WO2017141619A1

WO2017141619A1 - Image projection system and bathroom

Info

Publication number: WO2017141619A1
Application number: PCT/JP2017/001863
Authority: WO
Inventors: 雄司細田; 小泉　秀樹; 大野　達司
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2016-02-17
Filing date: 2017-01-20
Publication date: 2017-08-24
Also published as: JP6575881B2; JPWO2017141619A1

Abstract

This image projection system has: a projector (12) which is disposed on the backside of a ceiling material (102) that defines an interior space of a room, and which is provided with an emission part (12a) for emitting projection light into the room via an opening (102a) formed in the ceiling material (102); a cover member (16) which blocks the opening (102a), and which allows transmission of the projection light from the projector (12); and a case member (18) which covers the emission part (12a) of the projector (12) and the cover member (16), and which forms an internal space for the projection light, traveling from the emission part (12a) of the projector (12) to the opening (102a), to pass through.

Description

Image projection system and bathroom

The present invention relates to an image projection system for projecting an image and a bathroom.

Conventionally, projectors that project images onto screens or indoor walls are used. For example, as described in Patent Document 1, a projector that projects an image on a wall material surface of a bathroom is known. In the case of the projector of Patent Document 1, a heater is provided on the wall material surface portion in order to remove water droplets attached to the wall material surface portion on which the image is projected. Thereby, a favorable image is projected on the wall material surface.

By the way, when an image is projected in a hot and humid room such as a bathroom as described in Patent Document 1, it is necessary to take measures against water droplets adhering to the projector, in particular, water droplets adhering to the emitting portion that emits projection light. It is. If water droplets adhere to the emission part, the projector may not be able to project a good image (for example, an image with a sharp outline).

An image projecting apparatus that can cope with this problem and projects an image on the wall surface of a hot and humid bathroom described in Patent Document 2 is known. This image projection device projects an image from outside the bathroom onto a wall surface in the bathroom via a transparent waterproof cover incorporated in the bathroom wall. In addition, in order to remove condensation (water) adhering to the bathroom inner surface of the transparent waterproof cover or to suppress the occurrence of condensation, exhaust the air from the image projection device through the duct on the bathroom inner surface or the bathroom outer side. It is comprised so that it may eject to the surface.

JP 2002-295031 A JP 2002-271716 A

In the case of the above-mentioned Patent Document 2, even if the exhaust gas from the image projection device is ejected to the transparent waterproof cover, the exhaust amount (heat amount) is not sufficient, and the dew condensation generated on the transparent waterproof cover cannot be sufficiently removed or the occurrence thereof is sufficient. May not be able to be suppressed.

Also, when the image projection device is arranged on the back side of the ceiling material or wall material that defines the bathroom, there is a possibility that dust, insects, etc. may adhere to the outer surface of the bathroom of the transparent waterproof cover.

As a result, there is a possibility that a good image cannot be projected from outside the bathroom.

Therefore, an object of the present invention is to project a good image when projecting an image from outside the room in a hot and humid room such as a bathroom.

In order to solve the above technical problem, according to one aspect of the present invention,
A projector provided on the back side of a ceiling material or wall material that defines an indoor space, and having an emission part that emits projection light into the room through an opening provided in the ceiling material or wall material;
A cover member that closes the opening of the ceiling material or wall material and transmits the projection light of the projector;
An image projection system is provided that includes a case member that covers an emission part and a cover member of the projector and forms an internal space through which projection light from the emission part of the projector toward the opening passes.

According to another aspect of the present invention,
A bathroom with an image projection system,
Image projection system
A projector provided on the back side of a ceiling material or wall material that defines an indoor space, and having an emission part that emits projection light into the room through an opening provided in the ceiling material or wall material;
A cover member that closes the opening of the ceiling material or wall material and transmits the projection light of the projector;
A bathroom is provided that includes a case member that covers an emission part and a cover member of the projector and forms an internal space through which projection light traveling from the emission part of the projector toward the opening passes.

According to the present invention, when an image is projected from outside the room into a hot and humid room such as a bathroom, a good image can be projected.

The figure which shows schematically the bathroom which concerns on Embodiment 1 of this invention. 1 is a schematic perspective view of an image projection system according to Embodiment 1 of the present invention. Sectional view of the image projection system along line AA in FIG. Sectional view of the image projection system along line BB in FIG. Top view of heater and cover member Schematic perspective view of an image projection system according to Embodiment 2 of the present invention. Schematic perspective view of the image projection system according to the second embodiment of the present invention viewed from different directions Sectional view of the image projection system along line CC in FIG. FIG. 6 is a top sectional view showing the internal configuration of the image projection system according to Embodiment 2 of the present invention Schematic perspective view of projector Schematic perspective view of the projector from different directions Sectional drawing of the image projection system which concerns on another embodiment Sectional drawing of the image projection system which concerns on another embodiment

An image projection system according to an aspect of the present invention is disposed on the back side of a ceiling material or wall material that defines an indoor space, and emits projection light into the room through an opening provided in the ceiling material or wall material. Projector provided with an emission part, a cover member that closes the opening of the ceiling or wall material, covers the projection light of the projector, covers the emission part and the cover member of the projector, and projects from the emission part of the projector toward the opening And a case member that forms an internal space through which light passes.

According to such a configuration, a good image can be projected when projecting an image from outside the room in a hot and humid room such as a bathroom.

The case member may include a photothermal conversion surface that converts light from the projector into heat on the inner surface. By using heat converted from a part of the light from the projector, water droplets are prevented from adhering to the emission part of the projector. Moreover, adhesion of water droplets to the cover member is also suppressed. As a result, the projector can project a good image into the room through the cover member.

The photothermal conversion surface may be arranged on the inner surface portion of the case member that is a part of the projection light of the projector and that receives the reflected light reflected by the cover member. Thereby, the reflected light reflected by the cover member can be converted into heat.

The photothermal conversion surface of the case member may be a mat surface.

The photothermal conversion surface of the case member may be black.

The bathroom outer surface of the cover member on which the projection light of the projector enters may be provided with a smooth surface. As a result, the intensity of the reflected light increases, and as a result, the amount of heat generated on the photothermal conversion surface increases.

The image projection system may include a heater attached to the cover member so as to be covered by the case member and heating the cover member. The heater supplementarily heats the cover member, so that the adhesion of water droplets to the cover member is further suppressed.

When the cover member is attached to the back side part of the ceiling material or the back side part of the wall material via the heat insulating member, the heater is attached to the cover member so as not to face the heat insulating member across the cover member. preferable. Thereby, the movement of the heat of the heater to the heat insulating member can be suppressed, and the cover member can be sufficiently warmed.

The projector has an intake port for taking in external air and an exhaust port for discharging the internal air to the outside, and the image projection system communicates the exhaust port of the projector and the internal space of the case member. And a duct member that supplies exhaust from the projector to the internal space of the case member. Thereby, the internal space of the case member can be warmed by the exhaust from the projector.

The projector may include an internal fan facing the exhaust port communicating with the internal space of the duct member. Accordingly, a large amount of projector exhaust is supplied to the internal space of the case member via the duct member. As a result, the occurrence of condensation on the cover member can be further suppressed.

A filter may be provided at the inlet of the duct member. Thereby, the penetration | invasion of the dust etc. to the internal space of a case member is suppressed via a duct member.

The case member may be provided with an outlet for communicating the internal space with the outside and discharging the projector exhaust supplied via the duct member to the outside, and a filter may be provided at the outlet of the case member. Thereby, the penetration | invasion of the dust etc. to the internal space of a case member is suppressed via the exit of a case member.

A sealing member may be disposed between the edge of the duct member inlet and the edge of the projector exhaust. Thus, more projector exhaust is supplied to the internal space of the case member via the duct member.

The image projection system may include a projector attachment member that accommodates the projector and is attached to the back side of the ceiling material or the wall material in a state where the emission unit is exposed to the outside. In this case, the projector mounting member may include an air intake port that communicates between the internal space and the outside and is provided at a portion facing the air intake port of the projector housed in the internal space. Thereby, the projector 12 is protected from dust and the like, and air outside the projector mounting member can be taken into the projector through the air intake port of the projector mounting member and the air intake port of the projector.

The projector mounting member has an air outlet that communicates the internal space with the outside, and is provided on the projector mounting member so as to face the air outlet, and has an external fan that blows air inside the projector mounting member to the outside. May be. Thereby, the temperature rise inside the projector mounting member is suppressed, and as a result, the projector can be sufficiently suppressed from reaching a high temperature state.

The image projection system has a temperature sensor that detects the temperature of the projector, and a control device that controls the external fan based on the temperature detection result of the temperature sensor, and the control device is a temperature at which the temperature sensor exceeds a predetermined temperature. The external fan may continue to be driven during detection. Thereby, it can suppress efficiently that a projector will be in a high temperature state.

The projector mounting member may be made from a non-flammable material or a flame retardant material. As a result, when projecting images from a projector installed outside the room in a hot and humid room such as a bathroom, install the projector with sufficient countermeasures against short circuit due to moisture and dust in the projector and ignition due to the short circuit. be able to.

The case member may be made from a nonflammable material or a flame retardant material. Thereby, it is possible to more sufficiently take measures against ignition.

The projector mounting member and the case member may be integrated as one part. Thereby, it is possible to more sufficiently take measures against ignition.

The projector may be accommodated in the projector mounting member in a state of being supported by being suspended from the top plate portion of the projector mounting member. This makes it difficult for moisture to enter the projector.

The projector mounting member may be provided with a seal member that blocks the flow of air from the internal space of the case member to the internal space of the projector mounting member through the through hole of the projector mounting member through which the light emitting portion of the projector passes. This suppresses moisture from returning from the internal space of the case member to the internal space of the projector mounting member.

A phosphorescent layer may be provided on at least a part of the inner surface of the case member. Thereby, even if the projection of the projector stops and the bathroom becomes dark, the user can safely exit the bathroom by using the light emission of the phosphorescent layer.

Moreover, the bathroom which is another aspect of this invention is a bathroom provided with an image projection system, Comprising: An image projection system is arrange | positioned on the back side of the ceiling material or wall material which defines indoor space, and a ceiling material or wall A projector having an emission part that emits projection light into the room through an opening provided in the material, a cover member that closes the opening of the ceiling material or wall material, and through which the projection light of the projector passes, and the emission part and cover of the projector And a case member that forms an internal space through which the projection light directed from the emission part of the projector to the opening passes.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

In addition, the inventors provide the accompanying drawings and the following description in order for those skilled in the art to fully understand the present disclosure, and these are intended to limit the subject matter described in the claims. It is not a thing.

(Embodiment 1)
FIG. 1 schematically shows a bathroom according to Embodiment 1 of the present invention.

As shown in FIG. 1, the bathroom 100 includes a ceiling material 102, a plurality of wall materials 104, and a floor material 106. The interior space of the bathroom 100 is defined by the ceiling material 102, the plurality of wall materials 104, and the floor material 106.

The bathroom 100 is configured to project the image P on the front side portion of one wall material 104. In this specification, the front side of the ceiling material 102 and the wall material 104 refers to the inside of the bathroom, and the back side refers to the outside of the bathroom.

In the case of the first embodiment, as shown in FIG. 1, the image projection system 10 that projects the image P toward the wall material 104 is disposed on the back side of the ceiling material 102. In order to project the image P into the bathroom 100 from the image projection system 10 arranged on the back side of the ceiling material 102, the ceiling material 102 is provided with an opening 102a. In addition, an inspection port 102 b that can be used for placing the image projection system 10 on the back side of the ceiling material 102 is provided in the ceiling material 102.

FIG. 2 schematically shows the image projection system 10 disposed on the back side of the ceiling material 102 of the bathroom 100. FIG. 3 shows a cross section of the image projection system 10 along the line AA shown in FIG. Further, FIG. 4 shows a cross section of the image projection system 10 along the line BB shown in FIG. In the figure, an XYZ coordinate system is shown to facilitate understanding of the invention. The X-axis direction and the Y-axis direction indicate the horizontal direction, and the axial direction indicates the vertical direction.

As shown in FIG. 3, the image projection system 10 includes a projector 12 that emits the projection light L toward the wall material 104 of the bathroom 100 (projects the image P), and a projector for attaching the projector 12 to the ceiling material 102. The mounting member 14 includes a cover member 16 that closes the opening 102 a of the ceiling member 102, and a case member 18 that covers the cover member 16.

In the case of the first embodiment, as shown in FIG. 3, the projector mounting member 14 is in a box shape with a lid that accommodates the projector 12 therein, and is attached to the rear side portion 102 c of the ceiling material 102 with, for example, screws or adhesives. It is fixed with agents. The projector mounting member 14 includes a lid-shaped top plate portion 20 that supports the projector 12 in a suspended manner, and a base portion 22 that has an upper opening through which the projector 12 passes and supports the top plate portion 20.

The base portion 22 of the projector mounting member 14 includes a through hole 22a through which the emission portion 12a of the projector 12 that emits the projection light L passes.

Furthermore, in the case of the first embodiment, the projector 12 is supported by the projector mounting member 14 in a state in which the emitting portion 12a is directed obliquely downward. Thereby, the projector 12 can emit the projection light L from the back side of the ceiling material 102 into the bathroom 100 through the opening 102a.

According to such a projector attachment member 14, the projector 12 is attached to the back side portion 102c of the ceiling material 102, and is protected from dust and the like. Further, by being supported in a downwardly inclined posture by the projector mounting member 14, the projector 12 emits the projection light L from the emitting portion 12 a into the bathroom 100 through the opening 102 a of the ceiling material 102. Can do.

The opening 102 a of the ceiling material 102 is necessary for projecting the image P into the bathroom 100 from the projector 12 disposed on the back side of the ceiling material 102. However, water droplets may adhere to the projector 12 due to moisture in the bathroom 100 that has passed through the opening 102 a and moved to the back side of the ceiling material 102. In particular, if water droplets adhere to the emitting portion 12a of the projector 12, there is a possibility that a good image P cannot be projected on the front side portion of the wall material 104 of the bathroom 100.

In order to suppress adhesion of water droplets to the projector 12, a cover member 16 that closes the opening 102a of the ceiling material 102 is provided.

In the case of the first embodiment, as shown in FIG. 3, the cover member 16 is attached with the seal member 24 interposed to the back side portion 102c of the ceiling material 102 so as to close the opening 102a of the ceiling material 102. It has been. For example, the cover member 16 is fixed to the ceiling member 102 with screws, an adhesive, or the like.

The cover member 16 includes a light transmitting portion 16a that is disposed in the opening 102a of the ceiling member 102 and through which the projection light L emitted from the emitting portion 12a of the projector 12 is transmitted. Therefore, at least the light transmission part 16a of the cover member 16 is made of glass or a resin material.

According to such a cover member 16, the movement of steam from the bathroom 100 to the back side of the ceiling material 102 is suppressed. Thereby, adhesion of water droplets to the projector 12 is suppressed, and the projector 12 projects a good image P on the front side portion of the wall material 104 of the bathroom 100 through the cover member 16 as shown in FIG. Can do.

When the temperature of the interior space of the bathroom 100 is higher than the temperature of the back space of the ceiling material 102 and the temperature difference is large, condensation occurs on the inner surface of the bathroom of the cover member 16, that is, when water droplets adhere to the inner surface of the bathroom. There is. If water droplets adhere to the bathroom inner surface of the cover member 16, the projection light L from the projector 12 is scattered by the water droplets, and there is a possibility that a good image P cannot be projected on the front side portion of the wall material 104 of the bathroom 100.

Also, dust and insects in the back space of the ceiling material 102 are likely to adhere to the bathroom outer surface on the back side of the ceiling of the cover member 16 with the passage of time. Due to the attached dust or the like, there is a possibility that a good image P cannot be projected on the front side portion of the wall material 104 of the bathroom 100.

Therefore, the cover member 16 is covered in order to suppress the occurrence of condensation on the inner surface of the bathroom on the bathroom 100 side of the cover member 16 and to suppress the adhesion of dust and the like to the outer surface of the bathroom on the back side of the ceiling of the cover member 16. The case member 18 is disposed on the back side of the ceiling material 102.

Specifically, as shown in FIGS. 2 and 3, the case member 18 is configured and arranged so as to cover the cover member 16 and the emission part 12 a of the projector 12. Further, as shown in FIG. 3, the case member 18 has an internal space where the projection light L from the emitting portion 12 a of the projector 12 toward the opening 102 a of the ceiling material 102 passes and is substantially isolated from the back space of the ceiling material 102. A space 18a is formed. In other words, the bathroom outer surface on the back side of the ceiling of the light transmission part 16 a of the cover member 16 and the emission part 12 a of the projector 12 face the internal space 18 a of the case member 18. In the case of the first embodiment, the internal space 18a is defined by the case member 18, the cover member 16, and the projector mounting member 14 as shown in FIG. Is substantially isolated from.

In order to realize a liquid-tight space, in the case of the first embodiment, the case member 18 is placed and attached to the outer peripheral edge portion of the cover member 16 via the seal member 26. The case member 18 is attached to the projector attachment member 14 via a seal member 28.

Furthermore, the case member 18 includes a photothermal conversion surface 18b that converts light from the projector 12 into heat on the inner surface (the surface facing the internal space 18a). In addition, “photothermal conversion” in the present specification means that heat is generated by absorbing light.

In the case of the first embodiment, the case member 18 is made of a black or gray resin, and the photothermal conversion surface 18b is formed of a mat surface. Thereby, the photothermal conversion surface 18b absorbs the light from the projector 12 and generates heat.

Specifically, as shown in FIG. 3, a part of the projection light L emitted from the emission part 12 a of the projector 12 toward the opening 102 a of the ceiling member 102 is a bathroom of the light transmission part 16 a of the cover member 16. Reflect on the outer surface. The reflected light L 'reaches the inner surface of the case member 18, that is, the photothermal conversion surface 18b, and a part thereof is converted into heat. Further, light other than the projection light L emitted from the emission unit 12a of the projector 12, that is, scattered light that does not contribute to the projection of the image P reaches the photothermal conversion surface 18b and is converted into heat.

When the light from the projector 12 is converted into heat by the photothermal conversion surface 18b, the temperature of the case member 18 rises. At this time, since the internal space 18a of the case member 18 is substantially a sealed space, the temperature of the internal space 18a of the case member 18 also rises.

When the temperature of the internal space 18a of the case member 18 rises, the temperature difference between the internal space of the bathroom 100 and the internal space 18a of the case member 18 becomes small, and dew condensation occurs on the bathroom inner surface of the cover member 16 on the bathroom 100 side. Is suppressed (compared to the case without the case member 18). As a result, the projector 12 can project a good image P on the surface of the wall material 104 of the bathroom 100 via the cover member 16.

In the case of the first embodiment, the case member 18 is attached to the cover member 16 via the seal member 26 as shown in FIGS. Therefore, the transfer of heat from the case member 18 whose temperature has been increased to the cover member 16 is suppressed by the sealing member 26 functioning as a heat insulating material. As a result, the internal space 18a can be efficiently warmed by the case member 18 whose temperature has been increased. Therefore, it is preferable that the seal member 24 is excellent not only in sealing performance for liquid-tightly sealing the internal space 18a of the case member 18 but also in heat insulation.

However, in consideration of drying of the internal space 18a of the case member 18, as shown in FIGS. 2 and 4, a plurality of pieces of liquid, dust, insects and the like that can be substantially prevented from entering the side surface 18c of the case member 18. A vent 18d made of a minute through hole may be provided. Thereby, generation | occurrence | production of dew condensation in the internal space 18a of the case member 18 can be suppressed.

Further, the photothermal conversion surface 18b may be provided on the entire inner surface of the case member 18 or may be provided on a part thereof. As shown in FIG. 3, at least the photothermal conversion surface 18 b is disposed on the inner surface portion of the case member 18 where the reflected light L ′ from the cover member 16 strikes.

As described above, in order to more efficiently suppress the condensation of the cover member 16 using the heat converted from the light of the projector 12, the bathroom outer surface of the cover member 16 on which the projection light L of the projector 12 is incident has a smooth surface. preferable. Thereby, the intensity | strength of the reflected light L 'reflected on the bathroom outer surface of the cover member 16 and reaching the photothermal conversion surface 18b of the case member 18 increases. As a result, the amount of heat generated on the photothermal conversion surface 18a to which the reflected light L 'has reached increases.

Further, a visible light transmissive film or a visible light transmissive film that selectively transmits visible light and reflects infrared light may be provided on the bathroom outer surface of the cover member 16 on which the projection light L of the projector 12 enters.

Furthermore, in order to improve the photothermal conversion efficiency, the photothermal conversion surface 18b of the case member 18 is preferably an uneven surface rather than a flat surface. Thereby, the surface area of the photothermal conversion surface 18b increases and the amount of received light increases, and the photothermal conversion surface 18b can generate more heat.

Furthermore, the photothermal conversion surface 18b of the case member 18 may be configured by providing a photothermal conversion film or a photothermal conversion film containing carbon particles on the inner surface of the case member 18. That is, in Embodiment 1 of this invention, the photothermal conversion surface 18b of the case member 18 should just be a surface which can convert light into heat.

According to such a case member 18, it is possible to suppress dew condensation on the bathroom inner surface of the cover member 16 on the bathroom 100 side and to suppress adhesion of dust and the like to the bathroom outer surface on the ceiling back side of the cover member 16. it can.

For example, when the temperature is extremely low or cold, the temperature difference between the interior space of the bathroom 100 and the back space of the ceiling material 102 may be extremely large. In that case, it may take time until the condensation of the cover member 16 is sufficiently suppressed only by the heat converted from the light of the projector 12.

As shown in FIGS. 3 and 4, the image projection system 10 according to the present embodiment heats the cover member 16 in order to quickly and sufficiently perform the condensation suppression of the cover member 16 when the temperature is extremely low. A heater 30 is provided.

In the present embodiment, the heater 30 is a surface heater, for example, an electric heater or a PTC (Positive Temperature Coefficient) heater.

Further, as shown in FIGS. 3 and 4, the heater 30 is attached to the cover member 16 so as to be covered with the case member 18, that is, to be positioned in the internal space 18 a of the case member 18. Specifically, as shown in FIG. 5 when the cover member 16 is viewed from above, the light transmitting portion 16a of the cover member 16 is formed on the bathroom outer surface of the cover member 16 facing the internal space 18a of the case member 18. An annular heater 30 is attached so as to surround it.

According to such a heater 30, the cover member 16 is directly heated. Accordingly, the heater 30 can raise the temperature of the entire cover member 16 with a small amount of supplied power, and can vaporize water droplets adhering to the bathroom inner surface of the light transmitting portion 16a on the bathroom 100 side.

In addition, since the heater 30 is covered by the case member 18, the heat of the heater 30 does not move indefinitely to the space behind the ceiling member 102 (excluding the internal space of the case member 18), and the cover member 16 Used efficiently for heating. Thereby, the heater 30 can raise the temperature of the cover member 16 to a temperature at which dew condensation can be suppressed with a small amount of electric power. A part of the heat of the heater 30 is used to heat the internal space 18a of the surrounding case member 18.

Furthermore, in the case of the first embodiment, the cover member 16 is attached to the back side portion 102 c of the ceiling material 102 via the seal member 24. The seal member 24 functions as a heat insulating material, and heat transfer from the cover member 16 to the ceiling material 102 having a large heat capacity is suppressed. Thereby, the heater 30 can raise the temperature of the cover member 16 to a temperature at which dew condensation can be suppressed with a small amount of electric power.

Note that the heater 30 is preferably attached to the cover member 16 in a state of being separated from the case member 18 and the seal member 26 in order to efficiently heat the cover member 16. That is, the contact area between the heater 30 and the case member 18 and the contact area between the heater 30 and the seal member 26 are preferably zero if possible, and as small as possible otherwise. Thereby, the heat of the heater 30 does not move directly to the case member 18 or the seal member 26 but moves directly to the cover member 16. As a result, the heater 30 can raise the temperature of the cover member 16 to a temperature at which dew condensation can be suppressed with less power.

Further, instead of the single annular heater 30 shown in FIG. 5, a plurality of rectangular heaters 30 may be attached to the cover member 16 so as to surround the light transmitting portion 16a.

Furthermore, the heater 30 may be formed of a transparent electrode pattern that can transmit the projection light L from the projector 12, and the transparent electrode pattern may be formed on the entire cover member 16 including the light transmission portion 16a.

As described above, according to the first embodiment, a good image P can be projected when the image P is projected from the outdoor onto the hot and humid bathroom 100. That is, the bathroom 100 is connected through the cover member 16 in which the generation of condensation and the adhesion of dust and the like are suppressed from the emission part 12a to which the water droplets of the projector 12 arranged on the back side of the ceiling material 102 are not attached. A good image P is projected on the front side portion of the wall material 104.

(Embodiment 2)
In the second embodiment, condensation that occurs on the cover member is suppressed by a method different from that of the first embodiment. This Embodiment 2 is demonstrated centering on the component for that. In addition, the same code | symbol is attached | subjected to the component of this Embodiment 2 substantially the same as the component of above-mentioned Embodiment 1. FIG.

6 and 7 are perspective views as seen from different directions, and schematically show an image projection system 210 according to the second embodiment arranged on the back side of the ceiling material 102 of the bathroom 100. FIG. FIG. 8 shows a cross section of the image projection system 210 along the line CC shown in FIG. Furthermore, FIG. 9 is a top sectional view showing the internal configuration of the image projection system 210.

As shown in FIG. 8, the image projection system 210 includes a projector 12 that emits projection light L toward the wall material 104 of the bathroom 100 (projects the image P), and a projector for attaching the projector 12 to the ceiling material 102. The mounting member 214 includes a cover member 216 that closes the opening 102 a of the ceiling member 102, and a case member 218 that covers the cover member 216.

In the case of the second embodiment, as shown in FIG. 8, the projector mounting member 214 is a box-shaped member with a lid that can accommodate the projector 12 in its internal space 214a. In the case of the second embodiment, the projector mounting member 214 is also made of a non-flammable material or a flame retardant material.

“Non-combustible material” as used herein refers to a material that does not ignite and is, for example, a metal material such as an aluminum material or a stainless steel material. “Flame retardant material” refers to a material that is difficult to ignite and has a very slow combustion rate even when ignited, such as a flame retardant plastic material.

The projector mounting member 214 includes a lid-shaped top plate portion 220 that supports the projector 12 in a suspended manner, and a base portion 222 that has an upper opening through which the projector 12 passes and supports the top plate portion 220.

Further, the base portion 222 of the projector mounting member 214 includes a through hole 222a through which the emitting portion 12a of the projector 12 that emits the projection light L passes.

A cover member 216 that closes the opening 102a of the ceiling material 102 is provided in order to suppress the adhesion of water droplets to the outer surface of the projector 12 and to suppress the intrusion of moisture into the projector 12. When a large amount of moisture enters the projector 12, a short circuit may occur in an internal electric circuit, etc., as will be described in detail later.

The cover member 216 is made of a glass material or a resin material so that the projection light L emitted from the emission portion 12a of the projector 12 is transmitted.

According to such a cover member 216, the movement of moisture from the bathroom 100 to the back side of the ceiling material 102 is suppressed. Thereby, adhesion of water droplets to the outer surface of the projector 12 is suppressed. Further, moisture intrusion into the projector 12 is suppressed.

Moreover, in order to suppress the occurrence of dew condensation on the bathroom inner surface 216a of the cover member 216 and to suppress the adhesion of dust and the like to the bathroom outer surface 216b of the cover member 216, as in the first embodiment described above, A case member 218 that covers the cover member 216 is disposed on the back side of the ceiling material 102.

In the case of the second embodiment, the case member 218 is made of a non-flammable material or a flame retardant material, like the projector mounting member 214.

Specifically, the case member 218 is configured and arranged so as to cover the cover member 216 and the emission part 12a of the projector 12, as shown in FIGS. Further, as shown in FIG. 8, the case member 218 has an internal space where the projection light L from the emitting portion 12 a of the projector 12 toward the opening 102 a of the ceiling material 102 passes and is substantially isolated from the back space of the ceiling material 102. A space 218a is formed. In other words, the bathroom outer surface 216 b of the cover member 216 and the emission part 12 a of the projector 12 face the internal space 218 a of the case member 218.

According to such a case member 218, first, adhesion of dust or the like to the bathroom outer surface 216b of the cover member 216 is suppressed as compared with the case without the case member 218.

Further, the internal space 218a of the case member 218 is not only spatially isolated from the back space of the ceiling material 102 but also thermally isolated. The image projection system 210 according to the second embodiment is configured to suppress the occurrence of condensation on the bathroom inner surface 216a of the cover member 216 by warming the internal space 218a of the thermally isolated case member 218. It is configured.

Specifically, as shown in FIGS. 6 and 7, the image projection system 210 supplies exhaust from the projector 12 housed in the projector mounting member 214 into the internal space 218 a of the case member 218. A duct member 230 is provided.

FIG. 9 is a top cross-sectional view showing the internal configuration of the image projection system 210, showing the flow of air in the image projection system 210. In the figure, the air flow is indicated by white arrows.

Before describing the duct member 230 that supplies the exhaust from the projector 12 to the internal space 218a of the case member 218, the projector 12 will be briefly described.

As shown in FIG. 9, the projector 12 houses an optical system 12c for projecting an image in its housing 12b. The optical system 12c includes, for example, a light source 12d, a plurality of mirrors 12e, a plurality of dichroic mirrors 12f, a dichroic prism 12g, and a plurality of transmissive liquid crystal panels 12h. A control device 12j that controls the light source 12d and the transmissive liquid crystal panel 12h is mounted in the housing 12b. The control device 12j is configured by, for example, a CPU, a memory, a circuit, and the like mounted on a substrate.

During use, the internal temperature of the casing 12b of the projector 12 rises with the passage of time due to heat generated from the light source 12d, the control device 12j, and the like. In order to suppress the temperature rise, in the case of the second embodiment, the housing 12b has an intake port 12k for taking outside air into the inside, and first and second for discharging the inside air to the outside.

Second exhaust ports

12m and 12n are provided (see FIGS. 10 and 11 which are schematic perspective views of the projector 12). Further, a temperature sensor 12p that detects the temperature in the housing 12b is provided in the housing 12b. The temperature detected by the temperature sensor 12p is transmitted as a signal to the control device 12j.

As shown in FIG. 9, the intake port 12k and the first and

second exhaust ports

12m and 12n are formed in the casing 12b so as to face the width direction (X-axis direction) of the casing 12b of the projector 12. Has been.

In the case of the second embodiment, as shown in FIG. 9, the projector 12 is disposed in the casing 12 b of the projector 12 so as to face the first exhaust port 12 m, and the air in the casing 12 b is evacuated to the first. An internal fan 12q that blows air to the outside through the exhaust port 12m is provided. The internal fan 12q is controlled by the control device 12j and rotates at a rotational speed based on the temperature detected by the temperature sensor 12p. Alternatively, the internal fan 12q may continue to rotate at a constant rotation speed while the projector 12 is in operation. By such an internal fan 12q, the inside of the projector 12 is cooled, and the inside of the projector 12 is ventilated to prevent moisture from staying.

Such a projector 12 is accommodated in a projector mounting member 214 of the image projection system 10 as shown in FIG. The projector mounting member 214 includes a plurality of air intake ports 222b so that the accommodated projector 12 can suck air outside the projector mounting member 214.

Specifically, as shown in FIG. 7, the plurality of air intake ports 222 b are formed in the base portion 222 of the projector mounting member 214. Further, as shown in FIG. 9, the air intake port 222 b communicates between the internal space 214 a of the projector mounting member 214 and the outside, and faces the air intake port 12 k of the projector 12.

As shown in FIG. 5, it is preferable that the air intake port 222b of the projector mounting member 214 facing each other and the air intake port 12k of the projector 12 be as close as possible. As a result, the air in the projector mounting member 214 heated by the heat generated by the projector 12 is suppressed from flowing into the projector 12 through the air intake port of the projector 12. That is, the relatively low temperature external air F1 flows into the projector 12 more than the relatively high temperature air in the projector mounting member 214.

As shown in FIG. 9, the air flowing into the projector 12 through the air inlet 12k cools the optical system 12c and the control device 12j. In the case of the second embodiment, most of the high-temperature air after cooling (air F2) is discharged to the outside of the casing 12b of the projector 12 through the first exhaust port 12m by the internal fan 12q. The rest (air F3) is discharged into the internal space 214a of the projector mounting member 214 via the second exhaust port 12n.

As shown in FIG. 9, the high-temperature air F2 discharged through the first exhaust port 12m flows into the internal space 230a of the duct member 230. The duct member 230 communicates the first exhaust port 12m of the projector 12 and the internal space 218a of the case member 218 via the internal space 230a. For this reason, a part of the duct member 230 enters the internal space 214 a of the projector mounting member 214. Thereby, the high-temperature air F <b> 2 that has flowed into the internal space 230 a of the duct member 230 is supplied to the internal space 218 a of the case member 218.

The air in the internal space 218a of the case member 218 is warmed by the high-temperature air F2 flowing into the internal space 218a of the case member 218. As a result, the temperature difference between the bathroom 100 and the internal space 218 a of the case member 218 becomes smaller than when the exhaust from the projector 12 is not supplied into the case member 218. That is, the temperature difference between the bathroom inner surface 216a and the bathroom outer surface 216b of the cover member 216 is reduced. As a result, the occurrence of condensation on the inner surface 216a of the bathroom of the cover member 216 is suppressed.

The air F2 'after warming the internal space 218a of the case member 218 is discharged to the outside through an outlet 218b formed in the case member 218.

With such a configuration, it is possible to suppress the occurrence of condensation on the bathroom inner surface 216a of the cover member 216 and to suppress the adhesion of dust and the like to the bathroom outer surface 216b of the cover member 216. In addition, the interior of the image projection system 210 can be sufficiently ventilated, and moisture can be prevented from remaining inside the image projection system 210 (including the interior of the projector 12). As a result, it is possible to sufficiently take measures against a short circuit due to moisture such as an electric circuit on the control board 12j of the projector 12.

In order to further suppress the occurrence of this dew condensation and adhesion of dust and the like, and to further suppress a short circuit due to moisture, the image projection system 210 of the second embodiment includes the following configuration.

First, as shown in FIG. 9, dust or the like accompanies the air flow (the flow shown by the white arrow) that passes through the projector mounting member 214 (that is, the projector 12), the duct member 230, and the case member 218 in this order. There is a possibility of entering the internal space 218a of the 218. In order to suppress the intrusion, a filter 232 that captures dust and the like is provided at the inlet 230 b of the duct member 230. The filter 232 is provided so as to cover the entire inlet 230 b of the duct member 230. Thereby, the air F2 flowing out from the first exhaust port 12m of the projector 12 passes through the filter 232 and flows into the internal space 230a of the duct member 230. As a result, dust or the like accompanying the air F2 is captured by the filter 232, and entry of dust or the like into the internal space 218a of the case member 218 is suppressed.

Note that the filter 232 may be provided at the outlet 230 c of the duct member 230 instead of the inlet 230 b of the duct member 230. Alternatively, a filter 232 may be provided at the inlet 218 c of the case member 218 connected to the outlet 230 c of the duct member 230.

Similarly, as shown in FIG. 9, a filter 234 that covers the entirety of the outlet 218 b of the case member 218 is also provided. Thereby, intrusion of dust or the like (especially insects) into the internal space 218a of the case member 218 via the outlet 218b is suppressed while the image projection system 210 is stopped.

Such filters

232 and 234 further suppress entry of dust and the like into the internal space 218a of the case member 218.

In order to further suppress the condensation of the cover member 216, a seal member 236 is provided between the edge of the inlet 230b of the duct member 230 and the edge of the first exhaust port 12m of the projector 12, as shown in FIG. Has been placed. The seal member 236 is an annular member such as silicon rubber. The seal member 236 suppresses the high-temperature exhaust (air F2) of the projector 12 from the first exhaust port 12m of the projector 12 toward the inlet 230b of the duct member 230 from leaking into the internal space 214a of the projector mounting member 214. is doing. Accordingly, the high-temperature air F2 from the projector 12 is supplied to the internal space 218a of the case member 218 through the duct member 230 without waste. As a result, the condensation of the cover member 216 can be further suppressed (compared to the case where the seal member 236 is not provided).

Note that the sealing member 236 suppresses the high-temperature air F2 flowing out from the first exhaust port 12m of the projector 12 from returning to the intake port 12k of the projector 12 via the internal space 214a of the projector mounting member 214. . When the high-temperature air F2 flowing out from the first exhaust port 12m of the projector 12 is taken into the housing 12b again through the intake port 12k, the optical system 12c and the control device 12j in the housing 12b are sufficiently cooled. Can not. That is, the seal member 236 also plays a role of maintaining the cooling performance of the projector 12. In addition, the humidity and heat exhausted from the first exhaust port 12m of the projector 12 are also prevented from returning to the projector 12 again. As a result, the humidity and temperature in the projector 12 are kept low.

As shown in FIG. 9, a seal member 238 similar to the seal member 236 is provided between the edge of the outlet 230c of the duct member 230 and the edge of the inlet 218c of the case member 218. The sealing member 238 suppresses the high-temperature air F2 from the outlet 230c of the duct member 230 toward the inlet 218c of the case member 218 from leaking to the outside (the space behind the ceiling member 102). As a result, high-temperature air F2 from the projector 212 via the duct member 230 is supplied to the internal space 218a of the case member 218 without waste. As a result, the condensation of the cover member 216 can be further suppressed (compared to the case where the seal member 238 is not provided).

As for the sealing member, the air in the case member 218 does not enter the internal space 214a of the projector mounting member 214 through the through hole 222a of the projector mounting member 214 (the hole through which the light emitting portion 12a of the projector 12 passes). Thus, a seal member 240 is provided. The seal member 240 is provided between the edge portion of the through hole 222 a of the base portion 222 of the projector mounting member 214 and the housing 12 b of the projector 12.

The sealing member 240 suppresses air from looping repeatedly through the internal space 214a of the projector mounting member 214, the internal space 230a of the duct member 230, and the internal space 218a of the case member 218. When such an air loop occurs, the temperature of the internal space 214a of the projector mounting member 214 increases with time, and the projector 12 accommodated therein may not be sufficiently cooled. Further, since the humidity is also looped along with the air loop, the projector 12 in the projector mounting member 214 may be maintained in a high humidity state.

Further, as shown in FIGS. 6 to 8, an annular seal member 242 is also provided between the case member 218 and the back side portion 102c of the ceiling member 102. The seal member 242 suppresses the air F2 in the case member 218 from leaking to the outside (the space behind the ceiling member 102) from the gap between the case member 218 and the ceiling member 102. As a result, the condensation of the cover member 216 can be further suppressed (compared to the case where the seal member 242 is not provided).

Furthermore, as shown in FIGS. 8 and 9, the case member 218 has a black heat insulating material 244 such as polystyrene foam attached to the inner surface (the surface facing the internal space 218a). Thereby, the temperature fall of the internal space 218a of the case member 218 can be suppressed. As a result, the condensation of the cover member 216 can be further suppressed (compared to the case without the heat insulating material 244). It should be noted that a similar heat insulating material may be provided on the inner surface of the duct member 230 so that the temperature of the air F2 moving in the internal space 230a of the duct member 230 does not decrease.

Furthermore, as shown in FIG. 9, the projector 12 is accommodated in the internal space 214 a of the projector mounting member 214. Therefore, the temperature in the internal space 214 a of the projector mounting member 214 increases with the operation time of the projector 12 due to heat generated from the projector 12. There is a possibility that the projector 12 cannot be sufficiently cooled by the internal fan 12q due to the temperature rise of the internal space 214a of the projector mounting member 214. That is, the internal space 214a of the projector mounting member 214 and the interior of the projector 12 can be in a hot and humid state.

As a countermeasure, as shown in FIGS. 6 and 9, an external fan 246 is connected to the projector mounting member 214 in order to exhaust the high temperature air in the internal space 214 a of the projector mounting member 214 and to exhaust the moisture together with the hot air. Is provided. As shown in FIG. 9, an air outlet 222 c that connects the internal space 214 a and the outside is formed in the base portion 222 of the projector mounting member 214. An external fan 246 is provided on the projector mounting member 214 so as to face the air outlet 222c. While the projector 12 is in operation, the external fan 246 rotates to blow the air in the internal space 214a of the projector mounting member 214 to the outside, so that the temperature of the projector mounting member 214 is maintained at a low temperature.

In the case of the second embodiment, the ON / OFF control of the external fan 246 is executed based on the temperature of the projector 12. For example, the control device 12j externally controls the external fan 246 based on the temperature detection result of the temperature sensor 12p mounted on the projector 12. The control device 12j continues to drive the external fan 246 while the temperature sensor 12p detects a temperature exceeding a predetermined temperature. Note that the rotational speed of the external fan 246 may be changed in accordance with a change in the temperature detected by the temperature sensor 12p. Thereby, the temperature rise in the projector mounting member 214 can be efficiently suppressed, and the projector 12 is sufficiently cooled by the internal fan 12q.

As shown in FIG. 9, in the case of the second embodiment, the air (air F1) taken into the internal space 214a of the projector mounting member 214 from the air intake port 222b makes a U-turn and exits from the outlet 218b of the case member 218. It is discharged outside (air F2 '). That is, both the air intake port 222b and the outlet 218b are provided on one side in the width direction (X-axis direction) of the image projection system 210. Therefore, there is a possibility that the high-temperature air F <b> 2 ′ that has been warmed by the projector 12 and exits to the outside from the outlet 218 b is again taken into the projector mounting member 214 through the air intake port 222 b. As a result, the moisture once discharged may be taken into the projector mounting member 214 again.

As a countermeasure, in the case of the second embodiment, the air intake port 222b and the outlet 218b are provided so as to be shifted in the width direction (X-axis direction) of the image projection system 210. In particular, an outlet 218b is provided on the upstream side of the air F1 flowing into the air intake port 222b and away from the air intake port 222b. As a result, compared to the case where the air intake port 222b and the outlet 218b are aligned in the depth direction (Y-axis direction) without shifting in the width direction, the air intake port 222b is located downstream of the air F2 ′ flowing out from the outlet 218b. Compared with the case where it exists, it is suppressed that the air F2 ′ and moisture flowing out from the outlet 218b are again taken into the projector mounting member 214 through the air intake port 222b.

In addition, as shown in FIG. 8, the projector 12 is suspended and supported by the top plate portion 220 in the internal space 214 a of the projector mounting member 214. Therefore, it is away from the lower part of the internal space 214a of the projector mounting member 214 where moisture tends to stay. As a result, moisture is unlikely to enter the projector 12.

As described above, according to the second embodiment, a good image P can be projected when the image P is projected onto the hot and humid bathroom 100 from the outside. That is, the bathroom 100 via the cover member 216 in which the occurrence of condensation and the adhesion of dust and the like are suppressed from the emission part 12a to which the water droplets of the projector 12 arranged on the back side of the ceiling material 102 are not attached. A good image P is projected on the front side portion of the wall material 104.

As described above, the image projection system 210 according to the second embodiment has various configurations for suppressing moisture from remaining in the projector 12. Thereby, a short circuit due to moisture such as an electric circuit on the control board 12j of the projector 12 is suppressed. In addition, the image projection system 210 has a configuration for suppressing ignition due to a short circuit.

Specifically, as described above, the projector mounting member 214 is made of a non-flammable material or a flame-retardant material in order to take measures against ignition due to a short circuit. By being housed in the projector mounting member 214, even if the projector 12 ignites due to a short circuit, the spread of fire is suppressed.

In the case of the second embodiment, the case member 218 is also made of a non-flammable material or a flame retardant material, similarly to the projector mounting member 214. This is because, as shown in FIG. 8, there is a possibility that the spread of fire spreads in the internal space 218 a of the case member 218 through the through hole 222 a of the projector mounting member 214 through which the emission part 12 a of the projector 12 passes. Even if the fire spreads in the internal space 218a, the case member 218 prevents further fire spread.

With such a configuration, when the image P is projected onto the hot and humid bathroom 100 from the projector 12 installed outside the room, sufficient measures are taken to prevent short circuit due to moisture in the projector 12 and ignition due to the short circuit. 12 can be installed.

Note that the projector mounting member 214 and the case member 218 are both separate members made of a non-flammable material or a flame-retardant material. Alternatively, the projector mounting member 214 and the case member 218 may be integrated as one component. In this case, compared with the case where these members are separate members, the ability to suppress the spread of fire is improved. That is, in the case of separate members, there is a possibility that one member that is relatively easy to burn is intensively ignited earlier by ignition and the other is hardly damaged, but the spread of fire spreads outside. On the other hand, when it is integrated as one component, the projector mounting member 214 and the case member 218 are damaged at substantially the same speed, so it takes time until the fire spread spreads outside. That is, the spread of fire can be further suppressed.

As mentioned above, although the present invention has been described with reference to the above-described embodiment, the present invention is not limited to the above-described embodiment.

For example, in the case of the above-described first embodiment, as shown in FIG. 4, the heater 30 faces the seal member 24 via the cover member 16 (opposites in the vertical direction (Z-axis direction)). . In this case, depending on the types of the cover member 16 and the seal member 24, much of the heat transferred from the heater 30 to the cover member 16 may move to the seal member 24. As a result, it takes time for the cover member 16 to rise to a temperature at which condensation can be suppressed, and the heater 30 may consume a large amount of power.

FIG. 12 shows a part of an image projection system 210 according to another embodiment that deals with the movement of heat from the heater to the sealing member. In FIG. 12, the same components as those of the first embodiment are denoted by the same reference numerals.

In the image projection system 310 according to another embodiment shown in FIG. 12, the seal member 324 and the heater 30 that seal between the cover member 16 and the ceiling material 102 are not opposed to each other with the cover member 16 interposed therebetween. That is, the air layer R between the cover member 16 and the ceiling member 102 faces the heater 30 with the cover member 16 interposed therebetween.

Therefore, less heat is transferred from the heater 30 to the seal member 24 via the cover member 16 than when the heater 30 faces the seal member 24 across the cover member 16. As a result, the heater 30 can quickly raise the temperature of the cover member 16 to a temperature at which the occurrence of condensation can be suppressed with a small amount of electric power.

Further, for example, in the case of the above-described first embodiment, the case member 18 covers the cover member 16 in a state of being placed on the cover member 16 as shown in FIG. That is, a part of the cover member 16 is exposed in the back space of the ceiling material 102 (excluding the internal space 18a of the case member 18).

Alternatively, the case member 418 may be configured to cover the entire cover member 16 as shown in FIG. 13 showing a part of an image projection system 410 according to another embodiment. In FIG. 13, the same components as those in the above-described embodiment are denoted by the same reference numerals.

In this case, as shown in FIG. 13, the case member 418 is attached not to the cover member 16 but to the back side portion 102c of the ceiling material 102 via a seal member 426.

Furthermore, in the case of the above-described first and second embodiments, as shown in FIGS. 3 and 8, the projector mounting member 14 (214), the cover member 16 (216), and the case member 18 (218) are separate bodies. However, at least two of these may be integrated as one piece. In this case, a seal member disposed between them can be omitted.

Furthermore, in the first and second embodiments described above, as shown in FIGS. 3 and 8, the cover member 16 (216) is attached to the back side portion 102c of the ceiling material 102. The cover member may be attached to the front side portion of the ceiling material 102 facing the bathroom 100.

In addition, in the case of the above-described second embodiment, as shown in FIG. 9, the flow of the air F2 from the internal space 230a of the duct member 230 into the internal space 218a of the case member 218 is caused by the internal fan 12q of the projector 12. appear. Instead of or in addition to the internal fan 12q, a further fan may be provided, for example, between the duct member 230 and the case member 218 or at the outlet 218b of the case member 218.

With respect to the fan, as shown in FIG. 9, in order to increase the flow rate of air F1 from the outside toward the internal space 214a of the projector mounting member 214, in addition to or instead of the external fan 246, an additional fan is connected to the projector mounting member. The air intake port 222b of 214 may be provided.

Further, the external fan 246 can be omitted. For example, when the volume of the internal space 214a of the projector mounting member 214 is sufficiently larger than the volume of the projector 12, or when the projector mounting member 214 is made of a material with high heat dissipation (for example, aluminum material), the external fan 246 can be omitted.

The external fan 246 is ON / OFF controlled based on the temperature detection result of the temperature sensor 12p that detects the temperature of the projector 12 in the case of the second embodiment. Alternatively, the external fan 246 may always be driven while the projector 12 is operating.

In addition, in the case of the above-described first and second embodiments, as shown in FIGS. 3 and 8, the projection light L emitted from the emission part 12a of the projector 12 passes through the opening 102a of the ceiling material 102 ( It passes through the cover member 16 (216) and goes into the bathroom 100. However, the embodiment of the present invention is not limited to this. For example, the projection light emitted from a projector disposed on the back side of the ceiling may be reflected by a mirror disposed on the back side of the ceiling, and the reflected light may be directed into the bathroom. In this case, the mirror is disposed in the internal space of the case member.

In addition, a phosphorescent layer may be provided on at least a part of the inner surface of the case member in the image projection system. As shown in FIG. 1, when the projector of the image projection system projects an image into the bathroom, the lighting in the bathroom is turned off. In this state, when the projector stops projection due to a user operation or failure, the interior of the bathroom becomes dark. Therefore, even if the projector stops projecting, the phosphorescent layer is provided on at least a part of the inner surface of the case member so that the user can safely exit the bathroom.

The phosphorescent layer is, for example, a phosphorescent paint or a phosphorescent sheet, and stores a part of the projection light while the projector is projecting. For example, the phosphorescent layer stores a part of the projection light that directly reaches the inner surface of the case member from the projector, or a part of the projection light that is emitted from the projector and reflected by the cover member into the case member. When the projector stops projection while the light storage layer stores light, the light storage layer emits light, and part of the light leaks into the bathroom through the cover member. As a result, the user can safely exit the bathroom using the light from the phosphorescent layer.

In the case of the above-described first and second embodiments, as shown in FIGS. 3, 8, and 9, the projector 12 is housed in the projector mounting member 14 (214) and the projector mounting member 14 is accommodated. It is installed in the back side part 102c of the ceiling material 102 of the bathroom 100 via (214). However, the present embodiment is not limited to this.

In the case of the above-described first and second embodiments, the image projection system is disposed on the back side of the ceiling material of the bathroom, but the embodiment of the present invention is not limited to this. Instead of the back side of the ceiling material, the image projection system may be arranged on the back side of the wall material. In this case, the wall member includes an opening through which the projection light of the projector of the image projection system passes.

Furthermore, in the case of the above-described first and second embodiments, the image projection system projects an image into the bathroom. In other words, the above-described embodiment is a bathroom that can project an image. The form of is not limited to this.

In the case of the above-described first embodiment, the internal space of the case member is warmed by the photothermal conversion surface and the heater, while in the case of the above-described second embodiment, the internal space of the case member is heated by the exhaust of the projector. Yes. However, the embodiment of the present invention is not limited to this. That is, the case member itself can warm the internal space of the case member. For example, by making the case member from a material with excellent heat insulation or making it thick, the internal space of the case member is heated to a higher temperature than the back space of the ceiling material (excluding the internal space of the case member). Heated by the transfer of heat from. That is, since it is smaller than the back space of the ceiling material and is isolated from the back space of the ceiling material, the internal space of the case member is hotter than the back space of the ceiling material. As a result, as compared with the case without the case member, condensation is less likely to occur on the inner surface of the cover member covered with the case member when the case member is provided.

Therefore, in a broad sense, the embodiment according to the present invention is arranged on the back side of a ceiling material or wall material that defines an indoor space, and projects light into the room through an opening provided in the ceiling material or wall material. A projector having an emission part that emits light, a cover member that closes the opening of the ceiling material or wall material, covers the projection light of the projector, covers the emission part and the cover member of the projector, and opens from the emission part of the projector And a case member that forms an internal space through which projection light traveling toward the screen passes.

As described above, the embodiment has been described as an example of the technique in the present invention. For this purpose, the accompanying drawings and detailed description are provided. Accordingly, among the components described in the accompanying drawings and the detailed description, not only the components essential for solving the problem, but also the components not essential for solving the problem in order to illustrate the technology. May also be included. Therefore, it should not be immediately recognized that these non-essential components are essential as those non-essential components are described in the accompanying drawings and detailed description.

In addition, since the above-described embodiment is for illustrating the technology in the present invention, various modifications, replacements, additions, omissions, and the like can be made within the scope of the claims and the equivalents thereof.

Claims

A projector provided on the back side of a ceiling material or wall material that defines an indoor space, and having an emission part that emits projection light into the room through an opening provided in the ceiling material or wall material;
A cover member that closes the opening of the ceiling material or wall material and transmits the projection light of the projector;
An image projection system comprising: a case member that covers an emission part and a cover member of the projector and forms an internal space through which projection light directed from the emission part of the projector toward the opening passes.
The image projection system according to claim 1, wherein the case member includes a photothermal conversion surface for converting light of the projector into heat on the inner surface.
3. The image projection system according to claim 2, wherein a photothermal conversion surface is disposed on an inner surface portion of the case member that is a part of the projection light of the projector and that receives the reflected light reflected by the cover member.
4. The image projection system according to claim 2, wherein the photothermal conversion surface is a mat surface.
The image projection system according to any one of claims 2 to 4, wherein the photothermal conversion surface is black.
The image projection system according to any one of claims 2 to 5, wherein the bathroom outer surface of the cover member on which the projection light of the projector is incident has a smooth surface.
The image projection system according to any one of claims 2 to 6, further comprising a heater attached to the cover member so as to be covered by the case member and heating the cover member.
The cover member is attached to the back side portion of the ceiling material or the back side portion of the wall material via the heat insulating member,
The image projection system according to claim 7, wherein the heater is attached to the cover member so as not to face the heat insulating member across the cover member.
The projector has an intake port for taking outside air into the interior and an exhaust port for exhausting the internal air to the outside. The projector exhaust port is connected to the internal space of the case member, and exhaust from the projector The image projection system according to claim 1, further comprising: a duct member that supplies the air to the internal space of the case member.
The image projection system according to claim 9, wherein the projector includes an internal fan that is provided inside so as to face an exhaust port that communicates with an internal space of the duct member and blows air inside the projector to the outside.
The image projection system according to claim 9 or 10, wherein a filter is provided at an inlet of the duct member.
The case member has an outlet for communicating the internal space with the outside and discharging the exhaust of the projector supplied via the duct member to the outside.
The image projection system according to claim 9, wherein a filter is provided at an outlet of the case member.
The image projection system according to any one of claims 9 to 12, wherein a seal member is disposed between an edge portion of the inlet of the duct member and an edge portion of the exhaust port of the projector.
A projector mounting member that can be mounted on the back side of a ceiling material or wall material by accommodating the projector in a state where the emission part is exposed to the outside,
The projector mounting member includes an air intake port that communicates between the internal space and the outside and is provided at a portion facing the air intake port of the projector housed in the internal space. The image projection system described.
The projector mounting member has an air outlet that communicates between the interior space and the outside.
The image projection system according to claim 14, further comprising an external fan that is provided on the projector mounting member so as to face the air outlet and blows air inside the projector mounting member to the outside.
A temperature sensor that detects the temperature of the projector;
A control device for controlling the external fan based on the temperature detection result of the temperature sensor,
The image projection system according to claim 15, wherein the controller continues to drive the external fan while the temperature sensor detects a temperature exceeding a predetermined temperature.
The image projection system according to any one of claims 14 to 16, wherein the projector mounting member is made of a noncombustible material or a flame retardant material.
The image projection system according to claim 17, wherein the case member is made of a noncombustible material or a flame retardant material.
The image projection system according to claim 18, wherein the projector mounting member and the case member are integrated as one component.
The image projection system according to any one of claims 14 to 19, wherein the projector is housed in the projector mounting member in a state of being supported by being suspended from the top plate portion of the projector mounting member.
The projector mounting member is provided with a seal member that blocks air flow from the internal space of the case member to the internal space of the projector mounting member through the through hole of the projector mounting member through which the light emitting portion of the projector passes. Item 21. The image projection system according to any one of Items 14 to 20.
The image projection system according to any one of claims 1 to 21, wherein a phosphorescent layer is provided on at least a part of the inner surface of the case member.
A bathroom with an image projection system,
Image projection system
A projector provided on the back side of a ceiling material or wall material that defines an indoor space, and having an emission part that emits projection light into the room through an opening provided in the ceiling material or wall material;
A cover member that closes the opening of the ceiling material or wall material and transmits the projection light of the projector;
A bathroom having a case member that covers an emission part and a cover member of the projector and forms an internal space through which projection light traveling from the emission part of the projector toward the opening passes.