JP6236980B2 - Projector case - Google Patents

Description

  The present invention relates to a case for a projection apparatus.

In a projection device such as a projector, a light source lamp, a liquid crystal panel that modulates light from the light source lamp to generate image light, and a projection lens unit that projects image light generated by the liquid crystal panel onto a projection surface; There is known one having a cabinet for housing these (see, for example, Patent Document 1). Furthermore, in addition to the liquid crystal panel, a projection apparatus provided with other image forming means such as a DLP (digital light processor) is known.
Here, depending on the installation location of the projection apparatus, there is a place where air is more dirty than expected, and in such a place, the deterioration of the projection apparatus proceeds more than expected. Although it is conceivable to improve the dustproof performance of the projection device itself in order to suppress deterioration, it will be equipped with an excessive function for the projection device installed in a general environment, and the economic burden on the user will also be growing.
For this reason, a case that covers the projection device and compensates for dustproof performance is prepared separately from the projection device in advance, and if it is necessary to improve the dustproof performance of the projection device due to the environmental conditions of the installation location, the case is optional. It is also conceivable to take measures against dust after purchase.

JP 2012-242457 A

Here, in the case for the projection apparatus that accommodates the projection apparatus, the projection apparatus may run out of heat unless the heat from the projection apparatus is exhausted to the outside, and a heat dissipation mechanism must be installed. As described above, since the projection apparatus and the case for the projection apparatus are separate and electrically independent, each requires a power source. If the two are not electrically connected, it is necessary to always drive the heat dissipation mechanism of the projector case regardless of the state of the projector. In other words, since the heat dissipation mechanism is driven even when heat dissipation is not required, there is a possibility that the running cost may increase due to wasteful consumption of electric power.
Accordingly, an object of the present invention is to reduce the running cost by enabling the driving state to be changed in accordance with the operating state of the projection device even in the case of the projection device case that is electrically independent of the projection device. It is.

In order to solve the above problems, according to one aspect of the present invention,
A projection unit that projects an optical image formed using light from a light source, a housing that houses the projection unit, a ventilation unit for taking outside air into the housing, and air inside the housing. A case main body that covers the projection device, and an exhaust section that discharges;
A vent provided at a position facing the vent in the case body;
An exhaust port provided at a position facing the exhaust part in the case body ;
A fan for discharging send air before Symbol the case body to the exhaust port,
A first space between the exhaust port and before notated partition portion that the provided within the case body so as to divide the second space containing a § emissions including the vent,
A detection unit for detecting a driving state of the projection device;
A control unit for controlling the pre-notated § down based on the detection result of the detecting section,
With
Wherein the control unit, the projection apparatus based on a detection result of the detecting portion drives the front notated § down in case of judgment as being driven, and judged with the projection device is stopped projection device casing is provided, characterized in that stop before notated § emissions when.

  According to the present invention, even if the projection device case is electrically independent of the projection device, the driving state can be changed in accordance with the operating state of the projection device, and the running cost can be suppressed. Become.

It is a schematic diagram which shows schematic structure of the case for projectors which concerns on this embodiment from upper direction. It is a front view which shows schematic structure of the partition part which concerns on this embodiment. It is a schematic diagram which shows schematic structure of the case for projection apparatuses in which the projection apparatus larger than the case of FIG. 1 was accommodated from upper direction. It is a block diagram which shows the main control structure of the case for projectors of this embodiment. It is a schematic diagram which shows schematic structure of the modification of the case for projectors from upper direction. It is a schematic diagram which shows schematic structure of the modification of the case for projectors from upper direction.

  The best mode for carrying out the present invention will be described below with reference to the drawings. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is a schematic diagram showing the schematic configuration of the projector case according to the present embodiment from above. As shown in FIG. 1, the projection device case 1 covers the projection device 100. In FIG. 1, only the front-rear and left-right directions of the projection apparatus 100 are covered, but the projection apparatus case 1 actually covers the vertical direction of the projection apparatus 100.

First, the projection device 100 projects a light image formed by using light from a light source (not shown), a housing 102 that houses the projection unit 101, and an outside air to be taken into the housing 102. The ventilation part 103 and the exhaust part 104 which exhausts the air inside the housing | casing 102 are provided.
The light source of the projection apparatus 100 is a semiconductor light source including, for example, a light emitting diode or a laser diode.
The ventilation portion 103 is provided on the right side when viewed from the back side of the housing 102. The light image projected from the projection unit 101 is emitted from the front surface of the housing 102 toward the front.
Further, the exhaust unit 104 is provided on the front and left sides as viewed from the back side of the housing 102. The exhaust unit 104 is provided with an exhaust fan (not shown) so that the air in the housing 102 can be forcibly discharged out of the housing 102 by the fan.

The case 1 for the projection device is provided with a case body 2 that covers the projection device 100. The case body 2 is formed in a hollow, for example, substantially rectangular parallelepiped shape that is large enough to accommodate the largest projection apparatus 100 among the projection apparatuses in the product lineup. Each corner of the substantially rectangular parallelepiped shape may be rounded.
In the case body 2, at least a region through which light emitted from the projection unit 101 passes and a region for receiving a signal from a remote controller for operating the projection device 100 are formed of a translucent material. ing. Examples of the light-transmitting material include a plate material made of a light-transmitting resin such as an acrylic plate. For this reason, the case body 2 as a whole may be formed of a plate material made of a translucent resin, or may be formed of a metal plate in a place where translucency is unnecessary. When a metal plate is used, the heat dissipation efficiency can be relatively increased.
In addition, a vent 3 facing the vent 103 is provided on the right side of the case body 2 when viewed from the back side of the projection device 100. Further, an exhaust port 4 facing the exhaust unit 104 is provided on the front surface and the left side surface of the case body 2 when viewed from the back side of the projection device 100.
Note that the brightness and the size of the exhaust fan provided in the exhaust unit 104 differ depending on the model and size of the projection apparatus 100. In general, the size of the fan provided in the small projection device 100 is smaller than the size of the fan provided in the relatively large projection device 100. For this reason, the small projection device 100 often has poor heat dissipation compared to the large projection device 100. Accordingly, when the small projection device 100 is arranged in the projection device case 1, the exhaust fan 6 rotates as compared with the case where the relatively large projection device 100 is arranged in the projection device case 1. The number can be increased. For example, the rotational speed of the exhaust fan 6 can be adjusted in three steps, and the switching can be performed manually. Alternatively, since the size of the concave portion 71 of the partition portion 7 varies depending on the size of the projection device 100, it is possible to automatically change the rotational speed of the exhaust fan 6 by providing a sensor that recognizes the difference in the size of the concave portion 71. It may be.

A filter support portion 32 that supports a dustproof filter 31 is attached to the vent 3 so as to cover the vent 3. The filter support portion 32 holds the filter 31 in a replaceable manner. A ventilation fan 5 for sucking air outside the case main body 2 from the vent hole 3 is provided at a position inside the case main body 2 and facing the vent hole 3. The ventilation fan 5 may not be provided.
On the other hand, an exhaust fan 6 for sending air inside the case body 2 to the exhaust port 4 and exhausting it is provided inside the case body 2 and facing the exhaust port 4.

In addition, a partition 7 that divides the first space H1 including the vent 3 and the vent fan 5 and the second space H2 including the exhaust 4 and the exhaust fan 6 is provided inside the case body 2. ing.
FIG. 2 is a front view showing a schematic configuration of the partition portion 7. The partition portion 7 is a plate material, and a concave portion 71 into which the projection device 100 is fitted is formed at the center portion thereof. When the projection device 100 is fitted into the recess 71, the lower end of the partition portion 7 comes into contact with the bottom plate of the case body 2, and the upper end of the partition portion 7 comes into contact with the top plate of the case body 2. Further, both end portions of the partition portion 7 come into contact with opposite corner portions of the case body 2 as shown in FIG. Thereby, the first space H1 and the second space H2 are partitioned.

  FIG. 3 is a schematic diagram showing from above the schematic configuration of the projection apparatus case 1 in which a larger projection apparatus 100A than the case of FIG. 1 is accommodated. As shown in FIG. 3, when the projection device 100A having a different size is accommodated in the case body 2, a partition 7a having a recess 71a corresponding to the size of the projection device 100A is used. As described above, if the partition portions 7 and 7a having the concave portions 71 and 71a corresponding to the sizes of the projection devices 100 and 100A in the product lineup are prepared in advance, any projection device 100 or 100A can be used. It is possible to partition the first space H1 and the second space H2.

In addition, a detection unit 8 for detecting the driving state of the projection device 100 is provided inside the case body 2. The detection unit 8 is an optical sensor and is disposed at a position where the light emitted from the projection unit 101 of the projection apparatus 100 can be detected. Thereby, the detection unit 8 can detect the presence or absence of light from the projection unit 101.
Examples of the optical sensor include a phototransistor, a photodiode, and the like. These may be used alone, or those having an amplifier circuit connected thereto may be used.

  FIG. 4 is a block diagram showing the main control configuration of the projector case 1 of the present embodiment. As shown in FIG. 4, the projector case 1 is provided with a control unit 9 that controls the ventilation fan 5 and the exhaust fan 6 based on the detection result of the detection unit 8. Specifically, the control unit 9 determines that the projection device 100 is in operation when the light from the projection unit 101 indicates “present” and the detection result of the detection unit 8 indicates that the ventilation device 5 and the exhaust air are exhausted. The fan 6 is driven. On the other hand, the control unit 9 determines that the projection device 100 is stopped when the detection unit 8 indicates that the light from the projection unit 101 is “none”, and the ventilation fan 5 and the exhaust fan 6 are determined. To stop. The ventilation fan 5 and the exhaust fan 6 are stopped simultaneously, or after the ventilation fan 5 is stopped, the exhaust fan 6 is stopped.

Next, the operation of this embodiment will be described.
First, since the projection unit 101 is not irradiated with light when the projection apparatus 100 is stopped, the detection unit 8 sets the detection result to “none”. Thereby, the control unit 9 determines that the projection device 100 is stopped, and stops the ventilation fan 5 and the exhaust fan 6.
Thereafter, when the projection apparatus 100 is driven and a light image is projected from the projection unit 101, the detection unit 8 receives the light and sets the detection result to “present”. The control unit 9 determines that the projection apparatus 100 is being driven and drives the ventilation fan 5 and the exhaust fan 6. Air forcedly sucked from the outside of the case body 2 by the ventilation fan 5 passes through the filter 31 and is purified. Thereafter, the air enters the projection apparatus 100 from the vent 103 through the first space H1. The air that has passed through the projection device 100 is discharged from the exhaust unit 104, enters the second space H <b> 2, and is forcibly discharged from the exhaust port 4 to the outside of the case body 2 by the exhaust fan 6.
When the projection device 100 is stopped again, the detection unit 8 sets the detection result to “None”, so the control unit 9 determines that the projection device 100 is stopped, and the ventilation fan 5 and the exhaust fan 6 To stop. At this time, instead of stopping the ventilation fan 5 and the exhaust fan 6 simultaneously, the exhaust fan 6 may be stopped after the ventilation fan 5 is stopped. In addition, after the projection apparatus 100 is stopped, the ventilation fan 5 and the exhaust fan 6 are not stopped immediately, but are stopped after a predetermined time has elapsed, so that the heat in the projection apparatus case 1 can be reduced. Can be released more.

As described above, according to the present embodiment, since the detection unit 8 that detects the driving state of the projection device 100 is provided in the projection device case 1, the projection device case 1 is electrically independent from the projection device 100. Even if it is, the driving state of the projection apparatus 100 can be detected. When the control unit 9 determines that the projection device 100 is being driven based on the detection result of the detection unit 8, the control unit 9 drives the ventilation fan 5 and the exhaust fan 6 and the projection device 100 is stopped. If it is determined that the ventilation fan 5 and the exhaust fan 6 are stopped, the driving state of the ventilation fan 5 and the exhaust fan 6 can be changed according to the state of the projection device 100. Therefore, running cost can be suppressed.
If there is only the exhaust fan 6 without the ventilation fan 5, the outside air of the case body 2 can be sucked from the vent 3 and discharged from the exhaust 4. However, if the ventilation fan 5 is provided, the outside air can be forcibly sucked and the heat dissipation efficiency can be improved.

  Further, since the dustproof filter 31 is attached to the vent 3, the air can be purified before the air reaches the projection device 100. Further, as described above, if the driving states of the ventilation fan 5 and the exhaust fan 6 are changed in accordance with the state of the projection device 100, air does not pass through the filter 31 when the projection device 100 is stopped. Therefore, deterioration of the filter 31 can also be suppressed. Therefore, the running cost can be further suppressed.

  Here, when light is irradiated from the projection unit 101, the projection apparatus 100 is surely being driven. As described above, if the detection unit 8 is an optical sensor that detects the presence or absence of light from the projection unit 101, the driving state of the projection apparatus 100 can be reliably detected.

Note that the present invention is not limited to the above embodiment, and can be modified as appropriate.
For example, in the above embodiment, the case where the detection unit 8 is an optical sensor has been described as an example. However, any type of detection unit 8 may be used as long as the driving state of the projection apparatus 100 can be detected.
FIG. 5 is a schematic diagram showing a schematic configuration of a projection device case using different types of detection units from above. The detection unit 10 shown in FIG. 5 is a temperature sensor. In the following description, the same portions as those in the above embodiment are denoted by the same reference numerals and the description thereof is omitted.
5 includes an internal temperature sensor 11 that detects the internal temperature of the second space H2, and an external temperature sensor 12 that detects the external temperature of the case body 2. As shown in FIG. Yes. The external temperature sensor 12 is provided at a location that is not easily affected by the exhaust from the case body 2. The internal temperature sensor 11 and the external temperature sensor 12 are, for example, a thermistor.
The internal temperature sensor 11 and the external temperature sensor 12 are connected to the control unit 9 shown in FIG. The controller 9 measures the temperature difference between the internal temperature of the second space H <b> 2 and the external temperature of the case body 2 based on the detection results from the internal temperature sensor 11 and the external temperature sensor 12. The control unit 9 determines that the projection apparatus 100 is being driven when the temperature difference is greater than or equal to a predetermined value, and determines that the projection apparatus 100 is being stopped when the temperature difference is less than the predetermined value. The predetermined value is set to a value at which at least the projection apparatus 100 does not run out of heat and can determine whether or not the projection apparatus 100 is driven.
Thus, even when a temperature sensor is used as the detection unit 10, the driving state of the projection apparatus 100 can be detected.

  Further, even if the region through which the light irradiated from the projection unit 101 passes is formed of a light-transmitting material as in the above embodiment, the front of the projection unit 101 is only slightly covered. However, it weakens the light and is not preferable. In addition, when used for a long period of time, the portion becomes dirty, and the sharpness of the projected image may be reduced. For this reason, it is desirable to form the opening part 21 which opens the path of the optical image from the projection part 101 in the case main body 2b as in the case 1B for the projection apparatus shown in FIG. And in order to ensure the obstruction | occlusion property of the 1st space H1, the wall part 22 surrounding the circumference | surroundings of the path | route of an optical image is formed in the circumference | surroundings of the opening part 21. FIG. One end of the wall portion 22 is in contact with the front surface of the projection apparatus 100. When the detection unit 8 is an optical sensor, at least a portion of the wall portion 22 facing the light receiving unit of the detection unit 8 is made transparent so that the detection unit 8 can detect light from the projection unit 101. It needs to be made of a certain material.

Although several embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and equivalents thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.

[Appendix]
<Claim 1>
A projection unit that projects an optical image formed using light from a light source, a housing that houses the projection unit, a ventilation unit for taking outside air into the housing, and air inside the housing. A case main body that covers the projection device, and an exhaust section that discharges;
A vent provided at a position facing the vent in the case body;
An exhaust port provided at a position facing the exhaust part in the case body;
An exhaust fan, provided at a position facing the exhaust port, for sending air in the case body to the exhaust port and exhausting it;
A partition provided in the case body so as to divide the first space including the vent hole and the second space including the exhaust port and the exhaust fan;
A detection unit for detecting a driving state of the projection device;
A control unit that controls the exhaust fan based on the detection result of the detection unit,
The control unit drives the exhaust fan when determining that the projection device is being driven based on the detection result of the detection unit, and detects the detection unit when the projection device is being stopped. The projector case, wherein the exhaust fan is stopped when judged based on the result.
<Claim 2>
The projector case according to claim 1,
A projection apparatus case, wherein a dustproof filter is attached to the vent hole.
<Claim 3>
In the case for the projection device according to claim 1 or 2,
A ventilation fan provided at a position facing the ventilation hole, for sucking air outside the case body from the ventilation hole;
The control unit drives the ventilation fan when it is determined that the projection device is being driven based on the detection result of the detection unit, and the detection unit detects that the projection device is being stopped. The projector case, wherein the ventilation fan is stopped when judged based on the result.
<Claim 4>
The projector case according to claim 3,
When the control unit determines that the projection device is on the basis of the detection result of the detection unit, the control unit first stops the full-year fan, and then stops the exhaust fan. Projector case.
<Claim 5>
In the case for the projection device according to any one of claims 1 to 4,
The control unit can adjust the rotational speed of the exhaust fan according to the type of the partition unit,
A case for a projection apparatus, wherein at least a region through which light projected from the projection unit of the case main body passes is formed of a translucent material.
<Claim 6>
In the case for a projection device according to any one of claims 1 to 5,
The projector case, wherein the detection unit is an optical sensor that detects the presence or absence of light from the projection unit.
<Claim 7>
In the case for the projection device according to any one of claims 1 to 6,
The projector case, wherein the detection unit is a temperature sensor for detecting a temperature difference between an internal temperature of the second space and an external temperature of the case body.
<Claim 8>
In the case for a projection device according to any one of claims 1 to 7,
A case for a projection apparatus, wherein the case main body is provided with an opening that opens a path of an optical image from the projection unit, and a wall that surrounds the path.

DESCRIPTION OF SYMBOLS 1 Projector case 2 Case body 3 Ventilation hole 4 Exhaust port 5 Ventilation fan 6 Exhaust fan 7 Partition part 8 Detection part 9 Control part 21 Opening part 22 Wall part 31 Filter 100 Projection apparatus 101 Projection part 102 Case 103 Ventilation Part 104 Exhaust part H1 First space H2 Second space

Claims (8)

A projection unit that projects an optical image formed using light from a light source, a housing that houses the projection unit, a ventilation unit for taking outside air into the housing, and air inside the housing. A case main body that covers the projection device, and an exhaust section that discharges;
A vent provided at a position facing the vent in the case body;
An exhaust port provided at a position facing the exhaust part in the case body ;
A fan for discharging send air before Symbol the case body to the exhaust port,
A first space between the exhaust port and before notated partition portion that the provided within the case body so as to divide the second space containing a § emissions including the vent,
A detection unit for detecting a driving state of the projection device;
A control unit for controlling the pre-notated § down based on the detection result of the detecting section,
With
Wherein the control unit, the projection apparatus based on a detection result of the detecting portion drives the front notated § down in case of judgment as being driven, and judged with the projection device is stopped projection device casing, characterized in that the stop before notated § emissions when. The projector case according to claim 1,
The fan is an exhaust fan;
A projection apparatus case, wherein a dustproof filter is attached to the vent hole. The projector case according to claim 2 ,
A ventilation fan provided at a position facing the ventilation hole, for sucking air outside the case body from the ventilation hole;
The control unit drives the ventilation fan when it is determined that the projection device is being driven based on the detection result of the detection unit, and the detection unit detects that the projection device is being stopped. The projector case, wherein the ventilation fan is stopped when judged based on the result. The projector case according to claim 3,
When the control unit determines that the projection apparatus is stopped based on the detection result of the detection unit, the control unit first stops the ventilation fan, and then stops the exhaust fan. Projector case. The case for a projection device according to any one of claims 2 to 4,
The control unit can adjust the rotational speed of the exhaust fan according to the type of the partition unit,
A case for a projection apparatus, wherein at least a region through which light projected from the projection unit of the case main body passes is formed of a translucent material. In the case for a projection device according to any one of claims 1 to 5,
The projector case, wherein the detection unit is an optical sensor that detects the presence or absence of light from the projection unit. In the case for the projection device according to any one of claims 1 to 6,
The projector case, wherein the detection unit is a temperature sensor for detecting a temperature difference between an internal temperature of the second space and an external temperature of the case body. In the case for a projection device according to any one of claims 1 to 7,
A case for a projection apparatus, wherein the case main body is provided with an opening that opens a path of an optical image from the projection unit, and a wall that surrounds the path.

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