WO2016162913A1

WO2016162913A1 - Lighting device

Info

Publication number: WO2016162913A1
Application number: PCT/JP2015/060709
Authority: WO
Inventors: 一臣金子; 長平小野; 賀来　信行
Original assignee: 日立マクセル株式会社
Priority date: 2015-04-06
Filing date: 2015-04-06
Publication date: 2016-10-13

Abstract

Provided is a lighting device having excellent image projection function capable of efficiently dissipating, to the outside, heat generated from a light emitting element and a projector. This lighting device is held in a state of being suspended from a holder fixed to a ceiling surface, and emits illuminating light. The lighting device is provided with: a light source for generating the illuminating light, said light source being disposed in the housing; a diffusion plate, which is attached to a part of the housing, and which diffuses the illuminating light emitted from the light source; and a projector, which is disposed inside of a space formed by the housing and a part of the diffusion plate, and which projects an image to a projection surface. The holder is formed such that the inside thereof is hollow, and the housing is configured so as to guide, to the hollow section of the holder, the air warmed by the light source and the projector, which are disposed inside of the housing.

Description

Lighting device

The present invention relates to a lighting device.

A technique for attaching a communication function module that can be attached to a ceiling or a wall surface and can use various functions to a ceiling light is disclosed in Patent Document 1 below.

Furthermore, the following Patent Document 2 discloses an illumination device with an image projection device that enables a spatial effect combining illumination light and video.

JP 2003-16831 A JP 2012-186118 A

However, the above-described prior art only discloses a block diagram and a simple external shape of the projector, and the heat generated from the illumination light source using the semiconductor light emitting element such as the projector and the LED in the illumination apparatus is transmitted to the outside. No consideration is given to the function to release.

In general, an illuminating device having a video projection function is used by being mounted on a ceiling surface, and irradiates illumination light from a light source for illumination onto, for example, a surface of a table or the like disposed in a room, and images from a projector. Project light to the desired location. Therefore, heat generation from the projector is expected at the same time as heat generation from the illumination light source in the main body (or also referred to as a housing or shade). In particular, when the illumination and the projector are shared over a long period of time, the internal temperature rises due to the heat generated by the plurality of heat sources, reducing the light emission efficiency of the light emitting element such as an LED, or This will adversely affect the image projected from the projector. However, the above-described conventional technology has not yet paid enough consideration to the function and structure for efficiently releasing heat radiation from a plurality of heat sources in the illumination device having the image projection function. .

Therefore, the present invention has been achieved in view of the above-described problems in the prior art, and an object of the present invention is an illumination device having a video projection function in which a light emitting element and a projector are housed. An object of the present invention is to provide a practically excellent lighting device that can efficiently release heat generated from a light emitting element or a projector to the outside and can reduce adverse effects due to heat generated by a plurality of heat sources.

In order to achieve the above object, according to the present invention, there is provided an illuminating device that emits illuminating light that is held in a state of being suspended by a holder fixed to a ceiling surface, and is disposed inside a housing. A light source for generating light, a diffusion plate attached to a part of the housing, a diffusion plate for diffusing illumination light from the light source, and a space formed by a part of the housing and the diffusion plate And a projector that projects an image on a projection surface, the holder has a hollow interior, and the housing is heated by the light source and the projector disposed therein. An illuminating device is provided which is configured to guide the light into the hollow portion of the holder.

According to the present invention described above, in an illumination device having a video projection function in which a light emitting element and a projector are housed, heat generated from the light emitting element and the projector can be efficiently emitted to the outside. An excellent effect is provided in that a practically excellent lighting device capable of reducing the adverse effects of heat generated by the heat source is provided.

It is the perspective view which showed the external appearance structure of the illuminating device which has a video projection function which becomes one embodiment of this invention with the use environment. It is a figure explaining the outline of the internal structure in the illuminating device (Example 1) which has the said image | video projection function. It is a block diagram which shows the detailed circuit structure inside the said illuminating device. It is a partially expanded perspective view explaining the cooling mechanism of the illuminating device which becomes Example 1 of this invention. It is a figure explaining the outline of the internal structure in the illuminating device which becomes Example 2 of this invention. It is a partially expanded perspective view explaining the cooling mechanism of the illuminating device which becomes Example 1 of this invention. It is a figure explaining the outline of the internal structure in the illuminating device which becomes Example 3 of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, the attached FIG. 1 shows an external configuration of a lighting device with a video projection function according to an embodiment of the present invention, and in particular, in the figure, the so-called hanger is attached in a form suspended from a ceiling surface. An illumination device with a video projection function in which a video projection function is mounted on a lighting device called a pendant type is shown. However, the present invention is not limited to this, and may be applied to a so-called ceiling-type lighting device that is attached to a ceiling surface as described later.

As is apparent from this figure, the lighting device 10 with a video projection function is used by being attached to a wall, a ceiling surface 50, or the like constituting a space such as a kitchen, a dining room, a living room, or an office, for example. . More specifically, as shown also in the figure, it is integrally installed at a predetermined height or ceiling surface above a table or desk 60 installed indoors. The illumination device 10 with an image projection function projects and displays various images on the illumination function of irradiating illumination light onto the upper surface of a table or desk and the upper surface (display surface or projection surface) 61 of the table or desk 60. It is a lighting device having both a video projection function. In addition, the holder 40 in FIG. 1 is a holder for holding the pendant illumination device 10 in a state where it is suspended from the ceiling surface at a desired position, for example, a cylindrical shape made of metal such as aluminum. Shows the pipe.

A horizontal table or desk that wants to project an image with the image projection function is likely to be an object to be illuminated with the illumination function when used without using the image projection function. Therefore, it is desirable that at least a part of the area where the video is projected by the video projection function and the illumination range of the illumination light of the illumination function overlap.

Also, it is desirable that the illumination device with a video projection function is configured to be able to turn ON / OFF the illumination light emitted by the illumination function and the image projected by the video projection function by installing a control unit. In this example, the user performs this operation via the operation panel 70 attached to the wall surface.

FIG. 2 shows an outline of the internal configuration of the illumination device 10 with a video projection function shown in FIG. As is apparent from this figure, a hemispherical outlet cover 41 is attached to the upper end of a holder 40 made of a cylindrical pipe made of metal such as aluminum, and the outlet cover 41 is installed on the ceiling surface. It is fixed to the ceiling surface 50 so as to cover the outlet 51 for the lighting fixture. On the other hand, a substantially cylindrical or conical main body (or a housing or a shade) 11 formed by molding a synthetic resin, for example, is attached to the lower end of the holder 40, and the inside thereof is attached. Is configured by arranging a plurality of semiconductor light emitting elements (LEDs) 22 on the surface of a disk-shaped substrate 21 made of, for example, a metal having excellent thermal conductivity so that substantially uniform irradiation light can be obtained. In addition to the illumination light source 20, an external box-type small projector 30 for projecting and displaying various images is provided.

Moreover, the power supply unit 80 in the figure shows a power supply unit that converts a commercial AC power input through the outlet for the lighting fixture into a desired AC voltage or DC voltage. It is disposed on the upper part of the projector 30 and supplies necessary power to the illumination light source 20 and the small projector 30 described above via a wiring (not shown). In addition, the wiring 42 in a figure has shown the wiring for guiding commercial alternating current power supply from the outlet for said lighting fixtures, and the said wiring 42 is accommodated in the inside of the cylindrical pipe which is the said holder 40. FIG. ing. Moreover, the opening part 43 in the figure is an opening part formed in the upper part of the holder 40 which is the said pipe with the said outlet cover 41, and forms the vent hole so that it may demonstrate later.

Further, a diffusion plate 12 is attached so as to cover the lower opening of the main body 11, and the illumination light from the illumination light source 20 is diffused and uniformly irradiated downward. The opening 14 is an opening formed in a part of the diffusion plate 12, and an image from the small projector 30 is projected through the opening 14. Here, the outer shape of the main body (shade) 11 has been described as a cylinder or a cone. However, the present invention is not limited to this, and other shapes such as a box shape may be used. Good.

Further, the diffusion plate 12 may be provided with an opening 15 for intake. An example of the shape of the opening 15 will be described later.

Here, there is a lower flow passage opening 44 through which air in the main body 11 passes and flows when it flows into the hollow portion inside the holder 40 that is a cylindrical pipe. Then, at a position lower than the lower flow path opening 44 in the vertical direction, an exhaust port 35 for exhaust heat of a light source (for example, a mercury lamp, LED, laser light source, etc.) of the small projector 30 serving as a heat generation source, and a heat generation source The illumination light source 20 is arranged, and further, the opening 14 and the opening 15 serving as an air inlet to the space composed of the main body 11 and the diffusion plate 12 are arranged at a position lower in the vertical direction than these heat generation sources. It has become. The lower flow path opening 44 is formed at a position lower than the opening (vent hole) 43 in the vertical direction.

FIG. 3 is a block diagram showing an example of a specific circuit configuration of the above-described illumination device 10 with a video projection function. The illumination device with a video projection function 10 includes a projection type video display unit 100 (small projector 30 in FIG. 2) having a video projection function and a lighting unit 200 having an illumination light irradiation function. An operation signal input unit 301 is an operation button or a light receiving unit of a remote controller, and inputs an operation signal from a user.

Next, the configuration of the projection type video display unit 100 will be described. The projection optical system 101 is an optical system that projects an image onto an upper surface (display surface or projection surface) 61, and includes at least one of a lens and a mirror. The display element 102 is an element that generates an image by modulating transmitted light or reflected light. For example, a transmissive liquid crystal panel, a reflective liquid crystal panel, a DMD (Digital Micromirror Device: registered trademark) panel, or the like is used. The display element driving unit 103 sends a drive signal corresponding to the video signal to the display element 102. The light source 105 generates light for image projection, and uses a high-pressure mercury lamp, a xenon lamp, an LED light source, a laser light source, or the like. The power source 106 converts an AC current input from the outside into a DC current and supplies power to the light source 105. Further, the power supply 106 supplies necessary DC currents to the other components. The illumination optical system 104 condenses the light generated by the light source 105, makes it more uniform, and irradiates the display element 102 with it. The cooling unit 115 cools each part, such as the light source 105, the power source 106, or the display element 102, which is in a high temperature state, by air cooling or liquid cooling as necessary. The operation input unit 107 is an operation button or a light receiving unit of a remote controller, and inputs an operation signal from the user. The operation input unit 107 may receive an infrared signal or a radio signal from the operation panel 70 of FIG. When a signal from the operation signal input unit 301 of the illumination device 10 is input to the projection type video display unit 100, the operation input unit 107 may be omitted.

The video signal input unit 131 connects an external video output device and inputs video data. The audio signal input unit 133 inputs an audio data by connecting an external audio output device. The audio output unit 140 can perform audio output based on the audio data input to the audio signal input unit 133. Further, the audio output unit 140 may output a built-in operation sound or an error warning sound. For example, the communication unit 132 is connected to an external information processing apparatus and inputs / outputs various control signals. The communication unit 132 may perform wired communication or wireless communication with the operation panel 70 of FIG.

The nonvolatile memory 108 stores various data used for the projector function. The memory 109 stores video data to be projected and control data for the apparatus. The control unit 110 controls the operation of each connected unit.

The image adjustment unit 160 performs image processing on the video data input by the video signal input unit 131. Examples of the image processing include scaling processing for enlarging, reducing, and deforming the image, bright adjustment processing for changing the brightness, contrast adjustment processing for changing the contrast curve of the image, and components obtained by decomposing the image into light components. Retinex processing for changing the weighting for each.

The storage unit 170 records video, images, audio, various data, and the like. For example, video, image, audio, various data, etc. may be recorded in advance at the time of product shipment, and video, image, audio, various data, etc. acquired from an external device, an external server, etc. via the communication unit 132 may be used. It may be recorded. Video, images, various data, and the like recorded in the storage unit 170 may be output as projection video via the display element 102 and the projection optical system 101. The sound recorded in the storage unit 170 may be output as sound from the sound output unit 140.

As described above, the projection type image display unit 100 can be provided with various functions. However, the projection display unit 100 does not necessarily have all the above-described configurations. Any configuration may be used as long as it has a function of projecting an image.

Next, the configuration of the lighting unit 200 will be described. The control unit 201 controls each unit to be connected. The operation input unit 203 is an operation button or a light receiving unit of a remote controller, and inputs an operation signal from the user. The operation input unit 203 may receive an infrared signal or a radio signal from the operation panel 70 of FIG. When a signal from the operation signal input unit 301 of the illumination device 10 is input to the illumination unit 200, the operation input unit 203 may be omitted. The nonvolatile memory 204 stores various data used in the lighting unit 200.

The power source 202 converts an AC current input from the outside into a DC current and supplies power to the light emitting element drivers (210, 220, etc.). Further, the power source 202 supplies necessary DC currents to the other units. The light emitting element drivers (210, 220, etc.) emit light from the light emitting elements (211, 212, 213, 221, 222, 223, etc.) based on the control of the control unit 201 using the power supplied from the power source 202. The light emitting element serves as a light source of illumination light emitted from the illumination unit 200. For example, in the example of FIG. 3, the light emitting element driver A210 collectively drives n light emitting elements A1, A2,... An (211, 212, 213, etc.) connected in series. The light emitting element driver A 210 changes the luminance, color, and the like of these light emitting elements based on the control of the control unit 201. Similarly, the light emitting element driver B220 collectively drives m light emitting elements B1, B2,... Bm (221, 222, 223, etc.) connected in series. The light emitting element driver B220 changes the luminance and color of these light emitting elements based on the control of the control unit 201. With this configuration, it is possible to control the luminance and color of a plurality of light emitting elements for each light emitting element driver. In the example of FIG. 3, two examples of a light emitting element driver and a set of a plurality of light emitting elements are shown, but one or three or more sets may be used. What is necessary is just to increase / decrease as needed.

With the configuration described above, the illumination unit 200 can emit illumination light with variable brightness or color.

Subsequently, in the illumination device having the video projection function described above, the details of the illumination light source 20 and the mechanism for cooling the projector 30, which are features of the present invention, are specifically described. Examples 1 to 3 will be described below.

<Example 1>
Since the outline of the internal configuration of the first embodiment is the same as that of FIG. 2, the description thereof is omitted here, and the cooling mechanism that is a feature thereof will be described below with reference to FIG.

As shown in FIG. 4, in Example 1, the disk-shaped substrate 21 constituting the above-described illumination light source 20 is formed by forming a metal such as aluminum or copper having excellent thermal conductivity into a cylindrical shape. The semiconductor light-emitting element 22 formed of a plurality of LEDs described above is attached to the lower surface side of the figure. In addition, the bottom wall (the wall on the upper surface side of the figure) of the metal container 23 also includes an opening (center part of the figure) through which the wiring from the above-described lighting appliance outlet 51 (see FIG. 2) passes. A plurality of openings 24 are formed. In the inner space of the metal container 23, the above-described outer box-type small projector 30 is housed with the projection lens 31 facing downward, and is fixed at a predetermined position by a fixing member such as a screw 25, for example. It is fixed. Similarly, a power supply unit 80 that supplies required power to the illumination light source 20 and the small projector 30 is also fixed at a predetermined position inside the metal container 23 by a fixing member such as a screw 25.

In addition, a plurality of rod-shaped members 26 are integrally formed on the upper surface wall of the metal container 23, and as is apparent from the drawing, the tips of these rod-shaped members 26 have a conical main body (shade) 11. Is also fixed to a predetermined position by a fixing member such as a screw 25. In addition, the outer cone-shaped main body (shade) 11 is fixed to the lower end of a holder 40 made of a cylindrical pipe made of a metal such as aluminum having excellent thermal conductivity.

On the other hand, in order to diffuse the illumination light from the illumination light source 20 and uniformly irradiate it downward, it is attached so as to cover the lower opening of the main body 11 and is attached to the diffuser plate 12 from the small projector 30 at its center. Are formed, and a plurality of small-diameter openings (small-diameter openings) 15 are formed in the periphery thereof.

Here, referring back to FIG. 2 again, according to the above-described configuration, the ambient air heated by the exhaust heat of the light source flowing out from the exhaust port 35 of the small projector 30 and the heat generated from the power supply unit 80 is indicated by a bold line in the figure. As shown by the arrows, the air warmed by the bowl-shaped portion 21 which is a disk-shaped substrate of the light source 20 for illumination in the internal space of the metal container 23, and then flows into the main body (shade) 11. Move upward through the space. After that, these air flows through the upper part of the main body (shade) 11 and flows into the inside of the holder 40 which is a metal cylindrical pipe excellent in thermal conductivity from the lower flow path opening 44, so-called chimney. As a result, the pipe rises. Thereafter, it flows out through the upper part of the holder 40 that is the pipe and the vent opening 43 formed in the outlet cover 41. On the other hand, with the outflow of the air heated by the heat generation to the outside, as shown by the thin line arrows in the figure, the external air is the opening 15 or the opening 14 which is a small diameter opening formed in the diffusion plate 12. And flows into the main body (shade) 11 through a gap between the bowl-shaped portion 21 which is a disc-shaped substrate and the main body (shade) 11, and part of the main body (shade) 11 passes through the small projector 30. Move to top of (shade) 11. That is, the air inside the main body (shade) 11 can be efficiently replaced (circulated) with the external air by the convection due to the chimney effect by the cylindrical pipe 40.
That is, the opening 15 and the opening 14 which are small-diameter openings serve as intake openings into the main body (shade) 11.

That is, due to the above-described chimney effect, heat generated from the heat generating part (in this example, mainly the light source 20 for illumination, the small projector 30, and the power supply part 80) housed inside the main body (shade) 11 is By transmitting to the air flow circulating inside, it is possible to efficiently discharge to the outside and cool the heat generating portion.

In order to enhance this cooling effect, as shown in FIGS. 2 and 3, the light outlet of the light source of the small projector 30 serving as a heat generation source is positioned lower than the lower flow path opening 44 of the holder 40 in the vertical direction. 35 and an illumination light source 20 serving as a heat generation source, and further, an opening 14 serving as an air inlet to the space formed by the main body 11 and the diffusion plate 12 at a position lower in the vertical direction than these heat generation sources It is desirable to arrange the opening 15.

In the example of FIGS. 2 and 3, the opening 15 that is a small-diameter opening is provided in the diffusion plate 12, but it is not necessarily provided in the diffusion plate 12. You may provide in the side surface of the main body 11. In the example of FIGS. 2 and 3, the opening shape of the opening 15, which is a small-diameter opening, is a small diameter, but it may be an elongated slit shape.

<Example 2>
Subsequently, FIG. 5 shows an outline of the internal configuration of the second embodiment. Since the schematic configuration is the same as that of FIG. 2, the description thereof is omitted here, and the cooling mechanism that is a feature thereof is described below. This will be described with reference to FIG.

As is clear from FIG. 6, in the second embodiment, the above-described metal container 23 is extended upward and formed integrally with the lower end of the holder 40, which is a cylindrical pipe made of metal such as aluminum. Is. In addition, about the light source 20 for illumination, it is set as the disk-shaped board | substrate 21 which comprises the light source for illumination by forming the bowl-shaped part in the lower end of the metal container 23, and arrange | positioning the semiconductor light-emitting element 22 which consists of several LED. This is the same as described above.

In the second embodiment, a disk-shaped member 26 is fixed and attached to the substantially central portion of the metal container 23, and the small projector 30 and the power supply unit 80 housed in the internal space of the metal container 23 by the member 26. Is fixed at a predetermined position by a fixing member such as a screw 25. Furthermore, a plurality of elongated slit-shaped openings 27 are provided in the upper part of the metal container 23 (above the member 26), whereby the interior space of the main body (shade) 11 and the interior of the metal container 23 are provided. Air permeability between the space is secured. The main body (shade) 11 is held at a predetermined position by a protrusion 28 formed on the upper portion of the metal container 23.

The diffusion plate 12 is the same as described above in order to diffuse the illumination light from the illumination light source 20 attached so as to cover the lower opening of the main body 11 and uniformly irradiate it downward.

According to the configuration described above, returning to FIG. 5 above, the surrounding air heated by the exhaust heat of the light source flowing out from the exhaust port 35 of the small projector 30 and the heat generation of the power supply unit 80 is indicated by a bold line in the figure. As shown by the arrow, it rises in the internal space of the metal container 23. Further, the air heated by the bowl-shaped portion 21 which is a disk-shaped substrate of the illumination light source 20 moves upward from there, and passes through a plurality of slit-shaped openings 27 formed in the upper portion of the metal container 23. It flows into the internal space of the metal container 23 of FIG. After that, these air flows through the upper part of the metal container 23 and flows into the inside of the holder 40 which is a metal cylindrical pipe having excellent thermal conductivity from the lower flow path opening 44, so-called chimney effect. As a result, the inside of the pipe rises and flows out from the upper part of the holder 40 which is the pipe and the ventilation opening 43 formed in the outlet cover 41 to the outside. Then, with the outflow of the air heated by the heat generation to the outside, as shown by the thin line arrows in the figure, the outside air is formed in the opening 15 and the opening 14 which are small-diameter openings formed in the diffusion plate 12. , And then flows into the inside of the main body (shade) 11 through a gap between the bowl-shaped portion 21 which is a disk-shaped substrate and the main body (shade) 11. That is, it is possible to efficiently replace (circulate) the air inside the main body (shade) 11 with the outside air by convection due to the chimney effect by the holder 40 that is a cylindrical pipe. It is the same.

That is, the opening 15 and the opening 14 which are small-diameter openings serve as intake openings into the main body (shade) 11.

Furthermore, according to the configuration of the second embodiment, as indicated by the dashed arrows in FIG. 5, the heat generated from the semiconductor light emitting element 22 of the illumination light source 20 is generated from the bowl-shaped portion of the metal container 23 that is a disk-shaped substrate. 6 is transmitted through the wall surface of the metal container 23 in FIG. 6 to the holder 40 which is a metal cylindrical pipe excellent in thermal conductivity formed integrally therewith. Similarly, the heat generated from the small projector 30 and the power supply unit 80 is also applied to the wall surface of the metal container 23 and the metal through the disk-shaped member 26 of FIG. It is transmitted to the holder 40 which is a cylindrical pipe made of metal.

That is, according to the configuration of the second embodiment, in addition to the cooling effect due to the convection caused by the chimney effect described above, the heat generation is directed to the metal metal container 23 having excellent thermal conductivity and the holder 40 which is a cylindrical pipe. Therefore, it is possible to more efficiently realize the cooling of the heat generating portion.

Also in the second embodiment, in order to enhance this cooling effect, as shown in FIGS. 5 and 6, a small projector serving as a heat generation source at a position lower than the lower flow path opening 44 of the holder 40 in the vertical direction. 30 light source exhaust ports 35 and an illumination light source 20 serving as a heat generation source are arranged, and an air inflow port to a space formed by the main body 11 and the diffusion plate 12 at a position lower in the vertical direction than these heat generation sources. It is desirable to arrange the opening 14 and the opening 15.

In the examples of FIGS. 5 and 6, the opening 15 that is a small-diameter opening is provided in the diffusion plate 12, but it is not always necessary to provide the diffusion plate 12. You may provide in the side surface of the main body 11. In the example of FIGS. 5 and 6, the opening shape of the opening 15 that is a small-diameter opening is a small diameter, but may be a long and narrow slit shape.

Here, in general, the relationship between the intake air flow rate and the outside air temperature is expressed by the following equation.
Q = C · A · √2 g · h · (T _i −T ₀ ) / T _i
Q: Air flow rate due to the chimney effect [m ³ / s]
A: Cross-sectional area of the chimney [m ² ]
C: Flow coefficient (usually 0.65 to 0.7)
g: Weight acceleration = 9.80665 [m / s ² ]
h: Height of the chimney [m]
T ₀ : Absolute temperature of outside air [K]
T _i : Average temperature in the chimney [K]

Therefore, in order to obtain a desired cooling effect, in particular, the diameter (A: cross-sectional area [m ² ] of the chimney) and the length (h: the height of the chimney) which are metal cylindrical pipes. It is important to set [m]) appropriately. In particular, the diameter of the holder 40, which is a cylindrical pipe, will need to be set in consideration of the wiring 42 from the outlet for the lighting fixture housed therein.

<Example 3>
In this third embodiment, in addition to the configuration using the chimney effect and the heat transfer action shown in the first or second embodiment, a fan for performing forced ventilation is further employed. The configuration is shown.

As is clear from FIG. 7, in the third embodiment, in addition to the configuration shown in the first embodiment (or the configuration of the second embodiment), the holder is a metal cylindrical pipe. A small ventilation fan 45 is attached to a part (upper part) of 40 and the opening 43 of the hemispherical outlet cover 41. The ventilation fan 45 may be attached to one of the part (upper part) 46 of the holder 40 or the opening 43 of the outlet cover 41.

That is, in the third embodiment, by attaching the ventilation fan 45, the circulating air flow rate is increased, so that the heat generating portion can be cooled more efficiently. Note that the ventilation fan 45 is preferably attached at a position close to the ceiling surface 50, such as the upper part of the holder 40, which is a cylindrical pipe as described above, and the hemispherical outlet cover 41. This is because the accompanying ventilation fan 45 is arranged at a position further away from the user to obtain an effect of reducing the adverse effects of noise (silent effect).

Further, these ventilation fans 45 may be provided inside the main body (shade) 11 and turned on / off using a temperature detected by a temperature sensor, or the operation panel 70 is used. Then, the operator may control it.

As described above, various illumination devices with a video projection function according to various embodiments of the present invention have been described. However, the present invention is not limited to the above-described embodiments, and includes various modifications. For example, the above-described embodiments are described in detail for the entire system in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment. Further, it is possible to add, delete, and replace other configurations for a part of the configuration of each embodiment.

DESCRIPTION OF SYMBOLS 10 ... Illuminating device, 11 ... Main body (shade) (shade), 12 ... Diffusing plate, 14, 15 ... Opening part, 20 ... Light source for illumination, 23 ... Metal container, 30 ... Small projector, 32 ... Projection lens, 40 ... Holder, 41 ... outlet cover, 43 ... opening, 44 ... lower flow path opening, 45 ... cooling fan

Claims

An illumination device that emits illumination light that is held in a state of being suspended by a holder fixed to a ceiling surface,
A light source for generating the illumination light disposed inside the housing;
A diffusion plate attached to a part of the housing, and a diffusion plate for diffusing illumination light from the light source;
A projector that is disposed within a space formed by a part of the casing and the diffusion plate and that projects an image on a projection surface;
The holder has a hollow interior,
The said housing is comprised so that the air warmed by the said light source arrange | positioned in the inside and the said projector may be guide | induced to the hollow part of the said holder.
The lighting device according to claim 1,
The holding device is formed with an opening for communicating an internal hollow portion with the outside.
The lighting device according to claim 2,
There is a flow path opening that passes when air flows from the housing into the hollow part inside the holder at a position lower in the vertical direction than the opening part of the hollow part inside the holder,
An illuminating apparatus characterized in that an exhaust port for exhausting exhaust heat from the light source of the projector and a light source for generating the illumination light are both arranged at a position lower in the vertical direction than the flow path opening. .
The lighting device according to claim 3,
An exhaust port through which exhaust heat from the light source of the projector is exhausted and an intake opening through which air can flow into the housing is provided at a position lower in the vertical direction than the light source for generating the illumination light. Lighting device.
The lighting device according to claim 1,
The housing is further configured to transmit heat generated by at least the light source disposed therein to the holder.
In the illumination device according to any one of claims 1 to 5,
The said holding tool is formed with the member excellent in heat conductivity, The illuminating device characterized by the above-mentioned.
In the illumination device according to any one of claims 1 to 5,
A part of the casing in which the light source is arranged and a part of the casing in which the projector is arranged are formed by a member having excellent heat conductivity.
In the illuminating device according to any one of claims 1, 2, 3, and 5,
An opening for guiding air from outside to the inside of the housing is formed in a part of the diffusion plate.
The lighting device according to claim 2,
A fan for discharging internal air to the outside is attached to the opening formed in the holder.
The lighting device according to claim 9,
The opening is formed in the upper part of the holder, and the fan is attached to the lighting device.