JP2000294387A - Lighting control method and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the optimum lighting environment corresponding to the biological rhythm of man by automatically controlling at least a part of operation so that the lighting including much low color temperature light is provided in the tranquilized period of the biological rhythm of man, and the lighting including much high color temperature light is provided in the activated period of the biological rhythm of man. SOLUTION: For example, a ceiling light L1 consists of the first and second two straight fluorescent tubes 1, 2. The first fluorescent tube is a fluorescent lamp of bulk color (color temperature 3000K) and the second fluorescent tube 2 is a fluorescent lamp of daylight color (color temperature 6500K). The fluorescent tubes 1, 2 are respectively connected to a control part C10. The control part 10c includes a timer, is provided with a switch, and automatically executes the lighting on and off operation of the fluorescent tubes 1, 2 at a predetermined time, and this operation can be also manually executed. Whereby, for example, the second fluorescent tube is automatically lighted at rising, and manually lighted out at sleeping and about noon, so that the intensity of illumination of daylight is provided from a time about noon to a time before the sunset.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control method for performing proper illumination according to a human biological rhythm, and a system for performing appropriate illumination according to a human biological rhythm.

[0002]

2. Description of the Related Art The light environment has a great effect on the psychological and physiological aspects of human beings, and proper design of this light environment is a fundamental element in obtaining a healthy and comfortable living environment. One of them.

However, in actual lighting plans, it is difficult to say that the effects of light on the psychological and physiological aspects of human beings are sufficiently considered. As guidelines for lighting plans, JIS lighting standards (JIS-Z-911
0) and the Japan Institute of Illumination's standards for housing lighting, but these are standards for safety and visibility that ensure visibility in basic living activities and visual tasks.

Some of the lighting standards of the Japan Institute of Illumination deal with the pleasantness of the atmosphere that creates pleasure and enjoyment, and some attempts to consider the comfort of the light environment have been made. It has been done. However, few studies have considered lighting from a physiological point of view.

[0005] By the way, a typical one of autonomous intrinsic rhythms (biological rhythms) exhibited by a living body is about 2
There is a circadian rhythm with a 4-hour cycle. For example, human core body temperature is usually lowest at midnight and highest from day to evening, with an amplitude of usually about 1 ° C., and the secretion of melatonin hormone, which is strongly associated with this temperature behavior, is most pronounced at midnight, It shows a circadian rhythm with very little daytime. A sufficient drop in body temperature at night leads to a deep sleep (feeling)
Melatonin hormones are also known to affect the immune system.

[0006] The above rhythm is controlled by a "clock" which is assumed to be in the brain (in the case of humans, the suprachiasmatic nucleus), and the original cycle of about 25 hours is controlled by the brightness of light and darkness. Adjusted to 24 hours based on social factors.

[0007]

In order to lead a healthy and comfortable life, it is important that the phase of the biological rhythm possessed by a human coincides with the temporal flow of the surrounding environment and that the amplitude be further secured. It is said to be. Therefore, even in the lighting plan, it matches the phase of human biological rhythm,
Furthermore, it is considered desirable to design the light environment so that a large amplitude is secured.

The present invention has been made in view of the above points, and an object of the present invention is to provide a lighting control method and a lighting system capable of obtaining a proper light environment according to a human biological rhythm. To provide.

[0009]

According to a first aspect of the present invention, there is provided a lighting control method for controlling lighting in accordance with a human biological rhythm. At least a part of the operation is automatically performed so that the calming period of the biological rhythm of the human illuminator includes illumination containing a large amount of low color temperature light and the activation period of the human rhythm of the human rhythm includes illumination containing a large amount of high color temperature light. It is characterized in that it is controlled dynamically.

The lighting control method according to a second aspect of the present invention is the lighting control method according to the first aspect, wherein the light emission level is low during the calming period and high during the activation period. It is characterized in that the illumination is controlled so as to have a light emission level.

According to a third aspect of the present invention, in the illumination control method according to the first or second aspect, the illumination is controlled in accordance with time.

According to a fourth aspect of the present invention, in the illumination control method according to the first to third aspects, the illumination control is performed in accordance with daytime and nighttime fluctuations in brightness outdoors. It is assumed that.

According to a fifth aspect of the present invention, there is provided a lighting system for illuminating according to a human biological rhythm, comprising: a lighting device arranged to adjust a color temperature; A control unit capable of automatically controlling at least a part of the operation so that the lighting apparatus is turned on at a low color temperature during a calming period in a rhythm and the lighting apparatus is turned on at a high color temperature during an activation period. It is characterized by having.

In the lighting system according to a sixth aspect of the present invention, in the lighting system according to the fifth aspect, the control unit causes the lighting apparatus to emit light at a low light emission level during a period of calming in a human biological rhythm. The lighting device can be controlled to be turned on at a high light emission level during the activation period.

The lighting system according to a seventh aspect of the present invention is the lighting system according to the fifth or sixth aspect, further comprising a timer for performing the operation of the control unit according to time. It is a feature.

According to an eighth aspect of the present invention, in the illumination system according to any one of the fifth to seventh aspects, the operation of the control unit is performed according to day-night fluctuations in brightness outdoors. Is provided.

In the present invention, the term “calming phase in the human biological rhythm” substantially corresponds to a period in the human circadian rhythm in which the core body temperature of the human decreases and the secretion of melatonin increases. The “activation phase in the human biological rhythm” substantially corresponds to a period in which the core body temperature of the human increases and the secretion of melatonin decreases.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of the present invention will be exemplified and specifically described. As shown in FIG. 1, the lighting control method according to the present embodiment employs illumination including a large amount of low color temperature light in a calming period (hereinafter, simply referred to as a calming period) P1 in a human biological rhythm. Part of the operation is automatically controlled by the control unit C10 shown in FIG. 2 so that an activation period (hereinafter, simply referred to as an activation period) P2 in the biological rhythm of the human body rhythm is illumination including a large amount of high color temperature light. Is what you do. In FIG. 1, ○ and × indicate ON and OFF, respectively, and a and m indicate automatic operation and manual operation, respectively.

In the method exemplified here, in one room in a house, the lighting time zone at night, that is, the time zone from t1 before sunset to the bedtime t2 shown in FIG. Illumination is performed in each of two time zones, that is, a time zone from t3 shown in FIG. 1 to t4 after noon. A living room is used as one room in the house, and a resident of the house stays in this living room almost all the time except sleep time.

The illumination is performed by an illumination system S1 schematically shown in FIG. The lighting system S1 shown in the figure includes a ceiling light (ceiling light) L1 and a control unit C10.

The ceiling light L1 comprises first and second two straight fluorescent tubes 1, 2. The first fluorescent tube 1 is a light bulb color fluorescent lamp (color temperature 3000).
K), the second fluorescent tube 2 is a daylight fluorescent lamp (color temperature 6500
K), and the first and second fluorescent tubes 1, 2
By selectively turning on one or both of them, the color temperature of the light from the ceiling light L1 can be adjusted stepwise. Also,
Each of the first and second fluorescent tubes 1 and 2 has a light emission level such that the illuminance in the living room (measured value on a horizontal plane 0.85 m above the floor surface) becomes low illuminance and high illuminance, respectively. As described above, as one of the first and second fluorescent tubes 1 and 2 is selectively turned on, or both are turned on at the same time, the light emission level of the light source light by the ceiling light L1 is increased. Is adjusted step by step.

The first and second fluorescent tubes 1 and 2 are
It is connected to the control unit C10, and the control unit C10 performs an operation of turning on and off the light, respectively. The control unit C10 has a built-in timer (not shown), and is configured to automatically turn on / off each of the fluorescent tubes 1 and 2 at a predetermined time. Further, a switch (not shown) is provided in the control unit C10 so that the operation of turning on and off the fluorescent tubes 1 and 2 can be performed manually.

In the method exemplified here, the first fluorescent tube 1 is automatically turned on at t1 before sunset shown in FIG. 1, and the second fluorescent tube 2 is automatically turned on at t3 when the user wakes up. The light is manually turned off at each of the bedtime t2 and the time t4 after noon, and the daylight illumination is used from t4 after noon to t1 before sunset. That is, the first fluorescent tube 1 having a low color temperature and a low light emission level is turned on during the calming period P1, and the second fluorescent tube 2 having a high color temperature and a high light emission level is turned on during the activation period P2. I try to keep it. Thereby, the lighting in the living room includes a large amount of low color temperature light in the calming period P1 and has a low light emission level.
The activation period P2 is controlled so as to include a large amount of high color temperature light and to have a high light emission level, and to automatically control a part of the operation, that is, the lighting operation.

The above-described lighting control method conforms to the phase of the human biological rhythm, and is therefore particularly desirable for occupants in physiological aspects. The following is an example of an experiment in which the effect of the same illumination method as described above on the human physiological surface was examined.

[Experimental Example 1] Red light, green light and blue light were respectively bathed for 5 hours at 21:00 to 2:00 at night.
In each case, the core body temperature was measured approximately every hour until 9:00, and 21:00, 23: 3
The amount of melatonin secretion was measured at 0, 2:00, and 8:00. The illuminance of the above three lights is 1000lux
As a control, the same time was spent under the condition of an illuminance of 50 lux.

The above experiment yielded the results shown in FIG. As shown in the figure, when exposed to green light or blue light, a decrease in body temperature and an increase in melatonin secretion are significantly suppressed, and this phenomenon occurs during sleep, that is, after light is turned off (2: 0).
0). On the other hand, when exposed to red light, body temperature and melatonin secretion showed almost the same behavior as in the control.

[Experimental Example 2] In Experimental Example 1, two kinds of light, high color temperature light and low color temperature light, are used by a daylight fluorescent lamp (color temperature 6500K) and a bulb color fluorescent lamp (color temperature 3000K). Except for doing the same,
Core body temperature and melatonin secretion were measured.

From the above experiment, the result shown in FIG. 4 was obtained. As shown in the figure, when exposed to high color temperature light,
The decrease in body temperature and the increase in melatonin secretion were remarkably suppressed, and this phenomenon continued even during sleep. On the other hand, the degree of suppression as described above is smaller when exposed to low color temperature light than when exposed to high color temperature light.

Experimental Example 3 1000 lux and 2500
Red light, green light and blue light (total of 6 types) set to two types of lux of lux were immersed for 5 hours from 4:00 to 9:00 in the morning, respectively, and the behavior of core body temperature and melatonin secretion in each case was measured. Examined. As the Control, we spent the same time under the condition of 50 lux illuminance.

From the above experiment, the results shown in FIGS. 5 to 7 were obtained. As shown in the figure, at an illuminance of 1000 lux, any of red light, green light and blue light does not affect the rise in body temperature (FIG. 5) and the decrease in melatonin secretion (FIG. 7), but the illuminance is 2500 lux. In the case of, green light promoted both increase in body temperature (FIG. 6) and decrease in melatonin secretion (FIG. 7).

From the results of Experimental Examples 1 to 3, even under the same illuminance condition that is the same in human visibility, light containing a large amount of long wavelength components as light wavelength components, that is, low color temperature light It can be seen that red light has little effect on human biological rhythm, and light containing a large amount of medium to short wavelength components, that is, high color temperature light / green to blue light has a large effect on human biological rhythm.

Specifically, the high color temperature light / green to blue light is
It acts on the rhythm of body temperature so as to suppress the decline during the descending period at night, and to promote the rise during the rising period in the morning. Similarly, it acts on the melatonin rhythm so as to suppress the increase during the nighttime secretory period, and to promote the decrease during the morning secretory period.

Since the human melatonin rhythm is known to have a strong inverse correlation with the human body temperature rhythm, the above-mentioned contents are, in other words, as follows. That is, the high color temperature light / green-blue light suppresses the increase in melatonin secretion at night and acts to promote the decrease in melatonin secretion in the morning,
As a result, the body temperature behavior that the deep body temperature drop at night was suppressed and the deep body temperature rise at the morning was promoted appeared.

Considering the results of Experimental Example 3 in comparison with the results of Experimental Example 1, light containing a large amount of long-wavelength components (here, red Light) has a small effect on the biological rhythm, and light (here, green light) containing a large amount of medium to short wavelength components has a large effect on the biological rhythm. It can be seen that the case (2500 lux) is larger than the case at night (1000 lux).

[Experimental Example 4] The indoor illuminance was set to 5000 during the day.
lux and 60 lux were set and spent, and the behavior of core body temperature in each case was examined.
In all cases, the room temperature was the same. As a result, the illuminance was 5
At 000 lux, it was observed that the core temperature at night decreased significantly. When the illuminance was set to 60 lux, it was recognized that the person felt colder. From these results, it can be seen that setting a high-illuminance light environment during the day affects the human rhythm not only during the day but also at night.

[Summary 1] The following findings can be obtained from the above Experimental Examples 1 to 4. From night to early morning, especially the direction of biological rhythm from midnight to calm down,
The purpose is to reduce body temperature and increase melatonin secretion, which manifests this. A light environment that supports this purpose, or at least contains a large amount of low color temperature light that does not interfere, may be desirable at night. On the other hand, the direction of the biological rhythm is from early morning to noon to evening, especially in the morning, and its purpose is to increase body temperature and decrease melatonin secretion, which indicates this. To provide a light environment that contains a lot of high color temperature light to support this purpose,
It is considered desirable in the morning.

Further, in order to support the above purpose, a low illuminance light environment is used at night when the direction of the biological rhythm is calming, and a high illuminance light environment is used in the morning when the direction of the biological rhythm is active. Is considered more desirable. Also,
It is considered that spending in a high-illuminance light environment during the day is also important in terms of securing the amplitude of the biological rhythm.

The results obtained in the above-mentioned Experimental Examples 1-4 are as follows:
It is also possible to take into account the action of the light receiving organ on the biological rhythm.

It is considered that the M-cone among the three types of cones L, M, and S on the retina is involved in the light receiver related to the human biological rhythm. Hereinafter, an example of an experiment in which the involvement of the M-cone in the human biological rhythm was examined will be described.

[Experimental Example 5] The core body temperature and the amount of melatonin secretion were measured in the same manner as in Experimental Example 1 except that the subject was a second color-blind person having a congenital M-cone disorder. . As a result, there was no effect on the body temperature rhythm and the melatonin rhythm in any of red light, green light and blue light.

[Experimental Example 6] The L-
The amount of stimulus received when the cone, M-cone and S-cone were color-adapted was calculated by the CIE (International Commission on Illumination) chromatic adaptation equation, and the effect on core temperature and melatonin secretion at that time was calculated. Compared to the degree. As a result, it was confirmed that there was a strong correlation between the amount of stimulation that the M-cone received from the experimental light and the degree of influence on core body temperature and melatonin secretion.

From the results of Experimental Example 5 and Experimental Example 6,
It is strongly suggested that the M-cone is involved as a light receiver related to human biological rhythm.

[Summary 2] From the experimental examples 5 and 6, the involvement of the M-cone in human biological rhythm is considered.
Here, it is known from Experimental Example 3 that when a specific amount of specific light is received, the degree of influence on core body temperature and melatonin secretion is different between morning and night. , M-cone sensitivity. Diurnal variations in receiver sensitivity have previously been identified as a visual problem. Although the M-cone plays an important role visually, it is considered that it also functions as a light receiver related to the biological rhythm as described above. It is considered to be recognized in the rhythm.

Based on the consideration of the light receiving organ relating to the biological rhythm, the results obtained from the above experimental examples can be summarized again as follows.
At night, when the direction of the biological rhythm is calming, light that does not contain much wavelengths that fall into the spectral sensitivity distribution of the M-cone is preferable, and in the morning when the direction of the biological rhythm is active, the light of the M-cone is low. It is considered that light containing a large number of wavelengths falling within the spectral sensitivity distribution is preferable. The M-cone has a sensitivity peak at about 540 nm, which roughly corresponds to the spectral distribution of green light.

In the illumination control method shown in FIGS. 1 and 2, the lighting operation of the first and second fluorescent tubes 1 and 2 is automatically controlled as described above. Here, if this operation is performed manually, for example, in each of the lighting time zones t1-t2 and t3-t4, the one to be lit among the first and second fluorescent tubes 1 and 2 is erroneously selected. A situation, that is, an erroneous operation is considered to occur, and the operation itself is troublesome. However, by automatically controlling as described above, the lighting operation can be performed reliably and accurately without trouble.

In the above-described illumination control method, the first and second fluorescent tubes 1 and 2 are turned off manually. Generally, when the light is turned off,
Since it is customary that the time is not constant, it is preferable to manually operate with a switch, a remote controller, or the like.

The lighting system S1 shown in FIG.
Is a ceiling light L arranged to be able to adjust the color temperature.
1, the ceiling light L1 is turned on at a low color temperature during the calming period P1, and the ceiling light L is turned on during the activation period P2.
And a control unit C10 capable of automatically controlling at least a part of the operation so that the lighting unit 1 is turned on at a high color temperature. In addition, an appropriate light environment can be obtained, and the operation of turning on and off or adjusting the lighting can be performed reliably and accurately without any trouble.

Further, in the lighting system S1, the control unit C10 turns on the ceiling light L1 at a low light emission level during the calming period P1, and the ceiling light L during the activation period P2.
1 can be controlled so as to be lit at a high color temperature. By using the illumination system S1, it is more desirable to secure the amplitude of the biological rhythm, and therefore, a physiologically more favorable light environment is obtained. Obtainable.

Further, in the above-mentioned lighting control method, the lighting is controlled in accordance with the time, so that the operation of turning on and off or adjusting the lighting can be performed reliably and accurately.

The lighting system S1 includes a control unit C
10 is provided with a timer for performing the operation in accordance with the time, and by using the lighting system S1, the operation of turning on / off or adjusting the lighting can be performed reliably and accurately based on the time. it can.

The lighting control method and the lighting system shown in FIGS. 1 and 2 are, of course, examples of the embodiment of the present invention, and the present invention is not limited to this. Hereinafter, examples of possible embodiments of the present invention will be described more broadly.

In the present invention, as a light source for illumination containing a large amount of low color temperature light, for example, a light bulb color fluorescent lamp (color temperature of about 3000 K), a warm white fluorescent lamp (color temperature of 35 K)
00K), a halogen lamp (color temperature of about 3000K), an incandescent light bulb (color temperature of about 2850K) and the like. On the other hand, examples of a light source for illumination containing a large amount of high color temperature light include a daylight fluorescent lamp (color temperature of about 6500K) and a neutral white fluorescent lamp (color temperature of about 5000K). Also, for example, a high-pressure mercury lamp (color temperature 570)
It is considered that light having a wavelength included in the spectral sensitivity distribution of the M-cone has a high ratio of light due to (0 to 5800 K).

In addition to the light sources listed above, various light sources having the same color temperature can be used, and a light source having a desired color temperature may be prepared. Thereby, a light source having an arbitrary color temperature can be obtained.

Regarding the setting method of the lighting time zone (illumination schedule), it is considered from the above experimental example that the light environment in the late time zone is particularly important at night. It is also possible to turn on the first light source having a low color temperature in the time zone of, and to arbitrarily illuminate as needed in the earlier time zone. Also, in the morning, based on the experimental example, the second light source having a high color temperature is turned on during a time period of, for example, 4:00 to 9:00, and an arbitrary lighting is performed in other time periods. It is also possible.

On the contrary, the lighting times of the first light source and the second light source can be set as long as possible. An example of a daily lighting schedule (not shown) in such a case is shown in order from the morning, and high color is applied in the morning to daytime from dawn time (for example, 4:00) before wake up to sunset. Turning on the second light source of the temperature, adjusting the lighting at the sunset, and turning on the first light source of the low color temperature thereafter throughout the night until going to bed. Further, during the sleep time, for example, illumination with very low illuminance and low color temperature may be performed.

FIG. 8 shows another example of the lighting schedule. In the example shown in FIG.
The second fluorescent tube 2 similar to that used in the illumination control method shown in FIGS.
At 0, the illumination is automatically adjusted to switch to the first fluorescent tube 1, and at the time of bedtime t2, the first fluorescent tube 1 is manually turned off. On the other hand, the unclear time before the wake-up time t3 4:
At 00, the second fluorescent tube 2 is automatically turned on, and at t4 after noon
Then, the second fluorescent tube 2 is manually turned off, and thereafter, the daylight illumination is performed.

In the lighting schedule illustrated in FIG. 8, similarly to the above-described example (not shown), adjustment of the lighting at a specific time, that is, switching from a light source having a high color temperature to a light source having a low color temperature is performed. However, the automatic control as described above is also advantageous in the case of such a lighting adjustment operation. That is, before and after this adjustment operation, the lighting is always in the lighting state, so if this operation is performed manually,
It is easy to forget the operation itself and it is troublesome. In contrast,
According to the automatic control as described above, the operation can be performed reliably and accurately without any trouble.

In the present invention, the illuminance in the nighttime lighting period may be set to, for example, about 1000 lux or less. From the experimental examples, it has been found that, at night, if the illumination includes a large amount of low color temperature light, the tendency of the biological rhythm to subside is not significantly inhibited even under the illumination condition of about 1000 lux. Further, for example, about 500 lux or less, preferably about 100 lux or less,
If it is more preferably about 50 lux or less, the tendency to suppress the calming of the biological rhythm is further reduced, and a more psychologically calm and warm light environment can be achieved.

On the other hand, the illuminance in the morning lighting time period is, for example, larger than about 1000 lux, preferably 2500 lux.
It may be set to a degree or more. From the experimental example 3, it has been found that in the morning, if the illumination includes a large amount of high color temperature light, the tendency of the activation of the biological rhythm is promoted under the illumination condition of about 2500 lux. Further, it is known from Experimental Example 4 that it is desirable to spend an illuminance condition of, for example, about 5000 lux or more to secure the amplitude of the biological rhythm.

For example, it is also possible to make the illuminance as high as in the morning even at night. Even in this case,
It is considered that if the lighting includes a large amount of low color temperature light, undesired effects on human biological rhythm are relatively small.

As the illumination system used in the present invention, any of direct illumination, semi-direct illumination, semi-indirect illumination, and indirect illumination can be adopted.

In the case of indirect illumination, for example, as shown in FIG. 9, a light source (fluorescent tube) 5 is
It has been conventionally proposed to illuminate the room with indirect light by using a structure in which the curtain is covered with a curtain plate 6 to thereby obtain a feeling of expansion (Japanese Patent Laid-Open No. 10-32101).
9), the method of the present invention may be applied to such an indirect illumination structure. In this case, for example, instead of the light source 5, a first light source having a low color temperature and a second light source having a high color temperature may be arranged side by side.
Further, in this case, if the first and second light sources are mounted on the curtain plate 6 instead of the wall surface 4, the light source and the curtain plate 6 can be integrally manufactured in advance, and the mounting work on site can be performed. Can be simplified. Furthermore, in the indirect lighting structure shown in FIG. 9, since the curtain rail 8 is provided using the metal fitting 7 for attaching the curtain plate 6 to the wall surface 4, the indirect lighting structure is adopted. The curtain plate 6 can also function as a curtain rail box.

As the indirect lighting structure, other than the above, for example, a structure in which a light source is embedded in a wall and indirect light is introduced into a room through a slit or the like provided at an appropriate position on the wall. Etc. are also possible. Furthermore, the lighting can be arranged not only on the wall but also on the ceiling, and can be arranged not only horizontally but also vertically.

The types of lighting fixtures used in the present invention include, for example, those directly mounted on a ceiling (or wall) (such as ceiling lights), recessed ones (such as downlights), and semi-recessed ones. Any type such as a ceiling-hanging type (such as a pendant) can be used. When a fluorescent tube is used as the light source, any of a ring shape and a straight tube can be used. In addition to the fluorescent tube, any light source known in the art, such as an incandescent light bulb or a halogen light bulb, can be used.

FIGS. 10 and 11 show other examples of the light source. The light source 9 shown in the figure is composed as a whole by overlapping and twisting the first fluorescent tube 1 having a low color temperature and the second fluorescent tube 2 having a high color temperature. This is a single rod-shaped light source, and light of different color temperatures can be obtained by turning on one or both of the first and second fluorescent tubes 1 and 2. According to the light source obtained by combining and integrating a plurality of light sources having different color temperatures in this manner, the low color temperature light and the high color temperature light can be uniformly emitted in almost all directions, respectively, and the light source can be made compact. Occupied space can be reduced.

In the present invention, as a method of adjusting the color temperature of the illumination, various methods other than selectively lighting the two types of light sources are possible. For example, by combining a single light source with one or more kinds of color temperature conversion filters and exposing the light source to light up, or lighting up with one of the filters covering the light source. Alternatively, light of different color temperatures may be obtained. Alternatively, for example, light obtained by using three or more types of light sources having different color temperatures, selecting two or more types of light sources from among these, simultaneously lighting and mixing light, and changing the combination of these light sources. May be different. When three types of light sources are used, including a case in which only one type is used and a case in which all three types are used, there are a total of seven combinations of light sources. Further, in this case, if the three types of light sources correspond to red light, green light, and blue light, respectively, the light color can be changed widely in the visible light region.

In addition to adjusting the light by turning on and off the light source, the light may be adjusted continuously. For example, as shown in FIG. 12, each of the first straight tube fluorescent tube 1 having a low color temperature and the second straight tube fluorescent tube 2 having a high color temperature continuously emits light by frequency control by an inverter. When the light emission level of the first fluorescent tube 1 is continuously lowered from 100% to 0%, the light emission level of the second fluorescent tube 2 is adjusted to 0% to 0%. 1
A configuration that continuously increases to 00% is mentioned. This allows for a gradual switch from low color temperature light to high color temperature light (or vice versa), thus switching between a state rich in low color temperature light and a state rich in high color temperature light. The lighting can be adjusted continuously. According to such a continuous adjustment method, the light environment can be gently changed in accordance with the visual adaptation characteristics, and the comfort can be further improved.

In the present invention, as a method of automatically controlling the operation of turning on / off or adjusting the illumination, in addition to the automatic control according to the time, for example, a method of automatically controlling according to the day-night fluctuation of the brightness in the outdoors can be cited.

FIG. 13 schematically shows an example of an illumination system in which the operation of turning on and off or adjusting the illumination can be automatically controlled in accordance with daytime and nighttime fluctuations in brightness outdoors. The illumination system S2 shown in the figure has a configuration in which an optical sensor PS is further added to the same system as the illumination system S1 shown in FIG. 2 (for this reason, here, it is the same as that shown in FIG. 2). Is given the same symbol.
The description is omitted). The optical sensor PS is arranged outdoors and connected to the control unit C10. In the illumination system S2, when the brightness changes outdoors, the optical sensor PS detects the change in brightness and sends a signal to the control unit C10, and the control unit C10 performs the first and the second control based on the signal. The operation of turning on and off the second fluorescent tubes 1 and 2 is automatically performed.

FIG. 14 shows an example of an illumination schedule set according to daytime and nighttime variations in brightness outdoors. Based on the lighting schedule shown in the figure, the procedure for performing lighting by the lighting system S2 shown in FIG. When waking up
3 at sunrise time t13, the optical sensor PS detects an increase in brightness outdoors, and automatically turns on the second fluorescent tube 2 and thereafter until the sunset t11.
Is basically turned on. At time t11 at sunset, a decrease in brightness outdoors is detected by the optical sensor PS, and the second fluorescent tube 2 is automatically switched to the first fluorescent tube 1, and thereafter the first fluorescent tube 1 is kept until bedtime t2. The fluorescent tube 1 is turned on, and the first fluorescent tube 1 is manually turned off at a time t2 at bedtime.

In the above example, the first and second fluorescent tubes 1 and 2 are turned on at sunset time t11 and sunrise time t13, respectively. The first and second fluorescent tubes 1 and 2 may be turned on at a desired time interval from the sunset time t11 to the sunrise time t13. Further, for example, a change in brightness is detected with higher accuracy, and the first and second fluorescent tubes 1 and 2 are turned on and off at times other than the sunset time t11 and the sunrise time t13. You may. Furthermore, for example, the first and second fluorescent tubes 1 and 2 are configured so that the light can be continuously adjusted as described above, and the light is continuously adjusted according to the increase or decrease of the outdoor brightness. You may make it.

As described above, in the method of automatically controlling the operation of turning on and off or adjusting the lighting in accordance with the variation in the brightness of the outdoors outdoors, the operation of turning off and on or adjusting the lighting is reliably and reliably performed based on the diurnal change of the outside world. Can be done accurately. Day-night fluctuations in brightness outdoors are among the most basic external factors that define biological rhythms, and thus the above-described method provides a suitable light environment that naturally corresponds to human biological rhythms. be able to.

The lighting system S2 includes a control unit C
10 is provided with an optical sensor PS for performing the operation in accordance with daytime and nighttime variations in brightness outdoors. By using the illumination system S2, the operation of turning on / off or adjusting the illumination can be performed on an external day. It can be performed reliably and accurately based on the circumferential change.

In the present invention, various methods can be used to adjust the light emission level of the illumination depending on the configuration of the light source, and both stepwise adjustment and continuous adjustment are possible. For example, as shown in FIG. 15, in a lighting fixture L3 composed of a plurality of types of light sources 1 and 2 having different color temperatures, each type of light source 1/2 is replaced with a plurality of light sources 1, 1 and 2 having the same color temperature. By configuring 1/2, 2 and 2, and increasing or decreasing the number of light sources to be lit among these,
It is also possible to adjust only the light emission level stepwise. For example, when a light source capable of adjusting the color temperature is formed by combining an incandescent lamp and a color temperature conversion filter (not shown), the light emission level can be easily adjusted stepwise or continuously with a single incandescent lamp. can do.

The lighting control method and the lighting system of the present invention can be applied to any space as long as the space is illuminated. In particular, it is often the case that a person stays most of the day. Space, for example, houses such as detached houses and apartment houses, accommodation facilities such as hotels and inns, medical facilities such as hospitals and nursing homes, transportation for long-distance operations (automobiles, railway vehicles, aircraft, ships, etc.) It can be suitably applied to such spaces.

[0076]

As described above, according to the illumination control method according to the first aspect of the present invention, during the calming period in the human biological rhythm, the illumination containing a large amount of low color temperature light is used. In the activation period of the above, the lighting is performed including a large amount of high color temperature light, so that an appropriate light environment according to the human biological rhythm can be obtained.

Furthermore, since at least a part of the operation of turning on / off the light or adjusting the light is automatically controlled,
This operation can be performed reliably and accurately without trouble.

The above method can provide a physiologically suitable light environment for all people, but especially for those who are restricted in their behavior, such as the elderly or disabled, or living This is particularly useful for people who have traditionally tended to be inadequate about the light environment, such as urban residents who prioritize the above convenience.

In addition, according to the illumination control method of the present invention, the illumination is set to a low emission level during the calming period and to a high emission level during the activation period. Since the control is performed, it is more desirable to secure the amplitude of the biological rhythm, and thus a physiologically more favorable light environment can be obtained.

In addition, according to the lighting control method of the third aspect of the present invention, the control of the lighting is performed in accordance with the time, so that the operation of turning on and off or adjusting the lighting can be performed reliably and accurately based on the time. It can be carried out.

In addition, according to the lighting control method of the fourth aspect of the present invention, the control of the lighting is performed according to daytime and nighttime fluctuations of the brightness in the outdoors, so that the operation of turning the light off and on or adjusting can be performed by the outside world. It can be performed reliably and accurately based on the diurnal change.

Further, according to the lighting system of the fifth aspect of the present invention, the lighting apparatus arranged so as to be capable of adjusting the color temperature and the lighting apparatus having a low color temperature during the calming period in the human biological rhythm. And a control unit that can automatically control at least a part of the operation so that the lighting apparatus is turned on at a high color temperature during the activation period. Accordingly, it is possible to obtain an appropriate light environment according to a human biological rhythm. Furthermore, at least a part of the operation of turning on or off the light or performing the adjustment can be automatically controlled, so that the operation can be performed reliably and accurately without trouble.

In addition, according to the lighting system of the sixth aspect of the present invention, the control unit turns on the lighting apparatus at a low light emission level during a calming period in a human biological rhythm, and activates the lighting unit at a low light emitting level. Since the lighting apparatus can be controlled so as to be turned on at a high light emission level, the use of the lighting system is more preferable in securing the amplitude of the biological rhythm, and is therefore more physiologically preferable. Light environment can be obtained.

Further, according to the illumination system of the present invention, since the timer is provided for performing the operation of the control unit according to the time, the illumination system is used. Accordingly, the operation of turning on / off the light or adjusting the lighting can be performed reliably and accurately based on the time.

Further, according to the illumination system of the present invention, the control unit is provided with an optical sensor for performing the operation in accordance with daytime and nighttime fluctuations in brightness outdoors. By using the illumination system, the operation of turning on / off or adjusting the illumination can be performed reliably and accurately based on the diurnal change in the outside world.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a lighting control method according to an embodiment.

FIG. 2 is a schematic diagram showing a lighting system used in the lighting control method of FIG. 1;

FIG. 3 is a graph showing the effects of red light, green light and blue light on body temperature rhythm and melatonin rhythm at night.

FIG. 4 is a graph showing the effects of high color temperature light and low color temperature light on nighttime body temperature rhythm and melatonin rhythm.

FIG. 5 is a graph showing the effect of red light, green light and blue light (1000 lx) on body temperature rhythm in the morning.

FIG. 6 is a graph showing the effect of red light, green light and blue light (2500 lx) on morning body temperature rhythm.

FIG. 7 is a graph showing the effect of red, green and blue light on morning melatonin rhythm.

FIG. 8 is a schematic diagram showing another example of the lighting schedule.

FIG. 9 is a schematic side view showing an example of an indirect lighting structure.

FIG. 10 is a side view showing another example of the light source.

FIG. 11 is a sectional view taken along line AA of FIG. 10;

FIG. 12 is a schematic diagram showing an aspect when the light emission levels of the first and second fluorescent tubes are continuously changed.

FIG. 13 is a schematic diagram showing another example of the lighting system.

FIG. 14 is a schematic diagram showing another example of the lighting schedule.

FIG. 15 is a schematic plan view showing another example of a lighting fixture.

[Explanation of symbols]

 1 First fluorescent tube (illumination containing a lot of low color temperature light) 2 Second fluorescent tube (illumination containing a lot of high color temperature light) ○ Lighting P1 Calming period in human biological rhythm P2 Activity in human biological rhythm Transition period

Claims (8)

[Claims] 1. A method for controlling illumination in accordance with a human biological rhythm, wherein the human biological rhythm includes a low color temperature light during a calming period, and the human biological rhythm is activated. A lighting control method for automatically controlling at least a part of the operation so that the lighting includes high color temperature light in a period. 2. The illumination control method according to claim 1, wherein the illumination is controlled so as to have a low light emission level during the calming period and to have a high light emission level during the activation period. 3. The lighting control method according to claim 1, wherein the lighting control is performed according to time. 4. The lighting device according to claim 1, wherein the control of the illumination is performed in accordance with daytime and nighttime fluctuations of the brightness in the outdoors.
3. The lighting control method according to 1. 5. A system for illuminating according to a human biological rhythm, comprising: a lighting device arranged so as to be capable of adjusting a color temperature; And a controller capable of automatically controlling at least a part of the operation so that the lighting apparatus is turned on at a high color temperature during an activation period. 6. The control unit may control the lighting device to be turned on at a low light emission level during a calming period in a human biological rhythm, and the lighting device to be turned on at a high light emission level during an activated period. 6. The method according to claim 5, wherein
The lighting system according to claim 1. 7. The lighting system according to claim 5, further comprising a timer for performing the operation of the control unit according to time. 8. The lighting system according to claim 5, further comprising an optical sensor for performing an operation of the control unit in accordance with daytime and nighttime fluctuations in brightness outdoors.