JP2006289055A - Cosmetic treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cosmetic treatment apparatus for subcutaneously penetrating a light from a light-emitting diode and planning to rejuvenate cells by directly operating to dermal cells, which obtains high efficiency without a special cooling mechanism. <P>SOLUTION: A planar light irradiating apparatus 1 of a matrix structure 2 is two-dimensionally arranged with the light-emitting diode 10 for irradiating the face with a light, and a cooling problem on an irradiating surface body and a light receiving surface body as a past problem of the conventional technique is solved by proposing new techniques about the apparatus shape, a space 7 for passing cooling air through on the irradiated surface, and the arrangement of the light-emitting diode while the planar light irradiating apparatus having excellent convenience and uniformly and widely restorative effect of beautiful skin is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a skin beautifying treatment apparatus for irradiating a subject's skin with light from a planar light emitting diode matrix to activate the skin to obtain a skin beautifying effect, and more particularly to an apparatus for irradiating the face of a subject. Furthermore, the present invention relates to a skin rejuvenation treatment device that reduces the mental and physical burden on the subject and improves convenience and performance.

It is known that when the human body is exposed to light, enzymes and hormones can be stimulated in response to light of a specific wavelength, causing a dynamic reaction in the body that can alter biological functions (for example, non- Patent Document 1), and is actively applied to the medical field. In addition, the present inventor has developed a treatment applying this photobiological activation reaction in laser treatment, and has named it “low reactive level laser treatment (LLLT)”. This is now an international idiom (see Non-Patent Document 2, for example). If the low response level laser treatment is applied for cosmetic purposes, blood circulation and skin metabolism at the site are improved. Therefore, the site is activated, and for example, pigment cells such as aza, blemishes and buckwheat are decomposed, and a skin beautifying effect can be obtained in which normal color skin is revived. For this purpose, Patent Documents 1 and 2 have already been provided as apparatuses using laser light.
By Jacob Riverman, translated by Daisuke Iimura, “Medicine of Light,” Nihonkyobunsha, May 25, 2000, p. 8 Toshio Oshiro, “Laser Beauty of Oshiro Medical Expo”, Nitto Shoin, July 10, 2001, p. 68-77 JP2003-175116 (full text) Japanese Patent Application Laid-Open No. 2004-141327 (full text)

However, since this laser treatment is accompanied by a strong thermal reaction, there is a risk of generating pain or heat at the irradiated site. In addition, because of the monochromaticity and directivity that are the characteristics of laser light, if the eye of the subject is irradiated, it can lead to blindness. Therefore, the laser treatment had to be performed under the guidance of specialists such as doctors. In particular, when irradiating the entire face to obtain a skin-beautifying effect, there is a high risk of laser light entering the eyes. Furthermore, since the laser light irradiation area is spot-like, a long treatment time is required to obtain a skin-beautifying effect over a wide area.

Therefore, a light-emitting diode matrix device composed of a large number of light-emitting diodes has been devised as a simpler and safer device while maintaining the skin-beautifying treatment effect by light. This is because the light from the light-emitting diode activates the cells that produce the collagen of the skin, removes fine wrinkles, gives the skin firmness, and prevents aging. A device that realizes this has been invented (for example, Patent Document 3). However, this device requires water to flow over the entire irradiation surface in order to cool the heat generated in the light-emitting diode matrix, and the device only becomes large. It cannot be used in treatment rooms where water is not available. In addition, appropriate water flow management is required. In order to improve this, an air cooling method using a fan has been invented (for example, Patent Document 4), which is equipped with a cooling forced fan on the back of the irradiation body. For this reason, the sound of the fan is troublesome for the subject who receives treatment for a long time, and there is a feeling of blockage due to the front of the face being blocked by the fan.
US5728090 (first page) JP 2002-065875 (4th page)

(Means of Claim 1) In order to solve the above problems, a planar light irradiation apparatus according to the present invention is a planar light irradiation apparatus having a semi-cylindrical form, and a plurality of light emitting diodes are arranged on the inner surface. The light emitting diode arrays arranged in a shape are arranged in a plurality of rows with gaps between the light emitting diode arrays in a direction perpendicular to the light emitting diode arrays to form a light emitting diode matrix that emits light toward the inside, and the light emitting diode arrays are arranged between the light emitting diode arrays. The gap area occupies 5 to 35% of the total area of the light emitting diode matrix.

(Means of Claim 2) Further, in the planar light irradiation apparatus according to the present invention, the average irradiation density per unit area is 4 to 20 mW / cm ² , the total light output is 6 to 32 W, and is adjustable. It is configured as a feature.

(Means of Claim 3) The planar light irradiation apparatus according to the present invention is characterized in that the radius of curvature of the semi-cylindrical shape is 140 mm to 190 mm.

(Means of Claim 4) The planar light irradiation apparatus according to the present invention is characterized in that the light-emitting diode array travels in a direction crossing the face.

(Means of Claim 5) The planar light irradiation apparatus according to the present invention is characterized in that the emission spectrum of at least some of the light emitting diodes is 400 to 900 nm.

Further, the planar light irradiation apparatus according to the present invention is characterized in that the irradiation light wavelength of the light emitting diode is different for each light emitting diode array.

(Means of Claim 7) Further, in the planar light irradiation device according to the present invention, the planar light irradiation device includes an arm for freely moving the planar light irradiation device in three dimensions. Configured as a feature.

According to the present invention, the following excellent effects can be exhibited.
1. According to the first aspect of the present invention, while the light energy necessary for the skin beautifying treatment is irradiated from the light emitting diode matrix to the skin of the subject, the output of the light emitting diode is stabilized and the subject feels uncomfortable due to light heat. The cooling is performed by natural convection of air flowing into the device from the gap between the light emitting diode arrays. Therefore, no special cooling water flow is required. Further, during the treatment time of ten minutes to several tens of minutes, the subject is not bothered by the noise of the cooling fan installed close to the face, and the front part can be seen through from the gap, so there is no feeling of blockage.
2. According to the invention of claim 2 of the present invention, the necessary and sufficient irradiation light quantity for the skin beautifying treatment can be obtained uniformly and can be adjusted according to the photosensitivity of the subject skin.
3. According to the invention of claim 3 of the present invention, an optimum distance can be maintained between the planar light irradiating part and the face, so that uniform and efficient irradiation can be performed and a sufficient cooling effect can be obtained.

4). According to the invention of claim 4 of the present invention, it is possible to irradiate light on the face of the subject who needs the most beautiful skin recovery treatment because it is always exposed to a severe external environment. In addition, since the light emitting diode array runs in a direction crossing across the face and can be arranged in a plurality of rows in the vertical direction to form a planar light irradiation device, it can be easily assembled with a simple member configuration. it can. For this reason, the apparatus can be manufactured at low cost.
5. According to invention of Claim 5 of this invention, the light effective for skin activation can be irradiated. In particular, since red light near 640 nm easily penetrates into the skin, collagen is produced by reaching the dermis cells and activating the cells, so that an excellent skin beautifying effect is obtained.
6). According to the sixth aspect of the present invention, since the light emitting diodes of the light emitting diode array can change the irradiation light wavelength in units of arrays, it is possible to irradiate the subject with light of various wavelengths or simultaneously. Moreover, the light wavelength suitable for an irradiation site can be selected. Furthermore, since the light emitting diodes have the same light emission wavelength at least in the light emitting diode array unit, the apparatus member can be configured simply.
7). According to the invention of claim 7 of the present invention, the irradiation device is fixed to a support such as a stand via an arm that can be moved in three dimensions up and down, left and right, and front and back. And since it can arrange | position simply, the convenience for both a test subject and a treatment person can be improved.

A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a front view showing the relationship between the planar light irradiation device 1 and the subject 100 in this embodiment, and FIG. 2 is an overview. Four vertical frames 4a, 4b, 4c, and 4d that run in the vertical direction for supporting the main body 3 in which the light-emitting diode (hereinafter referred to as LED) matrix 2 (FIG. 3) is arranged are fixed at the top of the head. 5 to one place. The fixture 5 is connected to an arm (not shown) for freely moving the planar light irradiation device 1 three-dimensionally by a known technique. As a result, the apparatus 1 can move freely, and once the installation position is determined, the apparatus 1 does not move easily as long as the subject inadvertently touches. Further, the vertical frames 4 a to 4 d from the coupling portion (fixing tool 5) descend in a parabolic shape and grip the main body portion 3. An opening is provided between the uppermost stage of the main body 3 and the fixture 5 so that the cooling air rising along the face of the subject is discharged upward.

The main body 3 is mainly composed of a main body upper part 3a for irradiating the upper half part of the face, and a lower part 3b for irradiating the cheek part and the neck part continuously connected therebelow. The main body 3 as a whole has a semi-cylindrical shape that covers the front half of the subject 100, and its skeleton is composed of a group of four vertical frames and a group of six long and thin half-hoop-shaped horizontal frames straddling the frame. Inside each horizontal frame 6, a plurality of LEDs 10 (FIG. 5) are arranged in a row on a flexible substrate 11 to form an LED array 12. In this embodiment, one LED array forms one horizontal frame. An LED matrix 2 in which the LEDs 10 are two-dimensionally arranged is configured as an assembly in which the LED arrays 12 are vertically arranged in a plurality of columns.

The radius of curvature of the semi-cylinder forming the skeleton structure of the main body 3 was 150 mm. This is an average horizontal section radius of the subject's face of 89 mm (perimeter of 560 mm), a nose height of 24 mm, and a distance between the nose and the irradiated surface of 37 mm (89 + 24 + 37 = 150). The distance of 37 mm was set such that the nose would not come into contact with the LED due to inadvertent movement of the subject, but it was confirmed that it was appropriate from the viewpoint of uniform irradiation of light from the use examples described later. In this case, the average interval between the cheek portion, the forehead portion, and the irradiated surface, which are the main irradiation sites, was about 45 mm.

Among the LED elements with high versatility, AlGaInP red LEDs (center wavelength 640 nm) having high brightness and wide directivity (wide FWHM, ± 15 degrees) were used. The reason for having wide directivity is that the uniformity of the irradiation intensity at the light receiving portion is not impaired by the diffused light from the adjacent LEDs because the LEDs are arranged discretely. In the LED employed in this embodiment, an intensity angle of 95% (a spread angle at which the irradiation intensity with respect to the vertical direction can be maintained at 95% or more) is obtained by 15 degrees on each side. Accordingly, assuming that the distance between the irradiation surface and the light receiving surface is 45 mm, the irradiation width at which an irradiation intensity of 95% or more is obtained is ± 12.0 mm (tan (15 degrees) × 45 = 12.0). This means that the pitch between the LED arrays in the upper and lower rows, which will be described later, is wider than 10 mm.

The frames of the main body upper portion 3a and the main body lower portion 3b are continuously connected and integrated. The circumferential length of the horizontal frame 6 of the main body 3 is composed of a curved cylindrical portion of 470 mm and flat plate portions of 55 mm each extending linearly in the tangential direction on both sides thereof (therefore, the total circumferential length is 580 mm). The overall length (vertical direction) of the cylinder of the main body 3 is 280 mm.

FIG. 3 is an enlarged view of portion A of the planar light irradiation device 1 of FIG. 1 observed from the subject side. 3, the horizontal frames 6a, 6b... Run in the horizontal direction, and the horizontal frames are attached to the vertical frame 4. In the figure, four LEDs 10a, 10b, 10c, and 10d on the horizontal frame 6a form a group, and power is supplied from the electric wires 13a and 13b. Further, the height (width) of the horizontal frame 6 in one row is 7 mm, and a gap 7 as an air circulation groove of 3 mm is provided at the top and bottom, and therefore the pitch of the LED between the top and bottom is 10 mm. The main body is divided into two equal parts, and this array is arranged in parallel in 14 rows for both the upper part 3a and the lower part 3b.

The LED arrangement pitch on the LED array was set to an average of 6 mm, which is denser than the vertical arrangement pitch of 10 mm of the horizontal frame. The irradiation density was 20 mW / cm ^{2 at} maximum. In this embodiment, since the total irradiation area is 1344 cm ² from the arrangement of LEDs described later, the current driving circuit was designed so that the total output as light is 27 W at the maximum and the output is variable.

A schematic diagram of the electrical wiring is shown in FIG. 4, in which four LEDs are connected in series, and a plurality of columns are arranged in parallel as a group, and current is supplied from the main wirings 14a and 14b. FIG. 5 is a view taken along the line B-B in FIG. 1 and shows a cross-sectional view of one horizontal frame 6. On the outermost layer, a rigid aluminum fixing plate 20 also serving as a cooling fin (heat sink) is formed in a hoop shape. Inside, a flexible substrate 11 is provided as an intermediate layer, and a plurality of LEDs 10 are mounted thereon to form an LED array 12. A transparent protective cover 21 is provided in the innermost layer to prevent unnecessary contact between the subject 100 and the LED 10.

In the upper part 3a of the main body, 72 LEDs / column are arranged almost uniformly over the circumferential length of 432mm centering on the front of the face, thereby forming an array of 14 rows in the vertical direction. . In the lower part 3b of the main body, the circumferential length of the LED array portion is slightly longer, and 88 LED arrays / row are arranged over a circumferential length of 528 mm and arranged in 14 rows. Therefore, in this embodiment, the matrix 2 is composed of a total of 2240 LEDs (72 × 14 + 88 × 14), and in this embodiment, the LED density is about 1.7 / cm ² .

Next, the effect of the gap 7 according to the present invention will be described. The flow of air by natural convection will be described with reference to FIG. Most of the amount of heat generated by the LED is sucked into the outermost aluminum fixing plate (also serving as a heat sink) 20 and cooled by the naturally rising air flow 30 flowing outside thereof. The remaining calorific value is radiated inward toward the subject 100. Therefore, ascending airflow is also generated inside the main body 3, and the air 31 flows up from below the main body lower part 3b, rises between the subject 100 and the main body 3, and is exhausted from the top opening of the main body upper part 3a. The However, in such an apparatus that does not have the gap (air flow groove) 7 according to the present invention, the skin temperature of the subject's cheek is not close to the average body temperature because the skin of the subject's 100 is not sufficiently cooled. The subject's whole body sweated and complained of discomfort. Therefore, the present inventor has earnestly studied an apparatus that can sufficiently maintain the beauty recovery effect without causing a burden on the subject, and has reached the present invention. In the present invention, the gaps 7 are provided between the horizontal frames 6, from which the air flow 33 flows into the main body 3, joins the air flow 31, and is discharged as the exhaust flow 32.

(Use Example 1) In order to examine the effect and optimum value of the gap 7, the apparatus of the first embodiment shown in FIGS. 1 to 5 was used. The adjustment of the gap was based on closing part or all of the gap 7. In both experiments, the room temperature was 25 ° C., the temperature of the subject's cheek and forehead at the start of irradiation was about 33.8 ° C., and the body temperature of the armpit was 36.5 ° C. The time for irradiating the subject with light was 15 minutes. The amount of irradiation light was adjusted to 18 mW / cm ² . FIG. 6 (a) shows the temperature rise curves of the cheek and forehead at 30% gap (3mm gap is provided for each horizontal frame with respect to 7mm horizontal frame width) when the gap is 0%. Are shown in F and G, respectively. In addition, the body temperature of the subject before the start of irradiation is indicated by H. As a result, when the gap was 0% and 30%, the reached temperatures of the forehead were 37.8 ° C (G) and 37.6 ° C (E), respectively. There was a clear difference. In either case, the subject felt pain from above 37.0 ° C., but was stronger when the gap was 0%.

The final temperature reached at the cheek was 36.7 ° C. (F) and 36.3 ° C. (D), both of which were close to body temperature, but a difference was observed. However, more than that, the subject complained of sweating on the back from around 7 minutes after the start of irradiation when the gap was 0%. This may be because blood circulation throughout the body has a cooling and homogenizing effect on the skin temperature, carrying away the amount of heat generated locally and dissipating it as sweat. Therefore, although the temperature rise itself at the irradiated site is alleviated, the amount of heat received by the skin leads to sweating at other sites, and therefore it is estimated that the subject's discomfort has increased when the gap is 0%. Conventionally, as an index of photothermal reaction when a local part of a living body is irradiated with laser light, (1) protein denaturation occurs when the skin temperature exceeds 42 ° C., and this temperature should not be greatly exceeded. (2) 40 It is known that the skin is activated when the temperature is below ℃. However, when irradiating a wide area such as the entire face, this conventional index does not apply, and the amount of sweating increases rapidly when the skin surface temperature exposed to the subject's outside air approaches the body temperature. It has been found by the present inventor this time that pain is felt at a site beyond the above.

FIG. 6 (b) shows the temperature reached to the cheek after 15 minutes in various gaps. As a result, with regard to the gap value, if the cheek is maintained at 5% or more so that the body temperature can be kept below the body temperature, the subject's discomfort associated with the photothermal reaction can be tolerated with an irradiation time (treatment time) of about ten minutes. Met. On the other hand, if the gap is made too large, the irradiation density decreases and uniformity cannot be obtained. Therefore, it seems that the limit is about 35% where the cooling effect is saturated.

(Use Example 2) The distance between the main body 3 and the subject 100 was examined. The result is shown in FIG. 7, and two peaks were obtained. This seems to have caused such a phenomenon due to the relationship between the LED light diffusion angle and the arrangement pitch, but in any case, the light irradiation density around 30 to 80 mm from the irradiation surface is high, and the irradiation intensity decreases before and after that. is doing. From this, it was confirmed that a semi-cylindrical shape having a radius of curvature of 140 to 190 mm with a head radius of 89 mm, a nose height of 24 mm and a gap of about 30 to 80 mm was desirable.

(Use Example 3) From the examination results in Use Examples 1 and 2, 20 subjects were treated at a pace of 15 minutes × twice a week using the apparatus according to the present invention. In addition, there was a difference in the photosensitivity of the skin depending on the subject, and redness was recognized on the face immediately after the treatment in the subject with high photosensitivity. The balance of over exposure and therefore treatment effect was adjusting the amount in the range of 4~20mW / cm ² corresponding to the subject (at lower irradiation dose than 4 mW / cm ² was observed treatment effect). As a result, there was no complaint of special discomfort, and 15 subjects complained of skin gloss recovery and rejuvenation 7 to 10 times, and recognized the effect of the present invention.

Next, a second embodiment will be described. In this embodiment, first, the upper and lower parts of the main body of the first embodiment described above are each in 10 rows (therefore, the cylindrical length of this portion is 200 mm), and a 640 nm red LED is arranged in this portion. Further below that, a third portion for irradiating the upper chest was provided. This part also has the same radius of curvature as the main part, but the circumferential length is 400 mm, the LEDs are ± 180 mm centered on the front, and LED arrays are arranged in 20 rows at the same pitch as the main part (thus, this part The height is 200 mm).

Furthermore, the LED of the third part is an alternating arrangement of the above-mentioned red 640 nm LED array and a new 830 nm near infrared LED array. The reason why the near-infrared LED is arranged in this portion is to utilize the action of the near-infrared ray on nerves and blood vessels. When irradiating a facial part, red, which is visible light, is desirable from the viewpoint of eye safety, but near infrared rays can be used for parts far from the eye. This near-infrared ray improves the flow of blood and lymph and also improves the flow of fluid in nerve cells and removes pain-causing substances, so that pain in the neck, shoulders and chest can be alleviated. Since LEDs of two types of wavelengths are alternately arranged, the arrangement pitch in the height direction of LEDs of the same wavelength is 20 mm, but this part is further away from the irradiation surface with the neck as the main component, and the LED light is more The problem of uniformity is small because it spreads.

If the ratio of the gap area to the total irradiation area can be maintained at 5 to 35%, it is not always necessary to provide a gap for each LED array. Although the gap may be provided in the vertical direction, the air flow must be taken into consideration so that sufficient cooling can be obtained for all the LEDs. Since it is easier to obtain uniform cooling by cooling with an air flow rising by natural convection, generally a lateral gap is desirable as shown in the embodiment. Further, FIG. 8 shows a third embodiment using a horizontal frame having a new form. In the drawing, the LED arrays are arranged in the vertical direction at a pitch of 10 mm as in the first embodiment. For example, the horizontal frame 6a 'is configured by an array of three rows of LED arrays 10a', 10b ', and 10c'. Accordingly, the width of the horizontal frame 6a 'is 27 mm, and the next horizontal frame 6b' is disposed below it with a gap of 3 mm. The LED arrays 10a 'and 10b', 10b 'and 10c' are not completely separated, but an elongated slit-shaped gap 7 'is provided in the array direction instead. The gap 7 'is provided in a staggered pattern as shown in the figure. The area ratio of the gap to the total irradiation area is reduced as compared with the first embodiment, but still has a gap area of around 25%. With this configuration, the slit-shaped gap 7 'in the horizontal frame can be manufactured by punching, leading to a reduction in the overall cost of the apparatus.

Furthermore, it has been found that it is not desirable to increase the irradiation area without changing the amount of irradiation light per unit area. This is because the amount of heat directly delivered to the subject by radiation and convection, or the amount of heat converted from light in the body is carried away by the circulating blood and finally dissipated in the form of perspiration, etc. Has a limit as a biological mechanism. Therefore, the total amount of light irradiated to the subject is also restricted, and the result of research by the present inventor has desired 32 W or less. What is necessary is just to irradiate a required site | part within this irradiation total light quantity.

As mentioned above, although embodiment of this invention was described, it is not restricted to these embodiment, It is applied variously within the range of the technical idea. For example, the LED matrix may be formed by arranging vertical LED arrays in a plurality of rows and providing gaps between adjacent arrays. In this case, the semi-cylindrical shape is further divided into two parts (that is, each is a 1/4 cylindrical shape), and a hinge is provided at the center to connect the two, so that the planar light illuminators on both sides are connected to birds It can be opened and closed like a wing. Furthermore, if the movement distance of the arm in the vertical direction is increased, it can be applied to parts other than the face, for example, the chest and legs. Therefore, in this case, an LED that emits light of another wavelength that is effective for the treatment of the part may be coexisted, such as arranging 465 nm blue light that has an anti-inflammatory effect or a purification effect on the skin, and is suitable for the wavelength. A therapeutic effect can be obtained. Moreover, even if it is exclusive for a face, you may make it cover to an ear | edge part. There are also so-called acupoints in the ear, and this part can be stimulated with light energy. Further, the intensity angle of irradiation of the light emitting diode is not limited to ± 15 degrees shown in the first embodiment, and a wider angle can be used. However, at this time, the LED arrangement pitch, the distance from the irradiated surface to the non-irradiated body, and the light output value of the unit LED must be selected so that uneven irradiation does not occur.

However, the main aim of the present invention is a skin beautifying treatment that is particularly conspicuous. Therefore, it is necessary to ensure the safety of the eyes, and it is based on orange to red light of 590 to 770 nm which is visible light. . Furthermore, it is desirable to irradiate near infrared rays that relieve stiffness and pain, and blue light that subsides the inflammation of the wound, so that it is selected from diodes that emit light having a wavelength of 400 to 900 nm. It is desirable. Further, since the contents to be treated are almost determined by the body part, if the color light of the light emitting diodes mounted on the array unit can be selected, an efficient treatment can be provided with an inexpensive device.

Further, in the present embodiment shown in FIG. 1, the subject is in the sitting position, but may lie on the bed or the like and irradiate from above. Further, the connecting and fixing portion between the main body and the arm is not limited to the fixing portion at the top of the head in FIG. The semi-cylindrical shape is a shape obtained by vertically dividing a cylindrical pipe, and may be any shape as long as it can match the shape of a human face, and does not require that the cross section be a strict circle. Furthermore, when the irradiation device is configured with several flat LED matrix surfaces such as a trihedral mirror, the average distance of each irradiation surface is 140 to 190 mm from the virtual center that is the intersection of the vertical lines of each surface. What is necessary is just to form.

Further, instead of an aluminum fixing plate that also serves as a grip for the LED array and a heat sink, a thermally conductive ceramic plate having high thermal conductivity and high rigidity may be used. In addition, the light irradiation may be pulsed light that is not constantly lit but flashes in a short period of time. In this case, since a stronger irradiation intensity can be obtained instantaneously, the light can reach deeper skin under the epidermis. it can. Further, an alarm may be issued by measuring the skin temperature of the subject, or the amount of power for irradiation or the irradiation time interval in the case of pulse blinking may be automatically adjusted based on the temperature measurement result. In the embodiment, the LEDs are arranged in a rectangular lattice pattern, but a staggered arrangement of rhombuses may be used. Further, the upper part of the main body may be partially conical along the vertical frame of FIG. 1 according to the shape of the top of the subject's head.

It is the front view which showed the main-body part and test subject's relationship in 1st embodiment in connection with this invention. It is an outline figure of a first embodiment. It is the elements on larger scale inside a main-body part which shows the arrangement | sequence state of LED matrix. It is the partial schematic of the electrical wiring of LED matrix. It is the schematic which shows a LED array (BB view of FIG. 1). It is a figure which shows the relationship between the space | interval between LED arrays, and the temperature rise of a test subject's cheek part and forehead part. It is a figure which shows the relationship between the space | gap between LED arrays, and the test subject cheek part temperature after 15-minute irradiation. It is a figure which shows the relationship between the distance from an irradiation main-body part, and the irradiation intensity | strength in a non-irradiation site | part. It is a figure which shows another embodiment of a horizontal frame.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Planar light irradiation apparatus 2 LED matrix 3 Main-body part 4 Vertical frame 5 Fixing tool 6 Horizontal frame 7 Gap 10 LED
11 Flexible substrate 12 LED array 20 Fixed plate 30, 31, 32, 33 Air flow 100 Subject

Claims (7)

In a planar light irradiation device having a semi-cylindrical shape, a plurality of light emitting diode arrays in which a plurality of light emitting diodes are arranged in a row on the inner surface are provided with a gap between the light emitting diode arrays in a direction perpendicular thereto. A light emitting diode matrix that irradiates light inward is formed in a row, and the area of the gap between the light emitting diode arrays occupies 5 to 35% with respect to the total area of the light emitting diode matrix. Planar light irradiation device. The planar light irradiation apparatus according to claim 1, wherein an average irradiation density per unit area is 4 to 20 mW / cm ² , a total light output is 6 to 32 W, and is adjustable. The planar light irradiation device according to claim 1 or 2, wherein the semi-cylindrical curvature radius is 140 mm to 190 mm. The planar light irradiation device according to claim 1, wherein the light emitting diode array travels in a direction crossing across the face. The planar light irradiation device according to any one of claims 1 to 4, wherein an emission spectrum of at least a part of the light emitting diodes is 400 to 900 nm. The planar light irradiation apparatus according to claim 1, wherein an irradiation light wavelength of the light emitting diode is different in units of the light emitting diode array. The planar shape according to any one of claims 1 to 6, wherein an arm for freely moving the planar light irradiation device in three dimensions is provided in the planar light irradiation device. Light irradiation device.

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