WO2020045084A1 - Projection device and control method therefor - Google Patents

Projection device and control method therefor Download PDF

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Publication number
WO2020045084A1
WO2020045084A1 PCT/JP2019/031880 JP2019031880W WO2020045084A1 WO 2020045084 A1 WO2020045084 A1 WO 2020045084A1 JP 2019031880 W JP2019031880 W JP 2019031880W WO 2020045084 A1 WO2020045084 A1 WO 2020045084A1
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WO
WIPO (PCT)
Prior art keywords
fan
filter
housing
air
rotated
Prior art date
Application number
PCT/JP2019/031880
Other languages
French (fr)
Japanese (ja)
Inventor
藤村　有一
亮 今井
泰斗 黒田
慶洋 里舘
Original Assignee
富士フイルム株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 富士フイルム株式会社 filed Critical 富士フイルム株式会社
Priority to JP2020539325A priority Critical patent/JP6865331B2/en
Publication of WO2020045084A1 publication Critical patent/WO2020045084A1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/16—Cooling; Preventing overheating
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/74—Projection arrangements for image reproduction, e.g. using eidophor

Definitions

  • the present invention relates to a projection device and a control method thereof.
  • a projector as a projection device includes a light source, a light modulation element that spatially modulates light from the light source, and a member having a large temperature rise (hereinafter, referred to as a member to be cooled) such as a power supply circuit. It is common to mount a fan for cooling.
  • Patent Literature 1 discloses a housing that constitutes an exterior, an opening provided in the housing, and outside air that is sucked into the housing by a forward rotation operation through the opening, and the inside of the housing is rotated by a reverse rotation operation.
  • a projector that includes a fan that discharges air from outside of the electronic device, and a filter that is disposed between the opening and the fan and that prevents dust from entering the inside of the housing.
  • Patent Literature 2 discloses a projector including an exterior housing having an air intake port for taking in external air, and a dustproof filter that covers the air intake port and suppresses dust from entering the interior of the exterior housing. ing.
  • the dustproof filter moves to form a gap between the housing and the dustproof filter to secure a sufficient amount of air intake.
  • Patent Document 3 describes a projector having a lid for closing an air intake port in order to prevent dust from entering the inside of a housing when a filter is replaced.
  • Patent Literature 4 discloses an opening formed in a housing, an air guide plate provided in the opening, the opening state of which can be changed, and a cooling air provided in the housing and provided in the housing.
  • An image projection device is described which includes a fan capable of changing a flow rate of air passing through the fan and a control unit for controlling an opening state of a wind guide plate so as to match the flow rate of the fan during operation of the apparatus.
  • the dust collecting filter provided opposite to the intake fan prevents dust from outside the housing of the projector from entering the inside of the housing when the intake fan is rotated in the forward direction and the air is sucked. .
  • Patent Document 1 when the intake fan is rotated in the reverse direction, dust adhering to the filter can be removed by the wind pressure due to the reverse rotation.
  • Patent Document 1 when the intake fan is rotated in the reverse direction, if dust is present inside the housing, the dust may adhere to the filter. When the intake fan rotates forward, the dust returns to the inside of the housing. Therefore, there is a problem that it is difficult to remove dust that has entered the inside of the housing.
  • Patent Literature 1 does not describe these problems and their solutions.
  • Patent Documents 2-4 do not assume that the intake fan is rotated in the reverse direction, and do not recognize the problem described above.
  • the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a projection device that can prevent dust from adhering to members inside a housing and a control method thereof.
  • the projection device of the present invention includes a housing having an opening, and takes air into the housing from the opening in a state where the housing is normally rotated, and draws air in the housing in a state where the housing is rotated in the reverse direction.
  • the plurality of filter units are arranged such that when the fan is rotating forward, the adjacent filter units come into contact with each other to open the filter unit. When the fan is rotated in the reverse direction, the adjacent filter units are separated from each other, and a space through which air in the housing is discharged is provided in a gap between the adjacent filter units. To form.
  • the method of controlling a projection device includes a housing having an opening, and taking air into the housing from the opening in a state where the housing is normally rotated, and a case in the housing in a state where the housing is rotated in a reverse direction.
  • a method for controlling a projection device comprising: a fan that discharges air from the opening, and a filter unit that captures dust contained in air taken into the housing by the fan, wherein the filter unit includes: A rotating shaft extending in a direction perpendicular to a direction in which air is discharged by the reverse rotation of the fan, and a filter configured to capture dust that is rotatable about the rotating shaft.
  • It is constituted by a plurality of filter units arranged in a direction perpendicular to the rotation axis, and when the fan is rotating forward, the adjacent filter units are brought into contact with each other. In the state in which the opening is closed by the plurality of filter units and the fan is rotated in the reverse direction, the adjacent filter units are separated from each other, and a gap between the adjacent filter units is provided in the housing. To form a flow path through which the air is discharged.
  • a projection device capable of preventing dust from adhering to a member inside a housing and a control method thereof.
  • FIG. 1 is a schematic diagram illustrating a schematic configuration of a projector 100 that is an embodiment of a projection device of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward.
  • FIG. 2 is a schematic cross-sectional view of a range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction.
  • FIG. 4 is a schematic cross-sectional view showing a modification of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward.
  • FIG. 3 is a schematic cross-sectional view showing a modification of a range A in FIG.
  • FIG. 9 is a schematic diagram showing a schematic configuration of a projector 100A which is a first modification of the projector 100 shown in FIG.
  • FIG. 4 is a schematic cross-sectional view showing a modification of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward.
  • FIG. 3 is a schematic cross-sectional view showing a modification of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction.
  • FIG. 9 is a schematic diagram showing a schematic configuration of a projector 100B which is a second modification of the projector 100 shown in FIG. FIG.
  • FIG. 10 is a schematic cross-sectional view of a range B in FIG. 9 in a state where the exhaust fan 8A illustrated in FIG. 9 is rotating in the reverse direction.
  • FIG. 10 is a schematic sectional view of a range B in FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating forward.
  • FIG. 1 is a schematic diagram showing a schematic configuration of a projector 100 which is an embodiment of the projection device of the present invention.
  • the projector 100 includes a housing 10 made of metal, resin, or the like, and a light source unit 2, a light modulation element 3, a projection optical system 4, a system control unit 5, an intake fan 7, and an exhaust provided inside the housing 10.
  • the air conditioner includes a fan 8 and a filter unit 70 provided at an intake port 10 ⁇ / b> A formed in the housing 10.
  • the light source unit 2 includes a light source 21 that emits white light, a color wheel 22, and an illumination optical system 23.
  • the light source 21 is configured to include a light emitting element such as a laser or an LED (Light Emitting Diode).
  • the color wheel 22 is disposed between the light source 21 and the illumination optical system 23.
  • the color wheel 22 is a disk-shaped member, and provided along its circumferential direction are an R filter that transmits red light, a G filter that transmits green light, and a B filter that transmits blue light.
  • the color wheel 22 is rotated around an axis, and splits white light emitted from the light source 21 into red light, green light, and blue light in a time-sharing manner and guides the white light to the illumination optical system 23.
  • Light emitted from the illumination optical system 23 enters the light modulation element 3.
  • the light modulation element 3 spatially modulates the light emitted from the illumination optical system 23 based on the image data, and emits the spatially modulated light to the projection optical system 4.
  • the projector 100 shown in FIG. 1 is an example in which a DMD (Digital Micromirror Device) is used as the light modulation element 3, but the light modulation element 3 is, for example, LCOS (Liquid Crystal on Silicon) or MEMS (Micro Electro Mechanical Systems). It is also possible to use an element, a liquid crystal display element, or the like.
  • a DMD Digital Micromirror Device
  • the light modulation element 3 is, for example, LCOS (Liquid Crystal on Silicon) or MEMS (Micro Electro Mechanical Systems). It is also possible to use an element, a liquid crystal display element, or the like.
  • the projection optical system 4 receives the light from the light modulation element 3 and includes at least one lens. Light that has passed through the projection optical system 4 is projected on a screen (not shown) through an opening provided in the housing 10.
  • the intake fan 7 is provided at a position facing the intake port 10A formed by the opening formed in the housing 10.
  • the rotation direction of the intake fan 7 can be switched between forward and reverse. In a state where the intake fan 7 is rotated in one direction (forward rotation), air is taken into the casing 10 from the intake port 10A, and in a state where the air is rotated in the opposite direction to this one direction (reverse rotation). Discharges the air in the housing 10 from the inlet 10A.
  • the air taken into the casing 10 by the forward rotation of the intake fan 7 is blown against a member to be cooled such as the light source 21, the light modulation element 3, or a power supply circuit (not shown) to cool them. .
  • the intake fan 7 is controlled by the system control unit 5.
  • the intake port 10A constitutes an opening, and the intake fan 7 constitutes a fan.
  • the filter unit 70 provided at the intake port 10A is provided to capture dust contained in air taken into the housing 10 by the intake fan 7.
  • the exhaust fan 8 is provided at a position facing the exhaust port 10B formed by the opening formed in the housing 10, and discharges the air in the housing 10 from the exhaust port 10B.
  • the exhaust fan 8 is controlled by the system control unit 5.
  • a filter (not shown) is fitted to the exhaust port 10B, and the filter prevents dust from entering the housing 10 from the exhaust port 10B.
  • the system control unit 5 controls the light source unit 2, controls the light modulation element 3, controls the intake fan 7, controls the exhaust fan 8, and the like, and includes a processor, a ROM (Read Only Memory), and a RAM. (Random @ Access @ Memory).
  • a programmable logic device CPU (Central Processing Unit), which is a general-purpose processor for executing various processes by executing a program, or a processor capable of changing a circuit configuration after manufacturing, such as an FPGA (Field Programmable Gate Array).
  • a dedicated electric circuit which is a processor having a circuit configuration specifically designed to execute a specific process such as Programmable Logic Device (PLD) or ASIC (Application Specific Integrated Circuit), is included.
  • PLD Programmable Logic Device
  • ASIC Application Specific Integrated Circuit
  • the structure of these processors is more specifically an electric circuit combining circuit elements such as semiconductor elements.
  • the processor of the system control unit 5 may be configured by one of the various processors described above, or a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs or a combination of a CPU and an FPGA). Combination).
  • FIG. 2 is a schematic cross-sectional view of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward.
  • FIG. 3 is a schematic sectional view of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction.
  • the projector 100 is assumed to be used in a posture in which the direction Y1 shown in FIGS. 2 and 3 is a vertical direction.
  • the direction Y2 shown in FIGS. 2 and 3 is a direction opposite to the vertical direction.
  • the direction X2 shown in FIGS. 2 and 3 is the direction of suction of air into the housing 10 when the intake fan 7 is rotating forward.
  • a direction X1 shown in FIGS. 2 and 3 is a direction in which the air is discharged from the housing 10 when the intake fan 7 is rotating in the reverse direction, and is opposite to the direction X2.
  • the direction Y1 is orthogonal to the direction X1.
  • the filter unit 70 includes a plurality of (five in the example of FIGS. 2 and 3) filter units 71.
  • the filter unit 71 includes a rotation shaft 72 extending in a direction perpendicular to the direction X1 and the direction Y1 (a direction from the front to the back of the paper of FIGS. 2 and 3), and a rotation shaft 72 rotatably around the rotation shaft 72.
  • the filter 73 is supported by, for example, a mesh-shaped and plate-shaped filter 73 for capturing dust.
  • the five filter units 71 are arranged in the direction in which the rotating shaft 72 extends and in the direction perpendicular to the direction X1, that is, in the direction Y1 or the direction Y2.
  • the rotating shaft 72 is supported by a frame (not shown) fitted to the intake port 10A.
  • the position in the direction X1 of the end (tip) of the filter unit 70 of the filter unit 70 opposite to the rotation shaft 72 side of the filter 73 is smaller than the position of the filter unit 70 in the direction X1 of the rotation shaft 72 in each filter unit 71. Is also on the direction X1 side (the right side in FIGS. 2 and 3).
  • the filter 73 in each filter unit 71 of the filter unit 70 is configured to contact the rotation shaft 72 of the filter unit 71 adjacent in the direction Y1 due to its own weight when the intake fan 7 is stopped. . Further, the filter 73 in each filter unit 71 of the filter unit 70 controls the wind pressure of the air W1 (see FIG. 2) sucked into the housing 10 by the intake fan 7 when the intake fan 7 is rotating forward. Due to its own weight, the filter unit 71 is configured to be in contact with the rotation shaft 72 of the filter unit 71 adjacent to the direction Y1. As described above, in the state where the intake fan 7 is stopped and the state where the intake fan 7 is rotating forward, the filter unit 70 is configured to block the intake port 10A by the five filter units 71. .
  • each filter unit 71 of the filter unit 70 is controlled by the wind pressure of the air W2 (see FIG. 3) discharged from the housing 10 by the intake fan 7 when the intake fan 7 is rotating in the reverse direction.
  • the filter unit 71 is separated from the rotation shaft 72 of the filter unit 71 adjacent in the direction Y1.
  • the amount of rotation of the filter 73 is limited so that the angle ⁇ (see FIG. 3) between the surface facing the inside of the housing 10 and the direction Y1 is 90 degrees at the maximum. In the example of FIG. 3, the maximum value of the angle ⁇ is less than 90 degrees (for example, 45 degrees).
  • the five filter units 71 are separated from each other, and the air W2 is discharged into the gap between the adjacent filter units 71. It is configured to form a route to be performed.
  • the projector 100 configured as described above is provided with a cleaning mode for removing dust captured by each filter 73 of the filter unit 70 in addition to a projection mode for projecting an image on a screen.
  • This cleaning mode can be automatically started, for example, when an operation of turning off the power of the projector 100 is performed, or can be manually started.
  • the system control unit 5 rotates the intake fan 7 forward in the projection mode.
  • the intake port 10A is closed by the five filter units 71 as shown in FIG. Therefore, dust contained in the air W1 sucked into the intake port 10A is captured by each filter 73 of the filter unit 70, and is prevented from entering the inside of the housing 10.
  • the system control unit 5 rotates the intake fan 7 in the reverse direction.
  • the filter 73 rotates in the direction X1 from the state shown in FIG.
  • the intake port 10A is partially opened by the gap between the adjacent filter units 71. Therefore, the air W2 inside the casing 10 passes through each filter 73 of the filter unit 70 and also passes through a flow path formed in a gap between the adjacent filter units 71.
  • dust trapped on the surface of the filter 73 opposite to the surface facing the housing 10 is removed by being blown off in the direction X1 by the air W2 passing through the filter 73 and the flow path.
  • the dust may adhere to the surface of the filter 73 facing the housing 10. However, when the air W2 flows along the flow path, dust adhering to this surface is blown off in the direction X1 along the flow path and removed.
  • the system controller 5 stops the intake fan 7 and ends the cleaning mode. Thereby, each filter 73 of the filter unit 70 rotates in the direction X2 from the state of FIG. 3 and returns to the state shown in FIG.
  • the projector 100 even when dust is present inside the casing 10 in the cleaning mode, the dust is removed from the flow passage formed in the gap between the filter units 71 by the casing 100. It can be discharged outside the body 10. For this reason, in the projection mode, the dust does not return to the inside of the housing 10, and the adhesion of the dust to members inside the housing 10 can be prevented.
  • each filter 73 of the filter unit 70 rotates toward the discharge direction of the air W2 by the intake fan 7, and Is formed. For this reason, the outlet of the flow path formed in the gap between the filter units 71 can be formed outside the intake port 10A, and the dust inside the housing 10 can be effectively removed. Further, according to this configuration, the filter 73 can be rotated only by the wind pressure generated by the rotation of the intake fan 7, so that the size of the projector 100 and the manufacturing cost can be reduced.
  • each filter 73 of the filter unit 70 is inclined with respect to the direction X1, which is the direction of discharging the air W2. It will be in the state of having done. As described above, it is possible to set the maximum value of the angle ⁇ to 90 degrees. However, by setting the maximum value to less than 90 degrees, the air on the surface of the filter 73 facing the inside of the housing 10 becomes air-tight. W2 can be blown strongly. For this reason, dust inside the housing 10 can be effectively removed.
  • the maximum value of the angle ⁇ is less than 90 degrees, the direction in which the air W2 flows along the flow path formed in the gap between the filter units 71 can be made closer to the vertical direction. For this reason, the ability of removing the dust adhering to the surface of the filter 73 facing the inside of the housing 10 can be enhanced by the synergistic effect of the wind pressure of the air W2 flowing through the flow path and the gravity acting on the dust.
  • the rotating shaft 72 may be electrically driven by a driving unit such as a motor (not shown). In this case, this motor is controlled by the system control unit 5. Then, in the state of FIG. 2 in which the intake fan 7 is normally rotated, the system control unit 5 controls the motor to rotate the filter 73 to a position where the adjacent filter units 71 contact each other. In the state shown in FIG. 3 in which the intake fan 7 is rotated in the reverse direction, the system control unit 5 controls the motor to rotate the filter 73 to a position where the adjacent filter units 71 are separated from each other.
  • a driving unit such as a motor (not shown). In this case, this motor is controlled by the system control unit 5. Then, in the state of FIG. 2 in which the intake fan 7 is normally rotated, the system control unit 5 controls the motor to rotate the filter 73 to a position where the adjacent filter units 71 contact each other. In the state shown in FIG. 3 in which the intake fan 7 is rotated in the reverse direction, the system control unit 5 controls the motor to rotate the filter
  • the state in which the intake port 10A is closed and the state in which the intake port 10A is partially opened can be electrically switched. For this reason, for example, after the intake fan 7 is stopped or immediately before the intake fan 7 is stopped, the intake port 10A is closed by the motor control, thereby firmly preventing dust from entering from the intake port 10A. be able to.
  • the filter 73 of the filter unit 71 is rotated in the direction X2 while the intake fan 7 is rotating in the reverse direction, so that the air flows through the gap between the adjacent filter units 71.
  • a configuration for forming a road can be employed. This configuration will be described with reference to FIGS.
  • FIG. 4 is a schematic cross-sectional view showing a modification of the range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward.
  • FIG. 5 is a schematic cross-sectional view showing a modification of the range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction.
  • FIG. 4 is the same as FIG. 2 except that the filter unit 70 is changed to a filter unit 70A.
  • FIG. 5 is the same as FIG. 3 except that the filter unit 70 is changed to a filter unit 70A.
  • the filter unit 70A is configured such that the position of the tip of the filter 73 of the filter unit 71 is on the direction X2 side of the rotation shaft 72, that the rotation shaft 72 of the filter unit 71 is driven by the motor, 5, the filter 73 is rotated in the direction X2 to form a flow path in the gap between the filter units 71 in the state of FIG. However, this is different from the filter unit 70.
  • the filter 73 rotates toward the inside of the housing 10 to form a flow path in the gap between the filter units 71. Is done.
  • dust adhering to the filter 73 and dust inside the housing 10 can be discharged to the outside of the housing 10.
  • FIG. 6 is a schematic diagram showing a schematic configuration of a projector 100A which is a first modification of the projector 100 shown in FIG.
  • Projector 100A has the same configuration as projector 100 except that a vibration unit 74 is added.
  • the vibrating section 74 is a device for vibrating the filter section 70, and includes, for example, an ultrasonic vibrator and a drive element for driving the vibrator.
  • the vibration unit 74 is controlled by the system control unit 5.
  • the system control unit 5 of the projector 100A operates the vibration unit 74 to vibrate the filter unit 70.
  • the system control unit 5 of the projector 100A stops the vibration unit 74 when the intake fan 7 is rotating forward or stopped.
  • the filter 70 vibrates when the intake fan 7 is rotated in the reverse direction, the effect of removing dust inside the housing 10 and dust adhering to the filter 73 can be enhanced.
  • FIG. 7 is a schematic cross-sectional view showing a modification of the range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward.
  • FIG. 8 is a schematic cross-sectional view showing a modification of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction.
  • FIG. 7 is the same as FIG. 2 except that the filter unit 70 is changed to a filter unit 70B.
  • FIG. 8 is the same as FIG. 3 except that the filter unit 70 is changed to a filter unit 70B.
  • the filter unit 70B shown in FIGS. 7 and 8 differs from the filter unit 70 in the position of the rotation shaft 72 in the filter unit 71.
  • the rotation shaft 72 of the filter unit 71 in the filter section 70B is located at the center of the filter 73. Even in such a filter unit 70B, dust present in the housing 10 can be removed in the cleaning mode.
  • FIG. 9 is a schematic diagram showing a schematic configuration of a projector 100B which is a second modification of the projector 100 shown in FIG.
  • the projector 100B is different from the projector 100B in that the exhaust fan 8 is changed to the exhaust fan 8A, and that the filter unit 70 having the same structure as that provided in the intake port 10A is also provided in the exhaust port 10B. It has the same configuration as projector 100.
  • the exhaust fan 8A is provided at a position facing the exhaust port 10B.
  • the exhaust fan 8A can switch its rotation direction between forward and reverse. When the exhaust fan 8A is rotating in one direction (forward rotation), it takes in air from the exhaust port 10B into the housing 10 and rotates in the opposite direction to this one direction (reverse rotation). Discharges the air in the housing 10 from the exhaust port 10B.
  • the inlet 10A forms a first opening
  • the outlet 10B forms a second opening
  • the filter section 70 provided at the intake port 10A constitutes a first filter section
  • the filter section 70 provided at the exhaust port 10B constitutes a second filter section.
  • the system control unit 5 of the projector 100B rotates the exhaust fan 8A in the reverse mode in the projection mode, and rotates the exhaust fan 8A in the normal mode in the cleaning mode.
  • FIG. 10 is a schematic cross-sectional view of a range B in FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating in the reverse direction.
  • FIG. 11 is a schematic cross-sectional view of a range B of FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating forward.
  • the intake fan 7 rotates forward, takes in the air W1 into the housing 10 through the filter unit 70 provided in the intake port 10A, and cools the member to be cooled by the air W1.
  • the exhaust fan 8A rotates in the reverse direction, and a flow path is formed between the filter units 71 in the filter unit 70 provided at the exhaust port 10B by the wind pressure from the exhaust fan 8A. Therefore, as shown in FIG. 10, the air W1 introduced into the housing 10 by the normal rotation of the intake fan 7 is supplied to the air passage W formed in the exhaust port 10B and the filter 73 provided in the exhaust port 10B. It passes through both and is discharged to the outside of the housing 10.
  • the exhaust fan 8A rotates forward, and the air W2 is taken into the housing 10 via the filter 70 provided in the exhaust port 10B.
  • the intake fan 7 rotates in the reverse direction, and a flow path is formed between the filter units 71 in the filter section 70 provided at the intake port 10A by the wind pressure from the intake fan 7.
  • the air W2 introduced into the housing 10 by the forward rotation of the exhaust fan 8A passes through the flow path formed in the intake port 10A and the filter 73 provided in the intake port 10A. It passes through both and is discharged to the outside of the housing 10.
  • the exhaust port 10B in a state where the intake fan 7 is rotating forward (a state where the exhaust fan 8A is rotating reversely), the exhaust port 10B is Since the air is partially opened, the air in the housing 10 can be smoothly discharged, and the dust attached to the filter 73 of the filter unit 70 provided at the exhaust port 10B is blown off and removed. Can be.
  • the exhaust port 10B In a state in which the intake fan 7 is rotated in the reverse direction (a state in which the exhaust fan 8A is rotated in the forward direction), the exhaust port 10B is closed by the filter 70, so that the exhaust port 10B is Dust intrusion can be prevented.
  • the system control unit 5 of the projector 100B may operate the vibration unit to vibrate the filter unit 70. Thereby, dust adhering to the filter unit 70 provided in the exhaust port 10B can be effectively removed.
  • the projectors 100, 100A, and 100B described so far may be used in a posture in which a direction perpendicular to the direction X1 and the direction Y1 (for example, a direction from the front to the back in FIG. 2) is a vertical direction. Good. Even in such a usage mode, it is possible to remove dust present inside the housing 10 in the cleaning mode.
  • a housing having an opening; A fan that takes in air into the housing from the opening in the state of normal rotation, and discharges air in the housing from the opening in the state of reverse rotation, A filter for capturing dust contained in air taken into the housing by the fan,
  • the filter unit has a rotating shaft extending in a direction perpendicular to a direction in which air is discharged by reverse rotation of the fan, and a filter configured to capture dust that is rotatable around the rotating shaft.
  • It is constituted by a plurality of filter units arranged in a direction perpendicular to the discharge direction and the rotation axis, The plurality of filter units are adjacent to each other in a state where the fan is rotating forward, the adjacent filter units contact each other to close the opening, and in a state where the fan is rotating reversely.
  • a projection device wherein the filter units are separated from each other, and a flow path through which air in the housing is discharged is formed in a gap between the adjacent filter units.
  • a driving unit that drives each of the plurality of filter units;
  • a projection device configured to contact the adjacent filter units when the fan is rotating forward, and to separate the adjacent filter units when the fan is rotating reversely; .
  • a projection apparatus further comprising a vibrating unit that vibrates the filter unit in a state where the fan is rotated in the reverse direction.
  • the opening includes a first opening and a second opening
  • the fan is an intake fan that is normally rotated in a projection mode for projecting an image, and is reversely rotated in a cleaning mode for removing dust, and the fan is rotated from the first opening in a normally rotated state.
  • An intake fan that takes in air into the housing and discharges the air in the housing from the first opening when the air is rotated in the reverse direction, and an exhaust fan that is rotated in the reverse direction in the projection mode and rotated forward in the cleaning mode
  • a fan that exhausts air from the housing through the second opening when the fan is rotated in the reverse direction, and takes air into the housing through the second opening when the fan is rotated in the normal direction.
  • the first filter section for capturing dust contained in air taken into the housing from the first opening in a state where the intake fan is rotating forward, and the exhaust fan is rotating forward.
  • a second filter section for capturing dust contained in air taken into the housing from the second opening in a state where the filter is in a state of being located.
  • a housing having an opening, and a fan for taking air into the housing from the opening in a state of normal rotation and discharging air in the housing from the opening in a state of reverse rotation.
  • a filter unit for capturing dust contained in air taken into the housing by the fan, and The filter unit has a rotation shaft extending in a direction perpendicular to a direction in which air is discharged by reverse rotation of the fan, and a filter configured to capture dust that is rotatable around the rotation shaft.
  • It is constituted by a plurality of filter units arranged in a direction perpendicular to the discharge direction and the rotation axis, In the state where the fan is rotating forward, the openings are closed by the plurality of filter units by contacting the adjacent filter units, and in the state where the fan is rotating reversely, the adjacent filter units are closed.
  • a control method for a projection apparatus wherein a filter unit is separated from each other, and a flow path through which air in the housing is discharged is formed in a gap between the adjacent filter units.
  • the present invention is highly convenient and effective when applied to a liquid crystal projector or the like.

Abstract

The present invention provides a projection device capable of preventing dust from adhering to members inside a housing, and a control method therefor. A projector (100) is provided with: a suction fan (7) which takes in air W1 from a suction port (10A) into a housing (10) during normal rotation, and discharges air W2 in the housing (10) from the suction port (10A) during reverse rotation; and a filter part (70) which is provided in the suction port (10A). The filter part (70) is composed of a plurality of filter units (71) arranged in a direction Y1. The plurality of filter units (71) block the suction port (10A) by adjacent ones thereof coming into contact with each other during the normal rotation of the suction fan (7), and forms a flow channel from which the air W2 is discharged in a gap between the adjacent filter units (71) by adjacent ones thereof being separated during the reverse rotation of the suction fan (7).

Description

投影装置とその制御方法Projection apparatus and control method thereof
　本発明は、投影装置とその制御方法に関する。 The present invention relates to a projection device and a control method thereof.
　投影装置としてのプロジェクタは、光源、光源からの光を空間変調する光変調素子、及び電源回路等の温度上昇の大きい部材（以下、被冷却部材という）を有するため、これらの被冷却部材を空気によって冷却するためのファンを搭載するのが一般的である。 A projector as a projection device includes a light source, a light modulation element that spatially modulates light from the light source, and a member having a large temperature rise (hereinafter, referred to as a member to be cooled) such as a power supply circuit. It is common to mount a fan for cooling.
　特許文献１には、外装を構成する筐体と、筐体に設置された開口部と、この開口部を介して正回転動作により外気を筐体内部に吸入し、逆回転動作により筐体内部の空気を電子機器の外部へ排出するファンと、開口部とファンとの間に配置され、塵埃の筐体内部への侵入を防ぐフィルタと、を備えるプロジェクタが記載されている。 Patent Literature 1 discloses a housing that constitutes an exterior, an opening provided in the housing, and outside air that is sucked into the housing by a forward rotation operation through the opening, and the inside of the housing is rotated by a reverse rotation operation. There is described a projector that includes a fan that discharges air from outside of the electronic device, and a filter that is disposed between the opening and the fan and that prevents dust from entering the inside of the housing.
　特許文献２には、外部の空気を取り込むための吸気口を有する外装筐体と、吸気口を覆い、外装筐体の内部に塵埃が侵入することを抑制する防塵フィルタとを備えるプロジェクタが記載されている。このプロジェクタは、防塵フィルタが目詰まりを起こし十分な吸気ができない場合に、防塵フィルタが動いて筐体と防塵フィルタの間に隙間を形成し、吸気量を確保している。 Patent Literature 2 discloses a projector including an exterior housing having an air intake port for taking in external air, and a dustproof filter that covers the air intake port and suppresses dust from entering the interior of the exterior housing. ing. In this projector, when the dustproof filter is clogged and sufficient air cannot be taken, the dustproof filter moves to form a gap between the housing and the dustproof filter to secure a sufficient amount of air intake.
　特許文献３には、フィルタ交換時における筐体内部への塵埃の侵入を防ぐために、吸気口を塞ぐための蓋を有するプロジェクタが記載されている。 Patent Document 3 describes a projector having a lid for closing an air intake port in order to prevent dust from entering the inside of a housing when a filter is replaced.
　特許文献４には、筐体に形成された開口部と、開口部に設けられこの開口部の開口状態を可変自在な風導板と、筐体内部に設けられ、この筐体内部に冷却空気を通過させる風量を可変自在なファンと、装置の運転時にこのファンの風量に適合するように風導板の開口状態を制御する制御手段と、を備える映像投射装置が記載されている。 Patent Literature 4 discloses an opening formed in a housing, an air guide plate provided in the opening, the opening state of which can be changed, and a cooling air provided in the housing and provided in the housing. An image projection device is described which includes a fan capable of changing a flow rate of air passing through the fan and a control unit for controlling an opening state of a wind guide plate so as to match the flow rate of the fan during operation of the apparatus.
日本国特開２００８－０６０１０８号公報Japanese Patent Application Laid-Open No. 2008-060108 日本国特開２０１４－０８１６５１号公報JP-A-2014-081651 日本国特開２００７－２４１００２号公報Japanese Patent Application Laid-Open No. 2007-241002 日本国特開２００４－２３３７９６号公報Japanese Patent Application Laid-Open No. 2004-233796
　吸気用ファンに対向して設けられる集塵用のフィルタは、吸気用ファンを正回転させて吸気しているときには、プロジェクタの筐体外部の粉塵が筐体内部に侵入するのを防ぐ役割を果たす。一方、特許文献１に記載されているように、この吸気用ファンを逆回転させた場合には、この逆回転による風圧によって、このフィルタに付着している粉塵の除去が可能となる。しかし、吸気用ファンを逆回転させると、筐体内部に粉塵が存在していた場合には、この粉塵がフィルタに付着する可能性がある。そして、吸気用ファンの正回転時には、この粉塵が筐体内部に戻ってしまうことになる。したがって、筐体内部に侵入してしまった粉塵についてはその除去が難しいという課題がある。特許文献１にはこういった課題とその解決手段について記載されていない。特許文献２－４は、吸気用ファンを逆回転させることは想定しておらず、上述した課題の認識はない。 The dust collecting filter provided opposite to the intake fan prevents dust from outside the housing of the projector from entering the inside of the housing when the intake fan is rotated in the forward direction and the air is sucked. . On the other hand, as described in Patent Document 1, when the intake fan is rotated in the reverse direction, dust adhering to the filter can be removed by the wind pressure due to the reverse rotation. However, when the intake fan is rotated in the reverse direction, if dust is present inside the housing, the dust may adhere to the filter. When the intake fan rotates forward, the dust returns to the inside of the housing. Therefore, there is a problem that it is difficult to remove dust that has entered the inside of the housing. Patent Literature 1 does not describe these problems and their solutions. Patent Documents 2-4 do not assume that the intake fan is rotated in the reverse direction, and do not recognize the problem described above.
　本発明は、上記事情に鑑みてなされたものであり、筐体内部の部材への粉塵の付着を防ぐことのできる投影装置とその制御方法を提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a projection device that can prevent dust from adhering to members inside a housing and a control method thereof.
　本発明の投影装置は、開口部を有する筐体と、正回転されている状態においては上記開口部から上記筐体内に空気を取り込み、逆回転されている状態においては上記筐体内の空気を上記開口部から排出するファンと、上記ファンによって上記筐体内に取り込まれる空気に含まれる粉塵を捕捉するためのフィルタ部と、を備え、上記フィルタ部は、上記ファンの逆回転による空気の排出方向と垂直な方向に延びる回転軸と、上記回転軸を中心に回動自在に構成された粉塵を捕捉するためのフィルタと、を有する、上記排出方向及び上記回転軸と垂直な方向に並ぶ複数のフィルタユニットによって構成され、上記複数のフィルタユニットは、上記ファンが正回転されている状態においては、隣接する上記フィルタユニット同士が接触して上記開口部を閉塞し、上記ファンが逆回転されている状態においては、隣接する上記フィルタユニット同士が離間して、隣接する上記フィルタユニット同士の隙間に、上記筐体内の空気が排出される流路を形成するものである。 The projection device of the present invention includes a housing having an opening, and takes air into the housing from the opening in a state where the housing is normally rotated, and draws air in the housing in a state where the housing is rotated in the reverse direction. A fan for discharging dust contained in air taken into the housing by the fan, and a filter for catching dust contained in air taken into the housing by the fan, wherein the filter has a direction in which air is discharged by reverse rotation of the fan. A plurality of filters arranged in the discharge direction and in a direction perpendicular to the rotation axis, the filter including: a rotation axis extending in a vertical direction; and a filter configured to be rotatable about the rotation axis for capturing dust. The plurality of filter units are arranged such that when the fan is rotating forward, the adjacent filter units come into contact with each other to open the filter unit. When the fan is rotated in the reverse direction, the adjacent filter units are separated from each other, and a space through which air in the housing is discharged is provided in a gap between the adjacent filter units. To form.
　本発明の投影装置の制御方法は、開口部を有する筐体と、正回転されている状態においては上記開口部から上記筐体内に空気を取り込み、逆回転されている状態においては上記筐体内の空気を上記開口部から排出するファンと、上記ファンによって上記筐体内に取り込まれる空気に含まれる粉塵を捕捉するためのフィルタ部と、を有する投影装置の制御方法であって、上記フィルタ部は、上記ファンの逆回転による空気の排出方向と垂直な方向に延びる回転軸と、上記回転軸を中心に回動自在に構成された粉塵を捕捉するためのフィルタと、を有する、上記排出方向及び上記回転軸と垂直な方向に並ぶ複数のフィルタユニットによって構成され、上記ファンが正回転されている状態においては、隣接する上記フィルタユニット同士を接触させて上記複数のフィルタユニットにより上記開口部を閉塞し、上記ファンが逆回転されている状態においては、隣接する上記フィルタユニット同士を離間させて、隣接する上記フィルタユニット同士の隙間に、上記筐体内の空気が排出される流路を形成するものである。 The method of controlling a projection device according to the present invention includes a housing having an opening, and taking air into the housing from the opening in a state where the housing is normally rotated, and a case in the housing in a state where the housing is rotated in a reverse direction. A method for controlling a projection device, comprising: a fan that discharges air from the opening, and a filter unit that captures dust contained in air taken into the housing by the fan, wherein the filter unit includes: A rotating shaft extending in a direction perpendicular to a direction in which air is discharged by the reverse rotation of the fan, and a filter configured to capture dust that is rotatable about the rotating shaft. It is constituted by a plurality of filter units arranged in a direction perpendicular to the rotation axis, and when the fan is rotating forward, the adjacent filter units are brought into contact with each other. In the state in which the opening is closed by the plurality of filter units and the fan is rotated in the reverse direction, the adjacent filter units are separated from each other, and a gap between the adjacent filter units is provided in the housing. To form a flow path through which the air is discharged.
　本発明によれば、筐体内部の部材への粉塵の付着を防ぐことのできる投影装置とその制御方法を提供することができる。 According to the present invention, it is possible to provide a projection device capable of preventing dust from adhering to a member inside a housing and a control method thereof.
本発明の投影装置の一実施形態であるプロジェクタ１００の概略構成を示す模式図である。FIG. 1 is a schematic diagram illustrating a schematic configuration of a projector 100 that is an embodiment of a projection device of the present invention. 図１に示した吸気ファン７が正回転している状態における図１の範囲Ａの断面模式図である。FIG. 2 is a schematic cross-sectional view of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward. 図１に示した吸気ファン７が逆回転している状態における図１の範囲Ａの断面模式図である。FIG. 2 is a schematic cross-sectional view of a range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. 図１に示した吸気ファン７が正回転している状態における図１の範囲Ａの変形例を示す断面模式図である。FIG. 4 is a schematic cross-sectional view showing a modification of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward. 図１に示した吸気ファン７が逆回転している状態における図１の範囲Ａの変形例を示す断面模式図である。FIG. 3 is a schematic cross-sectional view showing a modification of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. 図１に示すプロジェクタ１００の第一の変形例であるプロジェクタ１００Ａの概略構成を示す模式図である。FIG. 9 is a schematic diagram showing a schematic configuration of a projector 100A which is a first modification of the projector 100 shown in FIG. 図１に示した吸気ファン７が正回転している状態における図１の範囲Ａの変形例を示す断面模式図である。FIG. 4 is a schematic cross-sectional view showing a modification of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward. 図１に示した吸気ファン７が逆回転している状態における図１の範囲Ａの変形例を示す断面模式図である。FIG. 3 is a schematic cross-sectional view showing a modification of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. 図１に示すプロジェクタ１００の第二の変形例であるプロジェクタ１００Ｂの概略構成を示す模式図である。FIG. 9 is a schematic diagram showing a schematic configuration of a projector 100B which is a second modification of the projector 100 shown in FIG. 図９に示した排気ファン８Ａが逆回転している状態における図９の範囲Ｂの断面模式図である。FIG. 10 is a schematic cross-sectional view of a range B in FIG. 9 in a state where the exhaust fan 8A illustrated in FIG. 9 is rotating in the reverse direction. 図９に示した排気ファン８Ａが正回転している状態における図９の範囲Ｂの断面模式図である。FIG. 10 is a schematic sectional view of a range B in FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating forward.
　以下、本発明の実施形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
　図１は、本発明の投影装置の一実施形態であるプロジェクタ１００の概略構成を示す模式図である。プロジェクタ１００は、金属又は樹脂等からなる筐体１０と、筐体１０の内部に設けられた、光源ユニット２、光変調素子３、投影光学系４、システム制御部５、吸気ファン７、及び排気ファン８と、筐体１０に形成された吸気口１０Ａに設けられたフィルタ部７０と、を備える。 FIG. 1 is a schematic diagram showing a schematic configuration of a projector 100 which is an embodiment of the projection device of the present invention. The projector 100 includes a housing 10 made of metal, resin, or the like, and a light source unit 2, a light modulation element 3, a projection optical system 4, a system control unit 5, an intake fan 7, and an exhaust provided inside the housing 10. The air conditioner includes a fan 8 and a filter unit 70 provided at an intake port 10 </ b> A formed in the housing 10.
　光源ユニット２は、白色光を出射する光源２１と、カラーホイール２２と、照明光学系２３と、を備える。光源２１は、レーザ又はＬＥＤ（Ｌｉｇｈｔ　Ｅｍｉｔｔｉｎｇ　Ｄｉｏｄｅ）等の発光素子を含んで構成される。カラーホイール２２は、光源２１と照明光学系２３の間に配置されている。カラーホイール２２は、円板状の部材であり、その周方向に沿って、赤色光を透過するＲフィルタ、緑色光を透過するＧフィルタ、及び青色光を透過するＢフィルタが設けられている。カラーホイール２２は軸周りに回転され、光源２１から出射される白色光を時分割にて赤色光、緑色光、及び青色光に分光して照明光学系２３に導く。照明光学系２３から出射された光は光変調素子３に入射される。 The light source unit 2 includes a light source 21 that emits white light, a color wheel 22, and an illumination optical system 23. The light source 21 is configured to include a light emitting element such as a laser or an LED (Light Emitting Diode). The color wheel 22 is disposed between the light source 21 and the illumination optical system 23. The color wheel 22 is a disk-shaped member, and provided along its circumferential direction are an R filter that transmits red light, a G filter that transmits green light, and a B filter that transmits blue light. The color wheel 22 is rotated around an axis, and splits white light emitted from the light source 21 into red light, green light, and blue light in a time-sharing manner and guides the white light to the illumination optical system 23. Light emitted from the illumination optical system 23 enters the light modulation element 3.
　光変調素子３は、照明光学系２３から出射された光を画像データに基づいて空間変調し、空間変調した光を投影光学系４に出射する。 The light modulation element 3 spatially modulates the light emitted from the illumination optical system 23 based on the image data, and emits the spatially modulated light to the projection optical system 4.
　図１に示すプロジェクタ１００は、光変調素子３としてＤＭＤ（Ｄｉｇｉｔａｌ　Ｍｉｃｒｏｍｉｒｒｏｒ　Ｄｅｖｉｃｅ）を用いた例であるが、光変調素子３としては、例えば、ＬＣＯＳ（Ｌｉｑｕｉｄ　ｃｒｙｓｔａｌ　ｏｎ　ｓｉｌｉｃｏｎ）、ＭＥＭＳ（Ｍｉｃｒｏ　Ｅｌｅｃｔｒｏ　Ｍｅｃｈａｎｉｃａｌ　Ｓｙｓｔｅｍｓ）素子、又は液晶表示素子等を用いることも可能である。 The projector 100 shown in FIG. 1 is an example in which a DMD (Digital Micromirror Device) is used as the light modulation element 3, but the light modulation element 3 is, for example, LCOS (Liquid Crystal on Silicon) or MEMS (Micro Electro Mechanical Systems). It is also possible to use an element, a liquid crystal display element, or the like.
　投影光学系４は、光変調素子３からの光が入射されるものであり、少なくとも１つのレンズを含む。投影光学系４を通過した光は筐体１０に設けられた開口を通って図示省略のスクリーンに投射される。 The projection optical system 4 receives the light from the light modulation element 3 and includes at least one lens. Light that has passed through the projection optical system 4 is projected on a screen (not shown) through an opening provided in the housing 10.
　吸気ファン７は、筐体１０に形成された開口部によって構成される吸気口１０Ａに対向する位置に設けられている。吸気ファン７は、その回転方向を正逆切替可能となっている。吸気ファン７は、一方向に回転（正回転）されている状態においては、吸気口１０Ａから筐体１０内に空気を取り込み、この一方向の反対方向に回転（逆回転）されている状態においては、筐体１０内の空気を吸気口１０Ａから排出する。 (4) The intake fan 7 is provided at a position facing the intake port 10A formed by the opening formed in the housing 10. The rotation direction of the intake fan 7 can be switched between forward and reverse. In a state where the intake fan 7 is rotated in one direction (forward rotation), air is taken into the casing 10 from the intake port 10A, and in a state where the air is rotated in the opposite direction to this one direction (reverse rotation). Discharges the air in the housing 10 from the inlet 10A.
　吸気ファン７が正回転することによって筐体１０内に取り込まれた空気は、例えば光源２１、光変調素子３、又は図示省略の電源回路等の被冷却部材に吹き当てられて、これらを冷却する。吸気ファン７はシステム制御部５によって制御される。プロジェクタ１００において、吸気口１０Ａは開口部を構成し、吸気ファン７はファンを構成する。 The air taken into the casing 10 by the forward rotation of the intake fan 7 is blown against a member to be cooled such as the light source 21, the light modulation element 3, or a power supply circuit (not shown) to cool them. . The intake fan 7 is controlled by the system control unit 5. In the projector 100, the intake port 10A constitutes an opening, and the intake fan 7 constitutes a fan.
　吸気口１０Ａに設けられたフィルタ部７０は、吸気ファン７によって筐体１０内に取り込まれる空気に含まれる粉塵を捕捉するために設けられている。 フ ィ ル タ The filter unit 70 provided at the intake port 10A is provided to capture dust contained in air taken into the housing 10 by the intake fan 7.
　排気ファン８は、筐体１０に形成された開口部によって構成される排気口１０Ｂに対向する位置に設けられており、筐体１０内の空気を排気口１０Ｂから排出する。排気ファン８はシステム制御部５によって制御される。排気口１０Ｂには、図示省略のフィルタが嵌合されており、このフィルタによって、排気口１０Ｂから筐体１０内への粉塵の侵入が防止されている。 The exhaust fan 8 is provided at a position facing the exhaust port 10B formed by the opening formed in the housing 10, and discharges the air in the housing 10 from the exhaust port 10B. The exhaust fan 8 is controlled by the system control unit 5. A filter (not shown) is fitted to the exhaust port 10B, and the filter prevents dust from entering the housing 10 from the exhaust port 10B.
　システム制御部５は、光源ユニット２の制御、光変調素子３の制御、吸気ファン７の制御、及び排気ファン８の制御等を行うものであり、プロセッサと、ＲＯＭ（Ｒｅａｄ　Ｏｎｌｙ　Ｍｅｍｏｒｙ）と、ＲＡＭ（Ｒａｎｄｏｍ　Ａｃｃｓｅｓｓ　Ｍｅｍｏｒｙ）と、を備える。 The system control unit 5 controls the light source unit 2, controls the light modulation element 3, controls the intake fan 7, controls the exhaust fan 8, and the like, and includes a processor, a ROM (Read Only Memory), and a RAM. (Random @ Access @ Memory).
　プロセッサとしては、プログラムを実行して各種処理を行う汎用的なプロセッサであるＣＰＵ（Ｃｅｎｔｒａｌ　Ｐｒｏｓｅｓｓｉｎｇ　Ｕｎｉｔ）、ＦＰＧＡ（Ｆｉｅｌｄ　Ｐｒｏｇｒａｍｍａｂｌｅ　Ｇａｔｅ　Ａｒｒａｙ）等の製造後に回路構成を変更可能なプロセッサであるプログラマブルロジックデバイス（Ｐｒｏｇｒａｍｍａｂｌｅ　Ｌｏｇｉｃ　Ｄｅｖｉｃｅ：ＰＬＤ）、又はＡＳＩＣ（Ａｐｐｌｉｃａｔｉｏｎ　Ｓｐｅｃｉｆｉｃ　Ｉｎｔｅｇｒａｔｅｄ　Ｃｉｒｃｕｉｔ）等の特定の処理を実行させるために専用に設計された回路構成を有するプロセッサである専用電気回路等が含まれる。 As the processor, a programmable logic device (CPU) (Central Processing Unit), which is a general-purpose processor for executing various processes by executing a program, or a processor capable of changing a circuit configuration after manufacturing, such as an FPGA (Field Programmable Gate Array). A dedicated electric circuit, which is a processor having a circuit configuration specifically designed to execute a specific process such as Programmable Logic Device (PLD) or ASIC (Application Specific Integrated Circuit), is included.
　これらプロセッサの構造は、より具体的には、半導体素子等の回路素子を組み合わせた電気回路である。 The structure of these processors is more specifically an electric circuit combining circuit elements such as semiconductor elements.
　システム制御部５のプロセッサは、上述した各種のプロセッサのうちの１つで構成されてもよいし、同種又は異種の２つ以上のプロセッサの組み合わせ（例えば、複数のＦＰＧＡの組み合わせ又はＣＰＵとＦＰＧＡの組み合わせ）で構成されてもよい。 The processor of the system control unit 5 may be configured by one of the various processors described above, or a combination of two or more processors of the same type or different types (for example, a combination of a plurality of FPGAs or a combination of a CPU and an FPGA). Combination).
　図２は、図１に示した吸気ファン７が正回転している状態における図１の範囲Ａの断面模式図である。図３は、図１に示した吸気ファン７が逆回転している状態における図１の範囲Ａの断面模式図である。 FIG. 2 is a schematic cross-sectional view of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward. FIG. 3 is a schematic sectional view of a range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction.
　プロジェクタ１００は、図２及び図３に示された方向Ｙ１が鉛直方向となる姿勢にて使用されることを前提としている。図２及び図３に示された方向Ｙ２は鉛直方向の反対方向である。図２及び図３に示された方向Ｘ２は、吸気ファン７が正回転している状態における筐体１０内への空気の吸引方向である。図２及び図３に示された方向Ｘ１は、吸気ファン７が逆回転している状態における筐体１０内の空気の排出方向であり、方向Ｘ２の反対方向となっている。方向Ｙ１と方向Ｘ１は直交している。 The projector 100 is assumed to be used in a posture in which the direction Y1 shown in FIGS. 2 and 3 is a vertical direction. The direction Y2 shown in FIGS. 2 and 3 is a direction opposite to the vertical direction. The direction X2 shown in FIGS. 2 and 3 is the direction of suction of air into the housing 10 when the intake fan 7 is rotating forward. A direction X1 shown in FIGS. 2 and 3 is a direction in which the air is discharged from the housing 10 when the intake fan 7 is rotating in the reverse direction, and is opposite to the direction X2. The direction Y1 is orthogonal to the direction X1.
　図２及び図３に示すように、フィルタ部７０は、複数（図２及び図３の例では５個）のフィルタユニット７１を備える。フィルタユニット７１は、方向Ｘ１及び方向Ｙ１と垂直な方向（図２及び図３の紙面手前から奥に向かう方向）に延びる回転軸７２と、回転軸７２を中心に回動自在に回転軸７２により支持された、粉塵を捕捉するための例えばメッシュ状且つ平板状のフィルタ７３と、により構成されている。 フ ィ ル タ As shown in FIGS. 2 and 3, the filter unit 70 includes a plurality of (five in the example of FIGS. 2 and 3) filter units 71. The filter unit 71 includes a rotation shaft 72 extending in a direction perpendicular to the direction X1 and the direction Y1 (a direction from the front to the back of the paper of FIGS. 2 and 3), and a rotation shaft 72 rotatably around the rotation shaft 72. The filter 73 is supported by, for example, a mesh-shaped and plate-shaped filter 73 for capturing dust.
　５つのフィルタユニット７１は、回転軸７２の延びる方向及び方向Ｘ１と垂直な方向、すなわち、方向Ｙ１又は方向Ｙ２に配列されている。回転軸７２は、吸気口１０Ａに嵌合された図示省略の枠体によって支持されている。 The five filter units 71 are arranged in the direction in which the rotating shaft 72 extends and in the direction perpendicular to the direction X1, that is, in the direction Y1 or the direction Y2. The rotating shaft 72 is supported by a frame (not shown) fitted to the intake port 10A.
　フィルタ部７０の各フィルタユニット７１におけるフィルタ７３の回転軸７２側と反対側の端部（先端）の方向Ｘ１における位置は、フィルタ部７０の各フィルタユニット７１における回転軸７２の方向Ｘ１における位置よりも方向Ｘ１側（図２及び図３中の右側）となっている。 The position in the direction X1 of the end (tip) of the filter unit 70 of the filter unit 70 opposite to the rotation shaft 72 side of the filter 73 is smaller than the position of the filter unit 70 in the direction X1 of the rotation shaft 72 in each filter unit 71. Is also on the direction X1 side (the right side in FIGS. 2 and 3).
　フィルタ部７０の各フィルタユニット７１におけるフィルタ７３は、吸気ファン７が停止している状態においては、その自重によって、方向Ｙ１側に隣接するフィルタユニット７１の回転軸７２と接触するよう構成されている。また、フィルタ部７０の各フィルタユニット７１におけるフィルタ７３は、吸気ファン７が正回転している状態においては、吸気ファン７により筐体１０内に吸引される空気Ｗ１（図２参照）の風圧と自重とによって、方向Ｙ１側に隣接するフィルタユニット７１の回転軸７２と接触するよう構成されている。このように、吸気ファン７が停止している状態と、吸気ファン７が正回転している状態とにおいて、フィルタ部７０は、５つのフィルタユニット７１によって吸気口１０Ａを閉塞する構成となっている。 The filter 73 in each filter unit 71 of the filter unit 70 is configured to contact the rotation shaft 72 of the filter unit 71 adjacent in the direction Y1 due to its own weight when the intake fan 7 is stopped. . Further, the filter 73 in each filter unit 71 of the filter unit 70 controls the wind pressure of the air W1 (see FIG. 2) sucked into the housing 10 by the intake fan 7 when the intake fan 7 is rotating forward. Due to its own weight, the filter unit 71 is configured to be in contact with the rotation shaft 72 of the filter unit 71 adjacent to the direction Y1. As described above, in the state where the intake fan 7 is stopped and the state where the intake fan 7 is rotating forward, the filter unit 70 is configured to block the intake port 10A by the five filter units 71. .
　また、フィルタ部７０の各フィルタユニット７１におけるフィルタ７３は、吸気ファン７が逆回転している状態においては、吸気ファン７によって筐体１０外に排出される空気Ｗ２（図３参照）の風圧によって、方向Ｙ１に隣接するフィルタユニット７１の回転軸７２から離間するよう構成されている。なお、フィルタ７３は、筐体１０の内部を向く側の面と方向Ｙ１とのなす角度θ（図３参照）が最大でも９０度となるように、その回動量が制限されている。図３の例では、角度θの最大値が９０度未満（例えば４５度）とされている。 Further, the filter 73 in each filter unit 71 of the filter unit 70 is controlled by the wind pressure of the air W2 (see FIG. 3) discharged from the housing 10 by the intake fan 7 when the intake fan 7 is rotating in the reverse direction. , The filter unit 71 is separated from the rotation shaft 72 of the filter unit 71 adjacent in the direction Y1. The amount of rotation of the filter 73 is limited so that the angle θ (see FIG. 3) between the surface facing the inside of the housing 10 and the direction Y1 is 90 degrees at the maximum. In the example of FIG. 3, the maximum value of the angle θ is less than 90 degrees (for example, 45 degrees).
　図３に示すように、フィルタ部７０は、吸気ファン７が逆回転している状態においては、５つのフィルタユニット７１同士が離間して、隣接するフィルタユニット７１同士の隙間に、空気Ｗ２が排出される経路を形成する構成となっている。 As illustrated in FIG. 3, when the intake fan 7 is rotating in the reverse direction, the five filter units 71 are separated from each other, and the air W2 is discharged into the gap between the adjacent filter units 71. It is configured to form a route to be performed.
　以上のように構成されプロジェクタ１００には、スクリーンへの画像の投影を行う投影モードに加えて、フィルタ部７０の各フィルタ７３に捕捉された粉塵を除去するための清掃モードが設けられている。この清掃モードは、例えば、プロジェクタ１００の電源をオフにする操作がなされた場合等に自動的に開始されたり、手動にて開始させたりすることができる。 The projector 100 configured as described above is provided with a cleaning mode for removing dust captured by each filter 73 of the filter unit 70 in addition to a projection mode for projecting an image on a screen. This cleaning mode can be automatically started, for example, when an operation of turning off the power of the projector 100 is performed, or can be manually started.
　システム制御部５は、投影モードにおいては、吸気ファン７を正回転させる。吸気ファン７が正回転されている状態においては、図２に示すように、吸気口１０Ａは５つのフィルタユニット７１によって閉塞される。そのため、吸気口１０Ａに吸引される空気Ｗ１に含まれる粉塵は、フィルタ部７０の各フィルタ７３によって捕捉され、筐体１０内部への侵入が防止される。 The system control unit 5 rotates the intake fan 7 forward in the projection mode. In a state where the intake fan 7 is rotating forward, the intake port 10A is closed by the five filter units 71 as shown in FIG. Therefore, dust contained in the air W1 sucked into the intake port 10A is captured by each filter 73 of the filter unit 70, and is prevented from entering the inside of the housing 10.
　システム制御部５は、清掃モードにおいては、吸気ファン７を逆回転させる。吸気ファン７が逆回転されている状態においては、図３に示すように、フィルタ７３が図２に示す状態から方向Ｘ１に向かって回動する。そして、吸気口１０Ａは、隣接するフィルタユニット７１同士の隙間によって部分的に開放された状態となる。そのため、筐体１０内部の空気Ｗ２は、フィルタ部７０の各フィルタ７３を通過すると共に、隣接するフィルタユニット７１同士の隙間に形成された流路も通過することになる。これにより、フィルタ７３における筐体１０を向く側の面の反対面に捕捉されていた粉塵は、フィルタ７３と上記の流路とを通過する空気Ｗ２によって方向Ｘ１へと吹き飛ばされて除去される。 In the cleaning mode, the system control unit 5 rotates the intake fan 7 in the reverse direction. When the intake fan 7 is rotated in the reverse direction, as shown in FIG. 3, the filter 73 rotates in the direction X1 from the state shown in FIG. Then, the intake port 10A is partially opened by the gap between the adjacent filter units 71. Therefore, the air W2 inside the casing 10 passes through each filter 73 of the filter unit 70 and also passes through a flow path formed in a gap between the adjacent filter units 71. As a result, dust trapped on the surface of the filter 73 opposite to the surface facing the housing 10 is removed by being blown off in the direction X1 by the air W2 passing through the filter 73 and the flow path.
　ここで、空気Ｗ２に粉塵が含まれていた場合を想定すると、フィルタ７３における筐体１０を向く側の面には、この粉塵が付着する可能性がある。しかし、上記の流路にそって空気Ｗ２が流れることで、この面に付着した粉塵はこの流路に沿って方向Ｘ１へと吹き飛ばされて除去される。 Here, assuming that the air W2 contains dust, the dust may adhere to the surface of the filter 73 facing the housing 10. However, when the air W2 flows along the flow path, dust adhering to this surface is blown off in the direction X1 along the flow path and removed.
　システム制御部５は、清掃モードを開始してから予め決められた時間が経過すると、吸気ファン７を停止させて清掃モードを終了する。これにより、フィルタ部７０の各フィルタ７３は図３の状態から方向Ｘ２に回動して図２に示す状態に戻る。 When the predetermined time has elapsed since the start of the cleaning mode, the system controller 5 stops the intake fan 7 and ends the cleaning mode. Thereby, each filter 73 of the filter unit 70 rotates in the direction X2 from the state of FIG. 3 and returns to the state shown in FIG.
　以上のようにプロジェクタ１００によれば、清掃モード時において、筐体１０内部に粉塵が存在していた場合であっても、この粉塵を、フィルタユニット７１同士の隙間に形成された流路から筐体１０の外部に排出することができる。このため、投影モード時に、この粉塵が筐体１０の内部に戻ることはなく、筐体１０内部の部材への粉塵の付着を防ぐことができる。 As described above, according to the projector 100, even when dust is present inside the casing 10 in the cleaning mode, the dust is removed from the flow passage formed in the gap between the filter units 71 by the casing 100. It can be discharged outside the body 10. For this reason, in the projection mode, the dust does not return to the inside of the housing 10, and the adhesion of the dust to members inside the housing 10 can be prevented.
　また、プロジェクタ１００によれば、清掃モードにおいて吸気ファン７が逆回転されている状態においては、フィルタ部７０の各フィルタ７３が、吸気ファン７による空気Ｗ２の排出方向に向かって回動して上記の流路を形成する。このため、フィルタユニット７１同士の隙間に形成される流路の出口を吸気口１０Ａの外側に形成することができ、筐体１０内部の粉塵の除去を効果的に行うことができる。また、この構成によれば、吸気ファン７の回転により生じる風圧のみによってフィルタ７３を回動させることができ、プロジェクタ１００の小型化と製造コストの削減が可能になる。 Further, according to the projector 100, when the intake fan 7 is rotated in the reverse direction in the cleaning mode, each filter 73 of the filter unit 70 rotates toward the discharge direction of the air W2 by the intake fan 7, and Is formed. For this reason, the outlet of the flow path formed in the gap between the filter units 71 can be formed outside the intake port 10A, and the dust inside the housing 10 can be effectively removed. Further, according to this configuration, the filter 73 can be rotated only by the wind pressure generated by the rotation of the intake fan 7, so that the size of the projector 100 and the manufacturing cost can be reduced.
　また、プロジェクタ１００によれば、図３に示すように、吸気ファン７が逆回転されている状態においては、フィルタ部７０の各フィルタ７３は、空気Ｗ２の排出方向である方向Ｘ１に対して傾斜した状態となる。上述したように、角度θの最大値を９０度とすることも可能であるが、この最大値を９０度未満とすることで、フィルタ７３における筐体１０の内部を向く側の面に対し空気Ｗ２を強く吹き当てることができる。このため、筐体１０内部の粉塵の除去を効果的に行うことができる。 According to the projector 100, as shown in FIG. 3, when the intake fan 7 is rotated in the reverse direction, each filter 73 of the filter unit 70 is inclined with respect to the direction X1, which is the direction of discharging the air W2. It will be in the state of having done. As described above, it is possible to set the maximum value of the angle θ to 90 degrees. However, by setting the maximum value to less than 90 degrees, the air on the surface of the filter 73 facing the inside of the housing 10 becomes air-tight. W2 can be blown strongly. For this reason, dust inside the housing 10 can be effectively removed.
　また、角度θの最大値が９０度未満となっていることで、フィルタユニット７１同士の隙間に形成される流路に沿った空気Ｗ２の流れる方向を鉛直方向に近づけることができる。このため、流路を流れる空気Ｗ２の風圧と粉塵に作用する重力との相乗効果によって、フィルタ７３の筐体１０内部を向く側の面に付着した粉塵の除去能力を高めることができる。 In addition, since the maximum value of the angle θ is less than 90 degrees, the direction in which the air W2 flows along the flow path formed in the gap between the filter units 71 can be made closer to the vertical direction. For this reason, the ability of removing the dust adhering to the surface of the filter 73 facing the inside of the housing 10 can be enhanced by the synergistic effect of the wind pressure of the air W2 flowing through the flow path and the gravity acting on the dust.
　なお、プロジェクタ１００において、回転軸７２は、図示省略のモータ等の駆動部によって電気的に駆動される構成としてもよい。この場合、このモータはシステム制御部５によって制御される。そして、システム制御部５は、吸気ファン７を正回転させている図２の状態においては、モータを制御して、隣接するフィルタユニット７１同士が接触する位置にフィルタ７３を回動させる。また、システム制御部５は、吸気ファン７を逆回転させている図３の状態においては、モータを制御して、隣接するフィルタユニット７１同士が離間する位置にフィルタ７３を回動させる。 In the projector 100, the rotating shaft 72 may be electrically driven by a driving unit such as a motor (not shown). In this case, this motor is controlled by the system control unit 5. Then, in the state of FIG. 2 in which the intake fan 7 is normally rotated, the system control unit 5 controls the motor to rotate the filter 73 to a position where the adjacent filter units 71 contact each other. In the state shown in FIG. 3 in which the intake fan 7 is rotated in the reverse direction, the system control unit 5 controls the motor to rotate the filter 73 to a position where the adjacent filter units 71 are separated from each other.
　このように、回転軸７２を電気的に駆動する構成によれば、吸気口１０Ａを閉塞する状態と吸気口１０Ａを部分的に開放する状態とを電気的に切り替えることができる。このため、例えば、吸気ファン７の停止後又は吸気ファン７を停止させる直前のタイミング等にて、モータ制御によって吸気口１０Ａを閉塞することで、吸気口１０Ａから粉塵が侵入するのを強固に防ぐことができる。 According to the configuration in which the rotating shaft 72 is electrically driven, the state in which the intake port 10A is closed and the state in which the intake port 10A is partially opened can be electrically switched. For this reason, for example, after the intake fan 7 is stopped or immediately before the intake fan 7 is stopped, the intake port 10A is closed by the motor control, thereby firmly preventing dust from entering from the intake port 10A. be able to.
　また、回転軸７２をモータ駆動する構成であれば、吸気ファン７が逆回転されている状態においてフィルタユニット７１のフィルタ７３を方向Ｘ２に回動させて、隣接するフィルタユニット７１同士の隙間に流路を形成する構成を採用することができる。この構成について図４及び図５を参照して説明する。 If the rotation shaft 72 is driven by a motor, the filter 73 of the filter unit 71 is rotated in the direction X2 while the intake fan 7 is rotating in the reverse direction, so that the air flows through the gap between the adjacent filter units 71. A configuration for forming a road can be employed. This configuration will be described with reference to FIGS.
　図４は、図１に示した吸気ファン７が正回転している状態における図１の範囲Ａの変形例を示す断面模式図である。図５は、図１に示した吸気ファン７が逆回転している状態における図１の範囲Ａの変形例を示す断面模式図である。図４は、フィルタ部７０がフィルタ部７０Ａに変更された点を除いては図２と同じである。図５は、フィルタ部７０がフィルタ部７０Ａに変更された点を除いては図３と同じである。 FIG. 4 is a schematic cross-sectional view showing a modification of the range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward. FIG. 5 is a schematic cross-sectional view showing a modification of the range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. FIG. 4 is the same as FIG. 2 except that the filter unit 70 is changed to a filter unit 70A. FIG. 5 is the same as FIG. 3 except that the filter unit 70 is changed to a filter unit 70A.
　フィルタ部７０Ａは、フィルタユニット７１のフィルタ７３の先端の位置が、回転軸７２よりも方向Ｘ２側にある点と、フィルタユニット７１の回転軸７２がモータによって駆動される点と、吸気ファン７が逆回転されている図５の状態においては、吸気ファン７が正回転されている図４の状態に対し、フィルタ７３が方向Ｘ２に回動されてフィルタユニット７１同士の隙間に流路を形成する点と、がフィルタ部７０とは異なる。 The filter unit 70A is configured such that the position of the tip of the filter 73 of the filter unit 71 is on the direction X2 side of the rotation shaft 72, that the rotation shaft 72 of the filter unit 71 is driven by the motor, 5, the filter 73 is rotated in the direction X2 to form a flow path in the gap between the filter units 71 in the state of FIG. However, this is different from the filter unit 70.
　以上のフィルタ部７０Ａの構成であっても、図５に示すように、清掃モードにおいては、フィルタ７３が筐体１０の内部に向かって回動してフィルタユニット７１同士の隙間に流路が形成される。この流路にそって空気Ｗ２が流れることで、フィルタ７３に付着している粉塵と筐体１０内部の粉塵を筐体１０外部に排出することができる。 Even in the above-described configuration of the filter unit 70A, as shown in FIG. 5, in the cleaning mode, the filter 73 rotates toward the inside of the housing 10 to form a flow path in the gap between the filter units 71. Is done. When the air W2 flows along this flow path, dust adhering to the filter 73 and dust inside the housing 10 can be discharged to the outside of the housing 10.
　図６は、図１に示すプロジェクタ１００の第一の変形例であるプロジェクタ１００Ａの概略構成を示す模式図である。プロジェクタ１００Ａは、加振部７４が追加された点を除いてはプロジェクタ１００と同じ構成である。 FIG. 6 is a schematic diagram showing a schematic configuration of a projector 100A which is a first modification of the projector 100 shown in FIG. Projector 100A has the same configuration as projector 100 except that a vibration unit 74 is added.
　加振部７４は、フィルタ部７０を振動させるためのデバイスであり、例えば超音波振動子とこれを駆動する駆動素子等を含んで構成されている。加振部７４はシステム制御部５によって制御される。プロジェクタ１００Ａのシステム制御部５は、吸気ファン７を逆回転させている状態においては、加振部７４を作動させて、フィルタ部７０を振動させる。プロジェクタ１００Ａのシステム制御部５は、吸気ファン７を正回転又は停止させている状態においては、加振部７４を停止する。 The vibrating section 74 is a device for vibrating the filter section 70, and includes, for example, an ultrasonic vibrator and a drive element for driving the vibrator. The vibration unit 74 is controlled by the system control unit 5. When the intake fan 7 is rotating in the reverse direction, the system control unit 5 of the projector 100A operates the vibration unit 74 to vibrate the filter unit 70. The system control unit 5 of the projector 100A stops the vibration unit 74 when the intake fan 7 is rotating forward or stopped.
　プロジェクタ１００Ａによれば、吸気ファン７が逆回転されている状態において、フィルタ部７０が振動するため、筐体１０内部の粉塵とフィルタ７３に付着した粉塵の除去効果を高めることができる。 According to the projector 100A, since the filter 70 vibrates when the intake fan 7 is rotated in the reverse direction, the effect of removing dust inside the housing 10 and dust adhering to the filter 73 can be enhanced.
　図７は、図１に示した吸気ファン７が正回転している状態における図１の範囲Ａの変形例を示す断面模式図である。図８は、図１に示した吸気ファン７が逆回転している状態における図１の範囲Ａの変形例を示す断面模式図である。図７は、フィルタ部７０がフィルタ部７０Ｂに変更された点を除いては図２と同じである。図８は、フィルタ部７０がフィルタ部７０Ｂに変更された点を除いては図３と同じである。 FIG. 7 is a schematic cross-sectional view showing a modification of the range A in FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating forward. FIG. 8 is a schematic cross-sectional view showing a modification of the range A of FIG. 1 in a state where the intake fan 7 shown in FIG. 1 is rotating in the reverse direction. FIG. 7 is the same as FIG. 2 except that the filter unit 70 is changed to a filter unit 70B. FIG. 8 is the same as FIG. 3 except that the filter unit 70 is changed to a filter unit 70B.
　図７及び図８に示したフィルタ部７０Ｂは、フィルタユニット７１における回転軸７２の位置がフィルタ部７０とは異なっている。フィルタ部７０Ｂにおけるフィルタユニット７１の回転軸７２は、フィルタ７３の中央部に位置している。このようなフィルタ部７０Ｂであっても、清掃モード時において、筐体１０内部に存在する粉塵の除去が可能である。 フ ィ ル タ The filter unit 70B shown in FIGS. 7 and 8 differs from the filter unit 70 in the position of the rotation shaft 72 in the filter unit 71. The rotation shaft 72 of the filter unit 71 in the filter section 70B is located at the center of the filter 73. Even in such a filter unit 70B, dust present in the housing 10 can be removed in the cleaning mode.
　図９は、図１に示すプロジェクタ１００の第二の変形例であるプロジェクタ１００Ｂの概略構成を示す模式図である。プロジェクタ１００Ｂは、排気ファン８が排気ファン８Ａに変更された点と、吸気口１０Ａに設けられたのと同じ構造のフィルタ部７０が排気口１０Ｂにも設けられた点と、を除いては、プロジェクタ１００と同じ構成である。 FIG. 9 is a schematic diagram showing a schematic configuration of a projector 100B which is a second modification of the projector 100 shown in FIG. The projector 100B is different from the projector 100B in that the exhaust fan 8 is changed to the exhaust fan 8A, and that the filter unit 70 having the same structure as that provided in the intake port 10A is also provided in the exhaust port 10B. It has the same configuration as projector 100.
　排気ファン８Ａは、排気口１０Ｂに対向する位置に設けられている。排気ファン８Ａは、その回転方向を正逆切替可能となっている。排気ファン８Ａは、一方向に回転（正回転）されている状態においては、排気口１０Ｂから筐体１０内に空気を取り込み、この一方向の逆方向に回転（逆回転）されている状態においては、筐体１０内の空気を排気口１０Ｂから排出する。 The exhaust fan 8A is provided at a position facing the exhaust port 10B. The exhaust fan 8A can switch its rotation direction between forward and reverse. When the exhaust fan 8A is rotating in one direction (forward rotation), it takes in air from the exhaust port 10B into the housing 10 and rotates in the opposite direction to this one direction (reverse rotation). Discharges the air in the housing 10 from the exhaust port 10B.
　プロジェクタ１００Ｂにおいて、吸気口１０Ａは第一開口部を構成し、排気口１０Ｂは第二開口部を構成する。吸気口１０Ａに設けられたフィルタ部７０は第一のフィルタ部を構成し、排気口１０Ｂに設けられたフィルタ部７０は第二のフィルタ部を構成する。 In the projector 100B, the inlet 10A forms a first opening, and the outlet 10B forms a second opening. The filter section 70 provided at the intake port 10A constitutes a first filter section, and the filter section 70 provided at the exhaust port 10B constitutes a second filter section.
　プロジェクタ１００Ｂのシステム制御部５は、投影モード時においては排気ファン８Ａを逆回転させ、清掃モード時においては排気ファン８Ａを正回転させる。 The system control unit 5 of the projector 100B rotates the exhaust fan 8A in the reverse mode in the projection mode, and rotates the exhaust fan 8A in the normal mode in the cleaning mode.
　図１０は、図９に示した排気ファン８Ａが逆回転している状態における図９の範囲Ｂの断面模式図である。図１１は、図９に示した排気ファン８Ａが正回転している状態における図９の範囲Ｂの断面模式図である。 FIG. 10 is a schematic cross-sectional view of a range B in FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating in the reverse direction. FIG. 11 is a schematic cross-sectional view of a range B of FIG. 9 in a state where the exhaust fan 8A shown in FIG. 9 is rotating forward.
　プロジェクタ１００Ｂは、投影モードにおいては、吸気ファン７が正回転し、吸気口１０Ａに設けられたフィルタ部７０を介して筐体１０内に空気Ｗ１を取り入れ、この空気Ｗ１によって被冷却部材を冷却する。また、投影モードにおいては、排気ファン８Ａが逆回転し、排気口１０Ｂに設けられたフィルタ部７０には、排気ファン８Ａからの風圧によって、フィルタユニット７１間に流路が形成される。このため、図１０に示すように、吸気ファン７の正回転によって筐体１０に取り入れられた空気Ｗ１は、排気口１０Ｂに形成された流路と、排気口１０Ｂに設けられたフィルタ７３との両方を通過して筐体１０の外部へと排出される。 In the projector 100B, in the projection mode, the intake fan 7 rotates forward, takes in the air W1 into the housing 10 through the filter unit 70 provided in the intake port 10A, and cools the member to be cooled by the air W1. . In the projection mode, the exhaust fan 8A rotates in the reverse direction, and a flow path is formed between the filter units 71 in the filter unit 70 provided at the exhaust port 10B by the wind pressure from the exhaust fan 8A. Therefore, as shown in FIG. 10, the air W1 introduced into the housing 10 by the normal rotation of the intake fan 7 is supplied to the air passage W formed in the exhaust port 10B and the filter 73 provided in the exhaust port 10B. It passes through both and is discharged to the outside of the housing 10.
　プロジェクタ１００Ｂは、清掃モードにおいては、排気ファン８Ａが正回転し、排気口１０Ｂに設けられたフィルタ部７０を介して筐体１０内に空気Ｗ２を取り入れる。また、清掃モードにおいては、吸気ファン７が逆回転し、吸気口１０Ａに設けられたフィルタ部７０には、吸気ファン７からの風圧によって、フィルタユニット７１間に流路が形成される。このため、排気ファン８Ａの正回転によって筐体１０に取り入れられた空気Ｗ２は、図３に示すように、吸気口１０Ａに形成された流路と、吸気口１０Ａに設けられたフィルタ７３との両方を通過して筐体１０の外部へと排出される。 In the projector 100B, in the cleaning mode, the exhaust fan 8A rotates forward, and the air W2 is taken into the housing 10 via the filter 70 provided in the exhaust port 10B. In the cleaning mode, the intake fan 7 rotates in the reverse direction, and a flow path is formed between the filter units 71 in the filter section 70 provided at the intake port 10A by the wind pressure from the intake fan 7. For this reason, as shown in FIG. 3, the air W2 introduced into the housing 10 by the forward rotation of the exhaust fan 8A passes through the flow path formed in the intake port 10A and the filter 73 provided in the intake port 10A. It passes through both and is discharged to the outside of the housing 10.
　このように、排気口１０Ｂにもフィルタ部７０を設けることで、吸気ファン７を正回転させている状態（排気ファン８Ａを逆回転させている状態）においては、排気口１０Ｂがフィルタ部７０によって部分的に開放されるため、筐体１０内の空気の排出をスムーズに行うことができると共に、排気口１０Ｂに設けられたフィルタ部７０のフィルタ７３に付着した粉塵を外部に吹き飛ばして除去することができる。また、吸気ファン７を逆回転させている状態（排気ファン８Ａを正回転させている状態）においては、排気口１０Ｂはフィルタ部７０によって閉塞されるため、排気口１０Ｂから筐体１０内への粉塵の侵入を防ぐことができる。 Thus, by providing the filter portion 70 also at the exhaust port 10B, in a state where the intake fan 7 is rotating forward (a state where the exhaust fan 8A is rotating reversely), the exhaust port 10B is Since the air is partially opened, the air in the housing 10 can be smoothly discharged, and the dust attached to the filter 73 of the filter unit 70 provided at the exhaust port 10B is blown off and removed. Can be. In a state in which the intake fan 7 is rotated in the reverse direction (a state in which the exhaust fan 8A is rotated in the forward direction), the exhaust port 10B is closed by the filter 70, so that the exhaust port 10B is Dust intrusion can be prevented.
　なお、プロジェクタ１００Ｂにおいても、排気口１０Ｂに設けられたフィルタ部７０を振動させる加振部を設けることが好ましい。プロジェクタ１００Ｂのシステム制御部５は、排気ファン８Ａを逆回転させている図１０に示す状態において、この加振部を作動させてフィルタ部７０を振動させればよい。これにより、排気口１０Ｂに設けられたフィルタ部７０に付着した粉塵を効果的に除去することができる。 Note that, also in the projector 100B, it is preferable to provide a vibrating unit that vibrates the filter unit 70 provided in the exhaust port 10B. In the state shown in FIG. 10 in which the exhaust fan 8A is rotated in the reverse direction, the system control unit 5 of the projector 100B may operate the vibration unit to vibrate the filter unit 70. Thereby, dust adhering to the filter unit 70 provided in the exhaust port 10B can be effectively removed.
　ここまで説明してきたプロジェクタ１００、１００Ａ、１００Ｂは、方向Ｘ１及び方向Ｙ１と垂直な方向（例えば図２中の紙面手前から奥に向かう方向）が鉛直方向となる姿勢にて使用されるものとしてもよい。このような使用形態であっても、清掃モードにおいて、筐体１０内部に存在する粉塵の除去が可能である。 The projectors 100, 100A, and 100B described so far may be used in a posture in which a direction perpendicular to the direction X1 and the direction Y1 (for example, a direction from the front to the back in FIG. 2) is a vertical direction. Good. Even in such a usage mode, it is possible to remove dust present inside the housing 10 in the cleaning mode.
　以上説明してきたように、本明細書には以下の事項が開示されている。 As described above, the following items are disclosed in this specification.
（１）
　開口部を有する筐体と、
　正回転されている状態においては上記開口部から上記筐体内に空気を取り込み、逆回転されている状態においては上記筐体内の空気を上記開口部から排出するファンと、
　上記ファンによって上記筐体内に取り込まれる空気に含まれる粉塵を捕捉するためのフィルタ部と、を備え、
　上記フィルタ部は、上記ファンの逆回転による空気の排出方向と垂直な方向に延びる回転軸と、上記回転軸を中心に回動自在に構成された粉塵を捕捉するためのフィルタと、を有する、上記排出方向及び上記回転軸と垂直な方向に並ぶ複数のフィルタユニットによって構成され、
　上記複数のフィルタユニットは、上記ファンが正回転されている状態においては、隣接する上記フィルタユニット同士が接触して上記開口部を閉塞し、上記ファンが逆回転されている状態においては、隣接する上記フィルタユニット同士が離間して、隣接する上記フィルタユニット同士の隙間に、上記筐体内の空気が排出される流路を形成する投影装置。 (1)
A housing having an opening;
A fan that takes in air into the housing from the opening in the state of normal rotation, and discharges air in the housing from the opening in the state of reverse rotation,
A filter for capturing dust contained in air taken into the housing by the fan,
The filter unit has a rotating shaft extending in a direction perpendicular to a direction in which air is discharged by reverse rotation of the fan, and a filter configured to capture dust that is rotatable around the rotating shaft. It is constituted by a plurality of filter units arranged in a direction perpendicular to the discharge direction and the rotation axis,
The plurality of filter units are adjacent to each other in a state where the fan is rotating forward, the adjacent filter units contact each other to close the opening, and in a state where the fan is rotating reversely. A projection device, wherein the filter units are separated from each other, and a flow path through which air in the housing is discharged is formed in a gap between the adjacent filter units.
（２）
　（１）記載の投影装置であって、
　上記複数のフィルタユニットの各々は、上記ファンが逆回転されている状態においては、上記ファンが正回転されている状態における位置から上記排出方向に向かって回動して上記流路を形成する投影装置。 (2)
(1) The projection device according to (1),
Each of the plurality of filter units, when the fan is rotated in the reverse direction, rotates from the position in the state where the fan is normally rotated in the discharge direction to form the flow path. apparatus.
（３）
　（１）又は（２）記載の投影装置であって、
　上記ファンが逆回転されている状態において、上記複数のフィルタユニットの各々の上記フィルタは、上記排出方向に対して傾斜した状態となっている投影装置。 (3)
The projection device according to (1) or (2),
The projection apparatus, wherein the filters of the plurality of filter units are inclined with respect to the discharge direction when the fan is rotated in the reverse direction.
（４）
　（１）から（３）のいずれか１つに記載の投影装置であって、
　上記複数のフィルタユニットの各々を駆動する駆動部を備え、
　上記駆動部は、上記ファンが正回転されている状態においては、隣接する上記フィルタユニット同士を接触させ、上記ファンが逆回転されている状態においては、隣接する上記フィルタユニット同士を離間させる投影装置。 (4)
The projection device according to any one of (1) to (3),
A driving unit that drives each of the plurality of filter units;
A projection device configured to contact the adjacent filter units when the fan is rotating forward, and to separate the adjacent filter units when the fan is rotating reversely; .
（５）
　（１）から（４）のいずれか１つに記載の投影装置であって、
　上記回転軸は、鉛直方向及び上記排出方向と垂直な方向に延びる軸である投影装置。 (5)
The projection device according to any one of (1) to (4),
The projection device, wherein the rotation axis is an axis extending in a vertical direction and a direction perpendicular to the discharge direction.
（６）
　（１）から（５）のいずれか１つに記載の投影装置であって、
　上記ファンが逆回転されている状態において上記フィルタ部を振動させる加振部を更に備える投影装置。 (6)
The projection device according to any one of (1) to (5),
A projection apparatus further comprising a vibrating unit that vibrates the filter unit in a state where the fan is rotated in the reverse direction.
（７）
　（１）から（６）のいずれか１つに記載の投影装置であって、
　上記開口部は、第一開口部と第二開口部を含み、
　上記ファンは、画像を投影する投影モードにおいて正回転され、粉塵の除去を行うための清掃モードにおいて逆回転される吸気ファンであって、正回転されている状態においては上記第一開口部から上記筐体内に空気を取り込み、逆回転されている状態においては上記筐体内の空気を上記第一開口部から排出する吸気ファンと、上記投影モードにおいて逆回転され、上記清掃モードにおいて正回転される排気ファンであって、逆回転されている状態においては上記筐体内の空気を上記第二開口部から排出し、正回転されている状態においては上記第二開口部から上記筐体内に空気を取り込む排気ファンと、を含み、
　上記吸気ファンが正回転している状態にて上記第一開口部から上記筐体内に取り込まれる空気に含まれる粉塵を捕捉するための第一の上記フィルタ部と、上記排気ファンが正回転している状態にて上記第二開口部から上記筐体内に取り込まれる空気に含まれる粉塵を捕捉するための第二の上記フィルタ部と、を備える投影装置。 (7)
The projection device according to any one of (1) to (6),
The opening includes a first opening and a second opening,
The fan is an intake fan that is normally rotated in a projection mode for projecting an image, and is reversely rotated in a cleaning mode for removing dust, and the fan is rotated from the first opening in a normally rotated state. An intake fan that takes in air into the housing and discharges the air in the housing from the first opening when the air is rotated in the reverse direction, and an exhaust fan that is rotated in the reverse direction in the projection mode and rotated forward in the cleaning mode A fan that exhausts air from the housing through the second opening when the fan is rotated in the reverse direction, and takes air into the housing through the second opening when the fan is rotated in the normal direction. Including a fan,
The first filter section for capturing dust contained in air taken into the housing from the first opening in a state where the intake fan is rotating forward, and the exhaust fan is rotating forward. And a second filter section for capturing dust contained in air taken into the housing from the second opening in a state where the filter is in a state of being located.
（８）
　開口部を有する筐体と、正回転されている状態においては上記開口部から上記筐体内に空気を取り込み、逆回転されている状態においては上記筐体内の空気を上記開口部から排出するファンと、上記ファンによって上記筐体内に取り込まれる空気に含まれる粉塵を捕捉するためのフィルタ部と、を有する投影装置の制御方法であって、
　上記フィルタ部は、上記ファンの逆回転による空気の排出方向と垂直な方向に延びる回転軸と、上記回転軸を中心に回動自在に構成された粉塵を捕捉するためのフィルタと、を有する、上記排出方向及び上記回転軸と垂直な方向に並ぶ複数のフィルタユニットによって構成され、
　上記ファンが正回転されている状態においては、隣接する上記フィルタユニット同士を接触させて上記複数のフィルタユニットにより上記開口部を閉塞し、上記ファンが逆回転されている状態においては、隣接する上記フィルタユニット同士を離間させて、隣接する上記フィルタユニット同士の隙間に、上記筐体内の空気が排出される流路を形成する投影装置の制御方法。 (8)
A housing having an opening, and a fan for taking air into the housing from the opening in a state of normal rotation and discharging air in the housing from the opening in a state of reverse rotation. A filter unit for capturing dust contained in air taken into the housing by the fan, and
The filter unit has a rotation shaft extending in a direction perpendicular to a direction in which air is discharged by reverse rotation of the fan, and a filter configured to capture dust that is rotatable around the rotation shaft. It is constituted by a plurality of filter units arranged in a direction perpendicular to the discharge direction and the rotation axis,
In the state where the fan is rotating forward, the openings are closed by the plurality of filter units by contacting the adjacent filter units, and in the state where the fan is rotating reversely, the adjacent filter units are closed. A control method for a projection apparatus, wherein a filter unit is separated from each other, and a flow path through which air in the housing is discharged is formed in a gap between the adjacent filter units.
（９）
　（８）記載の投影装置の制御方法であって、
　上記複数のフィルタユニットの各々を、上記ファンが逆回転されている状態においては、上記ファンが正回転されている状態における位置から上記排出方向に向かって回動させて上記流路を形成する投影装置の制御方法。 (9)
(8) The method for controlling a projection device according to (8),
In the state where the fan is rotated in the reverse direction, each of the plurality of filter units is rotated toward the discharge direction from the position where the fan is rotated in the normal direction, thereby forming the flow path. How to control the device.
（１０）
　（８）又は（９）記載の投影装置の制御方法であって、
　上記ファンが逆回転されている状態においては、上記複数のフィルタユニットの各々の上記フィルタを、上記排出方向に対して傾斜した状態に制御する投影装置の制御方法。 (10)
It is a control method of the projection device as described in (8) or (9), Comprising:
A control method for a projection device, wherein when the fan is rotated in the reverse direction, the filters of the plurality of filter units are controlled to be inclined with respect to the discharge direction.
（１１）
　（８）から（１０）のいずれか１つに記載の投影装置の制御方法であって、
　上記ファンが逆回転されている状態において上記フィルタ部を振動させるステップを更に備える投影装置の制御方法。 (11)
It is a control method of the projection device as described in any one of (8) to (10), Comprising:
A control method for a projection device, further comprising: vibrating the filter unit in a state where the fan is rotated in the reverse direction.
　以上、図面を参照しながら各種の実施の形態について説明したが、本発明はかかる例に限定されないことは言うまでもない。当業者であれば、特許請求の範囲に記載された範疇内において、各種の変更例又は修正例に想到し得ることは明らかであり、それらについても当然に本発明の技術的範囲に属するものと了解される。また、発明の趣旨を逸脱しない範囲において、上記実施の形態における各構成要素を任意に組み合わせてもよい。 Although various embodiments have been described with reference to the drawings, it is needless to say that the present invention is not limited to such examples. It is clear that those skilled in the art can conceive various changes or modifications within the scope of the claims, and these naturally belong to the technical scope of the present invention. I understand. Further, each component in the above embodiment may be arbitrarily combined without departing from the spirit of the invention.
　なお、本出願は、２０１８年８月３１日出願の日本特許出願（特願２０１８－１６３２１２）に基づくものであり、その内容は本出願の中に参照として援用される。 This application is based on a Japanese patent application filed on August 31, 2018 (Japanese Patent Application No. 2018-163212), the contents of which are incorporated herein by reference.
　本発明は、液晶プロジェクタ等に適用して利便性が高く、有効である。 The present invention is highly convenient and effective when applied to a liquid crystal projector or the like.
１００、１００Ａ、１００Ｂ　プロジェクタ
２　光源ユニット
２１　光源
２２　カラーホイール
２３　照明光学系
３　光変調素子
４　投影光学系
５　システム制御部
７　吸気ファン
７０、７０Ａ、７０Ｂ　フィルタ部
７１　フィルタユニット
７２　回転軸
７３　フィルタ
７４　加振部
θ　角度
Ｗ１、Ｗ２　空気
８、８Ａ　排気ファン
１０　筐体
１０Ａ　吸気口
１０Ｂ　排気口
Ａ、Ｂ　範囲
  100, 100A, 100B Projector 2 Light source unit 21 Light source 22 Color wheel 23 Illumination optical system 3 Light modulation element 4 Projection optical system 5 System control unit 7 Intake fans 70, 70A, 70B Filter unit 71 Filter unit 72 Rotation axis 73 Filter 74 Shaking part θ Angle W1, W2 Air 8, 8A Exhaust fan 10 Housing 10A Inlet 10B Exhaust A, B Range

Claims (11)

  1. 　開口部を有する筐体と、
    　正回転されている状態においては前記開口部から前記筐体内に空気を取り込み、逆回転されている状態においては前記筐体内の空気を前記開口部から排出するファンと、
    　前記ファンによって前記筐体内に取り込まれる空気に含まれる粉塵を捕捉するためのフィルタ部と、を備え、
    　前記フィルタ部は、前記ファンの逆回転による空気の排出方向と垂直な方向に延びる回転軸と、前記回転軸を中心に回動自在に構成された粉塵を捕捉するためのフィルタと、を有する、前記排出方向及び前記回転軸と垂直な方向に並ぶ複数のフィルタユニットによって構成され、
    　前記複数のフィルタユニットは、前記ファンが正回転されている状態においては、隣接する前記フィルタユニット同士が接触して前記開口部を閉塞し、前記ファンが逆回転されている状態においては、隣接する前記フィルタユニット同士が離間して、隣接する前記フィルタユニット同士の隙間に、前記筐体内の空気が排出される流路を形成する投影装置。     A housing having an opening;
    A fan that takes in air into the housing from the opening in the state of normal rotation, and discharges air in the housing from the opening in the state of reverse rotation,
    A filter for capturing dust contained in air taken into the housing by the fan,
    The filter unit includes a rotation shaft extending in a direction perpendicular to a direction in which air is discharged by reverse rotation of the fan, and a filter configured to capture dust that is rotatable around the rotation shaft. It is constituted by a plurality of filter units arranged in a direction perpendicular to the discharge direction and the rotation axis,
    The plurality of filter units are adjacent to each other in a state where the fan is rotating forward, the adjacent filter units contact each other to close the opening, and in a state where the fan is rotating reversely. A projection apparatus, wherein the filter units are separated from each other, and a flow path through which air in the housing is discharged is formed in a gap between the adjacent filter units.
  2. 　請求項１記載の投影装置であって、
    　前記複数のフィルタユニットの各々は、前記ファンが逆回転されている状態においては、前記ファンが正回転されている状態における位置から前記排出方向に向かって回動して前記流路を形成する投影装置。     The projection device according to claim 1,
    Each of the plurality of filter units is configured such that, when the fan is rotated in the reverse direction, the fan rotates in the discharge direction from the position where the fan is rotated in the forward direction to form the flow path. apparatus.
  3. 　請求項１又は２記載の投影装置であって、
    　前記ファンが逆回転されている状態において、前記複数のフィルタユニットの各々の前記フィルタは、前記排出方向に対して傾斜した状態となっている投影装置。     The projection device according to claim 1 or 2,
    The projection device, wherein the filters of each of the plurality of filter units are inclined with respect to the discharge direction when the fan is rotated in the reverse direction.
  4. 　請求項１から３のいずれか１項記載の投影装置であって、
    　前記複数のフィルタユニットの各々を駆動する駆動部を備え、
    　前記駆動部は、前記ファンが正回転されている状態においては、隣接する前記フィルタユニット同士を接触させ、前記ファンが逆回転されている状態においては、隣接する前記フィルタユニット同士を離間させる投影装置。     The projection device according to claim 1, wherein:
    A driving unit that drives each of the plurality of filter units,
    A projection device configured to contact the adjacent filter units when the fan is rotating forward, and to separate the adjacent filter units when the fan is rotating reversely; .
  5. 　請求項１から４のいずれか１項記載の投影装置であって、
    　前記回転軸は、鉛直方向及び前記排出方向と垂直な方向に延びる軸である投影装置。     The projection device according to any one of claims 1 to 4, wherein
    The projection device, wherein the rotation axis is an axis extending in a vertical direction and a direction perpendicular to the discharge direction.
  6. 　請求項１から５のいずれか１項記載の投影装置であって、
    　前記ファンが逆回転されている状態において前記フィルタ部を振動させる加振部を更に備える投影装置。     The projection device according to claim 1, wherein:
    A projection apparatus further comprising a vibrating unit that vibrates the filter unit in a state where the fan is rotated in the reverse direction.
  7. 　請求項１から６のいずれか１項記載の投影装置であって、
    　前記開口部は、第一開口部と第二開口部を含み、
    　前記ファンは、画像を投影する投影モードにおいて正回転され、粉塵の除去を行うための清掃モードにおいて逆回転される吸気ファンであって、正回転されている状態においては前記第一開口部から前記筐体内に空気を取り込み、逆回転されている状態においては前記筐体内の空気を前記第一開口部から排出する吸気ファンと、前記投影モードにおいて逆回転され、前記清掃モードにおいて正回転される排気ファンであって、逆回転されている状態においては前記筐体内の空気を前記第二開口部から排出し、正回転されている状態においては前記第二開口部から前記筐体内に空気を取り込む排気ファンと、を含み、
    　前記吸気ファンが正回転している状態にて前記第一開口部から前記筐体内に取り込まれる空気に含まれる粉塵を捕捉するための第一の前記フィルタ部と、前記排気ファンが正回転している状態にて前記第二開口部から前記筐体内に取り込まれる空気に含まれる粉塵を捕捉するための第二の前記フィルタ部と、を備える投影装置。     The projection device according to claim 1, wherein:
    The opening includes a first opening and a second opening,
    The fan is an intake fan that is normally rotated in a projection mode for projecting an image, and is reversely rotated in a cleaning mode for removing dust, and the fan is rotated from the first opening in a normally rotated state. An intake fan that takes in air into the housing and discharges the air in the housing from the first opening when the air is rotated in the reverse direction, and exhaust air that is rotated in the projection mode in the reverse direction and is rotated in the cleaning mode in the normal direction. A fan that exhausts the air in the housing from the second opening when the fan is rotated in the reverse direction, and takes in the air from the second opening into the housing when the fan is rotated in the normal direction. Including a fan,
    The first filter section for capturing dust contained in air taken into the housing from the first opening in a state where the intake fan is rotating forward, and the exhaust fan is rotating forward. A second filter section for capturing dust contained in air taken into the housing from the second opening in a state where the filter is in a state of being located.
  8. 　開口部を有する筐体と、正回転されている状態においては前記開口部から前記筐体内に空気を取り込み、逆回転されている状態においては前記筐体内の空気を前記開口部から排出するファンと、前記ファンによって前記筐体内に取り込まれる空気に含まれる粉塵を捕捉するためのフィルタ部と、を有する投影装置の制御方法であって、
    　前記フィルタ部は、前記ファンの逆回転による空気の排出方向と垂直な方向に延びる回転軸と、前記回転軸を中心に回動自在に構成された粉塵を捕捉するためのフィルタと、を有する、前記排出方向及び前記回転軸と垂直な方向に並ぶ複数のフィルタユニットによって構成され、
    　前記ファンが正回転されている状態においては、隣接する前記フィルタユニット同士を接触させて前記複数のフィルタユニットにより前記開口部を閉塞し、前記ファンが逆回転されている状態においては、隣接する前記フィルタユニット同士を離間させて、隣接する前記フィルタユニット同士の隙間に、前記筐体内の空気が排出される流路を形成する投影装置の制御方法。     A housing having an opening, and a fan that takes in air into the housing from the opening during normal rotation and discharges air from the housing through the opening during reverse rotation. A filter unit for capturing dust contained in air taken into the housing by the fan, and
    The filter unit includes a rotation shaft extending in a direction perpendicular to a direction in which air is discharged by reverse rotation of the fan, and a filter configured to capture dust that is rotatable around the rotation shaft. It is constituted by a plurality of filter units arranged in a direction perpendicular to the discharge direction and the rotation axis,
    In the state where the fan is rotating forward, the openings are closed by the plurality of filter units by contacting the adjacent filter units, and in the state where the fan is rotating in the reverse direction, the adjacent filter units are closed. A control method for a projection apparatus, wherein a filter unit is separated from each other, and a flow path through which air in the housing is discharged is formed in a gap between adjacent filter units.
  9. 　請求項８記載の投影装置の制御方法であって、
    　前記複数のフィルタユニットの各々を、前記ファンが逆回転されている状態においては、前記ファンが正回転されている状態における位置から前記排出方向に向かって回動させて前記流路を形成する投影装置の制御方法。     The control method of a projection device according to claim 8, wherein
    In the state where the fan is rotated in the reverse direction, each of the plurality of filter units is rotated in the discharge direction from the position where the fan is rotated in the normal direction to form the flow path. How to control the device.
  10. 　請求項８又は９記載の投影装置の制御方法であって、
    　前記ファンが逆回転されている状態においては、前記複数のフィルタユニットの各々の前記フィルタを、前記排出方向に対して傾斜した状態に制御する投影装置の制御方法。     It is a control method of the projection apparatus of Claim 8 or 9, Comprising:
    A control method for a projection device, wherein the filter of each of the plurality of filter units is controlled to be inclined with respect to the discharge direction when the fan is rotated in the reverse direction.
  11. 　請求項８から１０のいずれか１項記載の投影装置の制御方法であって、
    　前記ファンが逆回転されている状態において前記フィルタ部を振動させるステップを更に備える投影装置の制御方法。     The control method for a projection device according to claim 8, wherein:
    The control method of a projection device, further comprising: vibrating the filter unit in a state where the fan is rotated in the reverse direction.
PCT/JP2019/031880 2018-08-31 2019-08-13 Projection device and control method therefor WO2020045084A1 (en)

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