JP2015102716A - Video projection device, projection type video display device, and video display system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a video projection device or the like allowing easy replacement of a light source even with a configuration in which a cooling mechanism and the light source are disposed in separate housings.SOLUTION: A housing 111 for storing at least a part of a light source 10 has an opening H11 for exposing another part of the light source 10 to the outside of the housing 111. Housing 111 and housing 121 have holes H5a and H5b as connection configurations for selectively causing a connection state or a non-connection state, respectively. The non-connection state means the state in which the housing 111 is not connected to the housing 121. The light source 10 is detachable from a video projection device 100 via the opening H11 in the non-connection state.

Description

  The present invention relates to a video projection device, a projection video display device, and a video display system having a configuration for cooling a light source.

  Conventionally, a discharge lamp has been widely used as a light source of a projection display apparatus. 2. Description of the Related Art In recent years, the light output of LEDs has been increasing due to technological advances such as light emitting diodes (hereinafter also referred to as LEDs (Light Emitting Diodes)). Hereinafter, the LED is also referred to as a solid light source. Therefore, the said solid light source came to be used as a light source of a projection type video display apparatus. The lifetime of the solid light source varies depending on the temperature of the solid light source. Therefore, the solid light source needs to be controlled below an appropriate temperature. When the solid light source reaches a predetermined temperature or more, the lifetime of the solid light source is remarkably reduced, and the luminance of light emitted from the solid light source is also reduced.

  In general, a large cooling structure using heat radiation fins and a fan is used for cooling a solid light source used by the projection type image display device. In order to reduce the size of the projection type image display device, it is desirable that the cooling structure be realized as small as possible.

  Patent Document 1 discloses a technique for reducing the size of a cooling structure (hereinafter, also referred to as related technique A). Specifically, in Related Art A, the heat radiation fins are intensively cooled by the fan in a state where heat is transported to the heat radiation fins using a heat pipe.

  In addition, examples of techniques for configuring a large screen include the following techniques. This technique is a technique in which a plurality of projection-type image display devices that project images from a projection unit to a screen are arranged. With this technology, one multi-screen (large screen) is configured from the screens of a plurality of projection type video display devices. Patent Document 2 discloses a technology (hereinafter also referred to as related technology B) related to cooling of a projection-type image display device that displays images on a multi-screen.

JP 2011-154855 A JP 2012-194407 A

  The casings in the related technologies A and B accommodate a fan, a light source, and the like as a cooling mechanism. Therefore, in related technologies A and B, for example, when a fan fails, it is necessary to disassemble the housing so that the fan can be taken out. Also, when replacing the light source, it is necessary to disassemble the housing. That is, in the related technologies A and B, it is necessary to disassemble the casing every time maintenance of one or both of the fan and the light source is performed. Therefore, there is a problem that the maintainability of the fan and the light source is not good.

  Thus, a configuration in which a cooling mechanism such as a fan and a light source are provided in separate housings (hereinafter also referred to as configuration N) is conceivable. Hereinafter, the housing that houses the light source is also referred to as housing A. In the following, the housing that houses the cooling mechanism is also referred to as housing B.

  In the configuration N, the casing A and the casing B are connected so that the cooling mechanism can cool the light source for cooling the light source. Note that the luminance of the solid light source as the light source decreases with use time. Therefore, in order to maintain the quality of the solid light source, it is necessary to periodically replace the solid light source.

  Therefore, in the configuration N, when the light source is replaced, the following operation is performed. First, an operation of releasing the connection between the casing A and the casing B is performed. Thereafter, in order to take out the light source from the casing A, an operation of disassembling the casing A is performed. That is, in the configuration N, when replacing the light source, a lot of labor is required, and there is a problem that it takes time to replace the light source.

  The present invention has been made to solve such a problem, and provides a video projection device and the like in which a light source can be easily replaced even in a configuration in which a cooling mechanism and a light source are provided in separate housings. With the goal.

  In order to achieve the above object, a video projection apparatus according to an aspect of the present invention emits video light constituting a video. The video projection device includes a light source, a first casing that houses at least a part of the light source, and a second casing, and the first casing includes another part of the light source. A first opening that is exposed to the outside of the first casing is provided, and the first casing and the second casing are provided in the first casing and the second casing via a cushioning material. There is provided a connection configuration for selectively generating a connected state that is a connected state and a non-connected state that is a state where the first housing and the second housing are not connected, and the video The projection device is further accommodated in the second casing, and in the connected state, the projection device is accommodated in the second casing, and the radiator that is thermally coupled to the light source via a heat conductor. And a cooling mechanism for sending cooling air to the radiator, wherein the second casing is connected to the light source and the front in the connected state. Radiator and a second opening portion for thermally coupling is provided, said light source, said in non connected state, through the first opening, detachably constructed from the video projector.

  According to the present invention, the first casing that houses at least a part of the light source is provided with a first opening that exposes another part of the light source to the outside of the first casing. The first housing and the second housing are provided with a connection structure for selectively generating a connected state and a non-connected state. The light source is configured to be detachable from the video projection device through the first opening in the disconnected state.

  Thereby, only by the operation | movement for generating a non-connection state by a connection structure, a light source can be removed from the said image projection apparatus through the said 1st opening part. Therefore, even in the configuration in which the cooling mechanism and the light source are provided in separate housings, it is possible to provide an image projection apparatus in which the light source can be easily replaced.

It is a perspective view which shows the external appearance of the projection type video display apparatus concerning Embodiment 1 of this invention. It is sectional drawing which shows the structure of the video projection apparatus which concerns on Embodiment 1 of this invention. It is a perspective view which shows the external appearance of the thermal radiation unit which concerns on Embodiment 1 of this invention. It is a figure which shows the state which removed the housing | casing of the thermal radiation unit from the housing | casing of the projection unit. It is a figure which shows the image projection apparatus of a deformation | transformation structure. It is a figure which shows the state by which the video projection apparatus was accommodated in the opening part of the housing | casing of a projection type video display apparatus. It is a perspective view which shows the external appearance of the video display system which concerns on Embodiment 3 of this invention. It is a rear view of the video display system concerning Embodiment 3 of the present invention. It is a figure which shows the state from which the thermal radiation unit was removed. It is a figure which shows the structure which has arrange | positioned nine projection type video display apparatuses in matrix form.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description, the same components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, detailed description thereof may be omitted.

  It should be noted that the dimensions, materials, shapes, relative arrangements, and the like of the constituent elements exemplified in the embodiments are appropriately changed depending on the configuration of the apparatus to which the present invention is applied and various conditions. It is not limited to those examples. Moreover, the dimension of each component in each figure may differ from an actual dimension.

<Embodiment 1>
FIG. 1 is a perspective view showing an external appearance of a projection display apparatus 300 according to Embodiment 1 of the present invention. In FIG. 1, the X, Y, and Z directions are orthogonal to each other. The X, Y, and Z directions shown in the following figures are also orthogonal to each other. Hereinafter, a direction including the X direction and the direction opposite to the X direction (−X direction) is also referred to as an X-axis direction. In the following, the direction including the Y direction and the direction opposite to the Y direction (−Y direction) is also referred to as a Y-axis direction. In the following, a direction including the Z direction and a direction opposite to the Z direction (−Z direction) is also referred to as a Z-axis direction.

  Hereinafter, a plane including the X-axis direction and the Y-axis direction is also referred to as an XY plane. Hereinafter, a plane including the X-axis direction and the Z-axis direction is also referred to as an XZ plane. Hereinafter, a plane including the Y-axis direction and the Z-axis direction is also referred to as a YZ plane.

  With reference to FIG. 1, a projection display apparatus 300 includes a video projection apparatus 100, a casing 500, and a screen 400.

  Although the details will be described later, the video projection device 100 is a device that emits video light constituting a video. The casing 500 is a cabinet that houses the video projection device 100, as will be described in detail later. The screen 400 is attached to the housing 500. Video light emitted from the video projection device 100 is projected onto the screen 400. Thereby, the projection display apparatus 300 displays an image indicated by the image light. The screen 400 is a transmissive screen.

  In the present embodiment, the video projection device 100 will be described in detail. FIG. 2 is a cross-sectional view showing a configuration of video projection apparatus 100 according to Embodiment 1 of the present invention. FIG. 2A is a cross-sectional view of the video projection device 100 along the XY plane. FIG. 2B is a cross-sectional view of the video projection device 100 along the XZ plane.

  Referring to FIGS. 1 and 2, video projection apparatus 100 includes a projection unit 110 and a plurality of heat dissipation units 120. In FIG. 2A, three heat radiating units 120 are shown as an example. In addition, the number of the heat radiating units 120 is not limited to 3, and may be 1, 2 or 4 or more.

  The projection unit 110 includes a plurality of light sources 10, an illumination system 101, a projection system 102, and a housing 111. FIG. 2A shows three light sources 10 as an example. The number of light sources 10 is not limited to 3, and may be 1, 2 or 4 or more.

  The light source 10 is provided in the projection unit 110. The light source 10 emits light. The light source 10 is a solid light source such as an LED.

  The casing 111 is a casing corresponding to the outer surface of the projection unit 110. The casing 111 houses the illumination system 101 and the projection system 102. In addition, the housing 111 is provided with the same number of openings H11 as the number of the light sources 10.

  Each opening H11 is provided so that a part of the light source 10 is exposed to the outside of the housing 111 through the opening H11. That is, the opening H11 exposes a part of the light source 10 to the outside of the housing 111. That is, the housing 111 accommodates a part of the light source 10. A part of the light source 10 housed in the casing 111 is a part different from a part of the light source 10 exposed to the outside of the casing 111 through the opening H11.

  Note that the casing 111 may be configured to accommodate the entire light source 10. That is, the housing 111 accommodates at least a part of the light source 10.

  A heat conductor 20 is provided in a portion of the light source 10 exposed to the outside of the casing 111. The heat conductor 20 is, for example, grease with high heat conductivity. In addition, the heat conductor 20 is not limited to grease, For example, a heat dissipation sheet with high heat conductivity may be sufficient.

  The illumination system 101 has a configuration for guiding the light emitted from the light source 10 to the projection system 102. The illumination system 101 is composed of, for example, a lens and a mirror. The projection system 102 includes a projection lens 70. The projection system 102 uses the light emitted from the illumination system 101 to generate image light that constitutes an image. Then, the projection system 102 emits image light to the outside of the housing 111 via the projection lens 70.

  Next, the heat dissipation unit 120 will be described. FIG. 3 is a perspective view showing an appearance of the heat dissipation unit 120 according to Embodiment 1 of the present invention.

  With reference to FIG. 2 and FIG. 3, the plurality of heat dissipation units 120 are linearly arranged along the X-axis direction. The heat dissipation unit 120 is a unit having a heat dissipation function. The heat dissipation unit 120 includes a heat radiator 50, a cooling mechanism 60, and a housing 121.

  The radiator 50 has a heat dissipation function. The radiator 50 is a heat sink. The radiator 50 is made of a material having high thermal conductivity such as aluminum or copper. The heat radiator 50 includes the heat receiving portion 30 and a plurality of heat radiating fins 40. The shape of the heat receiving part 30 is plate-shaped. The plurality of heat radiating fins 40 are provided on the surface of the heat receiving portion 30 as shown in FIG. Specifically, the plurality of radiating fins 40 are provided so as to be aligned in the Z-axis direction so as to form an air passage in the X-axis direction.

  The cooling mechanism 60 is a cooling fan having a function of generating wind. The cooling mechanism 60 sends cooling air to the radiator 50.

  The housing 121 houses the radiator 50 and the cooling mechanism 60. The housing 121 has side surfaces 121L and 121R parallel to the YZ plane, as shown in FIG. An intake port H21 is provided on the side surface 121L. The side surface 121R is provided with an exhaust port H22. That is, the housing 121 is provided with an intake port H21 and an exhaust port H22.

  The intake port H21 is an intake port for taking the outside air of the housing 121 into the housing 121 as cooling air when the cooling mechanism 60 that is a cooling fan is driven. The exhaust port H22 is an exhaust port for discharging cooling air to the outside of the housing 121 when the cooling mechanism 60 that is a cooling fan is driven. The cooling air generated by driving the cooling mechanism 60 is sent in the X direction as shown in FIG. Thereby, the said cooling wind passes the above-mentioned air path formed in each radiator 50. FIG.

  The casings 121 of the plurality of heat dissipation units 120 are configured to be connectable to the casing 111 via the cushioning material 80. The buffer material 80 has a heat insulating property. The buffer material 80 has a predetermined thickness. Hereinafter, the state where the casing 111 and the casing 121 are connected via the cushioning material 80 is also referred to as a connected state. In the following, a state where the casing 111 and the casing 121 are not connected is also referred to as a non-connected state. That is, the disconnected state is a state in which an operator can touch the light source 10 from the outside of the casing 111.

  Hereinafter, the three heat dissipation units 120 shown in FIG. 2 are also referred to as heat dissipation units 120A, 120B, and 120C, respectively. In the following description, the casings 121 of the heat dissipation units 120A, 120B, and 120C are also referred to as casings 121A, 121B, and 121C, respectively.

  FIG. 4 is a diagram illustrating a state where the casing 121A of the heat dissipation unit 120A is removed from the casing 111 of the projection unit 110 as an example.

  Referring to FIGS. 2 and 3 again, the housing 111 is provided with a hole H5a. The housing 121 is provided with a hole H5b. The holes H5a and H5b are holes into which the screw SC1 is inserted.

  Connection in which the casing 111 and the casing 121 are connected via the cushioning material 80 by an operator using a screwdriver to insert the screw SC1 into the holes H5b and H5a in the order of the holes H5b and H5a. A condition occurs. Note that the unconnected state occurs when the screw SC1 is extracted from the holes H5b and H5a.

  That is, the hole H5a provided in the housing 111 and the hole H5b provided in the housing 121 are a connection configuration for selectively generating a connected state and a non-connected state by the screw SC1. The connection configuration is a configuration in which the housing 111 and the housing 121 can be repeatedly connected by a predetermined connection force.

  Note that the connection configuration for connecting the housing 111 and the housing 121 is not limited to the configuration using the holes H5b and H5a. For example, the connection configuration may be a configuration using magnetic force such as a magnet (hereinafter also referred to as configuration A1).

  In the configuration A1, for example, the housing 111 is made of iron, and the housing 121 is made of a magnet. In the configuration A1, it is not necessary to provide the holes H5b and H5a.

  The plurality of heat dissipation units 120 are configured to be connectable. That is, the plurality of housings 121 are configured to be connectable. Here, as an example, a configuration for connecting the housing 121A of the heat dissipation unit 120A and the housing 121B of the heat dissipation unit 120B will be described. The casing 121A and the casing 121B are adjacent to each other when the casing 121A and the casing 121B are connected.

  2 and 3, a groove 126 extending in the Y-axis direction is provided on side surface 121L of housings 121A and 121B. In addition, protrusions 127 extending in the Y-axis direction are provided on the side surfaces 121R of the casings 121A and 121B.

  Each of the groove 126 and the protrusion 127 has a shape in which the protrusion 127 can be fitted into the groove 126. That is, a protrusion 127 that fits into the groove 126 of the side surface 121L is provided on the side surface 121R of the housing 121A that faces the side surface 121L of the housing 121B.

  Here, as an example, it is assumed that the states of the casings 121A and 121B are as shown in FIG. That is, it is assumed that the housing 121B and the housing 111 are connected.

  In this case, each of the groove 126 and the protrusion 127 has the housing 121A in the Y-axis direction in a state where the end of the protrusion 127 of the housing 121A is fitted in the groove 126 of the housing 121B. It is configured to be movable. That is, the groove 126 and the protrusion 127 are configured so that the housing 121A can be moved in the Y-axis direction in a state where the protrusion 127 is fitted in the groove 126. That is, each of the groove 126 and the protrusion 127 functions as a slide rail.

  Note that the configuration for connecting the plurality of housings 121 may be a configuration that does not use the grooves 126 and the protrusions 127 (hereinafter also referred to as configuration A2). In the configuration A2, for example, a plurality of adjacent casings 121 are connected using a magnetic force such as a magnet.

  Further, as described above, the number of heat dissipating units 120 included in the video projector 100 may be one. In this case, one heat dissipation unit 120 (housing 121) is configured to be connectable to the housing 111.

  Note that when the video projection apparatus 100 of the present embodiment is driven, one heat radiating unit 120 is attached to each light source 10 via the heat conductor 20, as shown in FIG. Therefore, each housing 121 is provided with an opening H23 for thermally coupling the light source 10 and the radiator 50 (heat receiving unit 30) in the above-described connected state (see FIG. 4). In the connected state, the radiator 50 (heat receiving unit 30) is thermally coupled to the light source 10 via the heat conductor 20. The heat conductor 20 has a function of reducing thermal resistance in a state where the radiator 50 and the light source 10 are thermally coupled.

  As described above, the casing 121 of the heat dissipation unit 120 is configured to be connectable to the casing 111 via the cushioning material 80. When the casing 121 and the casing 111 are coupled with a predetermined coupling force, the thickness of the heat conductor 20 becomes a predetermined target thickness. Thereby, the thermal conductivity required for cooling the light source 10 can be obtained.

  The light source 10 is configured to be detachable from the video projection device 100 through the opening H11 in the above-described disconnected state. Specifically, the light source 10 is configured to be detachable from the projection unit 110 via the opening H11 in a disconnected state. That is, the light source 10 is configured to be removable from the casing 111 through the opening H11.

  Next, with reference to FIG. 2, a heat transfer state when the video projection device 100 is driven will be described. The heat generated from the light source 10 is transmitted to the heat receiving unit 30 through the heat conductor 20. And the heat of the heat receiving part 30 is transmitted to the radiation fin 40. The heat transmitted to the radiating fin 40 is heat-exchanged by the cooling air hitting the radiating fin 40 by driving the cooling mechanism 60 as a cooling fan.

  Note that the cooling air generated by driving the cooling mechanism 60 enters the inside of the housing 121 from the air inlet H21. And the cooling air in the housing | casing 121 is discharged | emitted from the exhaust port H22 to the exterior of the housing | casing 121. FIG. As shown in FIG. 2, in the state in which the plurality of connected heat dissipation units 120 are connected to the casing 111, the cooling air flows downstream (for example, from the exhaust port H <b> 22 on the upstream side (for example, the casing 121 </ b> A)). It is sent to the inlet H21 of the casing 121B).

  Until the cooling air enters the inside of the housing 121 through the intake port H21 and is discharged to the outside of the housing 121 through the exhaust port H22, the path of the cooling air is routed by the housing 121. It is shielded from the outside and the projection unit 110 including the light source 10. Further, the opening H <b> 23 (see FIG. 4) provided in the housing 121 is blocked by the heat receiving unit 30. Therefore, the cooling air does not leak from the opening H23 to the outside of the housing 121.

  Thus, heat generated by the light source 10 is exchanged only in the heat dissipation unit 120 (housing 121), which is a space isolated from the light source 10. That is, the cooling air generated by the cooling mechanism 60 does not pass around the light source 10 and the projection unit 110. Therefore, the light source 10 can be cooled without the dust contained in the cooling air being taken into the housing 111.

  In the video projection device 100, when the light source 10 is replaced due to the life or failure of the light source 10, the operator can connect the housing 111 and the housing 121 in a state where the housing 111 and the housing 121 are connected by the connection configuration. An operation for releasing the connection with the housing 121 is performed.

  Thus, the operator can easily replace the light source 10 by simply removing the heat radiating unit 120 corresponding to the light source 10 to be replaced from the other heat radiating unit 120 adjacent to the heat radiating unit 120.

  When removing the heat dissipation unit 120, the protrusion 127 of the heat dissipation unit 120 and the groove 126 of the other heat dissipation unit 120 function as a slide rail. Therefore, positioning or fixing of the heat radiating unit 120 can be easily performed.

  As described above, according to the present embodiment, the casing 111 that houses at least a part of the light source 10 is provided with the opening H11 that exposes another part of the light source 10 to the outside of the casing 111. It is done. The casing 111 and the casing 121 are provided with holes H5a and H5b as a connection configuration for selectively generating a connected state and a non-connected state, respectively. The unconnected state is a state where the housing 111 and the housing 121 are not connected. The light source 10 is configured to be detachable from the video projection device 100 through the opening H11 in a disconnected state.

  Thereby, the light source 10 can be removed from the video projection apparatus 100 through the opening H11 by performing only the operation for generating the non-connected state by the connection configuration.

  Here, when there are a plurality of housings 121, the operation for generating the disconnected state includes the operation for releasing the connection between the housing 111 and the housing 121, and the operation of the housing 121 and other cases. There are only two operations for releasing the connection with the housing 121. Further, when the number of the housings 121 is 1, the operation for generating the non-connected state is an operation for releasing the connection between the housing 111 and the housing 121.

  Therefore, even in the configuration in which the cooling mechanism and the light source are provided in separate housings, it is possible to provide the video projection device 100 in which the light source can be easily replaced.

  Specifically, when replacing a light source in a conventional projection display apparatus having a configuration in which a cooling mechanism (fan), a light source, and the like are housed in one housing, the following first to fifth steps are performed. It was necessary. A 1st process is a process of taking out the light source utilization apparatus containing the light source from the housing | casing of a projection unit. The light source utilization device is a projection device that projects an image or a light source device that emits light.

  The second step is a step of releasing the fixation between the light source utilization device and the light source. The third step is a step of replacing the light source. The fourth step is a step of fixing the light source to the light source utilization device again. The fifth step is a step of returning the light source utilization device into the housing of the projection unit.

  On the other hand, in the case of light source replacement in the video projection apparatus 100 according to the present embodiment, it is only necessary to perform the following first to third steps A. The first step A is a step for releasing the connection between the casing 121 (heat radiation unit 120) and the casing 111 by the connection configuration (holes H5b, H5a). The second step A is a step of replacing the light source. The third step A is a step of connecting the casing 121 (heat radiation unit 120) to the casing 111 again. That is, according to the present embodiment, it is possible to easily (simplely) replace the light source with fewer steps than in the past.

  In addition, video projection apparatus 100 of the present embodiment includes a projection unit 110 and a plurality of heat dissipation units 120. The projection unit 110 includes a housing 111 that houses at least a part of the light source 10. Each heat radiation unit 120 includes a housing 121, a heat radiator 50 including the heat receiving unit 30 and the heat radiation fins 40, and a cooling mechanism 60. The housing 121 accommodates the heat radiator 50 and the cooling mechanism 60. To do. The casing 111 and the casing 121 are provided with a connection configuration for selectively generating a connected state and a non-connected state. In the connected state, the casing 111 and the casing 121 are connected via a cushioning material 80.

  Note that the housing 111 and the housing 121 are each opened so that the light source 10 and the heat receiving unit 30 are thermally coupled via the heat conductor 20 when the housing 111 and the housing 121 are connected. A portion H11 and an opening H23 are provided. Further, in the above-described connected state, the housing 121 is provided with the intake port H21 and the exhaust port H22 so that the cooling air can be sent downstream of the path of the cooling air.

  Further, the heat dissipation unit 120 is isolated from the projection unit 110. That is, in the present embodiment, the cooling air is configured to pass only through the space isolated from the projection unit 110 including the light source 10. Thereby, the cooling air for radiating the light source 10 is configured not to be taken into the projection unit 110.

  With this configuration, dust contained in the cooling air can be prevented from entering the projection unit 110. That is, the light source 10 can be cooled without taking dust into the projection unit 110.

  Further, since the cooling air does not pass through the projection unit 110 including the lens group, the light source 10 and the like, dust can be prevented from adhering to the light emitting surface of the light source 10. Accordingly, it is possible to prevent a decrease in luminance due to dust adhering to the light emitting surface of the light source 10. In addition, it is possible to prevent the occurrence of image defects due to dust adhering to the lens.

  Further, according to the present embodiment, the operator can easily replace the light source 10 exposed from the opening H11 only by performing an operation for releasing the connection between the housing 111 and the housing 121. Can do. In addition to the light source 10, the worker can easily replace the radiator 50 (heat sink) and the cooling mechanism 60 (cooling fan) through the opening H11.

  Further, according to the present embodiment, the operator can easily release the connection between the housing 111 and the housing 121 from the back surface of the video projection device 100. Therefore, only the light source 10 to be replaced can be easily replaced.

  Further, according to the present embodiment, the plurality of heat dissipation units 120 are arranged linearly along the X-axis direction. Thereby, each light source 10 can be cooled in a space-saving manner. Therefore, the video projector 100 can be downsized.

  Further, according to the present embodiment, the cushioning material 80 is provided between the casing 111 and the casing 121. This prevents heat transmitted from the light source 10 to the housing 121 from being transmitted to the housing 111 again. That is, the backflow of heat to the casing 111 is prevented. Therefore, the cooling capacity of the light source 10 can be improved. As a result, the optical performance of the light source 10 can be maintained.

  Furthermore, by providing the buffer material 80, the buffer material 80 absorbs vibration from the cooling mechanism 60 (cooling fan) accommodated in the housing 121. Therefore, vibration due to the cooling mechanism 60 is not transmitted from the casing 121 to the casing 111. Thereby, the noise reduction of the video projector 100 can be realized.

  Furthermore, by providing the cushioning material 80, the cushioning material 80 functions as a seal that closes the gap between the housing 111 and the housing 121. Therefore, the buffer material 80 can prevent dust from entering the housing 111.

  Further, as described above, the cooling air can be guided to the radiator 50 without waste due to the structure that prevents the intrusion of dust. Therefore, the cooling efficiency of each light source 10 can be improved.

  Further, the radiator 50 (heat sink) is surrounded by the casing 121. That is, the shape of the cooling air flow path for cooling the radiator 50 is a duct shape. Therefore, the radiator 50 can be efficiently cooled.

  Moreover, since the radiator 50 can be efficiently cooled by the above-described duct shape, driving power of the cooling mechanism 60 (cooling fan) can be suppressed. Therefore, low power consumption and low noise can be realized.

  Moreover, since the heat radiator 50 can be efficiently cooled by the above-described duct shape, the temperature of the light source 10 can be lowered. Therefore, the life of the light source 10 can be extended and the brightness can be increased.

  2 shows an example in which the cooling mechanism 60 (cooling fan) is disposed on the upstream side of the radiator 50 (heat sink), the present invention is not limited to this configuration. The cooling mechanism 60 may be disposed on the downstream side of the radiator 50.

  In FIG. 2, the configuration in which one cooling mechanism 60 is disposed in one housing 121 is shown, but the configuration is not limited to this. Two or more cooling mechanisms 60 may be arranged in one housing 121. Even in this configuration, the light source 10 can be cooled without taking in dust into the projection unit 110 in a space-saving manner. Further, the light source 10 can be easily replaced only by performing an operation for releasing the connection between the housing 111 and the housing 121.

  In FIG. 2, one cooling mechanism 60 is arranged in each housing 121, but the present invention is not limited to this. For example, it is good also as a structure which arrange | positions the cooling mechanism 60 only to the most upstream housing | casing 121 among the some housing | casing 121 connected.

  Further, as shown in FIG. 2, the casing 111 and the casing 121 are connected via a heat insulating cushioning material 80. With this configuration, it is possible to prevent the heat generated by the light source 10 from being transmitted to the housing 111 from the heat transmitted to the housing 121 via the heat receiving unit 30. That is, the heat generated by the light source 10 can be prevented from returning to the light source 10 again via the heat receiving unit 30, the casing 121, and the casing 111. Therefore, the light source 10 can be cooled more efficiently by intensively cooling the heat dissipation unit 120.

  Note that the housing 121 may be made of a sound-absorbing plastic material. The sound absorbing plastic material is a plastic material having a function of absorbing sound. With this configuration, noise generated by the cooling mechanism 60 can be reduced while the light source 10 is efficiently cooled.

  The plurality of light sources 10 may have different heat generation amounts due to variations in deterioration speed. Here, in the configuration of FIG. 2A, the temperature of the cooling air corresponding to the heat radiator 50 becomes higher in the heat radiator 50 downstream of the cooling air path.

  For this reason, when the heat generation amounts of the plurality of light sources 10 are different, the plurality of light sources 10 may be arranged in ascending order of the heat generation amount from the downstream to the upstream of the cooling air path. That is, it is good also as a structure which arrange | positions the light source 10 with small emitted-heat amount to the position near the downstream of the path | route of cooling air. With this configuration, the plurality of light sources 10 can be efficiently cooled.

  In addition, in FIG. 2, although the structure which sends cooling air to a X direction was shown, it is not limited to this. Video projection apparatus 100 of the present embodiment may have a configuration that sends cooling air in the Z direction (hereinafter referred to as modified configuration B), for example.

  FIG. 5 is a diagram illustrating a video projection apparatus 100 having a modified configuration B. FIG. 5A is a cross-sectional view of the video projection apparatus 100 having the modified configuration B along the XY plane. Note that FIG. 5A shows a state in which the leftmost casing 121 is separated from the casing 111 for easy viewing of the drawing. FIG. 5B is a cross-sectional view of the video projection device 100 having the modified configuration B along the XZ plane.

  In the modified configuration B, the heat radiator 50 is arranged such that the air path formed by the plurality of heat radiating fins 40 extends in the Z-axis direction as shown in FIG. Moreover, the cooling mechanism 60 is provided in the lower part of the heat radiator 50 which can send cooling air to a Z direction.

  With the modified configuration B, all the radiators 50 (heat sinks) can exchange heat with fresh air. In the configuration of FIG. 2A, for example, the temperature of the cooling air corresponding to the radiator 50 is higher in the radiator 50 downstream of the cooling air path, so that the cooling efficiency of the radiator 50 is reduced. It was. On the other hand, in the modified configuration B, the radiator 50 downstream of the cooling air path can be efficiently cooled under the same conditions as the other radiators 50.

  The light source device shown in the related art A is characterized in that a plurality of radiators are arranged in series for cooling down, and a cooling unit that cools the plurality of radiators together is provided. . Thereby, the cooling air is taken into the light source device from the outside of the housing, and the plurality of radiators are cooled.

  However, in the configuration of the light source device, there is a high possibility that dust contained in the outside air is taken into the casing together with the taken cooling air. That is, Related Art A shows a structure in which cooling air containing dust is actively sent to the vicinity of the light emitting portion of the LED. For this reason, dust may enter the light emitting portion of the light source, and the dust may adhere to the light emitting portion. In this case, the light path of the light source is obstructed by dust, and there is a problem that the brightness, which is the basic performance of the light source device, is impaired.

  Further, in the projection type image display device including the light source device of Related Technology A, dust may enter the lens group that projects light from the light source device, and the dust may adhere to the lens group. For this reason, there is a problem in that a portion corresponding to a portion to which dust is attached is missing in the image, which appears as a defect or a defect in the image.

  Further, the luminance of a light source such as an LED decreases with use time. Therefore, in order to maintain the quality of the light source, it is necessary to periodically replace the light source. In a projection-type image display device including a light source device including the light source, when replacing a light source, a radiator, a cooling fan, or the like, it is necessary to take out the light source device from a housing and perform an exchange operation. Therefore, there has been a problem that the replacement work takes time.

  On the other hand, since the video projection apparatus 100 of this Embodiment is comprised as mentioned above, it can solve said problem.

<Embodiment 2>
In the first embodiment, the video projection device 100 accommodated in the projection video display device 300 has been described. In the present embodiment, the projection display apparatus 300 will be described in detail. Note that video projection apparatus 100 in the present embodiment has the same configuration as video projection apparatus 100 described in the first embodiment.

  Referring to FIG. 1 again, the housing 500 of the projection display apparatus 300 is provided with an opening H50. The opening H50 is configured to accommodate the video projection device 100 in a state where the housing 121 of the video projection device 100 is exposed to the outside of the housing 500.

  FIG. 6 is a diagram illustrating a state in which the video projection device 100 is accommodated in the opening H <b> 50 of the housing 500.

  Referring to FIGS. 1 and 6, housing 500 blocks light outside housing 500 from entering housing 500. The casing 500 is provided with a duct 501 and a duct 502 extending in the vertical direction (Z-axis direction). Duct 501 and duct 502 are provided so as to sandwich opening H50. The duct 501 is an intake duct. The duct 502 is an exhaust duct. Each of the duct 501 and the duct 502 extends along the vertical direction (Z-axis direction). In addition, each of the duct 501 and the duct 502 is provided so as to penetrate the housing 500.

  Hereinafter, the state in which the video projection device 100 is accommodated in the opening H50 is also referred to as an accommodated state.

  Duct 501 includes an air inlet H51. The intake port H51 is connected to the intake port H21 of the housing 121 of the video projection device 100 in the accommodated state. Duct 502 includes an exhaust port H52. The exhaust port H52 is connected to the exhaust port H22 of the housing 121 of the video projection device 100 in the accommodated state.

  The housing 500 is provided with a protrusion 527 and a groove 526 that extend in the Y-axis direction. The protrusion 527 and the groove 526 are provided in a portion of the housing 500 where the opening H50 is formed. The protrusion 527 has a shape such that the protrusion 527 fits into the groove 126 of the video projection device 100. The groove 526 has a shape such that the groove 526 fits into the protrusion 127 of the video projection device 100.

  Each of the groove 526 and the protrusion 527 is configured such that the end of the protrusion 527 in the Y-axis direction is fitted into the groove 126 of the video projection device 100 and the end of the protrusion 127 of the video projection device 100 in the Y-axis direction is the groove 526. The video projection device 100 is configured to be movable in the Y-axis direction in a state of being fitted to the Y-axis. That is, the projection 527 and the groove 526 are configured such that the video projection device 100 can move in the Y-axis direction in a state where the projection 527 is fitted into the groove 126 and the projection 127 is fitted into the groove 526. Is done.

  That is, the groove 526 and the protrusion 527 are slidably fitted to the protrusion 127 and the groove 126, respectively. That is, each of the groove 526 and the protrusion 527 functions as a slide rail, like the groove 126 and the protrusion 127.

  Next, the air flow in the projection display apparatus 300 will be described. First, the air below the duct 501 enters the duct 501. Then, the air in the duct 501 enters the casing 121A as cooling air from the air inlet H21 of the casing 121A of the video projection device 100. Then, the cooling air passes through the housings 121A, 121B, and 121C to exchange heat and become exhaust air. Then, the exhaust air enters the duct 502 from the exhaust port H22 of the casing 121C through the exhaust port H52. The exhaust air in the duct 502 is sent in the Z direction and goes out of the housing 500.

  As described above, the same effects as those of the first embodiment can be obtained also in the projection-type image display device 300 in which the image projection device 100 is accommodated. That is, each light source 10 of the video projection device 100 accommodated in the projection video display device 300 can be efficiently cooled.

  Further, according to the projection display apparatus 300 of the present embodiment, the opening H50 accommodates the video projection apparatus 100 in a state where the casing 121 of the video projection apparatus 100 is exposed to the outside of the casing 500. .

  Therefore, for example, when exchanging the light source 10, the operator can use the heat radiation unit 120 that is thermally coupled to the light source 10 to be replaced in a state in which the video projection device 100 is accommodated in the projection video display device 300. Only the housing 121 is removed from the housing 111. The housing 121 is removed by, for example, removing the screw SC1 that connects the housing 121 and the housing 111. Thus, the operator can easily replace the light source 10 without taking out the video projection device 100 (the plurality of heat radiation units 120 as a whole) from the projection video display device 300.

  Further, as described in Embodiment 1, the groove 126 and the protrusion 127 function as a slide rail. Therefore, the worker removes the casing 121 of the heat radiating unit 120 that is thermally coupled to the light source 10 to be replaced from the video projection device 100 in a state where the video projection device 100 is accommodated in the projection type video display device 300. It can be easily removed.

  Further, as described above, the projection 527 and the groove 526 are moved in the Y-axis direction when the projection 527 is fitted in the groove 126 and the projection 127 is fitted in the groove 526. It is configured to be free. Therefore, the video projection device 100 can be easily detached from the projection video display device 300.

  In addition, the projection display apparatus 300 that houses the image projection apparatus 100 can obtain the same effects as those of the first embodiment other than those described above.

<Embodiment 3>
Next, a video display system 1000 configured using a plurality of projection type video display devices 300 described in the second embodiment will be described.

  FIG. 7 is a perspective view showing an appearance of a video display system 1000 according to Embodiment 3 of the present invention. FIG. 8 is a rear view of the video display system 1000 according to Embodiment 3 of the present invention. For convenience of explanation, FIG. 8 is a perspective view so that the internal structure of the video display system 1000 can be understood.

  As an example, the video display system 1000 includes three projection video display devices 300. The projection display apparatus 300 has the same configuration as the projection display apparatus 300 described in the second embodiment.

  In addition, the number of the projection type video display apparatuses 300 which comprise the video display system 1000 is not limited to 3, and may be 2 or 4 or more.

  The casings 500 of the plurality of projection display apparatuses 300 have shapes that can be stacked in the vertical direction. Note that, as described above, each of the duct 501 and the duct 502 of each casing 500 (projection-type image display device 300) extends along the vertical direction (Z-axis direction). In addition, each of the duct 501 and the duct 502 of each casing 500 is provided so as to penetrate the casing 500.

  In the following, the three projection display apparatuses 300 shown in FIG. 7 are also referred to as projection display apparatuses 300A, 300B, and 300C, respectively. FIG. 8 shows a state in which the projection display apparatus 300C is installed on the table 301. The base 301 is a base for sending air to the lower part of the duct 501 of the projection display apparatus 300C.

  In addition, if projection type video display apparatus 300C is installed so that air may enter the lower part of duct 501 of projection type video display apparatus 300C, projection type video display apparatus 300C may not be installed on stand 301.

  Referring to FIG. 7, in video display system 1000, projection video display devices 300A, 300B, and 300C are arranged adjacent to each other in the vertical direction. Further, the projection type video display devices 300A and 300B are configured such that the duct 501 of the projection type video display device 300A is connected to the duct 501 of the projection type video display device 300B adjacent to the projection type video display device 300A in the vertical direction, and It arrange | positions so that the duct 502 of the projection type video display apparatus 300A may be connected with the duct 502 of the projection type video display apparatus 300B.

  The projection type video display devices 300B and 300C are also arranged in the same manner as the projection type video display devices 300A and 300B.

  By disposing the projection type image display devices 300A, 300B, and 300C as described above, an intake path is configured from the three ducts 501 corresponding to the projection type image display devices 300A, 300B, and 300C, respectively. The intake path extends in the vertical direction. Further, an exhaust path is constituted by three ducts 502 corresponding to the projection type image display devices 300A, 300B, and 300C, respectively. The exhaust path extends in the vertical direction. The exhaust path has a function as a chimney.

  By arranging the projection type video display devices 300A, 300B, and 300C as described above, a multi-screen 400A is configured from the screen 400 of the projection type video display devices 300A, 300B, and 300C.

  Next, the flow of air in the video display system 1000 will be described. Referring to FIG. 8, first, air enters the above-described intake path from table 301. Specifically, air enters the duct 501 of the projection display apparatus 300C from the base 301. Air in the duct 501 is sent into the duct 501 of the projection display apparatus 300B, 300A.

  Further, the air in the duct 501 enters the casing 121A as cooling air from the air inlet H21 of the casing 121A of the video projection device 100 of the projection display apparatus 300C. Then, the cooling air passes through the housings 121A, 121B, and 121C to exchange heat and become exhaust air. The exhaust air is then sent to the exhaust path described above.

  Specifically, the exhaust air enters the duct 502 of the projection display 300C from the exhaust port H22 of the housing 121C through the exhaust port H52. The exhaust air in the duct 502 goes out of the video display system 1000 through the duct 502 of the projection type video display devices 300B and 300A.

  Note that the air in the duct 501 of the projection display apparatuses 300B and 300A also moves in the same manner as the air in the projection display apparatus 300C described above, so detailed description will not be repeated.

  With the above configuration, each of the ducts 501 of the projection display apparatuses 300A, 300B, and 300C sends fresh air to the casing 121A (heat dissipating unit 120) connected to the duct 501. In addition, each of the ducts 502 of the projection type image display devices 300A, 300B, and 300C can display the image without confining the exhaust air from the casing 121C (heat radiation unit 120) connected to the duct 502 in the casing 500. It can be taken out of the display system 1000.

  As described above, the video display system 1000 includes the above-described intake path and exhaust path, and the above-described projection-type video display apparatus 300 that houses the video projection apparatus 100. Therefore, fresh air can be sent into each housing 121 (heat radiation unit 120) of the video projection device 100 accommodated in all the projection video display devices 300 constituting the video display system 1000. Further, similarly to the first embodiment, the light source 10 can be cooled without taking dust into the projection unit 110.

  Next, an operation when the light source 10 is replaced in the video display system 1000 will be described. Here, it is assumed that the light source 10 is exchanged according to the following condition A. Condition A is a condition that the light source 10 to be replaced is the light source 10 that is thermally coupled to the radiator 50 of the heat radiating unit 120B included in the video projection device 100 housed in the projection video display device 300A. is there.

  In this case, as shown in FIG. 9, the worker has the housing 121 of the heat radiating unit 120 </ b> B thermally coupled to the light source 10 to be replaced in a state where the video projection device 100 is accommodated in the projection video display device 300. Can be removed from the housing 111 only.

  In addition, there exists the above-mentioned related technique B as a technique regarding the projection type video display apparatus which can comprise a multiscreen. However, in the projection type video display device described in the related art B, when replacing the parts of the projection type video display device arranged at the top, the projection unit of the projection type video display device is once lowered to the ground. Therefore, it is necessary to replace the light source. That is, the related technique B has a problem that it takes time to replace the light source. Further, in Related Technology B, there is a problem that the loading and unloading work of the projection unit involves danger.

  Specifically, in the state where a plurality of conventional projection video display devices are stacked, when the light source of the uppermost projection video display device is replaced, for example, the following first to seventh steps N are performed. It was necessary.

  The first step N is a step of lowering the projection unit of the uppermost projection type video display device to the ground. The second step N is a step of taking out the light source utilization device including the light source from the casing of the projection unit. The light source utilization device is a projection device that projects an image or a light source device that emits light. The third step N is a step of releasing the fixation between the light source utilization device and the light source.

  The fourth step N is a step of replacing the light source. The fifth step N is a step of fixing the light source to the light source utilization device again. The sixth step N is a step of returning the light source utilization device into the housing of the projection unit. The seventh step N is a step of returning the projection unit to the uppermost projection display apparatus.

  On the other hand, when the light source is replaced in the video display system 1000 according to the present embodiment, it is only necessary to perform the following first to third steps B. The first step B is a step for releasing the connection between the casing 111 (heat radiation unit 120) and the casing 111 by the connection configuration (holes H5b, H5a) of the uppermost image projection apparatus 100. The second step B is a step of replacing the light source. The third step B is a step of connecting the casing 121 (heat radiation unit 120) of the uppermost image projection apparatus 100 to the casing 111 again. That is, according to the present embodiment, it is possible to easily (simplely) replace the light source with fewer steps than in the past.

  In the replacement of the light source in the video display system 1000, the casing 121 of the heat dissipation unit 120 corresponding to the replacement light source 10 is removed from the casing 111 without lowering the projection unit to the ground as in the past. The light source 10 to be replaced may be replaced.

  In addition, as described above, the projection 527 and the groove 526 of the housing 500 are arranged so that the video projection device 100 is Y when the projection 527 is fitted in the groove 126 and the projection 127 is fitted in the groove 526. It is configured to be movable in the axial direction. With this configuration, the housing 121 of the heat dissipation unit 120 can be easily guided to a desired mounting position even at a high place.

  As described above, according to the video display system 1000 of the present embodiment, the casing 500 of each of the projection type video display devices 300A, 300B, and 300C that houses the video projection device 100 has a vertical direction (Z-axis). A duct 501 and a duct 502 extending in the direction) are provided. Duct 501 and duct 502 are provided so as to sandwich opening H50. Each of the duct 501 and the duct 502 extends along the vertical direction (Z-axis direction). In addition, each of the duct 501 and the duct 502 is provided so as to penetrate the housing 500.

  In addition, the air inlet H51 of the duct 501 is connected to the air inlet H21 of the housing 121 of the video projection device 100 in the accommodated state in which the video projection device 100 is accommodated in the opening H50 of the housing 500. The exhaust port H52 of the duct 502 is connected to the exhaust port H22 of the housing 121 of the video projection device 100 in the accommodated state.

  In addition, the projection display devices 300A, 300B, and 300C are arranged so as to be adjacent in the vertical direction. Further, the projection type video display devices 300A and 300B are configured such that the duct 501 of the projection type video display device 300A is connected to the duct 501 of the projection type video display device 300B adjacent to the projection type video display device 300A in the vertical direction, and It arrange | positions so that the duct 502 of the projection type video display apparatus 300A may be connected with the duct 502 of the projection type video display apparatus 300B. The projection type video display devices 300B and 300C are also arranged in the same manner as the projection type video display devices 300A and 300B.

  With the above configuration, the light source 10 can be cooled without taking in dust into the projection unit 110 even in the video display system 1000 including the plurality of projection type video display devices 300.

  Further, in the video display system 1000, the operator only performs an operation for releasing the connection between the casing 111 and the casing 121 without lowering the projection unit 110 to the ground, and the light source exposed from the opening H11. 10 can be exchanged easily. In addition to the light source 10, the operator can easily replace the radiator 50 (heat sink), the cooling mechanism 60 (cooling fan), and the like through the opening H11.

  Further, the exhaust efficiency of the video display system 1000 can be improved by the function as a chimney of an exhaust path in which a plurality of ducts 502 are connected. As a result, the cooling efficiency of each light source 10 in the video display system 1000 can be improved. Therefore, when the same cooling efficiency is maintained, the amount of cooling air generated by the cooling mechanism 60 (cooling fan) can be reduced. Thereby, low noise and low power consumption of the cooling mechanism 60 can be realized. Further, by improving the cooling efficiency of the light source 10, it is possible to realize a long life and high brightness of the light source 10.

  In addition, as described above, the projection 527 and the groove 526 of the housing 500 are arranged so that the video projection device 100 is Y when the projection 527 is fitted in the groove 126 and the projection 127 is fitted in the groove 526. It is configured to be movable in the axial direction. With this configuration, the housing 121 of the heat radiating unit 120 of the upper image projection apparatus 100 can be easily guided to a desired mounting position.

  In the present embodiment, the video display system 1000 is composed of the three projection video display devices 300, but is not limited to this. As shown in FIG. 10, the video display system 1000 may be composed of, for example, nine projection video display devices 300.

  FIG. 10 is a diagram showing a configuration in which nine projection video display devices 300 are arranged in a matrix. Specifically, FIG. 10 is a diagram illustrating a configuration in which nine projection video display devices 300 are arranged in three rows and three columns (hereinafter also referred to as configuration C). In addition, each projection type video display apparatus 300 corresponding to each column of the configuration C is arranged similarly to the configuration of FIG. 10 is a perspective view so that the internal structure of the video display system 1000 can be understood, as in FIG.

  In the video display system 1000 of the configuration C, three projection video display devices 300 that are part of the nine projection video display devices 300 are arranged so as to be adjacent in the vertical direction. In the configuration of FIG. 10, air flows in each projection type video display device 300 corresponding to each column, as in FIG. 8.

  As described above, in the video display system 1000 of the configuration C, the exhaust air from the duct 502 of a certain casing 500 is sent to the duct 501 of another casing 500 adjacent to the casing 500 in the X-axis direction. There is no. Therefore, only fresh air is sent to the duct 501 provided in the casing 500 of the lowermost projection display apparatus 300 corresponding to each row.

  Further, in the video display system 1000 of the configuration C, the same effect as that of the configuration of FIG. 8 can be obtained. For example, the duct 502 of each projection type image display device 300 corresponding to each row can display the image without confining the exhaust air from the casing 121C (heat radiation unit 120) connected to the duct 502 in the casing 500. It can be taken out of the display system 1000. Further, in the video display system 1000 of the configuration C, the light source 10 can be cooled without taking dust into the projection unit 110 as in the first embodiment.

  In addition, when replacing the light source of the uppermost projection type video display device in the configuration in which a plurality of projection type video display devices are arranged in the vertical direction as in the related art B, the projection unit having the light source is extracted, It is necessary to replace the light source after taking it down to the ground. Therefore, there has been a problem that the replacement work takes time.

  On the other hand, since the video display system 1000 according to the present embodiment is configured as described above, the above-described problems can be solved.

  It should be noted that the present invention can be freely combined with each other within the scope of the invention, and each embodiment can be appropriately modified or omitted.

  DESCRIPTION OF SYMBOLS 10 Light source, 20 Thermal conductor, 30 Heat receiving part, 40 Radiation fin, 50 Radiator, 60 Cooling mechanism, 70 Projection lens, 80 Buffer material, 100 Image projection apparatus, 110 Projection unit, 111, 121, 121A, 121B, 121C , 500 housing, 120, 120A, 120B, 120C heat dissipation unit, 126,526 groove, 127,527 projection, 300, 300A, 300B, 300C projection type image display device, 400 screen, 400A multi-screen, 501, 502 duct, 1000 Video display system, H5a, H5b hole, H11, H23, H50 opening, H21, H51 air inlet, H22, H52 air outlet.

Claims (9)

An image projection device that emits image light constituting an image,
A light source;
A first housing that houses at least a portion of the light source;
A second housing,
The first casing is provided with a first opening that exposes another part of the light source to the outside of the first casing.
The first casing and the second casing are connected to the first casing and the second casing via a cushioning material, and the first casing and the second casing are connected to each other. A connection configuration for selectively generating an unconnected state in which the second housing is not connected;
The video projection device further includes:
A radiator that is housed in the second housing and that is thermally coupled to the light source via a thermal conductor in the connected state;
A cooling mechanism housed in the second housing and sending cooling air to the radiator,
The second casing is provided with a second opening for thermally coupling the light source and the radiator in the connected state,
The said light source is comprised from the said video projection apparatus so that attachment or detachment is possible through the said 1st opening part in the said unconnected state. Video projection apparatus. The video projection device according to claim 1, wherein the connection configuration is a hole into which the screw is inserted for selectively generating the connection state and the non-connection state by a screw. The second casing has an intake port for taking the outside air of the second casing as the cooling air into the second casing, and for discharging the cooling air to the outside of the second casing. The video projection device according to claim 1, wherein an exhaust port is provided. The video projection device according to claim 1, wherein the second casing is made of a plastic material having a function of absorbing sound. The video projector is provided with a plurality of the second housings,
The plurality of second housings are configured to be connectable,
The plurality of second housings include one of the second housings adjacent to each other and the other second housing when connected,
A groove is provided on a side surface of the one second casing,
5. The video projection according to claim 1, wherein a projection that fits into the groove is provided on a side surface of the other second housing that faces a side surface of the one second housing. 6. apparatus. The groove and the protrusion are configured such that either the one second housing or the other second housing can be moved in a specific direction with the protrusion fitted in the groove. The video projection device according to claim 5. A projection-type image display device that displays an image represented by the image light emitted by the image projection device according to claim 5 or 6,
A third housing provided with a third opening for accommodating the video projection device with the second housing of the video projection device exposed to the outside;
The third casing is provided with a first duct and a second duct extending in a vertical direction,
The first duct and the second duct are provided so as to sandwich the third opening,
The first duct includes another intake port connected to the intake port of the second housing in the accommodated state in which the video projection device is accommodated in the third opening.
The second duct includes another exhaust port connected to the exhaust port of the second housing in the accommodated state,
The third housing is provided with another projection that fits into the groove of the video projection device and another groove that fits into the projection of the video projection device. The image projection device moves in the specific direction in a state in which the another protrusion is fitted in the groove and the protrusion is fitted in the another groove. The projection type image display device according to claim 7, wherein the projection type image display device is configured to be freely configured. A video display system configured by using a plurality of projection-type video display devices according to claim 7 or 8,
The first duct and the second duct of each of the plurality of projection type image display devices extend along a vertical direction and are provided so as to penetrate the third housing,
A part or all of the plurality of projection type video display devices are arranged so as to be adjacent in the vertical direction,
The plurality of projection type video display devices may be configured such that the first duct of the specific projection type video display device is adjacent to the specific projection type video display device in the vertical direction. An image display system that is connected to the first duct and that is arranged such that the second duct of the specific projection display apparatus is connected to the second duct of the other projection display apparatus. .

Images