JP2009047944A - Image display projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image display projector capable of preventing the entry of dust and other foreign objects into the projector body when it is stored. <P>SOLUTION: In the image display projector 1, the projection lens 32 includes a protective cap 5 covering the front of the lens. The housing 11 includes an inlet 12 to take in outside air to remove heat generated in the housing 11 and an outlet 13 to discharge the warmed air to the outside of the housing 11. Each of the inlet 12 and the outlet 13 internally includes a shutter mechanism 6 to close it. It is so constructed that the protective cap 5 can rotate after being mounted on the projection lens 32 and that the shutter mechanisms 6 close and open according to the rotation of the protective cap 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an image display projector that projects an image and displays the image on a screen or the like. In particular, when such an image display projector is stored (when not in use), dust such as dust enters the inside of the main body. Can be prevented.

  Conventionally, based on image data from a playback device such as a personal computer or an optical disk, an image is formed by an image forming element using light emitted from a light source unit, and an image formed by the image forming element is projected. There is an image display projector that projects and displays on a screen by an image forming unit having a projection lens for displaying an image. In such an image display projector, it is necessary to quickly exhaust the heat generated inside the main body to prevent the inside of the main body from becoming high temperature.

  For this reason, conventionally, an intake port for taking in outside air to release heat generated inside the main body and an exhaust port that absorbs heat and exhausts warmed outside air to the outside of the main body are provided in the housing of the image display projector. I am trying to provide it. However, when storing this type of image display projector, dust such as dust intrudes into the main body from the air intake and exhaust ports, adheres to optical components such as the light source unit and image forming means, and appears in the projected image. There are inconveniences such as projecting shadows.

Conventionally, as a countermeasure, for example, a box-shaped cover member that covers the projection lens and either the intake port or the exhaust port provided on the same surface as the projection lens is rotated from the side surface of the housing by a hinge mechanism. Some are formed so as to be movable (see Patent Document 1).
JP 2007-10709 A

  However, in the configuration described in Patent Document 1, the box-shaped cover member covers either one of the intake port and the exhaust port provided on the same surface as the projection lens together with the housing. The members themselves are large, and the image display projector becomes large. Further, since the cover covers only one of the intake port and the exhaust port, there is a problem that dust enters the inside of the main body from the other side.

  The present invention has been made to solve the above-described problems, and prevents dust and the like from entering the inside of the main body when storing this type of image display projector (when not in use). An object is to provide an image display projector.

  In order to achieve this object, in the present invention, a light tunnel having a light source unit that emits light for image projection, and a light guide that receives the light emitted from the light source unit and guides the incident light. And an image forming means having a projection lens for forming an image by the image forming element using the light emitted from the light tunnel, projecting the image formed by the image forming element, and displaying the image, and the light source unit, In the image display projector including the housing for storing the image forming unit, the projection lens has a protective cap that covers the front surface of the projection lens, and the housing releases the outside air to release the heat generated inside the housing. An intake port to be taken in and an exhaust port that absorbs heat and exhausts warmed outside air to the outside of the housing are provided inside the intake port and the exhaust port. The shutter mechanism for opening and closing the fine outlet, further comprising a protective cap, after mounting the projection lens, is rotatably formed, the shutter mechanism is configured to open and close with the rotation of the protective cap.

  According to this configuration, the shutter mechanism is provided at the air intake port for sucking outside air into the main body of the image display projector and the exhaust port for discharging warmed outside air to the outside of the main body. When the image display projector is not used, the shutter mechanism is closed by rotating a protective cap that protects the lens attached to the projection lens. Therefore, when the image display projector is not used, that is, during storage, it is possible to prevent dust and the like from entering the main body from the intake and exhaust ports.

  Further, in the present invention, each of the intake port and the exhaust port includes a plurality of opening windows, and the shutter mechanism includes a shutter portion including a plurality of shutter pieces corresponding to the opening windows and a connecting portion that connects these shutter pieces, The shutter part is formed from transmission means for transmitting the rotation of the protective cap to the shutter part, and the shutter piece is pivotally supported by the rotation shaft and is formed to open and close the opening window by rotating with respect to the opening window. .

  According to this configuration, the intake port and the exhaust port are formed from a plurality of opening windows, and each opening window is formed so as to open and close the opening window by rotating the shutter piece supported by the rotation shaft. Has been. Therefore, the intake port and the exhaust port can be arranged at positions where the inside of the main body can be effectively cooled, and can be set to a desired (minimum necessary) number, which is convenient.

  In the present invention, each of the intake port and the exhaust port includes a plurality of opening windows, and the shutter mechanism includes a comb-shaped shutter portion in which a slit is formed in a portion corresponding to the opening window, and a protective cap on the shutter portion. The shutter part is formed so as to open and close the opening window by sliding with respect to the opening window.

  According to this configuration, the shutter mechanism that opens and closes the opening window is formed from a comb-like shutter portion in which a slit is formed in a portion corresponding to the opening window, and the shutter portion is formed to slide with respect to the opening window. Has been. Therefore, the occupied area including the range in which the shutter portion moves is extremely small, and this type of image display projector can be reduced in size, which is convenient.

  Further, in the present invention, the protective cap has a protrusion on the outer peripheral portion thereof, the transmission means is formed so that the protective cap can be inserted, and a rotating ring having an engagement groove that engages with the protrusion, It consists of a connecting tool that connects the rotating ring and the shutter part. By attaching a protective cap to the rotating ring and turning it, the rotating ring rotates, and the shutter part is opened and closed via the connecting tool with this rotation. To be configured.

  According to this configuration, the protective cap has a protrusion on the outer periphery thereof, and is formed so as to engage with the engaging groove formed in the rotating ring of the transmission means. When the shutter is closed, the protective cap does not come off easily, so it is possible to protect the projection lens and prevent dust and other dust from entering the main unit through the intake and exhaust ports during storage. convenient.

  In the present invention, at least a part of the shutter piece is configured to function as a guide wall for guiding outside air when the protective cap is removed from the projection lens and the opening window is opened.

  According to this configuration, when the opening window is opened, that is, when using this type of image display projector, the shutter piece functions as a guide wall for guiding outside air, so that the inside of the main body can be effectively cooled. Can be convenient.

  In the present invention, the shutter mechanism further includes a slide portion having a slide groove to which an upper portion and / or a lower portion of the comb-shaped shutter portion can be attached, and the shutter portion is slidably attached to the slide groove, By sliding the shutter portion with respect to the opening window, the opening window is formed to open and close.

  According to this configuration, the comb-shaped shutter portion is mounted in the slide groove of the slide portion, and is formed to open and close the opening window by sliding with respect to the opening window. Therefore, the comb-shaped shutter portion can be opened and closed very smoothly, which is convenient.

  Further, in the present invention, the coupling tool is formed by a linear member and is wound around the outer periphery of the rotating ring as the rotating ring rotates.

  According to this configuration, the coupling tool is formed by a linear member, and opens and closes the shutter portion by being wound around the outer periphery of the rotating ring as the rotating ring rotates. Therefore, it is not particularly necessary to employ a special link mechanism for opening and closing the shutter portion, which is convenient.

  According to the present invention, it is possible to obtain an image display projector that can prevent dust and the like from entering the inside of the main body while storing this kind of image display projector.

(First embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of an example of an image display projector according to an embodiment of the present invention, and FIG. 2 is a top view of a cross section of a part of the image display projector shown in FIG. 3 is a top cross-sectional view of the main part of the image display projector shown in FIG. 2, FIG. 4 is a side cross-sectional view showing the main part of the exhaust port part shown in FIG. 3, and FIG. FIG. 6 is a side sectional view of FIG. 5, and FIG. 7 is a side view showing an example of a protective cap.

  An image display projector 1 shown in FIGS. 1 and 2 includes a main printed circuit board in which a light source unit 2, an image forming unit 3, and a control unit (not shown) for controlling the image display projector 1 are mounted in a housing 11. It is configured to store P. The light source unit 2 is composed of a lamp, a reflector, and the like, and emits light that is controlled by control means based on image data from a reproduction device such as a personal computer, an optical disk, or a video camera. As this lamp, for example, a lamp that emits white light is used.

  The image forming means 3 forms an image by the image forming element 31 using the light emitted from the light source unit 2, and projects and displays the image formed by the image forming element 31 on a screen or the like (not shown) by the projection lens 32. Let The image forming unit 3 includes a color filter 33, a light tunnel 34, a lens group 35, a printed circuit board 36, and a reflection mirror 37 in addition to the image forming element 31 and the projection lens 32 described above.

  The image forming element 31 modulates the light emitted from the light source unit 2 to form an image. For example, the image forming element 31 is mounted on the printed circuit board 35. As the image forming element 31, for example, a liquid crystal plate, DMD (Digital Micro Mirror Device), LCOS (Liquid Crystal on Silicon), or the like can be used. For example, in the DMD, an image forming surface is configured by arranging a large number of micromirrors in a matrix, and the angle of each micromirror is controlled by a signal from a control means (not shown), thereby forming an image forming surface. An image is formed by reflecting light irradiated on each micromirror.

  The color filter 33 colors the light emitted from the light source unit 2. The color filter 33 rotates around the rotation shaft 33 a and has four filters of red, green, blue, and white (transparent) in the rotation direction. It has an arranged configuration. The light emitted from the light source unit 2 passes through the rotating color filter 33 and is time-sequentially arranged into four colors of red, green, blue, and white (transparent).

  The light tunnel 34 has a light guide path formed by the inner surface thereof, light that has passed through the color filter 33 is incident thereon, and the light that has been colored by the color filter 33 is made uniform and emitted. The lens group 35 forms an image of the light emitted from the light tunnel 34 on the image forming element 31. The reflection mirror 37 reflects light that has passed through the lens group 35 and guides it to the image forming element 31.

  The projection lens 32 is for projecting light reflected by the image forming element 31, that is, an image formed by the image forming element 31, at a position facing the image projection opening 11 a provided in the housing 11. Has been placed.

  With this configuration, the image projection light emitted from the light source unit 2 is colored by the color filter 33 and uniformized by the light tunnel 34, and the light is reflected by the reflection mirror 37 and guided to the image forming element 31. An image is formed by the image forming element 31. Then, the reflected light from the image forming element 31, that is, the image formed by the image forming element 31 is projected onto a screen or the like from the projection lens 32. Thereby, the user can view a desired image.

  Thus, according to the present invention, the protective cap 4 is detachably attached to the front surface of the projection lens 32. As shown in FIG. 7, the protective cap 4 has, for example, two protrusions 41 provided on the outer periphery thereof, and is formed so as to be rotatable after being attached to the projection lens 32. In addition, the housing 11 is provided with an intake port 12 for taking in outside air to release heat generated therein, and an exhaust port 13 for absorbing heat and exhausting the warmed outside air to the outside of the housing 11. It has been. The intake port 12 and the exhaust port 13 are each formed of a plurality of opening windows 12a and 13a.

  A shutter mechanism 5 that opens and closes the intake port 12 and the exhaust port 13 is provided inside the intake port 12 and the exhaust port 13. The shutter mechanism 5 is configured to open and close as the protective cap 4 rotates. In the present embodiment, the shutter mechanism 5 is, for example, as shown in FIGS. 3 and 4, a shutter unit including a plurality of shutter pieces 51 corresponding to the opening windows 12 a and 13 a and a connecting part 52 that connects these shutter pieces 51. 53 and a transmission means 6 that transmits the rotation of the protective cap 4 to the shutter portion 53. The shutter piece 51 is pivotally supported by a rotation shaft 51a, and is configured to open and close the opening window 13a (12a) by rotating with respect to the opening window 13a (12a). Each shutter piece 51 has, for example, a lever 51b and is connected by a connecting member 5 made of a linear member such as a wire.

  In addition, at least a part of the shutter piece 51 has a region in which outside air is desired, for example, the light source unit 2 or the light tunnel 34 when the protective cap 4 is removed from the projection lens 32 and the opening windows 12a and 13a are opened. You may comprise so that it may function as a part of guidance wall which guides to a direction. According to this configuration, when the opening windows 12a and 13a are opened, that is, when this kind of image display projector 1 is used, the shutter piece 51 functions as a guide wall for guiding outside air. This is convenient and can be cooled.

  As shown in FIGS. 5 and 6, the opening / closing means 6 covers the protrusion 2, is rotatable, is formed so that the protective cap 4 can be inserted, and engages with the protrusion 41 of the protective cap 4. The rotating ring 61 includes an engaging groove 61 a and a connecting tool 62 having one end connected to the rotating ring 61 and the other end connected to the shutter portion 53. Then, by rotating the protective cap 4 between the rotating ring 61 and the projection lens 32 and rotating, the rotating ring 61 also rotates, and the shutter unit 53 is connected via the coupling tool 62 along with this rotation. It is configured to open and close. In the present embodiment, the connecting tool 62 is made of a linear member such as a wire, for example, and a part of the connecting tool 62 is wound around the outer periphery of the rotating ring 61 as the rotating ring 61 rotates. 62 is configured to move toward the rotary ring 61 and close the shutter portion 53. Further, as shown in FIG. 2, in order to open and close the shutter portion 53 on the side of the air inlet 12 provided on a different surface from the projection lens 32, a direction change pulley 63 is provided at the corner portion, and the connection tool 62 is moved. The direction may be changed.

  In a state where the protective cap 4 is not attached to the projection lens 32, that is, in a used state, the shutter portion 53 is opened by the biasing means such as a spring (not shown) so that the opening windows 12a and 13a are opened. The intake port 12 and the exhaust port 13 exhibit their functions sufficiently. In addition, when the protective cap 4 is mounted between the rotary ring 61 and the projection lens 32 and the shutter unit 53 is closed, the shutter unit 53 is locked so that the shutter unit 53 is not opened by the biasing means such as the spring described above. A mechanism (not shown) is preferably provided.

  In addition, although not shown, it is needless to say that an air blowing means such as an intake / exhaust fur and / or a blower may be provided in order to intake and exhaust outside air inside the main body. Of course, as the connection tool 62, for example, the connection member 52 described above may be extended to the opening / closing means 6 side, that is, the rotating ring 61 side so as to also serve as the connection tool 62. In addition, although not shown, it is of course possible to form a guide groove for guiding the connector 62 on the outer periphery of the rotating ring 61 so that winding can be performed smoothly.

  With the above configuration, for example, when the image display projector 1 is used and then stored, the projection 41 is engaged with the engagement groove 61a between the projection cap 32 and the rotation ring 61 when the protective cap 4 is stored. They are mounted so as to fit with each other and rotate in a predetermined direction, for example, clockwise in FIG. As a result, the rotating ring 61 is also rotated at the same time, and the connecting tool 62 is wound around the rotating ring 61. Accordingly, the shutter portion 53 can be closed against the urging means (not shown).

  According to the present embodiment having the above-described configuration, the shutter mechanism 5 is provided in the air inlet 12 that sucks outside air into the main body of the image display projector 1 and the air outlet 13 that exhausts warmed outside air to the outside of the main body. Yes. When the image display projector 1 is not used, the shutter mechanism 5 is closed by rotating the protective cap 4 that protects the lens attached to the projection lens 32. Therefore, when the image display projector 1 is not used, that is, during storage, dust and the like can be prevented from entering the main body from the air inlet 12 and the air outlet 13.

  In addition, according to the present embodiment, the intake port 12 and the exhaust port 13 are formed of a plurality of opening windows 12a, 13a, and each opening window 12a, 13a is rotated by a shutter piece 51 pivotally supported by a rotating shaft 51a. By doing so, the opening windows 12a and 13a are formed to open and close. Therefore, the intake port 12 and the exhaust port 13 can be arranged at a position where the inside of the main body can be effectively cooled, and the necessary minimum number can be conveniently provided.

  Further, according to the present embodiment, the protective cap 4 has the protrusion 41 on the outer peripheral portion thereof, and is formed so as to engage with the engaging groove 61 a formed in the rotating ring 61 of the opening / closing means 6. Therefore, when the protective cap 4 is attached and the shutter portion 53 is closed, the protective cap 4 cannot be easily removed. Therefore, during storage, the projection lens 32 is protected and dust is introduced into the main body from the air inlet 12 and the air outlet 13. It is possible to prevent intrusion of dust such as, which is convenient.

  Furthermore, according to the present embodiment, the coupling tool 62 is formed of a linear member, and opens and closes the shutter portion 53 by being wound around the outer periphery of the rotating ring 61 as the rotating ring 61 rotates. . Therefore, it is not particularly necessary to employ a special link mechanism for opening and closing the shutter portion 53, which is convenient.

(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. FIG. 8 is a front view showing the relationship between the shutter mechanism and the transmission means used in the image display projector according to the second embodiment of the present invention, FIG. 9 is a front view showing the shutter mechanism shown in FIG. 8, and FIG. FIG. 11 is a top sectional view showing a state in which the shutter mechanism is opened, and FIG. 11 is a top sectional view showing a state in which the shutter mechanism is closed. In FIGS. 8 to 11, the portions denoted by the same reference numerals as those in FIGS. 1 to 7 described above are substantially the same, and detailed description thereof is omitted here. Hereinafter, the difference from the above-described first embodiment will be mainly described.

  In the present embodiment, as shown in FIGS. 8 to 11, the shutter mechanism is a comb-shaped shutter portion 53 formed by connecting a plurality of shutter pieces 51 with a connecting portion 52 at the lower end. . The comb-shaped shutter portion 53 can be manufactured, for example, by forming a slit 54 in a portion corresponding to the opening window 13a (12a) from a rectangular material. And the slide part 7 which has the slide groove | channel 71 is arrange | positioned at the upper and lower sides of this comb-shaped shutter part 53, the comb-shaped shutter part 53 is mounted | worn so that sliding is possible, and the comb-shaped shutter part 53 is attached to the opening window 13a ( The opening window 13a (12a) is formed to open and close by sliding with respect to 12a). As in the first embodiment described above, the transmission means 6 includes a rotating ring 61 and a connector 62 having one end connected to the rotating ring 61 and the other end connected to a comb-shaped shutter portion 53. Yes.

  As the slide portion 7, for example, even if the slide groove 71 is formed using a “U” -shaped member in a cross section, or an “L” -shaped member or a plate-like member is used in the cross section, Of course, the slide groove 71 may be formed between the inner wall surface and the inner wall surface.

  With the above configuration, for example, when the image display projector 1 is used and then stored, the projection 41 is engaged with the engagement groove 61 a between the protection cap 4 and the projection ring and the rotation ring 61. They are mounted so as to fit with each other and rotate in a predetermined direction, for example, clockwise in FIG. As a result, the rotating ring 61 is also rotated at the same time, and the connecting tool 62 is wound around the rotating ring 61. Accordingly, the comb-shaped shutter portion 53 slides in the slide groove 71, and the opening window 13a in FIG. (12a) The open state can be changed to the closed state of FIG.

  According to the present embodiment configured as described above, the shutter mechanism 5 that opens and closes the opening windows 12a and 13a forms the slit 54 in the portion corresponding to the opening windows 12a and 13a, in addition to the same effects as the above-described embodiment. The shutter portion 53 is formed so as to slide with respect to the opening windows 12a and 13a. Therefore, the occupied area including the range in which the shutter unit 53 moves is extremely small, and this type of image display projector can be reduced in size, which is convenient.

  Furthermore, according to the present embodiment, the comb-shaped shutter portion 53 is mounted in the slide groove 71 of the slide portion 7, and opens and closes the opening windows 12a and 13a by sliding with respect to the opening windows 12a and 13a. It is formed as follows. Therefore, the comb-shaped shutter portion 53 can be opened and closed very smoothly, which is convenient.

  Each embodiment described above is a preferred example of the present invention, but the present invention is not limited to this, and various modifications can be made without departing from the scope of the present invention.

1 is a perspective view illustrating a schematic configuration of an example of an image display projector according to an embodiment of the present invention. It is the top view which carried out the cross section of a part of image display projector shown in FIG. FIG. 3 is a top cross-sectional view of a main part of the image display projector shown in FIG. 2. It is side surface sectional drawing which shows the principal part of the exhaust port part shown in FIG. It is a front view which shows the relationship between a protective cap and a transmission means. It is side surface sectional drawing of FIG. It is a side view which shows an example of a protective cap. It is a front view which shows the relationship between the shutter mechanism and transmission means which are used for the image display projector which concerns on 2nd Embodiment of this invention. It is a front view which shows the shutter mechanism shown in FIG. It is a top surface sectional view showing the state where the shutter mechanism was opened. It is a top surface sectional view showing the state where the shutter mechanism was closed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Image display projector 11 Housing | casing 12 Intake port 12a Opening window 13 Exhaust port 13a Opening window 2 Light source unit 3 Image forming means 31 Image forming element 32 Projection lens 4 Protection cap 41 Protrusion part 5 Shutter mechanism 51 Shutter piece 51a Rotating shaft 52 Connection Part 53 Shutter part 54 Slit 6 Transmission means 61 Rotating ring 61a Engaging groove 62 Connecting tool 7 Slide part 71 Slide groove

Claims (7)

A light source unit that emits light for image projection, a light tunnel having a light guide that guides the incident light, and the light emitted from the light tunnel. An image forming unit having a projection lens that forms an image by the image forming element, projects an image formed by the image forming element, and displays the image, and a housing that houses the light source unit and the image forming unit. In the image display projector provided,
The projection lens has a protective cap that covers the front surface thereof, the casing has an intake port for taking in outside air to release heat generated inside the casing, and the outside air that has been heated and absorbed by the heat. And a shutter mechanism for opening and closing the intake port and the exhaust port inside the intake port and the exhaust port, and the protective cap is attached to the projection lens. An image display projector that is configured to be rotatable after being mounted, and wherein the shutter mechanism is configured to open and close with the rotation of the protective cap.   The intake port and the exhaust port each include a plurality of opening windows, and the shutter mechanism includes a shutter portion including a plurality of shutter pieces corresponding to the opening windows and a connecting portion for connecting the shutter pieces, and the shutter portion. The shutter piece is pivotally supported by a rotating shaft, and is configured to open and close the opening window by rotating with respect to the opening window. The image display projector according to claim 1, wherein:   Each of the intake port and the exhaust port includes a plurality of opening windows, and the shutter mechanism includes a comb-shaped shutter portion in which a slit is formed in a portion corresponding to the opening window, and the protective cap is rotated on the shutter portion. The image according to claim 1, wherein the shutter unit is formed to open and close the opening window by sliding with respect to the opening window. Display projector.   The protective cap has a protrusion on an outer periphery thereof, and the transmission means is formed so that the protective cap can be inserted, and a rotating ring having an engaging groove that engages with the protruding portion, and the rotating ring The rotating ring is rotated by attaching the protective cap to the rotating ring and rotating, and the rotating ring rotates with the rotation of the rotating ring. The image display projector according to claim 1, wherein the image display projector is configured to open and close the unit.   At least a part of the shutter piece is configured to function as a guide wall for guiding the outside air when the protective cap is removed from the projection lens and the opening window is opened. Item 3. The image display projector according to Item 2.   The shutter mechanism further includes a slide part having a slide groove into which an upper part and / or a lower part of the comb-like shutter part can be attached, and the shutter part is slidably attached to the slide groove. The image display projector according to claim 3, wherein the image display projector is configured to open and close the opening window by sliding with respect to the opening window.   5. The image display projector according to claim 4, wherein the connector is formed of a linear member and is configured to be wound around an outer periphery of the rotating ring as the rotating ring rotates.