Space presentation device, space presentation method, and space presentation program

Abstract

To provide a space presentation device having an information acquisition unit for acquiring brain wave information on an object person and a space presentation unit for presenting a performance space to the object person.SOLUTION: An information acquisition unit acquires first brain wave information before a performance space is presented. A space presentation unit presents a performance space according to the first brain wave information. The information acquisition unit acquires second brain wave information after the performance space is presented. The space presentation unit adjusts the performance space on the basis of a change from the first brain wave information to the second brain wave information. The space presentation device may further include a state estimation unit for estimating the state of an object person on the basis of the brain wave information on the object person. The space presentation unit may present the performance space on the basis of the state of the object person.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a space presentation device, a space presentation method, and a space presentation program.

Background Art

[0002] Patent Document 1 describes that "information on scents suitable for all of a plurality of users is provided based on the mental states of all of the plurality of users existing in a predetermined space." (Abstract) Patent Document 2 describes that "configured to monitor the state of an individual's brain, creating a feedback loop in which the state of the individual's brain modulates the parameters of an augmented reality system." (Abstract) [Prior Art Documents] [Patent Documents] [Patent Document 1] Japanese Patent Application Laid-Open No. 2021-108918 [Patent Document 2] Japanese Patent Application Publication No. 2021-511612

Summary of the Invention

[0003] In a first aspect of the present invention, a space presentation device is provided. The space presentation device includes an information acquisition unit that acquires electroencephalogram information of a subject, and a space presentation unit that presents a production space to the subject. The information acquisition unit acquires first electroencephalogram information before the production space is presented. The space presentation unit presents a production space according to the first electroencephalogram information. The information acquisition unit acquires second electroencephalogram information after the production space is presented. The space presentation unit adjusts the production space based on the change from the first electroencephalogram information to the second electroencephalogram information.

[0004] The space presentation device may further include a state estimation unit that estimates the state of the subject based on the electroencephalogram information of the subject. The space presentation unit may present the production space based on the state of the subject.

[0005] In any of the above space presentation devices, the information acquisition unit may further acquire biometric information of the subject. The state estimation unit may estimate the state of the subject based on the electroencephalogram information and the biometric information.

[0006] In any of the above-described spatial presentation devices, the state estimation unit may estimate the state based on the change from the ratio of the amplitude of the brain waves in a predetermined frequency band in the first electroencephalogram information to the total amplitude of the brain waves in the second electroencephalogram information, and the ratio of the magnitude of the first power spectrum to the magnitude of the second power spectrum in the heartbeat of the subject. The total amplitude is the sum of the amplitudes of alpha waves, beta waves, theta waves, gamma waves, and delta waves. The frequency band of the second power spectrum is a higher frequency band than the frequency band of the first power spectrum.

[0007] In any of the above-described spatial presentation devices, the state estimation unit may estimate the state based on the ratio of the magnitude of the first power spectrum to the magnitude of the second power spectrum after the presentation space is presented, the magnitude relationship between the ratio of the magnitude of the first power spectrum to the magnitude of the second power spectrum and a predetermined threshold value, and the change from the ratio of the amplitude of the brain waves in the first electroencephalogram information to the total amplitude of the brain waves in the second electroencephalogram information.

[0008] In any of the above-described spatial presentation devices, the state may include a plurality of states of the subject. The state estimation unit may estimate one of the plurality of states based on the change from the ratio of the amplitude of the brain waves in the first electroencephalogram information to the total amplitude of the brain waves in the second electroencephalogram information, and the ratio of the magnitude of the first power spectrum to the magnitude of the second power spectrum.

[0009] In any of the above-described spatial presentation devices, the brain waves in the predetermined frequency band may be at least one of delta waves, theta waves, low alpha waves, and medium alpha waves.

[0010] In any of the above-described spatial presentation devices, the brain waves in the predetermined frequency band may be at least one of high alpha waves, low beta waves, high beta waves, and gamma waves.

[0011] In any of the above-described space presentation devices, the information acquisition unit may generate a question to be presented to the subject based on the first brain wave information. The space presentation unit may present a production space based on the answer to the question.

[0012] In any of the above-described space presentation devices, the information acquisition unit may further acquire line-of-sight information indicating the position being visually recognized by the subject. The space presentation unit may adjust the production space based on the line-of-sight information.

[0013] In any of the above-described space presentation devices, the information acquisition unit may further acquire a first timing at which the space presentation unit presents a production space corresponding to the first brain wave information, and a second timing of a change from the first brain wave information to the second brain wave information. The space presentation unit may adjust the production space based on the relationship between the first timing and the second timing.

[0014] In any of the above-described space presentation devices, the space presentation unit may present a production space that changes over time according to the first brain wave information from the first timing to the second timing. The information acquisition unit may acquire the type of the production space based on the production space that changes over time. The space presentation unit may adjust the production space based on the type of the production space.

[0015] In any of the above-described space presentation devices, the information acquisition unit may acquire the second brain wave information at a timing based on the type of the production space.

[0016] In a second aspect of the present invention, a space presentation method is provided. The space presentation method includes a first information acquisition step in which an information acquisition unit acquires first brain wave information before a production space is presented, a space presentation step in which a space presentation unit presents a production space corresponding to the first brain wave information, a second information acquisition step in which the information acquisition unit acquires second brain wave information after the production space is presented, and a space adjustment step in which the space presentation unit adjusts the production space based on a change from the first brain wave information to the second brain wave information.

[0017] In a third aspect of the present invention, a spatial presentation program is provided. The spatial presentation program causes a computer to execute a first information acquisition step of acquiring first electroencephalogram information before a presentation space is presented, a spatial presentation step of presenting a presentation space according to the first electroencephalogram information, a second information acquisition step of acquiring second electroencephalogram information after the presentation space is presented, and a spatial adjustment step of adjusting the presentation space based on a change from the first electroencephalogram information to the second electroencephalogram information.

[0018] Note that the above summary of the invention does not list all the features of the present invention. Also, sub-combinations of these feature groups can also be inventions.

Brief Description of the Drawings

[0019]

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[0020] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential to the solution of the invention.

[0021] FIG. 1 is a diagram showing an example of a subject 110 before a presentation space 200 (described later) is presented. In the example of FIG. 1, the subject 110 is sitting at his / her desk in the office. Let the state of the subject 110 be state S. State S may be an explicit state of the subject 110 or a potential state. The explicit state of the subject 110 is the mental state of the subject 110 that the subject 110 is aware of himself / herself. The potential state of the subject 110 is the mental state of the subject 110 that the subject 110 is not aware of himself / herself. In the example of FIG. 1, before the presentation space 200 (described later) is presented, the subject 110 feels "tired, stressed, and unmotivated."

[0022] FIG. 2 is a diagram showing an example of the subject 110 after the presentation space 200 is presented. After the presentation space 200 is presented may refer to after the start of the presentation of the presentation space 200, during the presentation of the presentation space 200, or after the end of the presentation of the presentation space 200. In the example of FIG. 2, the subject 110 stands up from his / her seat in the example of FIG. 1 and moves to a separate room where the presentation space 200 is presented. In the example of FIG. 2, in the separate room, the presentation space 200 is presented to the subject 110.

[0023] The performance space 200 may be a virtual space or a space where the image element 210 is displayed in the real space. The image element 210 may be a virtual object. Displaying the image element 210 in the real space may refer to the image element 210 being displayed on the walls, ceiling, etc. of the real space, or may also refer to the image element 210 of a video being displayed on the walls, ceiling, etc. of the real space. In the example of FIG. 2, the image element 210 includes a grassland, clouds, and a rainbow. In the example of FIG. 2, the image element 210 is superimposed and displayed in the real space.

[0024] In the example of FIG. 2, the subject 110 is returning to his / her seat in the example of FIG. 1 from a separate room where the performance space 200 was presented. In the example of FIG. 2, after the performance space 200 is presented, the subject 110 feels "refreshed. I'll do my best."

[0025] FIG. 3 is a diagram showing another example of the subject 110 before the performance space 200 is presented. In the example of FIG. 3, the subject 110 is sitting on the floor at home. In the example of FIG. 3, before the performance space 200 is presented, the subject 110 feels "lonely. I can't get motivated."

[0026] FIG. 4 is a diagram showing an example of the subject 110 after the performance space 200 is presented. In the example of FIG. 4, the subject 110 stands up from the state of sitting on the floor in the example of FIG. 3 and moves to a separate room where the performance space 200 is presented. In the separate room, the performance space 200 is presented to the subject 110. In the example of FIG. 4, the image element 210 includes animals such as dogs and birds, a grassland, and clouds. In the example of FIG. 4, the image element 210 is displayed in the real space. In the example of FIG. 4, after the performance space 200 is presented, the subject 110 feels "energized. Maybe I should go on a trip."

[0027] FIG. 5 is a block diagram showing an example of the space presentation device 100 according to an embodiment of the present invention. The space presentation device 100 includes an information acquisition unit 10 and a space presentation unit 20. The space presentation device 100 may include a state estimation unit 30, a storage unit 40, and a control unit 90.

[0028] Part or all of the spatial presentation device 100 may be realized by a computer. The control unit 90 may be the CPU (Central Processing Unit) of the computer. When the spatial presentation device 100 is realized by a computer, a spatial presentation program for causing the computer to function as the spatial presentation device 100 may be installed in the computer, or a spatial presentation program for executing the spatial presentation method described later may be installed.

[0029] Let the brain wave information of the subject 110 be the brain wave information Ib. The information acquisition unit 10 acquires the brain wave information Ib of the subject 110. The brain wave information Ib may be information that reproduces at least a part of the time waveform of the brain waves of the subject 110. The brain wave information Ib may include data obtained by sampling the time waveform of the brain waves, may include data indicating the magnitude of the frequency components of the brain waves at one or a plurality of frequencies, and may include other data. For example, the brain wave information Ib includes data indicating the magnitude of at least one component of delta waves (less than 4 Hz), theta waves (4 Hz or more and less than 8 Hz), alpha waves (8 Hz or more and less than 14 Hz), beta waves (14 Hz or more and less than 26 Hz), and gamma waves (26 Hz or more and less than 40 Hz).

[0030] Alpha waves may be further classified into lower alpha waves (8 Hz or more and less than 10 Hz), middle alpha waves (10 Hz or more and less than 12 Hz), and higher alpha waves (12 Hz or more and less than 14 Hz) according to the frequency band. The brain wave information Ib may include data indicating the magnitude of at least one of the lower alpha waves, middle alpha waves, and higher alpha waves.

[0031] Beta waves may be further classified into lower beta waves (14 Hz or more and less than 18 Hz) and higher beta waves (18 Hz or more and less than 26 Hz) according to the frequency band. The brain wave information Ib may include data indicating the magnitude of at least one of the lower beta waves and higher beta waves.

[0032] The brain wave information Ib may include information on the time waveforms of one or more brain waves measured at one or more positions in the head of the subject 110, including the head and face. For example, the brain wave information Ib may be obtained by measuring the time waveforms of the potentials of electrodes arranged at equal intervals near the scalp of the subject 110, such as the international 10-20 method, or may be obtained by other methods. The plurality of electrodes arranged on the scalp may not be at equal intervals. The electrodes may be provided in wearable devices worn on the head of the subject 110, such as a headgear, headphones, earphones, glasses, etc. The brain wave information Ib may be information obtained by wireless communication of electrical signals at electrodes implanted in the body of the subject 110.

[0033] The sum of the amplitudes of alpha waves, beta waves, theta waves, gamma waves, and delta waves at a certain timing is defined as the overall amplitude As. As an example, if the ratio of the amplitude of the delta waves of the subject 110 to the overall amplitude As is greater than any of the ratios of the amplitudes of the alpha waves, beta waves, theta waves, and gamma waves to the overall amplitude As, it can be inferred that the subject 110 is in a sleep state.

[0034] As an example, if the ratio of the amplitude of the theta waves of the subject 110 to the overall amplitude As increases with the passage of time, it can be inferred that the fatigue and sleepiness of the subject 110 are increasing. As an example, if the ratio of the sum of the amplitudes of the low alpha waves and the medium alpha waves of the subject 110 to the overall amplitude As increases with the passage of time, it can be inferred that the relaxation level of the subject 110 is increasing. As an example, if the ratio of the sum of the amplitudes of the high alpha waves and the low beta waves of the subject 110 to the overall amplitude As increases with the passage of time, it can be inferred that the state of a good balance between relaxation and concentration of the subject 110 is increasing. The state of a good balance between relaxation and concentration is the so-called state of being fully absorbed.

[0035] The electroencephalogram information Ib before the presentation of the performance space 200 is defined as the first electroencephalogram information Ib1. The information acquisition unit 10 acquires the first electroencephalogram information Ib1. The space presentation unit 20 presents the performance space 200 to the subject 110. The space presentation unit 20 presents the performance space 200 according to the first electroencephalogram information Ib1. The performance space 200 may include image elements 210. The performance space 200 according to the first electroencephalogram information Ib1 is a space that can change the state S (described later) of the subject 110 to the desired state S (described later) of the subject 110.

[0036] When the ratio of the amplitude of the theta wave in the first electroencephalogram information Ib1 to the overall amplitude As increases with the passage of time, the performance space 200 according to the first electroencephalogram information Ib1 may refer to the performance space 200 for alleviating the fatigue and drowsiness of the subject 110. When the ratio of the sum of the amplitudes of the low alpha wave and the middle alpha wave in the first electroencephalogram information Ib1 to the overall amplitude As increases with the passage of time, the performance space 200 according to the first electroencephalogram information Ib1 may refer to the performance space 200 for promoting the relaxation level of the subject 110. When the ratio of the sum of the amplitudes of the high alpha wave and the low beta wave in the first electroencephalogram information Ib1 to the overall amplitude As increases with the passage of time, the performance space 200 according to the first electroencephalogram information Ib1 may refer to the performance space 200 for promoting the concentration level of the subject 110.

[0037] After the performance space 200 is presented, the electroencephalogram information Ib is defined as the second electroencephalogram information Ib2. The information acquisition unit 10 acquires the second electroencephalogram information Ib2. The space presentation unit 20 adjusts the performance space 200 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2. For example, even though the performance space 200 corresponding to the first electroencephalogram information Ib1 is a performance space 200 for relieving the fatigue and drowsiness of the subject 110, if the ratio of the amplitude of the theta wave in the second electroencephalogram information Ib2 to the overall amplitude As is increased compared to the ratio of the amplitude of the theta wave in the first electroencephalogram information Ib1 to the overall amplitude As, it is highly probable that the fatigue and drowsiness of the subject 110 have not been relieved by the presented performance space 200. In such a case, the space presentation unit 20 adjusts the performance space 200. Adjusting the performance space 200 may refer to adjusting the brightness of the performance space 200, or may refer to changing the type K (described later) of the performance space 200. Changing the type K (described later) of the performance space 200 may refer to, for example, presenting animals such as dogs and cats instead of the scenery when a scenery such as the sea or mountains is presented in the performance space 200 corresponding to the first electroencephalogram information Ib1. Adjusting the performance space 200 may also refer to presenting music in the performance space 200.

[0038] The type K of the performance space 200 refers to the type of the performance space 200 that can bring the subject 110 to the desired state S. The type K and the state S may be associated with each other in advance. For example, the state S in which the subject 110 is healed may be associated with the type K when the type K is a scenery such as the sea or mountains, the state S in which the subject 110 is healed may be associated with the type K when the type K is animals such as dogs and cats, and the state S in which the subject 110 is active and engaged may be associated with the type K when the type K is a jungle in an adventure in the virgin land. The associated type K and state S may be stored in the storage unit 40.

[0039] For example, the presentation space 200 corresponding to the first electroencephalogram information Ib1 is a presentation space 200 for promoting the relaxation degree of the subject 110. When the ratio of the overall amplitude As of the sum of the amplitudes of the low alpha wave and the middle alpha wave of the second electroencephalogram information Ib2 to the overall amplitude As is increased compared to the ratio of the overall amplitude As of the sum of the amplitudes of the low alpha wave and the middle alpha wave of the first electroencephalogram information Ib1, the probability that the relaxation degree of the subject 110 is promoted by the presented presentation space 200 is high. In such a case, the space presentation unit 20 may adjust the presentation space 200 so as to further promote the relaxation degree. In this example, adjusting the presentation space 200 means adding an effect to the presentation space 200 without changing the type K of the presentation space 200. Adding an effect may refer to, for example, adding image elements 210 such as dogs and cats to the presentation space 200.

[0040] For example, the presentation space 200 corresponding to the first electroencephalogram information Ib1 is a presentation space 200 for promoting the degree of concentration of the subject 110. When the ratio of the overall amplitude As of the sum of the amplitudes of the high alpha wave and the low beta wave of the second electroencephalogram information Ib2 to the overall amplitude As is increased compared to the ratio of the overall amplitude As of the sum of the amplitudes of the high alpha wave and the low beta wave of the first electroencephalogram information Ib1, the probability that the degree of concentration of the subject 110 is promoted by the presented presentation space 200 is high. In such a case, the space presentation unit 20 may adjust the presentation space 200 so as to promote the degree of concentration. In this example, adjusting the presentation space 200 means adding an effect to the presentation space 200 without changing the type K of the presentation space 200. Adding an effect may refer to, for example, presenting music for further promoting the degree of concentration.

[0041] The electroencephalogram information Ib may reflect the explicit state S or the potential state S of the subject 110. The potential state S may reflect the psychological state of the subject 110 that the subject 110 is not aware of by himself / herself. The space presentation unit 20 adjusts the presentation space 200 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2. Therefore, the subject 110 is likely to be in the desired state S.

[0042] The state estimation unit 30 may estimate the state of the subject 110 based on the brain wave information Ib of the subject 110. Let the state be the state S. The state estimation unit 30 may estimate the state S of the subject 110 based on the change from the first brain wave information Ib1 to the second brain wave information Ib2. The space presentation unit 20 may present the production space 200 based on the state S of the subject 110 and may adjust the production space 200.

[0043] As an example, when the ratio of the amplitude of the theta wave of the second brain wave information Ib2 to the overall amplitude As is larger than the ratio of the amplitude of the theta wave of the first brain wave information Ib1 to the overall amplitude As, the state estimation unit 30 may estimate the state S of the subject 110 as a state in which fatigue and drowsiness are increasing. The space presentation unit 20 may present a production space 200 that relaxes the state S in which fatigue and drowsiness are increasing.

[0044] As an example, when the ratio of the sum of the amplitudes of the low alpha wave and the middle alpha wave of the second brain wave information Ib2 to the overall amplitude As is larger than the ratio of the sum of the amplitudes of the low alpha wave and the middle alpha wave of the first brain wave information Ib1 to the overall amplitude As, the state estimation unit 30 may estimate the state S of the subject 110 as a state in which the degree of relaxation is increasing. The space presentation unit 20 may present a production space 200 that promotes the state S in which the degree of relaxation is increasing.

[0045] As an example, when the ratio of the sum of the amplitudes of the high alpha wave and the low beta wave of the second brain wave information Ib2 to the overall amplitude As is larger than the ratio of the sum of the amplitudes of the high alpha wave and the low beta wave of the first brain wave information Ib1 to the overall amplitude As, the state estimation unit 30 may estimate the state S of the subject 110 as a state in which the balance between relaxation and concentration is good. The state in which the balance between relaxation and concentration is good is a so-called state of immersion. The space presentation unit 20 may present a production space 200 that promotes the state S in which the degree of immersion is increasing.

[0046] FIG. 6 is a diagram showing an example of the information acquisition unit 10. The information acquisition unit 10 may have an electroencephalograph capable of measuring the electroencephalogram information Ib, or may have a communication device that acquires the electroencephalogram information Ib measured by an external electroencephalograph. The information acquisition unit 10 in this example is a headgear type electroencephalograph. The information acquisition unit 10 may be an earphone type electroencephalograph. In this example, the subject 110 may be presented with the production space 200 while wearing a headgear type or earphone type electroencephalograph.

[0047] When the information acquisition unit 10 is a headgear type electroencephalograph, the space presentation unit 20 and the control unit 90 do not have to be housed in the housing of the headgear. The electroencephalogram information Ib acquired by the information acquisition unit 10 may be wirelessly transmitted to the control unit 90.

[0048] The information acquisition unit 10 may further acquire the biological information of the subject 110. Let the biological information be biological information Ig. The information acquisition unit 10 may acquire the biological information Ig before the production space 200 is presented, and may acquire the biological information Ig after the production space 200 is presented. The biological information Ig may include at least one of the heartbeat information, sweating amount information, and body temperature information of the subject 110. The biological information Ig of the subject 110 may be acquired by a sensor provided in a wearable device worn by the subject 110.

[0049] In the biological information Ig after the production space 200 is presented, the potential evaluation of the subject 110 in contact with the production space 200 with respect to the production space 200 can be reflected. For example, when the subject 110 feels stress with respect to the production space 200, the subject 110 is likely to be in a state where the sympathetic nerve is more dominant than the parasympathetic nerve. When the sympathetic nerve is more dominant than the parasympathetic nerve, the heartbeat variation of the subject 110 is likely to become smaller, and the stress state is likely to become larger.

[0050] The state estimation unit 30 may estimate the state S based on the electroencephalogram information Ib and the biological information Ig. The state estimation unit 30 may estimate the state S of the subject 110 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2 and the biological information Ig.

[0051] Let the magnitude of the first power spectrum in the heartbeat of subject 110 be LF, and the magnitude of the second power spectrum be HF. The frequency band of the second power spectrum is a higher-frequency band than the frequency band of the first power spectrum. The frequency band of the first power spectrum and the frequency band of the second power spectrum do not have to overlap. The frequency band of the first power spectrum is, for example, 0.04 - 0.15 Hz. The frequency band of the second power spectrum is, for example, 0.15 - 0.4 Hz.

[0052] Let the change from the ratio of the amplitude of brain waves in a predetermined frequency band in the first brain wave information Ib to the total amplitude As of the brain wave amplitude in the same predetermined frequency band in the second brain wave information Ib2 be change C. The state estimation unit 30 may estimate the state S based on the change C and the ratio of LF to HF (LF / HF).

[0053] As an example, when the ratio of the sum of the amplitudes of the high beta waves and gamma waves of subject 110 after the presentation of the production space 200 to the total amplitude As is greater than the ratio to the total amplitude As before the presentation of the production space 200, and the ratio of LF to HF (LF / HF) after the presentation of the production space 200 is equal to or greater than the threshold value, it can be inferred that the irritable state, hypersensitive state, or stress state of subject 110 is increasing. When the ratio of LF to HF (LF / HF) is equal to or greater than the threshold value, subject 110 may be judged to be in a state where the sympathetic nerve is dominant over the parasympathetic nerve. When the ratio of LF to HF (LF / HF) is less than the threshold value, subject 110 may be judged to be in a state where the parasympathetic nerve is dominant over the sympathetic nerve. The threshold value may be 2, may be 3, may be 4, or may be 5.

[0054] As an example, when the ratio of the sum of the amplitudes of the high beta waves and the gamma waves of the subject 110 after the presentation space 200 is presented to the overall amplitude As is greater than the ratio to the overall amplitude As before the presentation space 200 is presented, and the ratio of LF to HF (LF / HF) after the presentation space 200 is presented is less than the threshold value, it can be inferred that the excited state of the subject 110 is increasing.

[0055] The state estimation unit 30 may estimate the state S based on the magnitude relationship between the ratio of LF to HF (LF / HF) after the presentation space 200 is presented and the threshold value of the ratio of LF to HF, and the change C. The threshold value may be determined in advance. When the ratio of the sum of the amplitudes of the high beta waves and the gamma waves of the subject 110 after the presentation space 200 is presented to the overall amplitude As is greater than the ratio to the overall amplitude As before the presentation space 200 is presented, and the ratio of LF to HF (LF / HF) after the presentation space 200 is presented is greater than or equal to the threshold value, the state estimation unit 30 may estimate the state S that the sense of vigilance of the subject 110 with respect to the presentation space 200 is increasing. When the ratio of the sum of the amplitudes of the high beta waves and the gamma waves of the subject 110 after the presentation space 200 is presented to the overall amplitude As is greater than the ratio to the overall amplitude As before the presentation space 200 is presented, and the ratio of LF to HF (LF / HF) after the presentation space 200 is provided is less than the threshold value, the state estimation unit 30 may estimate the state S that the degree of excitement with respect to the presentation space 200 is increasing.

[0056] FIG. 7 is a diagram showing an example of the state S estimated by the state estimation unit 30. The state S may include a plurality of states (the first state S1 to the nth state Sn) of the subject 110. In this example, the state S includes four states (the first state S1 to the fourth state S4) of the subject 110. In FIG. 7, the brain wave of the low frequency f1 refers to at least one of a delta wave, a theta wave, a low alpha wave, and a middle alpha wave, and the brain wave of the high frequency f2 refers to at least one of a high alpha wave, a low beta wave, a high beta wave, and a gamma wave.

[0057] The amplitude of the brain wave of the subject 110 in a predetermined frequency band is defined as the amplitude Af. The amplitude Af of the brain wave of the subject 110 before the presentation of the presentation space 200 is defined as the amplitude Af1. The amplitude Af of the brain wave of the subject 110 after the presentation of the presentation space 200 is defined as the amplitude Af2. The brain wave in the predetermined frequency band may be at least one of a low alpha wave, a medium alpha wave, a high alpha wave, a low beta wave, a high beta wave, a gamma wave, and a theta wave.

[0058] The state estimation unit 30 may estimate the state S based on the change from the ratio of the amplitude Af1 in the overall amplitude As to the ratio of the amplitude Af2 in the overall amplitude As and the ratio of LF to HF (LF / HF). The state S may be one of a plurality of states S of the subject 110 (any one of the first state S1 to the nth state Sn).

[0059] In this example, the first state S1 is a state of the subject 110 when, in the brain wave of the low frequency f1, the ratio of the amplitude Af2 in the overall amplitude As is larger than the ratio of the amplitude Af1 in the overall amplitude As, and the ratio of LF to HF (LF / HF) after the presentation of the presentation space 200 is equal to or higher than the threshold value. When the subject 110 is in the first state S1, it can be inferred that the fatigue state and drowsiness state of the subject 110 are increasing. When the subject 110 is in the first state S1, the state estimation unit 30 may estimate that the degree of interest of the subject 110 in the presentation space 200 is decreasing.

[0060] In this example, the second state S2 is a state of the subject 110 when, in the brain wave of the low frequency f1, the ratio of the amplitude Af2 in the overall amplitude As is larger than the ratio of the amplitude Af1 in the overall amplitude As, and the ratio of LF to HF (LF / HF) after the presentation of the presentation space 200 is less than the threshold value. When the subject 110 is in the second state S2, it can be inferred that the relaxation state of the subject 110 is increasing. When the subject 110 is in the second state S2, the state estimation unit 30 may estimate that the degree of comfort of the subject 110 with respect to the presentation space 200 is increasing.

[0061] In this example, the third state S3 is a state of the subject 110 when, in the brain wave of the high frequency f2, the ratio of the amplitude Af2 to the overall amplitude As is larger than the ratio of the brain wave Af1 to the overall amplitude As, and the ratio of LF to HF (LF / HF) after the presentation space is presented is equal to or higher than the threshold value. When the subject 110 is in the third state S3, it can be presumed that the irritation state, the hypersensitive state, or the stress state of the subject 110 is increasing. When the subject 110 is in the third state S3, the state estimation unit 30 may presume that the alertness of the subject 110 with respect to the presentation space 200 is increasing.

[0062] In this example, the fourth state S4 is a state of the subject 110 when, in the brain wave of the high frequency f2, the ratio of the amplitude Af2 to the overall amplitude As is larger than the ratio of the brain wave Af1 to the overall amplitude As, and the ratio of LF to HF (LF / HF) after the presentation space 200 is presented is less than the threshold value. When the subject 110 is in the fourth state S4, it can be presumed that the state of concentration of the subject 110 is increasing. When the subject 110 is in the fourth state S4, the state estimation unit 30 may presume that the degree of interest of the subject 110 with respect to the presentation space 200 is increasing.

[0063] FIG. 8 is a diagram showing an example of the gaze information of the subject 110. In FIG. 8, the presentation space 200 and the subject 110 in FIG. 4 are shown together with the gaze information. Let the gaze information be gaze information Ie. The gaze information Ie is information indicating the position that the subject 110 is visually recognizing in the presentation space 200. The gaze information Ie may be obtained from an image of the eyes of the subject 110. The image of the eyes may be obtained by an image pickup device provided in the wearable device worn by the subject 110, or may be obtained by an image pickup device provided in another device.

[0064] The information acquisition unit 10 may acquire the line-of-sight information Ie. Based on the line-of-sight information Ie, the information acquisition unit 10 may acquire the type of the image element 210 that the subject 110 is focusing on. Let the type of the image element 210 be the type K'. The information acquisition unit 10 may acquire the type K' of the image element 210 based on the line-of-sight information Ie indicating the position that the subject 110 is visually recognizing and the image element 210 presented by the spatial presentation unit 20 at that position. The type K' may refer to the type of scenery such as the sea, mountains, sky, etc., or may also refer to the type of living body such as animals, plants, etc. In the example of FIG. 8, the image element 210-1 is scenery, and the image element 210-2 is a living body. The line-of-sight information Ie1 shown in FIG. 8 is the line-of-sight information Ie when the subject 110 is visually recognizing the dog which is the image element 210-2, the line-of-sight information Ie2 is the line-of-sight information Ie when the subject 110 is visually recognizing the flower which is the image element 210-2, and the line-of-sight information Ie3 is the line-of-sight information Ie when the subject 110 is visually recognizing the scenery which is the image element 210-1.

[0065] The spatial presentation unit 20 may adjust the presentation space 200 based on the line-of-sight information Ie. The spatial presentation unit 20 may adjust the presentation space 200 based on the type K' of the image element 210 acquired by the information acquisition unit 10. In the example of FIG. 8, there may be a case where the dog presented in the presentation space 200 is an image element 210 that can make the state S of the subject 110 into the desired state S. In such a case, the spatial presentation unit 20 may adjust the presentation space 200 to display another dog in the presentation space 200. Thereby, it becomes easier for the subject 110 to reach the desired state S.

[0066] The space presentation unit 20 may adjust the presentation space 200 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2 and the gaze information Ie. The space presentation unit 20 may adjust the presentation space 200 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2 and the type K' of the image element 210 based on the gaze information Ie. The space presentation unit 20 may adjust the presentation space 200 so as to present an image element 210 of a type K' different from the image element 210 based on the gaze information Ie in the presentation space 200, or may adjust the presentation space 200 so as to present an image element 210 of the same type K' as the image element 210 based on the gaze information Ie in the presentation space 200.

[0067] For example, when the image element 210-2 based on the gaze information Ie1 is a dog and the ratio of the amplitude of the theta wave of the second electroencephalogram information Ib2 to the overall amplitude As is increased compared to the ratio of the amplitude of the theta wave of the first electroencephalogram information Ib1 to the overall amplitude As, the probability that the subject 110 is not relieved of fatigue and drowsiness by the image element 210-2 (a dog in this example) is high. In such a case, the space presentation unit 20 may present the image element 210-1 (e.g., empty space) in the presentation space 200 instead of the image element 210-2 (a dog in this example).

[0068] For example, when the image element 210 based on the gaze information Ie1 is a dog and the ratio of the sum of the amplitudes of the low alpha wave and the middle alpha wave of the second electroencephalogram information Ib2 to the overall amplitude As is increased compared to the ratio of the sum of the amplitudes of the low alpha wave and the middle alpha wave of the first electroencephalogram information Ib1 to the overall amplitude As, the probability that the relaxation level of the subject 110 is promoted by the image element 210-2 (a dog in this example) is high. In such a case, in addition to one image element 210-2 (a dog in this example), the space presentation unit 20 may present another image element 210-2 (e.g., another dog) in the presentation space 200.

[0069] For example, if the image element 210 based on the line-of-sight information Ie2 is a flower, and the ratio of the total amplitude As of the sum of the high alpha wave amplitude and the low beta wave amplitude of the second electroencephalogram information Ib2 to the total amplitude As is increased compared to the ratio of the total amplitude As of the sum of the high alpha wave amplitude and the low beta wave amplitude of the first electroencephalogram information Ib1, the subject 110 is highly likely to have increased concentration due to the image element 210-2 (a flower in this example). In such a case, in addition to one image element 210-2 (a flower in this example), the spatial presentation unit 20 may present other image elements 210-2 (for example, other flowers) in the production space 200.

[0070] Let the period during which the production space 200 is presented to the subject 110 be the period Te. The period Te may be the time from the time when the presentation of the production space 200 to the subject 110 is started to the time when the presentation of the production space 200 is ended. In the examples of FIGS. 1 and 8, it may be the time from the time when the subject 110 enters the separate room where the production space 200 is presented to the time when the subject 110 leaves the separate room.

[0071] The information acquisition unit 10 may acquire the time during which one image element 210 is visually recognized based on the line-of-sight information Ie. Let the time be the time Ts. The time Ts may refer to the time during which the subject 110 continuously visually recognizes the one image element 210. When the subject 110 visually recognizes one image element 210 during the period T, then visually recognizes another image element 210, and then visually recognizes the one image element 210 again, the time Ts may be the sum of the times during which the subject 110 continuously visually recognizes the one image element 210.

[0072] The spatial presentation unit 20 may adjust the production space 200 based on the ratio of the time Ts to the period Te. The spatial presentation unit 20 may adjust the production space 200 based on the magnitude relationship between the ratio of the time Ts to the period Te and the threshold value of the ratio of the time Ts to the period Te. Let the threshold value be the threshold value Tth1.

[0073] When the ratio of the time Ts occupied in the period Te is greater than the threshold value Tth1, the spatial presentation unit 20 may present image elements 210 of the same type K' as one image element 210 in the rendering space 200. When the ratio of the time Ts occupied in the period Te is greater than the threshold value Tth1, the probability that the one image element 210 can change the state S of the subject 110 to the desired state S is high. Therefore, the spatial presentation unit 20 may present image elements 210 of the same type K' as one image element 210 in the rendering space 200. When the ratio of the time Ts occupied in the period Te is less than or equal to the threshold value Tth1, the spatial presentation unit 20 may present image elements 210 of a type K' different from the one image element 210 in the rendering space 200. When the ratio of the time Ts occupied in the period Te is less than or equal to the threshold value Tth1, the probability that the one image element 210 is not an image element 210 that can change the state S of the subject 110 to the desired state S is high. Therefore, the spatial presentation unit 20 may present image elements 210 of a type K' different from the one image element 210 in the rendering space 200.

[0074] The information acquisition unit 10 may generate a question to be presented to the subject 110 based on the first electroencephalogram information Ib1. The information acquisition unit 10 may determine the type of the question to be presented to the subject 110 based on the first electroencephalogram information Ib1, and may generate a question of the determined type. For example, when the ratio of the total amplitude As of the sum of the amplitude of the low alpha wave and the amplitude of the medium alpha wave in the first electroencephalogram information Ib1 increases with the passage of time, the information acquisition unit 10 may generate a question for promoting the relaxation degree of the subject 110. A question for promoting the relaxation degree is, for example, a question such as asking about the favorite activity of the subject 110 (for example, mountain climbing, beach bathing, etc.).

[0075] For example, when the ratio of the total amplitude As of the sum of the amplitude of the high alpha wave and the amplitude of the low beta wave in the first electroencephalogram information Ib1 increases with the passage of time, the information acquisition unit 10 may generate a question for promoting the degree of concentration of the subject 110. A question for promoting the degree of concentration is, for example, a question such as asking about the favorite animal, favorite place, etc. of the subject.

[0076] The space presentation unit 20 may present the question generated by the information acquisition unit 10 in the production space 200. The space presentation unit 20 may present the production space 200 based on the response of the subject 110 to the question. Thereby, the subject 110 is more likely to reach the desired state S.

[0077] Based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2, the information acquisition unit 10 may further generate other questions to be presented to the subject 110. Based on the response to the question generated by the information acquisition unit 10, even though the space presentation unit 20 adjusts the production space 200, the state S of the subject 110 may not reach the desired state S. In such a case, the information acquisition unit 10 may further generate other questions to be presented to the subject 110. The space presentation unit 20 may adjust the production space 200 based on the response of the subject 110 to the other question. The information acquisition unit 10 may repeat the generation of questions until the state S of the subject 110 reaches the desired state S.

[0078] FIG. 9 is a diagram showing an example of the relationship between the presentation time t of the production space 200 and the electroencephalogram state of the subject 110. In FIG. 9, the presentation time of the production space 200 is represented by the time t. Let the electroencephalogram state of the subject 110 be the state Sb. The state Sb may refer to the ratio of the overall amplitude As of the amplitudes in a predetermined frequency band at a certain timing t, or may refer to the ratio of the amplitude of one frequency band (for example, alpha wave) to the amplitude of another frequency band (for example, beta wave) at a certain timing t.

[0079] In the example of FIG. 9, the brain wave of the subject 110 is in the state Sb1 at the first timing t1 and in the state Sb2 at the second timing t2. The second timing t2 is the timing of the change from the first brain wave information Ib1 to the second brain wave information Ib2. The timing of the change from the first brain wave information Ib1 to the second brain wave information Ib2 may be the timing when the change to the second brain wave information Ib2 is completed when the brain wave information Ib changes from the first brain wave information Ib1 to the desired second brain wave information Ib2. In the example of FIG. 9, there are a plurality of second timings t2. The second timing t2-1 is before the second timing t2-2. In the example of FIG. 9, it is assumed that at the first timing t1, the space presentation unit 20 presents the production space 200 corresponding to the first brain wave information Ib1.

[0080] Let the time from the first timing t1 to the second timing t2 be the time Tp. Let the time from the first timing t1 to the second timing t2-1 be the time Tp1, and the time from the first timing t1 to the second timing t2-2 be the time Tp2. In this example, the time Tp1 is shorter than the time Tp2.

[0081] The information acquisition unit 10 may acquire the first timing t1 and the second timing t2. The space presentation unit 20 may adjust the production space 200 based on the relationship between the first timing t1 and the second timing t2.

[0082] The production space 200 corresponding to the first brain wave information Ib1 may change over time. The space presentation unit 20 may present the production space 200 that changes over time from the first timing t1 to the second timing t2. The production space 200 that changes over time may refer to the production space 200 in which the position of the image element 210 changes with time t. The information acquisition unit 10 may acquire the type K of the production space 200 or the type K' of the image element 210 based on the production space 200 that changes over time. The information acquisition unit 10 may acquire the type K of the production space 200 or the type K' of the image element 210 based on the moving speed of the image element 210 in the production space 200. Let the threshold value of the moving speed be the threshold value Vth.

[0083] The information acquisition unit 10 may acquire the type K of the production space 200 or the type K' of the image element 210 based on the magnitude relationship between the moving speed of the image element 210 and the threshold value Vth. When the moving speed of the image element 210 is equal to or lower than the threshold value Vth, the information acquisition unit 10 may acquire that the type K of the production space 200 is a certain type K1, or may acquire that the type K' of the image element 210 is a certain type K1'. When the moving speed of the image element 210 is greater than the threshold value Vth, the information acquisition unit 10 may acquire that the type K of the production space 200 is another type K2 different from the certain type K1, or may acquire that the type K' of the image element 210 is another type K2' different from the certain type K1'.

[0084] The case where the moving speed of the image element 210 is equal to or lower than the threshold value Vth may refer to, for example, the case where the relative position between the subject 110 and the image element 210 changes gently with time t, such as when the subject 110 is looking at the scenery of the sea, mountains, etc. from inside a moving train. The case where the moving speed of the image element 210 is greater than the threshold value Vth may refer to, for example, the case where the relative position between the subject 110 and the image element 210 changes steeply with time t, such as when a dog, a cat, etc. suddenly jumps out from the grass in the production space 200 when the image element 210 is a living body such as a dog or a cat. The case where the moving speed of the image element 210 is greater than the threshold value Vth may also refer to, for example, the case where the relative position between the subject 110 and the image element 210 changes steeply with time t, such as when a beast suddenly jumps out from behind a rock in the production space 200 when the subject 110 is experiencing an activity such as exploring an undeveloped land and the production space 200 is an undeveloped land.

[0085] The space presentation unit 20 may adjust the presentation space 200 based on the type K of the presentation space 200 or the type K' of the image element 210. When the type K of the presentation space 200 is the one type K1 described above, for example, when the subject 110 continues to view the scenery from inside a moving train, the state S of the subject 110 may gradually change and then reach a desired state S. Therefore, the second electroencephalogram information Ib2 after the passage of the time Tp (in this example, the time Tp2) may be the electroencephalogram information Ib when the subject 110 is in the desired state S. For this reason, the space presentation unit 20 may present the presentation space 200 of the one type K1 even after the passage of the time Tp. The same applies when the type K' of the image element 210 is the one type K1' described above.

[0086] When the type K of the presentation space 200 is the other type K2 described above, for example, when the state S of the subject 110 changes abruptly, such as when the subject 110 witnesses a dog, a cat, etc. suddenly jumping out from the grass in the presentation space 200, the state S of the subject 110 may change abruptly. Therefore, the second electroencephalogram information Ib2 after the passage of the time Tp (in this example, the time Tp1) may be different from the electroencephalogram information Ib when the subject 110 is in the desired state S. For this reason, after the passage of the time Tp, the space presentation unit 20 does not have to present the presentation space 200 of the other type K2, and may present a presentation space 200 of a type K different from the other type K2. The same applies when the type K' of the image element 210 is the other type K2' described above.

[0087] The information acquisition unit 10 may acquire the second electroencephalogram information Ib2 at a timing based on the type K of the presentation space 200 or the type K' of the image element 210. The information acquisition unit 10 may change the second timing t2 for acquiring the second electroencephalogram information Ib2 for each type K of the presentation space 200. The information acquisition unit 10 may change the second timing t2 for acquiring the second electroencephalogram information Ib2 for each type K' of the image element 210. By the information acquisition unit 10 acquiring the second electroencephalogram information Ib2 at a timing based on the type K of the presentation space 200 or the type K' of the image element 210, it becomes easier for the information acquisition unit 10 to acquire the second electroencephalogram information Ib2 after the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2 has ended.

[0088] For example, when the type K of the presentation space 200 is the above-described one type K1, the second electroencephalogram information Ib2 can change gently as the image element 210 moves. For example, when the type K of the presentation space 200 is the above-described other type K2, the second electroencephalogram information Ib2 can change more steeply as the image element 210 moves than in the case of the one type K1. Therefore, the second timing t2 in the case where the type K of the presentation space 200 is the above-described one type K1 is more likely to be later than the second timing t2 in the case of the other type K2. In this example, the information acquisition unit 10 sets the second timing t2 for acquiring the second electroencephalogram information Ib2 in the case where the type K of the presentation space 200 is the above-described one type K1 to a timing later than the second timing t2 for acquiring the second electroencephalogram information Ib2 in the case of the other type K2. Thereby, the information acquisition unit 10 can easily acquire the second electroencephalogram information Ib2 after the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2 is completed.

[0089] FIG. 10 is a flowchart showing an example of a space presentation method according to an embodiment of the present invention. The space presentation method includes a first information acquisition step S100, a space presentation step S102, a second information acquisition step S104, and a space adjustment step S108. The space presentation method may include a state estimation step S106, a first question generation step S101, a second question generation step S105, a first timing acquisition step S103, and a second timing acquisition step S107. The space presentation method according to an embodiment of the present invention will be described by taking the space presentation device 100 shown in FIG. 5 as an example.

[0090] The first information acquisition step S100 is a step in which the information acquisition unit 10 acquires first electroencephalogram information Ib1 before the presentation space 200 is presented. The space presentation step S102 is a step in which the space presentation unit 20 presents the presentation space 200 according to the first electroencephalogram information Ib1. The second information acquisition step S104 is a step in which the information acquisition unit 10 acquires second electroencephalogram information Ib2 after the presentation space 200 is presented. The space adjustment step S108 is a step in which the space presentation unit 20 adjusts the presentation space 200 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2.

[0091] The state estimation step S106 is a step in which the state estimation unit 30 estimates the state S of the subject 110 based on the electroencephalogram information Ib of the subject 110. The state estimation step S106 may be a step in which the state estimation unit 30 estimates the state S of the subject 110 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2. The space adjustment step S108 may be a step in which the space presentation unit 20 adjusts the presentation space 200 based on the state S of the subject 110.

[0092] The first information acquisition step S100 or the second information acquisition step S104 may be a step in which the information acquisition unit 10 further acquires the biological information Ig of the subject 110. The state estimation step S106 may be a step in which the state estimation unit 30 estimates the state S of the subject 110 based on the electroencephalogram information Ib and the biological information Ig of the subject 110. The state estimation step S106 may be a step in which the state estimation unit 30 estimates the state S of the subject 110 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2 and the biological information Ig.

[0093] The state estimation step S106 may be a step in which the state estimation unit 30 estimates the state S based on the change from the ratio of the amplitude of the brain waves in the predetermined frequency band Af in the first electroencephalogram information Ib1 to the total amplitude As of the brain waves to the ratio of the amplitude of the brain waves in the predetermined frequency band Af in the second electroencephalogram information Ib2 to the total amplitude As of the brain waves, and the ratio (LF / HF) of the first power spectrum LF to the second power spectrum HF in the heartbeat of the subject 110.

[0094] The state estimation step S106 may be a step in which the state estimation unit 30 estimates the state S based on the magnitude relationship between the ratio (LF / HF) of LF to HF after the presentation space 200 is presented and a predetermined threshold value of the ratio (LF / HF) of LF to HF, and the change from the ratio of the amplitude of the brain waves in the first electroencephalogram information Ib1 to the total amplitude As of the brain waves to the ratio of the amplitude of the brain waves in the second electroencephalogram information Ib2 to the total amplitude As of the brain waves.

[0095] The state S may include a plurality of states of the subject 110. The state estimation step S106 may be a step in which the state estimation unit 30 estimates one state S among the plurality of states S based on the change from the ratio of the amplitude of the brain waves in the predetermined frequency band Af in the first electroencephalogram information Ib1 to the total amplitude As of the brain waves to the ratio of the amplitude of the brain waves in the predetermined frequency band Af in the second electroencephalogram information Ib2 to the total amplitude As of the brain waves, and the ratio (LF / HF).

[0096] The first question generation step S101 is a step in which the information acquisition unit 10 generates a question to be presented to the subject 110 based on the first electroencephalogram information Ib1. The space presentation step S102 may be a step in which the space presentation unit 20 presents the production space 200 based on the answer to the question. The second question generation step S105 is a step in which the information acquisition unit 10 further generates another question to be presented to the subject 110 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2. The space adjustment step S108 may be a step in which the space presentation unit 20 adjusts the production space 200 based on the answer of the subject 110 to the other question.

[0097] The second information acquisition step S104 may be a step in which the information acquisition unit 10 further acquires the gaze information Ie indicating the position where the subject 110 is looking. The space adjustment step S108 may be a step in which the space presentation unit 20 adjusts the production space 200 based on the gaze information Ie. The space adjustment step S108 may also be a step in which the space presentation unit 20 adjusts the production space 200 based on the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2 and the gaze information Ie.

[0098] The first timing acquisition step S103 is a step in which the information acquisition unit 10 acquires the first timing t1 at which the space presentation unit 20 presents the production space 200 corresponding to the first electroencephalogram information Ib1 in the space presentation step S102. The second timing acquisition step S107 is a step in which the information acquisition unit 10 acquires the second timing t2 of the change from the first electroencephalogram information Ib1 to the second electroencephalogram information Ib2. The space adjustment step S108 is a step in which the space presentation unit 20 adjusts the production space 200 based on the relationship between the first timing t1 and the second timing t2.

[0099] The spatial presentation step S102 may be a step in which the spatial presentation unit 20 presents an effect space 200 that changes over time according to the first brain wave information Ib1 from the first timing t1 to the second timing t2. The second information acquisition step S104 may be a step in which the information acquisition unit 10 acquires the type K of the effect space 200 based on the effect space 200 that changes over time. The spatial adjustment step S108 may be a step in which the spatial presentation unit 20 adjusts the effect space 200 based on the type K of the effect space 200. The second information acquisition step S104 may be a step in which the information acquisition unit 10 acquires the second brain wave information Ib2 at a timing based on the type K of the effect space 200.

[0100] FIG. 11 is a diagram showing an example of a computer 2200 in which the spatial presentation device 100 according to an embodiment of the present invention may be wholly or partially embodied. The program installed in the computer 2200 can cause the computer 2200 to perform operations associated with the spatial presentation device 100 according to the embodiment of the present invention, or function as one or more sections of the spatial presentation device 100, or execute the operations or the one or more sections, or cause the computer 2200 to execute each stage (see FIG. 10) of the method according to the present invention. The program may be executed by the CPU 2212 so as to cause the computer 2200 to execute specific operations associated with some or all of the blocks in the flowcharts (FIG. 10) and block diagrams (FIG. 5) described herein.

[0101] A computer 2200 according to one embodiment of the present invention includes a CPU 2212, a RAM 2214, a graphic controller 2216, and a display device 2218. The CPU 2212, the RAM 2214, the graphic controller 2216, and the display device 2218 are interconnected by a host controller 2210. The computer 2200 further includes input / output units such as a communication interface 2222, a hard disk drive 2224, a DVD-ROM drive 2226, and an IC card drive. The communication interface 2222, the hard disk drive 2224, the DVD-ROM drive 2226, and the IC card drive are connected to the host controller 2210 via an input / output controller 2220. The computer further includes legacy input / output units such as a ROM 2230 and a keyboard 2242. The ROM 2230 and the keyboard 2242 are connected to the input / output controller 2220 via an input / output chip 2240.

[0102] The CPU 2212 controls each unit by operating according to programs stored in the ROM 2230 and the RAM 2214. The graphic controller 2216 causes image data generated by the CPU 2212 to be displayed on the display device 2218 by acquiring the image data in a frame buffer or the like provided in the RAM 2214 or in the RAM 2214.

[0103] The communication interface 2222 communicates with other electronic devices via a network. The hard disk drive 2224 stores programs and data used by the CPU 2212 in the computer 2200. The DVD-ROM drive 2226 reads a program or data from the DVD-ROM 2201 and provides the read program or data to the hard disk drive 2224 via the RAM 2214. The IC card drive reads programs and data from an IC card or writes programs and data to an IC card.

[0104] The ROM 2230 stores a boot program or the like executed by the computer 2200 when activated, or a program that depends on the hardware of the computer 2200. The input / output chip 2240 may be connected to the input / output controller 2220 via various input / output units such as a parallel port, a serial port, a keyboard port, and a mouse port.

[0105] The program is provided by a computer-readable medium such as a DVD-ROM 2201 or an IC card. The program is read from the computer-readable medium, installed in the hard disk drive 2224, the RAM 2214, or the ROM 2230, which is also an example of a computer-readable medium, and executed by the CPU 2212. The information processing described in these programs is read by the computer 2200, resulting in cooperation between the programs and the various types of hardware resources described above. The apparatus or method may be configured by realizing the operation or processing of information according to the use of the computer 2200.

[0106] For example, when communication is executed between the computer 2200 and an external device, the CPU 2212 may execute a communication program loaded into the RAM 2214 and instruct the communication interface 2222 to perform communication processing based on the processing described in the communication program. Under the control of the CPU 2212, the communication interface 2222 reads the transmission data stored in the transmission buffer processing area provided in a recording medium such as the RAM 2214, the hard disk drive 2224, the DVD-ROM 2201, or the IC card, transmits the read transmission data to the network, or writes the received data received from the network to the reception buffer processing area provided on the recording medium.

[0107] The CPU 2212 may cause all or necessary parts of files or databases stored in external recording media such as a hard disk drive 2224, a DVD-ROM drive 2226 (DVD-ROM 2201), an IC card, etc. to be read into the RAM 2214. The CPU 2212 may execute various types of processing on the data on the RAM 2214. Next, the CPU 2212 may write back the processed data to the external recording media.

[0108] Various types of information such as various types of programs, data, tables, and databases may be stored in a recording medium and be processed. The CPU 2212 may execute various types of processing including various types of operations, information processing, condition judgment, conditional branch, unconditional branch, information search or replacement, etc. specified by the instruction sequence of the program described in the present disclosure on the data read from the RAM 2214. The CPU 2212 may write back the result to the RAM 2214.

[0109] The CPU 2212 may search for information in files, databases, etc. in the recording medium. For example, when a plurality of entries each having an attribute value of a first attribute associated with an attribute value of a second attribute are stored in the recording medium, the CPU 2212 searches for an entry that matches the condition where the attribute value of the first attribute is specified from among the plurality of entries, reads the attribute value of the second attribute stored in the entry, and by reading the second attribute value, may obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition.

[0110] The above-described program or software module may be stored on the computer 2200 or on a computer-readable medium of the computer 2200. A recording medium such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet can be used as a computer-readable medium. The program may be provided to the computer 2200 by the recording medium.

[0111] As described above, the present invention has been described using embodiments. However, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is obvious to those skilled in the art that various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that forms with such changes or improvements can also be included in the technical scope of the present invention.

[0112] It should be noted that the execution order of each process such as operations, procedures, steps, and stages in the apparatuses, systems, programs, and methods shown in the claims, the specification, and the drawings is not explicitly stated as "before" or "preceding" etc., and can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flows in the claims, the specification, and the drawings, even if "first," "next," etc. are used for convenience in the description, it does not mean that it is essential to implement in this order.

Description of Reference Numerals

[0113] 10... Information acquisition unit, 20... Spatial presentation unit, 30... State estimation unit, 40... Storage unit, 90... Control unit, 100... Spatial presentation device, 110... Subject, 200... Presentation space, 210... Image element

Claims

1. An information acquisition unit that acquires electroencephalogram information of a subject, A space presentation unit that presents a production space to the subject, Comprising, The information acquisition unit acquires first electroencephalogram information before the production space is presented, The space presentation unit presents the production space according to the first electroencephalogram information, The information acquisition unit acquires second electroencephalogram information after the production space is presented, The space presentation unit adjusts the production space based on the change from the first electroencephalogram information to the second electroencephalogram information, Space presentation device.

2. Further comprising a state estimation unit that estimates the state of the subject based on the electroencephalogram information of the subject, The space presentation unit presents the production space based on the state of the subject, The space presentation device according to claim 1.

3. The information acquisition unit further acquires biometric information of the subject, The state estimation unit estimates the state of the subject based on the electroencephalogram information and the biometric information, The space presentation device according to claim 2.

4. The state estimation unit is based on the ratio of the amplitude of the electroencephalogram in a predetermined frequency band in the first electroencephalogram information to the total amplitude, to the ratio of the amplitude of the electroencephalogram in the frequency band in the second electroencephalogram information to the total amplitude, and the ratio of the magnitude of the first power spectrum in the heartbeat of the subject to the magnitude of the second power spectrum, to estimate the state, The total amplitude is the sum of the amplitudes of alpha waves, beta waves, theta waves, gamma waves and delta waves, The frequency band of the second power spectrum is a higher frequency band than the frequency band of the first power spectrum, The space presentation device according to claim 3.

5. The state estimation unit is based on the ratio of the magnitude of the first power spectrum to the magnitude of the second power spectrum after the production space is presented, and the magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. The magnitude of the first power spectrum to the magnitude of the second power spectrum. 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The magnitude of the first power spectrum to the magnitude of the second power spectrum. ​ ​ ​ The state estimation unit estimates one of the plurality of states based on the change from the ratio of the amplitude of the brain wave in the first brain wave information to the total amplitude to the ratio of the amplitude of the brain wave in the second brain wave information to the total amplitude, and the ratio of the magnitude of the first power spectrum to the magnitude of the second power spectrum. The spatial presentation device according to claim 4.

7. The brain wave in the frequency band is at least one of a delta wave, a theta wave, a low alpha wave, and a middle alpha wave. The spatial presentation device according to claim 6.

8. The brain wave in the frequency band is at least one of a high alpha wave, a low beta wave, a high beta wave, and a gamma wave. The spatial presentation device according to claim 6.

9. The information acquisition unit generates a question to be presented to the subject based on the first brain wave information. The spatial presentation unit presents the production space based on the answer to the question. The spatial presentation device according to any one of claims 1 to 8.

10. The information acquisition unit further acquires line-of-sight information indicating the position being visually recognized by the subject. The spatial presentation unit adjusts the production space based on the line-of-sight information. The spatial presentation device according to any one of claims 1 to 8.

11. The information acquisition unit further acquires a first timing at which the spatial presentation unit presents the production space according to the first brain wave information, and a second timing of the change from the first brain wave information to the second brain wave information. The spatial presentation unit adjusts the production space based on the relationship between the first timing and the second timing. The spatial presentation device according to any one of claims 1 to 8.

12. The spatial presentation unit presents the production space that changes over time according to the first brain wave information from the first timing to the second timing. The information acquisition unit acquires the type of the production space based on the production space that changes over time. The spatial presentation unit adjusts the production space based on the type of the production space. The spatial presentation device according to claim 11.

13. The information acquisition unit acquires the second brain wave information at a timing based on the type of the production space. The spatial presentation device according to claim 11.

14. A first information acquisition step in which the information acquisition unit acquires the first brain wave information before the production space is presented. A space presentation step in which a space presentation unit presents the presentation space according to the first electroencephalogram information; A second information acquisition step in which the information acquisition unit acquires second electroencephalogram information after the presentation space is presented; A space adjustment step in which the space presentation unit adjusts the presentation space based on the change from the first electroencephalogram information to the second electroencephalogram information; A space presentation method comprising the above.

15. On a computer, A first information acquisition step of acquiring first electroencephalogram information before a presentation space is presented; A space presentation step of presenting the presentation space according to the first electroencephalogram information; A second information acquisition step of acquiring second electroencephalogram information after the presentation space is presented; A space adjustment step of adjusting the presentation space based on the change from the first electroencephalogram information to the second electroencephalogram information; A space presentation program for causing the above to be executed.

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