JP2023011076A - Light irradiation device - Google Patents

Abstract

To provide a light irradiation device capable of efficiently executing a health maintenance method using light.SOLUTION: A light irradiation device of the present invention includes a body part 2, a mounting part 3, and an irradiation part 4. The mounting part 3 is attached to the body part 2, and mounts the body part 2 onto the face F of a user P. The irradiation part 4 is provided in the body part 2 and irradiates the cornea 51 of the user P mounted with the body part 2 through the mounting part 3 with irradiation light L. The luminous intensity on the surface of the cornea 51 of the illumination light L is in the range of about 12000 lx at the maximum. As a result, the present invention can efficiently execute a health maintenance method using light.SELECTED DRAWING: Figure 17

Description

The present invention relates to a light irradiation device.

It is known that a person's biorhythm (body clock) is reset by exposure to high-intensity light. Therefore, high-intensity light irradiation is effective in improving abnormal biological rhythms caused by irregular sleeping habits, shift work, jet lag, and the like. In the following description, the action of irradiating high-intensity light in order to improve such abnormal biological rhythms will be referred to as a photohealth maintenance method. In addition, light health maintenance methods may be used to treat seasonal affective disorders, endogenous depression, circadian rhythm sleep disorders, and the like. For example, in the light irradiation device described in Patent Literature 1, the user is irradiated with light of high illuminance. In addition, the light irradiation device described in Patent Literature 1 can reduce the user's stress by ensuring freedom of movement for the user during the implementation of the light health maintenance method.

Japanese Patent No. 6061216

In such a light irradiation device, it is important that the photohealth maintenance method can be performed efficiently.

A problem to be solved by the present invention is to provide a light irradiation device capable of efficiently performing a light health maintenance method.

The light irradiation device of the present invention comprises a main body, a mounting part attached to the main body for mounting the main body on a user's face, and a main body provided in the main body for and an irradiation unit that irradiates light onto the cornea of the user wearing the illuminator, and the illuminance of the irradiation light emitted from the irradiation unit on the surface of the cornea is in the range of up to about 12000 lx.

The light irradiation device of the present invention comprises a main body, a mounting part attached to the main body for mounting the main body on a user's face, and a main body provided in the main body for and an irradiating section that irradiates the cornea of the user wearing the eyepiece, and the ratio of the blue component in the irradiation light emitted from the irradiating section is in the range of about 50% or less.

In the light irradiation device of the present invention, the blue component of the irradiation light is preferably a blue component with a wavelength in the range of about 355 nm to about 490 nm.

In the light irradiation device of the present invention, it is preferable that the irradiation section has an optical filter that makes the blue component of the irradiation light in the range of about 50% or less.

The light irradiation device of the present invention comprises a main body, a mounting part attached to the main body for mounting the main body on a user's face, and a main body provided in the main body for and an irradiation unit that irradiates the cornea of the user wearing the cornea, and the irradiation angle in the vertical section formed by the central axis of the irradiation light emitted from the irradiation unit on the surface of the cornea and the optical axis of the eyeball is about characterized in that it ranges from 0° to about 35°.

In the light irradiation device of this invention, it is preferable that the irradiation section is composed of an LED, and the central axis of the irradiation light emitted from the irradiation section is the central axis of the LED.

The light irradiation device of the present invention comprises a main body, a mounting part attached to the main body for mounting the main body on a user's face, and a main body provided in the main body for and an irradiation unit that irradiates light onto the cornea of the user wearing the cornea, and the irradiation distance between the irradiation unit and the surface of the cornea in a vertical cross section is in the range of about 35 mm or less.

In the light irradiation device of the present invention, it is preferable that the irradiation section is composed of an LED having a light emitting surface, and the irradiation distance is the distance between the light emitting surface of the LED and the surface of the cornea.

In the light irradiation device of the present invention, the mounting portion includes a nose pad attached to the central portion of the body portion, left and right hinges each having one end attached to both ends of the body portion, and Left and right temples rotatably attached to the other end of the hinge, respectively, and the nose pad is composed of parts of the same size or parts of a plurality of sizes according to the size of the user's face. The main body, irradiation unit, and left and right temples are composed of parts of the same size, and the left and right hinges are composed of parts of multiple sizes according to the size of the user's face. It is characterized by

In the light irradiation device of the present invention, when the left and right hinges of a plurality of sizes are attached to the main body by the first attachment portion, the main body and the left and right hinges of a plurality of sizes come into contact with each other on the first mounting surface. It is preferable that the mounting angles between the extension line and the line segment connecting the first mounting portions of the left and right hinges are at least two different angles for a plurality of sizes of the left and right hinges.

In the light irradiation device of the present invention, when the left and right hinges of a plurality of sizes are attached to the main body by the first attachment portion, the main body and the left and right hinges of a plurality of sizes contact each other on the first mounting surface. and a second mounting surface where the left and right hinges of a plurality of sizes and the left and right temples contact each other when the left and right hinges are attached to the left and right hinges of a plurality of sizes by the second mounting portion. Preferably, the distance is different for each of the left and right hinge sizes.

In the light irradiation device of the present invention, it is preferable that the irradiation section is composed of an LED that emits simulated natural light.

The light irradiation device of the present invention can efficiently implement the light health maintenance method.

FIG. 1 is a usage state diagram showing an embodiment of a light irradiation device according to the present invention. FIG. 2 is a usage state diagram showing a state in which the blindfold shade is attached and used. FIG. 3 is a perspective view showing a state in which the light irradiation device is viewed obliquely from above. FIG. 4 is a perspective view showing an exploded state of the light irradiation device as viewed obliquely from above. FIG. 5 is a perspective view showing a disassembled state of the light irradiating device, viewed obliquely from below. FIG. 6 is a perspective view (a perspective view seen from a different angle from FIG. 5) showing a state of size exchange (size development) of the light irradiation device as seen from obliquely below. FIG. 7 is a plan view showing a state in which hinges of three sizes are attached to the light irradiation device. (A) is a plan view showing a state in which an S size hinge is attached to the light irradiation device. (B) is a plan view showing a state in which an M size hinge is attached to the light irradiation device. (C) is a plan view showing a state in which the L size hinge is attached to the light irradiation device. FIG. 8 is a bottom view showing a state in which hinges of 3 sizes are attached to the light irradiation device. (A) is a bottom view showing a state in which an S size hinge is attached to the light irradiation device. (B) is a bottom view showing a state in which an M size hinge is attached to the light irradiation device. (C) is a bottom view showing a state in which the L size hinge is attached to the light irradiation device. FIG. 9 is an explanatory bottom view showing the difference in the position (arrangement) of temples when hinges of three sizes are attached to the light irradiation device. FIG. 10 is a bottom view showing a state in which hinges of three sizes are attached to temples. (A) is a bottom view showing a state in which an S size hinge is attached to a temple. (B) is a bottom view showing a state in which an M size hinge is attached to a temple. (C) is a bottom view showing a state in which an L size hinge is attached to a temple. FIG. 11 is a perspective view showing a state in which hinges of three sizes are attached to temples. (A) is a perspective view showing a state in which an S size hinge is attached to a temple. (B) is a perspective view showing a state in which an M size hinge is attached to a temple. (C) is a perspective view showing a state in which an L-sized hinge is attached to a temple. FIG. 12 is a vertical cross-sectional view (cross-sectional view taken along the line XII-XII in FIG. 9) showing how the main body, hinges, and temples of the light irradiation device are attached. FIG. 13 is an explanatory bottom view showing the mounting angle between the first mounting surface and the reference line. FIG. 14 is an explanatory bottom view showing the mounting distance between the first mounting surface and the second mounting surface. FIG. 15 is an explanatory diagram showing changes in the amount of melatonin in clinical evaluation test results on melatonin suppression. The vertical axis is the amount of melatonin "pg/ml". The horizontal axis is time "h". FIG. 16 is an explanatory diagram showing a significant difference list of melatonin inhibitory effects. FIG. 17 is an explanatory diagram showing the detailed specifications of the direct irradiation system tester (the light irradiation device of the present invention) on which a clinical evaluation test on melatonin suppression was conducted. FIG. 18 is an explanatory diagram showing the irradiation angle in the vertical section formed by the central axis of the irradiation light emitted from the irradiation section and the optical axis of the eyeball, and the irradiation distance between the irradiation section and the surface of the cornea in the vertical section. (Image diagram of an irradiation unit). FIG. 19 is an explanatory diagram (image diagram) showing a state in which the irradiation light emitted from the irradiation unit enters (enters) the eyeball. FIG. 20 is an explanatory diagram showing the spectral spectrum on the surface of the cornea of the direct irradiation system tester (the light irradiation device of the present invention) in which a clinical evaluation test on melatonin suppression was conducted. The vertical axis is the spectral irradiance "W/m ² /nm". The horizontal axis is the wavelength "nm".

An example of an embodiment (example) of a light irradiation device according to the present invention will be described in detail below with reference to the drawings. In the drawings, since they are schematic diagrams, illustration of part of the parts is omitted, part of hatching is omitted, or part of the cross section is omitted. 10 to 14 show the left hinge and left temple, and the right hinge and right temple are denoted by ( ).

(Explanation of configuration of embodiment)
The configuration of a light irradiation device 1 (hereinafter referred to as "light irradiation device 1") according to this embodiment will be described below. The light irradiation device 1 is a wearable type that is detachably attached to the face F of the user P, as shown in FIGS. 1 and 2 .

The light irradiation device 1 includes a body portion 2, a mounting portion 3, and an irradiation portion 4, as shown in FIGS. 1 to 9, 12 and 13. FIG. The light irradiation device 1 irradiates the eyes E of the user P with light (hereinafter referred to as “irradiation light”) L from the irradiation unit 4 . A human eye E consists of an eyeball 5, an optic nerve (not shown), and an eyelid 50 as an appendage. The eyeball 5 has a cornea 51, a pupil 52, a vitreous body 53, and a retina 54, as shown in FIGS. 18 and 19, reference numeral 55 denotes the optical axis (ocular axis) of the eyeball 5. FIG.

(Description of main body 2)
As shown in FIGS. 1 to 9, 12 and 13, the main body 2 is composed of a structure in which left and right lens shapes (rims) and a bridge connecting the left and right lens shapes are integrally formed. . The main body 2 is composed of parts (main body) of the same size. The body portion 2 is composed of an upper portion 2U and a lower portion 2D in this example. Moreover, the main body part 2 has a hollow structure in this example.

The main unit 2 has a USB terminal (not shown) for detachably connecting the Micro-USB cable 20 and a power switch 21 . By connecting the Micro-USB cable 20 to a PC or a USB charger (not shown) and the USB terminal of the main unit 2, preparation for supplying power to the irradiation unit 4 is completed.

In this example, as shown in FIG. 2, a shade 22 can be detachably attached to the main body 2. As shown in FIG. The shade 22 covers the eyes of the user P to which the light (hereinafter referred to as “irradiation light”) L from the irradiation unit 4 is irradiated.

(Explanation of Mounting Part 3)
As shown in FIGS. 1 to 14, the mounting portion 3 is attached to the body portion 2, and the body portion 2 is detachably mounted on the face F of the user P. As shown in FIG. The mounting portion 3 has a nose pad 30, left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L), and left and right temples 33, . Although the hinge is sometimes called an end piece, it is called a hinge in this specification and the appended claims and abstract.

The nose pad 30 is attached to the central portion of the inner surface of the main body 2 (the surface facing the face F of the user P), as shown in FIGS. 1 and 5 to 9 . The nose pads 30 fix the body part 2 and the irradiation part 4 to the face F of the user P by sandwiching the left and right sides of the nose N of the user P.

The nose pad 30 in this example is composed of parts (nose pads) of the same size as the main body 2 . The nose pad 30 may be composed of parts (nose pads) having a plurality of sizes according to the size of the face F of the user P.

The left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) are, as shown in FIGS. consists of parts (hinges) of three sizes (S size, M size, L size).

That is, the left and right hinges 31 and 32 are composed of S size left and right hinges 31S and 32S, M size left and right hinges 31M and 32M, and L size left and right hinges 31L and 32L. One end portions of the left and right hinges 31 and 32 are detachably attached to both left and right end portions of the main body portion 2 by the first attachment portions 6, respectively.

The left and right hinges 31 and 32 may be composed of parts (hinges) of two sizes, or parts (hinges) of four or more sizes.

As shown in FIGS. 7 to 11, the left and right temples 33 and 34 are made up of parts (cranes) of the same size as the main body 2 and the nose pad 30 . One ends of the left and right temples 33 and 34 of the same size are attached to the other ends of the left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes, and the second mounting portions 7 are rotatably attached to each other.

As shown in FIGS. 1 and 2, the left and right temples 33 and 34 are attached to the main body 2 together with the nose pad 30 by putting the other ends of the left and right temples 33 and 34 on the left and right ears Y of the user P. and the irradiation unit 4 is detachably attached to the face F of the user P.

(Description of irradiation unit 4)
As shown in FIGS. 5 to 9, 18, and 19, the irradiation units 4 are provided on the left and right sides of the inner surface of the main body 2, and the main body 2 is mounted via the mounting portion 3. The cornea 51 of the user P is irradiated with the irradiation light L. The irradiation section 4 is composed of parts (irradiation section) of the same size as the body section 2, the nose pad 30, and the left and right temples 33 and 34. As shown in FIG.

The irradiation unit 4 has a substrate 40 attached to the main body 2 and an LED 41 as a light source mounted on the substrate 40 . The LED 41 has a light emitting surface 42 . The cornea 51 of the user P is irradiated with the irradiation light L from the light emitting surface 42 of the LED 41 . As the light source of the irradiation unit 4, a self-luminous semiconductor light emitting element (semiconductor light emitting element) type light source such as OLED (organic EL) may be used other than the LED in this example.

(Explanation of irradiation light L)
The irradiation light L emitted from the light emitting surface 42 of the LED 41 of the irradiation unit 4 to the cornea 51 of the user P will be described below. The illuminance of the irradiation light L on the surface of the cornea 51 of the user P is in the range of about 12000 lx at maximum. The illuminance of this irradiation light L is based on IEC62471:2006/JIS C7550:2011.

Moreover, as shown in FIG. 20, the ratio of the blue component of the irradiation light L is about 50% or less. The blue component of the illumination light L is a blue component with wavelengths from about 355 nm to about 490 nm. That is, the irradiation unit 4 has an optical filter (not shown) such as a blue light cut film that reduces the blue component of the irradiation light L to about 50% or less. The optical filter is arranged in front of the light emitting surface 42 of the LED 41, that is, on the side in which the irradiation light L is irradiated.

Furthermore, the illumination light L has a spectral distribution very close to that of simulated natural light, that is, sunlight, as shown in FIG.

As shown in FIG. 18, an irradiation angle θ1 in a vertical cross section formed by the central axis (optical axis) Z of the irradiation light L emitted from the irradiation unit 4 on the surface of the cornea 51 of the user P and the optical axis 55 of the eyeball 5 is ranges from about 0° to about 35°. The central axis Z of the irradiation light L is the central axis of the LED 41 (the central vertical line of the light emitting surface 42).

Further, as shown in FIG. 18, the irradiation distance T1 between the irradiation unit 4 and the surface of the cornea 51 in the vertical section is in the range of approximately 35 mm or less. The irradiation distance T1 is the distance between the light emitting surface 42 of the LED 41 and the surface of the cornea 51 .

(Description of the first mounting portion 6)
The first mounting portion 6 includes a first mounting portion on the main body portion 2 side, first mounting portions on the left and right hinges 31 and 32 sides, a first mounting screw 60, a first mounting nut 61, a washer 62, consists of

The first mounting portions on the body portion 2 side are provided at both left and right end portions of the body portion 2, respectively. That is, the first mounting surfaces 23 are provided on the inner side surfaces of the left and right end portions of the body portion 2 . A rectangular parallelepiped (or cubic) first insertion recess 24 is provided on each of the first mounting surfaces 23 on the left and right ends of the main body 2 . Cylindrical first mounting holes 25 are provided at both left and right ends of the main body 2 so as to intersect with the first insertion recesses 24 respectively. The first attachment hole 25 penetrates through the lower portion 2D of the main body portion 2 and does not penetrate through the upper portion 2U of the main portion 2 .

The first mounting portions on the left and right hinges 31 and 32 are provided at one ends of the left and right hinges 31 and 32, respectively. That is, first mounting surfaces 310 and 320 that contact the first mounting surface 23 on the main body 2 side are provided on the end surfaces of the left and right hinges 31 and 32, respectively. First mounting surfaces 310 and 320 at one end of the left and right hinges 31 and 32 are provided with rectangular parallelepiped (or cubic) first insertion protrusions 311 and 321 to be inserted into the first insertion recess 24, respectively. ing. Cylindrical first mounting holes 312 and 322 are provided at one ends of the left and right hinges 31 and 32 so as to intersect the first insertion projections 311 and 321, respectively. The inner diameters of the first mounting holes 312, 322 of the left and right hinges 31, 32 and the inner diameter of the first mounting hole 25 of the main body 2 substantially match.

First mounting nut fitting recesses 313 and 323 are provided at the edges of the first mounting holes 312 and 322 on the upper surfaces of the first insertion projections 311 and 321, respectively. The first mounting nut 61 is fitted in the first mounting nut fitting recesses 313 and 323 .

The first mounting portion 6 is configured as described above, and how to mount it will be described below. First, the first insertion protrusions 311 and 321 of the left and right hinges 31 and 32 are inserted into the first insertion recesses 24 of the main body 2 . Next, the first mounting surface 23 of the main body 2 and the first mounting surfaces 310, 320 of the left and right hinges 31, 32 are brought into contact with each other. At this time, the first mounting holes 25 of the main body 2 and the first mounting holes 312, 322 of the left and right hinges 31, 32 are aligned.

Then, the washer 62 is set on the edge of the first mounting hole 25 in the lower portion 2D of the body portion 2. As shown in FIG. Subsequently, the first mounting screw 60 is inserted into the washer 62, the first mounting hole 25 of the lower portion 2D of the main body 2, and the first mounting holes 312, 322 of the left and right hinges 31, 32, and the first mounting nut is inserted. Screw in 61. Thereby, as shown in FIG. 12, one ends of the left and right hinges 31 and 32 are detachably attached to the left and right ends of the main body 2 by the first attachment portions 6, respectively. At this time, the tip of the first mounting screw 60 is housed in the first mounting hole 25 in the upper portion 2U of the body portion 2. As shown in FIG. Also, the head of the first mounting screw 60 is housed in a recess in the lower surface of the lower portion 2</b>D of the main body 2 .

Then, as shown in FIG. 13, extension lines L1 of the first mounting surfaces 23, 310, 320 where the main body 2 and the left and right hinges 31, 32 contact each other, and the first mounting surfaces of the left and right hinges 31, 32 The angle θ2 between the center of the portion 6 (the center line of the first mounting screw 60 in plan view (upper view)) and the line segment L2 is defined as the mounting angle θ2.

(Description of the second mounting portion 7)
The second mounting portion 7 is composed of a first mounting portion on the left and right hinges 31 and 32 side, a second mounting portion on the left and right temples 33 and 34 side, a second mounting screw 70 and a second mounting nut 71. It is configured.

The second mounting portions on the left and right hinges 31 and 32 sides are provided at the other ends of the left and right hinges 31 and 32, respectively. That is, the second mounting surfaces 314 and 324 are provided on the end surfaces of the other ends of the left and right hinges 31 and 32, respectively. Second mounting surfaces 314 and 324 at the other ends of the left and right hinges 31 and 32 are provided with rectangular parallelepiped (or cubic) second insertion recesses 315 and 325, respectively. Cylindrical second mounting holes 316 and 326 are provided at the other ends of the left and right hinges 31 and 32 so as to intersect with the second insertion recesses 315 and 325, respectively.

The second mounting portions on the left and right temples 33, 34 are provided at one ends of the left and right temples 33, 34, respectively. That is, second mounting surfaces 330 and 340 that abut on the second mounting surfaces 314 and 324 of the left and right hinges 31 and 32 are provided on the end surfaces of one ends of the left and right temples 33 and 34, respectively. Second mounting surfaces 330 and 340 at one end of the left and right temples 33 and 34 are provided with rectangular parallelepiped (or cubic) second insertion projections 331 and 341 to be inserted into the second insertion recesses 315 and 325, respectively. is provided. Cylindrical second mounting holes 332 and 342 are provided at one ends of the left and right temples 33 and 34 so as to intersect with the second insertion protrusions 331 and 341, respectively. The inner diameters of the second mounting holes 332, 342 of the left and right temples 33, 34 and the inner diameters of the second mounting holes 316, 326 of the left and right hinges 31, 32 substantially match.

The second attachment portion 7 is configured as described above, and how to attach it will be described below. First, the second insertion protrusions 331 and 341 of the left and right temples 33 and 34 are inserted into the second insertion recesses 315 and 325 of the left and right hinges 31 and 32, respectively. Next, the second mounting surfaces 314, 324 of the left and right hinges 31, 32 and the second mounting surfaces 330, 340 of the left and right temples 33, 34 are brought into contact with each other. At this time, the second mounting holes 316, 326 of the left and right hinges 31, 32 and the second mounting holes 332, 342 of the left and right temples 33, 34 match.

Then, the second mounting screws 70 are inserted into the second mounting holes 316 and 326 on the upper side of the left and right hinges 31 and 32, the second mounting holes 332 and 342 of the left and right temples 33 and 34, and the lower sides of the left and right hinges 31 and 32. , and screwed into the second mounting nut 71. Thereby, as shown in FIG. 12, one ends of the left and right temples 33 and 34 are rotatably attached to the other ends of the left and right hinges 31 and 32 by the second attachment portions 7, respectively. At this time, the tip of the second mounting screw 70 and the second mounting nut 71 are accommodated in the recesses on the lower surfaces of the left and right hinges 31 and 32 .

As shown in FIG. 14, first mounting surfaces 23, 310, 320 on which the main body 2 and the left and right hinges 31, 32 contact each other, left and right hinges 31, 32, and left and right temples 33, 34 The distance T2 between the second mounting surfaces 314, 324, 330, and 340 that contact each other is defined as the mounting distance T2.

(Description of mounting angle θ2 and mounting distance T2)
As shown in FIG. 13, when the left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes are attached to the body portion 2 by the first attachment portion 6, the body portion 2 and the left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes contact each other. The mounting angle θ2 sandwiched between the line segment L2 connecting the first mounting portions 6 of (31S, 31M, 31L) and 32 (32S, 32M, 32L) is the left and right hinges 31 (31S, 31M, 31L), 32 ( 32S, 32M, 32L) consist of at least two different corners. In this example, the mounting angle θ2 for the S size and the mounting angle θ2 for the M size are about 5°. The mounting angle θ2 of the L size is approximately 8°.

As shown in FIG. 14, when the left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes are attached to the body portion 2 by the first attachment portion 6, the body portion 2 and three sizes of left and right hinges 31 (31S, 31M, 31L), 32 (32S, 32M, 32L) contact each other with first mounting surfaces 23, 310, 320, and three sizes of left and right hinges 31 (31S, 31M, 31L), 32 (32S, 32M, 32L) when the left and right temples 33, 34 are attached by the second attachment part 7, the left and right hinges 31 (31S, 31M, 31L) of three sizes , 32 (32S, 32M, 32L) and the second mounting surfaces 314, 324, 330, 340 on which the left and right temples 33, 34 abut each other. , 31L) and 32 (32S, 32M, 32L). In this example, the attachment distance T2 for S size is approximately 8.6 mm. The mounting distance T2 for the M size is approximately 17 mm. The attachment distance T2 for the L size is approximately 23.4 mm.

(Explanation of use example of embodiment)
The light irradiation device 1 according to this embodiment is configured as described above, and a usage example thereof will be described below. The light irradiation device 1 according to this embodiment is used when waking up or wanting to wake up. The time to wake up is, for example, the time to wake up in order to reduce (alleviate) jet lag or the like. In addition, as an example of use, there are times other than when you want to wake up or wake up. For example, when returning to a normal life from a night shift such as a night shift, when reducing (reducing) daytime sleepiness, when adjusting the rhythm of life, when improving the quality of sleep, when improving insomnia, It's time to improve your concentration.

First, the USB terminal of the main body 2 of the light irradiation device 1 is electrically connected to a PC or a USB charger with a Micro-USB cable 20 . Next, as shown in FIGS. 1 and 2, the nose pads 30 are sandwiched between the left and right sides of the nose N of the user P, and the other ends of the left and right temples 33 and 34 are attached to the left and right ears Y of the user P. Then, the light irradiation device 1 is detachably attached to the face F of the user P.

Then, when the power switch 21 is turned on, the light emitting surface 42 of the LED 41 of the irradiation unit 4 emits light, and as shown in the image diagram of FIG. be irradiated. The irradiation light L passes through the cornea 51 , pupil 52 and vitreous body 53 of the eyeball 5 and is irradiated onto the retina 54 . Then, endogenous photosensitive retinal ganglion cells (ipRGCs) in the retina 54 react and suppress melatonin. Suppression of melatonin can reset the circadian rhythm and shift its phase. The irradiation time of the irradiation light L is arbitrary, but is preferably about 30 minutes to about 60 minutes. When the power switch 21 is turned off, the light emitting surface 42 of the LED 41 is extinguished and the irradiation of the irradiation light L is stopped.

When the size of the mounting portion 3 of the light irradiation device 1 is exchanged (developed in size) in accordance with the size of the face F of the user P (head width dimension of the user P), first, the first mounting portion 6 is Remove the first mounting screw 60 from the first mounting nut 61 . Next, the integral structural parts (hinge + temples) of the left and right hinges 31 and 32 and the left and right temples 33 and 34 are removed from the main body 2 . Then, an integral structural part (hinges + temples) consisting of left and right hinges 31 and 32 and left and right temples 33 and 34 having a size matching the size of the face F of the user P is attached to the main body 2 by the first mounting portion 6. Install. This completes the size exchange (size expansion) of the mounting portion 3 of the light irradiation device 1 .

The hinge and temple integral structure parts used in the light irradiation device 1 according to this embodiment consist of three sizes of integral structure parts (hinge + temple). That is, an integral structure part of the left and right hinges 31S and 32S of S size and the left and right temples 33 and 34 of the same size, and the left and right hinges 31M and 32M of M size and the left and right temples 33 and 34 of the same size. It consists of an integral structure part, L size left and right hinges 31L, 32L and the same size left and right temples 33, 34 as an integral structure part.

(Description of effects of the embodiment)
The light irradiating device 1 according to this embodiment has the configuration and function as described above, and the effects thereof will be described below.

The light irradiation device 1 according to this embodiment includes a main body portion 2, a mounting portion 3, and an irradiation portion 4. The illuminance of the irradiation light L emitted from the irradiation portion 4 on the surface of the cornea 51 of the user P is up to about 12000 lx (preferably from about 9000 lx to about 11000 lx). As a result, the light irradiation device 1 according to this embodiment can irradiate (deliver) the high intensity irradiation light L to the retina 54 of the user P, so that melatonin is secreted when waking up or wanting to wake up. can be efficiently suppressed. Thereby, the light irradiation device 1 according to this embodiment can efficiently perform the light health maintenance method. The effect of suppressing melatonin secretion will be described in detail in the following "Clinical Evaluation Test on Melatonin Suppression".

The light irradiation device 1 according to this embodiment sets the illuminance of the irradiation light L on the surface of the cornea 51 of the user P to a maximum of about 12000 lx (preferably from about 9000 lx to about 11000 lx). As a result, the light irradiation device 1 according to this embodiment defines the illuminance as a certain value, for example, about 10000 lx, as a product specification, and the light wavelength, the irradiation angle θ1, and the irradiation distance T1 are included based on this illuminance value. In the case of manufacturing a product that can obtain the effect of suppressing the secretion of melatonin by making adjustments such as the above, even if there is a manufacturing tolerance (variation) in the LED 41 as the light source of the irradiation unit 4, the above illuminance is up to about 12000 lx. can be within the range of As a result, the light irradiation device 1 according to this embodiment can efficiently perform the light health maintenance method even if there are manufacturing tolerances (variations) in the product.

The light irradiation device 1 according to this embodiment includes a main body portion 2, a mounting portion 3, and an irradiation portion 4. The range is 50% (preferably about 10%) or less. As a result, the light irradiation device 1 according to this embodiment can suppress the secretion of melatonin due to blue light, and can protect the eyes E of the user P from the blue light. Thereby, the light irradiation device 1 according to this embodiment can efficiently perform the light health maintenance method, and can ensure the safety of the eye E of the user P.

The light irradiation device 1 according to this embodiment makes the blue component of the irradiation light L a blue component with a wavelength in the range of approximately 355 nm to approximately 490 nm. As a result, the light irradiation device 1 according to this embodiment can more efficiently suppress the secretion of melatonin due to blue light, and can more reliably protect the eyes E of the user P from the blue light. . As a result, the light irradiation device 1 according to this embodiment can more efficiently perform the light health maintenance method and more reliably ensure the safety of the eye E of the user P.

In the light irradiation device 1 according to this embodiment, the irradiation unit 4 is provided with an optical filter that makes the blue component of the irradiation light L in the range of about 50% (preferably about 10%) or less. As a result, the light irradiation device 1 according to this embodiment can more efficiently suppress the secretion of melatonin due to blue light, and can more reliably protect the eyes E of the user P from the blue light. . As a result, the light irradiation device 1 according to this embodiment can more efficiently perform the light health maintenance method and more reliably ensure the safety of the eye E of the user P.

The light irradiation device 1 according to this embodiment includes a main body portion 2, a mounting portion 3, and an irradiation portion 4, and high illuminance irradiation light is irradiated from the irradiation portion 4 on the surface of the cornea 51 of the user P. The irradiation angle θ1 in the vertical cross section formed by the central axis Z of L and the optical axis 55 of the eyeball 5 is set within the range of about 0° to about 35°. As a result, the light irradiation device 1 according to this embodiment can be used even if there are individual differences in the size and shape of the face F of the user P, the position of the eyes E of the user P, and the like. , illuminating the retina 54 through the cornea 51, the pupil 52, and the vitreous body 53 of the eyeball 5 of the user P, regardless of which direction the user P's line of sight is directed ( delivery). As a result, the light irradiation device 1 according to this embodiment can produce melatonin by the irradiation light L with high illuminance, regardless of the individual difference of the user P or the direction of the user P's line of sight. The secretion can be suppressed, and the light health maintenance method can be efficiently carried out.

In the light irradiation device 1 according to this embodiment, the irradiation angle θ1 of the irradiation light L is ideally about 0°. That is, ideally, the central axis Z of the high-illuminance illumination light L and the optical axis 55 of the eyeball 5 are substantially aligned, and the high-illuminance illumination light L is emitted from directly in front of the eye E of the user P. It is to be done. The light irradiation device 1 according to this embodiment sets the irradiation angle θ1 of the irradiation light L from the ideal range of approximately 0° upward to approximately 35° (preferably approximately 27°), so that the irradiation unit 4 can be positioned within a range of about 35° (preferably about 27°) upward from the ideal of about 0°. As a result, in the light irradiation device 1 according to this embodiment, the user P can secure a field of view in the downward range from the irradiation angle θ1 of about 0°, so that the light irradiation device 1 according to this embodiment You can carry on with your daily activities (brushing teeth, eating, watching TV, reading newspapers, etc.) while using . Thereby, the light irradiation device 1 according to this embodiment is suitable for a wearable type that is detachably attached to the face F of the user P.

In the light irradiation device 1 according to this embodiment, the central axis Z of the high-illuminance irradiation light L emitted from the irradiation unit 4 is the central axis of the LED 41 of the irradiation unit 4 (the center vertical line of the light emitting surface 42). It is possible to efficiently irradiate (deliver) the retina 54 of the user P with the irradiation light L of high illuminance. As a result, the light irradiation device 1 according to this embodiment can more efficiently suppress the secretion of melatonin, and can more efficiently perform the photohealth maintenance method.

The light irradiation device 1 according to this embodiment includes a body portion 2, a mounting portion 3, and an irradiation portion 4. The irradiation distance between the irradiation portion 4 and the surface of the cornea 51 of the user P in the vertical cross section is T1 should be in the range of about 20 mm or less. As a result, the light irradiation device 1 according to this embodiment can be used even if there are individual differences in the size and shape of the face F of the user P, the position of the eyes E of the user P, and the like. , illuminating the retina 54 through the cornea 51, the pupil 52, and the vitreous body 53 of the eyeball 5 of the user P, regardless of which direction the user P's line of sight is directed ( delivery). As a result, the light irradiation device 1 according to this embodiment can produce melatonin by the irradiation light L with high illuminance, regardless of the individual difference of the user P or the direction of the user P's line of sight. The secretion can be suppressed, and the light health maintenance method can be efficiently carried out.

In the light irradiation device 1 according to this embodiment, the irradiation distance T1 of the irradiation light L is ideally about 0 mm. That is, ideally, the cornea 51 of the user P is directly irradiated with the irradiation light L of high illuminance. In the light irradiation device 1 according to this embodiment, the irradiation distance T1 of the irradiation light L is set within a range from the ideal range of about 0 mm to about 35 mm (preferably about 20 mm), so that the irradiation unit 4 is adjusted to the ideal range of about 0 mm. to about 35 mm (preferably about 20 mm) or less. As a result, the light irradiation device 1 according to this embodiment is suitable for a wearable type that is detachably attached to the face F of the user P.

In the light irradiation device 1 according to this embodiment, the irradiation distance T1 is the distance between the light emitting surface 42 of the LED 41 of the irradiation unit 4 and the surface of the cornea 51 of the irradiation unit 4, so that high illuminance irradiation The light L can be efficiently irradiated (delivered) to the retina 54 of the user P. As a result, the light irradiation device 1 according to this embodiment can more efficiently suppress the secretion of melatonin, and can more efficiently perform the photohealth maintenance method.

A light irradiation device 1 according to this embodiment includes a body portion 2, an attachment portion 3, and an irradiation portion 4. The attachment portion 3 includes a nose pad 30, and left and right hinges configured in three sizes. 31 (31S, 31M, 31L), 32 (32S, 32M, 32L) and left and right temples 33, 34. As a result, the light irradiation device 1 according to this embodiment can select a size that matches the size of the face F of the user P from among the three sizes. As a result, the light irradiation device 1 according to this embodiment can be used even if there are individual differences in the size and shape of the face F of the user P, the position of the eyes E of the user P, and the like. It can be worn on the face F of the person P.

In the light irradiation device 1 according to this embodiment, the main body portion 2 , the nose pad 30 of the mounting portion 3, the left and right temples 33 and 34 of the mounting portion 3, and the irradiation portion 4 can be made of parts of the same size. As a result, the manufacturing cost of the light irradiation device 1 according to this embodiment can be reduced.

The light irradiation device 1 according to this embodiment includes three sizes of left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L), and left and right temples 33 and 34 of the same size. By integrally mounting, the left and right hinges 31 and 32 and the left and right temples 33 and 34 can be easily mounted to the main body 2 .

The light irradiation device 1 according to this embodiment includes three sizes of left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L), and left and right temples 33 and 34 of the same size. By integrally mounting, the left and right hinges 31, 32 and the left and right temples 33, 34 can be made into three sizes. As a result, the light irradiation device 1 according to this embodiment has the left and right temples 33 and 34 of the same size to be hung on the ears Y of the user P, and the left and right hinges 31 (31S, 31M, 31L) of three sizes. Three sizes of left and right temples are available via 32 (32S, 32M, 32L). As a result, the light irradiation device 1 according to this embodiment can be worn according to the face F of the user P even if the user P has individual differences. Here, the irradiation angle θ1 of the irradiation light L is set in a range from ideally about 0° to about 35° (preferably about 27°) upward, and the irradiation unit 4 is set upward from about ideal 0° to about In order to be positioned within the range of 35° (preferably about 27°), the irradiation distance T1 of the irradiation light L should be in the ideal range of about 0 mm to about 35 mm (preferably about 20 mm) or less, In order to position the irradiation unit 4 within the ideal range of about 0 mm to about 35 mm (preferably about 20 mm), the size of the face F of the user P is adjusted as in the light irradiation device 1 according to this embodiment. It is necessary to wear it properly.

The light irradiation device 1 according to this embodiment has three sizes of left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) by forming the nose pad 30 into parts of a plurality of sizes. At the same time, it can be worn according to the face F of the user P who has many individual differences.

As shown in FIG. 13, the light irradiation device 1 according to this embodiment has three sizes of left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) attached to the main body 2. the first mounting surfaces 23, 310 on which the main body 2 and the left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes abut each other when mounted by the portion 6; 320 and the line segment L2 connecting the first mounting portions 6 of the left and right hinges 31 and 32, there are at least two different mounting angles θ2 for the three sizes of the left and right hinges 31 and 32. consists of corners.

That is, in the light irradiation device 1 according to this embodiment, the mounting angle θ2 of the left and right hinges 31S and 32S of the S size and the mounting angle θ2 of the left and right hinges 31M and 32M of the M size are about 5°. The mounting angle θ2 of the left and right hinges 31L and 32L is about 8°, which is different. As a result, the light irradiation device 1 according to this embodiment has two different mounting angles θ2 in the left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes, which allows many people to It can be worn according to the face F of the user P who has a difference.

As shown in FIG. 14, the light irradiation device 1 according to this embodiment has three sizes of left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) attached to the main body 2. the first mounting surfaces 23, 310 on which the main body 2 and the left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes abut each other when mounted by the portion 6; 320 and left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L) of three sizes with the left and right temples 33, 34 attached by the second attachment part 7, three sizes of The mounting distance T2 between the left and right hinges 31, 32 and the second mounting surfaces 314, 324, 330, 340 on which the left and right hinges 33, 34 contact each other is set for each of the three sizes of the left and right hinges 31, 32. different.

That is, in the light irradiation device 1 according to this embodiment, the mounting distance T2 between the S size left and right hinges 31S and 32S is 8.6 mm, and the mounting distance T2 between the M size left and right hinges 31M and 32M is approximately 17 mm, and the attachment distance T2 of the left and right hinges 31L and 32L of the L size is about 23.4 mm, which is different. As a result, the light irradiation device 1 according to this embodiment can be used by many individuals due to the three different mounting distances T2 in the three sizes of left and right hinges 31 (31S, 31M, 31L) and 32 (32S, 32M, 32L). It can be worn according to the face F of the user P who has a difference.

In the light irradiation device 1 according to this embodiment, the irradiation section 4 is composed of an LED 41 that irradiates simulated natural light. As a result, the light irradiation device 1 according to this embodiment irradiates the eye E of the user P with the simulated natural light, that is, the irradiation light L with high illuminance having a spectral distribution very close to that of sunlight from the irradiation unit 4. be able to. Thereby, the light irradiation device 1 according to this embodiment can more efficiently suppress the secretion of melatonin, and can more efficiently perform the photohealth maintenance method.

Since the light irradiation device 1 according to this embodiment has a hollow structure for the main body 2, it is possible to reduce the weight and is suitable for a wearable type that is detachably attached to the face F of the user P. there is

(Description of clinical evaluation study on melatonin suppression)
The contents (A) of the clinical evaluation test and the results (B) of the clinical evaluation test of the clinical evaluation test on melatonin suppression will be described below with reference to FIGS. 15 to 20. FIG.

(Description of clinical evaluation test content (A))
The contents of the clinical evaluation test (A) are as follows.
- Subjects: 12 people in total.
- Clinical evaluation test period: May 2019 (6 people) December 2019 (6 people).
- Test protocol: Low illumination conditions (no light irradiation in an environment of about 10 [lx]).
Direct irradiation method (with light irradiation on the tester of the light irradiation device according to this invention
).
・Test conditions: Measure melatonin levels at night in a low-illumination environment.
Exam time is 5 hours.
Light irradiation is not performed under low illumination conditions.
Direct irradiation test was conducted one week after the test under low illumination conditions.
Light irradiation by the direct irradiation method is performed for the last hour.
In addition, during the test period, the subjects are subject to lifestyle control.

(Description of clinical evaluation test results (B))
Clinical evaluation test results (B) are as follows.
FIG. 15 shows the transition of the average melatonin amount under the low illumination condition and the direct irradiation method. The time axis of the horizontal axis in FIG. 15 expresses the transition of the amount of melatonin as data during no light irradiation from -4:00 to 0:00 and during light irradiation from 0:00 to 1:00. Under the low illumination condition in FIG. 15, the amount of melatonin increases over time. On the other hand, in the direct irradiation method in FIG. 15, it can be seen that the amount of melatonin decreases after the start of light irradiation at 0:00. As shown in FIG. 15, the direct irradiation method has an effect of suppressing melatonin secretion by about 32% compared to the low illumination condition. In addition, in "no light irradiation from -4 o'clock to 0 o'clock" in FIG. It is. In other words, it is because of the human clinical experiment, and the value varies depending on the human condition on that day. In addition, since the day of the experiment under the low illumination condition and the day of the experiment under the direct irradiation method are different, there is a difference in the "absolute melatonin amount".

Here, both of the following two conditions (I) and (II) must be satisfied in order to determine that "the melatonin inhibitory effect is present".
(I) Is melatonin sufficiently suppressed compared to low illumination conditions?
(II) Is melatonin sufficiently suppressed compared to the amount of melatonin at 0 o'clock (immediately before irradiation) in each condition?
When there is a statistically significant difference in both of the above two points, it is determined that there is a "melatonin inhibitory effect." The results of statistical analysis are shown in the table of FIG.

How to read the table in FIG. 16 will be described. In this clinical evaluation test, a statistical analysis called t-test is performed. When performing statistical analysis, t-value and p-value are calculated to determine whether or not there is a significant difference in the data obtained in the experiment. In the t-test, after calculating the t-value (also called the test statistic) calculated from the data, the probability p-value that the t-value is likely to occur is calculated. If the calculated p-value is smaller than a predetermined superiority level, it is judged that there is a significant difference in the data (explanation of the calculation formula is omitted). From the table of FIG. 16, both conditions (I) and (II) were "significantly different" in the direct irradiation method. Therefore, it can be said that the direct irradiation method has an effect of suppressing melatonin.

The result of the clinical evaluation test on melatonin suppression proves the melatonin secretion suppressing effect of the light irradiation device 1 according to this embodiment.

(Explanation of test machine)
Details of specifications of the direct irradiation type testing machine (testing machine of the light irradiation device according to the present invention) in which the clinical evaluation test for melatonin suppression was performed are shown in the table of FIG. 17 . Note that the numerical values in the table of FIG. 17 are actually measured values. Here, since it is thought that the irradiation angle and irradiation distance when the tester is attached will vary depending on the test subject, as shown in FIGS. , and the reference irradiation distance T1 is set to a range of about 35 mm or less.

FIG. 18 shows an irradiation angle θ1 in the vertical section formed by the central axis Z of the irradiation light L emitted from the irradiation section 4 and the optical axis 55 of the eyeball 5, and the angle between the irradiation section 4 and the surface of the cornea 51 in the vertical section. FIG. 11 is an explanatory diagram (an image diagram of an irradiation unit) showing an irradiation distance T1 between. FIG. 18 is an explanatory diagram reproducing the specifications of the table in FIG. FIG. 19 is an explanatory diagram (image diagram) showing a state in which the irradiation light L emitted from the irradiation unit 4 enters (enters) the eyeball 5. As shown in FIG.

FIG. 20 shows the spectral spectrum when the illuminance on the eyeball 5 was measured by the tester. In addition, when the wavelength from about 355 nm to about 490 nm is the blue component, the ratio of the blue component in the spectral spectrum shown in FIG. 20 is 9.04[%]. The measurement environment of the spectrum shown in FIG. 20 is as follows. The measurement date and time is May 20, 2019 (Monday), and the location is the hardware area on the second floor of the head office of Densei Co., Ltd., the patent applicant.

(Description of examples other than the embodiment)
In addition, the light irradiation apparatus of this invention is not limited to the said embodiment.

1 Light irradiation device 2 Main unit 2D Lower part 2U Upper part 20 Micro-USB cable 21 Power switch 22 Shade 23 First mounting surface 24 First insertion recess 25 First mounting hole 3 Mounting part 30 Nose pad 31 Left hinge (endpiece)
31L L size left hinge (armor)
31M M size left hinge (armor)
31S S size left hinge (armor)
310 First mounting surface 311 First insertion protrusion 312 First mounting hole 313 First mounting nut fitting recess 314 Second mounting surface 315 Second insertion recess 316 Second mounting hole 32 Right hinge (endpiece)
32L L size right hinge (armor)
32M M size right hinge (armor)
32S S size right hinge (armor)
320 First mounting surface 321 First insertion protrusion 322 First mounting hole 323 First mounting nut fitting recess 324 Second mounting surface 325 Second insertion recess 326 Second mounting hole 33 Left temple 330 Second mounting surface 331 Second mounting surface 2 insertion protrusion 332 second mounting hole 34 right temple 340 second mounting surface 341 second insertion protrusion 342 second mounting hole 4 irradiation section 40 substrate 41 LED
42 Surface 5 Eyeball 50 Eyelid
51 cornea 52 pupil 53 vitreous body 54 retina 55 optical axis (optical axis of eyeball 5, eye axis)
6 first mounting portion 60 first mounting screw 61 first mounting nut 62 washer 7 second mounting portion 70 second mounting screw 71 second mounting nut E eye (human eye)
F Face L Irradiation light (light)
L1 Extension line L2 Line segment N Nose P User T1 Irradiation distance T2 Mounting distance Y Ear Z Center axis of irradiation light L (optical axis)
θ1 Illumination angle θ2 Mounting angle

FIG. 1 is a usage state diagram showing an embodiment of a light irradiation device according to the present invention. FIG. 2 is a usage state diagram showing a state in which the blindfold shade is attached and used. FIG. 3 is a perspective view showing a state in which the light irradiation device is viewed obliquely from above. FIG. 4 is a perspective view showing an exploded state of the light irradiation device as viewed obliquely from above. FIG. 5 is a perspective view showing a disassembled state of the light irradiating device, viewed obliquely from below. FIG. 6 is a perspective view (a perspective view seen from a different angle from FIG. 5) showing a state of size exchange (size development) of the light irradiation device as seen from obliquely below. FIG. 7 is a plan view showing a state in which hinges of three sizes are attached to the light irradiation device. (A) is a plan view showing a state in which an S size hinge is attached to the light irradiation device. (B) is a plan view showing a state in which an M size hinge is attached to the light irradiation device. (C) is a plan view showing a state in which the L size hinge is attached to the light irradiation device. FIG. 8 is a bottom view showing a state in which hinges of 3 sizes are attached to the light irradiation device. (A) is a bottom view showing a state in which an S size hinge is attached to the light irradiation device. (B) is a bottom view showing a state in which an M size hinge is attached to the light irradiation device. (C) is a bottom view showing a state in which the L size hinge is attached to the light irradiation device. FIG. 9 is an explanatory bottom view showing the difference in the position (arrangement) of temples when hinges of three sizes are attached to the light irradiation device. FIG. 10 is a bottom view showing a state in which hinges of three sizes are attached to temples. (A) is a bottom view showing a state in which an S size hinge is attached to a temple. (B) is a bottom view showing a state in which an M size hinge is attached to a temple. (C) is a bottom view showing a state in which an L size hinge is attached to a temple. FIG. 11 is a perspective view showing a state in which hinges of three sizes are attached to temples. (A) is a perspective view showing a state in which an S size hinge is attached to a temple. (B) is a perspective view showing a state in which an M size hinge is attached to a temple. (C) is a perspective view showing a state in which an L-sized hinge is attached to a temple. FIG. 12 is a vertical cross-sectional view (cross-sectional view taken along the line XII-XII in FIG. 9) showing how the main body, hinges, and temples of the light irradiation device are attached. FIG. 13 is an explanatory bottom view showing the mounting angle between the first mounting surface and the reference line. FIG. 14 is an explanatory bottom view showing the mounting distance between the first mounting surface and the second mounting surface. FIG. 15 is an explanatory diagram showing changes in the amount of melatonin in clinical evaluation test results on melatonin suppression. The vertical axis is the amount of melatonin "pg/ml". The horizontal axis is time "h". FIG. 16 is an explanatory diagram showing the detailed specifications of the direct irradiation tester (the light irradiation device of the present invention) on which a clinical evaluation test on melatonin suppression was conducted . FIG. 17 is an explanatory diagram showing the irradiation angle in the vertical section formed by the central axis of the irradiation light emitted from the irradiation section and the optical axis of the eyeball, and the irradiation distance between the irradiation section and the surface of the cornea in the vertical section. (Image diagram of an irradiation unit) . FIG. 18 is an explanatory diagram (image diagram) showing a state in which the irradiation light emitted from the irradiation unit enters (enters) the eyeball . FIG. 19 is an explanatory diagram showing the spectral spectrum on the surface of the cornea of the direct irradiation system tester (the light irradiation device of the present invention) in which a clinical evaluation test on melatonin suppression was conducted. The vertical axis is the spectral irradiance "W/m ² /nm". The horizontal axis is the wavelength "nm" .

Here, both of the following two conditions (I) and (II) must be satisfied in order to determine that "the melatonin inhibitory effect is present".
(I) Is melatonin sufficiently suppressed compared to low illumination conditions?
(II) Is melatonin sufficiently suppressed compared to the amount of melatonin at 0 o'clock (immediately before irradiation) in each condition?
When there is a statistically significant difference in both of the above two points, it is determined that there is a "melatonin inhibitory effect" .

In both conditions (I) and (II), the direct irradiation method resulted in "significant difference". Therefore, it can be said that the direct irradiation method has an effect of suppressing melatonin.

(Explanation of test machine)
Details of specifications of the direct irradiation type testing machine (testing machine of the light irradiation device according to the present invention) in which the clinical evaluation test for melatonin suppression was performed are shown in the table of FIG. 16 . Note that the numerical values in the table of FIG. 16 are actually measured values. Here, since it is thought that the irradiation angle and irradiation distance when the tester is attached will vary depending on the test subject, as shown in FIGS . , and the reference irradiation distance T1 is set to a range of about 35 mm or less.

FIG. 17 shows an irradiation angle θ1 in the vertical section formed by the central axis Z of the irradiation light L emitted from the irradiation section 4 and the optical axis 55 of the eyeball 5, and the angle between the irradiation section 4 and the surface of the cornea 51 in the vertical section. FIG. 11 is an explanatory diagram (an image diagram of an irradiation unit) showing an irradiation distance T1 between. FIG. 17 is an explanatory diagram reproducing the specifications of the table in FIG. Note that FIG. 18 is an explanatory diagram (image diagram) showing a state in which the irradiation light L emitted from the irradiation unit 4 enters (enters) the eyeball 5 .

FIG. 19 shows the spectral spectrum when the illuminance on the eyeball 5 was measured by the tester. In addition, when the wavelength from about 355 nm to about 490 nm is the blue component, the ratio of the blue component in the spectral spectrum shown in FIG. 19 is 9.04[%]. The measurement environment of the spectrum shown in FIG. 19 is as follows. The measurement date and time is May 20, 2019 (Monday), and the location is the hard area on the second floor of the head office of Densei Co., Ltd., the patent applicant.

Claims (12)

a main body;
a mounting portion attached to the main body portion for mounting the main body portion on a user's face;
an irradiating section provided in the body section for irradiating the cornea of the user wearing the body section with light through the mounting section;
with
The illuminance of the irradiation light emitted from the irradiation unit on the surface of the cornea is in the range of up to about 12000 lx.
A light irradiation device characterized by: a main body;
a mounting portion attached to the main body portion for mounting the main body portion on a user's face;
an irradiating section provided in the body section for irradiating the cornea of the user wearing the body section with light through the mounting section;
with
The ratio of the blue component of the irradiation light emitted from the irradiation unit is in the range of about 50% or less.
A light irradiation device characterized by: wherein the blue component of the illuminating light is a blue component with a wavelength ranging from about 355 nm to about 490 nm;
3. The light irradiation device according to claim 2, characterized in that: The irradiation unit has an optical filter in which the blue component of the irradiation light is in the range of about 50% or less,
4. The light irradiation device according to claim 2 or 3, characterized in that: a main body;
a mounting portion attached to the main body portion for mounting the main body portion on a user's face;
an irradiating section provided in the body section for irradiating the cornea of the user wearing the body section with light through the mounting section;
with
The irradiation angle in the vertical cross section formed by the central axis of the irradiation light emitted from the irradiation unit on the surface of the cornea and the optical axis of the eyeball is in the range of about 0° to about 35°.
A light irradiation device characterized by: The irradiation unit is composed of an LED,
A central axis of the irradiation light emitted from the irradiation unit is a central axis of the LED,
6. The light irradiation device according to claim 5, characterized in that: a main body;
a mounting portion attached to the main body portion for mounting the main body portion on a user's face;
an irradiating section provided in the body section for irradiating the cornea of the user wearing the body section with light through the mounting section;
with
The irradiation distance between the irradiation unit and the surface of the cornea in a vertical cross section is in the range of about 35 mm or less.
A light irradiation device characterized by: The irradiation unit is composed of an LED having a light emitting surface,
The irradiation distance is the distance between the light emitting surface of the LED and the surface of the cornea.
8. The light irradiation device according to claim 7, characterized in that: The mounting part is
a nose pad attached to the central portion of the main body;
left and right hinges each having one end attached to both ends of the main body;
Left and right temples each having one end rotatably attached to the other end of the left and right hinges;
has
The nose pad is composed of parts of the same size or parts of a plurality of sizes according to the size of the user's face,
The body portion, the irradiation portion, and the left and right temples are composed of parts of the same size,
The left and right hinges are composed of parts of a plurality of sizes according to the size of the user's face,
The light irradiation device according to any one of claims 5 to 8, characterized in that: an extension line of a first mounting surface where the main body and the left and right hinges of a plurality of sizes abut each other when the left and right hinges of a plurality of sizes are mounted on the main body by a first mounting portion; The mounting angle sandwiched by the line segment connecting the first mounting portions of the left and right hinges is composed of at least two different angles in a plurality of sizes of the left and right hinges,
10. The light irradiation device according to claim 9, characterized in that: a first mounting surface on which the main body and the left and right hinges of a plurality of sizes abut each other when the left and right hinges of a plurality of sizes are mounted to the main body by a first mounting portion;
Between a second mounting surface where the left and right hinges of a plurality of sizes and the left and right temples contact each other when the left and right hinges are attached to the left and right hinges of a plurality of sizes by a second mounting portion. The mounting distance of
different for each of the plurality of sizes of the left and right hinges;
10. The light irradiation device according to claim 9, characterized in that: The irradiation unit is composed of an LED that emits simulated natural light,
The light irradiation device according to any one of claims 1 to 11, characterized in that:

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