JP2011200592A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which assists a sleeper to comfortably wake up at the closest-possible timing to a preset wake-up time without giving a sense of discomfort.SOLUTION: A lighting device 1 includes: a lighting part 2; an interface part 6; a controller 4 for controlling the output from the lighting part 2 which has been set in advance according to a preset wake-up time with regard to light adjustment schedule; a sensor part 8 for detecting a body movement of a sleeper to output a body movement detected count to the controller 4; and a clock part 7. The controller 4 has a shallow sleep determination part 41 which determines that a sleeper is in a shallow sleep condition when the body movement count outputted within a unit time given by a sensor part 8 is higher than a threshold value previously set. When the shallow sleep determination part 41 determines that the sleeper is in a shallow sleep condition anytime from the beginning of the light adjustment schedule to the end, the lighting part 2 stops increasing the output or decreases it. After that, the lighting part 2 starts increasing the output again when the shallow sleep determination part 41 determines that the shallow sleep period of the sleeper has passed over a prescribed period of time.

Description

  The present invention relates to an illuminating device for gradually increasing the output of awakening light to support a comfortable awakening of a sleeper.

  In modern daily life, wake-up using an alarm clock is the most common wake-up style, but since the depth of human sleep is constantly changing, it is urged to awaken by an alarm sound or the like The relationship between the timing and the depth of sleep of the user is not constant.

  At this time, it is known that if you wake up from a relatively deep sleep, you will be awakened abruptly, and you will wake up well, and if you wake up from a relatively shallow sleep, you will wake up well. Therefore, a wake-up device using illumination light has been disclosed in order to avoid a sudden wake-up from a relatively deep sleep (see, for example, Patent Document 1).

  In this wake-up device, by gradually generating light from a predetermined time before the set wake-up time, the user is awakened by an alarm sound or the like after prompting the user to fall asleep due to the awakening action of light. For this reason, it can be avoided that the user is suddenly awakened by an alarm sound or the like from deep sleep.

  However, in the wake-up device using light irradiation that gradually increases before waking up, the sleeper wakes up too early with respect to the wake-up setting time due to individual differences in sleep depth and light sensitivity before the wake-up setting time. Sometimes. Especially in modern society, people's sleep time has been shortened due to the shift to nighttime rhythms, and users may feel dissatisfied when such an early awakening occurs.

  And in order to solve such a subject, the apparatus using the feedback control method based on biometric information is devised for the purpose of waking up a user at the timing as close as possible to the wake-up setting time.

  For example, the sleep stage information is specified by the biological information before the start of the irradiation of gradually increasing light, and then the gradually increasing light irradiation pattern to be performed is determined based on the sleep stage information, and the light irradiation is performed so as to guide the user to awakening at the set-up time. An illumination device that performs the above is disclosed (for example, see Patent Document 2).

  Moreover, a certain period from the start of irradiation of gradually increasing light to the middle of irradiation or from before the gradually increasing light irradiation to the middle of irradiation is set as a sleep state determination period, and the depth of the sleep state is determined based on biological information in that period, and the subsequent sleep There is also disclosed a sleep support apparatus that determines a gradually increasing light irradiation pattern in a state adjustment period and performs light irradiation so as to guide the user to awakening at a wake-up setting time (see, for example, Patent Document 3).

Japanese Patent No. 3550784 JP 2008-86489 A Japanese Patent No. 4268863

  However, in any of the conventional lighting devices described above, the subsequent lighting control pattern is determined based on the biological information for a certain period. Therefore, after the determination of the lighting control pattern, the sleeper's unexpected reaction that occurs during light irradiation There is a problem that can not cope with.

  And since the behavior of sleep states of sleepers is very complex and unclear, it is virtually impossible to fully predict the sleep state, including the response to light, using biological information that can be measured with current technology. Impossible.

  Further, in the above-described conventional lighting device, even if the sleeper wakes up before the lighting dimming schedule is completed, it is difficult for the sleeper to go back to sleep for a while until the wake-up set time because the output of the lighting is gradually increased. There is also.

  The present invention has been made in view of the above problems, and is comfortable without causing discomfort to the sleeper at the timing as close as possible to the wake-up setting time, while corresponding to the sleep state of the sleeper that is constantly changing. An object of the present invention is to provide an illumination device that supports awakening.

  In order to achieve the above object, the present invention provides an illumination unit that emits awakening light that awakens a sleeper, an interface unit for inputting control conditions including a wake-up setting time, and an input through the interface unit. Control means for starting the output of the lighting unit from the lighting start time of the dimming schedule set in advance according to the set-up time, and gradually increasing the lighting output with time, and detecting the body movement of the sleeper to detect the body In a lighting device including a sensor unit that outputs the number of motion detections to the control unit, and a clock unit that measures time and transmits the time to the control unit, the control unit outputs sleep that is output within a unit time in the sensor unit. A sleep sleep determining means for determining that the sleeper is in a sleep state when the number of body movements detected by the person is greater than a predetermined threshold, and the control means opens the dimming schedule. If the sleeper determines that the sleeper is in a sleep state during the period from the start to the end, the increase in the output of the illumination unit is stopped or decreased, and then the sleep is determined in the sleep detection unit. The output of the illumination unit is gradually increased again when a period during which it is determined that the person is not in a sleep state has exceeded a predetermined period.

  In addition, when the control unit of the lighting device of the present invention has passed a predetermined time after the wake-up setting time, the control unit of the lighting unit starts from the time point without depending on the determination of the sleep detection unit. The output is gradually increased.

  The light sleep determination unit of the lighting device according to the present invention is characterized in that the threshold value at the start time of the dimming schedule is variable so as to be smaller than the threshold value at the completion time of the dimming schedule.

  The illuminating device according to the present invention determines the user's sleep state before the set-up time from the start of the dimming schedule, and if it is determined to be in the sleep state, gradually increases the light irradiation from the lighting unit. Stop or attenuate. In addition, after the gradual increase of the irradiation is stopped or attenuated, the illuminance is gradually increased again when the period for which it is determined that the patient is not in the sleep state continues for a predetermined period or longer. By this control, the lighting device according to the present invention can support comfortable awakening without giving discomfort to the sleeper at a timing as close as possible to the wake-up setting time.

The functional block diagram of the illuminating device which concerns on Embodiment 1 of this invention. (A) Arrangement block diagram of each part of the illumination device, (b) Arrangement configuration diagram of another example of the illumination device. (A) The figure which shows the operation example of the illumination device, (b) The figure which shows the example of the body movement detection signal in the illumination apparatus, (b) The figure which shows the example of the body movement detection signal in the illumination apparatus. The figure which shows the operation example in the illumination device. The flowchart which shows the operation | movement procedure of the illumination device. (A) The figure which shows the operation example in the illuminating device which concerns on the modification 1 of Embodiment 1, (b) The figure which shows the operation example in the same illuminating device. (A) The figure which shows the trigger generation operation example in the illuminating device which concerns on the modification 2 of Embodiment 1, (b) The figure which shows the trigger generation operation example in the same illuminating device. The figure which shows the operation example in the illuminating device which concerns on Embodiment 2 of this invention. The figure which shows the operation example in the illuminating device which concerns on Embodiment 3 of this invention.

  Hereinafter, lighting devices according to embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the illumination device 1 according to the first embodiment includes an illumination unit 2 that emits awakening light that awakens a sleeper, a sound source unit 3 that rings, an output of the illumination unit 2, and a sound source unit 3. A control unit 4 for controlling the ringing of the sound, a calculation unit 5 for calculating the lighting start time and the dimming schedule, an interface unit 6 for the user to make various settings such as a wake-up setting time, and a clock unit for measuring time 7 and a sensor unit 8 for detecting the body movement of the sleeper.

  The illuminating unit 2 gradually increases the wake-up light toward the wake-up set time under the control of the control unit 4 and outputs any light source such as an incandescent bulb or LED. Is provided.

  The sound source unit 3 is a sound source that emits an alarm sound that prompts the user to wake up at the wake-up set time under the control of the control unit 4, and is, for example, a buzzer or a speaker.

  The control unit 4 controls the illumination unit 2 and the sound source unit 3 based on a control signal from the calculation unit 5. Moreover, the sleep sleep determination part 41 which determines a sleep sleep based on the control program using information, such as the frequency | count of a sleeper's body movement and the wake-up setting time which the sensor part 8 detected is provided. Then, according to the control program, the control unit 4 starts illumination of the illumination unit 2 according to the dimming schedule set in the interface unit 6 before the wake-up setting time, and gradually increases the illumination output with time to reach the wake-up set time. Illumination is performed by a gradual increase pattern that maximizes the illumination output, and the sleeper is awakened.

  In addition, when the controller 4 of the lighting device 1 according to the first embodiment determines that the sleeper is in the sleep state in the sleep detection unit 41 based on the body motion detection signal from the sensor unit 8, When it is determined that the sleep state has been removed, the lighting control is performed by changing the gradual increase pattern.

  The calculation unit 5 considers the wake-up time set by the interface unit 6, the current time information from the clock unit 7, and the user's body movement information from the sensor unit 8, and sends control signals for the light source and the sound source to the control unit 4. Send to.

  The interface unit 6 is used to set the wake-up time, set the time to start lighting earlier than the wake-up time, turn on / off the alarm sound, adjust the lighting output, etc. It has a display unit such as a liquid crystal for displaying time and the like. The clock unit 7 keeps the current time, and the arithmetic unit 5 refers to the time.

  The sensor unit 8 is a sensor for detecting a user's sleep state by measuring body movement, and in particular, detects the number of body movements of a sleeper. This body movement is detected by a piezoelectric sensor (various pressure sensors) installed on or under the bedding, an acceleration sensor worn by the user on the body such as an arm, a non-contact infrared sensor using the bedding as a detection area, etc. Such a sensor can be used.

  Further, the sensor unit 8 outputs a body movement detection signal to the control unit 4 side, and the sleep mode determination unit 41 of the control unit 4 has a unit motion detection frequency within a unit time that satisfies a predetermined sleep mode determination criterion. When the threshold value is exceeded, it is determined that the sleeper is in a sleep state.

  Next, the determination of the sleeper's sleep state will be described. Conventionally, there are several means for grasping a person's sleep state. For example, the most reliable means used in the medical field is overnight polysomnography (PSG), which sleeps from biological information such as brain waves, heart rate, electrooculogram, myoelectric potential, and respiration. Determine depth (sleep stage). This method has been established for a very long time, has been put into practical use in the medical field, and has the advantage of being accurate, but it requires the acquisition of a large amount of biological information, so the measurement system is complicated and expensive. There is a problem. In addition, the electroencephalogram is difficult to measure in a non-contact manner (no electrode) with the current technology, and it is unrealistic in that the user must wear an electrode and fall asleep.

  Due to these problems, recently, a technique for determining the sleep depth from heartbeats and pulse waves and a technique for estimating sleep / wakefulness by body movement have been developed. The latter is also used as a recording means for sleep / wakefulness rhythm in the medical field. It is practically used.

  It is well known that in human sleep, body movement due to turning over is generally reduced during deep sleep, and body movement is likely to occur during shallow sleep. Therefore, the lighting device 1 according to the present invention detects the number of body movements within a unit time of a sleeper using the sensor unit 8 such as an infrared sensor, which is the simplest method, and sleeps based on the number of body movement detections. It detects the person's sleep state.

  FIG. 2A shows an arrangement configuration of each part of the lighting device 1. The illuminating device 1 includes each unit such as the illuminating unit 2 and the sound source unit 3 in a housing, and the illuminating device 1 is installed and used at a user's bedside.

  The user sets the wake-up time at the interface unit 6 of the lighting device 1 and goes to sleep before going to bed. And the illuminating device 1 light-emits the illumination apparatus 1 at the irradiation start time of the increase awakening light based on the preset light control schedule, and increases the light output gradually. At this time, the illumination unit 2 is arranged to supply light to the head of the sleeping user.

  Next, in the lighting device 1, when the gradually increasing light irradiation is started any time before the set-up time, in this example, the sensor unit 8 is gradually increased based on the result of the number of body motion detections by the infrared body motion sensor. Change the light output pattern. Here, the infrared body motion sensor detects that infrared rays emitted from the human body change due to body motion, and as shown in FIG. 2, the detection area covers the body motion range of a sleeping user. Thus, the entire bedding is set as the detection region from the head of the sleeper. Further, it is desirable that a movable mechanism or the like is provided in the sensor unit 8 so that the user can adjust the body motion detection area. When the wake-up setting time is reached, an alarm sound is generated from the sound source unit 3 to prompt the user to wake up.

  FIG. 2B shows another configuration example of the lighting device 1. In this example, the illumination unit 2 is provided on the ceiling. The illumination device 1 including the infrared body motion sensor functions as a remote controller for the illumination unit 2, and lighting control is performed by a wireless or wired control signal from the illumination device 1. In this case, since the entire room is illuminated from the ceiling, the awakening light can be gradually increased to a state close to natural dawn. In the lighting device 1, the sound source unit 3 (speaker) may also be configured independently.

  Next, the operation of the illumination device 1 according to the present invention will be described with reference to FIGS. As illustrated in the initial setting pattern 31 of FIG. 3A, the lighting device 1 sets the wake-up time before going to bed and goes to sleep, based on the initial setting pattern 31 that is a normal dimming schedule, for example, 30 The lighting output is gradually increased from a minute ago. When the user does not wake up until the wake-up set time, the user is woken up from shallow sleep by an alarm sound from the sound source unit 3 at the wake-up set time based on the initial setting pattern 31, thereby prompting comfortable and natural wake-up.

  On the other hand, when the user's sleep becomes too shallow due to gradually increasing light irradiation, body movement such as turning over tends to occur. The sleep detection unit 41 determines the sleep state based on the number of body movements within a unit time, and if it is determined that the sleeper is in the sleep state, the illuminance increases so as not to increase the awakening action by light. To stop. Thereafter, when it is confirmed that the body movement has disappeared and no body movement has been detected for an arbitrary time, the control unit 4 has reduced the possibility of an early awakening with respect to the set-up time (excessive shallowness). It is determined that sleep has been avoided), and the output from the illumination unit 2 is gradually increased again as shown in the lighting history (32).

  Next, with reference to FIG. 3, description will be given more specifically when the sleep detection unit 41 performs sleep detection based on the body movement measurement of the sensor unit 8.

  FIG. 3B shows an example of an electrical signal (waveform) that is output when the infrared body motion sensor detects the body motion as the sensor unit 8. Here, when detecting the body movement, the sensor unit 8 outputs a rectangular wave as shown in FIG. 3B, and the more continuous body movements, the more rectangular waves are output continuously. The

  In this case, as the sleep is shallower as described above, the body shows more movements. Therefore, the sleep sleep determination unit 41 is based on the output of the sensor unit 8 as shown in FIG. Based on the frequency of body movement, that is, the frequency of appearance of rectangular waves, it is possible to estimate whether or not an excessive sleep state has occurred. That is, the hibernation determination unit 41 sets a threshold value T (H) for the number of body movements per unit time (rectangular wave number) X, and determines that it is in a sleep state when X exceeds the threshold value T (H). be able to. As a result, the trigger Hold (33) is generated, and the increase in illuminance is temporarily stopped as shown in the lighting history (32).

  Thereafter, when the sleeper transitions from the sleep state to the deep sleep state, the body movement disappears. At this time, if the escape from the sleep state is certain, as shown in FIG. For this reason, the sleep detection unit 41 sets the threshold value T (R) to the non-body motion continuation time Y, which is the time during which body motion undetected continues after the last body motion detected by the sensor unit 8 is detected. If the threshold value T (R) is set, it is determined that the sleep state has been removed. Then, the trigger Recover (34) is generated, and the illuminance starts to rise again toward the target output at the wake-up setting time as shown in the lighting history 32 of FIG.

For this reason, in the case of FIG. 3 (a), when the lighting device 1 detects a sleep due to body movement during irradiation with gradually increasing light, it is possible to stop an increase in illuminance and avoid early awakening at the set-up time. It becomes.

  Note that the illuminance may be temporarily reduced from the time point (33) when it is determined that the patient is in a sleep state as in the lighting history (41) shown in FIG. Even in this case, when it is confirmed that the body motion disappears and the body motion is not detected for any time (42), the possibility of early awakening at the set-up time is reduced (excessive) It is determined that sleep has been avoided), and the output is increased again as shown in the lighting history (41). For this reason, in the case of FIG. 4, when the lighting device 1 detects a sleep due to body movement during the irradiation of gradually increasing light, it is possible to attenuate an increase in illuminance and avoid early awakening at the set-up time.

  Next, the operation of the lighting device 1 according to the first embodiment will be described with reference to FIG. 5. First, the lighting device 1 outputs a lighting output from a predetermined time before the set-up time based on the dimming schedule. Increase gradually (S1). The sensor unit 8 continuously detects the number of body movements of the user, and when the number of body movements of the user per unit time exceeds the threshold (Yes in S2), the sleep detection unit 41 Determines that the user is in a sleep state, and the control unit 4 stops the gradual increase in illuminance so as not to increase the awakening effect of light (S3).

  And the control part 4 determines whether the fixed time passed after the body movement detected by the sensor part 8 disappeared, and when the fixed time has passed (Yes in S4), the wake-up set time Then, the illuminance of the illumination unit 2 is increased again so that the illuminance becomes maximum (S5).

  As described above, in the lighting device 1, when the user sets a desired wake-up time by going to the time display on the clock unit 7 and the button operation on the interface unit 6 before going to bed, the user can arbitrarily set the wake-up time from the set wake-up time. Before this time, the gradual light irradiation is performed by the control unit 4 and the illumination unit 2.

  And when the gradually increasing light irradiation from the illumination unit 2 reaches a predetermined maximum output and the alarm is reproduced, the user wakes up, but there is no problem, but after the start of the gradually increasing light irradiation, before the wake-up set time When the user wakes up, the user may be dissatisfied with having woken up earlier than the set-up time.

  For this reason, in the lighting device 1 of the present invention, the sleep state of the user is measured using the sensor unit 8, and when light sleep is detected, the gradual increase of the light output is stopped or attenuated for a certain period of time so that the light awakening action is achieved. Weaken. Therefore, in the illuminating device 1, dissatisfaction by a user's early awakening can be reduced by preventing the sleeper from completely awakening in an early time zone with respect to the wake-up setting time. Further, when the user wakes up early, the gradual increase of the illumination light is stopped or attenuated, so that the user can sleep for a while until the wake-up setting time.

(Modification 1 of Embodiment 1)
A first modification of the first embodiment will be described with reference to FIG. In the example of the first embodiment described above, the number of times of stopping or reducing the increase in illumination is one. However, in the lighting device according to the first modification, as shown in the lighting histories (61) and (62) in FIG. 6, when the sleep again is detected again due to the occurrence of the body movement after rising again, It stops or reduces the increase in illuminance.

  That is, in the lighting device of the first modification, by repeating the detection of the light sleep due to body movement until the wake-up set time or just before the wake-up set time, it becomes difficult for the user to awaken early with respect to the wake-up set time.

  In addition, when the sleep is detected immediately before the wake-up setting time, the increase in illuminance may be stopped at the time when the wake-up setting time is reached, but as shown in the lighting history (61) of FIG. In addition, the alarm is reproduced at the wake-up time and the illuminance is increased instantaneously, or the illuminance is gradually increased from the wake-up time as shown in the lighting history (62) in FIG. Awakening support may be provided.

(Modification 2 of Embodiment 1)
A second modification of the first embodiment will be described with reference to FIG. As shown in FIG. 7A, the sleep-sleep determination unit 41 of the lighting device according to the second modification detects body movements of a sleeper in a period equal to or greater than a threshold T (R) after the trigger H (71) is generated. If not, trigger R (72) is generated. At this time, as shown in FIG. 7B, if the body movement occurs after the trigger H (73) occurs until the trigger R (74) occurs, it is determined that the sleeper has a stronger awakening tendency. The threshold value T (R) ′ is set longer than the threshold value T (R).

  That is, in the second modification, in the case of FIG. 7 (b) as compared to FIG. 7 (a), the body movement is generated even after the trigger H (73) is generated, so that the threshold value T (R) <the threshold value T ( R) ′, the threshold is reset. For example, the threshold value T (R) can be set longer as the number of body movements after the trigger H is generated.

  Thereby, in the illuminating device which concerns on this modification 2, as it is judged that the sleeper's awakening tendency is strong, illumination increase is suppressed for a longer time, and early awakening prevention can be implement | achieved accurately.

(Embodiment 2)
Hereinafter, a second embodiment of the illumination device according to the present invention will be described with reference to FIG. Note that the functional configuration of the illumination apparatus according to the second embodiment is the same as that of the first embodiment, and thus detailed description thereof is omitted.

  In the lighting device 1 according to Embodiment 1 described above, if the control unit 4 repeats the illuminance increase stop and re-rise due to the detection of sleep as low as the wake-up setting time, the maximum illuminance may not be reached near the wake-up setting time. In this case, there may be a case where the awakening effect by light in the vicinity at the set-up time becomes relatively small and the smooth awakening is not achieved.

  Therefore, in the lighting apparatus according to Embodiment 2, as shown in the lighting history (81) in FIG. 8, for example, from a predetermined time (82) before the wake-up set time, such as 15 minutes before, to the wake-up set time, Regardless of the determination result of the determination unit 41 or the sensor unit 8 does not detect body movement, the output is gradually increased so that the output from the illumination unit 2 becomes the target output at the set-up time. Thereby, in the illuminating device which concerns on this Embodiment 2, it can wake up reliably, without giving discomfort to a sleeper at the wake-up setting time.

(Embodiment 3)
Hereinafter, a third embodiment of the lighting device according to the present invention will be described with reference to FIG. Since the functional configuration of the lighting apparatus according to the third embodiment is the same as that of the first embodiment, detailed description thereof is omitted.

  Normally, when a lighting device is used for awakening support, the problem that the user is awakened early with respect to the wake-up set time becomes more serious as the wake-up is earlier with respect to the wake-up set time. On the other hand, in the vicinity of the set-up time, it is desirable that the illumination output be as high as possible in order to promote reliable awakening.

  Considering the above, in the lighting apparatus according to the third embodiment, the closer to the disclosure timing of the dimming schedule, the easier it is to make a determination of “sleeping state” (that is, it is determined that the body is in a sleeping state even with a slight body movement). ) As the wake-up time is approached, the determination “sleeping state” is less likely to occur (that is, it is not determined that the patient is in a sleeping state unless there is more body movement).

  Specifically, as shown in FIGS. 9B and 9C, the trigger H (12) is generated closer to the time when the dimming schedule is started, that is, earlier in the time zone with respect to the wake-up setting time. The threshold value T (H) for generating the trigger R (13) is set large while the threshold value T (H) is set small. As a result, in a time zone earlier than the set-up time when the user is dissatisfied with early awakening, the illuminance increase can be stopped even with a slight body movement, and arousal prevention can be achieved with higher sensitivity.

  On the other hand, as shown in FIGS. 9D and 9E, in the time zone closer to the set-up time, the threshold value T (H) ′ for generating the trigger H (14) is increased and the trigger R (15) is generated. The threshold value T (R) ′ to be set is set small.

  As described above, in the lighting device according to Embodiment 3, the control unit 4 uses the threshold of the number of times of body motion detection at the start of the dimming schedule in the light sleep determination unit 41 as the body at the completion of the dimming schedule. It was made variable so as to be smaller than the threshold of the number of times of motion detection. For this reason, in a time zone closer to the set-up time, it is possible to prioritize awakening due to an increase in illuminance without stopping the gradual increase of the illumination unit 2 unless there is a relatively large number of body movements.

  Therefore, the present lighting device can reduce the user's wake-up risk at a timing that is too early with respect to the wake-up setting time, and has high illuminance near the wake-up setting time, thereby realizing reliable waking support for the sleeper. .

  In addition, this invention is not restricted to the structure of the said embodiment, A various deformation | transformation is possible in the range which does not change the meaning of invention. Moreover, it can also be set as the illumination method which uses the characteristic structure means of the illuminating device of this invention as a step, or a program including all those steps.

DESCRIPTION OF SYMBOLS 1 Illumination device 2 Illumination part 3 Sound source part 4 Control part 41 Sleep sleep determination part 5 Calculation part 6 Interface part 7 Clock part 8 Sensor part

Claims (3)

An illumination unit that emits wake-up light that awakens a sleeper, an interface unit for inputting control conditions including a wake-up setting time, and a control that is set in advance according to the wake-up setting time input through the interface unit. Control means for starting the output of the illumination unit from the illumination start time of the light schedule and gradually increasing the illumination output with time, and a sensor for detecting the body movement of the sleeper and outputting the number of body movement detections to the control means In a lighting device comprising a unit and a clock unit that measures time and transmits the time to the control means,
The control unit includes a sleep detection unit that determines that the sleeper is in a sleep state when the number of body movement detections of the sleeper output within a unit time in the sensor unit is greater than a predetermined threshold. Have
If the sleep determining unit determines that the sleeper is in a sleep state between the start and completion of the dimming schedule, the control unit stops or decreases the gradual increase in the output of the illumination unit. Then, the output of the illuminating unit is gradually increased again when a period during which the sleeper is determined not to be in the sleep state is more than a predetermined period after the sleep detection unit.   The control means is configured to gradually increase the output of the illumination unit from the time point when a predetermined time has passed from a wake-up setting time, regardless of the determination of the sleep detection means. The lighting device according to claim 1.   The said light sleep determination means made variable the said threshold value in the time of the start of a light control schedule so that it might become smaller than the threshold value in the time of completion of a light control schedule. Lighting device.

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