JP6828370B2 - Image generator and image projection device - Google Patents

Description

The present invention relates to images generating apparatus and an image projection apparatus.

In an image projection device that projects an image on a screen or the like based on input image data, there is a method of pseudo-high resolution of the projected image and improvement of image quality by shifting the projected image at high speed so as to slightly shift the projected image. Are known.

For example, an image display device capable of displaying an image having a resolution higher than the resolution of the display element by shifting the optical axis by a pixel shifting means to shift the light rays emitted from a plurality of pixels of the display element. Is known (see, for example, Patent Document 1).

Further, as a method of shifting the projected image, it is conceivable to shift the image generation unit that generates the projected image at high speed. In this case, for example, a magnetic actuator including a magnet and a coil can be used to shift the substrate provided with the image generation unit at high speed. Further, for example, by providing a small Hall element capable of high-precision position detection at a position facing the magnet of the magnetic actuator, it is possible to control an image or the like that detects and generates the position of the image generation unit.

However, in the configuration using the magnetic actuator and the Hall element described above, the Hall element may be affected by the magnetic field of the magnetic actuator and the position detection accuracy may decrease.

The present invention has been made in view of the above, and an object of the present invention is to provide a movable device, an image generation device, and an image projection device capable of detecting a position to shift at high speed with high accuracy.

The image generator according to one aspect of the present invention is
A fixing unit including a first fixing plate and a second fixing plate made of a magnetic material,
A movable unit including a movable plate movably supported between the first fixing plate and the second fixing plate, and a movable portion fixed to the movable plate with the second fixing plate sandwiched between them. When,
Either the fixed unit and the first pair serving as the driving force generating mechanism or the second pair serving as the position detecting mechanism are arranged so as to face the movable plate.
The fixed unit and the first pair or the second pair arranged to face the movable portion,
It has an image generation unit provided in the movable unit, and has
The movable portion has a connecting plate fixed to the movable plate, and has a connecting plate.
The image generating unit and the connecting plate are overlapped and fixed .

According to the embodiment of the present invention, a movable device, an image generation device, and an image projection device capable of detecting a position to shift at high speed with high accuracy are provided.

It is a figure which illustrates the image projection apparatus in 1st Embodiment. It is a block diagram which illustrates the structure of the image projection apparatus in 1st Embodiment. It is a perspective view which illustrates the image engine in 1st Embodiment. It is a figure which illustrates the illumination optical system unit in 1st Embodiment. It is a figure which illustrates the internal structure of the projection optical system unit in 1st Embodiment. It is a perspective view which illustrates the image generation unit in 1st Embodiment. It is a side view which illustrates the image generation unit in 1st Embodiment. It is an exploded perspective view which illustrates the image generation unit in 1st Embodiment. It is an exploded side view which illustrates the image generation unit in 1st Embodiment. It is a perspective view which illustrates the fixed unit in 1st Embodiment. It is an exploded perspective view which illustrates the fixed unit in 1st Embodiment. It is a figure explaining the support structure of the movable plate by the fixed unit in 1st Embodiment. It is a partially enlarged view explaining the support structure of the movable plate by the fixed unit in 1st Embodiment. It is a bottom view which illustrates the top plate in 1st Embodiment. It is a perspective view which illustrates the movable unit in 1st Embodiment. It is an exploded perspective view which illustrates the movable unit in 1st Embodiment. It is a perspective view which illustrates the movable plate in 1st Embodiment. It is a perspective view which illustrates the movable unit which removed the movable plate in 1st Embodiment. It is a figure explaining the DMD holding structure of the movable unit in 1st Embodiment. It is a perspective view which illustrates the image generation unit in 2nd Embodiment. It is an exploded perspective view which illustrates the image generation unit in 2nd Embodiment. It is an exploded side view which illustrates the image generation unit in 2nd Embodiment. It is a perspective view which illustrates the image generation unit in 3rd Embodiment. It is an exploded perspective view which illustrates the image generation unit in 3rd Embodiment. It is an exploded side view which illustrates the image generation unit in 3rd Embodiment.

Hereinafter, modes for carrying out the invention will be described with reference to the drawings. In each drawing, the same components may be designated by the same reference numerals and duplicate description may be omitted.

[First Embodiment]
<Configuration of image projection device>
FIG. 1 is a diagram illustrating the projector 1 in the first embodiment.

The projector 1 is an example of an image projection device, which has an exit window 3 and an external I / F9, and is provided with an optical engine for generating a projected image inside. When image data is transmitted from, for example, a personal computer or a digital camera connected to an external I / F9, the projector 1 generates a projected image based on the transmitted image data by the optical engine, as shown in FIG. The image P is projected from the exit window 3 onto the screen S.

In the drawings shown below, the X1X2 direction is the width direction of the projector 1, the Y1Y2 direction is the depth direction of the projector 1, and the Z1Z2 direction is the height direction of the projector 1. Further, in the following, the projector 1 may be described with the exit window 3 side as the upper side and the side opposite to the exit window 3 as the lower side.

FIG. 2 is a block diagram illustrating the configuration of the projector 1 according to the first embodiment.

As shown in FIG. 2, the projector 1 includes a power supply 4, a main switch SW5, an operation unit 7, an external I / F9, a system control unit 10, a fan 20, and an optical engine 15.

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

The main switch SW5 is used for the ON / OFF operation of the projector 1 by the user. When the main switch SW5 is turned on while the power supply 4 is connected to a commercial power supply via a power cord or the like, the power supply 4 starts supplying power to each part of the projector 1 and the main switch SW5 is turned off. Then, the power supply 4 stops the power supply to each part of the projector 1.

The operation unit 7 is a button or the like that receives various operations by the user, and is provided on, for example, the upper surface of the projector 1. The operation unit 7 accepts user operations such as the size, color tone, and focus adjustment of the projected image. The user operation received by the operation unit 7 is sent to the system control unit 10.

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

The system control unit 10 includes an image control unit 11 and a drive control unit 12. The system control unit 10 includes, for example, a CPU, a ROM, a RAM, and the like, and the CPU cooperates with the RAM to execute a program stored in the ROM, thereby realizing the functions of each unit.

The image control unit 11 is a digital micromirror device (hereinafter, simply referred to as “DMD”) provided in the image generation unit 50 of the optical engine 15 based on the image data input from the external I / F9. ) 551 is controlled to generate an image to be projected on the screen S.

The drive control unit 12 controls a drive unit that moves the movable unit 55 that is movably provided in the image generation unit 50, and controls the position of the DMD 551 that is provided in the movable unit 55.

The fan 20 is controlled by the system control unit 10 to rotate, and cools the light source 30 of the optical engine 15.

The optical engine 15 has a light source 30, an illumination optical system unit 40, an image generation unit 50, and a projection optical system unit 60, and is controlled by the system control unit 10 to project an image on the screen S.

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

The illumination optical system unit 40 has, for example, a color wheel, a light tunnel, a relay lens, and the like, and guides the light emitted from the light source 30 to the DMD 551 provided in the image generation unit 50.

The image generation unit 50 is an example of an image generation device, and has a fixed unit 51 that is fixedly supported and a movable unit 55 that is movably provided with respect to the fixed unit 51. The movable unit 55 has a DMD 551, and the position of the system control unit 10 with respect to the fixed unit 51 is controlled by the drive control unit 12. The DMD 551 is an example of an image generation unit, which is controlled by the image control unit 11 of the system control unit 10 and modulates the light guided by the illumination optical system unit 40 to generate a projected image.

The projection optical system unit 60 is an example of a projection unit, and has, for example, a plurality of projection lenses, mirrors, and the like, and magnifies an image generated by the DMD 551 of the image generation unit 50 and projects it on the screen S.

<Optical engine configuration>
Next, the configuration of each part of the optical engine 15 of the projector 1 will be described.

FIG. 3 is a perspective view illustrating the optical engine 15 according to the first embodiment. As shown in FIG. 3, the optical engine 15 has a light source 30, an illumination optical system unit 40, an image generation unit 50, and a projection optical system unit 60, and is provided inside the projector 1.

The light source 30 is provided on the side surface of the illumination optical system unit 40 and irradiates light in the X2 direction. The illumination optical system unit 40 guides the light emitted from the light source 30 to the image generation unit 50 provided at the lower part. The image generation unit 50 generates a projected image using the light guided by the illumination optical system unit 40. The projection optical system unit 60 is provided above the illumination optical system unit 40, and projects the projected image generated by the image generation unit 50 to the outside of the projector 1.

The optical engine 15 according to the present embodiment is configured to project an image upward using the light emitted from the light source 30, but the optical engine 15 may be configured to project an image in the horizontal direction. Good.

[Illumination optical system unit]
FIG. 4 is a diagram illustrating the illumination optical system unit 40 in the first embodiment.

As shown in FIG. 4, the illumination optical system unit 40 includes a color wheel 401, a light tunnel 402, relay lenses 403 and 404, a cylinder mirror 405, and a concave mirror 406.

The color wheel 401 is, for example, a disk in which filters of each color of R (red), G (green), and B (blue) are provided in different portions in the circumferential direction. The color wheel 401 rotates at high speed to time-divide the light emitted from the light source 30 into RGB colors.

The light tunnel 402 is formed in a square tubular shape by, for example, laminating flat glass or the like. The light tunnel 402 multi-reflects the light of each RGB color transmitted through the color wheel 401 on the inner surface to make the brightness distribution uniform and guide the light to the relay lenses 403 and 404.

The relay lenses 403 and 404 collect the light emitted from the light tunnel 402 while correcting the axial chromatic aberration.

The cylinder mirror 405 and the concave mirror 406 reflect the light emitted from the relay lenses 403 and 404 to the DMD 551 provided in the image generation unit 50. The DMD 551 modulates the reflected light from the concave mirror 406 to generate a projected image.

[Projection optical system unit]
FIG. 5 is a diagram illustrating the internal configuration of the projection optical system unit 60 according to the first embodiment.

As shown in FIG. 5, the projection optical system unit 60 includes a projection lens 601, a folded mirror 602, and a curved mirror 603 inside the case.

The projection lens 601 has a plurality of lenses, and the projected image generated by the DMD 551 of the image generation unit 50 is formed on the folded mirror 602. The folded mirror 602 and the curved mirror 603 reflect the imaged projected image so as to enlarge it, and project it onto a screen S or the like outside the projector 1.

[Image generation unit]
FIG. 6 is a perspective view illustrating the image generation unit 50 according to the first embodiment. Further, FIG. 7 is a side view illustrating the image generation unit 50 in the first embodiment. In the illustrated example, the image generation unit 50 is an image forming device in which the DMD 551, which is an example of the image generation unit, is arranged in the movable device 100.

As shown in FIGS. 6 and 7, the image generation unit 50 has a fixed unit 51 and a movable unit 55. The fixed unit 51 is fixedly supported by the illumination optical system unit 40. The movable unit 55 is movably supported by the fixed unit 51.

The fixing unit 51 has a top plate 511 and a base plate 512. In the fixing unit 51, the top plate 511 and the base plate 512 are provided in parallel through a predetermined gap, and are fixed to the lower part of the illumination optical system unit 40.

The movable unit 55 has a DMD 551, a movable plate 552, a coupling plate 553, and a heat sink 554, and is movably supported by the fixed unit 51.

The movable plate 552 is provided between the top plate 511 and the base plate 512 of the fixing unit 51. The movable plate 552 is movably supported by the fixing unit 51 in a direction parallel to the top plate 511 and the base plate 512 and parallel to the surface.

The coupling plate 553 is fixed to the movable plate 552 with the base plate 512 of the fixing unit 51 sandwiched between them. The coupling plate 553 is provided with the DMD 551 fixed on the upper surface side, and the heat sink 554 is fixed on the lower surface side. The coupling plate 553 is fixed to the movable plate 552 and is movably supported by the fixed unit 51 together with the movable plate 552, the DMD 551, and the heat sink 554.

The DMD 551 is provided on the surface of the coupling plate 553 on the movable plate 552 side, and is movably provided together with the movable plate 552 and the coupling plate 553. The DMD551 has an image generation surface in which a plurality of movable micromirrors are arranged in a grid pattern. Each micromirror of the DMD551 is provided with a mirror surface that can be tilted around a twist axis, and is driven ON / OFF based on an image signal transmitted from the image control unit 11 of the system control unit 10.

When the micromirror is "ON", for example, the tilt angle is controlled so as to reflect the light from the light source 30 to the projection optical system unit 60. Further, when the micromirror is, for example, "OFF", the inclination angle is controlled in the direction in which the light from the light source 30 is reflected toward the OFF light plate.

In this way, the DMD 551 controls the tilt angle of each micromirror by the image signal transmitted from the image control unit 11, and modulates the light emitted from the light source 30 and passed through the illumination optical system unit 40 to produce a projected image. Generate.

The heat sink 554 is an example of a heat radiating portion, and is provided so that at least a part thereof comes into contact with the DMD 551. The heat sink 554 is provided together with the DMD 551 on the movably supported coupling plate 553, so that the heat sink 554 can come into contact with the DMD 551 and be efficiently cooled. With such a configuration, in the projector 1 according to the present embodiment, the heat sink 554 suppresses the temperature rise of the DMD 551, and the occurrence of problems such as malfunction and failure due to the temperature rise of the DMD 551 is reduced.

FIG. 8 is an exploded perspective view of the image generation unit 50 according to the first embodiment. Further, FIG. 9 is an exploded side view of the image generation unit 50 according to the first embodiment. Hereinafter, the configuration of each part will be described with reference to FIGS. 8 and 9.

(Fixed unit)
FIG. 10 is a perspective view illustrating the fixed unit 51 in the first embodiment. Further, FIG. 11 is an exploded perspective view illustrating the fixed unit 51 in the first embodiment.

As shown in FIGS. 10 and 11, the fixing unit 51 has a top plate 511 as a first fixing plate and a base plate 512 as a second fixing plate.

The top plate 511 and the base plate 512 are flat plate-shaped members made of a magnetic material such as iron or stainless steel. The top plate 511 and the base plate 512 are each provided with central holes 513 and 514 at positions corresponding to DMD551 of the movable unit 55. Further, the top plate 511 and the base plate 512 are provided in parallel by a plurality of columns 515 with a predetermined gap.

As shown in FIG. 11, the support column 515 has a support column whose upper end is press-fitted into the support column hole 516 formed in the top plate 511 and the lower end portion in which the male screw groove is formed is formed in the base plate 512. It is inserted into the hole 517. The strut 515 forms a certain distance between the top plate 511 and the base plate 512, and supports the top plate 511 and the base plate 512 in parallel.

Further, the top plate 511 and the base plate 512 are each formed with a plurality of support holes 522 and 526 that rotatably hold the support sphere 521.

A cylindrical holding member 523 having a female 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 sphere 521 rotatably held in the support holes 522 and 526 of the top plate 511 and the base plate 512 abuts on the movable plate 552 provided between the top plate 511 and the base plate 512, respectively, and the movable plate 552 can be moved. Support.

FIG. 12 is a diagram for explaining a support structure of the movable plate 552 by the fixed unit 51 in the embodiment. Further, FIG. 13 is a partially enlarged view illustrating the schematic configuration of the A portion shown in FIG.

As shown in FIGS. 12 and 13, 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 as to project at least a part from the support holes 522 and 526, and abuts and supports the movable plate 552 provided between the top plate 511 and the base plate 512. The movable plate 552 is supported from both sides 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 surface.

Further, the amount of protrusion of the support sphere 521 provided on the top plate 511 side from the lower end of the holding member 523 changes according to the position of the position adjusting screw 524 that abuts on the side opposite to the movable plate 552. For example, when the position adjusting screw 524 is displaced in the Z1 direction, the amount of protrusion of the support sphere 521 is reduced, and the distance between the top plate 511 and the movable plate 552 is reduced. Further, for example, when the position adjusting screw 524 is displaced in the Z2 direction, the amount of protrusion of the support sphere 521 increases, and the distance between the top plate 511 and the movable plate 552 increases.

In this way, the distance between the top plate 511 and the movable plate 552 can be appropriately adjusted by changing the amount of protrusion of the support sphere 521 using the position adjusting screw 524.

Further, as shown in FIGS. 8 to 11, driving magnets 531, 532, 533, 534 are provided on the surface of the top plate 511 on the base plate 512 side.

FIG. 14 is a bottom view illustrating the top plate 511 in the embodiment. As shown in FIG. 14, driving magnets 531, 532, 533, 534 are provided on the surface of the top plate 511 on the base plate 512 side.

The driving magnets 531, 532, 533, 534 are provided at four locations so as to surround the central hole 513 of the top plate 511. The drive magnets 531, 532, 533, 534 are composed of two rectangular parallelepiped magnets arranged so as to be parallel to each other in the longitudinal direction, and are movable plates supported between the top plate 511 and the base plate 512, respectively. It forms a magnetic field of up to 552.

The drive magnets 531, 532, 533, 534 are driven by a drive coil provided on the upper surface of the movable plate 552 so as to face the drive magnets 531, 532, 533, 534, respectively, to move the movable plate 552. Make up the part.

Further, as shown in FIGS. 8, 9 and 11, position detection magnets 541 are provided at a plurality of locations on the lower surface of the base plate 512 (the surface opposite to the top plate 511).

As shown in FIGS. 8 and 9, the position detection magnet 541 and the Hall element 542 on the DMD substrate 557 provided with the DMD 551 constitute a position detection unit for detecting the position of the DMD 551. The Hall element 542 is an example of a magnetic sensor, and transmits a signal corresponding to a change in the magnetic flux density from the position detection magnet 541 to the drive control unit 12 of the system control unit 10. The drive control unit 12 detects the position of the DMD 551 based on the signal transmitted from the Hall element 542.

The number and position of the columns 515 and the support spheres 521 provided in the fixed unit 51 described above are not limited to the configurations exemplified in the present embodiment as long as the movable plate 552 can be movably supported.

(Movable unit)
FIG. 15 is a perspective view illustrating the movable unit 55 in the first embodiment. Further, FIG. 16 is an exploded perspective view illustrating the movable unit 55 in the first embodiment.

As shown in FIGS. 15 and 16, the movable unit 55 has a movable plate 552 as a movable plate. Further, the movable unit 55 has a coupling plate 555, a heat sink 554, a holding member 555, and a DMD substrate 557 as movable parts. The DMD substrate 557 is provided with the DMD 551.

As described above, the movable plate 552 is provided between the top plate 511 and the base plate 512 of the fixing unit 51, and is movably supported by a plurality of support spheres 521 in a direction parallel to the surface.

FIG. 17 is a perspective view illustrating the movable plate 552 in the embodiment.

As shown in FIG. 17, 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 557, and has a drive coil 581 around the central hole 570. 582,583,584 are provided.

The drive coils 581, 582, 583, 584 are formed by winding electric wires around axes parallel to the Z1Z2 direction, respectively, and are provided in recesses formed on the surface of the movable plate 552 on the top plate 511 side. It is covered with a cover. The drive coils 581, 582, 583, 584, respectively, form a drive unit for moving the movable plate 552 with the drive magnets 531, 532, 533, 534 of the top plate 511, respectively.

The drive magnets 531, 532, 533, 534 of the top plate 511 and the drive coils 581, 582, 583, 584 of the movable plate 552 are positioned so as to face each other with the movable unit 55 supported by the fixed unit 51. It is provided in. When a current is passed through the drive coils 581, 582, 583, 584, the magnetic field formed by the drive magnets 531, 532, 533, 534 generates a Lorentz force, which is a drive force for moving the movable plate 552.

The movable plate 552 receives a Lorentz force as a driving force generated between the driving magnets 531, 532, 533, 534 and the driving coil 581, 582, 583, 584, and receives an XY plane with respect to the fixed unit 51. Displaces in a linear or rotating manner.

The magnitude and direction of the current flowing through each drive coil 581, 582, 583, 584 is controlled by the drive control unit 12 of the system control unit 10. The drive control unit 12 controls the movement (rotation) direction, movement amount, rotation angle, etc. of the movable plate 552 according to the magnitude and direction of the current flowing through each drive coil 581, 582, 583, 584.

In the present embodiment, the drive coil 581 and the drive magnet 531 and the drive coil 584 and the drive magnet 534 are provided as the first drive unit so as to face each other in the X1X2 direction. When a current is passed through the drive coil 581 and the drive coil 584, a Lorentz force in the X1 direction or the X2 direction is generated as shown in FIG. The movable plate 552 moves in the X1 direction or the X2 direction by the Lorentz force generated in the drive coil 581 and the drive magnet 531 and the drive coil 584 and the drive magnet 534.

Further, in the present embodiment, the drive coil 582 and the drive magnet 532 and the drive coil 583 and the drive magnet 533 are provided side by side in the X1X2 direction as the second drive unit, and the drive magnet 532 and the drive magnet are provided. The 533 is arranged so that the drive magnet 531 and the drive magnet 534 are orthogonal to each other in the longitudinal direction. In such a configuration, when a current is passed through the drive coil 582 and the drive coil 583, a Lorentz force in the Y1 direction or the Y2 direction is generated as shown in FIG.

The movable plate 552 moves in the Y1 direction or the Y2 direction by the Lorentz force generated in the drive coil 582 and the drive magnet 532, and the drive coil 583 and the drive magnet 533. Further, the movable plate 552 is displaced so as to rotate in the XY plane by the Lorentz force generated in the opposite directions of the drive coil 582 and the drive magnet 532 and the drive coil 583 and the drive magnet 533.

For example, when a current is passed so that a Lorentz force in the Y1 direction is generated in the drive coil 582 and the drive magnet 532 and a Lorentz force in the Y2 direction is generated in the drive coil 583 and the drive magnet 533, the movable plate 552 is moved. It is displaced so as to rotate clockwise in the top view. Further, when a Lorentz force in the Y2 direction is generated in the drive coil 582 and the drive magnet 532 and a current is passed so as to generate a Lorentz force in the Y1 direction in the drive coil 583 and the drive magnet 533, the movable plate 552 moves. It is displaced so as to rotate counterclockwise when viewed from above.

Further, the movable plate 552 is provided with a movable range limiting hole 571 at a position corresponding to the support column 515 of the fixed unit 51. The movable range limiting hole 571 limits the movable range of the movable plate 552 by contacting the column 515 when the column 515 of the fixing unit 51 is inserted and the movable plate 552 moves significantly due to vibration or some abnormality, for example.

Here, in the present embodiment, the top plate 511 and the base plate 512 are made of a magnetic material and function as a yoke plate to drive magnets 531, 532, 533, 534 and drive coils 581, 582, 583, 584. Consists of a drive unit and a magnetic circuit including.

With such a configuration, the magnetic flux generated in the drive unit is concentrated on the top plate 511 and the base plate 512, and leakage from between the top plate 511 and the base plate 512 to the outside is reduced.

Therefore, in the Hall element 542 provided on the DMD substrate 557 on the lower surface side of the base plate 512, the influence of the magnetic field formed in the drive unit including the drive magnets 531 and 532, 533, 534 and the drive coil is reduced. Therefore, the Hall element 542 can output a signal corresponding to the change in the magnetic flux density of the position detection magnet 541 without being affected by the magnetic field from the drive unit, and the drive control unit 12 can grasp the position of the DMD 551 with high accuracy. Will be.

As described above, the drive control unit 12 can accurately detect the position of the DMD 551 based on the output of the Hall element 542 in which the influence from the drive unit is reduced. Therefore, the drive control unit 12 can control the position of the DMD 551 with high accuracy by controlling the magnitude and direction of the current flowing through the drive coils 581, 582, 583, 584.

The number, position, etc. of the drive magnets 531, 532, 533, 534 and the drive coils 581, 582, 583, 584 as the drive unit can be adjusted as long as the movable plate 552 can be moved to an arbitrary position. The configuration may be different from that of the present embodiment.

For example, the driving magnet may be provided on the base plate 512, and the driving coil may be provided on the surface of the movable plate 552 on the base plate 512 side. Further, the drive magnet may be provided on the movable plate 552, and the drive coil may be provided on the top plate 511 or the base plate 512 so as to face the drive magnet. Further, the position detection magnet may be provided on the DMD substrate 557, and the Hall element 542 may be provided on the lower surface of the base plate 512 so as to face the detection magnet. Further, a drive unit including a drive magnet and a drive coil is provided between the base plate 512 and the DMD substrate 557, and a position detection unit including a position detection magnet and a Hall element is provided between the top plate 511 and the base plate 512. May be good.

However, in any of the configurations, the weight of the movable unit 55 may increase and the position control may become difficult. Therefore, it is preferable that the driving magnet and the position detecting magnet are provided on the top plate 511 or the base plate 512.

Further, the top plate 511 and the base plate 512 may be partially formed of a magnetic material as long as the leakage of magnetic flux from the drive unit to the position detection unit can be reduced. For example, the top plate 511 and the base plate 512 may be formed by laminating a plurality of members including a flat plate-shaped or sheet-shaped member made of a magnetic material. Further, if it is possible to form at least a part of the base plate 512 with a magnetic material to function as a yoke plate and prevent magnetic flux from leaking from the drive unit to the position detection unit, the top plate 511 is formed with a non-magnetic material. You may.

Further, the number, position, shape, and the like of the movable range limiting holes 571 are not limited to the configurations exemplified in this embodiment. For example, the movable range limiting hole 571 may be one or a plurality. Further, the shape of the movable range limiting hole 571 may be a shape different from that of the present embodiment, such as a rectangle or a circle.

As shown in FIG. 15, a coupling plate 553 is fixed to the lower surface side (base plate 512 side) of the movable plate 552 movably supported by the fixing unit 51. The coupling plate 553 is formed of a flat plate-shaped member, has a central hole at a position corresponding to the DMD 551, and a bent portion provided around the coupling plate 553 is fixed to the lower surface of the movable plate 552 by three screws 591. ..

FIG. 18 is a perspective view illustrating the movable unit 55 from which the movable plate 552 has been removed.

As shown in FIG. 18, the coupling plate 553 is provided with a DMD 551 on the upper surface side and a heat sink 554 on the lower surface side. The coupling plate 553 is fixed to the movable plate 552 and is provided so as to be movable with respect to the fixing unit 51 along with the movable plate 552 together with the DMD 551 and the heat sink 554.

The DMD 551 is provided on the DMD substrate 557, and is fixed to the coupling plate 553 by sandwiching the DMD substrate 557 between the holding member 555 and the coupling plate 555. As shown in FIGS. 16 and 18, the holding member 555, the DMD substrate 557, the coupling plate 555, and the heat sink 554 are overlapped and fixed by a step screw 560 as a fixing member and a spring 561 as a pressing means.

FIG. 19 is a diagram illustrating a DMD holding structure of the movable unit 55 according to the first embodiment. FIG. 19 is a side view of the movable unit 55, and the movable plate 552 and the coupling plate 553 are not shown.

As shown in FIG. 19, the heat sink 554 has a protrusion 554a that abuts on the lower surface of the DMD 551 from a through hole provided in the DMD substrate 557 in a state of being fixed to the coupling plate 535. The protruding portion 554a of the heat sink 554 may be provided on the lower surface of the DMD substrate 557 so as to abut at a position corresponding to the DMD 551.

Further, in order to enhance the cooling effect of the DMD 551, an elastically deformable heat transfer sheet may be provided between the protruding portion 554a of the heat sink 554 and the DMD 551. The heat transfer sheet improves the thermal conductivity between the protrusion 554a of the heat sink 554 and the DMD 551, and improves the cooling effect of the DMD 551 by the heat sink 554.

As described above, the holding member 555, the DMD substrate 557, and the heat sink 554 are overlapped and fixed by the stepped screw 560 and the spring 561. When the stepped screw 560 is tightened, the spring 561 is compressed in the Z1Z2 direction, and the force F1 in the Z1 direction shown in FIG. 17 is generated from the spring 561. The force F1 generated from the spring 561 causes the heat sink 554 to be pressed against the DMD 551 by the force F2 in the Z1 direction.

In the present embodiment, the stepped screw 560 and the spring 561 are provided at four positions, and the force F2 applied to the heat sink 554 is equal to the combined force F1 generated by the four springs 561. Further, the force F2 from the heat sink 554 acts on the holding member 555 that holds the DMD substrate 557 on which the DMD 551 is provided. As a result, a reaction force F3 in the Z2 direction corresponding to the force F2 from the heat sink 554 is generated in the holding member 555, and the DMD substrate 557 can be held between the holding member 555 and the coupling plate 555.

A force F4 in the Z2 direction from the force F3 generated on the holding member 555 acts on the stepped screw 560 and the spring 561. Since the springs 561 are provided at four positions, the force F4 acting on each of them corresponds to a quarter of the force F3 generated on the holding member 555 and is balanced with the force F1.

Further, the holding member 555 is a member capable of bending as shown by an arrow B in FIG. 19, and is formed in a leaf spring shape. The holding member 555 is pressed by the protruding portion 554a of the heat sink 554 and bends, and a force is generated that pushes the heat sink 554 back in the Z2 direction, so that the contact between the DMD 551 and the heat sink 554 can be kept stronger.

As described above, in the movable unit 55, the movable plate 552 and the coupling plate 553 having the DMD 551 and the heat sink 554 are movably supported by the fixed unit 51. The position of the movable unit 55 is controlled by the drive control unit 12 of the system control unit 10. Further, the movable unit 55 is provided with a heat sink 554 that abuts on the DMD 551 to prevent problems such as malfunction and failure due to the temperature rise of the DMD 551.

<Image projection>
As described above, in the projector 1 according to the present embodiment, the DMD 551 that generates the projected image is provided in the movable unit 55, and the position is controlled together with the movable unit 55 by the drive control unit 12 of the system control unit 10. ..

For example, the drive control unit 12 moves at high speed between a plurality of positions separated by a distance less than the array spacing of the plurality of micromirrors of the DMD 551 at a predetermined cycle corresponding to the frame rate at the time of image projection. Control the position of. At this time, the image control unit 11 transmits an image signal to the DMD 551 so as to generate a projected image shifted according to each position.

For example, the drive control unit 12 reciprocates the DMD 551 in the X1X2 direction and the Y1Y2 direction at a predetermined cycle between the position P1 and the position P2 separated by a distance less than the arrangement interval of the micromirrors of the DMD551. At this time, the resolution of the projected image can be made about twice the resolution of the DMD 551 by controlling the DMD 551 so that the image control unit 11 generates the projected image shifted according to each position. become. Further, by increasing the moving position of the DMD 551, the resolution of the projected image can be made more than twice that of the DMD 551.

In this way, the drive control unit 12 moves the DMD 551 together with the movable unit 55 at a predetermined cycle, and the image control unit 11 causes the DMD 551 to generate a projected image according to the position, thereby projecting an image having a resolution higher than that of the DMD 551. Will be possible.

Further, in the projector 1 according to the present embodiment, the drive control unit 12 controls the DMD 551 to rotate together with the movable unit 55, so that the projected image can be rotated without being reduced. For example, in a projector such as DMD551 in which an image generation means is fixed, the projected image cannot be rotated while maintaining the aspect ratio unless the projected image is reduced. On the other hand, in the projector 1 according to the present embodiment, since the DMD 551 can be rotated, it is possible to rotate the projected image without reducing it to adjust the tilt and the like.

As described above, in the projector 1 according to the present embodiment, the DMD 551 is configured to be movable, so that the resolution of the projected image can be increased. Further, since the heat sink 554 for cooling the DMD 551 is mounted on the movable unit 55 together with the DMD 551, it comes into contact with the DMD 551 and can be cooled more efficiently, and the temperature rise of the DMD 551 is suppressed. Therefore, in the projector 1, defects such as malfunctions and failures caused by the temperature rise of the DMD 551 are reduced.

Further, in the present embodiment, the top plate 511 and the base plate 512 function as a yoke plate for preventing the leakage of magnetic flux generated in the drive unit including the drive magnet and the drive coil to the outside. Therefore, the Hall element 542 provided on the DMD substrate 557 on the lower surface side of the base plate 512 can output a signal corresponding to the change in the magnetic flux density of the position detection magnet 541 without being affected by the magnetic field generated in the drive unit. It has become. Therefore, the drive control unit 12 can detect the position of the DMD 551 that shifts at high speed based on the output of the Hall element 542 with high accuracy, and can control the position of the DMD 551 with high accuracy.

[Second Embodiment]
Next, the second embodiment will be described with reference to the drawings. The description of the same components as those of the above-described embodiment will be omitted.

FIG. 20 is a perspective view illustrating the image generation unit 70 in the second embodiment. FIG. 21 is an exploded perspective view illustrating the image generation unit 70 in the second embodiment. Further, FIG. 22 is an exploded side view illustrating the image generation unit 70 in the second embodiment. In the illustrated example, the image generation unit 70 is an image forming device in which DMD751 which is an example of the image generation unit is arranged in a movable device.

As shown in FIG. 20, the image generation unit 70 has a fixed unit 71 and a movable unit 72. The fixed unit 71 is fixedly supported by the illumination optical system unit 40 of the projector 1. The movable unit 72 is movably supported by the fixed unit 71.

As shown in FIGS. 20 to 22, the fixing unit 71 has a top plate 711 as a first fixing plate and a base plate 712 as a second fixing plate. The top plate 711 and the base plate 712 are connected by a plurality of columns 731 so as to be parallel to each other through a predetermined gap.

As shown in FIGS. 20 to 22, the movable unit 72 has a movable plate 721 as a movable plate and a heat sink 722 as a movable portion, and is movably supported by the fixed unit 71. A DMD751 is provided on the heat sink 722.

The movable plate 721 is provided between the top plate 711 and the base plate 712 of the fixing unit 71. The movable plate 721 is movably supported by a plurality of support spheres 732 rotatably held on the top plate 711 and the base plate 712, respectively, in the same configuration as in the first embodiment.

The heat sink 722 is fixed to the movable plate 721 with the base plate 712 of the fixing unit 71 sandwiched between them. As shown in FIGS. 20 and 22, the heat sink 722 is provided with a protruding portion 722a projecting upward from the top plate 711. The DMD751 is provided on the upper surface of the protrusion 722a of the heat sink 722.

As shown in FIGS. 21 and 22, a plurality of driving magnets 725 are provided on the surface of the top plate 711 on the movable plate 721 side. Further, as shown in FIG. 21, a plurality of drive coils 726 are provided on the surface of the movable plate 721 on the top plate 711 side so as to face each of the drive magnets 725. The drive magnet 725 and the drive coil 726 form a drive unit for moving the movable plate 721.

When a current is passed through the drive coil 726, the magnetic field formed by the drive magnet 725 generates a Lorentz force that is a drive force for moving the movable plate 721. The movable plate 721 receives the Lorentz force generated between the drive magnet 725 and the drive coil 726, and is displaced with respect to the fixed unit 71 so as to be linear or rotational in the XY plane.

As shown in FIGS. 21 and 22, position detection magnets 741 are provided at a plurality of locations on the lower surface of the base plate 712. Further, a plurality of Hall elements 742 are provided on the upper surface of the heat sink 722 so as to face each of the position detection magnets 741.

The position detection magnet 741 and the Hall element 742 form a position detection unit that detects the position of the DMD 751. The Hall element 742 transmits a signal corresponding to the change in the magnetic flux density from the position detection magnet 741 to the drive control unit 12 of the system control unit 10. The drive control unit 12 detects the position of the DMD 751 based on the signal transmitted from the Hall element 742, and controls the drive unit based on the detection result to move the movable unit 72.

Here, the top plate 711 and the base plate 712 in the present embodiment are formed of a magnetic material such as iron or stainless steel, and function as a yoke plate. The top plate 711 and the base plate 712 are formed of a magnetic material and function as a yoke plate to form a magnetic circuit between the drive magnet 725 and the drive unit including the drive coil 726. With such a configuration, the magnetic flux generated in the drive unit is concentrated on the top plate 711 and the base plate 712, and leakage from between the top plate 711 and the base plate 712 to the outside is reduced.

Therefore, in the Hall element 742 provided on the heat sink 722 on the lower surface side of the base plate 712, the influence of the magnetic field from the drive unit including the drive magnet 725 and the drive coil 724 is reduced. Therefore, the Hall element 742 can output a signal corresponding to the change in the magnetic flux density from the position detection magnet 741 without being affected by the magnetic field from the drive unit, and the drive control unit 12 grasps the position of the DMD 751 with high accuracy. become able to.

As described above, in the image generation unit 70 according to the second embodiment, the influence of the drive unit on the Hall element 742 is reduced, and the position of the DMD 751 can be detected with high accuracy.

The number, position, and the like of the drive magnet 725 and the drive coil 726 as the drive unit may be different from those of the present embodiment as long as the movable unit 72 can be moved to an arbitrary position. .. Further, the drive magnet 725 may be provided on the base plate 712, and the drive coil 726 may be provided on the surface of the movable plate 721 on the base plate 712 side. The driving magnet 725 may be provided on the movable plate 721, and the driving coil 726 may be provided on the top plate 711 or the base plate 712.

Further, the position detection magnet 741 may be provided on the heat sink 722, and the Hall element 742 may be provided on the surface of the base plate 712 on the heat sink 722 side. Further, a drive unit including the drive magnet 725 and the drive coil 726 is provided between the base plate 712 and the heat sink 722, and a position detection unit including the position detection magnet 741 and the Hall element 742 is provided between the top plate 711 and the base plate 712. It may be provided in.

Further, the top plate 711 and the base plate 712 may be partially formed of a magnetic material as long as the leakage of magnetic flux from the drive unit to the position detection unit can be reduced. For example, the top plate 711 and the base plate 712 may be formed by laminating a plurality of members including a flat plate-shaped or sheet-shaped member made of a magnetic material. Further, if it is possible to form at least a part of the base plate 712 with a magnetic material to function as a yoke plate and prevent leakage of magnetic flux from the drive unit to the position detection unit, the top plate 711 is formed of a non-magnetic material. You may.

[Third Embodiment]
Next, the third embodiment will be described with reference to the drawings. The description of the same components as those of the above-described embodiment will be omitted.

FIG. 23 is a perspective view illustrating the image generation unit 80 according to the third embodiment. FIG. 24 is an exploded perspective view illustrating the image generation unit 80 according to the third embodiment. Further, FIG. 25 is an exploded side view illustrating the image generation unit 80 in the third embodiment. In the illustrated example, the image generation unit 80 is an image forming device in which DMD851, which is an example of the image generation unit, is arranged in a movable device.

As shown in FIG. 23, the image generation unit 80 has a fixed unit 81 and a movable unit 82. The fixed unit 81 is fixedly supported by the illumination optical system unit 40 of the projector 1. The movable unit 82 is movably supported by the fixed unit 81. The movable unit 82 may be provided with a heat sink as a heat radiating portion that dissipates and cools the heat of the DMD 851, for example.

As shown in FIGS. 23 to 25, the fixing unit 81 has a base plate 811 as a first fixing plate and a top plate 812 as a second fixing plate. The base plate 811 and the top plate 812 are connected by a plurality of columns 831 so as to be parallel to each other through a predetermined gap.

As shown in FIGS. 23 to 25, the movable unit 82 has a movable plate 821 as a movable plate and a DMD substrate 822 as a movable portion, and is movably supported by the fixed unit 81. A DMD851 is provided on the DMD substrate 822.

The movable plate 821 is provided between the base plate 811 and the top plate 812 of the fixing unit 81. The movable plate 821 is movably supported by a plurality of support spheres 832, which are rotatably held by the base plate 811 and the top plate 812, respectively, in the same configuration as in the first embodiment.

The DMD substrate 822 is fixed to the movable plate 821 with the top plate 812 of the fixing unit 81 sandwiched between them. The DMD851 is provided on the upper surface of the DMD substrate 822.

As shown in FIGS. 24 and 25, a plurality of driving magnets 825 are provided on the surface of the top plate 812 on the movable plate 821 side. Further, as shown in FIG. 24, a plurality of drive coils 826 are provided on the surface of the movable plate 821 on the top plate 812 side so as to face each of the drive magnets 825. The drive magnet 825 and the drive coil 826 form a drive unit for moving the movable unit 82.

When a current is passed through the drive coil 826, the magnetic field formed by the drive magnet 825 generates a Lorentz force that is a drive force for moving the movable unit 82. The movable unit 82 receives the Lorentz force generated between the drive magnet 825 and the drive coil 826, and is displaced with respect to the fixed unit 81 so as to be linear or rotational in the XY plane.

As shown in FIGS. 24 and 25, position detection magnets 841 are provided at a plurality of locations on the upper surface of the top plate 812. Further, a plurality of Hall elements 842 are provided on the lower surface of the DMD substrate 822 so as to face each of the position detection magnets 841.

The position detection magnet 841 and the Hall element 842 constitute a position detection unit that detects the position of the DMD 851. The Hall element 842 transmits a signal corresponding to the change in the magnetic flux density from the position detection magnet 841 to the drive control unit 12 of the system control unit 10. The drive control unit 12 detects the position of the DMD 851 based on the signal transmitted from the Hall element 842, and controls the drive unit based on the detection result to move the movable unit 82.

Here, the base plate 811 and the top plate 812 in the present embodiment are formed of a magnetic material such as iron or stainless steel, function as a yoke plate, and are connected to a drive unit including a drive magnet 825 and a drive coil 826. It constitutes a magnetic circuit. With such a configuration, the magnetic flux generated in the drive unit is concentrated on the base plate 811 and the top plate 812, and leakage from between the base plate 811 and the top plate 812 to the outside is reduced.

Therefore, in the Hall element 842 provided on the DMD substrate 822 on the upper surface side of the top plate 812, the influence of the magnetic field from the drive unit including the drive magnet 825 and the drive coil 824 is reduced. Therefore, the Hall element 842 can output a signal corresponding to the change in the magnetic flux density from the position detection magnet 841 without being affected by the drive unit, and the drive control unit 12 can accurately position the DMD851. You will be able to grasp.

As described above, in the image generation unit 80 according to the third embodiment, the influence of the drive unit on the Hall element 842 is reduced, and the position of the DMD 851 can be detected with high accuracy.

The number, position, etc. of the drive magnet 825 and the drive coil 826 as the drive unit may be different from those of the present embodiment as long as the movable unit 82 can be moved to an arbitrary position. .. Further, the drive magnet 825 may be provided on the base plate 811, and the drive coil 826 may be provided on the surface of the movable plate 821 on the base plate 811 side. Further, the drive magnet 825 may be provided on the movable plate 821, and the drive coil 826 may be provided on the base plate 811 or the top plate 812.

Further, the position detection magnet 841 may be provided on the DMD substrate 822, and the Hall element 842 may be provided on the surface of the top plate 812 on the DMD substrate 822 side. Further, a drive unit including a drive magnet 825 and a drive coil 826 is provided between the DMD substrate 822 and the top plate 812, and a position detection unit including a position detection magnet 841 and a Hall element 842 is provided between the base plate 811 and the top plate 812. It may be provided between.

Further, the base plate 811 and the top plate 812 may be partially formed of a magnetic material as long as the leakage of magnetic flux from the drive unit to the position detection unit can be reduced. For example, the base plate 811 and the top plate 812 may be formed by laminating a plurality of members including a flat plate-shaped or sheet-shaped member made of a magnetic material. Further, if it is possible to form at least a part of the top plate 812 with a magnetic material to function as a yoke plate and prevent magnetic flux from leaking from the drive unit to the position detection unit, the base plate 811 is formed with a non-magnetic material. You may.

[Modification example]
The movable device may have the following configuration. For example, in the first embodiment, first, a plurality of position detection magnets 541 are arranged on the base plate 512 side of the top plate 511 instead of the driving magnets 531, 532, 533, and 534. On the other hand, on the top plate 511 side of the movable plate 552, a plurality of Hall elements 542 are arranged in place of the drive coils 581, 582, 583 and 584.

Then, on the DMD substrate 557 side of the base plate 512, drive magnets 531, 532, 533 and 534 are arranged in place of the plurality of position detection magnets 541. On the other hand, drive coils 581, 582, 583 and 584 are arranged on the base plate 512 side of the DMD substrate 557 instead of the plurality of Hall elements 542. The movable device may have the above configuration.

Further, in the second embodiment, a plurality of position detection magnets 741 are arranged on the base plate 712 side of the top plate 711 instead of the plurality of drive magnets 725. On the other hand, on the top plate 711 side of the movable plate 721, a plurality of Hall elements 742 are arranged in place of the plurality of drive coils 726.

Then, on the heat sink 722 side of the base plate 712, a plurality of drive magnets 725 are arranged in place of the plurality of position detection magnets 741. On the other hand, on the base plate 712 side of the heat sink 722, a plurality of drive coils 726 are arranged instead of the plurality of Hall elements 742. The movable device may have the above configuration.

Furthermore, in the third embodiment, a plurality of position detection magnets 841 are arranged on the base plate 811 side of the top plate 812 instead of the plurality of drive magnets 825. On the other hand, on the top plate 812 side of the movable plate 821, a plurality of Hall elements 842 are arranged in place of the plurality of drive coils 826.

Then, on the DMD substrate 822 side of the top plate 812, a plurality of drive magnets 825 are arranged in place of the plurality of position detection magnets 841. On the other hand, on the base plate 811 side of the DMD substrate 822, a plurality of drive coils 826 are arranged instead of the plurality of Hall elements 842. The movable device may have the above configuration.

In addition, in each embodiment, the pair of the driving force generating mechanism such as the driving magnet and the driving coil, which is the first pair example, may be arranged so as to face each other, and may be arranged in the opposite direction to the arrangement described. Good.

Similarly, the pair of the position detection mechanism such as the position detection magnet and the Hall element, which is an example of the second pair, may be arranged so as to face each other, and may be arranged in the opposite direction to the arrangement described.

Specifically, in the third embodiment, first, a plurality of drive coils 826 are arranged on the base plate 811 side of the top plate 812 instead of the plurality of drive magnets 825. On the other hand, on the top plate 812 side of the movable plate 821, a plurality of drive magnets 825 are arranged instead of the plurality of drive coils 826. Further, on the DMD substrate 822 side of the top plate 812, a plurality of Hall elements 842 are arranged in place of the plurality of position detection magnets 841. Further, on the base plate 811 side of the DMD substrate 822, a plurality of position detection magnets 841 may be arranged instead of the plurality of Hall elements 842.

That is, the movable device is provided with either a first pair or a second pair between the second fixing plate and the movable portion. Then, a pair different from the pair provided between the second fixing plate and the movable portion is provided between the movable plate and the fixing unit.

Specifically, when the position detection magnet is provided on the second fixing plate, a magnetic sensor is provided on the movable portion that is in the opposite arrangement position. In this way, first, a second pair is provided between the second fixing plate and the movable portion. Then, a driving magnet is provided on the first fixing plate. Then, the drive coil is arranged on the movable plate which is positioned so as to face the drive magnet. In this way, the first pair is provided between the movable plate and the fixed unit.

Further, when the second pair is provided between the second fixing plate and the movable portion, the first pair may be provided between the movable plate and the second fixing plate. Specifically, a drive coil is provided on the movable plate. Then, a driving magnet is provided on the second fixing plate.

On the other hand, the first pair may be provided between the second fixing plate and the movable portion. In this case, a second pair is provided between the first fixing plate and the movable plate or between the movable plate and the second fixing plate.

Although the movable device, the image projection system, the image generation device, and the image projection device according to the embodiment have been described above, the present invention is not limited to the above embodiment, and various modifications and improvements are made within the scope of the present invention. Is possible.

1 Projector (image projection device)
10 System control unit 100 Movable device 11 Image control unit 12 Drive control unit 30 Light source 40 Illumination optical system unit 50, 70, 80 Image generation unit (image generation device)
51, 71, 81 Fixed unit 55, 72, 82 Movable unit 60 Projection optical system unit (projection unit)
511 and 711 Top plate (first fixing plate)
512,712 base plate (second fixing plate)
531,532,533,534,725,825 Drive magnet 541,741,841 Position detection magnet 581,582,583,584,726,826 Drive coil 542,742,842 Hall element (magnetic sensor)
551,751,851 DMD (image generator)
552,721,821 Movable plate (Movable plate)
554 heat sink (heat dissipation part)
557,822 DMD board (moving part)
722 Heat sink (moving part)
811 base plate (first fixing plate)
812 Top plate (second fixing plate)

Japanese Unexamined Patent Publication No. 2004-180011

Claims (9)

A fixing unit including a first fixing plate and a second fixing plate made of a magnetic material,
A movable unit including a movable plate movably supported between the first fixing plate and the second fixing plate, and a movable portion fixed to the movable plate with the second fixing plate sandwiched between them. When,
Either the fixed unit and the first pair serving as the driving force generating mechanism or the second pair serving as the position detecting mechanism are arranged so as to face the movable plate.
The fixed unit and the first pair or the second pair arranged to face the movable portion,
It has an image generation unit provided in the movable unit, and has
The movable portion has a connecting plate fixed to the movable plate, and has a connecting plate.
The image generator and the connecting plate are overlapped and fixed.
An image generator characterized by this . The first pair is provided between the first fixing plate and the movable plate or between the movable plate and the second fixing plate.
The image generation device according to claim 1, wherein the second pair is provided between the second fixing plate and the movable portion. The second pair is a position detection magnet and a magnetic sensor.
The position detection magnet is provided on the second fixing plate and is provided on the second fixing plate.
The image generation device according to claim 2, wherein the magnetic sensor is provided in the movable portion. The first pair is a driving magnet and a driving coil.
The driving magnet is provided on the first fixing plate or the second fixing plate.
The image generation device according to claim 2 or 3, wherein the drive coil is provided on the movable plate. The image generating apparatus according to any one of claims 2 to 4, wherein the first fixing plate is formed of at least a part of a magnetic material. The second pair is provided between the first fixing plate and the movable plate or between the movable plate and the second fixing plate.
The image generation device according to claim 1, wherein the first pair is provided between the second fixing plate and the movable portion. The image generating apparatus according to any one of claims 1 to 6, wherein the movable portion has a heat radiating portion that dissipates heat from the image generating portion. The image generation unit has a plurality of mirrors arranged in a grid pattern.
The drive unit that moves the movable unit and
The invention according to any one of claims 1 to 7, wherein the drive control unit controls the drive unit so as to move a distance less than the arrangement interval of the plurality of mirrors in a predetermined cycle. Image generator. The image generator according to any one of claims 1 to 8 .
An image projection device comprising a projection unit for projecting an image generated by the image generation unit.