JP5138400B2 - Lighting device - Google Patents

Description

  The present invention relates to an illuminating device that reduces the melatonin secretion inhibitory effect of illumination light.

  Conventionally, it is known that the color of illumination light affects a human biological rhythm. For example, if the light color of the illumination light is reddish like a light bulb before going to bed, the stimulation to the brain will be reduced compared to white light or daylight color light, and it will promote a smooth sleep of people. Can do. On the other hand, if the light color of the illumination light is a pale color such as a mercury lamp, the stimulation to the brain is strengthened and the human consciousness can be awakened. It is thought that melatonin secreted from the pineal gland of the brain is deeply involved in the effects of these light colors on human sleep.

  Melatonin has individual differences due to differences in life rhythm, etc., but generally it is secreted in a large amount from before sleep to early sleep, and it is thought that it promotes a decrease in body temperature and smooth sleep. In addition, it is known that the secretion of melatonin is more strongly suppressed when receiving light having a wavelength of around 464 nm. Therefore, it is possible to reduce the suppression of melatonin secretion by cutting a wavelength component around 464 nm from the illumination light so that a person can fall asleep smoothly at bedtime.

However, the light whose wavelength component near 464 nm is cut loses the blue wavelength component, and thus becomes an unnatural light color as illumination light. Therefore, by providing an optical filter that restricts the average light transmittance at a wavelength of 480 to 505 nm, which has a relatively high melatonin secretion suppressing effect and a low contribution to light color, to approximately 30% or less, while preventing melatonin secretion suppression. An illumination device that can keep illumination light in a relatively natural color is known (for example, see Patent Document 1).
JP 2006-259079 A

  However, in the illuminating device disclosed in Patent Document 1, the entire illumination surface is covered with a filter that restricts the transmission of the blue wavelength component, so that the color of the illumination light appears different from the natural color (yellowish color) The entire room in which the lighting device is installed is illuminated with such a light color, which is not suitable for humans to perform visual work such as reading under the lighting device.

  Therefore, the present invention solves the above-mentioned problem, and when performing visual work under illumination light, the visual object looks natural and does not impair human operability, and the visual work is performed. An object of the present invention is to provide a lighting device that allows a person who does not have light of a wavelength that suppresses secretion of melatonin to reach a person who can sleep smoothly.

In order to achieve the above object, an invention according to claim 1 is an illuminating device comprising: a light source; and a housing that irradiates light from the light source and has an irradiation surface formed to face a floor surface. there, the irradiated surface, provided with a louver normal direction is from the radiation-shaped flaps generally parallel with the floor surface, the flap, of the light from the light source, the secretion of melatonin to humans Ri filter der to reduce the transmission of light of a wavelength component having an effect of inhibiting, to rotate around the support shaft extending horizontally through the flap itself, the normal direction is substantially perpendicular to the floor as can be changed to, and, when the normal direction of all of the flaps to be substantially perpendicular to the floor, substantially the entire surface of the irradiation surface, the Rukoto covered by a series of plane formed by the flap Features.

According to the first aspect of the present invention, the light irradiation surface is provided with a louver made of a radial flap, and the flap is configured as a filter that reduces light transmission that suppresses secretion of melatonin. In this case, the light from the light source is directly irradiated and the workability of human visual work is not impaired. In addition, in the direction deviating from the direction directly below the irradiated surface (the direction in which light directly enters the eye), light with a reduced wavelength component having an action of suppressing secretion of melatonin by the radial flap is irradiated. On the other hand, it does not suppress the secretion of melatonin and does not disturb the smooth sleep of a person.

(First embodiment)
Hereinafter, an illumination device according to a first embodiment of the present invention will be described with reference to FIGS. 1 and 2. The illuminating device 1 of this embodiment is provided with the light source 2 and the housing | casing 4 which has the irradiation surface 3 formed so that the light from the light source 2 may be irradiated, and the floor surface F may be faced. Moreover, the illuminating device 1 is provided with the louver 6 (refer FIG. 2) which consists of the cyclic | annular flap 5 in the irradiation surface 3, and the flap 5 is an effect | action which suppresses the secretion of melatonin with respect to a human body among the lights from the light source 2. The filter is configured to reduce the transmission of light of a wavelength component having The structure of the louver 6 will be described in detail later. The lighting device 1 is normally applied to an embedded lighting fixture that is embedded in a ceiling C and irradiates light in the direction of the floor surface F. In addition, the solid line arrow in a figure shows the direct light L1 radiate | emitted from the light source 2, and a dotted line arrow and a dashed-dotted line arrow show the light L2 which permeate | transmitted the flap 5. FIG.

  A general-purpose light source is used as the light source 2, and for example, an annular fluorescent lamp, a bulb-type fluorescent lamp, a halogen lamp, an incandescent lamp, an LED, or the like is used. In addition, the light source 2 may be configured such that a plurality of LEDs having different emission colors are arranged and light of any color can be emitted by appropriately controlling the dimming of each LED.

  The housing 4 is made of a substantially cylindrical structural material, and is formed so that the surface in contact with the ceiling C surface of the housing 4 becomes the irradiation surface 3. As the material of the housing 4, for example, a metal such as an aluminum alloy or a resin material such as polycarbonate or PPS is used. The shape and dimensions of the housing 4 are not particularly limited, but are preferably designed to have an embedding hole size and device embedding height comparable to those of a general-purpose embedded lighting fixture.

  As shown in FIG. 2, the louver 6 includes eight annular flaps 5 having different diameters arranged concentrically, and each annular flap 5 has a normal direction (arrow r1) of the flap surface 5a in the floor surface F. And is fixed to the irradiation surface 3 of the housing 4 so as to be substantially parallel to each other. The annular flaps 5 are connected to each other by stays 7 that radially penetrate the flap surface 5 a, and the outer ends of the stays 7 are fixed to the housing 4.

  Each annular flap 5 is made of a translucent resin containing, for example, an orange fluorescent coloring material, and the width w in the vertical direction (see FIG. 1) is such that the lower end of the flap 5 slightly protrudes from the ceiling C surface, The louver 6 is designed to be as large as possible within a range where the entire louver 6 is housed in the housing 4. The reason why the width w of the annular flap 5 is designed to be large will be described later.

  If the lower end of the flap 5 protrudes downward from the ceiling C surface, the color of the flap 5 itself is conspicuous and the color balance of the ceiling C may be lost. However, by reducing the protrusion amount as much as possible, The trouble can be avoided. For the same reason, it is also effective to apply a color that matches the ceiling C surface to the lower end of the annular flap 5.

  The annular flap 5 is configured to reduce transmission of a wavelength component having an action of suppressing the secretion of melatonin to the human body, preferably a wavelength component in the vicinity of a wavelength of 460 nm, of the light emitted from the light source 2. ing.

  Further, the translucent resin that is a main constituent material of the annular flap 5 is not particularly limited as long as it is a translucent resin, and a known material is appropriately used. Examples thereof include acrylic resins, polystyrene resins, vinyl chloride resins, polylactic acid resins, silicon resins, unsaturated polyester resins, and the like, and these may be used alone or in combination of two or more. Preferably, an acrylic resin that is excellent in translucency and weather resistance and applicable to a wide range of uses is used.

  Hereinafter, the effect | action of the illuminating device 1 of this embodiment is demonstrated with reference to FIG. As described above, the irradiation surface 3 of the illumination device 1 is provided with the louver 6 including the annular flap 5 in which the normal direction r1 is parallel to the floor surface F, and the flap 5 secretes melatonin to the human body. Since the filter is configured to be a filter that reduces light having a wavelength component that has an effect of suppressing the light, the light directed directly downward from the light source 2 does not pass through the annular flap 5 but becomes direct light L1, and in a direction inclined by a predetermined angle. The light that goes is the light L2 that has passed through the annular flap 5. For convenience of explanation later, light L2 having a relatively small inclination angle θ is indicated by a dotted arrow, and light L2 having a relatively large inclination angle θ is indicated by a one-dot chain arrow.

  Since the direct light L1 does not pass through the annular flap 5 (filter), the color rendering of the light from the light source 2 (for example, white light) is maintained as it is. Therefore, for example, when the user P1 performs a visual work such as placing the table T below the irradiation surface 30 and reading the book B on the table T, the workability of the user P1 is not deteriorated. Will not be damaged. The direct light L1 includes light of a wavelength component that suppresses the secretion of melatonin and prevents a person from falling asleep smoothly. There is no direct incidence on the eyes of the user P2 whose direction is horizontal or slightly downward.

  On the other hand, a part of the light L2 transmitted through the annular flap 5 travels in a direction inclined at a predetermined angle θ from the vertical, so that it directly enters the eyes of the user P2 who is not performing visual work. Since the light of the wavelength component that suppresses secretion is reduced, there is little stimulation given to the user P2, and the smooth sleep of the user P2 is not hindered. Of the light emitted from the light source 2, the light L <b> 2 having a large inclination angle θ from the vertical (a dashed-dotted arrow) is likely to be directly incident on the eyes of the user P <b> 2. The light having a wavelength component that is transmitted a plurality of times and suppresses the secretion of melatonin is greatly reduced, and the stimulation given to the user P2 is small. For the reasons described above, the larger width w of the annular flap 5 is advantageous because it can give a larger number of transmissions to the light emitted at the same inclination angle θ.

(Second Embodiment)
Next, an illumination device according to a second embodiment of the present invention will be described with reference to FIGS. The illumination device 1 of the present embodiment is different from the first embodiment only in the configuration of the louver 6 and the other configurations are the same. FIG. 3 is a perspective view of the louver 26 in the present embodiment.

  The louver 26 of the present embodiment is composed of a large number (12 in this example) of rectangular flaps 25 extending in the radial direction and arranged at equal angular intervals. Each flap 25 is supported on the irradiation surface 3 of the housing 4 such that the normal direction (arrow r2) of the flap surface 25a is substantially parallel to the floor surface F. On the other hand, the filter is configured to reduce transmission of light having a wavelength component having an action of suppressing secretion of melatonin. The translucent resin that is a main constituent material of each flap 25 is not particularly limited as long as it is a translucent resin as in the first embodiment, and a known material is appropriately used.

  As shown in FIG. 4, each flap 25 has a support shaft 21 extending horizontally through the center of the flap surface 25 a, and both ends are supported by the housing 4 via the support shaft 21. Specifically, one end 21 a of the support shaft 21 is supported by the bearing 23 of the center support member 22 fixed at the center position of the housing 4, and the other end 21 b of the support shaft 21 is fixed to the outer periphery of the housing 4. It is supported by a bearing 27 of the annular support member 24. Accordingly, in the lighting device 1 of the present embodiment, each flap 25 is rotatable around the horizontal support shaft 21 (arrow t in FIG. 3), and the user manually operates the direction (method) of each flap surface 25a. The direction of the line r2 can be adjusted arbitrarily.

  Next, the operation of the present embodiment will be described with reference to FIG. The operation of the illumination device 1 of the present embodiment is substantially the same as the operation of the first embodiment, and the light heading from the light source 2 in the downward direction becomes the direct light L1 without passing through the flap 25, and is inclined at a predetermined angle. The light traveling in the direction becomes the light L2 transmitted through the flap 25. Since the direct light L1 does not pass through the flap 25 (filter), the color rendering property of the light of the light source 2 (for example, white light) is maintained as it is, and when the user P performs visual work, the color discrimination property is lowered. Therefore, the workability of the user P is not impaired. Further, the direct light L1 includes light having a wavelength component that suppresses the secretion of melatonin and prevents a person from falling asleep smoothly. However, the direct light L1 is incident directly on the eyes of the user P because the traveling direction is only substantially downward. There is no.

  On the other hand, a part of the light L2 that has passed through the flap 25 travels in a direction inclined at a predetermined angle from the vertical, and thus directly enters the eyes of the user P. However, the light having a wavelength component that suppresses the secretion of melatonin by the flap 25 is emitted. Since it is reduced, there is little irritation | stimulation given to the user P, and the user's P smooth sleep fall is not prevented.

  Further, since the direction of each flap 25 can be adjusted, for example, when the user P finishes the visual operation, the direction of each flap 25 is manually set so that the normal direction r2 thereof is nearly perpendicular to the floor surface F. Of the wavelength component that is adjusted so that the flap surface 25a approaches horizontal, and most of the light emitted from the light source 2 toward the floor surface F passes through the flap 25 and suppresses the secretion of melatonin. Light can be reduced. In this case, even in a position directly below the lighting device 1, illumination is performed with light with less stimulation, and an environment in which the user can shift to sleep more smoothly can be achieved.

(Third embodiment)
Next, a lighting device according to a third embodiment of the present invention will be described with reference to FIGS. The illuminating device 1 of this embodiment also differs from the first embodiment only in the configuration of the louver, and the other configurations are the same. FIG. 5 is an overall perspective view of the louver 36 in the present embodiment.

  The louver 36 of this embodiment is composed of a large number (12 in this example) of elongated trapezoidal flaps 35 that extend in the radial direction and are arranged at equal angular intervals. Similar to the first and second embodiments, each flap 35 is supported on the irradiation surface 3 of the housing 4 so that the normal direction (arrow r3) of the flap surface 35a is substantially parallel to the floor surface F. In the light from the light source 2, the filter is configured to reduce transmission of light having a wavelength component that has an action of suppressing the secretion of melatonin to the human body. The translucent resin that is the main constituent material of each flap 35 is not particularly limited as long as it is a translucent resin as in the first embodiment, and a known material is appropriately used.

  As shown in FIG. 6, each flap 35 has a support shaft 31 that extends horizontally through the center of the flap surface 35 a, and both ends are supported by the housing 4 via the support shaft 31. Specifically, one end 31 a of the support shaft 31 is supported by the bearing 33 of the central support member 32 fixed to the center position of the housing 4, and the other end 31 b of the support shaft 31 is fixed to the outer periphery of the housing 4. It is supported by a bearing 37 of the annular support member 34. Therefore, also in the illuminating device 1 of this embodiment, each flap 35 is rotatable around the horizontal spindle 31 (arrow t of FIG. 5) similarly to 2nd Embodiment.

  The louver 36 of this embodiment is further provided with a drive mechanism 41 that changes the directions of all the flaps 35 in conjunction with each other. Hereinafter, the drive mechanism 41 for adjusting the direction of the flap 35 will be described with reference to FIGS. 6 and 7. The drive mechanism 41 for adjusting the direction of the flap 35 includes a pinion gear 42 fixed to one end 31a of each support shaft 31 of the flap 35 and a ring-shaped rotating member 43 formed with a downward rack 43a that meshes with the pinion gear 42. And a pinion gear 45 fixed to the shaft of the motor 44 that meshes with the rack portion 43 b formed on the upper surface of the rotating member 43, and a control device 46 that controls the rotation of the motor 44. In addition, an operation signal from the remote controller 48 received by the infrared light receiving unit 47 is input to the control device 46.

  When the user operates the remote controller 48 to rotate the motor 44 by a predetermined amount, the rotating member 43 rotates along the direction of arrow a in FIG. 7 and is engaged with the downward rack portion 43a via the pinion gear 42. The support shaft 31 of each flap 35 rotates. As the respective support shafts 31 rotate, the directions of all the flaps 35 change in conjunction with each other (arrow t in FIG. 5).

  Next, the effect | action of this embodiment is demonstrated with reference to FIG.5 and FIG.8 (a), (b). The operation of the illumination device 1 of the present embodiment is also substantially the same as the operation of the first embodiment, and the light directed directly downward from the light source 2 does not pass through the flap 35 and becomes the direct light L1, which is inclined at a predetermined angle. The light traveling in the direction becomes the light L2 transmitted through the flap 35. Since the direct light L1 does not pass through the flap 35, the color rendering property of the light of the light source 2 is maintained as it is, and when the user P performs visual work, the color discrimination is not deteriorated and the workability of the user P is impaired. Absent. Further, the direct light L1 is strong and prevents a person from falling asleep smoothly. However, since the traveling direction is only in a substantially downward direction, the direct light L1 is not directly incident on the eyes of the user P who is not performing visual work.

  Part of the light L2 that has passed through the flap 35 travels in a direction inclined at a predetermined angle from the vertical, so that it directly enters the eyes of the user P. However, the flap 35 reduces the light of the wavelength component that suppresses melatonin secretion. Therefore, there is little irritation | stimulation given to the user P, and the user's P smooth sleep fall is not prevented.

  In addition, unlike the second embodiment, each flap 35 has an elongated trapezoidal shape. Therefore, by operating the remote controller 48 as described above, the orientations of all the flaps 35 are adjusted and the flap surface 35a is adjusted. When the is substantially horizontal, the flap surface 35a forms a series of flat surfaces without overlapping portions, and the irradiation surface 3 can be substantially covered with the flap 35. 8A shows the louver 36 in a state where the normal line r3 of all the flaps 35 is parallel to the floor surface F, and FIG. 8B shows the normal line r3 of all the flaps 35 with the floor surface F. The louver 36 is shown in a vertical state.

  As described above, in the lighting device 1 of the present embodiment, when the user P operates the remote controller 48, all the flaps 35 are in a state in which the direction of the normal line r3 is parallel to the floor surface F. Thus, it is possible to easily switch to a state perpendicular to the floor surface F. In the former state, workability when the user P performs visual work under the lighting device 1 is not impaired, and smooth sleep is not prevented. In the latter state, since there is little light stimulation even in the lower position of the illuminating device 1, it can be set as the environment where a user can shift to sleep more smoothly.

The figure which shows the structure and operation example of the illuminating device which concern on the 1st Embodiment of this invention. The perspective view of the louver in the illumination device. The perspective view of the louver of the illuminating device which concerns on the 2nd Embodiment of this invention. The figure which shows the support structure of the flap in the illumination device. The perspective view of the louver of the illuminating device which concerns on the 3rd Embodiment of this invention. The figure which shows the drive structure for the support structure and direction adjustment of the flap in the illumination device. The perspective view which shows the drive mechanism for the direction adjustment of the flap in the illumination device. (A) is a bottom view of the louver in a state where the normals of all the flaps in the lighting device are parallel to the floor surface, and (b) is a bottom surface of the louver in a state where the normals of all the flaps are perpendicular to the floor surface. Figure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Light source 3 Irradiation surface 4 Case 5 Annular flap (filter)
6 Louver 25 Radial flap (filter)
26 Louver 35 Radial flap (filter)
36 Louver F Floor r1, r2, r3 Normal

Claims (1)

A lighting device comprising: a light source; and a housing having an irradiation surface that is formed so as to face the floor surface while irradiating light from the light source,
Wherein the irradiation surface, comprising the louvers normal direction is from the radiation-shaped flaps generally parallel with the floor,
The flap, of the light from the light source, filter der to reduce the transmission of light of a wavelength component having an action to suppress the secretion of melatonin to humans is, a support shaft extending horizontally through the flap itself Can be rotated so that its normal direction is substantially perpendicular to the floor surface,
And, when the normal direction of all of the flaps to be substantially perpendicular to the floor, substantially the entire surface of the irradiation surface, the illumination device according to claim Rukoto covered by a series of plane formed by the flap.

Images