 130. As a result, the surfaces of the fourth electrodes 327 and 328 are aligned with the surfaces of the third electrodes 325 and 326, respectively. That is, the perspective view of the wearable device 30B worn by the user 5 is the same as that of the Figure 12C wearable device 30A.

[0180] Figure 13A and 13B The structure shown does not include a portion that protrudes from the main body 110 or the arm 130 in the width (w) direction of the main body 110 or the arm 130. With such a simple design, the comfort of the user 5 wearing the wearable device 30B can be improved. In addition, the fourth electrodes 327 and 328 of the stimulator 32d that can protrude retractably in a direction orthogonal to the inner surface of the arm 130 can reliably contact the user 5 when the user 5 wears the wearable device 30B, and can effectively stimulate the user 5's neck 51.

[0181] Thus, the wearable device 30B can obtain the same effect as the above structure by applying different types of stimuli at desired times.

[0182] Next, a seventh structural example will be described.

[0183] Figure 14 The wearable device 40 as a seventh structural example is shown. According to the seventh structural example, the stimulator is detachable from and attachable to the main body 110 of the wearable device 40. Similar to the first to sixth structural examples, the wearable device 40 applies various types of stimuli. The wearable device 40 includes, for example, a stimulator 12a and a stimulator 42 in the main body 110. The position and structure of the stimulator 12a are the same as those shown in Figures 12A to 12C . The stimulator 42 is provided inside the arm 430. For example, the arm 430 can rotate in a plane orthogonal to the longitudinal axis of the main body 110. Different types of stimulation components can be provided on the arm 430 in a replaceable or detachable manner.

[0184] The stimulator 12a applies low-frequency electrical stimulation through the first electrodes 121 and 122 disposed at the center of the portion of the main body 110 that contacts the nape of the neck. The portion of the main body 110 that contacts the nape of the neck contacts the nape of the neck of the user 5. On the arms 430 at each end of the main body 110, there is a stimulator 42 for detachably mounting one or more types of stimulating components. For example, the stimulating components 420j and 420i are arranged in parallel in the stimulator 42. Specifically, the stimulating component 420j that applies cold stimulation by cooling is located above the stimulating component 420i that applies warm stimulation by heating. The stimulating components 420i and 420j contact near the carotid artery to selectively or alternately apply warm stimulation and cold stimulation respectively.

[0185] Figure 15 It shows the wearable device 40 and the stimulating component 420 separated from the main body 110 of the wearable device 40. Sockets 421 and 422 for detachably receiving the stimulating component 420 are provided inside the arms 430 of the wearable device 40, so that the stimulating component 420 can be detached from the sockets 421 and 422. The sockets 421 and 422 are provided with electrode pads on the bottom surface for electrically connecting to the stimulating component 420. When the required stimulating component 420 is inserted into the sockets 421 and 422, a stimulator 42 is formed.

[0186] As the stimulating component 420, chips of various shapes that match the sockets 421 and 422 and can apply specified stimulation are prepared in advance. The stimulating component 420 includes stimulating components 420a to 420g. Specifically, the stimulating component 420a applies low-frequency electrical stimulation. The stimulating component 420b applies high-frequency electrical stimulation. The stimulating component 420c applies cold stimulation by cooling and warm stimulation by heating. The stimulating component 420d applies stimulation by vibration. The stimulating component 420e applies auditory stimulation by sound. The stimulating component 420f applies light stimulation by lighting. The stimulating component 420g applies aromatic stimulation with fragrance. The wearer of the wearable device 40 can select the desired stimulation according to their own physical condition, mood, etc., set the stimulating component 420 at the loading and unloading parts of the respective sockets 421 and 422, and use the wearable device 40.

[0187] Figures 16A to 16D It is a diagram showing several steps of installing the stimulating component 420 of this embodiment on the wearable device 40. Figure 16A It shows the wearable device 40 without the stimulating component 420 provided on the main body 110. The stimulating component 420 is not provided in the sockets 421 and 422 inside the arms 430 on both sides of the main body 110.

[0188] The arm 430 is relative to the longitudinal axis of the main body 110 bent in an arc shape at Figure 16BRotate in the direction indicated by the arrow so that the surface provided with the sockets 421 and 422 faces upward to facilitate the insertion and removal of the stimulation member 420. Connection pads connected to the stimulation member 420 may be provided on the bottom surfaces of the sockets 421 and 422, and a latching spring that facilitates the removal of the stimulation member 420.

[0189] In Figure 16C , insert the required stimulation member in the stimulation member 420 into the sockets 421 and 422. The stimulation member 420 does not necessarily need to arrange the same type of stimulation in the same type of configuration in the left and right arms 430, and different types of stimulation members may also be selected in the left and right arms 430. For example, the stimulation members 420i and 420j may be provided in the right arm 430 in the mounted state, and the stimulation members 420a and 420b may be provided in the left arm 430. As the removal mechanism provided in the sockets 421 and 422, instead of the latching spring described with reference to Figure 16B , a holding mechanism based on magnetism may be provided, or notches 425 as shown in Figure 16C may be provided at the edges of the sockets 421 and 422. In Figure 16C 's example, the notches 425 are provided at the centers of the opposite short sides of the sockets 421 and 422, but this is not limited to this example, and they may be provided at any appropriate position along the openings of the sockets 421 and 422.

[0190] In the state where the stimulation member 420 is provided on the main body 110, rotate the arm 430 relative to the main body 110 in the Figure 16D direction indicated by the arrow so that the installation surface of the stimulation member 420 faces inward. The inner surface of the arm 430 is provided with a stimulator 42, and the wearable device 40 is also ready for installation.

[0191] According to the seventh structural example, the position of the arm 430 can be moved, the operation of the arm 430 can be easily performed, and the loading and unloading of the stimulation member 420 can be easily performed. Therefore, the user convenience is improved for the installation and removal operations of the stimulation member 420. Since the surface of the arm 430 into which the stimulation member 420 is inserted can face upward, maintenance such as cleaning becomes easy. As described above, the arm 430 can rotate around the axis relative to the main body 110. In addition, the arm 430 can move in the direction along the axis. Thus, when the wearable device 40 is worn on the neck, the cervical spine stimulator 12a for the nape of the neck can be adjusted (refer to Figure 14)Relative position with the carotid stimulator 42. Since the stimulator can be moved to a position consistent with the wearer's neck, the wearable device 40 can stimulate the wearer more reliably than a wearable device that fixes the stimulator. Since the wearable device 40 has no part protruding upward from the arm 430, the wearable device 40 will not bite into the wearer's jaw during use. Optionally, each arm 430 can be provided with three or more sockets to allow the installation of more types of stimulation components 420, depending on the size of the arm 430 and the size of the sockets (i.e., the size of the stimulation components 420).

[0192] Since the response level to stimulation varies according to the user, the wearable device 40 that can select stimulation suitable for the user can stimulate the user more effectively than a general wearable device equipped with a stimulator. As the use time increases, the response level may decrease due to the body's adaptation to the stimulation. However, according to this structural example, by replacing the stimulation component 420, a new stimulation habit can be reset and the response level can be increased. Since the stimulation components 420 can be selectively combined, there is no need to develop various models. In the case where the stimulation component 420 fails, the stimulation component 420 can be repaired or replaced individually.

[0193] When developing new stimulation, the stimulation components 420 can be purchased individually.

[0194] The stimulation types of the respective stimulation components 420 can be made recognizable. The stimulation types can be easily recognized, for example, by letters or marks, or color differentiation, etc. In addition, the user can be notified of the situation where the settings of the wearable device main body are inconsistent with the types of the stimulator or the stimulation components (if any), so that the user can replace the type of the stimulator in advance. To ensure the operability when installing and removing the stimulation component 420, the outer diameter shape of the stimulation component 420 can be symmetric left and right or symmetric up and down, and it can be installed in any direction. The cylindrical outer diameter of the stimulation component 420 and the cylindrical shapes of the sockets 421 and 422 allow the user to install the stimulation component 420 into the sockets 421 and 422 without worrying about the installation angle. In a structure that restricts the installation position of the stimulation component 420 relative to the main body 110 of the wearable device 40, an anti-reverse installation mechanism using the south and north magnetic poles or an incompatible mechanism using a mechanical shape can be provided. Therefore, the stimulation component 420 can be reliably installed on the main body 110. When the stimulation component 420 is not installed in the sockets 421 and 422, the sockets 421 and 422 can be covered with dummy covers to ensure the appearance.

[0195] Several combination examples of stimulation are described below.

[0196] Table 1 shows several combination examples of stimulation for the wearable device 40. Use Figure 14The stimulators 12a, 42 shown. The stimulator 42 of each arm 430 can apply two types of stimulation.

[0197] Table 1

[0198]

[0199] Example 4 represents, for example, the default stimulation of the wearable device 40. Specifically, the stimulator 12a applies low-frequency electrical stimulation to the left and right of the nape of the neck, and the stimulator 42 applies high-frequency electrical stimulation to the upper sides of the left and right carotid arteries and cold / warm stimulation to the lower sides of the left and right carotid arteries. The stimulation can be freely selected or changed from such default stimulation. In Example 4-1, the stimulations applied to the upper and lower sides of the carotid artery are exchanged. Some users may prefer to receive cold stimulation through cooling and warm stimulation through heating at positions closer to the user's face. In this case, the combination in Example 4-1 is preferred.

[0200] In Example 4-2, all six stimulations applied by the stimulators 12a, 42 represent the same low-frequency electrical stimulation. Such a configuration may also be possible for users who prefer low-frequency electrical stimulation. In Example 4-3, the stimulation components 420 located above and below the carotid artery are different on the left and right of the wearable device 40. Therefore, the wearable device 40 provides asymmetric stimulation. For users who strongly feel uncomfortable with bilaterally symmetric stimulation, the stimulation components 420 can also be configured to provide asymmetric stimulation. Example 4-4 represents a combination of six different stimulations applied by the stimulators 12a and 42. For users who seek more types of stimulation, a combination such as in Example 4-4 can be provided.

[0201] Asymmetric stimulation can be achieved by selecting different stimulation components 420 between the left and right sides or the upper and lower sides of the wearable device 40. For example, some users can be awakened more effectively by different stimulations between the left and right, such as high-frequency electrical stimulation only on the right side and low-frequency electrical stimulation only on the left side.

[0202] As described above, the control of the waking state has been described based on the specific embodiments or examples of the present disclosure, but various changes can be made within the scope of the technical idea of the present invention. In the case where the sensor 115, the communication device 117, and the microprocessor 120 are built into the wearable device 10, the sensor 115, the communication device 117, and the microprocessor 120 may not be connected or configured to the bending portion 101 of the main body 110, but may be connected or configured to appropriate positions of the arm 130. The biological information acquired by the sensor 115 is not limited to heart rate data. Other biological data (e.g., respiratory rate, sweating state, or blink count) can be detected to determine whether the user is tense or relaxed. In addition to or instead of thermal and electrical stimulations, aromatic stimulation, light stimulation, or a combination of these stimulations can be applied. Figure 2The wearable device 10 worn around the neck as shown does not interfere with the user's operations and is effective in controlling the waking state. However, the wearable device according to one or more embodiments of the present invention may be a wearable device worn on the shoulder or forearm.

[0203] The first to seventh structural examples may be combined with each other. For example, the wearable device 40 may further include a stimulator 12b having any configuration among the above-described first to third structural examples. In the seventh structural example, for example, when a part of the stimulating member 420 inserted into the socket protrudes from the contact surface in contact with the carotid artery due to the influence of component deviation, a retracting mechanism for retracting the protruding portion of the stimulating member 420 toward the contact surface may be provided as in the sixth structural example ( Figure 13A , Figure 13B ). As the retracting mechanism, for example, a resin elastic member or a metal spring may be used. The retracting mechanism may have any configuration as long as the stimulating member 420 can be retracted by a certain external pressure.

[0204] Hereinafter, a wearable device according to other embodiments of the present disclosure will be described.

[0205] As described above, the wearable device according to one or more embodiments of the present invention is not limited to a wearable device worn around the neck. In addition, as long as it can measure biological information such as pulse, body temperature, sweating state, etc. and can apply stimulation, it may also be installed on any part of the body other than the neck, such as the wrist, earlobe, fingertip, forearm, thigh, shoulder and back.

[0206] Figure 17 FIG. is a diagram of a wearable device 1000 according to another example of the present disclosure. Figure 18 It shows Figure 17 a diagram of the structure of the wearable device 1000 on the side in contact with the skin. The side of the wearable device 1000 in contact with the skin contacts the user's skin. The wearable device 1000 may be worn on the wrist. The wearable device 1000 has a main body 1001 and a mounting portion 1002. As Figure 18 shown, the main body 1001 includes an operation unit 1003, a stimulator 1004, and a sensor 1005. The stimulator 1004 is positioned to contact, for example, the inner side of the wrist. The sensor 1005 is provided at a position where biological information can be easily obtained, for example, on the inner side of the wrist, or at a position where the sensor 1005 can contact an artery. The operation unit 1003 may be provided on one side of the main body 1001. For example, the operation unit 1003 allows the user to turn on or off the power and adjust the stimulation intensity. The communication device 117 (refer to Figure 3A , Figure 3B ) or the microprocessor 120 (refer to Figure 3C)Built into the main body 1001, the obtained biological information is sent to a remote processor or analyzed within the wearable device 1000. Although Figure 18 A single stimulator 1004 is shown, but the number of stimulators is not limited to one. For example, another stimulator may be provided on the same surface of the main body 1001 where the stimulator 1004 is provided to apply various types of stimuli such as thermal and electrical stimuli.

[0207] Figure 19 FIG. is a diagram of a wearable device 2000 according to another example of the present disclosure. The wearable device 2000 can be worn on the ear. The wearable device 2000 includes a main body 2001, a mounting unit 2002, a stimulator 2003, and a sensor 2004. The main body 2001 includes a communication device 117 or a microprocessor 120.

[0208] The wearable device 2000 may include a speaker as the stimulator 2003. The speaker can apply a sound stimulus to the user. The mounting unit 2002 has an earlobe contact surface through which the mounting unit 2002 contacts the earlobe. For example, when the stimulator 2003 applies a thermal stimulus, the stimulator 2003 is preferably located on the earlobe contact surface of the mounting unit 2002 to easily contact the ear. Similarly, the sensor 2004 is also preferably disposed at a position where the ear (earlobe) can be easily contacted by the mounting unit 2002.

[0209] The wearable devices 1000 and 2000 can apply different types of stimuli or different intensities of the same type of stimulus to the part of the user in contact with the corresponding wearable device based on the user's biological information.

[0210] Descriptions of several aspects of the present disclosure are given below:

[0211] According to a first aspect, a wearable device is worn by a user, the wearable device including: a main body; and a plurality of stimulators located on the main body. The plurality of stimulators apply different types or different intensities of stimuli to the user based on the user's biological information.

[0212] According to a second aspect, in the wearable device according to the first aspect, the plurality of stimulators are configured to generate and apply a first stimulus that increases the arousal level of the user and a second stimulus that decreases the arousal level of the user as the stimuli.

[0213] According to a third aspect, in the wearable device described in the first aspect, the plurality of stimulators include a first stimulator and a second stimulator. The first stimulator is located in a first part of the main body and is configured to generate a first stimulation of the stimulation. The second stimulator is located in a second part of the main body and is configured to generate a second stimulation of the stimulation, the second stimulation being different from the first stimulation. The first stimulator and the second stimulator are arranged circumferentially on the main body or in a direction intersecting the circumferential direction.

[0214] According to a fourth aspect, in the wearable device described in the third aspect, the main body includes: a bent portion; and a pair of arms extending from both ends of the bent portion. The first stimulator is provided in the bent portion of the main body to apply the first stimulation to a first part of the user. The second stimulator is provided on the pair of arms to apply the second stimulation to a second part of the user.

[0215] According to a fifth aspect, in the wearable device described in the third aspect, the first stimulator is provided on an inner surface of the main body. The second stimulator protrudes from the main body in a width direction of the main body.

[0216] According to a sixth aspect, in the wearable device described in the fifth aspect, it further includes a holder that holds the second stimulator so that a stimulation application surface of the second stimulator is inclined with respect to the width direction of the main body. The stimulation application surface is a surface through which the second stimulator applies the second stimulation.

[0217] According to a seventh aspect, in the wearable device described in the sixth aspect, the holder is deformable to adjust an angle of the stimulation application surface with respect to the main body.

[0218] According to an eighth aspect, in the wearable device described in the sixth aspect, the holder detachably holds the second stimulator.

[0219] According to a ninth aspect, in the wearable device described in the third aspect, the second stimulator is surrounded by the first stimulator.

[0220] According to a tenth aspect, in the wearable device described in the ninth aspect, the second stimulator protrudes from a surface of the first stimulator and can retract to a position on the surface of the first stimulator.

[0221] According to an eleventh aspect, in the wearable device described in any one of the first to tenth aspects, it further includes a sensor configured to detect the biological information.

[0222] According to a twelfth aspect, in the wearable device according to any one of the first to tenth aspects, a processor is further included, configured to analyze the biological information and determine the different types of stimuli based on the analysis result of the biological information.

[0223] According to a thirteenth aspect, in the wearable device according to any one of the first to tenth aspects, a communication device is further included, which sends the biological information to an external information processing device outside the wearable device and receives a control signal for driving the plurality of stimulators from the external information processing device.

[0224] According to a fourteenth aspect, in the wearable device according to the first aspect, the plurality of stimulators include at least one stimulator to apply a variable type of stimulus.

[0225] According to a fifteenth aspect, in the wearable device according to the fourteenth aspect, the plurality of stimulators are configured to asymmetrically apply different types or different intensities of stimuli to the user.

[0226] According to a sixteenth aspect, in the wearable device according to the fourteenth aspect, an arm is further included, which is movable relative to the main body at each end of the main body to removably receive a stimulation component for applying different types of stimuli.

[0227] According to a seventeenth aspect, a wakefulness state control system includes a sensor, a stimulation control unit, and a wearable device. The sensor acquires biological information of a user. The stimulation control unit determines a plurality of types of stimuli for controlling the wakefulness state of the user according to the biological information. The wearable device applies the plurality of types of stimuli determined by the stimulation control unit to the user. The wearable device includes: a main body; and stimulators located on the main body to apply the plurality of types of stimuli.

[0228] The above embodiments are illustrative and do not limit the present invention. Therefore, according to the above teachings, many additional modifications and variations are possible. For example, within the scope of the present invention, elements and / or features of different illustrative embodiments can be combined with and / or replaced by each other. Any of the above operations can be performed in various other ways, for example, in an order different from the above order.

[0229] The present disclosure can be implemented in any convenient form, such as using dedicated hardware or a combination of dedicated hardware and software. The present disclosure can be implemented as computer software applied by one or more networked processing devices. The processing facility can be any appropriately programmed device, such as a general-purpose computer, a personal digital assistant, a mobile phone (e.g., a WAP or 3G compatible phone), and so on. Since the present disclosure can be applied as software, each aspect of the present disclosure includes computer software executable on a programmable device. The computer software can be provided to the programmable device using any conventional carrier medium (carrier method). The carrier medium can accommodate transient carrier methods, such as electrical, optical, microwave, acoustic, or radio frequency signals carrying computer code. An example of such a transient method is a TCP / IP signal carrying computer code over an IP network (such as the Internet). The carrier medium can also include a storage medium for storing processor-readable code, such as a floppy disk, a hard disk, a CD-ROM, a tape device, or a solid-state storage device.

[0230] The functions of the elements disclosed herein can be implemented using a circuit or a processing circuit, which includes a general-purpose processor, a dedicated processor, an integrated circuit, an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a field-programmable gate array (FPGA), conventional circuits, and / or a combination thereof, configured or programmed to perform the disclosed functions. A processor is regarded as a processing circuit or a circuit because they include transistors and other circuits therein. In the present disclosure, a circuit, a unit, or a device is hardware that executes or is programmed to execute the functions. The hardware can be any hardware disclosed herein or otherwise known, which is programmed or configured to execute the functions. When the hardware is a processor, it can be considered a type of circuit, and a circuit, a device, or a unit is a combination of hardware and software, and the software is used to configure the hardware and / or the processor.

[0231] This patent application is based on and claims the priority of Japanese Patent Application No. 2022-192274 filed with the Japan Patent Office on November 30, 2022, and Japanese Patent Application No. 2023-173617 filed with the Japan Patent Office on October 5, 2023, the entire disclosures of which are incorporated herein by reference.

[0232] List of Reference Numerals

[0233] 1 Wake state control system

[0234] 10, 10A, 10B, 10C, 30, 30A, 40, 1000, 2000 Wearable device

[0235] 12, 12a, 12b, 12c, 32b, 32c, 32d, 42, 1004, 2003 Stimulator

[0236] 101 Bending part

[0237] 110, 1001, 2001 Main body

[0238] 111, 221A, 221B, 270 Holder

[0239] 115, 1005, 2004 Sensor

[0240] 116 Cable

[0241] 117 Communication device

[0242] 120 Microprocessor

[0243] 121, 122 First electrode

[0244] 123, 124, 323, 324, 423, 424 Second electrode

[0245] 125, 126, 325, 326 Third electrode

[0246] 130 Arm

[0247] 200 Information processing device

[0248] 201 Processor

[0249] 202 Main memory

[0250] 203 Auxiliary memory

[0251] 204 Input / output interface

[0252] 205 Communication interface

[0253] 210 Stimulation control unit

[0254] 211 Biological information acquisition unit

[0255] 212 Target level setting unit

[0256] 213 Data analysis unit

[0257] 214 Stimulation determination unit

[0258] 215 Evaluation acquisition unit

[0259] 221A, 221B, 270 Holder

[0260] 420a~420g, 420i, 420j Stimulation part

[0261] 1002, 2002 Installation unit

[0262] 1003 operating unit

Claims

1. A wearable device configured to be worn by a user, the wearable device comprising: A main body; and A plurality of stimulators located on the main body to apply different types or intensities of stimulation to the user based on the user's biological information.

2. The wearable device according to claim 1, Among them, The plurality of stimulators are configured to generate and apply a first stimulation that increases the user's arousal level and a second stimulation that decreases the user's arousal level as the stimulation.

3. The wearable device according to claim 1, Among them, The plurality of stimulators include: A first stimulator located on a first part of the main body for generating a first stimulation of the stimulation; and A second stimulator located on a second part of the main body for generating a second stimulation of the stimulation, the second stimulation being different from the first stimulation, and Wherein, the first stimulator and the second stimulator are arranged circumferentially on the main body or in a direction intersecting the circumferential direction.

4. The wearable device according to claim 3, Among them, The main body includes: A bent portion; and A pair of arms extending from both ends of the bent portion, Wherein, the first stimulator is provided on the bent portion of the main body to apply the first stimulation to a first part of the user, and Wherein, the second stimulator is provided on the pair of arms to apply the second stimulation to a second part of the user.

5. The wearable device according to claim 3, Among them, The first stimulator is provided on the inner surface of the main body, and Wherein, the second stimulator protrudes from the main body in the width direction of the main body.

6. The wearable device according to claim 5, further comprising a holding member that holds the second stimulator such that a stimulation application surface of the second stimulator is inclined with respect to the width direction of the main body, the stimulation application surface being a surface through which the second stimulator is configured to apply the second stimulation.

7. The wearable device according to claim 6, Among them, The holding member is deformable to adjust an angle of the stimulation application surface with respect to the main body.

8. The wearable device according to claim 6, Among them, The holding member detachably holds the second stimulator.

9. The wearable device according to claim 3, Among them, The second stimulator is surrounded by the first stimulator.

10. The wearable device according to claim 9, Among them, The second stimulator protrudes from the surface of the first stimulator and can retract to a position on the surface of the first stimulator.

11. The wearable device according to any one of claims 1 to 10, further comprising a sensor configured to detect the biological information.

12. The wearable device according to any one of claims 1 to 10, further comprising a processor configured to analyze the biological information and determine the different types of stimulation based on the analysis result of the biological information.

13. The wearable device according to any one of claims 1 to 10, further comprising a communication device configured to: Send the biological information to an external information processing device outside the wearable device; and Receive a control signal for driving the plurality of stimulators from the external information processing device.

14. The wearable device according to claim 1, Among them, The plurality of stimulators includes at least one stimulator to apply a variable type of stimulation.

15. The wearable device according to claim 14, Among them, The plurality of stimulators is configured to asymmetrically apply different types or intensities of stimulation to the user.

16. The wearable device according to claim 14, further comprising an arm that is movable relative to the body at each end of the body to removably receive a stimulation component for applying different types of stimulation.

17. An arousal state control system, comprising: A sensor configured to acquire biometric information of a user; A stimulation control unit configured to determine a plurality of types of stimulation for controlling the arousal state of the user based on the biometric information; and A wearable device configured to apply the plurality of types of stimulation determined by the stimulation control unit to the user, The wearable device includes: A body; and A stimulator located on the body to apply the plurality of types of stimulation.

Images