WO2022259406A1

WO2022259406A1 - Light irradiation control system, light irradiation control device, and light irradiation control program

Info

Publication number: WO2022259406A1
Application number: PCT/JP2021/021880
Authority: WO
Inventors: 太郎上野
Original assignee: サスメド株式会社
Priority date: 2021-06-09
Filing date: 2021-06-09
Publication date: 2022-12-15
Also published as: JPWO2022259406A1; JP6991638B1

Abstract

The present invention comprises a circadian rhythm determination unit (12) for determining a circadian rhythm of a user on the basis of information indicating daily sleep time zones of the user, a light irradiation timing setting unit (13) for setting light irradiation timing on the basis of the determined circadian rhythm, and a light irradiation control unit (15) for controlling a backlight (22) so as to irradiate a display screen of a terminal with light of a predetermined intensity or higher for a predetermined time when the set light irradiation timing is reached, such that a maximum biorhythm adjustment effect by the light irradiation can be achieved in a manner tailored to individual users by causing the display screen of the terminal to be irradiated with the light of the predetermined intensity or higher at light irradiation timings set in accordance with different circadian rhythms of the respective users.

Description

Light irradiation control system, light irradiation control device, and light irradiation control program

The present invention relates to a light irradiation control system, a light irradiation control device, and a light irradiation control program, and is particularly suitable for use in a system for controlling light irradiation from a light source of a display to a display screen.

Living organisms have internal clocks that control periodic phenomena related to biological functions. Typical periodic phenomena include sleep/wakefulness, changes in body temperature and blood pressure, etc. These are particularly controlled by a biorhythm called a circadian cycle (circadian rhythm). The circadian rhythm is tuned to a 24-hour period, which is a period of one day, mainly by the light environment.

　In modern society, the development of lighting has led to a more nighttime lifestyle. For this reason, synchronization of biorhythms with the light environment is not achieved well, and health problems such as sleep disorders have arisen due to deviations in biorhythms. On the other hand, there are known techniques for adjusting the biorhythm by artificially controlling the light environment (see Patent Documents 1 and 2, for example).

In the system described in Patent Document 1, the display screen of a smartphone, game machine, personal computer, liquid crystal television, etc. is used to irradiate the user with light of a specific wavelength, thereby suppressing the adverse effects caused by various lights. and to have a positive effect on the body. This patent document 1 discloses that special light is emitted at a predetermined time (predetermined time in the evening such as before going to bed, or in the morning or afternoon such as when waking up).

Patent Document 2 discloses an image display device that exerts a function of adjusting the body clock. The display unit included in the image display device described in Patent Document 2 includes a first region that displays a predetermined image and a second region that displays an image in which the intensity of light in a specific wavelength range (445 nm to 480 nm) is controlled. area and independently provided. Then, according to the control pattern selected by the user, the intensity of the light in the specific wavelength range irradiated to the second region is controlled to be strong (or weak) during the time when the user is awakened (or sedated).

WO2018/124036 JP-A-2009-37148

However, in the techniques described in Patent Literatures 1 and 2, since light is irradiated at a predetermined time, the effect of adjusting the biorhythm by light irradiation is maximized according to each individual user. difficult. In the technique described in Patent Document 2, according to a control pattern selected by the user from among several control patterns, the irradiation intensity is adjusted according to whether the irradiation time corresponds to the awakening period or the sedation period. However, it is only possible to make adjustments only for the control patterns that are suitable.

The present invention has been made to solve such problems, and an object of the present invention is to make it possible to more effectively adjust the biorhythm by light irradiation according to individual users. .

In order to solve the above-described problems, the present invention identifies the user's circadian rhythm based on information indicating the user's daily sleep time zone, and sets the light irradiation timing based on the identified circadian rhythm. do. Then, when the set light irradiation timing comes, the display screen of the terminal is irradiated with light having a predetermined intensity or more for a predetermined time.

According to the present invention configured as described above, the display screen of the terminal is irradiated with light having a predetermined intensity or more at the light irradiation timing set according to the circadian rhythm that differs for each user. The adjustment effect of can be maximized according to individual users.

It is a block diagram which shows the functional structural example of the light irradiation control apparatus by this embodiment. It is a figure for demonstrating the type of circadian rhythm sleep disorder. It is a figure for demonstrating the type of circadian rhythm sleep disorder. It is a figure for demonstrating the type of circadian rhythm sleep disorder. It is a flowchart which shows the operation example of the circadian-rhythm specific|specification part by this embodiment, and a light irradiation timing setting part. 4 is a flow chart showing an operation example of a light irradiation control unit according to the embodiment; FIG. 11 is a block diagram showing a functional configuration example of a light irradiation control device according to a second modified example; FIG. 11 is a block diagram showing a functional configuration example of a light irradiation control device according to a third modified example; It is a figure which shows the whole structural example of the light irradiation control system by this embodiment.

An embodiment of the present invention will be described below based on the drawings. FIG. 1 is a block diagram showing a functional configuration example of a light irradiation control device 1 according to this embodiment. The light irradiation control device 1 of the present embodiment is provided, for example, in a mobile terminal having a display that displays information by irradiating a display screen with light from a light source. The mobile terminal is configured by, for example, a smartphone or tablet equipped with a liquid crystal display device or an organic EL display device using a backlight as a light source.

As shown in FIG. 1, the light irradiation control device 1 of the present embodiment includes an information input unit 11, a circadian rhythm identification unit 12, a light irradiation timing setting unit 13, a recording unit 14, and a light irradiation control unit 15 as functional configurations. It has Moreover, the portable terminal provided with the light irradiation control device 1 of the present embodiment includes a sleep-related information storage unit 21 as a storage medium and a backlight 22 as a display light source.

Each of the functional blocks 11 to 15 can be configured by hardware, DSP (Digital Signal Processor), or software. For example, when configured by software, each of the functional blocks 11 to 15 is actually configured with a CPU, RAM, ROM, etc. of the mobile terminal, and is stored in a storage medium such as RAM, ROM, hard disk, or semiconductor memory. It is realized by operating a sleep disorder treatment support program (hereinafter referred to as a treatment application).

The therapeutic application is an application that aims to improve the user's lifestyle by providing the following functions, thereby supporting the treatment of sleep disorders, and includes a light irradiation control program. The therapeutic application has a function for the user to input various information about sleep state and physical condition at any time, a function for the user to perform a sleep test, a function to perform a predetermined analysis based on the input information and the results of the sleep test, Based on the analysis results, it has functions such as outputting messages regarding advice on actions that will lead to improvement of sleep disorders, adjusting the user's biorhythm by light exposure, and so on. This therapeutic application can be downloaded and installed in a mobile terminal via a communication network such as the Internet or a mobile phone network.

The information input unit 11 inputs information indicating the user's sleep time period (hereinafter referred to as sleep time period information) through the user's operation on the input interface (touch panel, keyboard, mouse, etc.) of the mobile terminal. This information input is performed on a daily basis. The sleep time period information input by the information input unit 11 is stored in the sleep related information storage unit 21 .

The sleep time zone information is, for example, information indicating sleep onset time and awakening time. As for the sleep onset time, since the user himself/herself cannot grasp the exact time, it is sufficient to input an approximate time that is subjectively grasped. It should be noted that the sleep time period information input by the information input unit 11 may be information indicating bedtime and wake-up time. An example using the sleep onset time and the awakening time will be described below.

The circadian rhythm identification unit 12 identifies the user's circadian rhythm based on the user's daily sleep time slot information stored in the sleep-related information storage unit 21 . For example, the circadian rhythm identification unit 12 determines the time period during which the user is asleep (sleep onset) as the period of the user's body clock based on the sleep time period information for a certain period stored in the sleep-related information storage unit 21 . Identify trends in the time period from the time of day until the time of waking) and the waking time period (time period other than the sleeping time period).

For example, the circadian rhythm identification unit 12 calculates the variance for each of the sleep onset time and the awakening time in a certain period, and if the variance is less than a predetermined value, the average value of the sleep onset time and the average value of the awakening time in the certain period. is specified as the sleeping time zone (average value), and the other time zones are specified as the waking time zone (average value). On the other hand, if the variance is equal to or greater than a predetermined value, the average value of the time periods during which the user is asleep and the time period during which the user is awake is calculated instead of calculating the average value of the time period during which the user is asleep and the time period during which the user is awake. identified on a daily basis.

The circadian rhythm identification unit 12 also identifies the type of circadian rhythm sleep disorder based on the sleep time period information for a certain period stored in the sleep-related information storage unit 21 . The type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12 is one of delayed sleep phase syndrome, advanced sleep phase syndrome, and non-24-hour sleep-wake syndrome. If the variance is less than a predetermined value, it corresponds to delayed sleep phase syndrome or advanced sleep phase syndrome, and if the variance is greater than or equal to a predetermined value, it can be recognized that it corresponds to non-24-hour sleep-wake syndrome.

In delayed sleep phase syndrome, as shown in FIG. 2A, the awakening time (or wake-up time) is generally delayed compared to the sleep time zone (for example, 23 to 7 o'clock) that is generally said to be normal. symptom. The advanced sleep phase syndrome is a symptom in which the sleep onset time (or bedtime) is generally advanced compared to the normal sleep period, as shown in FIG. 2B. The non-24-hour sleep-wake syndrome is a symptom in which the body clock is longer than 24 hours and the sleep time slot retreats day by day, as shown in FIG. 2C.

The light irradiation timing setting unit 13 determines whether the body clock is in the morning or in the evening according to the user's circadian rhythm and the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12. Set the light irradiation timing to . The recording unit 14 stores information indicating the light irradiation timing set by the light irradiation timing setting unit 13 in the sleep-related information storage unit 21 .

If the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12 is delayed sleep phase syndrome, the light irradiation timing setting unit 13 is based on the circadian rhythm identified by the circadian rhythm identification unit 12, The body clock sets the light irradiation timing in the morning time zone. By irradiating the body clock with light in the morning time zone, it can be expected to advance the body clock.

In this embodiment, as an example, the time zone in which the body clock is in the morning is defined as the time zone from the time when the user having the body clock wakes up to several hours (for example, 5 hours later). However, since the time at which the user wakes up varies from day to day, for example, the time period from the average value of the awakening time in a certain period to several hours later is set as "the body clock is in the morning" in the case of delayed sleep phase syndrome. can be

For example, the circadian rhythm specified by the circadian rhythm specifying unit 12 based on the sleep time period information for a certain period stored in the sleep-related information storage unit 21 may indicate that the body clock is normal, as shown in FIG. 2A. If you are about 4 hours behind the normal circadian rhythm, your body clock will be in the morning time zone from 11:00 to 16:00. Therefore, the light irradiation timing setting unit 13 sets the light irradiation timing for the next fixed period to the time zone from 11:00 to 16:00.

In this case, it is preferable to set the light irradiation timing as early as possible after awakening, for example, 11:00 is set as the light irradiation timing. Considering that there may be days when you wake up later than 11:00, which is the average awakening time, the light irradiation timing should be set to 12:00, which is a predetermined time (for example, one hour later) after the average. can be

If the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12 is advanced sleep phase syndrome, the light irradiation timing setting unit 13 is based on the circadian rhythm identified by the circadian rhythm identification unit 12, The body clock sets the light irradiation timing for the night time zone. By irradiating the body clock with light during the night time zone, it can be expected to delay the body clock.

In this embodiment, as an example, the body clock defines the night time zone as the time zone from several hours (for example, 5 hours) before the time when the user having the body clock falls asleep to the time when the user wakes up. . However, since the time at which the user falls asleep and the time at which the user wakes up differ from day to day, for example, the time period from the time several hours before the average value of the sleep onset time to the average value of the awakening time in a certain period is used in the case of advanced sleep phase syndrome It may be set to "the body clock is in the night time zone".

For example, the circadian rhythm specified by the circadian rhythm specifying unit 12 based on the sleep time zone information for a certain period stored in the sleep-related information storage unit 21 may indicate that the body clock is normal, as shown in FIG. 2B. If the body clock is about 5 hours ahead of normal circadian rhythm, the night time zone is after 13:00 (5 hours before 18:00). Therefore, the light irradiation timing setting unit 13 sets the light irradiation timing for the next fixed period to the time zone after 13:00. In this case, it takes time to fall asleep after going to bed, and it is preferable to set the light irradiation timing as late as possible before going to bed. set.

If the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit is non-24-hour sleep-wake syndrome, the light irradiation timing setting unit 13 is identified by the circadian rhythm identification unit 12 Based on the circadian rhythm , during a period in which the user's circadian rhythm is delayed from the normal state by the first predetermined time T1 or more, the body clock sets the light irradiation timing in the night time zone, and the user's circadian rhythm is set from the normal state. During the period in which the second predetermined time T2 or more has not retreated, the body clock sets the light irradiation timing in the morning time zone (T1>T2).

In the case of non-24-hour sleep-wake syndrome, the user's body clock retreats day by day, returning to the original body clock after a few weeks. Repeat this over and over. Therefore, in the case of non-24-hour sleep-wake syndrome, the body clock does not specify the night time zone and the morning time zone from the average value of the time zone in which the user is asleep and the average value of the time zone in which the user is awake. , the body clock determines night and morning hours on a daily basis. This is based on the assumption that if the sleep disorder does not improve, the body clock will continue to deviate in the same manner for the next certain period of time.

For example, the circadian rhythm specified by the circadian rhythm specifying unit 12 based on the sleep time zone information for a certain period stored in the sleep-related information storage unit 21 is a non-24-hour sleep/wake cycle as shown in FIG. 2C. When it is the circadian rhythm of a syndrome, the light irradiation timing setting part 13 sets the light irradiation timing in the following fixed period, for example as follows.

That is, during the period of four days from the top, the user's circadian rhythm has not retreated from the normal state by the second predetermined time (for example, two hours) or more, so the body clock sets the light irradiation timing in the morning time zone. By setting, it prevents the body clock from going backwards. For example, the time after a predetermined time (for example, 1 hour) after each awakening time indicated by the sleep time period information during the four-day period stored in the sleep-related information storage unit 21 is changed to the next fixed period. Each is set as the light irradiation timing for the first four days in the medium.

On the other hand, during the six days from the bottom, the user's circadian rhythm is set back from the normal state by the first predetermined time (for example, 10 hours) or more, so the body clock sets the light irradiation timing to the night time zone. set. For example, the time a predetermined time (for example, one hour) before each sleep onset time indicated by the sleep time zone information during the period of six days stored in the sleep-related information storage unit 21 is changed to the next predetermined period. Each is set as the light irradiation timing for the last 6 days in the medium.

The light irradiation control unit 15 monitors whether or not the light irradiation timing set by the light irradiation timing setting unit 13 has come, based on the light irradiation timing information stored in the sleep-related information storage unit 21, and determines the light irradiation timing. Then, the backlight 22 is controlled to irradiate the display screen of the portable terminal with light having a predetermined intensity or more for a predetermined time. Here, the predetermined intensity can be, for example, the average value of the irradiation intensity of the sunlight emitted when the person is outdoors during the daytime on a sunny day. Alternatively, the irradiation intensity of the backlight 22 during normal use, which is set by the user in the portable terminal, may be set to a predetermined intensity, and light stronger than that during normal use may be emitted for a predetermined period of time.

In the case of mobile devices such as tablets and smartphones, users will almost certainly look at the display when using it. Therefore, by irradiating the display screen of the mobile terminal with light having a predetermined intensity or more, the user using the mobile terminal can be exposed to strong light. Here, in the present embodiment, the display screen of the mobile terminal is irradiated with light having a predetermined intensity or more at the light irradiation timing set according to the circadian rhythm that differs for each user. can be maximized according to individual users.

3 and 4 are flow charts showing an operation example of the light irradiation control device 1 according to this embodiment. FIG. 3 shows an operation example of the circadian rhythm identification unit 12 and the light irradiation timing setting unit 13, and FIG. 4 shows an operation example of the light irradiation control unit 15. As shown in FIG. The flowchart shown in FIG. 3 is executed at regular intervals (for example, every two weeks). The flowchart shown in FIG. 4 is executed daily.

In FIG. 3, the circadian rhythm identification unit 12 determines whether a certain period of time has passed since the previous process (step S1). If the fixed period has not passed, the process returns to step S1. When a certain period of time has elapsed, the circadian rhythm identification unit 12 determines the user's circadian rhythm (user's The average period of the body clock) is specified (step S2).

In addition, the circadian rhythm identification unit 12 identifies the type of circadian rhythm sleep disorder based on the daily sleep time slot information for a certain period of time of the user stored in the sleep-related information storage unit 21 (step S3 ). Then, the light irradiation timing setting unit 13 sets the light irradiation timing according to the circadian rhythm of the user identified by the circadian rhythm identification unit 12 and the type of circadian rhythm sleep disorder (step S4), and the recording unit 14 stores information indicating the set light irradiation timing in the sleep-related information storage unit 21 (step S5). As a result, the processing of the flowchart shown in FIG. 3 ends.

In FIG. 4, the light irradiation control unit 15 determines whether or not the light irradiation timing set by the light irradiation timing setting unit 13 has come, based on the light irradiation timing information stored in the sleep-related information storage unit 21. (Step S11). If the light irradiation timing has not come, the process returns to step S11.

On the other hand, when it is determined that the light irradiation timing has come, the light irradiation control unit 15 controls the backlight 22 so as to irradiate the display screen of the mobile terminal with light having a predetermined intensity or more for a predetermined time (step S12). . Thus, the processing of the flowchart shown in FIG. 4 ends.

As described in detail above, in the present embodiment, based on the information indicating the user's daily sleep time period, the user's circadian rhythm and the type of circadian rhythm sleep disorder are identified, and based on the identified result The light irradiation timing is set. Then, when the set light irradiation timing comes, the display screen of the portable terminal is irradiated with light having a predetermined intensity or more for a predetermined time.

According to the present embodiment configured in this way, the display screen of the terminal is irradiated with light having a predetermined intensity or more at the light irradiation timing set according to the circadian rhythm and the type of circadian rhythm sleep disorder that differ for each user. Therefore, the adjustment effect of the biorhythm by light irradiation can be maximized according to each individual user.

<First modification>
In the above embodiment, an example in which a specific time is set as the light irradiation timing has been described, but the light irradiation timing is not limited to an example in which the time is set. For example, the light irradiation timing may be set according to the state of the user. For example, when the body clock sets the light irradiation timing in the morning time zone, the light irradiation timing is set to "when the user first uses the mobile terminal after waking up when the body clock is in the morning". You may do so.

In this case, the light irradiation timing setting unit 13 sets, for example, "11:00 to 16:00" as the time zone in which the body clock is in the morning in the example of FIG. Set "when". The light irradiation control unit 15 causes the display screen of the portable terminal to be irradiated with light having a predetermined intensity or more for a predetermined period of time when the first use of the portable terminal is detected in the time period from 11:00 to 16:00. Control lights 22 . Here, the power of the mobile terminal is switched from off to on, the backlight 22 is switched from the non-driving state to the driving state, or the touch panel on the display screen is operated. It is possible to detect the first use of the mobile terminal by detecting whether the mobile terminal is used for the first time.

Further, when the body clock sets the light irradiation timing in the night time zone, the light irradiation timing setting unit 13 sets the body clock to "after 13:00" as the night time zone, for example, in the example of FIG. 2B. Alternatively, the light irradiation timing may be set to "before the user goes to bed" as the state of the user. In this case, for example, when the information input unit 11 detects that the bedtime is being input, the light irradiation control unit 15 regards it as the last use of the mobile terminal before the user goes to bed. It is possible to control the backlight 22 so as to irradiate the display screen of the mobile terminal with light having a predetermined intensity or more for a predetermined time after the completion of the input.

<Second modification>
In the above embodiment, an example was described in which the circadian rhythm is improved by irradiating the user with strong light (increasing the amount of light exposure) through the display screen of the mobile terminal. The circadian rhythm may be improved by limiting the exposure of the user to light through the device (reducing the amount of light exposure). FIG. 5 is a block diagram showing a functional configuration example of the light irradiation control device 1A in this case.

　In FIG. 5, the parts denoted by the same reference numerals as those shown in FIG. 1 have the same functions, and redundant explanations are omitted here. As shown in FIG. 5, the light irradiation control device 1A according to the second modification further includes a time limit setting unit 16 and a use limit unit 17 as functional configurations. Further, the light irradiation control device 1A according to the second modification includes a recording section 14A instead of the recording section 14. FIG.

The limit period setting unit 16 does not include the light irradiation timing set by the light irradiation timing setting unit 13 based on the user's circadian rhythm and the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12. Set the usage restriction period of the mobile terminal in the time period. The recording unit 14A stores information indicating the usage restriction period set by the restriction period setting unit 16 in the sleep-related information storage unit 21 .

For example, if the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12 is delayed sleep phase syndrome, the light irradiation timing setting unit 13 sets the light irradiation timing in the morning time zone of the body clock, The restriction period setting unit 16 sets the usage restriction period in the nighttime zone of the body clock. For example, in the case of the circadian rhythm as shown in FIG. 2A, the light irradiation timing setting unit 13 sets 11:00 as the light irradiation timing. Also, the restricted period setting unit 16 sets, for example, 2:00 to 9:00 as the usage restricted period of the portable terminal. In this way, it is possible to prevent the circadian rhythm from retreating due to the user's body clock being exposed to light in the evening time zone, and to advance the circadian rhythm by having the body clock being exposed to light in the morning time zone. can bring it closer to a normal state.

Further, when the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12 is advanced sleep phase syndrome, the light irradiation timing setting unit 13 sets the light irradiation timing during the night time zone of the body clock, The restriction period setting unit 16 sets the usage restriction period in the morning time zone of the body clock. For example, in the case of the circadian rhythm as shown in FIG. 2B, the light irradiation timing setting unit 13 sets 17:00 as the light irradiation timing. Also, the restricted period setting unit 16 sets, for example, 2:00 to 7:00 as the usage restricted period of the portable terminal.

Further, if the type of circadian rhythm sleep disorder identified by the circadian rhythm identification unit 12 is non-24-hour sleep-wake syndrome, the period in which the user's circadian rhythm is retreating from the normal state for the first predetermined time T1 or more In the middle, the light irradiation timing setting unit 13 sets the light irradiation timing in the nighttime zone of the body clock. On the other hand, during a period in which the user's circadian rhythm has not retreated from the normal state by a second predetermined time T2 (T1>T2) or longer, the light irradiation timing setting unit 13 sets the light irradiation timing to the morning time zone of the body clock. At the same time, the restricted period setting unit 16 sets the restricted usage period to a time zone when the body clock is at night.

The use restriction unit 17 monitors whether the use restriction period set by the restriction period setting unit 16 is in progress based on the information on the usage restriction period stored in the sleep-related information storage unit 21. In the case of , control is performed to limit the use of the mobile terminal. For example, the use restriction unit 17 locks the treatment application so that it cannot be used. Alternatively, by controlling the backlight 22 so that the display luminance of the display is at or below a predetermined level, the display screen may be restricted from being displayed at a predetermined luminance or higher.

<Third Modification>
FIG. 6 is a block diagram showing a functional configuration example of a light irradiation control device 1B according to the third modification. In FIG. 6, the components denoted by the same reference numerals as those shown in FIG. 1 have the same functions, and redundant description will be omitted here. As shown in FIG. 6, the light irradiation control device 1B according to the third modification further includes a notification unit 18 as a functional configuration. Further, the light irradiation control device 1B according to the third modification includes a light irradiation control section 15B instead of the light irradiation control section 15. FIG.

When the light irradiation timing set by the light irradiation timing setting unit 13 has come, the notification unit 18 notifies the user by a means recognizable by the user regardless of whether the user is looking at the display screen of the portable terminal. . For example, the notification unit 18 vibrates the mobile terminal by activating the vibrator of the mobile terminal. Instead of or in addition to this, the notification unit 18 may output a predetermined notification sound from the speaker of the mobile terminal.

The light irradiation control unit 15B controls the backlight 22 so as to irradiate the display screen with light having a predetermined intensity or more after the notification by the notification unit 18 is performed. At the timing set by the light irradiation timing setting unit 13, the user may not be using the mobile terminal or not looking at the display screen. Even in this case, when the notification is made by the notification unit 18, the user is likely to look at the display screen to confirm the meaning of the notification. By controlling the backlight 22 by the light irradiation control unit 15B at this timing, it is possible to more reliably irradiate the user with light.

Although a configuration example in which the configuration in FIG. 1 is used as a base and modified is shown here, a configuration in which the configuration in FIG. 5 is used as a base and modified is also possible.

<Fourth Modification>
In the above embodiment, an example of specifying the user's circadian rhythm and the type of circadian rhythm sleep disorder and setting the light irradiation timing based on these has been described, but the present invention is not limited to this. For example, the circadian rhythm identification unit 12 may only identify the circadian rhythm without identifying the type of circadian rhythm sleep disorder. In this case, the light irradiation timing setting unit 13 sets the light irradiation timing based on the circadian rhythm specified by the circadian rhythm specifying unit 12 .

For example, when the circadian rhythm identified by the circadian rhythm identification unit 12 is retreating from the normal circadian rhythm, the body clock sets the light irradiation timing in the night time zone, while the circadian rhythm identification unit If the circadian rhythm specified by 12 is ahead of the normal circadian rhythm, the body clock may set the light irradiation timing in the morning time zone.

<Fifth Modification>
In the above embodiment, the configuration in which the light irradiation control device 1 of the mobile terminal includes the circadian rhythm identification unit 12, the light irradiation timing setting unit 13, the recording unit 14, and the light irradiation control unit 15 has been described. Not limited. For example, as shown in FIG. 7, a portable terminal 100 and a server device 200 connected thereto via a communication network 500 constitute a light irradiation control system. The light irradiation control unit 15 may be provided, and the server device 200 may be provided with the circadian rhythm identification unit 12 and the light irradiation timing setting unit 13 .

In this case, the daily sleep time slot information input by the information input unit 11 is transmitted to the server device 200 . The server device 200 specifies the circadian rhythm and sets the light irradiation timing at regular intervals, and transmits information indicating the set light irradiation timing to the mobile terminal 100 . In the mobile terminal 100, the information of the light irradiation timing sent from the server device 200 is stored in the sleep-related information storage unit 21, and the light irradiation control unit 15 controls the backlight 22 so that light irradiation is performed at the light irradiation timing. .

The same applies to the second to fourth modifications, and the mobile terminal 100 and the server device 200 may constitute a light irradiation control system. For example, in the second modification, the mobile terminal 100 includes the information input unit 11, the recording unit 14A, the light irradiation control unit 15, and the use restriction unit 17, and the server device 200 includes the circadian rhythm identification unit 12, light irradiation timing setting The unit 13 and the limit period setting unit 16 may be provided. Further, in the third modification, the mobile terminal 100 includes the information input unit 11, the recording unit 14, the light irradiation control unit 15B, and the notification unit 18, and the server device 200 includes the circadian rhythm identification unit 12 and the light irradiation timing setting unit. 13 may be provided.

<Other Modifications>
In the above embodiment, the variance is calculated for each of the sleep onset time and awakening time in a certain period, and if the variance is less than a predetermined value (the type of circadian rhythm sleep disorder is delayed sleep phase syndrome or advanced sleep phase syndrome) , specify the user's circadian rhythm as the time zone from the average value of the sleep onset time to the average value of the awakening time in a certain period as the time zone in which the user is asleep, and the other time zone as the time zone in which the user is awake. Although an example has been described, the invention is not limited to this. For example, the time period from the earliest sleep onset time in a certain period to the latest awakening time in a certain period is defined as the time period in which the user is asleep, and the rest of the time period is the time period in which the user is awake. A user's circadian rhythm may be specified as a band.

In addition, the time zone in which the body clock is in the morning and the time zone in which the body clock is at night described in the above embodiment are examples of definitions, and are not limited to these. For example, in the case of normal circadian rhythm, 7:00 to 12:00 is the morning time zone and 18:00 to 7:00 is the evening time zone, and the user's circadian rhythm is n hours backward or forward from the normal circadian rhythm. If so, the user's body clock is the morning time zone and the body clock is the night time zone that is n hours backward or forward from the normal morning and night time zones. good too. For example, if the user's circadian rhythm is four hours behind the normal circadian rhythm, the body clock is 11:00 to 16:00 in the morning and 22:00 to 11:00 in the evening.

In addition, each of the above-described embodiments merely shows an example of specific implementation of the present invention, and the technical scope of the present invention should not be construed as being limited by this. Thus, the invention may be embodied in various forms without departing from its spirit or essential characteristics.

1, 1A, 1B Light irradiation control device 11 Information input unit 12 Circadian rhythm identification unit 13 Light irradiation

timing setting unit

14,

14A Recording unit

15, 15B Light irradiation control unit 16 Restriction period setting unit 17 Use restriction unit 18 Notification unit

Claims

a circadian rhythm identification unit that identifies the user's circadian rhythm based on information indicating the user's daily sleep time zone;
a light irradiation timing setting unit that sets light irradiation timing based on the circadian rhythm identified by the circadian rhythm identification unit;
a light irradiation control unit for controlling a light source to irradiate a display screen of the terminal with light having a predetermined intensity or more for a predetermined time when the light irradiation timing set by the light irradiation timing setting unit comes. A light irradiation control system characterized by:
The circadian rhythm identification unit further identifies the type of circadian rhythm sleep disorder based on the information indicating the user's daily sleep time zone,
According to the circadian rhythm identified by the circadian rhythm identification unit and the type of circadian rhythm sleep disorder, the light irradiation timing setting unit determines whether the body clock is in the morning or the body clock is in the evening. 2. The light irradiation control system according to claim 1, wherein the light irradiation timing is set to .
a restricted period setting unit that sets a usage restricted period of the terminal in a time period that does not include the light irradiation timing based on the circadian rhythm specified by the circadian rhythm specifying unit;
2. The light according to claim 1, further comprising a use restriction unit that controls to restrict use of the terminal during the use restriction period set by the restriction period setting unit. Irradiation control system.
Based on the circadian rhythm and the type of the circadian rhythm sleep disorder identified by the circadian rhythm identifying unit, a restricted period setting unit that sets a limited period of use of the terminal in a time zone that does not include the light irradiation timing. When,
3. The light according to claim 2, further comprising a use restriction unit that controls to restrict use of the terminal during the use restriction period set by the restriction period setting unit. Irradiation control system.
When the type of the circadian rhythm sleep disorder identified by the circadian rhythm identification unit is delayed sleep phase syndrome, the light irradiation timing setting unit sets the light irradiation timing in the morning time zone of the body clock, 5. The light irradiation control system according to claim 4, wherein the restricted period setting unit sets the restricted period of use to a night time zone based on a body clock.
When the type of the circadian rhythm sleep disorder identified by the circadian rhythm identification unit is advanced sleep phase syndrome, the light irradiation timing setting unit sets the light irradiation timing during the night time zone of the body clock, 5. The light irradiation control system according to claim 4, wherein the restricted period setting unit sets the restricted use period to a time zone in which the body clock is in the morning.
When the type of the circadian rhythm sleep disorder identified by the circadian rhythm identification unit is non-24-hour sleep-wake syndrome, the circadian rhythm of the user is set back from the normal state by a first predetermined time or more. The light irradiation timing setting unit sets the light irradiation timing in the night time zone of the body clock, and during the period when the user's circadian rhythm is not set back from the normal state by a second predetermined time or more (the above the second predetermined time is shorter than the first predetermined time), the light irradiation timing setting unit sets the light irradiation timing when the body clock is in the morning, and the limit period setting unit sets the body clock in the night time. 5. The light irradiation control system according to claim 4, wherein the usage restriction period is set in the band.
The terminal is a mobile terminal,
When the light irradiation timing set by the light irradiation timing setting unit is reached, notification is made by a means recognizable by the user regardless of whether the user is looking at the display screen of the portable terminal. further comprising the
5. The light irradiation control unit controls the light source so as to irradiate the display screen with light having a predetermined intensity or more after the notification is made by the notification unit. or 1 item|term light irradiation control system.
A light irradiation control device provided in a mobile terminal having a display that displays information by irradiating a display screen with light from a light source,
a recording unit for storing in a storage unit information indicating light irradiation timing set based on the circadian rhythm specified based on information indicating the user's daily sleep time zone;
a light irradiation control unit for controlling a light source to irradiate the display screen with light having a predetermined intensity or more when the light irradiation timing stored in the storage unit comes. Light irradiation control device.
a circadian rhythm identification unit that identifies the user's circadian rhythm based on information indicating the user's daily sleep time zone;
10. The light irradiation control device according to claim 9, further comprising a light irradiation timing setting unit that sets the light irradiation timing based on the circadian rhythm specified by the circadian rhythm specifying unit. .
The circadian rhythm identification unit further identifies the type of circadian rhythm sleep disorder based on the information indicating the user's daily sleep time zone,
According to the circadian rhythm identified by the circadian rhythm identification unit and the type of circadian rhythm sleep disorder, the light irradiation timing setting unit determines whether the body clock is in the morning or the body clock is in the evening. 11. The light irradiation control device according to claim 10, wherein the light irradiation timing is set to .
The recording unit causes the storage unit to further store information indicating a usage restriction period of the terminal, which is set to a time period that does not include the light irradiation timing based on the circadian rhythm of the user,
12. The method according to any one of claims 9 to 11, further comprising a usage restriction unit that controls usage of the terminal during the usage restriction period stored in the storage unit. The light irradiation control device according to 1.
a restricted period setting unit for setting a usage restricted period of the terminal to a time slot that does not include the light irradiation timing, based on the circadian rhythm specified based on the information indicating the daily sleep time slot of the user; 13. The light irradiation control device according to claim 12, further comprising:
A light irradiation control program implemented in a mobile terminal having a display that displays information by irradiating a display screen with light from a light source,
a recording means for storing, in a storage unit, information indicating light irradiation timing set based on a circadian rhythm specified based on information indicating a user's daily sleep time zone, and the above information stored in the storage unit A light irradiation control program for causing a computer to function as light irradiation control means for controlling a light source to irradiate the display screen with light having a predetermined intensity or more when the light irradiation timing comes.