JP2017107778A - Lighting device and bath room - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which obtains clear light.SOLUTION: A lighting device 10 has: a plate-like member 20 which has light transmissivity and is disposed in an opening provided on a ceiling; a light source part 30 disposed above the ceiling 50 and configured to project light into a room through the plate-like member 20; and a cloudiness preventing part which suppresses cloudiness of the plate-like member 20. The cloudiness preventing part is, for example, a cloudiness preventing coat layer 40 provided at the plate-like part 20.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lighting device used in a bathroom or the like.

  Conventionally, various devices used in a house have been proposed. Patent Document 1 discloses a residential mirror device that can provide a mirror function and an information display function. The residential mirror device is installed in a bathroom, for example.

JP 2003-61797 A

  By the way, when a lighting device is used in a place with high humidity such as a bathroom, clear light may not be obtained due to fogging of the light emitting portion.

  Then, this invention provides the illuminating device from which clear light is obtained, and a bathroom provided with the said illuminating device.

  A lighting device according to one embodiment of the present invention has a light-transmitting property, and has a plate-like member that is disposed in an opening provided in a ceiling, and is disposed above the ceiling and is placed indoors through the plate-like member. A light source unit that projects light onto the plate member, and a fog suppression unit that suppresses fogging of the plate-like member.

  The bathroom which concerns on 1 aspect of this invention is equipped with the said illuminating device and the said ceiling.

  According to the lighting device and the bathroom of the present invention, clear light can be obtained.

1 is an external view of a bathroom according to Embodiment 1. FIG. FIG. 2 is a diagram illustrating a schematic configuration of a lighting device provided in the bathroom according to Embodiment 1. FIG. 3 is a diagram illustrating a specific configuration of the light source unit. FIG. 4 is a diagram illustrating a schematic configuration of the illumination apparatus according to Embodiment 2. FIG. 5 is a diagram illustrating a schematic configuration of the illumination apparatus according to Embodiment 3. FIG. 6 is a diagram illustrating a schematic configuration of a lighting apparatus according to Embodiment 4. FIG. 7 is a diagram for explaining the light scattering characteristics of the plate-like member according to the fourth embodiment.

  Hereinafter, embodiments will be specifically described with reference to the drawings.

  It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a schematic diagram and is not necessarily shown strictly. Moreover, in each figure, the same code | symbol is attached | subjected to the substantially same structure, and the overlapping description may be abbreviate | omitted or simplified.

(Embodiment 1)
[Schematic configuration]
First, a schematic configuration of a lighting device according to Embodiment 1 and a bathroom including the lighting device will be described. 1 is an external view of a bathroom according to Embodiment 1. FIG. FIG. 2 is a diagram illustrating a schematic configuration of a lighting device provided in the bathroom according to Embodiment 1.

  As shown in FIGS. 1 and 2, the bathroom 100 according to the first embodiment includes a lighting device 10 and a ceiling 50. The illumination device 10 includes a light source unit 30 and a plate-like member 20.

  The light source unit 30 projects light into the bathroom 100 via the plate-like member 20 fitted in the opening provided in the ceiling 50. Specifically, the light source unit 30 projects light onto the wall surface of the bathroom 100. An existing inspection port or the like may be used as the opening provided in the ceiling 50.

  Here, the light projected by the light source unit 30 may be used as illumination or may have the irradiation pattern 25. For example, the light source unit 30 projects a moving image on the wall surface of the bathroom 100 as the irradiation pattern 25. Thereby, the user who uses the bathroom 100 can enjoy a moving image in the bathroom 100. The irradiation pattern 25 may be a still image. The irradiation pattern 25 may be a captured image (moving image or still image), or may be an artificially created pattern (pattern) that is not a captured image. The irradiation pattern 25 may be a pattern created based on a photographed image such as a pattern imitating a sunbeam.

  Here, the irradiation pattern 25 may include character information 26. In the example of FIG. 1, the irradiation pattern 25 includes character information 26 indicating the temperature of hot water in the bathtub. Thereby, the user can obtain information on the temperature of hot water in the bathtub according to the character information 26.

  Note that the character information 26 may be vital sensing information of a user who uses the bathroom 100. The vital sensing information is, for example, the user's body temperature, heart rate, blood pressure, and the like. The character information 26 may be guide information for guiding the user such as a correct bathing method. The character information 26 may be date information or time information.

  As described above, particularly when the light projected from the light source unit 30 has the irradiation pattern 25, the irradiation pattern 25 becomes unclear when the plate-like member 20 is clouded.

  Therefore, the lighting device 10 includes the anti-fogging coat layer 40 on the surface of the plate-like member 20. Thereby, the user using the bathroom 100 can obtain a clear irradiation pattern 25. That is, the user who uses the bathroom 100 can obtain clear light.

  Hereafter, each component which comprises the illuminating device 10 is demonstrated in detail, referring FIG.1 and FIG.2 continuously.

[Plate-shaped member]
The plate-like member 20 is a plate-like member having translucency that is disposed in an opening provided in the ceiling 50. Specifically, the plate-like member 20 has a shape and size corresponding to an opening provided in the ceiling 50 and is fitted into the opening. The plate-like member 20 may be larger than the opening provided in the ceiling 50 and may be disposed so as to close the opening. At this time, the plate-like member 20 may be disposed on the indoor side of the ceiling 50 to close the opening, or may be disposed on the back side of the ceiling to close the opening.

  The planar view shape of the plate-like member 20 is a rectangle, but may be other shapes such as a circle. As shown in FIGS. 1 and 2, when the plate-like member 20 is fitted into the opening provided in the ceiling 50, the plate-like member 20 may have a shape corresponding to the opening.

  The plate-like member 20 is specifically a transparent acrylic plate, but may be a glass plate. The plate-like member 20 may be formed of any material as long as it has translucency. The plate-like member 20 may include a half mirror layer. Thereby, when the light source unit 30 is not emitting light, the plate-like member 20 looks like a mirror from the inside of the bathroom 100, so that it is possible to prevent the back of the ceiling from being seen through. That is, it is suppressed that the atmosphere in the bathroom 100 is impaired.

  An anti-fogging coat layer 40 is provided on the lower surface of the plate-like member 20. The anti-fogging coat layer 40 is an example of an anti-fogging portion, and suppresses fogging of the lower surface (inner side surface) of the plate-like member 20. Specifically, the anti-fogging coating layer 40 is a coating layer that generates heat by absorbing at least one of ultraviolet rays and infrared rays. Such a coat layer is formed, for example, by adding at least one of an ultraviolet absorber and an infrared absorber to a resin that is a base material. The infrared absorbing material and the ultraviolet absorbing material are, for example, metal oxide fine particles.

  When such an anti-fogging coat layer 40 is employed, the light emitted from the light source unit 30 may include at least one of infrared rays and ultraviolet rays. Thereby, the illuminating device 10 can perform the fogging prevention of the plate-like member 20 using the light emitted from the light source unit 30.

  The anti-fogging coating layer 40 is not limited to a structure that generates heat by absorbing at least one of ultraviolet rays and infrared rays, and other coating layers such as a water-repellent coating layer can be used as long as fogging of the plate-like member 20 can be suppressed. A coat layer may be used.

  The anti-fogging coat layer 40 may be formed by applying a paint, or may be formed by attaching a sheet. Further, the anti-fogging coat layer 40 may be provided not only on the lower surface of the plate-like member 20 but also on the upper surface of the plate-like member 20 or may cover the entire surface of the plate-like member 20.

  By forming such an anti-fogging coat layer 40, a user who uses the bathroom 100 can obtain a clear irradiation pattern 25.

[Light source]
The light source unit 30 is disposed above the ceiling 50 and projects light into the bathroom 100 via the plate-like member 20. In the example of FIG. 2, the light source unit 30 is provided in the upper structure constituting the space behind the ceiling, but may be placed on the ceiling 50.

  As FIG. 2 shows, the incident angle to the plate-shaped member 20 of the optical axis J of the light which the light source part 30 emits is good to be an acute angle. Thereby, when the user looks up at the plate-like member 20 from the bathroom 100, the light source unit 30 is difficult to see directly, so that the glare can be reduced.

  The light source unit 30 can project light (for example, an image) having an irradiation pattern 25 that changes over time. Hereinafter, a specific configuration of the light source unit 30 will be described. FIG. 3 is a diagram illustrating a specific configuration of the light source unit 30.

  As shown in FIG. 3, the light source unit 30 includes a white light source 31, a collimating lens 32a, an integrator lens 33, a polarizing beam splitter 34, a condensing lens 35, and a collimating lens 32b. The light source unit 30 includes an incident side polarizing element 36a, an image element 37, an output side polarizing element 36b, and a projection lens 38. The light source unit 30 includes an acquisition unit 39a and a control unit 39b.

  The white light source 31 is a light source that emits white light. The white light source 31 is a light source using a solid light emitting element such as an incandescent lamp, a discharge lamp (including a fluorescent lamp), a light emitting diode (LED), a semiconductor laser, an organic EL (Electro Luminescence), or an inorganic EL.

  The light emitted from the white light source is collimated in the collimator lens 32a, and the illuminance distribution is made uniform by the integrator lens 33. The light whose illuminance distribution is made uniform is converted into linearly polarized light by the polarization beam splitter 34. Here, as an example, light with a uniform illuminance distribution is converted into P-polarized light.

  The light converted to P-polarized light enters the condenser lens 35, is collimated by the collimator lens 32b, and enters the incident-side polarizing element 36a.

  The incident side polarization element 36 a is a polarizing plate (polarization control element) that polarizes light incident toward the image element 37. The exit side polarization element 36 b is a polarizing plate that polarizes the light emitted from the video element 37.

  The light incident on the incident-side polarizing element 36 a enters the image element 37 because the incident-side polarizing element 36 a transmits P-polarized light, and is modulated and emitted according to the image displayed on the image element 37. The

  The video element 37 is a substantially planar element that converts incident light into light corresponding to a video signal and outputs the converted light. Specifically, the image element 37 is a transmissive liquid crystal panel, and converts incident light into S-polarized light corresponding to the image signal and outputs the light.

  Unlike the incident side polarizing element 36a, the outgoing side polarizing element 36b transmits only S-polarized light. Therefore, the light-modulated S-polarized light passes through the output-side polarizing element 36 b and enters the projection lens 38. As a result, the light modulated according to the image by the projection lens 38, that is, the irradiation pattern 25 is projected. The projection lens 38 is a lens for projecting light onto an object, in other words, a lens used for imaging light onto the object.

  The acquisition unit 39a acquires a video signal. The video signal is acquired from, for example, a personal computer, a cloud server, or a recording medium on which the video signal is recorded.

  Moreover, the acquisition part 39a acquires the information used as the basis of the character information 26, such as the temperature information of a bathtub, and the vital sensing information of the user who uses the bathroom 100. FIG. The temperature information of a bathtub is acquired from the temperature sensor provided in the bathtub, for example. The vital sensing information is acquired from, for example, a wearable terminal attached to the user's body.

  The acquisition unit 39a is specifically a communication interface or a communication circuit, and wired or wireless communication is used to acquire information of the acquisition unit 39a. The communication protocol used for communication is not particularly limited.

  The control unit 39 b is a control device that controls the white light source 31 and the image element 37. The control unit 39b controls, for example, turning on, turning off, and brightness of the white light source 31. Further, the control unit 39b controls the modulation of the light of the video element 37 based on the video signal acquired by the acquisition unit 39a and the information that is the basis of the character information 26. Thereby, an image (irradiation pattern 25) is projected on the wall surface of the bathroom 100 as shown in FIG.

  The control unit 39b can also project monochromatic light by controlling the video element 37. That is, illumination light (white light) that does not have the irradiation pattern 25 can be irradiated.

  Specifically, the control unit 39b is realized by a processor, a microcomputer, a dedicated circuit, or the like.

  The light source unit 30 employs a so-called single-plate optical system, but a three-plate optical system may be used. The light source unit 30 may be an optical system including a color wheel. In the light source unit 30, a transmissive image element is used as the image element 37, but a reflective image element may be used. The reflective image element is, for example, a micromirror array or a reflective liquid crystal panel (LCOS: Liquid Crystal On Silicon).

[Effects]
As described above, the lighting device 10 is translucent and has the plate-like member 20 disposed in the opening provided in the ceiling 50 and the plate-like member 20 disposed above the ceiling 50. The light source part 30 which projects light indoors, and the fog prevention coating layer 40 which suppresses fogging of the plate-shaped member 20 are provided. The anti-fogging coat layer 40 is an example of a coat layer provided on the surface of the plate-like member 20 that functions as a fog suppression unit.

  Thereby, since the cloudiness of the plate-shaped member 20 is suppressed, the user who uses the illuminating device 10 can obtain clear light.

  Further, the anti-fogging coating layer 40 may be a coating layer that generates heat by absorbing at least one of ultraviolet rays and infrared rays.

  Thereby, the fog prevention coating layer 40 can suppress fogging of the plate member 20 by absorbing ultraviolet rays and infrared rays.

  The light emitted from the light source unit 30 includes at least one of ultraviolet rays and infrared rays, and the anti-fogging coat layer 40 absorbs at least one of ultraviolet rays and infrared rays contained in the light emitted from the light source units 30 and generates heat. May be.

  Thereby, the anti-fogging coat layer 40 can suppress the fogging of the plate-like member 20 using the light emitted from the light source unit 30.

  The plate-like member 20 may include a half mirror layer.

  Thereby, when the light source unit 30 is not emitting light, the plate-like member 20 looks like a mirror from the inside of the bathroom 100, so that it is possible to prevent the back of the ceiling from being seen through. That is, it is suppressed that the atmosphere in the bathroom 100 is impaired.

  Further, the incident angle of the optical axis of the light emitted from the light source unit 30 to the plate-like member 20 may be an acute angle.

  Thereby, when the user looks up at the plate-like member 20 from the bathroom 100, the light source unit 30 is difficult to see directly, so that the glare can be reduced.

  The light source unit 30 may project light having an irradiation pattern 25 that changes with time.

  Thereby, the user using the bathroom 100 can enjoy the irradiation pattern 25 that changes over time in the bathroom 100. The irradiation pattern 25 that changes with time is, for example, a moving image.

  The light source unit 30 may project light having an irradiation pattern 25 including character information 26.

  Thereby, the user can obtain information according to the character information 26.

  The bathroom 100 (unit bath) includes a lighting device 10 and a ceiling 50.

  Thereby, since the cloudiness of the plate-shaped member 20 is suppressed, the user using the bathroom 100 can obtain clear light.

(Embodiment 2)
The fog prevention part may be a member or a structure for suppressing fogging of the plate-like member 20, and is not limited to the fog prevention coat layer 40. For example, the fogging suppression unit may suppress the fogging of the plate-like member 20 by heating the plate-like member 20 with heat generated by the light source unit 30.

  Specifically, the fog suppression unit may be a housing that houses the light source unit 30. Hereinafter, the lighting apparatus according to Embodiment 2 including a housing will be described. FIG. 4 is a diagram illustrating a schematic configuration of the illumination apparatus according to Embodiment 2. In the following second embodiment, description will be made mainly on differences from the first embodiment, and detailed description of matters already described in the first embodiment may be omitted.

  As illustrated in FIG. 4, the lighting device 10 a includes a light source unit 30, a mirror 70, a plate-like member 20, and a housing 60.

  The light source unit 30 has the same configuration as that of the first embodiment except that the light source unit 30 is accommodated in the housing 60.

  The mirror 70 is an optical member that reflects light emitted from the light source unit 30 toward the plate-like member 20. In addition, the mirror 70 should just be provided as needed and is not essential.

  In the second embodiment, the plate-like member 20 is attached to an opening provided in the housing 60 and is disposed in an opening 50 a provided in the ceiling 50. In other words, the plate-like member 20 attached to the opening provided in the housing 60 closes the opening 50 a provided in the ceiling 50. In the second embodiment, the plate member 20 is not provided with the anti-fogging coating layer 40, but may be provided.

  The housing 60 has an opening to which the plate-like member 20 is attached and accommodates the light source unit 30. The housing 60 has a substantially rectangular parallelepiped shape, but may have other shapes. Moreover, the housing | casing 60 may be formed with metal materials, such as aluminum, and may be formed with a resin material.

  As described above, when the light source unit 30 is accommodated in the housing 60, heat generated during operation of the light source unit 30 is trapped in the housing 60. That is, the air in the housing 60 becomes higher than the temperature of the air outside the housing 60. If it does so, since the plate-shaped member 20 which has block | closed the opening part of the housing | casing 60 is warmed with the heat | fever which the light source part 30 emits, the cloudiness of the plate-shaped member 20 is suppressed.

  As described above, the fog prevention unit may suppress fogging of the plate member 20 by heating the plate member 20 with the heat generated by the light source unit 30.

  Thereby, the cloud of the plate-shaped member 20 can be suppressed using the heat which the light source part 30 emits.

  Specifically, the fogging suppression unit may be a housing 60 that has an opening to which the plate-like member 20 is attached and that houses the light source unit 30.

  Thereby, since the fog of the plate-like member 20 is suppressed by the heat generated by the light source unit 30, the user who uses the lighting device 10a can obtain clear light.

(Embodiment 3)
The fogging suppression unit may be a blower that generates wind from the light source unit 30 toward the plate-like member 20. Hereinafter, the illuminating device which concerns on Embodiment 3 provided with an air blower is demonstrated. FIG. 5 is a diagram illustrating a schematic configuration of the illumination apparatus according to Embodiment 3. In the following third embodiment, description will be made mainly on the differences from the first embodiment, and detailed description of matters already described in the first embodiment may be omitted.

  As illustrated in FIG. 5, the lighting device 10 b includes a light source unit 30, a plate-like member 20, and a blower 80.

  The light source unit 30 and the plate-like member 20 have the same configuration as in the first embodiment. In Embodiment 3, the plate member 20 is not provided with the anti-fogging coat layer 40, but may be provided. Further, as in the second embodiment, the lighting device 10b may further include a housing that has an opening to which the plate-like member 20 is attached and that houses the light source unit 30 and the blower 80.

  The blower 80 generates a wind from the light source unit 30 toward the plate member 20. Thereby, the heat generated during the operation of the light source unit 30 is forced toward the plate-like member 20 and the plate-like member 20 is warmed, so that fogging of the plate-like member 20 is suppressed.

  The blower 80 includes a blower fan, a motor that rotates the blower fan, and a drive device for the motor. The air blower 80 may be built in the light source unit 30. In this case, the blower 80 may generate a wind from the white light source 31 of the light source unit 30 toward the plate member.

  As described above, the fogging suppression unit may be the blower 80 that generates the wind from the light source unit 30 toward the plate member 20.

  Thereby, since the fog of the plate-like member 20 is suppressed by the heat generated by the light source unit 30, the user who uses the lighting device 10b can obtain clear light.

(Embodiment 4)
As described above, the light source unit 30 can emit illumination light that does not have the irradiation pattern 25. The illumination light is preferably white light, but may be light of other colors.

  At this time, the plate-like member 20 may scatter and transmit light from the light source unit 30. Specifically, the plate-like member 20 may cause Rayleigh scattering (including scattering in a mode close to Rayleigh scattering) at least part of the light from the light source unit 30. Thereby, since the plate-shaped member 20 arrange | positioned at the opening part of the ceiling 50 looks blue like a blue sky, the user of the bathroom 100 can experience the comfort of a blue sky while staying in the bathroom 100.

  Hereinafter, the lighting apparatus according to the fourth embodiment will be described. FIG. 6 is a diagram illustrating a schematic configuration of a lighting apparatus according to Embodiment 4. In the following fourth embodiment, the description will focus on the differences from the second embodiment, and detailed description of matters already described in the second embodiment may be omitted.

  As illustrated in FIG. 5, the lighting device 10 c includes a light source unit 30, a mirror 70, a plate-like member 20 c, and a housing 60.

  The light source unit 30, the mirror 70, and the housing 60 have the same configuration as that of the second embodiment. In the fourth embodiment, even when the light source unit 30 emits illumination light, the plate-like member 20c looks like a blue sky, so that an impression that sunlight is inserted from the outside can be given. Therefore, the video element 37 and the like described in FIG. 3 are not essential, but the video element 37 and the like may be used together.

The plate-like member 20c is produced, for example, by forming a plate in which particles having a size of several nanometers to several tens of nanometers are dispersed in a translucent base material such as acrylic. The particles are, for example, metal oxides, and specifically, titanium group oxides such as ZrO ₂ (zirconia) and TiO ₂ (titania). In addition, metal oxides such as ZnO and Nb ₂ O ₅ may be used as the particles.

  The plate-like member 20c may be manufactured by applying a coating material in which the above particles are dispersed to a plate material made of acrylic. The plate-like member 20c may be manufactured by attaching a film in which the above particles are dispersed to a plate material formed of acrylic.

  The plate-like member 20c produced as described above has light scattering characteristics as shown in FIG. FIG. 7 is a diagram for explaining the light scattering characteristics of the plate-like member 20c.

  As shown in FIG. 7, the plate-like member 20 c has a characteristic that as the wavelength becomes shorter, the scattering rate with respect to light of the wavelength becomes higher. The scattering rate shown in FIG. 7 means the ratio of the amount of light that is scattered and emitted (the amount of light that does not pass straight) to the amount of incident light. For example, the light scattering rate for blue light near 450 nm is higher than the light scattering rate for red light near 650 nm. The light scattering rate for blue light near 450 nm is about twice the light scattering rate for red light near 650 nm.

  As a result, the color temperature of the light obtained by light scattering in the plate-like member 20c is higher than the color temperature of the light transmitted through the plate-like member 20c, and for the user, the plate-like member 20c is blue like a blue sky. Looks like.

  As described above, the light source unit 30 may emit illumination light. The plate-like member 20c transmits and scatters the illumination light emitted from the light source unit 30, and the color temperature of the light obtained by the scattering may be higher than the color temperature of the light obtained by the transmission.

  Thereby, the plate-shaped member 20 arrange | positioned at the opening part of the ceiling 50 looks blue like a blue sky. For this reason, the user of the bathroom 100 can experience the comfort of the blue sky while in the bathroom 100.

  Further, by providing the fogging suppression unit such as the housing 60 in the lighting device 10c, the user can obtain a clear blue color.

  In the fourth embodiment, the plate-like member 20c is attached to the opening of the housing 60, but may be attached to the opening of the ceiling 50 as in the first embodiment. At this time, the plate-like member 20c may be detachably (removably) attached to the opening of the ceiling 50.

  Specifically, the plate-like member 20 c may have a structure that can be attached to and detached from the opening of the ceiling 50. Such a structure is, for example, a screw hole or the like provided in the plate-like member 20c and through which a mounting screw is inserted, but is not particularly limited. The plate-like member 20c may have a member for attaching and detaching the plate-like member 20c to the opening of the ceiling 50. Such a member is, for example, an elastic body such as a magnet and packing that elastically deforms in the gap between the plate-like member 20c and the opening, but is not particularly limited.

  Thereby, the plate-like member 20c can be replaced with the plate-like member 20. The user can change the viewing of the image and the blue illumination such as the blue sky by selectively using the plate-like member 20 and the plate-like member 20c.

(Other embodiments)
As mentioned above, although the illuminating device and bathroom which concern on embodiment (Embodiment 1-4) were demonstrated, this invention is not limited to the said embodiment.

  For example, in the said embodiment, although the illuminating device was used in the bathroom, you may use it in quality rooms other than a bathroom. For example, you may use in the place etc. where fogging of a plate-shaped member is easy to generate | occur | produce, such as the entrance of a building.

  In addition, one or a plurality of modes may be used in the present embodiment in which various modifications conceived by those skilled in the art have been made in this embodiment, or in a configuration constructed by combining components in different embodiments, without departing from the spirit of the present invention. It may be included in the range.

10, 10a, 10b, 10c Illumination device 20, 20c Plate member 25 Irradiation pattern 26 Character information 30 Light source part 40 Anti-fogging coat layer (coat layer)
50 ceiling 50a opening 60 housing 80 blower 100 bathroom

Claims (14)

A plate-like member having translucency and disposed in an opening provided in the ceiling;
A light source unit disposed above the ceiling and projecting light into the room through the plate-like member;
An illuminating device comprising: a fog suppression unit that suppresses fogging of the plate-like member. The lighting device according to claim 1, wherein the fogging suppression unit is a coat layer provided on a surface of the plate-like member. The lighting device according to claim 2, wherein the coating layer generates heat by absorbing at least one of ultraviolet rays and infrared rays. The light emitted from the light source unit includes at least one of ultraviolet rays and infrared rays,
The lighting device according to claim 3, wherein the coat layer absorbs at least one of ultraviolet rays and infrared rays contained in light emitted from the light source unit and generates heat. The lighting device according to claim 1, wherein the fog suppression unit suppresses fogging of the plate member by heating the plate member with heat generated by the light source unit. The lighting device according to claim 4, wherein the fogging suppression unit is a housing that has an opening to which the plate-like member is attached and that houses the light source unit. The illuminating device according to claim 4, wherein the fogging suppression unit is a blower that generates wind from the light source unit toward the plate member. The lighting device according to claim 1, wherein the plate-like member includes a half mirror layer. The illuminating device according to any one of claims 1 to 8, wherein an incident angle of an optical axis of light emitted from the light source unit to the plate member is an acute angle. The light source unit emits illumination light,
The plate-like member transmits and scatters illumination light emitted from the light source unit,
The illuminating device according to any one of claims 1 to 9, wherein a color temperature of light obtained by the scattering is higher than a color temperature of light obtained by the transmission. The lighting device according to claim 1, wherein the light source unit projects light having an irradiation pattern that changes over time. The lighting device according to claim 1, wherein the light source unit projects light having an irradiation pattern including character information. The lighting device according to claim 1, wherein the plate-like member is detachably attached to the opening provided in the ceiling. The lighting device according to any one of claims 1 to 13,
A bathroom comprising the ceiling.

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