JP2012027112A - Projector - Google Patents

Abstract

To provide a projector in which an exhaust port is provided with a shutter structure whose installation location is not limited, and the shutter is closed when the power is turned off to prevent dust from entering the housing.
A projector includes a fan that exhausts heat generated inside a light source device and an exterior housing, an exhaust port that discharges air discharged from the fan, and an exhaust port between the fan and an exhaust port. And an openable exhaust port shutter 4 that is provided and shields the exhaust port 232. In the exhaust port shutter 4, a rectifying plate 41 that rectifies air discharged through the exhaust port 232 in a predetermined direction is formed in parallel with the exhaust port. Each rectifying plate 41 is connected to the holding member 51 and the slide member 52, and the rotation shaft 42 of the portion connected to the holding member 51 rotates about the vertical direction in conjunction with the movement of the slide member 52. As a result, the rectifying plates 41 arranged in parallel overlap each other, thereby closing the exhaust port 232 and preventing dust from entering the exterior housing 2.
[Selection] Figure 1

Description

  The present invention relates to a projector.

Conventionally, a light source device, a light modulation device that modulates a light beam emitted from the light source device according to image information, a projection lens that enlarges and projects a light beam modulated by the light modulation device, a light source device, a light modulation device, There is also known a projector including an exterior housing that houses and arranges a projection lens.
In such a projector, an exhaust port for exhausting heat generated inside the exterior housing is provided to suppress a temperature rise inside the housing, but there is a problem that dust enters from the exhaust port. There is. When dust adheres to an optical component, it causes a reduction in image quality and brightness. For this reason, there is known one in which a shutter mechanism is provided at the exhaust port in order to prevent dust from entering the inside of the housing. (For example, refer to Patent Document 1).
Further, in the projector described in Patent Document 1, the structure in which the shutter mechanism is slid to open and close prevents the dust from entering the housing.

JP 2000-305175 A

However, in the projector described in Patent Document 1, since the shutter mechanism is slid, there is a problem that the sliding portion becomes large when the opening is large. Therefore, it is necessary to secure a large amount of space to form the slide structure, and the installation location is limited.
Therefore, there is a demand for a structure that does not restrict the installation location of the shutter mechanism.

  An object of the present invention is to provide a projector that prevents the entry of dust into the housing by a shutter structure having a function of rectifying air discharged from the inside of the housing and a mechanism for opening and closing without limiting the installation location. There is.

A projector according to this application example includes a light source device, a light modulation device that modulates a light beam emitted from the light source device according to image information, and an exterior housing that houses and arranges the light source device and the light modulation device. A fan for discharging heat generated inside the exterior housing, an exhaust port for discharging the air discharged by the fan to the outside, the fan and the exhaust port, And an openable / closable shutter mechanism that shields the exhaust port, and the shutter mechanism has a rectifying surface that intersects with the exhaust port, and air that is exhausted through the exhaust port. A rectifying plate for rectifying is provided, and the rectifying plate is connected to a connecting member of a holding member and a slide member, and is rotated in conjunction with the movement of the slide member.
According to this application example, since the rectifying plate connected to the connecting portion of the holding member and the slide member is provided, and the exhaust member is closed by the rectifying plate by moving the slide member in the parallel direction, the shutter mechanism is No more space is needed. Furthermore, since the shutter mechanism for closing the exhaust port functions as a rectifying plate when it is open, it is not necessary to provide a separate rectifying plate, so that exhaust can be efficiently performed without requiring a space.

In the projector according to the application example, it is preferable that a plurality of the rectifying plates are provided in parallel to the exhaust port, and the parallel rectifying plates overlap each other when the exhaust port is closed.
According to this application example, since the rectifying plates overlap each other when the shutter mechanism is closed, it is possible to more reliably prevent dust from entering the exterior housing.

  In the projector according to the application example, the rectifying plate includes a rotation shaft that is rotatably connected to the slide member, and a rotation shaft that is rotatably connected to the holding member, and the slide member and the holding member One of the members is provided with a notch, and when the exhaust port is closed, the rotating shaft connected to the other of the slide member and the holding member is accommodated in the notch.

In the projector according to the application example, it is preferable that the rectifying plate is configured to be able to stop at an arbitrary angle with respect to the rotation shaft.
According to this application example, the direction of the exhaust flow can be freely changed. Therefore, when the user hits the projector, the direction of the exhaust flow can be changed so as not to hit the user. Can be made uncomfortable.

The perspective view which looked at the projector which concerns on 1st Embodiment from the upper front side. The top view which shows typically the optical system of the optical unit in this embodiment. The perspective view which shows schematic structure of the exhaust-port shutter and connection member in this embodiment. The top view which expanded the principal part in FIG. The top view which shows the inclination-angle of the baffle plate in FIG. The perspective view in the state where the exhaust-port shutter in this embodiment was closed. The top view which expanded the principal part of the state in which the current plate in FIG. 6 overlapped.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings.
[Configuration of projector]
FIG. 1 is a perspective view of the projector 1 according to the first embodiment as viewed from the upper front side. In the following, the projection direction from the projector 1 is defined as a Z axis, and two axes orthogonal to the Z axis are defined as an X axis (horizontal axis) and a Y axis (vertical axis), respectively.
The projector 1 modulates the light beam emitted from the light source according to the image information, and enlarges and projects it on a projection surface such as a screen. As shown in FIG. 1, the projector 1 is generally configured by a substantially rectangular parallelepiped outer casing 2 and an optical unit 3 (see FIG. 2) housed in the outer casing 2.
Although not specifically shown, in the exterior housing 2, in addition to the optical unit 3, a power supply unit that supplies external power to the constituent members of the projector 1, a cooling unit that cools the interior of the projector 1, It is assumed that a control device for controlling the entire projector 1 is arranged.

The exterior housing 2 is a synthetic resin product by injection molding or the like, and although not specifically illustrated, an upper case that respectively constitutes the top surface, the back surface, and the side surface of the projector 1, and the bottom surface, the back surface of the projector 1, And a lower case that configures the side surfaces of the projector 1 and a side case that configures the side surfaces of the projector 1, and the cases are fixed to each other with screws or the like.
The exterior housing 2 is not limited to being made of synthetic resin, and may be formed of other materials, for example, metal.
In each case, an operation panel for performing the adjustment operation of the projector 1 is formed on the upper surface of the upper case at a substantially central portion. Then, when a plurality of operation buttons on the operation panel are appropriately pressed, the tact switch mounted on the circuit board disposed therein is brought into contact with the desired operation.
The circuit board described above is electrically connected to the control device, and an operation signal that accompanies pressing of the operation button is output to the control device.
Further, in this side case, as shown in FIG. 1, an exhaust port 232 is formed for discharging air from the exhaust fan constituting the cooling unit and exhausting the air inside the exterior housing 2 to the outside.
In addition, as shown in FIG. 1, a plurality of rectifying plates 41 that rectify the air (exhaust flow) exhausted through the exhaust port 232 in a predetermined direction are provided inside the side case, as shown in FIG. 1. An exhaust port shutter 4 is provided. The detailed configuration of the exhaust port shutter 4 will be described later.

FIG. 2 is a plan view schematically showing the optical system of the optical unit 3.
Under the control of the control device, the optical unit 3 modulates the light beam emitted from the light source device according to image information, forms a color image, and enlarges and projects it on the screen via the projection lens.
As shown in FIG. 2, the optical unit 3 includes an integrator illumination optical system 31, a color separation optical system 32, a relay optical system 33, an optical device 34, a projection optical device 35, and an optical component housing 36. With.
An illumination optical axis A is set inside the optical unit 3, and an integrator illumination optical system 31, a color separation optical system 32, a relay optical system 33, and an optical device 34 are accommodated in a predetermined position with respect to the illumination optical axis A. At the same time, the optical component casing 36 supports and fixes the projection optical device 35 at a predetermined position.

  The integrator illumination optical system 31 is an optical system for making the illuminance uniform in the plane orthogonal to the illumination optical axis of the light beam emitted from the light source. As shown in FIG. 2, the integrator illumination optical system 31 includes a light source device 311 including a light source lamp 311A and a reflector 311B, a first lens array 312, a second lens array 313, a polarization conversion element 314, and a superimposing lens. 315. The light beam emitted from the light source lamp 311A is aligned in the emission direction by the reflector 311B, divided into a plurality of partial light beams by the first lens array 312, and forms an image in the vicinity of the second lens array 313. Each partial light beam emitted from the second lens array 313 is incident so that its central axis (principal ray) is perpendicular to the incident surface of the polarization conversion element 314 in the subsequent stage. It is emitted as linearly polarized light. A plurality of partial light beams emitted from the polarization conversion element 314 as linearly polarized light and passed through the superimposing lens 315 are superimposed on three liquid crystal panels (to be described later) of the optical device 34.

The color separation optical system 32 includes two dichroic mirrors 321 and 322 and a reflection mirror 323, and a plurality of partial light beams emitted from the integrator illumination optical system 31 by the dichroic mirrors 321 and 322 and the reflection mirror 323. It has the function of separating into three color lights of red, green and blue.
The relay optical system 33 includes an incident side lens 331, a relay lens 332, and reflection mirrors 333 and 334, and has a function of guiding the color light separated by the color separation optical system 32 to a liquid crystal panel described later.

  The optical device 34 modulates the three color lights emitted from the color separation optical system 32 according to image information, and combines the modulated color lights to form a color image. As shown in FIG. 2, the optical device 34 includes three liquid crystal panels 341 (R-color light liquid crystal panel 341R, G-color light liquid crystal panel 341G, and B-color light liquid crystal panel 341B as light modulation devices. ) And an incident-side polarizing plate 343 and an emitting-side polarizing plate 342 disposed on the light-incident side and the light-emitting side of the liquid crystal panel 341, respectively, and a cross dichroic prism 344.

The incident-side polarizing plate 343 receives light of each color whose polarization direction is aligned in approximately one direction by the polarization conversion element 314, and is substantially the same as the polarization axis of the incident light beam aligned by the polarization conversion element 314. Only polarized light in the direction is transmitted, and other light beams are absorbed. The incident-side polarizing plate 343 has a configuration in which a polarizing film is pasted on a translucent substrate such as sapphire glass or quartz.
Although not specifically illustrated, the liquid crystal panel 341 has a configuration in which a liquid crystal as an electro-optical material is hermetically sealed between a pair of transparent glass substrates, and according to a drive signal output from the control device, The alignment state of the liquid crystal is controlled, and the polarization direction of the polarized light beam emitted from the incident side polarizing plate 343 is modulated.

The exit-side polarizing plate 342 has substantially the same configuration as the incident-side polarizing plate 343, and only the light beam having a polarization axis orthogonal to the transmission axis of the light beam in the incident-side polarizing plate 343 among the light beams emitted from the liquid crystal panel 341. It transmits light and absorbs other light fluxes.
The cross dichroic prism 344 is an optical element that synthesizes modulated light (optical image) modulated for each color light emitted from the emission-side polarizing plate 342 to form image light (color image). The cross dichroic prism 344 has a square shape in plan view in which four right-angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right-angle prisms are bonded together. These dielectric multilayer films are emitted from a liquid crystal panel 341 (341G) disposed on the side facing the projection optical device 35 and transmit color light via the exit side polarizing plate 342, and the remaining two liquid crystal panels 341 ( 341R, 341G), and reflects each color light via each exit-side polarizing plate 342. In this way, the color lights modulated by the liquid crystal panels 341 are combined to form a color image.

As shown in FIG. 2, the projection optical device 35 includes a projection lens 351 as a projection optical device main body.
The projection lens 351 is configured as a combined lens in which a plurality of lenses are housed in a cylindrical lens barrel, and enlarges and projects a color image modulated by the optical device 34 according to image information.

[Exhaust outlet configuration]
FIG. 3 is a perspective view showing a schematic configuration of the exhaust port shutter 4 and the connecting member 5.
FIG. 4 is an enlarged view of a main part in FIG.
As shown in FIG. 3, the exhaust shutter 4 includes a plurality of rectifying plates 41, and the rectifying plates 41 are connected to the connecting member 5 and interlocked with the movement of the connecting member 5 in the projection direction (−Z axis direction). The plurality of rectifying plates 41 are configured to be rotatable.
As shown in FIG. 3, the plurality of rectifying plates 41 are configured by a plate body having a substantially rectangular shape in plan view, and both opposing surfaces of the plate body become rectifying surfaces 411, and exhaust ports 232 (FIG. 1) The air (exhaust flow) discharged through the air is rectified in a predetermined direction. The plurality of rectifying plates 41 are arranged on the holding member 51 via the plurality of rotating shafts 42 so that the respective rectifying surfaces 411 are parallel to each other and intersect the projection direction (Z-axis direction).

  The plurality of rotating shafts 42 are members that are attached to the top and bottom surfaces of the holding member 51 at both ends, and pivotally support the plurality of rectifying plates 41 respectively. More specifically, as shown in FIG. 3, the plurality of rotating shafts 42 are attached to the top surface and the bottom surface of the holding member 51 such that the axes are directed in the vertical direction (Y-axis direction). Then, each rectifying plate 41 is centered on the vertical axis (Y axis) so as to change the inclination angle θ (see FIG. 5) of the rectifying surface 411 with respect to the plane (XY plane) orthogonal to the projection direction by each rotating shaft 42. As shown in FIG.

The connecting member 5 includes a holding member 51 and a slide member 52. The holding member 51 holds the rotation shaft 42 of each rectifying plate 41, and the slide member 52 has a moving force in the projection direction (−Z axis direction). It is a member that transmits to the transmission shaft 43 of the rectifying plate 41 and rotates each rectifying plate 41 about the rotating shaft 42.
As shown in FIG. 3, the slide member 52 is constituted by a plate body extending in the projection direction (Z-axis direction), and the transmission shafts 43 of the respective rectifying plates 41 are inserted into a plurality of holes formed in the slide member 52. Yes.

FIG. 4 is an enlarged plan view of the main part of FIG.
As shown in FIG. 4, the plurality of transmission shafts 43 are held in the holes of the slide member 52, connect the current plate 41 and the slide member 52, and transmit the moving force of the slide member 52 to the current plate 41. is there. More specifically, the plurality of transmission shafts 43 have a cylindrical shape. When the slide member 52 is moved, the side surfaces of the plurality of holes vacated in the slide member 52 press the transmission shaft 43 in the projection direction (−Z axis direction). That is, each rectifying plate 41 is centered on the vertical axis (Y-axis direction) via each rotation shaft 42 in conjunction with the movement of the slide member 52 by the pressing in the projection direction (−Z-axis direction) by the transmission shaft 43. Rotate as In addition, each transmission shaft 43 can move so as to be retracted without contacting the notch 511 of the holding member 51 with the rotation of each rotation shaft 42.

FIG. 5 is a plan view showing the inclination angle of the current plate in FIG.
As shown in FIG. 5, the arrangement position of the slide member 52 or the plurality of transmission shafts 43 is not particularly limited. That is, the relationship between the rectifying surface 411 of each rectifying plate 41 and the inclination angle θ with respect to the XY plane is not particularly limited. For example, the slide member 52 or the transmission shaft 43 may be arranged so that each rectifying surface 411 of each rectifying plate 41 is parallel to the XY plane (the inclination angle θ is substantially 0 °). It may be set according to

FIG. 6 is a perspective view of the exhaust port shutter 4 in a closed state.
By transmitting the moving force of the slide member 52 in the projection direction (−Z axis direction) to the transmission shaft 43, each rectifying plate 41 rotates about the vertical direction (Y axis direction) of each rotating shaft 42. To close the exhaust shutter 4. Further, the slide member 52 is disposed on the top surface or the bottom surface of the holding member 51 without contacting the holding member 51 as each rectifying plate 41 rotates.

FIG. 7 is an enlarged plan view of a main part in a state where the rectifying plates 41 in FIG. 6 overlap each other.
Each rectifying plate 41 is arranged such that adjacent rectifying plates 41 overlap each other while changing the inclination angle θ of the rectifying surface 411 as each rotating shaft 42 rotates. When the inclination angle θ of the rectifying surface 411 reaches a certain angle, the respective rectifying plates 41 are arranged in a straight line in the projection direction (Z-axis direction). That is, the rectifying plates 41 overlap so as to close the exhaust port 232. Specifically, each rectifying plate 41 has a shape that overlaps both end faces as shown in FIG. 7, and has a structure in which a gap is difficult to see when adjacent rectifying plates 41 overlap each other. Due to the shape of the rectifying plate 41, the dust does not easily enter from the exhaust port 232.

The first embodiment described above has the following effects.
In the present embodiment, the exhaust port shutter 4 provided in the vicinity of the exhaust port 232 includes a plurality of rectifying plates 41, and the slide member 52 moves in the projection direction (−Z axis direction) that is the parallel direction of the exhaust port 232. In addition, it is configured to be rotatable so as to change the inclination angle θ of the rectifying surface 411 with respect to the plane orthogonal to the horizontal direction in conjunction with the movement. As a result, when the user is present near the exhaust port 232, each rectifying plate 41 can be rotated so as to rectify the exhaust flow toward the side away from the user in conjunction with the movement.

  Further, the installation location of the exhaust port shutter 4 is not limited as compared with the conventional configuration in which the exhaust port shutter is slid. For example, in the method of sliding the exhaust port shutter, the part to be slid must be moved inside or outside the projector 1, and when moving to the inside of the projector 1, it is necessary to secure a space for only the part to be slid. When it is necessary and moved to the outside of the projector 1, the portion to be slid out pops out, and the projector 1 becomes large. Moreover, when the opening part of an exhaust port is large, the part to slide will also become large. Therefore, when the exhaust port shutter 4 is configured by the plurality of rectifying plates 41 as in the present embodiment, the exhaust port 232 can be closed with a small amount of movement of the slide member 52. Further, if the holding member 51 is formed as much as the opening space of the exhaust port 232, the exhaust port shutter 4 can be formed with a necessary minimum space.

  Further, by making the shape of both end faces of the rectifying plate 41 so that the adjacent rectifying plates 41 overlap each other, each rectifying plate 41 is arranged in a straight line in the projection direction (Z-axis direction). 41 can be reduced, and the effect of preventing entry of dust and the like from the exhaust port 232 is enhanced.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Exterior housing, 4 ... Exhaust port shutter, 5 ... Connection member, 35 ... Projection optical apparatus, 41 ... Current plate, 42 ... Rotating shaft, 43 ... Transmission shaft, 51 ... Holding member, 52 ... Slide 232 ... exhaust port, 311 ... light source device, 341 ... liquid crystal panel (light modulation device), 351 ... projection lens (projection optical device body), 411 ... rectifying surface, 511 ... notch.

Claims (4)

A projector comprising: a light source device; a light modulation device that modulates a light beam emitted from the light source device according to image information; and the light source device and an exterior housing that houses and arranges the light modulation device. ,
A fan for discharging heat generated in the exterior housing, an exhaust port for discharging the air discharged from the fan to the outside, and the exhaust port provided between the fan and the exhaust port. And an openable shutter mechanism that shields,
The shutter mechanism is provided with a rectifying plate that rectifies air discharged through the exhaust port having a rectifying surface intersecting the exhaust port,
The rectifying plate is connected to a connecting member of a holding member and a slide member, and rotates in conjunction with the movement of the slide member. The projector according to claim 1.
A plurality of the rectifying plates are provided in parallel to the exhaust port, and the rectifying plates arranged in parallel when the exhaust port is closed overlap each other. The projector according to claim 1 or 2,
The rectifying plate includes a rotation shaft that is rotatably connected to the slide member, and a rotation shaft that is rotatably connected to the holding member, and one of the slide member and the holding member is notched. And the rotary shaft connected to the other of the slide member and the holding member is accommodated in the notch when the exhaust port is closed. The projector according to claim 3.
The rectifying plate is configured to be able to stop at an arbitrary angle with respect to the rotating shaft.

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