JP2019066588A - projector - Google Patents

Abstract

To provide a projector that can finely adjust the amount of rotation of a rotation object.SOLUTION: A projector comprises: a light source device; a plurality of light modulators that modulate beams of light emitted from the light source device; a light synthesizer that is integrated with the plurality of light modulators and synthesizes the beams of light made incident from the plurality of light modulators; a projection optical device that projects the light synthesized by the light synthesizer; and an attitude adjustment device that adjusts the attitude of the light synthesizer. The attitude adjustment device includes a rotating member that is provided integrally with the light synthesizer, and a rotating device that rotates the rotating member with a preset rotation shaft as the center to rotate the light synthesizer with the rotating member. The rotating device has a lead screw that has the axis of rotation in parallel with an axis orthogonal to the rotation shaft; the rotating member has an engagement part that is engaged with the lead screw; the engagement part is engaged with the lead screw at a portion on the opposite side of the rotation shaft with respect to the lead screw.SELECTED DRAWING: Figure 19

Description

  The present invention relates to a projector.

Conventionally, a light source device, a light modulation device that modulates light emitted from the light source device to form an image according to image information, and a projection optical device that enlarges and projects the formed image on a projection surface, Projectors are known.
A liquid crystal panel is exemplified as a light modulation device adopted for such a projector.
There is also known a projector in which a projection lens unit corresponding to a projection optical device is configured to be detachable (see, for example, Patent Document 1).

Unexamined-Japanese-Patent No. 2010-276895

By the way, if the arrangement of the projection optical device and the light modulation device such as the liquid crystal panel is not appropriate, there is a problem that the displayed image is deteriorated. For example, when one of the projection optical device and the light modulation device is inclined with respect to the other, a phenomenon called "one-sided blur" in which focus is not achieved in at least one of left and right and / or upper and lower in a projected image tends to occur. Such one-sided blur becomes remarkable as the resolution of the display image increases.
To address this problem, it is conceivable to adopt a mechanism for tilting the projection optical device with respect to the light modulation device. However, since the projection optical device is relatively heavy, the mechanism is required to have high rigidity, and the mechanism tends to be large, and it is likely to increase power consumption, weight, and manufacturing cost. Furthermore, since the projection optical device is disposed at a position relatively close to the outside inside the projector, there is a problem that noise is likely to leak to the outside when the projection optical device is tilted by the actuator.

On the other hand, an image forming unit in which a plurality of light modulation devices and a light combining device for combining light fluxes passing through the plurality of light modulation devices are integrated is inclined with respect to a plane orthogonal to the optical axis of the projection optical device. A posture adjustment device that suppresses the occurrence of the above-mentioned one-sided blur can be considered.
As a configuration of such a posture adjustment device, a lead nut that is integrally rotated with the light combining device is disposed offset with respect to the rotation axis of the light combining device, and a lead screw that meshes with the lead nut is A configuration may be considered that is arranged parallel to the direction orthogonal to the motion axis. In this configuration, when the lead screw is rotated, the light combining device, and hence the image forming unit, is rotated about the rotation axis.

Here, although precise adjustment is required for the inclination adjustment of the light combining device, the lead screw is suitable for precise position adjustment of the object to be adjusted with a large force (torque). However, the lead screw is a mechanism for making the rotational motion a linear motion, and is not suitable for a mechanism for rotating the adjustment target.
Further, when the lead screw is disposed so that the central axis intersects the direction parallel to the rotation axis, and the lead screw and the lead nut are provided relatively close to the rotation axis, The amount of rotation of the rotation member with respect to the amount of rotation of the lead screw, and in turn, the amount of rotation (rotation angle) of the image forming unit increases. However, the adjustment range (rotation range) of the tilt of the image forming unit necessary to suppress the occurrence of the above-mentioned one-sided blur is relatively small.
On the other hand, it is conceivable to reduce the amount of rotation of the image forming unit with respect to the amount of rotation of the lead screw by separating the rotation shaft and the lead nut as much as possible. However, in such a case, the posture adjustment device tends to be large.
For this reason, there has been a demand for a configuration in which the posture adjustment device can be configured in a small size and in which the inclination of the image forming unit can be finely adjusted.

  An object of the present invention is to solve at least a part of the above-described problem, and an object thereof is to provide a projector capable of finely adjusting the amount of rotation of a rotation target.

  A projector according to an aspect of the present invention includes a light source device, a plurality of light modulation devices that respectively modulate light emitted from the light source device, and the plurality of light modulation devices, and the plurality of light modulation devices The light synthesizing device that synthesizes the light incident from each of the above, a projection optical device that projects the light synthesized by the light synthesizing device, and an attitude adjusting device that adjusts the attitude of the light synthesizing device; The apparatus rotates the rotating member together with the rotating member by rotating the rotating member around the rotating member provided integrally with the light combining device and the rotating shaft set in advance. A rotating device having a lead screw whose rotation axis is parallel to an axis perpendicular to the rotation axis, and the rotation member has a meshing portion that meshes with the lead screw And the above Engaging portion, said from said pivot axis with respect to the lead screw, characterized in that the lead screw engaged at the opposite site.

  According to such a configuration, the meshing portion of the rotation member that is integrally rotated with the light combining device meshes with the lead screw at a portion opposite to the rotation axis with respect to the lead screw. As a result, the amount of rotation (rotational angle) of the rotation member relative to the amount of rotation of the lead screw, and hence, of the light combining device, as compared with the case where the meshing portion meshes with the lead screw The amount of rotation can be reduced. Therefore, the amount of rotation of the light combining device to be rotated can be finely adjusted. Further, as a result, the lead screw and the meshing portion can be disposed at a position close to the rotation axis, so that the posture adjustment device and hence the projector can be miniaturized.

In the above aspect, the lead screw has a spiral groove formed along the outer periphery, the meshing portion has a tooth that meshes with the spiral groove, and the tooth is the tooth with respect to the lead screw. It is preferable to be located on the opposite side to the pivot shaft.
According to such a configuration, it is possible to reliably set the portion of the meshing portion that meshes with the lead screw to the position on the opposite side of the rotation shaft with respect to the lead screw. Therefore, the above effects can be reliably achieved.

In the one aspect, it is preferable that the meshing portion be formed in a shape surrounding the lead screw along an outer periphery.
According to such a configuration, the engagement between the lead screw and the meshing portion is suppressed from being released due to any factor. Thereby, the lead screw and the meshing portion can be reliably meshed.
In addition, when the meshing portion and the lead screw formed in such a shape are viewed along the axial direction of the lead screw, the center of the opening in which the lead screw is inserted in the meshing portion, If the center of the lead screw is deviated in the direction away from the rotation axis, the lead screw can be easily brought into contact with the portion on the inner edge of the opening opposite to the rotation axis. Therefore, in this case, the lead screw can be reliably engaged with the portion opposite to the pivot shaft.

In the above aspect, the posture adjustment device is integrated with the first pulley integrally provided with the lead screw, the shaft member disposed so that the rotation axis is parallel to the lead screw, and the shaft member integrally. It is preferable to have the 2nd pulley provided in, the transmission member which transmits rotation of the said 1st pulley to the said 2nd pulley, and the rotation detection part which detects rotation of the said shaft member.
Here, the amount of rotation (rotation angle) of the light combining device to be rotated can be detected by detecting the amount of rotation of the lead screw without directly detecting the amount of rotation. However, in order to directly detect the amount of rotation of the lead screw, it is necessary to dispose a relatively large detection unit such as a sensor near the lead screw. On the other hand, since the lead screw meshes with the rotation member at the meshing portion, and the rotation member is integrally rotated with the light combining device, detection is performed so as not to interfere with the rotation member and the light combining device. It is necessary to arrange a part, and the arrangement of the detection part is difficult.
On the other hand, according to the above configuration, the rotation of the lead screw is transmitted to the shaft member via the first pulley, the transmission member and the second pulley, and the rotation of the shaft member is detected by the rotation detection unit Be done. According to this, the amount of rotation of the lead screw can be detected by the rotation detection unit disposed at a position away from the lead screw. Therefore, the degree of freedom in arranging the rotation detection unit can be improved, and the rotation detection unit can be arranged so as not to interfere with the rotation member and the light combining device.

In the one aspect, it is preferable that the second pulley accelerates the rotation transmitted by the transmission member from the first pulley.
According to such a configuration, the shaft member provided with the second pulley is rotated more than the first pulley. According to this, the rotation amount of the shaft member can be easily detected by the rotation detection unit, and the detection accuracy of the rotation amount of the lead screw, that is, the rotation amounts of the rotation member and the light combining device can be enhanced. Therefore, the amount of rotation of the light combining device to be rotated can be detected in more detail.

In the above aspect, the rotation detection unit is engaged with the shaft member to detect a rotation amount of the shaft member, and a light shield provided on the shaft member according to the rotation of the shaft member. It is preferable to have at least one of a photo sensor that can be shielded by the part.
According to such a configuration, it is possible to detect the amount of rotation of the rotating member, and hence the light combining device, based on the detection result by the potentiometer. Further, based on the detection result by the photosensor with high detection accuracy, the light combining device can be returned to the origin position with high accuracy.

In the above aspect, the transmission member is a timing belt, and the posture adjustment device preferably includes a tensioner that suppresses the occurrence of slack in the timing belt by pressing the timing belt.
According to such a configuration, the transmission member can be simply configured. In addition, since generation of slack in the timing belt is suppressed by the tensioner, the rotation of the first pulley can be transmitted to the second pulley and hence to the shaft member without loss. Therefore, by detecting the amount of rotation of the shaft member, it is possible to detect the amount of rotation of the lead screw and hence the amount of rotation of the light combining device accurately and reliably.

FIG. 1 is a schematic view showing a configuration of a projector according to an embodiment of the present invention. The figure which looked at the attitude | position adjustment apparatus in the said embodiment from the light-incidence side. The perspective view which looked at the attitude | position adjustment apparatus in the said embodiment from the light-incidence side. The perspective view which looked at the attitude | position adjustment apparatus in the said embodiment from the light emission side. The perspective view which looked at the attitude | position adjustment apparatus in the said embodiment from the light-incidence side. The perspective view which shows the attitude | position adjustment apparatus in the said embodiment. The side view showing the posture adjustment device in the above-mentioned embodiment. The disassembled perspective view which looked at the rotation support part in the said embodiment from the light-incidence side. The disassembled perspective view which looked at the rotation support part in the said embodiment from the light emission side. The figure which shows the rotation support part in the said embodiment. The perspective view which looked at the rotation drive part in the said embodiment from the light-incidence side. The perspective view which looked at the rotation drive part in the said embodiment from the light emission side. The perspective view which looked at the rotation drive part in the said embodiment from the light-incidence side. The perspective view which looked at the rotation drive part in the said embodiment from the light emission side. The perspective view which shows the lead screw in the said embodiment, and a rotation member. The figure which shows the rotation drive part in the said embodiment. The figure which shows the rotation drive part in the said embodiment. The figure which shows the locus | trajectory of the rotation member which is a deformation | transformation of the rotation member in the said embodiment. The figure which shows the formation position of the tooth in the meshing part in the said embodiment. The figure which looked at the rotation member in the said embodiment from the light-incidence side. The figure which looked at the attitude | position adjustment apparatus in the said embodiment from the light-incidence side. The disassembled perspective view which looked at the attitude | position adjustment apparatus in the said embodiment from the light-incidence side. The perspective view which expands and shows the rotation mechanism in the said embodiment. The perspective view which expands and shows the rotation mechanism in the said embodiment.

[Schematic configuration of the projector]
Hereinafter, an embodiment of the present invention will be described based on the drawings.
FIG. 1 is a schematic view showing the configuration of a projector 1 according to the present embodiment.
The projector 1 according to the present embodiment modulates light emitted from the light source device 41 provided therein to form an image according to image information, and projects the image in an enlarged manner on a projection surface such as a screen. It is a projection type display device. As shown in FIG. 1, the projector 1 includes an exterior housing 2 constituting an exterior, and an apparatus main body 3 housed in the exterior housing 2. Although such a projector 1 will be described in detail later, it has one of the features in that it includes an attitude adjustment device 5 (see FIG. 2) that adjusts the inclination of the image forming unit FU.
Hereinafter, the configuration of the projector 1 will be described in detail.

[Configuration of exterior housing]
The exterior housing 2 is formed in a substantially rectangular parallelepiped shape. The exterior housing 2 has a front surface portion 23, a back surface portion 24, a left side surface portion 25 and a right side surface portion 26, and although not shown, a top surface portion connecting one end side of these surface portions 23 to 26 and these surface portions And a bottom portion connecting the other ends of the first and second electrodes 23 to 26. The bottom surface portion is a surface facing the installation surface of the projector 1, and a plurality of leg portions are disposed.
Further, the front portion 23 has an opening 231. A part of a projection optical device 46 described later is exposed through the opening 231, and an image is projected by the projection optical device 46.

[Configuration of main unit]
The device body 3 includes an image projection device 4. In addition, although not illustrated in FIG. 1, the device body 3 includes a control device that controls the operation of the projector 1, a power supply device that supplies power to the electronic components that configure the projector 1, and cooling that configures the projector 1. A cooling device is provided to cool the object.

[Configuration of image projection apparatus]
The image projection device 4 forms an image according to image information (including an image signal) input from the control device, and projects the image on the projection surface. The image projection device 4 includes a light source device 41, a uniformizing device 42, a color separation device 43, a relay device 44, an image forming device 45, a projection optical device 46, and an optical component casing 47.

  The light source device 41 emits illumination light to the homogenizing device 42. As a configuration of such a light source device 41, for example, a solid light source such as LD (Laser Diode) that emits blue light which is light source light, a part of blue light emitted from the solid light source, green light And a wavelength conversion element that performs wavelength conversion to fluorescence including red light. In addition, as another structure of the light source device 41, the structure which has light source lamps, such as a superhigh pressure mercury lamp, as a light source, and the structure which has other solid light sources, such as LED (Light Emitting Diode), can be illustrated.

The equalizing device 42 equalizes the illuminance of the light beam incident from the light source device 41. The equalizing device 42 includes a first lens array 421, a second lens array 422, a polarization conversion element 423, and a superimposing lens 424. The homogenizing device 42 may further include a light control device that shields part of the incident light beam to adjust the emitted light amount, and various filters.
Among them, the polarization conversion element 423 aligns the light flux incident from the second lens array 422 into one type of linearly polarized light and emits it.

  The color separation device 43 separates the red light LR, the green light LG and the blue light LB from the light flux incident from the homogenization device 42. The color separation device 43 separates a dichroic mirror 431 for reflecting the red light LR and the green light LG and transmitting the blue light LB, a dichroic mirror 432 for transmitting the red light LR and reflecting the green light LG, and And a reflection mirror 433 that reflects the blue light LB toward the blue field lens 451. The green light LG reflected by the dichroic mirror 432 is incident on the field lens 451 for green.

  The relay device 44 includes an incident side lens 441, a reflection mirror 442, a relay lens 443 and a reflection mirror 444 provided on the optical path of the red light LR that has passed through the dichroic mirror 432, and the red light LR is a field lens for red. Lead to 451. In the present embodiment, the image projection device 4 has a configuration in which the red light LR passes through the relay device 44. However, the present invention is not limited to this, and for example, a configuration in which blue light LB passes may be used.

The image forming device 45 modulates each color light separated by the color separation device 43 for each color light, and combines the modulated each color light to form an image according to the image information. The image forming apparatus 45 includes a field lens 451 and a light modulation device 452 provided corresponding to the three color lights LR, LG, and LB, and one light combining device 456.
The light modulation device 452 (light modulation devices corresponding to red, green, and blue light are 452 R, 452 G, and 452 B) includes a transmissive liquid crystal panel 454 having a light incident surface and a light emission surface, and the liquid crystal The liquid crystal light valve is configured to include an incident side polarization plate 453 and an emission side polarization plate 455 positioned on the light incident side and the light emission side of the panel 454.

The light combining device 456 combines the color lights that have passed through the light modulation devices 452 to form the image. In the present embodiment, the light combining device 456 is configured by a cross dichroic prism having a substantially rectangular parallelepiped shape (substantially square pole shape).
The light combining device 456 is opposed to the light modulators 452 and includes three incident surfaces 456B, 456G, 456R (see FIG. 5 etc.) to which the color lights having passed through the light modulators 452 are respectively incident. And an output surface 456E (see FIG. 5 and the like) from which the combined light of the colored light (that is, the image light) is output. The image light emitted from the emission surface 456E is incident on the projection optical device 46.

In such a light combining device 456, holding members HM (see FIG. 2) for holding the corresponding light modulation devices 452 are attached to the respective incident surfaces 456B, 456G, 456R, whereby the light combining device 456 and each light modulation are provided. The device 452 is integrated.
Hereinafter, a configuration in which the light modulation device 452 and the light combining device 456 are integrated is referred to as an image forming unit FU. The image forming unit FU is supported by a posture adjustment device 5 described later.

The projection optical device 46 enlarges and projects the image light incident from the light combining device 456 onto the projection surface, and displays an image formed by the image light on the projection surface. The projection optical device 46 is configured as a combined lens in which a plurality of lenses are disposed in a lens barrel.
Although not shown, the projection optical device 46 is orthogonal to the optical axis (central axis) of the projection optical device 46 and in two directions orthogonal to each other (± X direction and ± Y direction described later) Movably supported by the shift device. The shift device holds the projection optical device 46 replaceably (removably), and is attached to a support member 8 of the posture adjustment device 5 described later. The projection optical device 46 can be replaceably attached to the support member 8 without passing through the shift device. However, not limited to this, the projection optical device 46 and the shift device may be attached to the support member 8 so as not to be removable.

The optical component casing 47 holds the devices 42 to 44 and the field lens 451.
Here, the illumination optical axis Ax, which is the designed optical axis, is set in the image projection device 4, and the optical component casing 47 is placed at a predetermined position on the illumination optical axis Ax. And hold the field lens 451. In the optical component casing 47, a space S in which the image forming unit FU is disposed is formed at a position where the three sides are surrounded by the field lenses 451.
The light source device 41 and the projection optical device 46 are disposed at predetermined positions in the illumination light axis Ax.

[Configuration of attitude adjustment device]
FIG. 2 is a view of the posture adjustment device 5 holding the image forming unit FU as viewed from the light incident side to the image forming unit FU. 3 and 4 are perspective views of the posture adjustment device 5 as viewed from the light incident side and the light emission side with respect to the image forming unit FU. FIG. 5 shows the posture adjustment device 5 holding the light combining device 456. It is the perspective view seen from the light-incidence side.
The image projection device 4 includes the posture adjustment device 5 shown in FIGS. 2 to 5 in addition to the above configuration.
In the following description, an axis parallel to the optical axis of the projection optical device 46 is taken as a Z axis, and two axes orthogonal to the Z axis and mutually orthogonal are taken as an X axis and a Y axis. Among these, the direction parallel to the Z axis and going from the back surface 24 to the front surface 23 is taken as the + Z direction. Further, a direction parallel to the X axis from the left side surface 25 to the right side surface 26 is a + X direction, and a direction parallel to the Y axis from the bottom surface to the top surface is a + Y direction. That is, the + Z direction is a direction in which the projection optical device 46 projects image light when viewed from the + Y direction side. Moreover, although illustration is abbreviate | omitted, let the opposite direction of + Z direction be-Z direction. The same applies to -X direction and -Y direction.

The posture adjusting device 5 holds the light combining device 456 and holds the image forming unit FU, and adjusts the inclination of the image forming unit FU with respect to the optical axis of the projection optical device 46, and thus the posture of the image forming unit FU. It is to adjust. Specifically, the posture adjustment device 5 rotates the light combining device 456 about the rotation axis Rx and the rotation axis Ry along the X axis and the Y axis orthogonal to each other, thereby the image forming unit FU. Adjust the tilt (posture).
Such a posture adjustment device 5 includes a first rotation unit 6, a second rotation unit 7, and a support member 8.

[Configuration of First Rotating Unit]
FIG. 6 is a perspective view of the posture adjustment device 5 in which the first rotation unit 6 is separated as viewed from the light incident side (−Z direction side), and FIG. 7 is the −X direction side of the posture adjustment device 5 It is the side view seen from.
The first rotation unit 6 supports the light combining device 456 and rotates the light combining device 456 around the rotation axis Ry, and corresponds to a Y rotation portion. The first rotation unit 6 includes a rotation support unit 61 located on the -Y direction side with respect to the light combining device 456, and a rotation drive unit 62 located on the + Y direction side, and these rotation support units 61 and the rotation drive unit 62 are attached to the frame 71 of the second rotation unit 7 respectively.

[Configuration of rotation support portion]
FIGS. 8 and 9 are exploded perspective views of the rotation support portion 61 as viewed from the light incident side (−Z direction side) and the light emission side (+ Z direction side).
The rotation support unit 61 supports the light combining device 456 from the -Y direction side. As shown in FIGS. 8 and 9, the pivot support 61 includes a pivot member 611, a connecting member 612, and two biasing members 613 (613 X, 613 Z).

The rotating member 611 is adhesively fixed to the surface 456D on the -Y direction side of the surfaces 456U and 456D that respectively intersect the incident surfaces 456B, 456G, 456R and the output surface 456E in the light combining device 456. The pivoting member 611 has a plate-like portion 6111, a shaft 6112, a biasing member 6113 and a protrusion 6116.
The plate portion 6111 is formed in a plate shape along the XZ plane. The surface on the + Y direction side of the plate-like portion 6111 is adhesively fixed to the surface 456D.
The shaft portion 6112 cylindrically protrudes in the −Y direction side from the approximate center of the surface in the −Y direction side of the plate portion 6111. The shaft portion 6112 is a portion to be the rotation axis Ry of the light combining device 456, and the center (optical center of the light combining device 456 when the light combining device 456 formed in a rectangular parallelepiped shape is viewed from the + Y direction side. And at the physical center). Such a shaft 6112 is inserted into a rectangular opening 6124 formed in the connecting member 612.

The biasing member 6113 is formed in a substantially rectangular parallelepiped shape, and is fixed to the end portion on the −Y direction side of the shaft portion 6112 by a screw. The biased member 6113 is orthogonal to the + X direction, and an abutting surface 6114 to which the biasing member 613X abuts, and orthogonal to the + Z direction and abuts the biasing member 613Z And a surface 6115. The contact surface 6114 is a surface on the + X direction side in the biased member 6113, and the contact surface 6115 is a surface on the −Z direction side in the biased member 6113.
The protrusion 6116 protrudes from the portion on the −X direction side with respect to the shaft 6112 in the −Y direction on the surface on the −Y direction side of the plate-like portion 6111 in a square pillar shape in the −Y direction. The protrusion 6116 is inserted into the opening 6123 of the connecting member 612.

FIG. 10 is a view of the rotation support portion 61 as viewed from the -Y direction side. In FIG. 10, illustration of the biasing member 6113 and the screw is omitted.
The connecting member 612 rotatably supports the rotating member 611 and is connected to the frame 71. As shown in FIG. 10, the connecting member 612 is formed in a substantially T shape when viewed from the -Y direction side. As shown in FIGS. 8 to 10, such a connecting member 612 has a connecting portion 6121 intersecting in the + Z direction, and a support portion 6122 for supporting the pivoting member 611.
The connecting portion 6121 is connected to the frame 71 by a screw.

  The support portion 6122 is formed in a substantially rectangular parallelepiped shape, and supports the pivoting member 611 and hence the image forming unit FU from the -Y direction side. As shown in FIGS. 8 to 10, the support portion 6122 has openings 6123 and 6124 penetrating the support portion 6122 along the + Y direction, and a concave portion 6127 on the + Y direction side of the −Y direction side. Have.

The openings 6123 and 6124 are substantially rectangular holes as viewed from the + Y direction, and the projection 6116 is inserted into the opening 6123, and the shaft 6112 is inserted into the opening 6124. .
As shown in FIG. 10, the recess 6127 is formed in a substantially rectangular shape as viewed from the -Y direction side. The biasing member 6113 is disposed in the recess 6127. Further, a protrusion 6128 for positioning the biasing member 613X and a protrusion 6129 for positioning the biasing member 613Z are provided in a protruding manner on the inner surface of the recess 6127. In the recess 6127, the end in the + X direction abuts on the inner surface of the recess 6127, and the end in the −X direction abuts on the contact surface 6114 of the biased member 6113. The member 613X is disposed along the + X direction. Similarly, in the recess 6127, the end on the −Z direction side abuts on the inner surface of the recess 6127, and the end on the + Z direction side abuts on the contact surface 6115 of the biasing member 6113. The member 613Z is disposed along the + Z direction.

The biasing members 613X bias the biasing members 6113 in the −X direction, and the biasing members 613Z bias the biasing members 6113 in the + Z direction.
When the biasing member 6113 is thus biased, the shaft 6112 contacts the inner surface 6125 on the −X direction side of the opening 6124 and contacts the inner surface 6126 on the + Z direction side of the opening 6124. Contact.

  Here, the opening 6124 is formed in a substantially rectangular shape as viewed from the -Y direction side as described above, the inner surface 6125 is a plane orthogonal to the + X direction, and the inner surface 6126 is in the + Z direction. It is an orthogonal plane. Therefore, the shaft portion 6112 is positioned without rattling by being biased by the biasing members 613X and 613Z against the inner surfaces 6125 and 6126. That is, the inner surface 6125 is a first positioning surface that determines the position of the shaft portion 6112 in the + X direction, and the inner surface 6126 is a second positioning surface that determines the position of the shaft portion 6112 in the + Z direction.

[Configuration of rotation drive unit]
11 and 12 are perspective views of the rotation drive unit 62 as viewed from the light incident side (−Z direction side) and the light emission side (+ Z direction side). FIGS. 13 and 14 are perspective views of the rotation drive unit 62 with the first holding member 621, the second holding member 622, and the substrate 623 omitted from the light incident side and the light emission side.
The rotation drive unit 62 rotates the light combining device 456 around a rotation axis Ry along the + Y direction. As shown in FIGS. 11 to 14, the rotation drive unit 62 includes a first holding member 621 and a second holding member 622, and a substrate 623 attached to the holding members 621 and 622, a motor 624, and a worm gear 625. A lead screw 626, a worm wheel 627, a first pulley 628, a timing belt 629, a tensioner 630, a second pulley 631, a shaft member 632, a photosensor 633 and a potentiometer 634, and a rotation member 635 fixed to the light combining device 456; Bias members 636 (636X, 636Z), 637, 638 are provided.

The first holding member 621 is fixed to a frame 71 described later by screws, and holds the configurations 623 to 634 together with the second holding member 622. As shown in FIGS. 11 and 12, the first holding member 621 holds the second holding member 622, the substrate 623, the motor 624, the + Z direction end of the lead screw 626, and the biasing member 637. Do. In addition, the end portion on the + Y direction side of the biasing member 637 which biases the rotating member 635 to the −Y direction side abuts on the first holding member 621.
The second holding member 622 is located on the −Z direction side with respect to the first holding member 621, and is combined with the first holding member 621. The second holding member 622 holds the end on the −Z direction side of the lead screw 626, the tensioner 630, the photo sensor 633, and the potentiometer 634.

The substrate 623 drives the motor 624 based on a control signal input from the control device.
The motor 624 is a drive device that generates a driving force that causes the rotation member 635 fixed to the light combining device 456 to rotate. A worm gear 625 is attached to a spindle (not shown) of the motor 624 as shown in FIGS. In the present embodiment, as the motor 624, a stepping motor for rotating a spindle in accordance with an input pulse signal is employed.
The worm gear 625 is disposed such that the rotation axis is along the + Y direction, and is rotated by the drive of the motor 624. The worm gear 625 is in mesh with the worm wheel 627. In addition to the worm gear 625, the lead screw 626, the worm wheel 627, and the pivoting member 635 are driven by the motor 624 to constitute a pivoting device that pivots the image forming unit FU around the pivot axis Ry.

The lead screw 626 is rotatably held by the first holding member 621 and the second holding member 622 so that the rotation axis can not move in the ± Z direction so that the rotation axis is along the + Z direction. The worm wheel 627 is fixed to the end on the + Z direction side of the lead screw 626, and the first pulley 628 is fixed to the end on the −Z direction side. As shown in FIG. 14, such a lead screw 626 has a spiral groove 6261 on the outer periphery substantially at the center in the + Z direction, and the spiral groove 6261 is in mesh with the rotation member 635. In addition, in the worm wheel 627, a no backlash gear is employed in order to suppress the occurrence of rattling with the worm gear 625.
Such a lead screw 626 is rotated together with the worm wheel 627 engaged with the worm gear 625 when the worm gear 625 is rotated. Thus, the pivoting member 635 engaged with the spiral groove 6261 is pivoted about the pivot axis Ry.
In addition, when the lead screw 626 is rotated, the first pulley 628 attached to the lead screw 626 is also rotated in the same direction.

The timing belt 629 is an annular belt connecting the first pulley 628 and the second pulley 631. The rotation of the first pulley 628 is transmitted to the second pulley 631 by the timing belt 629. That is, the timing belt is a transmission member that transmits the rotation of the first pulley 628 to the second pulley 631. In the present embodiment, a toothed belt (cogged belt) that engages with the teeth (or grooves) formed on the circumferential surfaces of the first pulley 628 and the second pulley 631 is employed as the timing belt 629. .
As shown in FIGS. 11 and 13, the tensioner 630 presses the timing belt 629 to suppress the occurrence of slack in the timing belt 629.
The second pulley 631 is fixed to the end on the −Z direction side of the shaft member 632. The second pulley 631 is a speed increasing gear with respect to the first pulley 628, and the rotation of the second pulley accompanying the rotation of the first pulley 628 is accelerated. That is, when the rotational force of the first pulley 628 is transmitted by the timing belt 629, the second pulley 631 is rotated more than the first pulley 628.

The shaft member 632 is disposed along the + Z direction so that the central axis is parallel to the lead screw 626, and is rotated together with the second pulley 631. As shown in FIGS. 11 and 14, the shaft member 632 is provided with a light shielding portion 6321 that shields the light receiving portion of the photosensor 633 attached to the second holding member 622.
The shaft member 632 is connected to a potentiometer 634 as shown in FIGS. 13 and 14, and the potentiometer 634 detects the amount of rotation of the shaft member 632 and thus the rotation position of the rotation member 635. Ru. The photosensor 633 and the potentiometer 634 correspond to a rotation detection unit.
The end on the + Z direction side of the shaft member 632 is formed in a spring shape that urges the opening (not shown) of the potentiometer 634 into which the end is inserted. Thereby, generation of rattling between the shaft member 632 and the inner surface of the opening is suppressed.

FIG. 15 is a perspective view of the lead screw 626 and the rotation member 635 as viewed from the light emission side (−Z direction side).
The pivoting member 635 is adhesively fixed to the surface 456U on the + Y direction side of the light combining device 456, and as the lead screw 626 rotates, the light combining device 456 and thus the image forming unit FU is rotated about the rotation axis Ry. Move it. As shown in FIG. 15, such a pivoting member 635 has a plate-like portion 6351 along the XZ plane, a shaft portion 6352, a biasing member 6353, a projecting portion 6356, and a meshing portion 6357.

The plate portion 6351 is formed in a substantially square plate shape when viewed from the + Y direction side, and the surface on the -Y direction side is adhesively fixed to the surface 456U.
The shaft portion 6352 projects from the approximate center of the plate portion 6351 in a cylindrical shape in the + Y direction. The shaft portion 6352 serves as a pivot axis Ry of the light combining device 456 (image forming unit FU). Further, the formation position of the shaft portion 6352 is a position according to the center of the light combining device 456 when viewed from the −Y direction side. Similar to the shaft portion 6112, a substantially rectangular parallelepiped biasing member 6353 is fixed to the tip of such a shaft portion 6352.

The biasing member 6353 is biased by the biasing member 636 (636X, 636Z) so that the shaft portion 6352 abuts on the inner surface of the opening 6212 of the first holding member 621.
A plurality of projecting portions 6356 project radially from the circumferential surface on the −Y direction side of the shaft portion 6352. The protrusions 6356 are portions for positioning the biasing member 637 (see FIGS. 12 to 14) whose end on the + Y direction side abuts the first holding member 621, and the coil is configured to surround the protrusions 6356. A biasing member 637, which is a spring, is disposed. When the end of the biasing member 637 on the -Y direction side abuts the surface on the + Y direction side of the plate-like portion 6351, the biasing member 637 is a pivoting member 635, and thus a light combining device 456 ( The image forming unit FU) is biased to the −Y direction side (the above-mentioned rotation support portion 61 side).

[Positioning of Shaft of Rotating Member]
16 and 17 are views of the rotation drive unit 62 as viewed from the + Y direction side. In addition to the illustration of the motor 624 being omitted in FIG. 16 and FIG. 17, the illustration of the biasing member 6353 is further omitted in FIG.
The shaft portion 6352 of the pivoting member 635 is also pressed and positioned by a plane orthogonal to the + X direction and a plane orthogonal to the + Z direction, as in the case of the shaft portion 6112.
Here, the first holding member 621 has a recess 6211 opening in the + Y direction side as shown in FIGS. 16 and 17, and is located at the bottom of the recess 6211 as shown in FIG. It has an opening 6212 which penetrates the first holding member 621 along the direction.
Among these, as shown in FIG. 17, the shaft 6352 is inserted into the opening 6212 from the −Y direction side, and the biasing member 6353 fixed to the tip of the shaft 6352 is shown in FIG. As shown in FIG. 17, it is disposed in the recess 6211.

Further, biasing members 636X and 636Z are disposed in the recess 6211.
In the biasing member 636 X, the end on the + X direction side abuts the inner surface of the recess 6211, and the end on the −X direction side abuts the abutment surface 6354 that is the + X direction side of the biasing member 6353. , Along the + X direction. The biasing member 636X biases the biased member 6353 in the −X direction.
The biasing member 636Z has an end on the −Z direction abut on the inner surface of the recess 6211 and an end on the + Z direction abuts on the abutting surface 6355 which is a surface on the −Z direction side of the biasing member 6353 Are arranged along the + Z direction. The biasing member 636Z biases the biasing member 6353 in the + Z direction.

When the biasing member 6353 is biased in the −X direction and the + Z direction by the biasing members 636X and 636Z, the shaft portion 6352 to which the biasing member 6353 is fixed is + Y as shown in FIG. Of the inner surface of the substantially square opening 6212 viewed from the direction side, the inner surface 6213, which is a plane orthogonal to the + X direction and located on the −X direction side, is orthogonal to the + Z direction and the + Z direction side Abut the inner surface 6214 which is a flat surface located on the
In this manner, the shaft portion 6352 is urged against the inner surfaces 6213 and 6214 by the urging members 636X and 636Z, and the shaft portion 6352 is positioned without rattling. That is, the inner surface 6213 functions as a first positioning surface which determines the position of the shaft portion 6352 in the + X direction, and the inner surface 6214 functions as a second positioning surface which determines the position of the shaft portion 6112 in the + Z direction.
The shaft portions 6112 and 6352 serving as the rotation axes Ry are biased in the −X direction by the biasing members 613X and 636X, and biased in the + Z direction by the biasing members 613Z and 636Z. That is, the shaft portions 6112 and 6352 are biased in the same direction.

[Configuration of the meshing portion of the pivoting member]
The meshing portion 6357 is a portion meshing with the spiral groove 6261 of the lead screw 626 as shown in FIG. 15, and is formed in a square cylindrical shape surrounding the lead screw 626 in the circumferential direction. That is, the engagement portion 6357 has an opening 6358 into which the lead screw 626 is inserted along the + Z direction.
When the lead screw 626 is rotated around the rotation axis along the + Z direction by meshing between the meshing portion 6357 and the spiral groove 6261, the rotation member 635 around the shaft portion 6352, and by extension, The light combining device 456 (image forming unit) is pivoted about the pivot axis Ry.
In addition, one end of the meshing portion 6357 abuts on the first holding member 621 (specifically, the holding portion that holds the end portion of the first holding member 621 on the -Z direction side of the lead screw 626), and the other end meshes. By the biasing member 638 abutting on the portion 6357, it is biased to the + Z direction side. As a result, the meshing portion 6357 and the spiral groove 6261 are always kept in contact with each other. Such a biasing member 638 is configured by a coil spring coaxially disposed with the lead screw 626 in the present embodiment.

FIG. 18 is a view showing a locus when the turning member 635A is turned, which is a deformation of the turning member 635. As shown in FIG. In FIG. 18, a dotted line indicates the locus of the portion ST1 on the side of the shaft portion 6352 at the inner edge of the opening of the meshing portion 6357A when the turning member 635A is rotated, and the opposite side to the shaft portion 6352 at the inner edge The locus of the portion ST2 of the is indicated by a dashed dotted line.
In such a meshing portion 6357, when the meshing portion with the spiral groove 6261 is a portion on the shaft portion 6352 (rotational axis Ry) side with respect to the lead screw 626, and at a portion on the opposite side to the shaft portion 6352 The amount of rotation (rotation angle) of the rotation member 635 differs depending on the case. This will be described using a pivoting member 635A which is a modification of the pivoting member 635.
The pivoting member 635A has the same configuration as the pivoting member 635 except that it has a meshing portion 6357A in place of the meshing portion 6357 as shown in FIG.
Similarly to the meshing portion 6357, the meshing portion 6357A is formed in a square cylindrical shape surrounding the lead screw 626 in the circumferential direction, and an opening portion through which the lead screw 626 is inserted along the + Z direction, Teeth (not shown) meshing with the spiral groove 6261 are formed along the outer periphery. Therefore, the meshing portion 6357A can mesh with the spiral groove 6261 at a portion ST1 on the side of the shaft portion 6352 with respect to the lead screw 626 for inserting the meshing portion 6357A and at a portion ST2 on the opposite side to the shaft portion 6352 It is.

When the portion ST2 is rotated by the size L in the + Z direction by the rotation of the lead screw 626 in a state in which the meshing portion 6357A and the spiral groove 6261 mesh with each other at the portion ST2, the rotation member 635A Is rotated in the + Z direction about the rotation axis Ry.
On the other hand, in a state in which the meshing portion 6357A and the spiral groove 6261 mesh at the portion ST1, when the portion ST1 is rotated by the dimension L in the + Z direction by the rotation of the lead screw 626, the rotation member 635A is An angle α larger than the angle β is rotated in the + Z direction about the rotation axis Ry. This is because the portion on the side of the shaft portion 6352 in the meshing portion 6357A and the portion on the opposite side to the shaft portion 6352 are also integrated with the plate-like portion 6351 in which the shaft portion 6352 is provided. is there.

  As described above, when the portion ST1 on the side of the shaft portion 6352 engages with the spiral groove 6261 with respect to the lead screw 626, as compared with the case where the portion ST2 opposite to the shaft portion 6352 engages with the spiral groove 6261, The amount of rotation (rotation angle) of the rotation member 635A is increased. Then, when the amount of rotation of the rotation member 635A with respect to the amount of rotation of the lead screw 626 becomes large, it becomes difficult to finely adjust the inclination of the rotation member 635A and hence the light combining device 456. In other words, when the portion ST2 is configured to mesh with the spiral groove 6261, the amount of rotation of the rotation member 635A with respect to the amount of rotation of the lead screw 626 can be reduced. The inclination of 456 can be finely adjusted.

FIG. 19 is a view showing the formation positions of the teeth 6359 meshing with the spiral groove 6261 in the meshing portion 6357 of the rotation member 635. As shown in FIG. In other words, FIG. 19 is a cross-sectional view along the XZ plane of the lead screw 626 and the pivoting member 635 at a portion where the spiral groove 6261 and the tooth 6359 mesh. FIG. 20 is a view of the rotating member 635 as viewed from the light incident side (−Z direction side).
In the present embodiment, as shown in FIGS. 19 and 20, in the opening 6358 of the meshing portion 6357, a portion ST2 opposite to the shaft portion 6352 (rotational axis Ry) with respect to the lead screw 626 is provided. While the tooth 6359 which meshes with the spiral groove 6261 is formed, the tooth 6359 is not formed at the portion ST1 on the shaft portion 6352 side. For this reason, the meshing portion 6357 always meshes with the spiral groove 6261 at the portion ST2. Thus, the amount of rotation of the rotating member 635 with respect to the amount of rotation of the lead screw 626 can be reduced, and the amount of rotation of the rotating member 635 can be finely adjusted.

[Configuration of Second Rotating Unit]
FIG. 21 is a view of the attitude adjustment device 5 with the first rotation unit 6 and the light combining device 456 removed, as viewed from the light incident side (−Z direction side), and FIG. It is the perspective view seen from the light-incidence side.
The second rotation unit 7 supports the first rotation unit 6 and is supported by the support member 8, and the entire rotation of the first rotation unit 6 and hence the image forming unit FU is a rotation axis Rx along the + X direction. , And is equivalent to an X rotation unit. As shown in FIGS. 21 and 22, the second pivoting portion 7 includes a frame 71, a pivoting mechanism 72 for pivoting the frame 71, and a seal disposed between the frame 71 and the support member 8. And a stop member 74.
Among these, the sealing member 74 seals the gap between the frame 71 and the support member 8, and the space in the −Z direction side from the space on the + Z direction side with respect to the support member 8 via the gap Intrusion of a gas containing dust and the like into the space on the side where the image forming unit FU is arranged is suppressed. The sealing member 74 is formed of a material having elasticity, in a rectangular frame shape as viewed from the -Z direction side, and has a substantially U-shaped cross section.

[Frame configuration]
The frame 71 supports the first pivoting portion 6 and is formed in a substantially rectangular shape long in the + Y direction when viewed from the −Z direction side. The frame 71 is formed with a recess (not shown) opened in the + Z direction side, and a holding member TM for holding an optical component MN such as a retardation plate is disposed in the recess.
Such a frame 71 has an opening 711, attachment portions 712 and 713, shaft portions 714 and 715, and an engagement portion 716.

The opening 711 is an opening through which the image light emitted from the light combining device 456 passes along the + Z direction. The opening 711 is formed in a rectangular shape substantially at the center of the frame 71.
The attachment portions 712 and 713 are provided at positions sandwiching the opening 711 in the + Y direction. Among these, the first holding member 621 of the rotation drive unit 62 is attached to the attachment portion 712 located on the + Y direction side, and the attachment portion 713 located on the −Y direction side of the rotation support portion 61 The connecting member 612 is attached.

The shaft portions 714 and 715 are portions that form the pivot axis Rx of the frame 71. Among these, the shaft portion 714 is cylindrically protruded from the side surface 71L on the + X direction side of the frame 71, and the shaft portion 715 is cylindrically protruded from the side surface 71R on the −X direction side. The shaft portions 714 and 715 are inserted from the −Z direction side into the groove portion 82 (FIG. 22) along the + X direction formed in the support member 8, and then the pressing member PM covers the shaft portions 714 and 715. By being attached to the support member 8 from the −Z direction side, the frame 71 is supported by the support member 8 so as to be rotatable about the shaft portions 714 and 715.
Here, the formation positions of the shaft portions 714 and 715 in the frame 71 are the image forming units when the central axes of the shaft portions 714 and 715 are viewed along the + Z direction with the frame 71 not rotated. The positions are set to connect the centers of the image forming areas (modulation areas) of the liquid crystal panels 454 of the light modulation devices 452 B and 452 R constituting the FU.

  The engaging portion 716 protrudes from the side surface 71U on the + Y direction side of the frame 71 to the + Y direction side, and engages with the rotation mechanism 72. More specifically, the engaging portion 716 has a female screw hole 7161 penetrating the engaging portion 716 in the + Z direction, and a lead screw 726 constituting the rotation mechanism 72 is inserted into the female screw hole 7161. Then, the lead screw 726 is rotated and the engagement portion 716 is moved along the + Z direction, whereby the frame 71 is rotated about the shaft portions 714 and 715.

[Configuration of rotation mechanism]
23 and 24 are perspective views showing the turning mechanism 72 in an enlarged manner. More specifically, FIG. 23 is a perspective view of the turning mechanism 72 as viewed from the light incident side (−Z direction side), and FIG. 24 is a perspective view as viewed from the light emission side (+ Z direction side). In FIG. 23 and FIG. 24, the holding member 721 constituting the turning mechanism 72 is not shown.
The rotation mechanism 72 has the same configuration as the rotation drive portion 62, moves the engagement portion 716 in the ± Z direction, and rotates the frame 71 around the rotation axis Rx, Thus, the image forming unit FU is pivoted about the pivot axis Rx. Such a rotation mechanism 72 has a holding member 721 as shown in FIGS. 21 and 22, and as shown in FIGS. 23 and 24, a motor 724, a worm gear 725, a lead screw 726, a worm wheel 727, It has a first pulley 728, a timing belt 729, a tensioner 730, a second pulley 731, a shaft member 732, a photo sensor 733 and a potentiometer 734.

The holding member 721 holds the above configurations 723 to 734 and is attached to the support member 8.
The motor 724 is a stepping motor that is driven according to the input pulse signal, and is a driving device that generates a driving force that rotates the frame 71. The motor 724 is arranged such that a spindle (not shown) is along the + X direction.
The worm gear 725 is attached to the spindle of the motor 724. In the same manner as described above, the worm gear 725, the lead screw 726, the worm wheel 727, and the frame 71 constitute a rotating device for rotating the image forming unit FU.

The lead screw 726 is an axial member disposed along the + Z direction, and is supported by the holding member 721 so as to be pivotable about a pivot axis along the + Z direction in a state where it can not move in the ± Z direction. Ru. The worm wheel 727 is fixed to the end of the lead screw 726 on the + Z direction side, and the first pulley 728 is fixed to the end on the −Z direction side. At the center of the lead screw 726 in the + Z direction, a spiral groove 7261 which meshes with the female screw hole 7161 of the engaging portion 716 is formed.
Then, when the motor 724 is driven and the worm gear 725 is rotated, the lead screw 726 is rotated integrally with the worm wheel 727 engaged with the worm gear 725. Thereby, the frame 71 (engaging portion 716) engaged with the lead screw 726 is moved in the ± Z direction, and the frame 71 is rotated as described above.

In the meshing portion 6357 of the rotation member 635, the tooth 6359 meshing with the spiral groove 6261 of the lead screw 626 is provided only on the opposite side of the lead screw 626 to the shaft portion 6352. On the other hand, in the engaging portion 716 of the frame 71, the teeth of the female screw hole 7161 are formed on the entire inner periphery of the female screw hole 7161.
Since the meshing portion 6357 and the spiral groove 6261 mesh at a position relatively close to the shaft portion 6352, the position of the tooth 6359 with respect to the spiral groove 6261 greatly changes the rotation amount of the rotation member 635. On the other hand, since the female screw hole 7161 and the spiral groove 7261 mesh with each other at a position relatively away from the shaft portions 714 and 715, even if the spiral groove 7261 meshes with any portion of the female screw hole 7161, This is because there is no large difference in the amount of rotation of the frame 71.

The timing belt 729 is a toothed belt that connects the first pulley 728 and the second pulley 731 and transmits the rotation of the first pulley 728 to the second pulley 731.
The tensioner 730 presses the timing belt 729 to suppress the occurrence of slack in the timing belt 729.

The second pulley 731 is, like the second pulley 631, an acceleration gear for the first pulley 728, and when the rotation of the first pulley 728 is transmitted by the timing belt 729, more than the first pulley 728. It is pivoted.
The shaft member 732 is disposed along the + Z direction such that the central axis is parallel to the lead screw 726. The shaft member 732 is provided with a light shielding portion 7321 that shields the light receiving portion of the photo sensor 733 disposed on the + Y direction side with respect to the shaft member 732.
The shaft member 732 is connected to a potentiometer 734. The potentiometer 734 detects the amount of rotation of the shaft member 732 and thus the rotation position of the frame 71.

In such a pivoting mechanism 72, when the worm gear 725 attached to the motor 724 is pivoted about a pivot along the + X direction, the lead screw 726 is rotated along with the worm wheel 727 engaged with the worm gear 725. Be moved. Since the spiral groove 7261 of the lead screw 726 is engaged with the female screw hole 7161 of the engaging portion 716, the engaging portion 716 is moved in the ± Z direction, whereby the frame 71 is formed into the shaft portion 714, 715 is pivoted about the pivot axis Rx.
In addition, the rotation of the lead screw 726 is transmitted to the shaft member 732 provided with the second pulley 731 via the first pulley 728 and the timing belt 729. The pivoting of the shaft member 732 is detected by a potentiometer 734. Further, the detection result of the photo sensor 733 by the light shielding portion 7321 provided on the shaft member 732 is used for returning the frame 71 to the origin.

[Configuration of support member]
The support member 8 supports the second rotation portion 7 and further supports the first rotation portion 6 and the image forming unit FU, and as shown in FIG. It is formed in a substantially rectangular shape long in the direction. The support member 8 has an opening 81, a groove 82, attachment portions 83, 84, 85 and a fixing portion 86.
The opening 81 is formed in a rectangular shape that is long in the + Y direction at the center of the support member 8 so as to penetrate the support member 8 in the + Z direction. The opening 81 is an opening through which the image light emitted from the image forming unit FU passes, and the image light is incident on the projection optical device 46 attached to the support member 8.

  The groove 82 is formed along the + X direction at each position on the + X direction side and the −X direction side with respect to the opening 81. The shaft portions 714 and 715 are inserted into the grooves 82 from the −Z direction side. The pressing member PM is attached to the support member 8 so as to cover the shaft portions 714 and 715 from the −Z direction side, whereby the frame 71 is rotatably supported by the support member 8.

The attachment portions 83 are provided at four corners of the opening 81 formed in a rectangular shape. Biasing members BMZ that bias the frame 71 in the −Z direction are attached to the attachment portions 83, respectively.
The attachment portion 84 is provided on the + X direction side with respect to the opening 81 and at two positions sandwiching the groove 82 in the + Y direction, and on the −X direction side with respect to the opening 81 and with respect to the groove 82 One is provided at the position on the + Y direction side. Among these, in the mounting portion 841 positioned on the + X direction side and the + Y direction side, a biasing member BMX for biasing the frame 71 to the −X direction side, and the frame 71 to the −Y direction side A biasing member BMY for biasing is attached. Further, a biasing member BMX that biases the frame 71 in the −X direction is attached to the attachment portion 842 positioned on the + X direction side and the −Y direction side. Furthermore, a biasing member BMY for biasing the frame 71 in the -Y direction is attached to the mounting portion 843 positioned on the -X direction side. By these biasing members BMX, BMY and BMZ, rattling of the frame 71 in which the shaft portions 714 and 715 are disposed in the groove portion 82 is suppressed.

The mounting portion 85 is located on the side surface of the support member 8 in the + Y direction. The rotation mechanism 72 (holding member 721) is attached to the attachment portion 85.
The fixing portion 86 extends from the end of the support member 8 in the −Y direction to the + Z direction. The fixing portion 86 is a portion for fixing the support member 8 to a base member (not shown) provided in the exterior housing 2 along the bottom surface portion.

According to the projector 1 according to the embodiment described above, the following effects can be achieved.
The meshing portion 6357 of the rotation member 635, which is integrally rotated with the light combining device 456 constituting the image forming unit FU, is a portion on the side opposite to the shaft portion 6352 (rotational axis Ry) with respect to the lead screw 626. At ST2, the lead screw 626 is engaged. According to this, compared with the case where the meshing portion 6357 meshes with the lead screw 626 at the portion ST1 on the shaft portion 6352 (rotational axis Ry) side, the rotation member 635 with respect to the rotation amount of the lead screw 626 The amount of rotation (rotational angle) can be reduced. Therefore, it is possible to finely adjust the amount of rotation of the light combining device 456 which is the rotation target, and hence the image forming unit FU. Further, as a result, the lead screw 626 and the meshing portion 6357 can be disposed at a position close to the rotation axis Ry, so that the posture adjustment device 5 and hence the projector 1 can be miniaturized.

  The lead screw 626 has a helical groove 6261 formed along the outer periphery. The meshing portion 6357 has a tooth 6359 meshing with the spiral groove 6261. The tooth 6359 is located on the opposite side of the lead screw 626 from the shaft portion 6352 (rotational axis Ry). According to this, in the meshing portion 6357, the portion meshing with the lead screw 626 can be reliably set to the portion ST2. Therefore, the above effects can be reliably achieved.

  The meshing portion 6357 is formed to surround the lead screw 626 along the outer periphery. According to this, it can be suppressed that the meshing between the lead screw 626 and the meshing portion 6357 is released due to any factor. Therefore, the lead screw 626 and the meshing portion 6357 can be meshed reliably.

The rotation drive unit 62 provided in the first rotation unit 6 of the posture adjustment device 5 includes a first pulley 628, a timing belt 629, a second pulley 631, a shaft member 632, in addition to the lead screw 626 and the rotation member 635. It has a photo sensor 633 and a potentiometer 634. Among them, the first pulley 628 is integrally provided with the lead screw 626, and the shaft member 632 in which the second pulley 631 is integrally provided is disposed such that the rotation axis is parallel to the lead screw 626. . Further, the timing belt 629 as a transmission member transmits the rotation of the first pulley 628 to the second pulley 631 (and consequently the shaft member 632), and the photo sensor 633 and the potentiometer 634 as a rotation detection unit The rotation is detected, which in turn detects the rotation of the image forming unit FU. In such a rotation drive unit 62, the rotation of the lead screw 626 is transmitted to the shaft member 632 via the first pulley 628, the timing belt 629 and the second pulley 631 and the rotation of the shaft member 632 is It is detected by the photo sensor 633 and the potentiometer 634. According to this, the amount of rotation of the lead screw 626 can be detected by the photosensor 633 and the potentiometer 634 arranged at a position away from the lead screw 626. Therefore, the freedom of arrangement of the photosensor 633 and the potentiometer 634 can be improved, and the photosensor 633 and the potentiometer 634 can be disposed so as not to interfere with the pivoting member 635 and the image forming unit FU.
The same effect as described above can also be achieved by the second pivoting unit 7 having the same configuration as the pivoting drive unit 62.

The second pulley 631 accelerates the rotation transmitted from the first pulley 628 by the timing belt 629. For this reason, the shaft member 632 provided with the second pulley 631 is rotated more than the first pulley 628. According to this, the amount of rotation of the shaft member 632 can be easily detected by the potentiometer 634, and the amount of rotation of the lead screw 626, and hence the amount of rotation (rotation angle) of the rotation member 635 and the image forming unit FU. Detection accuracy can be enhanced. Therefore, the amount of rotation of the light combining device 456 which is the target of rotation can be detected in more detail.
The same effect as described above can also be achieved by the second pivoting unit 7 having the same configuration as the pivoting drive unit 62.

The rotation drive portion 62 engages with the shaft member 632 as a rotation detection portion, and a potentiometer 634 for detecting the amount of rotation of the shaft member 632 and the light shielding portion 6321 according to the rotation of the shaft member 632 And a photosensor 633 that can be shielded. According to this, based on the detection result by the potentiometer 634, it is possible to detect the amount of rotation (rotational angle) of the rotating member 635 and hence the light combining device 456 (image forming unit FU). Further, based on the detection result by the photosensor 633 with high detection accuracy, the light combining device 456 (image forming unit) can be returned to the origin position with high accuracy.
The same effect as described above can also be achieved by the second pivoting unit 7 having the same configuration as the pivoting drive unit 62.

  As described above, the rotation drive unit 62 includes the timing belt 629 as a transmission member and also includes a tensioner 630 that presses the timing belt 629 to suppress the occurrence of slack in the timing belt 629. According to this, the rotation of the first pulley 628 can be transmitted to the second pulley 631 and thus to the shaft member 632 without loss. Therefore, by detecting the amount of rotation of the shaft member 632, the amount of rotation of the lead screw 626 and thus the image forming unit can be detected accurately and reliably.

[Modification of the embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like as long as the object of the present invention can be achieved are included in the present invention.
In the above embodiment, the screw groove 626 is meshed with the lead screw 626 in order to set the meshing portion with the lead screw 626 to the portion ST2 on the opposite side to the shaft portion 6352 serving as the rotation axis Ry. The tooth 6359 is formed at the portion ST2 and is not formed at the portion ST1 on the shaft portion 6352 side. However, the configuration of the meshing portion and the lead screw is not limited to this, as long as the meshing portion 6357 can set the meshing portion with the lead screw 626 to the portion on the opposite side to the rotation axis Ry with respect to the lead screw 626. Other configurations are also possible.

For example, it is good also as composition which cut off a part by the side of axial part 6352 (rotation axis Ry) in meshing part 6357 formed in square cylinder shape. That is, the meshing portion 6357 may be formed in a substantially U shape opening on the shaft portion 6352 side as viewed along the + Z direction, and the teeth 6359 may be located in the substantially U-shaped inner portion. For this reason, the shape of the meshing portion 6357 does not have to be a substantially square cylinder, and may be cylindrical, semi-cylindrical (arc-shaped), or half-half columnar.
Also, for example, when the lead screw 626 and the meshing portion 6357 are viewed along the central axis of the lead screw 626, the center of the opening where the lead screw 626 is inserted in the meshing portion 6357 The center may be offset to the opposite side to the rotation axis Ry. In this case, the lead screw 626 can be brought into contact with the portion ST2 opposite to the rotational axis Ry in the meshing portion 6357.
Further, at this time, an urging member for urging the lead screw 626 in the direction in which the lead screw 626 separates from the rotation axis Ry (direction approaching the part ST2), and the meshing portion 6357 is attached to the rotation axis Ry side. A biasing member may be provided to bias.
These configurations may be combined with the configurations described above.

  In the above embodiment, the rotation drive unit 62 constituting the first rotation unit 6 of the posture adjustment device 5 includes the first pulley 628, the timing belt 629, and the second pulley 631 in addition to the lead screw 626 and the rotation member 635. , A shaft member 632, a photo sensor 633, and a potentiometer 634. Similarly, in addition to the frame 71 and the lead screw 726, the second rotation unit 7 is configured to have a first pulley 728, a timing belt 729, a second pulley 731, a shaft member 732, a photo sensor 733, and a potentiometer 734. The photo sensors 633 and 733 and the potentiometers 634 and 734 detect the rotation of the shaft members 632, 732 to detect the rotation amount (rotation angle) of the light combining device 456 (and thus the image forming unit FU), and It was supposed to detect the position. However, the present invention is not limited to this, and a rotation detection unit such as a photo sensor and a potentiometer may directly detect the rotation amount of the lead screws 626 and 726, and the rotation amount and rotation angle of the light combining device 456 and the image forming unit FU. May be detected directly. Further, the present invention is not limited to the configuration having each of the photo sensor and the potentiometer, and may be configured to have any of these.

  In the above embodiment, the second pulleys 631 and 731 accelerate rotation of the first pulleys 628 and 728. However, not limited to this, the second pulleys 631 and 731 may not accelerate the rotation. Further, another pulley may be provided between the first pulley and the second pulley, and the rotation of the first pulley may be transmitted to the second pulley via the other pulley.

In the above embodiment, the posture adjustment device 5 is a photosensor that detects the rotation of the shaft members 632, 732 as a rotation detection unit that detects the amount of rotation (rotation angle) of the light combining device 456 (image forming unit FU). 633 and 733 and potentiometers 634 and 734 are provided. However, the present invention is not limited to this, and the inclination detection device may be configured to detect the amount of rotation and the rotation angle of the light combining device 456 (image forming unit FU) by another sensor or the like.
Also, for example, the connecting member 612 or the first holding member 621 may have a detection unit that detects the amount of rotation and the rotation angle of the rotation members 611 and 635, and the supporting member 8 And you may have a detection part which detects a rotation angle.

In the above embodiment, the first rotation portion 6 of the posture adjustment device 5 has the timing belt 629 as a transmission member for transmitting the rotation of the first pulley 628 to the second pulley 631 and presses the timing belt 629. With a tensioner 630. However, it is not limited to this. That is, the transmission member may have a configuration other than the timing belt 629, and may be, for example, a chain. The tensioner 630 may not necessarily be provided, and another configuration may be adopted as long as generation of slack of the transmission member such as a timing belt can be suppressed.
The same applies to the timing belt 729 and the tensioner 730 which the second rotation unit 7 has.

  In the above embodiment, the posture adjustment device 5 centers the second rotation unit 7 that rotates the image forming unit FU about the rotation axis Rx parallel to the + X direction, and the rotation axis Ry parallel to the + Y direction. And a first rotation unit 6 for rotating the image forming unit FU. However, the present invention is not limited to this, as long as the posture adjustment device rotates the image forming unit FU about at least one of the rotation axes Rx and Ry. In addition, the rotation axis of the image forming unit FU may not be parallel to the + X direction or the + Y direction.

  In the above embodiment, the first and second pivoting units 6 and 7 have the motors 624 and 724 that are driven according to the control signal input from the control device. However, the present invention is not limited to this, and at least one of the first rotation unit 6 and the second rotation unit 7 may be configured to rotate the image forming unit FU manually by an adjuster such as a user. In this case, for example, instead of the motors 624 and 724, a dial may be provided, and a part of the dial may be exposed to the outside of the exterior housing 2. Motors 624 and 724 are not limited to stepping motors, and may be actuators having other configurations.

In the above embodiment, the projector 1 includes the three light modulation devices 452 (452 B, 452 G, and 452 R). However, the present invention is not limited to this, and the present invention is applicable to a projector provided with two or more light modulation devices and a light combining device that combines lights emitted from these light modulation devices.
In the embodiment described above, the image projection device 4 has a configuration in which the optical component is disposed at the position shown in FIG. However, the present invention is not limited to this, and the optical components that constitute the image projection device 4 and the layout of the optical components can be changed as appropriate.
In the above embodiment, the light modulation device 452 has the transmission type liquid crystal panel 454 in which the light incident surface and the light emission surface are different. However, the present invention is not limited to this, and the light modulation device may be configured to have a reflective liquid crystal panel in which the light incident surface and the light emission surface are the same. In addition, as long as it is a light modulation device capable of modulating an incident light beam to form an image according to image information, devices using micro mirrors, for example, devices using DMD (Digital Micromirror Device), etc. other than liquid crystal A light modulator may be used. In this case, instead of the three light modulation devices 452 described above, three light modulation devices respectively configured by DMDs may be adopted for the projector 1.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 41 ... Light source device, 452 (452B, 452G, 452R) ... Light modulation apparatus, 456 ... Light combining apparatus, 46 ... Projection optical apparatus, 5 ... Posture adjustment apparatus, 626 ... Lead screw (rotation apparatus), 6261 ... Helical groove, 628 ... first pulley, 629 ... timing belt (transmission member), 630 ... tensioner, 631 ... second pulley, 632 ... shaft member, 6321 ... light shielding portion, 633 ... photosensor (rotation detection portion), 634: Potentiometer (rotational detector), 635: Rotating member, 6357: Meshing portion, 6359: Tooth, Ry: Rotating shaft.

Claims (7)

A light source device,
A plurality of light modulation devices that respectively modulate the light emitted from the light source device;
A light combining device that is integrated with the plurality of light modulation devices and that combines light incident from each of the plurality of light modulation devices;
A projection optical device that projects the light combined by the light combining device;
An attitude adjustment device for adjusting the attitude of the light combining device;
The posture adjustment device
A rotating member integrally provided in the light combining device;
And a pivoting device for pivoting the pivoting member about the pivoting axis set in advance and pivoting the light combining device together with the pivoting member.
The rotation device includes a lead screw whose rotation axis is parallel to an axis orthogonal to the rotation axis,
The rotating member has a meshing portion that meshes with the lead screw,
The projector according to claim 1, wherein the meshing portion meshes with the lead screw at a portion of the lead screw opposite to the pivot shaft. In the projector according to claim 1,
The lead screw has a helical groove formed along the outer periphery,
The meshing portion has a tooth meshing with the spiral groove,
The projector is characterized in that the teeth are located on the side opposite to the rotating shaft with respect to the lead screw. In the projector according to claim 1 or 2,
The projector according to claim 1, wherein the meshing portion is formed to surround the lead screw along an outer periphery thereof. The projector according to any one of claims 1 to 3.
The posture adjustment device
A first pulley integrally provided with the lead screw;
A shaft member arranged so that the lead screw and the rotation axis are parallel to each other;
A second pulley integrally provided on the shaft member;
A transmission member for transmitting the rotation of the first pulley to the second pulley;
And a rotation detection unit configured to detect rotation of the shaft member. In the projector according to claim 4,
The projector according to claim 1, wherein the second pulley accelerates the rotation transmitted by the transmission member from the first pulley. In the projector according to claim 4 or 5,
The rotation detection unit is
A potentiometer which engages with the shaft member to detect the amount of rotation of the shaft member;
A projector comprising: at least one of a photo sensor which can be shielded by a light shielding portion provided on the shaft member in response to rotation of the shaft member. The projector according to any one of claims 4 to 6.
The transmission member is a timing belt,
The projector according to claim 1, wherein the posture adjustment device includes a tensioner that presses the timing belt to suppress the occurrence of slack in the timing belt.

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