JP2009169046A - Compensation element adjustment mechanism and projector - Google Patents

Abstract

Disclosed is a compensation element adjustment mechanism and a projector, which can easily finely adjust the mounting posture of an optical compensation element.
A compensation element adjustment mechanism includes an optical compensation element 10 disposed between a liquid crystal panel 25b and a polarizing plate 25f, and a first frame having a pair of shaft members 31b and 31c supporting the optical compensation element 10. 31, a second frame 32 that rotatably supports the shaft members 31b and 31c, a support holder 33 that is fixed to the liquid crystal panel 25b and rotatably supports the second frame 32, and a shaft member 31b, A fixing portion that restricts the displacement caused by the rotation of 31c by elastic contact; an engagement portion that engages the second frame 32 with the support holder 33; and the second frame 32 is rotatable. And a support part that supports the support frame 33 by the support holder 33 and restricts the displacement caused by the rotation of the second frame 32 by elastic contact.
[Selection] Figure 5

Description

  The present invention relates to a compensation element adjustment mechanism for optical compensation of a liquid crystal panel, and a projector incorporating the compensation element adjustment mechanism.

  2. Description of the Related Art Conventionally, in an optical apparatus for forming an optical image incorporated in a projector, an optical compensation sheet is disposed on the incident side or the exit side of a liquid crystal panel, as disclosed in Japanese Patent Application Laid-Open No. 2004-133620. Then, in order to adjust the mounting posture of the optical compensation sheet, a holder that can rotate the optical compensation sheet around the optical axis or about a rotation axis orthogonal to the optical axis is used. Yes. For example, when the optical compensation sheet is rotated together with the frame around a rotation axis orthogonal to the optical axis, the pair of shaft portions provided on the frame body are pivotally supported by a pair of pivot portions projecting from the fixing member. After the adjustment, the frame is screwed to the fixing member.

JP 2007-78735 A

  However, in the holder as described above, fine adjustment of the mounting posture of the optical compensation sheet (optical compensation element) is not easy. In other words, it is indispensable to fix the frame after adjusting the posture of the frame, and when fixing with a screw after adjusting the frame, the posture of the frame is likely to change again, and the optical compensation sheet (optical compensation element) There is a problem that precise adjustment of the mounting posture and subsequent fixing are not easy.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A compensation element adjustment mechanism according to this application example includes: (a) an optical compensation element disposed between a liquid crystal panel and a polarizing plate; and (b) an optical compensation element while supporting the optical compensation element. A first frame having a pair of shaft members provided at positions facing each other, (c) a second frame that rotatably supports the pair of shaft members of the first frame, and (d) on the liquid crystal panel side A support holder that is fixed and rotatably supports the second frame; (e) a fixing portion that restricts displacement due to rotation of the pair of shaft members by elastic contact; and (f) the second frame. An engaging portion that engages the support holder to turn the second frame, and (g) supports the second frame on the support holder and elastically contacts the displacement caused by the rotation of the second frame. And a support portion that is restricted by the above.

  In the compensation element adjustment mechanism, the first frame that supports the optical compensation element has a pair of shaft members provided at positions facing each other around the optical compensation element, and the second frame has the pair of shaft members. By pivotally supporting the first frame, that is, the mounting posture of the optical compensation element can be adjusted with respect to the liquid crystal panel. Therefore, for example, when the optical axis is set with respect to the liquid crystal panel, it is possible to adjust the mounting posture of the optical compensation element in the case of rotating around a rotation axis orthogonal to the optical axis. At this time, since the fixed portion restricts the displacement caused by the rotation of the pair of shaft members with respect to the second frame by elastic contact, the posture of the optical compensation element is changed by the desired amount together with the first frame and is held as it is. Therefore, it is possible to precisely adjust the mounting posture of the optical compensation element and to easily fix it after the adjustment. Further, by engaging the second frame with the support holder and making the second frame pivotable by the engaging portion, it is possible to adjust the mounting posture of the second frame, that is, the optical compensation element with respect to the liquid crystal panel. it can. Therefore, for example, when the optical axis is set with respect to the liquid crystal panel, it is possible to adjust the mounting posture of the optical compensation element when rotating around the optical axis. At this time, the support portion supports the second frame on the support holder and restricts the displacement caused by the rotation of the second frame by elastic contact. It can be changed and held as it is, and it is possible to precisely adjust the mounting posture of the optical compensation element and simply fix it after the adjustment. Therefore, the compensation element adjustment mechanism can adjust the mounting posture of the optical compensation element when rotating around a rotation axis orthogonal to the optical axis, for example, and optical when rotating around the optical axis, for example. The mounting posture of the compensation element can also be adjusted, and precise adjustment of the mounting posture of the optical compensation element and simple fixing after the adjustment are possible.

  Application Example 2 In the compensation element adjustment mechanism described above, the engagement portion includes a first engagement portion on the second frame and a second engagement portion on the support holder, and the first engagement portion. It is preferable that the second frame is rotatable with respect to the support holder by engagement between the second engagement portion and the second engagement portion. In this case, when the first engaging portion and the second engaging portion are engaged, the second frame can be rotated with respect to the support holder to adjust the posture of the second frame. For example, it is possible to adjust the attitude of the optical compensation element when rotating around the optical axis.

  Application Example 3 In the compensation element adjustment mechanism described above, one of the first engagement portion and the second engagement portion has a protrusion, and the other engagement portion It is preferable to have a recess formed substantially concentrically with the moving center, and the protrusion engages and slides with the recess. In this case, since the protrusion slides substantially concentrically with the rotation center by engaging and sliding with a recess formed substantially concentrically with the rotation center, the second frame is The posture of the second frame can be adjusted by rotating the support holder substantially concentrically with the rotation center. For example, when the rotation center is made coincident with the optical axis, the posture of the optical compensation element can be adjusted by rotating substantially concentrically with respect to the optical axis.

  Application Example 4 In the compensation element adjusting mechanism described above, the support portion finely adjusts the displacement amount by the rotation of the second frame relative to the support holder by locking the second frame or the support holder with a frictional force. Is preferably allowed. In this case, the optical compensation element can be fixed (supported) by the frictional force in a state in which the posture of the optical compensation element is finely adjusted against the frictional force.

  Application Example 5 In the compensation element adjusting mechanism described above, the support unit includes a first support unit in the second frame and a second support unit in the support holder, and the first support unit and the second support unit. It is preferable that the second frame is supported by the support holder by the part and is slid according to the rotation of the second frame. In this case, the second frame supported by the support holder can be stably rotated or fixed. Therefore, the mounting posture of the optical compensation element can be adjusted and fixed stably.

  Application Example 6 In the compensation element adjustment mechanism described above, it is preferable that the first support portion has a spring portion that sandwiches and supports the second support portion. In this case, it is possible to limit or fix the displacement of the second frame with a simple mechanism.

  Application Example 7 In the compensation element adjustment mechanism described above, it is preferable that the first frame has a first operation unit that rotates with respect to the second frame. In this case, it is possible to easily adjust the attitude of the optical compensation element by rotating the first frame that supports the optical compensation element with respect to the second frame using the first operation unit.

  Application Example 8 In the compensation element adjustment mechanism described above, it is preferable that the second frame has a second operation unit that rotates with respect to the support holder. In this case, it is possible to easily adjust the attitude of the optical compensation element by rotating the second frame that supports the first frame with respect to the support holder using the second operation unit.

  (Application Example 9) In the compensation element adjustment mechanism described above, the fixed portion locks the first frame or the second frame with a frictional force, and thereby the amount of displacement due to the rotation of the first frame relative to the second frame is reduced. It is preferable to allow fine adjustment. In this case, the posture of the optical compensation element can be fixed by the frictional force while being finely adjusted against the frictional force.

  Application Example 10 In the compensation element adjustment mechanism described above, the fixing unit includes a first fixing unit in the first frame and a second fixing unit in the second frame, and the first fixing unit and the second fixing unit. It is preferable to limit the displacement of the first frame relative to the second frame by elastic locking with the fixing portion. In this case, it is possible to easily fix the mounting posture of the optical compensation element by interposing the first fixing portion.

  Application Example 11 In the compensation element adjusting mechanism described above, it is preferable that the first fixing portion or the second fixing portion has a spring portion that performs elastic locking. In this case, it is possible to limit or fix the displacement of the first frame with a simple mechanism.

  Application Example 12 A projector according to this application example includes (a) the compensation element adjustment mechanism described above, (b) a light source device that emits a light beam by light emission, and (c) a light beam emitted from the light source device as image information. And (d) a projection optical device that projects an optical image formed by the light modulation device. The light modulation device includes a liquid crystal panel that modulates the optical image to form an optical image.

  In the projector, a light beam is emitted by light emission of the light source device, and an optical image is formed by modulating the light beam emitted from the light source device according to image information by the light modulation device having a liquid crystal panel. Then, the optical image formed by the light modulation device is projected by the projection optical device. At this time, since the compensation element adjustment mechanism having the simple structure as described above is used, the optical compensation element can be precisely arranged with a simple structure, and the contrast of the projected optical image (color image or the like) can be reduced. Can be easily increased.

  Hereinafter, embodiments will be described with reference to the drawings.

  FIG. 1 is a diagram showing the structure of the optical system of the projector according to the present embodiment. The configuration and operation of the optical system of the projector 100 will be described with reference to FIG.

  The projector 100 according to this embodiment divides the light beam emitted from the light source device 21 into a plurality of partial light beams and superimposes them on the liquid crystal panels 25a, 25b, and 25c to form an image. The illumination optical device 22 to be illuminated, the color separation optical system 23 that separates the light beam emitted from the light source device 21 into red, green, and blue three-color light, and each color light emitted from the color separation optical system 23, and according to image information And a light modulator 25 that modulates the light to form an optical image. The projector 100 also combines a cross dichroic prism 27 that combines the optical images of the respective color lights formed by the light modulation unit 25 and a combined optical image (such as a color image) emitted from the cross dichroic prism 27 on a screen (illustrated). And a projection lens 29 as a projection optical device for projecting to (omitted).

  The light source device 21 includes a light source lamp 21a, and in the present embodiment, a discharge-type high-pressure mercury lamp is used. The illumination optical device 22 includes a concave lens 22b, a pair of fly-eye lenses 22d and 22e, a polarization conversion member 22g, and a superimposing lens 22h. The concave lens 22b has a role of collimating the light beam from the light source lamp 21a, but may be omitted. The pair of fly-eye lenses 22d and 22e is composed of a plurality of element lenses arranged in a matrix, and these element lenses divide the light beam from the light source lamp 21a that has passed through the concave lens 22b into partial light beams and collect and collect them individually. Diverge.

  The polarization conversion member 22g converts the light beam emitted from the fly-eye lens 22e into, for example, only the S-polarized component perpendicular to the paper surface of FIG. The superimposing lens 22h appropriately superimposes (images) the light flux that has passed through the polarization conversion member 22g as a whole, thereby enabling superimposing illumination on the light modulation device for each color light provided in the light modulation unit 25. Accordingly, the light beams that have passed through both the fly-eye lenses 22d and 22e and the superimposing lens 22h pass through the color separation optical system 23, which will be described in detail below, and the liquid crystal panels 25a, 25b, 25c is uniformly superimposed and illuminated.

  The color separation optical system 23 includes a first dichroic mirror 23a, a second dichroic mirror 23b, three field lenses 23f, 23g, and 23h that are correction optical systems, and reflection mirrors 23j, 23m, 23n, and 23o. Composed. Here, the substantially white light beam from the light source device 21 is incident on the first dichroic mirror 23a through the superimposing lens 22h, the optical path being bent by the reflection mirror 23j. The first dichroic mirror 23a reflects, for example, red light and green light among the three colors of red, green, and blue, and transmits blue light. The second dichroic mirror 23b reflects, for example, green light and transmits red light among the incident red light and green light.

  The blue light that has passed through the first dichroic mirror 23a enters the field lens 23f through the reflection mirror 23m, for example, as S-polarized light. The green light reflected by the first dichroic mirror 23a and further reflected by the second dichroic mirror 23b is incident on the field lens 23g as S-polarized light, for example. Furthermore, the red light that has passed through the second dichroic mirror 23b remains, for example, S-polarized light, passes through the first lens LL1, the second lens LL2, and the reflection mirrors 23n and 23o, and then enters the field lens 23h for adjusting the incident angle. Incident. The first lens LL1, the second lens LL2, and the field lens 23h constitute a relay optical system. This relay optical system has a function of transmitting the image of the first lens LL1 almost directly to the field lens 23h via the second lens LL2.

  The light modulation unit 25 includes three liquid crystal panels 25a, 25b, and 25c, and three sets of polarizing plates 25e, 25f, and 25g arranged so as to sandwich the liquid crystal panels 25a, 25b, and 25c. Here, the blue light liquid crystal panel 25a disposed in the first optical path OP1 and the pair of polarizing plates 25e and 25e sandwiching the liquid crystal panel 25a are arranged so that the blue light in the optical image after the luminance modulation is 2 based on the image information. A liquid crystal light valve for blue light for dimensionally modulating the luminance is configured.

  Among these, the liquid crystal panel 25a includes, for example, a liquid crystal cell that performs a vertical alignment type operation, but may include a liquid crystal cell that performs a TN type operation. The liquid crystal panel 25a has a general structure in which a liquid crystal layer is sandwiched between a pair of substrates. The liquid crystal panel 25a includes an alignment film, a transparent common electrode layer, a black matrix, and the like on the incident side, that is, the front substrate side. An alignment film, a transparent pixel electrode, a circuit layer, and the like are provided on the substrate side. In the liquid crystal light valve for blue light, the optical compensation element 10 for improving contrast is incorporated, for example, between the polarizing plate 25e on the emission side and the liquid crystal panel 25a.

  Similarly, the green light liquid crystal panel 25b disposed in the second optical path OP2 and the corresponding polarizing plates 25f and 25f also constitute a green light liquid crystal light valve, and the red light disposed in the third optical path OP3. The liquid crystal panel 25c and the polarizing plates 25g and 25g also constitute a liquid crystal light valve for red light. The liquid crystal light valves for green light and red light also incorporate the optical compensation element 10 for improving contrast between, for example, the polarizing plates 25f and 25g on the emission side and the liquid crystal panels 25b and 25c.

  Blue light branched by passing through the first dichroic mirror 23a of the color separation optical system 23 enters the blue liquid crystal panel 25a via the field lens 23f. Green light branched by being reflected by the second dichroic mirror 23b of the color separation optical system 23 enters the green liquid crystal panel 25b via the field lens 23g. In the red light liquid crystal panel 25c, the red light branched by passing through the second dichroic mirror 23b enters through the field lens 23h.

  Each of the liquid crystal panels 25a to 25c is a non-light-emitting light modulation device that modulates the spatial intensity distribution of each incident color light, and the three color lights incident on each of the liquid crystal panels 25a to 25c are respectively transmitted to each liquid crystal panel 25a. ˜25c is modulated in accordance with the drive signal or image signal input as an electrical signal. At that time, the polarization directions of the respective color lights incident on the respective liquid crystal panels 25a to 25c are adjusted by the polarizing plates 25e, 25f, and 25g, and a predetermined polarization direction is obtained from the modulated light emitted from the respective liquid crystal panels 25a to 25c. Component light is extracted as an optical image. Furthermore, adjustment is performed by the optical compensation element 10 so that the phase modulation by the liquid crystal panels 25a to 25c is appropriate, and optical compensation of these is possible.

  The cross dichroic prism 27 is a photosynthetic member, has a substantially square shape in plan view in which four right angle prisms are bonded together, and a pair of dielectric multilayer films intersecting in an X shape at the interface where the right angle prisms are bonded to each other. 27a and 27b are formed. One dielectric multilayer film 27a reflects blue light, and the other dielectric multilayer film 27b reflects red light.

  The cross dichroic prism 27 reflects the blue light from the liquid crystal panel 25a by the dielectric multilayer film 27a and emits it to the right in the traveling direction, and the green light from the liquid crystal panel 25b through the two dielectric multilayer films 27a and 27b. The red light from the liquid crystal panel 25c is reflected by the dielectric multilayer film 27b and emitted to the left in the traveling direction.

  The projection lens 29 projects the color optical image synthesized by the cross dichroic prism 27 on a screen (not shown) installed outside the projector 100 at a desired magnification. That is, a color moving image or a color still image with a desired magnification corresponding to the drive signal or image signal input to each of the liquid crystal panels 25a to 25c is projected on the screen.

  In the projector 100 described above, the optical compensation element 10 incorporated in the light modulation unit 25 is used for the purpose of finely adjusting the phase modulation amount that could not be accurately adjusted by the liquid crystal panels 25a to 25c, for example, as described above. . By disposing such an optical compensation element 10 at an appropriate position in the liquid crystal light valve, it is possible to increase the contrast of light modulation by the light modulation unit 25 and to project a high-quality image. At this time, the thickness of the optical compensation element 10 and the rotation state and inclination state with respect to the optical axis correspond to the adjustment amount necessary for the birefringence phase difference provided by the liquid crystal panels 25a to 25c. It is desirable to set such thickness, rotation amount, and inclination amount for each of the liquid crystal panels 25a to 25c.

  FIG. 2 is a perspective view showing a structure of an optical unit constituting a part of the projector. The configuration and operation of the optical unit 30 will be described with reference to FIG.

  The optical unit 30 includes a cross dichroic prism 27, liquid crystal panels 25a, 25b, and 25c, and emission filter units 125a, 125b, and 125c. Three exit filter units 125a, 125b, and 125c are aligned and affixed to the three incident side surfaces of the cross dichroic prism 27, and the liquid crystal panel 25a faces the exit filter units 125a, 125b, and 125c. 25b and 25c are fixed in an aligned state. That is, the emission filter units 125a, 125b, and 125c are arranged on the emission side of the liquid crystal panels 25a, 25b, and 25c.

  Each of the emission filter units 125a, 125b, and 125c incorporates the exit-side polarizing plates 25e, 25f, and 25g shown in FIG. 1 and the optical compensation elements 10 for the respective color lights arranged so as to oppose them. The optical compensation element 10 functions as a compensation element adjustment mechanism for individually adjusting the rotation and tilting posture of the optical compensation element 10. A flat wiring cable CA extends from each of the liquid crystal panels 25a, 25b, and 25c.

  3A and 3B are diagrams showing the configuration of an emission filter unit having a compensation element adjustment mechanism and a liquid crystal panel. FIG. 3A is a plan view and FIG. 3B is a transparent front view. . 4 is a view showing the structure of the injection filter unit in FIG. 3, FIG. 4 (a) is a transparent front view, and FIG. 4 (b) is a right side view. FIG. 5 is a perspective view of the injection filter unit, FIG. 5 (a) is a perspective view showing a state before adjustment, and FIG. 5 (b) is a perspective view showing a state after adjustment. FIG. 6 is an exploded perspective view of the injection filter unit and the like. 7A and 7B are diagrams showing the structure of the second frame, FIG. 7A is a front view, and FIG. 7B is a right side view.

  3 shows the structure of the emission filter unit 125b having the green light liquid crystal panel 25b and the green light compensation element adjustment mechanism in the optical unit 30 in detail. Then, the optical compensation element 10 is rotated around the optical axis OA by the compensation element adjustment mechanism, and is also rotated with respect to the rotation axis RA substantially perpendicular to the optical axis OA. FIG. 4 shows a state similar to FIG. 3 in detail, and shows a state of the emission filter unit 125b having a compensation element adjustment mechanism excluding the liquid crystal panel 25b. FIG. 5A shows a state before adjustment of the optical compensation element 10 of the emission filter unit 125b. FIG. 5B shows the emission filter unit 125b in a state after adjustment of the optical compensation element 10 shown in FIG. The configuration and operation of the injection filter unit 125b will be described with reference to FIGS.

  As shown in FIGS. 3 and 6, the liquid crystal panel 25 b is fixed to the emission filter unit 125 b with screws 51. The emission filter unit 125b has a compensation element adjustment mechanism. The compensation element adjustment mechanism includes the first frame 31, the second frame 32, the support holder 33, in addition to the optical compensation element 10 and the polarizing plate 25f. And a third frame 37 as a support member.

  As shown in FIG. 6, the first frame 31 is formed by processing a metal material (sheet metal), has a substantially rectangular plate shape, and has a main body portion 31 a that supports the optical compensation element 10. . And the main-body part 31a has the opening part W1 opened in the substantially rectangular shape in the center, and the optical compensation element 10 is affixed on the surface at the side of the liquid crystal panel 25b so that this opening part W1 may be block | closed. The first frame 31 is provided at a pair of diagonal positions inclined with respect to the angle of view of the liquid crystal panel 25b, and extends toward the outside. A pair of shaft members 31b and 31c and a lever member 31e extending upward from the upper center. And have.

  A pair of shaft members 31b and 31c extending from the main body 31a of the first frame 31 is supported by a second frame 32, which will be described later, as an elongated plate-like member. As shown in FIG. It is allowed to rotate around a rotation axis RA that is perpendicular to OA and inclined with respect to the angle of view. That is, the first frame 31, that is, the optical compensation element 10, can be inclined by an arbitrary angle within a certain range with respect to the liquid crystal panel 25b. The knob 31h provided at the tip of the lever member 31e is used when the tilt angle of the first frame 31 is finely adjusted by moving in the direction indicated by the arrow A (around the rotation axis RA) in FIG. The In addition, the base portion 31j of the lever member 31e constitutes a first fixing portion as a fixing portion.

  The optical compensation element 10 is a plate-like member made of an inorganic or organic material having birefringence, or a plate-like member made by combining these, on a transparent plate made of a polymer such as glass or plastic, with an adhesive, etc. A WV (Wide View) film or the like is attached. The optical compensation element 10 can arrange its optical axis in a direction parallel to the optical axis OA or in a direction perpendicular to the optical axis OA in accordance with the liquid crystal material sealed in the liquid crystal panel 25b and its alignment characteristics. . And when making the optical axis of the optical compensation element 10 into a direction parallel to the optical axis OA, the direction can be set to an appropriate angle with respect to the optical axis OA. Furthermore, when the optical axis of the optical compensation element 10 is set to a direction perpendicular to the optical axis OA, the direction can be set to an appropriate angle with respect to the rotation axis RA. In addition, as a material of the optical compensation element 10, various materials, such as sapphire, quartz, and TAC (triacetylcellulose), can be used.

  As shown in FIGS. 6 and 7, the second frame 32 is formed by processing a metal material (sheet metal), and has a main body portion 32a having a substantially rectangular plate shape. At the center of the main body 32a, there is an opening W2 that is opened in a substantially rectangular shape. The second frame 32 has side wall portions 32e and 32f formed by bending the left and right end portions of the main body portion 32a substantially vertically to the front side (in the direction of the liquid crystal panel 25b).

  Further, on the upper side of the main body portion 32a, there is a pair of protrusions 32b formed by being bent to the front side. The pair of projecting portions 32b constitutes a second fixing portion as a fixing portion. Further, on the upper side of the main body portion 32a, there is a pair of spring portions 32c formed to be folded back to the back side on the left and right sides of the pair of projecting portions 32b. The pair of spring portions 32c constitutes a first support portion as a support portion. In addition, above the opening W2 of the main body 32a, there is a pair of protrusions 32d formed to protrude in a hemispherical shape on the back side. The pair of projecting portions 32d constitutes a first engaging portion as an engaging portion.

  Insertion holes 53a and 53b are formed in the lower side walls 32e and 32f, and support grooves 53c and 53d, which are slit-like grooves, are formed in the upper end, and are formed at the lower ends of the insertion holes 53a and 53b. Are further formed with support grooves 54c and 54d which are slit-like grooves.

  Here, when the first frame 31 that supports the optical compensation element 10 is attached to the second frame 32, the support groove 53c of one side wall portion 32e of the second frame 32 has a structure as shown in FIGS. The shaft member 31b formed at the upper left of the front of the first frame 31 is fitted with a predetermined looseness, and the support groove 54d provided in the insertion hole 53b of the other side wall 32f is inserted into the front right of the first frame 31. The shaft member 31c formed below is fitted with the same looseness.

  At this time, the flange portion 61a formed at the end portion of the shaft member 31b and the flange portion 61b formed at the end portion of the shaft member 31c cooperate with each other in the lateral direction parallel to the main surface of the optical compensation element 10. Since the movement of the first frame 31 is limited with respect to, the backlash of the first frame 31 in the second frame 32 is reduced. That is, the first frame 31 can be smoothly rotated around the rotation axis RA in the second frame 32.

  The protrusions 32b and 32b of the second frame 32 function as spring parts that perform elastic locking, and are provided on the lower surfaces US and US of the protrusions 32b and 32b and the lever member 31e of the first frame 31. The upper ends TE and TE of the root portion 31j are in elastic contact with each other. Specifically, the lower surfaces US, US of the protrusions 32b, 32b elastically contact the upper ends TE, TE of the root portion 31j and urge downward. Thereby, the displacement of the root portion 31j, that is, the first frame 31 is limited by the frictional force, and as a result, the rotation of the first frame 31 around the rotation axis RA is limited.

  Here, the lever member 31e of the first frame 31 constitutes a first fixing portion, and the protrusion 32b of the second frame 32 constitutes a second fixing portion, and the first frame 31 with respect to the second frame 32. It functions as a fixed part that restricts the rotation of the. In other words, the fixed portion restricts displacement caused by the rotation of the pair of shaft members 31b and 31c by elastic contact between the first fixed portion and the second fixed portion.

  At this time, both sides of the lever member 31e are sandwiched between a pair of protrusions 32b and 32b that serve as rails. As a result, the posture of the first frame 31 is guided by the protrusions 32b and 32b and is stably held, and the posture of the first frame 31 and the optical compensation element 10 can be finely adjusted. Specifically, as shown in FIG. 5 (a), by moving the knob 31h of the lever member 31e in the front-rear direction (the direction indicated by the arrow A), the base portion 31j of the lever member 31e is moved between the protrusions 32b and 32b. It slides against the friction force on the lower surface US, US. For example, as shown in FIG. 5A, the state parallel to the liquid crystal panel 25b is changed to a state inclined with respect to the liquid crystal panel 25b as shown in FIG. Can be fixed in an inclined state. In addition, the figure shown in FIG.5 (b) is also rotating with respect to optical axis OA.

  3 to 5, after the adjustment of the optical compensation element 10, if the adhesive is supplied and fixed between the base portion 31j and the protrusions 32b and 32b, the first frame 31 is surely second. It can be fixed to the frame 32, and the positional relationship between the liquid crystal panel 25b and the optical compensation element 10 with respect to the rotation axis RA substantially perpendicular to the optical axis OA can be fixed permanently.

  As shown in FIGS. 5 and 6, the support holder 33 has a first joint portion 33 a for joining to the liquid crystal panel 25 b on one side, and a second for attaching the polarizing plate 25 f on the other side. A pair of side wall portions 33e and 33f are provided between the first joint portion 33a and the second joint portions 33b and 33c.

  The support holder 33 is formed by processing a metal material (sheet metal), and the joint portions (first joint portion 33a and second joint portions 33b and 33c) and the side wall portions 33e and 33f are three-dimensionally bent. A space SP (FIG. 3) that is formed and accommodates the second frame 32 in a state where the first frame 31 is supported between the first joint portion 33a and the second joint portions 33b and 33c. (See (a), FIG. 5 and FIG. 6). The first joint portion 33a has an opening W3 that is opened in a substantially rectangular shape at the center, and the optical compensation element 10 supported by the first frame 31 and the liquid crystal panel 25b face each other.

  As shown in FIG. 3A, FIG. 6, etc., the second joint portions 33b and 33c on the opposite side of the first joint portion 33a across the first frame 31 and the second frame 32 have an outer side, that is, a liquid crystal panel. A polarizing plate 25f is attached and fixed from the opposite side of 25b. As shown in FIG. 6 and the like, a plurality of attachment holes 62a are formed at appropriate positions in the second joint portions 33b and 33c, and a third frame 37 to be described later can be attached and fixed.

  Further, on the upper side of the second joint portions 33b and 33c, cutout portions 33g and 33h as concave portions formed substantially concentrically with the rotation center are formed, respectively. In this embodiment, the rotation center is set so as to substantially coincide with the optical axis OA. The notches 33g and 33h constitute a second engaging portion as an engaging portion.

Here, a procedure for attaching the second frame 32 in a state of supporting the first frame 31 to the support holder 33 will be described.
First, the gap is inserted into the space SP from above the support holder 33. When inserting, a pair of spring parts 32c and 32c of the 2nd frame 32 are inserted from the upper end part of 2nd junction part 33b, 33c so that both surfaces of 2nd junction part 33b, 33c may be clamped. Then, the insertion is continued and the protrusions 32d and 32d of the second frame 32 are engaged with the notches 33g and 33h of the support holder 33, whereby the attachment is completed.

  With the first frame 31 supported, the second frame 32 attached to the support holder 33 is rotatable with respect to the support holder 33. Specifically, the protrusions 32d and 32d of the second frame 32 are rotatable by sliding along the notches 33g and 33h while engaging the notches 33g and 33h of the support holder 33. Since the notches 33g and 33h are formed substantially concentrically with the rotation center (optical axis OA) as described above, the second frame 32 is rotatable about the optical axis OA.

  The spring portions 32 c and 32 c are configured as a second operation portion, and are used when finely adjusting the rotation angle of the second frame 32 (the optical compensation element 10) with respect to the support holder 33. And fine adjustment is performed by rotating the 2nd frame 32 with respect to the support holder 33 by moving the spring parts 32c and 32c to the left-right direction (direction shown by arrow B of Fig.5 (a)). .

  At this time, the pair of spring portions 32c and 32c as the first support portions are driven by the rotation of the second frame 32 with the second joint portions 33b and 33c as the second support portions sandwiched therebetween, respectively. 2 Slides against the frictional force on the surfaces of the joint portions 33b and 33c. As described above, the support portions (first support portion, second support portion) support the support holder 33 with a frictional force, so that the optical compensation by the rotation against the frictional force of the second frame 32 with respect to the support holder 33 is achieved. Fine adjustment of the displacement amount of the element 10 is allowed. Further, the frictional force of the support portion is set so that the second frame 32 can be fixed to the support holder 33 after the adjustment by the rotation.

  As shown in FIGS. 3 to 5, after adjusting the optical compensation element 10, if the adhesive is supplied and fixed between the spring portions 32 c and 32 c and the second joint portions 33 b and 33 c, the second frame 32 is fixed. The support holder 33 can be securely fixed, and the arrangement relationship between the liquid crystal panel 25b and the optical compensation element 10 can be fixed permanently.

  The third frame 37 is configured as a support member that supports and fixes the support holder 33 and the cross dichroic prism 27 as an optical member disposed on the exit side of the polarizing plate 25f. The third frame 37 is formed by processing a metal material (sheet metal), and includes a main body portion 37a having a substantially rectangular plate shape, and claw members 37b provided at four corners of the main body portion 37a and extending toward the liquid crystal panel 25b. have. The main body 37a has an opening W4 that is opened in a substantially rectangular shape at the center, and the polarizing plate 25f and the cross dichroic prism 27 shown in FIG. 2 face each other.

  The third frame 37 is fixed to the exit side of the support holder 33, and the exit filter unit 125b and the like are fixed to the cross dichroic prism 27 while keeping the polarizing plate 25f and the cross dichroic prism 27 apart from each other by a necessary amount. To do. Further, the third frame 37 can be accurately positioned by adjusting the position of the injection filter unit 125b to which the liquid crystal panel 25b is fixed by adjusting the position of the claw member 37b and the plurality of mounting holes 62a.

  Regarding the procedure for adjusting the mounting posture of the optical compensation element 10, in this embodiment, in the form of the optical unit 30 (see FIG. 2), the spring portion 32c is first operated in the left-right direction with respect to the support holder 33. By rotating the second frame 32, the optical compensation element 10 is rotated around the optical axis OA to adjust the mounting posture. Next, by operating the knob 31h of the first frame 31 in the front-rear direction and rotating the first frame 31, the optical compensation element 10 is rotated around the rotation axis RA to adjust the mounting posture. Yes. The procedure for adjusting the mounting posture may be reversed.

  The above is the description of the structure of the liquid crystal panel 25b for green light and the emission filter unit 125b, but the emission filter units 125a, 125c for each color light associated with the other liquid crystal panels 25a, 25c for blue light and red light. Has the same structure as the above-described injection filter unit 125b, and detailed description thereof is omitted.

  FIG. 8 is a view showing an emission filter unit and a first frame corresponding to two types of liquid crystal panels, and FIGS. 8A and 8B are front views showing the two types of liquid crystal panels and the emission filter unit. FIGS. 8C and 8D are front views showing two types of first frames corresponding to (a) and (b), respectively. The two types of liquid crystal panels (25b, 25a, 25c), the emission filter units (125b, 125a, 125c) corresponding to the two types of liquid crystal panels, and the first frame 31 will be described with reference to FIG.

  In the present embodiment, the liquid crystal panel 25b for green light and the liquid crystal panels 25a and 25c for blue light and red light have the same pretilt angle. This is because when the cross dichroic prism 27 is transmitted or reflected, the left / right inversion is compensated to match the viewing angle characteristics. For this reason, the optical axis and inclination of the optical compensation element 10 also need to be horizontally reversed between those associated with the liquid crystal panel 25b for green light and those associated with the liquid crystal panels 25a and 25c for blue light and red light. .

  Specifically, FIG. 8A shows a liquid crystal panel 25b for green light and an emission filter unit 125b. FIG. 8C shows the first frame 31 incorporated in the injection filter unit 125b. On the other hand, FIG. 8B shows the liquid crystal panels 25a and 25c for blue light and red light and the emission filter units 125a and 125c. FIG. 8D shows the first frame 31 incorporated in the emission filter units 125a and 125c.

  As is apparent from the figure, the first frame 31 in FIG. 8C and the first frame 31 in FIG. 8D have symmetrical shapes that are reversed left and right. That is, in the case of the first frame 31 in FIG. 8D, the shaft member 31b extends from the main body portion 31a to the upper right front side, the shaft member 31c extends from the main body portion 31a to the lower left front surface, and the lever member 31e extends upward from the upper center. Extend. As a result, the first frame 31 in FIG. 8C can be rotated around the rotation axis RA inclined upward to the left along the paper surface, and the first frame 31 in FIG. Rotating about a rotation axis RA ′ inclined upward to the right along the paper surface.

  In the above-described injection filter units 125a, 125b, and 125c, the second frame 32, the support holder 33, and the third frame 37 can be common parts, thereby reducing the cost. Also, the left and right protrusions of the lever member 31e have different lengths on the left and right, and the optical compensation element 10 can be easily checked by visually checking the lever member 31e even after the injection filter units 125a, 125b, and 125c are assembled. The inclination direction can be confirmed.

According to the embodiment described above, the following effects can be obtained.
(1) According to the compensation element adjustment mechanism of the present embodiment, the pair of shaft members 31 b and 31 c provided at positions where the first frame 31 supporting the optical compensation element 10 is opposed to the periphery of the optical compensation element 10. And the second frame 32 rotatably supports the pair of shaft members 31b and 31c, so that the mounting posture of the first frame 31, that is, the optical compensation element 10 can be adjusted with respect to the liquid crystal panel 25b. . Therefore, it is possible to adjust the mounting posture of the optical compensation element 10 when it is rotated around the rotation axis RA orthogonal to the optical axis OA. At this time, the fixing portion (the upper end TE of the base portion 31j formed on the first frame 31 as the first fixing portion and the protrusion 32b formed on the second frame 32 as the second fixing portion) is the second frame 32. Since the displacement due to the rotation of the pair of shaft members 31b and 31c with respect to is limited by elastic contact, the posture of the optical compensation element 10 can be changed with the first frame 31 by a desired amount and held as it is. Therefore, precise adjustment of the mounting posture of the optical compensation element 10 and simple fixing after the adjustment are possible.
In addition, the second frame is formed by the engaging portion (the projecting portion 32d formed on the second frame 32 as the first engaging portion and the notches 33g and 33h formed on the support holder 33 as the second engaging portion). By engaging 32 with the support holder 33 to make the second frame 32 pivotable, the mounting posture of the second frame 32, that is, the optical compensation element 10 can be adjusted with respect to the liquid crystal panel 25 b. Therefore, the mounting posture of the optical compensation element 10 when rotating around the optical axis OA can be adjusted. At this time, the support part (the spring part 32 c formed on the second frame 32 as the first support part, the second joint parts 33 b and 33 c as the second support part) supports the second frame 32 on the support holder 33. At the same time, since the displacement due to the rotation of the second frame 32 is limited by elastic contact, the posture of the optical compensation element 10 can be changed with the second frame 32 by a desired amount and held as it is. Therefore, precise adjustment of the mounting posture of the optical compensation element 10 and simple fixing after the adjustment are possible.
Therefore, the compensation element adjustment mechanism can adjust the mounting posture of the optical compensation element 10 when it is rotated around the rotation axis RA orthogonal to the optical axis OA, and is also rotated around the optical axis OA. The mounting posture of the optical compensation element 10 can also be adjusted, and precise adjustment of the mounting posture of the optical compensation element 10 and simple fixing after the adjustment are possible.

  (2) According to the compensation element adjustment mechanism of the present embodiment, according to the compensation element adjustment mechanism of the present embodiment, the engagement portion includes the protrusion 32d as the first engagement portion on the second frame 32 and the support holder 33. Have notches 33g and 33h as second engaging portions. The notches 33g and 33h as the second engaging portions are formed as concave portions formed substantially concentrically with the optical axis OA, with the rotation center being substantially coincident with the optical axis OA. The protrusion 32d as a portion is engaged with the notches 33g and 33h and slid. Thereby, the posture can be adjusted by rotating the optical compensation element 10 substantially concentrically with respect to the optical axis OA.

  (3) According to the compensation element adjustment mechanism of the present embodiment, the spring portion 32 c formed on the second frame 32 as the first support portion is the second joint portion as the second support portion formed on the support holder 33. By locking 33b and 33c with a frictional force, fine adjustment of the displacement amount by the rotation of the second frame 32 with respect to the support holder 33 is allowed. Therefore, the optical compensation element 10 can be fixed (supported) by the frictional force in a state where the posture of the optical compensation element 10 is finely adjusted against the frictional force.

  (4) According to the compensation element adjusting mechanism of the present embodiment, the support portion includes the second frame 32 as the first support portion and the support holder 33 as the second support portion 33b as the second support portion. 33c, and supports the second frame 32 on the support holder 33, and slides by following the rotation of the second frame 32. Accordingly, the second frame 32 supported by the support holder 33 can be stably rotated and fixed, and the adjustment and fixing of the mounting posture of the optical compensation element 10 can be performed stably.

  (5) According to the compensation element adjustment mechanism of the present embodiment, the spring portion 32c as the first support portion sandwiches and supports the second joint portions 33b and 33c as the second support portion, and thus is a simple mechanism. It is possible to limit or fix the displacement of the second frame 32.

  (6) According to the compensation element adjustment mechanism of the present embodiment, the first frame 31 has the lever member 31e as the first operation portion that rotates with respect to the second frame 32. Therefore, the lever member 31e. By rotating the first frame 31 that supports the optical compensation element 10 with respect to the second frame 32 using the above, it is possible to easily adjust the attitude of the optical compensation element 10.

  (7) According to the compensation element adjustment mechanism of the present embodiment, the second frame 32 has the spring portion 32c as the second operation portion that rotates with respect to the support holder 33. By using the second frame 32 that supports the first frame 31 to rotate with respect to the support holder 33, the posture adjustment of the optical compensation element 10 can be easily performed.

  (8) According to the compensation element adjustment mechanism of the present embodiment, the protrusion 32b formed on the second frame 32 serving as the second fixing portion is formed on the root portion 31j formed on the first frame 31 serving as the first fixing portion. By locking the upper end TE with a frictional force, fine adjustment of the displacement amount by the rotation of the first frame 31 with respect to the second frame 32 is allowed. Thereby, the posture of the optical compensation element 10 can be fixed by the frictional force in a state where the posture is finely adjusted against the frictional force.

  (9) According to the compensation element adjusting mechanism of the present embodiment, the protrusion 32b formed on the second frame 32 as the second fixing portion is the root portion 31j formed on the first frame 31 as the first fixing portion. The displacement of the first frame 31 relative to the second frame 32 is limited by elastic locking of the upper end TE. As a result, the mounting posture of the optical compensation element 10 can be simply fixed.

  (10) According to the compensation element adjustment mechanism of the present embodiment, since the protrusion 32b formed on the second frame 32 as the second fixing portion is formed as a sheet metal spring, the first frame 31 can be formed with a simple mechanism. Displacement restriction or fixation becomes possible.

  (11) According to the compensation element adjustment mechanism of the present embodiment, the pair of shaft members 31b and 31c are arranged in a direction inclined with respect to the vertical and horizontal directions of the screen of the liquid crystal panel 25b. Therefore, the optical compensation element 10 can be rotated and tilted about an axis (rotation axis RA orthogonal to the optical axis OA) inclined with respect to the angle of view.

  (12) According to the compensation element adjusting mechanism of the present embodiment, the pair of shaft members 31b and 31c are elongated plate-like shapes supported respectively by slit-like grooves (support grooves 53c and 54d) formed in the second frame 32. Therefore, the smooth posture adjustment of the first frame 31, that is, the smooth posture adjustment of the optical compensation element 10 can be performed.

  (13) According to the compensation element adjusting mechanism of the present embodiment, the support holder 33 has the first joint portion 33a for joining the liquid crystal panel 25b on one side and the second joint for attaching the polarizing plate 25f to the other side. In addition to the portions 33b and 33c, a gap-shaped space SP is provided between the first joint portion 33a and the second joint portions 33b and 33c to accommodate the first frame 31 and the second frame 32. With such a support holder 33, the first frame 31 and the second frame 32 can be accommodated in the gap-shaped space SP, and the liquid crystal panel 25b and the polarizing plate 25f can be fixed together, and an optical compensation element between them. 10 postures can be adjusted.

  (14) According to the compensation element adjustment mechanism of the present embodiment, the polarizing plate 25f is disposed on the exit side of the liquid crystal panel 25b, the support holder 33, and the cross dichroic prism 27 disposed on the exit side of the polarizing plate 25f. The third frame 37 is supported and fixed. As a result, the fixing position of the emission filter unit 125 b can be adjusted and fixed to the cross dichroic prism 27 via the third frame 37.

  (15) According to the projector 100 of the present embodiment, a light beam is emitted by the light emission of the light source device 21 (light source lamp 21a), and the light beam emitted from the light source device 21 by the light modulation device having the liquid crystal panel 25b is image information. And an optical image is formed by modulation. Then, the optical image formed by the light modulation device is projected by the projection optical device (projection lens 29). At this time, since the compensation element adjustment mechanism having a simple structure according to this embodiment is used, the optical compensation element 10 can be precisely arranged with a simple structure, and the contrast of the projected optical image (color image or the like). Can be easily increased.

  In addition, it is not limited to embodiment mentioned above, It is possible to add and implement various changes, improvements, etc. A modification will be described below.

  (Modification 1) In the above-described embodiment, the engaging portion includes the protrusion 32d as the first engaging portion on the second frame 32 and the concave portion (the notch portion 33g, the second engaging portion on the support holder 33). 33h). However, the present invention is not limited to this, and the engaging portion may have a concave portion as the first engaging portion in the second frame 32 and a protruding portion as the second engaging portion in the support holder 33.

  (Modification 2) In the embodiment described above, the spring portion 32c formed on the second frame 32 as the first support portion includes the second joint portions 33b and 33c as the second support portion formed on the support holder 33. By locking with the frictional force, fine adjustment of the displacement amount by the rotation of the second frame 32 relative to the support holder 33 is allowed. However, the present invention is not limited to this, and the amount of displacement due to the rotation of the second frame 32 relative to the support holder 33 by forming a spring portion or the like as the second support portion on the support holder 33 and locking the second frame 32 with frictional force. May be allowed to be finely adjusted.

  (Modification 3) In this embodiment, the spring part 32c of the 2nd frame 32 is used as a 2nd operation part. However, the present invention is not limited to this, and the second operation unit may be the protrusion 32b of the second frame 32. In this case, the lever member 31e as the first operation unit is rotated in the left-right direction with respect to the optical axis OA. As a result, the protrusion 32b sandwiching the lever member 31e may be driven and rotated in the left-right direction to rotate the optical compensation element 10 around the optical axis OA.

  (Modification 4) In the embodiment described above, the pair of shaft members 31b and 31c are elongated plate-like members, but are not limited thereto, and may be rod-like members.

  (Modification 5) In the above embodiment, the projector 100 using the three liquid crystal panels 25a, 25b, and 25c as the light modulation device has been described. However, the present invention is not limited to this. For example, the invention can be applied to a projector using only one liquid crystal panel, a projector using two liquid crystal panels, or a projector using four or more liquid crystal panels.

  (Modification 6) In the above-described embodiment, the optical compensation element 10 for improving contrast is incorporated, for example, between the polarizing plates 25e, 25f, 25g on the exit side and the liquid crystal panels 25a, 25b, 25c. The element 10 can be incorporated between the polarizing plates 25e, 25f, and 25g on the incident side and the liquid crystal panels 25a, 25b, and 25c. In this case, an incident filter unit having the same structure as the emission filter units 125a, 125b, and 125c shown in FIG. 2 may be provided on the incident side of each of the liquid crystal panels 25a, 25b, and 25c.

  (Modification 7) In the embodiment described above, the rotation axis RA for rotating the first frame 31 is arranged in a direction inclined approximately 45 degrees with respect to the vertical and horizontal directions of the screens of the liquid crystal panels 25a, 25b, and 25c. Yes. However, the present invention is not limited to this, and the angle of the rotation axis RA can be arbitrarily set within a plane perpendicular to the optical axis OA.

  (Modification 8) Although the transmissive liquid crystal panels 25a, 25b, and 25c are used in the embodiment, it is also possible to use a reflective light modulation device such as a reflective liquid crystal panel. In this case, since a single polarizing plate is disposed only on one side of the reflective liquid crystal panel, for example, an emission of a type in which the optical compensation element 10 is disposed between each reflective liquid crystal panel and the single polarizing plate. The filter unit can be disposed on the front side of each reflective liquid crystal panel.

  (Modification 9) In the above embodiment, a discharge lamp is used as the light source lamp 21a constituting the light source device 21. However, the present invention is not limited to this, and the light source device may be an LED (Light Emitting Diode) element or an LD (Laser Diode). ) An element or the like can be used.

  (Modification 10) Although the projector 100 of the above embodiment is applied as a front type projector, it can also be applied to a rear type projector that integrally has a screen as a projection target surface.

FIG. 2 is a diagram showing a structure of an optical system of a projector according to the present embodiment. The perspective view which shows the structure of the optical unit which comprises some projectors. It is a figure which shows the structure of the injection | emission filter unit which has a compensation element adjustment mechanism, and a liquid crystal panel, (a) is a top view, (b) is the transparent front view. It is a figure which shows the structure of the injection | emission filter unit in FIG. 3, (a) is the transparent front view, (b) is a right view. It is a perspective view of an injection filter unit, (a) is a perspective view showing a state before adjustment, and (b) is a perspective view showing a state after adjustment. The exploded perspective view of an injection filter unit etc. It is a figure which shows the structure of a 2nd frame, (a) is a front view, (b) is a right view. It is a figure which shows the injection filter unit and 1st frame corresponding to two types of liquid crystal panels, (a), (b) is a front view which shows two types of liquid crystal panels and an injection filter unit, (c), (D) is a front view showing two types of first frames respectively corresponding to (a) and (b).

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Optical compensation element, 25a, 25b, 25c ... Liquid crystal panel, 25e, 25f, 25g ... Polarizing plate, 30 ... Optical unit, 31 ... 1st frame, 31a ... Main-body part, 31b, 31c ... Shaft member, 31e ... Lever 31h ... Knob, 31j ... Root part, 32 ... Second frame, 32a ... Main body part, 32b ... Projection part, 32c ... Spring part, 32d ... Projection part, 33 ... Support holder, 33a ... First joint part, 33b 33c, second joint, 33g, 33h, notch, 37, third frame, 53c, 54d, support groove, 100, projector, 125a, 125b, 125c, injection filter unit, OA, optical axis, RA,. Rotating shaft, SP ... space, W1, W2, W3, W4 ... opening.

Claims (12)

An optical compensation element disposed between the liquid crystal panel and the polarizing plate;
A first frame that supports the optical compensation element and has a pair of shaft members provided at opposing positions around the optical compensation element;
A second frame that rotatably supports the pair of shaft members of the first frame;
A support holder fixed to the liquid crystal panel side and rotatably supporting the second frame;
A fixing portion that restricts displacement due to rotation of the pair of shaft members by elastic contact;
An engagement part for engaging the second frame with the support holder to make the second frame rotatable;
A compensation element adjusting mechanism, comprising: a support portion that supports the second frame on the support holder and restricts displacement due to rotation of the second frame by elastic contact. The compensation element adjustment mechanism according to claim 1,
The engaging portion includes a first engaging portion on the second frame, and a second engaging portion on the support holder,
A compensation element adjustment mechanism, wherein the second frame is rotatable with respect to the support holder by the engagement of the first engagement portion and the second engagement portion. The compensation element adjustment mechanism according to claim 2,
Of the first engaging portion and the second engaging portion, one engaging portion has a protrusion, and the other engaging portion has a recess formed substantially concentrically with the rotation center. And a projecting portion engaging with the recess and sliding. The compensation element adjustment mechanism according to any one of claims 1 to 3,
The support element allows fine adjustment of a displacement amount by rotation of the second frame with respect to the support holder by locking the second frame or the support holder with a frictional force. Adjustment mechanism. The compensation element adjustment mechanism according to claim 4,
The support portion includes a first support portion on the second frame, and a second support portion on the support holder,
The compensation element adjustment mechanism characterized in that the first support part and the second support part support the second frame on the support holder and slide along the rotation of the second frame. . The compensation element adjustment mechanism according to claim 5,
The compensation element adjustment mechanism according to claim 1, wherein the first support part includes a spring part that sandwiches and supports the second support part. A compensation element adjustment mechanism according to any one of claims 1 to 6,
The compensation element adjustment mechanism according to claim 1, wherein the first frame includes a first operation unit that rotates with respect to the second frame. A compensation element adjustment mechanism according to any one of claims 1 to 7,
The compensation element adjustment mechanism according to claim 1, wherein the second frame has a second operation portion that rotates with respect to the support holder. A compensation element adjustment mechanism according to any one of claims 1 to 8,
The fixing portion allows fine adjustment of a displacement amount by rotation of the first frame with respect to the second frame by locking the first frame or the second frame with a frictional force. Compensation element adjustment mechanism. The compensation element adjustment mechanism according to claim 9,
The fixing portion includes a first fixing portion on the first frame and a second fixing portion on the second frame,
A compensation element adjustment mechanism, wherein the displacement of the first frame relative to the second frame is limited by elastic locking of the first fixing portion and the second fixing portion. The compensation element adjustment mechanism according to claim 10,
The compensation element adjusting mechanism, wherein the first fixing part or the second fixing part has a spring part that performs the elastic locking. Compensating element adjustment mechanism according to any one of claims 1 to 11,
A light source device that emits a luminous flux by light emission;
A light modulation device having the liquid crystal panel that modulates the light beam emitted from the light source device according to image information to form an optical image;
And a projection optical device that projects the optical image formed by the light modulation device.

Images