JP4182845B2 - Display device - Google Patents

Description

  The present invention relates to a display device that displays an image, and more particularly, to a display device that includes a cooling mechanism that cools an optical mechanism for displaying an image.

  In recent years, display devices having various display mechanisms are known as display devices for displaying images. As this display device, recently, for example, a projection display device (so-called projector) that displays an image by projecting image light onto a projection target (for example, a screen) is becoming widespread.

  This projector mainly includes an optical mechanism that displays an image and a cooling mechanism that cools the optical mechanism inside a housing. In this type of projector, the optical mechanism generates heat when displaying an image, and heat tends to be stored around the optical mechanism having a high mounting density. Therefore, in order to effectively cool the optical mechanism using a small space, The cooling mechanism includes a single-sided intake sirocco fan having a high static pressure. In this type of cooling mechanism, for example, in order to increase the intake efficiency, the intake surface of the sirocco fan faces the intake window provided on one surface of the housing, and the air is sucked into the sirocco fan through the intake window. Outside air is blown toward the optical mechanism as cooling air.

  By the way, from the viewpoint of the user who uses the projector, it is preferable that no operation sound (operation noise) is generated as much as possible when the projector is used. However, in a conventional projector, due to structural factors that the intake surface of the sirocco fan faces the intake window, the motor sound generated when the sirocco fan rotates and when the sirocco fan draws outside air from the intake surface Since the generated wind noise easily leaks from the intake window to the outside, there is a problem that it is difficult to sufficiently reduce the operating noise.

Several configuration examples have already been proposed for projectors aimed at reducing the operating noise. Specifically, for example, a projector having a configuration in which an air intake window is provided on a side surface of a housing and an air intake surface of a sirocco fan faces upward is known (see, for example, Patent Document 1). However, although a projector having this type of configuration is certainly useful in reducing the operating noise, it can be said that the effect of reducing the operating noise is sufficient if the operating noise level actually requested by the user is taken into consideration. There is still room for improvement.
JP 2003-005291 A

  As a measure for reducing the operating noise, in addition to configuring the projector as described above, for example, the intake surface of the sirocco fan is shifted laterally with respect to the intake window, that is, the intake surface does not face the intake window. It is conceivable to arrange a sirocco fan on the top and connect the intake surface and the intake window with a dedicated duct. However, in this case, pressure loss occurs in the process of introducing outside air from the intake window to the intake surface through the duct, and thus the amount of cooling air blown easily decreases. In addition, in this case, a space for installing the duct is required, which leads to an increase in the size of the projector, and the intake window must be installed in an area excluding the installation space of the duct. Cannot be secured.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a display device capable of reducing operation noise as much as possible.

A display device according to the present invention includes an optical mechanism that displays an image and a cooling mechanism that cools the optical mechanism inside a casing, and the cooling mechanism has a single air intake surface. And an intake passage that constitutes a storage space for storing the blowing means together with one surface of the housing provided with the intake window and that constitutes an intake passage for guiding outside air introduced through the intake window to the intake surface of the blowing means and a structure member, feed air unit, which blows air toward the optical mechanism by inhaling external air introduced through the intake Kimado from the intake plane, the intake surface, the opposite side to the inlet window The intake path constituting member is provided along the outer periphery of the planar shape of the air blowing means, and guides outside air to the air intake surface through a gap provided between the air blowing means and the side surface of the air blowing means .

  In the display device according to the present invention, since the intake surface of the blower means faces away from the intake window, the intake surface is different from the intake window, unlike when the intake surface of the blower means faces the intake window. A sufficient distance is secured between the intake surface and the intake window. In this case, even if wind noise is generated near the intake surface of the blower means due to rapid flow of outside air or turbulence, the wind noise is attenuated in the process from the vicinity of the intake surface to the intake window. The wind noise due to the presence of the intake window in the vicinity of the intake surface of the air blowing means is less likely to be generated, and the volume of the wind noise is suppressed. As a result, the absolute volume of wind noise leaking outside through the intake window is reduced.

According to the display device of the present invention, the air intake surface of the air blowing means faces the opposite side with respect to the air intake window , and the air intake path constituting member provided along the planar outer periphery of the air blowing means is the air blowing means. Since the outside air is guided to the air intake surface through the gap between the air intake side and the air flow , the absolute volume of the wind noise leaking to the outside through the air intake window during operation of the air blowing means is reduced . For this reason, operation noise can be reduced as much as possible.

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

  First, a configuration of a display device according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows an external configuration of the display device. 2 and 3 show the internal configuration of the display device shown in FIG. 1. In FIG. 3, main components are mutually connected to make the positional relationship of the internal configuration of the display device shown in FIG. The separated state is shown. In the following, the front side in the Y-axis direction shown in FIGS. 1 to 3 is referred to as “front” or the back side as “rear”, and the upper side in the Z-axis direction is referred to as “upper” or the lower side as “lower”. To do.

  The display device shown in FIGS. 1 to 3 is, for example, a projection display device (so-called projector) that displays an image by projecting image light onto a projection target (for example, a screen). Is a liquid crystal projector that converts light emitted from a light source into light for video using a liquid crystal drive mechanism (liquid crystal panel).

  For example, as shown in FIG. 1, the display device includes an upper case 11 and a lower case 12, and a projection window 13 is provided at a location corresponding to a projection lens 26 (see FIGS. 2 and 3) described later. An optical device or an optical component for displaying an image is mounted inside the casing 10 having a box-shaped structure. On the lower surface of the casing 10 (lower case 12), for example, as shown in FIG. 3, an inlet 12K is provided at a location corresponding to a cooling mechanism 30 (see FIGS. 2 and 3) described later. An intake cover 12C provided with an intake window 12W for intake is detachably attached to the intake port 12K via an intake filter 14. The lower surface of the casing 10 (lower case 12) provided with the intake window 12W is, for example, when the casing 10 is placed on a predetermined support (for example, a table). 10 is a surface facing the support body.

  The display device includes an optical mechanism 20 that displays an image and a cooling mechanism 30 that cools the optical mechanism 20, as shown in FIGS. 2 and 3, for example. The optical mechanism 20 and the cooling mechanism 30 are both installed on the lower case 12. On the lower case 12, for example, the optical mechanism 20 is disposed in the vicinity of one corner (for example, the corner on the left back side), and the cooling mechanism 30 is relative to the corner where the optical mechanism 20 is disposed. It is arranged near the opposite corner (for example, the corner on the right front side) located on the diagonal. 2 and 3, the upper case 11 is not shown.

  The optical mechanism 20 includes, for example, a light source unit 21 that emits light, and an optical unit 24 that converts light emitted from the light source unit 21 into image light.

  The light source unit 21 has, for example, a configuration in which the light source 23 is held by a unit case 22 having a holder-like structure while being supported by a reflector (not shown). The light source 23 emits white light, and is a mercury lamp, for example. An opening for guiding light emitted from the light source 23 to the optical unit 24 is provided on the side surface of the unit case 22, and a light transmitting lens (not shown) is attached to the opening.

  The optical unit 24 has, for example, a box-like structure, and has a configuration in which a color composition color synthesis device 27 is accommodated in a unit case 25 in which a projection lens 26 for image projection is attached to the front surface. ing.

  The color synthesizer 27 synthesizes the light guided from the light source unit 21, more specifically, three types of light (R (Red), G (Green), and B (Blue)) corresponding to the three primary colors. To convert it into light for video. The color composition device 27 includes, for example, three liquid crystal panels 28R, 28G, and 28B for forming video patterns corresponding to three types of light, and a color composition prism (4P prism) 29 for color composition. It is stored in a storage space 25S provided so as to open on the upper surface side of the unit case 25. An opening for introducing light from the light source unit 21 is provided on a side surface of the unit case 25, and a light transmitting lens (not shown) is attached to the opening. The unit case 25 can be connected to the unit case 22 so that the light transmitting lenses described above face each other. In the unit case 25, other optical components are housed together with the color synthesizing device 27. The other optical components will be described later (see FIG. 6).

  The cooling mechanism 30 supplies outside air to the optical mechanism 20 as cooling air by introducing outside air from the outside through an intake window 12W provided on one surface (lower surface) of the housing 10 (lower case 12). For example, the air intake duct 32 and the air duct 33 that constitute the outside air guide path are provided, and the sirocco fan 31 is housed inside the air intake duct 32.

  The sirocco fan 31 has an intake surface 31M on one of two surfaces (upper surface and lower surface) facing each other, that is, a single-sided intake type fan having one intake surface 31M. The sirocco fan 31 has a function as a blowing means for blowing outside air sucked from the intake surface 31M via the intake duct 32 as cooling air to the optical mechanism 20 via the blow duct 33.

  The intake duct 32 forms a storage space 32S for storing the sirocco fan 31 together with one surface (lower surface) of the housing 10 (lower case 12) provided with the intake window 12W, and the outside air introduced through the intake window 12W. Is an intake passage constituting member constituting the intake passage 32T for guiding the air to the intake surface 31M of the sirocco fan 31. The intake duct 32 has, for example, a substantially box-like structure that covers the sirocco fan 31 from above and from the side, and is disposed in an area corresponding to the installation area of the intake window 12W.

  The blower duct 33 is a blower path constituent member that communicates with the intake duct 32 and forms a blower path 33 </ b> T for guiding the outside air blown from the sirocco fan 31 to the optical mechanism 20. The air duct 33 has a duct structure extending from the installation position of the sirocco fan 31 to the installation position of the color synthesizing device 27 in the optical mechanism 20, and the one end side of the extended duct has a color. Three air outlets 33KR, 33KG, which are located corresponding to the three liquid crystal panels 28R, 28G, 28B constituting the synthesizer 27, and for blowing outside air to the liquid crystal panels 28R, 28G, 28B independently of each other. 33KB is provided.

  Here, with reference to FIGS. 1-5, the structure of the cooling mechanism 30 which is the characteristics of this invention is demonstrated in detail. 4 and 5 show an enlarged cross-sectional configuration of the cooling mechanism 30 and its peripheral structure shown in FIGS. 2 and 3, and FIG. 4 is taken along line IV-IV (XZ plane) shown in FIG. FIG. 5 shows a cross-sectional configuration along the XY plane. In addition, the dashed-dotted arrow G shown in FIG. 4 represents the flow of outside air.

  As shown in FIG. 4, the intake surface 31 </ b> M of the sirocco fan 31 faces the opposite side with respect to the intake window 12 </ b> W provided above, that is, on one surface (lower surface) of the housing 10 (lower case 12). A rib 12R as a support pillar for supporting the sirocco fan 31 away from the intake window 12 is provided inside the housing 10, that is, around the intake window 12W of the lower case 12, and the sirocco fan is provided. 31 is lifted from the lower case 12 by the rib 12R, and an intake space (first intake space) 32S1 constituting a part of the storage space 32S is secured between the sirocco fan 31 and the intake window 12W. For example, the rib 12R is integrally formed with the lower case 12, and the interval V between the sirocco fan 31 lifted by the rib 12R and the intake window 12W is about 10 mm. However, the interval V can be freely changed as necessary. In FIG. 4, only one rib 12 </ b> R is shown because of the cross-sectional configuration, but actually, a plurality of ribs 12 </ b> R sufficient to stably support the sirocco fan 31 are provided in the lower case 12. Is provided.

  The surface (upper surface) of the intake duct 32 that faces the intake surface 31M of the sirocco fan 31 is separated from the intake surface 31M as shown in FIG. 4, for example, and the upper surface and the intake surface of the intake duct 32 are separated. An intake space (second intake space) 32S2 constituting another part of the storage space 32S is secured between the storage space 32S and 31M. For example, as shown in FIG. 5, the intake duct 32 is located between the sirocco fan 31 along the outer periphery of the planar shape of the sirocco fan 31 having a plurality of screw fixing protrusions (attachment portions) 31 </ b> F. As shown in FIG. 4, as a guide path for the outside air G, the outside air G is sucked into the sirocco fan 31 via the intake space 32S1, the gap P, and the intake space 32S2 in this order. It leads to the surface 31M. The intake space 32S1, the gap P, and the intake space 32S2 are, for example, large enough that the intake space 32S1 can sufficiently introduce the outside air G into the intake duct 32 and can secure an intake window 12W having a sufficient area in the lower case 12. The gap P is an interval at which the outside air G can be sufficiently guided from the intake space 32S1 to the intake space 32S2, and the intake space 32S2 can sufficiently suck the outside air G into the intake surface 31M and is intended in the vicinity of the intake surface 31M. It is preferable that the size is such that no wind noise is generated. On the side surface of the intake duct 32, an opening 32 </ b> K for guiding the outside air G to the blower duct 33 is provided at a position corresponding to the height position of the sirocco fan 31.

  For example, as shown in FIG. 4, the air duct 33 is connected so as to communicate with an opening 32 </ b> K provided on the side surface of the intake duct 32, and extends downward along the lower case 12 from the opening 32 </ b> K. After bending, the outside air G is extended so as to be blown upward through the air blowing ports 33KR and 33KB. In addition, the ventilation path | route of the ventilation duct 33 mentioned above regarding the ventilation ports 33KR and 33KB is the same also regarding the ventilation port 33KG which is not shown in FIG.

  Next, a detailed configuration of the optical mechanism 20 will be described with reference to FIGS. 3 and 6. FIG. 6 is a diagram schematically illustrating a detailed configuration of the optical mechanism 20.

  3 and 6, the optical mechanism 20 includes a light source unit 21 (unit case 22, light source 23) and an optical unit 24 (unit case 25, projection lens 26, color composition device 27 (liquid crystal panels 28R, 28G). , 28B, and a color synthesizing prism 29)). In particular, as shown in FIG. 6, the optical unit 24 is disposed inside the unit case 25 together with the above-described color synthesizing device 27 from the light source 23. Reflecting mirrors 41R and dichroic mirrors 41G and 41B arranged in order of distance from the light source 23 on the optical path of the irradiated light L1, and reflecting mirrors 42 and 43 arranged corresponding to the reflecting mirror 41R and the dichroic mirror 41B, respectively. And is housed.

  The color composition device 27 is arranged such that the front surface of the color composition prism 29 having a substantially cubic structure faces the projection lens 26, and the liquid crystal panels 28R, 28G, and 28B are arranged on the remaining left side surface, rear surface, and right side surface, respectively. It has a configuration.

  The dichroic mirror 41B functions as a half mirror for wavelength separation by being inclined with respect to the optical path of the light (white light) L1 emitted from the light source 23, that is, the blue color from the light L1. The light L1B is separated and reflected to guide the reflection mirror 43, and the remaining light except the blue light L1B is transmitted to the dichroic mirror 41G. The reflection mirror 43 is for reflecting the light L1B separated by the dichroic mirror 41B and guiding it to the liquid crystal panel 28B.

  The dichroic mirror 41G has substantially the same configuration and function as the dichroic mirror 41B. In other words, the green light L1G is separated from the light transmitted through the dichroic mirror 41B and reflected to the liquid crystal panel 28G. The remaining light is transmitted to the reflection mirror 41R. The dichroic mirror 41G is disposed, for example, corresponding to the liquid crystal panel 28G. That is, unlike the other reflection mirror 41R and the dichroic mirror 41B, the light L1G is not transmitted through the reflection mirrors 42 and 43, but the liquid crystal panel 28G. It is arranged so that it can lead directly to.

  The reflection mirror 41R guides the light transmitted through the dichroic mirror 41G, that is, the red light L1R, to the reflection mirror 42 by reflecting the light. The reflection mirror 42 is for reflecting the light L1R separated by the reflection mirror 41R and guiding it to the liquid crystal panel 28R.

  In addition to the series of optical components described above, other optical components (not shown) are also stored in the unit case 25 of the optical unit 24. Examples of the “other optical component” include a condensing lens and a polarizing plate.

  Next, the operation of the display device will be described with reference to FIGS.

  In this display device, as shown in FIGS. 1 to 3, in the optical mechanism 20 housed in the housing 10, the light emitted from the light source 23 of the light source unit 21 by the optical unit 24 is used as the image light. Then, the image light is projected onto an external screen through the projection window 13 provided in the housing 10 to display the image.

  More specifically, as shown in FIG. 6, the light L1 emitted from the light source 23 is transmitted through the reflection mirror 41R and the dichroic mirrors 41G and 41B with three colors corresponding to the three primary colors, that is, the reflection mirror 41R. When separated into a red light L1R that has passed through, a green light L1G that has passed through the dichroic mirror 41G, and a blue light L1B that has passed through the dichroic mirror 41B, the light L1R, L1G, and L1B is liquid crystal corresponding to the image. After passing through the three liquid crystal panels 28R, 28G, and 28B oriented, they are synthesized by the color synthesis prism 29 to be converted into full-color video light L2.

  At this time, since light concentrates on the color composition device 27 during operation of the optical mechanism 20, the cooling air is blown from the sirocco fan 31 housed in the intake duct 32 of the cooling mechanism 30 through the air duct 33. As a result, the color composition device 27 is cooled.

  More specifically, as shown in FIG. 4 and FIG. 5, in accordance with the rotational driving operation of the sirocco fan 31, the intake duct 32 is provided inside the intake duct 32 (the intake space 32 </ b> S <b> 1) through the intake window 12 </ b> W provided in the lower case 12. When the outside air G is introduced, the outside air G is sucked into the intake surface 31M of the sirocco fan 31 via the intake passage 32T, that is, the intake space 32S1, the gap P, and the intake space 32S2. Then, the outside air G sucked by the sirocco fan 31 from the intake surface 31M is blown as the cooling air through the air passage 33T in the air duct 33, so that the air G is provided on one end side of the air duct 33. The three air outlets 33KR, 33KG, 33KB are supplied to the three liquid crystal panels 28R, 28G, 28B constituting the color composition device 27. Accordingly, the outside air G is used to cool the liquid crystal panels 28R, 28G, and 28B having high light concentration.

  In the display device according to the present embodiment, the intake surface 31M of the sirocco fan 31 faces upward, that is, faces the opposite side to the intake window 12W provided on the lower surface of the housing 10 (lower case 12). Therefore, unlike the conventional display device in which the intake surface of the sirocco fan faces the intake window for the following reasons, the operation noise can be reduced as much as possible.

  That is, in the vicinity of the intake surface 31M of the sirocco fan 31, generally, the flow rate of the outside air G becomes maximum and the outside air G tends to turbulent with the rotational driving operation of the sirocco fan 31, so Wind noise is likely to occur due to the turbulent phenomenon. Regarding the extent of the wind noise, especially when there is an obstacle that hinders the flow of the outside air G near the intake surface 31M, the volume of the wind noise increases due to the phenomenon that the outside air G flows around the obstacle. Become.

  Considering the generation factors and generation levels of these wind noises, in the conventional display device in which the intake surface of the sirocco fan faces the intake window, the intake surface is close to the intake window. Wind noise generated due to the flow and turbulent phenomenon is likely to leak outside through the intake window. Further, in the conventional display device, an intake window (specifically, a lattice plane of the casing constituting the intake window) that is an obstacle to the outside air exists in the vicinity of the intake surface. As a result, wind noise is likely to occur, and the volume of the wind noise increases. In this case, since the amount of wind noise leaks is large and the volume of the wind noise increases, it is difficult to reduce operation noise.

  On the other hand, in the display device of the present embodiment in which the intake surface 31M of the sirocco fan 31 faces the opposite side to the intake window 12W, the conventional display device in which the intake surface of the sirocco fan faces the intake window. As compared with the intake surface 31M, the intake surface 31M is moved away from the intake window 12W, and a sufficient distance between the intake surface 31M and the intake window 12W (specifically, the distance passing through the intake space 32S1, the gap P, and the intake space 32S2). Therefore, even if wind noise is generated in the vicinity of the intake surface 31M due to a rapid flow or turbulence phenomenon of the outside air G, the wind noise is attenuated in the process from the intake surface 31M to the intake window 12W. However, it is difficult to leak from the intake window 12W. Also, in the display device of the present embodiment, unlike the conventional display device, since the intake window 12W does not exist in the vicinity of the intake surface 31M, it is difficult for wind noise due to the presence of the intake window 12W to occur. The volume of wind noise is also sufficiently suppressed. Therefore, in the present embodiment, the amount of wind noise leaks is reduced, and the volume of the wind noise is suppressed, and as a result, the absolute volume of wind noise leaking outside from the intake window 12W is reduced. In contrast, the operating noise can be reduced as much as possible.

  For reference, a known display device, that is, a housing, in which a specific configuration example is given in the section “Problem to be Solved by the Invention” in the above “Problem to be Solved by the Invention” When the intake window is provided on the side of the display, compared with the operation noise reduction effect related to the display device in which the sirocco fan is arranged so that the air intake surface faces upward, the operation noise reduction effect is known. This is significantly higher in the display device of this embodiment than in the display device. Because the distance between the intake surface and the intake window is larger in the display device of the present embodiment than in the known display device, wind noise generated due to the rotational drive operation of the sirocco fan is generated from the intake window. This is because it is more difficult to leak outside.

  In particular, in the present embodiment, as described above, since the intake surface 31M of the sirocco fan 31 faces the opposite side to the intake window 12W, for example, without intention from the housing 10 when the display device is used. When the intake cover 12C is removed, the intake surface 31M of the sirocco fan 31 that is rotationally driven is not exposed to the opening 12K of the housing 10. Therefore, unlike the conventional case where the intake surface of the sirocco fan faces the intake window and the intake surface is exposed at the opening of the housing when the intake cover is removed, the user who uses the display device can select the intake surface 31M. Touching can prevent injury. When the intake cover 12C is removed from the housing 10, even if the intake surface 31M of the sirocco fan 31 faces the opposite side to the intake window 12W, the user can connect the sirocco fan 31 and the intake duct 32 to each other. There is a possibility of touching the intake surface 31M through the gap P between them. For example, a sufficient amount of outside air G can be guided from the intake window 12W to the intake surface 31M, and the user cannot pass the fingertip. If the interval of P is adjusted, the risk of injury to the user can be prevented without reducing the induction efficiency of the outside air G.

  In the present embodiment, the outside air G introduced into the intake duct 32 from the intake window 12W passes through the intake space 32S1 below the sirocco fan 31, the side gap P, and the intake air space 32S2 above. That is, since the air is guided to the intake surface 31M along the periphery of the sirocco fan 31, the intake surface and the intake window are connected by a dedicated duct as illustrated in the above section “Problem to be Solved by the Invention”. Unlike the case, the outside air G is guided from the intake window 12W to the intake surface 31M at a shortest distance. Therefore, it is possible to suppress the pressure loss of the outside air G and to secure the amount of the outside air G as the cooling air.

  Further, in the present embodiment, as described above, the duct is used based on the point that the operation noise can be reduced without connecting the intake surface 31M and the intake window 12W with a dedicated duct. Compared to the case, the space for installing the duct is not required, so that the display device can be prevented from being enlarged, and the intake window 12W does not need to be installed in the area excluding the installation space for the duct. A sufficient installation space for the intake window 12W can be secured. In particular, if the installation space for the intake window 12W is sufficiently secured, for example, even if the introduction efficiency of the outside air G introduced from the intake window 12W is reduced due to, for example, clogging of the intake filter 14, the whole is sufficient. Since a sufficient amount of the outside air G can be introduced from the intake window 12W, it is possible to contribute to securing the amount of the outside air G from this viewpoint.

  In the present embodiment, the rib 10R is provided on the housing 10 (lower case 12) and the sirocco fan 31 is lifted to separate the sirocco fan 31 from the intake window 12W. A larger distance is secured from the intake window 12W, and the sirocco fan 31 is further away from the intake window 12W. Therefore, the intake surface 31M of the sirocco fan 31 that induces wind noise is further away from the intake window 12W, and the wind noise is less likely to leak from the intake window 12W, so that the operation noise can be greatly reduced. In this case, in particular, since the sirocco fan 31 is separated from the intake window 12W, motor sound generated during the rotational drive operation of the sirocco fan 31 is less likely to leak from the intake window 12W. Can also contribute to the reduction of operation noise.

  In this case, in particular, since the sirocco fan 31 is lifted by the ribs 12R, a sufficiently large intake space 32S1 is secured between the sirocco fan 31 and the intake window 12W. Therefore, the intake space 32S1 is used. Thus, a sufficient amount of outside air G can be introduced from the intake window 12W. In addition, since the intake space 32S1 is sufficiently secured, the area of the intake port 12 (that is, the area of the intake filter 14) is sufficiently secured, so that the intake efficiency of the outside air G through the intake window 12W is improved. For example, it is possible to extend the service life of the intake filter 14 in consideration of clogging or the like. If the area of the intake filter 14 is specifically illustrated, the area of the intake filter 14 can be about 1.5 to 2 times the area of the intake surface 31M of the sirocco fan 31. Further, as an effect based on prolonging the service life of the intake filter 14, for example, the intake filter 14 is a sponge filter or a chargeable / electrostatic filter, and the intake filter 14 is about every 500 hours to 1000 hours. If the replacement is performed, for example, a decrease in the blowing amount due to clogging or the like is effectively prevented, and the heat storage of the color composition device 27 (liquid crystal panels 28R, 28G, 28B) due to the reduction in the blowing amount is prevented. It is possible to improve the operational reliability of the display device.

  In the present embodiment, the surface of the intake duct 32 that faces the intake surface 31M of the sirocco fan 31 is separated from the intake surface 31M, and the surface of the intake duct 32 that faces the intake surface 31M and the intake air Since a sufficiently large intake space 32S2 is secured between the surface 31M and the intake space 12S, a sufficient amount of outside air G can be introduced from the intake window 12W. In addition, since there are no obstacles to the outside air G in the intake space 32S2, it is possible to suppress the generation of wind noise and also contribute to the reduction of operation noise from this viewpoint.

  In the present embodiment, the intake duct 32 is provided along the outer periphery of the sirocco fan 31 having an uneven planar shape provided with the attachment portion 31 </ b> F, and the outside air is provided between the sirocco fan 31 and the intake duct 32. Since the guide gap P is secured, the uneven planar shape of the sirocco fan 31 is effectively utilized, and the planar shape of the intake duct 32 is determined based on the uneven planar shape of the sirocco fan 31. Therefore, in order to secure the clearance P between the sirocco fan 31 and the intake duct 32, the occupied area of the intake duct 32 can be made as small as possible, so the installation space for the intake duct 32 is reduced. Thus, the entire display device can be reduced in size.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and can be freely modified as long as the same effect as the embodiment can be obtained. It is. Specifically, for example, in the above embodiment, the configuration of the cooling mechanism 30 (sirocco fan 31, intake duct 32, and air duct 33) has been described with reference to FIGS. As long as it is possible to obtain the same effect as that of the above embodiment based on the structural feature that the intake surface 31M of the sirocco fan 31 faces the opposite side to the intake window 12W, the cooling mechanism 30 is not limited. The configuration of can be freely changed.

  In the above embodiment, the case where the intake window 12W is provided on the lower surface of the casing 10 (lower case 12) and the intake surface 31M of the sirocco fan 31 faces upward has been described. As long as the intake surface 31M of the sirocco fan 31 faces the opposite side to the intake window 12W, the installation position of the intake window 12W in the housing 10 and the direction of the intake surface 31M of the sirocco fan 31 are free. Can be changed. Specifically, for example, when the intake window 12W is provided on the side surface of the housing 10 (upper case 11), the intake surface 31M of the sirocco fan 31 is opposite to the intake window 12W, That is, you may make it face the horizontal direction (lateral direction on the opposite side to the intake window 12W installation position). Even in this case, the same effect as the above embodiment can be obtained.

  In the above-described embodiment, the case where the present invention is applied to the projector has been described. However, the present invention is not necessarily limited thereto. For example, the present invention is applied to other devices including a single-sided intake sirocco fan as in the projector. Is possible. Even when the present invention is applied to other devices, the same effects as those of the above embodiment can be obtained.

  The display device according to the present invention can be applied to a display device such as a projector provided with a cooling mechanism.

It is a perspective view showing the external appearance structure of the display apparatus which concerns on one embodiment of this invention. It is a perspective view showing the internal structure of the display apparatus shown in FIG. FIG. 5 is another perspective view illustrating an internal configuration of the display device illustrated in FIG. 1. FIG. 4 is an enlarged cross-sectional view illustrating a cross-sectional configuration along the XZ plane of the cooling mechanism and its peripheral structure shown in FIGS. 2 and 3. FIG. 4 is an enlarged cross-sectional view illustrating a cross-sectional configuration along the XY plane of the cooling mechanism and its peripheral structure shown in FIGS. 2 and 3. It is a figure which represents typically the detailed structure of the optical mechanism shown in FIG. 2 and FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Housing, 11 ... Upper case, 12 ... Lower case, 12C ... Intake cover, 12K ... Intake port, 12R ... Rib, 12W ... Intake window, 13 ... Projection window, 14 ... Intake filter, 20 ... Optical mechanism, 21 ... Light source unit, 22, 25 ... Unit case, 23 ... Light source, 24 ... Optical unit, 25S, 32S ... Storage space, 26 ... Projection lens, 27 ... Color composition device, 28R, 28G, 28B ... Liquid crystal panel, 29 ... Color Synthetic prism, 30 ... cooling mechanism, 31 ... sirocco fan, 31F ... mounting portion, 31M ... intake surface, 32 ... intake duct, 32K ... opening, 32T ... intake passage, 33 ... air duct, 33KR, 33KG, 33KB ... air supply Mouth, 32S1, 32S2 ... Intake space, 33T ... Airflow path, 41G, 41B ... Dichroic mirror, 41R, 42, 43 ... Reflection mirror, G ... Outside air, L1 Light, L1B ... blue light, L1G ... green light, L1R ... red light, L2 ... light for video, P ... clearance, V ... interval.

Claims (8)

A display device including an optical mechanism for displaying an image inside the housing and a cooling mechanism for cooling the optical mechanism,
The cooling mechanism constitutes a storage space for storing the air blowing means together with the air blowing means having one air intake surface and one surface of the housing provided with the air intake window, and the outside air introduced through the air intake window. An intake passage constituting member constituting an intake passage for leading to the intake surface of the blowing means ,
The blowing means, before it is the outside air introduced through Ki吸 Kimado which blows air toward the optical mechanism by sucking from the suction surface, the suction surface is oriented opposite to the inlet window and,
The display device, wherein the intake passage constituting member is provided along a planar outer periphery of the air blowing unit and guides outside air to the air intake surface through a gap provided between the air blowing unit and a side surface of the air blowing unit . The intake path component A display device 請 Motomeko 1 wherein that are arranged in a region corresponding to the installation region of the inlet window. A surface of the intake path component member that faces the intake surface is spaced from the intake surface, and a space between the intake space and the surface of the intake path component member that faces the intake surface is defined between the intake surface and the intake space. display device of the first 請 Motomeko 1, wherein the intake space that is reserved for constituting a part. The cooling mechanism is further said communicates with the intake path component, wherein for guiding the outside air blown from the blower unit to the optical system of the air passage of the air flow passage constituting member constituting including請 Motomeko 1 according to Display device. The housing is provided with a support column for supporting the air blowing means apart from the air intake window, and constitutes another part of the storage space between the air blowing means and the air intake window. display device 請 Motomeko 1, wherein the second intake space that is reserved. The housing are placed on a predetermined support, said support display device 請 Motomeko 1, wherein said inlet window on opposite surfaces that are provided on one of the housing. The blowing means, one side intake type sirocco fan der Ru請 Motomeko 1 display device according to. The optical mechanism converts the light for image light emitted from the light source by using a liquid crystal panel, Der Ru請 Motomeko 1 wherein to display an image by projecting light for the video Display device.

Images