WO2016067580A1

WO2016067580A1 - Optical compensation element adjusting mechanism and projector

Info

Publication number: WO2016067580A1
Application number: PCT/JP2015/005345
Authority: WO
Inventors: 飯沼　和幸
Original assignee: セイコーエプソン株式会社
Priority date: 2014-10-27
Filing date: 2015-10-23
Publication date: 2016-05-06

Abstract

One of the purposes of the present invention is to provide an optical compensation element adjusting mechanism and a projector which are able to adjust a tilt of an optical compensation element with high accuracy. The optical compensation element adjusting mechanism is provided with: an optical compensation element which optically compensates for a liquid crystal panel; and an adjustment frame which adjusts the angle of the optical compensation element with respect to the liquid crystal panel. The adjustment frame is provided with: a substantially rectangular holding section which holds the optical compensation element; a pair of fixing sections which extend from diagonal positions on the holding section toward a direction intersecting the holding section, and are fixed to a first holding member to which the adjustment frame is mounted; and an adjustment section which is disposed at a position apart from the pair of the fixing sections, and tilts the holding section around a virtual line connecting the pair of the fixing sections to tilt the optical compensation element.

Description

Optical compensation element adjustment mechanism and projector

The present invention relates to an optical compensation element adjustment mechanism and a projector.

2. Related Art A projector is conventionally known that includes a light source device, a light modulation device that modulates the light emitted from the light source device, and a projection optical device that projects the modulated light. As such a projector, for the purpose of improving the contrast of a projection image, a projector provided with an optical compensation element on the light emission side of a liquid crystal panel as a light modulation device has been proposed (for example, see Patent Document 1). .

The projector described in Patent Document 1 includes a compensation element adjustment mechanism that adjusts the tilt posture of the optical compensation element with respect to the liquid crystal panel.
Specifically, the compensation element adjusting mechanism includes a frame supporting the optical compensation element, a holder member to which the frame is attached, a fixing member, and a fixing sheet metal.

Among these, the frame is provided with a lever member used for angle adjustment.
The holder member has a first bonding portion located on one side to which the liquid crystal panel is bonded, and a second bonding portion located on the other side to which the polarizing filter is attached, and between the bonding portions, A space in which the frame is accommodated is formed. In addition, a slit-like support groove is formed in each side wall connecting each joint, and a shaft member formed on the lower left of the front of the frame fits into one of the support grooves with a predetermined slack. In the other support groove, the shaft member formed on the front lower right of the frame engages with the same slack. Under the present circumstances, since the collar part formed in the edge part of each axial member cooperates and controls movement of a frame about the horizontal direction parallel to the principal surface of an optical compensation element, a frame becomes smooth in a holder member. It becomes rotatable. A fixing sheet metal is attached to the light emission side of such a holder member.
The fixing member is attached to the top of the first joint of the holder member. The fixing member has a pair of protrusions serving as rails, and the lever member is sandwiched by the protrusions to stabilize the posture of the frame and finely adjust the posture of the frame and the optical compensation element. Is possible.
Then, the frame is rotated by the operation on the lever member, and the inclination attitude of the optical compensation element is adjusted, and then the frame and the holder member are fixed by the adhesive.

JP, 2009-42262, A

However, since the compensation element adjustment mechanism described in Patent Document 1 has a complicated configuration in which a plurality of members are combined, the manufacturing cost of the compensation element adjustment mechanism is relatively high. Therefore, there has been a demand for a configuration that can reduce the manufacturing cost with a simple configuration.

An object of the present invention is to provide an optical compensation element adjustment mechanism and a projector capable of adjusting the position of the optical compensation element with a simple configuration.

An optical compensation element adjustment mechanism according to a first aspect of the present invention includes an optical compensation element that optically compensates a light modulation device, and an adjustment frame that adjusts an angle of the optical compensation element with respect to the light modulation device. The adjustment frame extends from the substantially rectangular holding portion for holding the optical compensation element and the substantially diagonal position of the holding portion in the direction crossing the holding portion, and the attachment member to which the adjustment frame is attached The optical compensation element is arranged by inclining the holding portion around a virtual line which is disposed at a position separated from the pair of fixing portions and the pair of fixing portions fixed respectively to the pair of fixing portions. And an adjusting unit that tilts.

According to the first aspect, in the adjustment frame, the holding portion for holding the optical compensation element is fixed to the mounting member by the two fixing portions. Then, the holding portion is inclined by the adjusting portion, whereby the holding portion is rotated with the virtual line as a rotation axis, and the amount of inclination of the optical compensation element with respect to the mounting member is adjusted. According to this, the inclination amount of the optical compensation element with respect to the light modulation device is adjusted by adjusting the inclination amount of the holding portion that holds the optical compensation element with respect to the attachment member disposed at the appropriate position with respect to the light modulation device. Can be adjusted properly. In such a configuration, since the adjustment frame can be configured as an integral part, the optical compensation element adjustment mechanism with a simple configuration can be configured as compared with the case where the plurality of members are combined. Therefore, the position of the optical compensation element can be adjusted by the adjustment frame with a simple configuration.

In the first aspect, it is preferable that the adjusting unit incline the holding unit by being moved in a direction approaching the mounting member.
According to the first aspect, by moving the adjusting portion in the direction in which the adjusting portion approaches the mounting member, it is possible to easily adjust the tilt amount of the holding portion and hence the optical compensation element. Therefore, the position adjustment of the optical compensation element can be easily performed.

In the first aspect, the adjusting unit has a hole through which the insertion member inserted into the mounting member is inserted, and the movement amount with respect to the mounting member is in accordance with the insertion amount of the insertion member into the mounting member. It is preferable that the amount of inclination of the said holding | maintenance part is adjusted by being adjusted.
In addition, as an insertion member, the screw screwed by an attachment member can be illustrated.
According to the first aspect, when the insertion amount of the insertion member increases, the adjustment unit is moved in the direction approaching the attachment member, so that the inclination amount of the optical compensation element can be easily adjusted, and the insertion amount The position of the optical compensation element can be finely adjusted by adjusting. Therefore, the position of the optical compensation element can be easily adjusted with a simple configuration, and the position of the optical compensation element can be finely adjusted even after the adjustment frame is fixed to the mounting member.

In the first aspect, it is preferable that the holding portion biases the insertion member in a direction opposite to the insertion direction by being inclined by the adjustment portion.
According to the first aspect, the holding portion biases the insertion member in the direction opposite to the insertion direction when being inclined according to the insertion of the insertion member. Thereby, the amount of inclination of the holding portion can be set to a value corresponding to the amount of insertion of the insertion member, and the inclined state of the holding portion can be maintained.

In the first aspect, it is preferable that the adjusting unit be provided in the vicinity of a corner different from an arrangement position of the pair of fixing units in the holding unit.
In the first aspect, the fixing portions are provided at two corner portions in a diagonal relationship of the substantially rectangular holding portion, and the adjustment portion is provided in the vicinity of the other corner portions. According to this, the position of the adjustment unit is separated from the virtual line. As a result, for example, the torque can be increased when the force for rotating the holding unit with the virtual line as the rotation axis acts on the adjusting unit, so that the holding unit can be easily turned. Therefore, the position adjustment of the optical compensation element can be performed more easily.

In the first aspect, the adjustment portion is formed to extend from the adjustment frame to the outer peripheral side, and the adjustment portion is a first contact portion that abuts on the attachment member, and the optical in the attachment member It is preferable to have a second contact portion on which a moving member moving substantially parallel to a surface facing the compensation element is brought into contact, and the first contact portion has flexibility.
In addition, as a moving member, the screw etc. which are screwed by an attachment member can be illustrated.
According to the first aspect, the second contact portion moves according to the movement of the moving member, and the first contact portion bends according to the movement of the second contact portion. When the part is moved by the moving member as much as possible, the holding part is maximally inclined. According to this, the position of the optical compensation element can be adjusted by the adjustment frame with a simple configuration. In addition, since the moving member moves substantially parallel to the surface of the mounting member facing the optical compensation element, for example, even when the moving member is covered by another member (for example, the output side polarizing plate), the moving member is moved It can be done. Therefore, even after the optical compensation element adjustment mechanism is assembled, the position of the holding portion and the optical compensation element held by the holding portion can be adjusted.

In the first aspect, it is preferable that the amount of tilt of the holding portion be adjusted in accordance with the amount of movement of the moving member in a state of being in contact with the second contact portion.
According to the first aspect, the tilt amount of the optical compensation element can be easily adjusted, and the position of the optical compensation element can be finely adjusted by adjusting the movement amount. Therefore, the position of the optical compensation element can be easily adjusted with a simple configuration, and the position of the optical compensation element can be finely adjusted even after the adjustment frame is fixed to the mounting member.

In the first aspect, the adjustment frame has a pair of the adjustment portions, and the pair of adjustment portions are substantially point-symmetrical with respect to the center of the optical compensation element when viewed from the attachment member side. Preferably, it is formed.
Here, when such an optical compensation element adjustment mechanism is used for a projector, among the liquid crystal panel for red light, the liquid crystal panel for green light and the liquid crystal panel for blue light, the liquid crystal panel for green light is another liquid crystal panel Since it is necessary to invert the light incident on the liquid crystal panel, it is necessary to make different the rotation axes for tilting the optical compensation element of the optical compensation element adjustment mechanism corresponding to the green light liquid crystal panel. Therefore, in the conventional optical compensation adjustment mechanism, it is necessary to respectively provide an optical compensation element adjustment mechanism corresponding to the liquid crystal panel for red light and blue light and an optical compensation element adjustment mechanism corresponding to the liquid crystal panel for green light .
On the other hand, according to the first aspect, since the pair of adjustment parts are formed substantially point-symmetrically with respect to the center of the optical compensation element, by rotating the adjustment frame by 180 °, the optical compensation element The pivot axis can be made different. Therefore, since the same adjustment frame can be used in the optical compensation element adjustment mechanism corresponding to each of all the liquid crystal panels, the manufacturing cost can be reduced.

In the first aspect, it is preferable that the second contact portion bias the moving member by a reaction force that the first contact portion receives from the attachment member.
According to the first aspect, when the second contact portion is moved according to the movement of the moving member, the second contact portion is moved in the direction opposite to the moving direction by the reaction force received from the mounting member by the first contact portion. Energize the contact part. Thus, the amount of inclination of the holding portion can be set to a value corresponding to the amount of movement of the moving member, and the inclined state of the holding portion can be maintained.

In the first aspect, it is preferable that the virtual line is a straight line that is inclined approximately 45 ° with respect to each side of the optical compensation element held by the holding unit.
Here, when the light modulation device is a liquid crystal panel of the VA (Vertical Alignment) method, the optical axis (slow axis) of the optical compensation element is with respect to each side (edge) of the substantially rectangular optical compensation element. It inclines approximately 45 degrees.
On the other hand, according to the first aspect, the imaginary line connecting the fixed parts is a straight line that inclines approximately 45 ° with respect to each side of the optical compensation element, thereby making the slow axis of the optical compensation element The optical compensation element can be rotated as a rotation axis. Therefore, the position of the optical compensation element can be properly and reliably adjusted with respect to the light modulation device.
When the virtual line is inclined at approximately 45 ° with respect to each side of the optical compensation element, the inclination angle of the virtual line is centered at 45 °, and the optical compensation element is included in an angle range that can be positioned with desired accuracy. Means to be

In the first aspect, the attachment member includes a plurality of engaging portions with which the pair of fixing portions are engaged, and the pair of fixing portions and the plurality of engaging portions are notches that engage with each other. It is preferable to have each.
According to the first aspect, when any of the plurality of engaging portions of the mounting member engages with the engaging portions of the pair of fixing portions, the holding portion is inclined with the engaging portion as a fulcrum. Thus, the optical compensation element can be pivoted about a pivoting axis centered on at least two fulcrums. Therefore, the position of the optical compensation element can be properly and reliably adjusted with respect to the light modulation device.

In the first aspect, at least one of the pair of fixing portions extends from the holding portion to a bending portion and from the tip of the bending portion substantially in parallel to the holding portion, and is fixed to the mounting member It is preferable to have a fixed main-body part.
According to the first aspect, at least one of the pair of fixing portions has a bending portion that bends from the holding portion, and a fixing main portion that extends from the distal end side of the bending portion, and the fixing portion is It fixes to an attachment member in the said fixing main-body part. According to this, the holding portion can be easily inclined by bending the bent portion. Therefore, the position adjustment of the optical compensation element can be performed more easily.

A projector according to a second aspect of the present invention includes a light source device, a light modulation device that modulates light emitted from the light source device, a projection optical device that projects light modulated by the light modulation device, and The optical compensation element adjustment mechanism according to one aspect of the present invention is characterized in that the optical compensation element adjustment mechanism is disposed between the light modulation device and the projection optical device.
According to the second aspect, the same effect as the optical compensation element adjustment mechanism according to the first aspect can be obtained. In addition, since the light modulation device can be optically compensated appropriately and reliably, the contrast of the projected image can be improved.

In the second aspect, the light modulation device includes a liquid crystal panel that modulates incident light, and a holding member that the liquid crystal panel holds on the light incident side, and the holding member is the mounting member. It is preferable that the pair of fixing portions be fixed to the light emitting side surface of the holding member.
According to the second aspect, the holding member for holding the liquid crystal panel on the light incident side is a mounting member to which the fixing portion of the adjustment frame is fixed. Therefore, by adjusting the position (tilt amount) of the optical compensation element with respect to the holding member, the tilt amount with respect to the light modulation device can be reliably adjusted.

In the second aspect, the adjustment frame includes a polarizing plate disposed between the light modulation device and the projection optical device, and a cooling device that sends a cooling air to a member to be a target of cooling of the projector. It is preferable to have the rectification | straightening part which distribute | circulates the cooling air ventilated from the said cooling device toward the said polarizing plate.
According to the second aspect, the adjustment frame includes the straightening unit that causes the cooling air to flow toward the polarizing plate. According to this, it is possible to direct the cooling air flowing toward the adjustment unit to the polarizing plate. Therefore, the polarizing plate can be cooled efficiently.

In the second aspect, the central axis of the light emitted from the light modulation device may transmit a position away from the center of the optical compensation element before the optical compensation element is tilted by the adjustment unit. preferable.

Here, the optical compensation element is rotated with the virtual line as a rotation axis, and is tilted with respect to the light modulation device. In this case, in the optical compensation element, one of the diagonals different from the diagonal according to the pair of fixing portions approaches the light modulation device, and the other is inclined in the direction away.
On the other hand, when the light emitted from the light modulation device spreads in the traveling direction of the light, the light passing through the corner portion side of the optical compensation device separated from the light modulation device is an optical compensation device close to the light modulation device. It spreads outside the light passing through the corner side.
Temporarily, while arranging the said optical compensation element so that the central axis of the light radiate | emitted from a light modulation apparatus and the center of an optical compensation element may correspond, all the light radiate | emitted from a light modulation apparatus is an optical compensation element. The optical compensation element is formed and arranged to be incident. In this case, when the optical compensation element is inclined, the area where light is not incident becomes large at the corner of the optical compensation element close to the light modulation device. That is, the optical compensation element becomes large.
On the other hand, according to the second aspect, the central axis of the light emitted from the light modulation device is offset from the center of the optical compensation element. Therefore, for example, when the optical compensation element is inclined, the region where light is not incident can be reduced by configuring so as to pass through the position on the side of the corner near the light modulation device. Therefore, since the optical compensation element and the holding portion can be miniaturized, the optical compensation element adjustment mechanism and hence the projector can be miniaturized.

FIG. 1 is a schematic view showing a configuration of a projector according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view showing the electro-optical device according to the first embodiment. FIG. 2 is a perspective view showing the optical compensation device according to the first embodiment. FIG. 2 is a perspective view showing the optical compensation device according to the first embodiment. FIG. 7 is a perspective view showing an adjustment frame of the optical compensation device according to the first embodiment. FIG. 7 is a plan view showing an adjustment frame of the optical compensation device according to the first embodiment. FIG. 7 is a schematic view showing a range in which the light flux from the liquid crystal panel passes through the optical compensation element when the center of the optical compensation element is positioned on the central axis of the light flux from the liquid crystal panel according to the first embodiment. FIG. 7 is a schematic view showing a range in which the light flux from the liquid crystal panel passes through the optical compensation element in the first embodiment. The figure explaining the flow of the cooling air in the said 1st Embodiment. FIG. 10 is a perspective view of an image forming unit constituting the electro-optical device according to the second embodiment as viewed from the light incident direction side. The perspective view which looked at the image formation part which concerns on the said 2nd Embodiment from the radiation | emission direction side of light. FIG. 7 is an exploded perspective view of an image forming unit according to the second embodiment. The perspective view which looked at the incident side polarizing plate which concerns on the said 2nd Embodiment, an optical compensation apparatus, and the 1st holding member from the radiation | emission direction side of light. The disassembled perspective view of the optical compensation apparatus which concerns on the said 2nd Embodiment. The perspective view which shows the adjustment frame which comprises the optical compensation apparatus which concerns on the said 2nd Embodiment. The side view which shows the adjustment frame which concerns on the said 2nd Embodiment. The perspective view of the attachment member which comprises the optical compensation apparatus which concerns on the said 2nd Embodiment. The perspective view which shows the state in which the adjustment frame and the screw were attached to the attachment member which concerns on the said 2nd Embodiment. The figure which shows the rotational axis at the time of the adjustment frame which concerns on the said 2nd Embodiment tilting. The perspective view of the optical compensation apparatus of the state which the adjustment frame which concerns on the said 2nd Embodiment inclined most. The figure which shows the rotational axis at the time of the adjustment frame which concerns on the said 2nd Embodiment tilting. Sectional drawing which shows the flow of the cooling air of the optical compensation apparatus which concerns on the said 2nd Embodiment.

First Embodiment
[Schematic configuration of the projector]
FIG. 1 is a schematic view showing a configuration of a projector 1 according to a first embodiment of the present invention.
The projector 1 according to the present embodiment modulates light emitted from the light source device 31 provided inside to form an image according to image information, and the image is displayed on a projection surface (not shown) such as a screen. It is an image display device which carries out expansion projection. As shown in FIG. 1, the projector 1 includes an exterior housing 2 having a substantially rectangular shape in plan view, which constitutes an exterior of the projector 1, and an optical unit 3 housed and arranged in the exterior housing 2. In addition, the projector 1 includes a control device (not shown) that controls the projector 1, a power supply device (not shown) that supplies power to the electronic components that configure the projector 1, and members that configure the projector 1. A cooling device CU that cools a member to be cooled is provided.

[Configuration of exterior housing]
The exterior housing 2 forms a top surface (not shown), a front 2B, a back 2C, a left side 2D, a right side 2E, and a bottom (not shown) of the projector 1, and the bottom is not shown. Multiple legs are provided. Then, by disposing the bottom surface facing downward in the vertical direction, the projector 1 is placed in the normal posture, and the bottom surface is placed upside down in the reverse of the normal posture. Thus, the projector 1 is in the reverse posture.

[Configuration of optical unit]
The optical unit 3 forms and projects an image according to the signal input from the control device described above. Such an optical unit 3 includes a light source device 31, an illumination optical device 32, a color separation device 33, a relay device 34, an electro-optical device 35, a projection optical device 36 and an optical component casing 37, which are illumination light axes It is arranged according to AX (optical axis in design).

The light source device 31 emits light to the illumination optical device 32. In the present embodiment, the light source device 31 includes a light source lamp 311 such as an extra-high pressure mercury lamp, a reflector 312, and a collimating lens 313. However, the invention is not limited to such a configuration, and instead of the light source lamp, a solid light source such as a light emitting diode (LED) or a laser diode (LD) may be adopted.

The illumination optical device 32 makes uniform the illuminance in the plane orthogonal to the central axis of the light flux emitted from the light source device 31. The illumination optical device 32 includes a pair of

multi lenses

321 and 322, a polarization conversion element 323, and a superimposing lens 324.
The color separation device 33 separates the light flux incident from the illumination optical device 32 into three color lights of red, green and blue. The color separation device 33 has

dichroic mirrors

331 and 332 and a reflection mirror 333.

The relay device 34 is provided on the optical path of red light longer than the optical paths of green light and blue light, and causes red light to be incident on the field lens 351 for red light while suppressing loss of light. The relay device 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344.

The electro-optical device 35 modulates each of the incident red, green and blue color lights for each color light, and then combines the respective color lights to form an image. The electro-optical device 35 includes three field lenses 351 provided for the respective color lights, three incident side polarizing plates 352, and three liquid crystal panels 353 as light modulators (for red light, green light and blue light The liquid crystal panels for the display are respectively 353R, 353G and 353B), three optical compensation devices 5, three emission side polarizing plates 354 and a cross dichroic prism 355 as a color combining device.

FIG. 2 is an exploded perspective view showing the configuration of the electro-optical device 35. As shown in FIG. In FIG. 2, the

liquid crystal panels

353 B and 353 R for blue light and red light, the optical compensation device 5, the output side polarizing plate 354, the first holding member 41 and the second holding member 42 are omitted.
Among the configurations of the electro-optical device 35, the liquid crystal panel 353, the optical compensation device 5, the output side polarizing plate 354 and the cross dichroic prism 355 are the first holding member 41 and the second holding member as shown in FIG. 42 are integrated.

Specifically, the liquid crystal panel 353 is attached to the light incident surface 41A of the first holding member 41, and the optical compensation device 5 is attached to the light emission surface 41B. Although not shown, an opening portion through which light that passes through the liquid crystal panel 353 and is incident to the optical compensation device 5 is formed substantially at the center of the first holding member 41.
The second holding member 42 is fixed to the corresponding light incident surface in the cross dichroic prism 355 via the output side polarization plate 354. At substantially the center of the second holding member 42, an opening 421 is formed to allow the light passing through the optical compensation device 5 to be incident on the output side polarizing plate 354. In addition, protrusions 422 protruding toward the light incident side are formed at the four corners of the second holding member 42, and these protrusions 422 are substantially rectangular holes formed at the four corners of the first holding member 41. It is inserted in 411. And after inserting the protrusion part 422 in these hole 411, the said structure is integrated by the 1st holding member 41 and the 2nd holding member 42 by inject | pouring and fixing an adhesive agent to the said hole 411. .

In such an electro-optical device 35, a liquid crystal panel of the VA system is adopted as the liquid crystal panel 353 in the present embodiment.
In addition, the optical compensation device 5 is disposed between the liquid crystal panel 353 and the output side polarizing plate 354. The optical compensation device 5 compensates for the phase difference generated between the ordinary light and the extraordinary light due to birefringence generated in the liquid crystal panel 353, and improves the visibility of the liquid crystal panel 353. The configuration of the optical compensation device 5 will be described in detail later.

Returning to FIG. 1, the projection optical device 36 enlarges and projects each color light (the image light) incident from the cross dichroic prism 355 onto the projection surface. As such a projection optical device 36, a combined lens provided with a lens barrel and a plurality of lenses disposed in the lens barrel can be exemplified.
The optical component casing 37 houses and arranges the devices 31 to 34 at predetermined positions with respect to the illumination optical axis AX set inside.

[Configuration of Optical Compensator]
3 and 4 are perspective views of the optical compensation device 5 as viewed from the light emission side. Among these, FIG. 3 is a perspective view of the optical compensation device 5 as viewed from the top surface side of the exterior housing 2, and FIG. 4 is a perspective view of the optical compensation device 5 as viewed from the bottom side of the exterior housing 2.
Each optical compensation device 5 is a device including the optical compensation element adjustment mechanism of the present invention, and optically compensates the corresponding liquid crystal panel 353 as described above. The optical compensation devices 5 are attached to the surface 41B on the light emission side of the first holding member 41 holding the corresponding liquid crystal panel 353, as shown in FIGS.
The optical compensation device 5 as described above holds the optical compensation element 51 and the optical compensation element 51, and also adjusts the inclination of the optical compensation element 51 with respect to the surface 41B (and the corresponding liquid crystal panel 353). And 52.

[Configuration of optical compensation element]
The optical compensation element 51 is an ordinary light due to birefringence generated in the liquid crystal panel 353 when the light flux is obliquely incident on the liquid crystal panel 353 (inclined with respect to the normal direction of the light incident surface of the liquid crystal panel 353). To compensate for the phase difference that occurs between The optical axis (slow axis) of the optical compensation element 51 is inclined at about 45 ° with respect to the respective edge of the substantially rectangular optical compensation element 51.
Such an optical compensation element 51 can be formed, for example, by forming a discotic (disk-like) compound layer on a transparent support such as triacetyl cellulose (TAC) via an alignment film, and a WV film (Fuji Film) Film company) can be adopted.

In the following description, the Z direction indicates the traveling direction of light traveling from the liquid crystal panel 353 to the cross dichroic prism 355 in each color light, and the X direction and the Y direction are orthogonal to the Z direction and orthogonal to each other. Indicates the direction. In the present embodiment, when the projector 1 is disposed in the normal posture and the Z direction is in the horizontal direction, the Y direction is the direction from the bottom to the top in the vertical direction, and the X direction is the Z When viewed along the direction, the direction is from left to right along the horizontal direction. Furthermore, the Z direction side refers to the downstream side (the tip side in the Z direction) in the Z direction, and the side opposite to the Z direction refers to the upstream side (the base side in the Z direction) in the Z direction. The other directions are also the same.

[Configuration of adjustment frame]
5 and 6 show the adjustment frame 52. As shown in FIG. Specifically, FIG. 5 is a perspective view of the adjustment frame 52 as viewed from the side opposite to the Z direction and the side opposite to the Y direction. FIG. 6 is a plan view of the adjustment frame 52 as viewed from the Z direction.
The adjustment frame 52 is attached to the first holding member 41, and the inclination of the optical compensation element 51 with respect to the liquid crystal panel 353 is adjusted by adjusting the angle with respect to the surface 41A while holding the optical compensation element 51. To adjust the As shown in FIGS. 3 to 6, the adjustment frame 52 includes a holding portion 521, a pair of fixing portions 522, an adjusting portion 523 and a flow straightening portion 524, and is formed by bending a sheet metal.

[Configuration of holding unit]
The holding portion 521 is a portion for holding the optical compensation element 51, and as shown in FIG. 6, has a substantially rectangular outer shape when viewed along the Z direction. The optical compensation element 51 is fixed to the surface (surface on the light incident side) opposite to the Z direction in the holding portion 521 by an adhesive or the like. Such a holding portion 521 has a rectangular opening 5211 substantially at the center, and light incident on the optical compensation element 51 through the corresponding liquid crystal panel 353 passes through the opening 5211 and is The light is incident on the exit side polarization plate 354.

[Configuration of fixed part]
As shown in FIGS. 3 to 6, each of the pair of fixing portions 522 is formed by bending a part of the holding portion 521, and is fixed to the surface 41B of the first holding member 41 by screws (not shown). It is a part which fixes adjustment frame 52 to the field 41B concerned.
The fixing portions 522 are corner portions on the Y direction side of the holding portion 521 among the corner portions CR1 to CR4 of the substantially rectangular holding portion 521, and a corner portion CR2 on the opposite side to the X direction, It is a diagonal of the corner CR2, and is located at the outermost edge of the farthest corner CR3, that is, in the vicinity of the corners CR2 and CR3. Such a fixing portion 522 has a bending portion 5221 and a fixing main portion 5222, respectively.

The bending portion 5221 is a portion opposite to the Z direction, that is, a portion that bends and extends from the holding portion 521 toward the first holding member 41, and positions on the same straight line in the respective fixing portions 522. Is a flat plate-like portion. Such a bent portion 5221 has flexibility and will be described later in detail, but when the holding portion 521 inclines, it becomes a rotation center of the holding portion 521.
The fixed main body portion 5222 is a portion formed by further bending the tip of the bending portion 5221, and is formed substantially parallel to the surface 41B. As shown in FIG. 5, the fixed body portions 5222 extend from the respective bent portions 5221 in opposite directions so as to be covered by the holding portions 521 in the respective fixing portions 522. A hole 5223 (see FIG. 5) is formed in each of the fixed main body 5222, and the adjustment frame 52 is fixed by fixing the screw S1 passing through the hole 5223 to the surface 41B. It is fixed to the first holding member 41.

[Configuration of Adjustment Unit]
The adjustment unit 523 inclines the optical compensation element 51 held by the holding unit 521 by tilting the holding unit 521 with respect to the surface 41 B to which the adjustment frame 52 is attached, and thus, the optical compensation to the liquid crystal panel 353 This is a part for adjusting the inclination of the element 51. The adjusting unit 523 is configured as a part of the holding unit 521, and in detail, in the holding unit 521, the vicinity of the corner CR1 different from the corners CR2 and CR3 at which the pair of fixing units 522 are located. It is located in
Such an adjustment unit 523 has a hole 5231 that penetrates the holding unit 521. Then, in accordance with the insertion amount of the screw S2 inserted into the surface 41B of the first holding member 41 through the hole 5231, the adjustment portion 523 is moved in the direction in which the adjusting portion 523 approaches the surface 41B. The portion 521 is inclined with respect to the surface 41 B, which in turn causes the optical compensation element 51 to be inclined.
That is, the amount of movement of the adjusting portion 523 in the direction approaching or separating from the surface 41B is adjusted according to the amount of insertion of the screw S2, so that the amount of inclination of the optical compensation element 51 is adjusted.

Here, as shown in FIG. 6, the fixing portion 522 is provided on an imaginary line R1 passing through the center CN1 of the rectangular opening 5211. More specifically, the bent portions 5221 are respectively located on the imaginary line R1. Such an imaginary line R 1 is a straight line inclined approximately 45 ° with respect to each edge of the substantially rectangular optical compensation element 51 held by the holding unit 521, and the virtual line R 1 of the optical compensation element 51 held by the holding unit 521 It is a straight line substantially parallel to the optical axis (slow axis). For this reason, as described above, when the holder 521 inclines in accordance with the insertion amount of the screw S2 inserted through the hole 5231 of the adjusting unit 523, the rotation axis of the holder 521 is the virtual line R1. It becomes a rotation axis shown by. Therefore, the optical compensation element 51 can be rotated about the slow axis.
The optical compensation element 51 is disposed so that the rubbing direction of the corresponding liquid crystal panel 353 and the slow axis overlap when viewed from the side opposite to the Z direction. For this reason, the optical compensation element 51 can be rotated (tilted) with the slow axis as a rotation axis, whereby the inclination adjustment of the optical compensation element 51 can be appropriately performed.

[Positional relationship between the central axis of light passing through the liquid crystal panel and the center of the optical compensation element]
Here, when viewed from the side opposite to the Z direction, at the stage before the optical compensation element 51 is tilted, as shown in FIG. 6, the center CN1 of the optical compensation element 51 is a liquid crystal panel at the opening 5211 It is offset with respect to the position of the central axis CN2 (the same as the illumination light axis AX) of the light emitted from 353. More specifically, the center CN1 is biased to the corner side opposite to the side on which the adjustment portion 523 is positioned along the imaginary line R2 orthogonal to the imaginary line R1 passing through the center CN1 with respect to the central axis CN2 ing.

FIG. 7 shows the range in which the light flux emitted from the liquid crystal panel 353 passes through the optical compensation element 51 when the center CN1 of the optical compensation element 51 is positioned on the central axis CN2 of the light flux emitted from the liquid crystal panel 353. It is a schematic diagram. Further, FIG. 8 shows that when the center CN1 of the optical compensation element 51 is shifted as described above with respect to the central axis CN2 of the light beam emitted from the liquid crystal panel 353, the light beam emitted from the liquid crystal panel 353 is optically compensated. FIG. 7 is a schematic view showing a range in which the element 51 is transmitted. 7 and 8 show the range as viewed along the virtual line R2, where the corner CR1 side is the upper side and the corner CR4 side is the lower side.
As shown in FIGS. 7 and 8, when the optical compensation element 51 is tilted with respect to the liquid crystal panel 353 by adjusting the insertion amount of the screw S2, the optical compensation is performed with respect to the center CN1 of the optical compensation element 51. The end on the corner CR1 side of the element 51 is on the opposite side to the Z direction, and the end on the corner CR4 side is on the Z direction.

Here, the light emitted from the liquid crystal panel 353 spreads in the Z direction. For this reason, the light passing through the end on the corner CR4 side away from the liquid crystal panel 353 spreads more outward than the light passing through the end on the corner CR1 side closer to the liquid crystal panel 353. Therefore, in a state where the center CN1 of the optical compensation element 51 is positioned on the central axis CN2, the optical compensation element 51 is arranged such that all the light beams emitted from the liquid crystal panel 353 are incident on the optical compensation element 51. When forming and arranging, as shown in FIG. 7, the area where light is not incident at the end of the optical compensation element 51 on the corner CR1 side becomes large. For this reason, when the center CN1 is located on the central axis CN2, it is difficult to miniaturize the optical compensation element 51.

On the other hand, in the present embodiment, when the central axis CN2 passes through the corner portion CR1 side with respect to the center CN1, the entire optical flux emitted from the liquid crystal panel 353 is incident on the optical compensation element 51. When the compensation element 51 is formed and disposed, as shown in FIG. 8, the area where light is not incident can be reduced at the end of the optical compensation element 51 on the corner CR1 side. Therefore, the optical compensation element 51 and the holder 521 can be miniaturized, and hence the optical compensation device 5 can be miniaturized.
In the above, the configuration in which the center CN1 and the central axis CN2 are deviated is illustrated, but the present invention is not limited to such a configuration, and another configuration may be adopted.

[Configuration of the rectifying unit]
As shown in FIGS. 4 to 6, the flow straightening unit 524 is extended from the holding unit 521 and bent at the tip end opposite to the Z direction, and the cooling air from the cooling device CU (see FIG. 1) , Rectifying toward the output side polarizing plate 354.
Specifically, the rectifying unit 524 extends from the end edge sandwiched by the corner portions CR3 and CR4 in the holding unit 521 to the opposite side to the Y direction, and the tip is further opposite to the Z direction (adjacent to the liquid crystal panel 353 (Direction away from the exit side polarizing plate 354).

FIG. 9 is a diagram showing the flow of the cooling air rectified by the rectification unit 524.
Such a rectifying unit 524 circulates the cooling air sent from the cooling device CU toward the emission side polarizing plate 354 as shown in FIG. That is, since the cooling air that has flowed toward the rectifying portion 524 flows along the end surface on the light emission side at the tip end portion of the rectifying portion 524, the flow direction of the cooling air is the direction toward the output side polarizing plate 354 It becomes. Then, the cooling air directed to the output side polarizing plate 354 flows in the Y direction along the output side polarizing plate 354. Thereby, the output side polarizing plate 354 is cooled.

[Effect of First Embodiment]
The projector 1 according to the first embodiment described above has the following effects.
In the present embodiment, the holding portion 521 holding the optical compensation element 51 is fixed to the liquid crystal panel 353 by two fixing portions 522. The holding portion 521 is rotated about the virtual line R1 by the adjusting portion 523 to adjust the amount of inclination of the holding portion 521 with respect to the first holding member 41 as an attachment member. According to this, the amount of tilt of the holding portion 521 holding the optical compensation element 51 is adjusted with respect to the first holding member 41 arranged at an appropriate position with respect to the liquid crystal panel 353, whereby the optical with respect to the liquid crystal panel 353 is The inclination amount of the compensation element 51 can be appropriately adjusted. In such a configuration, since the adjustment frame 52 can be configured as an integral product, the optical compensation device 5 can be configured as a simple configuration as compared to the configuration in which a plurality of members are combined. Therefore, the position of the optical compensation element 51 can be adjusted by the adjustment frame 52 having a simple configuration. In addition, since the liquid crystal panel 353 can be optically compensated appropriately and reliably, the contrast of the projected image can be improved.

Further, the holding portion 521 is firmly fixed to the first holding member 41 holding the liquid crystal panel 353 by the screw S1. Thereby, positional deviation of the holding portion 521 with respect to the liquid crystal panel 353 can be suppressed. Therefore, since the change in position of the imaginary line R1 which is the pivot axis of the holding portion 521 can be suppressed when adjusting the amount of inclination of the optical compensation element 51, the amount of inclination can be adjusted with high accuracy. Further, even after the adjustment of the amount of inclination, the change in the position of the imaginary line R1 can be suppressed, so that the inclination of the optical compensation element can be maintained.

The adjusting portion 523 is moved in the direction approaching the first holding member 41, whereby the holding portion 521 is inclined. In such a configuration, by moving the adjustment unit 523 in the direction in which the adjustment unit 523 is moved closer to the first holding member 41, the tilt amount of the holding unit 521 and hence the optical compensation element 51 can be easily adjusted. Therefore, the position adjustment of the optical compensation element 51 can be easily performed.

Further, in the optical compensation device 5, the amount of inclination of the holding portion 521 is adjusted in accordance with the amount of insertion of the screw S2 inserted into the hole 5231. In such a configuration, when the insertion amount is increased, the adjustment unit 523 is moved in the direction in which it approaches the first holding member 41 (liquid crystal panel 353), so the inclination amount of the optical compensation element 51 can be easily adjusted. In addition to the above, the position of the optical compensation element 51 can be finely adjusted by adjusting the insertion amount. Accordingly, the position of the optical compensation element 51 can be easily adjusted with a simple configuration, and the position of the optical compensation element 51 can be finely adjusted even after the adjustment frame 52 is fixed to the first holding member 41.
Further, by adjusting the screwing amount of the screw S2, the insertion amount can be adjusted with higher accuracy. Therefore, the amount of tilt of the optical compensation element 51 can be adjusted with higher accuracy.

Further, in the optical compensation device 5, the fixing portions 522 are provided in the two corner portions CR2 and CR3 in the diagonal relationship of the substantially rectangular holding portion 521, and the adjusting portion 523 is provided in the other corner portions CR1. ing. In such a configuration, the position of the adjustment unit 523 can be separated from the virtual line R1. Since the torque at the time of making the force which makes the holding part 521 turn with the said virtual line R1 be a rotational axis act on the adjustment part 523 by this can be enlarged, it can be made easy to turn the holding part 521. Therefore, the position adjustment of the optical compensation element 51 can be performed more easily.

The pair of fixing portions 522 includes a bending portion 5221 bent from the holding portion 521, and a fixing main body portion 5222 extending from the tip end side of the bending portion 5221. The fixing portion 522 is the fixing main body portion. It is fixed to the first holding member 41 by 5222. In such a configuration, according to this, when the bending portion 5221 is bent, the holding portion 521 can be easily inclined. Therefore, the position adjustment of the optical compensation element 51 can be performed more easily.
In addition, the bending portion 5221 is a plate-like member disposed along the imaginary line R1 in a plan view seen in the Z direction, and can suppress the bending portion 5221 from being twisted around the Z axis. Therefore, since inclination of virtual line R1 can be suppressed, position adjustment of optical compensation element 51 can be performed with high precision.

Further, since the bending portion 5221 is bent according to the insertion amount of the screw S2, the restoring force of the bending portion 5221 prevents the holding portion 521 and the optical compensation element 51 from being further inclined, and maintains these inclined states. it can. In other words, the holding portion 521 urges the screw S2 in the direction opposite to the insertion direction according to the amount of inclination, and the inclined state can be maintained. Therefore, fixing with an adhesive or the like is not necessarily required, and the time and effort of using the adhesive can be omitted when temporarily fixing at the time of assembly. In addition, because the fixing device is not fixed by an adhesive or the like, for example, the operation in the case of readjustment of the amount of inclination or in the case of removing the adjustment frame 52 can be facilitated.

In addition, an imaginary line R1 as a rotation axis of the holding portion 521 is a straight line having an angle of about 45 ° with respect to each side of the optical compensation element 51. Here, in the present embodiment, the slow axis of the optical compensation element 51 is inclined at about 45 ° with respect to each side (edge) of the substantially rectangular optical compensation element 51. Further, as described above, the rubbing direction of the VA type liquid crystal panel 353 is disposed so as to overlap with the slow axis. In this embodiment configured as described above, the imaginary line R1 is a straight line that inclines approximately 45 ° with respect to each side of the optical compensation element 51, so that the slow axis of the optical compensation element 51 is used as the rotation axis. The optical compensation element 51 can be rotated. Therefore, the position of the optical compensation element 51 can be appropriately and reliably adjusted with respect to the liquid crystal panel 353.

Further, when the holding portion 521 is inclined, the central axis CN2 of the light emitted from the light modulation device transmits a position away from the center CN1 of the optical compensation element 51. In the present embodiment, when the holding portion 521 is inclined, the adjustment frame 52 is attached to the first holding member 41 so that the central axis CN2 passes through the opening 5211 at a position closer to the liquid crystal panel 353 than the center CN1. It is fixed. In such a configuration, as described above, the area where the light from the liquid crystal panel 353 does not pass through the opening 5211 is smaller than in the case where the central axis CN2 and the center CN1 are arranged to coincide with each other. Since the optical compensation element 51 and the holding part 521 can be miniaturized, it is possible. Therefore, the optical compensation device 5 and hence the projector 1 can be miniaturized.

In addition, the adjustment frame 52 includes a rectifying unit 524 that circulates the cooling air toward the output side polarizing plate 354. According to this, the cooling air that has flowed toward the adjustment unit 523 can be directed to the emission side polarizing plate 354. Therefore, the exit side polarizing plate 354 can be cooled efficiently.

Second Embodiment
Next, a second embodiment of the present invention will be described.
The projector according to the present embodiment has a configuration similar to that of the projector 1 described above, except that the shapes of the first holding member and the second holding member that constitute the electro-optical device are different, and the configuration of the optical compensation device is different. This is different from the projector 1 described above. In the following description, parts that are the same as or substantially the same as the parts described above are given the same reference numerals and descriptions thereof will be omitted.

FIG. 10 is a perspective view of the image forming unit 6 constituting the electro-optical device of the projector according to the present embodiment as viewed from the light incident direction side. FIG. 11 is a perspective view of the image forming unit 6 as viewed from the light emission direction side, and FIG. 12 is an exploded perspective view of the image forming unit 6. 10 to 12, as in FIG. 2, the

liquid crystal panels

353B and 353G for blue light and red light, the optical compensation device 7, the output side polarization plate, the first holding member 61, and the second holding member 62. Illustration of is omitted.
The projector according to the present embodiment has the same configuration and function as the projector 1 except that the electro-optical device 35 is replaced with the electro-optical device 35A. Further, the electro-optical device 35A has the first holding member 61, the second holding member 62, and the optical compensation device 7 in place of the first holding member 41, the second holding member 42, and the optical compensation device 5, It has the same configuration and function as the optical device 35. That is, the electro-optical device 35A includes the incident side polarization plate 352, the liquid crystal panel 353, the emission side polarization plate 354 (see FIG. 22), the first holding member 61, the second holding member 62, and the optical compensation provided for each color light. A device 7 and a cross dichroic prism 355 are provided.

Among these, the first holding member 61 has substantially the same shape as the first holding member 41, and substantially rectangular holes 611 are formed at the four corners of the first holding member 61. The liquid crystal panel 353 is attached to the surface 61A on the light incident side of the first holding member 61, and the optical compensation device 7 is attached to the surface 61B on the light emission side. As shown in FIG. 12, an opening 612 through which light that passes through the liquid crystal panel 353 and is incident on the optical compensation device 7 is formed substantially at the center of the first holding member 61.
The second holding member 62 has substantially the same shape as the second holding member 42, and at the four corners of the second holding member 62, protrusions 622 that protrude to the light incident side are formed.
The second holding member 62 is fixed to the corresponding light incident surface in the cross dichroic prism 355. At substantially the center of the second holding member 62, an opening 621 is formed to allow the light passing through the optical compensation device 7 and the output side polarizing plate 354 to be incident on the cross dichroic prism 355. Further, the protrusions 622 of the second holding member 62 are inserted into substantially rectangular holes 611 formed at the four corners of the first holding member 61. And after inserting the projection part 622 in these hole parts 611, the said structure is integrated by the 1st holding member 61 and the 2nd holding member 62 by injecting and fixing an adhesive agent to the said hole part 611. .

[Configuration of Optical Compensator]
FIG. 13 is a perspective view of the optical compensation device 7 and the first holding member 61 as viewed from the light emission side, and FIG. 14 is an exploded perspective view of the optical compensation device 7 and the first holding member 61 of FIG.
The optical compensation device 7 provided for each color light is a device including the optical compensation element adjustment mechanism of the present invention, and optically compensates the corresponding liquid crystal panel 353 as described above. The optical compensation devices 7 hold the optical compensation element 51, the attachment member 71 attached to the first holding member 61, and the optical compensation element 51, as shown in FIGS. And an adjustment frame 72 for adjusting the tilt of the optical compensation element 51 with respect to the corresponding liquid crystal panel 353. Each optical compensation device 7 is attached to the surface 61 B on the light emission side of the first holding member 61 holding the corresponding liquid crystal panel 353.

[Configuration of adjustment frame]
FIG. 15 is a perspective view of the adjustment frame 72 as viewed from the Z direction, and FIG. 16 is a plan view of the adjustment frame 72 as viewed from the Y direction.
The adjustment frame 72 is attached to the attachment member 71. The inclination of the optical compensation element 51 held by the adjustment frame 72 with respect to the liquid crystal panel 353 is adjusted by adjusting the angle of the adjustment frame 72 with respect to the surface 71A.
Such an adjustment frame 72 includes a holding portion 721, a pair of fixing

portions

722, 723, a pair of adjusting

portions

724, 725, and rectifying

portions

726, 727, 728, 729, as shown in FIGS. It is formed by bending the sheet metal.

[Configuration of holding unit]
The holding portion 721 is a portion for holding the optical compensation element 51, and as shown in FIG. 15, has a substantially rectangular outer shape when viewed along the Z direction. The optical compensation element 51 is fixed to the surface (surface on the light incident side) opposite to the Z direction in the holding portion 721 with an adhesive or the like. Such a holding portion 721 has a rectangular opening 7211 substantially at the center, and light incident on the optical compensation element 51 through the corresponding liquid crystal panel 353 passes through the opening 7211 and is The light is incident on the exit side polarization plate 354.

[Configuration of fixed part]
The pair of fixing

portions

722 and 723 are disposed at substantially diagonal positions of the holding portion 721, as shown in FIGS. Specifically, the pair of fixing

portions

722 and 723 is an end portion on the X direction side of the edge portion on the Y direction side of the holding portion 721, and an X direction on the edge portion on the side opposite to the Y direction of the holding portion 721. Is formed at the opposite end.
Among these, a notch 7221 is formed at the edge on the Y direction side of the fixed portion 722, and a notch 7231 is formed at the edge on the side opposite to the Y direction of the fixed portion 723. These

notches

7221 and 7231 engage with any one of

notches

7121, 7131, 7141 and 7151 of protrusions 712 to 715 described later (see FIG. 17).
In addition, although mentioned later in detail, when the holding part 721 inclines, notch 7212, 7231 of fixing |

fixed part

722, 723 becomes a rotation center of the said holding part 721. As shown in FIG.

[Configuration of Adjustment Unit]
The pair of

adjustment units

724 and 725 are configured to adjust the optical compensation that is held by the holding unit 721 by tilting the holding unit 721 with respect to the surface 71B of the mounting member 71 to which the adjustment frame 72 is attached. This is a part for tilting the element 51 and, in turn, adjusting the tilt of the optical compensation element 51 with respect to the liquid crystal panel 353.
The pair of adjusting

portions

724 and 725 are formed to extend outward from the outer peripheral portion of the holding portion 721 (the adjusting frame 72), as shown in FIGS. Specifically, the adjustment portion 724 is formed on the side opposite to the X direction at the edge portion of the holding portion 721 on the Y direction side. Further, the adjustment portion 725 is formed on the X direction side of the edge on the side opposite to the Y direction of the holding portion 721.

Among the pair of

adjustment units

724 and 725, the adjustment unit 724 includes a first contact unit 7241 and a second contact unit 7242 as shown in FIG. 15 and FIG. The first contact portion 7251 and the second contact portion 7252 are provided. Among these, the

first contact portions

7241 and 7251 are portions that contact the surface 71B of the attachment member 71. The first contact portion 7241 is formed in a substantially U-shape and has flexibility. Specifically, the first contact portion 7241 protrudes in a substantially U shape in the direction opposite to the Z direction, and the first contact portion 7251 protrudes in a substantially U shape in the direction opposite to the Z direction. There is.
The

second contact portions

7242 and 7252 are portions that contact a screw S3 described later. The

second contact portions

7242 and 7252 are formed in a plate shape projecting from the end of the

first contact portions

7241 and 7251 in the opposite direction to the

first contact portions

7241 and 7251.
That is, the pair of

adjustment units

724 and 725 are formed in the same shape, and are formed substantially point-symmetrically with respect to the optical compensation element 51 (the center of the optical compensation element 51).

[Configuration of the rectifying unit]
The rectifying

portions

726, 727, 728, 729 extend from the holding portion 721 and are formed so that the tip end side is bent in the Z direction and the opposite direction to the Z direction, and the cooling air from the cooling device CU (see FIG. 1) The light is rectified so as to be directed to the output side polarizing plate 354 located on the light output side of the adjustment frame 72.
Among the rectifying units 726 to 729, the rectifying unit 726 is formed between the fixing unit 722 and the adjusting unit 724, and is inclined in the direction opposite to the Z direction. Further, the rectifying unit 727 is formed between the fixing unit 723 and the adjusting unit 725, and is inclined in the Z direction. That is, as shown in FIGS. 16 and 17, the rectifying unit 726 and the rectifying unit 727 are the optical compensation element 51 held by the adjustment frame 72 (more specifically, the center of the optical compensation element 51 and the center of the adjustment frame 72). ) Is formed substantially point-symmetrically.

Further, the rectifying portion 728 is formed on the side opposite to the X direction of the adjusting portion 724, that is, on the side opposite to the X direction at the edge portion on the Y direction side of the holding portion 721 and inclined to the Z direction side. There is. Similarly, the rectifying portion 729 is formed on the X direction side of the adjusting portion 725, that is, on the X direction side of the end portion on the side opposite to the Y direction of the holding portion 721, and opposite to the Z direction. It is inclined to That is, as shown in FIGS. 15 and 16, the rectifying unit 727 and the rectifying unit 728 are formed substantially point-symmetrically with respect to the optical compensation element 51 (the center of the optical compensation element 51).
Furthermore, the dimension in the X direction and the dimension along the Y direction of the rectifying

portions

726 and 727 are larger than the dimension in the X direction and the dimension along the Y direction of the rectifying

portions

728 and 729.
The rectification of the cooling air by

such rectification units

726, 727, 728, 729 will be described in detail later.
[Configuration of mounting member]
FIG. 17 is a perspective view of the mounting member 71 as viewed from the Z direction.
The attachment member 71 is attached to the surface 61B on the Z direction side of the first holding member 61, as shown in FIGS. 13 and 14, and has a function of holding the adjustment frame 72. The mounting member 71 includes a main body 711 and

protrusions

712, 713, 714, 715, 716, 717, 718 as shown in FIGS.
Among these, an opening 7111 having substantially the same shape as the opening 612 of the first holding member 61 is formed in a substantially central portion of the substantially rectangular main body 711. Since the adjustment frame 72 to which the optical compensation element 51 is attached is disposed inside the attachment member 71, light incident from the opening 612 is incident to the optical compensation element 51 through the opening 7111. .

The projecting portions 712 to 718 are plate-like portions that respectively project in the Z direction from the main body portion 711 as shown in FIG. 17, and are formed, for example, by bending a sheet metal.
Among these, the

protrusions

712 and 713 are formed at both ends of the main body 711 in the Y direction, and the

notches

7121 and 7131 are formed on the side of the

protrusions

712 and 713 opposite to the Y direction. ing. Further,

openings

7122 and 7132 are formed in substantially central portions of the protruding

portions

712 and 713, respectively. These

openings

7122 and 7132 are formed in such a size that a jig (for example, the tip of a driver) for rotating a screw S3 (see FIG. 14) described later can be inserted through the

openings

7122 and 7132. There is.

The

protrusions

714 and 715 are formed at both ends of the main body 711 opposite to the Y direction, and

notches

7141 and 7151 are formed on the Y direction side of the

protrusions

714 and 715. The

notches

7141 and 7151 and the

notches

7121 and 7131 engage with

notches

7221 and 7231 of fixing

portions

722 and 723 of the adjustment frame 72 described later.
The

protrusions

716 and 717 are formed on both sides of the substantially central portion of the main body 711.
The protrusions 712 to 715 correspond to a plurality of engaging portions of the present invention.

The protrusion 718 is formed between the

protrusions

712 and 713 in the main body 711 as shown in FIGS. 14 and 17. The projection 718 is formed with a hole 7181 in which the screw S3 is screwed, and the screw S3 is screwed into the hole 7181 to move the screw S3 in the direction along the X direction ( See Figure 18).

FIG. 18 is a perspective view showing a state in which the adjustment frame 72 and the screw S3 are attached to the mounting member 71, and FIG. 19 is a view showing a pivot axis R3 when the adjustment frame 72 inclines. The adjustment frame 72 in FIGS. 18 and 19 shows the arrangement of the adjustment frame 72 of the optical compensation device 7 corresponding to the liquid crystal panel 353R for red light and the liquid crystal panel 353B for blue light in the liquid crystal panel 353. .

[Attachment frame to mounting member]
As shown in FIG. 18, the adjustment frame 72 is fixed in a state where the surface 51A of the optical compensation element 51 faces in the Z direction. Specifically, the

notches

7221 and 7231 of the fixing

portions

722 and 723 of the adjustment frame 72 engage with the

notches

7121 and 7151 of the

protrusions

712 and 715 of the attachment member 71, respectively. On the other hand, the

notches

7221 and 7231 of any of the fixing

portions

722 and 723 of the adjustment frame 72 do not engage with the

notches

7131 and 7141 of the projecting

portions

713 and 714 of the attachment member 71. Thereby, as shown in FIG. 19, the adjustment frame 72 is supported at two points of the

notches

7121 and 7221 and the

notches

7151 and 7231, and is rotated about a rotation axis R3 having the two points as a fulcrum. It is fixed to the mounting member 71 so as to be movable.

[Inclination adjustment of optical compensation element]
FIG. 20 is a perspective view of the optical compensation device 7 in a state in which the adjustment frame 72 is maximally inclined as viewed from the Y direction.
The position adjustment (tilt adjustment) of the optical compensation element 51 with respect to the red light liquid crystal panel 353R will be described below, but the position adjustment of the optical compensation element 51 with respect to the blue light liquid crystal panel 353B is the same.
As shown in FIG. 20, a hole 7181 is formed in the projection 718 of the mounting member 71, and the screw S3 is screwed into the hole 7181. The screw S3 inserted from the X direction side into the hole 7181 is attached so as to be movable in a direction substantially parallel to the surface 71B of the attachment member 71, that is, along the X direction. Therefore, when the screw S3 is rotated and moved to the position shown in FIG. 18 and FIG. 20, the second contact portion 7242 of the adjustment portion 724 moves in the direction opposite to the X direction. As the second contact portion 7242 moves in the direction opposite to the X direction, the first contact portion 7241 bends in the direction opposite to the Z direction, and the Y direction side of the adjustment frame 72 and the X direction The end in the opposite direction is inclined in the Z direction. As a result, the adjustment frame 72 is inclined in the direction opposite to the Z direction about the rotation axis R3.
That is, the amount of movement of the adjustment portion 724 (the amount of deflection of the first contact portion 7241) in the direction approaching or separating from the surface 71B of the mounting member 71 is adjusted according to the amount of insertion of the screw S3. The inclination amount of the optical compensation element 51 is adjusted. The screw S3 corresponds to the moving member of the present invention.

FIG. 21 is a view showing the pivoting axis R4 when the adjustment frame 72 inclines. The adjustment frame 72 in FIG. 21 shows the arrangement of the adjustment frame 72 of the optical compensation device 7 corresponding to the liquid crystal panel 353G for green light in the liquid crystal panel 353.
Next, position adjustment of the optical compensation element 51 with respect to the green light liquid crystal panel 353G will be described.
The adjustment frame 72 of the optical compensation device 7 corresponding to the liquid crystal panel 353G for green light is attached to the attachment member 71 with the back surface 51B of the optical compensation element 51 facing in the Z direction, as shown in FIG. That is, the fixing portion 722 in the adjustment frame 72 corresponding to the liquid crystal panel 353R for red light and the liquid crystal panel 353B for blue light is attached in a rotated state by 180 degrees so as to be located in the opposite direction to the Y direction.
Specifically, the

notches

7221 and 7231 of the fixing

portions

722 and 723 of the adjustment frame 72 engage with the

notches

7131 and 7141 of the projecting

portions

713 and 714 of the attachment member 71, respectively. On the other hand, the

notches

7221 and 7231 of any of the fixing

portions

722 and 723 of the adjustment frame 72 do not engage with the

notches

7121 and 7151 of the

protrusions

712 and 715 of the attachment member 71. Thereby, as shown in FIG. 21, the adjustment frame 72 is supported at two points of the

notches

7131 and 7221 and the

notches

7141 and 7231, and is rotated about a rotation axis R4 having the two points as a fulcrum. It is fixed to the mounting member 71 so as to be movable.

Further, as shown in FIG. 21, a hole 7181 is formed in the projection 718 of the mounting member 71, and the screw S3 is screwed into the hole 7181. The screw S3 inserted into the hole 7181 from the side opposite to the X direction is attached so as to be movable in a direction substantially parallel to the surface 71B of the mounting member 71, that is, along the X direction. Therefore, when the screw S3 is rotated, the second contact portion 7252 of the adjustment unit 725 moves in the X direction. When the second contact portion 7252 moves in the X direction, the first contact portion 7251 bends in the direction opposite to the Z direction, and the end portion of the adjustment frame 72 in the Y direction and in the X direction Is inclined in the Z direction. As a result, the adjustment frame 72 is inclined in the direction opposite to the Z direction about the rotation axis R4.
That is, the amount of movement of the adjustment portion 724 (the amount of deflection of the first contact portion 7241) in the direction approaching or separating from the surface 71B of the mounting member 71 is adjusted according to the amount of insertion of the screw S3. The inclination amount of the optical compensation element 51 is adjusted.

[Rectification of cooling air by rectification section]
FIG. 22 is a diagram showing the flow of cooling air rectified by the rectification unit 729. The adjustment frame 72 in FIG. 22 shows the arrangement of the adjustment frame 72 of the optical compensation device 7 corresponding to the liquid crystal panel 353R for red light and the liquid crystal panel 353B for blue light in the liquid crystal panel 353.
The cooling air sent from the cooling device CU circulates along the Y direction with respect to each liquid crystal panel 353, the optical compensation device 7, and the output side polarizing plate 354. At this time, as shown in FIG. 22, the rectifying unit 729 circulates the cooling air toward the output side polarizing plate 354.
Specifically, a part of the cooling air circulates along the end face on the light emitting side at the tip end portion of the rectifying portion 729 and circulates in the direction toward the emission side polarizing plate 354. Then, the cooling air flows in the Y direction along the output side polarizing plate 354, whereby the output side polarizing plate 354 is cooled.
On the other hand, although not shown, the cooling air flowing toward the rectifying portion 727 circulates along the end surface on the light incident side in the tip portion of the rectifying portion 727 and circulates toward the liquid crystal panel 353. The cooling air flows along the liquid crystal panel 353 in the Y direction, whereby the liquid crystal panel 353 is cooled.
Although not shown, in the optical compensation device 7 corresponding to the green light liquid crystal panel 353G, the rectifying unit 726 functions in the same manner as the rectifying unit 727, and the rectifying unit 728 functions in the same manner as the rectifying unit 729. .

[Effect of Second Embodiment]
The projector according to the present embodiment described above exhibits the same effects as the above-described projector 1 and the following effects.
The

second contact portions

7242 and 7252 move according to the movement of the screw S3, and the

first contact portions

7241 and 7251 bend according to the movement of the

second contact portions

7242 and 7252. When 7242 and 7252 are moved by the screw S3 as much as possible, the holding portion 721 is maximally inclined. According to this, the position of the optical compensation element 51 can be adjusted by the adjustment frame 72 having a simple configuration. In addition, since the screw S3 moves substantially in parallel with the surface 71B of the mounting member 71 facing the optical compensation element 51, the screw S3 can be moved even when the screw S3 is covered by the output side polarizing plate 354. Therefore, even after the optical compensation device 7 is assembled, the positions of the holding portion 721 and the optical compensation element 51 held by the holding portion 721 can be adjusted.

Since the amount of inclination of the holding portion 721 is adjusted according to the amount of movement of the screw S3 relative to the

second contact portions

7242 and 7252, the amount of inclination of the optical compensation element 51 can be easily adjusted, and the amount of movement is adjusted. Thus, the position of the optical compensation element 51 can be finely adjusted. Accordingly, the position of the optical compensation element 51 can be easily adjusted with a simple configuration, and the position of the optical compensation element 51 can be finely adjusted even after the adjustment frame 72 is fixed to the attachment member 71.

Here, among the liquid crystal panel for red light, the liquid crystal panel for green light, and the liquid crystal panel for blue light, the liquid crystal panel for green light 353G is different from the other

liquid crystal panels

353R and 353B and is incident on the liquid crystal panel 353G. Since it is necessary to invert the light, it is necessary to make different rotational axes for inclining the optical compensation element 51 of the optical compensation device 7 corresponding to the liquid crystal panel for green light 353G. Therefore, in the conventional optical compensation device, it is necessary to provide an optical compensation device corresponding to the liquid crystal panel 353R for red light and the liquid crystal panel 353B for blue light and an optical compensation device corresponding to the liquid crystal panel 353G for green light. .
On the other hand, according to the present embodiment, since the pair of

adjustment units

724 and 725 are formed substantially point-symmetrically with respect to the center of the optical compensation element 51, the adjustment frame 72 is rotated by 180 °. The rotation axis of the optical compensation element 51 can be made different. Therefore, since the same adjustment frame 72 can be used in the optical compensation device corresponding to each of all the liquid crystal panels 353, the manufacturing cost can be reduced.

When the

second contact portions

7242 and 7252 are moved according to the movement of the screw S3, the

second contact portions

7241 and 7251 receive a second reaction in a direction opposite to the movement direction due to a reaction force received from the attachment member 71. The

contact portions

7242 and 7252 are biased. Thus, the amount of inclination of the holding portion 721 can be set to a value corresponding to the amount of movement of the screw S3, and the inclined state of the holding portion 721 can be maintained.

When one of the plurality of

notches

7121, 7131, 7141, 7151 of the mounting member 71 engages with the

notches

7221, 7231 of the pair of fixing

portions

722, 723, the holding portion 721 takes the engaging portion as a fulcrum. Is inclined. Thereby, the optical compensation element 51 can be rotated about the rotation axes R3 and R4 centering on at least two supporting points. Therefore, the position of the optical compensation element 51 can be appropriately and reliably adjusted with respect to the liquid crystal panel 353.

[Modification of the embodiment]
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like in the range in which the object of the present invention can be achieved are included in the present invention.
In the first embodiment, the adjusting unit 523 holds the optical compensation element 51 in the vicinity of the first holding member 41 as the attachment member by adjusting the screwing amount of the screw S2 as the insertion member. The inclination amount of the holding portion 521 is adjusted. Further, the adjusting unit 523 is located at a corner CR1 different from the corners CR2 and CR3 of the holding unit 521 at which the fixing unit 522 is located. However, the present invention is not limited to this. That is, as long as the tilt amount of the optical compensation element 51 is adjusted and the position of the optical compensation element 51 can be adjusted, the configuration and the position of the adjustment unit 523 do not matter.
For example, the insertion amount may be adjusted by inserting and removing the insertion member to adjust the inclination amount, and after adjustment, the insertion member may be fixed by a fixing member (for example, an adhesive or the like).
Alternatively, for example, a lever that protrudes in a direction away from the center CN1 may be provided as the adjustment unit in the holding unit 521, the lever may be operated to adjust the amount of inclination, and the holding unit 521 may be fixed after the adjustment.
Furthermore, according to the insertion amount of the screw S2 with respect to the first holding member 41, the adjusting portion 523 moves in the direction approaching the first holding member 41, and tilts the holding portion 521 and the optical compensation element 51. did. However, the present invention is not limited to this. For example, the adjustment unit may be moved in a direction away from the first holding member 41 to tilt the holding unit 521 and the optical compensation element 51.

In the first embodiment, the configuration in which the bending portion 5221 and the fixed main body portion 5222 are provided at each of the two corner portions CR2 and CR3 in a diagonal relationship has been exemplified. However, the present invention is not limited to this. For example, the bending portion 5221 and the fixing main body portion 5222 may be provided on only one of the pair of fixing portions 522. In addition, the fixing portion 522 may be configured to be fixed to the first holding member 41 by inserting the bending portion 5221 into the first holding member 41 as an attaching member without the fixing main body portion 5222. .
By providing the bending portion 5221 and the fixing main portion 5222 in each of the pair of fixing portions 522, the rotation of the virtual line R1 with respect to the Z axis can be more reliably suppressed, and the position adjustment of the optical compensation element 51 can be more appropriately. It can be implemented.

In the first embodiment, the fixing portions 522 are provided at the two corner portions CR2 and CR3 in a diagonal relationship, and the holding portion 521 is centered on the imaginary line R1 intersecting each side of the optical compensation element 51 at approximately 45 °. Is illustrated to adjust the tilt amount of the optical compensation element 51 by rotating the However, the present invention is not limited to this. That is, the angle of the imaginary line R1 with respect to each side of the optical compensation element 51 may be larger than 45 ° or smaller than 45 °.

In addition, along the virtual line orthogonal to the side of the optical compensation element 51, for example, the fixing portion 522 may be provided at the corner portions CR2 and CR4. In this case, for example, the adjustment unit 523 may be provided in the corner CR3, or may be provided between the corner CR1 and the corner CR3.
Moreover, the structure which provides two fixing parts 522 was illustrated. However, not limited to this, for example, a plurality of fixing portions 522 may be provided along one direction in the X direction or the Y direction. Alternatively, one fixing portion may be formed by bending the holding portion 521 along one direction in the X direction or the Y direction to provide a bent portion. Even in such a configuration, the holding portion 521 can be inclined along an imaginary line passing through the arrangement position of the fixing portion. In addition, since the holding portion 521 can be fixed by the fixing portion and positional deviation can be suppressed, the amount of inclination can be adjusted with higher accuracy.

In the above embodiments, the

optical compensation devices

5 and 7 as the optical compensation element adjustment mechanism are the light emission side of the

first holding members

41 and 61 that hold the liquid crystal panel 353 as the light modulation device on the light incident side. It is fixed to the face of However, the present invention is not limited to this. That is, the

optical compensation devices

5 and 7 may be attached to members different from the

first holding members

41 and 61 holding the liquid crystal panel 353.

In each of the above embodiments, the adjustment frames 52 and 72 are configured to include the rectifying

units

524 and 726 to 729 for circulating the air toward the output side polarizing plate 354 which is an optical component located at the rear stage of the optical path of the optical compensation element 51. there were. However, the present invention is not limited to this. For example, the rectifying

units

524 and 726 to 729 may not be provided integrally with the holding unit 521, and may be provided separately. Further, the object to be cooled to which the air whose flow direction is changed by the

flow straighteners

524 and 726 to 729 is blown is not limited to the output side polarizing plate 354 but may be another component such as the liquid crystal panel 353. Furthermore, the rectifying

units

524 and 726 to 729 may be omitted.

In the first embodiment, the center CN1 of the optical compensation element 51 before the adjustment of the position and the central axis CN2 of the light emitted from the liquid crystal panel 353 do not coincide with each other. However, the present invention is not limited to this. That is, they may match.

In the first embodiment, the holding portion 521 includes the pair of fixing portions 522. However, the present invention is not limited to this. For example, the holding portion 521 may be provided with a pair of fixing

portions

722 and 723 according to the second embodiment, instead of the pair of fixing portions 522. Even in this case, the same effect as that of the first embodiment can be obtained.
In the second embodiment, the adjustment frame 72 includes the pair of fixing

portions

722 and 723. However, the present invention is not limited to this. For example, the adjustment frame 72 may be provided with a pair of fixing portions 522 according to the first embodiment instead of the pair of fixing

portions

722 and 723. Even in this case, the same effects as those of the second embodiment can be obtained.

In the second embodiment, the screw S3 is moved in parallel with the surface 71B of the mounting member 71 (in the direction along the X direction). However, the present invention is not limited to this. For example, the screw S3 may be moved in a direction (direction along the Z direction) facing the surface 71B of the mounting member 71. In this case, the mounting member 71 may be provided with a protruding portion protruding to a position facing the

second contact portions

7242 and 7252 of the adjusting

portions

724 and 725 and a hole in which the screw S3 is screwed.

In the second embodiment, the adjusting frame 72 is provided with a pair of adjusting

portions

724 and 725 at the edge portion on the Y direction side of the holding portion 721 and the edge portion on the side opposite to the Y direction. However, the present invention is not limited to this. For example, only one of the

adjustment units

724 and 725 may be provided. That is, the adjustment frame 72 of the optical compensation device 7 corresponding to the liquid crystal panel 353R for red light and the liquid crystal panel 353B for blue light and the adjustment frame 72 of the optical compensation device 7 corresponding to the liquid crystal panel 353G for green light are provided. You may do so.

In the second embodiment, the mounting member 71 includes the protrusions 712 to 715, and the protrusions 712 to 715 are formed with the notches 7121 7131 7141, and 7151, respectively. However, the present invention is not limited to this. For example, only the

protrusions

712 and 715 may be provided, or only the

protrusions

713 and 714 may be provided. That is, the attachment member 71 of the optical compensation device 7 corresponding to the liquid crystal panel 353R for red light and the liquid crystal panel 353B for blue light and the attachment member 71 of the optical compensation device 7 corresponding to the liquid crystal panel 353G for green light are provided. You may do so.

In the above embodiments, the light source device 31 has the light source lamp 311. However, the present invention is not limited to this. That is, as described above, it may be configured to have a solid light source such as an LED or an LD, or the configuration is such that light emitted from the LD is made incident on the phosphor and light emitted from the phosphor is used. May be
Furthermore, the light source device is not limited to one, and a plurality of light source devices may be provided.

In each of the above embodiments, the projector 1 includes the three liquid crystal panels 353 as a light modulation device, but the present invention is not limited to this. That is, the present invention is applicable to a projector using two or less or four or more liquid crystal panels.
In each of the above embodiments, the arrangement position of each optical component in the optical unit 3 can be changed as appropriate. For example, a configuration having a substantially L shape in plan view or a configuration having a substantially U shape in plan is adopted. It is also good.
In each of the above embodiments, the transmissive liquid crystal panel 353 in which the luminous flux incident surface and the luminous flux emission surface are different is used, but a reflective liquid crystal panel in which the light incidence surface and the light emission surface are the same may be used.

In each of the above embodiments, the projector 1 including the liquid crystal panel 353 is exemplified as the light modulation device, but if it is a light modulation device capable of modulating the incident light flux according to image information, a device using a micro mirror, for example, a DMD A light modulation device using a light modulation device other than liquid crystal, such as one using (Digital Micromirror Device) or the like may be used. When such a light modulation device is used, an optical element having a function other than the viewing angle compensation function may be used as the optical compensation element. In addition, when such a light modulation device is used, the

polarizing plates

352 and 354 can be omitted.

DESCRIPTION OF SYMBOLS 1 ... Projector, 5,7 ... Optical compensation apparatus (optical compensation element adjustment mechanism) 41 ... 1st holding member (attachment member) 51 ...

Optical compensation element

52, 72 ... Adjustment frame, 71 ... Attachment member, 353 ... Liquid crystal panel (light modulation device), 354 ... Outgoing side polarization plate, 521, 721 ... Holding portion, 522, 722, 723 ... Fixed portion, 523, 724, 725 ... Adjustment portion, 524, 726, 727, 728, 729 ... Rectifying part, 712, 713, 714, 715 ... projecting part (a plurality of engaging parts), 5211, 7211 ... opening part, 5221 ... bending part, 5222 ... fixed main body part, 5231 ... hole part, 7121, 7131, 7141, 7151, 7221, 7231 ... notched, 7241, 7251 ... first contact portion, 7242, 7252 ... second contact portion, CN1 ... center, CN2 ... central axis, CR1, CR2, C R3: corner portion, CU: cooling device, R1: virtual line, S2: screw (insertion member), S3: screw (moving member).

Claims

An optical compensation element that optically compensates the light modulation device;
An adjustment frame for adjusting an angle of the optical compensation element with respect to the light modulation device;
The adjustment frame is
A substantially rectangular holding unit that holds the optical compensation element;
A pair of fixing portions respectively extending from the substantially diagonal positions of the holding portion in the direction crossing the holding portion and fixed to the mounting member to which the adjustment frame is attached;
An adjustment unit disposed at a position distant from the pair of fixing units, and inclining the optical compensation element by inclining the holding unit around an imaginary line connecting the pair of fixing units; Optical compensation element adjustment mechanism.
In the optical compensation element adjustment mechanism according to claim 1,
An optical compensatory element adjustment mechanism, wherein the adjustment unit inclines the holding unit by being moved in a direction approaching the attachment member.
In the optical compensation element adjustment mechanism according to claim 2,
The adjustment unit has a hole through which an insertion member inserted into the mounting member is inserted,
An optical compensation element adjustment mechanism, wherein an amount of inclination of the holding portion is adjusted by adjusting an amount of movement of the insertion member according to an amount of insertion of the insertion member into the attachment member.
In the optical compensation element adjustment mechanism according to claim 3,
An optical compensation element adjustment mechanism, wherein the holding portion biases the insertion member in a direction opposite to the insertion direction by being inclined by the adjustment portion.
The optical compensation element adjustment mechanism according to any one of claims 1 to 4.
The optical compensation element adjustment mechanism, wherein the adjustment unit is provided in the vicinity of a corner different from the arrangement position of the pair of fixing units in the holding unit.
In the optical compensation element adjustment mechanism according to claim 1,
The adjustment unit is formed to extend from the adjustment frame to the outer peripheral side,
The adjustment unit is
A first contact portion that contacts the mounting member;
And a second contact portion to which a moving member moving in parallel with a surface facing the optical compensation element in the mounting member is abutted.
The optical compensation element adjustment mechanism, wherein the first contact portion has flexibility.
In the optical compensation element adjustment mechanism according to claim 6,
An optical compensation element adjustment mechanism, wherein the amount of inclination of the holding portion is adjusted according to the amount of movement of the moving member in a state of being in contact with the second contact portion.
In the optical compensation element adjustment mechanism according to claim 6 or 7,
The adjustment frame has a pair of adjustment parts,
An optical compensation element adjustment mechanism, wherein the pair of adjustment parts are formed at positions substantially symmetrical with respect to the center of the optical compensation element when viewed from the mounting member side.
The optical compensatory element adjustment mechanism according to any one of claims 6 to 8.
An optical compensation element adjustment mechanism, wherein the second contact portion biases the moving member by a reaction force that the first contact portion receives from the attachment member.
The optical compensation element adjustment mechanism according to any one of claims 1 to 9.
The optical compensation element adjustment mechanism, wherein the virtual line is a straight line that inclines approximately 45 ° with respect to each side of the optical compensation element held by the holding unit.
In the optical compensation element adjustment mechanism according to any one of claims 6 to 9,
The mounting member includes a plurality of engaging portions with which the pair of fixing portions are engaged,
An optical compensation element adjustment mechanism, wherein the pair of fixing portions and the plurality of engaging portions have notches that engage with each other.
The optical compensation element adjustment mechanism according to any one of claims 1 to 11.
At least one of the pair of fixing parts is
A bent portion bent from the holding portion;
An optical compensatory element adjusting mechanism, comprising: a fixed main body portion extending substantially parallel to the holding portion from a tip end of the bending portion and fixed to the mounting member.
A light source device,
A light modulation device that modulates light emitted from the light source device;
A projection optical device for projecting the light modulated by the light modulation device;
An optical compensatory element adjustment mechanism according to any one of claims 1 to 12;
The projector according to claim 1, wherein the optical compensation element adjustment mechanism is disposed between the light modulation device and the projection optical device.
In the projector according to claim 13,
The light modulation device is
A liquid crystal panel that modulates incident light;
A holding member for holding the liquid crystal panel on the light incident side;
The holding member is the mounting member,
The projector according to claim 1, wherein the pair of fixing portions is fixed to a surface on the light emission side of the holding member.
In the projector according to claim 13 or 14,
A polarizing plate disposed between the light modulation device and the projection optical device;
A cooling device for sending a cooling air to a member to be cooled by the projector;
The projector according to claim 1, wherein the adjustment frame includes a straightening unit that causes cooling air blown from the cooling device to flow toward the polarizing plate.
The projector according to any one of claims 13 to 15.
A projector, wherein a central axis of light emitted from the light modulation device transmits a position away from the center of the optical compensation element before the optical compensation element is tilted by the adjustment unit.