JP2008250252A - Image projection device, image projection system, and support post - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image projection device capable of satisfactory projection of images, to provide an image projection system, and a support post used for supporting the image projection device. <P>SOLUTION: The image projection device has a projecting section disposed in a housing and projects an image by using light irradiated from a light source, and is supported by the support post extending vertically. A through-hole is vertically made through the image projection device. A support post is inserted into the through-hole, and allows the image projection device to vertically move along the support post. The support post supports the image projection device at a prescribed height by inserting the support post into the through-hole, thereby engaging with the image projection device. The image projection system has this image projection device and this support post. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention supports an image projection apparatus that enlarges and projects an image on a predetermined screen, an image projection system that includes the image projection apparatus and a column that supports the image projection apparatus at a predetermined height, and an image projection apparatus. It is about a support.

  2. Description of the Related Art Conventionally, there has been known an image projection apparatus such as a projector that displays image data input from a computer apparatus or the like on a liquid crystal display element and irradiates light on the liquid crystal display element to project an image on a screen.

  This image projection apparatus is normally installed in front of the screen and projects an image toward the screen. In this case, the image projection device is installed near the lower end of the image projected on the screen or at a lower level so that the image projection device does not block the image projected on the screen. The front part is lifted to a predetermined inclination posture, and an image is projected obliquely upward.

  In order to make the image projecting device a stable tilt posture, the image projecting device is provided with a rod-like leg member that can be advanced downward at the approximate center of the front side edge of the main body or both sides of the front side edge. In many cases, the image projection apparatus is inclined by moving the leg member downward by a predetermined length.

In order to smoothly perform the advance operation of the leg member, the image projection apparatus is provided with an operation button that is pushed down by the thumb, and the lock mechanism that locks the leg member by the operation of the operation button is set to the released state. An image projection apparatus including an adjuster device that can be advanced with the leg member directed downward has also been proposed (see, for example, Patent Document 1).
JP 2004-054039 A

  Since such an image projection apparatus is used by being installed on the upper surface of a table, a support base, etc., the height of the projected image is limited by the height of the installation position, and the position adjustment with the screen is performed. Sometimes became difficult.

  In particular, when the image projection apparatus must be installed close to the screen, a large trapezoidal distortion may occur in the projected image due to a large tilt angle in the tilt posture of the image projection apparatus. Good projection may be difficult.

  The present invention has been made to solve the above-described problems, and provides an image projecting apparatus and an image projecting system that can favorably project an image, and a column used to support the image projecting apparatus. It is.

  The image projection apparatus according to claim 1 is an image projection apparatus that is disposed in a housing, has a projection unit that projects an image using light emitted from a light source, and is supported by a support column extending vertically. Therefore, a through-hole penetrating in the vertical direction is provided in the image projection apparatus, and the column is inserted into the through-hole so as to be movable in the vertical direction along the column.

  According to a second aspect of the present invention, in the image projection device according to the first aspect, the through hole is provided at or near the center of gravity of the image projection device.

  The image projection device according to claim 3 is the image projection device according to claim 2, further comprising a power supply circuit that supplies power to the light source and the projection unit, wherein the projection unit and the power supply circuit are connected to the through hole. Was placed between them.

  The image projecting device according to claim 4 is the image projecting device according to any one of claims 1 to 3, further comprising a heat radiating portion that is in contact with the support column and is made of a high thermal conductive material having high thermal conductivity. The heat inside the device was transferred to the support by the heat radiating part.

  According to a fifth aspect of the present invention, in the image projection device according to any one of the first to fourth aspects, the image projection device is turned upside down so that the through hole can be inserted into the support column.

  The image projection device according to claim 6 is the image projection device according to claim 5, wherein the projection unit includes image inverting means for inverting the image to be projected vertically and horizontally, respectively. When the image is inverted, the image projected by the image inversion means is inverted upside down.

  The image projection device according to claim 7, in the image projection device according to any one of claims 1 to 6, projects the image projected by the projection unit in a horizontal direction orthogonal to the support column. It was.

  The image projection device according to claim 8 is the image projection device according to any one of claims 1 to 7, further comprising a height holding unit configured to hold the image projection device at a predetermined height of the support column. It was.

  The image projecting device according to claim 9 is the image projecting device according to any one of claims 1 to 8, further comprising a rotation preventing means for preventing the image projecting device from rotating around the support column. .

  The image projection system according to claim 10, wherein the image projection apparatus includes a light source and a projection unit that projects an image using light emitted from the light source, and the image projection apparatus is extended in a vertical direction so that the image projection apparatus is predetermined. An image projection system including a support column supported at a height of the image projection device, wherein the image projection device is provided with a through-hole penetrating in the vertical direction, and the image projection device is inserted into the through-hole to insert the support column. It was possible to move in the vertical direction along the column.

  The support column according to claim 11 has a light source and a projection unit that projects an image using light emitted from the light source, and supports an image projection device having a through-hole that is provided to penetrate in the vertical direction. The image projection device is supported at a predetermined height by being inserted into and engaged with the through hole.

  According to a twelfth aspect of the present invention, the post according to the eleventh aspect includes an abutting portion that comes into contact with a screen on which the image is projected or a support of the screen.

  The support column according to claim 13 is the support column according to claim 11 or 12, wherein height support means for maintaining the image projection device at a predetermined height is provided.

  According to a fourteenth aspect of the present invention, in the post according to any one of the eleventh to thirteenth aspects, rotation prevention means for preventing the image projection device from rotating is provided.

  In the image projection device according to claim 1, a through-hole penetrating in the vertical direction is provided in the image projection device, and the column is inserted into the through-hole so that the image projection device is movable in the vertical direction along the column. As a result, the image can be projected by arranging the image projection device at a suitable height that satisfies a predetermined positional relationship with respect to the screen on which the image is projected, so that it is possible to suppress the occurrence of large trapezoidal distortion in the projected image. .

  In the image projecting device according to claim 2, by providing the through hole at or near the center of gravity of the image projecting device, the image projecting device can be stably attached to the support and can be moved up and down along the support. It can be performed stably and smoothly.

  In the image projection device according to claim 3, by arranging the power source circuit that supplies power to the light source and the projection unit, and the projection unit with the through hole interposed therebetween, it is possible to achieve a good weight distribution in the image projection device. In addition, the image projection apparatus can be stably mounted on the support column and can be moved up and down along the support column stably and smoothly.

  The image projection device according to claim 4 includes a heat radiating portion made of a high heat conductive material having high thermal conductivity in contact with the support, and the heat radiating portion transmits heat inside the device to the support, thereby Cooling efficiency can be improved.

  In the image projection device according to claim 5, the image projection device can be used by inverting the image projection device upside down by inverting the image projection device upside down so that the through hole can be inserted into the support column. The degree of freedom can be increased.

  The image projection device according to claim 6, wherein the projection unit includes image inverting means for inverting the image to be projected vertically and horizontally, and the image inverting means projects the image when the image projector is inverted vertically. By flipping the image to be upside down, the image projection apparatus can be turned upside down without considering the top and bottom of the projected image.

  In the image projection device according to claim 7, the image projection device can be disposed close to the screen on which the image is projected by projecting the image projected by the projection unit in the left-right direction orthogonal to the support column. The projection device can be prevented from obstructing the field of view.

  In the image projection device according to claim 8, by providing a height holding means for holding the image projection device at a predetermined height of the support column, it is possible to prevent the image from being shifted in the vertical direction during the image projection. .

  In the image projection device according to claim 9, by providing a rotation prevention unit that prevents the image projection device from rotating around the support column, it is possible to prevent the image from shifting in the horizontal direction during image projection. .

  The image projection system according to claim 10, wherein the image projection system includes a column that extends in the vertical direction and supports the image projection apparatus at a predetermined height, and the through-hole penetrates the image projection apparatus in the vertical direction. And the image projection device can be moved in the vertical direction along the support column by inserting a support column into the through hole, so that the image projection device satisfies a predetermined positional relationship with respect to the screen on which the image is projected. Since the image can be projected at a high height, it is possible to suppress the occurrence of a large trapezoidal distortion in the projected image.

  In the support column according to claim 11, in the support column that supports the image projection device having a through-hole that is vertically penetrated, the image projection device is inserted into the through-hole and engaged with the image projection device to a predetermined height. By supporting, it is possible to project an image by arranging the image projection device at a suitable height that satisfies a predetermined positional relationship with respect to the screen on which the image is projected, and a large trapezoidal distortion occurs in the projected image. It is possible to provide a controllable strut.

  In the support column according to the twelfth aspect of the present invention, the support column can be disposed at an appropriate position for projecting the image very easily by including the abutting portion that comes into contact with the screen on which the image is projected or the support of the screen.

  In the support column according to the thirteenth aspect, by providing the height holding means for holding the image projection apparatus at a predetermined height, it is possible to prevent the image from being shifted in the vertical direction during the image projection.

  In the support column according to the fourteenth aspect, by providing the rotation preventing means for preventing the image projection apparatus from rotating, it is possible to prevent the image from shifting in the left-right direction during the image projection.

  In the image projecting apparatus and the image projecting system of the present invention, as shown in FIG. 1, an image projecting apparatus 10 that projects a predetermined image on a screen S is mounted on a support column 20 that extends in the vertical direction. 10 is movable up and down along the column 20.

  The support column 20 is provided with a rectangular plate-like base 21 at the lower end, and is erected on the base 21. In particular, the base 21 is provided with a guide piece 22 that can be inserted into and removed from the front edge. As shown in the plan view of FIG. 2, the guide piece 22 is an abutting portion that is turned rightward by a screen S or a support body such as a wall H or a stand that supports the screen S, and the front edge of the guide piece 22 Is placed in contact with a support such as the screen S or the wall H, so that the base 21 can be placed at an appropriate position from the screen S.

  In particular, in this embodiment, the column 20 has a columnar shape, and the columnar column 20 is provided to face the column 20 with the column 20 interposed therebetween, and one column is in contact with the column 20 in the extending direction. A prismatic first projecting piece 20-1 and a second projecting piece 20-2 are provided. That is, the first projecting piece 20-1 and the second projecting piece 20-2 project in the radial direction from the support column 20 in opposite directions, and the first projecting piece 20-1 and the second projecting piece 20-2 A first rack surface 20-1R and a second rack surface 20-2R in which racks are formed along the vertical direction are provided on the surface facing the support column 20 (see FIG. 5). In this embodiment, the column 20 is cylindrical, but is not limited to a cylindrical shape, and may be a prismatic shape or the like.

  As shown in FIG. 3, the image projection apparatus 10 includes a light source 12 and a projection unit 13 that projects an image using light emitted from the light source 12 in a rectangular box-shaped housing 11. Furthermore, a power supply circuit 14 that supplies power to the light source 12 and the projection unit 13 and a control unit 15 that performs various controls are provided in the housing 11. The projection unit 13 is an LCD (Liquid Crystal Display) 13a that is irradiated with light that is emitted from the light source 12 and appropriately adjusted by the illumination optical system 16, and an image that magnifies and projects the light that has passed through the LCD 13a onto the screen S. An optical system 13b is provided (see FIG. 4).

  The casing 11 of the image projection apparatus 10 is provided with a through hole 30 penetrating the image projection apparatus 10 in the vertical direction at a predetermined position, and the column 20 is inserted into the through hole 30 portion, thereby the image projection apparatus 10 Can be attached to the column 20.

  In particular, the through-hole 30 is provided at or near the center of gravity of the image projection device 10. Therefore, when the image projection device 10 is mounted on the support column 20, the load of the image projection device 10 can be applied to the support column 20 along the extending direction of the support column 20. Therefore, the image without impairing the stability of the support column 20. The projection device 10 can be supported.

  Here, in the image projection device 10, by arranging the relatively heavy projection unit 13 and the power supply circuit 14 with the through hole interposed therebetween, the image projection device 10 has a good weight distribution, and the image projection device 10 While being able to be stably attached to the support column 20, the image projector 10 can be moved up and down along the support column 20 stably and smoothly.

  Note that a ballast 39 may be provided at a predetermined position in the housing 11 of the image projection apparatus 10 so that the through hole 30 is located at the center of gravity of the image projection apparatus 10.

  Here, the through hole 30 is inserted with a round hole portion through which the columnar column 20 is inserted, and a prismatic first protruding piece 20-1 and a second protruding piece 20-2 protruding from the column 20. A through hole 30 having a round hole portion and a square hole portion, and inserting a column 20 having a first protruding piece 20-1 and a second protruding piece 20-2, The first projecting piece 20-1 and the second projecting piece 20-2 serve as rotation stoppers to prevent the image projection apparatus 10 from rotating around the support column 20.

  As shown in FIG. 4, the control unit 15 includes a microcomputer 15a that performs various arithmetic processes, a video signal input circuit 15b that receives an input of a video signal through an input terminal (not shown), and the video signal input. A video processing circuit 15c that processes the video signal input to the circuit 15b based on a command from the microcomputer 15a, and an LCD drive circuit 15d that drives the LCD 13a based on the processing result in the video processing circuit 15c are provided. . In addition, the control unit 15 includes an image memory 15e that stores a processing result in the video processing circuit 15c or image data used for the processing, and further includes a light source driving circuit 15f that controls driving of the light source 12. .

  The microcomputer 15a of the control unit 15 includes a video processing circuit 15c, an LCD drive circuit 15d, an operation signal input by an operation means 17 such as a remote control device or an operation panel provided at a predetermined position of the housing 11. The light source drive circuit 15f and further the power supply circuit 14 are controlled.

  Further, as shown in FIG. 3, the image projection apparatus 10 includes a lifting motor 19 on which a gear 18 that engages with the first rack surface 20-1R or the second rack surface 20-2R of the support column 20 is mounted. . The lift motor 19 is controlled based on a lift drive circuit 15g controlled by the microcomputer 15a of the control unit 15 (see FIG. 4).

  Further, as shown in FIG. 3, the image projection apparatus 10 includes an engagement block body 31 having an engagement surface 31a that engages with the first rack surface 20-1R or the second rack surface 20-2R of the support column 20. Is provided at the tip of the rod 32. The actuator 33 is controlled based on a lock drive circuit 15h controlled by the microcomputer 15a of the control unit 15, and the engagement between the first rack surface 20-1R or the second rack surface 20-2R and the engagement block body 31 is controlled. By engaging the surface 31a, the vertical movement of the image projection device 10 is suppressed (see FIG. 4).

  In other words, the actuator 33 that operates the engagement block body 31 having the engagement surface 31a that engages with the first rack surface 20-1R or the second rack surface 20-2R causes the image projection device 10 to move to a predetermined position of the column 20. It is a height holding means for holding the height.

  When the image projection device 10 is mounted on the upper end of the column 20, as shown in FIG. 5, either the first rack surface 20-1R or the second rack surface 20-2R and the gear 18 are engaged. The image projection device 10 is lowered to a predetermined position along the support column 20 by driving the elevation motor 19 by the elevation drive circuit 15g.

  When the image projection device 10 reaches a predetermined height, a locking operation is performed by the operating means 17, whereby the engaging surface 31a of the engaging block body 31 is moved by the actuator 33 to the first rack surface 20-1R or the second rack surface. By engaging with 20-2R, the vertical movement of the image projection device 10 is prohibited, and the rotation of the image projection device 10 around the column 20 is prohibited. Therefore, the image projection device 10 does not swing during the image projection, and the projected screen can be prevented from swinging due to the swing of the image projection device 10.

  Note that the height holding means is not limited to the form using the actuator 33 with the engagement block body 31 mounted. For example, as shown in FIG. 6, the support frame 40 is mounted in a flange shape on the column 20. Further, by supporting the image projection apparatus 10 from below with the support frame 40, it is possible to provide height holding means.

  The support frame 40 includes a first block body 41 and a second block body 42 that sandwich the support column 20 from the left and right sides. The first block recess 41 a that fits the support column 20 is provided in the first block body 41. The second block body 42 is provided with a second fitting recess 42a for fitting with the support column 20.

  The first fitting recess 41a is provided with a first angular recess 41b that fits with the first protruding piece 20-1 protruding from the support column 20, and the second fitting recess 42a protrudes from the support column 20. The second angular recess 42b that fits into the second protruding piece 20-2 is provided, and the first angular recess 41b engages with the first rack surface 20-1R of the first protruding piece 20-1. An engaging surface is provided, and an engaging surface that engages with the second rack surface 20-2R of the second projecting piece 20-2 is provided in the second rectangular recess 42b, and the first block body 41 and the second block body are provided. When 42 is mounted on the support column 20, the first block body 41 and the second block body 42 can be maintained at a predetermined height of the support column 20 via the first rack surface 20-1R and the second rack surface 20-2R. It is said.

  In FIG. 6, reference numeral 43 denotes a plate-like connecting arm whose base end is rotatably attached to the second block body 42, and is engaged with an engaging protrusion 44 projecting from the first block body 41 at the distal end. The engaging block 45 is provided, and the engaging block 45 is engaged with the engaging protrusion 44 to integrally connect the first block body 41 and the second block body 42 via the connecting arm 43, thereby supporting the support frame. 40.

  As shown in FIG. 2, the image projection apparatus 10 mounted on the support column 20 covers the image projected by the projection unit 13 in the left-right direction orthogonal to the support column 20 by the imaging optical system 13 b. Therefore, the image projection device 10 can be installed on the side of the screen S, and the image projected on the screen S can be prevented from being blocked by the image projection device 10. In particular, in this case, since the image projected on the screen S is not obstructed by the image projector 10 regardless of the height of the image projector 10, the height of the image projector 10 can be arbitrarily set. In the present embodiment, the height is an intermediate height in the height direction of the image projected on the screen S. In other words, the image projection apparatus 10 performs the same enlarged projection in the vertical direction, thereby facilitating the design of the imaging optical system 13b.

  The support column 20 having the first projecting piece 20-1 and the second projecting piece 20-2 has a rotational symmetry of 180 °, and the through hole 30 provided in the housing 11 is also matched to this rotational symmetry. Due to the symmetrical shape, the through hole 30 can be inserted into the support column 20 even when the image projection device 10 is turned upside down. Therefore, the image projection device 10 can be installed on either side of the screen S as shown in FIG. Accordingly, the installation position of the image projection apparatus 10 can be selected.

  Here, as shown in FIG. 4, the control unit 15 is provided with a sensor such as a gravity sensor 15j or an inclination sensor for detecting the vertical direction of the image projection device 10, and based on the detection result by this sensor, The image projected on the screen S is adjusted.

  That is, in the control unit 15, when the gravity sensor 15j detects that the image projection device 10 is inverted and attached to the support column 20, the microcomputer 15a sends the image processing circuit 15c to the image processing circuit 15c and the LCD drive circuit 15d to the LCD 13a. A signal for processing the image data to output the image to be displayed upside down and horizontally reversed is displayed. This is image inverting means. Therefore, the user of the image projection device 10 can use it without worrying about the top and bottom of the image projection device 10.

  As shown in FIG. 3, a cooling fan 38 that cools the light source 12 that generates heat is provided inside the housing 11 of the image projection device 10. In order to increase the cooling effect of the image projection device 10, 30 can also be used.

  That is, one end of an appropriate heat pipe 37 is connected to the hood of the light source 12, or is disposed around the light source 12, while the other end of the heat pipe 37 is exposed to the through hole 30 so that the through hole 30 is formed. The cooling effect can be improved by dissipating heat through.

  Further, as shown in FIG. 8, a metal heat dissipating plate 45 curved in a concave shape along the peripheral surface of the through hole 30 is provided in the through hole 30 portion, and the heat dissipating plate 45 is provided with a through hole of the heat pipe 37. By connecting the end on the 30 side, the heat dissipation effect can be enhanced.

  In addition, the surface of the support column 20 is provided with a metal plate 25 that extends in the extending direction of the support column 20 at a position facing the heat dissipation plate 45, and heat is transferred to the metal plate 25 to transfer the heat of the heat dissipation plate 45 to the metal plate 25. By making the plate 25 function as a heat sink, the heat dissipation efficiency can be improved.

  At this time, it is desirable that the heat radiating plate 45 is in contact with the metal plate 25. In this embodiment, the heat radiating plate 45 is mounted on the support frame 46 that supports the heat radiating plate 45, and the support frame 46 is used for heat dissipation. The heat radiation plate 45 is brought into contact with the metal plate 25 by being attached to the tip of the rod 48 of the actuator 47 and moving the rod 48 forward by the heat radiation actuator 47. In particular, the heat dissipation actuator 47 is driven in the same manner as the actuator 33 that operates the engagement block body 31, and the heat dissipation actuator 47 can be driven by the drive control of the actuator 33 that operates the engagement block body 31. .

  In this way, by bringing the heat radiating plate 45 into contact with the metal plate 25, the heat radiating effect can be greatly improved.

It is a perspective view of the use condition of the image projector concerning an embodiment of the present invention. It is a top view of the use condition of the image projector which concerns on embodiment of this invention. It is a schematic explanatory drawing of an image projector. It is a block diagram of the control part of an image projector. It is explanatory drawing of the raising / lowering mechanism part of an image projector. It is explanatory drawing of the support frame with which a support | pillar is mounted | worn. It is a top view of the use condition of the image projector which concerns on embodiment of this invention. It is explanatory drawing of the thermal radiation mechanism in an image projector.

Explanation of symbols

S screen
10 Image projector
11 Enclosure
12 Light source
13 Projector
13a LCD (Liquid Crystal Display)
13b Imaging optics
14 Power supply circuit
15 Control unit
16 Illumination optics
18 gear
19 Lifting motor
20 props
20-1 First protruding piece
20-1R 1st rack surface
20-2 Second protruding piece
21 base
22 Guide piece
20-2R Second rack surface
30 Through hole
31 Engagement block body
31a Engagement surface
32 rods
33 Actuator
37 Heat pipe
38 Cooling fan
39 Ballast

Claims (14)

An image projection apparatus that is disposed in a housing and has a projection unit that projects an image using light emitted from a light source, and is supported by a support column extending in a vertical direction,
An image projection apparatus in which a through-hole penetrating in the vertical direction is provided in the image projection apparatus, and the column is inserted into the through-hole so as to be movable in the vertical direction along the column.   The image projection device according to claim 1, wherein the through-hole is provided at or near the center of gravity of the image projection device. A power supply circuit for supplying power to the light source and the projection unit;
The image projection apparatus according to claim 1, wherein the projection unit and the power supply circuit are arranged with the through hole interposed therebetween.   The heat dissipation part which contact | abuts to the said support | pillar and consists of a high heat conductive material with high heat conductivity is provided, The heat | fever inside an apparatus is transmitted to the said support | pillar by the said heat dissipation part, The any one of Claims 1-3 characterized by the above-mentioned. The image projection apparatus described in 1.   5. The image projection device according to claim 1, wherein the through-hole is capable of being inserted into the support column by vertically inverting the image projection device. The projection unit includes image inverting means for inverting the image to be projected vertically and horizontally.
6. The image projection apparatus according to claim 5, wherein when the image projection apparatus is inverted up and down, the image projected by the image inversion unit is inverted up and down.   The image projecting apparatus according to claim 1, wherein the projecting unit projects an image to be projected in a left-right direction orthogonal to the support column.   The image projection apparatus according to claim 1, further comprising a height holding unit configured to hold the image projection apparatus at a predetermined height of the support column.   The image projection apparatus according to claim 1, further comprising a rotation prevention unit that prevents the image projection apparatus from rotating around the support column. An image projection device having a light source and a projection unit that projects an image using light emitted from the light source;
An image projecting system comprising a column extending in a vertical direction and supporting the image projecting device at a predetermined height;
An image projection system in which the image projection device is provided with a through-hole penetrating in the vertical direction, and the column is inserted into the through-hole so that the image projection device is movable in the vertical direction along the column. A strut that has a light source and a projection unit that projects an image using light emitted from the light source, and supports an image projection device that has a through-hole provided to penetrate in the vertical direction,
A support that supports the image projection device at a predetermined height by being inserted into and engaged with the through hole.   The support column according to claim 11, further comprising an abutting portion that is brought into contact with a screen on which the image is projected or a support body of the screen.   The column according to claim 11 or 12, further comprising a height holding unit that holds the image projection device at a predetermined height. The column according to any one of claims 11 to 13, further comprising a rotation prevention unit that prevents the image projection device from rotating.

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