JP2004347743A - Projection type video display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the number of parts and mass of an image contour adjusting mechanism being a component of a projection type video display apparatus and the size and the cost of the apparatus, and to facilitate the adjustment of an image contour. <P>SOLUTION: The projection type video display device is equipped with: a projection unit for projecting a video to a screen; and the image contour adjusting mechanism for supporting the projection unit so as to positionally adjust the projection unit. The image contour adjusting mechanism has six position adjusting mechanisms for respectively adjusting the six degrees of freedom of the position of the projection unit, and the position adjusting mechanisms for adjusting two degrees of freedom out of six of them are constituted to have the same adjustment axis as the component. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a projection-type image display device that displays an image by projecting an image output from a projection unit onto a screen from behind.
[0002]
[Prior art]
In the past, the projection unit generally used a cathode ray tube that could easily correct the displacement on the screen with an electric circuit, but in recent years, due to the digitization of images, the projected image has been electrically corrected. It is becoming mainstream that liquid crystal devices and digital mirror devices (DMD) that cannot be used are applied. In a projection unit that cannot electrically correct such a projected image, an image outline adjustment mechanism is indispensable.
[0003]
Conventional projection image display devices include a Y-axis translation plate that can move a projection unit in the Y-axis direction, a Y-axis rotation plate that can rotate around the Y-axis, and a Z-axis that can rotate around the Z-axis. An image adjustment mechanism is constituted by a rotating plate, an X-axis rotating plate rotatable around the X-axis, a Z-axis translation plate movable in the Z-axis direction, and an X-axis translation plate movable in the X-axis direction. There was something.
[0004]
Further, in another conventional projection type image display device, an image adjustment mechanism is configured by supporting a flat plate parallel to the ZX plane with three axes along the Y-axis direction, and these three axes are independently controlled. Alternatively, the projection unit is rotated at the same time to adjust the position of the rotation of the projection unit about the X axis, the rotation of the Z axis, and the translation of the projection unit in the Y axis direction (for example, see Patent Document 1).
[0005]
[Patent Document 1]
JP 2001-183739 A (page 2-5, FIG. 3)
[0006]
[Problems to be solved by the invention]
However, in the above-mentioned conventional projection type video display device in which the image adjustment mechanism is constituted by the six adjustment plates (three translation plates and three rotating plates), the image adjustment mechanism needs adjustment of six degrees of freedom. However, since an adjusting plate is required for each degree of freedom, the number of parts and the mass are increased, and the cost is increased.
[0007]
Further, in the above-mentioned conventional projection type image display apparatus in which the image outline adjustment mechanism is configured by supporting the flat plate with three axes, it is necessary to simultaneously rotate two or three axes as adjustment axes in image outline adjustment. In such an adjusting means, there is a problem that the adjustment is difficult and a large amount of adjustment time is required because the already adjusted axis moves during the adjustment.
[0008]
The present invention has been made to solve such a conventional problem, and it is possible to reduce the number of parts and the mass of the image adjustment mechanism, the size and cost of the apparatus, and easily adjust the image outline of the projection type image. It is intended to obtain a display device.
[0009]
[Means for Solving the Problems]
The projection type image display device of the present invention,
In a projection-type image display device including a projection unit that projects an image on a screen, and a contour adjustment mechanism that supports the projection unit so that the position can be adjusted,
The image section adjustment mechanism has six position adjustment mechanisms for adjusting the six degrees of freedom of the position of the projection unit, respectively. Of these position adjustment mechanisms, the position adjustment mechanisms having two degrees of freedom have the same adjustment axis. Is constituted as a constituent element.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an overall perspective view of an image outline adjustment mechanism constituting a projection type image display device according to an embodiment of the present invention. FIG. 2 is a view in which the top plate 2 is omitted in FIG. FIG. 3 is a view in which the first adjustment plate 10 is omitted in FIG. FIG. 4 is an exploded perspective view of a remote operation unit in the image outline adjustment mechanism. FIG. 5 is a side view of the inside of a multi-projector constituted by a plurality of projection image display apparatuses according to the embodiments of the present invention.
[0011]
The multi-projector enables one large screen to be displayed by using a plurality of projection image display devices (rear projection type video projectors) in combination. In FIG. 5, two projection image display apparatuses 160 according to the embodiment of the present invention are vertically stacked to constitute a multi-projector.
[0012]
In FIG. 5, a projection type video display device 160 according to an embodiment of the present invention includes a cabinet (projection type video display device housing) 101 and a projection unit provided behind cabinet 101 and projecting an output video image forward. 102, a screen 103, and an image outline adjustment mechanism 150.
[0013]
The screen 103 is provided on the front surface of the cabinet 101. Further, the projection unit 102 is provided at the rear in the cabinet 101, and projects an output image on a front screen 103. Further, the image outline adjustment mechanism 150 corrects the outline of the image projected on the screen 103 from the projection unit 102. In FIG. 5, the projection unit 102 is arranged above the image outline adjustment mechanism 150 so as to be position-adjustable.
[0014]
1 to 4, the image outline adjustment mechanism 150 includes a base 1, a top 2, a remote operation unit 9, a first adjustment plate 10, a first adjustment shaft 11, a bearing 12, 22, two shafts 13, 13, a second adjusting plate 20, two shafts 23a, 23a and 23b, 23b, respectively, a hanging wall 25, gears 32, 33, 64, 65, and a shaft. 34, 66, brackets 35, 67, moving plates 41, 51, 61, standing pieces 55, and shafts 71, 72, 73, 74, 75, 76.
[0015]
The top plate 2 has a mounting surface 2a, side walls 2c, hanging pieces 2d, and long holes 2e. The first adjusting plate 10 has a rear wall 10a, a bottom wall 10b, side walls 10c and 10d, a standing piece 10e, a long hole 10f, and an opening 10g. The second adjusting plate 20 has a rear wall 20b, a front wall 20a, and long holes 20c and 20d. The bracket 35 has an upright wall 35a, a screw hole 35b, a screw hole 35c, and an upper wall 35d. The moving plate 41 has side walls 41a and 41b, a rear wall 41c, a screw hole 41d, and a bottom wall 41e. The moving plate 51 has a screw hole 51a, a front wall 51b, a rear wall 51c, a screw hole 51d, a standing piece 51e, long holes 51f and 51g, and a screw hole 51h. The moving plate 61 has an opening 61a, a front wall 61b, and a rear wall 61c. Also, the remote control unit 9 has motors 81, 82, 83, 84, 85, 86 connected to and driven by shafts 71 to 76, respectively.
[0016]
In FIG. 1, the image outline adjustment mechanism 150 is configured to project the projection unit 102 (see FIG. 5) on the base 1 with respect to a screen 103 (shown by imaginary lines in FIG. 1) arranged at a predetermined position on the XY plane in the XYZ axes. The position of the projection unit 102 is adjusted by moving the top plate 2 having the placement surface 2a for placing the projection unit 102 thereon.
[0017]
The image section adjustment mechanism 150 includes an X-axis translation mechanism (hereinafter referred to as “A”) as six position adjustment mechanisms for adjusting the positions of the six degrees of freedom of the top plate 2 on which the projection unit 102 is mounted. , An X-axis rotation mechanism (hereinafter referred to as “B”), a Z-axis translation mechanism (hereinafter referred to as “C”), a Z-axis rotation mechanism (hereinafter referred to as “D”), and a Y-axis translation mechanism. A mechanism (hereinafter referred to as “E”) and a Y-axis rotation mechanism (hereinafter referred to as “F”) are provided.
[0018]
Further, the image outline adjustment mechanism 150 includes a remote operation unit 9 (see FIG. 4) for driving these six position adjustment mechanisms. The remote operation unit 9 is detachably attached to the image outline adjustment mechanism 150, and can remotely operate the image outline adjustment mechanism 150.
[0019]
In the image section adjustment mechanism 150, the X-axis translation mechanism A and the X-axis rotation mechanism B are mounted on the top plate 2 on which the projection unit 102 is mounted by one and the same adjustment axis (first adjustment axis 11). It is characterized in that the placing surface 2a is configured to be directly or indirectly rotated about the X axis and to be translated in the X axis direction.
[0020]
In addition, this image outline adjustment mechanism 150 is configured such that the Z-axis translation mechanism C and the Z-axis rotation mechanism D use the same adjustment axis (the second adjustment axis 21) for the top plate 2 on which the projection unit 102 is mounted. Is directly or indirectly rotated about the Z-axis and parallelly moved in the Z-axis direction.
[0021]
In the following description, for convenience of explanation, the X-axis direction is the left-right direction, the Y-axis direction is the up-down direction, and the Z-axis direction is the front-rear direction (the screen side is the front, and the opposite side is the back). It does not specify.
[0022]
[X-axis translation mechanism A]
First, the X-axis translation mechanism A will be described mainly with reference to FIG. 2 in which the top plate 2 is omitted. The X-axis translation mechanism A is mainly provided in the internal space of the bottomed box-shaped first adjustment plate 10 located below the top plate 2. The X-axis translation mechanism A is configured to transmit a driving force of a motor 81 as a component of the remote operation unit 9 to the top 2 as a force along the X-axis direction, and a transmission mechanism A that transmits the driving force. The first adjustment shaft 11 adjusts the top plate 2 to move in parallel with the X-axis direction without play due to the applied driving force.
[0023]
[Mechanism A transmission means]
The mechanism A transmission means includes a shaft 71 that transmits the rotational motion of the motor 81 along a Z-axis direction, and two gears 32 that are engaged with each other at right angles so as to change the rotational motion of the shaft 71 by 90 degrees. 33, a shaft 34 connected to the gear 33 and threaded, and a bracket 35 movable in the X-axis direction with rotation of the shaft 34 and fixed to the top plate 2 are provided. The tip of the rod 34 is rotatably supported on a standing piece 10e orthogonal to the X-axis direction (along the Z-axis direction).
[0024]
The shaft 34 is rotatably attached to the rear wall 10a of the first adjustment plate 10 by a set collar or the like so as to penetrate from the rear. The bracket 35 is, for example, a U-shaped opening that opens downward. The bracket 35 is disposed so that the upright wall 35a is parallel to the Z-axis direction, and is provided with a screw hole so that the upright wall 35a can move along the X-axis direction. 35b is provided. The upper wall 35d of the bracket 35 is provided with a screw hole 35c for fixing to the top plate 2. The upright piece 10e in FIG. 2 is formed by cutting and raising the bottom wall 10b of the first adjustment plate 10 upward, but this upright piece 10e is formed by fixing a separate body by appropriate means. It may be something like this.
[0025]
[First adjustment shaft 11]
The first adjusting shaft 11 is a long cylindrical or columnar type having the left and right side walls 10c and 10d of the first adjusting plate 10 penetrated along the X-axis direction, and is formed of, for example, metal. is there. Although the first adjustment shaft 11 in FIG. 2 is disposed near the front ends of the side walls 10c and 10d, the first adjustment shaft 11 is not limited to this. The first adjusting shaft 11 can be moved along the X-axis direction without any backlash by the bearings 12, 12 whose inner diameters are set to be substantially the same as or slightly larger than the first adjusting shaft 11. It is attached to one adjustment plate 10. Both ends protruding outward from the side walls 10c, 10d of the first adjustment shaft 11 are attached to the side walls 2c, 2c hanging downward from the top plate 2 arranged to be covered by the first adjustment plate 10. , And are fixed by fixing means such as screws.
[0026]
Therefore, in the X-axis translation mechanism A, when the shaft 71 is rotated by the motor 81, the rotational motion is transmitted in the order of the gears 32, 33, and the shaft 34, and the rotation of the shaft 34 that rotates with the tip end supported is performed. The bracket 35 moves along the X-axis direction (left and right), and the top plate 2 fixed to the bracket 35 translates in the X-axis direction. At this time, since the first adjustment shaft 11 and the top plate 2 are fixed, it is possible to translate while holding the top plate 2 in an appropriate state without play.
[0027]
[X-axis rotation mechanism B]
Further, the X-axis rotation mechanism B will be described mainly with reference to FIG. The X-axis rotation mechanism B includes a moving plate 41 (a moving plate smaller than the first adjusting plate 10), which is disposed inside the first adjusting plate 10 so as to be movable along the Z-axis direction, A mechanism B transmission means for transmitting a rotational driving force from a motor 82 constituting the remote operation unit 9 to the translation operation along the Z-axis direction, and a translation movement of the movable plate 41 by the mechanism B transmission means. And a mechanism B converting means for converting the force into a force rotating around the X axis by using the adjusting shaft 11.
[0028]
[Moving plate 41]
The moving plate 41 has a box shape with an opening at an upper side and a front side, and is disposed inside the first adjusting plate 10 at a position closer to the rear. The moving plate 41 projects the shafts 13 outward from the vicinity of the rear ends of the side walls 41a, 41b, and connects the outer ends of the shafts 13, 13 to the side walls 10c, 10d of the first adjusting plate 10. The shafts are supported in the elongated holes 10f, 10f formed in the above, and can be moved along the elongated holes 10f, 10f.
[0029]
[Mechanism B transmission means]
The mechanism B transmission means moves the shaft 72 similarly attached by a set collar or the like at a position separated from the shaft 71 of the rear wall 10a of the first adjustment plate 10 by a predetermined distance to a substantially central position of the rear wall 41c of the movable plate 41. The movable plate 41 is configured to be able to move in the Z-axis direction by transmitting a rotational driving force by being screwed into a screw hole 41d provided in the moving plate 41.
[0030]
[Mechanism B conversion means]
The mechanism B conversion means includes two hanging pieces 2 d, which hang down from the mounting surface 2 a of the top plate 2, at intermediate portions between the protruding base ends of the side walls 41 a, 41 b of the movable plate 41 and the slots 10 f, 10 f. 2d (see FIG. 1; however, the hanging piece 2d on the side wall 41b side does not appear in FIG. 1), and a partial circle in which either the front or the rear is raised vertically in each of the hanging pieces 2d, 2d. An arc-shaped long hole 2e is formed so that the shaft 13 passes therethrough. Further, the mechanism B conversion means is configured such that the first adjustment shaft 11 supported by a bearing 12 attached to the first adjustment plate 10 functions as a component of the mechanism B conversion means.
[0031]
Therefore, when the rotation is transmitted from the motor 82 to the shaft 72 in the X-axis rotation mechanism B, the moving plate 41 is translated along the Z-axis direction so as to approach or separate from the side wall 10a of the first adjustment plate 10. At this time, the shaft 13 fixed to the moving plate 41 moves along the inside of the partial arc-shaped long hole 2 e of the top plate 2, so that the top plate 2 moves along the axis of the first adjustment shaft 11. It rotates appropriately (around the X axis).
[0032]
Thus, the first adjustment shaft 11 functions as a common component of the X-axis translation mechanism a and the X-axis rotation mechanism B. Thus, the position of rotation and translation about the X axis can be adjusted by one two-axis adjustment plate (first adjustment plate 10), so that the number of adjustment plates can be reduced.
[0033]
[Z-axis translation mechanism C]
Next, the Z-axis translation mechanism C will be described mainly with reference to FIG. 3 in which the top plate 2 and the first adjustment plate 10 are omitted. The Z-axis translation mechanism C is mainly provided in the internal space of the box-shaped second adjustment plate 20 that opens upward. The Z-axis translation mechanism C includes a moving plate 51 disposed inside the second adjusting plate 20 and fixed to the first adjusting plate 10, and a motor 83 constituting the remote control unit 9 on the moving plate 51. And a second adjusting shaft 21 that adjusts the moving plate 51 to move properly in the Z-axis direction by the rotational driving force transmitted by the mechanism C transmitting device. And is constituted by.
[0034]
[Moving plate 51]
The moving plate 51 has a box shape that opens downward (however, an upper wall is omitted in FIG. 3 so that the inside can be visually recognized), and a screw hole 51a indicated by an imaginary line in FIG. The first adjustment plate 10 and the screw are rotatably fixed around the screw by means of a screw that is not used.
[0035]
[Mechanism C transmission means]
The mechanism C transmission means screw a shaft 73, which is penetrated from the rear wall 20b of the second adjustment plate 20 from behind and rotatably attached with a set collar or the like, into a screw hole 51d formed in the rear wall 51c of the movable plate 51. It is configured in combination.
[0036]
[Second adjustment shaft 21]
The second adjustment shaft 21 is set to have a length substantially matching the front-rear width of the second adjustment plate 20, and penetrates along substantially the center of the rear wall 51 c and the front wall 51 b of the movable plate 51 along the Z-axis direction. It is a cylindrical type or a columnar type arranged so that it is formed, for example, from metal. The second adjusting shaft 21 is supported by bearings 22, 22 whose inner diameters attached to the rear wall 51 c and the front wall 51 b of the movable plate 51 are set to be substantially equal to or slightly larger than the second adjusting shaft 20. Have been. The front and rear ends of the second adjustment shaft 21 are fixed to the rear wall 20b and the front wall 20a of the second adjustment plate 20 by fixing means such as screws.
[0037]
Therefore, in the Z-axis translation mechanism C, when rotation is transmitted from the motor 83 to the shaft 73, the moving plate 51 is translated in the Z-axis direction with respect to the second adjustment plate 20 by the screw hole of the shaft 73. Therefore, the first adjustment plate 10 and the top plate 2 fixed to the moving plate 51 translate in the Z-axis direction. At this time, since the second adjustment shaft 21 and the second adjustment plate 20 are fixed, the first adjustment plate 10 (that is, the top plate 2) fixed to the movable plate 51 can be maintained in an appropriate state. It is possible to translate while holding it without a break.
[0038]
[Z axis rotation mechanism D]
Further, the Z-axis rotation mechanism D will be described mainly with reference to FIG. The Z-axis rotation mechanism D includes a movable plate 61 (a movable plate smaller than the movable plate 51) which is movable on the movable plate 51 at least along the X-axis direction, and a remote control unit 9 on the movable plate 61. A mechanism D transmitting means for transmitting the rotational driving force from the motor 84 to the second moving plate 61 as a force along the X-axis direction, and a force along the X-axis direction of the moving plate 61 by the mechanism D transmitting means. And a mechanism D converting means for converting the force into a force rotating about the Z axis of the moving plate 51.
[0039]
[Moving plate 61]
The moving plate 61 is disposed inside the moving plate 51 and is formed in a U-shape that opens upward, and is disposed at a substantially central position in the moving plate 51. The moving plate 61 is provided with shafts 23a, 23a and shafts 23b, 23b so as to protrude outward near the left and right ends of the front and rear walls 61b, 61c, and connects the shafts 23a, 23a and 23b, 23b to the second. The adjustment plate 20 is inserted into long holes 20c, 20c and 20d, 20d formed in the front and rear walls 20a, 20b of the adjustment plate 20, and can be moved along the long holes 20c, 20c and 20d, 20d.
[0040]
[Mechanism D transmission means]
The mechanism D transmitting means includes a shaft 74 for transmitting the rotational driving force of the motor 84, two gears 64, 65 orthogonally meshed with each other so as to change the rotational movement of the shaft 74 by 90 degrees, and a gear 65. And a bracket 67 that is movable in the X-axis direction along with the rotation of the shaft 66 and is fixed to the moving plate 61. The movable plate 51 is rotatably supported by an upright piece 51e of the movable plate 51 protruding upward through an opening 61a of the 61.
[0041]
[Mechanism D conversion means]
The mechanism D conversion means is configured to extend from the protruding base end of the front wall 51b of the moving plate 51 and the protruding base end of the rear wall 61c of the shaft 23b existing at an intermediate portion from the base end of the front wall 61b of the shaft 23a to the slot 20c. In the rear wall 51c of the movable plate 51 existing in the intermediate portion up to 20d, elongated holes 51f, 51f and elongated holes 51g, 51g each forming a partial arc shape are formed, and penetrate the shafts 23a, 23a and the shafts 23b, 23b. It is constituted so that it may be. These long holes 51f and 51g have a slightly inclined left or right end so as to be symmetrical about the second adjustment shaft 21. In the mechanism D converting means, the second adjustment shaft 21 rotatably attached to the bearing 22 provided on the moving plate 51 functions as a component of the mechanism D converting means, and the moving plate 51 It is configured to rotate around the adjustment shaft 21 (that is, around the Z axis).
[0042]
Accordingly, in the Z-axis rotation mechanism D, when the shaft 74 is rotated by the motor 84, the rotational motion is transmitted in the order of the gears 64, 65, and the shaft 66, and the rotation of the shaft 66 that rotates with the tip end supported is performed. A moving plate 61 slidably attached to the moving plate 51 moves along the X-axis direction with respect to the moving plate 51. At this time, the shafts 23a and 23b fixed to the moving plate 61 move along the long holes 51f and 51g of the moving plate 51, so that the moving plate 51 rotates around the second adjustment shaft 21 (that is, the Z-axis). Rotation). As a result, the first adjustment plate 10 (that is, the top plate 2) fixed to the moving plate 51 rotates around the Z axis.
[0043]
As described above, the second adjustment shaft 21 functions as a common component of the Z-axis translation mechanism C and the Z-axis rotation mechanism D. Accordingly, since the position of rotation and translation about the Z axis can be adjusted by one two-axis adjustment plate (second adjustment plate 20), the number of adjustment plates can be reduced.
[0044]
[Y-axis translation mechanism E]
Next, the Y-axis translation mechanism E will be described mainly with reference to FIG. The Y-axis translation mechanism E is provided with a remote control unit on a shaft 75 penetrating from a rear end of the second adjustment plate 20 to a hanging wall 25 provided to be hung by an appropriate method such as welding an L-shaped frame. 9, the second adjusting plate 20 disposed above the base table 1 is vertically moved by a jack system by the rotational driving force transmitted from the motor 85 constituting the moving plate 51 and the first moving plate 51 and the first moving plate 51 disposed therein. The top plate 2 is vertically moved (translationally moved in the Y-axis direction) via the adjustment plate 10. Since the configuration of the Y-axis translation mechanism E is well known in the related art, detailed description thereof will be omitted.
[0045]
[Y-axis rotation mechanism F]
Further, the Y-axis rotation mechanism F will be described mainly with reference to FIG. The Y-axis rotation mechanism F fixes a shaft 76 penetrating from a position of the rear wall 10a of the first adjustment plate 10 away from the shaft 71 on the side opposite to the shaft 72, to the top wall of the movable plate 51. And is screwed into a screw hole 51h formed in a standing piece 55 protruding from an opening 10g formed continuously with the bottom wall 10b of the first adjusting plate 10 and the bottom wall 41e of the moving plate 41. I have.
[0046]
Therefore, in the Y-axis rotation mechanism F, when the shaft 76 is rotated by the rotation of the motor 86, a force for translating the first adjustment plate 10 to the moving plate 51 along the Z-axis direction acts. The adjustment plate 10 is rotatably attached to a screw hole 51a provided on the top surface of the moving plate 51 by a screw (not shown), and thus rotates around the screw hole 51a (that is, around the Y axis). .
[0047]
[Remote operation unit 9]
Further, the remote operation unit 9 will be described mainly with reference to FIG. The remote control unit 9 is connected to a drive unit 90 in which motors 81, 82, 86 connected to and driven by shafts 71, 72, 76 respectively are enclosed in one housing 95, and shafts 73, 74, 75 respectively. A drive unit 91 includes motors 83, 84, 85 driven by a single housing 96, and a controller 98 for remotely controlling these drive units 90, 91. A gear unit is attached to the heads of the motors 81 to 86, and the gear unit can reduce the speed to an appropriate number of revolutions.
[0048]
The drive unit 90 positions the housing 95 on the rear wall 10a of the first adjustment plate 10 with a positioning pin, and detachably attaches the connection portion to a connection portion using a joint bit or the like. Similarly, the drive unit 91 positions the housing 96 to the rear wall 20b and the hanging wall 71 of the second adjustment plate 20 with the positioning pin and detachably attaches the connecting portion to the connection portion using a joint bit or the like. It has become.
[0049]
The shafts 71, 72, and 76 are all mounted on the rear wall 10a (see FIG. 2). Since the mutual distance does not change when the position of the projection unit 102 is adjusted, the motors 81, 82, and 86 that drive them are divided. Instead, they can be configured collectively as the drive unit 90. Further, the shafts 73, 74, 75 are attached to members having the same behavior as the rear wall 20b and the hanging wall 25. Since the mutual distance does not change when the position of the projection unit 102 is adjusted, the motors 83 for driving these are also provided. , 84 and 85 can be configured as a drive unit 91 without being divided.
[0050]
6, 7, and 8 are diagrams for explaining a shift that occurs in an image displayed on the screen 103. The displacements on the screen 103 include six types of displacements, that is, up / down, left / right, tilt, projection magnification, vertical trapezoidal distortion, and horizontal trapezoidal distortion, or deviations due to a combination thereof.
[0051]
In FIG. 6, reference numeral 104a denotes a video whose projection magnification is invalid with respect to the screen 103 (illegal magnification video), 104b denotes a video tilted with respect to the screen 103 (illegal video), and 104c denotes an illegal top, bottom, left and right with respect to the screen 103. Video (upper / lower left / right illegal video).
[0052]
In FIG. 7, reference numeral 104d denotes an image when vertical trapezoidal distortion occurs (vertical trapezoidal illegal image), and in FIG. 8, reference numeral 104e denotes an image when horizontal trapezoidal distortion occurs (horizontal trapezoidal invalidation). Video).
[0053]
Such a shift in the image projected from the projection unit 102 to the image projected on the screen 103 can be adjusted by the image outline adjustment mechanism 150. The projection magnification can be corrected by performing adjustment by the Z-axis translation mechanism 5 of the image section adjustment mechanism 150. In addition, the horizontal trapezoidal distortion can be corrected by the adjustment by the Y-axis rotation mechanism 8. In addition, the inclination of the image can be corrected by adjusting the Z-axis rotation mechanism 6. In addition, by adjusting the X-axis rotation mechanism 4, the vertical trapezoidal distortion can be corrected. By making adjustments using the X-axis translation mechanism 3 and the Y-axis translation mechanism 7, the up, down, left, and right positions can be corrected.
[0054]
As described above, according to the embodiment of the present invention, by adjusting two degrees of freedom (rotational degree of freedom and translational degree of freedom) of the six degrees of freedom adjustment by the same adjustment axis, one degree of freedom is obtained. Can be adjusted with the two-axis adjustment plate, so that the number of adjustment plates can be reduced, and the number of parts and mass of the image adjustment mechanism and the size and cost of the device can be reduced while maintaining sufficient accuracy of image adjustment. In addition, since the two degrees of freedom can be adjusted by independent shafts, the image contour can be easily adjusted.
[0055]
Further, since the remote operation unit 9 enables remote operation by motor control, the usability of the image adjustment mechanism can be improved.
[0056]
In the above embodiment, it is also possible to adjust the rotational degree of freedom and the translational degree of freedom about the Y axis by the same adjustment axis.
[0057]
【The invention's effect】
As described above, according to the present invention, by adjusting two degrees of freedom among the six degrees of freedom adjustment using the same adjustment axis, the number of parts and the mass of the image outline adjustment mechanism, and the size and cost of the apparatus are reduced. Thus, there is an effect that the image contour can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of an image outline adjustment mechanism included in a projection display apparatus according to an embodiment of the present invention.
FIG. 2 is a perspective view partially omitted in FIG.
FIG. 3 is a perspective view in which a part is omitted in FIG. 2;
FIG. 4 is an exploded perspective view of a remote operation unit in the image outline adjusting mechanism that constitutes the projection display apparatus according to the embodiment of the present invention.
FIG. 5 is a side view of the inside of a multi-projector constituted by a plurality of projection image display apparatuses according to the embodiments of the present invention.
FIG. 6 is a diagram illustrating a shift that occurs in an image displayed on a screen of a projection-type image display device.
FIG. 7 is a diagram illustrating a shift that occurs in an image displayed on a screen of a projection-type image display device.
FIG. 8 is a diagram illustrating a shift that occurs in an image displayed on a screen of a projection-type image display device.
[Explanation of symbols]
Reference Signs List 1 base stand, 2 top plate, 2a mounting surface, 2c side wall, 2d hanging piece, 2e long hole, 9 remote control unit, 10 first adjusting plate, 10a rear wall, 10b bottom wall, 10c, 10d side wall, 10e Standing piece, 10f long hole, 10g opening, 11 first adjustment shaft, 12 bearing, 13 shaft, 20 second adjustment plate, 20b rear wall, 20a front wall, 20c, 20d long hole, 21 second adjustment shaft , 22 bearing, 23a, 23b shaft, 25 hanging wall, 32, 33 gear, 34 shaft, 35 bracket, 35a standing wall, 35b screw hole, 35c screw hole, 35d upper wall, 41 moving plate, 41a, 41b side wall, 41c Rear wall, 41d screw hole, 41e bottom wall, 51 moving plate, 51a screw hole, 51b front wall, 51c rear wall, 51d screw hole, 51e standing piece, 51f, 51g long hole, 1h screw hole, 55 standing piece, 61 moving plate, 61a opening, 61b front wall, 61c rear wall, 64, 65 gear, 66 shaft, 67 bracket, 71, 72, 73, 74, 75, 76 shaft, 81, 82 , 83, 84, 85, 86 motors, 90, 91 drive units, 95, 96 housings, 98 controllers, 101 cabinets, 102 projection units, 103 screens, 150 image adjustment mechanisms, 160 projection image display devices.

Claims (5)

In a projection-type image display device including a projection unit that projects an image on a screen, and a contour adjustment mechanism that supports the projection unit so that the position can be adjusted,
The image section adjustment mechanism has six position adjustment mechanisms for adjusting the six degrees of freedom of the position of the projection unit, respectively. Of these position adjustment mechanisms, the position adjustment mechanisms having two degrees of freedom have the same adjustment axis. The projection type video display device characterized by comprising as a constituent element. An X-axis rotation mechanism configured to rotate the projection unit around the X-axis with respect to the screen arranged in parallel with an XY plane; 2. The projection type image display device according to claim 1, wherein the projection type image display device is an X-axis translation mechanism that translates in an axial direction. A two-degree-of-freedom position adjustment mechanism having the same adjustment axis as a component, a Z-axis rotation mechanism for rotating the projection unit about the Z-axis with respect to the screen arranged in parallel with an XY plane, 2. The projection type image display device according to claim 1, wherein the projection type image display device is a Z-axis translation mechanism that translates in the axial direction. The position adjustment mechanism,
There are two two-degree-of-freedom position adjustment mechanisms having the same adjustment axis as a component,
One of them is an X-axis rotation mechanism for rotating the projection unit about the X-axis with respect to a screen arranged parallel to the XY plane, and an X-axis translation mechanism for moving the projection unit in the X-axis direction in parallel.
2. The projection type according to claim 1, wherein the other one is a Z-axis rotation mechanism for rotating the projection unit about the Z-axis and a Z-axis translation mechanism for moving in parallel in the Z-axis direction. Video display device. 5. The projection type image display device according to claim 1, wherein the image section adjusting mechanism further includes a remote control unit that drives the position adjusting mechanism having six degrees of freedom by remote control.

Images