JP2008203450A - Electronics - Google Patents

Abstract

Provided is an electronic device capable of automatically changing an exhaust direction and improving exhaust efficiency.
A projector includes an exterior housing having an exhaust port and a fan that exhausts air inside the exterior housing to the outside through the exhaust port. The exhaust port 27 is provided with a rectifying plate 291 configured to be able to change the exhaust direction of the air exhausted through the exhaust port 27. Field sensors 28U, 28L, 28F, and 28B that detect the presence or absence of an object around the exhaust port 27 and output it as detection information are attached to the exterior casing 2 respectively. Then, the projector 1 causes the rectifying plate 291 to change the exhaust direction of the air exhausted through the exhaust port 27 based on the object detection information by the field sensors 28U, 28L, 28F, and 28B.
[Selection] Figure 1

Description

  The present invention relates to an electronic device.

  2. Description of the Related Art Conventionally, a projector that modulates light emitted from a light source according to image information to form an optical image and projects the optical image in an enlarged manner is known. Inside the exterior casing of such a projector, heat from the light source and heat from the light emitted from the light source generate heat, so the outside air is sucked from the intake port formed in the exterior casing using a fan. Cooling is achieved by circulating the intake air inside the projector. And the air after cooling is exhausted from the exhaust port provided in the exterior housing | casing of the projector.

At this time, if there is an object in the vicinity of the exhaust port, there is a problem that the exhaust efficiency is lowered, and consequently the cooling efficiency of the projector is lowered. On the other hand, for example, a projector is known in which an exhaust guide for guiding the exhaust of a fan in the front and rear, left and right directions is provided on the bottom surface of the projector, and the exhaust direction can be changed by opening and closing the exhaust guide. (For example, Patent Document 1).
In the projector described in Patent Document 1, since the projector user can open and close the exhaust guide to avoid the object in the vicinity of the exhaust port, the exhaust efficiency is not lowered.

JP 2003-202631 A

  However, the projector described in Patent Document 1 is inconvenient because the projector user must change the exhaust direction by opening and closing the exhaust guide, and further, the exhaust direction is determined by the subjectivity of the projector user. Therefore, there is a problem that sufficient exhaust efficiency may not be obtained. In addition, since the exhaust guide is provided to change the exhaust direction, there is a problem that the outer casing of the projector is enlarged. In addition, the exhaust port is generally located at the optimal position in terms of thermal design, but the position of the exhaust port changes depending on the opening and closing of the exhaust guide, so the conventional thermal design cannot be used as it is and redesigned. There is a problem that must be done.

  An object of the present invention is to provide an electronic device that can automatically change the exhaust direction and improve the exhaust efficiency.

  An electronic apparatus according to the present invention is an electronic apparatus including an exterior housing having an exhaust port and a fan that exhausts air inside the exterior housing to the outside through the exhaust port. Exhaust changing means for changing the exhaust direction of the air exhausted, detecting means for detecting the presence or absence of an object around the exhaust port, and control means for controlling the exhaust changing means and the detecting means. The detection means outputs the presence / absence of an object around the exhaust port as detection information, and the control means causes the exhaust change means to change the exhaust direction based on detection information by the detection means. Features.

  According to such a configuration, the control unit causes the exhaust change unit to change the exhaust direction based on the detection information of the object by the detection unit, so that the electronic device automatically avoids the object near the exhaust port and the exhaust direction. As a result, the exhaust efficiency can be improved. In addition, the electronic device only needs to be provided with an exhaust changing means that can change the exhaust direction of the exhaust port arranged at the optimum position in the thermal design, so that the conventional thermal design can be used as it is, and the exterior There is no problem of increasing the size of the housing.

In the present invention, the exhaust gas changing means has a rectifying surface that rectifies the air exhausted through the exhaust port, and is configured to be rotatable about a direction intersecting the air discharge direction by the fan as a rotation axis. It is preferable to include a rectifying plate and a rectifying plate driving unit that rotates the rotation shaft to change an inclination angle of the rectifying plate with respect to the discharge direction.
According to such a configuration, since the rectifying plate driving unit changes the inclination angle of the rectifying plate by rotating the rotation shaft, the exhaust gas changing means can change the exhaust direction with a simple configuration. .

  In the present invention, the rectifying plate includes a first rectifying plate and a second rectifying plate, and the first rectifying plate and the second rectifying plate rotate with respect to each other when viewed from the discharge direction. It is preferred that the axes intersect.

  According to such a configuration, the rotating shaft of the first rectifying plate and the rotating shaft of the second rectifying plate intersect each other when viewed from the direction of air discharge by the fan. Compared with the case where the exhaust gas changing means is constituted by one rectifying plate, the exhaust direction can be changed in a wider range.

  In the present invention, the exhaust gas changing means is provided in the exhaust port, having a rectifying surface extending so as to intersect with the air discharge direction of the fan, and holding the rectifying plate, and also in the discharge direction. It is preferable that a frame member configured to be rotatable about a rotation axis substantially parallel to the rotation axis and a frame member driving unit that rotates the frame member about the rotation axis.

  According to such a configuration, the frame member driving unit can rotate the flow straightening plate by rotating the frame member around the rotation axis, so that the exhaust change means changes the exhaust direction with a simple configuration. can do.

  In the present invention, the exhaust changing means is provided at the exhaust port, has an opening in the air discharge direction by the fan, and is formed to be extendable and retractable with a hollow air guide member that guides the air, It is preferable to include a connecting member that connects the exterior casing and the air guide member, and a connecting member driving unit that expands and contracts at least a part of the connecting member.

According to such a configuration, the connecting member driving unit can change the opening direction of the air guide member by expanding and contracting at least a part of the connecting member, so that the exhaust changing means changes the exhaust direction. Can do. For example, when the air guide member is formed in a substantially rectangular hollow frame shape, the connecting member is formed in a cylindrical shape with a rectangular cross section, and the side surface of the connecting member is formed in a bellows shape so as to be stretchable In this case, by extending a part of the side surface, it is possible to change the exhaust direction by changing the opening direction of the air guide member.
In addition, when each of the rectifying plates described above is provided in the opening of the air guide member, the exhaust gas changing means can change the opening direction of the air guide member by extending the connecting member. Since the exhaust direction can be further changed, the exhaust direction can be changed in a wider range.

  In the present invention, it is preferable that the exhaust gas changing unit includes a fan angle control unit that changes the direction of the fan to a predetermined angle.

  According to such a configuration, since the fan angle control unit changes the direction of discharge of the air by changing the direction of the fan, the exhaust change unit can change the exhaust direction. Therefore, it is not necessary to provide a new member at the exhaust port or the like, and the configuration of the electronic device can be simplified. In addition, when the exhaust direction is changed by providing each of the rectifying plates described above, the exhaust direction is changed by the air discharged from the fan hitting the rectifying surface of the rectifying plate, which causes wind noise, but the direction of the fan When the exhaust direction is changed by changing the airflow, it is not necessary to provide a rectifying plate or the like, so that wind noise can be reduced and the electronic equipment can be made quieter.

  In the present invention, a plurality of the detection means are provided, the plurality of detection means can detect objects in different spaces, and the control means is configured to detect an object based on the detection information by the plurality of detection means. A detection state recognition unit that recognizes the detection state, a storage unit that stores exhaust direction information associated with the detection state and the exhaust direction, and a detection state of an object recognized by the detection state recognition unit, An exhaust direction selection unit that selects an exhaust direction based on the exhaust direction information stored in the storage unit, and the exhaust change unit that changes the exhaust direction to an exhaust direction selected by the exhaust direction selection unit. It is preferable to provide an exhaust direction control unit for controlling the exhaust gas.

  Here, the object detection state is a state indicating which detection means is detecting the object among the plurality of detection means. For example, when four detection units are provided that can detect objects in the upward, downward, leftward, and rightward spaces toward the exhaust port, the objects in the space of each direction are detected. In addition to the case where the object is detected by one of the detecting means that performs the above, the case where the object is detected by the two detecting means that detect the object in the space in the two directions of the upper direction and the left direction, etc. There is a detection state.

And the exhaust direction information memorize | stored in a memory | storage part associates these detection states and an exhaust direction. For example, a detection state in which an object in an upper space is detected is associated with a detection state in which the object is detected by a detection unit that detects an object in an upper space, and the object is detected by a detection unit that detects an object in a left space. The right exhaust direction is associated with the detected state.
Therefore, according to such a configuration, since the plurality of detection means can detect objects in different spaces, the detection means detects whether there is an object in a predetermined space. Even if it exists, the object around the exhaust port can be sufficiently detected.

In the present invention, the electronic device includes a light source device, a light modulation device that modulates light emitted from the light source device according to image information to form an optical image, and a projection that magnifies and projects the formed optical image. Preferably, the projector includes an optical device.
According to such a configuration, it is possible to receive the same operations and effects as those of the electronic device described above.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[First Embodiment]
[External configuration of the projector]
FIG. 1 is a perspective view showing an external appearance of the projector 1. In FIG. 1, for convenience of explanation, the projection direction of an optical image is a Z axis, and two axes orthogonal to the Z axis are an X axis (horizontal axis) and a Y axis (vertical axis), respectively. The same applies to the following drawings.
The projector 1 as an electronic device modulates a light beam emitted from a light source according to image information to form an optical image, and enlarges and projects the formed optical image on a screen Sc (see FIG. 5). As shown in FIG. 1, the projector 1 includes a substantially rectangular parallelepiped outer casing 2 and a projection lens 3 exposed from the outer casing 2.
The projection lens 3 is configured as a combined lens in which a plurality of lenses are housed in a cylindrical lens barrel, and enlarges and projects an optical image formed according to image information by the projector 1.

The exterior housing 2 is made of synthetic resin and houses the apparatus main body of the projector 1.
As shown in FIG. 1, an operation panel 21 for starting and adjusting the projector 1 extends in the left-right direction on the −Z-axis direction side (rear side) of the projection lens 3 on the upper surface portion of the exterior housing 2. It is provided as follows.
Further, in the upper surface portion of the exterior housing 2, a lid installation recess 22 having a rectangular shape in plan view is formed on the −X axis direction side (left side when viewed from the front) of the operation panel 21, as shown in FIG. A lamp replacement lid 23 having a rectangular plate shape in plan view is attached to the lid installation recess 22 in a detachable manner. And the light source lamp which comprises the light source device mentioned later is comprised so that attachment or detachment is possible by removing this lid | cover 23 for lamp replacement | exchange.
Further, as shown in FIG. 1, a speaker hole 24 for outputting sound to the outside of the projector 1 is formed in the upper surface portion of the exterior housing 2 on the + Z axis direction side of the lid installation recess 22. . Inside the speaker hole 24, a speaker (not shown) for outputting a predetermined sound is disposed.

Further, as shown in FIG. 1, a plurality of holes 25 are formed in the back surface portion of the exterior housing 2, and image signals, audio signals, and the like from external electronic devices are input through the plurality of holes 25. A plurality of connection terminals 26 are exposed to the outside. An interface board (not shown) that processes a signal input from the connection terminal 26 is disposed inside the back surface portion.
Further, in the side surface portion 2A on the −X-axis direction side of the exterior housing 2, an exhaust port 27 that communicates the inside and outside of the exterior housing 2 is formed on the −Z-axis direction side, as shown in FIG. .

Here, FIG. 2 is a perspective view showing the inside of the exhaust port 27.
As shown in FIG. 2, a fan 27 </ b> A that circulates air inside the exterior housing 2 is disposed in the vicinity of the exhaust port 27 inside the exterior housing 2, and flows through the interior of the exterior housing 2. Warmed air, that is, air discharged by the fan 27 </ b> A is exhausted from the exhaust port 27.
The fan 27A is disposed adjacent to a light source lamp constituting a light source device described later. This is because the flow rate of the air circulated by the fan 27A is the fastest in the vicinity of the fan 27A, and the light source lamp has the largest amount of heat generation among the components constituting the projector 1. In this way, the exhaust port 27 and the fan 27A are arranged at optimal positions in terms of thermal design.

As shown in FIG. 1, an upward field sensor 28U, a downward field sensor 28L, a forward field sensor 28F, and a backward field sensor 28B are attached to the side surface portion 2A in which the exhaust port 27 is formed.
The field sensors 28U, 28L, 28F, and 28B as detection means output ultrasonic waves and detect reflected waves from the object, whereby the side portion 2A has an upward (+ Y axis) direction and a downward (−Y axis) direction. The presence or absence of objects in different spaces in the front (+ Z axis) direction and the rear (−Z axis) direction can be detected. In the present embodiment, the field sensors 28U, 28L, 28F, and 28B output an on signal when an object is detected, and output an off signal when no object is detected. Here, the signals output from the field sensors 28U, 28L, 28F, and 28B are detection information in the present invention.

As shown in FIG. 1, the exhaust port 27 has a plurality of rectifying plates 291 arranged in the Y-axis direction and a substantially rectangular shape, and a frame for rotatably holding the plurality of rectifying plates 291. A louver 29 including a member 292 is provided.
Here, FIG. 3 is a view showing a louver 29 provided at the exhaust port 27.
As shown in FIG. 3, each rectifying plate 291 as the first rectifying plate extends in the Z-axis direction so as to intersect with the air discharge direction (−X-axis direction) by the fan 27 </ b> A and exhausts through the exhaust port 27. A rectifying surface for rectifying the generated air. Each rectifying plate 291 includes a rotation shaft 293 (see FIG. 4) at one end on the −X axis direction side, and the rotation shaft 293 is rotatably held by the frame member 292. That is, each rectifying plate 291 can change the inclination angle of the rectifying surface of the rectifying plate 291 with respect to the air discharge direction by the fan 27A by rotating about the rotating shaft 293. And the exhaust direction of the air exhausted through the exhaust port 27 is changed according to the inclination angle of the rectifying surface.

  Further, as shown in FIG. 3, the exhaust port 27 is formed in a substantially rectangular shape with a plurality of rectifying plates 301 arranged opposite to each other in the air discharge direction by the louver 29 and the fan 27A and arranged in the Z-axis direction. A louver 30 including a frame member 302 that rotatably holds the plurality of rectifying plates 301 is provided.

As shown in FIG. 3, each rectifying plate 301 as the second rectifying plate extends in the Y-axis direction so as to intersect with the air discharge direction by the fan 27 </ b> A and rectifies the air exhausted through the exhaust port 27. It has a rectifying surface. Each rectifying plate 301 includes 303 (see FIG. 4) at one end on the −X axis direction side, and the rotating shaft 303 is rotatably held by the frame member 302. That is, each rectifying plate 301 can change the inclination angle of the rectifying surface of the rectifying plate 301 with respect to the air discharge direction by the fan 27 </ b> A by rotating about the rotating shaft 303. And the exhaust direction of the air exhausted through the exhaust port 27 is changed according to the inclination angle of the rectifying surface.
Here, the rotating shaft 293 of each rectifying plate 291 and the rotating shaft 303 of each rectifying plate 301 are respectively in the Z-axis direction and the Y-axis direction, and when viewed from the direction of air discharge by the fan 27A, The rotation axes intersect.

FIG. 4 is a schematic diagram showing a structure for rotating the current plates 291 and 301.
As shown in FIG. 4, linear actuators 291 </ b> A and 301 </ b> A as rectifying plate driving units are connected to the respective rectifying plates 291 and 301 via rod members 291 </ b> B and 301 </ b> B, respectively. The linear actuators 291A and 301A can advance and retract the rod members 291B and 301B in the direction of arrow A under a control signal from a control unit 32 (see FIG. 5) described later. Therefore, the inclination angle of the rectifying surfaces of the rectifying plates 291 and 301 can be changed by moving the rod shafts 293 and 303 by moving the rod members 291B and 301B back and forth with the linear actuators 291A and 301A. Accordingly, the linear actuators 291A and 301A can change the exhaust direction of the air exhausted through the exhaust port 27.

Specifically, the linear actuators 291A and 301A change the direction of each rectifying plate 291 upward or downward in the side surface portion 2A, thereby changing the exhaust direction of the air exhausted through the exhaust port 27. It can be changed upward or downward in the side surface portion 2A, and by changing the direction of each rectifying plate 301 in the front direction or the rear direction in the side surface portion 2A, the air exhausted through the exhaust port 27 can be changed. The exhaust direction can be changed to the front direction or the rear direction in the side surface portion 2A.
That is, the exhaust gas changing means in the present embodiment is configured by the respective rectifying plates 291 and 301 and the linear actuators 291A and 301A.

[Internal configuration of projector]
FIG. 5 is a block diagram illustrating a schematic configuration of the projector 1.
As shown in FIG. 5, the projector 1 is roughly composed of an image projection unit 31 and a control unit 32.
The image projection means 31 forms an optical image based on the image data (image information) and enlarges and projects it on the screen Sc. As shown in FIG. 5, a light source device 311 and a liquid crystal panel 312 as a light modulation device. And a projection optical device 313.

The light source device 311 includes a light source lamp 314 configured by an ultra-high pressure mercury lamp, and the light source lamp 314 emits light toward the liquid crystal panel 312.
The light source lamp 314 is not limited to an ultra-high pressure mercury lamp, but a discharge light source lamp such as a metal halide lamp or a xenon lamp, or various self-light emitting elements such as a light emitting diode, a laser diode, an organic EL element, or a silicon light emitting element. May be.
The liquid crystal panel 312 is a transmissive liquid crystal panel, which changes the arrangement of liquid crystal molecules sealed in a liquid crystal cell (not shown) based on image data, and transmits or blocks light emitted from the light source lamp 314. Thus, an optical image is formed by modulating in accordance with the image data, and this optical image is emitted to the projection optical device 313.
The projection optical device 313 enlarges and projects the optical image emitted from the liquid crystal panel 312 toward the screen Sc.

  Although not shown, the projector 1 includes three liquid crystal panels 312 corresponding to the three colors RGB. The light source device 311 also includes a color light separation optical system that separates light emitted from the light source lamp 314 into three colors of light. Furthermore, the projection optical device 313 includes the projection lens 3 described above, and has a combining optical system that generates an optical image representing a color image by combining three color optical images. As for the configuration of such an optical system, various general projector optical system configurations can be used.

  The control means 32 includes, for example, a CPU (Central Processing Unit) and the like, and controls the entire projector 1 and also controls the linear actuators 291A and 301A and the field sensors 28U, 28L, 28F and 28B. Yes, as shown in FIG. 5, a storage unit 321, a detection state recognition unit 322, an exhaust direction selection unit 323, and an exhaust direction control unit 324 are provided. These components 321 to 324 are connected by a bus (not shown) so that necessary information can be transmitted.

The storage unit 321 stores a program, data, and the like for the control means 32 to execute predetermined processing, and includes a detection state based on object detection information by the field sensors 28U, 28L, 28F, and 28B, and an exhaust port. 27 stores exhaust direction information associated with the exhaust direction of the air exhausted through the air outlet 27.
The exhaust direction information is detected based on the exhaust direction information in which the direction of each rectifying plate 291 is associated with the detection state based on the object detection information by the field sensors 28U and 28L, and the object detection information by the field sensors 28F and 28B. The state includes exhaust direction information in which the direction of each rectifying plate 301 is associated.

Specifically, the exhaust direction information in which the orientation of each rectifying plate 291 is associated with the detection state based on the object detection information by the field sensors 28U and 28L is as follows.
First, when the object is detected by the field sensor 28U and the object is not detected by the field sensor 28L, the direction of each rectifying plate 291 is determined by the exhaust direction of the air exhausted through the exhaust port 27. The side portions 2A are associated so as to be in the downward direction.

Further, when the object is not detected by the field sensor 28U and the object is detected by the field sensor 28L, the direction of each rectifying plate 291 is the exhaust direction of the air exhausted through the exhaust port 27. Are associated with each other in the upward direction in the side surface portion 2A.
Further, when the object is detected by the field sensors 28U and 28L and when the object is not detected by the field sensors 28U and 28L, the direction of each rectifying plate 291 is determined by the direction of the exhaust port 27. The exhaust direction of the air exhausted through is related to the front (-X axis in FIG. 1) direction.

Next, the exhaust direction information in which the direction of each rectifying plate 301 is associated with the detection state based on the object detection information by the field sensors 28F and 28B is as follows.
First, when the object is detected by the field sensor 28F and the object is not detected by the field sensor 28B, the direction of each rectifying plate 301 is determined by the exhaust direction of the air exhausted through the exhaust port 27. The side portions 2A are associated so as to be in the rearward direction.

Further, when the object is not detected by the field sensor 28F and the object is detected by the field sensor 28B, the direction of each rectifying plate 301 is the exhaust direction of the air exhausted through the exhaust port 27. Are related so as to be in the forward direction in the side surface portion 2A.
Further, when the object is detected by the field sensors 28F and 28B and when the object is not detected by the field sensors 28F and 28B, the direction of each rectifying plate 301 is determined by the exhaust port 27. It is related so that the exhaust direction of the air exhausted through the front direction is the front direction.
That is, the exhaust direction information is associated with the detection state based on the detection information of the object by the field sensors 28U, 28L, 28F, and 28B, and the exhaust direction in which exhaust can be performed while avoiding the object near the exhaust port 27. .

The detection state recognition unit 322 acquires an on signal or an off signal output from the field sensors 28U, 28L, 28F, and 28B, that is, detection information, and recognizes the detection state of the object based on the acquired detection information.
The exhaust direction selection unit 323 selects the exhaust direction based on the detection state of the object recognized by the detection state recognition unit 322 and the exhaust direction information stored in the storage unit 321.
The exhaust direction control unit 324 outputs a control signal to the linear actuators 291A and 301A, and changes the exhaust direction of the air exhausted through the exhaust port 27 to the exhaust direction selected by the exhaust direction selection unit 323. That is, the exhaust direction control unit 324 controls the linear actuators 291A and 301A so as to change the exhaust direction of the air exhausted through the exhaust port 27 to the exhaust direction selected by the exhaust direction selection unit 323.

Here, FIG. 6 is a schematic diagram illustrating an example of the exhaust direction changed by the exhaust direction control unit 324.
For example, as shown in FIG. 6 (A), when the detection state recognition unit 322 detects an object only in the forward field sensor 28F (circled in FIG. 6), the exhaust direction control unit 324 The direction of the plate 291 is changed so that the exhaust direction of the air exhausted through the exhaust port 27 becomes the front direction in the side surface portion 2A, and the direction of each rectifying plate 301 is exhausted through the exhaust port 27. The exhaust direction of the air is changed so as to be the rear direction in the side surface portion 2A.
Therefore, the exhaust direction D1 of the air exhausted through the exhaust port 27 is the rear direction in the side surface portion 2A.

For example, as shown in FIG. 6B, when the detection state recognition unit 322 detects an object in the downward field sensor 28L and the backward field sensor 28B (circle in FIG. 6), The exhaust direction control unit 324 changes the direction of each rectifying plate 291 so that the exhaust direction of the air exhausted through the exhaust port 27 is upward in the side surface portion 2A, and the direction of each rectifying plate 301 is changed. The exhaust direction of the air exhausted through the exhaust port 27 is changed to the front direction in the side surface portion 2A.
Therefore, the exhaust direction D2 of the air exhausted through the exhaust port 27 is an intermediate position between the upward direction and the forward direction in the side surface portion 2A.

Further, for example, as shown in FIG. 6C, when the detection state recognition unit 322 detects an object in the downward field sensor 28L, the forward field sensor 28F, and the backward field sensor 28B (see FIG. 6C). 6), the exhaust direction control unit 324 changes the direction of each rectifying plate 291 so that the exhaust direction of the air exhausted through the exhaust port 27 is the upward direction in the side surface portion 2A. The direction of each rectifying plate 301 is changed so that the exhaust direction of the air exhausted through the exhaust port 27 is the front direction in the side surface portion 2A.
Therefore, the exhaust direction D3 of the air exhausted through the exhaust port 27 is the upward direction in the side surface portion 2A.

[Exhaust direction control method]
Next, a method for controlling the exhaust direction of the air exhausted through the exhaust port 27 will be described with reference to FIG. FIG. 7 is a flowchart showing a method for controlling the exhaust direction.
First, when the operation panel 21 is operated by the user of the projector 1 and the projector 1 is activated, the detection state recognition unit 322 acquires and acquires detection information output from the field sensors 28U, 28L, 28F, and 28B. The detection state of the object is recognized based on the detected information (step S1).
At this time, if an object is detected in all the field sensors 28U, 28L, 28F, and 28B, a warning sound is output from a speaker (not shown) disposed inside the speaker hole 24.

When the detection state recognition unit 322 recognizes the detection state of the object, the exhaust direction selection unit 323 detects the detection state of the object recognized by the detection state recognition unit 322 and the exhaust direction information stored in the storage unit 321. Based on the above, the exhaust direction is selected (step S2).
When the exhaust direction selection unit 323 selects the exhaust direction, the exhaust direction control unit 324 outputs a control signal to the linear actuators 291A and 301A, and determines the exhaust direction of the air exhausted through the exhaust port 27 as the exhaust direction. The exhaust direction selected by the selection unit 323 is changed (step S3).

  Through steps S1 to S3 as described above, the projector 1 can automatically change the exhaust direction so as to exhaust the object in the vicinity of the exhaust port, and the air circulated inside the projector 1 is changed. It is exhausted in the exhaust direction.

The projector 1 according to the present embodiment has the following effects.
(1) The exhaust direction control unit 324 causes the linear actuators 291A and 301A to change the exhaust direction of the air exhausted through the exhaust port 27 based on the detection state of the object recognized by the detection state recognition unit 322. Therefore, it is possible to automatically avoid the object in the vicinity of the exhaust port and change the exhaust direction, thereby improving the exhaust efficiency.
(2) Since the projector 1 only needs to include an exhaust gas changing unit that can change the exhaust direction of the exhaust port 27 arranged at an optimum position in the thermal design, the conventional thermal design can be used as it is. There is no problem that the outer casing is enlarged.

(3) Since the linear actuators 291A and 301A change the inclination angle of the rectifying surfaces of the rectifying plates 291 and 301 by rotating the rotating shafts 293 and 303, the exhaust changing means has an exhaust port with a simple configuration. The exhaust direction of the air exhausted through the air outlet 27 can be changed.
(4) The rotational coaxial 293 of each rectifying plate 291 and the rotational coaxial 303 of each rectifying plate 301 intersect each other when viewed from the discharge direction by the fan 27A. Compared with the case where it comprises, the exhaust direction of the air exhausted via the exhaust port 27 can be changed more widely.

[Second Embodiment]
A projector 1A according to a second embodiment of the invention will be described.
In the following description, parts that have already been described are assigned the same reference numerals and description thereof is omitted.
In the projector 1 according to the first embodiment, the exhaust gas changing means is configured by the rectifying plates 291 and 301 and the linear actuators 291A and 301A.
On the other hand, as shown in FIGS. 8 and 9, the projector 1 </ b> A according to the present embodiment includes a louver 33, a connecting member 34, and a linear actuator (not shown) as the exhaust gas changing means. It is different in point.

8 and 9 are schematic views showing the louver 33 and the connecting member 34 provided at the peripheral portion of the exhaust port 27. FIG.
As shown in FIGS. 8 and 9, the louver 33 as a wind guide member is formed in a substantially rectangular shape with a plurality of rectifying plates 331 arranged in the Z-axis direction, and the rectifying plates 331 are connected to the respective rectifying plates. And a frame member 332 that holds the 331 so that the direction of the 331 is the front direction. Therefore, the louver 33 is a hollow member that has an opening in the air discharge direction of the fan 27A and guides the air.
The connecting member 34 is formed in a cylindrical shape having a rectangular cross section, and is configured to be extendable and contractable by forming a side surface in a bellows shape. The connecting member 34 is provided with an opening at one end thereof in contact with the peripheral portion of the exhaust port 27, and a frame member 332 is attached to the opening at the other end to connect the exterior housing 2 and the louver 33. Yes.

To each vertex 332A, 332B, 332C, 332D of the frame member 332, a support rod (not shown) that supports each vertex 332A, 332B, 332C, 332D is connected. Further, each support rod is connected to a linear actuator (not shown) as a connecting member drive unit, and is configured to advance and retreat in the X-axis direction under a control signal from the control means 32.
That is, each linear actuator can project the vertexes 332A, 332B, 332C, 332D of the frame member 332 from the exterior housing 2, and can extend a part of the side surface of the connecting member 34. Thereby, since each linear actuator can change the opening direction of the louver 33, the exhaust direction of the air exhausted through the exhaust port 27 can be changed.

  Specifically, each linear actuator can change the opening direction of the louver 33 downward in the side surface portion 2A by projecting the apexes 332A and 332B from the exterior housing 2. In addition, each linear actuator can change the opening direction of the louver 33 upward in the side surface portion 2A by causing the apexes 332C and 332D to protrude from the exterior housing 2.

Furthermore, each linear actuator can change the opening direction of the louver 33 to the front direction in the side surface portion 2A by causing the apexes 332A and 332C to protrude from the exterior housing 2. In addition, each linear actuator can change the opening direction of the louver 33 to the rear direction in the side surface portion 2A by projecting the apexes 332B and 332D from the exterior housing 2.
8 is a diagram showing a state in which the vertices 332B and 332D are projected from the exterior casing 2, and FIG. 9 is a diagram showing a state in which the vertices 332C and 332D are projected from the exterior casing 2. is there.

Also in this embodiment, the same operations and effects as (1) and (2) of the first embodiment can be obtained.
In this embodiment, each rectifying plate 331 is held by the frame member 332 so that the direction of each rectifying plate 331 is the front direction. However, as in the first embodiment, each rectifying plate 331 is configured to be rotatable. Further, it may be rotated by a current plate driving unit. In this case, the exhaust changing means can change the opening direction of the louver by extending the connecting member 34, and can further change the exhaust direction by the baffle plate, so the exhaust direction can be changed in a wider range. can do.

[Third Embodiment]
A projector 1B according to a third embodiment of the invention will be described.
In the projector 1B according to the present embodiment, as shown in FIG. 10, the exhaust gas changing means includes a plurality of rectifying plates 351, a frame member 352 that holds the plurality of rectifying plates 351, and a linear that rotates the frame member 352. It differs from each said embodiment by the point comprised by the actuator (illustration omitted).

FIG. 10 is a schematic diagram showing the louver 35.
As shown in FIG. 10, the louver 35 includes a plurality of rectifying plates 351 arranged in the Z-axis direction and a frame member 352 that holds the plurality of rectifying plates 351.
The rectifying plate 351 has a rectifying surface that rectifies the air exhausted through the exhaust port 27 and extends in the Y-axis direction so as to intersect the air discharge direction of the fan 27A.
The frame member 352 is provided in the exhaust port 27 and is formed in a cylindrical shape having a rotation axis substantially parallel to the air discharge direction by the fan 27A, and each of the rectifying plates 351 is directed forward. To hold.

  A pinion (not shown) is formed in a portion of the peripheral portion of the frame member 352 that is fitted into the exterior housing 2. The pinion is brought into contact with a rack (not shown) to form a rack and pinion structure. Further, the rack is connected to a linear actuator (not shown) as a frame member driving unit, and is configured to be able to advance and retreat with respect to the pinion under a control signal from the control means 32.

  That is, the linear actuator can rotate the flow straightening plate 351 by rotating the frame member 352 around the rotation axis of the frame member 352 by moving the rack forward and backward. Thereby, the linear actuator can change the exhaust direction of the air exhausted through the exhaust port 27.

In this embodiment as well, the same actions and effects as (1) and (2) of the first embodiment can be obtained, and the following actions and effects can be obtained.
In other words, the linear actuator rotates the flow straightening plate 351 by rotating the frame member 352 around the rotation axis of the frame member 352. Therefore, the exhaust changing means has a simple configuration via the exhaust port 27. The exhaust direction of the exhausted air can be changed.
In the present embodiment, the frame member 352 of the louver 35 is formed in a cylindrical shape, but may be formed in a shape other than this. For example, the frame member of the louver may be formed in a rectangular shape, and the louver may be rotatably connected to the exhaust port by a thrust bearing or the like. In short, a rotation axis substantially parallel to the air discharge direction by the fan 27A is used. What is necessary is just to be comprised by the center so that rotation is possible.

[Fourth Embodiment]
A projector 1C according to a fourth embodiment of the invention will be described.
In the projector 1C according to the present embodiment, as shown in FIG. 11, the fan 27B having the same configuration as the fan 27A described above is attached to the inner portion of the frame member 332 in the second embodiment. Different from the second embodiment.
Here, FIG. 11 is a schematic diagram showing the louver 33 and the fan 27B.
A linear actuator (not shown) as a fan angle control unit can change the posture of the fan 27B by projecting the apexes 332A, 332B, 332C, 332D from the exterior housing 2. Therefore, the linear actuator changes the direction of the air discharge by the fan 27B by changing the direction of the fan 27B to a predetermined angle. Therefore, the direction of the air discharged through the exhaust port 27 can be changed. it can.

In this embodiment as well, the same actions and effects as (1) and (2) of the first embodiment can be obtained, and the following actions and effects can be obtained.
That is, as in the above embodiments, when the exhaust changing means changes the exhaust direction by the rectifying surfaces of the rectifying plates 291, 301, 331, 351, the air discharged by the fan 27A hits the rectifying surface. Since the exhaust direction is changed, wind noise is generated. However, when the exhaust direction is changed by changing the direction of the fan 27B as in the present embodiment, the discharge direction by the fan 27B and the rectifying surface are substantially parallel. Therefore, wind noise can be reduced, and the projector 1C can be silenced.

  In the present embodiment, the fan 27B is attached to the inner portion of the frame member 332 in the second embodiment. On the other hand, for example, without providing a rectifying plate at the exhaust port 27, a mesh-like cover may be provided, and a rotary solenoid or the like may be connected to the fan so that the posture of the fan can be changed. In this case, it is not necessary to provide a new member at the exhaust port 27 or the like, and the configuration of the projector 1 can be simplified. In short, it is only necessary that the exhaust direction can be changed by changing the attitude of the fan.

[Modification of Embodiment]
It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
Each exhaust gas changing means in each of the above embodiments is an exemplification, and the present invention is not limited to this. For example, in the third embodiment, the attitude of the fan may be changed by connecting a rotary solenoid or the like to the fan, and the combination of the exhaust gas changing means in each of the embodiments is arbitrary. Furthermore, other exhaust changing means may be employed. In short, the exhaust changing means only needs to be configured to be able to change the exhaust direction of the air exhausted through the exhaust port.

In each of the above-described embodiments, the field sensors 28U, 28L, 28F, and 28B are employed as the detection means. However, for example, an infrared proximity sensor may be employed, and in short, a sensor that can detect the presence or absence of an object. If it is. Furthermore, the presence or absence of an object may be detected based on an image captured by a CCD (Charge Coupled Device) camera or the like.
In each of the above-described embodiments, the field sensors 28U, 28L, 28F, and 28B are provided at four locations on the side surface portion 2A of the exterior housing 2 in the upward direction, the downward direction, the forward direction, and the backward direction. The number may be less than this, such as being provided only at two locations in the rear direction, or may be greater than this. Furthermore, it may be provided in a direction other than this, in other words, it is sufficient if objects in different spaces can be detected.

In each of the above-described embodiments, the exhaust direction information is the detection state based on the detection information of the object by the field sensors 28U, 28L, 28F, and 28B, and the exhaust direction that can exhaust the object in the vicinity of the exhaust port 27, respectively. Although associated with each other, an exhaust direction different from that in each of the above embodiments may be associated. In short, the object detection state and the exhaust direction of the air exhausted through the exhaust port 27 need only be associated with each other.
In each of the embodiments, the exhaust direction selection unit 323 selects the exhaust direction based on the detection state of the object recognized by the detection state recognition unit 322 and the exhaust direction information stored in the storage unit 321. The exhaust direction may be selected by other methods. For example, the exhaust direction may be selected by calculation based on the detection state of the object recognized by the detection state recognition unit 322. In short, the exhaust direction of the air exhausted through the exhaust port 27 is determined based on the detection state of the object. The selection may be made based on

In each of the above embodiments, the projector is exemplified as the electronic device. However, the projector may be a television receiver or the like. In short, a fan that exhausts the air that has circulated inside, and the air that is exhausted by the fan to the outside. What is necessary is just an electronic device provided with the exhaust port which exhausts.
In each of the above embodiments, the transmissive liquid crystal panel 312 is employed. However, the present invention is not limited to this, and a reflective liquid crystal panel may be employed, or a digital micromirror device (DMD) may be employed. Good. DMD is a trademark of Texas Instruments Incorporated.
In each of the embodiments described above, three liquid crystal panels 312 are provided. However, the present invention is not limited to this, and only one liquid crystal panel 312 is provided. Two liquid crystal panels 312 are provided. Four or more liquid crystals are provided. The panel 312 may be provided.

  The present invention can be used for an electronic device, and can be particularly preferably used for a projector.

1 is a perspective view showing an external appearance of a projector according to a first embodiment of the invention. The perspective view which shows the inside of the exhaust port which concerns on the said embodiment. The figure which shows the louver provided in the exhaust port which concerns on the said embodiment. The schematic diagram which shows the structure for rotating the baffle plate which concerns on the said embodiment. The block diagram which shows schematic structure of the projector which concerns on the said embodiment. Schematic which shows an example of the exhaust direction changed by the exhaust direction control part which concerns on the said embodiment. The flowchart which shows the control method of the exhaust direction which concerns on the said embodiment. The figure which shows the attitude | position of a louver at the time of making two front vertexes in the louver which concerns on 2nd Embodiment of this invention protrude from an exterior housing | casing. The figure which shows the attitude | position of a louver at the time of making two downward apexes in the louver which concerns on the said embodiment protrude from an exterior housing | casing. Schematic which shows the louver which concerns on 3rd Embodiment of this invention. Schematic which shows the louver and fan which concern on 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1-1C ... Projector (electronic device), 2 ... Exterior casing, 27 ... Exhaust port, 27A, 27B ... Fan, 28U, 28L, 28F, 28B ... Field sensor (detection means), 32 ... Control means, 33 ... Louver (Air guide member), 34 ... connecting member, 291 ... rectifying plate (first rectifying plate), 301 ... rectifying plate (second rectifying plate), 291A, 301A ... linear actuator (rectifying plate driving unit), 311 ... light source device , 312 ... Liquid crystal panel (light modulation device), 313 ... Projection optical device, 321 ... Storage section, 322 ... Detection state recognition section, 323 ... Exhaust direction selection section, 324 ... Exhaust direction control section, 351 ... Rectification plate, 352 ... Frame members, D1 to D3... Exhaust direction.

Claims (8)

An electronic device comprising an exterior housing having an exhaust port and a fan for exhausting air inside the exterior housing to the outside through the exhaust port,
An exhaust changing means for changing an exhaust direction of air exhausted through the exhaust port;
Detecting means for detecting the presence or absence of an object around the exhaust port;
Control means for controlling the exhaust change means and the detection means,
The detection means outputs the presence or absence of an object around the exhaust port as detection information,
The electronic device according to claim 1, wherein the control unit causes the exhaust gas changing unit to change the exhaust direction based on information detected by the detection unit. The electronic device according to claim 1,
The exhaust gas changing means includes
A rectifying plate that has a rectifying surface that rectifies air exhausted through the exhaust port, and that is configured to be rotatable about a direction that intersects the direction of air discharge by the fan as a rotation axis;
An electronic device comprising: a rectifying plate driving unit that rotates the rotating shaft to change an inclination angle of the rectifying plate with respect to the discharge direction. The electronic device according to claim 2,
The current plate is composed of a first current plate and a second current plate,
The electronic device, wherein the first rectifying plate and the second rectifying plate intersect with each other when viewed from the discharge direction. The electronic device according to claim 1,
The exhaust gas changing means includes
A rectifying plate having a rectifying surface extending across the direction of air discharge by the fan;
A frame member provided at the exhaust port, configured to hold the current plate and to be rotatable about a rotation axis substantially parallel to the discharge direction;
An electronic apparatus comprising: a frame member driving unit that rotates the frame member around the rotation axis. In the electronic device in any one of Claims 1-4,
The exhaust gas changing means includes
A hollow air guide member that is provided at the exhaust port and has an opening in the direction of air discharge by the fan to guide the air;
A connecting member that is formed to be extendable and connects the outer casing and the air guide member;
An electronic apparatus comprising: a connecting member driving unit that expands and contracts at least a part of the connecting member. The electronic device according to any one of claims 1 to 5,
The electronic apparatus according to claim 1, wherein the exhaust gas changing unit includes a fan angle control unit that changes the direction of the fan to a predetermined angle. The electronic device according to any one of claims 1 to 6,
A plurality of the detection means are provided, and the plurality of detection means can detect objects in different spaces,
The control means includes
A detection state recognition unit that recognizes a detection state of an object based on the detection information by the plurality of detection units;
A storage unit that stores exhaust direction information in which the detection state and the exhaust direction are associated;
An exhaust direction selection unit that selects an exhaust direction based on the detection state of the object recognized by the detection state recognition unit and the exhaust direction information stored in the storage unit;
An electronic apparatus comprising: an exhaust direction control unit that controls the exhaust change unit so as to change the exhaust direction to an exhaust direction selected by the exhaust direction selection unit. The electronic device according to claim 1, wherein
The electronic apparatus includes a light source device, a light modulation device that modulates light emitted from the light source device according to image information to form an optical image, and a projection optical device that magnifies and projects the formed optical image. An electronic device comprising a projector.

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