JP2000294385A - Method for planning artificial lighting - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the optimum lighting environment corresponding to the biological rhythm of man by lighting a first light source of low color temperature in the tranquilized period of the biological rhythm of man, and lighting a second light source of high color temperature in the activated period of the biological rhythm of man. SOLUTION: For example, a ceiling light consists of the first and second annular fluorescent tubes. The first fluorescent tube is a fluorescent lamp of bulk color (color temperature 3000K) having a small diameter, and the second fluorescent tube is a fluorescent lamp of daylight color (color temperature 6500K) having a large diameter. The ceiling light can be gradually modulatably switched on and off by a switch S1. When a control 3 is adjusted to a position of 'LOW', only the first fluorescent tube is lighted, when the control 3 is adjusted to a position of 'HIGH', only the second fluorescent tube is lighted, and when the control 3 is adjusted to a position 'MIDDLE', the first and second fluorescent tubes are lighted. Whereby the first fluorescent tube of low color temperature and low luminescent level is lighted in the tranquilized period, and the second fluorescent tube of high color temperature and high luminescent level is lighted in the activated period.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an artificial lighting planning method for designing an appropriate light environment 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 circumstances, and has as its object to provide an artificial lighting planning method capable of obtaining an appropriate light environment according to a human biological rhythm.

[0009]

According to the first aspect of the present invention, there is provided an artificial lighting planning method for artificially adjusting a light environment according to a human biological rhythm. A planning method, wherein a low color temperature first light source is turned on during a calming period in the human biological rhythm,
In the activation period of the human biological rhythm, a second light source having a high color temperature is turned on.

According to a second aspect of the present invention, in the artificial lighting planning method according to the first aspect, the first light source is turned on at a low light emission level, and the second light source is turned on. Is turned on at a high light emission level.

[0011] In the present invention, the term “calming phase in the human biological rhythm” substantially corresponds to the 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.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. As shown in FIG. 1, the artificial lighting planning method according to the present embodiment includes a calming period (hereinafter, simply referred to as a calming period) in a human biological rhythm.
At P1, the first light source 1 having a low color temperature is turned on to activate the human biological rhythm (hereinafter simply referred to as the activation period).
P2 is for turning on the second light source 2 having a high color temperature.

In the method exemplified here, in one room in a house, the lighting time zone at night, ie, the time zone from t1 before sunset to the bedtime t2 shown in FIG. 1, and the lighting time zone in the morning, ie, 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 using a ceiling light (ceiling light) L1 schematically shown in FIG.
The ceiling light L1 shown in FIG. 1 includes first and second two annular fluorescent tubes 1 and 2, and the first fluorescent tube 1 has a small-diameter bulb-color fluorescent lamp (color temperature of 3000K) and a second fluorescent lamp. 2
Fluorescent tube 2 is a large-diameter daylight fluorescent lamp (color temperature 6500K)
It has become. Also, 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 the horizontal plane at 0.85 m above the floor) becomes low illuminance and high illuminance, respectively. The ceiling light L1 can be turned on and off in a stepwise manner by the switch S1 shown in FIG. That is, when the knob 3 is set to the “low” position, only the first fluorescent tube 1 is turned on, and when the knob 3 is set to the “high” position, only the second fluorescent tube 2 is turned on, and the knob is set to the “middle” position. And both the first and second fluorescent tubes 1 and 2 are turned on.

As shown in FIG. 1, the first fluorescent tube 1 is turned on during the night lighting period t1-t2, and the second fluorescent tube 2 is turned on during the morning lighting period t3-t4. It is lit, and 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 have to. As a result, the light environment in the living room becomes
1 is artificially adjusted so that the activation period P2 contains a large amount of high color temperature light and has high illuminance so as to include a large amount of low color temperature light and has low illuminance. Like that.

The above-mentioned lighting method is in accordance with 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 from 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 of 6500K) and a bulb color fluorescent lamp (color temperature of 3000K). Except for doing the same,
Core body temperature and melatonin secretion were measured.

The above experiment yielded the results shown in FIG. 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. 6 to 8 were obtained. As shown in the figure, at an illuminance of 1000 lux, there is no effect on the increase in body temperature (FIG. 6) and decrease in melatonin secretion (FIG. 8) in any of red light, green light and blue light, but illuminance of 2500 lux In both cases, green light promoted both increase in body temperature (FIG. 7) and decrease in melatonin secretion (FIG. 8).

From the results of Experimental Examples 1 to 3, even under the same illuminance condition which 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 1-4. 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 Experimental Examples 1 to 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 among the three types of cones L, M and S on the retina, the M-cone is involved as a light receiver relating 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] Under the experimental light conditions at night, 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.

In view of the consideration of the light receiving organ relating to the biological rhythm, the results obtained by 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.

The illumination method shown in FIGS. 1 to 3 is, of course, an example of an 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 the first light source having a low color temperature, for example, an incandescent fluorescent lamp (color temperature of about 3000K), a warm white fluorescent lamp (color temperature of about 3500K), a halogen lamp (color temperature of about 3000K) And an incandescent light bulb (color temperature of about 2850K). On the other hand, as the second light source having a high color temperature, for example, a daylight fluorescent lamp (color temperature 65
00K), daylight white fluorescent lamp (color temperature about 5000K)
And the like. Also, for example, it is considered that light from a high-pressure mercury lamp (color temperature of about 5700 to 5800 K) has a high ratio including a wavelength included in the spectral sensitivity distribution of the M-cone.

Further, 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 method of setting the lighting time zone (illumination schedule), it is considered from the above experimental example that the light environment especially in the late time zone is 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 as described above can be set as long as possible. An example of a lighting schedule for a day in such a case is shown in order from the morning. In the morning to daytime from dawn (e.g., 4:00) before sunset until sunset, the second color schedule of high color temperature is high. Turning on the light source, adjusting the lighting at the sunset, and turning on the first light source with a low color temperature thereafter throughout the night until bedtime. Further, during the sleep time, for example, illumination with very low illuminance and low color temperature may be performed.

FIG. 9 shows another example of the lighting schedule. In the example shown in FIG.
Until 00, the second fluorescent tube 2 similar to that used in the lighting method shown in FIGS. 1 to 3 is turned on, and from 21:00 to bedtime t2, the first fluorescent tube 1 is turned on. I have to. On the other hand, the second fluorescent tube 2 is turned on from 4:00, which is before dawn time t3, until t4 after noon, and thereafter is daylight illumination.

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 example, at night, if the light environment including a large amount of low color temperature light is maintained, 1000
It has been found that the tendency of the rhythm of the biological rhythm to subside is not largely inhibited even under the illuminance condition of about lux. Furthermore, for example, about 500 lux or less, preferably 100 lux
When it is less than or equal to about 50 lux, the tendency to suppress the calming of the biological rhythm is further reduced, and a more calm and warmer light environment can be obtained psychologically.

On the other hand, the illuminance in the morning lighting 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 light environment including a large amount of high color temperature light is maintained, 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.

It should be noted that, for example, it is also possible to provide a light environment with a high illuminance at night as well as in the morning. Even in this case, it is considered that if the light environment including a large amount of low color temperature light is maintained, the unfavorable influence on the human biological rhythm is 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 lighting, for example, as shown in FIG.
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. 10, since the curtain rail 8 is provided using the metal fitting 7 for attaching the curtain plate 6 to the wall surface 4, by employing the indirect lighting structure, The curtain plate 6 can also function as a curtain rail box.

As the indirect lighting structure, besides the above, for example, a structure in which a light source is buried 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 the ceiling (or wall) (such as ceiling lights), recessed types (such as downlights), semi-recessed types, and the like. 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. 11 and 12 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 light source, various methods other than selectively turning on 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 as shown in FIG. 13, for example. In the example shown in FIG.
A fluorescent lamp L2 including a first straight fluorescent tube 1 having a low color temperature and a second straight fluorescent tube 2 having a high color temperature is connected to the controller C1. Each of the first and second straight tube fluorescent tubes 1 and 2 can continuously adjust the light emission level by frequency control by an inverter. The knob 10 of the controller C1 is moved from the lower end to the upper end. When it is raised, the emission level of the first straight tube type fluorescent tube 1 continuously decreases from 100% to 0%, and the emission level of the second straight tube type fluorescent tube 2 continuously increases from 0% to 100%. (The on / off switch is not shown here). As a result, it is possible to gradually switch from low color temperature light to high color temperature light (or vice versa). Therefore, the indoor light environment is changed to a state including a large amount of low color temperature light and a large amount of high color temperature light. It can be continuously adjusted between the included state. 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 controller C1 and the switch S1 shown in FIG. 3, for example, "night", "morning / day", etc. are displayed at the lighting positions of the first and second fluorescent tubes 1 and 2, for example. May be added to each. In the present invention, for example, the first fluorescent tube 1 having a low color temperature is turned on at night, and the second fluorescent tube 2 having a high color temperature is turned on at morning / daytime. If it is only a display that indicates the difference between high and low and strong and weak, there is a tendency that the light source to be turned on in each time zone is not correctly selected and erroneous operation is likely to occur, but as described above, the display indicating the difference between day and night is displayed. By attaching, such erroneous operations can be reduced.

Further, for example, control may be performed so that at least a part of the operation of turning on / off the light and the adjustment is automatically performed. In the case of turning off the light, the time is usually not constant, so it is generally preferable to manually operate the switch or a remote controller. However, in the case of turning on or adjusting the light, the time is often almost constant. Therefore, it may be advantageous to perform this operation by automatic control. In particular, when the light source is switched at a specific time, that is, when switching from the second light source having a high color temperature to the first light source having a low color temperature at sunset, for example, the time should be fixed. Is relatively easy, but if this operation is performed manually, the operation itself is easily forgotten and troublesome. On the other hand, according to the automatic control as described above, the operation of turning on or adjusting the lighting can be performed reliably and accurately without any trouble.

The automatic control method includes, for example, a method of automatically controlling the operation of turning on or adjusting the lighting in accordance with the time. Specifically, for example, a timer may be set according to a desired lighting schedule, and the lighting or adjustment of the lighting may be automatically performed at the set time.

Further, for example, there is a method of automatically controlling the operation of turning on or adjusting the lighting in accordance with the change in the brightness day and night outdoors. Specifically, for example, an optical sensor is provided outdoors, and a timing at which the brightness of the outdoor is changed is detected by the optical sensor, and the lighting or adjustment is automatically performed at the changed timing. I just need.

Even in the case of the automatic control as described above, it is more desirable to continuously adjust the light as described above. For example, when an optical sensor is used, it is exemplified that the light is continuously adjusted in accordance with the increase or decrease of the outdoor brightness.

In the present invention, various methods can be used for adjusting the light emission level of the light source, depending on the configuration of the light source, and both stepwise adjustment and continuous adjustment are possible. Both manual control and automatic control are possible. For example, as shown in FIG. 14, a lighting fixture L including a plurality of types of light sources 1 and 2 having different color temperatures.
In 3, each type of light source ２ is further composed of a plurality of light sources 1, 1, 、 ２, 2 and 2 having the same color temperature, and the number of light sources to be turned on is increased or decreased. Thus, only the illuminance can be adjusted stepwise. Further, for example, when a light source capable of adjusting the color temperature is configured by combining an incandescent lamp and a color temperature conversion filter (not shown), the illuminance can be easily adjusted stepwise or continuously with a single incandescent lamp. be able to.

In the present invention, the lighting schedule is
The setting may be made according to social factors irrespective of an external natural factor (hereinafter, referred to as a natural factor) such as day-night variation in brightness outdoors.

In general, a person's life is originally performed in accordance with the diurnal change of the outside world such as light and dark, and therefore, basically, a person's life pattern conforms to the diurnal change such as light and dark. It should be. When such a match is established, it is considered that the phase of the human biological rhythm also matches the rhythm of fluctuation such as light and dark,
Therefore, it is considered that there is no particular problem even if the lighting schedule is set according to a natural factor.

However, a person's life pattern is actually greatly influenced by social factors rather than natural factors as described above. There are many cases where there is a large gap. For example, some people may routinely repeat a life pattern of being active in a dark time zone and sleeping in a bright time zone. Human biological rhythms are adjusted based not only on natural factors but also on social factors, so if the above-mentioned irregular living pattern becomes constant, It is conceivable that a change may occur to some extent under the influence of this. In such a case, it is considered that the lighting schedule set in accordance with only the natural factors is not suitable for not only the actual life pattern but also the physiological aspects of the person.

From the above, if the lighting schedule is set in accordance with the life pattern, that is, the social factor, even when it is considered that the biological rhythm is changed,
The lighting schedule can be adapted to this, and is therefore considered desirable from a physiological point of view.

FIG. 15 shows an example of a lighting schedule set according to a somewhat irregular life pattern. In the example shown in the figure, compared to the example shown in FIG. 1, the life pattern has shifted to a later time zone as a whole. That is, the lighting time period t11-t12 at night and the lighting time period t in the morning in the example shown here.
13-t14 is longer than the lighting time period t1-t2 at night and the lighting time period t3-t4 in the morning in the example of FIG.
Each is set to a late time zone.

The night lighting time period t11-
At t12 and the morning lighting time period t13-t14, the first fluorescent tube 1 and the second fluorescent tube 2 similar to those in the example of FIG. 1 are turned on. Here, the morning lighting time t13 is noon, but the time t1
The sleeping time is up to 3, and during this sleeping time, daylight is blocked by blinds to make the room as dark as possible.

The life pattern exemplified here is slower than the external diurnal change as described above. However, when such a life pattern becomes constant, the calming phase P1 and the activation in the biological rhythm become active. It is conceivable that the period P2 is also affected by this life pattern, and a slight deviation occurs from the rhythm of the change of the external brightness. In particular, with regard to the activation period P2, it is considered that the difference between the daytime and nighttime fluctuations of light and darkness outdoors is large. In the lighting schedule illustrated here, the lighting is set according to the life pattern, not the external diurnal change, and appropriate lighting is performed according to each of the calming period P1 and the activating period P2.

In the case where the lighting schedule is set according to social factors as in the example shown in FIG. 15, the control for turning on or adjusting the lighting is performed automatically.
For example, similarly to the above, by setting a timer, the lighting or the adjustment may be automatically performed at the set time.

The artificial lighting planning method of the present invention can be applied to any space as long as the space is illuminated. In particular, a space where people often stay for most of the day. 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 facilities for long-distance operation (automobiles, railway vehicles, aircraft, ships, etc.), etc. It can be suitably applied to a space.

[0068]

As described above, according to the artificial lighting planning method according to the first aspect of the present invention, the first light source having a low color temperature is turned on during the calming period in the human biological rhythm, During the activation phase in human biological rhythms, a high color temperature second
Since the light source is turned on, it is possible to obtain an appropriate light environment according to the human biological rhythm.

The above method can provide a physiologically favorable 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 artificial lighting planning method of the second aspect of the present invention, the first light source is turned on at a low light emission level and the second light source is turned on at a high light emission level. It is more desirable to secure the amplitude of the biological rhythm, and thus a physiologically more favorable light environment can be obtained.

[Brief description of the drawings]

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

FIG. 2 is a schematic diagram showing a lighting fixture used in the artificial lighting planning method of FIG. 1;

FIG. 3 is a schematic view showing a switch of the lighting apparatus of FIG. 2;

FIG. 4 is a graph showing the effects of red light, green light and blue light on body temperature rhythm and melatonin rhythm at night.

FIG. 5 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. 6 is a graph showing the effect of red light, green light and blue light (1000 lx) on body temperature rhythm in the morning.

FIG. 7 is a graph showing the effect of red light, green light and blue light (2500 lx) on body temperature rhythm in the morning.

FIG. 8 is a graph showing the effect of red, green and blue light on morning melatonin rhythm.

FIG. 9 is a schematic diagram showing another example of a lighting schedule.

FIG. 10 is a schematic side view showing an example of an indirect lighting structure.

FIG. 11 is a side view showing another example of the light source.

FIG. 12 is a sectional view taken along line AA of FIG. 11;

FIG. 13 is a schematic view showing an example of a lighting device capable of continuously adjusting a color temperature.

FIG. 14 is a schematic plan view showing another example of a lighting fixture.

FIG. 15 is a schematic diagram showing another example of a lighting schedule.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 First light source of low color temperature 2 Second light source of high color temperature P1 Calming period in human biological rhythm P2 Activation period in human biological rhythm

Claims (2)

[Claims] 1. An artificial lighting planning method for artificially adjusting a light environment according to a human biological rhythm, wherein a first light source having a low color temperature is turned on during a calming period in the human biological rhythm. And turning on a second light source having a high color temperature during an activation period of the human biological rhythm. 2. The artificial lighting planning method according to claim 1, wherein the first light source is turned on at a low light emission level, and the second light source is turned on at a high light emission level.