JP2009048155A - Projection image display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection image display device by which the use efficiency of a room is not decreased and residents do not feel a pressure, not only when not in use but also when in use. <P>SOLUTION: The projection image display device includes: a main body section 3 which modulates light emitted from a light source, based on an image signal and projects the light, to display an image; a housing 4 which stores the main body section 3 and is installed under the roof and under the floor, so as to cover a ceiling board R1 against a wall W and an opening R2 formed in a floor board by one surface thereof; a projection window 5 which is formed in one surface 4a covering the opening R2, in the housing 4; and an optical path changing means (concave surface reflecting mirror 6) which changes the optical path of image light I projected from the main body section 3 toward the surface of the wall W through the projection window 5. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projection display apparatus such as a liquid crystal projector, and more particularly to installation thereof.

  Projection-type image display devices such as liquid crystal projectors project images by modulating light emitted from a light source such as an ultra-high pressure mercury lamp on the basis of a video signal by a light modulation means such as a liquid crystal panel, and the like. Is displayed in an enlarged manner.

  Conventionally, when installing such a projection display apparatus as described above, generally, as shown in FIG. 7, a floor installation method in which the apparatus main body 100 is installed on a mounting table 101 arranged on the floor surface, as shown in FIG. As described above, the ceiling hanging method is used in which the apparatus main body 100 is suspended from the ceiling by the hanging metal fittings 102.

  However, in the floor installation method using the conventional table (FIG. 7) described above, a frequently used part other than the peripheral part of the room is occupied, and there is a problem that the use efficiency of the room is greatly impaired.

  In order to solve this problem, the ceiling hanging method using the hanging metal fittings (FIG. 8) is used. In this case, although the problem of reduction of the floor area is solved, the projection type image protruding from the ceiling is used. The feeling of oppression by the display device is more than expected, and a new problem of greatly impairing the comfort and space has arisen, and the solution of these problems has been an issue.

In order to solve such a problem, Patent Document 1 discloses that a plurality of columns are suspended by using a main structure that is above the roof or ceiling of a building as a support, and expansion and contraction directions are provided at both front and rear ends of the column. Disposed above and below is a slide rail in which one end is fixed to the column and the other end is fixed to a substantially box-shaped sheath having an opening upward, and the support and the sheath are connected by a lifting device, It has been proposed that a projector suspension be provided near the top of the sheath body and a decorative cover fitted to the ceiling opening should be provided at the lower end. To avoid feeling uncomfortable pressure.
Japanese Patent Laid-Open No. 3-83466

  However, since the thing of the said patent document 1 can be stored in a ceiling back when not in use, it can prevent a resident from feeling uncomfortable pressure, but in use, a larger structure is suspended from the ceiling. Since it can be lowered, it makes the user feel a greater sense of pressure than ever before.

  Therefore, the present invention has been made to solve such a problem, and the projection type image in which the use efficiency of the room is not lost or the feeling of pressure is not felt not only when not in use but also in use. The object is to provide a display device.

  In order to achieve the above object, the invention according to claim 1 of the present application is directed to a main body that displays an image by modulating and projecting light emitted from a light source based on a video signal, and the main body. And a housing installed under the ceiling or under the floor so as to block the opening formed in the ceiling plate or floor plate with one surface, and a projection window formed on the surface of the housing that closes the opening And an optical path changing means for bending the optical path of the image light projected from the main body and changing the optical path in the projection plane direction so as to pass through the projection window.

  According to a second aspect of the present invention, the optical path changing means changes the optical path of the image light projected from the main body in the casing installed under the ceiling or under the floor in the wall direction to the wall surface through the projection window. It is characterized by comprising.

  The invention according to claim 3 is characterized in that the optical path changing means comprises a concave reflecting mirror.

  The invention according to claim 4 is characterized in that the optical path changing means is composed of a convex lens having a large aperture, and the convex lens is installed shifted to one side with respect to the optical axis of the image light projected from the main body. To do.

  The invention according to claim 5 is characterized in that transparent glass is attached to the projection window.

  The invention according to claim 6 is characterized in that the casing is formed with a flange portion that covers the periphery of the opening portion so as to be continuous with one surface closing the opening portion.

  The invention according to claim 7 is characterized by comprising an openable / closable lid capable of opening and closing one surface closing the opening.

  The invention according to claim 8 is characterized in that the main body is attached to the inside of the opening / closing lid.

  The invention according to claim 9 is characterized in that the open / close lid is configured to be openable and closable by pivotally supporting one end portion of one surface that closes the opening from both sides.

  The invention according to claim 10 is characterized by having a ceiling hanger that is used when the casing is installed on the ceiling.

  The invention according to claim 11 is characterized in that it has a mounting base used when the casing is installed under the floor.

  According to the present invention, since the image can be enlarged and displayed through the projection window while being installed behind the ceiling or under the floor, the use efficiency of the room is impaired not only when not in use but also in use. , You won't feel pressure.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a vertical cross-sectional view showing a configuration of a main part of a liquid crystal projector unit which is an embodiment of a projection display apparatus according to the present invention, and shows a state when the ceiling is installed.

  The liquid crystal projector unit 1 according to the present embodiment modulates light emitted from a light source such as an ultra-high pressure mercury lamp (not shown) based on a video signal on a liquid crystal panel, and projects the image through a projection lens 2 to enlarge an image. The main body 3 to be displayed, the housing 4 that houses the main body 3 and is installed on the back of the ceiling so as to block the opening R2 formed in the ceiling plate R1 at the time of the wall W with one surface 4a, and the housing A projection window 5 formed on one surface 4a of the body 4 that closes the opening R2, and a concave reflecting mirror 6 that changes the optical path of the image light I projected from the main body 3 in the direction of the wall surface through the projection window 5. ing.

  The main body 3 housed in the housing 4 is fixed to the surface 4b facing the surface 4a that closes the opening R2 of the ceiling plate R1 with the projection lens 2 screwed toward the side opposite to the wall W. As the main body 3, the current liquid crystal projector can be used almost as it is. In addition, although each said surface 4a, 4b is a lower surface and an upper surface in FIG. 1, since it turns upside down at the time of underfloor installation mentioned later, the surface 4a which closes opening R2 of ceiling board R1 is called an opening obstruction | occlusion surface, and a main body The surface 4b to which the portion 3 is attached is referred to as a main body portion attachment surface.

  On the other hand, the concave reflecting mirror 6 as the optical path changing means is disposed in a slightly downwardly inclined position in front of the projection lens 2 of the main body unit 3 and enables an extreme drop (optical path change) as shown in FIG. Thus, the reflecting surface 6a is configured. A configuration for enlarging and displaying a projected image on a screen (not shown) installed on the wall W without causing trapezoidal distortion or the like even in such an extreme drop is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-258620. It can be realized relatively easily by adapting such existing technology to this embodiment.

  The projection window 5 has a small opening because the optical path of the image light I from the main body 3 is extremely lowered by the concave reflecting mirror 6 as described above, and is attached to the projection window 5. A transparent glass 8 is mounted using the frame 7.

  Further, the casing 4 is formed with a flange 4c that covers the periphery of the opening R2 of the ceiling plate R1 so as to be continuous with the opening closing surface 4a. Thereby, even if the opening R2 of the ceiling plate R1 is not formed with high accuracy, the periphery of the opening R2 is covered with the flange portion 4c, thereby preventing the opening R2 from being seen from below and deteriorating the appearance. Can do. Further, by fixing the essential part of the flange portion 4c to the ceiling plate R1 with screws or the like, it can be securely attached without a gap.

  Further, the opening closing surface 4a is configured by an opening / closing lid that is pivotally supported from both sides so that one end of the wall W side can be pivoted from both sides, and can be opened and closed as shown in FIG. An engaging means (not shown) that can be fixed in the closed state as shown in FIG. 1 is provided.

  As described above, the casing 4 has the flange 4c fixed to the periphery of the opening R2 of the ceiling plate R1 with screws or the like. However, in order to improve safety, the casing 4 is provided with a turnbuckle 9 provided as a ceiling hanger. It is suspended from the ceiling R3. The turnbuckle 9 has a nut portion having a right-hand thread and a left-hand thread on the both ends of the body frame 9a, and one end of bolts 9b and 9c of the left-hand thread is screwed on one of them. The tension can be adjusted by changing the distance between the bolts 9b and 9c by rotating the body frame 9a. Note that nut portions 4d and R4 to which the other ends of the bolts 9b and 9c are attached are provided on the body portion attachment surface 4b of the housing 4 and the main ceiling R3. As a result, safety is improved and the height position at which the housing 4 is suspended can be easily adjusted.

  Although not shown, the main body 3 is provided with a cooling mechanism, and the intake and exhaust ports are also provided in the housing 4 in communication with the intake and exhaust ports. It is preferable that air is taken in and out through the surface 4a and the ceiling board R1 from the indoor side where temperature management is easy.

  FIG. 3 is a longitudinal sectional view showing a state of the liquid crystal projector unit 1 when installed under the floor. The same reference numerals are used for the same parts as those in FIG.

  In FIG. 3, the liquid crystal projector unit 1 in which the main body 3 and the concave reflecting mirror 6 are accommodated in the housing 4 is the same as that in FIG. 1, but the floor plate F1 at the wall W is turned upside down. The opening F2 formed at the bottom is installed under the floor so as to be closed by the opening closing surface 4a as described above.

  Even at the time of installation under the floor, the essential part of the flange portion 4c of the housing 4 is fixed to the periphery of the opening F2 of the floor board F1 with screws or the like, and is firmly fixed without a gap. 10 is mounted. The mounting table 10 is configured such that the leg portion 10a can be continuously height-adjusted by a slide-type adjusting mechanism (not shown), thereby improving safety and easily adjusting the height position of the housing 4. Can be done.

  In the case of this underfloor installation, the image light I from the main body 3 is extremely launched by the concave reflecting mirror 6 as shown in FIG. 3, but since the reflecting surface 6a is configured as described above, the wall W The projected image can be enlarged and displayed on the screen (not shown) installed in the screen without causing trapezoidal distortion or the like.

  As described above, according to the present embodiment, an image can be enlarged and displayed through the projection window 5 while the liquid crystal projector unit 1 is installed behind the ceiling or under the floor. Even at times, the use efficiency of the room is not lost or the feeling of pressure is not felt.

  Further, the optical path of the image light I projected from the main body 3 in the housing 4 installed under the ceiling or under the floor of the wall W is changed to the wall W surface direction through the projection window 5. Therefore, the projection window 5 that appears as an opening on the ceiling surface or floor surface can be made small.

  Further, since the transparent glass 8 is attached to the projection window 5, dust and the like can be prevented from entering the housing 4 in which the main body 3 and the concave reflecting mirror 6 are accommodated, thereby reducing the number of maintenance times. can do.

  Furthermore, the opening closing surface 4a that closes the openings R2 and F2 of the ceiling plate R1 and the floor plate F1 in the housing 4 is configured by an openable opening / closing lid, so that the opening / closing lid (opening closing surface) 4a is opened. Since maintenance can be performed, maintenance becomes easy.

  FIG. 4 is a longitudinal cross-sectional view showing a configuration of a main part of a liquid crystal projector unit which is another embodiment of the projection display apparatus according to the present invention, and shows a state when the ceiling is installed here. The same reference numerals as those in the above-described embodiment indicate the same or corresponding parts.

  The liquid crystal projector unit 1 of the present embodiment also modulates light emitted from a light source such as an ultra-high pressure mercury lamp (not shown) based on the video signal on the liquid crystal panel and projects it through the projection lens 2 in the same manner as the previous embodiment. The main body 3 for enlarging and displaying the image, and the ceiling so that the main body 3 is accommodated and the opening R2 formed in the ceiling plate R1 in the case of the wall W is covered with one surface (opening closing surface) 4a. The housing 4 installed on the back, the projection window 5 formed on the opening closing surface (opening / closing lid) 4a of the housing 4, and the optical path of the image light I projected from the main body 3 is projected on the projection window 5 And a concave reflecting mirror 6 which changes in the direction of the wall surface.

  By the way, in the liquid crystal projector unit 1 of the embodiment shown in FIGS. 1 to 3, the main body 3 is fixed to the casing surface 4b on the back of the ceiling or under the floor, and the main body 3 can be opened even when the opening / closing lid 4a is opened during maintenance. The part maintenance needs to be performed by putting a hand in the narrow space between the main body part 3 and the housing 4.

  Therefore, in the present embodiment, as shown in FIG. 4, the main body 3 housed in the housing 4 is screwed to the opening closing surface that closes the opening R2 of the ceiling plate R1, that is, inside the opening / closing lid 4a. I try to fix it. In this case, the current liquid crystal projector can be used almost as it is as the main body 3, but the position of the main body 3 in the housing 4 is the same as that of the previous embodiment of the main body 3 so that the position of the main body 3 is the same as that of the previous embodiment. A nut portion 3c longer than that in the above embodiment is formed on the opposite surface, and is firmly fixed with screws 3d from the outside of the opening / closing lid 4a. With this configuration, the arrangement of the projection window 5 and the concave reflecting mirror 6 can be the same as that of the above-described embodiment.

  The opening / closing lid (opening closing surface) 4a is configured such that one end side (wall W side) is pivotally supported from both sides so as to be rotatable and openable as shown in FIG. Is provided with engaging means (not shown) that can be fixed in the closed state as shown in FIG.

  The ceiling hanger (turn buckle 9) and the like are the same as those in the embodiment shown in FIGS. Moreover, since the state at the time of underfloor installation is the same as that of the embodiment shown in FIG. 3 except for the mounting structure of the main body 3 described above, the illustration is omitted.

  According to the present embodiment, the same operational effects as those of the above-described embodiment can be obtained, and when the main body 3 is attached to the inside of the opening / closing lid 4a, the opening / closing lid 4a is opened during maintenance as shown in FIG. Since the main body 3 attached to the inside of the open / close lid 4a appears outside the housing 4, the maintenance of the main body 3 is further facilitated, and the maintainability of the main body 3 can be improved. Furthermore, although the height of the ceiling is difficult to maintain, only the height of the main body 3 is lowered as shown in FIGS. 4 to 5 in the present embodiment. It becomes easy. Further, since the reflecting surface 6a side of the concave reflecting mirror 6 is also largely opened, the maintenance of the concave reflecting mirror 6 is further facilitated, and the maintainability of the concave reflecting mirror 6 can be improved.

  Further, since the opening / closing lid 4a is pivotably supported at both ends so that it can be opened and closed, even if the main body 3 is attached to the opening / closing lid 4a, rattling or looseness like a hinge occurs. Without this, the stability and safety of the open / close lid 4a are improved.

  In each of the above embodiments, the case where the concave reflecting mirror 6 is used as the optical path changing means when installed under the ceiling or under the floor is used. However, as shown in FIG. 6, a convex lens 11 having a large diameter is used. Even if the convex lens 11 is installed by shifting to one side with respect to the optical axis of the image light I projected from the main body 3 described above, the lens shift technology in the existing projector is fixedly adapted, It can be realized relatively easily.

  In addition, the projection display apparatus according to the present invention is not limited to a liquid crystal projector using a liquid crystal panel as a light modulation means, but the present invention is applied to a projection display apparatus having another image light generation system. Can do. That is, the present invention can be applied to a projector such as a DLP (Digital Light Processing; registered trademark of Texas Instruments (TI)) system.

The longitudinal cross-sectional view which shows the principal part structure at the time of ceiling back installation of the liquid-crystal projector unit which is one Embodiment of the projection type video display apparatus concerning this invention. Similarly, the longitudinal cross-sectional view which shows the state which open | released the opening part obstruction | occlusion surface (opening-closing lid) of the housing | casing of the said liquid-crystal projector unit. Similarly, the longitudinal cross-sectional view which shows the principal part structure at the time of underfloor installation. The longitudinal cross-sectional view which shows the principal part structure at the time of ceiling back installation of the liquid crystal projector unit which is other embodiment of the projection type video display apparatus concerning this invention. Similarly, the longitudinal cross-sectional view which shows the state which open | released the opening part obstruction | occlusion surface (opening-closing lid) of the housing | casing of the said liquid-crystal projector unit. Explanatory drawing of the convex lens used as other embodiment of an optical path change means. Explanatory drawing which shows the example of conventional installation. Similarly, an explanatory view showing another conventional installation example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Liquid crystal projector unit 2 Projection lens 3 Main-body part 3c Nut part 3d Bolt 4 Case 4a Opening obstruction | occlusion surface (opening-closing cover)
4b Body portion mounting surface 4c Flange portion 4d Nut portion 5 Projection window 6 Concave reflector 6a Reflecting surface 7 Mounting frame 8 Transparent glass 9 Turnbuckle 9a Body frame 9b, 9c Bolt 10 Mounting base 10a Leg portion 11 Convex lens W Wall R1 Ceiling plate R2 Opening R3 Main ceiling R4 Nut I Video light F1 Floor board F2 Opening

Claims (11)

  A main body that displays an image by modulating and projecting light emitted from a light source based on a video signal, and a ceiling that houses the main body and closes an opening formed in a ceiling panel or a floor panel. A housing installed under the floor or under the floor; a projection window formed on one surface of the housing that closes the opening; and an optical path of image light projected from the main body is bent so that the projection window is A projection display apparatus comprising: an optical path changing unit that changes the projection plane direction so as to pass through.   The optical path changing means is configured to change the optical path of the image light projected from the main body in the housing installed under the ceiling or under the floor near the wall in the direction of the wall surface through the projection window. The projection display apparatus according to claim 1.   3. The projection display apparatus according to claim 2, wherein the optical path changing means is a concave reflecting mirror.   3. The projection type according to claim 2, wherein the optical path changing means is composed of a convex lens having a large aperture, and the convex lens is installed shifted to one side with respect to the optical axis of the image light projected from the main body. Video display device.   5. The projection display apparatus according to claim 1, wherein transparent glass is attached to the projection window.   6. The projection according to claim 1, wherein a flange portion that covers the periphery of the opening is formed on the casing so as to be continuous with a surface that closes the opening. Type image display device.   7. The projection display apparatus according to claim 1, wherein one surface that closes the opening is configured by an openable / closable lid.   8. The projection display apparatus according to claim 7, wherein the main body is attached to the inside of the opening / closing lid.   9. The projection display apparatus according to claim 8, wherein the opening / closing lid is configured to be openable and closable by pivotally supporting one end portion of one surface closing the opening from both sides.   The projection display apparatus according to any one of claims 1 to 9, further comprising a ceiling hanger used when the casing is installed on a ceiling. The projection display apparatus according to any one of claims 1 to 10, further comprising a pedestal used when the casing is installed under the floor.

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