JP2001025511A - Radiation energy irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to embody an always healthy vital state regardless of the living environment by imparting the irradiation (more particularly radiation of red color to near IR wavelength regions) of light (radiation energy) to maintain and promote the vital functions to a living body without a specified consciousness is a daily life. SOLUTION: The radiation energy irradiation device has a means for irradiating the living body with illumination light for illumination including the radiation of a visible wavelength region and the radiation of the prescribed wavelength region for maintaining and promoting the vital function by penetrating the inside of the living body. For example, the prescribed wavelength region is in a range from 600 to 1100 nm. The immune power of the living body may be intensified and the autonomic nerves may be activated by the radiation of such prescribed wavelength region, by which the vital functions may be maintained and promoted. The radiation means for radiation of the visible wavelength region and the radiation means for radiation of the prescribed wavelength region may be integrated or at least either of the radiation means for radiation of the visible wavelength region and the radiation means for radiation of the prescribed wavelength region may be independently disposed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of irradiating light (radiant energy) for realizing the irradiation of light (radiant energy) that can unconsciously maintain and enhance a living body's biological functions in daily life. And an irradiation device.

Further, the present invention relates to a light (radiant energy) irradiating device which functions as a lighting device having a general lighting function in addition to the light (radiant energy) irradiating function as described above. Further, the present invention provides a display device having an image display function (display function) in addition to the light (radiant energy) irradiation function as described above (for example, a television image display device, a computer display device, a game display device, and the like). And a light (radiant energy) irradiating device that functions as a display device represented by

[0003]

2. Description of the Related Art In recent years, the social environment surrounding us has been affected by stress factors such as the deterioration of the living environment, including the presence of substances related to endocrine disruption, an increase in commuting distance, a feeling of fatigue due to intensified market competition, and a flood of information. Is growing. This effect not only affects humans, but also affects other organisms such as pets and livestock.
It causes disorders in biological functions, such as reduced immunity and autonomic dysfunction. Therefore, there is a need for a means for maintaining and enhancing biological functions in an environment where humans and other living organisms are placed.

[0004] Living organisms have originally maintained their biological functions under sunlight. For this reason, there is an idea that the biological function can be maintained and enhanced by light irradiation, and it has long been said that daylight is necessary for human health. In particular, if near-infrared radiation having a penetrating effect on a living body can effectively stimulate a living body part related to an autonomous function, a secretory function, and an immune function, regulation of a biological function can be promoted from the outside.

[0005] However, fluorescent lamps are widely used as general home lighting and office lighting in order to improve their efficiency. On the other hand, in recent years, the living environment of workers has been forced to live less with the opportunity to be exposed to the sunshine due to the fact that their workplaces have moved underground or above high-rise buildings in addition to commuting over long distances. In addition, even in the life of ordinary people, in the rainy season (during the rainy season) or in high-latitude regions in winter, the opportunity to be exposed to the sun may be reduced.

[0006] On the other hand, in general, when watching a television image, watching a television image, performing a business using a display device of a computer or an information device, or playing a TV game using the display device for a long time, only eye fatigue occurs. But not mental stress. It is known that such stress causes not only mental fatigue but also a decrease in biological functions including immunity (Reference 1: Research Report on the Research Foundation for Traffic and Prevention Medicine, Effects of driving and short-distance driving on α-wave and NK cell activity ”, 1995).

[0007] In connection with the above, in recent studies, it has been reported that red light enhances NK (Natural Killer) cell activity which is an immunity (Reference 2: 19th Nippon Kogaku Medical and Photobiology). Academic Society, B7-43, "Study on the effect of red light-emitting diode light irradiation on the forehead on NK cell activity", 1997, Reference 3: JP-A-9-84888.
No., "Non-invasive method for enhancing immune monitoring ability and forehead pulsed light irradiation tool"). It is said that this phenomenon may be due to the fact that red light reaching deep inside the living body stimulates a site related to immune functions such as the hypothalamus of the head.

NK cells are cells that play an important role in the immune system and are important cells that attack and kill cancer cells and viruses. However, mental and physical stress and aging reduce the amount and activity of NK cells, which leads to tumor development and viral infection. Therefore,
In daily life, maintenance and promotion of NK cell activity has become an important issue.

[0009] In particular, immunity can be more improved under illumination light containing a large amount of red and near-infrared radiation, such as sunlight, than in a living environment only under fluorescent lighting, which does not contain them. I can guess. Conversely, without taking the sun,
In addition, when living under fluorescent lighting with little red and near-infrared radiation, a long-term decrease in NK cell activity is expected. For example, the life of an elderly person who stays in a room and watches TV all day long, office work indoors using a computer for a long time, or a TV game has many adverse effects from the viewpoint of reducing immunity.

[0010]

FIG. 1 shows, as light sources generally used, (a) a three-wavelength-range daylight fluorescent lamp, (b) a white fluorescent lamp, (c) a 60 W silica light bulb, and (D) A light emitting diode (LED) having the same kind of emission peak wavelength as 660 nm used in Reference 2.
The spectral distribution (distribution of relative spectral radiant energy with respect to wavelength) is shown for each of. Further, Table 1 shows the illuminance (unit: lux) necessary for the irradiance of 635 nm or more to the forehead of the subject to be equal to the value in Literature 1, that is, obtained by the LED in Literature 1. Illuminance (unit: lux) necessary to obtain an equivalent NK cell activity is shown for each of the above four types of light sources. Specifically, Table 1 shows the irradiance of each light source in the wavelength range of 635 nm to 1000 nm, and the NK cell activity equivalent to that obtained by irradiation for 30 minutes at an illuminance of 80 lx by an LED having an emission peak wavelength of 660 nm. The illuminance required to obtain with 30 minutes of illumination is shown for each light source. Note that the wavelength of 635 nm corresponds to the emission peak wavelength of 6
This is the half-value wavelength of the LED of 60 nm.

[0011]

[Table 1]

As shown in FIG. 1, the fluorescent lamp of either the daylight type or the white type has a wavelength of 700 nm.
It has almost no emission of nm or more, and does not provide emission in the red and near-infrared regions that provides the above-described favorable effects.
The illuminance of the work surface (on the desk) under office lighting with fluorescent lamp illumination is generally about 1000 lux, but as can be seen from Table 1, the same effect of illumination in the red and near infrared regions as the LED (NK) In order to obtain (cell activation) by fluorescent light irradiation, an illuminance of about twice or more of the value in the general office lighting described above is required.

On the other hand, a silica light bulb (incandescent light bulb), as shown in FIG.
The same effect of NK cell activity as ED can be obtained.
However, the silica bulb is disadvantageous in terms of power saving due to poor efficiency (illuminance / input power), and has an undesirable effect in terms of heat radiation.

Further, in Reference 3, an LED having a wavelength of 660 nm is used.
It has been reported that when irradiating the light as pulse light of 0.5 Hz to 13 Hz for the purpose of inducing an α wave, the enhancement of NK cell activity becomes more remarkable. The device configuration disclosed in Document 3 assumes that the device acts as a therapeutic device. In that case, since the person to be irradiated has closed his eyes, the device is irradiated with the red blinking light as described above. No problem. However, if the principle (irradiation of red blinking light) is applied to a general lighting device, the above-mentioned blinking frequency in the red region is extremely unpleasant for a person who lives or works under the lighting, and causes epilepsy. There is a risk of triggering.

As described above, with the conventional lighting technology, it is not possible to obtain a light source instead of daylight that can sufficiently provide radiation in the red and near-infrared regions effective for maintaining and enhancing immunity. . It is also conceivable to arrange a light source around the display unit (screen) of the display device in order to obtain sufficient emission in the red and near infrared regions. This is unfavorable because it causes a person to feel glare and cause discomfort, and the workability is further deteriorated.

[0016] As described above, in the prior art, NK cells cannot be sufficiently exposed to daylight, and people who work on a TV or work on a display for a long time under artificial lighting are required to obtain NK cells. The activity cannot be maintained or improved. Therefore, in the prior art, a practical light (radiant energy) irradiation method and irradiation device that can maintain and enhance biological functions such as an immune function and an autonomous function, which are required in a stressful social environment, are required. I can't get it.

The present invention has been made in order to solve the above-mentioned problems, and has an object to (1) irradiate light (radiant energy) to maintain and enhance biological functions (particularly,
Irradiation in the red to near-infrared wavelength range) is given to the living body without any particular awareness in daily life, so that a healthier living state can be realized regardless of the living environment. (2) To provide an irradiation device and an irradiation method for (radiant energy); (2) light (radiant energy) that functions as a lighting device having a general lighting function in addition to the light (radiant energy) irradiation function as described above; And (3) functioning as a display device having an image display function (display function) in addition to the light (radiant energy) irradiation function as described above, and providing the display for a long time. An object of the present invention is to provide a light (radiant energy) irradiation device capable of maintaining and improving the biological functions of a living body.

[0018]

SUMMARY OF THE INVENTION A radiant energy irradiating apparatus according to the present invention is an illumination light for illumination including radiation in a visible wavelength range and radiation in a predetermined wavelength range that penetrates into a living body to maintain and enhance biological functions. A radiant energy irradiating device provided with a means for irradiating light, whereby the above object is achieved.

Preferably, the predetermined wavelength range is 600 n
m to 1100 nm.

For example, the radiation in the predetermined wavelength range can enhance the immunity of a living body to maintain and enhance the biological function.

Further, the radiation in the predetermined wavelength range can activate the autonomic nervous system to maintain and enhance the biological function.

The radiating means for radiation in the visible wavelength range and the radiating means for radiation in the predetermined wavelength range may be integrated.

Alternatively, at least one of the radiating means for radiation in the visible wavelength range and the radiating means for radiation in the predetermined wavelength range may be independently provided.

Preferably, the irradiance in the wavelength range of 600 nm to 1100 nm is 0.1 W / m ² or more on the surface to be illuminated by the illumination light.

Preferably, the radiation in the predetermined wavelength range is 6
Radiation in the range of 00 nm to 1100 nm;
radiation in the range of nm to 1100 nm is 0.5 to 13 Hz
The pulse is modulated and irradiated.

Preferably, on the surface to be illuminated by the illumination light, the wavelength is from 600 nm to 1100 nm.
Is at least 15% of the radiant energy of radiation in the visible wavelength range from 380 nm to 780 nm.

Preferably, the wavelength is from 600 nm to 1100.
The radiation efficiency of radiation in the range of nm is not less than 0.001 W / lm.

Preferably, on the surface to be illuminated by the illumination light, a wavelength of 1100 nm to 2.5 μm
Is smaller than the radiant energy of radiation in the wavelength range of 600 nm to 1100 nm.

[0029] Preferably, the illumination light has a light color that does not cause discomfort, and the International Commission on Illumination (CIE) 1
The deviation (duv) of the chromaticity in the visible wavelength range from the blackbody radiation locus on the 960 UCS chromaticity diagram is within ± 0.01.

The radiant energy irradiation apparatus according to the present invention as described above includes a discharge lamp, a fluorescent discharge lamp, an incandescent lamp,
Alternatively, it may have a configuration as a light source including a solid state light emitting element.

Another radiant energy irradiation apparatus of the present invention is as follows.
A radiant energy irradiating device comprising means for irradiating radiation in a predetermined wavelength range that has low human visibility and penetrates deeply into a living body to maintain and enhance biological functions, thereby achieving the above-described object. Achieved.

Preferably, the predetermined wavelength range is 600 n
m to 1100 nm.

For example, the radiation in the predetermined wavelength range can enhance the immunity of a living body to maintain and enhance the biological function.

Further, the radiation in the predetermined wavelength range can activate the autonomic nervous system to maintain and enhance the biological function.

Preferably, the irradiance in the wavelength range of 700 nm to 1100 nm is 0.03 W / m ² or more on the surface to be irradiated by the radiation.

Preferably, the radiation in the predetermined wavelength range is 7
Radiation in the range of 00 nm to 1100 nm,
radiation in the range of nm to 1100 nm is 0.5 to 13 Hz
The pulse is modulated and irradiated.

Preferably, on the surface to be illuminated by the radiation, the radiant energy of the radiation having a wavelength in the range of 1100 nm to 2.5 μm is changed from a wavelength of 700 nm to 1
Less than the radiant energy of radiation in the range of 100 nm.

The radiant energy irradiation apparatus according to the present invention as described above includes a discharge lamp, a fluorescent discharge lamp, an incandescent lamp,
Alternatively, it may have a configuration as a light source including a solid state light emitting element.

The radiant energy irradiation device according to the present invention as described above may have an illumination function of supplying illumination light for illumination.

Alternatively, the radiant energy irradiation apparatus according to the present invention as described above may have a display function of displaying a predetermined image. In this case, for example, the predetermined image may be displayed by means for irradiating the radiation in the predetermined wavelength range. Alternatively, display means for displaying the predetermined image may be further provided, and means for irradiating radiation in the predetermined wavelength range may be attached to the display means.

[0041]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to achieve the present invention, the present inventors have found that the autonomous function of a living body can be switched between under illumination light containing near-infrared radiation and under illumination light not containing near-infrared radiation. And the differences in secretory function were experimentally investigated. Hereinafter, prior to the description of specific embodiments of the present invention, the contents of experimental results performed by the inventor will be described.

Illumination light containing near-infrared radiation (hereinafter referred to as "illumination light IL + TR") was created by an incandescent lamp. However, in order to prevent the thermal effect of far-infrared radiation contained in the incandescent lamp from affecting the living body, the incandescent lamp illumination light (IL) was passed through a heat ray absorbing filter (TR). On the other hand, illumination light that does not include near-infrared radiation (hereinafter, referred to as “illumination light FL”)
It was created by a fluorescent lamp that can provide illumination light of the same light color as illumination light including near infrared radiation (illumination light IL + TR).
FIG. 2 shows the spectral distribution of these test illumination lights (distribution of relative spectral radiant energy with respect to wavelength).

The illuminance is determined by the illumination light FL and the illumination light IL + TR.
In each case, the head was set to be approximately 200 lux when irradiated to the subject. This value is in the range of 150 to 300 lux, which is a recommended illuminance for performing an act of gathering and entertainment in a living room in Japanese Industrial Standards (JIS) Z9110 "illuminance standard".

Switching between the illumination light IL + TR and the illumination light FL was performed by exchanging the light source in the illumination equipment installed in the laboratory. That is, by setting the ambient light environment as well as the illuminance and light color between the illumination lights to be tested, the influence on the biological function due to the presence or absence of near-infrared radiation can be extracted.

The subjects were eight men in their twenties to fifties. Each subject wears clothes with exposed head and is illuminated with a fluorescent light (not the illumination light to be tested, but the light color is the same as the illumination light FL and does not include near-infrared radiation) After sitting in a sitting position and resting for a while in a sitting position, the subject's blood pressure (systolic blood pressure), heart rate, blood noradrenaline concentration, blood cortisol concentration, and NK cell activity were measured. After the measurement, the fluorescent lamp illumination light is turned off, and the subject is exposed to any test illumination light (illumination light IL + TR or illumination light FL).
And allowed to rest in a sitting position for 30 minutes under the test illumination. After 30 minutes, the subject's heart rate, blood pressure (systolic blood pressure), blood noradrenaline concentration,
Blood cortisol concentration and NK cell activity were measured.

The above procedure is repeated for different test illumination light, and the measurement is repeated by repeating the experiment with the same subject. The difference between the measured values before and after the irradiation of each test illumination light is the test illumination. Statistical analysis was performed on how they differed by light. Table 2 shows the results.

[0047]

[Table 2]

From Table 2, there is no significant difference in heart rate and blood pressure (systolic blood pressure) before and after exposure under the illumination light FL. However, under illumination light IL + TR, heart rate and blood pressure (systolic blood pressure) were significantly reduced after exposure. The blood noradrenaline concentration decreased after exposure to both the illumination light IL + TR and the illumination light FL, and decreased slightly but more significantly after irradiation with the illumination light IL + TR than after irradiation with the illumination light FL. The blood cortisol concentration is determined by the illumination light IL.
+ TR and decreased after exposure to both illumination light FL,
The magnitude of the drop was not significantly different due to the difference in illumination light. Further, the NK cell activity decreases after exposure to both the illumination light IL + TR and the illumination light FL, and the NK cell activity decreases.
The value after the irradiation was slightly higher than that after the irradiation with the illumination light FL.

As described above, the decrease in blood pressure and heart rate after exposure to the illumination light IL + TR suggests that parasympathetic nerve was activated by near-infrared radiation. In addition, although blood noradrenaline has the effect of increasing the heart rate, the large decrease after exposure to illumination light IL + TR corresponds to the fact that the increase in heart rate was suppressed by irradiation with illumination light IL + TR.

The blood cortisol concentration is secreted as the stress increases. There was no difference in the blood cortisol concentration after exposure between the two test lights, suggesting that the test was appropriate without the effects of stress due to tasks etc. between the two test lights. . Furthermore, the NK cell activity was higher for the illumination light IL + TR, indicating that near-infrared radiation has an effect of improving immunity.

Thus, near-infrared radiation improves immunity,
It is useful for maintaining and promoting biological functions such as activation of autonomous functions and regulation of secretory functions, and has the effect of increasing NK cell activity of a living body.

FIG. 3 shows an example of a spectral distribution of a three-wavelength band fluorescent lamp (neutral white) and a white fluorescent lamp as an example of a light source widely used in offices and houses as a general illumination light source. As shown in FIG. 3, none of the fluorescent lamps emits light having a wavelength of 635 nm or more.

The illuminance required to make the irradiance having a wavelength of 635 nm or more equal to the irradiance equivalent to the illumination light IL + TR is 3400 lux for the three-wavelength band fluorescent lamp illumination light and 2700 lux for the white fluorescent lamp illumination light. is there. That is, the illuminance needs to be several times the recommended value (750 to 1500 lux) of the work surface illuminance with office lighting in JIS Z 9110. However, in residential lighting, the illuminance is too high, causing undesirable effects such as discomfort due to glare and the like, and is unacceptable.

On the other hand, the incandescent light bulb (silica light bulb) is a component of the illumination light IL + TR and sufficiently emits 635 nm or more radiation corresponding to the red to near-infrared region as described with reference to FIG. Have. However, as described above, in the incandescent light bulb, energy saving cannot be realized due to poor luminous efficiency (illuminance / input power) or an increase in cooling load due to heat generation. In addition, in the incandescent light bulb, the heat generated by far-infrared radiation in the range of 1100 nm to 2.5 μm may increase the stress on the living body, which has a negative effect on the maintenance and enhancement of the living body function. Sometimes.

As described above, according to the experiment of the inventor, the red light and the near-infrared radiation in the wavelength range of 635 nm to 1100 nm irradiated on the head penetrate the living body and affect the immune function and autonomous function of the head. Stimulate the affected area. Thereby, the biological function is maintained and enhanced, and the NK cell activity of the living body is improved.

Here, the living body is covered with water having absorption characteristics for wavelengths as shown in FIG. 4 and hemoglobin in blood. Therefore, the absorption by water and hemoglobin is small from 700 nm to 1100.
Radiation in the nm range (wavelength range that functions as a "window of a living organism"), in particular, penetrates more efficiently into the body and stimulates the hypothalamus of the head. Further, the radiation in the infrared wavelength range corresponding to the window of the living body is hardly noticeable to the eyes. When the light in the visible wavelength range is modulated to around 10 Hz shown in Reference 3, an unpleasant flicker that induces tencan etc. is felt. On the other hand, the emission light of the light source in this infrared wavelength range is shown in Reference 3. Even if the frequency is modulated to around 10 Hz, the unpleasant flicker as described above does not occur.

Therefore, in the present invention, in a conventional discharge lamp, a fluorescent lamp, or an illuminating device (light irradiation device) using them as a light source, the original light emission spectrum of the light source itself (radiation in the visible wavelength range) is applied to the light source. In addition, by giving the emission of the wavelength components in the red to near-infrared region that produces the above-mentioned effects, a person engaged in life or work under the illumination realizes sufficient NK cell activity. Can be fully exposed to radiation.

Further, instead of having the light source itself emit radiation of the above-mentioned wavelength components in the red to near-infrared region, the light source (radiation source) for the original emission spectrum (emission in the visible wavelength region)
A configuration in which a separate radiation source having a wavelength spectrum in the red to near-infrared region described above may be added. At this time, a light source (radiation source) for radiation in the visible wavelength range and a light source (radiation source) for radiation in the red to near-infrared range are arranged, for example, on a wall in a room and a wall facing the room. Alternatively, the same effect can be obtained by arranging one wall near the ceiling of the room and the wall facing the other.

In any of the above-described configurations, the use of the light (radiant energy) irradiation apparatus and irradiation method of the present invention makes it possible to emit radiation in a wavelength range capable of maintaining and improving biological functions in daily life. It can be given to a living body, and can maintain and improve biological functions such as enhancement of immunity and activation of autonomic nerves, and can maintain and improve NK cell activity. In particular, the light (radiant energy) irradiation device of the present invention
It can be configured as a general lighting device. By providing the lighting device configured in this way, for example, maintenance / improvement of a biological function of a person who is forced to live or work for a long time under artificial lighting and cannot sufficiently receive daylight is provided. NK cell activity can be maintained or improved, or a sufficient amount of irradiation can always be given without being affected by weather, regionality, season, or the like. Thus, according to the present invention, irrespective of the living environment, the maintenance and improvement of the biological function and the maintenance of the NK cell activity by the irradiation of light (radiant energy) are always carried out unconsciously in daily life. Improvements can be realized.

Alternatively, it is of course possible to configure the light (radiant energy) irradiation device to function as the treatment device of the present invention.

As will be described later in detail, the light source according to the present invention may emit an alternating current or a pulse wave having a frequency of 0.5 Hz to 13 Hz.

Further, the light (radiant energy) irradiation device of the present invention may be further provided with an image display function (display function) so as to function as a display device. For example, if a light source (light irradiation device) according to the present invention is arranged around a screen (display unit) of a display device such as a conventional TV or a computer display device,
While watching a television or working on a display, the viewer or the worker efficiently irradiates the face with red to near-infrared light in a state where the viewer orientes his / her face close to the screen to watch TV or OA.
(Office Automation) It is possible to maintain and improve NK cell activity in the body of a person who goes to the display for a long time in work or the like. In addition, the light source (light irradiation device) of the present invention around the screen of the display device
May be located on the display unit (screen) of the display device, or may be other components, for example, around the frame of the display device or around the screen (display unit). Also, for example, a CRT of a display
As a part of the phosphor on the screen, a phosphor having an emission spectrum at a wavelength of 700 nm or more is applied to maintain biological functions.
The emission control may be performed by adding a signal for irradiating the light to be enhanced to a video signal and emitting light by adding a spectrum in the above wavelength range of 700 nm to 1100 nm to the light emitted from the display screen by a technique such as emitting light. .

Here, it is desirable that the upper limit of the radiation wavelength range is 1100 nm or less, which is the upper limit of the “biological window” shown in FIG. If the illuminating light contains far-infrared radiation having a wavelength exceeding 1100 nm, the thermal action of the far-infrared radiation (thermal action caused by light absorption by moisture in the body) causes stress in the living body, Therefore, the effect of maintaining / promoting the biological function may decrease. In this regard, the inventors experimentally confirmed that a light source that does not include radiation of 1100 nm or more has a greater effect of lowering the heart rate than a light source that includes radiation in the wavelength range of 1100 nm to 2.5 μm. did. From this, the radiant energy in the wavelength range of 1100 nm to 2.5 μm is reduced to at least the wavelength range of 600 nm having the effect.
By making the radiant energy smaller than the range of 1100 nm to 1100 nm, the effect of maintaining and improving the biological function is ensured.

On the other hand, the lower limit of the emission wavelength range that exhibits a favorable effect on the maintenance / enhancement of biological functions is, in principle, 60
0 nm. As shown in FIG. 4, for wavelengths smaller than 600 nm, absorption by hemoglobin is large, and effective irradiation cannot be expected. Further, in order to construct a practical light source according to the present invention, the irradiation wavelength must be 635.
It is preferably at least nm. The wavelength range of 600 to 635 nm is often included in existing three-wavelength fluorescent lamps, and in order to configure a more effective light source different from the existing light source according to the present invention, the emission wavelength is required. The lower limit of the wavelength is preferably 635 nm. In addition, wavelength 6
It is said that 60 nm light has an effect of enhancing immunity, and such an effect can be expected by including irradiation at this wavelength. However, as shown in FIG. 4, for wavelengths shorter than 700 nm, the absorption coefficient due to hemoglobin is still higher than the wavelength in the range of the window of the living body. Therefore, by setting the wavelength range to 700 nm or more, the living body can more efficiently absorb the irradiated energy.

Further, from FIG.
In the range of 000 nm, both the absorption coefficient of light by water and the absorption coefficient of light by hemoglobin are sufficiently small.
Thus, the wavelength of the radiation is
If the wavelength range is set as above, the irradiated energy can be particularly efficiently absorbed by the living body.

In the case of a color display device, light having a wavelength of about 635 nm may be used as a strong red color.
Irradiation of the red light having a wavelength of about 635 nm can be expected to maintain and improve the biological function, but on the other hand, observing the strong red stimulus may cause a stress, thereby offsetting the above effect. Therefore, in order to obtain the effect of invisible light as in the case where the present invention is applied to a display device (in a case where a display function is provided), it is necessary that the luminosity is lower than the wavelength in the visible region or the light is perceived as light. By using light having a wavelength in the range of 700 nm to 1100 nm, the user can maintain and enhance biological functions without observing unnatural colors.

The radiant energy in the wavelength range from 600 nm to 1100 nm which has an effect on the maintenance and enhancement of biological functions is included, and the radiant energy in the wavelength range from 1100 nm to 2.5 μm is smaller than the radiant energy in the wavelength range from 600 nm to 1100 nm. One method of configuring the light (radiant energy) irradiation device according to the present invention is as follows.
In this method, the emission spectrum of the light source itself has radiation in the wavelength range of 600 nm to 1100 nm.

When the light source is a discharge lamp, an encapsulating material may be selected so as to obtain radiation in the above-mentioned wavelength range of 600 nm to 1100 nm in plasma emission. Also, in the spectral radiant energy distribution of plasma emission,
Even if the radiant energy in the wavelength range of 1100 nm to 2.5 μm is larger than the radiant energy in the wavelength range of 600 nm to 1100 nm, a heat ray absorbing filter is attached to the irradiation window in the light irradiation device using the discharge lamp as a light source. For example, the radiation energy in the wavelength range of 1100 nm to 2.5 μm on the irradiation surface may be smaller than the radiation energy in the wavelength range of 600 nm to 1100 nm. However, the discharge lamp itself has a wavelength of 600 nm to 1100 n.
m in the range from 1100 nm to 2.
Radiation energy in the range of 5 μm is 1
If the spectral radiant energy distribution is smaller than the radiant energy in the range of 100 nm, a discharge lamp with higher radiation efficiency can be obtained.

When the light source is a fluorescent discharge lamp, the wavelength is 60
What is necessary is just to select a phosphor that can obtain emission in the range of 0 nm to 1100 nm. Further, in the spectral radiant energy distribution of the phosphor light emission, the wavelength from 1100 nm to 2.5
Even when the radiant energy in the range of μm is larger than the radiant energy in the range of the wavelength of 600 nm to 1100 nm, a method such as mounting a heat ray absorbing filter on an irradiation window in a light irradiation apparatus using the fluorescent discharge lamp as a light source. Accordingly, the configuration may be such that the radiant energy in the wavelength range of 1100 nm to 2.5 μm on the irradiated surface is smaller than the radiant energy in the wavelength range of 600 nm to 1100 nm. However, the spectral radiant energy distribution is such that the fluorescent discharge lamp itself has radiation in the wavelength range from 600 nm to 1100 nm, and the radiant energy in the wavelength range from 1100 nm to 2.5 μm is smaller than the radiant energy in the wavelength range from 600 nm to 1100 nm. , A fluorescent discharge lamp with higher radiation efficiency can be obtained.

When the light source is an incandescent light bulb, as can be understood from the spectral distribution characteristics described above with reference to FIG. 1, the radiant energy in the wavelength range of 1100 nm to 2.5 μm is generally 600 nm to 1100 nm. Greater than the radiant energy in the range. Therefore, in a light irradiation device using an incandescent lamp as a light source,
A configuration is required in which the radiant energy in the wavelength range from 1100 nm to 2.5 μm is smaller than the radiant energy in the wavelength range from 600 nm to 1100 nm. For example, a filter having a spectral transmission characteristic such that the transmission amount of radiation in the wavelength range of 600 nm to 1100 nm is larger than the transmission amount of radiation in the range of wavelength of 1100 nm to 2.5 μm is provided by an irradiation window (light source) of the light irradiation device. It may be attached to a window through which light emitted from a certain incandescent lamp passes and goes out. Alternatively, in order to provide the spectral emission spectrum of the incandescent lamp itself such that the radiant energy in the wavelength range of 1100 nm to 2.5 μm is smaller than the radiant energy in the wavelength range of 600 nm to 1100 nm, for example, a bulb of an incandescent lamp is configured. Wavelength 60 as glass
The transmission amount of radiation in the range of 0 nm to 1100 nm is 1 wavelength.
Use a material having a spectral transmission characteristic that is larger than the transmission amount of radiation in the range of 100 nm to 2.5 μm, or use a multilayer interference film that selectively transmits radiant energy in the wavelength range of 600 nm to 1100 nm on the glass surface. It may be provided.

Alternatively, a light (radiation energy) irradiating apparatus is constituted by using, as a light source, a solid-state light-emitting element such as a light-emitting diode, a semiconductor laser, or an electroluminescence element having a radiation energy in a wavelength range of 600 nm to 1100 nm in a radiation spectrum. However, the same effect can be obtained. In addition, those elements have a wavelength of 1100.
Even if a large amount of radiation in the range of nm to 2.5 μm is included, by applying a method such as mounting a heat ray absorbing filter on the irradiation window as described above in a light irradiation device using them as a light source. Any configuration is possible as long as the radiation energy in the wavelength range of 1100 nm to 2.5 μm is smaller than the radiation energy in the wavelength range of 600 nm to 1100 nm on the irradiated surface.

In the above experiment by the inventor, the irradiance on the irradiated surface in the wavelength range of 635 nm to 1100 nm was 0.63 W / m ² with the illumination light IL + TR having a significant effect on the maintenance and enhancement of the biological function. In the case of the illumination light FL having no significant effect, the value was 0.05 W / m ² .
The measurement error due to irradiance unevenness is twice or less even if it is largely estimated. From the above results, the light (radiant energy) irradiation method that can obtain a significant effect of maintaining and promoting the biological function is the wavelength to the living body. 600nm to 1100
Irradiance in the range of nm may be set to 0.1 W / m ² or more. At this time, the radiant energy in the range of wavelength 1100 nm to 2.5 μm is changed from wavelength 600 nm to 1100 nm.
Is preferably smaller than the radiant energy in the range.

In the experiments by the inventor, the irradiance in the wavelength range of 700 nm to 1100 nm on the surface to be illuminated, particularly when the effect of irradiation of invisible light is to be obtained, is significant for maintaining and enhancing biological functions. there was an illuminating light IL + TR in 0.37W / m ² effective, a had no significant effect illumination light FL in 0.017W / m ^2,
Taking these values into consideration, a light (radiant energy) irradiation method capable of obtaining a significant effect of maintaining / promoting a biological function is to apply an irradiance of 0.03 W / m ² or more to a living body in a wavelength range of 700 nm to 1100 nm. And it is sufficient. Also at this time, it is preferable that the radiant energy in the wavelength range from 1100 nm to 2.5 μm be smaller than the radiant energy in the wavelength range from 700 nm to 1100 nm.

The upper limit of the irradiance is 1 × 10 ⁵ W / m ^{2, which} is a limit value at which biological tissues such as the crystalline lens and the cornea are not damaged.

As described above, in order to obtain a light (radiant energy) irradiating apparatus which has a significant effect on the maintenance / enhancement of biological functions, it is necessary to increase the wavelength from 600 nm on the surface to be irradiated to 1
Red so that the irradiance in the range of 100 nm is 0.1 W / m ² or more (or the irradiance in the range of wavelength 700 nm to 1100 nm on the surface to be irradiated is 0.03 W / m ² or more). Set the intensity and arrangement of near-infrared radiation sources. With the radiant energy irradiation device configured as described above, it is possible to maintain and enhance the biological functions of the irradiated living body.

Further, as described above, in the spectral energy distribution on the surface to be irradiated, the wavelength from 600 nm to 110
The irradiance in the range of 0 nm is 0.1 W / m ² or more (or 700 nm to 1100 nm on the irradiation surface).
Irradiance in the range of 0.03 W / m ² or more) and radiant energy in the range of wavelengths from 1100 nm to 2.5 μm is smaller than radiant energy in the range of wavelengths from 600 nm to 1100 nm. If added, it is possible to obtain a method of irradiating light (radiant energy) that can maintain and enhance biological functions and simultaneously supply illumination light. Also, the light (radiant energy) for that
The irradiation device includes visible light and red to near-infrared radiation in a wavelength range of 600 nm to 1100 nm in a spectral energy distribution, and a wavelength of 1100 nm to 2.5 μm.
Radiant energy in the range of 600 nm to 1100
The device is configured to emit radiation light smaller than radiation energy in the range of nm, and at least irradiance in the range of wavelengths from 600 nm to 1100 nm on at least the surface to be irradiated (for example, a head that is a center for maintaining and promoting biological functions). 0.1 W / m ² or more (or a wavelength of 7
Irradiance in the range of 00 nm to 1100 nm is 0.03
(W / m ² or more).
If necessary, the number of radiation sources and the input power may be increased to increase the radiation intensity, so that at least the irradiance in the above range on the irradiation surface may be obtained. By using the light (radiation energy) irradiating device configured as described above, it is possible to maintain and enhance the biological functions together with the illumination of the visual target.

The recommended illuminance of indoor lighting is, for example, JISZ9
At 110, 15 for social gathering and entertainment in the living room
It is 0 lux or more. Assuming a maintenance rate of 70%, radiant energy in the range of wavelengths from 600 nm to 1100 nm is 0.1 W / m under illuminance of 100 lux or more.
^In order to make it ² or more, the irradiation light has a radiation energy (that is, radiation efficiency) in a range of 600 nm to 1100 nm per unit light intensity of 0.001 W / lm.
All that is required is the above. In order to realize a light (radiant energy) irradiating device having the above-described characteristics, when the light source is a discharge lamp, the plasma luminescence emits radiant energy in a wavelength range of 600 nm to 1100 nm in addition to visible light. Emitted, wavelength 600 per unit photometry
radiant energy in the range of
What is necessary is just to select an encapsulation substance so that it may be set to 01 W / lm or more. When the light source is a fluorescent discharge lamp, it emits radiant energy in the wavelength range of 600 nm to 1100 nm in addition to visible light, and emits 635 wavelengths per unit light intensity.
radiant energy in the range of
What is necessary is just to select the fluorescent substance which becomes 01 W / lm or more. In addition, in both the discharge lamp and the fluorescent discharge lamp, in order to obtain a preferable spectral radiant energy distribution,
As described above, a heat ray absorption filter or the like may be used if necessary.

Further, in indoor lighting, if the light color is unpleasant, a stress is generated due to the unpleasant color, and the biological function is adversely affected. Therefore, in order to avoid this effect, as a light (radiant energy) irradiation method, the irradiance in the wavelength range of 600 nm to 1100 nm is set to 0.
1 W / m ² or more, wavelength 600 per unit photometry
radiant energy in the range of
01 W / lm or more, and a wavelength of 1100 nm to 2.5
The radiant energy in the μm range is from 635 nm to 11
The light is smaller than the radiant energy in the range of 00 nm and the light color is not unpleasant. The unpleasant light color is, for example, an extreme primary color such as red or blue, and is light that avoids such a light color. In the light (radiation energy) irradiation device, in order to make the light color not unpleasant, an optical means for correcting the light color of the light source used is provided in the light (radiation energy) irradiation device, or the light source itself is used. The filling material in the case of a discharge lamp and the phosphor in the case of a fluorescent discharge lamp may be appropriately selected so as to have a light color that is not unpleasant. Also in this case, as described above, a heat ray absorption filter or the like may be used as needed in order to obtain a preferable spectral radiant energy distribution.

For example, white is accepted as the light color of indoor lighting. At least with this light color, the occupants do not feel uncomfortable. Therefore, as a light (radiation energy) irradiation method in this case, the irradiance in the range of wavelengths from 600 nm to 1100 nm is 0.1 mm on the surface to be irradiated.
1 W / m ² or more, wavelength 600 per unit photometry
radiant energy in the range of
01 W / lm or more, and a wavelength of 1100 nm to 2.5
The radiation energy in the μm range is from 600 nm to 11
It is smaller than the radiant energy in the range of 00 nm, and furthermore, the chromaticity in the visible wavelength range deviates from the blackbody radiation locus (duv) in the International Commission on Illumination (CIE) 1960 UCS chromaticity diagram.
Is set to be within ± 0.01. In the light (radiant energy) irradiation device, in order to obtain a configuration in which the chromaticity of the irradiation light is in the above range, an optical means for correcting the light color of the light source used is provided in the light (radiant energy) irradiation device. Alternatively, in the case of a discharge lamp, an encapsulating material, and in the case of a fluorescent discharge lamp, a phosphor may be appropriately selected so that the light color of the light source itself has the chromaticity.
Also in this case, as described above, a heat ray absorption filter or the like may be used as needed in order to obtain a preferable spectral radiant energy distribution.

On the other hand, CIE 1960
If the chromaticity in the visible wavelength range in the UCS chromaticity diagram deviates from the blackbody radiation locus (duv) out of the range of +0.01 to -0.01, the unnatural feeling of light color as general illumination increases. In some living scenes or for some living people, discomfort may increase, and the stress accompanying this may reduce the NK cell activity of the living body. Therefore, the chromaticity in the visible wavelength range deviates from the blackbody radiation locus (du) in the CIE1960 UCS chromaticity diagram of the light color from the light source.
v) is preferably set in the range of +0.01 to -0.01 (within ± 0.01) as described above.

It should be noted that, in the above description, 600 nm to 11
Irradiance on the irradiated surface and radiant energy per unit measured light amount (irradiation efficiency) for a wavelength range of 00 nm
Has been described, but the wavelength range is 700 nm to 110 nm.
For 0 nm, the irradiance on the irradiated surface may be 0.03 W / m ² or more as described above, while the radiant energy (irradiation efficiency) per unit light intensity on the irradiated surface is 0.0003 W / m2. lm or more.

As described above, according to the method and apparatus for irradiating light (radiant energy) of the present invention, it is possible to maintain and enhance biological functions, for example, improve immunity and activate autonomous functions. Emission or illumination light can be provided. Furthermore,
Since the part of the autonomic nervous system involved in accessory sympathetic nerve control is different from the part of the brain involved in sympathetic nerve control,
By changing the spectral composition, intensity, irradiation direction and the like of the emitted light within the preferable irradiation conditions of the present invention, one of the parasympathetic nerve and the sympathetic nerve can be selectively predominant.

As described above, the light (radiant energy) irradiating apparatus and method of the present invention aims to maintain and enhance human biological functions by irradiating light (particularly, red to near-infrared radiation). Can be used for the purpose of realizing a healthier state. It can also be used for other animals or plants such as livestock and pets for the purpose of improving immunity and activating autonomous functions.

Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings.

(First Embodiment) FIG. 5 shows, as an example of the configuration of a light source to be mounted on a light irradiation device (illumination equipment) according to the present invention, a rare earth phosphor for a conventional three-wavelength band fluorescent lamp. further manganese-activated magnesium-germanium fluoride phosphors in (3.5MgO · 0.5MgF ₂
GeO ₂ : Mn (hereinafter referred to as “MFG”) is mixed, and the emission spectrum of the MFG fluorescent lamp constituted by applying the obtained mixture is shown. It should be noted that the MFG fluorescent lamp according to the present invention is outwardly the same as a conventional fluorescent lamp, and the emission spectrum obtained is different from that of the conventional fluorescent lamp.

In the above-mentioned MFG fluorescent lamp obtained by the present invention, the wavelength of 600 nm
The radiation dose (radiation efficiency) in the range of 100 nm is 0.002
5 W / lm. Further, in order to make the irradiance on the surface to be irradiated in the wavelength range of 600 nm to 1100 nm 0.1 W / m ² or more by using the MFG fluorescent lamp, the illuminance may be 40 lux or more, and 250 lux or more. Thus, an effect equivalent to the above-described illumination light IL + TR can be expected. Moreover, since the MFG fluorescent lamp does not have radiation (far-infrared radiation) having a wavelength of 1100 nm or more, the effect of the thermal stress caused by far-infrared radiation on the effect of maintaining and enhancing the biological function of red to near-infrared radiation. Undesirable effects can be avoided.

However, the above MFG fluorescent lamp has a wavelength of 7
Since it does not include radiation of 00 nm or more, the radiation efficiency in the wavelength range of 700 to 1100 nm on the irradiated surface is 0.00
005 W / lm.

The chromaticity of the light color of the MFG fluorescent lamp is
(X, y) = (0.4485, 0.4172),
In CIE1960 UCS coordinates, it is within ± 0.01 from the blackbody radiation locus. Therefore, the light color is white, there is no unpleasant impression to the illuminating light, and the effect of maintaining and increasing the biological function of red to near-infrared radiation is not hindered.

On the other hand, FIG. 6 shows a configuration example of a light source to be mounted on a light irradiation device (illumination device) according to the present invention.
In addition to the conventional rare-earth phosphor for a three-wavelength emission fluorescent lamp, an iron-activated lithium aluminate phosphor (LiAlO ₂ : F
e, hereinafter referred to as “ALF”), and the emission spectrum of an ALF fluorescent lamp constituted by applying the resulting mixture is shown. It should be noted that the ALF fluorescent lamp according to the present invention is also externally the same as the conventional fluorescent lamp, and the emission spectrum obtained is different from the conventional fluorescent lamp.

In the above-mentioned ALF fluorescent lamp obtained by the present invention, the wavelength from 600 nm per unit light intensity
The radiation dose (radiation efficiency) in the range of 100 nm is 0.001
2 W / lm. Further, in order to make the irradiance on the surface to be irradiated in the wavelength range from 600 nm to 1100 nm 0.1 W / m ² or more by using this ALF fluorescent lamp, the illuminance may be 80 lux or more, and 500 lux or more. Thus, an effect equivalent to the above-described illumination light IL + TR can be expected. In addition, since the ALF fluorescent lamp does not emit radiation having a wavelength of 1100 nm or more, the biological function of red to near-infrared radiation is maintained.
Undesirable effects of thermal stress on the enhancement effect can be avoided.

Further, the ALF fluorescent lamp has a wavelength range of 70 nm.
There is a small emission peak in the range of 0 to 900 nm, and the radiation efficiency in the wavelength range of 700 to 1100 nm is 0.0011.
W / lm. Since light with a wavelength of 700 nm or more has lower luminosity than the wavelength in the visible region or does not feel as light, the use of the ALF fluorescent lamp allows the user to observe unnatural colors. The effect of the above-described invisible light irradiation, that is, maintenance and enhancement of biological functions can be achieved.

The chromaticity of the light color of the ALF fluorescent lamp is
(X, y) = (0.4485, 0.4172),
In CIE1960 UCS coordinates, it is within ± 0.01 from the blackbody radiation locus. Therefore, the light color is white, there is no unpleasant impression to the illuminating light, and the effect of maintaining and increasing the biological function of red to near-infrared radiation is not hindered.

For comparison, the distribution of the relative spectral radiant energy of the MFG fluorescent lamp and the ALF fluorescent lamp shown in FIGS. 5 and 6 is shown in FIG. 7 for comparison with the emission peak wavelength of 660 nm shown in FIG. The figures are shown together with the distribution of the LED and the 60 W silica incandescent lamp.

Further, in Table 3, in addition to the data of Table 1 described above, the irradiance of the above-mentioned MFG fluorescent lamp and ALF fluorescent lamp to the subject's forehead at 635 nm or more was the same as the value in Reference 1. The illuminance (unit: lux) required to be equivalent, that is, the illuminance (unit: lux) required to obtain NK cell activity equivalent to that obtained by the LED in Document 1 is shown. Specifically, Table 3 shows that the wavelengths are 635 nm to 100, as in Table 1.
The irradiance of each light source in the range of 0 nm and the illuminance of 80 lx by an LED having an emission peak wavelength of 660 nm are 3
NK cell activity equivalent to that obtained by irradiation for 0 minutes is 3
The illuminance required to obtain with 0 minute illumination is shown for each light source. Note that the wavelength of 635 nm is a half-value wavelength of an LED having an emission peak wavelength of 660 nm.

[0095]

[Table 3]

Thus, the MFG fluorescent lamp has a 1000
It can be seen that the NK cell activity equivalent to that obtained by the LED in Reference 1 can be obtained at an illuminance of about lux and about 500 lux with the ALF fluorescent lamp.

The above-mentioned MFG fluorescent lamp or AL
If a general lighting fixture equipped with the F fluorescent lamp is installed, for example, in an office, workers working under that lighting will be
It provides the necessary illuminance for work, and can also maintain and enhance vital functions such as activating autonomous functions and improving immunity, and eliminates concerns about the health of workers who are less likely to be exposed to daylight. be able to.

(Second Embodiment) Next, as a second embodiment of the light (radiant energy) irradiating apparatus of the present invention, a discharge lamp or a light emitting diode is provided separately from a conventional fluorescent lamp in a general lighting fixture. A configuration obtained by adding a radiation source for red to near-infrared radiation configured from the above will be described.

FIG. 8 schematically shows the configuration of the light irradiation device (illumination equipment) 1 in the present embodiment. As shown in FIG. 8, the lighting fixture 1 of the present embodiment includes a ring-shaped fluorescent lamp 2 as a light source for illumination and a radiation source 3 for red to near-infrared radiation.
(Hereinafter, referred to as “near-infrared radiation source 3”). As the near-infrared radiation source 3, for example, an infrared light emitting diode (LED) is used.

As described above, the wavelength range of red to near-infrared radiation from the near-infrared radiation source 3 is, in principle, 600 to
1100 nm, more practically 635-1100 nm,
In particular, 700 to pursue the effects of invisible light irradiation
It is 1100 nm.

In this case, as described above with reference to FIG. 4, a “window of a living body” exists in a wavelength range of 700 nm to 1100 nm, and light having a wavelength in this range exists in a living body. It penetrates efficiently into the living body without being absorbed by water or hemoglobin. In addition, particularly in the wavelength range of 800 nm to 1000 nm in the range of the window of the living body, absorption by water and hemoglobin is particularly small,
Light (radiant energy) can be more effectively penetrated into a living body.

Therefore, instead of the light having an emission peak wavelength of 660 nm used in the configuration of the prior art (Reference 1),
Wavelengths in the range of good penetration efficiency into living organisms, for example, AlGaAs
By using light having an emission peak wavelength of 880 nm obtained by a light emitting diode composed of s, it is possible to more efficiently control the biological function control center near the hypothalamus.

Here, light having a wavelength of 880 nm deviates from human visual sensitivity. For this reason, when the infrared radiation light of the luminaire having this wavelength is locally concentrated at the position where the consumer is located, or when a mechanism for tracking the worker by this light is provided, the irradiance variation is thereby reduced. Even if the irradiance greatly changes, the irradiation light itself is not recognized by the consumer, so that the irradiance does not vary or fluctuate. Therefore, in the case of irradiation in the visible wavelength range, the illuminance of the irradiation light may cause discomfort or variation to a consumer or a worker (irradiated living body). No such discomfort is given by using.

Thus, by additionally using a light source in which the wavelength of the emitted light is within a wavelength band in which biological functions can be maintained and enhanced by invisible light, the light environment generated by the illumination light is adversely affected. Without giving
A light illuminating device and a light illuminating method that do not cause a visual problem can be obtained.

Here, the present inventors have found that the illumination light obtained by adding the radiation from the light emitting diode having the emission peak wavelength at 880 nm to the illumination light of the fluorescent light of the bulb color is better than the illumination light of only the illumination light of the bulb color fluorescent lamp. The phenomenon that further activates the parasympathetic nerve was confirmed by experiments. Hereinafter, the experimental results will be described.

In this experiment, one male subject in his forties was placed on a chair in a booth which was illuminated with a fluorescent light of bulb-color fluorescent light having an illuminance of 200 lux on the desk surface (hereinafter referred to as “EX-L illumination light”). He sat down and read for 20 minutes. The subject's face illuminance at this time was 300 lux. During the first 10 minutes of this reading,
The time set to adapt to the X-L illumination light,
During the last 10 minutes of the reading task, the subject's electrocardiogram waveform was measured.

[0107] Further, in the EX-L illumination light as described above,
After the 0-minute reading work, this time, the desk surface illumination 20
Illumination light obtained by adding emission light from a light emitting diode (LED) made of AlGaAs having an emission peak wavelength at 880 nm to a 0-lux light bulb fluorescent light
The subject was seated in a chair in a booth illuminated with "+880 nm illumination light") and read for 20 minutes therein. The subject's face illuminance at this time was 30
It was 0 lux, and the radiation from the LED was 1.2 W / m ² at the face of the subject. As described above, since the radiation having the wavelength of 880 nm is in a wavelength range that cannot be sensed by human eyes, there is no apparent difference between the EX-L illumination light and the +880 illumination light. . Even in the reading operation under +880 nm illumination light, the first 10 minutes
The electrocardiogram waveform of the subject was measured during the last 10 minutes of the reading operation, which was the time set to adapt to the 880 nm illumination light.

Based on the electrocardiogram waveform thus measured, the subject's heart rate variability was subjected to frequency analysis. Here, the high frequency range (HF) of 0.15 to 0.40 Hz among the frequency components of the heart rate variability reflects the activity of the parasympathetic nerve, and the low frequency range (LF) of 0.04 to 0.15 Hz. ) Reflects the activity of both sympathetic and parasympathetic nerves (see, for example, Hiroshi Hayashi, “Clinical Application of Heart Rate Variability-Physiological Significance, Pathophysiological Evaluation, Prognostic Prediction”, Medical Shoin, 1999). ). Thus, when the value of the ratio LF / HF of the integrated value in each of the above frequency bands is large, the sympathetic nerve has higher activity than the parasympathetic nerve, and when the value of LF / HF is small, the parasympathetic nerve has Is more active than the sympathetic nerve.

Based on the results obtained by repeating the measurement of the heart rate by the above-described observation procedure five times, each illumination light (EX
-L illumination light and +880 nm illumination light).
When the average value of the HF values was calculated, the value was 1.91 for EX-L illumination light and 1.77 for +880 nm illumination light. From this, EX-L of only the bulb color fluorescent lamp illumination light
It was confirmed that the +880 nm illumination light to which radiation of a wavelength of 880 nm invisible to the human eye was added can enhance the activity of the parasympathetic nerve more than the illumination light.

(Third Embodiment) Next, as a light (radiant energy) irradiating device according to a third embodiment of the present invention, a general lighting fixture is installed separately from the fluorescent lamp 2 for lighting.
A configuration of a lighting fixture 1 in which a radiation source 3 for red or near-infrared radiation such as D is added, and lighting control of the added radiation source 3 is performed independently of control of the fluorescent lamp 2 for illumination. explain.

The configuration of the lighting fixture of this embodiment is the same as that of the second embodiment shown in FIG. 8, but in this embodiment,
The lighting control of the ring-shaped fluorescent lamp 2 and the near-infrared radiation source 3 is configured to be performed independently of each other. Thereby, the resident or the worker under the illumination by the luminaire 1 of the present embodiment can control the lighting state of the radiation in order to maintain / improve their biological functions. For example, the operation is stopped and only the illumination light source (ring-shaped fluorescent lamp) 2 is turned off.
Only the infrared radiation from the near-infrared radiation source 3 can be taken in a resting state.

In this case, as described above with reference to FIG. 4, a “window of a living body” exists in a wavelength range of 700 nm to 1100 nm, and light having a wavelength in this range exists in a living body. It penetrates efficiently into the living body without being absorbed by water or hemoglobin. In addition, particularly in the wavelength range of 800 nm to 1000 nm in the range of the window of the living body, absorption by water and hemoglobin is particularly small,
Light (radiant energy) can be more effectively penetrated into a living body. Therefore, as the near-infrared radiation source 3 in the lighting fixture 1 of the present embodiment, L that emits light having an emission peak wavelength of 660 nm used in the configuration of the related art (Reference 1).
In place of the ED, a light source capable of emitting light having a wavelength in a range in which the penetration efficiency into a living body is good, for example, a light emitting diode made of AlGaAs emitting light having an emission peak wavelength of 880 nm is used to reduce the vicinity of the hypothalamus. Of the biological function control of the human body can be controlled more efficiently.

Here, light having a wavelength of 880 nm deviates from human visual sensitivity. For this reason, when the infrared radiation light of the luminaire having this wavelength is locally concentrated at the position where the consumer is located, or when a mechanism for tracking the worker by this light is provided, the irradiance variation is thereby reduced. Even if the irradiance greatly changes, the irradiation light itself is not recognized by the consumer, so that the irradiance does not vary or fluctuate. Therefore, in the case of irradiation in the visible wavelength range, the illuminance of the irradiation light may cause discomfort or variation to a consumer or a worker (irradiated living body). No such discomfort is given by using.

In this embodiment, the visible light source (illumination light source) 2 and the near-infrared radiation source 3 can be controlled independently, but at least one of them can be controlled independently. It may be a configuration. For example,
The output of the visible light source 2 is dimmed, and its output is
By linking the outputs, the illuminance for visually recognizing the visual target and the near-infrared irradiance for maintaining and enhancing the biological function can be dimmed with one signal. Alternatively, if the output of the visible light source 2 and the output of the near-infrared radiation source 3 are controlled to be opposite to each other, when the illuminance is high, the energy consumed for visible light emission necessary for visually recognizing a visual target during work or the like is reduced. Mainly use it to save energy, and when illuminance is low, maintain vital functions to calm down after work.
Near-infrared radiation needed for enhancement can be provided primarily.

Further, in the light illuminating device in which the visible light source and the near-infrared radiation source at least one of which can be independently controlled as described above, the control signal for lighting and dimming the light source includes a switch, a dial, and the like. It can be generated directly or indirectly via an arithmetic unit or the like by a signal from external information input means such as a button, a keyboard, or the like. With such a configuration, the user or the operator can appropriately set not only the illuminance but also the near-infrared irradiance according to the situation.

Alternatively, in the light illuminating device in which the visible light source and the near-infrared radiation source at least one of which can be independently controlled as described above, the control signal for lighting and dimming the light source may be time or lighting. The output may be performed according to a predetermined program in accordance with internal information of the lighting device such as an elapsed time after the start. With such a configuration, for example, in an office or the like, during working hours,
By increasing the output of the visible light source only, energy saving is achieved.During the break, the output of the visible light source is reduced and the output of the near-infrared radiation source is increased to maintain and improve the living function of the occupants. As a result, more effective rest can be realized. In addition, in home lighting or office lighting, for example, in places where near-infrared radiation included in the direct and indirect light of sunlight reaches even indoors, the visible light necessary for visual recognition of the visual target is output during the day, and only at night. Alternatively, it may be configured to output near-infrared radiation.

Further, in the light illuminating device in which the visible light source and the near-infrared radiation source at least one of which can be independently controlled as described above, the control signal for lighting / dimming the light source is transmitted to the above-mentioned external light source. When it is necessary to generate both information and internal information in a comprehensive manner, a program for determining whether to generate an independent lighting control signal based on a signal from external information input means or a signal from internal information May be provided in advance. For example, in a room where near-infrared radiation included in direct / indirect light of sunlight reaches, and where near-infrared radiation is not required based on internal information (time) (eg, daytime) However, if there is a shield such as a curtain on the window surface, or if you want to expect a greater effect of maintaining and improving biological functions, external information (signals from switches, etc.)
By giving priority to the control based on, near-infrared radiation can be output.

Lighting based on internal information or external information
The threshold value for determining whether to generate the dimming control signal may be set in advance by the lighting fixture manufacturer at the time of manufacturing.
Further, by adopting a configuration in which the threshold value can be reset to a different value, by changing the threshold value as needed, it is possible to configure a lighting fixture that can respond to the convenience and situation of the user. Further, if the change of the threshold in this case is configured to be automatically performed by learning based on the history of the external information and the internal information, for example, by applying an algorithm such as fuzzy inference, the user can change the setting. It is a convenient lighting device that does not bother you.

The configuration of the light (radiant energy) irradiating device that can make the parasympathetic nerve dominant according to the present invention can be applied to, for example, the lighting in a bedroom, including visible light, and the lighting before going to bed. When only infrared radiation is included, it can be applied to lighting while sleeping. In any case, a calm sleep can be induced by a decrease in heart rate due to the activity of the parasympathetic nerve.

Alternatively, if the configuration of a light (radiant energy) irradiating device that can make the parasympathetic nerve dominant according to the present invention is applied to, for example, the lighting of a dining room, the food can be illuminated with visible light and the activity of the parasympathetic nerve can be enhanced. Can promote digestive juice secretion. In addition, if the configuration of the light irradiation device that can make the parasympathetic nerve dominant according to the present invention is applied to, for example, toilet lighting, it provides visible light and promotes intestinal peristalsis by activating the parasympathetic nerve. And a quick defecation is possible. Furthermore, if the configuration of the light irradiation device that can make the parasympathetic nerve dominant according to the present invention is applied to, for example, bathroom lighting, it is possible to provide visible light and suppress the heart rate by activating the parasympathetic nerve. It is possible to relax the mind and body in addition to the effects of bathing.

On the other hand, if the configuration of the light (radiation energy) irradiation device capable of making the sympathetic nerve dominant according to the present invention is applied to, for example, kitchen lighting, it provides visible light and activates the sympathetic nerve. The alertness can be increased, and the safety in handling blades, fire, and the like can be increased. Alternatively, if the configuration of the light irradiation device that can make the sympathetic nerve dominant according to the present invention is applied to, for example, illumination of roads and streets, it provides visible light and enhances arousal level by activating the sympathetic nerve. Thus, it is possible to smoothly make a decision for avoiding danger against an obstacle or the like. Furthermore, the configuration of the light irradiation device that can make the sympathetic nerve dominant according to the present invention is installed, for example, by incorporating it into the headrest of the driver's seat of the driver, thereby increasing the arousal level of the driver by activating the sympathetic nerve, It is possible to smoothly make a decision on avoiding danger with respect to an obstacle or the like. In addition, the configuration of the light irradiation device that can make the sympathetic nerve dominant according to the present invention can also be applied to, for example, an alarm device, in which case, it is possible to wake up quickly by activating the sympathetic nerve. Can be.

The light (radiation energy) irradiating apparatus according to the present invention as described above can be used at a predetermined wavelength, for example, from 600 nm (or 635 nm) to provide a preferable effect.
It can be applied to a discharge lamp or a fluorescent discharge lamp having a radiant energy in a range of 100 nm.
A discharge lamp or a fluorescent discharge lamp may be used in which radiant energy in the range of 0 nm (or 635 nm) to 1100 nm is 15% or more of radiant energy in the visible wavelength range of 380 nm to 780 nm. Further, in a discharge lamp or a fluorescent discharge lamp having the above characteristics,
For the purpose of preventing the light color from being unpleasant as described above, the deviation (duv) of the chromaticity in the visible wavelength range from the blackbody radiation locus in the CIE1960 UCS chromaticity diagram is ± 0.
The characteristics of the irradiation light may be set so as to be within 01. Further, in the emission spectrum, a wavelength from 700 nm to 1100 nm which effectively and deeply penetrates into the inside of a living body to improve immunity and / or activate autonomic nerves.
Radiant energy in the range of 380 nm to 780
For the purpose of preventing the light color from becoming unpleasant at least 15% of the radiant energy in the visible wavelength range in the range of nm, the black body radiation locus of the chromaticity in the visible wavelength range in the CIE1960 UCS chromaticity diagram is used. (Duv) is ± 0.
The characteristics of the irradiation light may be set so as to be within 01.

In realizing the light (radiant energy) irradiation apparatus and irradiation method of the present invention, the radiation energy in the wavelength range described in the above embodiments is further converted to the frequency of 0.1.
Irradiation may be performed as an alternating current of 5 Hz to 13 Hz or pulsed light. The configuration of the light (radiant energy) irradiation device in this case can be the same as that described with reference to FIG. 8 in the third embodiment, for example.

[0124] Even when the irradiation in the near-infrared wavelength region is performed as alternating current or pulsed light as described above, first, as shown in FIG.
In consideration of the existence of the wavelength range of the “window of a living body” described with reference to the above, instead of the light having the emission peak wavelength of 660 nm used in the configuration of the related art (Reference 1), the penetration efficiency into the living body is reduced. Emission peak wavelength 88 obtained by a light-emitting diode composed of a good range of wavelengths, for example, AlGaAs.
By using 0 nm light, the center of biological function control near the hypothalamus can be controlled more efficiently. In addition, since this wavelength region deviates from the sensitivity of human visual perception, there is no flickering or discomfort with infrared irradiation of this wavelength.

Further, even when the near-infrared wavelength region is irradiated as alternating current or pulsed light as described above, the radiant energy within a predetermined wavelength, for example, from 600 nm (or 635 nm) to 1100 nm, which provides a preferable effect, is not affected. A discharge lamp or a fluorescent discharge lamp having 15% or more of the radiant energy in the visible wavelength range of 380 nm to 780 nm may be used. Further, in a discharge lamp or a fluorescent discharge lamp having the above-mentioned characteristics, for the purpose of preventing the light color from being unpleasant as described above,
The characteristics of the irradiation light may be set so that the deviation (duv) of the chromaticity in the visible wavelength range from the blackbody radiation locus in the E1960 UCS chromaticity diagram is within ± 0.01.

Further, by separately providing a light source in the visible wavelength region and a light source in the infrared region and performing lighting control independently of each other, the NK cell activity can be controlled only at a predetermined or desired time zone. Lighting of infrared radiation for maintaining and improving biological functions is easily realized.

In the above description of the second and third embodiments of the present invention, the light source (radiation source) 2 for radiation in the visible wavelength range and the light source (radiation source) for radiation in the red to near infrared range are described. source)
3 are provided separately from each other.
Although the configuration in which two light sources (radiation sources) 2 and 3 are attached to the same body is illustrated, the configuration of the present invention is as follows.
However, it is not limited to this. For example, a light source (radiation source) 2 for radiation in the visible wavelength range is provided on a wall surface of a room,
A light source (radiation source) 3 for radiation in the red to near-infrared region is arranged on a wall facing the light source, or a light source (radiation source) 2 for radiation in the visible wavelength region near one wall of a room ceiling.
The same effect can be obtained by providing a light source (radiation source) 3 for emitting light in the red to near-infrared region near a wall facing the same.

(Fourth Embodiment) As a fourth embodiment of the present invention, when the light (radiant energy) irradiating apparatus of the present invention described in the above embodiments further has an image display function, A display device obtained by applying the light (radiant energy) irradiation function of the present invention will be described below.

Examples of application of the present invention to the above display device include, for example, a display device for a computer,
In a game display device, a television image display device, or the like, an observer who observes a display screen around the frame portion or the periphery of the display unit (for example, an operator who works with a computer while looking at the display screen) By providing a light source (radiation energy irradiation source) for irradiating light (radiation energy in a broader sense) in the wavelength range of red to infrared in the wavelength range described above, an observer can see the display screen. A configuration capable of maintaining and improving its biological ability by being exposed to red to infrared radiation during the operation.

A more specific configuration example will be further described with reference to the accompanying drawings. In the display device 10 of this embodiment shown in FIG.
A radiation source 12 in the infrared region (referred to as a near-infrared radiation source 12), for example, a light emitting diode (LED) is mounted.
Also in this case, instead of the LED having an emission peak wavelength of 660 nm used in the configuration of the related art (Reference 1), an LED that emits a wavelength within a range with good penetration efficiency into a living body, for example, an LED composed of AlGaAs Is used as the infrared radiation source 12, the center of biological function control near the hypothalamus can be controlled more efficiently. Further, since this wavelength region deviates from the sensitivity of human vision, near-infrared irradiation of this wavelength does not become an unpleasant glare source and does not give flicker or discomfort.

Alternatively, M described in the first embodiment
An FG fluorescent lamp or the ALF fluorescent lamp described in the second embodiment may be used as the near-infrared radiation source 12. In this case, for example, in an ALF fluorescent lamp, the main emission wavelength range is 700 nm to 800 nm, and the above-described Al
It can be used in place of a GaAs LED.

Further, the near-infrared radiation source 12 can be turned on independently of the display unit 11, and the user can turn on the near-infrared radiation source 12 as necessary. Good.

Next, FIG. 10 shows a display device 20 having another configuration according to the present embodiment. In the display device 20, the LE is provided above the normal display unit 21.
A near-infrared radiation source 22 such as D is provided, and an infrared sensor 23 for detecting reflection from a viewer 24 who watches or works on the display among the radiation from the near-infrared radiation source 22 is further provided. From the output of the infrared sensor 23, the irradiance of infrared radiation of the viewer 24 is obtained. By adjusting the radiation output of the near-infrared radiation source 22 based on the result obtained in this manner, the display device 20 in FIG. 10 has a function of maintaining a constant infrared irradiation level to which the viewer 24 is exposed. .

In general, the reflectance of infrared radiation having a wavelength of 700 nm to 1100 nm on the face not covered with hair or clothing is relatively high. At this time, the spectral sensitivity of the infrared sensor 23 is limited to the vicinity of the main wavelength of the near-infrared radiation source 22 (for example, the peak wavelength of the near-infrared radiation source 22 is 880).
In the case of using an AlGaAs LED of nm, the spectral sensitivity of the infrared sensor 23 is limited to a wavelength around 880 nm, so that the amount of infrared radiation emitted to the viewer 24 can be easily controlled.

Using a two-dimensional image sensor such as a CCD as the infrared sensor 23, an image of an area on the front surface of the display unit 21 is taken, and an area having the highest reflection luminance of infrared radiation is viewed. A function of determining the irradiance of infrared radiation that reaches the face of the viewer 24 from the brightness of the portion of the viewer 24, thereby providing the face of the viewer 24 with a certain amount of red light more accurately. External radiation can be applied.

Reference 3 describes a red L having a wavelength of 660 nm.
When irradiating the ED light to the forehead of the user, the light is pulsed at 0.5 to 13 Hz, compared to the case where continuous unmodulated steady light is irradiated.
It reports that NK cell activity can be further enhanced. In this regard, radiation in the infrared region of the wavelength region corresponding to the “window of the living body” described above with reference to FIG. 4 (more efficiently penetrates into the living body and stimulates the hypothalamus of the head)
Can be expected to increase the effect of maintaining and improving the biological function by subjecting to 0.5 to 13 Hz alternating current or pulse modulation. Here, the blinking light in the visible light region of about 10 Hz is a frequency that induces epilepsy, but the wavelength region corresponding to the above-mentioned window of the living body is out of the sensitivity of human visual perception, and thus is viewed. Even if it flashes in the field of view of the person 24, no discomfort occurs.

Hereinafter, the application of the light (radiant energy) irradiation method and irradiation device of the present invention to various specific display devices will be described.

In the following description of the embodiments relating to various kinds of displays, the wavelength range of irradiation having the effect of maintaining and enhancing the biological function is defined as 600 nm to 1100 n.
The description proceeds as m. However, different values are required for the lower limit of this wavelength range depending on the display contents of the display and the environment in which the display is used.

For example, a color display device has a wavelength of 635n.
m may be used, and independently of the image to be displayed, when irradiating with energy radiation that maintains and enhances biological functions, the lower limit of the wavelength range is 635 nm.
Above. In addition, when irradiating energy radiation that maintains or enhances biological functions without affecting the color of an image or the surrounding environment, the lower limit of the wavelength range is set lower than the sensitivity (visibility) of the human eye. The thickness is set to 700 nm or more.

In a CRT display, pixels forming an image are formed by light emission of a phosphor. The phosphor has a main light-emitting portion in the visible wavelength range, and has a wavelength of 600 nm.
By providing a phosphor screen formed of a phosphor having a sub-light emitting portion in a range of from 1 to 1100 nm and irradiating radiant energy in a wavelength range that penetrates a living body, it is possible to maintain and enhance the biological function of the user on the irradiated surface. .

Alternatively, as a phosphor of a CRT display, a phosphor surface is formed of a phosphor obtained by mixing a phosphor material that emits visible light and a phosphor material having an emission spectrum in a wavelength range of 600 nm to 1100 nm, and is used for a living body. By irradiating radiant energy in the wavelength range that penetrates, the biological function of the user on the irradiated surface can be maintained and enhanced.

In a CRT display, a light-emitting portion forming a pixel forming an image by emitting light in the visible wavelength range of a phosphor is overlapped or adjacent to a phosphor screen which emits radiant energy in a wavelength range of 600 nm to 1100 nm. Supplying a part of the driving energy supplied to the fluorescent screen emitting light in the visible wavelength range to the fluorescent screen emitting radiation energy in the wavelength range of 600 nm to 1100 nm, and irradiating the radiation energy in the wavelength range penetrating the living body. Thereby, the living body function of the user on the irradiated surface can be maintained and enhanced. Such a configuration can be used, for example, in the vicinity of a phosphor dot forming a light emitting portion, at a wavelength of 600 nm to 1100 nm.
By applying a phosphor that emits radiant energy in the range of In this case, the electron beam irradiating the phosphor dots partially reaches the phosphor radiating radiant energy in the wavelength range from 600 nm to 1100 nm due to scattering or misalignment, and the electron beam irradiates the phosphor dots from the wavelength 600 nm to 1100 nm.
Emit radiant energy in the range of 100 nm.

Alternatively, in a CRT display, a light-emitting portion for forming a pixel forming an image by emitting light in the visible wavelength range of the phosphor and a phosphor screen for radiating radiant energy in the wavelength range of 600 nm to 1100 nm are provided. Independent of the intensity of the driving energy supplied to the phosphor screen that emits light in the wavelength range, the driving energy is supplied to the phosphor screen that emits radiant energy in the wavelength range of 600 nm to 1100 nm, and the radiant energy in the wavelength range that penetrates the living body is supplied. By irradiating, the biological function of the user on the irradiated surface can be maintained and enhanced. In order to achieve such a configuration, for example, the wavelength of 600 nm to 11
A radiation source is installed to emit radiant energy in the range of 00 nm toward the center of the faceplate. In this case, the radiant energy in the wavelength range of 600 nm to 1100 nm spreads over the entire surface of the face plate while being repeatedly reflected between the outer surface and the inner surface of the face plate. From a wavelength of 600 nm to 110
Irradiation energy in the range of 0 nm can be applied.

In the plasma display, pixels forming an image are formed by the light emission of the phosphor. The phosphor has a main light-emitting portion in the visible wavelength range, and has a wavelength of 600 nm.
By providing a phosphor screen formed of a phosphor having a sub-light emitting portion in a range of from 1 to 1100 nm and irradiating radiant energy in a wavelength range that penetrates a living body, it is possible to maintain and enhance the biological function of the user on the irradiated surface. .

Alternatively, as a fluorescent material for a plasma display, a fluorescent material having a fluorescent surface mixed with a fluorescent material that emits visible light and a fluorescent material having an emission spectrum in the wavelength range of 600 nm to 1100 nm has a fluorescent surface. By irradiating radiant energy in the penetrating wavelength range,
The biological function of the user on the irradiated surface can be maintained and enhanced.

Further, in the plasma display, a light emitting portion for forming a pixel forming an image by light emission in the visible wavelength range of the phosphor is overlapped or adjacent to a phosphor screen for emitting radiant energy in a wavelength range of 600 nm to 1100 nm. Supplying a part of the driving energy supplied to the fluorescent screen emitting light in the visible wavelength range to the fluorescent screen emitting radiation energy in the wavelength range of 600 nm to 1100 nm, and irradiating the radiation energy in the wavelength range penetrating the living body. Thereby, the living body function of the user on the irradiated surface can be maintained and enhanced. Such a configuration can be used, for example, in the vicinity of a phosphor dot forming a light emitting portion, at a wavelength of 600 nm to 1100 nm.
This can be achieved by applying a phosphor that emits radiant energy in the range of m. In this case, due to scattering or misalignment, a part of the electron beam irradiating the phosphor dots reaches the phosphor radiating radiant energy in the wavelength range of 600 nm to 1100 nm, and emits in the range of 600 nm to 1100 nm. Emits energy.

Alternatively, in a plasma display,
A light-emitting portion that forms a pixel that forms an image by emitting light in the visible wavelength range of the phosphor and a phosphor screen that emits radiant energy in the wavelength range of 600 nm to 1100 nm are provided to supply the phosphor screen that emits light in the visible wavelength range. Independently from the intensity of the driving energy, the driving energy is supplied to the fluorescent screen that emits the radiation energy in the wavelength range of 600 nm to 1100 nm, and the irradiation energy in the wavelength range that penetrates the living body is applied to the irradiation surface. Maintain and enhance the user's biological functions. In order to achieve such a configuration, for example, a wavelength of 600 nm is applied to the end face of the face plate.
A radiation source is installed to emit radiant energy in the range of 100 nm toward the center of the faceplate. In this case, the radiant energy in the wavelength range of 600 nm to 1100 nm spreads over the entire surface of the face plate while being repeatedly reflected between the outer surface and the inner surface of the face plate, and the observer of the CRT display uses the face plate as a secondary radiation source. From a wavelength of 600 nm to 110
Irradiation energy in the range of 0 nm can be applied.

Electroluminescence (E)
L) The display forms pixels constituting an image by the light emission of the phosphor. The phosphor has a main light-emitting portion in a visible wavelength range, and has a wavelength of 600 nm to 1100 nm.
By providing a phosphor screen formed of a phosphor having a sub-light emitting portion in the range, and irradiating radiant energy in a wavelength range that penetrates the living body, the biological function of the user on the irradiated surface can be maintained and enhanced.

Alternatively, as a phosphor for an EL display, a phosphor having a phosphor surface made of a mixture of a phosphor material that emits visible light and a phosphor material having an emission spectrum in the wavelength range of 600 nm to 1100 nm has a fluorescent surface. By irradiating radiant energy in the wavelength range that penetrates, the biological function of the user on the irradiated surface can be maintained and enhanced.

In an EL display, a light emitting portion for forming a pixel forming an image by emitting light in the visible wavelength range of a phosphor is overlapped or adjacent to a phosphor screen for emitting radiant energy in a wavelength range of 600 nm to 1100 nm. Supplying a part of the driving energy supplied to the fluorescent screen emitting light in the visible wavelength range to the fluorescent screen emitting radiation energy in the wavelength range of 600 nm to 1100 nm, and irradiating the radiation energy in the wavelength range penetrating the living body. Thereby, the living body function of the user on the irradiated surface can be maintained and enhanced. Such a configuration can be used, for example, in the vicinity of a phosphor dot forming a light emitting portion, at a wavelength of 600 nm to 1100 nm.
By applying a phosphor that emits radiant energy in the range of In this case, some of the electrons that irradiate the phosphor dots reach the phosphor that emits radiant energy in the wavelength range of 600 nm to 1100 nm due to scattering, and radiate radiant energy in the wavelength range of 600 nm to 1100 nm.

Alternatively, in an EL display, a light-emitting portion for forming a pixel forming an image by light emission of a phosphor in a visible wavelength range and a phosphor screen for radiating radiant energy in a wavelength range of 600 nm to 1100 nm are provided. Independent of the intensity of the driving energy supplied to the phosphor screen that emits light in the wavelength range, the driving energy is supplied to the phosphor screen that emits radiant energy in the wavelength range of 600 nm to 1100 nm, and the radiant energy in the wavelength range that penetrates the living body is supplied. By irradiating, the biological function of the user on the irradiated surface can be maintained and enhanced. To achieve such a configuration, for example, a wavelength of 600 nm to 110
A radiation source is installed to emit radiant energy in the range of 0 nm toward the center of the faceplate. In this case, radiant energy in the wavelength range of 600 nm to 1100 nm spreads over the entire surface of the face plate while repeating reflection between the outer surface and the inner surface of the face plate,
Using a faceplate as a secondary radiation source, a wavelength of 600 nm to 1100 n for an observer of a CRT display.
Irradiation energy in the range of m can be irradiated.

A light emitting diode (LED) display forms an image by juxtaposing semiconductor elements that emit light when electric current is injected. At this time, in the emission spectrum, a display is constituted by an LED having a main light emitting portion in a visible wavelength region and having a sub light emitting portion in a wavelength range of 600 nm to 1100 nm, and irradiating radiant energy in a wavelength range penetrating a living body. By doing so, the biological function of the user on the irradiated surface can be maintained and enhanced.

Alternatively, in an LED display, an LED whose emission spectrum is in the visible wavelength range and an LED whose emission spectrum is in the wavelength range of 600 nm to 1100 nm.
A display is constituted by an LED element integrated with an ED, and by irradiating radiant energy in a wavelength range that penetrates a living body, a living body function of a user on a surface to be irradiated can be maintained and enhanced.

In the LED display, a light emitting portion for forming an image by light emission in the visible wavelength range is provided.
A fluorescent screen that emits radiant energy in the range of 0 nm to 1100 nm is superimposed or adjacent to the fluorescent screen, and a part of the driving energy supplied to the light emitting unit is supplied to the radiating unit to radiate radiant energy in a wavelength range that penetrates a living body. By doing
The biological function of the user on the irradiated surface can be maintained and enhanced. In such a configuration, for example, an LED that emits radiant energy in a wavelength range of 600 nm to 1100 nm is arranged around an LED that emits light in a visible wavelength range, and these are connected in series or in parallel to correspond to a video signal. It is only necessary to drive with a control current.

Alternatively, in an LED display, a light-emitting portion for forming an image by light emission in the visible wavelength range,
A radiating section for radiating radiant energy in the range of 00 nm to 1100 nm, and independently of the intensity of driving energy supplied to the light emitting section, a wavelength of 600 nm to 1100 n.
By supplying drive energy to the radiating section that radiates radiant energy in the range of m and irradiating the radiant energy in the wavelength range that penetrates the living body, the biological function of the user on the irradiated surface can be maintained and enhanced. To achieve such a configuration, for example, an LED that emits radiant energy in a wavelength range of 600 nm to 1100 nm is arranged around an LED that emits light in the visible wavelength range, and an LED that emits light in the visible wavelength range.
The control current corresponding to the video signal is
LED emitting radiant energy in the range of 1100nm
In this case, a current independent of the control current may be applied.

In a self-luminous liquid crystal display, a light emitting portion for forming a pixel forming an image by emitting light in a visible wavelength region of a phosphor and a phosphor screen for radiating radiant energy in a wavelength range of 600 nm to 1100 nm are provided. Independent of the intensity of the driving energy supplied to the fluorescent screen that emits light in the visible wavelength range, the driving energy is supplied to the fluorescent screen that emits radiant energy in the wavelength range of 600 nm to 1100 nm, and the radiant energy in the wavelength range that penetrates the living body is provided. By irradiating, the biological function of the user on the irradiated surface can be maintained and enhanced. In order to make such a configuration, for example, a wavelength of 600 nm to 1100 nm
A radiation source is installed to emit radiant energy in the range of toward the center of the liquid crystal panel. In this case, the wavelength 60
Radiation energy in the range of 0 nm to 1100 nm spreads over the entire surface of the liquid crystal panel while repeating reflection between the outer surface and the inner surface of the liquid crystal panel. 600
Irradiation energy in the range of nm to 1100 nm can be applied.

The self-emission type liquid crystal display disperses and modulates the spatial intensity of light in the visible wavelength range to form pixels forming an image. At this time, the visible wavelength range and the wavelength 600
By configuring the display with a light source containing radiant energy in the range of
Radiation energy in the range from 00 nm to 1100 nm is superimposed on the spectral and modulated visible wavelengths forming the pixel, or is transmitted through the periphery of the pixel to irradiate the radiant energy in the wavelength range that penetrates the living body. The biological function of the user on the irradiated surface can be maintained and enhanced.

A polarizing film used in a liquid crystal device of a self-luminous type liquid crystal display has a polarization characteristic with respect to light in a visible wavelength range, but has a polarization characteristic with respect to at least infrared radiation having a wavelength of 700 nm or more. Some properties do not have. For this reason, in the emission spectrum of the visible wavelength range, in addition to the visible wavelength range, by using a backlight as a light source containing radiant energy in the range of 600 nm (or 635 nm) to 1100 nm, the intensity distribution of visible light can be reduced by the liquid crystal. Irrespective of the type of image presented by spatial modulation, 600 nm (or
The user can be irradiated with radiation in the range of 35 nm) to 1100 nm.

In a projection type liquid crystal display, a light emitting portion for forming a pixel forming an image by emitting light in a visible wavelength region of a phosphor and a phosphor screen for radiating radiant energy in a wavelength range of 600 nm to 1100 nm are provided. Independent of the intensity of the driving energy supplied to the phosphor screen that emits light in the wavelength range, the driving energy is supplied to the phosphor screen that emits radiant energy in the wavelength range of 600 nm to 1100 nm, and the radiant energy in the wavelength range that penetrates the living body is supplied. By irradiating, the biological function of the user on the irradiated surface can be maintained and enhanced. To achieve such a configuration, for example, a radiation source is provided on an end face of the liquid crystal panel so as to radiate radiant energy having a wavelength in the range of 600 nm to 1100 nm toward the center of the liquid crystal panel. In this case, the wavelength 600
Radiation energy in the range of 1 nm to 1100 nm spreads over the entire surface of the liquid crystal panel while being repeatedly reflected between the outer surface and the inner surface of the liquid crystal panel. 600n
Irradiation energy in the range of m to 1100 nm can be applied.

The projection type liquid crystal display forms pixels constituting an image by dispersing and modulating the spatial intensity of light in the visible wavelength range. At this time, the visible wavelength range and the wavelength 600n
By constructing the display with a light source containing radiant energy in the range from m to 1100 nm, a wavelength of 60
The radiant energy in the range of 0 nm to 1100 nm is superimposed on the spectral and modulated visible wavelengths forming the pixel, or is transmitted through the periphery of the pixel and irradiated with the radiant energy in the wavelength range penetrating the living body, The biological function of the user on the irradiated surface can be maintained and enhanced.

A polarizing film used in a liquid crystal device of a projection type liquid crystal display has a polarization characteristic with respect to light in a visible wavelength range, but has a polarization characteristic with respect to at least infrared radiation having a wavelength of 700 nm or more. There is no property. For this reason, in the emission spectrum of the visible wavelength range, in addition to the visible wavelength range, by using a backlight as a light source containing radiant energy in the range of 600 nm (or 635 nm) to 1100 nm, the intensity distribution of visible light can be reduced by the liquid crystal. Regardless of the type of image presented by spatial modulation, 600 nm (or 63
Radiation in the range of 5 nm) to 1100 nm can be applied to the user.

As described above, the present invention is applied to various types of display devices, and is used to construct a computer image display device, a game image display device, a television (TV) image display device, or the like. Then, the image display device for a computer is used for an observer watching a computer image, the game image display device is used for a user playing a game, and the television image reproduction display device is used for an observer watching an image. For wavelengths of 600 nm (or 635 nm) to 1100 n, respectively.
A radiation source that emits radiant energy in a range of m is provided, and emits radiant energy in a wavelength range that penetrates a living body while an observer or user views a screen (computer image, game image, or video). Thereby, the biological functions of the observer and the user can be maintained and enhanced.

In a display device such as a computer image display device, a game image display device, or a television image reproduction / display device, if the switching of the image on the display section does not occur for more than a preset time, Wavelength 600 nm (635 nm) to 110
By changing the radiant energy intensity of 0 nm,
The display device may provide a rest period for maintaining and enhancing a biological function to an observer during a pause period of an image. At this time, a screen saver function is obtained by automatically changing the image.

Further, in a display device in which a rest period for maintaining and enhancing a biological function is provided to an observer during a pause period of an image, switching of the image on the display unit does not occur for a time longer than a preset time. From 600 nm (635 nm) to 1100 nm
When the image is switched after changing the radiant energy intensity of the above, the radiant energy intensity in the wavelength range is returned to the intensity before the change, whereby the original state can be returned again.

[0165]

As described above, according to the present invention, light (radiation energy) irradiation (particularly, radiation in the red to near-infrared wavelength range) can maintain and improve biological functions. The radiation of the region can be given to the living body in daily life, and the maintenance and improvement of biological functions such as the enhancement of immunity and the activation of autonomic nerves and the maintenance and improvement of NK cell activity can be realized.

In particular, the light (radiant energy) irradiation device of the present invention can be configured as a general lighting device. Accordingly, by providing the lighting device configured in this manner, for example, the living body function of a person who is forced to live or work for a long time under artificial lighting and cannot sufficiently receive the daylight is required. To maintain / improve and maintain / improve NK cell activity, or
It is possible to always provide a sufficient amount of irradiation without being affected by the season or the like.

Further, the light (radiant energy) irradiation device of the present invention may be further provided with an image display function (display function) so as to function as a display device. For example, if it is arranged around the screen of a display device such as a TV or a computer display device, while watching TV or working on the display,
When the viewer or worker turns his / her face close to the screen, the face is efficiently irradiated with red to near-infrared light, and the display is displayed for a long time on TV display or OA (office automation) work. The biological function of the person and the N in the body
K-cell activity can be maintained and improved.

As described above, according to the present invention, effects such as maintenance / improvement of biological functions and maintenance / improvement of NK cell activity by irradiating light (radiant energy) unconsciously in daily life. Can be realized.

[Brief description of the drawings]

FIG. 1 shows generally used light sources: (a) a three-wavelength-range daylight fluorescent lamp, (b) a white fluorescent lamp,
It is a figure which shows the spectral distribution (distribution of relative spectral radiant energy with respect to wavelength) about each of (c) 60W silica bulb and (d) light emitting diode (LED) of 660 nm of emission peak wavelengths.

FIG. 2 shows a spectral distribution (relative spectral with respect to wavelength) of each of test illumination light (illumination light IL + TR including near-infrared radiation and illumination light FL not including near-infrared radiation) used in the experiment by the inventors. FIG.

FIG. 3 is a diagram showing a spectral distribution (a distribution of relative spectral radiant energy with respect to wavelength) for each of a three-wavelength band fluorescent lamp (neutral white) and a white fluorescent lamp.

FIG. 4 is a diagram showing spectral absorption characteristics of water and hemoglobin as main biological substances in the vicinity of a near-infrared wavelength region.

FIG. 5 is a diagram showing a spectral distribution (distribution of relative spectral radiant energy with respect to wavelength) of an MFG fluorescent lamp configured according to the present invention.

FIG. 6 is a diagram showing the spectral distribution (distribution of relative spectral radiant energy with respect to wavelength) of an ALF fluorescent lamp configured according to the present invention.

FIG. 7 shows the distribution of the relative spectral radiant energy of the MFG fluorescent lamp and the ALF fluorescent lamp,
FIG. 10 is a diagram showing the results together with the results for m LED and 60 W silica incandescent lamp.

FIG. 8 is a diagram schematically showing a configuration of a light irradiation device (lighting fixture) configured according to the present invention.

FIG. 9 is a diagram schematically showing a configuration of a display device configured according to the present invention.

FIG. 10 is a diagram schematically showing another configuration of the display device configured according to the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Light irradiation apparatus (lighting fixture) 2 Visible light source (annular fluorescent lamp) 3, 12, 22 Near-infrared radiation source (radiation source of red to near-infrared radiation) 10, 20 Display device 11, 21 Display unit 23 Infrared Sensor 24 Viewer

 ──────────────────────────────────────────────────続 き Continued on the front page (31) Priority claim number Japanese Patent Application No. 11-126661 (32) Priority date May 7, 1999 (5.7.1999) (33) Priority claim country Japan (JP) (72) Inventor Kenjiro Hashimoto 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) 4C082 PA02 PC09 PC10 PE01 PE02 PG16 PJ01

Claims (31)

[Claims] 1. A radiant energy irradiating device comprising means for irradiating illumination light for illumination including radiation in a visible wavelength range and radiation in a predetermined wavelength range that penetrates into a living body to maintain and enhance biological functions. . 2. The method according to claim 1, wherein the predetermined wavelength range is from 600 nm to 110.
The radiant energy irradiation device according to claim 1, wherein the radiant energy irradiation device has a range of 0 nm. 3. The radiation of the predetermined wavelength range enhances immunity of a living body to maintain and enhance a biological function.
A radiant energy irradiation device according to claim 1. 4. The radiant energy irradiation device according to claim 1, wherein the radiation in the predetermined wavelength range activates autonomic nerves to maintain and enhance biological functions. 5. The radiation device according to claim 1, wherein radiation means for radiation in the visible wavelength range and radiation means for radiation in the predetermined wavelength range are integrated. Radiant energy irradiation device. 6. The radiation means for radiation in the visible wavelength range and at least one of the radiation means for radiation in the predetermined wavelength range are provided independently.
5. The radiant energy irradiation device according to any one of items 1 to 4. 7. The illumination device according to claim 1, wherein an irradiance in a wavelength range of 600 nm to 1100 nm is 0.1 W / m ² or more on a surface to be irradiated by the illumination light. Radiant energy irradiation device. 8. The radiation of the predetermined wavelength range is 600 nm or more.
Radiation in the range of 1100 nm;
The radiant energy irradiation device according to any one of claims 1 to 6, wherein the radiation in the range of 00 nm is pulse-modulated and irradiated at 0.5 to 13 Hz. 9. A radiant energy of radiation in a wavelength range from 600 nm to 1100 nm on a surface to be illuminated by the illumination light, the wavelength being from 380 nm to 780 nm.
Of radiant energy of radiation in the visible wavelength range up to 15
%. The radiant energy irradiation device according to claim 1, wherein the radiant energy irradiation device is not less than%. 10. The radiation efficiency of radiation in the wavelength range of 600 nm to 1100 nm is 0.001 W / lm or more.
The radiant energy irradiation device according to any one of claims 1 to 6. 11. A radiant energy of radiation having a wavelength in a range of 1100 nm to 2.5 μm on a surface to be illuminated by the illumination light is changed from a wavelength of 600 nm to a wavelength of 1100 nm.
The radiant energy irradiation device according to any one of claims 1 to 6, wherein the radiant energy is smaller than the radiant energy of the radiation in the range of nm. 12. The illumination light has a light color that does not cause discomfort, and is used by the International Commission on Illumination (CIE) 1960U.
The radiant energy irradiation device according to any one of claims 1 to 6, wherein a deviation (duv) of a chromaticity in a visible wavelength range from a blackbody radiation locus on a CS chromaticity diagram is within ± 0.01. . 13. The radiant energy irradiation device according to claim 9, wherein the radiant energy irradiation device has a configuration as a discharge lamp. 14. The radiant energy irradiation device according to claim 13, which has a configuration as a fluorescent discharge lamp. 15. It has a configuration as an incandescent lamp,
The radiant energy irradiation device according to any one of claims 9 to 12. 16. The radiant energy irradiation device according to claim 9, which has a configuration as a light source including a solid-state light emitting element. 17. A radiant energy irradiating device comprising means for irradiating radiation of a predetermined wavelength range that has low human visibility and penetrates deeply into a living body to maintain and enhance biological functions. 18. The method according to claim 1, wherein the predetermined wavelength range is from 600 nm to 11
18. The radiant energy irradiation device according to claim 17, which is in a range of 00 nm. 19. The radiant energy irradiation device according to claim 17, wherein the radiation in the predetermined wavelength range enhances the immunity of a living body to maintain and enhance a biological function. 20. The radiation of the predetermined wavelength range activates autonomic nerves to maintain and enhance biological functions.
8. The radiant energy irradiation device according to 7. 21. The irradiance in a wavelength range of 700 nm to 1100 nm on an irradiation surface irradiated with the radiation is 0.03 W / m ² or more.
The radiant energy irradiation device according to any one of 0. 22. The radiation of the predetermined wavelength range is 700 nm.
放射 1100 nm in the range from 700 nm to 1
21. The radiant energy irradiation device according to any one of claims 17 to 20, wherein the radiation in the range of 100 nm is pulse-modulated and irradiated at 0.5 to 13 Hz. 23. The radiant energy of radiation having a wavelength in a range of 1100 nm to 2.5 μm on a surface to be radiated by the radiation is changed from a wavelength of 700 nm to 1100 n.
The radiation energy of the radiation in the range of m is less than 1.
21. The radiant energy irradiation device according to any one of 7 to 20. 24. The radiant energy irradiation device according to claim 21, which has a configuration as a discharge lamp. 25. The radiant energy irradiation device according to claim 24, having a configuration as a fluorescent discharge lamp. 26. It has a configuration as an incandescent light bulb,
The radiant energy irradiation device according to any one of claims 21 to 23. 27. The radiant energy irradiation device according to claim 21, wherein the radiant energy irradiation device has a configuration as a light source including a solid state light emitting element. 28. The radiant energy irradiation device according to claim 17, having an illumination function of supplying illumination light for illumination. 29. The radiant energy irradiation device according to claim 17, which has a display function of displaying a predetermined image. 30. The predetermined image is displayed by means for irradiating radiation in the predetermined wavelength range.
A radiant energy irradiation device according to claim 1. 31. The display device according to claim 29, further comprising display means for displaying the predetermined image, wherein means for irradiating radiation in the predetermined wavelength range is attached to the display means. Radiant energy irradiation equipment.