JP6107043B2 - projector - Google Patents

Description

  The present invention relates to a projector.

  Conventionally, a light source device, a light modulation device that modulates light emitted from the light source device to form image light according to image information, and an enlarged projection of the formed image light on a projection surface such as a screen There is known a projector equipped with a projection optical device. In addition to these, such a projector has a plurality of optical components arranged on the optical path of light incident on the light modulation device from the light source device. As such an optical component, a projector including a polarizing plate and an optical compensation plate provided on a light beam incident side of a liquid crystal panel as a light modulation device is known (for example, see Patent Document 1).

  In the projector described in Patent Document 1, a polarizing plate (incident side polarizing plate) is held by a polarizing plate frame, and an optical compensator is held by a compensating plate frame, and is held by these polarizing plate frames. Among these, the polarizing plate frame is attached to a support base provided in the casing, and the compensation plate frame is attached to the polarizing plate frame.

  By the way, these polarizing plates and optical compensators need to be adjusted in position such as a rotation angle in order to adjust the contrast between white and black, and the projector is provided with an adjusting mechanism for adjusting the position. It has been. In the projector, the polarizing plate frame is rotated together with the compensating plate frame, and the position of the polarizing plate is adjusted, and then the compensating plate frame is rotated to adjust the position of the optical compensating plate.

JP 2007-298893 A

However, in the projector described in Patent Document 1, when adjusting the position of the polarizing plate and the optical compensator, it is necessary to adjust the position of the optical compensator after adjusting the position of the polarizing plate. For this reason, even if it is necessary to adjust the position of only the polarizing plate, the compensator frame also rotates in accordance with the rotation of the polarizing plate frame. Therefore, it is necessary to further adjust the position of the compensator frame. The position adjustment operation becomes complicated.
For this reason, a mechanism capable of independently adjusting the position of each has been desired.

  An object of the present invention is to provide a projector that can easily adjust the position of an optical component.

  A projector according to one embodiment 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 the modulated light, and light emitted from the light source device. A first optical component and a second optical component disposed on the optical path, a first holding member that holds the first optical component, a second holding member that holds the second optical component, and the first holding And a mounting member to which the second holding member is mounted. The mounting member is provided on a side opposite to the first mounting portion, and a first mounting portion to which the first holding member is rotatably mounted. And a second attachment portion that is rotatably attached to the second holding member independently of the first holding member.

In addition, as a 1st optical component and a 2nd optical component, a polarizing plate, an optical compensation board, and a phase difference plate can be illustrated.
According to the above aspect, the first holding member is rotatably attached to the first attachment portion of the attachment member, and the first attachment portion is located on the opposite side of the attachment member from the first attachment portion. The second holding member is rotatably attached independently of the holding member. According to this, the 1st holding member holding a 1st optical component and the 2nd holding member holding a 2nd optical component can be attached to an attachment member so that position adjustment is possible respectively independently. Therefore, the position adjustment of the first optical component and the second optical component can be easily performed as compared with the case where the other moves when adjusting the position of one of the first optical component and the second optical component.

  In the above aspect, the optical component includes: another optical component disposed on the optical path; and an optical component housing in which the other optical component is housed. The mounting member includes the first mounting portion and the first mounting portion. A main body portion having the second mounting portion; and an extending portion extending from an end portion of the main body portion to a side where the first mounting portion is located with respect to the second mounting portion. It is preferable that a fixing portion for fixing the attachment member to the optical component casing is provided at the protruding portion.

  According to the above aspect, the extension portion of the attachment member is provided with the fixing portion that fixes the attachment member to the outer surface of the optical component casing. According to this, by fixing the mounting member to the optical component casing in which other optical components are accommodated, the positions of the first optical component and the second optical component can be adjusted later on the optical component casing. Can be attached. Accordingly, the manufacturing process of the projector can be simplified as compared with the case where the mounting member is provided in the optical component casing.

Here, when the mounting member is provided inside the optical component housing, when replacing at least one of the first optical component and the second optical component, disassemble the optical component housing, It is necessary to remove each holding member after taking out the mounting member. In such a case, the replacement work of the optical component is complicated.
On the other hand, according to the above aspect, the mounting member attached to the outer surface of the optical component housing is replaced with another mounting member, or the mounting member is removed and the corresponding holding member is removed. By exchanging and reattaching the attachment member to the optical component casing, at least one of the first optical component and the second optical component can be exchanged. Therefore, the replacement work of the first optical component and the second optical component can be easily performed.

  In the one aspect, the first holding member has a first operation part that extends along the extension part and rotates the first holding member, and the second holding member has the extension part. And a second operation part that rotates the second holding member, and the first operation part is connected to the second operation part via an opening formed in the extension part. It is preferable to have the protrusion part exposed to the located side.

  According to the above aspect, the first operation portion and the protrusion provided in the second operation portion are located on the same side in the extension portion of the attachment member. According to this, rotation operation of a 1st holding member and a 2nd holding member can be implemented on the same side with respect to an extension part, respectively. Therefore, the position adjusting operation of the first holding member and the second holding member can be easily performed.

  In the above aspect, the attachment members stand upright from positions in the first attachment portions corresponding to ends located on both sides in the width direction perpendicular to the rotation central axis of the first holding member. A restricting portion, and a second restricting portion that stands up from a position in the second mounting portion corresponding to ends located on both sides in the width direction orthogonal to the central axis of rotation of the second holding member. It is preferable.

  According to the one aspect, the first restricting portion and the second restricting portion are provided in the portion of the attachment member. According to this, the first holding member and the second holding member are not rotated by the first restricting portion and the second restricting portion, but are translated along the first attaching portion and the second attaching portion. Can be regulated. Therefore, the first holding member and the second holding member can be easily rotated, and the position adjusting operation of the first optical component and the second optical component can be easily performed.

  In the above aspect, one of the first restricting portion and the end portion of the first holding member facing the first restricting portion has a convex curved surface, the other has a flat surface, and the second restricting portion. Of the end portions of the second holding member facing the second restricting portion, it is preferable that one has a convex curved surface and the other has a flat surface.

In addition, the convex curved surface can illustrate the circular arc which the center part expanded, for example.
Here, when each of the first restricting portion and the portion of the first holding member has a flat surface, the first restricting portion and the first holding member are brought into contact with each other as the first holding member rotates. Then, the rotation of the first holding member is restricted. This is the same when the second restricting portion and the portion of the second holding member each have a flat surface.
On the other hand, when each of the first restricting portion and the portion of the first holding member has a convex curved surface, when the first holding member is rotated, the first restricting portion and the portion of the first holding member are It slips and it becomes difficult to rotate the 1st holding member stably. The same applies to the case where the second restricting portion and the portion of the second holding member each have a convex curved surface.
On the other hand, when one of the first restricting portion and the portion of the first holding member has a convex curved surface and the other has a concave curved surface, the first holding member is prevented while preventing the parallel movement of the first holding member. It is possible to facilitate the rotation of the member. However, in this case, the formation of the first restricting portion and the first holding member becomes complicated. The same applies to the case where one of the second restricting portion and the portion of the second holding member has a convex curved surface and the other has a concave curved surface.

On the other hand, when one of the first restricting portion and the portion of the first holding member has a convex curved surface and the other has a flat surface, when they are in contact with each other, a plane is formed along the convex curved surface portion. Since the portion moves smoothly, the first holding member can be easily rotated. Moreover, formation of such a 1st control part and a 1st holding member is easy compared with the case where one has a convex curved surface and the other has a concave curved surface. Therefore, it is possible to facilitate the rotation of the first holding member while preventing the aforementioned parallel movement of the first holding member.
The same effect can be obtained with respect to the second holding member also by having one of the second restricting portion and the above-mentioned portion of the second holding member having a convex curved surface and the other having a flat surface.

  In the above aspect, the first holding member is provided at a flat plate-like holding portion to which the first optical component is attached and at both ends of the holding portion in the width direction, and bends toward the attachment member. A bent portion, and the first restricting portion has a convex surface on a surface facing the bent portion, and the bent portion on a surface facing the first restricting portion, It is preferable to have the plane.

Here, when the first holding member is formed by bending a sheet metal, the surface facing the first regulating portion in the bent portion formed by the bending process is a convex curved surface. difficult. Further, when the surface is a convex curved surface, the accuracy of the convex curved surface is not high.
On the other hand, the precision of a convex curved surface can be improved by making the surface which opposes a bending part in a 1st control part into a convex curved surface. Moreover, by making the surface which faces a 1st control part in a bending part into a plane, it can make it easy to implement rotation of a 1st holding member as mentioned above. Therefore, the first holding member can be stably rotated.

  In addition, since the first holding member has a bent portion, a flow path through which air for cooling the first optical component flows is formed in the space surrounded by the first mounting portion, each bent portion, and the holding portion. it can. According to this, air can be effectively blown to the first optical component by circulating air through the flow path. Therefore, the first optical component can be effectively cooled.

In the above aspect, the attachment member may include an air guide portion that guides air flowing along the attachment member to a cooling target disposed on at least one of a light flux incident side and a light flux emission side of the attachment member. preferable.
According to the said one aspect | mode, since the air which distribute | circulates along an attachment member can be guide | induced to the object to be cooled by an air guide part, the cooling efficiency of the said object to be cooled can be improved.

  In the above aspect, the light modulation device is disposed on a light beam emission side of the second optical component, and the light modulation device includes a device main body that modulates incident light, and a frame that houses the device main body therein. The cooling target is the light modulation device, and the frame is formed at an upstream end in a direction in which the air flows, and is separated from the mounting member toward the upstream. It is preferable that an inclined portion that inclines in a direction is provided, and the air guide portion is located upstream of the inclined portion in the air flow direction and guides air toward the inclined portion.

An example of the light modulation device is a liquid crystal panel. In this case, the device main body is a panel main body in which a liquid crystal element is sealed between a pair of translucent substrates.
Here, since the light modulation device is configured to modulate the light incident from the light source device, the light modulation device is likely to become high temperature, but is weak to heat. For this reason, it is necessary to cool the light modulation device, and generally, the light modulation device is cooled by blowing cooling air.

  However, when the air sent from the fan via the duct is blown to the light modulation device, the air does not properly flow through the light modulation device unless the blowing direction is set appropriately. Moreover, when the distance from the outlet of the duct to the light modulation device becomes long, air may not be appropriately sent to the light modulation device even when the air blowing direction is appropriately set. Furthermore, the air sent to the end of the light modulation device is divided at the end. There is a problem in that these airs are separated from the light modulation device toward the downstream side, and the entire light modulation device is not cooled.

On the other hand, according to the one aspect, air can be guided to the light modulation device by the wind guide portion at a position relatively close to the light modulation device. According to this, air can be effectively applied to the light modulation device, and air circulated toward the mounting member can also be guided to the light modulation device, so that the amount of air blown can be increased. Therefore, the cooling efficiency of the light modulation device can be improved.
In particular, the air guided by the air guide part flows toward the inclined part formed in the frame. According to this, the air is caused to collide with a part of the air flowing through the second optical component among the air divided at the upstream end of the air in the frame, and the part of the air In addition, the guided air can be circulated along the surface of the light modulator on the light beam incident side. Therefore, the light modulation device can be cooled more effectively.

FIG. 2 is a schematic diagram illustrating a configuration of a projector according to an embodiment of the invention. The perspective view which shows the liquid crystal panel in the said embodiment. The perspective view which shows the housing | casing for optical components in the said embodiment. The perspective view which looked at the fixing member in the said embodiment from the light beam entrance side. The disassembled perspective view which looked at the fixing member in the said embodiment from the light beam entrance side. The perspective view which looked at the fixing member in the said embodiment from the light beam emission side. The disassembled perspective view which looked at the fixing member in the said embodiment from the light beam emission side. The figure which looked at the fixing member in the said embodiment from the light beam entrance side. The figure which looked at the fixing member in the said embodiment from the light beam emission side. The figure which shows the flow of the air ventilated to the fixing member and light modulation apparatus in the said embodiment.

FIG. 1 is a schematic diagram illustrating a configuration of a projector 1 according to the present embodiment.
The projector 1 according to the present embodiment modulates light emitted from a light source device 31 described later according to image information and enlarges and projects the modulated light onto a projection surface such as a screen. Display an image on the screen. As shown in FIG. 1, such a projector 1 includes an exterior housing 2, an optical unit 3 and a cooling device 9 (see FIG. 8) housed in the exterior housing 2. In addition, although not shown, the projector 1 includes a control device that controls the projector 1 and a power supply device that supplies power to the electronic components that constitute the projector 1.

[Configuration of optical unit]
The optical unit 3 forms and projects an image according to a drive signal (image information) input from the control device. The optical unit 3 includes an optical component housing 4, a light source device 31 supported by the optical component housing 4, various optical devices 32 to 35, and a projection lens 36.

The light source device 31 includes a light source lamp 311 and a reflector 312, a housing 313 that houses the light source lamp 311 and the reflector 312, a collimating lens 314 that closes a light transmitting opening formed in the housing 313, and Have Such a light source device 31 emits a light beam to the illumination optical device 32.
The illumination optical device 32 equalizes the illuminance in a plane orthogonal to the central axis of the light beam emitted from the light source device 31. The illumination optical device 32 includes a pair of lens arrays 321 and 322 that divide an incident light beam into a plurality of partial light beams, a polarization conversion element 323 that aligns the polarization direction of incident light into one type, and a plurality of incident light beams. And a lens array 322 and a superimposing lens 324 that superimposes the partial light beam on an image forming area of a liquid crystal panel 354 described later.

The color separation optical device 33 separates the light beam incident from the illumination optical device 32 into three color lights of red (R), green (G), and blue (B). The color separation optical device 33 includes a dichroic mirror 331 that transmits red light and green light and reflects blue light, a dichroic mirror 332 that transmits red light and reflects green light, and blue light reflected from the dichroic mirror 331. And a reflection mirror 333 that leads to the light field lens 351.
The relay optical device 34 is provided on the optical path of red light among the three separated color lights, and guides the red light to the field lens 351 for red light. The relay optical device 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344. The relay optical device 34 suppresses the loss of the red light because the optical path of the separated red light (the optical path to reach the liquid crystal panel 354) is longer than the optical paths of the other color lights.

The electro-optical device 35 modulates the separated color lights, and then combines the modulated color lights to form image light. The electro-optical device 35 includes three field lenses 351, three incident-side polarizing plates 352, three optical compensation plates 353, three liquid crystal panels 354 as light modulators, and three light-emitting devices provided for each color light. It has a side polarizing plate 355 and a cross dichroic prism 356 as a color synthesizing optical device that synthesizes each modulated color light.
Among these, the three liquid crystal panels 354, the three output side polarizing plates 355, and the prism 356 are unitized. Further, the incident side polarizing plate 352 and the optical compensation plate 353 are attached to the fixing member 5 for each incident color light. That is, the optical unit 3 is provided with three fixing members 5. The detailed configuration of the fixing member 5 will be described later in detail.

FIG. 2 is a perspective view of the liquid crystal panel 354 as viewed from the light incident side.
As shown in FIG. 2, the liquid crystal panel 354 includes a panel main body 3541 in which a liquid crystal element is sealed between a pair of translucent substrates, a frame 3542 for housing the panel main body 3541 therein, the panel main body 3541 and the aforementioned control. And a flexible printed circuit board 3549 for connecting the apparatuses. The panel body 3541 corresponds to the apparatus body in the present embodiment.

The frame 3542 is formed of a metal having thermal conductivity. The frame 3542 is formed with a substantially rectangular opening 3543 (the opening on the light beam exit side is not shown) on the end surfaces on the light beam incident side and the light beam output side. The light transmitted through the opening 3543 on the light beam incident side is incident on the image forming area AR of the panel main body 3541, and the light transmitted through the panel main body 3541 passes through the opening on the light beam output side, and then exits from the output side polarizing plate. 355 is incident.
Holes 3544 through which screws for fixing the frame 3542 are inserted into support members (not shown) that support the liquid crystal panel 354 when the electro-optical device 35 is unitized when viewed from the light beam incident side. Is formed.

  In addition, an inclined portion 3545 is formed at the end of the frame 3542 opposite to the side on which the flexible printed board 3549 extends. Specifically, the inclined portion 3545 is inclined so as to approach the optical compensation plate 353 located on the light beam incident side as it goes toward the opening 3543 (panel body 3541). In other words, the inclined portion 3545 is formed so that the thickness dimension (dimension along the illumination optical axis) of the inclined portion 3545 becomes smaller toward the opposite end portion. Air is guided to the inclined portion 3545 by an air guide portion 535 (see FIG. 8) of the mounting member 53 described later.

  Returning to FIG. 1, the projection lens 36 is a projection optical device that enlarges and projects the light beam (image light) synthesized by the prism 356 onto the projection surface. As such a projection lens 36, for example, a combined lens including a lens barrel and a plurality of lenses housed and arranged in the lens barrel can be cited.

[Configuration of optical component casing]
FIG. 3 is a perspective view showing the optical component casing 4.
The optical component housing 4 is made of a synthetic resin or metal that holds the light source device 31, the illumination optical device 32, the color separation optical device 33, and the relay optical device 34 at a predetermined position with respect to the illumination optical axis Ax set therein. It is a case made of. As shown in FIG. 3, the optical component casing 4 includes a light source device 31 and a component storage member 41 that stores the optical devices 32 to 34, and a lid-like member 42 that is attached to the component storage member 41. . That is, each optical component constituting the optical devices 32 to 34 corresponds to another optical component of the present invention.

The component storage member 41 includes a main body portion 411, a light source storage portion 412 formed at one end of the main body portion 411, and a lens support portion 413 formed at the other end of the main body portion 411. It is formed in a letter shape.
On the other end side of the main body 411, a rectangular space S in plan view in which the electro-optical device 35 is disposed is formed. Although not shown, the main body 411 is formed with a plurality of grooves into which the optical components constituting the optical devices 32 to 34 and the field lens 351 are inserted, and the optical components are inserted into the grooves. An opening 4111 for this purpose is formed on the upper end surface.

The light source storage 412 is formed in a box shape. An opening 4121 for housing the housing 313 is formed on the surface of the light source housing 412 opposite to the main body 411. Further, openings 4122 and 4123 for introducing and discharging cooling air to and from the light source device 31 housed therein are formed on the left and right side surfaces of the light source housing portion 412.
The central axis of the light beam emitted from the light source device 31 stored in the light source storage unit 412 matches the above-described illumination optical axis Ax.
The lens support portion 413 has a partial configuration surrounding the space S described above, and supports the projection lens 36 fixed to a lens fixing member (not shown) fixed in the exterior housing 2.

The lid-like member 42 is screwed to the main body 411 and closes a part of the opening 4111 described above. At the position in the vicinity of the outer edge of the space S in the lid-like member 42, three attachment portions 421 to which a fixing member 5 described later is attached are provided.
These attachment portions 421 include screw holes (not shown) to which the screws SC inserted through the fixing member 5 are attached, and a pair of pins 422 arranged so as to sandwich the screw holes and positioning the fixing member 5. .

[Configuration of fixing member]
4 and 5 are a perspective view and an exploded perspective view of the fixing member 5 as seen from the light beam incident side. 6 and 7 are a perspective view and an exploded perspective view of the fixing member 5 as seen from the light beam emission side.
The fixing member 5 holds the incident-side polarizing plate 352 as the first optical component and the optical compensation plate 353 as the second optical component so as to be rotatable about the illumination optical axis Ax, and the lid-like shape described above. It is fixed to the member 42. As shown in FIGS. 4 to 7, the fixing member 5 includes a polarizing plate holding member 51 that holds the incident-side polarizing plate 352, a compensation plate holding member 52 that holds the optical compensation plate 353, and an attachment member 53. And two clamping members 54.
In the following description, the traveling direction of light with respect to the fixing member 5 is the Z direction. Of the directions orthogonal to the Z direction, the direction from the bottom to the top is defined as the Y direction, and the direction from the left to the right as viewed from the base end side in the Z direction is defined as the X direction.

[Configuration of polarizing plate holding member]
The polarizing plate holding member 51 is a metal member having a substantially L-shape in side view formed by bending a sheet metal, and is attached to the first attachment portion 532 located on the base end side in the Z direction in the attachment member 53. . As shown in FIGS. 4 to 7, the polarizing plate holding member 51 includes a holding portion 511 that holds the incident-side polarizing plate 352 along the XY plane, and a Y-direction proximal end from the Y-direction distal end of the holding portion 511. And an operation unit 512 extending toward the side.

FIG. 8 is a view of the fixing member 5 as viewed from the light beam incident side (Z-direction base end side), and mainly shows the polarizing plate holding member 51.
As shown in FIG. 8, the holding portion 511 is formed in a rectangular shape whose longitudinal direction is the Y direction when viewed from the base end side in the Z direction. A rectangular opening 5111 that allows light to pass through the held incident-side polarizing plate 352 is formed at substantially the center of the holding unit 511. A plurality of locking portions 5112 that lock the incident-side polarizing plate 352 are provided at the edge that forms the opening 5111. Specifically, among the edges, one locking portion 5112 is provided substantially at the center of the edge on the Y direction front end side (+ Y direction side), and the Y direction base end side (−Y direction side) edge. Locking portions 5112 are provided in the vicinity of both ends in the X direction. By these locking portions 5112, the incident-side polarizing plate 352 disposed on the light beam exit side in the holding portion 511 is locked inward.

As shown in FIGS. 4 and 5, bent portions 5113 that are bent toward the tip end side in the Z direction (+ Z direction side) are formed at both ends in the X direction of the holding portion 511. The dimensions of the bent portion 5113 in the Y direction and the Z direction are set so as to cover the locked incident-side polarizing plate 352.
In addition, a protruding portion 5114 that protrudes further to the front end side in the Z direction is formed at the approximate center in the Y direction of each bent portion 5113. The formation positions of these protrusions 5114 are along the X direction when the polarizing plate holding member 51 is viewed from the base end side in the Z direction (the −Z direction side), and the central point of rotation of the polarizing plate holding member 51 (Center axis) A position on a straight line passing through C1. These projecting portions 5114 face a first restricting portion 5325 (described later) of the attachment member 53, thereby preventing the parallel movement of the polarizing plate holding member 51 in the X direction.

  As shown in FIGS. 4, 5, and 8, arc-shaped guide holes 5115 that pass through the holding portion 511 are formed in line symmetry in the vicinity of both ends in the X direction on the tip end side in the Y direction of the holding portion 511. Has been. When the polarizing plate holding member 51 is attached to the attachment member 53, the pins 5323 of the attachment member 53 are inserted into the guide holes 5115, thereby guiding the rotation of the polarizing plate holding member 51.

The operation unit 512 corresponds to the first operation unit of the present invention. The operation portion 512 is located on the Y direction base end side with respect to an extension portion 536 (to be described later) of the mounting member 53, and extends along the extension portion 536 from the Y direction distal end side end portion of the holding portion 511 to the Z direction base. Extend to the end. As shown in FIGS. 4 and 5, the operation unit 512 includes a U-shaped portion 5121 extending from the holding portion 511, a curved surface portion 5123 positioned on the Z-direction base end side, and a U-shaped portion. 5121 and a connecting portion 5125 for connecting the curved surface portion 5123.
An opening 5122 straddling the holding part 511 is formed in the approximate center of the U-shaped part 5121. In the opening 5122, a clamping member 54 that pivotally clamps the polarizing plate holding member 51 on the attachment member 53 is disposed.

As shown in FIG. 8, the curved surface portion 5123 has a surface 5123 </ b> A on the distal end side in the Y direction as viewed from the base end side in the Z direction formed in a convex curved surface shape, that is, an arc shape. The surface 5123 </ b> A faces a concave curved surface portion 5363 described later of the attachment member 53. Such a curved surface portion 5123 is a part for preventing the polarizing plate holding member 51 from rotating.
Further, as shown in FIGS. 4, 5, and 8, a protruding portion 5124 that protrudes toward the Y direction front end side is provided at the end portion on the X direction front end side of the curved surface portion 5123. The protruding portion 5124 is exposed to the front end side in the Y direction of the mounting member 53 through an opening 5364 described later of the mounting member 53. When the polarizing plate holding member 51 is attached to the attachment member 53, the protruding portion 5124 exposed on the Y direction front end side is moved along the X direction, so that the polarizing plate holding member 51 moves in the Z direction. It is rotated as the center, and consequently the incident side polarizing plate 352 is rotated.

[Configuration of compensation plate holding member]
As described above, the compensation plate holding member 52 is attached to the second attachment portion 533 located on the distal end side in the Z direction in the attachment member 53 while holding the optical compensation plate 353. Similar to the polarizing plate holding member 51, the compensation plate holding member 52 is a metal member having a substantially L shape in side view formed by bending a sheet metal. As shown in FIGS. 4 to 7, such a compensation plate holding member 52 includes a holding portion 521 that holds the optical compensation plate 353 along the XY plane, and a Z-direction base from the Y-direction tip of the holding portion 521. And an operation unit 522 extending toward the end side. Such a compensation plate holding member 52 has substantially the same configuration as the polarizing plate holding member 51 except that the shape of both end edges in the X direction of the holding portion 521 is different.

FIG. 9 is a view of the fixing member 5 as viewed from the light beam exit side (Z-direction front end side), and mainly shows the compensation plate holding member 52.
Specifically, as shown in FIG. 9, the holding portion 521 is formed in a rectangular shape whose longitudinal direction is the Y direction when viewed from the front end side in the Z direction. A rectangular opening 5211 (see FIG. 5) is formed at substantially the center of the holding portion 521, and one edge on the front end side in the Y direction and 2 on the base end side in the Y direction are formed at the edge of the opening 5211. In addition, two locking portions 5212 are provided on the tip end side in the X direction (+ X direction side). By these locking portions 5212, the optical compensation plate 353 is locked to the end surface of the holding portion 521 on the tip side in the Z direction.

  Further, arc-shaped guide holes 5213 penetrating the holding portion 521 are formed in line proximity in the vicinity of both ends in the X direction on the tip end side in the Y direction of the holding portion 521. The pins 5332 of the attachment member 53 are inserted into the guide holes 5115, thereby guiding the rotation of the compensation plate holding member 52.

Further, arc-shaped portions 5214 are formed at substantially the center portions in the Y direction at both ends of the holding portion 521 in the X direction. That is, the formation position of each arc-shaped portion 5214 in the holding portion 521 is along the X direction when the compensation plate holding member 52 is viewed from the tip end side in the Z direction, and is the center point of rotation of the compensation plate holding member 52 It is a position on a straight line passing through C2. These arcuate portions 5214 face a second restricting portion 5333, which will be described later, of the attachment member 53, thereby preventing the compensator plate holding member 52 from being translated in the X direction.
Note that the arc-shaped portion 5214 is formed in an arc shape with a central portion protruding outward (± X direction) when viewed from the Z-direction front end side, and is compensated by being in contact with the second restricting portion 5333. It is comprised so that rotation of the board holding member 52 may not be prevented.

The operation unit 522 corresponds to the second operation unit of the present invention. As shown in FIGS. 6, 7, and 9, the operation unit 522 is positioned on the front end side in the Y direction with respect to an extension part 536 (described later) of the mounting member 53, and is held along the extension part 536. 521 extends from the end portion on the Y direction front end side to the Z direction base end side. Such an operation unit 522 includes a U-shaped part 5221 extending from the holding part 521, a curved surface part 5223 positioned on the distal end side in the Z direction, and a connection part 5225 for connecting the U-shaped part 5221 and the curved surface part 5223. Have
A rectangular opening 5222 similar to the U-shaped part 5121 is formed in the center of the U-shaped part 5221, and the main body part 531 of the mounting member 53 and the compensation plate holding member 52 are formed in the opening 5222. A sandwiching member 54 is disposed.

In the curved surface portion 5223, a surface 5223A on the base end side in the Y direction as viewed from the front end side in the Z direction is formed in a concave curved surface shape, that is, an arc shape. The surface 5223A faces a convex curved surface portion 5362, which will be described later, of the attachment member 53. Such a curved surface part 5223 is a part for preventing the rotation of the compensation plate holding member 52 from being hindered.
Further, a protruding portion 5224 that protrudes toward the Y-direction distal end side is provided at the end portion on the X-direction base end side (−X-direction side) of the curved surface portion 5223. By moving the projecting portion 5224 along the X direction, the compensation plate holding member 52 and thus the optical compensation plate 353 held by the attachment member 53 are rotated about the Z direction (illumination optical axis Ax). be able to.

[Configuration of mounting members]
As described above, the mounting member 53 supports the polarizing plate holding member 51 and the compensation plate holding member 52 so as to be independently rotatable about the Z direction (illumination optical axis Ax), and the mounting portion 421 described above. It is a member attached to. Specifically, as shown in FIGS. 5 and 7, the attachment member 53 is an integrally molded product made of synthetic resin formed in a substantially L shape in a side view. Such an attachment member 53 includes a plate-like main body portion 531 along the XY plane, and an extending portion 536 extending from the Y-direction distal end portion to the Z-direction proximal end side of the main body portion 531.

  The main body portion 531 penetrates the main body portion 531 along the Z direction, a first attachment portion 532 located on the Z direction proximal end side in the main body portion 531, a second attachment portion 533 located on the Z direction distal end side, and the main body portion 531. An opening portion 534 and an air guide portion 535.

  The first attachment portion 532 supports the polarizing plate holding member 51. As shown in FIG. 5, a protrusion 5321 that protrudes toward the base end side in the Z direction is formed at the end of the first attachment portion 532 on the tip end side in the Y direction. The end surface on the base end side in the Z direction of the protruding portion 5321 is a first sliding surface 5322 on which the polarizing plate holding member 51 is rotatably contacted. That is, the polarizing plate holding member 51 is rotated while sliding along the first sliding surface 5322. A pair of pins 5323 protrude from the first sliding surface 5322, and the pins 5323 are inserted into the guide holes 5115 formed in the polarizing plate holding member 51.

In addition, the protruding portion 5321 is formed with a through hole 5324 penetrating in the Y direction. The clamping member 54 is attached so as to sandwich the edge of the through hole 5324 on the proximal side in the Z direction and the polarizing plate holding member 51. Although illustration is omitted, a projection for locking the clamping member 54 is provided in the through hole 5324.
As will be described later in detail, such a through hole 5324 also functions as an exhaust port for discharging the air flowing from the Y direction base end side to the outside.

Further, as shown in FIGS. 5 and 8, a first restricting portion 5325 is formed at the approximate center in the Y direction at both ends in the X direction of the first mounting portion 532. These first restricting portions 5325 are respectively formed at positions corresponding to the respective protruding portions 5114 of the polarizing plate holding member 51 attached to the attaching member 53. That is, in the first attachment portion 532, each first restriction portion 5325 is provided at a position along a straight line that passes along the X direction and passes through the center point C1 described above. In other words, each first restricting portion 5325 is positioned on both sides of the polarizing plate holding member 51 in the X direction corresponding to the width direction among the directions orthogonal to the illumination optical axis Ax passing through the center point C1 in the first mounting member 532. It stands up from a position corresponding to the end portion.
In such a first restricting portion 5325, the surfaces facing each other, that is, the surfaces facing the corresponding protrusions 5114 are formed in a convex curved shape with the central portion bulging when viewed from the Z-direction base end side. . The first restricting portion 5325 having such a convex curved surface and the planar protruding portion 5114 prevent the polarizing plate holding member 51 attached to the attachment member 53 from being prevented from rotating.

The first sliding surface 5322 and the surface on which the first restricting portion 5325 is formed are not located on the same plane because the surface of the polarizing plate holding member 51 that is in contact with the first sliding surface 5322. Since the pair of bent portions 5113 extend to the tip end side in the Z direction, and the incident side polarizing plate 352 is disposed inside the pair of bent portions 5113, the bent portions 5113 and the protruding portions 5114 This is because it is necessary to absorb the dimensions.
In addition, the bent portion 5113 and the protruding portion 5114 are not formed into a convex curved surface, and the surface of the first restricting portion 5325 is formed into a convex curved surface because the bent portion 5113 bends the sheet metal. Therefore, it is possible to improve the accuracy of the convex curved surface by making the first restricting portion 5325 of the mounting member 53 manufactured by injection molding or the like into a convex curved surface rather than making the bent portion 5113 and the protruding portion 5114 into an arc shape. This is because it can.

  The second attachment portion 533 is attached independently of the polarizing plate holding member 51 so that the compensation plate holding member 52 can rotate. The surface of the second mounting portion 533, that is, the surface on the front end side in the Z direction of the main body portion 531 is a second sliding surface 5331 with which the compensation plate holding member 52 is rotatably contacted. That is, the compensation plate holding member 52 is rotated while sliding along the second sliding surface 5331. In the region on the tip end side in the Y direction on the second sliding surface 5331, pins 5332 inserted into the guide holes 5213 are formed in the vicinity of both ends in the X direction.

In addition, a second restricting portion 5333 that faces the arc-shaped portion 5214 of the compensation plate holding member 52 is formed at substantially the center in the Y direction at both ends in the X direction of the second mounting portion 533. That is, in the second attachment portion 533, each second restriction portion 5333 is provided at a position along a straight line along the X direction and passing through the center point C2. In other words, each second restricting portion 5333 is positioned on both sides of the compensation plate holding member 52 in the X direction corresponding to the width direction among the directions orthogonal to the illumination optical axis Ax passing through the center point C2 in the second mounting member 533. It stands up from a position corresponding to the end portion.
In such second restricting portion 5333, the surfaces facing each other, that is, the surfaces facing the corresponding arc-shaped portion 5214 are formed in a planar shape. The flat second restricting portion 5333 and the arc-shaped portion 5214 prevent the compensation plate holding member 52 attached to the attachment member 53 from being prevented from rotating.

  Contrary to the first restricting portion 5325 having the convex curved surface in the mounting member 53 and the planar protruding portion 5114 in the polarizing plate holding member 51, an arcuate portion 5214 is provided in the compensation plate holding member 52. The reason why the planar second restricting portion 5333 is provided in the second mounting portion 533 is that a highly accurate arc portion (convex curved surface) can be formed with respect to the plate-shaped compensation plate holding member 52. However, the present invention is not limited thereto, and the compensation plate holding member 52 may not be provided with the arc-shaped portion 5214, and the surface of the second restricting portion 5333 facing the compensation plate holding member 52 may be formed in an arc shape (convex curved surface shape). .

As shown in FIGS. 5 and 7, the opening 534 enters the light transmitted through the incident-side polarizing plate 352 held by the polarizing plate holding member 51 into the optical compensation plate 353 held by the compensation plate holding member 52. Let The opening 534 is formed in a rectangular shape larger than the light transmission region.
The air guide section 535 guides air, which is blown by the cooling device 9 described later, and flows from the Y-direction proximal end side to the Y-direction distal end side, to the liquid crystal panel 354 located on the light beam emission side of the optical compensation plate 353. The configuration of the air guide portion 535 and the flow direction of the air guided by the air guide portion 535 will be described in detail later.

As described above, the extending portion 536 is a portion that extends from the Y-direction distal end portion of the main body portion 531 to the Z-direction proximal end side, and is formed in a plate shape.
As shown in FIGS. 5 and 7, an opening 5361 having a substantially rectangular shape as viewed from the front end side in the Y direction is formed in a portion of the extending portion 536 on the front end side in the Z direction. Of the edges forming the opening 5361, the edge on the Z-direction tip side is formed by the main body part 531, and the edge on the Z-direction tip side and the compensation plate holding member 52 are sandwiched. A clamping member 54 is attached. In addition, a protrusion that locks the clamping member 54 is formed on the end surface of the main body portion 531 on the proximal side in the Z direction, that is, the first attachment portion 532, and the protrusion is an opening formed in the clamping member 54. It is inserted into the part 541 (see FIG. 5).

  On the end surface 536A on the distal end side in the Y direction of the extending portion 536, a convex surface facing the surface 5223A which is a convex curved surface in the curved surface portion 5223, at the position on the proximal side in the Z direction from the opening 5361, as shown in FIG. A curved surface portion 5362 is formed. The convex curved surface portion 5362 is a convex arcuate curved surface along the rotation direction of the compensation plate holding member 52. The convex curved surface portion 5362 and the curved surface portion 5223 are smoothly performed without hindering the rotation of the compensation plate holding member 52.

  On the other hand, the end surface 536B on the Y direction base end side of the extending portion 536 is opposed to the surface 5123A which is a concave curved surface in the curved surface portion 5123, as shown in FIG. A concave curved surface portion 5363 is formed. The concave curved surface portion 5363 is a concave arcuate curved surface along the rotation direction of the polarizing plate holding member 51, and the concave curved surface portion 5363 is formed on the convex surface formed on the end surface 536A opposite to the end surface 536B. This corresponds to the formation position of the curved surface portion 5362. The concave curved surface portion 5363 and the curved surface portion 5223 can be smoothly performed without hindering the rotation of the polarizing plate holding member 51.

  Note that the convex curved surface portion 5362 and the surface 5223A do not always need to be in contact with each other, and a convex curved surface portion 5362 is formed along the locus of the curved surface portion 5223 so that the rotation of the compensation plate holding member 52 is not hindered. It only has to be. Similarly, the concave curved surface portion 5363 and the surface 5123A do not always have to contact each other, and the concave curved surface portion 5363 along the locus of the curved surface portion 5123 is formed so as not to hinder the rotation of the polarizing plate holding member 51. It only has to be done.

  Further, in the extending portion 536, an opening 5364 through which the protruding portion 5124 of the polarizing plate holding member 51 is inserted penetrates the extending portion 536 along the Y direction on the proximal side in the Z direction from the convex curved surface portion 5362. It is formed to do. The protrusion 5124 inserted through the opening 5364 and the protrusion 5224 of the compensation plate holding member 52 are exposed on the same side (that is, the front end side in the Y direction) in the extension 536. For this reason, it is easy to perform an operation on the protrusions 5124 and 5224, that is, a rotation operation of the polarizing plate holding member 51 and the compensation plate holding member 52.

  Further, in the extended portion 536, on the proximal side in the Z direction from the opening 5364, a hole 5366 through which the above-described screw SC (see FIG. 3) is inserted, and a pair of holes that sandwich the hole 5366 in the X direction. A fixing portion 5365 having 5367 is provided. Among these, after inserting the pin 422 (see FIG. 3) through the pair of holes 5367, the screw SC is attached to the screw hole of the lid-like member 42 through the hole 5366, so that the attachment member 53, As a result, the fixing member 5 can be fixed to the lid-like member 42.

[Configuration of clamping member]
The two clamping members 54 are leaf springs each having a substantially U-shaped cross section. Among these clamping members 54, one clamping member 54 forms a holding hole 511 and a through hole 5324 formed in the protrusion 5321 through the opening 5122, as shown in FIGS. 4 and 8. The edge on the direction base end side is sandwiched. The polarizing plate holding member 51 is rotatably held by the holding member 54 with respect to the mounting member 53.
Further, as shown in FIGS. 6 and 9, the other holding member 54 holds the holding portion 521 and the main body portion 531 through the opening 5222. By this clamping member 54, the compensation plate holding member 52 is pivotally clamped with respect to the mounting member 53.
These clamping members 54 are formed with substantially rectangular openings 541 (see FIG. 5), and the projections formed on the attachment member 53 are inserted into the openings 541, respectively. Omission is prevented.

[Configuration of wind guide section and air flow guided by the wind guide section]
FIG. 10 is a diagram for explaining the flow direction of the air guided by the air guide section 535.
As shown in FIG. 10, the cooling device 9 includes a cooling fan (not shown) and a duct 91 that guides air sent from the cooling fan to a lower side of an electro-optical device 35 described later. .
The air discharged from the cooling fan passes through the duct 91, the fixing member 5 holding the incident side polarizing plate 352 and the optical compensation plate 353, the liquid crystal panel 354, and the outgoing side polarizing plate 355 (not shown in FIG. 10). ). Then, the air flows from the Y direction base end side to the Y direction front end side along the incident side polarizing plate 352, the optical compensation plate 353, the liquid crystal panel 354, and the output side polarizing plate 355.

For example, the air blown to the light incident side of the incident side polarizing plate 352 flows in the A1 direction along the surface of the incident side polarizing plate 352 and the polarizing plate holding member 51 on the light incident side. Thereby, the light-incident-side surface (the Z-direction base end surface) of the incident-side polarizing plate 352 and the polarizing plate holding member 51 through which the heat of the incident-side polarizing plate 352 is conducted is cooled.
Further, the air blown between the incident side polarizing plate 352 and the first mounting portion 532 of the mounting member 53 circulates in the A2 direction through the space between the polarizing plate holding member 51 and the first mounting portion 532. . As a result, the light exit side surfaces of the incident side polarizing plate 352 and the polarizing plate holding member 51 are cooled. The air flows through the through hole 5324 formed in the first attachment portion 532 and is discharged to the outside.

  The air blown to the Y direction proximal end of the attachment member 53 and the compensation plate holding member 52 flows in the A3 direction. Specifically, the air hits the air guide portion 535 formed at the base end portion in the Y direction of the mounting member 53 and is guided to the liquid crystal panel 354 side by the air guide portion 535. The inclination angle of the air guide portion 535 is set so that the air guided from the air guide portion 535 is directed toward the inclined portion 3545 of the frame 3542 located on the front end side in the Y direction from the air guide portion 535. For this reason, the air guided by the air guide portion 535 flows toward the inclined portion 3545.

On the other hand, the air blown to the Y direction base end side in the liquid crystal panel 354 is diverted at the end of the Y direction base end side, and a part of the air is emitted from the liquid crystal panel 354 along the A4 direction. The other part of the air travels toward the light beam incident side of the liquid crystal panel 354 along the A5 direction.
Of these, the air flowing along the A4 direction is normally separated from the end surface of the liquid crystal panel 354 on the light beam incident side as it goes toward the front end side in the Y direction. In this case, it is difficult to cool the liquid crystal panel 354 appropriately.

  On the other hand, in the projector 1 according to the present embodiment, the air flowing along the A4 direction collides with the air flowing along the A3 direction in the vicinity of the inclined portion 3545. As a result, the air that circulates gradually away from the liquid crystal panel 354 as described above merges with the air that circulates along the A3 direction, and B along the end surface of the liquid crystal panel 354 on the light beam incident side. Circulate in the direction. Accordingly, the air flow direction can be set to a position close to the end surface of the liquid crystal panel 354 on the light beam incident side, and the liquid crystal panel 354 can be effectively cooled.

Further, the air blown to the Y direction proximal end of the attachment member 53 and the compensation plate holding member 52 can also be circulated along the end face on the light beam incident side. Accordingly, since the amount of air blown to the liquid crystal panel 354 can be increased, the liquid crystal panel 354 can be more effectively cooled.
The air flowing along the A5 direction is merged with the air flowing along the A6 direction between the liquid crystal panel 354 and the emission-side polarizing plate 355. Thereby, the end surface (end surface on the tip side in the Z direction) of the light emission side of the liquid crystal panel 354 is cooled.

The projector 1 according to the present embodiment described above has the following effects.
The polarizing plate holding member 51 is rotatably attached to the first mounting portion 532 of the mounting member 53, and the polarizing plate holding member 51 is attached to the second mounting portion 533 located on the opposite side of the first mounting portion 532. Independently, the compensation plate holding member 52 is rotatably attached. According to this, the polarizing plate holding member 51 that holds the incident-side polarizing plate 352 and the compensation plate holding member 52 that holds the optical compensation plate 353 are attached to the attachment member 53 so that their positions can be adjusted independently. be able to. Therefore, when one of the incident side polarizing plate 352 and the optical compensation plate 353 is adjusted in position, the other does not move, and the position adjustment of the incident side polarizing plate 353 and the optical compensation plate 353 can be easily performed.

  The extension portion 536 of the attachment member 53 is provided with a fixing portion 5365 for fixing the attachment member 53 to the upper surface of the lid-like member 42 of the optical component housing 4. According to this, by fixing the attachment member 53 to the optical component casing 4 in which the optical devices 32 to 34 are accommodated, the incident-side polarizing plate 352 and the optical compensator are retrofitted to the optical component casing 4. 353 can be attached so that the position can be adjusted. Therefore, the manufacturing process of the projector 1 can be simplified as compared with the case where the attachment member 53 is provided in the optical component casing 4.

  Further, the mounting member 53 attached to the upper surface of the lid-like member 42 is replaced, or the corresponding holding member is exchanged from the mounting member 53 removed from the upper surface, and the mounting member 53 is replaced with the lid-like member 42. It is possible to replace at least one of the incident side polarizing plate 352 and the optical compensation plate 353 by re-attaching to the optical plate. Therefore, the replacement work of the incident side polarizing plate 352 and the optical compensation plate 353 can be easily performed.

  The protruding portion 5124 operated when the polarizing plate holding member 51 is rotated and the protruding portion 5224 operated when the compensator plate holding member 52 is rotated are located on the same side in the extending portion 536. That is, these protrusions 5124 and 5224 are exposed to the end surface 536A side of the extending portion 536. According to this, the rotation operation of the polarizing plate holding member 51 and the compensation plate holding member 52 can be performed on the same side in the extending portion 536, respectively. Therefore, the position adjusting operation of the polarizing plate holding member 51 and the compensation plate holding member 52 can be easily performed.

  In the first mounting portion 532, the first restricting portion 5325 is provided at a position that passes through the rotation center point C <b> 1 of the polarizing plate holding member 51 and corresponds to both ends of the polarizing plate holding member 51 in the X direction. . Further, in the second mounting portion 533, the second restricting portion 5333 is provided at a position that passes through the rotation center point C2 of the compensation plate holding member 52 and corresponds to both ends of the compensation plate holding member 52 in the X direction. ing. According to this, the polarizing plate holding member 51 and the compensation plate holding member 52 are not rotated by the first restricting portion 5325 and the second restricting portion 5333, and along the first attaching portion 532 and the second attaching portion 533. Thus, it is possible to regulate the parallel movement in the X direction. Therefore, the polarizing plate holding member 51 and the compensation plate holding member 52 can be easily rotated, and the position adjustment operation of the polarizing plate holding member 51 and the compensation plate holding member 52 can be easily performed.

A surface of the first restricting portion 5325 facing the bent portion 5113 and the protruding portion 5114 is formed in a convex curved surface shape, and a surface of the protruding portion 5114 facing the first restricting portion 5325 is formed in a flat shape. . According to this, when the first restricting portion 5325 and the protruding portion 5114 come into contact with each other, the planar portion moves smoothly along the convex curved portion, so that the polarizing plate holding member 51 can be easily rotated. can do. In addition, the formation of the first restricting portion 5325 and the protruding portion 5114 is easier than the case where one has a convex curved surface and the other has a concave curved surface. Therefore, the polarizing plate holding member 51 can be easily rotated while preventing the polarizing plate holding member 51 from moving in parallel along the X direction.
The surface of the second restricting portion 5333 that faces the compensation plate holding member 52 is flat, and the end of the compensation plate holding member 52 that faces the second restricting portion 5333 is formed in a convex curved shape. Similarly, the compensator holding member 52 can be easily rotated while preventing the compensator holding member 52 from being translated along the X direction.

The bent portion 5113 and the protruding portion 5114 are not formed into a convex curved surface shape, and the surface of the first restricting portion 5325 facing them is formed into a convex curved surface shape, whereby the accuracy of the convex curved surface can be increased. In addition, since the surface of the bent portion 5113 and the protruding portion 5114 that faces the first restricting portion 5325 is planar, the polarizing plate holding member 51 can be easily rotated as described above. Therefore, the polarizing plate holding member 51 can be stably rotated.
In addition, since the polarizing plate holding member 51 has the bent portion 5113 and the protruding portion 5114, the incident light enters the space surrounded by the first mounting portion 532, the bent portion 5113 and the protruding portion 5114, and the holding portion 511. A flow path through which air for cooling the side polarizing plate 352 flows (flow path of air flowing along the A2 direction) can be formed. According to this, air can be effectively blown to the incident side polarizing plate 352 by circulating air through the flow path. Therefore, the incident side polarizing plate 352 can be effectively cooled.

  By providing the air guide portion 535 at the Y direction base end portion of the mounting member 53, air flowing from the Y direction base end side to the mounting member 53 can be guided to the liquid crystal panel 354. Therefore, the flow rate of air blown to the liquid crystal panel 354 can be increased, and the cooling efficiency of the liquid crystal panel 354 can be increased.

The air guide portion 535 is located on the Y direction base end side from the Y direction base end portion of the liquid crystal panel 354 and guides the blown air to the liquid crystal panel 354 at a position closer to the duct 91. According to this, air can be effectively guided to the liquid crystal panel 354, and air circulated toward the mounting member 53 can also be effectively guided to the liquid crystal panel 354. Therefore, the cooling efficiency of the liquid crystal panel 354 can be improved.
In particular, the air guided by the air guide portion 535 flows toward the inclined portion 3545 formed at the Y-direction base end portion of the frame 3542. According to this, the air is divided at the end of the frame 3542 on the base end side in the Y direction (the end on the upstream side in the air flow direction), on the optical compensation plate 353 side (liquid crystal panel). 354 light flux incident side), that is, the air flowing along the A4 direction. For this reason, the air and the guided air can be circulated along the end surface at a position close to the end surface of the liquid crystal panel 354 on the light beam incident side. Therefore, the liquid crystal panel 354 can be cooled more effectively.

  Since the rotation direction and range of the polarizing plate holding member 51 are defined by the guide hole 5115 into which the pin 5323 is inserted, the polarizing plate holding member 51 rotates along the first sliding surface 5322 of the first mounting portion 532. Can be made easier to implement. Similarly, the guide hole 5213 into which the pin 5332 is inserted can facilitate the rotation of the compensation plate holding member 52 along the second sliding surface 5331 of the second mounting portion 533.

[Modification of Embodiment]
The present invention is not limited to the above-described embodiment, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In the embodiment, the incident-side polarizing plate 352 is illustrated as the first optical component, and the optical compensation plate 353 is illustrated as the second optical component. However, the present invention is not limited to this. For example, optical components having other optical characteristics may be employed as the first optical component and the second optical component. For example, instead of the optical compensator for improving the contrast, a retardation plate for adjusting the polarization direction may be employed. Further, the optical compensation plate 353 is disposed at the rear stage of the liquid crystal panel 354, and the mounting member 53 includes a compensation plate holding member 52 for holding the optical compensation plate 353, and a polarizing plate holding member 51 for holding the output side polarizing plate 355. It is good also as a structure which attaches.

  In the above-described embodiment, the extending portion 536 of the mounting member 53 has the fixing portion 5365 fixed to the upper surface of the lid-like member 42 constituting the optical component casing 4, but the present invention is not limited thereto. Absent. That is, the position where the attachment member 53 is attached is not limited to the upper surface of the lid-like member 42. For example, the attachment position of the attachment member 53 may be the other side surface of the optical component housing 4 or a predetermined position in the exterior housing 2. Further, the extension portion 536 may not have the fixing portion 5365, and may be provided in the main body portion 531.

In the above-described embodiment, the operation unit 512 is located on the distal end side in the Y direction with respect to the extension portion 536, and the operation portion 522 is located on the proximal end side in the Y direction with respect to the extension portion 536. Is not limited to this. That is, the extension part 536 may not be provided, and the operation part 512 and the operation part 522 may extend in directions opposite to each other. For example, the operation unit 512 may extend to the Z direction proximal end side, and the operation unit 522 may extend to the Z direction distal end side.
Further, the projecting portions 5124 and 5224 may not be provided in the respective operation portions 512 and 522, and the operation portions 512 and 522 may be operated by a special jig.

  In the above-described embodiment, the formation position of the first restricting portion 5325 in the first attachment portion 532 is located on a straight line passing through the rotation center point C1 of the polarizing plate holding member 51 and along the X direction. The present invention is not limited to this. That is, as long as the parallel movement along the X direction of the polarizing plate holding member 51 can be restricted, the position where the first restricting portion 5325 is formed does not matter. The formation position of the 2nd control part 5333 in the 2nd attachment part 533 is also the same.

In the embodiment, the surface of the first restricting portion 5325 that faces the bent portion 5113 and the protruding portion 5114 has a convex curved surface, and the surface of the bent portion 5113 and the protruding portion 5114 that faces the first restricting portion 5325 is a flat surface. However, the present invention is not limited to this. That is, as long as the polarizing plate holding member 51 can be turned around the illumination optical axis Ax and the parallel movement along the X direction of the polarizing plate holding member 51 can be restricted, the shape of each surface is not limited.
The same applies to the shape of the surface of the second restricting portion 5333 that faces the compensation plate holding member 52 and the shape of the end face of the compensation plate holding member 52 that faces the second restricting portion 5333.

  In the embodiment, the polarizing plate holding member 51 has the bent portion 5113 and the compensator holding member 52 does not have the bent portion, but the present invention is not limited to this. That is, each of the holding members 51 and 52 may be configured to have a bent portion, or may be configured not to have a bent portion. For example, it is good also as a structure by which the incident side polarizing plate 352 is hold | maintained at the light beam incident side end surface of the holding | maintenance part 511 in the polarizing plate holding member 51. FIG.

In the embodiment described above, the wind guide portion 535 is provided at the end of the attachment member 53 on the base end side in the Y direction, but the present invention is not limited to this. That is, the air guide portion 535 may not be provided, and the position of the air guide portion 535 is not limited to the end portion on the Y direction base end side, and may be another position.
In addition, although the direction of the air that the air guide portion 535 guides is the inclined portion 3545 of the frame 3542, the present invention is not limited thereto, and if the air can be guided to the liquid crystal panel 354 to be cooled, Other directions may be used.

  In the embodiment, two guide holes 5115 and 5213 are formed in the polarizing plate holding member 51 and the compensation plate holding member 52, respectively, and inserted into the guide holes 5115 and 5213 in the first mounting portion 532 and the second mounting portion 533, respectively. Pins 5323 and 5332 are provided. However, the present invention is not limited to this. That is, the number of guide holes and pins may be one, or three or more. Further, the holding members 51 and 52 may have pins, and the first mounting portion 532 and the second mounting portion 533 may have guide holes.

In the embodiment, the projector 1 includes the three liquid crystal panels 354, but the present invention is not limited to this. That is, the present invention can also be applied to a projector using two or less or four or more liquid crystal panels.
In the above embodiment, the configuration in which the optical unit 3 has a substantially L shape in plan view has been described. However, the configuration is not limited thereto, and for example, a configuration having a substantially U shape in plan view may be employed.
In the above-described embodiment, the transmissive liquid crystal panel 354 having a different light beam incident surface and light beam emission surface is used. However, a reflective liquid crystal panel having the same light incident surface and light emission surface may be used.

  In the above-described embodiment, the projector 1 including the liquid crystal panel 354 is exemplified as the light modulation device. A modulation device may be employed. For example, the present invention can be applied to a projector using a light modulation device other than liquid crystal, such as a device using a micromirror. When such a light modulation device is used, the polarizing plates 352 and 355 can be omitted.

  The present invention can be suitably used for a projector.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 4 ... Optical component housing, 31 ... Light source device, 32 ... Illumination optical device (other optical components), 33 ... Color separation optical device (other optical components), 34 ... Relay optical device (others) Optical component), 36 ... Projection lens (projection optical device), 51 ... Polarizing plate holding member (first holding member), 52 ... Compensation plate holding member (second holding member), 53 ... Mounting member, 352 ... Incident side polarized light Plate (first optical component), 353... Optical compensator (second optical component), 354... Liquid crystal panel (light modulation device), 511... Holding portion, 512 .. operation portion (first operation portion), 522. (Second operation part) 531 ... main body part, 532 ... first attachment part, 533 ... second attachment part, 535 ... wind guide part, 536 ... extension part, 3541 ... panel body (apparatus body), 3542 ... frame 3545 ... Inclined part 5113 ... Bent part 5224 ... Out unit, 5325 ... first restricting portion, 5333 ... second regulation portion, 5364 ... opening, 5365 ... fixing unit.

Claims (9)

A light source device;
A light modulation device that modulates light emitted from the light source device;
A projection optical device that projects the modulated light; and
A first optical component disposed on an optical path of light emitted from the light source device ;
A second optical component disposed on the optical path of the light emitted from the light source device and receiving light transmitted through the first optical component ; and
A first holding member for holding the first optical component;
A second holding member for holding the second optical component;
An attachment member to which the first holding member and the second holding member are attached;
The mounting member is
A first mounting portion to which the first holding member is rotatably mounted;
A second attachment portion before Symbol second holding member is rotatably mounted,
A main body having the first mounting portion and the second mounting portion;
I have a,
The projector, wherein the first holding member and the second holding member rotate independently . The projector according to claim 1.
The first mounting portion has a first sliding surface with which the first holding member is rotatably contacted,
The second mounting portion has a second sliding surface with which the second holding member is rotatably contacted,
The first sliding surface is formed on one side of the main body,
The projector is characterized in that the second sliding surface is different from the first sliding surface and is formed on the other side of the main body. The projector according to claim 1 or 2 ,
Other optical components disposed on the optical path;
An optical component housing in which the other optical components are housed, and
The mounting member is
From the end portion of the front Stories body portion, and a extending portion of the first mounting portion extending on a side position relative to the second mounting portion,
The extension part is provided with a fixing part for fixing the mounting member to the optical component casing. The projector according to claim 3 .
The first holding member has a first operation portion that extends along the extending portion and rotates the first holding member;
The second holding member has a second operation portion that extends along the extending portion and rotates the second holding member,
The projector according to claim 1, wherein the first operation unit includes a protruding portion exposed to a side where the second operation unit is located through an opening formed in the extension portion. The projector according to any one of claims 1 to 4 ,
The mounting member is
A first restricting portion that stands up from a position in the first mounting portion corresponding to ends located on both sides in the width direction perpendicular to the central axis of rotation of the first holding member;
A second restricting portion that rises from a position in the second mounting portion corresponding to the end portions located on both sides in the width direction perpendicular to the central axis of rotation of the second holding member. Projector. The projector according to claim 5 , wherein
Of the end portions of the first holding member facing the first restricting portion and the first restricting portion, one has a convex curved surface, the other has a flat surface,
Of the second restricting portion and the end portion of the second holding member facing the second restricting portion, one has a convex curved surface and the other has a flat surface. The projector according to claim 6 ,
The first holding member is
A flat holding portion to which the first optical component is attached;
A bent portion that is provided at both ends of the holding portion in the width direction and bends toward the mounting member.
The first restricting portion has the convex curved surface on a surface facing the bent portion,
The projector is characterized in that the bent portion has the flat surface on a surface facing the first restricting portion. The projector according to any one of claims 1 to 7 ,
The mounting member includes a wind guide portion that guides air flowing along the mounting member to a cooling target disposed on at least one of a light beam incident side and a light beam emitting side of the mounting member. The projector according to claim 8 , wherein
The light modulation device is disposed on a light beam emission side of the second optical component,
The light modulation device comprises:
An apparatus body for modulating incident light;
A frame that houses the device main body therein,
The object to be cooled is the light modulation device,
The frame is formed at an upstream end in a direction in which the air flows, and has an inclined portion that inclines in a direction away from the attachment member toward the upstream.
The projector is characterized in that the air guide portion is located upstream of the inclined portion in the air flow direction and guides air toward the inclined portion.

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