JP2009210862A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of achieving improvement of cooling efficiency by smoothly exhausting inside air. <P>SOLUTION: An exhaust duct 42 constituting the projector is formed like a cylinder extending in one direction. A first louver 6 extending in an up-and-down direction and having a plurality of first vanes 61 inclined to a plane S orthogonal to an extending direction of the exhaust duct 42, and a second louver 7 extending in the up-and-down direction and having a plurality of second vanes 71 inclined to the first vanes 61 are provided inside the exhaust duct 42. The respective louvers 6 and 7 are provided to be separate from each other in the extending direction of the exhaust duct 42. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector.

2. Description of the Related Art Conventionally, there is known a projector that modulates a light beam emitted from a light source according to image information and projects it on a screen or the like.
In general, such a projector employs a cooling structure that discharges high-temperature air inside the exterior housing to the outside in order to avoid a temperature rise (see, for example, Patent Document 1).
The cooling structure described in Patent Document 1 is opposed to an axial fan that sucks and discharges air in the vicinity of the light source device, and an exhaust port that has one end located on the axial fan side and the other end formed in the exterior casing. And a cylindrical exhaust duct that guides the air discharged from the axial fan to the exhaust port.
Further, an internal louver having a plurality of blades whose respective plate surfaces are inclined with respect to a plane perpendicular to the extending direction of the exhaust duct is provided inside the exhaust duct. The internal louver rectifies the air flowing inside the exhaust duct in a predetermined direction and discharges it outside the projector, and prevents leakage light introduced inside the exhaust duct from leaking outside the projector.

JP 2003-215710 A

  However, in the projector described in Patent Document 1, in order to prevent light leakage by the internal louver, when the inside of the exhaust duct is viewed from the other end, the opening on one end side is closed by the internal louver. For example, a configuration is required in which the width dimension in the inclination direction of each wing plate is increased, or the inclination angle of each wing plate with respect to a plane orthogonal to the extending direction of the exhaust duct is reduced. When the internal louver has the above-described configuration, when air flows through the exhaust duct, the flow resistance increases due to friction with the internal louver, and the air is smoothly discharged so that the air inside the projector It is difficult to improve the cooling efficiency.

  An object of the present invention is to provide a projector that can smoothly discharge internal air and improve cooling efficiency.

  The projector according to the present invention includes an exterior casing having an exhaust port for exhausting internal air to the outside, and an exhaust duct that is disposed inside the exterior casing and guides the internal air to the exhaust port. The exhaust duct is formed in a cylindrical shape extending in one direction, and the exhaust duct is inclined with respect to a plane extending in the first direction and orthogonal to the extension direction of the exhaust duct. A first louver having a plurality of first slats, and a second louver having a plurality of second slats extending in the first direction and inclined with respect to the first slats, The louvers are provided in a state of being separated from each other along the extending direction of the exhaust duct.

  In the present invention, the exhaust duct has a plurality of first wing plates and second wing plates that extend in the same direction and are inclined with respect to a plane orthogonal to the extending direction of the exhaust duct in different inclination directions. 1 louver and 2nd louver are provided. That is, since two louvers are provided, when each louver is provided with a light blocking function for preventing light leakage, an inclination in each slat is compared with a conventional configuration in which one internal louver is provided. The width dimension in the direction can be set short, and the inclination angle of each vane with respect to the plane perpendicular to the extending direction of the exhaust duct can be set large. For this reason, when air flows through the inside of the exhaust duct, friction with each louver can be reduced, that is, the flow resistance can be reduced, and air can be smoothly discharged to improve the cooling efficiency inside the projector.

  Each louver is provided in a state of being separated from each other along the extending direction of the exhaust duct. Thus, for example, compared with a configuration in which the louvers are connected to each other along the extending direction of the exhaust duct, air can be circulated through the gaps of the louvers, so that the flow path resistance can be reduced. .

  In the projector according to the aspect of the invention, each of the louvers is integrally formed with the exhaust duct, and the exhaust duct is divided into two on a plane orthogonal to the first direction and is configured by a pair of duct members that are combined with each other. The first divided slat part of one of the slats, the first split slat part at one end of the first slat part projecting along one surface of the slats, and the other The first projections on the other side projecting along the plate surface are alternately formed in the order of the first projections on the one side and the first projections on the other side along the direction of inclination of each slat. At the front end portion of the two-divided slats, a first second projection projecting along the one plate surface and a second second projection projecting along the other plate surface are the first segment. Contrary to the slats, the second projections on the other side and the first ones on the one side along the inclined direction. Alternately formed in the order of protrusions, the first divided slats and the second divided slats, the one side first protrusion and the one side second protrusion are connected in the inclined direction, It is preferable that the other side second protrusion and the other side first protrusion are combined with each other in a state in which the other side first protrusion is provided in the inclined direction.

  In the present invention, the exhaust duct is divided into two parts, a duct member having one first divided slat part into which each slat is divided and a duct member having the other second divided slat part. Consists of. Each of the first divided slats and the second divided slats has the above-described protrusions at each tip portion, and the one side first protrusion and the one side second protrusion are continuously provided in the inclined direction. The other-side second protrusion and the other-side first protrusion are combined with each other in a state of being connected in the inclined direction. As a result, for example, even if the exhaust duct is distorted due to the heat of the air flowing through the inside of the exhaust duct, it is avoided that the tip portion of each divided slat is shifted, The connection state of the plate portion can be maintained well. For this reason, it is possible to smoothly discharge the air without causing the distal end portions of the divided blade portions to shift and increase the flow resistance.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[Appearance structure]
FIG. 1 is a perspective view of an external appearance of the projector 1 according to the present embodiment as viewed from the front upper side.
Note that “upper”, “lower”, “left”, and “right” described below correspond to up, down, left, and right in the drawing view of FIG. In addition, “front” and “back” described below correspond to the front and back in the drawing view of FIG.
The projector 1 modulates a light beam emitted from a light source according to image information to form image light, and enlarges and projects the formed image light on a screen (not shown). As shown in FIG. 1, the projector 1 includes an exterior casing 2 that constitutes an exterior.

The exterior housing 2 accommodates the apparatus main body of the projector 1. As shown in FIG. 1, the exterior housing 2 includes an upper case 21 that constitutes a top surface portion, a front surface portion, a back surface portion, and a side surface portion of the projector 1, and a bottom surface portion, a front surface portion, a back surface portion of the projector 1, And a lower case 22 constituting the side portions.
As shown in FIG. 1, the exterior casing 2 is formed with an exhaust port 23 for exhausting air inside the exterior casing 2 to the outside from the left side portion of the front surface portion to the front surface side of the left side surface portion. .
The exhaust port 23 is formed with an external louver 24 in which a plurality of rectifying plates 24A are arranged in a grid pattern.

[Internal configuration]
FIG. 2 is a diagram schematically showing the apparatus main body accommodated in the exterior housing 2.
The main body shown in FIG. 2 is accommodated in the exterior housing 2. The apparatus main body includes an optical unit 3 and an exhaust device 4.
Although not shown in the drawings, a space other than the members 3 and 4 in the exterior housing 2 is provided with a cooling fan or the like that introduces air into the projector 1 and cools the internal components. It is assumed that a cooling unit, a power supply unit that supplies power to each component of the projector 1, a control device that controls the operation of each component of the projector 1, and the like are arranged.

[Configuration of optical unit]
As shown in FIG. 2, the optical unit 3 includes a light source device 31 having a light source lamp 311 and a reflector 312, an illumination optical device 32 having lens arrays 321, 322, a polarization conversion element 323, and a superimposing lens 324, and a dichroic mirror. 331, 332, a color separation optical device 33 having a reflection mirror 333, an incident side lens 341, a relay lens 343, a relay optical device 34 having reflection mirrors 342, 344, and three liquid crystal panels 351 as light modulation devices. (The liquid crystal panel on the red light side is 351R, the liquid crystal panel on the green light side is 351G, and the liquid crystal panel on the blue light side is 351B), three incident-side polarizing plates 352, three outgoing-side polarizing plates 353, and color synthesis An optical device 35 having a cross dichroic prism 354 as an optical device; And a projection lens 36 as a projection optical device.

Note that the optical components 31 to 36 described above are used as optical systems for various general projectors, and thus will not be specifically described.
In the optical unit 3, the light beam emitted from the light source device 31 and passing through the illumination optical device 32 is separated into three color lights of R, G, and B by the color separation optical device 33 by the configuration described above. Each separated color light is modulated by each liquid crystal panel 351 in accordance with image information, and image light for each color light is formed. The image light for each color light is combined by the cross dichroic prism 354 and enlarged and projected on the screen (not shown) by the projection lens 36.

[Configuration of exhaust system]
FIG. 3 is a perspective view of the exhaust device 4 as seen from the upper front side.
FIG. 4 is an exploded perspective view of the exhaust device 4 as viewed from the upper front side.
The exhaust device 4 is disposed in a corner portion on the left side of the front surface inside the exterior housing 2, and discharges high-temperature air staying inside the exterior housing 2 to the outside through the exhaust port 23. As shown in FIG. 3 or 4, the exhaust device 4 includes an axial fan 41 (FIG. 4) and an exhaust duct 42.

The exhaust duct 42 has a substantially rectangular tube shape extending in one direction, and is disposed such that one end 421 is positioned on the front side of the light source device 31 and the other end 422 faces the exhaust port 23. Air in the vicinity of 31 is guided to the exhaust port 23. The exhaust duct 42 includes a first duct member 420A and a second duct member 420B that are divided by a plane (horizontal plane) along the extending direction at a substantially central portion in the vertical direction and combined with each other.
As shown in FIG. 4, the exhaust duct 42 has a concave portion 423 that is recessed outwardly corresponding to the outer shape of the axial fan 41, as shown in FIG. 4. The axial fan 41 is fitted into the recesses 423 of the duct members 420A and 420B when the duct members 420A and 420B are combined with each other, and the air suction direction and the discharge direction are the extending directions of the exhaust duct 42. Along the exhaust duct 42.

Further, as shown in FIG. 4, an internal louver 5 formed by combining the duct members 420 </ b> A and 420 </ b> B is integrally formed on the other end 422 side with respect to the recess 423.
FIG. 5 is a cross-sectional view showing the configuration of the internal louver 5. Specifically, FIG. 5 is a cross-sectional view of the exhaust duct 42 cut along a horizontal plane.
The internal louver 5 rectifies the air flowing along the air flow path R inside the exhaust duct 42 and discharges it from the other end 422 in a predetermined direction (left direction in this embodiment), and exhausts from the one end 421. It has a light blocking function for blocking leaked light introduced into the duct 42. As shown in FIG. 5, the internal louver 5 includes a first louver 6 and a second louver 7 that is provided on the downstream side of the flow path R with respect to the first louver 6.

The first louver 6 includes a plurality (three in the present embodiment) of first blades 61 extending in the vertical direction.
As shown in FIG. 5, each first slat 61 is inclined such that each plate surface forms an inclination angle θ1 with respect to a plane S orthogonal to the extending direction of the exhaust duct 42, and the left and right directions are at a predetermined pitch. Are installed side by side. In the present embodiment, each first slat 61 is inclined along the flow path R in an inclination direction D1 from left to right.

Similar to the first louver 6, the second louver 7 includes a plurality of (four in this embodiment) second wing plates 71 extending in the vertical direction.
As shown in FIG. 5, each of the second slats 71 is inclined with respect to each first slat 61 at an inclination angle θ2 with respect to the plane S and aligned in the left-right direction at a predetermined pitch. It is installed. In the present embodiment, each second slat 71 is tilted along the flow path R in the tilt direction D2 from right to left.

In the present embodiment, the inclination angles θ1 and θ2 are set to the same angle (for example, 55 °), and each of the first slats 61 and each of the second slats 71 has a “C” shape. It is provided to become.
Further, the width dimension in the inclination direction D1 of each first blade 61 and the width dimension in the inclination direction D2 of each second blade 71 are set to be the same, and the pitch in each first blade 61 and each of the first blades 61 are set. The pitch in the two slats 71 is set to be the same.
Further, the louvers 6 and 7 are provided in a state in which the center positions P1 and P2 of the inclination directions D1 and D2 of the blades 61 and 71 are shifted in the left-right direction.
By providing the louvers 6 and 7 as described above, when the inside of the exhaust duct 42 is viewed from the other end 422 to the one end 421, the opening portion of the one end 421 is closed by the louvers 6 and 7. .
In addition, by providing each louver 6, the air flowing along the flow path R is rectified right diagonally forward by the first louver 6 as shown in FIG. 5 and also by the second louver 7. The air is rectified to the left front side and discharged to the outside of the exterior housing 2 through the exhaust port 23.

  As described above, the exhaust duct 42 is composed of the duct members 420A and 420B that are divided in a horizontal plane at a substantially central portion in the vertical direction. It is divided by a horizontal plane at a substantially central portion in the direction. In the following, as shown in FIG. 4, a portion of each of the slats 61 and 71 that is integrally formed with the first duct member 420A is referred to as a first divided slat 8 and is integrally formed with the second duct member 420B. The part is defined as a second divided slat 9. That is, when the duct members 420A and 420B are combined with each other, the wing plates 61 and 71 are constituted by the first divided wing plate portion 8 and the second divided wing plate portion 9, respectively.

FIG. 6 is a perspective view showing the shape of the tip portion of each of the divided blade portions 8 and 9. Specifically, FIG. 6A is a perspective view of the front end portion of the first divided wing plate portion 8 as viewed from the lower front side, and FIG. It is the perspective view seen from the upper side.
In FIG. 6, for the sake of convenience of explanation, the divided blade portions 8 and 9 constituting the first blade 61 are illustrated, but the divided blade portions 8 and 9 constituting the second blade 71 are also illustrated. It shall have the same shape.
As shown in FIG. 6 (A), the first divided slat 8 has a first side projecting along one plate surface S1 (left plate surface) of each slat 61, 71 as shown in FIG. A protrusion 81 and the other first protrusion 82 that protrudes along the other plate surface S2 (right plate surface) are formed. Each of the protrusions 81 and 82 has substantially the same shape, and is formed so as to have a thickness dimension approximately half that of each of the slats 61 and 71. The protrusions 81 and 82 are alternately formed in the order of the first first protrusion 81 and the other first protrusion 82 along the inclination direction D1 of the first slat 61.

As shown in FIG. 6 (B), at the tip end portion of the second divided wing plate portion 9, as in the first divided wing plate portion 8, one side second protruding portion protruding along one plate surface S1. 91 and the other-side second protrusion 92 that protrudes along the other plate surface S2. And these each protrusion 91,92 is alternately formed in order of the other side 2nd protrusion 92 and the 1st side 2nd protrusion 91 in the inclination direction D1, contrary to the 1st division | segmentation blade board part 8. FIG. Has been.
In addition, the projecting portions 91 and 92 are connected to each other at the end portions adjacent to each other by a connecting projecting portion 93. That is, each protrusion 91, 92 and the connection protrusion 93 are formed to have a crank shape.

FIG. 7 is a view showing a state in which the divided blade portions 8 and 9 are combined. Specifically, FIG. 7A is a perspective view of a state in which the divided slats 8 and 9 are combined as seen from the upper front side, and FIG. 7B is a cross-sectional view taken along line BB in FIG. It is sectional drawing of a line.
When the duct members 420A and 420B are combined with each other due to the shape described above, the one side first protrusion 81 is on the one plate surface S1 side of the other side second protrusion 92, as shown in FIG. Get into the space. On the other hand, the second protrusion 92 on the other side enters the space portion on the other plate surface S2 side of the first protrusion 81 on the one side.
Similarly, the other side first protrusion 82 enters the space portion on the other plate surface S2 side in the one side second protrusion 91. On the other hand, the one side second protrusion 91 enters the space portion on the one plate surface S1 side in the other side first protrusion 82.
Further, the connection protrusion 93 enters between the first side first protrusion 81 and the first side protrusion 82 on the other side.
As described above, the duct members 420A and 420B are combined with each other, so that the one-side first protrusion 81 and the one-side second protrusion 91 are continuously provided along the inclination direction D1, and the other-side second. In a state where the protrusion 92 and the first protrusion 82 on the other side are continuously provided, the tip portions of the divided blade portions 8 and 9 are engaged with each other to form the first blade 61.

The embodiment described above has the following effects.
In the present embodiment, the exhaust duct 42 constituting the projector 1 has a plurality of first blades 61 and 71 extending in the same direction and inclined with respect to the plane S in different inclination directions D1 and D2. A louver 6 and a second louver 7 are provided. That is, since the two louvers 6 and 7 are provided, when each louver 6 and 7 is provided with a light blocking function for preventing light leakage, compared to the conventional configuration in which one internal louver is provided. In addition, the width dimension of the inclination directions D1 and D2 in each of the blades 61 and 71 can be set short, and the inclination angles θ1 and θ2 of the blades 61 and 71 with respect to the plane S orthogonal to the extending direction of the exhaust duct 42 are set large. it can. For this reason, when air flows through the exhaust duct 42, friction with the louvers 6 and 7 can be reduced, that is, the flow resistance can be reduced, and the air can be smoothly discharged to improve the cooling efficiency inside the projector 1. It can be improved.

  The louvers 6 and 7 are provided in a state of being separated from each other along the extending direction of the exhaust duct 42. Accordingly, for example, air can be circulated through the gaps between the louvers 6 and 7 as compared with a configuration in which the louvers 6 and 7 are connected to each other along the extending direction of the exhaust duct 42. The channel resistance can be reduced.

  Further, the exhaust duct 42 is divided into two parts, a first duct member 420A having one first divided blade part 8 into which the respective blades 61 and 71 are divided, and the other second divided blade part 9. It is comprised with 2 bodies of 2nd duct member 420B which has. The first divided slat 8 and the second divided slat 9 have the above-described protrusions 81, 82, 91, 92 formed at their respective tip portions, and the one side first protrusion 81 and the one side first The two protrusions 91 are connected in the inclined direction D1, and the other side second protrusion 92 and the other side first protrusion 82 are combined with each other in a state of being connected in the inclined direction D1. Thus, for example, even when the exhaust duct 42 is distorted due to the heat of the air flowing through the exhaust duct 42, the tip portions of the divided blade portions 8 and 9 are prevented from being displaced. And the connection state of each division | segmentation wing board part 8 and 9 can be maintained favorable. For this reason, the tip portions of the divided blade portions 8 and 9 are not displaced and the flow resistance is not increased, and air can be discharged smoothly.

Further, as described above, the exhaust duct 42 has a rectifying function and a light shielding function, and is composed of a duct having a small flow path resistance. Therefore, the rotational speed of the axial fan 41 is increased more than necessary, and the interior of the projector 1 is increased. Therefore, it is not necessary to improve the cooling efficiency of the projector 1, and it is possible to save the power of the projector 1 and to ensure quietness.
Further, since the axial fan 41 is disposed inside the exhaust duct 42, the air flowing through the exhaust duct 42 causes the heat of the axial fan 41 itself when the axial fan 41 is driven through the exhaust port 23. Can be discharged to the outside. For this reason, the effect that the cooling efficiency inside the projector 1 can be improved can be suitably achieved.

It should be noted that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the above-described embodiment, the louvers 6 and 7 are integrally formed inside the exhaust duct 42. However, the present invention is not limited to this, and the louvers 6 and 7 may be configured separately.
In the above embodiment, the exhaust duct 42 is provided with the two louvers 6, 7, but the present invention is not limited to this, and three or more louvers may be provided. In this case, it is preferable to provide three or more louvers in a state of being separated from each other along the extending direction of the exhaust duct 42.
In the above embodiment, the first divided slat 8 is provided with only two protrusions, that is, the first protrusion 81 on the one side and the first protrusion 82 on the other side. It is also possible to adopt a configuration in which a protrusion is provided. At this time, it is preferable to alternately provide the first first protrusions 81 and the first protrusions 82 on the other side in order along the inclination direction. Similarly, the second divided blade part 9 may be formed in accordance with the shape of the tip portion of the first divided blade part 8.
In the above-described embodiment, the connection projection 93 is formed on the second divided slat 9, but the present invention is not limited to this, and the connection projection 93 may be omitted.

In the above embodiment, the transmissive liquid crystal panel 351 is used as the light modulation device. However, the present invention is not limited to this, and the reflective liquid crystal panel or DMD (Digital Micromirror Device) (Texas Instruments Inc., USA) is used. Trademark) or the like.
In the embodiment, only the example of the front projection type projector has been described, but the present invention is also applicable to a rear type projector that includes a screen and performs projection from the back side of the screen.

  INDUSTRIAL APPLICABILITY The present invention can be used for projectors used in presentations and home theaters because the internal air can be smoothly discharged to improve cooling efficiency.

The perspective view which looked at the appearance of the projector in this embodiment from the front upper part side. The figure which shows typically the apparatus main body accommodated in the exterior housing | casing in the said embodiment. The perspective view which looked at the exhaust apparatus in the said embodiment from the front upper side. The disassembled perspective view which looked at the exhaust apparatus in the said embodiment from the front upper side. Sectional drawing which shows the structure of the internal louver in the said embodiment. The perspective view which shows the shape of the front-end | tip part of each division | segmentation slat board part in the said embodiment. The figure which shows the state with which each division | segmentation blade part in the said embodiment was combined.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior housing, 6 ... 1st louver, 7 ... 2nd louver, 8 ... 1st division | segmentation blade part, 9 ... 2nd division | segmentation blade , 23 ... exhaust port, 42 ... exhaust duct, 420A, 420B ... duct member, 61 ... first slat, 71 ... second slat, 81 ... one side first 1 protrusion, 82... The other side first protrusion, 91... The one side second protrusion, 92... The other side second protrusion, D 1, D 2. A flow path, S ... plane, S1, S2 ... plate surface.

Claims (2)

A projector comprising an exterior housing having an exhaust port for exhausting internal air to the outside, and an exhaust duct disposed inside the exterior housing and guiding the internal air to the exhaust port,
The exhaust duct is formed in a cylindrical shape extending in one direction,
Inside the exhaust duct,
A first louver having a plurality of first slats extending in a first direction and inclined with respect to a plane perpendicular to the extending direction of the exhaust duct;
A second louver extending in the first direction and having a plurality of second slats inclined with respect to the first slats;
Each of the louvers is provided in a state of being separated from each other along the extending direction of the exhaust duct. The projector according to claim 1, wherein
Each louver is integrally formed with the exhaust duct,
The exhaust duct is composed of a pair of duct members that are divided into two in a plane perpendicular to the first direction and combined with each other,
One end first protrusion projecting along one plate surface of each of the blades, and the other plate at a tip portion of one of the first divided blades divided into two in each blade. The other side first protrusions protruding along the surface are alternately formed in the order of the one side first protrusion and the other side first protrusion along the inclination direction of each slat.
At the tip of the other second divided slat plate portion, there are one second projection projecting along the one plate surface and the other second projection projecting along the other plate surface. Contrary to the first divided slats, the other side second protrusion and the one side second protrusion are alternately formed along the inclined direction,
In the first divided slat and the second divided slat, the one side first protrusion and the one side second protrusion are continuously provided in the inclined direction, and the other side second protrusion and A projector characterized in that the first protrusions on the other side are combined with each other in a state of being connected in the tilt direction.

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