Cooling device

Abstract

To solve such a problem that a projector may be ventilated into a space where other devices or walls are provided depending on its arrangement method.SOLUTION: A cooling device comprises: a housing that accommodates a cooling target and has a first surface and a second surface; an airflow passage that circulates air to cool the cooling target; a first ventilation port that is arranged on the first surface and allows the air circulating in the airflow passage to pass therethrough; a second ventilation port that is arranged on the second surface and allows the air circulating in the airflow passage to pass therethrough; a first connection terminal that is arranged on the first surface; a second connection terminal that is arranged on the second surface; and a detection mechanism that detects that the first connection terminal is connected to a connection object. When the detection mechanism detects that the first connection terminal is connected to the connection object, the air passes through the first ventilation port.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present disclosure relates to a cooling device. [Background technology]

[0002] Image projection devices that exhaust heat from within the device to the outside of the device are known. The projector described in Patent Document 1 has an exhaust fan, an exhaust port, and a heat exhaust direction control means. The exhaust fan exhausts air from within the projector to the outside. The exhaust port is an opening provided on the exhaust surface of the projector through which air is exhausted. The heat exhaust direction control means changes the exhaust direction of the air exhausted from the exhaust port. The heat exhaust direction control means can change the angle of the exhaust direction relative to the exhaust surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-90787 Summary of the Invention [Problem to be solved by the invention]

[0004] Depending on the installation method, the projector may ventilate a space where other devices, walls, etc. are installed. [Means for solving the problem]

[0005] The cooling device of the present disclosure comprises a housing that houses an object to be cooled and has a first surface and a second surface, an airflow path that circulates air to cool the object to be cooled, a first air vent that is arranged on the first surface and allows the air circulating in the airflow path to pass through, a second air vent that is arranged on the second surface and allows the air circulating in the airflow path to pass through, a first connection terminal that is arranged on the first surface, a second connection terminal that is arranged on the second surface, and a detection mechanism that detects that the first connection terminal has connected to a connected object, and when the detection mechanism detects that the first connection terminal has connected to the connected object, the air passes through the first air vent.

[0006] The cooling device of the present disclosure comprises a housing that houses an object to be cooled and has a first surface and a second surface; an airflow path that circulates air to cool the object to be cooled; a first air vent arranged on the first surface and through which the air circulating through the airflow path can pass; a second air vent arranged on the second surface and through which the air circulating through the airflow path can pass; a pivotable connecting member that has a connection surface and can switch the position of the connection surface between a first connection position along the first surface or a second connection position along the second surface; a connection terminal arranged on the connection surface; and a detection mechanism that detects when the connection terminal is connected to a connected object; and when the detection mechanism detects that the connection terminal is connected to the connected object and the connection surface is positioned at the first connection position, the air passes through the first air vent.

[0007] The cooling device of the present disclosure comprises a housing that houses an object to be cooled and has a first surface and a second surface, an airflow path that circulates air to cool the object to be cooled, a first connection terminal arranged on the first surface, a second connection terminal arranged on the second surface, a pivotable ventilation member that has a ventilation surface and is capable of switching the position of the ventilation surface to a first ventilation position along the first surface or a second ventilation position along the second surface, a ventilation port arranged on the ventilation surface, and a detection mechanism that detects when the first connection terminal is connected to a connected object, and when the detection mechanism detects that the first connection terminal is connected to the connected object and the ventilation surface is positioned in the first ventilation position, the air passes through the ventilation port. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 illustrates the external configuration of a projector. [Figure 2] FIG. 1 illustrates the external configuration of a projector. [Figure 3] FIG. 1 is a diagram showing a schematic configuration of an image projection device. [Figure 4] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 5] FIG. 1 illustrates the external configuration of a projector. [Figure 6] FIG. 1 illustrates the external configuration of a projector. [Figure 7] FIG. 1 illustrates the external configuration of a projector. [Figure 8] FIG. 2 is a diagram showing the block configuration of a projector. [Figure 9] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 10] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 11] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 12] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 13] FIG. 1 illustrates the external configuration of a projector. [Figure 14] FIG. 1 illustrates the external configuration of a projector. [Figure 15] FIG. 2 is a diagram showing the block configuration of a projector. [Figure 16] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 17] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 18] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 19] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 20] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 21] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 22] FIG. 1 illustrates the external configuration of a projector. [Figure 23] FIG. 1 illustrates the external configuration of a projector. [Figure 24] FIG. 2 is a diagram showing the block configuration of a projector. [Figure 25] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 26] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 27] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 28] FIG. 1 illustrates the external configuration of a projector. [Figure 29] FIG. 1 illustrates the external configuration of a projector. [Figure 30] FIG. 2 is a diagram showing the block configuration of a projector. [Figure 31] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 32] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 33] FIG. 2 is a diagram showing a schematic configuration of an exhaust unit. [Figure 34] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 35] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 36] FIG. 2 is a diagram showing a schematic configuration of a connector rotation unit. [Figure 37] FIG. 2 is a diagram showing a schematic configuration of a connector rotation unit. [Figure 38] FIG. 2 is a diagram showing the block configuration of a projector. [Figure 39] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 40] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 41] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 42] FIG. 2 is a diagram showing the block configuration of a projector. [Figure 43] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 44] FIG. 1 is a diagram showing a schematic configuration of a projector. DETAILED DESCRIPTION OF THE INVENTION

[0009] FIG. 1 shows the external configuration of a projector 10. FIG. 1 shows the external configuration of the projector 10 in a perspective view. The projector 10 corresponds to an example of a cooling device. FIG. 1 shows a perspective view of the projector 10 installed on an installation surface, as seen from the front. The projector 10 includes an exterior housing 20 and an image projection device 30.

[0010] The exterior housing 20 houses the image projection device 30. The exterior housing 20 shown in FIG. 1 is rectangular. The shape of the exterior housing 20 is not limited to a rectangle. The shape of the exterior housing 20 can be set as appropriate. The exterior housing 20 shown in FIG. 1 has an upper surface 20a, a lower surface 20b, a front surface 20c, a first side surface 20d, a rear surface 20e, and a second side surface 20f. The upper surface 20a is parallel or approximately parallel to the installation surface. The lower surface 20b is opposite the installation surface. The front surface 20c is opposite a projection surface onto which the image projection device 30 projects image light. The first side surface 20d and the second side surface 20f are adjacent to the front surface 20c and are perpendicular or approximately perpendicular to the installation surface. The rear surface 20e is adjacent to the first side surface 20d and the second side surface 20f and is perpendicular or approximately perpendicular to the installation surface. The names of the surfaces are given based on the installation posture in which the bottom surface 20b faces the installation surface, but do not indicate the up-down relationship of the surfaces. As an example, the projector 10 may be placed with the bottom surface 20b facing the +Z direction. The installation posture of the projector 10 is set appropriately. The exterior housing 20 corresponds to an example of a housing.

[0011] Several figures, including FIG. 1, illustrate an XYZ coordinate system. The Z axis is an axis perpendicular to the installation surface. The +Z direction is the direction from the bottom surface 20b to the top surface 20a. The -Z direction is the direction from the top surface 20a to the bottom surface 20b. The X axis is an axis parallel to the installation surface. The +X direction is the direction from the back surface 20e to the front surface 20c. The -X direction is the direction from the front surface 20c to the back surface 20e. The Y axis is an axis parallel to the installation surface and perpendicular to the X axis. The +Y direction is the direction from the second side surface 20f to the first side surface 20d. The -Y direction is the direction from the first side surface 20d to the second side surface 20f. The first side surface 20d is the right side when the projector 10 is viewed from the front surface 20c. The second side surface 20f is the left side when the projector 10 is viewed from the front surface 20c.

[0012] 1, an indicator 21, a part of the image projection device 30, and an air intake 40 are arranged on the front surface 20c of the projector 10. The image projection device 30 projects image light from the front surface 20c onto a projection surface. The configuration of the image projection device 30 will be described later.

[0013] The indicator 21 indicates the operating state of the projector 10. The indicator 21 is, for example, configured with a plurality of LED (Light Emitting Diode) lamps. The indicator 21 indicates that the power of the projector 10 is ON, etc.

[0014] The air intake 40 is an opening that draws air into the inside of the projector 10. As an example, the air intake 40 is made up of a plurality of slits. The configuration of the air intake 40 is not limited as long as it is a configuration that allows air to be drawn into the inside of the projector 10. The air intake 40 shown in FIG. 1 is disposed on the front surface 20c, but is not limited to this. The position where the air intake 40 is disposed can be set as appropriate. The air intake 40 corresponds to an example of a vent.

[0015] An exhaust port 50 is arranged on the first side surface 20d. The exhaust port 50 exhausts air circulating inside the projector 10. As an example, the exhaust port 50 is composed of a plurality of slits. The configuration of the exhaust port 50 is not limited as long as it is a configuration that can exhaust air inside the projector 10. In the projector 10 shown in FIG. 1, a plurality of exhaust ports 50 are arranged on the first side surface 20d. The number and arrangement positions of the exhaust ports 50 are set appropriately. The exhaust port 50 corresponds to an example of an air vent.

[0016] Fig. 2 shows the external configuration of the projector 10. Fig. 2 is a perspective view showing the external configuration of the projector 10. Fig. 2 shows a perspective view of the projector 10 installed on an installation surface, as seen from behind.

[0017] An operation panel 23 is disposed on the top surface 20a of the projector 10. The operation panel 23 accepts input operations from the user. The operation panel 23 is composed of a plurality of input buttons and the like. The operation panel 23 may also have a display. The display shows setting information and the like to the user.

[0018] An exhaust port 50, a connection unit 60, and a power supply unit 70 are arranged on the rear surface 20e of the projector 10 shown in Fig. 2. The positions of the exhaust port 50, the connection unit 60, and the power supply unit 70 are set appropriately.

[0019] 2 has a plurality of exhaust ports 50 arranged on the rear surface 20e. The number and positions of the exhaust ports 50 arranged on the rear surface 20e are set appropriately. The configuration of the exhaust ports 50 arranged on the rear surface 20e may be the same as or different from the configuration of the exhaust ports 50 arranged on the first side surface 20d.

[0020] The connection unit 60 is connected to an external device for communication. The connection unit 60 has one or more connectors 61 that connect the projector 10 to an external device. The connection unit 60 may have a wireless communication circuit that wirelessly connects to the external device. FIG. 2 shows a configuration in which a rear connection unit 60a, which is an example of the connection unit 60, is arranged on the rear surface 20e.

[0021] The connector 61 is a terminal for connecting to an external device via a wire. The connector 61 inputs image data, etc. from the external device. Alternatively, the connector 61 outputs setting data, etc. to the external device. FIG. 2 shows a plurality of connectors 61. The connectors 61 are composed of a USB (Universal Serial Bus) terminal, an HDMI (High-Definition Multimedia Interface) terminal, an optical digital cable terminal, a DisplayPort terminal, etc. Here, HDMI is a registered trademark. The type and number of connectors 61 included in the connection unit 60 are set as appropriate.

[0022] The power supply unit 70 supplies power to the projector 10. The power supply unit 70 includes a power terminal 71 that connects to a power cable 211. The power supply unit 70 may be disposed on the same surface as the connection unit 60, or may be disposed on a different surface.

[0023] FIG. 3 shows a schematic configuration of an image projection device 30. The image projection device 30 is housed in an exterior housing 20. The image projection device 30 forms image light according to image information input from an external device. The image projection device 30 enlarges and projects the image light onto a projection surface. The image projection device 30 includes a light source unit 31, a homogenizing optical system 32, a color separation optical system 33, a relay optical system 34, an image formation unit 35, an optical component housing 36, and a projection optical unit 37. The image projection device 30 corresponds to an example of an object to be cooled.

[0024] The light source unit 31 emits light to the homogenizing optical system 32. For example, the light source unit 31 includes a solid-state light source and a wavelength conversion element. The solid-state light source emits blue light, which is excitation light. The wavelength conversion element converts at least a portion of the blue light emitted from the solid-state light source into fluorescence containing green light and red light. The light source unit 31 may include a light source lamp such as an ultra-high pressure mercury lamp. The light source unit 31 may include light-emitting elements that individually emit blue light, green light, and red light.

[0025] The homogenizing optical system 32 homogenizes the light emitted from the light source unit 31. The homogenized light passes through a color separation optical system 33 and a relay optical system 34, and illuminates a modulation area of ​​the transmissive liquid crystal panel 353. The homogenizing optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324.

[0026] The first lens array 321 divides the light emitted from the light source unit 31 into a plurality of partial light beams. The first lens array 321 is made up of a plurality of first lenses. The first lenses are not shown. The plurality of first lenses are arranged in an array on one plane.

[0027] The second lens array 322 is composed of a plurality of second lenses corresponding to a plurality of first lenses. The second lenses are not shown. The plurality of second lenses are arranged in an array on one plane.

[0028] The polarization conversion element 323 converts light into linearly polarized light having a specific vibration direction. The polarization conversion element 323 converts the other linearly polarized light into one linearly polarized light. As an example, the polarization conversion element 323 converts P-polarized light into S-polarized light.

[0029] The superimposing lens 324 collects the partial light beams from the polarization conversion element 323. The superimposing lens 324 superimposes the collected partial light beams near the transmissive liquid crystal panel 353. The first lens array 321, the second lens array 322, and the superimposing lens 324 constitute an integrator optical system that makes the in-plane light intensity distribution of the light uniform.

[0030] The color separation optical system 33 separates the light incident from the homogenization optical system 32 into red light, green light, and blue light. The color separation optical system 33 includes a first dichroic mirror 331, a second dichroic mirror 332, and a first reflecting mirror 333.

[0031] The first dichroic mirror 331 separates the light into blue light and a mixture of red and green light. The first dichroic mirror 331 reflects the blue light. The first dichroic mirror 331 transmits the red and green light.

[0032] The second dichroic mirror 332 separates the mixed light of red and green light into red light and green light. The second dichroic mirror 332 reflects the green light. The second dichroic mirror 332 transmits the red light. The second dichroic mirror 332 reflects the green light toward the transmissive liquid crystal panel 353.

[0033] First reflecting mirror 333 reflects the blue light separated by first dichroic mirror 331. First reflecting mirror 333 is disposed in the optical path of the blue light. First reflecting mirror 333 reflects the blue light toward transmissive liquid crystal panel 353.

[0034] The relay optical system 34 is provided in the optical path of the red light. The optical path of the red light is longer than the optical paths of the blue light and the green light. The relay optical system 34 suppresses loss of the red light. The relay optical system 34 includes an incident-side lens 341, a second reflecting mirror 342, a relay lens 343, and a third reflecting mirror 344.

[0035] Incident-side lens 341 prevents optical loss of the red light. Incident-side lens 341 passes the red light transmitted by second dichroic mirror 332. Incident-side lens 341 is provided between second dichroic mirror 332 and second reflecting mirror 342.

[0036] Second reflecting mirror 342 reflects the red light that has passed through incident-side lens 341. Second reflecting mirror 342 reflects the red light toward relay lens 343. Second reflecting mirror 342 is provided between incident-side lens 341 and relay lens 343 on the optical path of the red light.

[0037] Relay lens 343 prevents optical loss of the red light. Relay lens 343 passes the red light reflected by second reflecting mirror 342. Relay lens 343 is provided between second reflecting mirror 342 and third reflecting mirror 344.

[0038] Third reflecting mirror 344 reflects the red light that has passed through relay lens 343. Third reflecting mirror 344 reflects the red light toward transmissive liquid crystal panel 353. Third reflecting mirror 344 is provided between relay lens 343 and transmissive liquid crystal panel 353 on the optical path of the red light.

[0039] The relay optical system 34 shown in Fig. 3 is provided on the optical path of the red light and guides the red light. The relay optical system 34 is not limited to the configuration shown in Fig. 3. The image projection device 30 may be configured such that the optical path of the blue light is longer than the optical paths of the red light and the green light. In this case, the relay optical system 34 may be configured to guide the blue light.

[0040] The image forming unit 35 modulates red light, green light, and blue light. The image forming unit 35 forms image light by combining the modulated red light, green light, and blue light. The image forming unit 35 has three field lenses 351, three incident-side polarizing plates 352, three transmissive liquid crystal panels 353, three exit-side polarizing plates 354, one color combining optical system 355, and a light path shift module 356. The three field lenses 351, the three incident-side polarizing plates 352, and the three transmissive liquid crystal panels 353 are provided corresponding to the incident red light, green light, and blue light, respectively.

[0041] The field lens 351 collimates the chief ray of incident light. The field lens 351 into which red light is incident collimates the chief ray of the red light. The field lens 351 into which green light is incident collimates the chief ray of the green light. The field lens 351 into which blue light is incident collimates the chief ray of the blue light.

[0042] Incident-side polarizing plate 352 adjusts the polarization of each color light that has passed through field lens 351. Incident-side polarizing plate 352 is provided between field lens 351 and transmissive liquid crystal panel 353.

[0043] The transmissive liquid crystal panel 353 modulates the light emitted from the light source unit 31 based on an image signal input from an external device. The transmissive liquid crystal panel 353 modulates the light incident from the incident-side polarizer 352 in accordance with the image signal. The transmissive liquid crystal panel 353 emits the modulated light. The three transmissive liquid crystal panels 353 are a red light transmissive liquid crystal panel 353R, a green light transmissive liquid crystal panel 353G, and a blue light transmissive liquid crystal panel 353B. The red light transmissive liquid crystal panel 353R modulates the red light incident from the incident-side polarizer 352 in accordance with the image signal. The red light transmissive liquid crystal panel 353R emits the modulated red light. The green light transmissive liquid crystal panel 353G modulates the green light incident from the incident-side polarizer 352 in accordance with the image signal. The green light transmissive liquid crystal panel 353G emits the modulated green light. The blue light transmissive liquid crystal panel 353B modulates, in accordance with an image signal, the blue light incident from the incident-side polarizing plate 352. The blue light transmissive liquid crystal panel 353B emits the modulated blue light.

[0044] The transmissive liquid crystal panel 353 has a plurality of pixels arranged along a first axis corresponding to the Y axis and a second axis corresponding to the Z axis. Depending on the aspect ratio of the projected image, the pixels corresponding to the aspect ratio operate.

[0045] The color combining optical system 355 combines the three color lights modulated by the blue light transmissive liquid crystal panel 353B, the green light transmissive liquid crystal panel 353G, and the red light transmissive liquid crystal panel 353R to form image light. The image light formed by the color combining optical system 355 is incident on the projection optical unit 37. The color combining optical system 355 shown in FIG. 3 is formed by a substantially rectangular parallelepiped cross dichroic prism. The color combining optical system 355 may also be formed by a plurality of dichroic mirrors.

[0046] The light path shift module 356 shifts the optical path of the image light formed by the color combining optical system 355. The light path shift module 356 is disposed between the color combining optical system 355 and the projection optical unit 37. The light path shift module 356 increases the resolution of the projection image projected onto the projection surface by shifting the optical path of the image light. The light path shift module 356 has, as an example, two sets of actuators (not shown). The light path shift module 356 oscillates around two oscillation axes by the operation of the two sets of actuators. The two oscillation axes are perpendicular to each other. The actuators are composed of a magnet and a coil.

[0047] The optical component housing 36 accommodates the uniformizing optical system 32, the color separation optical system 33, the relay optical system 34, and the image forming unit 35. The image projection device 30 is designed to have an optical axis Ax. The optical component housing 36 holds the uniformizing optical system 32, the color separation optical system 33, the relay optical system 34, and the image forming unit 35 at predetermined positions on the optical axis Ax. The light source unit 31 and the projection optical unit 37 are arranged at predetermined positions on the optical axis Ax.

[0048] The projection optical unit 37 projects the image light incident from the image forming unit 35 onto the projection surface. A portion of the projection optical unit 37 is disposed so as to protrude from the front surface 20c. The projection optical unit 37 has a lens barrel 371. The lens barrel 371 houses, for example, multiple lenses (not shown). The projection optical unit 37 is composed of a lens assembly having multiple lenses.

[0049] At least a part of the projection optical unit 37 may be configured to be detachable from the image projection device 30. When at least a part of the projection optical unit 37 is detached from the image projection device 30, the image projection device 30 including the projection optical unit 37 remaining in the image projection device 30 corresponds to an example of an optical device. When the entire projection optical unit 37 is detached, the image projection device 30 excluding the projection optical unit 37 corresponds to an example of an optical device.

[0050] 3 is configured to use a transmissive liquid crystal panel 353, but is not limited to this configuration. The image projection device 30 may be configured to use a reflective liquid crystal panel or to include one or more DMDs (Digital Micromirror Devices).

[0051] First embodiment The first embodiment shows a first projector 10a including a plurality of exhaust ports 50 and a plurality of divided connection units 60. The plurality of exhaust ports 50 include a rear exhaust port 50a and a first side exhaust port 50b. The connection unit 60 is divided into a rear connection unit 60a and a first side connection unit 60b.

[0052] FIG. 4 shows a schematic configuration of the projector 10. FIG. 4 shows a schematic configuration of a first projector 10a, which is an example of the projector 10. FIG. 4 shows the first projector 10a as seen from the +Z direction. FIG. 4 shows the rear exhaust port 50a, the first side exhaust port 50b, the rear connection unit 60a, the first side connection unit 60b, and the first housing internal flow path 81a. The first side surface 20d, the rear surface 20e, the indicator 21, the operation panel 23, the image projection device 30, and the air intake 40 of the exterior housing 20 shown in FIG. 4 are the same as the first side surface 20d, the rear surface 20e, the indicator 21, the operation panel 23, the image projection device 30, and the air intake 40 shown in FIGS. 1 and 2.

[0053] The rear exhaust port 50a is an opening configured to allow air circulating inside the exterior housing 20 to pass through. The rear exhaust port 50a is provided on the rear surface 20e. Air passing through the rear exhaust port 50a is discharged in the -X direction. The rear exhaust port 50a corresponds to an example of a first ventilation port. The rear surface 20e on which the rear exhaust port 50a is arranged corresponds to an example of a first surface.

[0054] The first side surface exhaust port 50b is an opening configured to allow air circulating inside the exterior housing 20 to pass through. The first side surface exhaust port 50b is provided on the first side surface 20d. Air passing through the first side surface exhaust port 50b is discharged in the +Y direction. The direction in which air is discharged from the first side surface exhaust port 50b is different from the direction in which air is discharged from the rear surface exhaust port 50a. The first side surface exhaust port 50b corresponds to an example of a second ventilation port. The first side surface 20d on which the first side surface exhaust port 50b is arranged corresponds to an example of a second surface.

[0055] The rear connection unit 60a is connected to an external device for communication. The rear connection unit 60a has a rear input connector 61a. The rear connection unit 60a may have multiple rear input connectors 61a. The rear connection unit 60a may have connectors 61 such as a rear output connector and a rear audio input connector. The rear connection unit 60a having the rear input connector 61a is disposed on the rear surface 20e.

[0056] The first side surface connection unit 60b is communicatively connected to an external device. The first side surface connection unit 60b has a first side surface input connector 61b. The first side surface connection unit 60b may have multiple first side surface input connectors 61b. The first side surface connection unit 60b may have connectors 61 such as a first side surface output connector and a first side surface audio input connector. The first side surface connection unit 60b having the first side surface input connector 61b is disposed on the first side surface 20d.

[0057] The housing internal flow path 81 is a path through which air flows. The first housing internal flow path 81a is an example of the housing internal flow path 81. The first housing internal flow path 81a flows air sent in from the air intake 40. The air flowing through the first housing internal flow path 81a cools the entire image projection device 30, or the light source unit 31, image forming unit 35, etc. included in the image projection device 30. The first housing internal flow path 81a is configured as a duct through which air can flow, for example. The configuration of the housing internal flow path 81 including the first housing internal flow path 81a is not limited as long as it is configured so that air can flow through it. The housing internal flow path 81 including the first housing internal flow path 81a corresponds to an example of an airflow path. A rear exhaust fan 85a and a first side exhaust fan 85b are provided in the first housing internal flow path 81a.

[0058] The rear exhaust fan 85a exhausts air flowing through the first housing internal flow path 81a from the rear exhaust port 50a. The rear exhaust fan 85a is an example of a fan 85. The rear exhaust fan 85a is arranged in a flow path connected to the rear exhaust port 50a. When the rear exhaust fan 85a is driven, the air flowing through the first housing internal flow path 81a is exhausted from the rear exhaust port 50a.

[0059] The first side surface exhaust fan 85b exhausts air flowing through the first housing internal flow path 81a from the first side surface exhaust port 50b. The first side surface exhaust fan 85b is an example of a fan 85. The first side surface exhaust fan 85b is arranged in a flow path connected to the first side surface exhaust port 50b. When the first side surface exhaust fan 85b is driven, the air flowing through the first housing internal flow path 81a is exhausted from the first side surface exhaust port 50b.

[0060] The projector 10 drives at least one of the rear exhaust fan 85a and the first side exhaust fan 85b to exhaust the air in the first housing internal flow path 81a to the outside of the exterior housing 20. The projector 10 can control the direction in which the exhausted air is discharged by controlling the driving of the rear exhaust fan 85a and the first side exhaust fan 85b.

[0061] 5, 6, and 7 show the external configuration of the projector 10. Figures 5, 6, and 7 show the external configuration of a first projector 10a, which is an example of the projector 10. The arrangement of the exhaust port 50, connection unit 60, and power supply unit 70 of the first projector 10a is different from the arrangement of the exhaust port 50, connection unit 60, and power supply unit 70 of the projector 10 shown in Figures 1 and 2.

[0062] 5 shows the rear surface 20e of the first projector 10a. A rear exhaust port 50a, a second rear exhaust port 50c, and a rear connection unit 60a are arranged on the rear surface 20e of the first projector 10a.

[0063] The rear exhaust port 50a is disposed in the +Y direction of the rear surface 20e. The rear exhaust port 50a is connected to the first housing internal flow path 81a. The rear exhaust port 50a exhausts air in the -X direction when the rear exhaust fan 85a is driven.

[0064] The second rear exhaust port 50c is an opening that can exhaust air from inside the exterior housing 20. The second rear exhaust port 50c may be connected to the first housing internal flow path 81a. The second rear exhaust port 50c may be connected to a flow path different from the first housing internal flow path 81a. The second rear exhaust port 50c cools various components arranged inside the exterior housing 20 by exhausting air from inside the exterior housing 20.

[0065] The rear connection unit 60a has a rear input connector 61a. The rear input connector 61a inputs image data from an external device. A connection cable 201 is connected to the rear input connector 61a. The connection cable 201 connects to the external device. The rear input connector 61a connects to the connection cable 201 extending along the X-axis. The rear input connector 61a corresponds to an example of a first connection terminal. The connection cable 201 and the external device connected to the first projector 10a via the connection cable 201 correspond to an example of a connected body.

[0066] 6 shows the first side surface 20d of the first projector 10a. A first side surface exhaust port 50b and a first side surface connection unit 60b are arranged on the first side surface 20d of the first projector 10a.

[0067] The first side surface exhaust port 50b is disposed in the -X direction of the first side surface 20d. The first side surface exhaust port 50b is connected to the first housing internal flow path 81a. The first side surface exhaust port 50b exhausts air in the +Y direction when the first side surface exhaust fan 85b is driven.

[0068] The first side connection unit 60b has a first side input connector 61b. The first side input connector 61b inputs image data from an external device. A connection cable 201 is connected to the first side input connector 61b. The connection cable 201 connects to the external device. The first side input connector 61b connects to the connection cable 201 extending along the Y-axis. The first side input connector 61b corresponds to an example of a second connection terminal.

[0069] 7 shows the second side surface 20f of the first projector 10a. A second side surface exhaust port 50d and a power supply unit 70 having a power supply terminal 71 are disposed on the second side surface 20f of the first projector 10a. The second side surface 20f corresponds to an example of a third surface.

[0070] The second side surface exhaust port 50d is an opening through which air inside the exterior housing 20 can be exhausted. The second side surface exhaust port 50d may be connected to the first housing internal flow path 81a. The second side surface exhaust port 50d may be connected to a flow path different from the first housing internal flow path 81a. The second side surface exhaust port 50d is preferably connected to the first housing internal flow path 81a. Connecting the second side surface exhaust port 50d to the first housing internal flow path 81a improves cooling capacity. The second side surface exhaust port 50d exhausts air inside the exterior housing 20, thereby cooling various components and the like arranged inside the exterior housing 20. The second side surface exhaust port 50d corresponds to an example of a third ventilation port.

[0071] The first projector 10a has the power supply terminal 71 on the second side surface 20f, but is not limited to this. The power supply terminal 71 may be provided on a surface other than the second side surface 20f. The first projector 10a may have multiple power supply terminals 71.

[0072] The first projector 10a includes the second side surface exhaust port 50d, but is not limited to this. Exhaust ports 50 instead of the second side surface exhaust port 50d may be provided on a surface other than the first side surface 20d, the rear surface 20e, and the second side surface 20f.

[0073] Fig. 8 shows a block configuration of the projector 10. Fig. 8 shows a block configuration of a first projector 10a, which is an example of the projector 10. The first projector 10a includes an operation panel 23, an image projection device 30, a rear connection unit 60a, a first side connection unit 60b, a first exhaust mechanism 80a, which is an example of the exhaust mechanism 80, a control unit 100, and a connection detection unit 110.

[0074] The first exhaust mechanism 80a adjusts the flow rate, flow direction, etc. of the air flowing through the first housing internal flow path 81a. The first exhaust mechanism 80a has a rear exhaust fan 85a and a first side exhaust fan 85b. The first exhaust mechanism 80a is driven under the control of the control unit 100. The flow rate, flow direction, etc. of the air flowing through the first housing internal flow path 81a are adjusted by driving at least one of the rear exhaust fan 85a and the first side exhaust fan 85b included in the first exhaust mechanism 80a. When the rear exhaust fan 85a is driven and the first side exhaust fan 85b is stopped, the air flowing through the first housing internal flow path 81a is exhausted from the rear exhaust port 50a. When the rear exhaust fan 85a is stopped and the first side exhaust fan 85b is driven, the air flowing through the first housing internal flow path 81a is exhausted from the first side exhaust port 50b. When the rear exhaust fan 85a and the first side exhaust fan 85b are driven, the air flowing through the first housing internal flow path 81a is exhausted from the rear exhaust port 50a and the first side exhaust port 50b.

[0075] The control unit 100 is a controller that controls the projector 10. As an example, the control unit 100 is a processor having a CPU (Central Processing Unit). The control unit 100 is composed of one or more processors. The control unit 100 may have semiconductor memory such as a ROM (Read Only Memory) or a RAM (Random Access Memory). The semiconductor memory functions as a work area for the control unit 100. The control unit 100 functions as various functional units by executing a control program. The control program is stored in a memory (not shown). By executing the control program, the control unit 100 operates as an image control unit 101 and an airflow control unit 103. The control unit 100 may also operate as a functional unit other than the image control unit 101 and the airflow control unit 103.

[0076] The image control unit 101 controls the image projected by the projector 10. The image control unit 101 receives image data from an external device via the rear connection unit 60a or the first side connection unit 60b. The image control unit 101 may receive image data stored in a memory or the like. The image control unit 101 drives the image projection device 30 based on the image data. By driving the image projection device 30, the image control unit 101 projects a projection image onto the projection surface.

[0077] The airflow control unit 103 controls the driving of the first exhaust mechanism 80a. By controlling the driving of the first exhaust mechanism 80a, the airflow control unit 103 controls the flow rate, flow direction, etc. of the air flowing through the first housing internal flow path 81a. The airflow control unit 103 receives a detection signal from the connection detection unit 110. Based on the detection signal, the airflow control unit 103 drives the first exhaust mechanism 80a to control the flow rate, flow direction, etc. of the air flowing through the first housing internal flow path 81a.

[0078] The connection detection unit 110 detects that the connector 61 is connected to an external device via the connection cable 201. The connection detection unit 110 may detect that the connector 61 is connected to the connection cable 201. The connection detection unit 110 may detect that the power terminal 71 is connected to a power source via the power cable 211. When the connection detection unit 110 detects that the connector 61 is connected to an external device or the like, it transmits a detection signal to the control unit 100. The connection detection unit 110 electrically detects that the connector 61 is connected to an external device or the like. The connection detection unit 110 is, for example, disposed within the connection unit 60. The connection detection unit 110 detects that an electrical signal flows within the connection unit 60 via the connection cable 201, thereby detecting that the connector 61 is connected to an external device or the like. The connection detection unit 110 may be constituted by a switch provided in the connection unit 60. The switch is driven when the connector 61 is connected to the connection cable 201, and outputs a detection signal. The switch physically detects that the connector 61 is connected to the connection cable 201. The connection detection unit 110 corresponds to an example of a detection mechanism.

[0079] 8 is disposed in the rear connection unit 60a and the first side connection unit 60b. The connection detection unit 110 detects that an external device or the like is connected to at least one of the rear input connector 61a and the first side input connector 61b.

[0080] Fig. 9 shows a schematic configuration of the projector 10. Fig. 9 shows a first projector 10a in which a first connection cable 201a, which is an example of the connection cable 201, is connected to a rear input connector 61a. The first connection cable 201a is connected to an external device. The first connection cable 201a is an HDMI cable or the like.

[0081] FIG. 9 shows that the first projector 10a is disposed so that the first connection cable 201a can be connected to the rear input connector 61a. By providing a space in which the first connection cable 201a can be placed in the -X direction of the rear surface 20e, the first connection cable 201a can be connected to the rear input connector 61a. By detecting that the first connection cable 201a is connected to the rear input connector 61a, the first projector 10a can predict that there is a space in which air can be exhausted in the -X direction of the rear exhaust port 50a. On the other hand, the connection cable 201 is not connected to the first side input connector 61b. The first projector 10a cannot predict that there is a space in which air can be exhausted in the +Y direction of the first side exhaust port 50b. The first projector 10a determines the exhaust direction by detecting the connector 61 to which the connection cable 201 is connected.

[0082] By a user's operation, the rear input connector 61a is connected to the first connection cable 201a connected to the external device. The connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. As an example, the connection detection unit 110 detects an electrical signal flowing between the first projector 10a and the external device in the rear connection unit 60a. By detecting the electrical signal, the connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 transmits a detection signal to the control unit 100 indicating that an external device has been connected to the rear input connector 61a.

[0083] The control unit 100 receives the detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the first exhaust mechanism 80a based on the detection signal. The airflow control unit 103 drives the rear exhaust fan 85a and stops the first side exhaust fan 85b. By driving the rear exhaust fan 85a, the air in the first housing internal flow path 81a passes through the rear exhaust port 50a and is exhausted to the outside of the exterior housing 20. The rear exhaust port 50a exhausts the air flowing through the first housing internal flow path 81a. The first projector 10a exhausts air in the -X direction of the rear surface 20e, where there is a high probability that an exhaust space is secured. If an exhaust space is not secured, the cooling capacity will decrease due to exhaust. The first projector 10a can suppress the decrease in cooling capacity due to exhaust.

[0084] FIG. 10 shows a schematic configuration of the projector 10. FIG. 10 shows a first projector 10a in which a second connection cable 201b, which is an example of the connection cable 201, is connected to the first side input connector 61b. The second connection cable 201b is connected to an external device. The second connection cable 201b is an HDMI cable or the like. The second connection cable 201b may be the same as or different from the first connection cable 201a.

[0085] FIG. 10 shows that the first projector 10a is arranged so that the second connection cable 201b can be connected to the first side input connector 61b. By providing a space in which the second connection cable 201b can be arranged in the +Y direction of the first side surface 20d, the second connection cable 201b can be connected to the first side input connector 61b. By detecting that the second connection cable 201b is connected to the first side input connector 61b, the first projector 10a can predict that there is a space in which air can be exhausted in the +Y direction of the first side exhaust port 50b. On the other hand, the connection cable 201 is not connected to the rear input connector 61a. The first projector 10a cannot predict that there is a space in which air can be exhausted in the -X direction of the rear exhaust port 50a. The first projector 10a determines the exhaust direction by detecting the connector 61 to which the connection cable 201 is connected.

[0086] By user operation, the first side input connector 61b is connected to the second connection cable 201b connected to the external device. The connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. As an example, the connection detection unit 110 detects an electrical signal flowing between the first projector 10a and the external device within the first side connection unit 60b. By detecting the electrical signal, the connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 transmits a detection signal to the control unit 100 indicating that an external device has been connected to the first side input connector 61b.

[0087] The control unit 100 receives the detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the first exhaust mechanism 80a based on the detection signal. The airflow control unit 103 drives the first side exhaust fan 85b and stops the rear exhaust fan 85a. By driving the first side exhaust fan 85b, the air in the first housing internal flow path 81a passes through the first side exhaust port 50b and is exhausted to the outside of the exterior housing 20. The first side exhaust port 50b exhausts the air flowing through the first housing internal flow path 81a. The first projector 10a exhausts air in the +Y direction of the first side surface 20d, where there is a high possibility that an exhaust space is secured. The first projector 10a can suppress a decrease in cooling capacity due to exhaust.

[0088] FIG. 11 shows a schematic configuration of the projector 10. FIG. 11 shows a first projector 10a to which a first connection cable 201a and a second connection cable 201b are connected. The first connection cable 201a is connected to the rear input connector 61a. The second connection cable 201b is connected to the first side input connector 61b. The first connection cable 201a and the second connection cable 201b are each connected to an external device. The first connection cable 201a and the second connection cable 201b may be connected to the same external device or different external devices. The first connection cable 201a and the second connection cable 201b are HDMI cables or the like. The first connection cable 201a may be the same as or different from the second connection cable 201b.

[0089] FIG. 11 shows that the first projector 10a is arranged so that the first connection cable 201a can be connected to the rear input connector 61a. By providing a space in the -X direction of the rear surface 20e where the first connection cable 201a can be placed, the first connection cable 201a can be connected to the rear input connector 61a. By detecting that the first connection cable 201a is connected to the rear input connector 61a, the first projector 10a can predict that there is a space in the -X direction of the rear exhaust port 50a where air can be exhausted. FIG. 11 shows that the first projector 10a is arranged so that the second connection cable 201b can be connected to the first side input connector 61b. By providing a space in the +Y direction of the first side surface 20d where the second connection cable 201b can be placed, the second connection cable 201b can be connected to the first side input connector 61b. By detecting that the second connection cable 201b has been connected to the first side input connector 61b, the first projector 10a can predict that there is space available for exhaust in the +Y direction of the first side exhaust port 50b.

[0090] When the rear input connector 61a is connected to the first connection cable 201a connected to an external device by a user operation, the connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 detects an electrical signal flowing between the first projector 10a and the external device within the rear connection unit 60a. By detecting the electrical signal, the connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 transmits a first detection signal to the control unit 100 indicating that the rear input connector 61a has been connected to the external device. The first detection signal is an example of a detection signal.

[0091] When the user connects the first side input connector 61b to the second connection cable 201b connected to the external device, the connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 detects an electrical signal flowing between the first projector 10a and the external device within the first side connection unit 60b. By detecting the electrical signal, the connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 transmits a second detection signal to the control unit 100 indicating that the first side input connector 61b has been connected to the external device. The second detection signal is an example of a detection signal.

[0092] The control unit 100 receives the first detection signal and the second detection signal. The airflow control unit 103 of the control unit 100 controls the operation of the first exhaust mechanism 80a based on the first detection signal and the second detection signal. The airflow control unit 103 drives the rear exhaust fan 85a and the first side exhaust fan 85b. By driving the rear exhaust fan 85a and the first side exhaust fan 85b, the air in the first housing internal flow path 81a passes through the rear exhaust port 50a and the first side exhaust port 50b and is exhausted to the outside of the exterior housing 20. The rear exhaust port 50a and the first side exhaust port 50b exhaust the air flowing through the first housing internal flow path 81a. The first projector 10a exhausts air in the -X direction of the rear surface 20e and the +Y direction of the first side surface 20d, where there is a high possibility that an exhaust space is secured. The first projector 10a can suppress a decrease in cooling capacity due to exhaust.

[0093] The first projector 10a includes an exterior housing 20 that houses the image projection device 30 and has a rear surface 20e and a first side surface 20d, a first housing internal flow path 81a that circulates air to cool the image projection device 30, a rear exhaust port 50a that is disposed on the rear surface 20e and through which the air circulating in the first housing internal flow path 81a can pass, a first side surface exhaust port 50b that is disposed on the first side surface 20d and through which the air circulating in the first housing internal flow path 81a can pass, a rear input connector 61a that is disposed on the rear surface 20e, the first side surface input connector 61b that is disposed on the first side surface 20d, and a connection detection unit 110 that detects that the rear input connector 61a is connected to the connection cable 201. When the connection detection unit 110 detects that the rear input connector 61a is connected to the connection cable 201, air passes through the rear exhaust port 50a. The first projector 10a can utilize a space that is free of other devices, walls, etc. The first projector 10a can prevent a decrease in cooling capacity due to ventilation.

[0094] The rear exhaust port 50a and the first side exhaust port 50b exhaust air flowing through the first housing internal flow path 81a to the outside of the exterior housing 20. The first projector 10a can suppress a decrease in cooling capacity caused by discharging the air flowing through the first housing internal flow path 81a.

[0095] In the first embodiment, the exhaust ports 50 connected to the first housing internal flow path 81a are arranged on the first side surface 20d and the rear surface 20e, but this is not limited to this. The two exhaust ports 50 connected to the first housing internal flow path 81a may be arranged on surfaces other than the first side surface 20d and the rear surface 20e. Two connection units 60 having connectors 61 are each arranged on the surface on which the exhaust ports 50 are arranged.

[0096] The exterior housing 20 has a second side surface 20f different from the back surface 20e and the first side surface 20d. The second side surface 20f preferably has a second side surface exhaust port 50d that exhausts air flowing through the first housing internal flow path 81a to the outside of the exterior housing 20. The second side surface exhaust port 50d is connected to the first housing internal flow path 81a, thereby improving the cooling capacity.

[0097] Second embodiment The second embodiment shows a second projector 10b including an exhaust unit 91 having two exhaust ports 50 and a connection unit 60 divided into multiple parts. The exhaust unit 91 has a rear exhaust port 50a and a first side exhaust port 50b. The connection unit 60 is divided into a rear connection unit 60a and a first side connection unit 60b.

[0098] FIG. 12 shows a schematic configuration of the projector 10. FIG. 12 shows a schematic configuration of a second projector 10b, which is an example of the projector 10. The second projector 10b has the same configuration as the first projector 10a, except for the position of the operation panel 23, the configuration of the internal housing flow path 81, and the exhaust unit 91 having two exhaust ports 50. The position of the operation panel 23 of the second projector 10b may be the same as the position of the operation panel 23 of the first projector 10a. The position of the operation panel 23 is set appropriately. The second projector 10b has a second internal housing flow path 81b and a first exhaust unit 91a.

[0099] The second housing internal flow path 81b is an example of the housing internal flow path 81. The second housing internal flow path 81b is a path that connects the intake port 40 and the first exhaust unit 91a and allows air to circulate. The second housing internal flow path 81b is connected to the first exhaust unit 91a and allows air to circulate inside the first exhaust unit 91a. An exhaust fan 85c is arranged in the second housing internal flow path 81b.

[0100] The exhaust fan 85c causes the air in the second housing flow path 81b to flow. The exhaust fan 85c is an example of a fan 85. The exhaust fan 85c causes the air to flow toward the first exhaust unit 91a. The exhaust fan 85c is disposed in the second housing flow path 81b. The position at which the exhaust fan 85c is disposed is set appropriately.

[0101] The first exhaust unit 91a changes the direction in which air is exhausted. The first exhaust unit 91a is an example of the exhaust unit 91. The first exhaust unit 91a is connected to the second housing internal flow path 81b. The first exhaust unit 91a exhausts air that flows in from the second housing internal flow path 81b to the outside of the exterior housing 20. The first exhaust unit 91a has a rear exhaust port 50a and a first side exhaust port 50b. The rear exhaust port 50a and the first side exhaust port 50b exhaust air that flows into the first exhaust unit 91a to the outside of the exterior housing 20. The first exhaust unit 91a has a first unit surface S1 and a second unit surface S2.

[0102] The first unit surface S1 is arranged parallel or approximately parallel to the rear surface 20e. Here, approximately parallel means that the intersection angle between the first unit surface S1 and the rear surface 20e is within 5°. The first unit surface S1 is arranged along the rear surface 20e. A rear exhaust port 50a is arranged on the first unit surface S1. By arranging the rear exhaust port 50a on the first unit surface S1, the rear exhaust port 50a and the rear connection unit 60a are arranged on substantially the same plane.

[0103] The second unit surface S2 is arranged parallel or approximately parallel to the first side surface 20d. Here, approximately parallel means that the intersection angle between the second unit surface S2 and the first side surface 20d is within 5°. The second unit surface S2 is arranged along the first side surface 20d. The first side surface exhaust port 50b is arranged on the second unit surface S2. By arranging the first side surface exhaust port 50b on the second unit surface S2, the first side surface exhaust port 50b and the first side surface connecting unit 60b are arranged on substantially the same plane.

[0104] 13 and 14 show the external configuration of the projector 10. FIGS. 13 and 14 show the external configuration of a second projector 10b, which is an example of the projector 10. The arrangement of the exhaust port 50 and the connection unit 60 of the second projector 10b is different from the arrangement of the exhaust port 50 and the connection unit 60 of the projector 10 shown in FIGS. 1 and 2. The second side surface 20f of the second projector 10b is the same as the second side surface 20f of the first projector 10a shown in FIG.

[0105] 13 shows the rear surface 20e of the second projector 10b. A rear exhaust port 50a, a second rear exhaust port 50c, and a rear connection unit 60a are arranged on the rear surface 20e of the second projector 10b. The second rear exhaust port 50c and rear connection unit 60a of the second projector 10b have the same configuration as the second rear exhaust port 50c and rear connection unit 60a of the first projector 10a.

[0106] The rear exhaust port 50a is disposed on the first unit surface S1 of the first exhaust unit 91a. The rear exhaust port 50a is disposed in the +Y direction on the rear surface 20e. The rear exhaust port 50a can exhaust air flowing in the -X direction when the exhaust fan 85c is driven.

[0107] 14 shows the first side surface 20d of the second projector 10b. A first side surface exhaust port 50b and a first side surface connection unit 60b are arranged on the first side surface 20d of the second projector 10b. The first side surface connection unit 60b of the second projector 10b has the same configuration as the first side surface connection unit 60b of the first projector 10a.

[0108] The first side surface exhaust port 50b is disposed on the second unit surface S2 of the first exhaust unit 91a. The first side surface exhaust port 50b is disposed on the first side surface 20d in the -X direction. The first side surface exhaust port 50b can exhaust air flowing in the +Y direction when the exhaust fan 85c is driven.

[0109] Fig. 15 shows a block configuration of the projector 10. Fig. 15 shows a block configuration of a second projector 10b which is an example of the projector 10. The second projector 10b includes an operation panel 23, an image projection device 30, a rear connection unit 60a, a first side connection unit 60b, a second exhaust mechanism 80b which is an example of the exhaust mechanism 80, a control unit 100, and a connection detection unit 110.

[0110] The second exhaust mechanism 80b adjusts the flow rate and exhaust direction of air exhausted from the exterior housing 20. The second exhaust mechanism 80b is driven under the control of the control unit 100. The second exhaust mechanism 80b has an exhaust fan 85c and a first exhaust unit 91a.

[0111] The exhaust fan 85c is driven under the control of the airflow control section 103 of the control unit 100. By driving the exhaust fan 85c, the flow rate of air flowing through the second housing internal flow path 81b is adjusted.

[0112] The first exhaust unit 91a has a mechanism for opening and closing the rear exhaust port 50a and the first side exhaust port 50b. The first exhaust unit 91a adjusts the exhaust direction of air exhausted from the exterior housing 20 by opening and closing the rear exhaust port 50a and the first side exhaust port 50b. The first exhaust unit 91a is driven under the control of the airflow control unit 103. The first exhaust unit 91a has a shielding unit 92, a drive mechanism 93, and a drive motor 93m. The first exhaust unit 91a corresponds to an example of an opening and closing mechanism.

[0113] The shielding unit 92 opens and closes the rear exhaust port 50a and the first side exhaust port 50b. The shielding unit 92 is driven by a drive mechanism 93 and a drive motor 93m. The shielding unit 92 is driven to shield at least one of the rear exhaust port 50a and the first side exhaust port 50b. The shielding unit 92 corresponds to an example of an opening / closing member.

[0114] The drive mechanism 93 drives the shielding unit 92. The drive mechanism 93 uses a driving force from a drive motor 93m to drive the shielding unit 92. The drive mechanism 93 drives the shielding unit 92 based on the control of the airflow control unit 103.

[0115] The drive motor 93m generates a drive force for driving the shielding unit 92. The rotation direction, rotation amount, etc. of the drive motor 93m are controlled by the airflow control unit 103. By controlling the rotation direction, the drive direction of the shielding unit 92 is controlled. By controlling the rotation amount, the stop position of the shielding unit 92 is controlled.

[0116] The control unit 100 of the second projector 10b controls each unit such as the second exhaust mechanism 80b. The airflow control unit 103 controls the driving of the first exhaust unit 91a. By controlling the driving of the first exhaust unit 91a, the airflow control unit 103 adjusts the exhaust direction in which air is exhausted from the exterior housing 20. Based on a detection signal transmitted from the connection detection unit 110, the airflow control unit 103 controls the driving of the first exhaust unit 91a and adjusts the exhaust direction of the air.

[0117] Fig. 16 shows a schematic configuration of the projector 10. Fig. 16 shows a second projector 10b in which a first connection cable 201a, which is an example of the connection cable 201, is connected to the rear input connector 61a. The first connection cable 201a is connected to an external device.

[0118] FIG. 16 shows that the second projector 10b is disposed so that the first connection cable 201a can be connected to the rear input connector 61a. By providing a space in which the first connection cable 201a can be disposed in the -X direction of the rear surface 20e, the first connection cable 201a can be connected to the rear input connector 61a. By detecting that the first connection cable 201a is connected to the rear input connector 61a, the second projector 10b can predict that there is a space in which air can be exhausted in the -X direction of the rear exhaust port 50a. On the other hand, the connection cable 201 is not connected to the first side input connector 61b. The second projector 10b cannot predict that there is a space in which air can be exhausted in the +Y direction of the first side exhaust port 50b. The second projector 10b determines the exhaust direction by detecting the connector 61 to which the connection cable 201 is connected.

[0119] By a user's operation, the rear input connector 61a is connected to a first connection cable 201a connected to an external device. The connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. As an example, the connection detection unit 110 detects an electrical signal flowing between the second projector 10b and the external device in the rear connection unit 60a. By detecting the electrical signal, the connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 transmits a first detection signal to the control unit 100 indicating that the rear input connector 61a has been connected to the external device.

[0120] The control unit 100 receives the first detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the first exhaust unit 91a based on the first detection signal. The airflow control unit 103 drives the driving mechanism 93 and the driving motor 93m to drive the shielding unit 92. The shielding unit 92 is driven to open the rear exhaust port 50a and close the first side exhaust port 50b.

[0121] Fig. 17 shows a schematic configuration of the exhaust unit 91. Fig. 17 shows a schematic configuration of a first exhaust unit 91a, which is an example of the exhaust unit 91. The first exhaust unit 91a has a shielding unit 92, a drive mechanism 93, and a drive motor 93m.

[0122] The shielding unit 92 shields either the rear exhaust port 50a or the first side exhaust port 50b. The shielding unit 92 is configured to be drivable. The shielding unit 92 has a first shielding plate 92a and a second shielding plate 92b.

[0123] The first shielding plate 92a is disposed along the first unit surface S1. The first shielding plate 92a moves in the +Y direction or the -Y direction along the first unit surface S1. The first shielding plate 92a opens and closes the rear exhaust port 50a. FIG. 17 shows a state in which the first shielding plate 92a has moved to a position where it does not face the rear exhaust port 50a. When the airflow control unit 103 receives a first detection signal from the connection detection unit 110, it moves the first shielding plate 92a to a position where it does not face the rear exhaust port 50a. The first shielding plate 92a opens the rear exhaust port 50a. When the first shielding plate 92a opens the rear exhaust port 50a, air from the second housing internal flow path 81b passes through the rear exhaust port 50a and is discharged to the outside of the exterior housing 20.

[0124] The second shielding plate 92b is disposed along the second unit surface S2. The second shielding plate 92b moves in the +X direction or the -X direction along the second unit surface S2. The second shielding plate 92b opens and closes the first side surface exhaust port 50b. FIG. 17 shows a state in which the second shielding plate 92b has moved to a position facing the first side surface exhaust port 50b. When the airflow control unit 103 receives a first detection signal from the connection detection unit 110, it moves the second shielding plate 92b to a position facing the first side surface exhaust port 50b. The second shielding plate 92b closes the first side surface exhaust port 50b. When the second shielding plate 92b closes the first side surface exhaust port 50b, air from the second housing internal flow path 81b is not discharged through the first side surface exhaust port 50b.

[0125] The drive mechanism 93 moves the first shielding plate 92a and the second shielding plate 92b included in the shielding unit 92. The drive mechanism 93 is connected to the first shielding plate 92a and the second shielding plate 92b, and moves the first shielding plate 92a and the second shielding plate 92b in conjunction with each other. The drive mechanism 93 has a drive gear 93a and a drive transmission member 93b.

[0126] The drive gear 93a transmits the driving force generated by the drive motor 93m to the drive transmission member 93b. The drive gear 93a may be disposed on the rotation shaft of the drive motor 93m, or may be connected to the rotation shaft via a belt or a group of gears. The drive gear 93a rotates in one direction or in another direction opposite to the one direction.

[0127] The drive transmission member 93b moves the first shielding plate 92a and the second shielding plate 92b. The drive transmission member 93b meshes with the drive gear 93a and receives the driving force. When the drive gear 93a rotates in one direction, the first shielding plate 92a moves in the +Y direction, and the second shielding plate 92b moves in the +X direction. When the drive gear 93a rotates in the other direction, the first shielding plate 92a moves in the -Y direction, and the second shielding plate 92b moves in the -X direction.

[0128] The drive motor 93m transmits a driving force to the drive gear 93a. By transmitting the driving force, the drive motor 93m drives the shielding unit 92, which includes the first shielding plate 92a and the second shielding plate 92b. The drive motor 93m moves the first shielding plate 92a included in the shielding unit 92 along the rear exhaust port 50a. The drive motor 93m moves the second shielding plate 92b included in the shielding unit 92 along the first side exhaust port 50b. The drive motor 93m corresponds to an example of a motor.

[0129] When the airflow control unit 103 receives the first detection signal, it controls the operation of the shielding unit 92. Based on the control of the airflow control unit 103, the shielding unit 92 opens the rear exhaust port 50a using the first shielding plate 92a and closes the first side exhaust port 50b using the second shielding plate 92b. The shielding unit 92 can exhaust air circulating inside the second housing flow path 81b in the -X direction through the rear exhaust port 50a.

[0130] Fig. 18 shows a schematic configuration of the projector 10. Fig. 18 shows a second projector 10b in which a second connection cable 201b, which is an example of the connection cable 201, is connected to the first side input connector 61b. The second connection cable 201b is connected to an external device.

[0131] FIG. 18 shows that the second projector 10b is arranged so that the second connection cable 201b can be connected to the first side input connector 61b. By providing a space in which the second connection cable 201b can be arranged in the +Y direction of the first side surface 20d, the second connection cable 201b can be connected to the first side input connector 61b. By detecting that the second connection cable 201b is connected to the first side input connector 61b, the second projector 10b can predict that there is a space in which air can be exhausted in the +Y direction of the first side exhaust port 50b. On the other hand, the connection cable 201 is not connected to the rear input connector 61a. The second projector 10b cannot predict that there is a space in which air can be exhausted in the -X direction of the rear exhaust port 50a. The second projector 10b determines the exhaust direction by detecting the connector 61 to which the connection cable 201 is connected.

[0132] By user operation, the first side input connector 61b is connected to the second connection cable 201b connected to the external device. The connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. As an example, the connection detection unit 110 detects an electrical signal flowing between the second projector 10b and the external device within the first side connection unit 60b. By detecting the electrical signal, the connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 transmits a second detection signal to the control unit 100 indicating that the first side input connector 61b has been connected to the external device.

[0133] The control unit 100 receives the second detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the first exhaust unit 91a based on the second detection signal. The airflow control unit 103 drives the drive mechanism 93 and the drive motor 93m to drive the shielding unit 92. The shielding unit 92 is driven to open the first side exhaust port 50b and close the rear exhaust port 50a.

[0134] Fig. 19 shows a schematic configuration of the exhaust unit 91. Fig. 19 shows a schematic configuration of a first exhaust unit 91a, which is an example of the exhaust unit 91. Fig. 19 shows the control result when the airflow control unit 103 receives the second detection signal.

[0135] The second shielding plate 92b moves to a position where it does not face the first side surface exhaust port 50b. When the airflow control unit 103 receives a second detection signal from the connection detection unit 110, it moves the second shielding plate 92b to a position where it does not face the first side surface exhaust port 50b. The second shielding plate 92b opens the first side surface exhaust port 50b. When the second shielding plate 92b opens the first side surface exhaust port 50b, air from the second housing internal flow path 81b passes through the first side surface exhaust port 50b and is discharged to the outside of the exterior housing 20.

[0136] The first shielding plate 92a moves to a position facing the rear exhaust port 50a. When the airflow control unit 103 receives a second detection signal from the connection detection unit 110, it moves the first shielding plate 92a to a position facing the rear exhaust port 50a. The first shielding plate 92a closes the rear exhaust port 50a. When the first shielding plate 92a closes the rear exhaust port 50a, air from the second housing internal flow path 81b is not discharged from the rear exhaust port 50a.

[0137] When the airflow control unit 103 receives the second detection signal, it controls the operation of the shielding unit 92. Based on the control of the airflow control unit 103, the shielding unit 92 closes the rear exhaust port 50a using the first shielding plate 92a and opens the first side exhaust port 50b using the second shielding plate 92b. The shielding unit 92 can exhaust air circulating inside the second housing flow path 81b in the +Y direction via the first side exhaust port 50b.

[0138] Fig. 20 shows a schematic configuration of the projector 10. Fig. 20 shows a second projector 10b to which a first connection cable 201a and a second connection cable 201b are connected. The first connection cable 201a is connected to the rear input connector 61a. The second connection cable 201b is connected to the first side input connector 61b. The first connection cable 201a and the second connection cable 201b are each connected to an external device. The first connection cable 201a and the second connection cable 201b may be connected to the same external device or may be connected to different external devices.

[0139] FIG. 20 shows that the second projector 10b is arranged so that the first connection cable 201a can be connected to the rear input connector 61a. By providing a space in the -X direction of the rear surface 20e where the first connection cable 201a can be placed, the first connection cable 201a can be connected to the rear input connector 61a. By detecting that the first connection cable 201a has been connected to the rear input connector 61a, the second projector 10b can predict that there is a space in the -X direction of the rear exhaust port 50a where air can be exhausted. FIG. 20 shows that the second projector 10b is arranged so that the second connection cable 201b can be connected to the first side input connector 61b. By providing a space in the +Y direction of the first side surface 20d where the second connection cable 201b can be placed, the second connection cable 201b can be connected to the first side input connector 61b. By detecting that the second connection cable 201b has been connected to the first side input connector 61b, the second projector 10b can predict that there is space available for exhaust in the +Y direction of the first side exhaust port 50b.

[0140] When the rear input connector 61a is connected to the first connection cable 201a connected to an external device by a user operation, the connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 detects an electrical signal flowing between the second projector 10b and the external device within the rear connection unit 60a. By detecting the electrical signal, the connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 transmits a first detection signal to the control unit 100 indicating that the rear input connector 61a has been connected to the external device.

[0141] When the user connects the first side input connector 61b to the second connection cable 201b connected to the external device, the connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 detects an electrical signal flowing between the second projector 10b and the external device within the first side connection unit 60b. By detecting the electrical signal, the connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 transmits a second detection signal to the control unit 100 indicating that the first side input connector 61b has been connected to the external device.

[0142] The control unit 100 receives the first detection signal and the second detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the first exhaust unit 91a based on the first detection signal and the second detection signal. The airflow control unit 103 drives the driving mechanism 93 and the driving motor 93m to drive the shielding unit 92. The driving of the shielding unit 92 opens a portion of the rear exhaust port 50a and a portion of the first side exhaust port 50b.

[0143] Fig. 21 shows a schematic configuration of the exhaust unit 91. Fig. 21 shows a schematic configuration of a first exhaust unit 91a, which is an example of the exhaust unit 91. Fig. 21 shows the control result when the airflow control unit 103 receives the first detection signal and the second detection signal.

[0144] The first shielding plate 92a moves to a position where it does not face a portion of the rear exhaust port 50a. When the airflow control unit 103 receives the first detection signal and the second detection signal from the connection detection unit 110, it moves the first shielding plate 92a to a position where it does not face a portion of the rear exhaust port 50a. The first shielding plate 92a opens a portion of the rear exhaust port 50a. When the first shielding plate 92a opens a portion of the rear exhaust port 50a, air from the second housing internal flow path 81b passes through the rear exhaust port 50a and is discharged to the outside of the exterior housing 20.

[0145] The second shielding plate 92b moves to a position where it does not face a portion of the first side surface exhaust port 50b. When the airflow control unit 103 receives the first detection signal and the second detection signal from the connection detection unit 110, it moves the second shielding plate 92b to a position where it does not face a portion of the first side surface exhaust port 50b. The second shielding plate 92b opens a portion of the first side surface exhaust port 50b. When the second shielding plate 92b opens a portion of the first side surface exhaust port 50b, air from the second housing internal flow path 81b passes through the first side surface exhaust port 50b and is discharged to the outside of the exterior housing 20.

[0146] The first shielding plate 92a moves to a position facing the rear exhaust port 50a. When the airflow control unit 103 receives a second detection signal from the connection detection unit 110, it moves the first shielding plate 92a to a position facing the rear exhaust port 50a. The first shielding plate 92a closes the rear exhaust port 50a. When the first shielding plate 92a closes the rear exhaust port 50a, air from the second housing internal flow path 81b is not discharged from the rear exhaust port 50a.

[0147] When the airflow control unit 103 receives the first detection signal and the second detection signal, it controls the operation of the shielding unit 92. Based on the control of the airflow control unit 103, the shielding unit 92 uses the first shielding plate 92a to open a portion of the rear exhaust port 50a, and uses the second shielding plate 92b to open a portion of the first side exhaust port 50b. The shielding unit 92 can exhaust air flowing through the second housing flow path 81b in the -X direction through the rear exhaust port 50a, and in the +Y direction through the first side exhaust port 50b.

[0148] The second projector 10b has a first exhaust unit 91a that opens and closes the rear exhaust port 50a and the first side exhaust port 50b. When the connection detection unit 110 detects that the rear input connector 61a is connected to the first connection cable 201a, the first exhaust unit 91a opens the rear exhaust port 50a to exhaust air from the rear exhaust port 50a and closes the first side exhaust port 50b. The second projector 10b exhausts air in a direction where there is a high possibility that an exhaust space is secured, thereby suppressing a decrease in cooling capacity due to exhaust.

[0149] The connection detection unit 110 detects that the first side input connector 61b is connected to the second connection cable 201b. When it detects that the first side input connector 61b is connected to the second connection cable 201b, the first exhaust unit 91a closes the rear exhaust port 50a and opens the first side exhaust port 50b to exhaust air from the first side exhaust port 50b. The second projector 10b exhausts air in a direction where there is a high possibility that an exhaust space is secured, thereby suppressing a decrease in cooling capacity due to exhaust.

[0150] When the connection detection unit 110 detects that the rear input connector 61a and the first side input connector 61b are connected to the connection cable 201, the first exhaust unit 91a opens the rear exhaust port 50a and the first side exhaust port 50b to exhaust air from the rear exhaust port 50a and the first side exhaust port 50b. The second projector 10b exhausts air in a direction where there is a high possibility that an exhaust space is secured, thereby suppressing a decrease in cooling capacity due to exhaust.

[0151] The first exhaust unit 91a has a shielding unit 92 that opens and closes the rear exhaust port 50a and the first side exhaust port 50b, and a drive motor 93m that moves the shielding unit 92. The second projector 10b can open and close the rear exhaust port 50a and the first side exhaust port 50b with a space-saving mechanism.

[0152] The drive motor 93m moves the first shielding plate 92a included in the shielding unit 92 along the rear exhaust port 50a. The second projector 10b can adjust the opening size of the rear exhaust port 50a.

[0153] Third embodiment The third embodiment shows a third projector 10c that includes an exhaust unit 91 having two exhaust ports 50, and a connection unit 60 that is divided into multiple parts. The exhaust unit 91 has a rear exhaust port 50a and a first side exhaust port 50b. The connection unit 60 is divided into a rear connection unit 60a and a first side connection unit 60b. The third projector 10c includes a third exhaust mechanism 80c instead of the second exhaust mechanism 80b included in the second projector 10b. The configuration of the third projector 10c is the same as the configuration of the second projector 10b, except for the exhaust mechanism 80.

[0154] 22 and 23 show the external configuration of the projector 10. FIGS. 22 and 23 show the external configuration of a third projector 10c, which is an example of the projector 10. The third projector 10c has a second exhaust unit 91b instead of the first exhaust unit 91a of the second projector 10b. The positions of the rear exhaust port 50a and the first side exhaust port 50b provided in the second exhaust unit 91b are different from the positions of the rear exhaust port 50a and the first side exhaust port 50b of the first exhaust unit 91a. The external configuration of the third projector 10c is the same as the external configuration of the second projector 10b, except for the positions of the rear exhaust port 50a and the first side exhaust port 50b.

[0155] 22 shows the rear surface 20e of the third projector 10c. A rear exhaust port 50a, a second rear exhaust port 50c, and a rear connection unit 60a are arranged on the rear surface 20e of the third projector 10c. The second rear exhaust port 50c and rear connection unit 60a of the third projector 10c have the same configuration as the second rear exhaust port 50c and rear connection unit 60a of the second projector 10b.

[0156] The rear exhaust port 50a is arranged on the first unit surface S1 of the second exhaust unit 91b. The rear exhaust port 50a is arranged in a position in the +Y direction on the rear surface 20e. The position of the rear exhaust port 50a of the third projector 10c is arranged in a position in the +Y direction further than the position of the rear exhaust port 50a of the second projector 10b. The position of the rear exhaust port 50a of the third projector 10c is set appropriately in accordance with the configuration of the rotating plate 94, etc., which will be described later. The rear exhaust port 50a can exhaust air flowing by driving the exhaust fan 85c in the -X direction.

[0157] 23 shows the first side surface 20d of the third projector 10c. A first side surface exhaust port 50b and a first side surface connection unit 60b are arranged on the first side surface 20d of the third projector 10c. The first side surface connection unit 60b of the third projector 10c has the same configuration as the first side surface connection unit 60b of the second projector 10b.

[0158] The first side surface exhaust port 50b is disposed on the second unit surface S2 of the second exhaust unit 91b. The first side surface exhaust port 50b is disposed in a position on the first side surface 20d in the -X direction. The position of the first side surface exhaust port 50b of the third projector 10c is disposed in a position on the -X direction further than the position of the first side surface exhaust port 50b of the second projector 10b. The position of the first side surface exhaust port 50b of the third projector 10c is set appropriately in accordance with the configuration of the rotating plate 94, etc., which will be described later. The first side surface exhaust port 50b can exhaust air flowing due to the driving of the exhaust fan 85c in the +Y direction.

[0159] Fig. 24 shows a block configuration of the projector 10. Fig. 24 shows a block configuration of a third projector 10c which is an example of the projector 10. The third projector 10c includes an operation panel 23, an image projection device 30, a rear connection unit 60a, a first side connection unit 60b, a third exhaust mechanism 80c which is an example of the exhaust mechanism 80, a control unit 100, and a connection detection unit 110.

[0160] The third exhaust mechanism 80c adjusts the flow rate and exhaust direction of air exhausted from the exterior housing 20. The third exhaust mechanism 80c is driven under the control of the control unit 100. The third exhaust mechanism 80c has an exhaust fan 85c and a second exhaust unit 91b.

[0161] The exhaust fan 85c is driven under the control of the airflow control section 103 of the control unit 100. By driving the exhaust fan 85c, the flow rate of air flowing through the second housing internal flow path 81b is adjusted.

[0162] The second exhaust unit 91b opens and closes the rear exhaust port 50a and the first side exhaust port 50b. The second exhaust unit 91b adjusts the exhaust direction of air discharged from the exterior housing 20 by opening and closing the rear exhaust port 50a and the first side exhaust port 50b. The second exhaust unit 91b is driven under the control of the airflow control unit 103. The second exhaust unit 91b has a rotating plate 94, a rotating shaft 95, and a rotating motor 95m. The second exhaust unit 91b corresponds to an example of an opening and closing mechanism.

[0163] The rotating plate 94 is a member that opens and closes the rear exhaust port 50a and the first side exhaust port 50b. The rotating plate 94 rotates when driven by a rotation motor 95m. The rotating plate 94 rotates to block the rear exhaust port 50a or the first side exhaust port 50b. The rotating plate 94 corresponds to an example of an opening and closing member.

[0164] The rotation shaft 95 is an axis that serves as the rotation center of the rotation plate 94. The rotation shaft 95 is arranged parallel or approximately parallel to the Z axis. The rotation shaft 95 supports the rotation plate 94 and rotates the rotation plate 94 by a driving force from a rotation motor 95m.

[0165] The rotation motor 95m generates a driving force to rotate the rotation plate 94. The rotation direction, rotation amount, etc. of the rotation motor 95m are controlled by the airflow control unit 103. By controlling the rotation direction, the rotation direction of the rotation plate 94 is controlled. By controlling the rotation amount, the stop position of the rotation plate 94 is controlled.

[0166] The control unit 100 of the third projector 10c controls each unit such as the third exhaust mechanism 80c. The airflow control unit 103 controls the driving of the second exhaust unit 91b. By controlling the driving of the second exhaust unit 91b, the airflow control unit 103 adjusts the exhaust direction in which air is exhausted from the exterior housing 20. Based on a detection signal transmitted from the connection detection unit 110, the airflow control unit 103 controls the driving of the second exhaust unit 91b and adjusts the exhaust direction of the air.

[0167] 25, 26, and 27 show a schematic configuration of the exhaust unit 91. Figures 25, 26, and 27 show a schematic configuration of a second exhaust unit 91b, which is an example of the exhaust unit 91. The second exhaust unit 91b has a rotating plate 94, a rotating shaft 95, and a rotating motor 95m.

[0168] 25 shows the state in which the rotating plate 94 has moved to a position facing the first side exhaust port 50b. When the rotating plate 94 has moved to a position facing the first side exhaust port 50b, the rotating plate 94 is positioned in line with the first side exhaust port 50b. The rotating plate 94 completely blocks the first side exhaust port 50b. When the rotating plate 94 has moved to a position facing the first side exhaust port 50b, the rotating plate 94 opens the rear exhaust port 50a and closes the first side exhaust port 50b.

[0169] When the connection detection unit 110 detects that the rear input connector 61a is connected to the first connection cable 201a, it sends a first detection signal to the airflow control unit 103. The first detection signal indicates that the rear input connector 61a is connected to the first connection cable 201a. When the airflow control unit 103 receives the first detection signal from the connection detection unit 110, it rotates the rotating plate 94 to a position facing the first side exhaust port 50b but not facing the rear exhaust port 50a. The rotating plate 94 opens the rear exhaust port 50a. When the rotating plate 94 opens the rear exhaust port 50a, air from the second housing internal flow path 81b passes through the rear exhaust port 50a and is discharged to the outside of the exterior housing 20. The air from the second housing internal flow path 81b is not discharged from the first side exhaust port 50b. The air from the second housing internal flow path 81b is discharged in the -X direction of the rear surface 20e.

[0170] 26 shows the state in which the rotating plate 94 has moved to a position facing the rear exhaust port 50a. When the rotating plate 94 has moved to a position facing the rear exhaust port 50a, the rotating plate 94 is positioned along the rear exhaust port 50a. The rotating plate 94 completely blocks the rear exhaust port 50a. When the rotating plate 94 has moved to a position facing the rear exhaust port 50a, the rotating plate 94 opens the first side exhaust port 50b and closes the rear exhaust port 50a.

[0171] When the connection detection unit 110 detects that the first side input connector 61b is connected to the second connection cable 201b, it sends a second detection signal to the airflow control unit 103. The second detection signal indicates that the first side input connector 61b is connected to the second connection cable 201b. Upon receiving the second detection signal from the connection detection unit 110, the airflow control unit 103 rotates the rotating plate 94 to a position facing the rear exhaust port 50a but not facing the first side exhaust port 50b. The rotating plate 94 opens the first side exhaust port 50b. When the rotating plate 94 opens the first side exhaust port 50b, air from the second housing internal flow path 81b passes through the first side exhaust port 50b and is discharged to the outside of the exterior housing 20. The air from the second housing internal flow path 81b is not discharged from the rear exhaust port 50a. The air from the second housing internal flow path 81b is discharged in the +Y direction of the first side surface 20d.

[0172] 27 shows a state in which the rotating plate 94 has moved to a position where it does not face the rear exhaust port 50a and the first side exhaust port 50b. The rotating plate 94 is positioned away from the rear exhaust port 50a and the first side exhaust port 50b. The rotating plate 94 does not block the rear exhaust port 50a and the first side exhaust port 50b. When the rotating plate 94 has moved to a position where it does not face the rear exhaust port 50a and the first side exhaust port 50b, the rotating plate 94 opens the rear exhaust port 50a and the first side exhaust port 50b.

[0173] When the connection detection unit 110 detects that the rear input connector 61a is connected to the first connection cable 201a, it sends a first detection signal to the airflow control unit 103. When the connection detection unit 110 detects that the first side input connector 61b is connected to the second connection cable 201b, it sends a second detection signal to the airflow control unit 103. When the airflow control unit 103 receives the first and second detection signals from the connection detection unit 110, it rotates the rotating plate 94 to a position where it does not face the rear exhaust port 50a and the first side exhaust port 50b. The rotating plate 94 opens the rear exhaust port 50a and the first side exhaust port 50b. When the rotating plate 94 opens the rear exhaust port 50a, air from the second housing internal flow path 81b passes through the rear exhaust port 50a and is discharged to the outside of the exterior housing 20. Furthermore, air from the second housing internal flow path 81b passes through the first side exhaust port 50b and is discharged to the outside of the exterior housing 20. The air from the second housing internal flow path 81b is discharged from the first side surface exhaust port 50b and the rear surface exhaust port 50a. The air from the second housing internal flow path 81b is discharged in the +Y direction of the first side surface 20d and in the -X direction of the rear surface 20e.

[0174] Preferably, the rotation motor 95m rotates the rotation plate 94. The third projector 10c has a simple configuration and is capable of adjusting the exhaust direction.

[0175] Fourth embodiment The fourth embodiment shows a fourth projector 10d that includes an exhaust unit 91 having two exhaust ports 50, and a connection unit 60 that is divided into multiple parts. The exhaust unit 91 has a rear exhaust port 50a and a first side exhaust port 50b. The connection unit 60 is divided into a rear connection unit 60a and a first side connection unit 60b. The fourth projector 10d includes a fourth exhaust mechanism 80d instead of the second exhaust mechanism 80b included in the second projector 10b. The configuration of the fourth projector 10d is the same as the configuration of the second projector 10b, except for the exhaust mechanism 80.

[0176] 28 and 29 show the external configuration of the projector 10. FIGS. 28 and 29 show the external configuration of a fourth projector 10d, which is an example of the projector 10. The fourth projector 10d has a third exhaust unit 91c instead of the first exhaust unit 91a of the second projector 10b. The positions of the rear exhaust port 50a and the first side exhaust port 50b provided in the third exhaust unit 91c are different from the positions of the rear exhaust port 50a and the first side exhaust port 50b provided in the first exhaust unit 91a. The external configuration of the fourth projector 10d is the same as the external configuration of the second projector 10b, except for the positions of the rear exhaust port 50a and the first side exhaust port 50b.

[0177] 28 shows the rear surface 20e of the fourth projector 10d. A rear exhaust port 50a, a second rear exhaust port 50c, and a rear connection unit 60a are arranged on the rear surface 20e of the fourth projector 10d. The second rear exhaust port 50c and rear connection unit 60a of the fourth projector 10d have the same configuration as the second rear exhaust port 50c and rear connection unit 60a of the second projector 10b.

[0178] The rear exhaust port 50a is disposed on the first unit surface S1 of the third exhaust unit 91c. The rear exhaust port 50a is disposed in the +Y direction of the rear surface 20e. The rear exhaust port 50a is disposed in the +Z direction of the rear surface 20e. The position of the rear exhaust port 50a is set appropriately in accordance with the configuration of the slide unit 96, which will be described later, and the like. The rear exhaust port 50a can exhaust air flowing in the -X direction when the exhaust fan 85c is driven.

[0179] 29 shows the first side surface 20d of the fourth projector 10d. A first side surface exhaust port 50b and a first side surface connection unit 60b are arranged on the first side surface 20d of the fourth projector 10d. The first side surface connection unit 60b of the fourth projector 10d has the same configuration as the first side surface connection unit 60b of the second projector 10b.

[0180] The first side surface exhaust port 50b is disposed on the second unit surface S2 of the third exhaust unit 91c. The first side surface exhaust port 50b is disposed in the -X direction of the first side surface 20d. The first side surface exhaust port 50b is disposed in the +Z direction of the first side surface 20d. The position of the first side surface exhaust port 50b is set appropriately in accordance with the configuration of the slide unit 96, which will be described later, and the like. The first side surface exhaust port 50b can exhaust air flowing in the +Y direction when the exhaust fan 85c is driven.

[0181] Fig. 30 shows a block configuration of the projector 10. Fig. 30 shows a block configuration of a fourth projector 10d, which is an example of the projector 10. The fourth projector 10d includes an operation panel 23, an image projection device 30, a rear connection unit 60a, a first side connection unit 60b, a fourth exhaust mechanism 80d, which is an example of the exhaust mechanism 80, a control unit 100, and a connection detection unit 110.

[0182] The fourth exhaust mechanism 80d adjusts the flow rate and exhaust direction of air exhausted from the exterior housing 20. The fourth exhaust mechanism 80d is driven under the control of the control unit 100. The fourth exhaust mechanism 80d has an exhaust fan 85c and a third exhaust unit 91c.

[0183] The exhaust fan 85c is driven under the control of the airflow control section 103 of the control unit 100. By driving the exhaust fan 85c, the flow rate of air flowing through the second housing internal flow path 81b is adjusted.

[0184] The third exhaust unit 91c opens and closes the rear exhaust port 50a and the first side exhaust port 50b. The third exhaust unit 91c adjusts the exhaust direction of air exhausted from the exterior housing 20 by opening and closing the rear exhaust port 50a and the first side exhaust port 50b. The third exhaust unit 91c is driven under the control of the airflow control unit 103. The third exhaust unit 91c has a slide unit 96, a slide drive mechanism 97, and a slide drive motor 97m. The third exhaust unit 91c corresponds to an example of an opening and closing mechanism.

[0185] The slide unit 96 opens and closes the rear exhaust port 50a and the first side exhaust port 50b. The slide unit 96 slides using a slide drive mechanism 97 and a slide drive motor 97m. The slide unit 96 slides to cover at least one of the rear exhaust port 50a and the first side exhaust port 50b. The slide unit 96 corresponds to an example of an opening / closing member.

[0186] The slide drive mechanism 97 slides the slide unit 96. The slide drive mechanism 97 uses a driving force from a slide drive motor 97m to slide the slide unit 96. The slide drive mechanism 97 slides the slide unit 96 based on the control of the airflow control unit 103.

[0187] The slide drive motor 97m generates a drive force that slides the slide unit 96. The rotation direction, rotation amount, etc. of the slide drive motor 97m are controlled by the airflow control unit 103. By controlling the rotation direction, the movement direction of the slide unit 96 is controlled. By controlling the rotation amount, the stop position of the slide unit 96 is controlled.

[0188] The control unit 100 of the fourth projector 10d controls each unit such as the fourth exhaust mechanism 80d. The airflow control unit 103 controls the driving of the third exhaust unit 91c. By controlling the driving of the third exhaust unit 91c, the airflow control unit 103 adjusts the exhaust direction in which air is exhausted from the exterior housing 20. Based on a detection signal transmitted from the connection detection unit 110, the airflow control unit 103 controls the driving of the third exhaust unit 91c and adjusts the exhaust direction of the air.

[0189] Figures 31, 32, and 33 show the schematic configuration of the exhaust unit 91. Figures 31, 32, and 33 show, in exploded views, the schematic configuration of a third exhaust unit 91c, which is an example of the exhaust unit 91. Figures 31, 32, and 33 show the configuration of the third exhaust unit 91c as seen from the inside, with the first unit surface S1 and the second unit surface S2 exploded. Figures 31, 32, and 33 show the rear exhaust port 50a, the first side exhaust port 50b, the slide unit 96, and the slide drive mechanism 97.

[0190] The slide unit 96 covers either the rear exhaust port 50a or the first side exhaust port 50b. The slide unit 96 is configured to be slidable. The slide unit 96 has a first slide plate 96a and a second slide plate 96b.

[0191] The first sliding plate 96a is disposed along the first unit surface S1. The first sliding plate 96a slides in the +Z direction or the -Z direction along the first unit surface S1. The first sliding plate 96a opens and closes the rear exhaust port 50a.

[0192] The second sliding plate 96b is disposed along the second unit surface S2. The second sliding plate 96b slides in the +Z direction or the -Z direction along the second unit surface S2. The second sliding plate 96b opens and closes the first side surface exhaust port 50b.

[0193] The slide drive mechanism 97 slides a first slide plate 96a and a second slide plate 96b included in the slide unit 96. The slide drive mechanism 97 is connected to the first slide plate 96a and the second slide plate 96b, and slides the first slide plate 96a and the second slide plate 96b in conjunction with each other. The slide drive mechanism 97 has a slide drive gear 97a and a slide drive transmission member 97b.

[0194] The slide drive gear 97a transmits the driving force generated by the slide drive motor 97m to the slide drive transmission member 97b. The slide drive gear 97a may be disposed on the rotation shaft of the slide drive motor 97m, or may be connected to the rotation shaft via a belt or a group of gears. The slide drive gear 97a rotates in one direction or in another direction opposite to the one direction.

[0195] The slide drive transmission member 97b slides the first slide plate 96a and the second slide plate 96b. The slide drive transmission member 97b meshes with the slide drive gear 97a and transmits the driving force. When the slide drive gear 97a rotates in one direction, the first slide plate 96a moves in the -Z direction and the second slide plate 96b moves in the +Z direction. When the slide drive gear 97a rotates in the other direction, the first slide plate 96a moves in the +Z direction and the second slide plate 96b moves in the -Z direction.

[0196] The slide drive motor 97m transmits a driving force to the slide drive gear 97a. By transmitting the driving force, the slide drive motor 97m slides the slide unit 96 including the first slide plate 96a and the second slide plate 96b. The slide drive motor 97m moves the first slide plate 96a included in the slide unit 96 along the rear exhaust port 50a. The slide drive motor 97m moves the second slide plate 96b included in the slide unit 96 along the first side exhaust port 50b. The slide drive motor 97m corresponds to an example of a motor.

[0197] 31 shows a state in which the first sliding plate 96a has moved to a position where it does not face the rear exhaust port 50a. The first sliding plate 96a opens the rear exhaust port 50a. When the first sliding plate 96a opens the rear exhaust port 50a, air from the second housing internal flow path 81b passes through the rear exhaust port 50a and is discharged to the outside of the exterior housing 20.

[0198] When the first sliding plate 96a moves to a position not facing the rear exhaust port 50a, the second sliding plate 96b moves to a position facing the first side exhaust port 50b. The second sliding plate 96b closes the first side exhaust port 50b. When the second sliding plate 96b closes the first side exhaust port 50b, air from the second housing internal flow path 81b is not discharged from the first side exhaust port 50b.

[0199] When the connection detection unit 110 detects that the rear input connector 61a is connected to the first connection cable 201a, it sends a first detection signal to the airflow control unit 103. The first detection signal is a signal indicating that the rear input connector 61a is connected to the first connection cable 201a. When the airflow control unit 103 receives the first detection signal from the connection detection unit 110, it drives the slide unit 96. The airflow control unit 103 moves the second slide plate 96b to a position facing the first side air outlet 50b. The airflow control unit 103 moves the first slide plate 96a to a position not facing the rear air outlet 50a. The first slide plate 96a opens the rear air outlet 50a. The second slide plate 96b closes the first side air outlet 50b. When the first sliding plate 96a opens the rear exhaust port 50a, air from the second housing internal flow path 81b passes through the rear exhaust port 50a and is discharged to the outside of the exterior housing 20. The air from the second housing internal flow path 81b is not discharged from the first side exhaust port 50b. The air from the second housing internal flow path 81b is discharged in the -X direction of the rear surface 20e.

[0200] 32 shows a state in which the first sliding plate 96a has moved to a position facing the rear exhaust port 50a. The first sliding plate 96a closes the rear exhaust port 50a. When the first sliding plate 96a closes the rear exhaust port 50a, air from the second housing internal flow path 81b is not discharged through the rear exhaust port 50a.

[0201] When the first sliding plate 96a moves to a position facing the rear exhaust port 50a, the second sliding plate 96b moves to a position not facing the first side exhaust port 50b. The second sliding plate 96b opens the first side exhaust port 50b. When the second sliding plate 96b opens the first side exhaust port 50b, air from the second housing internal flow path 81b passes through the first side exhaust port 50b and is discharged to the outside of the exterior housing 20.

[0202] When the connection detection unit 110 detects that the first side input connector 61b is connected to the second connection cable 201b, it sends a second detection signal to the airflow control unit 103. The second detection signal is a signal indicating that the first side input connector 61b is connected to the second connection cable 201b. When the airflow control unit 103 receives the second detection signal from the connection detection unit 110, it drives the slide unit 96. The airflow control unit 103 moves the second slide plate 96b to a position where it does not face the first side exhaust port 50b. The airflow control unit 103 moves the first slide plate 96a to a position where it faces the rear exhaust port 50a. The first slide plate 96a closes the rear exhaust port 50a. The second slide plate 96b opens the first side exhaust port 50b. When the second sliding plate 96b opens the first side surface exhaust port 50b, air from the second housing internal flow path 81b passes through the first side surface exhaust port 50b and is discharged to the outside of the exterior housing 20. The air from the second housing internal flow path 81b is not discharged from the rear surface exhaust port 50a. The air from the second housing internal flow path 81b is discharged in the +Y direction of the first side surface 20d.

[0203] 33 shows a state in which the first sliding plate 96a has moved to a position where it does not face a portion of the rear exhaust port 50a. The first sliding plate 96a opens a portion of the rear exhaust port 50a. When the first sliding plate 96a opens a portion of the rear exhaust port 50a, air from the second housing internal flow path 81b passes through the rear exhaust port 50a and is discharged to the outside of the exterior housing 20.

[0204] When the first sliding plate 96a moves to a position where it does not face a portion of the rear exhaust port 50a, the second sliding plate 96b moves to a position where it does not face a portion of the first side exhaust port 50b. The second sliding plate 96b opens a portion of the first side exhaust port 50b. When the second sliding plate 96b opens a portion of the first side exhaust port 50b, air from the second housing internal flow path 81b passes through the first side exhaust port 50b and is discharged to the outside of the exterior housing 20.

[0205] When the connection detection unit 110 detects that the rear input connector 61a is connected to the first connection cable 201a, it sends a first detection signal to the airflow control unit 103. When the connection detection unit 110 detects that the first side input connector 61b is connected to the second connection cable 201b, it sends a second detection signal to the airflow control unit 103. When the airflow control unit 103 receives the first detection signal and the second detection signal from the connection detection unit 110, it drives the slide unit 96. The airflow control unit 103 moves a portion of the first slide plate 96a to a position where it does not face the rear exhaust port 50a. When a portion of the first slide plate 96a moves to a position where it does not face the rear exhaust port 50a, the second slide plate 96b moves to a position where it does not face the first side exhaust port 50b. The first slide plate 96a opens a portion of the rear exhaust port 50a. The second slide plate 96b opens a portion of the first side exhaust port 50b. The air from the second housing internal flow path 81b passes through the rear exhaust port 50a and the first side surface exhaust port 50b and is discharged to the outside of the exterior housing 20. The air from the second housing internal flow path 81b is discharged in the −X direction of the rear surface 20e and in the +Y direction of the first side surface 20d.

[0206] Fifth embodiment The fifth embodiment illustrates a fifth projector 10e that includes multiple air intakes 40, one air exhaust 50, and multiple divided connection units 60. The multiple air intakes 40 include a rear air intake 40a and a first side air intake 40b. The connection unit 60 is divided into a rear connection unit 60a and a first side connection unit 60b.

[0207] Fig. 34 shows a schematic configuration of the projector 10. Fig. 34 shows a schematic configuration of a fifth projector 10e, which is an example of the projector 10. Fig. 34 shows the fifth projector 10e as seen from the +Z direction. Fig. 34 shows the rear air intake 40a, the first side air intake 40b, the rear connection unit 60a, the first side connection unit 60b, and the third housing internal flow path 81c. The first side surface 20d, the rear surface 20e, the operation panel 23, the image projection device 30, the rear connection unit 60a, and the first side connection unit 60b of the fifth projector 10e are the same as the first side surface 20d, the rear surface 20e, the operation panel 23, the image projection device 30, the rear connection unit 60a, and the first side connection unit 60b of the first projector 10a.

[0208] The rear air intake port 40a is an opening configured to allow air to pass through inside the exterior housing 20. The rear air intake port 40a is provided on the rear surface 20e. The rear air intake port 40a draws in air from the space in the -X direction of the rear surface 20e. The rear air intake port 40a corresponds to an example of a first air vent. The rear surface 20e on which the rear air intake port 40a is arranged corresponds to an example of a first surface.

[0209] The first side surface air intake 40b is an opening configured to allow air to pass through inside the exterior housing 20. The first side surface air intake 40b is provided on the first side surface 20d. The first side surface air intake 40b takes in air from the space in the +Y direction of the first side surface 20d. The air inflow direction of the first side surface air intake 40b is different from the air inflow direction of the rear surface air intake 40a. The first side surface air intake 40b corresponds to an example of a second air vent. The first side surface 20d on which the first side surface air intake 40b is arranged corresponds to an example of a second surface.

[0210] The third housing internal flow path 81c is an example of the housing internal flow path 81. The third housing internal flow path 81c circulates air that has flowed in through the rear intake port 40a and the first side intake port 40b. The air flowing through the third housing internal flow path 81c cools the entire image projection device 30, or the light source unit 31, the image forming unit 35, and the like included in the image projection device 30. The third housing internal flow path 81c is, for example, configured as a duct through which air can flow. The configuration of the third housing internal flow path 81c is not limited as long as it is configured so that air can flow through it. The third housing internal flow path 81c corresponds to an example of an airflow path. A rear intake fan 85d and a first side intake fan 85e are provided in the third housing internal flow path 81c. An exhaust fan 85c may also be provided in the third housing internal flow path 81c.

[0211] The rear intake fan 85d draws air from the rear intake port 40a into the third housing internal flow path 81c. The rear intake fan 85d is an example of a fan 85. The rear intake fan 85d is arranged in a flow path connected to the rear intake port 40a. When the rear intake fan 85d is driven, the rear intake port 40a draws air into the third housing internal flow path 81c.

[0212] The first side surface intake fan 85e draws air from the first side surface intake port 40b into the third housing internal flow path 81c. The first side surface intake fan 85e is an example of a fan 85. The first side surface intake fan 85e is arranged in a flow path connected to the first side surface intake port 40b. When the first side surface intake fan 85e is driven, the first side surface intake port 40b draws air into the third housing internal flow path 81c.

[0213] The projector 10 drives at least one of the rear intake fan 85d and the first side intake fan 85e to draw air into the third housing flow path 81c. The projector 10 can control the air inflow direction by controlling the driving of the rear intake fan 85d and the first side intake fan 85e.

[0214] By user operation, the rear input connector 61a is connected to the first connection cable 201a connected to the external device. The connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 transmits a first detection signal to the control unit 100 indicating that the rear input connector 61a has been connected to the external device.

[0215] The control unit 100 receives the first detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the rear intake fan 85d and the first side intake fan 85e based on the first detection signal. The airflow control unit 103 drives the rear intake fan 85d and stops the first side intake fan 85e. When the rear intake fan 85d is driven, air passes through the rear intake port 40a and flows into the exterior housing 20. The rear intake port 40a draws air into the third housing internal flow path 81c. The fifth projector 10e draws in air from the -X direction of the rear face 20e. The air from the -X direction of the rear face 20e is unlikely to have been heated by another device. This makes it possible to prevent a decrease in cooling capacity due to the inflowing air.

[0216] By user operation, the first side input connector 61b is connected to the second connection cable 201b connected to the external device. The connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 transmits a second detection signal to the control unit 100 indicating that the first side input connector 61b has been connected to the external device.

[0217] The control unit 100 receives the second detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the first side intake fan 85e and the rear intake fan 85d based on the second detection signal. The airflow control unit 103 drives the first side intake fan 85e and stops the rear intake fan 85d. When the first side intake fan 85e is driven, air passes through the first side intake port 40b and flows into the exterior housing 20. The first side intake port 40b draws air into the third housing internal flow path 81c. The fifth projector 10e draws in air in the +Y direction of the first side surface 20d. The air in the +Y direction of the first side surface 20d is unlikely to have been heated by another device. This makes it possible to prevent a decrease in cooling capacity due to the inflowing air.

[0218] It is preferable that the rear air intake port 40a and the first side air intake port 40b take air into the third housing internal flow path 81c. The fifth projector 10e can allow air that is unlikely to have been heated by another device to flow into the exterior housing 20.

[0219] Sixth embodiment The sixth embodiment shows a sixth projector 10f including a connector pivot unit 150 having a plurality of exhaust ports 50 and a connection unit 60. The plurality of exhaust ports 50 include a rear exhaust port 50a and a first side exhaust port 50b.

[0220] Fig. 35 shows a schematic configuration of the projector 10. Fig. 35 shows a schematic configuration of a sixth projector 10f, which is an example of the projector 10. Fig. 35 shows the sixth projector 10f as seen from the +Z direction. Fig. 35 shows the first side surface 20d, the rear surface 20e, the operation panel 23, the image projection device 30, the air intake 40, the rear exhaust vent 50a, the first side exhaust vent 50b, the fourth housing internal flow path 81d, and the connector rotation unit 150. The first side surface 20d, the rear surface 20e, the image projection device 30, the air intake 40, the rear exhaust vent 50a, and the first side exhaust vent 50b of the sixth projector 10f are the same as the first side surface 20d, the rear surface 20e, the image projection device 30, the air intake 40, the rear exhaust vent 50a, and the first side exhaust vent 50b of the first projector 10a. The operation panel 23 of the sixth projector 10f is located in a different position from the operation panel 23 of the first projector 10a, but has the same function.

[0221] The fourth housing internal flow path 81d is an example of the housing internal flow path 81. The fourth housing internal flow path 81d is a path that connects the intake port 40 and the multiple exhaust ports 50 and allows air to circulate. The fourth housing internal flow path 81d branches into a back path 81r and a side path 81s. An exhaust fan 85c and a flap 98 are arranged in the fourth housing internal flow path 81d.

[0222] The rear path 81r is a branch path of the fourth housing internal flow path 81d. The rear path 81r is connected to the rear exhaust port 50a. The rear path 81r circulates the air discharged from the rear exhaust port 50a.

[0223] The side path 81s is a branch path of the fourth internal housing flow path 81d. The side path 81s is connected to the first side surface exhaust port 50b. The side path 81s circulates the air discharged from the first side surface exhaust port 50b.

[0224] The exhaust fan 85c causes the air in the fourth housing internal flow path 81d to flow. The exhaust fan 85c is arranged in a path different from the rear path 81r and the side path 81s. The exhaust fan 85c causes the air to flow toward the rear path 81r and the side path 81s. The position where the exhaust fan 85c is arranged is set appropriately.

[0225] The flap 98 switches the air flow path to at least one of the rear path 81r and the side path 81s. The flap 98 is disposed at a branching position of the rear path 81r and the side path 81s. The flap 98 rotates based on the control of the airflow control unit 103. By rotating, the flap 98 switches the air flow path.

[0226] The connector rotation unit 150 includes a power supply unit 70. The connector rotation unit 150 may include a connection unit 60. The connector rotation unit 150 rotates the power supply unit 70. The connector rotation unit 150 includes a connector arrangement surface S3. The connector arrangement surface S3 corresponds to an example of a connection surface. The power supply terminals 71 included in the power supply unit 70 are arranged on the connector arrangement surface S3. The connector rotation unit 150 rotates around a unit rotation axis 151 that is parallel or approximately parallel to the Z axis. The connector rotation unit 150 can switch the connector arrangement surface S3 between a rear connection position P1 along the rear surface 20e and a first side surface connection position P2 along the first side surface 20d. The connector rotation unit 150 corresponds to an example of a pivotal connection member. The rear connection position P1 corresponds to an example of a first connection position. The first side surface connection position P2 corresponds to an example of a second connection position.

[0227] 36 and 37 show a schematic configuration of the connector rotation unit 150. Fig. 36 shows the external configuration of a connector arrangement surface S3 provided on the connector rotation unit 150. A power terminal 71 included in the power supply unit 70 and a connector 61 included in the connection unit 60 are arranged on the connector arrangement surface S3. The connector rotation unit 150 has a unit rotation shaft 151.

[0228] The power terminal 71 is arranged so that the power cable 211 can be connected from a direction perpendicular to the connector arrangement surface S3. When a space is secured in which the power cable 211 can be arranged in a direction perpendicular to the connector arrangement surface S3, the power terminal 71 can be connected to the power cable 211. The power terminal 71 corresponds to an example of a connection terminal.

[0229] The connector 61 is arranged so that the connection cable 201 can be connected from a direction perpendicular to the connector arrangement surface S3. When a space is secured in which the connection cable 201 can be arranged in a direction perpendicular to the connector arrangement surface S3, the connector 61 can be connected to the connection cable 201. The connector 61 corresponds to an example of a connection terminal.

[0230] 36 has a power terminal 71 and a connector 61 arranged therein, but is not limited to this. Either the power terminal 71 or the connector 61 may be arranged in the connector rotating unit 150. It is preferable that the power terminal 71 and the connector 61 are arranged in the connector rotating unit 150.

[0231] The unit rotation shaft 151 rotatably supports the connector rotation unit 150. The unit rotation shaft 151 supports the connector arrangement surface S3 so that it can be switched between a rear surface connecting position P1 and a first side surface connecting position P2. The unit rotation shaft 151 is hollow.

[0232] Fig. 37 shows the internal configuration of the connector rotation unit 150. The connector rotation unit 150 has a wiring path 155 therein. The wiring path 155 shown in Fig. 37 extends in the -Z direction, but is not limited to this. The wiring path 155 may also extend in the +Z direction.

[0233] The wiring path 155 is a path along which an internal power cable connected to the power terminal 71, an internal wiring cable connected to the connector 61, etc. can be arranged. The wiring path 155 connects to the connection unit 60 and the power supply unit 70. The wiring path 155 connects to the hollow portion of the unit rotation shaft 151. The various cables arranged within the wiring path 155 are connected to the control unit 100, etc. within the exterior housing 20.

[0234] Fig. 38 shows a block configuration of the projector 10. Fig. 38 shows a block configuration of a sixth projector 10f which is an example of the projector 10. The sixth projector 10f includes an operation panel 23, an image projection device 30, a fifth exhaust mechanism 80e which is an example of the exhaust mechanism 80, a control unit 100, a connection detection unit 110, a connector rotation unit 150, and a rotation direction detection unit 170.

[0235] The fifth exhaust mechanism 80e adjusts the flow rate and exhaust direction of air exhausted from the exterior housing 20. The fifth exhaust mechanism 80e is driven under the control of the control unit 100. The fifth exhaust mechanism 80e has an exhaust fan 85c, a flap 98, and a flap drive motor 98m.

[0236] The flap 98 adjusts the flow direction of air flowing through the fourth housing internal flow path 81d. The flap 98 adjusts the exhaust direction of air by adjusting the flow direction of air. The flap 98 is rotated by a flap drive motor 98m. The flap 98 can rotate to block either the rear path 81r or the side path 81s. The flap 98 corresponds to an example of an opening / closing member.

[0237] The flap drive motor 98m generates a drive force that rotates the flap 98. The direction of rotation, amount of rotation, etc. of the flap drive motor 98m are controlled by the airflow control unit 103. By controlling the direction of rotation, the direction of rotation of the flap 98 is controlled. By controlling the amount of rotation, the stopping position of the flap 98 is controlled.

[0238] The control unit 100 of the sixth projector 10f controls each unit such as the fifth exhaust mechanism 80e. The airflow control unit 103 controls the driving of the flap 98. By controlling the driving of the flap 98, the airflow control unit 103 adjusts the exhaust direction in which air is exhausted from the exterior housing 20. The airflow control unit 103 controls the driving of the flap 98 and adjusts the exhaust direction of air based on a detection signal transmitted from the connection detection unit 110 and a position detection signal transmitted from the rotation direction detection unit 170.

[0239] The connection detection unit 110 detects that the power terminal 71 is connected to the power cable 211. The power cable 211 is connected to a power source. When the power terminal 71 is connected to the power cable 211 that is connected to the power source, a current flows to the power supply unit 70. As an example, the connection detection unit 110 detects that a current is flowing to the power supply unit 70. The connection detection unit 110 detects that the power terminal 71 is connected to the power cable 211 by detecting that a current is flowing to the power supply unit 70. The connection detection unit 110 may be configured with a mechanical switch or the like that detects that the power cable 211 is connected. The connection detection unit 110 may also detect that the connector 61 is connected to the connection cable 201.

[0240] The connector rotation unit 150 switches the positions of the power terminal 71 and the connector 61 between the rear connection position P1 and the first side connection position P2. The connector rotation unit 150 includes a connection unit 60, a power supply unit 70, and a unit rotation mechanism 157.

[0241] The unit rotation mechanism 157 rotates the connector arrangement surface S3. The unit rotation mechanism 157 rotates the connector arrangement surface S3 to the rear connection position P1 or the first side connection position P2. The unit rotation mechanism 157 rotates the connector arrangement surface S3 based on the control of the control unit 100.

[0242] The rotation direction detection unit 170 detects the position of the connector arrangement surface S3. The rotation direction detection unit 170 is configured with an optical sensor, a mechanical sensor, or the like. As an example, when the connector arrangement surface S3 is located at the rear connection position P1, the rotation direction detection unit 170 transmits a first position detection signal to the control unit 100. The first position detection signal is a signal indicating that the power terminals 71, etc. are located at a position along the rear surface 20e. When the connector arrangement surface S3 is located at the first side surface connection position P2, the rotation direction detection unit 170 transmits a second position detection signal to the control unit 100. The second position detection signal is a signal indicating that the power terminals 71, etc. are located at a position along the first side surface 20d.

[0243] The control unit 100 receives the first position detection signal or the second position detection signal as a position detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the flap 98 based on the first position detection signal and the second position detection signal.

[0244] Fig. 39 shows a schematic configuration of the projector 10. Fig. 39 shows a sixth projector 10f to which a power cable 211 and the like are connected. Fig. 39 shows a state in which the connector rotation unit 150 is located at the rear connection position P1.

[0245] 39 shows a state in which a power cable 211 is connected to the power terminal 71 and a connection cable 201 is connected to the connector 61. When either the power cable 211 or the connection cable 201 is connected, the connection detection unit 110 transmits a detection signal to the control unit 100.

[0246] The rotation direction detection unit 170 detects the position of the connector arrangement surface S3. In the case of Figure 39, the connector arrangement surface S3 is located at a rear connection position P1 along the rear surface 20e. The rotation direction detection unit 170 transmits a first position detection signal to the control unit 100.

[0247] The airflow control unit 103 of the control unit 100 receives the detection signal and the first position detection signal. From the detection signal and the first position detection signal, the control unit 100 can predict that there is space in the -X direction of the rear surface 20e in which the power cable 211 and the like can be placed. If there is space in which the power cable 211 and the like can be placed, it is possible to prevent a decrease in cooling capacity due to the exhausted air. The control unit 100 determines to exhaust air from the rear surface exhaust port 50a.

[0248] When the airflow control unit 103 determines to exhaust air from the rear exhaust port 50a, it drives the flap 98. The airflow control unit 103 rotates the flap 98 to a position where it blocks the side path 81s, as shown in FIG. 39 . When the flap 98 blocks the side path 81s, the air in the fourth housing internal flow path 81d flows into the rear path 81r. The air in the rear path 81r passes through the rear exhaust port 50a and is exhausted to the outside of the exterior housing 20.

[0249] Fig. 40 shows a schematic configuration of the projector 10. Fig. 40 shows a sixth projector 10f to which a power cable 211 and the like are connected. Fig. 40 shows a state in which the connector rotation unit 150 is located at the first side surface connection position P2.

[0250] 40 shows a state in which a power cable 211 is connected to the power terminal 71 and a connection cable 201 is connected to the connector 61. When either the power cable 211 or the connection cable 201 is connected, the connection detection unit 110 transmits a detection signal to the control unit 100.

[0251] The rotation direction detection unit 170 detects the position of the connector arrangement surface S3. In the case of Figure 40, the connector arrangement surface S3 is located at the first side surface connection position P2 along the first side surface 20d. The rotation direction detection unit 170 transmits a second position detection signal to the control unit 100.

[0252] The airflow control unit 103 of the control unit 100 receives the detection signal and the second position detection signal. From the detection signal and the second position detection signal, the control unit 100 can predict that there is space in the +Y direction of the first side surface 20d in which the power cable 211 and the like can be placed. If there is space in which the power cable 211 and the like can be placed, it is possible to prevent a decrease in cooling capacity due to the exhausted air. The control unit 100 determines to exhaust air from the first side surface exhaust port 50b.

[0253] When the airflow control unit 103 determines to exhaust air from the first side surface exhaust port 50b, it drives the flap 98. The airflow control unit 103 rotates the flap 98 to a position where it blocks the rear surface path 81r, as shown in FIG. 40 . When the flap 98 blocks the rear surface path 81r, the air in the fourth housing internal flow path 81d flows into the side surface path 81s. The air in the side surface path 81s passes through the first side surface exhaust port 50b and is exhausted to the outside of the exterior housing 20.

[0254] The sixth projector 10f includes an exterior housing 20 that houses an image projection device 30 and has a back surface 20e and a first side surface 20d, a fourth housing internal flow path 81d that circulates air to cool the image projection device 30, a back exhaust port 50a that is arranged on the back surface 20e and through which the air circulating in the fourth housing internal flow path 81d can pass, a first side surface exhaust port 50b that is arranged on the first side surface 20d and through which the air circulating in the fourth housing internal flow path 81d can pass, a connector rotation unit 150 that has a connector arrangement surface S3 and can switch the position of the connector arrangement surface S3 between a back connection position P1 along the back surface 20e or a first side surface connection position P2 along the first side surface 20d, a power terminal 71 that is arranged on the connector arrangement surface S3, and a connection detection unit 110 that detects that the power terminal 71 is connected to the power cable 211. When the connection detection unit 110 detects that the power terminal 71 is connected to the power cable 211 and the connector arrangement surface S3 is located at the rear connection position P1, air passes through the rear exhaust port 50a. The sixth projector 10f can utilize a space that is not provided with other devices, walls, etc. The sixth projector 10f can suppress a decrease in cooling capacity due to ventilation.

[0255] The rear exhaust port 50a and the first side exhaust port 50b exhaust air flowing through the fourth housing internal flow path 81d to the outside of the exterior housing 20. The sixth projector 10f can suppress a decrease in cooling capacity by discharging the air flowing through the fourth housing internal flow path 81d.

[0256] When the connection detection unit 110 detects that the power terminal 71 is connected to the power cable 211 and the connector arrangement surface S3 is located at the first side surface connection position P2, air passes through the first side surface exhaust port 50b. The sixth projector 10f can utilize the space in the +Y direction of the first side surface 20d, which is free of other devices, walls, and the like.

[0257] The connector arrangement surface S3 of the sixth projector 10f is rotated by, but not limited to, the unit rotation mechanism 157. The connector arrangement surface S3 may also be rotated by a manual operation by the user. The rotation direction detection unit 170 detects the position of the connector arrangement surface S3 rotated by the manual operation.

[0258] The sixth projector 10f includes a fifth exhaust mechanism 80e, but is not limited to this. The fifth exhaust mechanism 80e may be replaced by a first exhaust mechanism 80a or the like. The sixth projector 10f includes a fourth housing internal flow path 81d, but is not limited to this. The fourth housing internal flow path 81d may be replaced by a third housing internal flow path 81c. When the third housing internal flow path 81c is included, a flap 98 or other components are provided in the third housing internal flow path 81c.

[0259] Seventh embodiment The seventh embodiment illustrates a seventh projector 10g including a connection unit 60 divided into multiple parts, and an airflow direction switching unit 180. The connection unit 60 is divided into a rear connection unit 60a and a first side connection unit 60b. The airflow direction switching unit 180 has one exhaust port 50.

[0260] FIG. 41 shows a schematic configuration of the projector 10. FIG. 41 shows a schematic configuration of a seventh projector 10g, which is an example of the projector 10. FIG. 41 shows the seventh projector 10g as seen from the +Z direction. FIG. 41 shows the first side surface 20d, the rear surface 20e, the operation panel 23, the image projection device 30, the air intake 40, the rear surface connection unit 60a, the first side surface connection unit 60b, the fifth housing internal flow path 81e, and the ventilation direction switching unit 180. The first side surface 20d, the rear surface 20e, the operation panel 23, the image projection device 30, the air intake 40, the rear surface connection unit 60a, and the first side surface connection unit 60b of the seventh projector 10g are the same as the first side surface 20d, the rear surface 20e, the operation panel 23, the image projection device 30, the air intake 40, the rear surface connection unit 60a, and the first side surface connection unit 60b of the second projector 10b.

[0261] The fifth housing internal flow path 81e is an example of the housing internal flow path 81. The fifth housing internal flow path 81e connects the air intake port 40 and the airflow direction switching unit 180, and is a path for circulating air to the airflow direction switching unit 180. An exhaust fan 85c is arranged in the fifth housing internal flow path 81e.

[0262] The airflow direction switching unit 180 has an exhaust port 50. The airflow direction switching unit 180 rotates the exhaust port 50. The airflow direction switching unit 180 has an opening arrangement surface S4. The opening arrangement surface S4 corresponds to an example of an airflow surface. The exhaust port 50 is arranged on the opening arrangement surface S4. The airflow direction switching unit 180 has an opening rotation shaft 181 and an internal flow path 183.

[0263] The opening rotation shaft 181 is disposed parallel or approximately parallel to the Z axis. The opening arrangement surface S4 rotates around the opening rotation shaft 181. The ventilation direction switching unit 180 can switch the opening arrangement surface S4 to a rear ventilation position P3 along the rear surface 20e or a first side ventilation position P4 along the first side surface 20d. The ventilation direction switching unit 180 corresponds to an example of a rotatable ventilation member. The rear ventilation position P3 corresponds to an example of the first ventilation position. The first side ventilation position P4 corresponds to an example of the second ventilation position.

[0264] The unit intra-flow path 183 is a path that allows air circulating from the fifth housing intra-flow path 81e to the exhaust port 50. The unit intra-flow path 183 is connected to the fifth housing intra-flow path 81e. The unit intra-flow path 183 is formed, for example, from a flexible member. The configuration of the unit intra-flow path 183 is not limited as long as it is configured to allow air to circulate through the rotating exhaust port 50.

[0265] Fig. 42 shows a block configuration of the projector 10. Fig. 42 shows a block configuration of a seventh projector 10g which is an example of the projector 10. The seventh projector 10g includes an operation panel 23, an image projection device 30, a rear connection unit 60a, a first side connection unit 60b, a sixth exhaust mechanism 80f which is an example of the exhaust mechanism 80, a control unit 100, a connection detection unit 110, and an air flow direction detection unit 190.

[0266] The sixth exhaust mechanism 80f adjusts the flow rate and exhaust direction of air exhausted from the exterior housing 20. The sixth exhaust mechanism 80f is driven under the control of the control unit 100. The sixth exhaust mechanism 80f has an exhaust fan 85c and an airflow direction switching unit 180.

[0267] The ventilation direction switching unit 180 switches the position of the exhaust port 50 between a rear ventilation position P3 and a first side ventilation position P4. The ventilation direction switching unit 180 includes an opening rotation shaft 181, an internal flow path 183, and a switching mechanism 185.

[0268] The switching mechanism 185 rotates the opening arrangement surface S4. The switching mechanism 185 rotates the opening arrangement surface S4 to the rear ventilation position P3 or the first side ventilation position P4. The switching mechanism 185 rotates the opening arrangement surface S4 based on the control of the control unit 100.

[0269] The airflow direction detection unit 190 detects the position of the opening arrangement surface S4. The airflow direction detection unit 190 is composed of an optical sensor, a mechanical sensor, or the like. When the opening arrangement surface S4 is located at the rear airflow position P3, the airflow direction detection unit 190 transmits a first direction detection signal to the control unit 100. The first direction detection signal is a signal indicating that the exhaust port 50 is located at a position along the rear surface 20e. When the opening arrangement surface S4 is located at the first side airflow position P4, the airflow direction detection unit 190 transmits a second direction detection signal to the control unit 100. The second direction detection signal is a signal indicating that the exhaust port 50 is located at a position along the first side surface 20d.

[0270] The control unit 100 receives the first direction detection signal or the second direction detection signal as a direction detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the sixth exhaust mechanism 80f based on the direction detection signal.

[0271] Fig. 43 shows a schematic configuration of the projector 10. Fig. 43 shows a seventh projector 10g in which a first connection cable 201a, which is an example of the connection cable 201, is connected to the rear input connector 61a. The first connection cable 201a is connected to an external device.

[0272] FIG. 43 shows that the seventh projector 10g is arranged so that the first connection cable 201a can be connected to the rear input connector 61a. By providing a space in which the first connection cable 201a can be arranged in the -X direction of the rear surface 20e, the first connection cable 201a can be connected to the rear input connector 61a. By detecting that the first connection cable 201a is connected to the rear input connector 61a, the seventh projector 10g can predict that there is a space in the -X direction of the rear surface 20e from which air can be exhausted. On the other hand, the connection cable 201 is not connected to the first side input connector 61b. The seventh projector 10g cannot predict that there is a space in the +Y direction of the first side surface 20d from which air can be exhausted. The seventh projector 10g determines the exhaust direction by detecting the connector 61 to which the connection cable 201 is connected.

[0273] By user operation, the rear input connector 61a is connected to the first connection cable 201a connected to the external device. The connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. As an example, the connection detection unit 110 detects an electrical signal flowing between the seventh projector 10g and the external device within the rear connection unit 60a. By detecting the electrical signal, the connection detection unit 110 detects that the rear input connector 61a has been connected to the external device. The connection detection unit 110 transmits a first detection signal to the control unit 100 indicating that the rear input connector 61a has been connected to the external device.

[0274] The control unit 100 receives the first detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the airflow direction switching unit 180 based on the first detection signal. The airflow control unit 103 drives the switching mechanism 185 to rotate the airflow direction switching unit 180. The airflow direction switching unit 180 rotates the opening arrangement surface S4 to a rear airflow position P3 along the rear surface 20e.

[0275] The airflow direction detection unit 190 detects the position of the opening arrangement surface S4. The airflow direction detection unit 190 detects that the opening arrangement surface S4 is located at the rear airflow position P3. When the airflow direction detection unit 190 detects that the opening arrangement surface S4 is located at the rear airflow position P3, the airflow direction detection unit 190 transmits a first direction detection signal to the control unit 100.

[0276] The control unit 100 receives the first direction detection signal. The airflow control unit 103 drives the exhaust fan 85c to circulate air within the fifth housing internal flow path 81e. The air within the fifth housing internal flow path 81e passes through the exhaust port 50 and is discharged to the outside of the exterior housing 20. The seventh projector 10g exhausts air in the -X direction of the rear surface 20e. The seventh projector 10g exhausts air in the -X direction of the rear surface 20e, where there is less likely to be other devices, walls, or the like. The seventh projector 10g can suppress a decrease in cooling capacity due to exhaust air.

[0277] Fig. 44 shows a schematic configuration of the projector 10. Fig. 44 shows a seventh projector 10g in which a second connection cable 201b, which is an example of the connection cable 201, is connected to the first side input connector 61b. The second connection cable 201b is connected to an external device.

[0278] FIG. 44 shows that the seventh projector 10g is arranged so that the second connection cable 201b can be connected to the first side input connector 61b. By providing a space in which the second connection cable 201b can be arranged in the +Y direction of the first side surface 20d, the second connection cable 201b can be connected to the first side input connector 61b. By detecting that the second connection cable 201b is connected to the first side input connector 61b, the seventh projector 10g can predict that there is a space in which air can be exhausted in the +Y direction of the first side surface 20d. On the other hand, the connection cable 201 is not connected to the rear input connector 61a. The seventh projector 10g cannot predict that there is a space in which air can be exhausted in the -X direction of the rear surface 20e. The seventh projector 10g determines the exhaust direction by detecting the connector 61 to which the connection cable 201 is connected.

[0279] By user operation, the first side input connector 61b is connected to the second connection cable 201b connected to the external device. The connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. As an example, the connection detection unit 110 detects an electrical signal flowing between the seventh projector 10g and the external device within the first side connection unit 60b. By detecting the electrical signal, the connection detection unit 110 detects that the first side input connector 61b has been connected to the external device. The connection detection unit 110 transmits a second detection signal to the control unit 100 indicating that the first side input connector 61b has been connected to the external device.

[0280] The control unit 100 receives the second detection signal. The airflow control unit 103 of the control unit 100 controls the driving of the airflow direction switching unit 180 based on the second detection signal. The airflow control unit 103 drives the switching mechanism 185 to rotate the airflow direction switching unit 180. The airflow direction switching unit 180 rotates the opening arrangement surface S4 to the first side surface ventilation position P4 along the first side surface 20d.

[0281] The airflow direction detection unit 190 detects the position of the opening arrangement surface S4. The airflow direction detection unit 190 detects that the opening arrangement surface S4 is located at the first side airflow position P4. When the airflow direction detection unit 190 detects that the opening arrangement surface S4 is located at the first side airflow position P4, the airflow direction detection unit 190 transmits a second direction detection signal to the control unit 100.

[0282] The control unit 100 receives the second direction detection signal. The airflow control unit 103 drives the exhaust fan 85c to circulate air within the fifth housing internal flow path 81e. The air within the fifth housing internal flow path 81e passes through the exhaust port 50 and is exhausted to the outside of the exterior housing 20. The seventh projector 10g exhausts air in the +Y direction of the first side surface 20d, where there is little possibility that other devices, walls, etc. are located. The seventh projector 10g can suppress a decrease in cooling capacity due to exhaust.

[0283] The seventh projector 10g includes an exterior housing 20 that houses an image projection device 30 and has a rear surface 20e and a first side surface 20d, a fifth housing internal flow path 81e that circulates air to cool the image projection device 30, a rear input connector 61a arranged on the rear surface 20e, a first side input connector 61b arranged on the first side surface 20d, an airflow direction switching unit 180 that has an opening arrangement surface S4 and can switch the position of the opening arrangement surface S4 between a rear ventilation position P3 along the rear surface 20e and a first side ventilation position P4 along the first side surface 20d, an exhaust port 50 arranged on the opening arrangement surface S4, and a connection detection unit 110 that detects connection of the rear input connector 61a with the first connection cable 201a. When the connection detection unit 110 detects connection of the rear input connector 61a with the first connection cable 201a and the opening arrangement surface S4 is positioned in the rear ventilation position P3, air passes through the exhaust port 50. The seventh projector 10g can utilize a space that is free of other devices, walls, etc. The seventh projector 10g can prevent a decrease in cooling capacity due to ventilation.

[0284] The opening arrangement surface S4 of the seventh projector 10g is rotated by, but not limited to, the switching mechanism 185. The opening arrangement surface S4 may also be rotated by a manual operation by the user. The airflow direction detection unit 190 detects the position of the opening arrangement surface S4 that has been rotated by a manual operation.

[0285] The seventh projector 10g has multiple connection units 60 arranged on the rear surface 20e and the first side surface 20d, but is not limited to this. The configuration is not limited as long as the multiple connection units 60 are arranged on two different surfaces. The ventilation direction switching unit 180 moves the opening arrangement surface S4 to a position along each of the two different surfaces on which the connection units 60 are arranged.

[0286] The following is a summary of this disclosure.

[0287] Appendix 1 The cooling device of the present disclosure comprises a housing that houses an object to be cooled and has a first surface and a second surface, an airflow path that circulates air to cool the object to be cooled, a first air vent that is arranged on the first surface and allows the air circulating in the airflow path to pass through, a second air vent that is arranged on the second surface and allows the air circulating in the airflow path to pass through, a first connection terminal that is arranged on the first surface, a second connection terminal that is arranged on the second surface, and a detection mechanism that detects that the first connection terminal has connected to a connected object, and when the detection mechanism detects that the first connection terminal has connected to the connected object, the air passes through the first air vent. The cooling device can utilize a space that is not provided with other devices, walls, etc. The cooling device can prevent a decrease in cooling capacity due to ventilation.

[0288] Appendix 2 In the cooling device according to Supplementary Note 1, the first ventilation port and the second ventilation port exhaust the air flowing through the airflow passage to the outside of the housing. The cooling device can suppress a decrease in cooling capacity caused by discharging air flowing through the airflow passage.

[0289] Appendix 3 A cooling device as described in Appendix 1 or Appendix 2, further comprising an opening / closing mechanism that opens and closes the first ventilation port and the second ventilation port, and when the detection mechanism detects that the first connection terminal has connected to the connected object, the opening / closing mechanism opens the first ventilation port to discharge the air from the first ventilation port and closes the second ventilation port. The cooling device exhausts air in a direction where there is a high probability that an exhaust space is available, thereby preventing a decrease in cooling capacity due to exhaust.

[0290] Appendix 4 In the cooling device described in Appendix 3, the detection mechanism detects that the second connection terminal is connected to the connected object, and when the detection mechanism detects that the second connection terminal is connected to the connected object, the opening and closing mechanism closes the first air vent and opens the second air vent to exhaust the air from the second air vent. The cooling device exhausts air in a direction where there is a high probability that an exhaust space is available, thereby preventing a decrease in cooling capacity due to exhaust.

[0291] Appendix 5 In the cooling device described in Appendix 4, when the detection mechanism detects that the first connection terminal and the second connection terminal are connected to the connected object, the opening / closing mechanism opens the first air vent and the second air vent to discharge the air from the first air vent and the second air vent. The cooling device exhausts air in a direction where there is a high probability that an exhaust space is available, thereby preventing a decrease in cooling capacity due to exhaust.

[0292] Appendix 6 In the cooling device described in any one of Supplementary Notes 3 to 5, the opening and closing mechanism includes an opening and closing member that opens and closes the first ventilation port and the second ventilation port, and a motor that moves the opening and closing member. The cooling device can open and close the first vent and the second vent with a space-saving mechanism.

[0293] Appendix 7 7. The cooling device according to claim 6, wherein the motor moves the opening / closing member along the first air vent. The cooling device can adjust the opening amount of the first vent.

[0294] Appendix 8 In the cooling device according to Supplementary Note 6, the motor rotates the opening / closing member. The cooling device has a simple configuration and can adjust the exhaust direction.

[0295] Appendix 9 In the cooling device according to Supplementary Note 1, the first air vent and the second air vent draw air into the airflow channel. The cooling device allows air that is unlikely to have been heated by other devices to flow into the enclosure.

[0296] Appendix 10 A cooling device as described in any one of claims 2 to 8, wherein the housing has a third surface different from the first surface and the second surface, and the third surface has a third air vent that discharges the air circulating through the airflow path outside the housing. The third ventilation opening is connected to the airflow passage, thereby improving the cooling capacity.

[0297] Appendix 11 The cooling device of the present disclosure comprises a housing that houses an object to be cooled and has a first surface and a second surface; an airflow path that circulates air to cool the object to be cooled; a first air vent arranged on the first surface and through which the air circulating through the airflow path can pass; a second air vent arranged on the second surface and through which the air circulating through the airflow path can pass; a pivotable connecting member that has a connection surface and can switch the position of the connection surface between a first connection position along the first surface or a second connection position along the second surface; a connection terminal arranged on the connection surface; and a detection mechanism that detects when the connection terminal is connected to a connected object; and when the detection mechanism detects that the connection terminal is connected to the connected object and the connection surface is positioned at the first connection position, the air passes through the first air vent. The cooling device can utilize a space that is not provided with other devices, walls, etc. The cooling device can prevent a decrease in cooling capacity due to ventilation.

[0298] Appendix 12 In the cooling device according to Supplementary Note 11, the first ventilation port and the second ventilation port exhaust the air flowing through the airflow passage to the outside of the housing. The cooling device can suppress a decrease in cooling capacity by discharging the air flowing through the airflow passage.

[0299] Appendix 13 In the cooling device described in Appendix 11 or 12, when the detection mechanism detects that the connection terminal has been connected to the connected object and the connection surface is located at the second connection position, the air passes through the second air vent. The cooling device can utilize a space that is not provided with other devices or walls.

[0300] Appendix 14 The cooling device of the present disclosure comprises a housing that houses an object to be cooled and has a first surface and a second surface, an airflow path that circulates air to cool the object to be cooled, a first connection terminal arranged on the first surface, a second connection terminal arranged on the second surface, a pivotable ventilation member that has a ventilation surface and is capable of switching the position of the ventilation surface to a first ventilation position along the first surface or a second ventilation position along the second surface, a ventilation port arranged on the ventilation surface, and a detection mechanism that detects when the first connection terminal is connected to a connected object, and when the detection mechanism detects that the first connection terminal is connected to the connected object and the ventilation surface is positioned in the first ventilation position, the air passes through the ventilation port. The cooling device can utilize a space that is not provided with other devices, walls, etc. The cooling device can prevent a decrease in cooling capacity due to ventilation. [Explanation of symbols]

[0301] 10...projector, 10a...first projector, 10b...second projector, 10c...third projector, 10d...fourth projector, 10e...fifth projector, 10f...sixth projector, 10g...seventh projector, 20...exterior housing, 20a...top surface, 20b...bottom surface, 20c...front surface, 20d...first side surface, 20e...rear surface, 20f...second side surface, 21...indicator, 23...operation panel, 30...image projection device, 31...light source unit, 32...uniformization optical system, 33...color separation optical system, 34...relay optical system, 35...image formation unit, 36...optics Component housing, 37...projection optical unit, 40...air intake port, 40a...rear intake port, 40b...first side intake port, 50...exhaust port, 50a...rear exhaust port, 50b...first side exhaust port, 50c...second rear exhaust port, 60...connection unit, 60a...rear connection unit, 60b...first side connection unit, 61...connector, 61a...rear input connector, 61b...first side input connector, 70...power supply unit, 71...power terminal, 80...exhaust mechanism, 80a...first exhaust mechanism, 80b...second exhaust mechanism, 80c...third exhaust mechanism, 80d...fourth exhaust mechanism, 80e...fifth exhaust mechanism, 80f... Sixth exhaust mechanism, 81...flow path inside the housing, 81a...flow path inside the first housing, 81b...flow path inside the second housing, 81c...flow path inside the third housing, 81d...flow path inside the fourth housing, 81e...flow path inside the fifth housing, 81r...rear path, 81s...side path, 85...fan, 85a...rear exhaust fan, 85b...first side exhaust fan, 85c...exhaust fan, 85d...rear intake fan, 85e...first side intake fan, 91...exhaust unit, 91a...first exhaust unit, 91b...second exhaust unit, 91c...third exhaust unit, 92...shielding unit, 92a...first shielding plate, 92b...second shielding plate, 93...drive mechanism, 93a...drive gear, 93b...drive transmission member, 93m...drive motor, 94...rotating plate, 95...rotating shaft, 95m...rotating motor, 96...slide unit, 96a...first slide plate, 96b...second slide plate, 97...slide drive mechanism, 97a...slide drive gear, 97b...slide drive transmission member, 97m...slide drive motor, 98...flap, 98m...flap drive motor, 100...control unit, 101...image control unit, 103...airflow control unit, 110...connection detection unit, 150...connector rotation unit, 151...unit rotation shaft, 155...wiring path,157...unit rotation mechanism, 170...rotation direction detection unit, 180...airflow direction switching unit, 181...opening rotation shaft, 183...internal unit flow path, 185...switching mechanism, 190...airflow direction detection unit, 201...connection cable, 201a...first connection cable, 201b...second connection cable, 211...power cable, 321...first lens array, 322...second lens array, 323...polarization conversion element, 324...superimposing lens, 331...first dichroic mirror, 332...second dichroic mirror, 333...first reflecting mirror, 341...incident side lens, 342... Second reflecting mirror, 343... relay lens, 344... third reflecting mirror, 351... field lens, 352... incident side polarizing plate, 353... transmissive LCD panel, 353B... blue light transmissive LCD panel, 353G... green light transmissive LCD panel, 353R... red light transmissive LCD panel, 355... color synthesis optical system, 356... optical path shift module, 371... lens barrel, Ax... optical axis, P1... rear connection position, P2... first side connection position, P3... rear ventilation position, P4... first side ventilation position, S1... first unit surface, S2... second unit surface, S3... connector arrangement surface, S4... opening arrangement surface.

Claims

1. a housing that houses an object to be cooled and has a first surface and a second surface; an airflow passage through which air for cooling the cooling target flows; A first ventilation hole that is disposed on the first surface and through which the air flowing through the airflow passage can pass; a second ventilation hole disposed on the second surface through which the air flowing through the airflow passage can pass; A first connection terminal disposed on the first surface; A second connection terminal disposed on the second surface; a detection mechanism for detecting that the first connection terminal is connected to a connected object, When the detection mechanism detects that the first connection terminal is connected to the connected object, the air passes through the first ventilation hole. Cooling device.

2. The first ventilation hole and the second ventilation hole exhaust the air flowing through the airflow passage to the outside of the housing. The cooling device according to claim 1 .

3. an opening / closing mechanism for opening and closing the first ventilation port and the second ventilation port; When the detection mechanism detects that the first connection terminal is connected to the connected object, the opening / closing mechanism opens the first ventilation port to exhaust the air from the first ventilation port and closes the second ventilation port. The cooling device according to claim 2.

4. The detection mechanism detects that the second connection terminal is connected to the connected object, When the detection mechanism detects that the second connection terminal is connected to the connected object, the opening / closing mechanism closes the first ventilation hole and opens the second ventilation hole to exhaust the air from the second ventilation hole. The cooling device according to claim 3.

5. when the detection mechanism detects that the first connection terminal and the second connection terminal are connected to the connected object, the opening / closing mechanism opens the first ventilation port and the second ventilation port to exhaust the air from the first ventilation port and the second ventilation port. The cooling device according to claim 4.

6. The opening / closing mechanism includes an opening / closing member that opens and closes the first ventilation port and the second ventilation port, and a motor that moves the opening / closing member. The cooling device according to claim 3.

7. The motor moves the opening / closing member along the first air vent. The cooling device according to claim 6.

8. The motor rotates the opening / closing member. The cooling device according to claim 6.

9. The first ventilation hole and the second ventilation hole draw air into the airflow passage. The cooling device according to claim 1 .

10. the housing has a third surface different from the first surface and the second surface, the third surface has a third ventilation port for discharging the air flowing through the airflow passage to the outside of the housing; The cooling device according to claim 2.

11. a housing that houses an object to be cooled and has a first surface and a second surface; an airflow passage through which air for cooling the cooling target flows; A first ventilation hole that is disposed on the first surface and through which the air flowing through the airflow passage can pass; a second ventilation hole disposed on the second surface through which the air flowing through the airflow passage can pass; a pivotable connection member having a connection surface, the position of the connection surface being switchable between a first connection position along the first surface and a second connection position along the second surface; A connection terminal disposed on the connection surface; a detection mechanism for detecting that the connection terminal is connected to a connected object, When the detection mechanism detects that the connection terminal is connected to the connected object and the connection surface is located at the first connection position, the air passes through the first ventilation hole. Cooling device.

12. The first ventilation hole and the second ventilation hole exhaust the air flowing through the airflow passage to the outside of the housing. The cooling device according to claim 11.

13. When the detection mechanism detects that the connection terminal is connected to the connected object and the connection surface is located at the second connection position, the air passes through the second ventilation hole. The cooling device according to claim 11.

14. a housing that houses an object to be cooled and has a first surface and a second surface; an airflow passage through which air for cooling the cooling target flows; A first connection terminal disposed on the first surface; A second connection terminal disposed on the second surface; a rotating ventilation member having a ventilation surface, the position of the ventilation surface being switchable between a first ventilation position along the first surface and a second ventilation position along the second surface; A ventilation hole disposed on the ventilation surface; a detection mechanism for detecting that the first connection terminal is connected to a connected object, When the detection mechanism detects that the first connection terminal is connected to the connected object and the ventilation surface is located at the first ventilation position, the air passes through the ventilation hole. Cooling device.

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