JP2008086489A - Illuminator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional rising apparatus is incomplete as an apparatus for increasing an awakening degree when rising since light control matched with a sleep state is not taken into consideration at all, a light quantity lacks and full awakening is impossible in the case of being in a deep sleep state at the illumination start time for instance, and there is the risk of awakening before the set time in the case of being in a light sleep state inversely. <P>SOLUTION: If the illuminator is used, by adjusting the lighting time of an illumination and a light control degree at each lighting time matched with a sleep stage, the difference of the awakening degree when rising due to an individual difference and the sleep state is suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illuminating device that promotes an arousal level at a wake-up time set by illumination corresponding to a human sleep stage.

2. Description of the Related Art A lighting device that promotes awakening level is known as a device that promotes awakening level when waking up by dimming control of lighting for a user who sleeps in accordance with the rising time. For example, there has been proposed a lighting device that promotes the arousal level by gradually increasing the amount of light in accordance with a set wake-up time (see, for example, Patent Document 1).
JP 2003-215279 A

  However, in the conventional wake-up lighting device, no consideration is given to the lighting control in accordance with the sleep state. For example, in the case of a deep sleep state at the lighting start time, the light amount is insufficient, so that it is sufficiently awakened. In contrast, if the sleep state is shallow, there is a fear of waking up before the set wake-up time, which is insufficient as a device that promotes the wake-up level when waking up .

  This invention is made in view of the said subject, and provides the illuminating device which suppressed the difference in the arousal level at the time of getting up by an individual difference or a sleep state by performing the illumination corresponding to a person's sleep stage.

  The lighting device according to claim 1 is set by the time counting unit corresponding to the sleep stage determined by the time measuring unit capable of setting the wake-up time, the determination unit for determining the sleep stage of the user, and the determination unit. A lighting unit that determines a lighting schedule before the wake-up time and a light amount for each time in the lighting schedule; lighting that can be dimmed according to the lighting time determined by the arithmetic unit and the light amount for each time within the lighting time And a control unit.

  The technical meanings of the terms used in the present invention are as follows.

  The control target of the lighting device of the present invention may be main lighting in a room or lighting that is irradiated in a spot manner. However, it is necessary to install it so that light can be reliably irradiated to the user regardless of the illumination. Further, the light source to be controlled may be provided separately from the lighting device or may be provided integrally. Furthermore, the light source may be a dimmable light source such as an LED or an incandescent bulb or a fluorescent lamp.

  The sleep stage in the present invention is an index indicating the depth of a user's sleep state, and is obtained by detecting biological information and extracting and analyzing its feature points.

  The sleep stage of the present invention can be determined by measuring brain waves, eye movements, electromyograms, pulse waves, and the like.

  In the measurement of the pulse wave, the activities of the sympathetic nerve and the parasympathetic nerve can be understood, and if the parasympathetic nerve is dominant, it can be determined as non-REM sleep, and if the sympathetic nerve is dominant, it can be determined as REM sleep.

  The calculation unit of the present invention determines the lighting time of the illumination and the amount of light for each time within the lighting time in consideration of the wake-up time based on the determination of the sleep stage during the sleeping time.

  Moreover, you may provide in this calculating part the function which estimates the sleep stage in the wake-up time by referring the past sleep information history.

  In general, a human sleep cycle is 90 to 120 minutes as one cycle, and deep sleep and shallow sleep are repeated. For this reason, if the information regarding the sleep stage before the wake-up time is collected in real time, the sleep cycle can be predicted and the sleep stage at the wake-up time can be predicted. In addition, the sleep stage information in real time may be measured over, for example, several days and accumulated as a user database, and used as prediction determination information.

  The dimming control unit of the present invention is lighting-controlled according to the lighting time and the dimming degree determined by the calculation unit.

  The illumination device according to claim 2 is characterized in that the sleep stage is determined by measuring a pulse wave.

  The illumination device according to claim 3 is characterized in that the sleep stage is determined to be 1 to 4 by measuring an electroencephalogram, an eye movement, and an electromyogram.

  The sleep stage is generally classified into four stages by analyzing features appearing in the electroencephalogram, eye movement, and electromyogram.

  The illumination device according to claim 4 is characterized in that the integrated value of the light amount for each lighting time and time in the schedule increases as the sleep stage is changed from 1 to 4.

  The illumination device according to claim 5 is characterized in that the main light source of the illumination is an LED.

  According to the illuminating device of claim 1, by adjusting the lighting duration of lighting and the dimming degree for each lighting time according to the sleep stage, it is possible to suppress the difference in the arousal level when waking up due to individual differences or sleep states. it can.

  According to the illumination device of claim 2, since the pulse wave is measured, the measurement unit of the sleep stage can be miniaturized, and it is difficult to disturb sleep.

  According to the illuminating device of claim 3, as the sleep state becomes deeper, the integrated value of the amount of light to be irradiated can be increased to prevent awakening before the wake-up time.

  According to the illumination device of the fourth aspect, the sleep stage can be reliably measured in order to measure the electroencephalogram, eye movement, and electromyogram.

  According to the illuminating device of the fifth aspect, by using the main light source as the LED, fine dimming can be performed, and minute dimming change adapted to the sleep stage can be performed.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a block diagram showing an illumination apparatus according to an embodiment of the present invention.

  As shown in FIG. 1, this lighting device is capable of transmitting and receiving information by wireless communication with a clock unit 1 that can set a wake-up time, a pulse wave measuring device 2a that can be worn on the user's hand, and a pulse wave measuring device 2a. The main body 2b is configured to determine the sleep stage, the lighting time and the lighting time based on the time information such as the current time from the timekeeping unit 1 and the set wake-up time and the determination result from the determination unit 2. A calculation unit 3 that determines the dimming degree for each time, a lighting control unit 4 that is lit according to information from the calculation unit 3, a lighting fixture 5 that is controlled by the lighting control unit 4 and whose main light source is an LED, and an alarm function 6 ing.

  As shown in FIGS. 2 and 3, in FIG. 1, the timing unit 1, the determination unit 2, and the calculation unit 3 may be configured as the sleep stage measurement device 10, and the sleep stage measurement device is configured by the timing unit 1 and the determination unit 2. 10 and the calculation unit 3 and the lighting control unit 4 may be installed in the lighting fixture 5. The alarm function 6 may be provided in the sleep stage measuring apparatus 10 or the lighting fixture 5, and may be a signal transmission function or an alarm sound for turning on a device such as a television or an audio at a wake-up time.

  Next, the determination method of the sleep stage by the determination unit 2 and the calculation method by the calculation unit 3 will be described.

  First, the state of the sympathetic nerve and the parasympathetic nerve can be grasped by measuring the pulse wave during sleep and analyzing the frequency of the fluctuation. In this frequency analysis, peaks are formed on the low frequency side and the high frequency side, respectively, reflecting the activities of the sympathetic nerve and the parasympathetic nerve. The relative value of this peak shows which autonomic nerve is active. Since this autonomic nerve reflects the activity of the brain stem that controls cerebral rest, it can indirectly know the resting state of the cerebrum. For example, if the sympathetic nerve is dominant as a result of the measurement, it is determined that the state is close to wakefulness due to REM sleep. Conversely, if parasympathetic nerve is dominant, it will be non-REM sleep and it will be determined that it is a deep sleep state.

  The result determined by the determination unit 2 is transmitted to the calculation unit 3, and the lighting control condition is calculated.

  4A, 4B, and 4C are dimming degree schedules for each sleep stage calculated by the calculation unit 3 at a time before a predetermined time from a certain wake-up time. As for these dimming schedules, an optimal form is selected depending on the wake-up time, the sleep stage a predetermined time before the wake-up time, and the like.

 FIG. 4A shows the brightness at the start of lighting changed for each sleep stage.

FIG.4 (b) changes the lighting start time for every sleep stage. FIG.4 (c) changes the inclination of the brightness from the lighting start for every sleep stage.

  The sleep stage determination time is preferably shorter than one sleep cycle with respect to the set wake-up time. For example, when the sleep cycle is 90 minutes and one cycle, the time is shorter than 90 minutes with respect to the wake-up time. In addition, if the determination time is too close to the wake-up time, a strong light irradiation may be required abruptly. Therefore, it is desirable that the determination be made at least 10 minutes before 30 minutes before.

  Moreover, you may provide the function which can estimate the sleep stage in the rising time by referring the past sleep information log | history in this calculating part. In this case, the dimming degree schedule can be determined more accurately. Further, the sleep stage may be determined in real time and fed back to the dimming degree schedule.

  FIG. 5 shows an example in which changes in the sleep stage during sleep are measured for each time. For example, 6:30 can be determined as the sleep stage 2. Thus, human sleep repeats a sleep cycle in which a deep sleep state and a shallow sleep state are one cycle. One cycle in FIG. 5 is about 70 minutes.

  Next, a second embodiment of the present invention will be described. In the second embodiment, the determination unit 2 measures brain waves, eye movements, and electromyograms, and classifies sleep stages into 1-4.

  The definition of the sleep stages 1 to 4 will be described with reference to FIG.

(Sleep stage 1)

The brain wave has an α wave of 50% or less, and a θ wave and a vertex sharp wave (vertex sharp wave) appear. The cranial apex-overwave is a two-layer or three-layer wave with the largest negative phase amplitude, and appears most predominantly on the top and center of both sides. It is also called a hump because of the shape of the wave. Further, at this stage, slow eye movements (SEMs) are observed, and the amplitude of the muscular electromyogram is lower than that at awakening.

(Sleep stage 2)

A sleep spindle, a spindle, and a K complex appear in the electroencephalogram. The δ wave also appears as the sleep becomes deeper, but the δ wave of 75 μV or more at 2 Hz or less is 20% or less of the determination section. The spindle wave is defined as 12 to 14 Hz in the manual (Rechtschaffen et al., 1968) and is defined as a duration of 0.5 seconds or longer. However, a wave of 12 to 16 Hz may be included (Sleep Society Automatic Sleep Stage Judgment Subcommittee) 1996). The K complex is composed of a slow component resembling a cranial apex-overwave and a fast component consisting of spindle waves.

(Sleep stage 3)

A δ wave of 2 Hz or less and 75 μV or more occupies 20 to 50% of the determination section.

(Sleep stage 4)

A δ wave of 2 Hz or less and 75 μV or more occupies 50% or more of the determination section.

  In the second embodiment according to the present invention, the sleep stage is determined according to the classification method. Since the operation after the determination is the same as that of the first embodiment, detailed description thereof is omitted.

It is a block diagram which shows the illuminating device of embodiment of this invention. It is a block diagram which shows the illuminating device of embodiment of this invention. It is a block diagram which shows the illuminating device of embodiment of this invention. It is a figure which shows the dimming degree schedule for every sleep stage of embodiment of this invention. It is the figure which showed an example which measured the change of the sleep stage during sleep for every time. It is explanatory drawing which shows the brain wave, eye movement, and electromyogram of sleep stages 1-4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Timekeeping part 2 Judgment part 3 Calculation part 4 Lighting control part 5 Lighting fixture

Claims (5)

A timekeeping unit that can set the wake-up time;
A determination unit for determining the sleep stage of the user;
Corresponding to the sleep stage determined by the determination unit, a lighting unit for lighting before the wake-up time set by the time measuring unit, and a calculation unit for determining the amount of light at each time in the lighting schedule;
An illumination control unit capable of dimming according to the lighting time determined by the calculation unit and the amount of light at each time within the lighting time;
An illumination device comprising:   The lighting device according to claim 1, wherein the determination unit determines a sleep stage by measuring a pulse wave.   The lighting device according to claim 1, wherein the determination unit determines a sleep stage from 1 to 4 by measuring brain waves, eye movements, and electromyograms.   The lighting device according to claim 2 or 4, wherein the integrated value of the lighting time in the schedule and the amount of light for each time increases as the sleep stage is changed from 1 to 4.   The illumination device according to claim 1, wherein a main light source of the illumination is an LED.

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