JP6493056B2 - Image projection device - Google Patents

Description

  The present invention relates to an image projection apparatus.

  Based on image data transmitted from a personal computer, a digital camera or the like, an image projection apparatus (image projection apparatus) that generates an image using light emitted from a light source and projects the generated image onto a screen or the like through an optical system including a lens A projector is typically known. In order to facilitate adjustment at the time of installation of such an image projection apparatus, a relative relationship between a light modulation element that modulates light from a light source based on an image signal and a projection optical system that projects light transmitted through the light modulation element A technique for changing the position is known.

  For example, Patent Document 1 discloses a technique for increasing the number of pixels of a projected image and increasing the resolution by displacing the position of the light modulation element by, for example, a half pixel in a short cycle. Further, a technique for changing the position of the image sensor is disclosed.

  Here, in order to cool the light modulation element, it is necessary to have a configuration including a cooling member such as a heat sink. However, the cooling member is heavier than the light modulation element, and when the position of the light modulation element is displaced by moving the light modulation element and the cooling member, it is difficult to move the light modulation element with high accuracy. In particular, when the light modulation element is displaced in the vertical direction, there is a problem that the light modulation element cannot be accurately displaced due to the weight of the cooling member. That is, conventionally, it has been difficult to stably displace the modulation element.

  In order to solve the above-described problems and achieve the object, the present invention includes a light modulation element that receives light emitted from a light source on an image generation surface and generates an image using the received light, and the light modulation A cooling member that cools the element; an image generating unit that includes: an illumination optical unit that guides light emitted from the light source to the light modulation element; and a projection unit that projects an image generated by the light modulation element; A plurality of driving surfaces on which a driving force for moving the image generating unit is applied to the image generating unit, and the image generating unit is relative to the illumination optical unit along the plurality of driving surfaces. An image projecting device comprising:

  According to the present invention, it is possible to stably displace the light modulation element.

FIG. 1 is a diagram illustrating an image projection apparatus according to this embodiment. FIG. 2 is a block diagram illustrating a functional configuration of the image projection apparatus according to this embodiment. FIG. 3 is a perspective view illustrating the optical engine in the present embodiment. FIG. 4 is a schematic diagram showing an example of a cross section of the optical engine in the present embodiment. FIG. 5 is a perspective view illustrating an optical engine in the present embodiment. FIG. 6 is a perspective view illustrating an image display unit in this embodiment. FIG. 7 is a perspective view illustrating a fixing member in the present embodiment. FIG. 8 is an exploded perspective view illustrating the fixing member in the present embodiment. FIG. 9 is an explanatory diagram of the support structure for the movable plate in the present embodiment. FIG. 10 is a partially enlarged view illustrating a schematic configuration of the portion A shown in FIG. FIG. 11 is a plan view illustrating a top plate in the present embodiment. FIG. 12 is a perspective view illustrating a movable unit in the present embodiment. FIG. 13 is an explanatory diagram of an example of a driving surface on which a driving force is formed, which is formed by the driving unit. FIG. 14 is a plan view illustrating a top plate in the present embodiment. FIG. 15 is an exploded perspective view illustrating the movable unit in the present embodiment. FIG. 16 is an explanatory diagram of movement of the image generation unit. FIG. 17 is an explanatory diagram of an example of a drive surface formed by the drive unit.

  Hereinafter, embodiments for carrying out the invention will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and redundant description may be omitted.

  FIG. 1 is a diagram illustrating an image projection apparatus 1 according to the present embodiment. FIG. 1A is a perspective view of the image projection apparatus 1, and FIG. 1B is a side view of the image projection apparatus 1.

  The image projection apparatus 1 includes an exit window 3, an external I / F 9, and an intake port 2 that sucks outside air, and an optical engine that generates a projection image is provided therein. The image projection apparatus 1 receives image data from, for example, a personal computer or a digital camera connected to the external I / F 9. Then, the optical engine of the image projector 1 generates an image (hereinafter sometimes referred to as a projected image) based on the received image data, and the image is output from the exit window 3 to the screen S as shown in FIG. Project.

  In the drawings shown below, the Y direction is the width direction of the image projection apparatus 1, the X direction is the depth direction of the image projection apparatus 1, and the Z direction is the height direction of the image projection apparatus 1. In the present embodiment, the image projection apparatus 1 will be described assuming that the XY plane is a horizontal plane and the Z direction is the vertical direction (the direction of gravity).

  FIG. 2 is a block diagram illustrating a functional configuration of the image projection apparatus 1 according to the present embodiment.

  As shown in FIG. 2, the image projection apparatus 1 includes a power source 4, a main switch (SW) 5, an operation unit 7, an external I / F 9, a system control unit 10, a fan 20, and an optical engine 15. And having.

  The power source 4 is connected to a commercial power source, converts voltage and frequency for the internal circuit of the image projection apparatus 1, and supplies power to the system control unit 10, the fan 20, the optical engine 15, and the like.

  SW5 is used for ON / OFF operation of the image projection apparatus 1 by the user. When the power source 4 is connected to a commercial power source via a power cord or the like and the SW 5 is turned on, the power source 4 starts to supply power to each part of the image projection apparatus 1 and the SW 5 is turned off. Then, the power source 4 stops the power supply to each part of the image projection apparatus 1.

  The operation unit 7 is a button or the like for receiving various operations by the user, and is provided on the housing of the image projection apparatus 1, for example. The operation unit 7 accepts user operations such as the size, color tone, and focus adjustment of the projected image. The user operation accepted by the operation unit 7 is sent to the system control unit 10.

  The fan 20 rotates under the control of the system control unit 10 and cools the light source 30 of the optical engine 15 by the air sucked from the air inlet 2.

  The external I / F 9 has a connection terminal connected to, for example, a personal computer or a digital camera, and outputs image data transmitted from the connected device to the system control unit 10.

  The optical engine 15 includes a light source 30, an illumination optical unit 40, an image display unit 50, a projection unit 60, and a drive unit 82. The optical engine 15 projects an image on the screen S under the control of the system control unit 10.

  The light source 30 is, for example, a mercury high pressure lamp, a xenon lamp, an LED, or the like. The light source 30 is controlled by the system control unit 10 to irradiate the illumination optical unit 40 with light.

  The illumination optical unit 40 is an example of illumination optical means. The illumination optical unit 40 guides the light emitted from the light source 30 to the DMD 551 (detailed later) of the image display unit 50. The illumination optical unit 40 includes, for example, a color wheel, a light tunnel, a relay lens, and the like. The light emitted from the light source 30 is guided to the DMD 551 by the illumination optical unit 40.

  The image display unit 50 includes a fixed unit 51, a movable unit 55, and a drive unit 82.

  The movable unit 55 is provided so as to be movable with respect to the illumination optical unit 40. The movable unit 55 includes an image generation unit 560 and a movable member 550. The image generation unit 560 corresponds to an image generation unit.

  The image generation unit 560 includes a digital micromirror device (DMD: Digital Micromirror Device (hereinafter simply referred to as “DMD”)) 551 and a heat sink 554.

  The DMD 551 is an example of a light modulation element. The DMD 551 generates an image using light emitted from the light source 30.

  The DMD 551 has an image generation surface on which a plurality of movable micromirrors are arranged in a grid pattern. The DMD 551 has a substantially rectangular image generation surface composed of a plurality of micromirrors. Each micromirror of the DMD 551 is provided so that the mirror surface can tilt around the torsion axis, and is driven ON / OFF based on an image signal transmitted from the system control unit 10.

  For example, when the micromirror is “ON”, the inclination angle is controlled so that the light from the light source 30 is reflected to the projection unit 60. When the micromirror is “OFF”, for example, the inclination angle is controlled in a direction in which light from the light source 30 is reflected toward an OFF light plate (not shown).

  As described above, the DMD 551 controls the inclination angle of each micromirror by the image signal transmitted from the system control unit 10, modulates the light emitted from the light source 30 and passed through the illumination optical unit 40, and generates a projection image. To do. In other words, the DMD 551 can control the projection of light for each pixel by driving each micromirror individually. That is, the DMD 551 receives light emitted from the light source 30 on the image generation surface and generates an image using the received light.

  The heat sink 554 is an example of a cooling member. The heat sink 554 cools the DMD 551. The heat sink 554 suppresses the temperature rise of the DMD 551 and reduces the occurrence of malfunctions such as malfunction and failure due to the temperature rise of the DMD 551. The heat sink 554 and the DMD 551 are thermally connected. For example, the DMD 551 and the heat sink 554 may be disposed in contact with each other, or may be disposed in contact via a thermally conductive member having thermal conductivity. In the present embodiment, the heat sink 554 is disposed in contact with the surface of the DMD 551 opposite to the image generation surface via a heat conductive sheet. Further, the DMD 551 and the heat sink 554 are arranged in the X direction.

  The movable member 550 supports the image generation unit 560 (that is, the DMD 551 and the heat sink 554) so as to be movable with respect to the illumination optical unit 40. The movable member 550 is a flat plate member. The image display unit 50 includes a plurality of movable members 550. The movable member 550 is disposed at different positions outside the image generation unit 560, and supports the image generation unit 560 so as to be movable with respect to the illumination optical unit 40. A specific configuration of the movable member 550 will be described later.

  The fixed unit 51 supports the movable unit 55 so as to be movable with respect to the illumination optical unit 40. The fixing unit 51 includes a fixing member 510. The fixing member 510 is a flat plate member. The image display unit 50 includes a plurality of fixing members 510. Each of the plurality of fixed members 510 is provided corresponding to each of the plurality of movable members 550 and is disposed to face each of the plurality of movable members 550. And the fixed member 510 supports the movable member 550 arrange | positioned facing so that a movement is possible.

  Therefore, the image generation unit 560 (DMD 551 and heat sink 554) supported by the movable member 550 is supported by the fixed member 510 of the fixed unit 51, and is supported by the fixed member 510 so as to be movable with respect to the illumination optical unit 40. The

  The driving unit 82 forms a plurality of driving surfaces on which the driving force for moving the image generating unit 560 is applied to the image generating unit 560. For example, the drive unit 82 forms a plurality of drive surfaces that are parallel to each other via the image generation unit 560 or intersect with each other via the image generation unit 560. Then, the drive unit 82 moves the image generation unit 560 relative to the illumination optical unit 40 along the formed drive surface.

  In the present embodiment, drive unit 82 forms a drive surface on the surface of movable member 550 that faces fixed member 510. For example, the driving unit 82 forms at least a pair of driving surfaces that are parallel to the image forming surface (ZY plane) of the DMD 551 and that face each other via the image generating unit 560 with respect to the image generating unit 560.

  Then, the drive unit 82 moves (displaces) the movable member 550 with respect to the fixed member 510 along the formed drive surface, whereby the image generation unit 560 (DMD 551, heat sink 554) supported by the movable member 550. Is moved (displaced) with respect to the illumination optical unit 40.

  The movement (displacement) along the driving surface refers to rotation along the driving surface, movement in a predetermined direction on the driving surface, or movement in a direction opposite to the one direction on the driving surface, etc. Means.

  The drive part 82 should just be the structure which can implement | achieve the said drive. The detailed configuration of the drive unit 82 will be described later.

  The projection unit 60 is an example of a projection unit. The projection unit 60 projects the image generated by the DMD 551 onto the screen S. For example, the projection unit 60 has a plurality of projection lenses, mirrors, etc., and enlarges and projects the image generated by the DMD 551 onto the screen S.

  The system control unit 10 controls each unit provided in the image projection apparatus 1. The system control unit 10 includes an image control unit 11 and a movement control unit 12. For convenience of explanation, the functions according to the present invention are mainly illustrated here, but the functions of the system control unit 10 are not limited to these. In the present embodiment, the system control unit 10 includes, for example, a CPU, a ROM, a RAM, and the like. The CPU executes a program stored in the ROM in cooperation with the RAM, whereby each unit of the system control unit 10 is executed. Functions (image control unit 11 and movement control unit 12) are realized. For example, at least a part of the functions (image control unit 11 and movement control unit 12) of each unit of the system control unit 10 is realized by a dedicated hardware circuit (semiconductor integrated circuit or the like). It may be.

  The program executed by the system control unit 10 according to the present embodiment is a file in an installable or executable format, and is a CD-ROM, flexible disk (FD), CD-R, DVD (Digital Versatile Disk). It may be configured to be recorded and provided on a computer-readable recording medium such as USB (Universal Serial Bus), or may be configured to be provided or distributed via a network such as the Internet. Further, various programs may be provided by being incorporated in advance in a nonvolatile recording medium such as a ROM.

  The image control unit 11 controls the DMD 551 so as to generate an image to be projected onto the screen S based on image data input from the external I / F 9. Specifically, the image control unit 11 controls ON / OFF driving of each micromirror of the DMD 551 based on an image signal generated from image data. Accordingly, the image control unit 11 controls the DMD 551 so as to generate an image to be projected on the screen S.

  The movement control unit 12 controls the movement of the image generation unit 560 relative to the illumination optical unit 40. Specifically, the movement control unit 12 moves (displaces) the movable member 550 relative to the fixed member 510 by controlling the drive unit 82. Accordingly, the movement control unit 12 controls the driving unit 82 so that the image generation unit 560 (DMD 551, heat sink 554) supported by the movable member 550 is moved (displaced) with respect to the illumination optical unit 40.

  Next, the configuration of each part of the optical engine 15 will be described.

  FIG. 3 is a perspective view illustrating the optical engine 15 in the present embodiment. FIG. 3A is a perspective view illustrating an example of a state in which the housing of the image projector 1 is removed. FIG. 3B is a perspective view showing an example of a portion of the optical engine 15.

  The optical engine 15 includes a light source 30, an illumination optical unit 40, an image display unit 50, and a projection unit 60.

  The light source 30 irradiates the illumination optical unit 40 with light. The illumination optical unit 40 guides the light emitted from the light source 30 to the DMD 551 of the image display unit 50. In the present embodiment, DMD 551 is arranged so that the image generation plane of DMD 551 and the ZY plane coincide. That is, in the present embodiment, the DMD 551 is arranged so that the image generation surface of the DMD 551 coincides with a plane (ZY plane) orthogonal to the horizontal plane. Further, the DMD 551 is arranged so that the image generation surface of the DMD 551 coincides with the vertical direction (Z direction, direction of gravity).

  The projection unit 60 projects the image generated by the DMD 551 provided in the image display unit 50 to the outside of the image projection apparatus 1.

  FIG. 4 is a schematic diagram showing an example of an XY cross section of the optical engine 15 in the present embodiment.

  The illumination optical unit 40 includes a color wheel 40A, a light tunnel 40B, a relay lens 40C, a plane mirror 40D, and a concave mirror 40E.

  The color wheel 40A is, for example, a disk-shaped member in which filters of each color of R (red), G (green), and B (blue) are provided at different portions in the circumferential direction. The color wheel 40A rotates at a high speed to convert the light emitted from the light source 30 into RGB colors. The light converted into RGB colors by the color wheel 40A reaches the light tunnel 40B.

  The light tunnel 40B is a cylindrical optical component for making the luminance distribution of light emitted from the light source 30 uniform. More specifically, the light tunnel 40B is a rectangular cylindrical optical component in which a plate glass is bonded to the inner surface. The light tunnel 40B uniformizes the luminance distribution by multiplely reflecting the light of each color of RGB transmitted through the color wheel 40A on the inner surface, and guides it to the relay lens 40C.

  The relay lens 40C collects light on the plane mirror 40D while correcting axial chromatic aberration of light emitted from the light tunnel 40B. The plane mirror 40D reflects the collected light to the concave mirror 40E. The concave mirror 40E expands the light reflected by the flat mirror 40D and guides it to the image generation surface of the DMD 551.

  For this reason, the light emitted from the light source 30 is magnified by the illumination optical unit 40 and guided to the DMD 551. In other words, an image formed by the light guided to the DMD 551 (an image having a size substantially equal to that of the DMD 551) is an image formed by the light emitted from the light tunnel 40B (substantially the cross section on the light emitting side of the light tunnel 40B). An image of an equivalent size) is enlarged by a predetermined magnification (determined according to the optical system of the illumination optical unit 40).

  The DMD 551 modulates the reflected light from the concave mirror 40E and generates an image for projection. The image generated by the DMD 551 is projected to the outside by the projection unit 60.

  The projection unit 60 includes, for example, a projection lens, a folding mirror, and a curved mirror. The projection lens has a plurality of lenses, and forms an image generated by the DMD 551 on the folding mirror. The folding mirror and the curved mirror reflect the image formed so as to be enlarged, and project it onto the screen S or the like outside the image projector 1.

  Note that at least the light incident side of the relay lens 40C, the flat mirror 40D, the concave mirror 40E, the DMD 551, and the projection unit 60 is held by a housing that covers each component. It is preferable that the mating surfaces of the housing have a dustproof structure sealed with a sealing material.

  FIG. 5 is a perspective view illustrating the optical engine 15 in the present embodiment. FIG. 6 is a perspective view illustrating the image display unit 50 in the present embodiment.

  The image display unit 50 provided in the optical engine 15 includes a movable unit 55 and a fixed unit 51 that supports the movable unit 55. The fixed unit 51 has a fixed position with respect to the illumination optical unit 40 and supports the movable unit 55.

  The fixing unit 51 includes a plurality of fixing members 510. The movable unit 55 includes a plurality of movable members 550.

  The fixed member 510 is disposed so as to face each of the plurality of movable members 550, and supports each of the plurality of movable members 550 so as to be movable. That is, the fixed member 510 supports the DMD 551 and the heat sink 554 supported by the movable member 550 via the movable member 550 so as to be movable with respect to the illumination optical unit 40.

  In the present embodiment, an example in which the image display unit 50 (movable unit 55) includes a plurality of fixing members 510 and a fixing member 51A and a fixing member 51B will be described.

  The fixing member 51 </ b> A and the fixing member 51 </ b> B are arranged so that their plate surfaces are parallel to each other via the image generation unit 560 (DMD 551 and heat sink 554). The fixing member 51A, the fixing member 51B, and the image generation surface of the DMD 551 are arranged in the X direction so as to be parallel to each other. That is, the fixing member 51A and the fixing member 51B are arranged to face each other so as to sandwich the image generation unit 560 from both sides in the X direction (that is, the normal direction of the image display surface of the DMD 551).

  In the present embodiment, fixing member 51A is arranged to face the image generation surface of DMD 551 in image generation unit 560. On the other hand, the fixing member 51 </ b> B is disposed so as to face the opposite surface of the DMD 551 in the heat sink 554 provided in the image generation unit 560.

  Each of the fixing member 51 </ b> A and the fixing member 51 </ b> B is connected to the housing 11 of the image projection device 1 via the support member 100 at one end in the Z direction. For this reason, the fixing member 51 </ b> A and the fixing member 51 </ b> B are in a state where their positions relative to the illumination optical unit 40 are fixed.

  The fixing member 51 </ b> A includes a top plate 511 and a base plate 512. The top plate 511 and the base plate 512 are plate-like members arranged so that the plate surfaces are parallel to the ZY plane (that is, the image generation surface of the DMD 551). The top plate 511 and the base plate 512 are provided in parallel in the X direction with a predetermined gap, and are fixed to the housing 11.

  On the other hand, the fixing member 51 </ b> B includes a top plate 571 and a base plate 572. The top plate 571 and the base plate 572 are plate-like members arranged so that the plate surfaces are parallel to the ZY plane (that is, the image generation surface of the DMD 551). The top plate 571 and the base plate 572 are provided in parallel in the X direction with a predetermined gap, and are fixed to the housing 11.

  The movable unit 55 includes a DMD 551, a heat sink 554, and a plurality of movable members 550. The movable member 550 supports the DMD 551 and the heat sink 554 so as to be movable with respect to the illumination optical unit 40. The movable member 550 is a flat plate member.

  In the present embodiment, the case where the image display unit 50 (movable unit 55) includes a movable member 55A and a movable member 55B as a plurality of movable members 550 will be described as an example.

  The movable member 55A and the movable member 55B are arranged so that their plate surfaces are parallel to each other via the image generation unit 560 (DMD 551 and heat sink 554). The movable member 55A, the movable member 55B, and the image generation surface of the DMD 551 are arranged in the X direction so as to be parallel to each other.

  Further, in the present embodiment, the movable member 55A is disposed so as to face the image generation surface of the DMD 551 in the image generation unit 560, and holds the DMD 551 from the image generation surface side. On the other hand, the movable member 55 </ b> B is arranged so as to face the opposite surface of the DMD 551 in the heat sink 554 provided in the image generation unit 560, and holds the heat sink 554.

  That is, in the image generation unit 560, the image generation surface side of the DMD 551 is supported by the movable member 55A, and the surface of the heat sink 554 facing the DMD 551 is supported by the movable member 55B.

  For this reason, the movable member 55A and the movable member 55B are disposed to face each other so as to sandwich the image generation unit 560 (DMD 551, heat sink 554) from both sides in the X direction (normal direction of the image display surface).

  The movable member 55A is movably supported by the fixed member 51A. The movable member 55B is supported by the fixed member 51B so as to be movable.

  Specifically, the movable member 55 </ b> A includes a movable plate 552 and a coupling plate 553. The movable plate 552 and the coupling plate 553 are plate-like members arranged so that the plate surfaces are parallel to the ZY plane (that is, the image generation surface of the DMD 551). The movable plate 552 and the coupling plate 553 are provided in parallel in the X direction with a predetermined gap, and one end portion (one end portion in the Z direction in this embodiment) is coupled.

  The movable plate 552 of the movable member 55A is disposed between the top plate 511 and the base plate 512 of the fixed member 51A. That is, in the present embodiment, the movable plate 552, the coupling plate 553, the top plate 511, and the base plate 512 are plate-like members that are parallel to the ZY plane (the image display surface of the DMD 551), and are plates along the ZY plane. The planes are arranged in parallel along the X direction. The movable plate 552 is arranged so as to be movable along the ZY plane.

  The coupling plate 553 of the movable member 55A is fixed to the movable plate 552 with the base plate 512 of the fixed member 51A sandwiched between the movable plate 552 and the movable plate 552. A DMD 551 and a heat sink 554 are fixed to the coupling plate 553 in this order.

  The coupling plate 553 is fixed to the movable plate 552, so that the DMD 551 and the heat sink 554 are supported together with the movable plate 552, and is supported movably with respect to the illumination optical unit 40 by the fixed member 51A.

  The movable member 55B has a movable plate 562. The movable plate 562 is a plate-like member arranged so that the plate surface is parallel to the ZY plane (that is, the image generation surface of the DMD 551). The movable plate 562 is coupled to the heat sink 554.

  The movable plate 562 of the movable member 55B is disposed between the top plate 571 and the base plate 572 of the fixed member 51B. That is, in the present embodiment, the movable plate 562, the top plate 571, and the base plate 572 are plate-like members parallel to the ZY plane (image display surface of the DMD 551), and the plate surfaces along the ZY plane are mutually X They are arranged in parallel along the direction. The movable plate 562 is arranged so as to be movable along the ZY plane.

  As described above, in the present embodiment, the image generation unit 560 includes the pair of movable members 550 (movable member 55A and movable member 55B) arranged in parallel in the X direction with the image generation unit 560 interposed therebetween. Are supported at both ends.

  FIG. 7 is a perspective view illustrating the fixing member 51A of the fixing unit 51 in the present embodiment. FIG. 8 is an exploded perspective view illustrating a fixing member 51A of the fixing unit 51 in the present embodiment.

  As shown in FIGS. 7 and 8, the fixing member 51 </ b> A includes at least a top plate 511 and a base plate 512. The top plate 511 and the base plate 512 are formed of flat plate-like members, and central holes 513 and 514 are provided at positions corresponding to the DMD 551 of the movable unit 55, respectively. The top plate 511 and the base plate 512 are provided in parallel by a plurality of support columns 515 with a predetermined gap therebetween.

  As shown in FIG. 8, the support column 515 is press-fitted into a support hole 516 formed in the top plate 511 at the upper end (one end in the arrow X direction), and the lower end (in the arrow X direction) in which the male screw groove is formed. Is inserted into a support hole 517 formed in the base plate 512. The support columns 515 form a fixed interval between the top plate 511 and the base plate 512, and support the top plate 511 and the base plate 512 so that the plate surfaces (plate surfaces along the ZY plane) are parallel to each other.

  The top plate 511 and the base plate 512 are formed with a plurality of support holes 522 and 526 for holding the support sphere 521 in a rotatable manner.

  A cylindrical holding member 523 having an internal thread groove on the inner peripheral surface is inserted into the support hole 522 of the top plate 511. The holding member 523 rotatably holds the support sphere 521, and the position adjusting screw 524 is inserted from above. The lower end side of the support hole 526 of the base plate 512 is closed by the lid member 527, and the support sphere 521 is rotatably held.

  The support spheres 521 rotatably held in the support holes 522 and 526 of the top plate 511 and the base plate 512 are in contact with the movable plate 552 disposed between the top plate 511 and the base plate 512, respectively, and move the movable plate 552. Support as possible.

  The configuration of the fixing member 51B is the same as that of the fixing member 51A shown in FIGS. 7 and 8 except that a top plate 571 is provided instead of the top plate 511 and a base plate 572 is provided instead of the base plate 512. In the fixing member 51B, the support spheres 521 rotatably held in the support holes 522 and 526 of the top plate 511 and the base plate 512 are in contact with the movable plate 562 disposed between the top plate 511 and the base plate 512, respectively. Then, the movable plate 562 is movably supported.

  Returning to FIG. 6, the fixed member 51 </ b> A sandwiches the movable plate 552 in the movable member 55 </ b> A from both sides in the X direction via the plurality of support spheres 521 by the above-described top plate 511 and base plate 512. Support. The fixed member 51B supports the movable member 55B by sandwiching the movable plate 562 of the movable member 55B from both sides in the X direction by the above-described top plate 571 and base plate 572.

  Therefore, the movable member 55A and the movable member 55B are supported by the fixed member 51A and the fixed member 51B so as to be movable along the ZY plane. Further, by using the support sphere 521, sliding friction can be reduced.

  In the present embodiment, one end side in the X direction of the image generation unit 560 (DMD 551 and heat sink 554) is supported by the coupling plate 553 of the movable member 55A, and the other end side in the X direction is the movable plate 562 of the movable member 55B. Is supported by. Further, the image display surface of the DMD 551 is disposed in parallel to the plate surfaces of plate members (each plate) constituting each of the movable member 55A, the movable member 55B, the fixed member 51A, and the fixed member 51B.

  For this reason, in the present embodiment, the image generation unit 560 moves the movable member 55A and the movable member 55B with respect to the illumination optical unit 40 so as to be movable along a plane parallel to the image display surface of the DMD 551. Via the fixing member 51A and the fixing member 51B.

  FIG. 9 is a view for explaining a support structure of movable plate 552 by fixed member 51A in the present embodiment. FIG. 10 is a partial enlarged view illustrating the schematic configuration of the portion A shown in FIG.

  As shown in FIGS. 9 and 10, in the top plate 511, the support sphere 521 is rotatably held by the holding member 523 inserted into the support hole 522. Further, in the base plate 512, the support sphere 521 is rotatably held by the support hole 526 whose lower end side is closed by the lid member 527.

  Each support sphere 521 is held so that at least a part thereof protrudes from the support holes 522 and 526, and supports and supports a movable plate 552 provided between the top plate 511 and the base plate 512. The movable plate 552 is supported from both sides in the X direction by a plurality of support spheres 521 rotatably provided so as to be movable in a direction parallel to the top plate 511 and the base plate 512 and parallel to the ZY plane. .

  In addition, the amount of protrusion of the support sphere 521 provided on the top plate 511 side from the one end of the holding member 523 varies depending on the position of the position adjusting screw 524 that contacts the opposite side of the movable plate 552. By changing the protruding amount of the support sphere 521 using the position adjusting screw 524, the distance between the top plate 511 and the movable plate 552 can be adjusted as appropriate.

  Note that the number, position, and the like of the support columns 515 and the supporting spheres 521 provided on the fixed member 51A are not limited to the configuration exemplified in this embodiment as long as the movable plate 552 can be supported movably.

  Further, the support structure of the movable plate 562 by the fixed member 51B is the same as that of the movable plate 552 except that a top plate 571 is used instead of the top plate 511, a base plate 572 is used instead of the base plate 512, and a movable plate 562 is used instead of the movable plate 552. Similar to the support structure.

  Here, the movable member 550 and the fixed member 510 are provided with a drive unit 82 composed of a magnet and a coil. In the present embodiment, a case will be described in which the image projection apparatus 1 includes a drive unit 80 for driving the movable member 55A and a drive unit 81 for driving the movable member 55B as the drive unit 82.

  Specifically, as shown in FIG. 6, the top plate 511 in the fixed member 51 </ b> A and the movable plate 552 in the movable member 55 </ b> A are provided with a drive unit 80 composed of magnets and coils. Further, the top plate 571 in the fixed member 51B and the movable plate 562 in the movable member 55B are provided with a drive unit 81 composed of a magnet and a coil.

  That is, in the present embodiment, a case where the drive unit 82 (drive unit 80, drive unit 81) is configured as an electromagnetic actuator including a magnet and a coil (solenoid) will be described as an example. The drive unit 82 is not limited to an electromagnetic actuator.

  Next, the drive surface formed by the drive unit 82 will be described.

  FIG. 11 is a plan view illustrating the top plate 511 of the fixing member 51A in the present embodiment. A magnet 531, a magnet 532, a magnet 533, and a magnet 534 are provided on the surface of the top plate 511 on the base plate 512 side (see also FIG. 8).

  The magnet 531, the magnet 532, the magnet 533, and the magnet 534 are provided at four locations so as to surround the central hole 513 of the top plate 511. The magnet 531, the magnet 532, the magnet 533, and the magnet 534 are each composed of two rectangular parallelepiped magnets that are arranged so that their longitudinal directions are parallel to each other, and each form a magnetic field that reaches the movable plate 552.

  Each of the magnet 531, the magnet 532, the magnet 533, and the magnet 534 is a drive unit that moves the movable plate 552 with a coil provided on the movable plate 552 so as to face the magnet 531, the magnet 532, the magnet 533, and the magnet 534. 80 (drive unit 80A, drive unit 80B, drive unit 80C, drive unit 80D).

  FIG. 12 is a perspective view illustrating the movable unit 55 in the present embodiment. In FIG. 12, the constituent parts of the movable member 55A and the image generation unit 560 in the movable unit 55 are shown.

  The movable member 55 </ b> A includes a movable plate 552, a coupling plate 553, and a DMD substrate 555 that holds the top plate 511.

  The DMD substrate 555 holds the DMD 551 and is coupled to the coupling plate 553. The coupling plate 553 holds the heat sink 554. For this reason, the coupling plate 553 fixes and holds the DMD 551 by the DMD substrate 555. The coupling plate 553 holds the DMD 551 and the heat sink 554 in contact with each other.

  The movable plate 552 is formed of a flat plate-like member, has a central hole 570 at a position corresponding to the DMD 551 provided on the DMD substrate 555, and a coil 581, a coil 582, a coil 583, and a coil 584 around the central hole 570. Is provided.

  Coil 581, coil 582, coil 583, and coil 584 are each formed by winding an electric wire around an axis parallel to the X direction. The coil 581, the coil 582, the coil 583, and the coil 584 are provided in a recess formed on the surface of the movable plate 552 on the top plate 511 side, and are covered with a cover. Then, in a state where the movable member 55A is supported by the fixed member 51A, each of the coil 581, the coil 582, the coil 583, and the coil 584 is the magnet 531, the magnet 532, the magnet 533, and the magnet 534 of the top plate 511 (see FIG. 11). ) Are arranged at positions facing each other.

  Therefore, the coil 581, the coil 582, the coil 583, and the coil 584 provided on the movable plate 552 are movable between the magnet 531, the magnet 532, the magnet 533, and the magnet 534 provided on the top plate 511. A drive unit 80 (drive unit 80A, drive unit 80B, drive unit 80C, drive unit 80D) that moves the plate 552 (that is, the movable member 55A) is configured.

  When a current is passed through the coil 581, the coil 582, the coil 583, and the coil 584 under the control of the movement control unit 12, the movable plate 552 is moved by the magnetic field formed by the magnet 531, the magnet 532, the magnet 533, and the magnet 534. A Lorentz force as a driving force is generated along the ZY plane (parallel to the image display surface).

  The movable plate 552 receives a Lorentz force as a driving force generated between the magnet 531, the magnet 532, the magnet 533, and the magnet 534 and the coil 581, the coil 582, the coil 583, and the coil 584, thereby receiving the fixed unit 51 (fixing member 51A) is displaced linearly or rotating in the ZY plane.

  That is, the driving unit 80 generates a driving surface on which a driving force is applied in a region where the movable plate 552 and the top plate 511 face each other. In other words, the driving unit 80 drives the image generating unit 560 with a driving force for moving the image generating unit 560 (DMD 551 and the heat sink 554) parallel to the image generating surface (ZY plane) of the DMD 551. Form.

  FIG. 13 is an explanatory diagram of the drive surface P on which the driving force is formed, which is formed by the drive unit 82 (the drive unit 80 and the drive unit 81).

  As described with reference to FIGS. 11 and 12, each of the coil 581, the coil 582, the coil 583, and the coil 584 provided on the movable plate 552, the magnet 531, the magnet 532, and the magnet 533 provided on the top plate 511. Each of the magnets 534 constitutes a drive unit 80 (drive unit 80A, drive unit 80B, drive unit 80C, drive unit 80D) that moves the movable plate 552 (that is, the movable member 55A). And as shown in FIG. 13, by this drive part 80 (drive part 80A, drive part 80B, drive part 80C, drive part 80D), movable plate 552 of movable member 55A, top plate 511 of fixed member 51B, In the meantime, the drive surface P1 parallel to the image display surface of the DMD 551 is formed.

  Next, the drive surface P2 formed on the fixed member 51B and movable member 55B side by the drive unit 81 will be described.

  FIG. 14 is a plan view illustrating the top plate 571 of the fixing member 51B in the present embodiment. A magnet 541, a magnet 542, a magnet 543, and a magnet 544 are provided on the surface of the top plate 571 on the base plate 572 side.

  The magnets 541, 542, 543, and 544 are provided at four locations so as to surround the central hole 513 of the top plate 571. The magnets 541, 542, 543, and 544 are composed of two rectangular parallelepiped magnets arranged so that their longitudinal directions are parallel to each other, and form a magnetic field that extends to the movable plate 562.

  Each of the magnet 541, the magnet 542, the magnet 543, and the magnet 544 is a driving unit that moves the movable plate 562 with a coil provided on the movable plate 562 so as to face the magnet 541, the magnet 542, the magnet 543, and the magnet 544. 81 (drive unit 81A, drive unit 81B, drive unit 81C, drive unit 81D).

  FIG. 15 is an exploded perspective view illustrating the movable unit 55 in the present embodiment. In FIG. 15, the movable member 55 </ b> B and the heat sink 554 in the movable unit 55 are shown.

  The movable member 55B includes a movable plate 562 and a support plate 563. The support plate 563 is coupled to the movable plate 562 at one end in the Z direction, and holds the heat sink 554. The heat sink 554 is coupled to the support plate 563 by a screw member 5600 and a spring member 5610.

  The movable plate 562 is formed of a flat plate-like member, has a central hole 590 at a position corresponding to the DMD 551 provided on the DMD substrate 555, and has a coil 591, a coil 592, a coil 593, and a coil 594 around the central hole 590. Is provided.

  The coil 591, the coil 592, the coil 593, and the coil 594 are each formed by winding an electric wire around an axis parallel to the X direction. The coil 591, the coil 592, the coil 593, and the coil 594 are provided in a recess formed in the movable plate 562 and are covered with a cover. Then, in a state where the movable member 55B is supported by the fixed member 51B, each of the coil 591, the coil 592, the coil 593, and the coil 594 is the magnet 541, the magnet 542, the magnet 543, and the magnet 544 of the top plate 571 (see FIG. 14). ) Are arranged at positions facing each other.

  Therefore, the coil 591, the coil 592, the coil 593, and the coil 594 provided on the movable plate 562 and the magnet 541, the magnet 542, the magnet 543, and the magnet 544 provided on the top plate 571 are movable. A drive unit 81 (a drive unit 81A, a drive unit 81B, a drive unit 81C, and a drive unit 81D) that moves the plate 562 (that is, the movable member 55B) is configured.

  That is, when a current is passed through the coil 591, the coil 592, the coil 593, and the coil 594 under the control of the movement control unit 12, the movable plate 562 is moved by the magnetic field formed by the magnet 541, the magnet 542, the magnet 543, and the magnet 544. A Lorentz force as a driving force to be moved is generated along the ZY plane.

  The movable plate 562 receives a Lorentz force as a driving force generated between the magnet 541, the magnet 542, the magnet 543, the magnet 544 and the coil 591, the coil 592, the coil 593, and the coil 594, and receives the fixed unit 51 (fixing member). 51B) is displaced linearly or rotated in the ZY plane.

  For this reason, the driving unit 81 generates a driving surface on which a driving force for moving the DMD 551 and the heat sink 554 is moved in a region where the movable plate 562 and the top plate 571 are opposed to each other. In other words, the drive unit 81 has a drive surface parallel to the image generation surface (ZY plane) of the DMD 551 and parallel to the drive surface P1 via the image generation unit 560 with respect to the image generation unit 560. Form.

  That is, as described with reference to FIGS. 14 and 15, each of the coil 591, the coil 592, the coil 593, and the coil 594 provided on the movable plate 562, and the magnet 541 and the magnet 542 provided on the top plate 571. Each of the magnets 543 and 544 constitutes a drive unit 81 (a drive unit 81A, a drive unit 81B, a drive unit 81C, and a drive unit 81D) that moves the movable plate 562 (that is, the movable member 55B). And as shown in FIG. 13, by this drive part 81 (drive part 81A, drive part 81B, drive part 81C, drive part 81D), the movable plate 562 of the movable member 55B, the top plate 571 of the fixed member 51B, In the meantime, the drive surface P2 parallel to the image display surface of the DMD 551 is formed.

  Therefore, in the present embodiment, the image display unit 50 is provided with a pair of parallel to the image display surface of the DMD 551 via the image generation unit 560 by the drive unit 82 (drive unit 80, drive unit 81). The drive surface P (drive surface P1, drive surface P2) is formed outside the image generation unit 560.

  As described above, in the image projection apparatus 1 according to the present embodiment, the image generation unit 560 (DMD 551, heat sink 554) is supported by the plurality of movable members 550. In this embodiment, the image generation unit 560 (DMD 551, heat sink 554) is moved from both sides in the X direction (normal direction of the image display surface of the DMD 551) by a pair of movable members 550 (movable member 55A and movable member 55B). It is supported so as to be sandwiched.

  The movable member 55A is movably supported by the fixed member 51A. The movable member 55B is supported by the fixed member 51B so as to be movable.

  Further, the image projection apparatus 1 includes a driving unit 80 that forms a driving surface P1 on the facing surface between the fixed member 51A and the movable member 55A, and a driving that forms a driving surface P2 on the facing surface between the fixed member 51B and the movable member 55B. Unit 81. For this reason, a plurality of driving surfaces P on which a driving force for moving the image generating unit 560 acts are formed outside the image generating unit 560.

  For this reason, the image generation unit 560 moves (displaces) by the driving force formed by the plurality of driving surfaces P.

  The movement control unit 12 moves the movable plate 552 and the movable plate 562 depending on the magnitude and direction of the current flowing through the coils 581, 582, 583, 584, the coil 591, the coil 592, the coil 593, and the coil 594 ( Rotation) direction, movement amount, rotation angle, etc. are controlled. At this time, the movement control unit 12 controls the drive unit 80 and the drive unit 81 so that the movable plate 552 and the movable plate 562 move by the same movement amount in the same direction.

  For this reason, the driving force that moves the same amount of movement in the same direction is applied to the image generation unit 560 by the plurality of driving surfaces P.

  FIG. 16 is an explanatory diagram of the movement of the image generation unit 560.

  As shown in FIG. 16A, in the present embodiment, a drive unit 80A configured by a coil 581 and a magnet 531 and a drive unit 80D configured by a coil 584 and a magnet 534 are provided via a DMD 551. Are arranged opposite to each other in the Y direction.

  Further, on the opposite side in the X direction with respect to the drive unit 80A of the image generation unit 560, a drive unit 81A configured by a coil 541 and a magnet 591 is disposed to face the drive unit 80A via the image generation unit 560. Yes. Further, on the opposite side in the X direction with respect to the drive unit 80D of the image generation unit 560, a drive unit 81D configured by a coil 544 and a magnet 594 is disposed to face the drive unit 80D via the image generation unit 560. Yes.

  The movement control unit 12 performs control so that currents in the same direction flow through the coil 581 of the drive unit 80A, the coil 584 of the drive unit 80D, the coil 591 of the drive unit 81A, and the coil 594 of the drive unit 81D. Then, in each of the driving unit 80A, the driving unit 80D, the driving unit 81A, and the driving unit 81D, a direction parallel to the Y direction (the direction of the arrow B′1 or the direction opposite to the direction of the arrow B′1) ) Lorentz force is generated.

  That is, the drive surface P1 formed by the drive unit 80 and the drive surface P2 formed by the drive unit 81 are parallel to the Y direction on these drive surfaces P (drive surface P1, drive surface P2). Directional Lorentz force is generated.

  Therefore, the movable member 55A and the movable member 55B that hold the image generation unit 560 (DMD551, heat sink 554) are parallel to the Y direction along the drive surface P with respect to each of the fixed member 51A and the fixed member 51B. Move in the direction (arrow B1 direction or the reverse direction of arrow B1 direction).

  In addition, as shown in FIG. 16B, in this embodiment, the drive unit 80B configured by the coil 582 and the magnet 532 and the drive unit 80C configured by the coil 583 and the magnet 533 are movable. The members 55A are arranged side by side in the Y direction in the region of one end in the Z direction.

  Further, on the opposite side of the image generation unit 560 to the drive unit 80B in the X direction, a drive unit 81B configured by a coil 542 and a magnet 592 is disposed to face the drive unit 80B. Further, on the opposite side of the image generation unit 560 to the drive unit 80C in the X direction, a drive unit 81C configured by a coil 543 and a magnet 593 is disposed to face the drive unit 80C.

  The movement control unit 12 performs control to flow currents in the same direction to the coil 582 of the drive unit 80B, the coil 542 of the drive unit 81B, the coil 583 of the drive unit 80C, and the coil 543 of the drive unit 81C. Then, in each of the drive unit 80B, the drive unit 80C, the drive unit 81B, and the drive unit 81C, the Z direction (arrow B′2 direction (that is, the vertical direction) or arrow B′2 direction) A Lorentz force in the reverse direction (anti-vertical direction) is generated.

  That is, the drive surface P1 formed by the drive unit 80 and the drive surface P2 formed by the drive unit 81 are parallel to the Z direction on these drive surfaces P (drive surface P1, drive surface P2). Directional Lorentz force is generated.

  Therefore, the movable member 55A and the movable member 55B that hold the DMD 551 and the heat sink 554 are parallel to the Z direction with respect to each of the fixed member 51A and the fixed member 51B (the arrow B2 direction or the reverse direction of the arrow B2 direction). )

  As shown in FIG. 16C, the movement control unit 12 includes a coil 582 of the drive unit 80B and a coil 542 of the drive unit 81B, a coil 583 of the drive unit 80C, and a coil 543 of the drive unit 81C. Control is performed to pass currents in opposite directions. Then, a Lorentz force in opposite directions in the Z direction is generated in the driving unit 80B and the driving unit 81B, and in the driving unit 80C and the driving unit 81C (for example, in the direction of the arrow B′3 (ie, in the anti-vertical direction). ) And arrow B′4 direction (that is, vertical direction)).

  That is, the drive surface P1 formed by the drive unit 80 and the drive surface P2 formed by the drive unit 81 are parallel to the Z direction on these drive surfaces P (drive surface P1, drive surface P2). In addition, Lorentz forces in opposite directions are generated.

  In this case, the movable member 55A and the movable member 55B holding the DMD 551 and the heat sink 554 are clockwise or counterclockwise along the ZY plane with respect to each of the fixed member 51A and the fixed member 51B (in the direction of arrow B3 in FIG. 16). ).

  In this way, the movement control unit 12 controls the drive unit 82 (drive unit 80, drive unit 81) to move the image generation unit 560 (DMD 551, heat sink 554) relative to the illumination optical unit 40. It can be performed. The amount of movement of the image generation unit 560 can be adjusted by adjusting the intensity of the current applied to the drive unit 82 (drive unit 80, drive unit 82).

  The movement control unit 12 drives the drive surface P1 formed by the drive unit 80 and the drive surface P2 formed by the drive unit 81 with the same timing, the same direction (including rotation), and the same strength. The timing at which current is applied to the drive unit 80 and the drive unit 81, the strength of the applied current, which drive unit 82 (drive unit 80 (drive unit 80A to drive unit 80D), drive unit 81 ( The drive unit 81A to the drive unit 81D)) is adjusted to apply a current.

  In addition, the movement control unit 12 moves the DMD 551 along the ZY plane, thereby displacing the position of the pixel corresponding to each micromirror of the DMD 551.

  For example, the movement control unit 12 controls the driving unit 80 to periodically move the position of each micromirror with respect to the illumination optical unit 40 by half a pixel in the vertical direction (such as the Z direction). By this control, the image projector 1 can increase the resolution in the vertical direction of the image to be projected. Further, the movement control unit 12 controls the driving unit 82 to adjust the movement direction (including rotation) of the DMD 551 so that an image whose resolution is increased in both the Z direction and the Y direction is displayed from the DMD 551 to the illumination optical unit. 40. For this reason, the resolution of the image projected on the screen S can be increased.

  As described above, the image projection apparatus 1 according to the present embodiment includes the image generation unit 560 (image generation unit), the illumination optical unit 40 (illumination optical unit), the projection unit 60 (projection unit), and the drive unit. 82 (driving means).

  The image generation unit 560 receives light emitted from the light source 30 on the image generation surface, generates a image using the received light, and a heat sink 554 that cools the DMD 551 (light modulation element). (Cooling member). The illumination optical unit 40 (illumination optical means) guides the light emitted from the light source 30 to the DMD 551 (light modulation element). The projection unit 60 (projection unit) projects an image generated by the DMD 551 (light modulation element). The driving unit 82 (driving unit) forms a plurality of driving surfaces P on which driving force for moving the image generating unit 560 (image generating unit) is moved relative to the image generating unit 560 (image generating unit). The image generation unit 560 (image generation means) is moved relative to the illumination optical unit 40 (illumination optical means) along the plane P.

  Thus, in the present embodiment, the drive unit 82 forms a plurality of drive surfaces P instead of one drive surface P for the image generation unit 560 having the DMD 551 and the heat sink 554. Then, the image generation unit 560 moves relative to the illumination optical unit 40 along the plurality of formed drive surfaces P.

  For this reason, in the present embodiment, the image generation unit 560 can be moved (displaced) by the driving force of the plurality of driving surfaces P. Therefore, in the image projection apparatus 1 according to the present embodiment, the influence of gravity (force acting in the Z direction) when the DMD 551 is displaced can be reduced, and the image generation unit 560 can be driven (displaced) stably.

  Therefore, the image projector 1 according to the present embodiment can displace the DMD 551 (light modulation element) stably.

  Further, the drive unit 82 can form a plurality of drive surfaces P (drive surface P1, drive surface P2) that are parallel to or cross each other via the image generation unit 560 (image generation means).

  Further, the drive unit 82 (drive unit) is parallel to the image generation surface of the DMD 551 (light modulation element) and the image generation unit 560 (image generation unit) via the image generation unit 560 (image generation unit). A pair of opposing drive surfaces P (drive surface P1, drive surface P2) is formed.

  For this reason, the image generation unit 560 of the image projection apparatus 1 can be displaced along the drive surface P1 and the drive surface P2 formed on both sides with the image generation unit 560 interposed therebetween.

  In addition, the image projection apparatus 1 can include a plurality of movable members (movable member 55A, movable member 55B) and a plurality of fixed members (fixed member 51A, fixed member 51B).

  The plurality of movable members (movable member 55A, movable member 55B) are arranged at different positions outside the image generation unit 560 (image generation unit), and the image generation unit 560 (image generation unit) is connected to the illumination optical unit 40 (illumination). It is a flat member that is movably supported with respect to the optical means).

  The plurality of fixed members (fixed member 51A, fixed member 51B) are arranged to face each of the plurality of movable members (movable member 55A, movable member 55B), and each of the plurality of movable members (movable member 55A, movable member 55B). Is a flat plate-like member that movably supports.

  And the drive part 82 (drive part 80, drive part 81) is the drive surface P (drive) on the opposing surface to the fixed member (fixed member 51A, fixed member 51B) in a movable member (movable member 55A, movable member 55B). Surface P1 and driving surface P2) are formed.

  The image generation unit 560 (image generation means) is supported by a pair of movable members 550 (movable member 55A and movable member 55B) so as to be sandwiched from both sides in the normal direction of the image display surface of the DMD 551. Further, each of the pair of movable members 550 (movable member 55A, movable member 55B) is movably supported by fixed members (fixed member 51A, fixed member 51B). For example, the movable member 55A is movably supported by the fixed member 51A. The movable member 55B is supported by the fixed member 51B so as to be movable.

  And the drive part 82 (drive part 80, the drive part 81) is on the opposing surface with the fixed member (fixed member 51A, fixed member 51B) in each of a pair of movable member 550 (movable member 55A, movable member 55B). The drive surface P (drive surface P1, drive surface P2) is formed.

  For this reason, a pair of parallel drive surfaces P on which the driving force for moving the image generation means (image generation unit 560) acts outside the image generation means (image generation unit 560) causes the image generation unit 560 to move. It will be formed through. Therefore, the image generation unit 560 moves (displaces) by the driving force formed by the plurality of parallel driving surfaces P. Therefore, the image projection apparatus 1 of the present embodiment can displace the DMD 551 (light modulation element) more stably.

  The drive unit 82 (drive unit 80, drive unit 81) can be an electromagnetic actuator.

  Moreover, the image projection apparatus 1 of this Embodiment can be provided with a movement control means (movement control part 12). In the movement control unit 12, the image generation unit (image generation unit 560) moves along the drive surface P (drive surface P1, drive surface P2) or rotates along the drive surface P (drive surface P1, drive surface P2). Thus, the drive unit 82 (drive unit 80, drive unit 81) is controlled.

(Modification)
In the above embodiment, the drive unit 82 (drive units 80 and 81) is parallel to the image generation surface (ZY plane) of the DMD 551 and faces the image generation unit 560 via the image generation unit 560. The case where the pair of driving surfaces P1 and P2 is formed has been described as an example.

  However, the drive part 82 should just form a some drive surface with respect to the image generation part 560, and is not limited to the form which forms a pair of drive surface mutually parallel.

  FIG. 17 is an explanatory diagram of an example of a drive surface formed by the drive unit 82. For example, the driving unit 82 has two or more of the driving surface P1, the driving surface P2, the driving surface P3, the driving surface P4, the driving surface P5, and the driving surface P6 with respect to the cubic image generation unit 560. The following drive surface P may be formed.

  As described above, the drive surface P1 is a drive surface facing the image display surface of the DMD 551 in the image generation unit 560. The drive surface P2 is a drive surface that faces the drive surface P1 in parallel via the image generation unit 560. The drive surface P4 and the drive surface P6 are drive surfaces that face in parallel via the image generation unit 560, and are orthogonal to the drive surface P1. The driving surface P3 and the driving surface P5 are driving surfaces facing in parallel via the image generation unit 560, and are orthogonal to the driving surface P1 and the driving surface P6.

  Each of the driving surfaces P3 to P6 is provided with a pair of movable members and fixed members that are parallel to the driving surfaces and sandwich the driving surfaces, like the driving surfaces P1 and P2. The drive part 82 comprised by a magnet and a coil should just be arrange | positioned at each of the opposing surface of this movable member and a drive member. The movable member and the fixed member may have the same configuration as that of the movable member 55A and the fixed member 51A described above.

  As mentioned above, although embodiment and the modification of this invention were demonstrated, the above-mentioned embodiment and modification are shown as an example, and are not intending limiting the range of invention. The present invention is not limited to the above-described embodiments and modifications as they are, and can be embodied by modifying the components without departing from the scope of the invention in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above-described embodiments. For example, some components may be deleted from all the components shown in the embodiment.

DESCRIPTION OF SYMBOLS 1 Image projector 12 Movement control part 40 Illumination optical unit 50 Image display unit 60 Projection unit 80, 81, 82 Drive part 51A, 51B, 510 Fixed member 55A, 55B, 550 Movable member 551 DMD
554 heat sink 560 image generation unit

JP 2007-248721 A

Claims (7)

An image generation means including a light modulation element that receives light emitted from a light source on an image generation surface and generates an image using the received light; and a cooling member that cools the light modulation element;
Illumination optical means for guiding light emitted from the light source to the light modulation element;
Projection means for projecting an image generated by the light modulation element;
A plurality of driving surfaces on which a driving force for moving the image generating unit is applied to the image generating unit, and the image generating unit is relative to the illumination optical unit along the plurality of driving surfaces. Driving means for moving automatically,
An image projection apparatus comprising:   The image projection apparatus according to claim 1, wherein the driving unit forms a plurality of the driving surfaces that are parallel to or cross each other via the image generating unit.   The said drive means forms a pair of said drive surface which is parallel to the said image generation surface of the said light modulation element with respect to the said image generation means, and opposes via the said image generation means. Image projection device. A plurality of plate-like movable members which are arranged at different positions outside the image generation means and support the image generation means movably with respect to the illumination optical means;
A flat plate-shaped fixing member that is disposed opposite to each of the plurality of movable members and supports each of the plurality of movable members in a movable manner;
With
The drive means forms the drive surface on a surface of the movable member facing the fixed member.
The image projector of any one of Claims 1-3. The image generation means is supported by a pair of movable members so as to be sandwiched from both sides in the normal direction of the image generation surface,
Each of the pair of movable members is movably supported by the fixed member.
The image projection apparatus according to claim 4.   The image projecting apparatus according to claim 1, wherein the driving unit is an electromagnetic actuator. A movement control means for controlling the driving means so that the image generating means moves along the driving surface or rotates along the driving surface;
The image projection apparatus of any one of Claims 1-6.