Projector

Abstract

To provide a projector capable of efficiently cooling of connected devices while suppressing the enlargement of the device configuration.SOLUTION: A light source unit includes: an exterior housing having a first accommodating part that detachably accommodates a connected device to be cooled which is a first object to be cooled, and a second accommodating part that accommodates a second object to be cooled; and a first fan accommodated in the exterior housing for cooling the first object to be cooled and the second object to be cooled by supplying airflow sucked from the outside of the exterior housing to the first and second accommodating parts in order. The first accommodating part is positioned at the inflow side of the airflow with respect to the first fan and the second accommodating part is positioned at the outflow side of the airflow with respect to the first fan.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a projector.

Background Art

[0002] Conventionally, there has been a projector that cools a wireless device (a device to be connected) that is detachably attached to an exterior housing by using an air flow taken into the exterior housing by an exhaust fan (see, for example, Patent Document 1 below).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above projector, since a part of the exhaust air after cooling the illumination optical system, the image forming unit, the light source device, etc. is used for cooling the device to be connected, it has been difficult to sufficiently cool the device to be connected. Therefore, it is also conceivable to separately provide a cooling device for cooling the device to be connected, but in this case, the device configuration becomes large.

Means for Solving the Problems

[0005] According to one aspect of the present invention, there is provided a projector including: an exterior housing having a first housing portion for housing a first object to be cooled, and a second housing portion for detachably housing a connected device which is a second object to be cooled, the second housing portion being separated from the first housing portion by a wall portion having a ventilation opening; and a first fan housed in the exterior housing for cooling the first object to be cooled and the second object to be cooled by supplying an air flow sucked from outside the exterior housing to the first housing portion and the second housing portion, wherein the second housing portion of the exterior housing is disposed on the air flow inlet side with respect to the first fan, and the first housing portion of the exterior housing is disposed on the air flow outlet side with respect to the first fan.

[0006] According to one aspect of the present invention, there is provided a projector including: an exterior housing having a first housing portion and a second housing portion separated from the first housing portion by a wall portion having a ventilation opening; a first object to be cooled housed in the first housing portion; a second object to be cooled which is a connected device detachably housed in the second housing portion; and an intake fan housed in the exterior housing for cooling the first object to be cooled and the second object to be cooled by an air flow sucked from outside the exterior housing, wherein the connected device is disposed on the air flow inlet side with respect to the intake fan, and the first object to be cooled is disposed on the air flow outlet side with respect to the intake fan.

Brief Description of the Drawings

[0007]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5A

Figure 5B

Best Mode for Carrying Out the Invention

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each of the following drawings, in order to make each component easy to view, the scale of the dimensions may be shown differently depending on the component.

[0009] FIG. 1 is a diagram showing the overall configuration of the projector of the present embodiment. The projector 1 of the present embodiment modulates the illumination light emitted from the light source device 2 to generate image light corresponding to the image information, and enlarges and projects the formed image light onto a projection surface such as a screen. As shown in FIG. 1, the projector 1 includes a light source device 2, an image forming device 3, a projection optical device 4, and an exterior housing 5.

[0010] Hereinafter, in the drawings, the XYZ orthogonal coordinate system will be used for explanation as necessary. The Z-axis is an axis along the vertical direction of the projector 1. The Y-axis is an axis parallel to the optical axis AX of the light projected from the projector 1. The X-axis is an axis orthogonal to the Y-axis and the Z-axis. In the present embodiment, the direction along the Z-axis is referred to as "vertical direction Z", +Z is referred to as "upper side", -Z is referred to as "lower side", the direction along the X-axis is referred to as "left-right direction X", +X is referred to as "right side", -X is referred to as "left side", and the direction along the Y-axis is referred to as "front-back direction Y", +Y is referred to as "front side", and -Y is referred to as "rear side" for explanation. Note that the vertical direction Z, the left-right direction X, and the front-back direction Y are merely names for explaining the arrangement relationship of the respective components of the projector 1, and do not define the actual installation posture and direction of the projector 1.

[0011] The light source device 2 is connected to a light source connection portion 10a provided in a case 10 of an image forming device 3 described later. The light source device 2 supplies white illumination light WL to the image forming unit 3A of the image forming apparatus 3. The light source device 2 of the present embodiment generates white illumination light WL including yellow fluorescence generated by wavelength-converting excitation light emitted from a light source module including a semiconductor laser with a phosphor and blue light transmitted through the phosphor. Note that the light source device 2 is not limited to a configuration using laser light, and an LED or a discharge lamp can also be used.

[0012] The image forming apparatus 3 generates image light using the illumination light WL emitted from the light source device 2. The image forming apparatus 3 includes a case 10, an image forming unit 3A housed in the case 10, and a color separation light guide optical system 31 housed in the case 10. The case 10 houses the image forming unit 3A and the color separation light guide optical system 31 while holding them in predetermined positions.

[0013] The image forming unit 3A includes light modulation panels 32R, 32G, 32B and a cross dichroic prism 34. Each of the light modulation panels 32R, 32G, 32B modulates the incident color light according to image information to form image light. Each of the light modulation panels 32R, 32G, 32B is configured by a light transmissive liquid crystal panel.

[0014] The light modulation panel 32R modulates red light LR according to image information to form image light corresponding to the red light LR. The light modulation panel 32G modulates green light LG according to image information to form image light corresponding to the green light LG. The light modulation panel 32B modulates blue light LB according to image information to form image light corresponding to the blue light LB.

[0015] The cross dichroic prism 34 synthesizes the respective image lights emitted from the light modulation panels 32R, 32G, 32B. The cross dichroic prism 34 has a substantially square shape in plan view formed by bonding four right-angled prisms, and a dielectric multilayer film is provided on a substantially X-shaped interface where the right-angled prisms are bonded together. The image forming unit 3A can generate full-color image light by synthesizing the image lights of each color.

[0016] In this embodiment, field lenses 33R, 33G, and 33B are provided on the light incident sides of the light modulation panels 32R, 32G, and 32B, respectively. The field lens 33R collimates the chief ray of the red light LR incident on the light modulation panel 32R. The field lens 33G collimates the chief ray of the green light LG incident on the light modulation panel 32G. The field lens 33B collimates the chief ray of the blue light LB incident on the light modulation panel 32B. Although not shown, incident side polarizing plates are disposed between each of the light modulation panels 32R, 32G, and 32B and each of the field lenses 33R, 33G, and 33B, and emission side polarizing plates are disposed between each of the light modulation panels 32R, 32G, and 32B and the cross dichroic prism 34.

[0017] The color separation light guide optical system 31 separates the illumination light WL from the light source device 2 into red light LR, green light LG, and blue light LB, and guides them to the light modulation panels 32R, 32G, and 32B, respectively. The color separation light guide optical system 31 includes a first dichroic mirror 311, a second dichroic mirror 312, a first reflection mirror 313, a second reflection mirror 314, a third reflection mirror 315, a first relay lens 316, and a second relay lens 317.

[0018] The first dichroic mirror 311 transmits the red light LR and reflects the green light LG and the blue light LB. The second dichroic mirror 312 reflects the green light LG out of the green light LG and the blue light LB reflected by the first dichroic mirror 311 and transmits the blue light LB. The first reflection mirror 313 reflects the red light LR. The second reflection mirror 314 and the third reflection mirror 315 reflect the blue light LB. The first relay lens 316 is disposed between the second dichroic mirror 312 and the second reflection mirror 314, and the second relay lens 317 is disposed between the second reflection mirror 314 and the third reflection mirror 315.

[0019] The projection optical device 4 is connected to a connection portion 10b for a projection optical unit provided in the case 10 of the image forming device 3. The projection optical device 4 is composed of a projection lens group, and light from each of the light modulation panels 32R, 32G, and 32B of the image forming unit 3A is incident thereon through the connection portion 10b for the projection optical unit of the case 10. The projection optical device 4 enlarges and projects the image light synthesized by the cross dichroic prism 34 toward the screen. As a result, an enlarged color image is displayed on the screen.

[0020] In recent years, when viewing content by attaching a device (connected device) such as an SMP (Smart Media Player: registered trademark) to a projector, for example, there are cases. Generally, when attaching an SMP to a projector, the SMP is connected to an external input terminal of the projector. Therefore, the SMP main body is connected to the projector via an HDMI (High-Definition Multimedia Interface: registered trademark) cable or a power supply cable, so the appearance of the projector during content viewing deteriorates.

[0021] Therefore, when the appearance deterioration is suppressed by arranging the HDMI cable, the power supply cable, and the SMP main body inside the projector, the heat dissipation of the SMP deteriorates, and there is a risk of malfunction such as a hang-up due to an increase in the temperature of the SMP inside the projector. In addition, it is also conceivable to separately provide a fan dedicated to the SMP. In this case, however, the number of parts increases, which may increase the cost, increase the size of the projector, and increase the noise and power consumption due to an increase in the number of fans.

[0022] The projector 1 of the present embodiment can suppress malfunction of the device by efficiently cooling the device even when the appearance deterioration is suppressed while miniaturizing the device configuration by detachably accommodating a device such as an SMP in the exterior housing 5. Note that in the projector 1 of the present embodiment, the device is not included in the components of the projector.

[0023] In the projector 1 of this embodiment, a plurality of heat sources are arranged inside the exterior housing 5. Specifically, the first heat source corresponds to the light source device 2, the second heat sources correspond to the light modulation panels 32R, 32G, and 32B of the image forming device 3, and the third heat source corresponds to the device DB.

[0024] The exterior housing 5 of this embodiment includes a front surface portion 51, a rear surface portion 52, a left side surface portion 53, a right side surface portion 54, a top surface portion 55, and a bottom surface portion 56. The exterior housing 5 is formed, for example, in a substantially rectangular parallelepiped shape. In FIG. 1, in order to show the internal structure of the exterior housing 5, the top surface portion 55 is illustrated as a transparent member.

[0025] The front surface portion 51 is located on the front side (+Y) in the front-rear direction Y and is a plate-like portion along the XZ plane. The rear surface portion 52 is located on the rear side (-Y) in the front-rear direction Y and is a plate-like portion along the XZ plane. The left side surface portion 53 is located on the left side (-X) in the left-right direction X and is a plate-like portion along the YZ plane. The right side surface portion 54 is located on the right side (+X) in the left-right direction X and is a plate-like portion along the YZ plane. The top surface portion 55 connects the upper side (+Z) ends of the front surface portion 51, the rear surface portion 52, the left side surface portion 53, and the right side surface portion 54 to each other and is a plate-like portion along the XY plane. The bottom surface portion 56 connects the lower side (-Z) ends of the front surface portion 51, the rear surface portion 52, the left side surface portion 53, and the right side surface portion 54 to each other and is a plate-like portion along the XY plane.

[0026] The front surface portion 51 has an opening 51a provided substantially at the center. The projection optical device 4 is inserted into the exterior housing 5 through the opening 51a and is connected to the image forming device 3. In the case of this embodiment, the front end portion of the projection optical device 4 protrudes outside the exterior housing 5 through the opening 51a, but the front end portion of the projection optical device 4 may be located inside the exterior housing 5 rather than the opening 51a.

[0027] The projector 1 of this embodiment is provided with a cooling device for cooling the above three heat sources. FIG. 2 is a schematic diagram showing the cooling path in the cooling device of the projector 1. As shown in FIG. 2, the cooling device 40 includes an intake fan (first fan) 41 and an exhaust fan (second fan) 42. That is, the projector 1 of the present embodiment further includes an intake fan 41 and an exhaust fan 42. The intake fan 41 and the exhaust fan 42 are housed in the exterior housing 5. As the intake fan 41 and the exhaust fan 42, for example, an axial fan, a centrifugal fan, a sirocco fan, etc. can be used, but the type of the fan is not limited thereto.

[0028] The exterior housing 5 of the present embodiment has a first housing portion 6, a second housing portion 7, and a third housing portion 8. In the first housing portion 6, the device DB is detachably housed. In the present embodiment, the device DB is the first object to be cooled by the cooling device 40. In the second housing portion 7, the light source device 2 and the image forming device 3 are housed. In the present embodiment, the light source device 2 and the image forming device 3 are the second objects to be cooled by the cooling device 40. In the third housing portion 8, the dust filter 9 is housed.

[0029] The intake fan 41 cools the device DB that is the first object to be cooled, and the light source device 2 and the image forming device 3 that are the second objects to be cooled, by sequentially supplying the airflow K taken in from the outside of the exterior housing 5 to the first housing portion 6 and the second housing portion 7. The intake fan 41 takes in the airflow K inside through the air intake port 64 provided in the exterior housing 5. The air intake port 64 is provided on the right side surface portion 54 of the exterior housing 5. The detailed configuration of the air intake port 64 will be described later.

[0030] In the case of the present embodiment, the intake fan 41 and the air intake port 64 are arranged side by side in the left - right direction X. When the intake fan 41 is driven, a flow of the airflow K from the air intake port 64 toward the intake fan 41 is generated.

[0031] In the present embodiment, the first housing portion 6 is located on the air intake port 64 side of the intake fan 41. That is, the first housing portion 6 is located on the inflow side of the airflow K with respect to the intake fan 41. The intake fan 41 supplies the low - temperature airflow K taken in from the air intake port 64 to the first housing portion 6 and cools the device DB housed in the first housing portion 6.

[0032] In the case of this embodiment, the intake port 64, the first housing portion 6, and the intake fan 41 are arranged linearly along the left - right direction X. According to this configuration, since the air flow K flows linearly from the intake port 64 toward the intake fan 41, the fluidity of the air flow K is enhanced, and thus the cooling performance can be further improved.

[0033] The second housing portion 7 is located on the side opposite to the intake port 64 with respect to the intake fan 41. That is, the second housing portion 7 is located on the outflow side of the air flow K with respect to the intake fan 41. The intake fan 41 supplies the air flow K to the second housing portion 7 and cools the light source device 2 and the image forming device 3 housed in the second housing portion 7.

[0034] Hereinafter, a part of the air flow K flowing out from the intake fan 41 is referred to as the air flow K1, and another part of the air flow K flowing out from the intake fan 41 is referred to as the air flow K2.

[0035] In this embodiment, the air flow K1 from the intake fan 41 is supplied to the image forming device 3. Specifically, the air flow K1 is supplied from an opening (not shown) provided in the case 10 of the image forming device 3 and cools the light modulation panels 32R, 32G, 32B (see FIG. 1) housed in the case 10. The air flow K1 that has cooled the light modulation panels 32R, 32G, 32B flows into the exhaust fan 42 via the exhaust duct 20.

[0036] The air flow K2 from the intake fan 41 cools the light source device 2. The air flow K2 that has cooled the light source device 2 flows into the exhaust fan 42 via the exhaust duct 20. In this embodiment, the air flow K1 that has cooled the image forming device 3, which is the second object to be cooled, and the air flow K2 that has cooled the light source device 2, which is the second object to be cooled, flow into the exhaust fan 42 via the exhaust duct 20. The exhaust fan 42 discharges the exhaust air K3 including the air flow K1 and the air flow K2 to the outside of the exterior housing 5. The exhaust fan 42 discharges the exhaust air K3 to the outside through the exhaust port 65 provided in the left - hand side surface 53.

[0037] FIG. 3 is a perspective view showing a main part of the exterior housing 5. FIG. 4 is a perspective view showing a cross - section by a plane parallel to the XZ plane of FIG. 3. As shown in FIGS. 3 and 4, the intake port 64 is composed of a plurality of slits S. In the case of this embodiment, the intake port 64 is configured by arranging a plurality of slit arrays SL in which three slits S are arranged in the vertical direction Z in the front-rear direction Y. Based on such a configuration, the intake port 64 of this embodiment is capable of efficiently taking in the air flow K from the outside to the inside of the exterior housing 5.

[0038] The projector 1 of this embodiment has a connector portion 16. The connector portion 16 is provided on the front side (+Y) of the intake port 64 on the right side surface portion 54 of the exterior housing 5. The projector 1 of this embodiment can electrically connect the circuit board and the device DB by connecting an HDMI cable (not shown) routed in the first housing portion 6 and a power supply cable to the device DB housed in the first housing portion 6. According to the projector 1 of this embodiment, since the HDMI cable and the power supply cable connected to the device DB are not exposed outside the exterior housing 5, it is possible to suppress a deterioration in the appearance when using the device DB.

[0039] The connector portion 16 can be electrically connected to a circuit board housed in the exterior housing 5. The connector portion 16 is an external input terminal that enables external input from an external device to the projector 1. The connector portion 16 includes a USB terminal 16a having a USB standard. In the case of this embodiment, the connector portion 16 is, for example, a USB terminal corresponding to the TYPE-A standard. Note that the connector portion 16 may be configured to be directly connected to the circuit board or may be connected to a board separate from the circuit board. Also, the position where the connector portion 16 is provided is not limited to the right side surface portion 54 of the exterior housing 5, and may be provided, for example, on any of the front surface portion 51, the rear surface portion 52, the left side surface portion 53, and the top surface portion 55, or may be provided dispersedly on at least two of the right side surface portion 54, the front surface portion 51, the rear surface portion 52, the left side surface portion 53, and the top surface portion 55.

[0040] As shown in FIG. 4, the exterior housing 5 of the present embodiment further includes a partitioning member 17. In the case of the present embodiment, the partitioning member 17 is provided integrally with the top surface portion 55 of the exterior housing 5. The partitioning member 17 is a member that partitions the first accommodating portion 6. The first accommodating portion 6 is configured by being partitioned by the partitioning member 17 and is provided in a state of being recessed inside the exterior housing 5 in the vertical direction Z. The upper side (+Z) of the first accommodating portion 6 is open to the top surface portion 55 of the exterior housing 5. The device DB is accommodated in the exterior housing 5 by being inserted into the first accommodating portion 6 from the upper side (+Z) in the vertical direction Z as shown by the two-dot chain line in FIG. 4.

[0041] The partitioning member 17 that partitions the first accommodating portion 6 is composed of a sheet metal member including a portion where a cross section by a plane parallel to the XZ plane has a U shape. The partitioning member 17 includes a first plate member 17a and a second plate member 17b, and a third plate member 17c that connects the lower ends of the first plate member 17a and the second plate member 17b. The first plate member 17a and the second plate member 17b are arranged side by side in the left-right direction X, which is the inflow direction of the air flow K with respect to the first accommodating portion 6.

[0042] A plurality of slits (first through holes) S1 extending in the vertical direction Z are provided in the first plate member 17a. The first plate member 17a is a through hole that penetrates the first plate member 17a. Each slit S1 is arranged side by side in the front-rear direction Y. Each slit S1 communicates with the intake port 64. Here, the communication between the slit S1 and the intake port 64 means that the air flow K flowing in from the intake port 64 can flow into the first accommodating portion 6 through the slit S1.

[0043] In the case of the present embodiment, when viewed in plan in the left-right direction X, which is the inflow direction of the air flow K, each slit S1 overlaps with any one of the plurality of slits S that constitute the intake port 64. According to this configuration, since the slit S1 and the intake port 64 overlap in the inflow direction of the air flow K, the air flow K sucked in from the intake port 64 efficiently passes through the slit S1 and flows into the first accommodating portion 6. Therefore, the first accommodating portion 6 can enhance the cooling effect of the device DB by allowing the air flow K to flow in efficiently through the slit S1.

[0044] In addition, a plurality of slits (second through-holes) S2 extending in the vertical direction Z are provided in the second plate member 17b. Each slit S2 is arranged side by side in the front-rear direction Y. In the present embodiment, each slit S2 in the second plate member 17b and each slit S1 in the first plate member 17a overlap each other in the left-right direction X which is the inflow direction of the air flow K. Each slit S2 allows the air flow K to flow out from the first accommodating portion 6.

[0045] When viewed in plan view in the inflow direction of the air flow K, if the entire slits S1 and S2 overlap with the device DB, all of the air flow K flowing into the first accommodating portion 6 through the first slit S1 may hit the device DB and generate a large amount of noise. In addition, the flow of the air flow K toward the second slit S2 side is blocked by the device DB, making it difficult for the air flow K to be discharged from the first accommodating portion 6, and there is a possibility that heat may accumulate in the first accommodating portion 6.

[0046] In the case of the present embodiment, the positions of the slits S1 and S2 in the vertical direction Z are formed so as to protrude outside the device DB. As a result, a part of the air flow K flowing into the first accommodating portion 6 generates a flow that is efficiently discharged from the first accommodating portion 6 through the second slit S2 without hitting the device DB. Therefore, in the case of the present embodiment, the generation of the above-described noise can be suppressed and heat can be efficiently discharged from the first accommodating portion 6.

[0047] The exterior housing 5 of the present embodiment further has a filter support member 18. The filter support member 18 is provided integrally with the top surface portion 55 of the exterior housing 5 and the partition member 17. The filter support member 18 is arranged side by side with respect to the second plate member 17b of the partition member 17 on the intake fan 41 side. The filter support member 18 is a member that constitutes a third accommodating portion 8 for accommodating the dust filter 9 together with the second plate member 17b. The dust filter 9 is a filter that removes dust contained in the air flow K. The third accommodating portion 8 is arranged between the first accommodating portion 6 and the intake fan 41. That is, the dust filter 9 is arranged on the intake fan 41 side of the first accommodating portion 6.

[0048] The third accommodation part 8 is provided in a recessed state inside the exterior housing 5 in the vertical direction Z. The upper side (+Z) of the third accommodation part 8 is open to the top surface part 55 of the exterior housing 5. The dust filter 9 is attached to the exterior housing 5 by being inserted into the third accommodation part 8 from the upper side (+Z) in the vertical direction Z. Note that FIG. 4 shows a state where the dust filter 9 is inserted into the third accommodation part 8. The dust filter 9 is detachable from the third accommodation part 8.

[0049] Here, when the device DB is detachable from the first accommodation part 6 as described above, there is a possibility that dust adhering to the device DB may enter the first accommodation part 6 together with the device DB.

[0050] In the case of the present embodiment, when viewed in a plan view in the left - right direction X which is the inflow direction of the air flow K with respect to the first accommodation part 6, the third accommodation part 8 is arranged so as to overlap the first accommodation part 6. That is, in the inflow direction of the air flow K, the dust filter 9 is arranged so as to overlap the device DB. In the case of the present embodiment, the planar area of the third accommodation part (dust filter 9) is set to be larger than the planar area of the first accommodation part 6 (device DB).

[0051] According to the projector 1 of the present embodiment, even when dust adhering to the device DB is discharged from the first accommodation part 6 by the air flow K, the dust included in the air flow K can be removed by the dust filter 9 arranged at the subsequent stage of the first accommodation part 6. Therefore, by removing the dust flowing in together with the air flow K from the first accommodation part 6 with the dust filter 9, it is possible to suppress problems such as heat generation and a decrease in transmittance due to dust adhering to other optical components etc. arranged inside the exterior housing 5.

[0052] In the case of the present embodiment, when viewed in a plan view in the left - right direction X which is the inflow direction of the air flow K with respect to the first accommodation part 6 from the air inlet 64, the planar area of the air inlet 64 is set to be larger than the planar area of the first accommodation part 6. Also, the planar area of the dust filter 9 is set to be equal to or larger than the planar area of the air inlet 64. In the case of the projector 1 of the present embodiment, a part of the airflow K sucked in from the air inlet 64 flows into the first accommodating portion 6, and the remainder of a part of the airflow K sucked in from the air inlet 64 directly flows into the dust filter 9 without passing through the first accommodating portion 6. That is, the airflow K sucked in from the air inlet 64 flows into the dust filter 9 whether it passes through the first accommodating portion 6 or not. Therefore, in the projector 1 of the present embodiment, even when a dust filter is not separately provided at the inlet (air intake surface) of the air inlet 64, the intrusion of dust into the interior can be suppressed.

[0053] As shown in FIG. 3, the device DB and the first accommodating portion 6 that accommodates the device DB have a shape that is longitudinally long in the front-rear direction Y. That is, the longitudinal direction of the first accommodating portion 6 intersects (is orthogonal to) the left-right direction X, which is the inflow direction of the airflow K.

[0054] Also, the dust filter 9 and the third accommodating portion 8 that accommodates the dust filter 9 have a shape that is longitudinally long in the front-rear direction Y. That is, the longitudinal direction of the third accommodating portion 8 intersects (is orthogonal to) the left-right direction X, which is the inflow direction of the airflow K. In the present embodiment, the longitudinal direction of the third accommodating portion 8 is along the longitudinal direction of the first accommodating portion 6.

[0055] If the longitudinal direction of the third accommodating portion 8 is different from the longitudinal direction of the first accommodating portion 6, the dimension in the short side direction of the third accommodating portion 8 is set according to the dimension in the longitudinal direction of the first accommodating portion 6, so that the dimension of the third accommodating portion 8 becomes larger than necessary, leading to an increase in the size of the device configuration. On the other hand, in the projector 1 of the present embodiment, by making the longitudinal direction of the third accommodating portion 8 coincide with the longitudinal direction of the first accommodating portion 6 as described above, an increase in the size of the device configuration can be suppressed.

[0056] As shown in FIGS. 3 and 4, the exterior housing 5 of the present embodiment has an openable and closable lid 15. The lid 15 is attached to a predetermined position on the top surface 55 of the exterior housing 5 so as to be openable and closable by, for example, a hinge structure. Note that the opening and closing structure of the lid 15 is not limited to the hinge structure, and a slide structure, a fitting structure, or the like may be used.

[0057] The lid 15 is provided at a position that covers the first storage portion 6 and the third storage portion 8 in the closed state. The lid 15 is configured to be flush with the surface of the top surface 55 in the closed state. In the present embodiment, when the lid 15 of the exterior housing 5 is opened, the upper part Da of the device DB accommodated in the first storage portion 6 and the upper part of the dust filter 9 accommodated in the third storage portion 8 are exposed. That is, by opening the lid 15 of the exterior housing 5 of the present embodiment, access to the device DB and the dust filter 9 becomes possible, so that the attachment and detachment operations of the device DB and the dust filter 9 with respect to the exterior housing 5 can be easily performed.

[0058] As described above, the projector 1 of the present embodiment includes an exterior housing 5 having a first storage portion 6 that detachably accommodates a device DB that is a first cooling target, and a second storage portion 7 that accommodates an image forming apparatus 3 and a light source apparatus 2 that are second cooling targets, and an intake fan 41 that is accommodated in the exterior housing 5 and cools the first cooling target and the second cooling target by sequentially supplying an air flow K sucked from the outside of the exterior housing 5 to the first storage portion 6 and the second storage portion 7. The first storage portion 6 is located on the inflow side of the air flow K with respect to the intake fan 41, and the second storage portion 7 is located on the outflow side of the air flow K with respect to the intake fan 41.

[0059] According to the projector 1 of the present embodiment, by disposing the device DB on the inflow side of the airflow K to the intake fan 41, the device DB can be efficiently cooled by the low-temperature airflow K. In the projector 1 of the present embodiment, by providing the first housing portion 6 in the space on the inflow side of the intake fan 41 that has not been conventionally used for cooling, the space inside the exterior housing 5 can be effectively utilized when cooling two objects to be cooled with one intake fan 41. Therefore, the projector 1 of the present embodiment can suppress an increase in the size of the device configuration and can efficiently cool the device DB that is detachably attached to the exterior housing 5.

[0060] In the projector 1 of the present embodiment, the exterior housing 5 is disposed between the first housing portion 6 and the intake fan 41 and further has a third housing portion 8 that houses the dust filter 9.

[0061] According to this configuration, even when the dust adhering to the device DB is discharged from the first housing portion 6 by the airflow K, the dust contained in the airflow K can be removed by the dust filter 9 disposed at the rear stage of the first housing portion 6.

[0062] In the projector 1 of the present embodiment, when viewed in a plan view in the inflow direction of the airflow K with respect to the first housing portion 6, the third housing portion 8 is disposed so as to overlap the first housing portion 6, and the longitudinal direction of the first housing portion 6 and the longitudinal direction of the third housing portion 8 intersect with respect to the inflow direction of the airflow K, and the longitudinal direction of the third housing portion 8 is along the longitudinal direction of the first housing portion 6.

[0063] According to this configuration, since the dust filter 9 and the device DB overlap in the inflow direction of the airflow K, the dust in the airflow K can be removed well. Also, compared with the case where the longitudinal direction of the third housing portion 8 is different from the longitudinal direction of the first housing portion 6, an increase in the size of the device configuration can be suppressed.

[0064] In the projector 1 of the present embodiment, the exterior housing 5 has an openable and closable lid body 15, and by opening the lid body 15, the device DB can be attached to and detached from the first housing portion 6.

[0065] According to this configuration, by closing the lid 15, the first housing portion 6 can be covered, so that the appearance can be improved. Further, by closing the lid 15, the intrusion of dust into the first housing portion 6 can be suppressed.

[0066] In the projector 1 of the present embodiment, the exterior housing 5 has an air intake port 64 for taking in the air flow K therein and a partitioning member 17 for partitioning the first housing portion 6. The partitioning member 17 is provided with a first slit S1 communicating with the air intake port 64 and a second slit S2 for allowing the air flow K to flow out from the first housing portion 6.

[0067] According to this configuration, the cooling efficiency of the device DB can be enhanced by efficiently taking in the air flow K into the first housing portion 6 through the air intake port 64 and the first slit S1. For example, when the device DB has a function of connecting to a network, since the inside and the outside of the first housing portion 6 communicate with each other through the air intake port 64 and the first slit S1, the network performance of the device DB can be effectively exerted.

[0068] In the projector 1 of the present embodiment, the air intake port 64, the first housing portion 6, and the intake fan 41 are arranged in a straight line.

[0069] According to this configuration, the cooling performance can be further improved by enhancing the fluidity of the air flow K.

[0070] The projector 1 of the present embodiment further includes a light source device 2, an image forming device 3 that generates image light using the light emitted from the light source device 2, and an exhaust fan 42 that is housed in the exterior housing 5 and discharges the exhaust K3 that cools the device DB, the light source device 2, and the image forming device 3. A part of the air flow K flowing out from the intake fan 41, i.e., the air flow K1, cools the image forming device 3 and flows into the exhaust fan 42, and another part of the air flow K flowing out from the intake fan 41, i.e., the air flow K2, cools the light source device 2 and flows into the exhaust fan 42. The exhaust fan 42 discharges the exhaust K3 including the air flow K1 and the air flow K2 to the outside of the exterior housing 5.

[0071] According to this configuration, by branching the airflow K taken into the exterior housing 5, the image forming apparatus 3 and the light source device 2 can be efficiently cooled. Further, since the airflow K1 and the airflow K2 that have cooled the image forming apparatus 3 and the light source device 2 are discharged from the exterior housing 5 by a single exhaust fan 42, an increase in the size of the apparatus configuration can be suppressed compared to the case where exhaust fans corresponding to the respective airflows K1 and K2 are provided individually.

[0072] Note that the technical scope of the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. Further, one aspect of the present invention can be configured by appropriately combining the characteristic portions of the above-described embodiments.

[0073] (First Modified Example) Subsequently, a first modified example of the projector will be described. FIG. 5A is an enlarged view showing a main part configuration of a projector according to the first modified example. Note that the same reference numerals are given to the configurations common to the above-described embodiments, and detailed descriptions thereof are omitted.

[0074] As shown in FIG. 5A, the projector 100 of this modified example further includes a duct 61 through which the airflow K flows to the intake fan 41 via the intake port 64. The duct 61 extends along the left-right direction X. In the projector 100 of this modified example, the first housing portion 6 is provided in the duct 61. Specifically, the first housing portion 6 is provided in the duct 61 in a state where the long side direction of the first housing portion 6 is aligned with the left-right direction X, which is the extending direction of the duct 61. According to the projector 100 of this modified example, since the airflow K flows along the long side direction of the device DB, the cooling efficiency of the device DB can be enhanced.

[0075] (Second Modified Example) Subsequently, a second modified example of the projector will be described. FIG. 5B is an enlarged view showing the main part configuration of the projector according to the second modified example. Note that the same reference numerals are given to the configurations common to the above-described embodiment, and the detailed description thereof is omitted.

[0076] As shown in FIG. 5B, the projector 101 of this modified example further includes a duct 62 through which the air flow K flows to the intake fan 41 via the intake port 64. The duct 62 extends along the left-right direction X. In this modified example, the first housing portion 6 is provided in the duct 62. Specifically, the first housing portion 6 is provided in the duct 62 in a state where the short side direction of the first housing portion 6 is aligned with the left-right direction X, which is the extending direction of the duct 62. That is, the orientation of the first housing portion 6 in the projector 101 of this modified example is different by 90 degrees from the orientation of the first housing portion 6 in the projector 100 of the first modified example. According to the projector 101 of this modified example, since the air flow K flows along the short side of the device DB, the outer housing 5 can be downsized in the left-right direction X by shortening the duct 50 as compared with the configuration of the first modified example.

[0077] In addition, in the above-described embodiment, the case where the device DB is not included in the components of the projector 1 is taken as an example, but the device DB may be included in the components of the projector. That is, the projector in this aspect includes an outer housing 5 having a first housing portion 6 and a second housing portion 7, a device DB which is a first cooling target detachably accommodated in the first housing portion 6, a light source device 2 and an image forming device 3 which are second cooling targets accommodated in the second housing portion 7, and an intake fan 41 which is accommodated in the outer housing 5 and cools the first cooling target and the second cooling target in order by the air flow K taken in from the outside of the outer housing 5. The device DB is located on the inflow side of the air flow K with respect to the intake fan 41, and the light source device 2 and the image forming device 3 are located on the outflow side of the air flow K with respect to the intake fan 41.

[0078] In addition, in the above-described embodiment, the case where the dust filter 9 is disposed between the first housing portion 6 and the intake fan 41 is taken as an example, but the dust filter 9 may be disposed between the intake port 64 and the first housing portion 6.

[0079] In the above-described embodiment, the case where the air flow K2 is supplied to the light source device 2 as the second cooling target and the case where the air flow K1 is supplied to the image forming device 3 as the second cooling target are taken as examples. However, the portion of the projection optical device 4 housed in the exterior housing 5 or the power supply unit may be cooled by supplying the air flow K1 as the second cooling target, or the portion of the projection optical device 4 housed in the exterior housing 5 or the power supply unit may be cooled by supplying the air flow K2 as the second cooling target.

[0080] In addition, the specific descriptions of the shapes, numbers, arrangements, materials, etc. of the components of the light source device and the projector are not limited to the above-described embodiment and can be appropriately changed. Further, in the above-described embodiment, an example in which the light source device according to the present invention is mounted on a projector using a liquid crystal panel is shown, but the present invention is not limited thereto. The light source device according to the present invention may be applied to a projector using a digital micromirror device as a light modulation device. Further, the projector may not have a plurality of light modulation devices and may have only one light modulation device.

[0081] A projector according to one aspect of the present invention may have the following configuration. A projector according to one aspect of the present invention includes an exterior housing having a first housing portion that detachably houses a device to be connected as a first cooling target and a second housing portion that houses a second cooling target, and a first fan that is housed in the exterior housing and cools the first cooling target and the second cooling target by sequentially supplying an air flow taken in from the outside of the exterior housing to the first housing portion and the second housing portion. The first housing portion is located on the air inflow side with respect to the first fan, and the second housing portion is located on the air outflow side with respect to the first fan.

[0082] A projector according to one aspect of the present invention may be configured such that the exterior housing further has a third housing portion that is disposed between the first housing portion and the first fan and houses a dust filter.

[0083] In a projector according to one aspect of the present invention, when viewed in a plan view in the inflow direction of the airflow with respect to the first housing portion, the third housing portion is arranged so as to overlap the first housing portion, and with respect to the inflow direction of the airflow, the longitudinal direction of the first housing portion and the longitudinal direction of the third housing portion intersect each other, and the longitudinal direction of the third housing portion may be configured to be along the longitudinal direction of the first housing portion.

[0084] In a projector according to one aspect of the present invention, the exterior housing may have an openable lid, and by opening the lid, the device to be connected to the first housing portion may be configured to be detachable.

[0085] In a projector according to one aspect of the present invention, the exterior housing may have an air intake port for taking in air into the interior, and a partitioning member for partitioning the first housing portion, and the partitioning member may be provided with a first through-hole communicating with the air intake port and a second through-hole for allowing the airflow to flow out from the first housing portion.

[0086] In a projector according to one aspect of the present invention, the exterior housing may have an air intake port for taking in air into the interior of the exterior housing, and further include a duct for allowing the airflow to flow to the first fan through the air intake port, and the first housing portion may be provided in the duct.

[0087] In a projector according to one aspect of the present invention, the air intake port, the first housing portion, and the first fan may be arranged in a straight line.

[0088] In a projector according to one aspect of the present invention, the projector may further include a light source device, an image forming device that generates image light using the light emitted from the light source device, and a second fan that is housed in the exterior housing and discharges the exhaust air that has cooled the first cooling target and the second cooling target to the outside of the exterior housing. The light source device and the image forming device are the second cooling targets. A part of the airflow flowing out from the first fan cools the image forming device and flows into the second fan, and another part of the airflow flowing out from the first fan cools the light source device and flows into the second fan. The second fan may be configured to discharge the exhaust air including a part of the airflow and another part of the airflow to the outside of the exterior housing.

[0089] The projector according to one aspect of the present invention may be configured such that the device to be connected is a device.

[0090] The projector according to one aspect of the present invention may have the following configuration. The projector according to one aspect of the present invention includes an exterior housing having a first housing portion and a second housing portion, a first cooling target which is a device to be connected detachably housed in the first housing portion, a second cooling target housed in the second housing portion, and an intake fan housed in the exterior housing and configured to cool the first cooling target and the second cooling target in this order by an air flow sucked from outside the exterior housing. The first cooling target is located on the air flow inflow side with respect to the intake fan, and the second cooling target is located on the air flow outflow side with respect to the intake fan.

Description of Reference Numerals

[0091] 1, 100, 101... Projector, 2... Light source device, 3... Image forming device, 5... Exterior housing, 6... First housing portion, 7... Second housing portion, 8... Third housing portion, 9... Dust filter, 15... Cover, 17... Partition member, 41... Intake fan (first fan), 42... Exhaust fan (second fan), 61, 62... Duct, 64... Intake port, DB... Device (device to be connected), K, K1, K2... Air flow, K3... Exhaust, S1... Slit (first through hole), S2... Slit (second through hole).

Claims

1. A projector comprising an exterior housing in which external input terminals are arranged and a first fan. Wherein, the exterior housing has a first accommodating portion for detachably accommodating a connected device that is a first cooling target and is connected to the projector via the external input terminals, and a second accommodating portion for accommodating a second cooling target. The first accommodating portion is located on the inflow side of the airflow with respect to the first fan. The second accommodating portion is located on the outflow side of the airflow with respect to the first fan. The first fan is accommodated in the exterior housing and cools the first cooling target and the second cooling target by sequentially supplying the airflow sucked from the outside of the exterior housing to the first accommodating portion and the second accommodating portion. The projector.

2. The exterior housing further has a third accommodating portion disposed between the first accommodating portion and the first fan and accommodating a dust filter. The projector according to claim 1.

3. When viewed in plan in the inflow direction of the airflow with respect to the first accommodating portion, the third accommodating portion is arranged so as to overlap the first accommodating portion. The longitudinal direction of the first accommodating portion and the longitudinal direction of the third accommodating portion intersect with respect to the inflow direction of the airflow. The longitudinal direction of the third accommodating portion is along the longitudinal direction of the first accommodating portion. The projector according to claim 2.

4. The exterior housing has an openable lid, and opening the lid makes the connected device detachable with respect to the first accommodating portion. The projector according to any one of claims 1 to 3.

5. The exterior housing has an air intake for taking in the airflow and a partitioning member for partitioning the first accommodating portion. The partitioning member is provided with a first through hole communicating with the air intake and a second through hole for discharging the airflow from the first accommodating portion. The projector according to any one of claims 1 to 4.

6. The exterior housing has an air intake for taking in the airflow into the interior of the exterior housing, and further includes a duct for allowing the airflow to flow to the first fan through the air intake. The first accommodating portion is provided in the duct. The projector according to any one of claims 1 to 4.

7. The air intake, the first accommodating portion, and the first fan are arranged in a straight line. The projector according to claim 5 or claim 6.

8. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ A light source device, an image forming device that generates image light using the light emitted from the light source device, a second fan that is housed in the exterior housing and discharges the exhaust air that has cooled the first cooling target and the second cooling target to the outside of the exterior housing, and further includes: the light source device and the image forming device are the second cooling targets, a part of the air flow flowing out from the first fan cools the image forming device and flows into the second fan, another part of the air flow flowing out from the first fan cools the light source device and flows into the second fan, the second fan discharges the exhaust air including the part of the air flow and the other part of the air flow to the outside of the exterior housing, A projector according to any one of claims 1 to 7.

9. The connected device is a wireless communication device that wirelessly acquires image information, A projector according to any one of claims 1 to 8.

10. An external input terminal, an exterior housing having a first housing portion and a second housing portion, a first cooling target that is a connected device detachably housed in the first housing portion so as to be connected to the projector via the external input terminal, a second cooling target housed in the second housing portion, an intake fan that is housed in the exterior housing and sequentially cools the first cooling target and the second cooling target by an air flow sucked from the outside of the exterior housing, and includes: the first cooling target is located on the air flow inflow side with respect to the intake fan, the second cooling target is located on the air flow outflow side with respect to the intake fan, A projector. ​ ​

Images