JP5370176B2 - Projector system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector system which moves a projection image while suppressing reduction in resolution without moving a projector. <P>SOLUTION: The projector system 10 includes: the projector 1 that modulates luminous flux emitted from a light source in accordance with image information to form image light, and projects the image light; and a reflection device 2 that reflects the image light. The reflection device 2 includes: a first reflection mirror 21 and a second reflection mirror 22 that are arranged to be opposed to each other and successively reflect the image light emitted from the projector 1; a first driving part 24 which integrally rotates the first reflection mirror 21 and the second reflection mirror 22 centering a first axis of rotation J1 formed on a virtual plane crossing a plane along the reflection surface of each of the first reflection mirror 21 and the second reflection mirror 22, and including the normals of the reflection surfaces; and a second driving part 25 which rotates the second reflection mirror 22 centering a second axis of rotation J2 orthogonal to the first axis of rotation J1. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a projector that projects image light, and a projector system that includes an apparatus that reflects image light emitted from the projector.

  2. Description of the Related Art Conventionally, there has been known a projector that modulates a light beam emitted from a light source according to image information to form image light and projects the image light with a projection lens. In addition to the projector, there has been proposed a projector system that includes a reflection device that reflects a light beam and is configured to change the direction of image light projected from the projector (hereinafter referred to as “projection light”) (for example, Patent Document 1).

  A projector system (moving projector system) described in Patent Document 1 includes a projector and a movable reflecting mirror (reflecting mirror), and image light emitted from the projector is projected onto a screen or the like by rotating the reflecting mirror. The projected image can be moved.

  As one example thereof, a projector system including a drive device that rotates a reflecting mirror and a control device that has an image rotation circuit is disclosed. This projector system is configured such that a projected image moves when a reflecting mirror is rotated in a pan direction and a tilt direction. When the reflection mirror is rotated in the pan direction, the projection image is rotated, and thus the image is rotated by the video rotation circuit.

  As another embodiment, a drive system that rotates a reflecting mirror in the tilt direction and a projector system that includes a turntable that rotates the projector are disclosed. This projector system is configured to move the projected image in the tilt direction by rotating the reflecting mirror, and to move the projected image in the pan direction by rotating the turntable.

JP-A-9-149296

  However, the projector system described in Patent Document 1 has the following problems. That is, in the projector system in one embodiment, when the mirror is rotated in the pan direction, the projected image is rotated in addition to being distorted in a trapezoidal shape. The number of pixels that are invalid for correcting the image becomes larger. That is, there is a problem that the resolution is lowered.

  In the other embodiment, since the projector is rotated, the inertia is large and the projector is not suitable for the operation of moving the projected image smoothly. There is a risk of deterioration. In addition, in order to ensure the connection reliability of video signals and cables for power supply, there is a problem that the structure becomes complicated or the use of special connection parts is considered, and the device becomes large or expensive. is there.

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

  Application Example 1 A projector system according to this application example modulates a light beam emitted from a light source according to image information to form image light, projects the image light, and reflects the image light. A first reflection mirror and a second reflection mirror that are arranged opposite to each other and sequentially reflect the image light emitted from the projector, the first reflection mirror, and the reflection device. The first reflecting mirror and the second centering on a first rotation axis that intersects with a plane along each reflecting surface of the second reflecting mirror and is formed on a virtual plane including a normal line of each reflecting surface. At least one of the first reflecting mirror and the second reflecting mirror around a first driving unit that integrally rotates the reflecting mirror and a second rotating axis that is orthogonal to the first rotating axis. A second driving unit for rotating the person, characterized in that it comprises a.

  According to this configuration, the projector system sequentially reflects the image light (projection light) emitted from the projector by the reflection device by the first reflection mirror and the second reflection mirror, and displays the image light on the projection surface such as a screen as a projection image. be able to. The first reflection mirror and the second reflection mirror are configured to be rotatable about the first rotation axis, and at least one of the first reflection mirror and the second reflection mirror is orthogonal to the first rotation axis. It is configured to be rotatable about the second rotation axis. That is, the first reflecting mirror and the second reflecting mirror are rotated in the first direction while maintaining an angle formed between them, and at least one of the first reflecting mirror and the second reflecting mirror is orthogonal to the first direction so that the angle formed between each other can be changed. It is configured to be able to rotate in the second direction.

  Accordingly, the reflection device can change the direction in which the projection light is reflected in the two directions and move the projection image projected on the projection plane in a state where the projector is fixed. For example, the projection image is moved in the horizontal direction by rotating the first reflection mirror and the second reflection mirror in the first direction with respect to the projection plane arranged along the vertical direction, or the second reflection mirror is moved to the second direction. The projected image can be moved in the vertical direction by rotating in the direction.

  In addition, when the first reflecting mirror and the second reflecting mirror are rotated in the first direction, the optical axis of the projection light whose reflection direction is changed is inclined with respect to the normal line of the projection plane. Although displayed as an image distorted in a trapezoidal shape or a rhombus shape, the rotation of the image is suppressed. In other words, the first reflection mirror and the second reflection mirror sequentially reflect the projection light, so that the projection light can be reflected in the second direction without being affected by the change in the incident angle due to the rotation. Therefore, image rotation is suppressed. Therefore, the projector system can reduce the correction amount for correcting the image distortion when the projected image is moved, and effectively uses the pixel area of the image forming unit for forming the image light provided in the projector. be able to. Therefore, the projector system can move the projected image projected on the projection surface while moving the projector without moving the projector.

  Application Example 2 In the projector system according to the application example, the projector and the reflection device are arranged such that an optical axis of the image light emitted from the projector is positioned on the virtual plane. Is preferred.

  In the projected image, the greater the amount by which the first reflecting mirror and the second reflecting mirror are rotated around the first rotation axis, that is, the optical axis of the projection light reflected by the second reflecting mirror with respect to the normal line of the projection plane ( Hereinafter, the amount of distortion increases as the angle of the “reflection optical axis” increases. According to this configuration, since the optical axis of the projection light and the first rotation axis are located on the virtual plane, the reflected optical axis is also located on this virtual plane. As a result, the moving projected image has a symmetrical shape in which the first reflection mirror and the second reflection mirror are distorted in one direction and the other direction in which the first reflection mirror is rotated about the first rotation axis. Therefore, compared to a configuration in which the optical axis of the projection light is not located on the virtual plane, it is possible to move the projection image with a small amount of image distortion correction, that is, a higher-resolution projection image by effectively using the size of the projection plane. Become.

  Application Example 3 In the projector system according to the application example described above, it is preferable that the projector system further includes a third reflection mirror that reflects the image light on an upstream side of the first reflection mirror.

  According to this configuration, since the projector system includes the third reflection mirror, the direction of the projection light can be changed by the third reflection mirror and then moved by the reflection device. For example, you can display and move the projected image on a projection surface placed on a desk or floor with the projector system installed on the ceiling, or display the projected image on the ceiling with the projector system installed on the floor or desk. Or move. Therefore, it is possible to provide a projector system with a wider range of uses.

  Application Example 4 In the projector system according to the application example, it is preferable that the projector system further includes an image correction unit that corrects an image corresponding to the position of the first reflection mirror and the second reflection mirror.

  According to this configuration, the projector system includes the image correction unit, and the image correction unit corrects the image corresponding to the positions of the first reflection mirror and the second reflection mirror. Accordingly, it is possible to correct the distortion of the projected image that is moved by the rotation of the first reflection mirror and the second reflection mirror without performing a specific operation. Therefore, the convenience of the projector system can be improved.

FIG. 2 is a perspective view schematically showing the projector system of the first embodiment. 1 is a block diagram showing a schematic configuration of a projector system according to a first embodiment. FIG. 3 is a perspective view schematically showing the reflecting device of the first embodiment. The schematic diagram which looked at the reflective surface in the reflective apparatus of 1st Embodiment from the right side. The schematic diagram which looked at the 2nd reflective mirror in the reflective apparatus of 1st Embodiment from upper direction. FIG. 3 is a schematic diagram showing a projected image projected by the projector system of the first embodiment. The schematic diagram which shows the movable mirror with which the reflection apparatus in the conventional projector system was equipped. The figure which shows typically the reflective surface of the conventional movable mirror. The schematic diagram which shows the projection image projected with the conventional projector system. The schematic diagram of the reflective surface in the reflective apparatus of 1st Embodiment. The schematic diagram which looked at the 1st reflective mirror and the 2nd reflective mirror in the reflective apparatus of 1st Embodiment from the right side. FIG. 3 is a schematic diagram showing a projected image projected by the projector system of the first embodiment. FIG. 3 is a schematic diagram showing a projected image projected by the projector system of the first embodiment. The perspective view which shows typically the projector system of 2nd Embodiment.

(First embodiment)
Hereinafter, the projector system according to the first embodiment will be described with reference to the drawings. FIG. 1 is a perspective view schematically showing a projector system 10 of the present embodiment.
As shown in FIG. 1, the projector system 10 includes a projector 1 and a reflection device 2, and the image light (projection light PL) emitted from the projector 1 is reflected by the reflection device 2 and is projected onto a projection surface SC such as a screen. The projected image 7 is displayed. Then, the projector system 10 moves the projected image 7 when the reflecting device 2 is driven.

[Main components of the projector]
First, the projector 1 will be described. The projector 1 modulates a light beam emitted from a light source according to image information to form image light, and projects the image light.
FIG. 2 is a block diagram illustrating a schematic configuration of the projector system 10.
As shown in FIG. 2, the projector 1 includes a light source unit 11, a liquid crystal light valve 12 as an image forming unit, a projection optical unit 13, an image input unit 14, an image processing unit 15, an image correction unit 16, an operation unit 17, and a mirror. A position input unit 18 and a control unit 19 are provided.

  The light source unit 11 has a discharge-type light source such as an extra-high pressure mercury lamp or a metal halide lamp. Then, after the light beam emitted from the light source unit 11 is separated into three color lights of red (R), green (G), and B (blue) which are three primary colors of light by a light separation optical system (not shown), The liquid crystal light valve 12 is provided for each color light (the liquid crystal light valve for R light is 12R, the liquid crystal light valve for G light is 12G, and the liquid crystal light valve for B light is 12B).

  The image input unit 14 includes various connection terminals for connecting to an external image supply device IS via a cable, such as a PC (Personal Computer) or a DVD (Digital Versatile Disc) playback device, and is input from the image supply device IS. The processed image signal is output to the image processing unit 15.

  The image processing unit 15 generates a display image signal by processing the image signal from the image input unit 14 so that the display state of the image such as contrast and sharpness becomes a desired state, and outputs the display image signal to the image correction unit 16. .

  The operation unit 17 includes a plurality of keys for performing various instructions such as a menu key for switching display / non-display of a menu image for performing various settings of the projector 1 and a source switching key for switching an input source.

  The mirror position input unit 18 includes a connection terminal for connecting to the reflection device 2 via a cable, and corresponds to the positions of a first reflection mirror 21 and a second reflection mirror 22 (described later) input from the reflection device 2. The position signal is output to the control unit 19.

  The control unit 19 includes a CPU (Central Processing Unit), a ROM (Read Only Memory) composed of a flash memory, a RAM (Random Access Memory) used for temporary storage of various data, etc. (none of which are shown), and a computer It functions as. The control unit 19 performs overall control of the operation of the projector 1 by the CPU operating according to a control program stored in the ROM.

  The image correction unit 16 corrects images corresponding to the positions of the first reflection mirror 21 and the second reflection mirror 22. Specifically, the image correction unit 16 receives an instruction from the control unit 19, corrects the image corresponding to the position signal from the reflection device 2 on the display image signal output from the image processing unit 15, The corrected display image signal is output to the liquid crystal light valve 12. The image correction unit 16 can also correct an image based on an instruction from the operation unit 17.

  The liquid crystal light valve 12 modulates incident color light based on the display image signal input from the image correction unit 16. Specifically, the liquid crystal light valve 12 has a rectangular pixel region in which minute pixels (not shown) are formed in a matrix. When the display image signal from the image correction unit 16 is input, the liquid crystal light valve 12 sets each pixel to a light transmittance corresponding to the display image signal, and forms a display image in the pixel region.

When the image is not corrected, the liquid crystal light valve 12 forms a display image in the entire pixel area based on the display image signal input from the image correction unit 16. On the other hand, when image correction is performed, the liquid crystal light valve 12 is based on a display image signal input from the image correction unit 16, and a pixel area that does not contribute to display (hereinafter referred to as “non-display area”). Is formed).
The modulated color lights are combined for each pixel by a light combining optical system (not shown) to form image light representing a color image, and are emitted to the projection optical unit 13.

  The projection optical unit 13 is configured as a combined lens in which a plurality of lenses are combined, and enlarges and projects the image light emitted from the light combining optical system. The image light (projection light PL) emitted from the projection optical unit 13 is emitted to the reflection device 2. Note that the projection optical unit 13 includes a mechanism for adjusting the focus of the projected image 7 and a mechanism for adjusting the zoom (both not shown).

[Configuration of Reflector]
Next, the reflection device 2 will be described.
The reflection device 2 reflects the image light (projection light PL) emitted from the projector 1 and displays it as a projection image 7 on a projection surface SC such as a screen.
FIG. 3 is a perspective view schematically showing the reflecting device 2.
As shown in FIGS. 2 and 3, the reflection device 2 includes a first reflection mirror 21, a second reflection mirror 22, a mirror support mechanism 23, a first drive unit 24, a second drive unit 25, a reception unit 26, and a control unit. 27, and a mirror position output unit 28. As shown in FIG. 3, the mirror support mechanism 23 includes a base portion 231, a turntable 232, and a frame 233.

  In the reflection device 2, the first reflection mirror 21 and the second reflection mirror 22 sequentially reflect the projection light PL, and the projection image 7 is displayed on the projection surface SC. In the reflecting device 2, the optical axis (reflected optical axis LB) of the projection light PL reflected by the second reflecting mirror 22 is substantially parallel to the normal NV (see FIG. 5) of the projection surface SC. As a reference state, when the first reflection mirror 21 and the second reflection mirror 22 are rotated, the angle of the reflection optical axis LB with respect to the normal NV is changed, and the position of the projected image 7 is moved. The projector system 10 and the projection surface SC of the present embodiment are set so that the projected image 7 is displayed at a substantially central portion of the projection surface SC in the reference state.

  The reflecting device 2 shown in FIGS. 1 and 3 shows a reference state, and hereinafter, for convenience of explanation, the direction of the image light (projection light PL) emitted from the projector 1 is the rear (−Y direction). The direction in which the projection light PL is reflected by the first reflecting mirror 21 is described as upward (+ Z direction), perpendicular to the Y direction and Z direction, and the right side in the drawing view of FIG. 3 is described as the right side (+ X direction). Further, as shown in FIG. 3, when viewed from above (+ Z direction), the clockwise rotation direction is 1CW direction, and the counterclockwise rotation direction is 1CCW direction, and in the reference state, viewed from the right (+ X direction). The clockwise rotation direction is described as 2CW direction, and the counterclockwise rotation direction is described as 2CCW direction.

  The first reflecting mirror 21 has a rectangular reflecting surface 21A configured such that a film made of aluminum or the like is formed on a glass plate material and efficiently reflects a light beam, and the outer periphery is held by a synthetic resin member. Has been. The first reflecting mirror 21 has a reflecting surface 21A having an angle of about 45 ° with respect to the XY plane so that the projection light PL is reflected upward (+ Z direction), and the turntable of the mirror support mechanism 23. 232 is fixed.

  Similar to the first reflection mirror 21, the second reflection mirror 22 includes a glass plate material and a synthetic resin member that holds the outer periphery, and is formed with a rectangular reflection surface 22 </ b> A that efficiently reflects a light beam. ing. The second reflecting mirror 22 is disposed above the first reflecting mirror 21 (+ Z direction) so that the reflecting surface 22A faces the reflecting surface 21A of the first reflecting mirror 21, and is rotatably supported by the frame 233. The

  Specifically, in the reference state, the second reflecting mirror 22 is disposed such that the reflecting surface 22A is orthogonal to the reflecting surface 21A, and is supported so that the angle of the reflecting surface 22A with respect to the reflecting surface 21A can be changed. The second reflecting mirror 22 reflects the projection light PL reflected by the first reflecting mirror 21 forward (+ Y direction). The first reflecting mirror 21 and the second reflecting mirror 22 are not limited to glass, and may be configured such that a metal film is formed by plating or the like on a synthetic resin member or the like.

As described above, the mirror support mechanism 23 includes the base portion 231, the turntable 232, and the frame 233.
The base portion 231 is a member that supports the entire reflection device 2 and abuts on the installation surface when the reflection device 2 is installed.

  The turntable 232 is rotatably supported with respect to the base portion 231. Specifically, the turntable 232 is disposed above the base portion 231 (+ Z direction), and is configured to be rotatable around a first rotation axis J1 extending in the Z direction. That is, the turntable 232 is rotatable in the 1CW direction and the 1CCW direction with respect to the base portion 231. The first rotation axis J1 is formed on a virtual plane VS that intersects the planes along the reflecting surfaces 21A and 22A and includes the normal lines of the reflecting surfaces 21A and 22A.

  A pair of frames 233 protrude upward from the turntable 232 and are provided with a pair of first reflection mirrors 21 therebetween. The frame 233 supports both side surfaces of the second reflection mirror 22, and the second reflection mirror 22 is configured to be rotatable about a second rotation axis J2 orthogonal to the virtual plane VS. That is, the first rotation axis J1 and the second rotation axis J2 are orthogonal to each other, and the second reflection mirror 22 is rotatable in the 2CW direction and the 2CCW direction in the reference state.

  The first drive unit 24 is disposed above the base unit 231, includes a train wheel unit having a stepping motor, gears, and the like (not shown), and rotates the turntable 232 based on the control of the control unit 27. That is, the first drive unit 24 integrally rotates the first reflection mirror 21 fixed to the turntable 232 and the second reflection mirror 22 supported by the frame 233 around the first rotation axis J1. Let

  The second drive unit 25 is disposed on the side of the frame 233, and includes a train wheel unit having a stepping motor, a gear, and the like (not shown). The second drive unit 25 performs second reflection around the second rotation axis J2 based on the control of the control unit 27. The mirror 22 is rotated.

  The receiving unit 26 receives an operation signal transmitted from the remote controller and transmits the operation signal to the control unit 27, and includes a light receiving element, a decoder (both not shown), and the like. The receiving unit 26 receives an optical signal by a light receiving element and converts it into an electric signal, and then demodulates the signal by a decoder and outputs the demodulated signal to the control unit 27.

  The control unit 27 includes a CPU (Central Processing Unit), a ROM (Read Only Memory) including a flash memory, a RAM (Random Access Memory) used for temporary storage of various data, and the like (all not shown). The control unit 27 controls the operation of the first drive unit 24 and the second drive unit 25 based on the signal from the reception unit 26 and corresponds to the positions of the first reflection mirror 21 and the second reflection mirror 22. The signal is output to the mirror position output unit 28.

  The mirror position output unit 28 includes a connection terminal, and outputs the position signal output from the control unit 27 to the mirror position input unit 18 of the projector 1 via a cable.

  The projector 1 and the reflection device 2 are arranged so that the optical axis LA of the projection light PL is located on the virtual plane VS. The reflected optical axis LB is positioned on the virtual plane VS because the optical axis LA and the first rotation axis J1 are positioned on the virtual plane VS. Then, the projector system 10 displays the projection image 7 on the projection surface SC, and moves the projection image 7 in the vertical and horizontal directions when the reflecting device 2 is driven.

[Path of projection light reflected by the reflector]
The path of the projection light PL reflected by the reflection device 2 will be described.
FIG. 4 is a schematic view of the reflecting surfaces 21A and 22A in the reflecting device 2 as viewed from the right. Specifically, FIG. 4 is a diagram illustrating a state B (the reflecting surface 22A is indicated by a solid line) in which the second reflecting mirror 22 is rotated by an angle α in the 2CCW direction from the state A (the reflecting surface 22A is indicated by a two-dot chain line). It is.

  As shown in FIG. 4, in the state A, the incident angle of the projection light PL (PL10) incident on the reflecting surface 21A is θ, and the incident angle of the projection light PL (PL20) incident on the reflecting surface 22A is φ. Then, since the reflection angles of the projection lights PL10 and PL20 on the reflection surfaces 21A and 22A are θ and φ, respectively, the projection light PL (referred to as PL30) reflected by the reflection surface 22A is an angle (“emission”). The angle λ ”is λ = 2 × θ + 2 × φ.

  In the state A, when the reflecting surface 21A and the reflecting surface 22A are arranged so as to be orthogonal to each other, λ = 180 ° because θ + φ = 90 °. That is, the difference in angle between the traveling direction of the projection light PL10 incident on the first reflection mirror 21 and the traveling direction of the projection light PL30 reflected by the second reflection mirror 22 is zero when viewed from the right. That is, the projection light PL incident on the first reflection mirror 21 is reflected by the so-called retroreflection so that it is sequentially reflected by the first reflection mirror 21 and the second reflection mirror 22 and returns to the original direction.

  On the other hand, in the state B in which the second reflecting mirror 22 is rotated by the angle α in the 2CCW direction from the state A, the projection light PL (PL40) reflected by the reflecting surface 22A has an emission angle of λ = 2θ + 2 × (φ + α ) Since θ + φ = 90 °, the emission angle is λ = 180 ° + 2 × α. That is, the direction of the projection light PL40 is set by the angle formed by the reflection surface 21A and the reflection surface 22A regardless of the incident angles θ and φ of the projection light PL10 and 20.

  In the reflection device 2, the incident angles θ and φ of the projection lights PL10 and 20 change when the first reflection mirror 21 and the second reflection mirror 22 are rotated in the left-right direction, but are reflected by the second reflection mirror 22. As described above, the projection light PL is reflected toward the projection surface SC without being affected by changes in the incident angles θ and φ. That is, the image displayed on the projection screen SC is not distorted due to changes in the incident angles θ and φ in the vertical direction.

The operation of the projector system 10 will be described in detail.
[Operation when the first drive unit is driven]
First, the operation of the projector system 10 when the first drive unit 24 is driven will be described.
FIG. 5 is a schematic view of the second reflection mirror 22 in the reflection device 2 as viewed from above (+ Z direction). FIG. 6 is a schematic diagram showing a projected image 7 projected by the projector system 10.

  In the reference state, the reflection device 2 has the reflected optical axis LB substantially parallel to the normal line NV of the projection surface SC as shown in FIG. The projected image 7 in the reference state is an image projected by image light formed in the entire pixel area of the liquid crystal light valve 12, and as shown in FIG. 6, the lower side and the upper side are formed at the center of the projection surface SC. Are displayed in a rectangular shape along the X direction.

  In the reflection device 2, the first reflection mirror 21 and the second reflection mirror 22 rotate around the first rotation axis J <b> 1 when the first drive unit 24 is driven based on an instruction from the control unit 27. The projected image 7 moves in the left-right direction (± X direction) according to the rotation of the first reflection mirror 21 and the second reflection mirror 22.

Specifically, when the receiving unit 26 receives an operation signal for moving the projected image 7 in the left direction, the control unit 27 outputs a driving signal corresponding to the signal to the first driving unit 24 and also outputs the driving signal to the driving signal. The position signal based on this is output to the mirror position output unit 28.
The first drive unit 24 rotates the stepping motor in response to the drive signal from the control unit 27 and rotates the rotary table 232, that is, the first reflection mirror 21 and the second reflection mirror 22 in the 1 CCW direction from the reference state.

When the first reflection mirror 21 and the second reflection mirror 22 are rotated in the 1 CCW direction from the reference state, the projection light PL reflected by the second reflection mirror 22 is rotated by the first reflection mirror 21 and the second reflection mirror 22. Injected with a rotation angle twice as large as the rotation angle. Specifically, when the first reflecting mirror 21 and the second reflecting mirror 22 are rotated by θ _L / 2, the projection light PL reflected by the second reflecting mirror 22 is reflected by the reflected light axis LB as shown in FIG. Is inclined to the left with an angle θ _L from a state substantially parallel to the normal line NV of the projection surface SC. As shown in FIG. 6, an image 71 having a trapezoidal distortion is generated on the left side (−X side) of the projection surface SC by the projection light PL inclined to the left. The distortion is corrected, and the lower side and the upper side are displayed as a rectangular projection image 7L along the X direction.

The image distortion is corrected by the following procedure.
That is, the position signal output from the control unit 27 to the mirror position output unit 28 uses the positions of the first reflection mirror 21 and the second reflection mirror 22 in the reference state as initial values and the initial value from the signal for rotating the stepping motor. A movement amount with respect to the value is calculated and generated.

  When a position signal is input from the mirror position output unit 28 to the mirror position input unit 18, the control unit 19 of the projector 1 instructs the image correction unit 16 to correct the image. The image correction unit 16 corrects an image corresponding to the position signal input to the mirror position input unit 18 and outputs the corrected display image signal to the liquid crystal light valve 12. That is, in the liquid crystal light valve 12, a non-display area (a pixel area corresponding to the hatched area in FIG. 6) is formed by the image correcting unit 16 to correct image distortion.

  Further, in the projected image 7, the larger the amount that the first reflecting mirror 21 and the second reflecting mirror 22 are rotated around the first rotation axis J1 from the reference state, that is, the angle of the reflected light axis LB with respect to the normal NV is increased. Since the distortion increases as the value increases, the amount of image distortion correction increases. That is, the ineffective area of the liquid crystal light valve 12 increases as the projected image 7 is moved from the center of the projection surface SC toward the left end and the right end.

Similarly, the first reflection mirror 21 and the second reflection mirror 22 perform the first drive based on an instruction from the control unit 27 when the receiving unit 26 receives an operation signal for moving the projected image 7 in the right direction from the reference state. The unit 24 is driven and rotated in the 1 CW direction from the reference state as shown in FIG. Then, the projection light PL reflected by the second reflection mirror 22 is tilted to the right with an angle θ _R from a state in which the reflection optical axis LB is substantially parallel to the normal line NV of the projection plane SC.

As shown in FIG. 6, an image 72 having a trapezoidal distortion is generated on the right side (+ X side) of the projection surface SC by the projection light PL inclined rightward. The lower side and the upper side are displayed as a rectangular projection image 7R along the X direction.
In this way, the projected image 7 moves in the left-right direction when the first drive unit 24 is driven, and image distortion due to the movement is corrected by the image correction unit 16.

[Comparison with conventional projector systems]
Here, distortion of the image when the projected image 7 is moved in the left-right direction (± X direction) will be described in comparison with a conventional projector system.
7 to 9 are diagrams for explaining a conventional projector system. Specifically, FIG. 7 is a schematic diagram showing the movable mirror 102 provided in the reflection device 101 in the conventional projector system. FIGS. 8A and 8B are diagrams schematically showing the reflecting surface 103 of the movable mirror 102 in the reflecting device 101, where FIG. 8A is a diagram seen from the rear, and FIG. 8B is a diagram seen from the right. FIG. 9 is a schematic diagram showing a projected image 8 projected by a conventional projector system. Note that the directions described in FIGS. 7 to 9 are the same as the directions with respect to the projection surface SC of the present embodiment.

  As shown in FIG. 7, the movable mirror 102 is configured to be rotatable about a rotation axis J3 extending in the vertical direction (± Z direction) and a rotation axis J4 extending in the horizontal direction (± X direction). In the reflecting device 101, the movable mirror 102 reflects the projection light PL incident from below (−Z direction) toward the projection surface SC arranged in the front (+ Y direction).

  The movable mirror 102 moves the projected image 8 in the left-right direction when rotated about the rotation axis J3, and moves the projected image 8 in the up-down direction when rotated about the rotation axis J4. FIG. 7 is a diagram illustrating a reference state in which the reflection optical axis LB of the projection light PL reflected by the reflection device 101 is substantially parallel to the normal line NV of the projection plane SC.

  The reflection surface 103 is formed in a rectangular shape, and in the reference state, as shown in FIG. 8A, when viewed from the rear, the upper and lower sides are along the left-right direction, and the right side (right side 103R) and the left side The side (left side 103L) is arranged along the vertical direction. Then, as shown in FIG. 8B, the reflecting surface 103 is arranged so that the right side 103R and the left side 103L overlap in the reference state when viewed from the right side.

  By the way, the projection light PL spreads in a quadrangular pyramid shape as it is separated from the projector 1, and as shown in FIG. 7, the projection light PL1 serving as the rear (−Y side) edge and the front (+ Y side) edge. The projection light PL2 is a part. Here, the distortion of the image of the conventional projector system will be described by paying attention to the projection light PL1.

  The projection light PL1 is irradiated on the reflecting surface 103 so as to form a substantially linear irradiation light edge E1. The irradiation light edge E11 in the reference state is formed in a straight line along the left-right direction on the reflection surface 103 as shown in FIG. 8A, and as shown in FIG. 8B, the left end A, the right end B, and Are overlapped when viewed from the right. Although illustration is omitted, the projection light PL2 irradiated on the reflecting surface 103 is also irradiated so as to be substantially linear along the left-right direction in the reference state. Then, as shown in FIG. 9, the projection light PL reflected by the movable mirror 102 is displayed at the center of the projection plane SC as a rectangular projection image 8 with the lower side and the upper side extending in the left-right direction.

  When the movable mirror 102 is rotated in the 1 CCW direction around the rotation axis J3 from the reference state, as shown in FIG. 8A, the right side 103R and the left side 103L are inclined with respect to the vertical direction as viewed from the rear. As shown in FIG. 8B, the right side 103R moves forward and the left side 103L moves backward.

  Then, the rotated reflecting surface 103 is irradiated with a projection light PL1 at a position different from the reflecting surface 103 in the reference state. Specifically, in the irradiation light edge E12 formed on the rotated reflecting surface 103, the left end C moves above the left end A of the irradiation light edge E11 and the right end D of the irradiation light edge E11 with respect to the reference state. It moves downward from the right end B and tilts with respect to the X direction as shown in FIG. This inclination angle increases as the amount by which the movable mirror 102 is rotated increases. That is, the projection light PL irradiated to the movable mirror 102 is rotated on the reflecting surface 103 as the movable mirror 102 is rotated. Then, the image reflected and displayed by the movable mirror 102 rotates corresponding to the rotation of the movable mirror 102.

  In addition to the rotation, the image reflected and displayed by the movable mirror 102 is an image including distortion associated with the inclination of the reflected optical axis LB with respect to the normal NV and distortion associated with a change in incident angle. That is, the projection light PL reflected by the movable mirror 102 is moved from the state in which the reflection optical axis LB is substantially parallel to the normal line NV of the projection plane SC to the left as the movable mirror 102 is rotated in the 1CCW direction. In addition to the inclination, the incident angle incident on the reflecting surface 103 in the vertical direction also changes with respect to the reference state, so that the reflection angle reflected by the reflecting surface 103 also changes.

  As a result, as shown in FIG. 9, an image 81 that is rotated clockwise and obliquely distorted is formed on the left side of the projection surface SC. With respect to this distortion, the distortion is corrected and displayed as a rectangular projection image 8L. Specifically, as shown in FIG. 9, the image 81 is inclined so that the left end portion of the lower side 81D is located above the right end portion, and the lower side 81D is reflected from the irradiation light edge E12. Displayed by the projection light PL. Then, in order to make the distorted image 81 into a rectangular image whose lower side and upper side are along the X direction, a non-display region (a pixel region corresponding to a hatched region in FIG. 9) is formed in the liquid crystal light valve 12. Thus, the image distortion is corrected.

  Similarly, when the movable mirror 102 is rotated in the 1CW direction around the rotation axis J3 from the reference state, on the right side of the projection plane SC, as shown in FIG. An image 82 distorted to have a trapezoidal shape is formed, but the distortion is corrected and displayed as a rectangular projection image 8R.

On the other hand, the projected image 7 moved in the left-right direction from the reference state by the projector system 10 of the present embodiment is distorted in a trapezoidal shape, but the rotation is suppressed. Specifically, the image distortion of this embodiment will be described with reference to FIG. 10 in addition to FIG.
10A and 10B are schematic views of the reflection surfaces 21A and 22A in the reflection device 2, wherein FIG. 10A is a view seen from the rear, and FIG. 10B is a view seen from the right.

  In the reference state, the rectangular reflecting surface 21A has upper and lower sides along the left-right direction when viewed from the rear, as shown in FIG. 10A, and the right side (right side 21R) and the left side (left side 21L). ) Are arranged along the vertical direction. Then, as shown in FIG. 10B, the reflection surface 21A is arranged so that the right side 21R and the left side 21L overlap in the reference state when viewed from the right.

  Similarly, in the reference state, the rectangular reflecting surface 22A has upper and lower sides along the left-right direction, as shown in FIG. 10 (a), and the right side (right side 22R) and the left side. (Left side 22L) is arranged along the vertical direction. Then, as shown in FIG. 10B, the reflecting surface 22A is arranged so that the right side 22R and the left side 22L overlap in the reference state when viewed from the right.

  As shown in FIG. 10B, the projection light PL projected from the projector 1 and spreads in a quadrangular pyramid shape is projected light PL3 serving as a lower (−Z side) edge and an upper (+ Z side) edge. It has projection light PL4 as a part. Here, the distortion of the image of the projector system 10 of the present embodiment will be described by paying attention to the projection light PL3.

  The projection light PL3 is irradiated so as to form a substantially linear irradiation light edge E2 on the reflecting surface 21A. The irradiation light edge E21 in the reference state is formed in a straight line along the left-right direction as shown in FIG. 10A, and the left end E and the right end F are viewed from the right as shown in FIG. 10B. And overlapped. Although illustration is omitted, the projection light PL4 irradiated to the reflecting surface 21A is also irradiated so as to be substantially linear along the left-right direction in the reference state.

  Similarly, the projection light PL3 reflected by the reflecting surface 21A is irradiated so as to form a substantially linear irradiation light edge E3 on the reflecting surface 22A. The irradiation light edge E31 in the reference state is formed in a straight line along the left-right direction as shown in FIG. 10A, and the left end J and the right end K are viewed from the right as shown in FIG. 10B. And overlapped. Although illustration is omitted, the projection light PL4 irradiated to the reflecting surface 22A is also irradiated so as to be substantially linear along the left-right direction in the reference state. Then, as shown in FIG. 6, the projection light PL reflected by the reflection surface 22A is displayed at the center of the projection surface SC as a rectangular projection image 7 whose lower side and upper side are along the left-right direction.

  When the first reflecting mirror 21 and the second reflecting mirror 22 are rotated in the 1 CCW direction around the first rotation axis J1 from the reference state, as shown in FIG. 10A, the right side 21R, 22R and the left sides 21L and 22L rotate so as to incline with respect to the vertical direction, and as shown in FIG. 10B, the right sides 21R and 22R move forward, and the left sides 21L and 22L move backward.

  Then, the rotated reflecting surface 21A is irradiated with a projection light PL3 at a position different from the reflecting surface 21A in the reference state. Specifically, the irradiation light edge E22 formed on the rotated reflecting surface 21A has a left end G at the rear end and a right edge from the left end E of the irradiation light edge E21 as shown in FIG. Although H moves forward from the right end F of the irradiation light edge E21, it hardly changes in the vertical direction, and the inclination with respect to the X direction is slight.

  Similarly, the rotated reflecting surface 22A is irradiated with a projection light PL3 at a position different from the reflecting surface 22A in the reference state. Specifically, with respect to the reference state, the irradiation light edge E32 formed on the rotated reflecting surface 22A has a left end L behind and to the right of the left end J of the irradiation light edge E31, as shown in FIG. M moves forward from the right end K of the irradiation light edge E31, but hardly changes in the vertical direction, and the inclination with respect to the X direction is slight. That is, the projection light PL irradiated to the first reflecting mirror 21 and the second reflecting mirror 22 is almost rotated on the reflecting surfaces 21A and 22A even when the first reflecting mirror 21 and the second reflecting mirror 22 are rotated. Irradiation without

  Then, as shown in FIG. 6, the projection light PL reflected by the second reflecting mirror 22 forms an image 71 having a trapezoidal distortion on the left side of the projection surface SC. Then, the image distortion is corrected and the lower side and the upper side are displayed as a rectangular projection image 7L along the X direction. This image 71 is displayed by the projection light PL whose upper side 71U is reflected from the irradiation light edge E32, and is formed with little rotation with respect to the projection image 7 in the reference state.

  Similarly, when the first reflecting mirror 21 and the second reflecting mirror 22 are rotated from the reference state in the 1CW direction around the first rotation axis J1, the projected image 7 is projected onto the projection surface SC as shown in FIG. An image 72 having a trapezoidal distortion is formed on the right side of the image, but the image distortion is corrected and displayed as a rectangular projection image 7R having a lower side and an upper side along the X direction.

  As described above, in the projector system 10 of the present embodiment, the reflection device 2 suppresses the rotation of the projection light PL and changes the reflection direction. Then, the images 71 and 72 reflected by the projector system 10 of the present embodiment are formed with a smaller rotation than the images 81 and 82 reflected by the projector system of the conventional example.

[Operation when the second drive unit is driven]
Next, the operation of the reflection device 2 when the second drive unit 25 of the present embodiment is driven will be described.
FIG. 11 is a schematic view of the first reflection mirror 21 and the second reflection mirror 22 in the reflection device 2 as viewed from the right (+ X direction). FIG. 12 is a schematic diagram showing a projected image 7 projected by the projector system 10.

  As described above, the reflecting device 2 has the reflected optical axis LB substantially parallel to the normal line NV of the projection surface SC in the reference state as shown in FIG. 11, and the projected image 7 is shown in FIG. In addition, the image is displayed in a substantially rectangular shape at the center of the projection screen SC.

  Similarly to the case where the first drive unit 24 is driven, the reflection device 2 is driven by the second drive unit 25 based on the instruction of the control unit 27 so that the second reflection mirror 22 moves the second rotation axis J2. Rotate to center. The projected image 7 moves in the vertical direction (± Z direction) according to the rotation of the second reflecting mirror 22.

Specifically, when the receiving unit 26 receives an operation signal for moving the projected image 7 upward, the control unit 27 outputs a driving signal corresponding to the signal to the second driving unit 25 and outputs the driving signal to the driving signal. The position signal based on this is output to the mirror position output unit 28.
In the second drive unit 25, the stepping motor is driven in response to the drive signal from the control unit 27 to rotate the second reflection mirror 22 in the 2CCW direction from the reference state.

When the second reflecting mirror 22 is rotated in the 2CCW direction from the reference state, the projection light PL reflected by the second reflecting mirror 22 has a reflected optical axis LB of the normal NV of the projection plane SC as shown in FIG. Inclined upward at an angle θ _U from a state substantially parallel to the angle. As shown in FIG. 12, an image 73 having a trapezoidal distortion is generated on the upper side (+ Z side) of the projection surface SC by the projection light PL inclined upward. As in the case of driving, the image distortion is corrected according to the amount of rotation of the second reflecting mirror 22, and the lower side and the upper side are displayed as a rectangular projection image 7U along the X direction.

Similarly, when the receiving unit 26 receives an operation signal for moving the projected image 7 downward from the reference state, the second reflecting mirror 22 is driven by the second driving unit 25 based on an instruction from the control unit 27. As shown in FIG. 11, it is rotated in the 2CW direction from the reference state. Then, the projection light PL reflected by the second reflection mirror 22 is inclined downward with an angle θ _D from a state in which the reflection optical axis LB is substantially parallel to the normal line NV of the projection plane SC.

As shown in FIG. 12, an image 74 having a trapezoidal distortion is generated on the lower side (−Z side) of the projection surface SC by the projection light PL inclined downward. Image distortion is corrected in accordance with the amount of rotation of the image 22 and the lower side and the upper side are displayed as a rectangular projection image 7D along the X direction.
As described above, the projected image 7 moves in the vertical direction when the second drive unit 25 is driven.

For convenience of explanation, the case where the first drive unit 24 is driven and the case where the second drive unit 25 is driven have been described separately, but either the first drive unit 24 or the second drive unit 25 is described. After driving one, the other can be driven or driven simultaneously.
FIG. 13 is a schematic diagram showing a projected image 7 projected by the projector system 10. When the reflecting device 2 is driven, the projector system 10 moves from the state in which the projection image 7 is displayed at the center of the projection surface SC in the reference state, as shown in FIG. The projected image 7 can be moved to any position using the space up to the corner. The projected image 7 that has been moved is subjected to image distortion correction corresponding to the positions of the first reflection mirror 21 and the second reflection mirror 22.

As described above, according to the projector system 10 of the present embodiment, the following effects can be obtained.
(1) In the projector system 10, the reflection device 2 suppresses the rotation of the projection light PL and changes the reflection direction. Therefore, when the projection image 7 is moved, the rotation of the image is suppressed and the correction amount for correcting the image distortion. Can be reduced. Therefore, the projector system 10 can effectively use the pixel area of the liquid crystal light valve 12, and can move the projection image 7 while suppressing a decrease in resolution.

  (2) Since the projector system 10 can move the projection image 7 without moving the projector 1, the projection image 7 can be efficiently moved with a low torque compared to a configuration in which the projector is rotated.

  (3) Since the projector 1 is fixed to the projector system 10, it is possible to efficiently cool a member having a high temperature, such as the light source unit 11, as compared with a configuration in which the projector is rotated. Therefore, it becomes possible to suppress the deterioration of the optical components, and the life of the projector system 10 can be extended.

  (4) Since the projector 1 is fixed to the projector system 10, the projector system 10 can be connected to the image supply device IS or an external power source without adopting special connection parts or a complicated structure as compared with the configuration in which the projector is rotated. This makes it possible to reduce the size and structure of the apparatus and reduce the cost.

  (5) Since the optical axis LA is located on the virtual plane VS, the projected image 7 moved in the left-right direction from the reference state has a symmetrical shape that is distorted in the left-right direction. It becomes the same in. Therefore, compared to a configuration in which the optical axis LA is not positioned on the virtual plane VS, it is possible to move the projection image 7 with a small image correction amount, that is, the projection image 7 with higher resolution, by effectively using the size of the projection plane SC. Become.

  (6) The projector system 10 includes an image correction unit 16, and the image correction unit 16 corrects an image corresponding to the positions of the first reflection mirror 21 and the second reflection mirror 22. Thereby, the distortion of the projected image 7 that is moved by the rotation of the first reflecting mirror 21 and the second reflecting mirror 22 can be corrected without performing a specific operation. Therefore, the convenience of the projector system 10 can be improved.

(Second Embodiment)
Next, a projector system 20 according to the second embodiment will be described with reference to the drawings.
In the following description, the same structure and the same members as those of the projector system 10 of the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
The projector system 20 according to the present embodiment further includes a third reflection mirror disposed between the first reflection mirror 41 and the projection optical unit 13 on the optical path. The projector system 20 is configured to be installed on the ceiling, display the projection image 7 on the projection surface SC arranged on the floor, the desk, or the like, and move the displayed projection image 7.

FIG. 14 is a perspective view schematically showing the projector system 20 of the second embodiment.
As shown in FIG. 14, the projector system 20 includes a projector 3 having a third reflection mirror 31 and a reflection device 4 having a first reflection mirror 41 and a second reflection mirror 42. Then, in the projector system 20, the first reflection mirror 41 and the second reflection mirror 42 sequentially reflect the projection light PL emitted from the projection optical unit 13 and reflected by the third reflection mirror 31 onto the projection plane SC. The projected image 7 is displayed (in FIG. 14, the projection surface SC and the projected image 7 are not shown). Then, the projector system 20 moves the projected image 7 when the reflecting device 4 is driven.

  14 shows a reference state. In the following, for convenience of explanation, the direction in which the projection light PL is emitted from the projection optical unit 13 is the front (+ Y direction), and the projection light PL is the first. The direction reflected by the three reflecting mirrors 31 is described as upward (+ Z direction), orthogonal to the Y direction and Z direction, and the right side in the drawing view of FIG. Further, the clockwise rotation direction when viewed from the rear (−Y direction) is 3CW direction, the counterclockwise rotation direction is 3CCW direction, and in the reference state, the clockwise rotation direction when viewed from the right side (+ X direction) is The 4CW direction and the counterclockwise rotation direction are described as the 4CCW direction.

As shown in FIG. 14, the projector 3 has the third reflecting mirror 31 disposed in front of the projection optical unit 13 and is installed on a ceiling (not shown) via the ceiling suspension jig 5.
The third reflecting mirror 31 has a reflecting surface 31A formed so as to efficiently reflect the light beam, and the outer periphery is held by a synthetic resin member. The third reflecting mirror 31 is attached to the exterior housing of the projector 3 via a holding member 32 disposed on the opposite side of the reflecting surface 31A. Specifically, the third reflection mirror 31 is disposed on the upstream side of the first reflection mirror 41 so that the projection light PL is reflected toward the first reflection mirror 41, and the reflection surface 31A is on the XY plane. It is attached with an angle of approximately 45 ° with respect to it.

  Further, the third reflection mirror 31 is configured to be movable with respect to the exterior housing of the projector 3 together with the holding member 32, and the projection light PL emitted from the projection optical unit 13 is irradiated onto the third reflection mirror 31. When it is not irradiated, it is possible. That is, the projector system 20 can project the projection light PL via the reflection device 4 and can directly project the projection light PL emitted from the projector 3 without passing through the reflection device 4. Note that the third reflection mirror 31 may be configured to be detachable from the exterior housing of the projector 3.

  As shown in FIG. 14, in addition to the first reflection mirror 41 and the second reflection mirror 42, the reflection device 4 has a mirror support mechanism 43, a first drive, which is different in configuration and shape from the reflection device 2 of the first embodiment. The unit 44 and the second drive unit 45 are provided. The mirror support mechanism 43 includes a base portion 431 and a rotating member 432.

  As described above, the reflection device 4 reflects the projection light PL reflected by the third reflection mirror 31 in order by the first reflection mirror 41 and the second reflection mirror 42, and is disposed below the projector system 20. The projected image 7 is displayed on the screen. And the reflective apparatus 4 is the same as the reflective apparatus 2 of 1st Embodiment, and the 1st drive part 44 and the 2nd drive part 45 are driven, and the 1st reflective mirror 41 and the 2nd reflective mirror 42 are driven. The position of the projected image 7 that is rotated and projected onto the projection surface SC is moved.

  Similar to the first reflecting mirror 21 of the first embodiment, the first reflecting mirror 41 has a reflecting surface 41A configured to efficiently reflect a light beam, and the outer periphery is held by a synthetic resin member. Yes. The first reflecting mirror 41 is disposed above (+ Z direction) the third reflecting mirror 31 so that the reflecting surface 41A faces the reflecting surface 31A of the third reflecting mirror 31. The first reflecting mirror 41 has an angle of about 45 ° with respect to the XZ plane so as to reflect the projection light PL reflected by the third reflecting mirror 31 forward (+ Y direction). The rotating member 432 is fixed.

  Similar to the first reflection mirror 41, the second reflection mirror 42 has a reflection surface 42A that efficiently reflects the light beam, and the outer periphery is held by a member made of synthetic resin. The second reflecting mirror 42 is disposed in front of the first reflecting mirror 41 (+ Y direction) so that the reflecting surface 42A faces the reflecting surface 41A of the first reflecting mirror 41, and is rotatably supported by the rotating member 432. The Specifically, in the reference state, the second reflecting mirror 42 is disposed such that the reflecting surface 42A is orthogonal to the reflecting surface 41A, and is supported such that the angle of the reflecting surface 42A with respect to the reflecting surface 41A can be changed. The second reflecting mirror 42 reflects the projection light PL reflected by the first reflecting mirror 41 downward (−Z direction).

As described above, the mirror support mechanism 43 includes the base portion 431 and the rotation member 432.
The base portion 431 is a member that supports the entire reflection device 4 and is attached to the ceiling. In addition, you may comprise the base part 431 and the ceiling suspension jig | tool 5 integrally.

  The first reflecting mirror 41 is fixed to the rotating member 432, and the second reflecting mirror 42 is rotatably supported, and is supported rotatably with respect to the base portion 431. Specifically, the rotating member 432 is formed in a U-shaped cross section, and the first reflecting mirror 41 is fixed to the bottom side of the U-shaped opening, and the second reflecting mirror 42 is disposed on the tip side of the opening. Is supported. The rotating member 432 is disposed in front of the base portion 431 (+ Y direction) and is supported so as to be rotatable around a first rotating shaft J5 extending in the Y direction. Further, the first rotation axis J5 intersects with the surfaces along the reflection surfaces 41A and 42A, and is formed on a virtual plane VS including the normal lines of the reflection surfaces 41A and 42A.

  A second rotation axis J6 that is orthogonal to the virtual plane VS is provided on the distal end side of the opening of the rotation member 432. Both sides of the second reflection mirror 42 are supported by the rotation member 432, and the second rotation axis It is rotatable around J6. That is, the first rotation axis J5 and the second rotation axis J6 are orthogonal to each other, and the rotation member 432 is rotatable in the 3CW direction and the 3CCW direction with respect to the base portion 431, and the second reflection mirror 42 is rotatable in the 4CW direction and the 4CCW direction in the reference state.

  The first drive unit 44 is disposed behind the base unit 431 (−Y direction) and includes a train wheel unit having a stepping motor, gears, and the like (not shown). The 1st drive part 44 rotates the rotation member 432 based on control of the control part 27 similarly to 1st Embodiment. Then, when the rotating member 432 is rotated, the first reflecting mirror 41 fixed to the rotating member 432 and the second reflecting mirror 42 supported by the rotating member 432 rotate integrally.

As shown in FIG. 14, the second drive unit 45 is disposed on the side opposite to the reflection surface 41A of the first reflection mirror 41, and includes a moving unit 451 and a train wheel unit having a stepping motor, gears, and the like (not shown). .
The moving unit 451 protrudes from the upper end of the first reflecting mirror 41 toward the second reflecting mirror 42, and the train wheel unit is driven based on the control of the control unit 27, whereby the first reflecting mirror 41 is driven. The amount of protrusion that protrudes from the end of the is changed. The moving part 451 is configured such that the tip abuts in the vicinity of the upper end of the second reflecting mirror 42, and the second reflecting mirror 42 is positioned with its rotation regulated by the abutting moving part 451.

  The second reflection mirror 42 rotates around the second rotation axis J6 according to the change in the protruding amount of the moving unit 451. Specifically, in the reference state, the moving unit 451 is set with a reference protrusion amount in which the reflecting surface 42A is orthogonal to the reflecting surface 41A. The second reflecting mirror 42 rotates in the 4CW direction when the protruding amount of the moving unit 451 is driven to be larger than the reference protruding amount from the reference state, and when the protruding amount is driven to be smaller than the reference protruding amount, the second reflecting mirror 42 is moved in the 4CCW direction. Rotate to.

  Similarly to the projector system 10 of the first embodiment, the projector system 20 moves the projected image 7 by driving the first driving unit 44 and the second driving unit 45 based on the signal from the receiving unit 26. The projection image 7 corresponding to the selected position is corrected.

As described above, according to the projector system 20 of the present embodiment, the following effects can be obtained in addition to the effects of the first embodiment.
(1) Since the projector system 20 includes the third reflection mirror 31, the projector system 20 can be moved by the reflection device 4 after the direction of the projection light PL is changed by the third reflection mirror 31. Therefore, the projector image 20 can be displayed and moved on the projection screen SC arranged on the desk or the floor with the projector system 20 installed on the ceiling, and the projector system 20 can be provided with a wider range of applications. It becomes.

  (2) The projector system 20 is configured such that the third reflection mirror 31 is movable, projects the projection light PL via the reflection device 4, and the projection light PL emitted from the projector 3 without passing through the reflection device 4. Can be projected directly, further expanding applications.

(Modification)
In addition, you may change the said embodiment as follows.
In the embodiment, the second reflection mirrors 22 and 42 are configured to be rotatable about the second rotation axes J2 and J6. However, the first reflection mirrors 21 and 41 are orthogonal to the first rotation axes J1 and J5. You may comprise so that it may rotate around a 2nd rotating shaft. Moreover, you may comprise so that both the 1st reflective mirrors 21 and 41 and the 2nd reflective mirrors 22 and 42 may be rotated.

  The receiving unit 26 and the control unit 27 of the embodiment are provided in the reflection devices 2 and 4, but may be configured to be provided in the projectors 1 and 3.

  The first drive units 24 and 44 and the second drive units 25 and 45 of the embodiment are electrically driven. However, the first reflection mirrors 21 and 41 and the second reflection can be performed by manually rotating a dial or the like. You may comprise by the manual type which the mirrors 22 and 42 rotate.

  The projector systems 10 and 20 of the embodiment are configured by one projector 1 and 3 and one reflection device 2 and 4, respectively, but are configured to include one reflection device and a plurality of projectors. Also good. For example, the first reflection mirror and the second reflection mirror are displayed when the projection image of the small screen of the other projector is superimposed on the projection image of the large screen of one projector or when the light source of the projector being projected is cut off. The projector may be configured to rotate to another projector.

  Although the third reflection mirror 31 of the second embodiment is provided in the projector 3, it may be configured to be mounted on the reflection device 4.

  Although the projector system 20 of the second embodiment is configured to be installed on the ceiling, the projector system 20 is not limited to the ceiling and may be installed above a desk or the like. Alternatively, the projector system 20 may be installed on the floor or desk so that the projected image 7 can be displayed on the ceiling and moved.

  The projector according to the embodiment uses the transmissive liquid crystal light valve 12 as the image forming unit, but may use a reflective liquid crystal light valve. Further, a device using a micromirror array as an image forming unit may be used.

  The light source of the embodiment is not limited to the discharge type light source, and may be configured by various solid light emitting elements such as a laser diode, an LED (Light Emitting Diode), an organic EL (Electro Luminescence) element, and a silicon light emitting element.

  DESCRIPTION OF SYMBOLS 1,3 ... Projector, 2, 4 ... Reflector, 7, 7D, 7L, 7R, 7U, 8, 8L, 8R ... Projection image 10, 20 ... Projector system, 11 ... Light source part, 12 ... Liquid crystal light valve, 16 ... Image correction unit, 21, 41 ... First reflection mirror, 21A, 22A, 41A, 42A ... Reflection surface, 22, 42 ... Second reflection mirror, 24, 44 ... First drive unit, 25, 45 ... Second Drive unit 31... Third reflection mirror J1, J5... First rotation axis, J2 and J6. Second rotation axis LA LA optical axis LB Reflect optical axis VS Virtual plane

Claims (4)

A projector that modulates a light beam emitted from a light source according to image information to form image light, and projects the image light;
A reflection device that reflects the image light;
With
The reflector is
A first reflecting mirror and a second reflecting mirror which are arranged opposite to each other and sequentially reflect the image light emitted from the projector;
Centering on a first rotation axis formed on a virtual plane that intersects with the respective reflecting surfaces of the first reflecting mirror and the second reflecting mirror and includes the normal line of each reflecting surface, A first drive unit that integrally rotates the first reflection mirror and the second reflection mirror;
A second drive unit configured to rotate at least one of the first reflection mirror and the second reflection mirror around a second rotation axis orthogonal to the first rotation axis;
A projector system comprising: The projector system according to claim 1,
The projector system, wherein the projector and the reflection device are arranged so that an optical axis of the image light emitted from the projector is positioned on the virtual plane. The projector system according to claim 1 or 2,
A projector system, further comprising a third reflection mirror that reflects the image light on an upstream side of the first reflection mirror. It is a projector system as described in any one of Claims 1-3, Comprising:
A projector system, further comprising an image correction unit that corrects an image corresponding to a position of the first reflection mirror and the second reflection mirror.

Images