JP2017227803A - Image projection device and image position adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image projection device and an image position adjustment device which can suppress the increase in size of an image generation part, while moving a position of the projection image on a projection plane in a wide range.SOLUTION: An image projection device includes: an image display element unit 8 having a DMD which is an image formation part for generating an image using light irradiated from a light source; a projection optical system unit 10 having a projection lens which is a projection optical part for projecting an image generated by the DMD on a screen which is a projection plane; and a DMD shift mechanism 28 which is image generation part moving means for moving the image display element unit 8 for the device main body by a projector which is an image projection device having a projection optical system shift mechanism 30 which is projection optical part moving means for moving the projection optical system unit 10 for the device main body.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an image projection device and an image position adjustment device.

Conventionally, there has been provided an optical shift means for adjusting the position of the projected image on the projection plane by moving the projection lens constituting the projection optical system in a direction perpendicular to the optical axis with respect to the image display element which is an image generation unit. A known image projection apparatus is known.
Japanese Patent Application Laid-Open No. 2005-228561 discloses an image projection apparatus of this type in which the position of a projection image on a projection plane is adjusted by changing the position of an optical shift unit described above and a region where an image is displayed on an image display element. The structure provided with a shift means is described. Japanese Patent Application Laid-Open No. H10-228561 describes that the projected image can be shifted in a wide range by shifting the projected image to a position that cannot be handled only by the optical shift unit.

  However, in the configuration described in Patent Document 1, an image display area in which an image is displayed and an image non-display area in which no image is displayed are formed on an image display element fixed to the apparatus main body. When the projected image is shifted, the position of the image display area on the image display element is determined by setting the part that was the image non-display area as the image display area and the part that was the image display area as the image non-display area. Has changed. In this configuration, since there is an image non-display area that does not display an image on the image element, the image display element is larger than the image display area that contributes to the generation of the projected image.

  In order to solve the problems described above, the present invention provides an image generation unit that generates an image using light emitted from a light source, a projection optical unit that projects an image generated by the image generation unit on a projection plane, An image projection apparatus comprising: a projection optical unit moving unit that moves the projection optical unit with respect to the apparatus main body; and an image generation unit moving unit that moves the image generation unit with respect to the apparatus main body. Is.

  According to the present invention, there is an excellent effect that it is possible to suppress the enlargement of the image generation unit while moving the position of the projection image on the projection surface in a wide range.

Explanatory drawing of the moving mechanism with which an optical engine part is provided. The perspective view of a projector. FIG. 2 is an external perspective view showing a projector and a screen. The internal perspective view of a projector, (a) is the perspective view seen from the near side in FIG. 2, (b) is the perspective view seen from the back side in FIG. The perspective view of an optical engine part and a light source part. FIG. 3 is an explanatory perspective view showing the internal configuration of the projection optical system unit. The side view which shows the internal structure of a projection optical system unit, and the positional relationship with a screen. Explanatory drawing which shows the arrangement configuration of the optical path in an illumination optical system unit, and an image display element unit. The exploded perspective view of the actuator of a DMD shift mechanism. Explanatory drawing which shows the displayable area | region of the projection image on a screen. The block diagram of the control system which performs the image shift in a projector. The flowchart of the 1st example of the control which adjusts the position of a projection image. The flowchart of the 2nd example of control which adjusts the position of a projection image. The flowchart of the 3rd example of control which adjusts the position of a projection image.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 2 is a perspective view of a projector 1 that is an image projection apparatus according to an embodiment of the present invention, and FIG. 3 is an external perspective view showing the projector 1 and a screen 2 that is a projection surface. As shown in FIG. 3, the normal direction of the screen 2 is the Y direction, the short axis direction (vertical direction) of the screen 2 is the Z direction, and the long axis direction (horizontal direction) of the screen 2 is the X direction.

  The projector 1 is a device that generates a projection image based on image data input from a personal computer, a video camera, or the like, and projects and displays the projection image P on the screen 2. In recent years, liquid crystal projectors have been improved in terms of high resolution and low price due to high resolution of liquid crystal panels, high efficiency of light sources (lamps), and the like. In addition, small and light projectors 1 using DMD (Digital Micro-mirror Device), which is a micro-drive mirror device, are widely used, and projectors 1 are widely used not only in offices and schools but also at home. .

FIG. 4 is an internal perspective view of the interior of the projector 1 with the main body cover removed. 4A is a perspective view of the inside of the projector 1 as seen from the front side of FIG. 2, and FIG. 4B is a perspective view of the inside of the projector 1 as seen from the back side of FIG.
FIG. 5 is a perspective view of the optical engine unit 6 and the light source unit 7 provided in the projector 1. As shown in FIG. 5, the projector 1 includes an optical engine unit 6 and a light source unit 7 having a light source that emits white light. The optical engine unit 6 includes an image display element unit 8, an illumination optical system unit 9, and a projection optical system unit 10.

FIG. 6 is an explanatory perspective view showing the internal configuration of the projection optical system unit 10, and FIG. 7 is a side view showing the positional relationship between the internal configuration of the projection optical system unit 10 and the screen 2.
The projection optical system unit 10 includes a projection lens 21 as a projection optical unit that projects an image generated by an image generation unit described later onto the screen 2 as a projection image.

The front-type projector 1 has improved portability and has been used for small meetings of several people. Such a projector 1 is required to be able to project an image on a large screen (enlarge the projection screen) and to make the “projection space required outside the projector” as small as possible.
As a configuration that satisfies this requirement, in the projector 1 according to the present embodiment, as shown in FIGS. 6 and 7, the transmission optical system in the projection optical system unit 10 such as the projection lens 21 is set parallel to the screen 2. A light beam that has passed through a transmission optical system such as the projection lens 21 is folded by a folding mirror 23 and then magnified and projected onto the screen 2 by a free-form curved mirror 24. With this configuration, as shown in FIG. 4, the optical engine unit 6 can be reduced vertically and three-dimensionally.

On the upper surface of the projector 1, a transmissive glass 51 from which the light flux of the projection image P is emitted is provided, and the light flux that has passed through the transmissive glass 51 is projected onto the screen 2.
In the present embodiment, a high pressure mercury lamp is employed as the light source provided in the light source unit 7. The light emitted from the high-pressure mercury lamp included in the light source unit 7 is separated into R (red), G (green), and B (blue) colors by the illumination optical system unit 9 of the optical engine unit 6 and then the image display element unit. 8 is irradiated. The light irradiated and reflected on the image display element unit 8 is projected onto the screen 2 via the projection optical system unit 10.

Next, with reference to FIG. 8, a state in which the illumination optical system unit 9 splits the light into RGB colors and an optical path from the illumination optical system unit 9 to the image display element unit 8 and the projection optical system unit 10 will be described. .
FIG. 8 is an explanatory diagram showing an arrangement configuration of the optical paths (L1 to L5) in the illumination optical system unit 9 and the image display element unit 8. As shown in FIG.
The image display element unit 8 is an image generation unit that generates an image using light emitted from the light source unit 7, and includes a DMD 16 that is an image display element.

As shown in FIG. 8, the illumination optical system unit 9 includes a color wheel 11, a light tunnel 12, two relay lenses 13, a cylinder mirror 15, and a concave mirror 14.
The white light emitted from the light source unit 7 is split by the color wheel 11 having the RGB color segments. The light of each color after being split is incident on the cylinder mirror 15 after passing through the light tunnel 12 that plays a role in uniforming the illuminance distribution and the relay lens 13 that collects light while correcting the chromatic aberration on the optical axis. ("L1" in FIG. 8). The light reflected by the cylinder mirror 15 enters the concave mirror 14 (“L2” in FIG. 8), and the light reflected by the concave mirror 14 reaches the DMD 16 (“L3” in FIG. 8).

The DMD 16 is a micro-drive mirror device having a large number of micro mirrors that can be driven so as to change the inclination of the reflecting surface, and each color mirror is driven in a time-sharing manner on the basis of video data so that light of each color is a predetermined image Reflect to form.
The light used for forming the projection image P is guided to the projection optical system unit 10 shown in FIG. 6 by the action of the DMD 16 (“L4” in FIG. 8). Then, as shown in FIG. 7, it reaches the free-form surface mirror 24 via the projection lens 21 and the folding mirror 23, and is enlarged and projected on the screen 2 by the free-form surface mirror 24.

  On the other hand, light that is not used to form the projection image P is irradiated onto the OFF light plate 20 by the time-division driving of the DMD 16 and is not projected onto the screen 2. As shown in FIG. 7, when the projection lens 21 is arranged vertically, the installation area can be reduced, and a three-dimensional and compact design can be achieved.

FIG. 1 is an explanatory diagram of a moving mechanism provided in the optical engine unit 6.
The illumination optical system unit 9 of the optical engine unit 6 of the projector 1 of the present embodiment is fixed to a bottom frame 5 (see FIG. 4) that forms a casing of the bottom of the apparatus main body of the projector 1.
The projection optical system unit 10 including the projection lens 21 that is a projection optical unit and the illumination optical system unit 9 can be coupled to the illumination optical system unit 9 so that the projection optical system unit 10 can be moved in the horizontal direction. A projection optical system shift mechanism 30 is provided.
The image display element unit 8 including the DMD 16 that is an image generation unit and the illumination optical system unit 9 hold the image display element unit 8 movably in the horizontal direction with respect to the illumination optical system unit 9. A DMD shift mechanism 28 is provided.

  In the projector 1 of the present embodiment, the optical axis of the projection lens 21 is in the vertical direction. For this reason, the projection optical system unit 10 can be shifted in the direction orthogonal to the optical axis of the projection lens 21 by moving the projection optical system unit 10 back and forth and right and left in the horizontal direction by the projection optical system shift mechanism 30. Further, the image display element unit 8 can be shifted in the direction orthogonal to the optical axis of the projection lens 21 by moving the image display element unit 8 in the horizontal direction in the horizontal direction by the DMD shift mechanism 28.

  When the image display element unit 8 is moved leftward in FIG. 1 as indicated by an arrow A in FIG. 1, the projection optical system unit 10 is moved to the right in FIG. 1 as indicated by an arrow B in FIG. By moving in the direction, the shift amount of the projected image becomes wider than the shift amount of each unit alone. The projection optical system unit 10 is controlled to move in the direction opposite to the direction in which the image display element unit 8 has moved, not only in the horizontal direction in FIG. 1 but also in other directions.

  2. Description of the Related Art Conventionally, as a projector, an optical shift that shifts a projection optical system with respect to an image display element is known as a configuration that adjusts the position of a projection image on a projection surface. In addition, the image display area where the original image is actually formed is set smaller than the maximum displayable range of the original image on the image display element, and an image non-display area is formed around the image display area to display the image. An image shift that shifts an image display area on an element is known. In this configuration, the image display area is shifted in the vertical and horizontal directions by the height and width of the image non-display area.

  In Patent Document 1, a wide range of projection is performed by combining an optical shift function that shifts the projection optical system with respect to the image display element and a digital shift function that shifts an area where an original image is formed on the image forming element. A configuration for shifting an image is described. However, in the configuration using the digital shift function, the image display area where the original image is actually formed is set smaller than the maximum displayable range of the original image of the image display element, and the image non-display area is surrounded around the image display area. A display area is formed. For this reason, the entire area of the image display element cannot be used as the image display area, and there is a problem that the number of pixels of the projected image is reduced with respect to the total number of pixels of the image display element.

  In the digital shift function, the image display element is larger than the image display area that contributes to the formation of the projected image. Since image display elements such as DMD are generally expensive, if the image display element is larger than the image display area, the resolution of the projected image can be improved against the increase in the manufacturing cost of the image display element. The problem of not.

On the other hand, in the projector 1 of the present embodiment, the projection optical unit moving unit that moves the projection optical system unit 10 relative to the apparatus main body, and the projection optical unit movement that moves the image display element unit 8 relative to the apparatus main body. Means.
By moving the image display element unit 8 in the direction opposite to the movement direction of the projection optical system unit 10, the original image on the image display element and the projection lens 21 are relatively moved rather than the configuration in which only the projection optical system unit 10 is moved. It is possible to shift greatly. Thereby, the shift range of the projection image P with respect to the projection surface such as the screen 2 can be widened. In addition, since it is not necessary to provide an image non-display area corresponding to the image shift range in the image display element, it is possible to suppress an increase in the size of the image display element. Furthermore, by not providing the image non-display area, it is possible to prevent the number of pixels of the projected image from decreasing with respect to the total number of pixels of the image display element, and the projected image P in a wide range without reducing the number of pixels. Shifting can be performed.

  FIG. 9 is an exploded perspective view of the actuator of the DMD shift mechanism 28. FIG. 9A is an exploded perspective view of the fixed unit 31 fixed to the illumination optical system unit 9, and FIG. 9B is a movable that moves relative to the illumination optical system unit 9 together with the image display element unit 8. 4 is an exploded perspective view of a unit 41. FIG. The DMD shift mechanism 28 includes a fixed unit 31 and a movable unit 41.

The fixed unit 31 shown in FIG. 9A includes a top plate 32, a base plate 33, a sphere 34, a sphere holder 35, a sphere receiver 36, a magnet 37, a column 38, a sphere position adjusting screw 39, and the like.
A movable unit 41 shown in FIG. 9B includes a movable plate unit 44 and an image display element unit 8. The movable plate unit 44 includes a movable plate 42, a voice coil 43, and the like. The image display element unit 8 includes a DMD 16, a coupling plate 46, a DMD holding bracket 47, a step screw 48, a spring 49, a heat sink 18, and the like.
The DMD shift mechanism 28 configured by the fixed unit 31 and the movable unit 41 shown in FIG. 9 is configured to move the movable unit 41 relative to the fixed unit 31 by electromagnetic force generated by the magnet 37 and the voice coil 43. .

  FIG. 9 shows an example of an actuator in the DMD shift mechanism 28, but the same actuator is also used for the projection optical system shift mechanism 30.

  The projection optical system shift mechanism 30 of the projector 1 according to the present embodiment is configured to move the projection optical system unit 10 relative to the illumination optical system unit 9. The configuration for moving the projection optical system relative to the illumination optical system is not limited to the configuration for moving the entire projection optical system unit 10. The housing of the projection optical system unit 10 is fixed to the illumination optical system unit 9, and at least one of the lenses constituting the projection lens 21 in the projection optical system unit 10 is moved with respect to the housing of the projection optical system unit 10. A lens shift mechanism may be used. By adopting a configuration in which the lens is moved, the moving body can be reduced, and the projector 1 can be downsized. On the other hand, if it is the structure which moves the projection optical system unit 10 whole, it will be easy to maintain the positional accuracy of the lenses which comprise the projection lens 21, and the positional accuracy of the optical components of the projection optical system with which the projection optical system unit 10 is provided. Become.

FIG. 10 is an explanatory diagram showing a displayable region of the projected image P on the screen 2 by shifting the image display element unit 8 and the projection optical system unit 10.
FIG. 10A shows the relationship between the display area of the projection image P and the area “P1” where the projection image P can be displayed by shifting the projection optical system unit 10. FIG. 10B shows the relationship between the display area of the projection image P and the area “P2” where the projection image P can be displayed by shifting the image display element unit 8.

The area indicated by “P3” in which the display area of the projected image P of FIG. 10B is displayed at the center is overlapped with the limit value of the area indicated by “P1” of FIG. As a result, as shown in FIG. 10C, a wide display area “P3” in which the projection image P can be displayed by shifting the projection optical system unit 10 and the image display element unit 8 is provided. Can be sought.
As shown in FIG. 1, by reversing the shift direction of the projection optical system unit 10 and the image display element unit 8, the wide frame range of the wide image displayable region “P3” shown in FIG. The projected image P can be shifted within.

FIG. 10D shows the projection on the screen 2 when the projection optical system unit 10 and the image display element unit 8 of the projector 1 in the state of projecting the projection image P shown in FIG. It is explanatory drawing of the position of the image P. FIG. In the projector 1 of the present embodiment, as shown in FIG. 10D, the projected image is wider than the region “P1” where the projected image P can be displayed by shifting only the projection optical system unit 10. P can be displayed.
By detecting the movement amount of the image display element unit 8 by the DMD shift mechanism 28 and the movement amount of the projection optical system unit 10 by the projection optical system shift mechanism 30, the position of the projection image P in the wide image displayable region “P3”. Can be calculated.

FIG. 11 is a block diagram of a control system that performs image shift in the projector 1.
When the user inputs the shift width of the projection image P to the operation unit 50, the control unit 40 controls the projection optical system shift mechanism 30 and the DMD shift mechanism 28 to move the projection optical system unit 10 and the image display element unit 8. Control the amount.

  The projector 1 according to this embodiment includes a light source unit 7 that is a light source, and includes an image display element unit 8 that includes a DMD 16 that is a modulation element that displays an image using light from the light source unit 7. The illumination optical system unit 9 includes an optical element (a color wheel 11, a light tunnel 12, a relay lens 13, a cylinder mirror 15, a concave mirror 14, etc.) that guides light from the light source unit 7 to the DMD 16 in the image display element unit 8. Is provided. Furthermore, a projection optical system unit 10 that projects light emitted from the image display element unit 8 onto a projection surface such as a screen 2 is provided.

  The projector 1 includes a DMD shift mechanism 28 as image display shift means that can move the image display element unit 8 relative to the illumination optical system unit 9. Further, a projection optical system shift mechanism 30 that is a projection optical system shift means that can move the projection optical system unit 10 relative to the illumination optical system unit 9 is provided. Further, a control unit 40 that is a control unit that controls the DMD shift mechanism 28 and the projection optical system shift mechanism 30 is provided. The controller 40 projects the DMD shift mechanism 28 and the projection so that the movement direction of the projection optical system unit 10 by the projection optical system shift mechanism 30 is opposite to the movement direction of the image display element unit 8 by the DMD shift mechanism 28. The optical system shift mechanism 30 is controlled. Further, the control unit 40 controls the movement of the image display element unit 8 by the DMD shift mechanism 28 and the movement of the projection optical system unit 10 by the projection optical system shift mechanism 30 alternately.

FIG. 12 is a flowchart of a first example of control for adjusting the position of the projected image P.
As shown in FIG. 12, after the user performs a shift adjustment operation (S11), when adjusting the position of the projected image P, first, the position of the image display element unit 8 and the position of the projection optical system unit 10 are adjusted. Are detected (S12). As a control method, the image display element unit 8 is shifted (S14), and then the projection optical system unit 10 is shifted in a direction opposite to the shift direction of the image display element unit 8 (S17).

Before shifting the projected image P, whether or not the projected image P exists in the center of the region (region “P3” in FIG. 10C) where the projected image P can be displayed on the projection plane (FIG. 10 ( Whether or not the state is shown in c) is determined by the position of the image display element unit 8 (S13).
In the flow shown in FIG. 12, since the control method of moving the projection optical system unit 10 after shifting the image display element unit 8 is employed, if the image display element unit 8 is at the center of the movement range, the projection optical system is used. The system unit 10 should also be in the center of the movement range. For this reason, it is possible to determine whether or not the projected image P is in the center of a region where image display is possible, depending on the position of the image display element unit 8.

Thereafter, if the position of the image display element unit 8 is the center (“Yes” in S13), the image display element unit 8 is moved in an arbitrary direction (S14). Next, the position of the image display element unit 8 and the position of the projection optical system unit 10 are detected (S15), and the image display element is determined from the relative position difference between the image display element unit 8 and the projection optical system unit 10. It is determined whether or not the unit 8 has been shifted (S16). If the relative position difference is after the image display element unit 8 is shifted (“Yes” in S16), the projection optical system unit 10 is shifted in the direction opposite to the moving direction of the image display element unit 8. (S17).
In consideration of the case where the projection optical system unit 10 is not shifted due to, for example, the case where the power is cut off in the middle, in the present embodiment, the unit to be moved is determined based on the relative position difference described above. doing.
Finally, if the position of the projected image P is at the position requested by the user (“Yes” in S18), the position adjustment is completed, and if there is not enough (“No” in S18), the user performs a shift operation ( S11).

  As shown in FIG. 12, the projector 1 according to the present embodiment has a configuration in which the two units are alternately moved so that the projection optical system unit 10 is moved after the image display element unit 8 is moved. .

FIG. 13 is a flowchart of a second example of control for adjusting the position of the projected image P.
The flowchart shown in FIG. 13 is different from the flowchart shown in FIG. 12 in that the image display element unit 8 is shifted after the projection optical system unit 10 is shifted first, but the other points are common and detailed description is omitted. To do.

FIG. 14 is a flowchart of a third example of control for adjusting the position of the projected image P.
In the flowchart shown in FIG. 14, the image display element unit 8 is preferentially shifted over the projection optical system unit 10. That is, after the image display element unit 8 is moved to the limit of the movable range (“Yes” in S34), the projection optical system unit 10 is moved in the direction opposite to the image display element unit 8.
The projection optical system unit 10 is heavier than the image display element unit 8 and requires a large force when moving. For this reason, it is possible to reduce power consumption by preferentially moving the image display element unit 8 that does not require a large force when moving, and then moving the projection optical system unit 10.

  In the projector 1 of this embodiment, the configuration using the reflective DMD 16 as the image display element has been described. The image display element is not limited to the DMD 16 and may be a transmissive image display element.

  What was demonstrated above is an example, and there exists an effect peculiar for every following aspect.

(Aspect A)
An image generation unit such as DMD 16 that generates an image using light emitted from a light source such as the light source unit 7, and projection optics such as a projection lens 21 that projects an image generated by the image generation unit onto a projection surface such as the screen 2. In the image projection apparatus such as the projector 1, the image generation unit is moved relative to the apparatus main body, and the projection optical unit moving unit such as the projection optical system shift mechanism 30 that moves the projection optical unit with respect to the apparatus main body. The image generating unit moving means such as the DMD shift mechanism 28 is provided.
According to this, as described in the above embodiment, the projection optical unit can be moved with respect to the apparatus main body, and the image generation unit can be moved with respect to the apparatus main body in the direction opposite to the projection optical unit. Become. By moving in this way, it is possible to move the image on the image generation unit and the projection optical unit relatively larger than in the configuration in which only the projection optical unit is moved. The range can be widened. In addition, since the image generation unit is moved, it is not necessary to provide the image generation unit with an image non-display area corresponding to the moving range of the image, and thus the enlargement of the image generation unit can be suppressed. In such an aspect A, it is possible to suppress an increase in the size of the image generation unit while moving the position of the projection image on the projection plane in a wide range.

(Aspect B)
In aspect A, the image generation of the DMD 16 or the like by the image generation unit moving unit such as the DMD shift mechanism 28 is performed with respect to the moving direction of the projection optical unit such as the projection lens 21 by the projection optical unit moving unit such as the projection optical system shift mechanism 30. And a control unit such as a control unit 40 for controlling the projection optical unit moving unit and the image generating unit moving unit so that the moving directions of the units are opposite to each other.
According to this, as described in the above embodiment, the image on the image generation unit and the projection optical unit can be moved relatively larger than the configuration in which only the projection optical unit is moved. A configuration that widens the movement range of the projected image with respect to the surface can be realized.

(Aspect C)
In the aspect A or B, the projection optical unit including the illumination optical unit such as the illumination optical system unit 9 that guides the light emitted from the light source such as the light source unit 7 to the image generation unit such as the DMD 16, and the like. The moving unit moves the projection optical unit such as the projection lens 21 relative to the illumination optical unit, and the image generation unit moving unit such as the DMD shift mechanism 28 moves the image generation unit relative to the illumination optical unit. Move to.
According to this, as described in the above embodiment, it is possible to realize a configuration in which the image generation unit and the projection optical unit are moved relative to the apparatus main body.

(Aspect D)
In any one of the aspects A to C, the image generation unit moving unit such as the DMD shift mechanism 28 includes an actuator such as the magnet 37 and the voice coil 43, and the illumination optical system unit 9 and the like using the driving force of the actuator. The image generating unit such as the DMD 16 is moved by a movable unit such as the movable unit 41 that is movable relative to the illumination optical unit.
According to this, as described in the above embodiment, it is possible to realize a configuration in which the image generation unit is moved relative to the apparatus main body.

(Aspect E)
In any one of the aspects A to D, the projection optical unit moving unit such as the projection optical system shift mechanism 30 is an optical element moving unit such as a lens shift mechanism that moves the projection optical element such as a lens constituting the projection lens 21. It is.
According to this, as described in the above embodiment, it is possible to realize a configuration in which the projection optical element of the projection optical unit is moved relative to the apparatus main body. Further, by adopting a configuration in which the projection optical element is moved, the moving body can be made small, and the image projection apparatus such as the projector 1 can be downsized.

(Aspect F)
In any one of the aspects A to E, the projection optical unit moving unit such as the projection optical system shift mechanism 30 includes an actuator, and the illumination optical unit such as the illumination optical system unit 9 is used with the driving force of the actuator. The projection optical unit such as the projection lens 21 is moved by a movable unit such as a casing of the projection optical system unit 10 that is relatively movable.
According to this, as described in the above embodiment, it is possible to realize a configuration in which the projection optical unit is moved relative to the apparatus main body. In addition, by moving the entire projection optical unit, it is easy to maintain the positional accuracy of the projection optical elements such as lenses constituting the projection optical unit.

(Aspect G)
In any of the aspects A to F, the image generating unit movement of the DMD shift mechanism 28 or the like is moved before the projection optical unit such as the projection lens 21 is moved by the projection optical unit moving unit such as the projection optical system shift mechanism 30 or the like. The image generating unit such as the DMD 16 is moved by the means.
According to this, as described with reference to FIG. 12 in the above embodiment, the image generation unit and the projection optical unit are moved with respect to the apparatus main body by moving the image generation unit first and then moving the projection optical unit. The structure which moves each part to the opposite side is realizable.

(Aspect H)
In aspect G, after the image generating unit reaches the end of the moving range of the image generating unit such as DMD 16 by the image generating unit moving unit such as DMD shift mechanism 28, the projection optical unit moving unit such as projection optical system shift mechanism 30 The movement of the projection optical unit such as the projection lens 21 is started.
According to this, as described with reference to FIG. 14 in the above-described embodiment, the image generation unit that does not require a large force when moving is preferentially moved, and then the projection optical unit is moved, so that power can be obtained. Can be reduced. In addition, when the moving accuracy of the image generating unit moving unit is better than that of the projecting optical unit moving unit, priority is given to moving with high accuracy, and the movement with poor accuracy is followed by projection on the side with poor moving accuracy. It is possible to suppress the influence on the position of the image.

(Aspect I)
In any of the aspects A to F, before the image generating unit such as the DMD 16 is moved by the image generating unit moving unit such as the DMD shift mechanism 28, the projection optical unit moving unit such as the projection optical system shift mechanism 30 is used. The projection optical unit such as the projection lens 21 is moved.
According to this, as described with reference to FIG. 13 in the above embodiment, the image generation unit and the projection optics are moved with respect to the apparatus main body by moving the projection optical unit first and then moving the image generation unit. The structure which moves each part to the opposite side is realizable.

(Aspect J)
A projection optical unit moving unit such as a projection optical system shift mechanism 30 for moving a projection optical unit such as a projection lens 21 that projects an image generated by an image generation unit such as a DMD 16 onto a projection surface such as a screen 2 is provided. The image position adjustment apparatus such as the optical engine unit 6 that adjusts the position of the projection image projected by the unit on the projection plane includes a projection optical unit moving unit such as a DMD shift mechanism 28 that moves the image generation unit.
According to this, similarly to the above-described aspect A, it is possible to suppress an increase in the size of the image generation unit while moving the position of the projection image on the projection plane in a wide range.

DESCRIPTION OF SYMBOLS 1 Projector 2 Screen 5 Bottom frame 6 Optical engine part 7 Light source part 8 Image display element unit 9 Illumination optical system unit 10 Projection optical system unit 11 Color wheel 12 Light tunnel 13 Relay lens 14 Concave mirror 15 Cylinder mirror 16 DMD
18 Heat sink 20 Optical plate 21 Projection lens 23 Mirror 24 Free-form surface mirror 28 DMD shift mechanism 30 Projection optical system shift mechanism 31 Fixed unit 32 Top plate 33 Base plate 34 Sphere 35 Sphere holder 36 Sphere receiver 37 Magnet 38 Strut 39 Sphere position adjustment screw 40 Control Unit 41 Movable Unit 42 Movable Plate 43 Voice Coil 44 Movable Plate Unit 46 Coupling Plate 47 Holding Bracket 48 Step Screw 49 Spring 50 Operation Unit 51 Transmission Glass P Projected Image

Japanese Patent No. 5346080

Claims (10)

An image generator that generates an image using light emitted from a light source;
A projection optical unit that projects an image generated by the image generation unit onto a projection plane;
In an image projection apparatus comprising: a projection optical unit moving unit that moves the projection optical unit with respect to the apparatus main body;
An image projection apparatus comprising image generation unit moving means for moving the image generation unit relative to the apparatus main body. The image projection apparatus according to claim 1,
The projection optical unit moving unit and the image generating unit so that the moving direction of the image generating unit by the image generating unit moving unit is opposite to the moving direction of the projection optical unit by the projecting optical unit moving unit. An image projection apparatus comprising control means for controlling movement means. The image projection device according to claim 1 or 2,
An illumination optical unit that guides light emitted from the light source to the image generation unit;
The projection optical unit moving means moves the projection optical unit relative to the illumination optical unit,
The image projection apparatus according to claim 1, wherein the image generation unit moving unit moves the image generation unit relative to the illumination optical unit. In the image projection device according to any one of claims 1 to 3,
The image generation unit moving means includes an actuator,
An image projection apparatus, wherein the image generation unit is moved by a movable unit that is movable relative to the illumination optical unit using a driving force of the actuator. The image projection apparatus according to any one of claims 1 to 4,
The projection optical unit moving means is an optical element moving means for moving a projection optical element. The image projection device according to any one of claims 1 to 5,
The projection optical unit moving means includes an actuator,
An image projection apparatus, wherein the projection optical unit is moved by a movable unit that is movable relative to the illumination optical unit using a driving force of the actuator. The image projection device according to any one of claims 1 to 6,
An image projection apparatus, wherein the image generation unit is moved by the image generation unit movement unit before the projection optical unit is moved by the projection optical unit movement unit. The image projection apparatus according to claim 7.
An image projection characterized by starting the movement of the projection optical unit by the projection optical unit moving unit after the image generating unit reaches the end of the moving range of the image generating unit by the image generating unit moving unit. apparatus. The image projection device according to any one of claims 1 to 6,
An image projection apparatus, wherein the projection optical unit is moved by the projection optical unit moving unit before the image generation unit is moved by the image generation unit moving unit. A projection optical unit moving unit that moves a projection optical unit that projects an image generated by the image generation unit onto a projection plane;
In the image position adjusting device for adjusting the position on the projection surface of the projection image projected by the projection optical means,
An image position adjusting apparatus comprising: a projection optical unit moving unit that moves the image generating unit.

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