JPH08150210A - High luminance light irradiation device for phototreatment - Google Patents

Abstract

PURPOSE: To provide a high illuminance light irradiation device for phototreatment readily giving a sufficient quantity of light, by a constitution that a luminance of an emission surface supplying high illuminance light is controlled to emit low luminance high illuminance light. CONSTITUTION: Inside a box 1, a high illuminance light generating portion 2 is formed by vertically arranging a plurality of light sources 20, and a lighting circuit 3 is formed. In an aperture of the front surface of the box 1, an optical diffusion translucent cover 5 is disposed as an optical diffusion member. For example, a milky acrylic plate with an optical transmission rate of about 50 to 70% is provided. When the light sources 20 are lighted, a high illuminance light is emitted from the high luminance light generating portion 2. The light is emitted to the outside through the optical diffusion translucent cover 5 disposed in the aperture. A patient to be treated is to look at the optical diffusion translucent cover 5 as an emission surface. At this time, the light passing through the optical diffusion translucent cover 5 becomes diffusion light, and the emission surface no longer has a high illuminance portion, so that a low luminance is kept. Consequently, the patient can continue to look at the high illuminance light and is given a sufficient quantity of light.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-intensity light irradiation device for phototherapy for phototherapy (high-intensity phototherapy) for abnormal biological rhythms (biological clock).

[0002]

2. Description of the Related Art High intensity light is used as a therapy for pathological biological rhythm abnormalities such as seasonal affective disorder, endogenous depression, sleep-wake rhythm disorder, and local sleep-wake disorder, and fatigue caused by jet lag and shift work. A high-intensity phototherapy that irradiates for several hours is known. In this therapy, the subject usually sees the high-intensity light for a few hours in the morning at a fixed time, but the conventional high-illuminance light irradiation device used for this purpose. Arranges 6 to 10 or more straight tube fluorescent lamps in parallel in a housing having an opening on the front surface (for example, 20 W straight tube fluorescent lamp x 6 lamps or 15 W straight tube fluorescent lamp x 12 lamps). It is configured as a high-illuminance light generating unit configured by that. In addition, since the condition that the illuminance at a point 50 cm from the high illuminance light generating part is 2,500 lx or more is generally shown in the phototherapy, in order to satisfy this condition, the opening surface of the housing is It was either open-faced or covered with a transparent cover.

[0003]

In the above-mentioned conventional example formed only by obtaining high illuminance light, the characteristics on the high illuminance light generating portion side are not taken into consideration at present. In order to easily satisfy the conditions of the high illuminance light, each light source is exposed. For this,
The brightness of each light source or part of each light source is considerably higher than that of its surroundings, making it difficult to see the high-illumination light-generating part, and as a result, the patient has less time to see the high-illumination light. However, the amount of light received (the amount of photons) in the retina decreases due to the narrowing of the eyes and the size of the pupil becoming too small. Therefore, even though the above illuminance is secured, the biological rhythm is reduced. In many cases, the adjustment effect was not sufficiently obtained.

In order to make up for this point, in the field of treatment, for example, an instruction is given to the person to be treated to see the high-illuminance light generating section once every few minutes or more, but this instruction should be observed. There is also a person who cannot do so, for example, a person who escapes from the front of the light because he dislikes high brightness, and in this case, an attendant is required. Moreover, even in a patient who can see the high-intensity light-generating part on his / her own will, when the high-intensity light-generating part is intermittently viewed in this way, the glare is prioritized and it is said that he or she will see it for several seconds or longer. It is often difficult to see, and it causes problems such as short viewing time and squinting of the eyes so that a sufficient amount of light cannot be obtained. If the light emitted from the high illuminance light generating section is made brighter to compensate for this, the glare is further increased and the viewing time and the amount of light are reduced, resulting in a vicious circle.

Further, in the high illuminance light irradiation device, since the light sources are arranged at a higher density than in a normal indoor lighting fixture, a decrease in illuminance due to heat generation tends to be a problem. It is remarkable in the thing. Furthermore, it is often difficult for a person to be treated who needs phototherapy to wake up and light the irradiation device by himself. In the conventional device provided with only the ON / OFF switch of No. 2, it is necessary to injure the hand of another person, and it is not possible to secure this hand, so that sufficient light treatment may not be performed in some cases.

In the conventional irradiation device, since no light control means is provided and a plurality of light sources are turned on at the same time when they are turned on, the amount of irritation change to the eyes of the patient is large and burdensome. Besides, there is a problem that the irradiation direction is fixed and it is difficult to use, and another work cannot be performed in parallel with the operation of viewing the light.

The present invention has been made in view of the above points, and its main purpose is to provide a patient with a high illuminance necessary for phototherapy without being uncomfortable to see. It is to provide a high-intensity light irradiation device for phototherapy that is easy to give a sufficient amount of light, and for other purposes, it is easy to see and can irradiate stable light,
It is to provide a high illuminance light irradiation device for phototherapy that does not require a caregiver.

[0008]

SUMMARY OF THE INVENTION Therefore, the high-intensity light irradiation device for phototherapy according to the present invention provides a low-intensity, high-intensity light for phototherapy, in which the brightness of the light emitting surface for supplying the high-intensity light is kept low. It is characterized by being output as. Illuminance is the amount of light (lx) that the receiving side receives at the measurement point, and luminance is the amount of light per unit area / unit solid angle (cd /
m ² ), and if the area of the light emitting surface is the same, the average brightness of that surface and the illuminance at a certain distance from the light emitting surface are roughly proportional, and the illuminance can be adjusted by the distance from the light source. However, although the brightness depends on the light source itself, the level of illuminance necessary for coping with the abnormal human rhythm is already known as described above. However, no mention has been made so far of brightness.

On the other hand, looking at various data concerning phototherapy up to now, the photostimulation by phototherapy should not be defined only by the illuminance level which is an instantaneous value, but by the product of illuminance and light receiving time ( The present invention has focused on this point, since it has been found that it is preferable to consider that it depends on the received light amount integrated value). That is, even if the illuminance level does not reach the condition of 2,500 lx or more as described above, if the illuminance level is equal to or higher than the required illuminance level and the light stimulus takes a long time
It can be used as a light stimulus in phototherapy.

If the light receiving time is simply considered as the irradiation time, it has the above-mentioned problems.
Ease of viewing (difficulty of viewing) is important, but considering this ease of viewing, the average brightness level of the light source surface and the spatial brightness distribution on the light source surface and in the field of view including the light source surface are easy to see. And the more uniform the spatial brightness distribution, the easier it is to see the light source. For example, in the luminance-illuminance characteristic diagram in FIG. 1, L indicates a point light source (incandescent light bulb) and S indicates the sky above a cloudy sky. Although the point light source L has a considerably lower illuminance than the cloudy sky S, a point of the spatial luminance distribution. The cloudy sky S is much easier to see, and the point light source L
Is extremely hard to see.

Generally, the average brightness level is 20,000 cd
If it exceeds / m ² , there are many people who are dazzled and uncomfortable to see, but considering the brightness distribution further, the maximum and minimum ratios of the brightness of the light source surface and the maximum and minimum ratios of the brightness within a certain area on the light source surface are considered. When quantified, the luminance maximum / minimum ratio in the area of 80% of the central portion of the light source surface is at least 0.75, and the luminance maximum / minimum ratio in a certain area on the light source surface, for example, in the area of a solid angle of 5 to 10 degrees. It is necessary to be at least 0.9 or more in terms of legibility.

In consideration of how the light enters the eye of the patient, the amount of light entering the eye of the patient changes depending on the position and orientation of the light emitting surface. Considering three types of light from the front, the light from above, and the light from below, the easiness of concentration of the line of sight with respect to the light stimulus is in the order of light from above, light from the front, and light from the bottom. It is considered to be easier. The easier it is to concentrate the line of sight, the longer the light receiving time becomes, and the effect can be obtained even at a low illuminance level. However, considering the burden on the eyes, it is necessary to suppress the luminance level so as to concentrate the line of sight.

Further considering the area of the light emitting surface,
As mentioned above, it is advantageous to take a large area to reduce the brightness level, and it is easy to secure this area.
Light from the front, light from below, and light from above seem to improve in this order. Considering the above points, FIG.
As shown in, when the light is output from the substantially vertical light emitting surface E and the light enters from the front for the user, the illuminance received near the user's eye is 2,000 lx or more, preferably 3, 000 lx or more and the average brightness of the light emitting surface is 2
0,000cd / m ² or less, preferably may is 15,000cd / m ² or less. E1 in FIG. 1 indicates this range. The distance from the light emitting surface E to the user is about 0.3 to 0.5 m for a small device, and 0.
It is assumed that the length is 5 to 1 m, and that when the wall surface is the light emitting surface E, the length is 1 to 5 m.

As shown in FIG. 3, when light is output upward from the substantially horizontal light emitting surface E and enters the user from the lower side, the illuminance received near the user's eye is 8
00 to 2,500 lx, preferably 1,000 to 2,500
It is preferable that the value is 0 lx and the average luminance of the light emitting surface is 10,000 cd / m ² or less, preferably 6,000 cd / m ² or less. E2 in FIG. 1 indicates this range. When the light emitting surface E is the desk surface, the distance from the light emitting surface E is 0.1 to 0.4.
Since it is assumed that the illuminance level is too high, side effects such as headache may be expected if the illuminance level is raised too high. Therefore, it is preferable to suppress the illuminance level, and it is necessary to suppress the brightness level as much as possible.

As shown in FIG. 4, when light is output downward from a substantially horizontal light emitting surface and light enters from above for the user, the illuminance received near the user's eye is 4,0.
00 lx or more, preferably 8,000 lx or more and the average luminance of the light emitting surface is 15,000 cd / m ² or less, preferably 1
It is preferable that it is not more than 10,000 cd / m ² . E3 in FIG.
Indicates this range. Such arrangement of the light emitting surface E usually means disposing the light emitting surface E on the ceiling surface, and it is assumed that the distance from the light emitting surface E is about 1 to 2 m, and
Since it is expected that the time to directly look at the light emitting surface E is short,
In this case, the illuminance level is being raised,
Further, since the area of the light emitting surface E can be made large, it is possible to secure the necessary illuminance even at the above brightness level. When the area of the light emitting surface E is large, it is expected that a part of the light emitting surface E will enter the field of view. Therefore, in this respect as well, it is desirable to suppress the brightness level to the level of the cloudy sky S.

As a concrete configuration of the high-intensity light irradiation device for phototherapy, the present invention is a low-intensity high-intensity light generating section having a light source, a lighting circuit for turning on the light source, and a low-intensity high-intensity light generation. A housing for receiving the light from the low-intensity, high-illuminance light generating portion to the outside, and an opening surface provided in the housing for outputting the light from the low-intensity, high-illuminance light generating portion to the outside of the housing. It has a feature in becoming.

The low-intensity, high-illuminance light generating section is composed of a light source and a light diffusing member for making the brightness distribution of the opening surface of the housing substantially uniform, and the light source and the light from the light source incident from the end surface. Is preferably a light diffusing member disposed on the opening surface of the housing, and the light diffusing member disposed on the surface of the light guiding plate is preferably used as the light diffusing member. A transparent cover and a dot pattern filter can be used suitably. A surface light source arranged on the opening surface of the housing may be used as the light source of the low-luminance, high-illuminance light generating unit. In any case, the large area of the opening surface is effective in reducing the brightness.

It is desirable that the opening surface be oriented so that it can easily enter the field of view. For example, the opening surface may be oriented upward, or the orientation of the opening surface may be adjustable. There is a means to concentrate the line of sight in the center of the opening surface,
It is also preferable to provide a means for reducing the burden on the eyes. As the load reducing means, it is possible to use a portion where the luminance distribution on the opening surface is substantially uniform within the range of the eye movement or to use a light source for direct current lighting or an inverter for high frequency lighting.

It is also preferable that the light output stabilizing means of the light source is provided. For example, an air intake hole or an intake fan and an exhaust fan are provided in the housing to suppress the temperature rise inside the housing, thereby stabilizing the light output. The lighting circuit includes a dimming unit that gradually increases the brightness of the light source during lighting, and a delay time control timer that controls each lighting timing of a plurality of light sources,
A control unit that controls the light source lighting time, for example, a device that includes a 24-hour timer that controls the time period in which the light source is turned on is preferable.

Further, a sensing unit for measuring the amount of light received by the user, a judgment unit for comparing the amount of received light with a predetermined value to judge whether or not the required amount of received light has been secured, and an operation according to the output of the judgment unit. The output of the determination unit, and the output unit of the determination unit, the sensing unit that detects the position of the user, the determination unit that determines whether the amount of received light that changes according to the position has reached the required amount of received light, A device provided with a notification means that operates in response to this is also effective in terms of phototherapy.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described. FIGS. 5 and 6 show an example of an irradiation device in which light is emitted forward from a substantially vertical light emitting surface E. Alternatively, the housing 1 formed of a heat-resistant plastic or the like in the shape of a box whose front surface is an open surface has a handle 66 attached to its upper surface and a stand 6 attached to its lower surface. A high illuminance light generation unit 2 formed by arranging the light sources 20 vertically is housed, and a lighting circuit 3 is housed. Further, an exhaust fan 40 is provided above and below one side face, respectively.
As shown in FIG. 7A, intake holes 41, 41 are provided on the upper and lower sides of the other side surface, respectively. Instead of the intake hole 41, an intake fan 42 may be provided as shown in FIG. 7 (b). The exhaust fan 40 may be disposed on the back side of the housing 1 as shown in FIG. 7 (c) or FIG. 7 (d).
In FIG. 7 (d), since the air that has entered the housing 1 through the intake holes 41 in the lower portion of the side surface is exhausted by the cross flow type exhaust fan 40 arranged in the upper portion of the housing 1, the intake holes are shown. Even if the number of 41 is small, effective air cooling can be performed.

As the light source 20, here, a fluorescent lamp bent in a U shape or an H-shaped fluorescent lamp in which two tube ends are connected by a bridge is used. In the figure, 21 is a lamp socket, and 22 is a reflector placed on the back side of the high illuminance light generating section 2. A light diffusing translucent cover 5 as a light diffusing member, here a milky white acrylic plate having a light transmittance of 50 to 70%, is arranged on the front opening of the housing 1. The surface of the surface of which matte processing is performed makes the light softer and easier for the user to see. As a material of the light diffusion semitransparent cover 5,
Besides, it is possible to use polished glass, translucent plastic, a transparent acrylic plate to which a translucent sheet such as Japanese paper is pasted. It is preferable that the light diffusion semi-transparent cover 5 be detachable from the housing 1.

When the high illuminance light generating section 2 outputs high illuminance light by turning on each light source 20, the light is output to the outside through the light diffusion semitransparent cover 5 arranged on the opening surface. The treated person sees the light diffusion semitransparent cover 5 as the light emitting surface E. At this time, since the light passing through the light diffusion semitransparent cover 5 is diffused light, the light emitting surface E has high brightness. Since there is no such portion, the low brightness is maintained as a whole, and it is not uncomfortable for the patient to be treated, and it is possible to continue to see the light of high illuminance necessary for phototherapy. By the way, as the light source 20, 36 W type (total light flux is 2,900 lm) are arranged at intervals of about 70 mm, and when a milky white acrylic plate having a light transmittance of 50% is used as the light diffusion semitransparent cover 5, light is emitted. Since the illuminance at the point 1 m from the surface E was 2,400 lx, the illuminance condition necessary for phototherapy is sufficiently satisfied.

The light-diffusing semi-transparent cover 5 is thus formed.
When attached to the opening surface, the illumination intensity is likely to decrease due to heat generation of the light source 20, but in this irradiation device, as described above, the intake hole 41 or the intake fan 42 and the exhaust fan 40 are provided, and It is possible to prevent the heat from staying in the interior, and thus to suppress the problem of the decrease in illuminance and stabilize the light output. It is also preferable to provide a ventilation hole in the reflection plate 22.

The example shown in FIGS. 8 and 9 is a modification of the above example, in which the exhaust fan 40 is arranged on the back side, and a block for three lights is used as the lighting circuit 3 so that the thickness of the housing 1 ( (Volume) and the reduced weight are shown. Further, FIGS. 10 and 11 show a case in which a handle 66 that can be pulled out upward is further provided on the top of the housing 1.
Although a plurality of light sources 20 are used in each of the above examples,
The single light source 20 may be used as long as it can obtain the same luminous flux. Further, the housing 1 and the lighting circuit 3 may be separately arranged without disposing the lighting circuit 3 in the housing 1.

By the way, the semi-transparent cover 5 is used as a light diffusing member.
It is also possible to use a dot pattern filter or the like.
The light diffusion translucent cover 5 and the dot pattern filter may be used together. FIG. 12 shows a case where this combination is used, and a dot pattern filter 23 is arranged between the light source 20 and the light diffusion semitransparent cover 5. In terms of uniformizing the luminance distribution on the surface of the light diffusion semitransparent cover 5 which becomes the light emitting surface E, the distance between the light source 20 and the light diffusion semitransparent cover 5 is increased, or the thickness of the light diffusion semitransparent cover 5 is increased. It is preferable to increase the size of the dot pattern filter 2.
By using 3 together, the luminance distribution of the light emitting surface E is made uniform while suppressing the thickness. Further, in the illustrated example, the reflection plate 22 arranged behind the light source 20 is extended to the upper and lower sides of the high illuminance light emitting section 2, but this improves the efficiency of the light source 20 and the required illuminance level. This is because it is easier to secure

FIG. 1 shows that the housing 1 is thin.
As shown in FIG. 3, the light source 20 is opposed to the end surface of the light guide plate 24 having the sheet-shaped reflection plate 22 on the back surface, and the light guide plate 24 is provided with the diffusion plate 25 on the front surface. . The light from the light source 20 incident from the end face is guided to the entire surface by the light guide plate 24.
Since the light emitted from the light source 20 is uniformly diffused on the surface serving as the light emitting surface E without waste, it is possible to obtain light that is bright but not dazzling and soft.
It is also effective in making the brightness distribution uniform.

Since the luminous flux of the lamp is smaller than that using the largest number of light sources 20, the illuminance becomes low at the same distance. However, since the light emitted from the light emitting surface E is not dazzling and easy to see, even if the distance from the light emitting surface E to the user's eyes is short, the burden on the user's eyes is small. It is particularly suitable for the case where it is used at a short distance. For example, FIG. 14 shows a case of a foldable notebook computer type, and FIGS. 15 to 17 show a case of being placed on a desk for use as shown in FIG. When used on a desk, the light-emitting surface E
By doing various tasks above, such as eating, playing with mahjong or playing cards, reading, coloring on transparent sheets, etc., it is natural to do without paying attention to the light emitting surface E. The light stimulus reaches the eyes of the user. As shown in FIGS. 19 and 20, it goes without saying that the top surface of the top plate of the desk (table) itself may be the light emitting surface E. In this case, the lighting circuit 3 and the like may be attached to the lower surface of the housing 1 which is a top plate, or may be built in the stand 6.

It is effective to make the light emitting surface E face up from the viewpoint that the light emitted from the light emitting surface E easily enters the eyes of the user, but the direction of the light emitting surface E may be variable. . The orientation shown in FIG. 14 has a variable light emitting surface E, but other examples are shown in FIGS. FIG. 21 shows a support shaft 6 with adjustable angles on both sides of the housing 1.
22 shows a case in which a stand 6 of a type connected with 0 is used, and FIG. 22 shows the case 1 by receiving the cylindrical or spherical convex portion 16 provided on the lower surface of the case 1 by the stand 6.
23 and 25 show a case in which the casing 1 having the light emitting surface E facing upward is supported by a stand 6 which can change the direction. FIG.
Shows an example in which the direction of the light emitting surface E is variable within the range from the upper side to the front side. In any case, the light emitting surface E
The direction of can be adjusted so that it is easy to see, for example, when it is slightly upward, it becomes easier to see the light in the sitting position, and when it is slightly downward, the light can be seen even in a sleeping position. When installing on the bedside, as shown in FIG. 26, when the type shown in FIG. 22 is installed on the stand 6 of a required height, not only the state of waking up in the bed but also the state of sleeping in the bed. But the emitting surface E
Can be turned to the user side.

FIG. 27 shows another example. This is a lantern stand type in which the light emitting surface E is the entire circumference, and if it is installed in the center of the upper surface of the desk when talking to multiple users, it can be used for multiple users at the same time. Can be treated. A halogen lamp or the like can be preferably used as the light source 20 in this case. It is also possible to arrange a light emitting surface E around an object to be watched by a person, for example, a television or a monitor M as shown in FIG. 28 so that the light from the light emitting surface E can be seen when looking at the object to be watched. preferable.

As shown in FIG. 29, it may be embedded in a wall or floor. In addition,
In the one shown in FIG. 29, a curtain is arranged around the light emitting surface E to imitate the atmosphere and imitates a window. Figure 30
As shown in, the light emitting surface E having a large area may be arranged on the ceiling surface and the wall surface. In the state of being in the room, the light from the light-emitting surface E is always in sight no matter where it faces.

When the wall surface is used as the light emitting surface E, as shown in FIG. 31, the light source 20 which is a spotlight illuminates the wall surface or the screen arranged in the room, so that the illuminated portion of the wall surface or the screen becomes the light emitting surface E. You may be able to perceive it. The spotlight type light source 20 having a large luminous flux and the wall surface or the surface of the screen serving as a reflecting surface that causes random scattering cause low luminance, a substantially uniform luminance distribution, and an illuminance that satisfies a required level. E can be obtained.

When the area of the light emitting surface E is not so large,
As shown in FIG. 32, an eye mark 50 may be provided substantially at the center of the light emitting surface E. As the eye mark 50, a substantially circular green or orange color (black is unsuitable) can be preferably used. When such an eye mark 50 is attached, it becomes easy for the user to concentrate his or her line of sight on the central portion of the light emitting surface E.

In order to reduce the burden on the eyes of seeing the light emitting surface E, the following structure is preferable. First, the light emitting surface E in which a plurality of light sources 20 are used tends to appear bright at the center and dark at the periphery. For such a thing that looks like this, as shown in FIG. 8, it is advisable to slightly narrow the interval between the light sources 20 in the peripheral portion rather than in the central portion.

As shown in FIG. 33, the opening surface (light emitting surface E)
If the shape is an elliptical shape or a two-circle joint shape, it is possible to reduce discomfort with the visual field surface, and thus to reduce the burden on the eyes. Also, even if you are gazing at a fixed point,
Although a slight spontaneous eye movement occurs, this small range saccade has a solid angle of about 30 minutes (a normal saccade has a wider angle range). At this time, if the range of the portion where the luminance distribution on the light emitting surface E is as uniform as possible is set to be larger than the visual field range in which the eye movement occurs, it is possible that the luminance entering the eye changes with the eye movement. Since it disappears, the burden on the eyes can be reduced. In addition,
The brightness of the straight tube fluorescent lamp is not so high as that of the point light source, and the brightness distribution is relatively uniform, but when this is exposed and used, uneven brightness occurs near the lamp boundary. Not good for

Further, as a burden on the eyes, there is a flicker of the light source 20, and the flicker is not only visible to the eyes but also a considerable burden on the eyes even if the flicker is not visible. It is usually affected. This point is preferably dealt with by using a light source 20 of a direct current lighting type or a high frequency inverter lighting type. Incidentally, when the light source 20 is a fluorescent lamp, it is preferable to turn on the super-high frequency of about 40 kHz.

As the light source 20, in addition to the above-mentioned type, an EL panel or a surface light source type in which phosphors are arranged in a plane may be used. In this case, in addition to being advantageous in terms of thinning, the arrangement of the lighting circuit 3 is also simple. Next, a preferable example of the lighting circuit 3 will be described. FIG. 34 shows an example of the lighting circuit 3 corresponding to the irradiation device shown in FIGS. 5 and 6, and includes a plurality of lighting circuit units 31 including ballasts and inverters for each light source 20, and these lighting circuits. It comprises a 24-hour timer 32 for controlling the supply of commercial power to the unit 31. Each lighting circuit unit 31 is arranged behind the corresponding light source 20, and the 24-hour timer 32 is arranged so as to be embedded in one side surface of the housing 1 to change the setting of the energization time zone in the 24-hour timer 32. Can be performed by removing the cover 15 on the side surface of the housing 1. FIG.
33 of 4 is a timer output contact. As shown in FIG. 35 (a), a 24-hour timer 32 is arranged on the outer surface of the housing 1, or as shown in FIG. 35 (b), a 24-hour timer is provided in the middle of the power cord 39 drawn into the housing 1. Timer 32
May be arranged. Although not shown, it may be possible to switch between manual turning on and off and turning on and off by the 24-hour timer 32.

In the high illuminance light irradiation device, when the time zone set by the 24-hour timer 32 comes, commercial power is supplied to the lighting circuit unit 31 to turn on the respective light sources 20, and the high illuminance light generation unit 2 Emits light of high illuminance, and this light is output to the outside through the light diffusion semitransparent cover 5. At the set time, the light is turned off. It can be automatically turned on for a fixed time every day.

FIG. 36 shows another embodiment of the lighting circuit 3, in which the lighting circuit section 31 for each light source 20 is not directly connected to the 24-hour timer 32.
A plurality of (two in the illustrated example) lighting circuit units 31 are directly connected to the 24-hour timer 32, and the remaining (four in the illustrated example) lighting circuit units 31 are connected via a delay time control timer 34. . Delay time control timer 34 here
Is composed of general power-on relays.
When the timer output contact 33 of the time timer 32 is turned on, the two light sources 20 are turned on, but the other light sources 20 are turned on after the time set by the delay time control timer 34 has elapsed. When the timer output contact 33 of the 24-hour timer 32 is turned off, all the light sources 20 are turned off.
As described above, when all the light sources 20 are not turned on at the same time but are turned on step by step, it is possible to reduce the amount of change in stimulus to the person to be treated and reduce the burden. Can be easily accepted.

In this case, when the six light sources 20 are arranged vertically, the second light source 20 from the top and the second light source 20 from the bottom are turned on first, and the remaining light sources 20 are subsequently turned on.
Is preferably turned on so that uneven brightness does not occur much even when the two light sources 20 are turned on. It is preferable that the delay time control timer 34 can also adjust its delay time as shown in FIG. 37 (a). Reference numeral 35 in FIG. 37 is a switch for switching between timer control and manual control. As shown in FIG. 37 (b), a combination of a manual on / off switch 36 and a delay time control timer 34 is also effective. If the number of delay time control timers 34 is increased, the lighting can be made more gradual.

Of course, a dimming circuit is incorporated in the lighting circuit 3, and the light intensity of each light source 20 is increased stepwise as shown in FIG. 38 (a) or continuously increased as shown in FIG. 38 (b). You may do it. In this case, it is said that the light adaptation to the eyes is completed in about 1 minute, but that is the time until it recovers from the state where the visual sense was temporarily paralyzed by the rapid light stimulation. Since it is considered that a time process corresponding to a gentler level change than in the case of 1) is required, it is preferable to take 5 to 10 minutes until full lighting.

Instead of the above-mentioned timers 32 and 34, FIG.
As shown in FIG. 9, the lighting circuit 3 is controlled through a control circuit 38 including a multifunctional control circuit 38a including a microcomputer and a power control unit 38b including a switching element that operates at its output. May be. It is possible to easily respond not only to 24-hour light stimulation, but also to coping with sleep phase delay syndrome, jet lag, etc., that is, by gradually shifting (fastening) the lighting time every day. .

Considering that the illuminance changes depending on the distance from the light emitting surface E as described above, as shown in FIG. 40, the sensing unit 7 for measuring the amount of light received in the vicinity of the patient.
2, a determination unit 71 that determines whether the amount of received light measured by the sensing unit 72 has reached a predetermined value, and an informing unit 70 that operates according to the output of the determination unit.
If the illuminance in the vicinity of the treated person does not reach the predetermined value because the treated person is located far from the light emitting surface E or is displaced from the irradiation direction, the illuminance is not sufficient by operating the notification means 70. The patient is informed of this fact and is prompted to come closer to the light emitting surface E or to be positioned in front of the light emitting surface E. It is convenient to mount the sensing unit 72 near the chest of the patient.

As shown in FIG. 41, the sensing unit 73 arranged near the light emitting surface E detects the position of the person to be treated, and if there is no person to be treated within a range in which sufficient illuminance can be obtained, the notification means 70. May be activated. If two sensing parts 73 such as an infrared position detecting device are used as shown in the figure, it is possible to make a more appropriate judgment.

Next, an example of the result of applying the optical stimulation by the irradiation device according to the present invention to the elderly with dementia will be described with reference to FIGS.
Shown in 42 and 43, the thick line portion represents the sleep time of the patient, and the framed portion represents the time zone during which light stimulation was given (time in the morning from about 9:00 am to about 11 am)
And × indicates no recording. The optical stimulus given is shown in Fig. 5.
Further, it has a light emitting surface E having a low luminance and a substantially uniform luminance distribution as shown in FIG. 6, and the illuminance in the vicinity of the eyeball of the subject is 3,000 to 4,000 lx. In the period A in which the light stimulation is not given, the sleep-wake rhythm of the treated person is disturbed, but when the light stimulation is started (period B),
It was reported that the 24-hour periodicity was enhanced and the sleep patterns became regular, and the quality of night sleep was improved. Then, in the period C in which the application of the light stimulus was temporarily suspended, the turbulence became large as apparent from FIG. 43, but when the application of the light stimulus was started again (time period D), the pattern returned to the regular pattern.

Further, the sleeping time occupying the light-off time zone in this elderly facility is as shown in FIG.
In D), there was a marked increase with respect to the period (A, C) where light irradiation was not performed, and the increasing tendency was reproducible. Further, when the change in the sleep time is examined every 5 days, as shown in FIG. 45, the sleep time starts to increase several days after the start of the light irradiation, and the light irradiation period (B,
The level in D) was stable.

Moreover, the frequency distribution of sleeping hours is 80% of the night.
As shown in FIG. 46, when compared in the two classes of above / less than, the ratio of the days that slept by 80% or more significantly increased during the light irradiation period (B, D). It is considered that this is because the light-emitting surface E was easy to see in addition to the relatively high illuminance level, and the subject was able to receive sufficient light stimulation.

[0048]

As described above, according to the present invention, the low-luminance high-illuminance light in which the luminance of the light-emitting surface for supplying the high-illuminance light is suppressed to a low level is output as light for phototherapy. It is hard to see and can put light into the eyes without turning away or squinting, and it can reduce the burden on the person to be treated for a long time such as 2-3 hours. The light stimulus with a sufficient amount of light necessary for phototherapy can be applied to the retina of the subject, and a high biological rhythm adjustment effect can be obtained. Also, since it is not necessary to give the patient an instruction to view the light once every few seconds or more, the manpower required for the light treatment can be reduced, and the patient dislikes the high brightness light and escapes. Such a situation will not occur.

Further, the illuminance received by the light emitted from the substantially vertical light emitting surface in the vicinity of the eyeball of the user is 2,000 lx or more and the average luminance of the light emitting surface is 20,000 cd / m ² or less, or the light is substantially horizontal. The illuminance received by the light emitted upward from the light emitting surface in the vicinity of the user's eye is 800 to 2,50.
By setting 0 lx and the average luminance of the light emitting surface to 10,000 cd / m ² or less, or by setting the illuminance received near the eyeball of the user by the light output downward from the substantially horizontal light emitting surface to 4,000 lx or more, It is possible to make the light appropriate and easy to see in any usage form. In addition, such a guideline for designing the light emitting surface also serves as a guideline for performing phototherapy, and has a great meaning.

Then, the low-intensity and high-illuminance light generator, the lighting circuit for turning on the light source, and the low-intensity and high-illuminance light generator are housed and the light from the low-intensity and high-illuminance light generator is emitted to the outside. A housing, and an opening surface provided on the housing for outputting light emitted from the low-luminance high-illuminance light generating section to the outside of the housing, and particularly, the low-luminance high-illuminance light generating section includes a light source and a housing. By using a light diffusing member that substantially uniformizes the brightness distribution on the opening surface of the above, light suitable for phototherapy can be easily obtained.

In the case where the low-luminance, high-illuminance light generating section is composed of a light source, a light guide plate for outputting the light from the light source incident from the end face to the surface, and a light diffusing member arranged on the surface of the light guide plate. Makes it possible to make the device thinner, and at the same time, it is possible to obtain a product in which it is easy to make the brightness distribution uniform and easy to see.
Further, when a light diffusion semitransparent cover or a dot pattern filter arranged on the opening surface of the housing is used as the light diffusion member, it is effective in uniformizing the luminance distribution, and is used as a light source for the low-luminance high-illuminance light generating section. If the surface light source arranged on the opening surface of the housing is used, the thinnest one can be obtained. Further, by making the area of the opening surface large, it is effective in lowering the luminance and making it easier to see. In addition, it is preferable that the opening surface be oriented so that it can easily enter the field of view because it is easy to give more light to the patient, and if the opening surface is directed upward, the By working on the surface, you can see the light while doing the work, and if you can adjust the orientation of the opening surface, the light can be directed in an appropriate direction regardless of the posture and orientation of the patient. It is easy to use because it can be aimed at and the posture of the phototherapy is not limited.

Provision of means for concentrating the line of sight in the center of the opening surface and provision of a burden reducing means for reducing the burden on the eyes also enable more light to enter the eyes of the patient. It is preferable from the point of view that as a burden reducing means, a portion where the brightness distribution on the opening surface is substantially uniform is set to be equal to or more than the range of eye movement, or a light source that is lit by direct current or a light source that is lit by an inverter high frequency is used. It is advantageous in terms of cost.

A device provided with a light output stabilizing means for a light source, for example, an air intake hole or an intake fan and an exhaust fan may be provided in the housing to suppress the temperature rise in the housing to stabilize the light output. Since the legibility can be improved, preferable results can be obtained in terms of adjusting the biological rhythm. The lighting circuit includes a dimming unit that gradually increases the brightness of the light source at the time of lighting, one that includes a delay time control timer that controls each lighting timing of a plurality of light sources, light source lighting time If a control unit that controls, for example, a 24-hour timer that controls the time zone in which the light source is turned on is provided, it is possible to reduce the amount of irritation change to the eye of the patient and reduce the burden. It is possible to make it easier to accept high-intensity light stimuli, and it is possible to automatically turn on the light every day during the optimal time period for phototherapy, or to shift the lighting time period little by little every day. Therefore, even if it is difficult for the person to be treated to turn on the light every day for this reason, the light treatment effect can be enhanced without the need for manpower.

A sensing unit for measuring the amount of light received by the user, a judgment unit for comparing the amount of received light with a predetermined value to judge whether the required amount of received light has been secured, and a notification which operates according to the output of the judgment unit. And a sensing unit for detecting the position of the user, a judgment unit for judging whether or not the amount of received light which changes according to the position has reached the required amount of received light, and the output of the judgment unit. If it is also equipped with a notification means that activates, it is difficult for human beings to directly judge whether or not the illuminance level has reached the required value, and therefore appropriate light stimulation can be received. It will be possible to easily check whether or not there is.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of illuminance-luminance characteristics of a light emitting surface according to the present invention.

FIG. 2 is an explanatory diagram in the case of outputting light from almost the same vertical plane as above.

FIG. 3 is an explanatory diagram when light is output upward from a substantially horizontal light emitting surface of the same.

FIG. 4 is an explanatory diagram when light is output downward from a substantially horizontal light emitting surface of the same.

FIG. 5 shows an example of a form of an embodiment of the present invention,
(a) is a perspective view and (b) is a right side view.

FIG. 6A is a plan view of the same as above, and FIG. 6B is a front view of the same.

7A is a left side view of the above, FIG. 7B is a left side view of another example, FIG. 7C is a rear view of another example, and FIG. 7D is a rear view of another example.

FIG. 8 shows another example of the embodiment, (a) is a plan view and (b) is a front view.

FIG. 9 is a side view of the above.

FIG. 10 is a perspective view of another example.

FIG. 11 is a perspective view of the above.

FIG. 12 shows another example, (a) is a schematic cross-sectional view, and (b).
Is a partial front view.

FIG. 13 is a cross-sectional view of another example.

FIG. 14 shows yet another example, in which (a) and (b) are perspective views.

FIG. 15 is a front view of another example.

FIG. 16 is a side view of the same.

FIG. 17 is a perspective view of a modification example of the above.

FIG. 18 is a perspective view showing a usage state of the same.

FIG. 19 is a perspective view showing another form.

FIG. 20 is a perspective view showing still another form.

FIG. 21 is a perspective view of another example.

FIG. 22 shows another example, (a) is a front view and (b) is a side view.

FIG. 23 is a side view of still another example.

FIG. 24 is a side view of still another example.

FIG. 25 is a perspective view of still another example.

FIG. 26 shows still another embodiment, (a) is a front view,
(b) is a side view.

FIG. 27 is a perspective view of another embodiment.

FIG. 28 is a front view showing still another form.

FIG. 29 is a front view showing still another form.

FIG. 30 is a front view showing another embodiment.

FIG. 31 is a front view showing a different form.

FIG. 32 is a front view of another example.

33 (a) and (b) are front views showing examples of the shape of the light emitting surface.

FIG. 34 is a block circuit diagram showing an example of a lighting circuit.

35 (a) and (b) are side views showing another example of installation of a 24-hour timer.

FIG. 36 is a block circuit diagram showing another example of a lighting circuit.

37 (a) and (b) are partial side views showing an arrangement example of a lighting circuit.

38 (a) and 38 (b) are explanatory views of a dimming example in the one including the dimming section.

FIG. 39 is a block circuit diagram showing still another lighting circuit.

FIG. 40 is a side view showing an example of a device including a sensing unit.

41A and 41B show an example of a device including another sensing unit, in which FIG. 41A is a side view and FIG. 41B is a plan view.

FIG. 42 is an explanatory diagram of a change example of a sleep pattern.

FIG. 43 is an explanatory diagram of a change example of a sleep pattern.

FIG. 44 is an explanatory diagram of an average sleep time.

[Fig. 45] Fig. 45 is an explanatory diagram of the ratio of the average value of the sleeping time every 5 days to the turn-off time.

FIG. 46: Average sleep time is 80% or more of the off time /
It is explanatory drawing of the ratio which the case where it is less than.

[Explanation of symbols]

 E Light emitting surface 1 Housing 2 High illuminance light generator 3 Lighting circuit 5 Light diffusion semi-transparent cover 20 Light source

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Norio Nakano, 1048, Kadoma, Kadoma, Osaka Prefecture, Matsushita Electric Works Co., Ltd. (72) Inventor, Kei Hagiwara, 1048, Kadoma, Kadoma, Osaka Prefecture

Claims (27)

[Claims] 1. A high-intensity light irradiation device for phototherapy, which outputs low-intensity high-intensity light in which the brightness of a light-emitting surface that supplies high-intensity light is suppressed as light for light therapy. 2. The illuminance received by the light emitted from the substantially vertical light emitting surface in the vicinity of the eyeball of the user is 2,000 lx or more, and the average luminance of the light emitting surface is 20,000 cd / m ² or less. The high illuminance light irradiation device for phototherapy according to claim 1. 3. The illuminance received by the light output upward from a substantially horizontal light emitting surface in the vicinity of the user's eye is 800 to 2,
500 lx and average luminance of the light emitting surface is 10,000 cd / m
^{2. The} high illuminance light irradiation device for phototherapy according to claim 1, wherein the number is ² or less. 4. The illuminance received by the light output downward from a substantially horizontal light emitting surface in the vicinity of the user's eye is 4,000 lx.
The high illuminance light irradiation device for phototherapy according to claim 1, wherein the average brightness of the light emitting surface is 15,000 cd / m ² or less. 5. A low-brightness, high-illuminance light generating section provided with a light source,
A lighting circuit for turning on a light source, a housing for accommodating the low-luminance high-illuminance light generating section and for outputting light from the low-luminance high-illuminance light generating section to the outside, and low-luminance high-illuminance light generation provided in the housing. A high illuminance light irradiation device for phototherapy, comprising: an opening surface for outputting light emitted from a portion to the outside of the housing. 6. The phototherapy height according to claim 5, wherein the low-intensity, high-illuminance light generating section includes a light source and a light diffusing member for making the brightness distribution on the opening surface of the housing substantially uniform. Illuminance light irradiation device. 7. The low-brightness, high-illuminance light generating section includes a light source, a light guide plate for outputting light from the light source incident from an end face to the surface,
The high illuminance light irradiation device for phototherapy according to claim 5, comprising a light diffusing member arranged on the surface of the light guide plate. 8. The high illuminance light irradiation device for phototherapy according to claim 6, wherein the light diffusion member is a light diffusion semitransparent cover arranged on the opening surface of the housing. 9. The high illuminance light irradiation device for phototherapy according to claim 6, wherein the light diffusion member is a dot pattern filter. 10. The high-intensity light irradiation apparatus for phototherapy according to claim 5, wherein the low-luminance high-intensity light generation section uses a surface light source arranged on the opening surface of the housing as a light source. . 11. The high illuminance light irradiation device for phototherapy according to claim 5, wherein the area of the opening surface is large. 12. The high illuminance light irradiation device for phototherapy according to claim 5, wherein the opening surface is oriented so as to easily enter the visual field. 13. The high illuminance light irradiation device for phototherapy according to claim 12, wherein the opening surface faces upward. 14. The high-illuminance light irradiation device for phototherapy according to claim 12, wherein the orientation of the opening surface is adjustable. 15. The high illuminance light irradiation device for phototherapy according to claim 5, further comprising means for concentrating the line of sight at the center of the opening surface. 16. The high illuminance light irradiation device for phototherapy according to claim 5, further comprising a burden reducing means for reducing a burden on the eyes. 17. The high illuminance light irradiation device for phototherapy according to claim 16, wherein a portion where the luminance distribution on the opening surface is substantially uniform is equal to or larger than the range of eye movement. 18. The high-illuminance light irradiation device for phototherapy according to claim 16, wherein the light source is a DC light source. 19. The high-illuminance light irradiation device for phototherapy according to claim 16, wherein the light source is a high frequency inverter light source. 20. The high illuminance light irradiation device for phototherapy according to claim 5, further comprising a light output stabilizing means of the light source. 21. The high illuminance light irradiation device for phototherapy according to claim 20, wherein the light output stabilizing means is an intake hole or an intake fan and an exhaust fan provided in the housing. 22. The high-illuminance light irradiation device for phototherapy according to claim 5, wherein the lighting circuit includes a light control section for gradually increasing the brightness of the light source at the time of lighting. 23. The high-illuminance light irradiation apparatus for phototherapy according to claim 5, wherein the lighting circuit includes a delay time control timer for controlling each lighting timing of a plurality of light sources provided. 24. The high-illuminance light irradiation apparatus for phototherapy according to claim 5, wherein the lighting circuit includes a control unit for controlling a light source lighting time. 25. The high-intensity light irradiation device for phototherapy according to claim 24, wherein the lighting circuit includes a 24-hour timer for controlling a time zone in which the light source is turned on. 26. A sensing unit for measuring the amount of light received by a user, a judgment unit for comparing the amount of received light with a predetermined value to judge whether or not a required amount of received light has been secured, and an operation according to the output of the judgment unit. The high illuminance light irradiation device for phototherapy according to claim 5, further comprising: 27. A sensing unit for detecting the position of the user, a judging unit for judging whether or not the amount of received light which changes according to the position has reached a required amount of received light, and a notification which operates according to the output of the judging unit. The high-illuminance light irradiation apparatus for phototherapy according to claim 5, further comprising: