JP7435293B2 - Brain wave control device and brain wave control system - Google Patents

Description

The present disclosure relates to a brain wave control device and a brain wave control system that control a user's brain waves.

There is a known technique for controlling a user's brain waves by providing the user with an optical signal or sound signal of a predetermined frequency and guiding the user's brain wave frequency to the frequency of the optical signal or sound signal (for example, Patent Document 1). By using such a technique to induce the frequency of the user's brain waves to a low frequency such as 2 to 40 Hz, it is possible to achieve relaxation for the user.

Japanese Unexamined Patent Publication No. 7-194706

When providing a user with a light signal or a sound signal of, for example, 2 to 40 Hz for user relaxation, the blinking of the light signal may be perceived by the user, or the sound signal itself or its vibration may be perceived by the user. , which may cause discomfort to the user. Therefore, it is required to guide the user's brain wave frequency to a predetermined frequency while making it difficult for the user to perceive the frequency itself to be guided.

An object of the present disclosure is to provide a brain wave control device and a brain wave control system that can guide a user's brain wave frequency to a predetermined frequency while making it difficult for the user to perceive the frequency itself to be guided.

According to the brain wave control device according to one aspect of the present disclosure,
a first signal generation circuit that generates a first optical signal using a first light source;
a second signal generation circuit that generates a second optical signal using a second light source;
and a control circuit that controls the first and second signal generation circuits,
The control circuit includes:
The first light source is configured to generate the first optical signal by intermittently lighting the first light source with alternating on periods and off periods at a first switching frequency that is equal to or higher than the critical fusion frequency. controls the signal generation circuit of
a second switching frequency that is equal to or higher than the critical fusion frequency and has a difference equal to a predetermined target frequency with respect to the first switching frequency; The second signal generating circuit is controlled to generate the second optical signal by turning on the second light source intermittently.

Therefore, according to the brain wave control device according to each aspect of the present disclosure, the brain wave control device generates the first and second optical signals with a switching frequency that has a difference equal to the target frequency and is equal to or higher than the critical fusion frequency. The frequency of the user's brain waves can be guided to a predetermined frequency while making it difficult for the user's visual system to perceive the frequency itself.

According to the brain wave control device according to one aspect of the present disclosure,
The brain wave control device includes:
a third signal generation circuit that generates a first sound signal using the first transducer;
further comprising a fourth signal generation circuit that generates a second sound signal using the second transducer,
The control circuit includes:
The third signal generating circuit is configured to generate the first sound signal by intermittently generating a noise sound from the first transducer having an on period and an off period alternating at a third switching frequency. control,
the second transducer intermittently generates a noise sound having alternating on and off periods at a fourth switching frequency having a difference equal to the target frequency with respect to the third switching frequency; The fourth signal generating circuit is controlled to generate the second sound signal.

As a result, according to the brain wave control device according to each aspect of the present disclosure, by generating the first and second sound signals at switching frequencies having a difference equal to the target frequency, the frequency to be guided itself can be changed to the user's frequency. The frequency of the user's brain waves can be guided to a predetermined frequency while making it difficult for the auditory system to perceive it.

According to the brain wave control system according to one aspect of the present disclosure,
the first light source configured to illuminate the right eye of the user with the first light signal;
the second light source configured to illuminate the user's left eye with the second light signal;
the first transducer configured to provide the first sound signal to the right ear of the user;
the second transducer configured to provide the second sound signal to the user's left ear;
and the electroencephalogram control device.

Thus, according to the brain wave control system according to each aspect of the present disclosure, the first and second optical signals are generated at a switching frequency that has a difference equal to the target frequency and is equal to or higher than the critical fusion frequency; By generating the first and second sound signals at switching frequencies that have a difference equal to can be induced to the frequency of

According to the electroencephalogram control device and the electroencephalogram control system according to each aspect of the present disclosure, the first and second optical signals are generated at a switching frequency that has a difference equal to the target frequency and is equal to or higher than the critical fusion frequency; By generating the first and second sound signals at switching frequencies that have an equal difference in frequency, the frequency of the user's brain waves can be adjusted while making it difficult for the user's visual and auditory systems to perceive the frequency itself to be induced. It can be guided to a predetermined frequency.

FIG. 1 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a first embodiment. 2 is a diagram showing exemplary waveforms of optical signals P1, P2 and sound signals A1, A2 generated by the electroencephalogram control system of FIG. 1. FIG. 2 is a diagram showing a first example of mounting the light sources 1, 2 and transducers 3, 4 of FIG. 1. FIG. 2 is a diagram showing a second example of mounting the light sources 1 and 2 and the transducers 3 and 4 of FIG. 1. FIG. 2 is a diagram showing a third example of mounting the light sources 1, 2 and transducers 3, 4 of FIG. 1. FIG. FIG. 2 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a second embodiment. 7 is a flowchart showing an electroencephalogram control process executed by the control circuit 15A of FIG. 6. FIG. 3 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a first modification of the second embodiment. FIG. 3 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a second modification of the second embodiment. FIG. 3 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a third embodiment. 2 is a diagram showing an exemplary configuration of an eye mask 21D for mounting the light sources 1 and 2 and heater 5 of FIG. 1. FIG. 11 is a flowchart showing an electroencephalogram control process executed by the control circuit 15D of FIG. 10.

Hereinafter, each embodiment of the present disclosure will be described with reference to the drawings. Like numerals indicate like components in the drawings.

[Application example]
FIG. 1 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a first embodiment. The brain wave control system in FIG. 1 includes a first light source 1, a second light source 2, a first transducer 3, a second transducer 4, and a brain wave control device 10.

The light source 1 is configured to illuminate the visual system of one eye (for example the right eye) of the user with a first light signal P1. The light source 2 is configured to illuminate the visual system of the user's other eye (for example the left eye) with a second light signal P2.

The transducer 3 is configured to supply a first sound signal A1 to the auditory system of one ear (eg the right ear) of the user. The transducer 4 is configured to supply a second sound signal A2 to the auditory system of the user's other ear (for example the left ear).

The electroencephalogram control device 10 includes a first signal generation circuit 11 , a second signal generation circuit 12 , a third signal generation circuit 13 , a fourth signal generation circuit 14 , and a control circuit 15 .

The signal generation circuit 11 generates an optical signal P1 using the light source 1 under the control of the control circuit 15. The signal generation circuit 12 generates an optical signal P2 using the light source 2 under the control of the control circuit 15.

The signal generation circuit 13 generates the sound signal A1 using the transducer 3 under the control of the control circuit 15. The signal generation circuit 14 generates the sound signal A2 using the transducer 4 under the control of the control circuit 15.

Control circuit 15 controls signal generation circuits 11-14.

The control circuit 15 controls the signal generation circuit 11 to generate the optical signal P1 by intermittently lighting the light source 1 with alternating on periods and off periods at a first switching frequency that is equal to or higher than the critical fusion frequency. control. In addition, the control circuit 15 is configured to alternately turn on at a second switching frequency that is equal to or higher than the critical fusion frequency and that has a difference equal to a predetermined target frequency with respect to the first switching frequency. The signal generation circuit 12 is controlled to generate the optical signal P2 by lighting the light source 2 intermittently with periods and off periods.

Critical Fusion Frequency (CFF) is the minimum frequency of blinking at which when humans see blinking lights, they no longer recognize the blinking and perceive it as continuous light with uniform brightness. means. The critical fusion frequency is typically on the order of 36-38 Hz or higher, but may be lower if there is optic nerve damage, visual impairment, or decreased concentration.

By generating the optical signals P1 and P2 at a switching frequency higher than the critical fusion frequency, it is possible to prevent the user from perceiving the blinking of the optical signals P1 and P2. Furthermore, the difference between the switching frequencies of the optical signals P1 and P2 is equal to the target frequency at which the brain wave frequency is to be induced. By generating the optical signals P1, P2 at switching frequencies with a difference equal to the target frequency and above the critical fusion frequency and providing them to the user's right and left eye visual systems, respectively, the user can cause the optical signals P1, P2 to blink. It is possible to provide stimulation at the target frequency to the user without the user being aware of the target frequency.

The control circuit 15 controls the third signal generation circuit 13 to generate the sound signal A1 by intermittently generating a noise sound from the transducer 3, which has an on period and an off period alternating at a third switching frequency. do. Further, the control circuit 15 causes the transducer 4 to intermittently generate a noise sound having an on period and an off period that alternate at a fourth switching frequency having a difference equal to the target frequency with respect to the third switching frequency. The fourth signal generation circuit 14 is controlled to generate the sound signal A2.

The difference between the third and fourth switching frequencies is also equal to the target frequency at which the brain wave frequency is to be induced. By generating the sound signals A1, A2 at switching frequencies having a difference equal to the target frequency and providing them to the auditory systems of the user's right and left ears, respectively, the sound signals A1, A2 themselves or their vibrations at the target frequency can be transmitted to the user. It is possible to provide stimulation at the target frequency to the user without the user being aware of it.

According to the electroencephalogram control device and the electroencephalogram control system according to each embodiment of the present disclosure, the optical signals P1 and P2 are generated at a switching frequency that has a difference equal to the target frequency and is equal to or higher than the critical fusion frequency. By generating sound signals A1 and A2 with switching frequencies that have an equal difference, the frequency of the user's brain waves is guided to a predetermined frequency while making it difficult for the user's visual and auditory systems to perceive the frequency itself to be guided. can do.

[First embodiment]
[Configuration of first embodiment]
Further details of the electroencephalogram control system according to the first embodiment will be described below with reference to FIGS. 1 to 5.

Referring to FIG. 1, the light sources 1, 2 are each configured to generate a light signal P1, P2 containing a component of white noise or pink noise, for example. The light sources 1, 2 thus emit, for example, white light or substantially white light.

The signal generation circuits 13 and 14 generate, for example, sound signals A1 and A2 containing white noise or pink noise components using transducers 3 and 4, respectively.

The control circuit 15 includes a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), etc., and controls each component according to information processing.

The brain wave control device 10 may further include an input device 16 to set a desired target frequency. Input device 16 includes, for example, a keyboard and/or a pointing device.

The signal generation circuits 11 to 14 and the control circuit 15 may be configured as separate circuits, may be configured as an integrated circuit, or may be implemented as a program executed by a general-purpose processor.

FIG. 2 is a diagram showing exemplary waveforms of optical signals P1, P2 and sound signals A1, A2 generated by the electroencephalogram control system of FIG. 1.

The optical signal P1 has a period T1 and an amplitude a1. Each cycle of the optical signal P1 has an on period of length Ton1 and an off period of length Toff1. Therefore, the optical signal P1 has a switching frequency f1=1/T1 and a duty ratio d1=Ton1/T1.

The optical signal P2 has a period T2 and an amplitude a2. Each cycle of optical signal P2 has an on period of length Ton2 and an off period of length Toff2. Therefore, the optical signal P2 has a switching frequency f2=1/T2 and a duty ratio d2=Ton2/T2.

The sound signal A1 has a period T3 and an amplitude a3. Each cycle of the sound signal A1 has an on period of length Ton3 and an off period of length Toff3. Therefore, the sound signal A1 has a switching frequency f3=1/T3 and a duty ratio d3=Ton3/T3.

The sound signal A2 has a period T4 and an amplitude a4. Each cycle of the sound signal A2 has an on period of length Ton4 and an off period of length Toff4. Therefore, the sound signal A2 has a switching frequency f4=1/T4 and a duty ratio d4=Ton4/T4.

As described above, the switching frequency f1=1/T1 of the optical signal P1 and the switching frequency f2=1/T2 of the optical signal P2 are equal to or higher than the critical fusion frequency. Further, the difference between the switching frequencies of the optical signals P1 and P2 |f1−f2|=|1/T1−1/T2| is equal to the target frequency. Further, the difference between the switching frequencies of the sound signals A1 and A2 |f3−f4|=|1/T3−1/T4| is equal to the target frequency.

The control circuit 15 may control the signal generation circuit so that the optical signals P1 and P2 have variable switching frequencies f1 and f2, respectively. Further, the control circuit 15 may control the signal generation circuits 13 and 14 so that the sound signals A1 and A2 have variable switching frequencies f3 and f4, respectively. By changing the switching frequencies f1 to f4, a switching frequency that is highly effective in guiding the user's brain waves can be found, and an optical signal and a sound signal can be generated at the switching frequency.

The control circuit 15 may control the signal generation circuit so that the optical signals P1 and P2 have variable duty ratios d1 and d2, respectively. Further, the control circuit 15 may control the signal generation circuits 13 and 14 so that the sound signals A1 and A2 have variable duty ratios d3 and d4, respectively. By increasing the duty ratio, the stimulation of the optical signal and sound signal to the user can be strengthened, and the effect of guiding the user's brain waves can be enhanced. Furthermore, power consumption can be reduced by reducing the duty ratio.

The control circuit 15 may control the signal generation circuit so that the optical signals P1 and P2 have variable signal strengths (for example, amplitudes a1 and a2), respectively. Further, the control circuit 15 may control the signal generation circuits 13 and 14 so that the sound signals A1 and A2 have variable signal strengths (for example, amplitudes a3 and a4), respectively. By increasing the signal strength, the stimulation of the optical signal and the sound signal to the user can be strengthened, and the effect of guiding the user's brain waves can be enhanced. Furthermore, power consumption can be reduced by reducing signal strength.

The control circuit 15 also controls the signal generation circuits 11 to 14 so that the sound signal A1 is asynchronous to the optical signals P1 and P2, and the sound signal A2 is asynchronous to the optical signals P1 and P2. It's okay. The control circuit 15 controls the signal generation circuits 11 and 13 so that the sound signal A1 is synchronized with the optical signal P1, and controls the signal generation circuits 12 and 14 so that the sound signal A2 is synchronized with the optical signal P2. You may. By synchronizing or desynchronizing the optical signal and the sound signal with each other in this way, it is possible to discover a phase difference that is highly effective in guiding the user's brain waves, and to generate the optical signal and the sound signal at a switching frequency that has the phase difference. can.

It is known that the human brain enters the following states depending on the frequency of brain waves.

・Gamma waves (100Hz, 70Hz, 40Hz): A state that indicates thoughts of awareness, awakening, and enlightenment. A state that activates the right and left hemispheres, enhances the function of the diencephalon, and calmly regulates the autonomic nervous system, hormonal balance, and emotional changes.
・Beta waves (14-26Hz): A state that indicates cerebral activity during times of tension, anxiety, and irritability.
・Fast alpha waves (12-14Hz): A state of tense concentration and not much relaxation.
・Mid-alpha waves (9-12Hz): A state of being relaxed without tension, focused, and clear-headed.
・Slow alpha waves (8 to 9 Hz): A state of concentration in the direction of rest, decreased consciousness, and a state of being absent-minded.
- Schumann resonance wave (7.8Hz): Wave that resonates with the earth. A state that adjusts the biological rhythms of the brain, consciousness, and body.
・Theta waves (4-8Hz): A state of light sleep and a state of considerably decreased consciousness.
・Delta waves (0.4-4Hz): A state of deep sleep and no consciousness at all.

For example, when the target frequency is set to 40 Hz, the switching frequency f1 of the optical signal P1 may be set to 200 Hz, and the switching frequency f2 of the optical signal P2 may be set to 240 Hz. Further, in this case, the switching frequency f3 of the sound signal A1 may be set to 200 Hz, and the switching frequency f4 of the sound signal A2 may be set to 240 Hz.

The lower limit of switching frequencies f1 and f2 is set to the critical fusion frequency. Further, the lower limit of the switching frequencies f3 and f4 is set to an arbitrary non-zero frequency that can provide stimulation of the target frequency to the user as the difference between them. On the other hand, the upper limit of the switching frequencies f1 to f4 is set, for example, to 100 times or less, preferably 10 times or less, of the target frequency.

FIG. 3 is a diagram showing a first example of mounting the light sources 1, 2 and transducers 3, 4 of FIG. 1. The light sources 1, 2 may be integrated into the eye mask 21. Light source 1 is configured to irradiate right eye 101 of user 100 with optical signal P1, and light source 2 is configured to irradiate left eye 102 of user 100 with optical signal P2. Further, the transducers 3 and 4 may be incorporated into the headphones 22. Transducer 3 is configured to provide sound signal A1 to right ear 103 of user 100, and transducer 4 is configured to provide sound signal A2 to left ear 104 of user 100.

FIG. 4 is a diagram showing a second example of how the light sources 1 and 2 and the transducers 3 and 4 shown in FIG. 1 are mounted. In FIG. 4, light sources 1A and 2A integrated into eyeglasses 23 are shown in place of the light sources 1 and 2 in FIG. Also in the case of FIG. 4, the light source 1A is configured to irradiate the right eye 101 of the user 100 with the optical signal P1, and the light source 2A is configured to irradiate the left eye 102 of the user 100 with the optical signal P2. Moreover, in FIG. 4, transducers 3A and 4A incorporated in the earphone are shown in place of the transducers 3 and 4 in FIG. Also in FIG. 4, transducer 3A is configured to provide sound signal A1 to right ear 103 of user 100, and transducer 4A is configured to provide sound signal A2 to left ear 104 of user 100. Ru.

FIG. 5 is a diagram showing a third example of mounting the light sources 1, 2 and transducers 3, 4 of FIG. 1. FIG. 5 shows light sources 1B and 2B that irradiate optical signals P1 and P2 over a wider range than in the case of FIG. 4, in place of the light sources 1A and 2A of FIG. In addition to irradiating the right eye 101 and left eye 102 of the user 100 with optical signals P1 and P2, the light sources 1B and 2B irradiate body parts other than the right eye 101 and left eye 102 of the user 100 with the optical signals P1 and P2. It is configured as follows. Thereby, the glare of the optical signal can be reduced more than in the case of FIG.

[Effects of the first embodiment]
According to the electroencephalogram control system according to the first embodiment, the optical signals P1 and P2 are generated at a switching frequency that has a difference equal to the target frequency and is higher than or equal to the critical fusion frequency, and the switching frequency that has a difference equal to the target frequency is generated. By generating sound signals A1 and A2 at frequencies, it is possible to guide the user's brain wave frequency to a predetermined frequency while making it difficult for the user's visual system and auditory system to perceive the frequency itself.

Further, according to the brain wave control system according to the first embodiment, since the optical signals P1, P2 and the sound signals A1, A2 including white noise or pink noise can be used, the brain waves can be controlled by the white noise or pink noise. can be effectively guided.

Further, according to the brain wave control system according to the first embodiment, it is possible to change the switching frequencies f1 and f2 while keeping the difference |f1−f2| between the switching frequencies of the optical signals P1 and P2 constant. . Similarly, the switching frequencies f3 and f4 can be changed while keeping the difference |f3−f4| between the switching frequencies of the sound signals A1 and A2 constant. When the user 100 becomes accustomed to the optical signals P1, P2 and the sound signals A1, A2, the effect of inducing brain waves may be impaired. However, by changing the switching frequencies f1 to f4, the effect of inducing brain waves can be continuously obtained without the user 100 getting used to the optical signals P1, P2 and the sound signals A1, A2.

[Second embodiment]
[Configuration of second embodiment]
FIG. 6 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to the second embodiment. The electroencephalogram control system in FIG. 6 includes light sources 1 and 2, transducers 3 and 4, an electroencephalogram control device 10A, an electroencephalograph 31, and a headset 32.

The electroencephalograph 31 measures the brain waves of the user 100 using the headset 32, and sends the measured brain wave data to the electroencephalogram control device 10A. The electroencephalograph 31 and the electroencephalogram control device 10A may be connected by wire or wirelessly.

The brain wave control device 10A includes a control circuit 15A and a storage device 17 in place of the control circuit 15 of the brain wave control device 10 in FIG.

The control circuit 15A controls the signal generation circuits 11 to 14 in the same way as the control circuit 15 in FIG. Execute processing. In the brain wave control process of FIG. 7, the parameters (switching frequency, signal strength, and/or duty ratio, etc.) of the optical signals P1, P2 and the sound signals A1, A2 are changed to adjust the frequency of the user's 100 brain waves to the target frequency. Determine the optimal parameters for induction.

The storage device 17 stores the optimal parameters of the optical signals P1, P2 and the sound signals A1, A2 (i.e., the switching when the frequency of the brain waves reaches the target frequency) determined by executing the brain wave control process for a certain user 100. combination of frequency, signal strength, and duty ratio). The storage device 17 also stores parameters (i.e., switching frequency, signal strength, and duty ratio) that were effective for guiding the brain wave frequency when the brain wave control process was previously executed for a certain user 100. The order may also be stored. Here, "effective" means, for example, that the frequency of the brain waves reaches the target frequency faster, or that the frequency of the brain waves changes more when each parameter changes by a predetermined ratio. The storage device 17 is, for example, a medium such as a hard disk drive or solid state drive that stores data by electrical, magnetic, optical, mechanical, or chemical action.

The light sources 1 and 2 and transducers 3 and 4 of FIG. 6 are also attached to the user 100 as shown in FIGS. 3 to 5, but are omitted in FIG. 6 for simplicity of illustration.

[Operation of second embodiment]
FIG. 7 is a flowchart showing the electroencephalogram control process executed by the control circuit 15A of FIG.

In step S1, the control circuit 15A obtains identification information (ID) of the user 100 whose brain waves are to be induced from the input device 16. In step S2, the control circuit 15A sets a target frequency of brain waves based on the user input obtained from the input device 16.

In step S3, the control circuit 15A determines whether or not the parameters of the user 100 whose brain waves are to be induced are stored in the storage device 17. If YES, the process proceeds to step S4; if NO, the process proceeds to step S5. move on. In step S4, the control circuit 15A reads the parameters of the user 100 from the storage device 17.

In step S5, the control circuit 15A sets initial values of the parameters of the optical signals P1, P2 and the sound signals A1, A2, that is, the switching frequency, signal strength, and duty ratio, in the signal generation circuits 11 to 14. If step S3 is YES, the control circuit 15A sets the optimal parameters of the optical signals P1, P2 and sound signals A1, A2 read from the storage device 17 as initial values in the signal generation circuits 11 to 14. . If step S3 is NO, the control circuit 15A sets any predetermined initial value to the signal generation circuits 11-14.

After that, the control circuit 15A acquires the brain waves of the user 100, to which the optical signals P1 and P2 are irradiated and the sound signals A1 and A2 are supplied, from the electroencephalograph 31.

In step S6, the control circuit 15A determines whether the frequency of the brain waves has reached the target frequency. If YES, the process proceeds to step S9; if NO, the process proceeds to step S7. Here, when the difference between the brain wave frequency and the target frequency is less than or equal to a predetermined threshold, it may be determined that the brain wave frequency has reached the target frequency. Furthermore, when the brain waves include a frequency lower than the target frequency, it may be determined that the frequency of the brain waves has reached the target frequency.

In step S7, the control circuit 15A determines whether a predetermined period of time has elapsed and timed out. If YES, the process proceeds to step S8; if NO, the process returns to step S6.

In step S8, the control circuit 15A changes at least one of the parameters of the optical signals P1, P2 and the sound signals A1, A2 to induce the brain wave frequency to the target frequency. 14. If step S3 is YES, the control circuit 15A changes the different parameters (ie, switching frequency, signal strength, and duty ratio) in the order that they are effective for inducing the brain wave frequency. If step S3 is NO, the control circuit 15A changes the different parameters in a predetermined order. The control circuit 15A may, for example, sweep the parameter so that it increases or decreases from the initial value, or may change the parameter using a steepest slope method or the like.

In step S9, the control circuit 15A stores the current parameters (that is, the optimal parameters) of the optical signals P1, P2 and the sound signals A1, A2 in the storage device 17 in association with the identification information of the user 100. Further, the control circuit 15A may store parameters that are effective for guiding the frequency of brain waves in the storage device 17 in association with the identification information of the user 100.

By executing the brain wave control process shown in FIG. 7, it is possible to determine the extent to which the frequency of the brain waves has been guided to the target frequency, and to determine optimal parameters for the optical signals P1, P2 and the sound signals A1, A2. Thereby, the effect of guiding the user's brain waves can be enhanced compared to the case where brain waves are not referred to. Furthermore, the user's brain waves can be automatically guided according to the user's condition.

Further, according to the brain wave control process shown in FIG. 7, the degree to which the brain wave frequency is guided to the target frequency is determined, and based on the past optimal parameters and past guidance results for the same user 100, the optical signal P1, Optimal parameters for P2 and sound signals A1 and A2 can be determined. By setting the past optimal parameters as initial values, and by changing the parameters in the order that was effective for guiding the brain wave frequency, compared to not referring to the past guidance results, The user's brain waves can be effectively guided in a short period of time. Furthermore, the user's brain waves can be automatically guided according to the user's condition.

[Modification of second embodiment]
FIG. 8 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a first modification of the second embodiment. The electroencephalogram control system in FIG. 8 includes light sources 1 and 2, transducers 3 and 4, an electroencephalogram control device 10B, an electroencephalogram measurement device 30, and a headset 32.

The brain wave control device 10B includes a control circuit 15B in place of the control circuit 15 and input device 16 of the brain wave control device 10 in FIG. The control circuit 15B controls the signal generation circuits 11 to 14 under the control of the electroencephalogram measuring device 30, similarly to the control circuit 15 in FIG. The brain wave control device 10B and the brain wave measurement device 30 may be connected by wire or wirelessly.

The electroencephalogram measuring device 30 includes an electroencephalograph 31, a control circuit 33, an input device 34, and a storage device 35. The electroencephalograph 31, input device 34, and storage device 35 in FIG. 8 are configured similarly to the electroencephalograph 31, input device 16, and storage device 17 in FIG. The control circuit 33 executes the electroencephalogram control process shown in FIG. 7, generates control signals indicating parameters of the optical signals P1 and P2 and the sound signals A1 and A2, and sends them to the control circuit 15B of the electroencephalogram control device 10B.

As shown in FIG. 8, by executing the electroencephalogram control process by the external control circuit 33 of the electroencephalogram control device 10B, the electroencephalogram control system can be configured with a high degree of freedom.

FIG. 9 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to a second modification of the second embodiment. The electroencephalogram control system in FIG. 9 includes light sources 1 and 2, transducers 3 and 4, an electroencephalogram control device 10B, an electroencephalogram measurement device 30C, a server device 40, and a headset 32.

The electroencephalogram control device 10B in FIG. 9 is configured similarly to the electroencephalogram control device 10B in FIG. 8.

The electroencephalogram measurement device 30C includes a control circuit 33C and a communication circuit 36 in place of the control circuit 33 and storage device 35 of the electroencephalogram measurement device 30 in FIG. The communication circuit 36 is connected to the server device 40 via the Internet 200. The control circuit 33C communicates with the server device 40 via the communication circuit 36 and the Internet 200. Thereby, the control circuit 33C transmits the brain wave data measured by the electroencephalograph 31 to the server device 40, and also sends data indicating the result of the brain wave control process executed by the control circuit 42 (described later) of the server device 40. receive. The control circuit 33C generates control signals indicating the parameters of the optical signals P1, P2 and the sound signals A1, A2 based on the data indicating the results of the electroencephalogram control processing received from the server device 40, and controls the electroencephalogram control device 10B. It is sent to circuit 15B.

The server device 40 includes a communication circuit 41, a control circuit 42, and a storage device 43. The communication circuit 41 is connected to the electroencephalogram measuring device 30C via the Internet 200. The control circuit 42 communicates with the electroencephalogram measuring device 30C via the communication circuit 41 and the Internet 200. Thereby, the control circuit 42 receives brain wave data from the brain wave measuring device 30C. Further, the control circuit 42 executes the electroencephalogram control process shown in FIG. 7, and transmits data indicating the result to the electroencephalogram measurement device 30C. The storage device 43 stores parameters determined by executing the electroencephalogram control process.

The communication circuits 36 and 41 may be connected by wire or wirelessly.

As shown in FIG. 9, the brain wave control system can be configured with a high degree of freedom by executing the brain wave control process by the control circuit 42 external to the brain wave control device 10B.

[Effects of the second embodiment]
According to the brain wave control system according to the second embodiment, the effect of guiding the user's brain waves can be enhanced compared to the case where brain waves are not referred to. Furthermore, the user's brain waves can be automatically guided according to the user's condition.

[Third embodiment]
[Configuration of third embodiment]
FIG. 10 is a block diagram showing an exemplary configuration of an electroencephalogram control system according to the third embodiment. The electroencephalogram control system in FIG. 10 includes light sources 1 and 2, transducers 3 and 4, a heater 5, an electroencephalogram control device 10D, an electroencephalograph 31, and a headset 32.

The heater 5 receives power from the brain wave control device 10D and generates heat of, for example, 40 to 50°C.

The brain wave control device 10D includes a control circuit 15D and a drive circuit 18 in place of the control circuit 15 of the brain wave control device 10 in FIG.

The control circuit 15D controls the signal generation circuits 11 to 14 in the same way as the control circuit 15 in FIG. Execute processing. In the brain wave control process of FIG. 12, when the frequency of brain waves is guided to the target frequency, heat and/or scent is generated for further relaxation.

The drive circuit 18 supplies power to the heater 5 under the control of the control circuit 15D.

FIG. 11 is a diagram showing an exemplary configuration of an eye mask 21D to which the light sources 1 and 2 and heater 5 of FIG. 1 are attached. The eye mask 21D includes light sources 1 and 2, a heater 5, and a pocket 51. Pocket 51 is configured to accommodate a container 52 for aromatherapy essential oils. In the example of FIG. 11, when the heater 5 generates heat, the vicinity of the eyeballs of the user 100 wearing the eye mask 21D is warmed, and at the same time, the essential oil in the container 52 is also heated, producing a fragrance.

[Operation of third embodiment]
FIG. 12 is a flowchart showing the electroencephalogram control process executed by the control circuit 15D of FIG. 10.

In step S11, the control circuit 15D sets a target frequency of brain waves based on the user input obtained from the input device 16.

After that, the control circuit 15A acquires the brain waves of the user 100, to which the optical signals P1 and P2 are irradiated and the sound signals A1 and A2 are supplied, from the electroencephalograph 31.

In step S12, the control circuit 15D determines whether the frequency of the brain waves has reached the target frequency. If YES, the process proceeds to step S13; if NO, step S12 is repeated.

In step S13, the control circuit 15D supplies power to the heater 5.

[Effects of the third embodiment]
According to the brain wave control system according to the third embodiment, further relaxation of the user can be realized by generating heat and/or scent when the frequency of brain waves is guided to the target frequency.

The electroencephalogram control process according to the second embodiment and the electroencephalogram control process according to the third embodiment may be combined. In this case, when step S6 in FIG. 7 is YES, the control circuit executes step S13 in FIG. 12 in addition to step S9 in FIG.

The heater 5 and the container 52 may be incorporated into an article other than an eye mask that is worn on the user's 100 body.

[Modified example]
Although the embodiments of the present disclosure have been described in detail above, the above descriptions are merely illustrative of the present disclosure in all respects. It goes without saying that various improvements and modifications can be made without departing from the scope of the present disclosure. For example, the following changes are possible. In addition, below, the same code|symbol is used regarding the same component as the said embodiment, and description is abbreviate|omitted suitably about the same point as the said embodiment. The following modified examples can be combined as appropriate.

In the electroencephalogram control process of FIG. 7, steps S1, S3, S4, and S9 may be omitted. In this case, the storage device 17, 35, or 43 can be omitted and the configuration of the device can be simplified.

The brainwave control system may be configured to generate only one of the optical signal and the sound signal. When only optical signals are generated, the brain wave control system includes, for example, the light sources 1 and 2, the signal generation circuit 11, the signal generation circuit 12, and the control circuit 15 shown in FIG. Similarly, when only sound signals are generated, the electroencephalogram control system includes, for example, the transducers 3 and 4, the signal generation circuit 13, the signal generation circuit 14, and the control circuit 15 shown in FIG. Even in these cases, the frequency of the user's brain waves can be guided to a predetermined frequency while making it difficult for the user's visual system or auditory system to perceive the frequency itself to be guided.

[summary]
The electroencephalogram control device and electroencephalogram control system according to each aspect of the present disclosure may be expressed as follows.

According to the brain wave control device according to one aspect of the present disclosure, the brain wave control device 10 includes a first signal generation circuit 11 that generates the first optical signal P1 using the first light source 1, and a second light source. 2, and a control circuit 15 that controls the first and second signal generation circuits 11 and 12. The control circuit 15 generates the first optical signal P1 by intermittently lighting the first light source 1 with alternating on and off periods at a first switching frequency that is equal to or higher than the critical fusion frequency. The first signal generating circuit 11 is controlled as follows. The control circuit 15 has on-periods alternating with a second switching frequency that is equal to or higher than the critical fusion frequency and has a difference from the first switching frequency equal to a predetermined target frequency; The second signal generation circuit 12 is controlled to generate the second optical signal P2 by lighting the second light source 2 intermittently with off periods.

According to the brain wave control device according to one aspect of the present disclosure, the first and second optical signals P1 and P2 each include white noise or pink noise components.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15 connects the first and second signal generation circuits so that the first and second optical signals P1 and P2 have variable duty ratios, respectively. control.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15 connects the first and second signal generation circuits so that the first and second optical signals P1 and P2 have variable signal intensities, respectively. 11 and 12.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15A acquires the frequency of the brain waves of the user 100 to which the first and second optical signals P1 and P2 are irradiated. The control circuit 15A includes a first switching frequency, a signal strength of the first and second optical signals P1, P2, and a duty ratio of the first and second optical signals P1, P2. By changing at least one of the parameters of the second optical signals P1 and P2, the first and second signal generation circuits 11 and 12 are controlled so as to induce the frequency of the brain waves to the target frequency.

According to the brain wave control device according to one aspect of the present disclosure, the brain wave control device 10A includes a storage device 17 that stores parameters of the first and second optical signals P1 and P2 when the frequency of the brain waves reaches the target frequency. Furthermore, it is equipped with. The control circuit 15A sets the parameters of the first and second optical signals P1 and P2 when the frequency of the brain waves reaches the target frequency as initial values in the first and second signal generation circuits 11 and 12.

According to the brain wave control device according to one aspect of the present disclosure, the storage device 17 stores the order of parameters of the first and second optical signals P1 and P2 that are effective for inducing the frequency of brain waves. , the control circuit 15A changes the parameters of the first and second optical signals P1 and P2 in an order that is effective for inducing the brain wave frequency.

According to the brain wave control device according to one aspect of the present disclosure, the brain wave control device 10 includes a third signal generation circuit 13 that generates the first sound signal A1 using the first transducer 3, and a third signal generation circuit 13 that generates the first sound signal A1 using the first transducer 3. The fourth signal generating circuit 14 generates the second sound signal A2 using the second sound signal A2. The control circuit 15 controls the third switching frequency so that the first transducer 3 generates the first sound signal A1 by intermittently generating a noise sound having an on period and an off period alternating at a third switching frequency. Controls the signal generation circuit 13. The control circuit 15 is configured to intermittently generate a noise sound from the second transducer 4 having alternating on and off periods at a fourth switching frequency having a difference equal to the target frequency with respect to the third switching frequency. The fourth signal generation circuit 14 is controlled to generate the second sound signal A2.

According to the brain wave control device according to one aspect of the present disclosure, the first and second sound signals A1 and A2 each include white noise or pink noise components.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15 connects the third and fourth signal generation circuits so that the first and second sound signals A1 and A2 have variable duty ratios, respectively. 13 and 14 are controlled.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15 controls the third and fourth signal generation circuits so that the first and second sound signals A1 and A2 have variable signal strengths, respectively. 13 and 14 are controlled.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15A acquires the frequency of the brain waves of the user 100 to which the first and second sound signals A1 and A2 are supplied. The control circuit 15A includes a first switching frequency including third and fourth switching frequencies, signal intensities of the first and second sound signals A1 and A2, and duty ratios of the first and second sound signals A1 and A2. By changing at least one of the parameters of the second sound signals A1 and A2, the third and fourth signal generation circuits 13 and 14 are controlled so as to induce the frequency of the brain waves to the target frequency.

According to the brain wave control device according to one aspect of the present disclosure, the brain wave control device 10A includes a storage device 17 that stores parameters of the first and second sound signals A1 and A2 when the frequency of the brain waves reaches the target frequency. Furthermore, it is equipped with. The control circuit 15A sets the parameters of the first and second sound signals A1 and A2 when the frequency of the brain waves reaches the target frequency as initial values in the third and fourth signal generation circuits 13 and 14.

According to the brain wave control device according to one aspect of the present disclosure, the storage device 17 stores the order of parameters of the first and second sound signals A1 and A2 that were effective for inducing the frequency of brain waves. . The control circuit 15A changes the parameters of the first and second sound signals A1, A2 in an order that is effective for inducing the brain wave frequency.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15 controls the first and third signal generation circuits 11 and 13 so that the first sound signal A1 is synchronized with the first optical signal P1. Control. The control circuit 15 controls the second and fourth signal generation circuits 12 and 14 so that the second sound signal A2 is synchronized with the second optical signal P2.

According to the brain wave control device according to one aspect of the present disclosure, the control circuit 15 controls the first sound signal A1 to be asynchronous to the first and second optical signals P1 and P2, and The first to fourth signal generation circuits 14 are controlled so that the signal A2 is asynchronous to the first and second optical signals P1 and P2.

According to the brain wave control system according to one aspect of the present disclosure, the brain wave control system includes a first light source 1 configured to irradiate the right eye 101 of the user 100 with the first optical signal P1, and a left eye of the user 100. a second light source 2 configured to irradiate a second optical signal P2 to the right ear 102; a first transducer 3 configured to provide a first sound signal A1 to the right ear 103 of the user 100; , a second transducer 4 configured to supply a second sound signal A2 to a left ear 104 of a user 100, and an electroencephalogram control device 10.

According to the electroencephalogram control system according to one aspect of the present disclosure, the first and second light sources 1 and 2 are incorporated into the eye mask 21.

According to the brain wave control system according to one aspect of the present disclosure, the brain wave control system further includes a heater 5 built into the eye mask 32D. The control circuit 15D acquires the brain waves of the user 100 to which the first and second optical signals P1 and P2 are irradiated and the first and second sound signals A1 and A2 are supplied. The control circuit 15D causes the heater 5 to generate heat when the frequency of the brain waves reaches the target frequency.

According to the brain wave control system according to one aspect of the present disclosure, the eye mask 21D is configured to be able to accommodate the container 52 for aromatherapy essential oil.

According to the electroencephalogram control system according to one aspect of the present disclosure, the first and second light sources 1A and 2A are integrated into the glasses 23.

According to the brain wave control system according to one aspect of the present disclosure, the first and second light sources 1B and 2B irradiate the right eye 101 and left eye 102 of the user 100 with the first and second optical signals P1 and P2, respectively. In addition, it is configured to irradiate body parts other than the right eye 101 and left eye 102 of the user 100 with the first and second optical signals P1 and P2.

According to the electroencephalogram control system according to one aspect of the present disclosure, the first and second transducers 3 and 4 are incorporated into the headphones 22. Moreover, the first and second transducers 3A and 4A are incorporated into the earphone.

The present disclosure is applicable to relaxation products that relieve stress for users. The present disclosure is also applicable, for example, for the prevention of mild cognitive impairment.

1, 1A, 1B First light source 2, 2A, 2B Second light source 3, 3A First transducer 4, 4A Second transducer 5 Heater 10, 10A to 10D Brain wave control device 11 First signal generation circuit 12 Second signal generation circuit 13 Third signal generation circuit 14 Fourth signal generation circuit 15, 15A to 15D Control circuit 16 Input device 17 Storage device 18 Drive circuit 21, 21D Eye mask 22 Headphones 23 Glasses 30 Brain wave measurement device 31 Electroencephalograph 32 Headset 33, 33C Control circuit 34 Input device 35 Storage device 36 Communication circuit 40 Server device 41 Communication circuit 42 Control circuit 43 Storage device 51 Pocket 52 Container 100 User 101 Right eye 102 Left eye 103 Right ear 104 Left ear 200 Internet

Claims (23)

a first signal generation circuit that generates a first optical signal using a first light source;
a second signal generation circuit that generates a second optical signal using a second light source;
An electroencephalogram control device comprising a control circuit that controls the first and second signal generation circuits,
The control circuit includes:
The first light source is configured to generate the first optical signal by intermittently lighting the first light source with alternating on periods and off periods at a first switching frequency that is equal to or higher than the critical fusion frequency. controls the signal generation circuit of
a second switching frequency that is equal to or higher than the critical fusion frequency and has a difference equal to a predetermined target frequency with respect to the first switching frequency; controlling the second signal generation circuit to generate the second optical signal by intermittently lighting the second light source ,
obtaining the frequency of the brain waves of the user to which the first and second optical signals are irradiated;
the first and second switching frequencies, the signal intensities of the first and second optical signals, and the duty ratios of the first and second optical signals based on the frequency of the user's brain waves. controlling the first and second signal generation circuits to induce the frequency of the brain waves to the target frequency by changing at least one of the parameters of the first and second optical signals;
The brain wave control device further includes a storage device that stores parameters of the first and second optical signals when the frequency of the brain waves reaches the target frequency,
The control circuit sets parameters of the first and second optical signals as initial values in the first and second signal generation circuits when the frequency of the brain waves reaches the target frequency.
Brain wave control device. The control circuit controls the first and second signal generation circuits so that the first and second optical signals each have a variable duty ratio.
The electroencephalogram control device according to claim 1 . the control circuit controls the first and second signal generation circuits so that the first and second optical signals each have variable signal strength;
The electroencephalogram control device according to claim 1 or 2 . the storage device stores an order of parameters of the first and second optical signals that were effective for inducing the frequency of the brain waves;
the control circuit varies parameters of the first and second optical signals in an order that is effective for inducing the frequency of the brain waves;
The electroencephalogram control device according to claim 1 . The brain wave control device includes:
a third signal generation circuit that generates a first sound signal using the first transducer;
further comprising a fourth signal generation circuit that generates a second sound signal using the second transducer,
The control circuit includes:
The third signal generating circuit is configured to generate the first sound signal by intermittently generating a noise sound from the first transducer having an on period and an off period alternating at a third switching frequency. control,
the second transducer intermittently generates a noise sound having alternating on and off periods at a fourth switching frequency having a difference equal to the target frequency with respect to the third switching frequency; controlling the fourth signal generation circuit to generate a second sound signal;
The electroencephalogram control device according to claim 1 . a first signal generation circuit that generates a first optical signal using a first light source;
a second signal generation circuit that generates a second optical signal using a second light source;
a third signal generation circuit that generates a first sound signal using the first transducer;
a fourth signal generation circuit that generates a second sound signal using a second transducer;
An electroencephalogram control device comprising a control circuit that controls the first to fourth signal generation circuits,
The control circuit includes:
The first light source is configured to generate the first optical signal by intermittently lighting the first light source with alternating on periods and off periods at a first switching frequency that is equal to or higher than the critical fusion frequency. controls the signal generation circuit of
a second switching frequency that is equal to or higher than the critical fusion frequency and has a difference equal to a predetermined target frequency with respect to the first switching frequency; controlling the second signal generation circuit to generate the second optical signal by intermittently lighting the second light source,
The third signal generating circuit is configured to generate the first sound signal by intermittently generating a noise sound from the first transducer having an on period and an off period alternating at a third switching frequency. control,
the second transducer intermittently generates a noise sound having alternating on and off periods at a fourth switching frequency having a difference equal to the target frequency with respect to the third switching frequency; controlling the fourth signal generation circuit to generate a second sound signal;
obtaining the frequency of the brain waves of the user to which the first and second sound signals are supplied;
the third and fourth switching frequencies, the signal intensities of the first and second sound signals, and the duty ratios of the first and second sound signals based on the frequency of the user's brain waves. controlling the third and fourth signal generation circuits to induce the frequency of the brain waves to the target frequency by changing at least one of the parameters of the first and second sound signals;
The brain wave control device further includes a storage device that stores parameters of the first and second sound signals when the frequency of the brain waves reaches the target frequency,
The control circuit sets parameters of the first and second sound signals when the frequency of the brain waves reaches the target frequency as initial values in the third and fourth signal generation circuits.
Brain wave control device. the storage device stores an order of parameters of the first and second sound signals that were effective for inducing the frequency of the brain waves;
the control circuit varies parameters of the first and second sound signals in an order that is effective for inducing the brain wave frequency;
The brain wave control device according to claim 6 . The control circuit includes:
controlling the first and third signal generation circuits so that the first sound signal is synchronized with the first optical signal;
controlling the second and fourth signal generation circuits so that the second sound signal is synchronized with the second optical signal;
An electroencephalogram control device according to one of claims 5 to 7 . a first signal generation circuit that generates a first optical signal using a first light source;
a second signal generation circuit that generates a second optical signal using a second light source;
a third signal generation circuit that generates a first sound signal using the first transducer;
a fourth signal generation circuit that generates a second sound signal using a second transducer;
An electroencephalogram control device comprising a control circuit that controls the first to fourth signal generation circuits,
The control circuit includes:
The first light source is configured to generate the first optical signal by intermittently lighting the first light source with alternating on periods and off periods at a first switching frequency that is equal to or higher than the critical fusion frequency. controls the signal generation circuit of
a second switching frequency that is equal to or higher than the critical fusion frequency and has a difference equal to a predetermined target frequency with respect to the first switching frequency; controlling the second signal generation circuit to generate the second optical signal by intermittently lighting the second light source,
The third signal generating circuit is configured to generate the first sound signal by intermittently generating a noise sound from the first transducer having an on period and an off period alternating at a third switching frequency. control,
the second transducer intermittently generates a noise sound having alternating on and off periods at a fourth switching frequency having a difference equal to the target frequency with respect to the third switching frequency; controlling the fourth signal generation circuit to generate a second sound signal;
The control circuit is configured such that the first sound signal is asynchronous to the first and second optical signals, and the second sound signal is asynchronous to the first and second optical signals. controlling the first to fourth signal generation circuits as follows;
Brain wave control device. The control circuit controls the first and second signal generation circuits so that the first and second optical signals each have a variable duty ratio.
An electroencephalogram control device according to one of claims 6 to 9. the control circuit controls the first and second signal generation circuits so that the first and second optical signals each have variable signal strength;
The electroencephalogram control device according to one of claims 6 to 10. The control circuit controls the third and fourth signal generation circuits so that the first and second sound signals each have a variable duty ratio.
The electroencephalogram control device according to one of claims 6 to 11 . The control circuit controls the third and fourth signal generation circuits so that the first and second sound signals each have variable signal strength.
An electroencephalogram control device according to one of claims 6 to 12 . the first light source configured to illuminate the right eye of the user with the first light signal;
the second light source configured to illuminate the user's left eye with the second light signal;
the first transducer configured to provide the first sound signal to the right ear of the user;
the second transducer configured to provide the second sound signal to the user's left ear;
and an electroencephalogram control device according to one of claims 5 to 13 .
Brain wave control system. the first and second light sources are integrated into eyeglasses;
The electroencephalogram control system according to claim 14 . a first light source configured to illuminate the right eye of the user with a first light signal;
a second light source configured to illuminate a left eye of the user with a second light signal;
a first transducer configured to provide a first sound signal to the user's right ear;
a second transducer configured to provide a second sound signal to the user's left ear;
An electroencephalogram control system comprising an electroencephalogram control device,
The brain wave control device includes:
a first signal generation circuit that generates the first optical signal using the first light source;
a second signal generation circuit that generates the second optical signal using the second light source;
a third signal generation circuit that generates the first sound signal using the first transducer;
a fourth signal generation circuit that generates the second sound signal using the second transducer;
and a control circuit that controls the first to fourth signal generation circuits,
The control circuit includes:
The first light source is configured to generate the first optical signal by intermittently lighting the first light source with alternating on periods and off periods at a first switching frequency that is equal to or higher than the critical fusion frequency. controls the signal generation circuit of
a second switching frequency that is equal to or higher than the critical fusion frequency and has a difference equal to a predetermined target frequency with respect to the first switching frequency; controlling the second signal generation circuit to generate the second optical signal by intermittently lighting the second light source,
The third signal generating circuit is configured to generate the first sound signal by intermittently generating a noise sound from the first transducer having an on period and an off period alternating at a third switching frequency. control,
the second transducer intermittently generates a noise sound having alternating on and off periods at a fourth switching frequency having a difference equal to the target frequency with respect to the third switching frequency; controlling the fourth signal generation circuit to generate a second sound signal;
the first and second light sources are incorporated into an eye mask;
The brain wave control system further includes a heater built into the eye mask,
The control circuit includes:
acquiring brain waves of a user to whom the first and second optical signals are irradiated and the first and second sound signals are supplied;
causing the heater to generate heat when the frequency of the brain waves reaches the target frequency;
Brain wave control system. The control circuit controls the first and second signal generation circuits so that the first and second optical signals each have a variable duty ratio.
The electroencephalogram control system according to claim 16. the control circuit controls the first and second signal generation circuits so that the first and second optical signals each have variable signal strength;
The electroencephalogram control system according to claim 16 or 17. The control circuit controls the third and fourth signal generation circuits so that the first and second sound signals each have a variable duty ratio.
The electroencephalogram control system according to one of claims 16 to 18. The control circuit controls the third and fourth signal generation circuits so that the first and second sound signals each have variable signal strength.
The electroencephalogram control system according to one of claims 16 to 19. The eye mask is configured to accommodate a container for aromatherapy essential oil.
The electroencephalogram control system according to one of claims 16 to 20 . The first and second light sources irradiate the first and second light signals to the user's right and left eyes, respectively, and also irradiate the first and second light signals to body parts other than the user's right and left eyes. configured to emit a second optical signal;
The electroencephalogram control system according to one of claims 14 to 21. the first and second transducers are incorporated into headphones or earphones;
The electroencephalogram control system according to one of claims 14 to 22.

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