JP6152734B2 - Lighting system - Google Patents

Description

  The present invention relates to an illumination system including an illumination device used in a neonatal specific intensive care unit for treating and raising a sick newborn and a control device for controlling lighting thereof.

  Conventionally, premature infants with a birth weight of 2500 g or less and newborns with diseases are treated and raised for a certain period of time in a neonatal specific intensive care unit (NICU (Neonatal Intensive Care Unit)). In particular, very premature infants with a birth weight of less than 1000 g and newborns with a lifelong respiratory function may be treated and raised in NICU for a relatively long period of time.

  In NICU, the lighting device in NICU is often lit all day so that doctors, nurses, etc. can always observe the state of the newborn and perform treatments as necessary. However, the absence of day / night distinction is undesirable for the healthy development of the newborn's biological clock and sleep-wake rhythm. In particular, for newborns treated and raised in NICU for a long period of time, their growth may be hindered.

  Therefore, during nighttime, the technology to maintain the biological clock and sleep wakefulness rhythm of the newborn by covering the incubator hood provided in the neonatal room such as NICU with a resin cover that can block light with a wavelength of 650 nm or less. It is known (see, for example, Patent Document 1). Since newborns cannot fully recognize light with a wavelength of 650 nm or more, covering the incubator with the hood as described above gives the newborn a dark state, and nurses observe the newborn's state. Can give a bright state to do.

  Also, a technique is known in which a dark state can be easily given to a newborn by providing a liquid crystal toning filter that blocks light having a wavelength of 620 nm or less in the incubator hood instead of the resin cover described above. (For example, refer to Patent Document 2).

Japanese Patent No. 4463177 JP 2010-17857 A

  However, when the resinous cover described in Patent Document 1 is used, it becomes difficult for nurses and the like to observe the newborn's complexion, and various devices are used when performing treatments such as infusion or oxygen inhalation. There is a possibility that the color of the object cannot be easily identified. In addition, for example, when a large number of newborns are accommodated in the NICU, manually attaching and detaching the resin cover to each incubator hood is a heavy burden on nurses and the like. On the other hand, the liquid crystal toning filter used in the incubator hood described in Patent Document 2 is expensive and cannot be easily introduced. Moreover, after a newborn baby has grown to a certain stage, treatment and childcare are often carried out on a crib placed in the NICU, not an incubator, and only in cases where the incubator is not used or only for a short period of time. There are many cases that cannot be done.

  The present invention solves the above-mentioned problems, can create a day and night environment required for the healthy growth of the newborn, and is suitable for the color of the appropriate visibility and equipment in the dark state for the newborn. It is an object of the present invention to provide an illumination system that can maintain identifiability.

  In order to solve the above problems, the present invention is an illumination system including an illumination device and a control device that controls lighting of the illumination device, and the illumination device has a low correlated color temperature of 2000 to 2500K. A low color temperature light source that emits color temperature light, the low color temperature light having a peak wavelength of radiation intensity in a wavelength range of 550 to 700 nm, and a radiation intensity in a wavelength range of 440 to 500 nm being the peak wavelength; The average color rendering index Ra is 60 or more, and the control device has a normal illuminance of 1 to 100 lx on the irradiated surface irradiated with light by the low color temperature light source. The lighting system is characterized by controlling lighting of the lighting device.

  In the illumination system, the illumination device further includes a white light source that emits white light having a correlated color temperature of 2500 K or more, and the control device has a normal illuminance on an irradiated surface irradiated with light from the white light source. It is preferable that the lighting device is controlled to be lighted so as to be 100 to 1000 lx.

  In the illumination system, it is preferable that the control device includes a switching unit for switching and lighting the low color temperature light source and the white light source of the illumination device.

  In the illumination system, it is preferable that the control device includes a timer for lighting a low color temperature light source and a white light source of the illumination device for a predetermined time set in advance.

  In the illumination system, the control device is configured to switch on and turn on the low color temperature light source and the white light source of the illumination device according to a preset time per day and with a preset illuminance. It is preferable to have.

  In the illumination system, the white light source includes a high color temperature light source that emits high color temperature light having a correlated color temperature of 4600 to 7100 K, and the high color temperature light has a radiation intensity in a wavelength range of 440 to 480 nm. It has a peak wavelength, the maximum radiant intensity of 480 to 520 nm is preferably 0.4 or more and less than 1.0 of the radiant intensity of the peak wavelength, and the average color rendering index Ra is preferably 80 or more.

  The illumination system includes a plurality of illumination devices, and the plurality of illumination devices includes an indirect illumination device that illuminates a space in which the illumination devices are arranged, and a direct illumination device that illuminates the irradiated surface, It is preferable that the color temperature light source is provided at least in the indirect illumination device.

  According to the present invention, rather than irradiating low color temperature light with a correlated color temperature of 2000 to 2500 K and an average color rendering index Ra of 60 or more at an illuminance of 1 to 100 lx, the newborn is recognized at night and in a dark state. It is possible to maintain visibility and color discrimination.

The one-point projection figure which shows the structure of the illumination system which concerns on the 1st Embodiment of this invention. The block block diagram of the illumination system. The figure which shows the spectral distribution of the light radiate | emitted from the illuminating device used for the illumination system. The figure which shows the relationship between the color temperature of illumination light, and the amount of biological effects. The time chart which shows the lighting control pattern of each light source in the illumination system. The block block diagram of the illumination system which concerns on the 2nd Embodiment of this invention. The figure which shows the spectral distribution of the light radiate | emitted from the illuminating device used for the illumination system. (A) (b) is a time chart which shows the lighting control pattern of each light source in the illumination system. (A) thru | or (c) is a side view which shows the lighting example in the example of application of each said illumination system, and the example of application. (A) thru | or (c) is a side view which shows the lighting pattern in the application example different from the above of each said illumination system, and the application example. (A) thru | or (c) is a side view which shows the lighting pattern in another example of application further different from the above of each said illumination system, and the example of application.

  An illumination system according to a first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the lighting system 1 includes a plurality of lighting devices 2 and a control device 3 for setting the lighting control content of the lighting device 2. In the present embodiment, the lighting system 1 will be described as being used for room lighting in a neonatal specific intensive care unit (NICU (Neonatal Intensive Care Unit)). In the NICU, a bed 10 and an incubator (not shown) for treating and raising a newborn are placed, and around the bed 20, various inspection devices for detecting heartbeat and respiration and medical instruments such as infusion are placed. . In addition, a medical hanger 20 is installed on the ceiling of the NICU to supply medical gas such as oxygen and power to various inspection devices to the newborn. In this example, a plurality of lighting devices 2 are incorporated in the medical hanger 20. Moreover, the control apparatus 3 is integrated in the light controller 30 of the illuminating device in NICU attached to the wall surface.

  The plurality of lighting devices 2 are the space in which they are arranged, in this example, the indirect lighting device 21 that illuminates the ceiling wall in the NICU, and the irradiated surface to which the light from the lighting device 2 is irradiated, in this example, And a direct illumination device 22 that illuminates the surroundings of the bed 10 and an incubator (not shown). The indirect lighting device 21 is provided on the upper surface of the medical hanger 20, and the direct lighting device 22 is provided on the lower surface of the medical hanger 20.

  In addition, each lighting device 2 uses at least two types of light sources having different characteristics of emitted light. In this embodiment, as shown in FIG. 2, the illumination device 2 includes a low color temperature light source 2L that emits light having a correlated color temperature of 2000 to 2500K, and a white light source that emits light having a correlated color temperature of 2500K or more. 2W. Both the low color temperature light source 2L and the white light source 2W may be incorporated in one lighting device 2, and each light source may be switched on and turned on. Only one of them may be incorporated, and two types of lighting devices 2 may be switched and turned on. The low color temperature light source 2L is provided at least on the indirect lighting device 21 (see FIG. 1) provided on the upper surface of the medical hanger 20, and uniformly irradiates the entire NICU with the low color temperature light so that the newborn can be treated. And the monitorability around the bed 10 to be grown is enhanced.

  As shown in FIG. 2, the control device 3 includes an operation unit 31 for a nurse or the like to operate the lighting state of each light source of the lighting device 2, a display unit 32 that displays the lighting state of each light source, and an input And a control unit 33 that controls the lighting state of each of the light sources according to the operated content. In addition, the control device 3 includes an output unit 34 that outputs a predetermined dimming signal to each of the light sources of the lighting device 2 and a timer 35 that times the lighting time of each light source.

  The operation unit 31 includes buttons and switches for selecting the lighting device 2 to be operated, faders, dials, buttons, and the like for adjusting their light control amounts, timer setting buttons, and the like. Moreover, the display part 32 has red LED, green LED, etc. which can identify the lighting state of each illuminating device 2 by luminescent color. Note that a liquid crystal screen incorporating a touch panel may be used for the operation unit 31 and the display unit 32. The control unit 33 includes a general-purpose CPU, a microcomputer, and the like, and drives the output unit 34 to output a predetermined dimming signal. The timer 35 may be incorporated in the control unit 33, or a general-purpose clock element may be used. A predetermined general-purpose switching element or the like is incorporated in the output unit 34, and a predetermined dimming signal is output to the lighting device 2 in accordance with an instruction from the control unit 33.

  The operation unit 31 of the control device 3 is provided with a mode switching button. In the present embodiment, the lighting system 1 switches on the two modes, the night mode and the daytime mode, and turns on the lighting device 2. Specifically, the low color temperature light source 2L of the lighting device 2 is turned on in the night mode, and the white light source 2W is turned on in the day mode.

  As shown in FIG. 3, the low color temperature light L emitted from the low color temperature light L (solid line) has a peak wavelength of spectral radiation in the wavelength range of 550 to 700 nm, and the spectral radiation in the wavelength range of 440 to 500 nm. Is 1/5 or less of the peak wavelength. Preferably, the low color temperature light L has a peak wavelength of spectral radiation in the wavelength region of 600 to 700 nm, and the spectral radiation in the wavelength region of 440 to 500 nm is 1/10 or less of the peak wavelength. At this time, the average color rendering index Ra is set to be 60 or more. As the low color temperature light source 2L, an LED light source in which a blue LED chip is coated with a phosphor that converts the wavelength of blue light into a predetermined wavelength is preferably used. A fluorescent lamp, an organic EL element, or the like may be used.

  Further, the white light W (dashed line) emitted from the white light source 2W is not limited to the illustrated example, but the average color rendering index Ra is set to be 60 or more. The white light source 2W emits light of a light color higher in color temperature than the low color temperature light source 2L. The term “white” as used herein preferably includes a range defined as a white color classified by the light source color and color rendering of fluorescent lamps and LEDs in JIS Z 9112, but includes a color temperature range higher than that. May be. The white light source 2W is preferably an LED light source or an LED light source or fluorescent light configured to obtain the above-described spectral characteristics, but may be a light source other than those described above.

  Next, the operation of the illumination system 1 will be described. First, a user such as a nurse operates the control device 3 to turn on the lighting device 2 in the daytime mode. At this time, the control device 3 controls the lighting of the white light source 2W so that the normal illuminance on the irradiated surface irradiated with light by the white light source 2W becomes 100 to 1000 lx. 100 lux or higher means JIS C 9110 lighting standard general rules. Is the illuminance of a hospital room in a health care facility, which is considered to be the minimum necessary for the daytime environment. Moreover, 1000 lx or less is the illuminance of the treatment room of the health care facility in the above lighting standard general rule, and is considered to be sufficient for daytime environments.

  Then, a user such as a nurse operates the control device 3 to turn on the lighting device 2 in the night mode. At this time, the control device 3 controls the lighting of the low color temperature light source 2L so that the normal illuminance on the irradiated surface irradiated with light by the low color temperature light source 2L is 1 to 100 lx. 1 lux or more is the illuminance defined as the minimum illuminance of emergency lighting by the Building Standard Law, and is the illuminance considered to be the minimum necessary for viewing. 100 lux or less is the illuminance of the general lighting of NICU of the Japan Medical Welfare Equipment Association Standard “Hospital Equipment Design Guidelines”, and is considered to be sufficient for viewing. In addition, the average color rendering index Ra of the low color temperature light source 2L is 60 or more, and this is based on JIS C 9110 illumination standard general rules. In basic lighting requirement No. 1 (indoor work), this is a value required for normal visual work, and is a value considered to be a minimum necessary for color recognition.

  Further, as described above, the low color temperature light source 2L emits light having a correlated color temperature of 2000 to 2500K. 2000K or higher corresponds to the color temperature of sunset, and is the minimum value of the color temperature of natural light. Moreover, 2500K or less is sufficient illuminance necessary for viewing. As shown in FIG. 4, the color temperature 2500K is a color temperature at which the amount of biological action when illuminance of 100 lux is secured is equivalent to that when white light (color temperature 5000K) is 20 lux. The amount of biological action referred to here is the amount of stimulation to melanopsin ganglion cells (ipRGC). Even if the illumination light has the same illuminance, the amount of biological action is relatively high at a high color temperature, and the amount of biological action is relatively low at a low color temperature. In addition, white light 20lux is the nighttime illumination intensity of NICU of the Japan Medical Welfare Equipment Association Standard “Hospital Equipment Design Guidelines”, and it was set as the nighttime illumination intensity in the facilities that introduced the light-dark cycle in past research cases. If the illuminance is below this level, the effect on the newborn is considered to be small (for example, Mio Ozawa: Literature review on the effect of the light environment of NICU and GCU on preterm infants, Journal of the Japan Society for Neonatal Nursing) Vvol.13, No.3, 2007).

  That is, in the night mode, for example, if the correlated color temperature is 2300 K and the illuminance is 100 lux, the newborn baby on the irradiated surface of the lighting device 2 does not notice the lighting of the lighting device 2 (low color temperature light source 2L) and Recognize that On the other hand, since the necessary monitorability is ensured at this time, a nurse or the like can monitor the face color of the newborn. Further, since the average color rendering index Ra of the low color temperature light source 2L is 60 or more, for example, a nurse or the like can safely perform necessary measures such as distinguishing the color of equipment such as an infusion tube. In the daytime mode, if the white light source 2W is turned on at 100 lux or more, the newborn baby recognizes that it is daytime, and sufficient monitoring performance can be obtained for nurses and the like. As described above, according to the lighting system 1 of the present embodiment, it is possible to create a day and night environment required for the healthy growth of the newborn, and for appropriate visibility and equipment in the dark state for the newborn. The color discrimination can be maintained.

  Switching between the night mode and the daytime mode may be performed by a nurse or the like operating the control device 3 as necessary, but a timer of the control device 3 may be used. For example, as shown in FIG. 5, a white light source (for example, 4000 K, 500 lux) and a low color temperature light source (for example, 2300 K, 100 lux) may be set to automatically switch when a certain time elapses. In this way, it is possible to reduce the labor of nurses and the like.

  Next, an illumination system according to a second embodiment of the present invention will be described with reference to FIG. As shown in FIG. 6, in the illumination system 1 of the present embodiment, the illumination device 2 further includes a high color temperature light source 2H that emits light having a correlated color temperature of 4600 to 7100K. Further, the lighting device 2 includes a medium color temperature light source 2M that emits light having a correlated color temperature of 2500 to 4600K, which is an intermediate temperature zone between the low color temperature light source 2L and the high color temperature light source 2H. The high color temperature light source 2H and the medium color temperature light source 2M cover the color temperature band of the emitted light of the white light source 2W in the above embodiment. Moreover, the control apparatus 3 has a schedule setting part for switching and lighting each light source according to a preset time per day and with a preset illuminance. The schedule setting unit mainly includes a memory 36 that stores setting data of each light source. The memory 36 may be a general-purpose EEPROM or the like and may be incorporated in the control unit 33.

  As shown in FIG. 7, the high color temperature light (one-dot chain line) emitted from the high color temperature light source 2H has a peak wavelength of spectral radiation in the wavelength region of 440 to 480 nm, and the maximum intensity of 480 to 520 nm is the above. The peak wavelength is 0.4 or more and less than 1.0. Further, the average color rendering index Ra at this time is set to be 80 or more. As the high color temperature light source 2H, an LED light source in which a blue LED chip is coated with a phosphor that converts the wavelength of blue light into a predetermined wavelength is preferably used. A lamp, an organic EL element, etc. may be sufficient.

  Correlated color temperature 4600-7100K is a range defined in JIS Z 9112 as daylight color and daylight of the light source color and color rendering properties of fluorescent lamps and LEDs, and is closest to daylight incident from a daytime window Color temperature. In addition, the average color rendering index Ra80 or more is the illumination standard general rule. It is Ra of a medical room in a health care facility, and is a value considered to be the minimum necessary for the daytime environment. In addition, the medium color temperature light source 2M emits light of a light color in a range defined as warm white, white, and daylight white, similarly to the white light source illustrated in FIG.

  In the illumination system 1 of the present embodiment, as shown in FIG. 8A, for example, the illuminance of the high color temperature light source 2H is increased during the time period 9 to 12 am in which people are most active, The color temperature light source 2M and the low color temperature light source 2L are sequentially turned on. The light emitted from the high color temperature light source 2H has a peak wavelength of spectral radiation in the wavelength range of 440 to 480 nm, and the maximum intensity of 480 to 520 nm is not less than 0.4 and less than 1.0 of the peak wavelength, It has the effect of improving human awakening and activity, and can make newborns more strongly recognize that it is daytime.

  Further, the illuminance by a light source having a certain color temperature may be changed stepwise by schedule setting. For example, as shown in FIG. 8B, the illuminance of the low color temperature light source 2L may be reduced stepwise. For example, even after the evening, the illuminance of the low color temperature light source 2L is relatively high during the time period in which the work of the nurse or the like is expected to increase, and the illuminance of the low color temperature light source 2L is late at night when the work is rare. Can be used as a night light, with a minimum value capable of maintaining monitoring.

  As shown in FIG. 1, in the illuminating device 2 of the said embodiment, the direct illuminating device 22 provided in the lower surface of the medical hanger 20 irradiates light toward a newborn at daytime or a medical examination. On the other hand, since the indirect lighting device 21 is assumed to be used at night, the low color temperature light source 2 </ b> L is used at least for the indirect lighting device 21, but may be used for the direct lighting device 22. In addition, when the low color temperature light source 2L is used for the direct illumination device 22, the light emission output is set lower than that of the indirect illumination device 21 so that the newborn can hardly feel dazzling.

  Moreover, the illuminating device 2 is not restricted to the structure integrated in the medical hanger 20, but is used also as an individual illuminating device. For example, the lighting device 2 may be a ceiling-suspended lighting fixture 2a shown in FIG. As with the medical hanger 20, the lighting fixture 2a has indirect illumination on the upper surface and direct illumination on the lower surface. As a specific example of use of the lighting fixture 2a, as shown in FIG. 9A, it is possible to uniformly illuminate the nighttime NICU with light suitable for a newborn by indirect lighting and reduce glare. . Moreover, as shown in FIG.9 (b), while irradiating space by direct illumination and providing appropriate brightness around the bed 10 (incubator), a uniformity can be improved by indirect illumination. Moreover, as shown in FIG.9 (c), only direct illumination can be used at the time of a daytime or a medical examination. In addition, as shown to Fig.10 (a) thru | or (c), direct illumination and indirect illumination are separate bodies, such as direct illumination is the ceiling-mounted fixture 2b, and indirect illumination is hanging or wall-mounted fixture 2c. There may be. Moreover, as shown to Fig.11 (a) thru | or (c), the illuminating device 2 may be a portable stand lighting fixture 2d.

  The present invention is not limited to the above embodiment, and various modifications can be made. In the above-described embodiment, the lighting system for NICU has been described. However, it is necessary for an adult patient or the like to maintain the biological rhythm for an adult patient or the like. Therefore, the portable stand lighting device 2d as shown in FIG. 11 can be suitably used, for example, in a general hospital room or an intensive care room where sunlight (ultraviolet rays) is avoided.

DESCRIPTION OF SYMBOLS 1 Illumination system 2 Illumination device 21 Indirect illumination device 22 Direct illumination device 2H High color temperature light source 2L Low color temperature light source 2W White light source 3 Control device 31 Operation part (switching part)
35 Timer 36 Memory (Schedule setting part)
H High color temperature light L Low color temperature light W White light

Claims (7)

An illumination system comprising: an illumination device; and a control device that controls lighting of the illumination device,
The illumination device includes a low color temperature light source that emits low color temperature light having a correlated color temperature of 2000 to 2500K.
The low color temperature light has a peak wavelength of radiant intensity in a wavelength region of 550 to 700 nm, a radiant intensity in a wavelength region of 440 to 500 nm is 1/5 or less of the radiant intensity of the peak wavelength, and average color rendering evaluation The number Ra is 60 or more,
The control system controls the lighting of the lighting device so that a normal illuminance on an irradiated surface irradiated with light from the low color temperature light source is 1 to 100 lx. The lighting device further includes a white light source that emits white light having a correlated color temperature of 2500 K or more,
The lighting system according to claim 1, wherein the control device controls the lighting of the lighting device so that a normal illuminance on an irradiated surface irradiated with light from the white light source is 100 to 1000 lx.   The lighting system according to claim 2, wherein the control device includes a switching unit for switching and lighting a low color temperature light source and a white light source of the lighting device.   4. The illumination system according to claim 2, wherein the control device includes a timer for lighting a low color temperature light source and a white light source of the illumination device for a predetermined time set in advance.   The control device includes a schedule setting unit for switching on and turning on the low color temperature light source and the white light source of the lighting device according to a preset time per day and with a preset illuminance. The illumination system according to any one of claims 2 to 4. The white light source includes a high color temperature light source that emits high color temperature light having a correlated color temperature of 4600 to 7100K,
The high color temperature light has a peak wavelength of radiation intensity in a wavelength region of 440 to 480 nm, a maximum radiation intensity of 480 to 520 nm is 0.4 or more and less than 1.0 of the radiation intensity of the peak wavelength, and 6. The lighting system according to claim 2, wherein the average color rendering index Ra is 80 or more. A plurality of lighting devices,
The plurality of illumination devices include an indirect illumination device that illuminates a space in which they are arranged, and a direct illumination device that illuminates the illuminated surface,
The illumination system according to any one of claims 1 to 6, wherein the low color temperature light source is provided at least in the indirect illumination device.