JP2016014748A - Image projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image projection device having imaging means, the image projection device capable of reducing into a compact size when stored, and also capable of taking an image while suppressing degradation of a peripheral image by making a field angle of a lens of the imaging means, even if arranged in proximity of a projection surface to project a projection image in an enlarged manner.SOLUTION: A projector 1 includes a camera 70 configured to take an image within a projection area of a projection image projected on a screen 100 in an enlarged manner. A projection part cover 60 holding the camera 70 is provided for a housing cover 2 of the projector 1, in a manner movable from a cover closed position when the camera 70 is not taking a projection image, to a cover opening position when taking an image. The distance between the screen 100 and a lens 71 of the camera 70 in a direction vertical to the screen 100 becomes longer when the projection part cover 60 is located in the cover opening position than in the cover closed position.

Description

  The present invention relates to an image projection apparatus such as a projector that enlarges and projects an image on a projection surface such as a screen.

  2. Description of the Related Art Conventionally, an image projection apparatus having an imaging unit for capturing a projected image and controlling the image projection apparatus based on the captured image information or transmitting the captured image information to an external device such as a personal computer. It has been known.

For example, Patent Document 1 describes an image projection apparatus including the following imaging means.
An imaging means (camera) for imaging the projection area of the projection image is fixedly provided in the vicinity of the exit for emitting the projection light provided in the external housing of the image projection apparatus. Then, the image projection device is disposed close to the projection surface, and the projection image is enlarged and projected on the projection surface obliquely from above.

However, in the image projection apparatus of Patent Document 1, since the imaging means is fixedly provided near the exit of the exterior housing, when the image projection apparatus is disposed close to the projection surface and projects a projected image in an enlarged manner. The distance between the projection surface in the direction perpendicular to the projection surface and the lens of the image pickup means is also reduced.
For this reason, the angle of view of the lens of the imaging means must be increased.
When a lens with a large angle of view is used, the spherical aberration of the lens increases, and when the projection area of the projected image enlarged and projected from near the projection surface is imaged, the captured peripheral image is deteriorated.

Patent Document 1 also describes that the image pickup means may protrude from the exterior housing, and the image pickup means protrudes from the exterior housing so as to increase the distance between the lens of the image pickup means and the projection surface. Then, a method of reducing the angle of view of the lens of the imaging means as much as possible is also conceivable.
However, since the image pickup unit is fixedly provided, the space occupied by the image projection device when image projection is not performed is increased by the amount that the image pickup unit protrudes from the exterior housing, and the image projection device is stored. The size of the time will increase.

The present invention has been made in view of the above problems, and an object thereof is to provide the following image projection apparatus.
An image projection apparatus including an imaging unit that reduces the angle of view of the lens of the imaging unit even when the projection image is enlarged and projected close to the projection surface while the storage size is compact. Thus, the image projection apparatus can capture an image with suppressed deterioration of the surrounding image.

  In order to achieve the above object, an invention according to claim 1 is an image projection apparatus including an imaging unit that captures a projection image that is enlarged and projected onto a projection surface, wherein the imaging unit is external to the image projection apparatus. A position perpendicular to the projection surface with respect to the housing is movably provided at a first position and a second position different from each other.

  The present invention is an image projection apparatus provided with an imaging unit, and the image of the lens of the imaging unit can be enlarged even when the projection image is enlarged and projected in close proximity to the projection surface while the size when stored is compact. It is possible to provide an image projection apparatus that can perform imaging while reducing the corners and suppressing deterioration of surrounding images.

The perspective explanatory view which looked at the projector when performing image projection on the screen based on one Embodiment from the back side. FIG. The arrangement explanatory view of the optical engine and the light source means for generating white light. Structure explanatory drawing of an optical engine. Structure explanatory drawing of an illumination optical system unit part and an image display element unit part. FIG. 3 is a configuration explanatory diagram of an image display element unit. FIG. 3 is a configuration explanatory diagram of a part of an illumination optical system unit, an image display element unit, and a projection optical system unit. The perspective explanatory view of a projection optical system unit part. Side surface explanatory drawing of a projection optical system unit part. Explanatory drawing of the expansion thermal radiation part which thermally radiates an image display element unit part. Explanatory drawing of a sirocco fan. Examples of lens configurations with different angles of view. Explanatory drawing of the relationship between the angle of view of a lens, and a projection image. FIG. 3 is an explanatory diagram of a state in which an emission unit cover of the projector is closed according to the first embodiment. Explanatory drawing of the example of the field angle of the lens of the camera of the state which closed the injection | emission part cover. FIG. 3 is an explanatory diagram of a state in which an emission unit cover of the projector is opened according to the first embodiment. Explanatory drawing of the example of the field angle of the lens of the camera of the state which opened the injection part cover. Explanatory drawing of the structure which supports the injection | emission part cover of Example 1 so that a linear movement is possible. FIG. 6 is an explanatory diagram of a state in which an emission unit cover of a projector is closed according to a second embodiment. Explanatory drawing of the example of the relationship between a field angle of the lens of the camera of the state which closed the injection | emission part cover, and a camera optical axis centerline, and a screen. Explanatory drawing of the state which opened the injection | emission part cover of the projector based on Example 2. FIG. Explanatory drawing of the example of the relationship between a field angle of the lens of the camera of the state which opened the injection | emission part cover, the camera optical axis centerline, and a screen. Explanatory drawing of the structure which supports the injection | emission part cover of Example 2 so that a movement to a circular arc shape is possible. Explanatory drawing of the example which provided the cleaning member which cleans the dust-proof glass provided in the injection | emission opening of the injection part in the injection part cover based on Example 3. FIG. The structure explanatory view of the injection part cover concerning a modification.

  Hereinafter, an embodiment in which the present invention is applied to a vertically placed type (hereinafter, referred to as a vertical type) and a short-focus image projection apparatus (hereinafter, referred to as a projector 1) will be described with reference to a plurality of examples and modifications. To do.

First, a basic configuration of the projector 1 according to the present embodiment and an outline of its operation will be described with reference to the drawings.
FIG. 1 is an explanatory perspective view of the projector 1 as viewed from the back side when performing image projection on the screen 100 according to the present embodiment. 2 is a perspective explanatory view of the projector 1, FIG. 2 (a) is an external perspective explanatory view seen from the rear side, and FIG. 2 (b) is a perspective explanation seen from the rear side oblique with the outer layer cover removed. FIG. 2 and FIG. 2C are perspective explanatory views as seen from the front side obliquely with the outer layer cover removed.

The projector 1 generates an image (video) based on video data input from an external device such as a personal computer or a video camera, and enlarges and projects the image as projection light onto a screen 100 as a projection surface. 100 is a device that generates a projected image on 100.
In recent years, a liquid crystal projector widely known as such an image projection apparatus has been developed to improve the resolution of a liquid crystal panel having light modulation means for modulating a light beam emitted from a light source lamp, which is a light source, into projection light. Improvements in brightness and price reductions are being made with higher efficiency.
Further, like the projector 1 of the present embodiment, a small and light image projection apparatus that uses a DMD (Digital Micro-mirror Device) as a light modulation means has become widespread. For this reason, image projection apparatuses are widely used not only in offices and schools but also at home.

  In particular, front type (front projection type) projectors have improved portability and are now being used for small meetings of several people. The projector is required to be able to project a projection image on a large screen (enlarge the projection screen) and to reduce the projection space required outside the projector as much as possible.

As shown in FIG. 1, on the upper surface of the housing cover 2 that is the exterior housing of the projector 1, an inclined portion formed so that the front side of the projector 1 that is the screen 100 side is lowered, and the apex of the inclined portion. A flat portion that is substantially parallel to the rear side in height is formed.
And the injection | emission part 50 in which the injection | emission opening 51 which is a projection opening which inject | emits a projection light in the surface substantially parallel to the inclination of an inclination part was formed is provided so that an inclination part and a plane part may be straddled, A dust-proof glass 52 is provided to prevent dust and the like from entering the housing cover 2 through the injection opening 51. Further, on the upper surface of the housing cover 2, an operation unit (not shown) for the user to operate the projector 1 is provided.

As will be described in detail later, the projector 1 according to the present embodiment has a transmission optical system such as the projection lens 21 set substantially parallel to the screen 100. Then, the light beam shown in FIGS. 2B and 2C is reflected by the folding mirror 23 and the free-form surface mirror 24, and the screen 100 passes through the exit opening 51 of the exit portion 50 shown in FIGS. 1 and 2A. (See FIG. 7).
With this configuration, the optical engine 6 shown in FIGS. 2B and 2C can be designed vertically and compactly in a three-dimensional manner.

Next, the configuration of each part and the schematic diagram of the operation will be described.
FIG. 3 is an explanatory diagram of the arrangement of the optical engine 6 and the light source means 7 for generating white light, FIG. 4 is an explanatory diagram of the configuration of the optical engine 6, and FIG. 5 is an illumination optical system unit 9 and an image display element unit 8. FIG. 6 is a diagram illustrating the configuration of the image display element unit 8. 7 is an explanatory diagram of a part of the illumination optical system unit unit 9, the image display element unit unit 8, and the projection optical system unit unit 10, and FIG. 8 is a perspective explanatory diagram of the projection optical system unit unit 10. These are side surface explanatory views of the projection optical system unit 10. FIG. 10 is an explanatory view of an enlarged heat radiating portion that radiates heat of the image display element unit portion 8, and FIG. 11 is an explanatory view of the sirocco fan 30. FIG. 12 is an example of a lens configuration with a different angle of view, and FIG. 13 is an explanatory diagram of the relationship between the angle of view of the lens 71 and a projected image (screen image).

As shown in FIG. 3, light source means 7 for generating white light is disposed on the side surface of the optical engine 6, specifically, on the side surface of the illumination optical system unit portion 9 included in the optical engine 6. As the light source means 7, a high pressure mercury lamp is employed. Then, the light from the light source means 7 is applied to the illumination optical system unit 9 of the optical engine 6.
The optical engine 6 includes a projection optical system unit 10 above the illumination optical system unit 9 and an image display element unit 8 below the illumination optical system unit 9.

As shown in FIG. 4, an opening is provided on the side of the illumination optical system unit 9 where the light source means 7 is disposed, and white light emitted from the light source means 7 in the direction of the arrow is split into RGB in the figure. Then, the dispersed light is guided to the image display element unit unit 8 disposed below.
The image display element unit 8 functions as modulation means that modulates projection light (forms an image) according to a modulation signal generated according to image information by a control unit (not shown).
The projection optical system unit 10 enlarges and projects the projection light modulated by the image display element unit 8 onto a projection surface such as the screen 100.

Further, the illumination optical system unit section 9 includes a color foil 11, a light tunnel 12, a relay lens 13, a cylinder mirror 15, and a concave mirror 14 as shown in FIG.
The color foil 11 converts the white light emitted from the light source means 7 into light that repeats each color of RGB every unit time by a disk-shaped color filter and emits the light. The light tunnel 12 is formed in a cylindrical shape by laminating plate glasses, and guides light emitted from the color foil 11 to the relay lens 13. The relay lens 13 is a combination of two lenses, and collects light while correcting axial chromatic aberration of light emitted from the light tunnel 12. The cylinder mirror 15 reflects the light emitted from the relay lens 13 toward the concave mirror 14, and the concave mirror 14 images the light reflected from the cylinder mirror 15 with a DMD element 16 described later. The light is condensed on the display element unit 8.

As shown in FIG. 6, the image display element unit 8 includes a DMD element 16, a DMD printed circuit board 17 that controls the DMD element 16, a heat sink 19 that cools the DMD element 16, and a fixing plate that presses the heat sink 19 against the DMD element 16. 18 and.
The DMD element 16 has a substantially rectangular mirror surface composed of a plurality of micromirrors. Each micromirror is driven in a time-sharing manner based on video data, thereby processing projection light so as to form a predetermined video ( Modulated) and reflected. Then, the light used by the plurality of micromirrors is projected onto the projection lens 21 of the projection optical system unit unit 10 shown in FIG. 7 based on the image data as shown in FIG. Light that is reflected as light and discarded is reflected to the OFF light plate 20.

As shown in FIGS. 8 and 9, the projection optical system unit section 10 includes a projection lens 21, an illumination housing 22 for attaching the projection lens 21 to the illumination optical system unit section 9, a folding mirror 23, and a free-form curved mirror 24. ing.
The projection lens 21 enlarges the projection light reflected by the image display element unit 8 via the illumination optical system unit 9, and the folding mirror 23 directs the optical path of the enlarged projection light toward the free-form surface mirror 24. Let it wrap. The free-form surface mirror 24 further enlarges the projection light whose optical path is turned back by the turning mirror 23 and reflects it toward the screen 100.
Thus, the projection light modulated based on the image data by the image display element unit unit 8 is enlarged and projected onto the screen 100.
By including the optical engine 6 having the above-described configuration, the projector 1 can be disposed close to the screen 100, can be designed vertically and has a small installation area, and can be three-dimensionally compact.

The image display element unit 8 described with reference to FIGS. 5 and 6 includes a sirocco fan 30 for efficiently exhausting the heat of the heat sink 19 that cools the DMD element 16, as shown in FIG. Is provided. This sirocco fan 30 forcibly blows heat to the heat radiating fin portion of the heat sink 19 to enhance the heat radiating effect of the heat sink 19. In the projector 1 of this embodiment, a thin fan with a wide discharge port is used. ing.
As shown in FIG. 11, the sirocco fan 30 has a configuration in which a flow having a high wind speed is concentrated on an end side indicated by an arrow in the drawing, among wide outlets. For this reason, the wind speed of the cooling air to be discharged is not uniform over the entire discharge port, and there are places where the wind speed is fast and places where the wind speed is slow.

  Further, the projector 1 according to the present embodiment includes a control unit (not shown), and performs image processing based on image data from an external device and input information from an operation unit (not shown). A control unit for controlling the operation is provided. The control unit includes a ROM (ROM) that stores a program for performing image processing and operation control of each unit, and among the programs recorded in the ROM, necessary subroutines, input information from the operation unit, and data from an external device Has a storage device such as a RAM. Based on the input information from the operation unit and the program in the ROM, the ROM and RAM are controlled, and a CPU (central processing unit) that performs calculations for controlling each unit is also provided. The driver unit is controlled and each part is controlled.

  Further, as shown in FIG. 1 and the like, the projector 1 according to the present embodiment includes a camera 70 including an electronic image sensor that is an imaging unit that captures a projection image projected on the screen 100. Using the camera 70, the projector 1 according to the present embodiment captures a test pattern when the projector 1 is installed, corrects the keystone of the projected image, or projects on the screen 100 that changes due to the influence of external light. The color balance of the image is adjusted. Further, by storing the option program in a storage device such as a RAM of the control unit of the projector 1, what is in the projection area of the projection image projected on the screen 100 is detected and transmitted to an external device, It is also possible to perform operation 1.

However, as shown in FIG. 1, the projector 1 can be disposed close to the screen 100 or the like that is a projection surface. When the projector 1 is disposed close to the projector 1, The angle of view of the lens 71 included in the camera 70 must be increased.
For example, as shown in FIGS. 12A and 12B, it is necessary to use a so-called wide-angle lens. In general, as the angle of view of a wide-angle lens increases, aberrations such as spherical aberration of the lens increase as compared with a lens having a standard angle of view.

  Further, in order to reduce aberrations such as spherical aberration of the lens as much as possible, the lens configuration tends to be complicated as shown in FIGS. As the angle of view increases, for example, the wide-angle lens of FIG. 12B having a larger angle of view increases the number of lenses constituting the angle of view than the wide-angle lens of FIG. 12A having a relatively small angle of view. At the same time, the size in the optical axis direction also increases. For these reasons, the cost increases as the angle of view of the lens 71 increases.

Further, when the projector 1 is disposed close to the screen 100 or the like, when a picture is taken with a wide-angle lens having a relatively small angle of view, a part of the screen image that is a projection image is a camera frame of the camera 70 as shown in FIG. In some cases, the image pickup element protrudes from the image pickup surface. On the other hand, if a wide-angle lens with a large angle of view captures an image, the entire screen image can be accommodated within the camera frame, but the distortion of the peripheral image increases by the amount of the angle of view.
As the angle of view increases, the captured peripheral image deteriorates when the projection area of the projected image enlarged and projected from near the projection surface is imaged. If it deteriorates in this way, the accuracy when controlling the projector 1 based on the captured image information may be reduced, or the accuracy of the image information transmitted to an external device such as a personal computer may be reduced.

  In addition, the projector 1 is usually installed at a position that does not block the field of view of the person viewing the projection image, and the screen 100 and the imaging surface of the camera 70 are often not parallel. For this reason, blurring proportional to the deviation in the lens optical axis direction from the projection distance of each location on the screen 100 and the above-described distortion occur in the image formed on the imaging surface, and the peripheral image further deteriorates.

Further, as in the conventional configuration (for example, the configuration described in Patent Document 1), the imaging unit is projected from the exterior housing so that the distance between the lens of the camera and the projection surface is increased, and the lens of the imaging unit is A method of reducing the angle of view as much as possible is also conceivable.
However, in the conventional configuration in which the imaging unit is fixedly provided on the exterior casing, the space occupied by the image projection apparatus when image projection is not performed is increased by the amount by which the imaging unit is protruded from the exterior casing. The size when the image projection apparatus is stored becomes large.

Therefore, the present embodiment aims to provide the following projector 1. Even when the camera 70 is provided and the storage size is made compact, and the projection image is enlarged and projected close to the screen 100 or the like, the angle of view of the lens 71 of the camera 70 is reduced to deteriorate the surrounding image. This is a projector 1 that can take an image with reduced noise.
Hereinafter, a plurality of examples and modifications will be described as specific examples of the projector 1 to which the present invention is applied. Here, the projector 1 of each embodiment and the modified example is characterized in that the camera 70 is movably provided with respect to the housing cover 2 of the projector 1.
In the description of the projectors 1 of the embodiments and the modified examples, the same reference numerals are given to the same constituent members and the constituent members performing the same functions unless otherwise distinguished.

(Example 1)
Next, Example 1 of the present embodiment will be described with reference to the drawings.
The projector 1 according to the present embodiment is characterized in that the camera 70 is provided on a movable ejection unit cover 60 that covers and protects the ejection opening 51 and the dust-proof glass 52 of the ejection unit 50 during storage. ing. That is, the camera 70 is attached to the injection unit cover 60 as a holding member that holds the camera 70 so that the position in the direction perpendicular to the screen is movable between the first position and the second position that are different from each other. The feature is that it is held.

  FIG. 14 is an explanatory diagram of a state in which the emission unit cover 60 of the projector 1 is closed according to the present embodiment. FIG. 15 is an explanatory diagram of an example of the angle of view (horizontal angle of view) of the lens 71 of the camera 70 in a state in which the ejection unit cover 60 is closed, so that the positional relationship between the camera 70 and each unit of the ejection unit 50 can be easily understood. 5 shows a state in which it passes through the injection opening 51 and the dust-proof glass 52 of the injection unit 50. FIG. 16 is an explanatory diagram of the projector 1 according to the present embodiment in a state in which the ejection unit cover 60 is opened, and FIG. 17 is an angle of view (horizontal field angle) of the lens 71 of the camera 70 in a state in which the ejection unit cover 60 is opened. ) Is an explanatory diagram of an example. FIG. 18 is an explanatory diagram of a configuration that supports the injection unit cover 60 of this embodiment so as to be linearly movable (slidable).

As described above, in the projector 1 according to the present embodiment, the camera 70 is provided on the movable ejection unit cover 60 that covers and protects the ejection opening 51 and the dustproof glass 52 of the ejection unit 50 during storage.
As shown in FIG. 14, the position of the camera 70 when the ejection unit cover 60 is moved to the cover closed position that covers the ejection opening 51 and the dust-proof glass 52 of the ejection unit 50 when the projector 1 is stored is the position of the camera 70. This is the first position (hereinafter referred to as the cover closed position). In the cover closed position, the camera 70 does not capture a projected image on the screen 100.
Further, in the cover closed position, the emission unit cover 60 that is a holding member that holds the camera 70 is substantially contained in the grounding area of the housing cover 2 of the projector 1, and the projector 70 can be accommodated by providing the camera 70. It is the structure which can suppress increasing the size of time.
Note that the horizontal angle of view required to capture the entire projected image on the screen 100 with the lens 71 of the camera 70 in the cover closed position is about 135 ° as shown in FIG. .

On the other hand, as shown in FIG. 16, during image projection by the projector 1, that is, the cover open position of the injection unit cover 60 that exposes the injection opening 51 and the dustproof glass 52 of the injection unit 50 is the second position of the camera 70 (hereinafter, Cover open position). A projected image on the screen 100 is captured by the camera 70 at the cover open position.
Further, in the cover open position, the emission unit cover 60 that is a holding member that holds the camera 70 is located in a direction perpendicular to the screen 100 where the camera 70 is provided from the grounding area of the housing cover 2 of the projector 1. It is the structure which protrudes outside so that it may distance.
Specifically, the emission unit cover 60 is in a cover closed position, which is a first position when the camera 70 does not capture a projected image, and a second position when an image is captured, with respect to the housing cover 2 of the projector 1. It is provided so as to be slidable substantially linearly at a certain cover open position.
Then, as shown in FIG. 17, the horizontal angle of view required for capturing the entire projected image on the screen 100 with the lens 71 of the camera 70 in the cover open position is about 127 °. .

By configuring as described above, the following effects can be achieved.
Even when the projector 1 is arranged close to the screen 100 and projects a large projected image on the screen 100, the camera 70 (the emission unit cover 60) is moved from the cover closed position to the cover open position only when image projection is performed. It can be moved and image projection can be taken. That is, only when the image is projected and the projected image is captured, the projected image can be captured while the distance between the screen 100 and the lens 71 of the camera 70 in the direction perpendicular to the screen 100 is increased. For this reason, unlike the conventional image projection apparatus in which the position of the camera 70 does not move, when the image projection is not performed, the camera 70 (the emission unit cover 60) is set to the cover closed position that does not protrude from the grounding area of the housing cover 2. Can be positioned. The projector 1 can be stored compactly by being positioned in the cover closed position in this way.

Then, only when the image projection is performed and the image is taken, the camera 70 (emitter cover 60) is moved (positioned) to the cover open position protruding from the grounding area of the housing cover 2. By moving in this way, the distance between the screen 100 in the direction perpendicular to the screen 100 and the lens 71 of the camera 70 can be made larger than when it is in the cover closed position.
Therefore, when the image projection is not performed, the space occupied by the projector 1 can be made compact, and the angle of view of the lens 71 of the camera 70 can be reduced to reduce the spherical aberration of the lens when performing imaging.
Therefore, the image projector provided with the camera 70 can provide the following projector 1. Even when the projection image is enlarged and projected close to the screen 100 while the storage size is made compact, the angle of view of the lens 71 of the camera 70 can be reduced to suppress the deterioration of the surrounding image. This is a projector 1.

As described above, in the projector 1, the angle of view (horizontal angle of view) of the lens 71 of the camera 70 required for capturing the entire projected image on the screen 100 is set to be higher than the cover closed position (135 °). The cover is configured to be small at the open position (127 °).
With this configuration, high-accuracy imaging with the camera 70 becomes possible, and the number of lenses 71 of the camera 70 can be reduced to reduce the size of the camera 70. Further, the material cost can be reduced and the projector 1 can be reduced. Can also be provided.
When the projector 1 is not used, the space occupied by the projector 1 can be reduced and the projector 1 can be stored compactly.

Here, a configuration example in which the emission unit cover 60 (camera 70) is provided so as to be linearly slidable with respect to the housing cover 2 of the projector 1 will be described with reference to FIG.
As shown in FIGS. 18A and 18C, the projector cover 60 of the projector 1 according to the present embodiment is a flat surface that covers the injection opening 51 and the dust-proof glass 52 of the injection unit 50 inclined so that the screen 100 side is lowered. It has the sealing part 61 which is. Moreover, it also has two cover side surface parts 62 orthogonal to this sealing part 61 and parallel to the sliding direction. Then, when the injection unit cover 60 slides linearly to the cover open position shown in FIG. 18B, the screen 100 moves away from the screen 100 side in the vicinity of the end of the sealing unit 61 of the injection unit cover 60. The lens 71 of the camera 70 faces the side.

On the other hand, a linear guide 54a is provided in a portion where the cover side surface portion 62 of the injection unit cover 60 of the injection unit 50 formed on the upper portion of the housing cover 2 is fitted, and the injection unit cover 60 is slid linearly. I support it as possible.
Specifically, the injection portion side surface 53 of the injection portion cover 60 facing the inner wall surface of the cover side surface portion 62 has a linear shape formed in a substantially linear shape as shown in FIGS. A guide groove 55a is formed. In addition, in the portion where the planar sliding end 66a formed in a substantially planar shape which is an end parallel to the sealing portion 61 of the injection portion side surface portion 53 is slid, a planar sliding formed in a substantially planar shape is provided. A moving surface 56a is formed.
Then, as shown in FIG. 18 (c), the engagement protrusion 65 provided on the inner wall surface of the cover side surface portion 62 engages with the linear guide groove 55 a of the injection portion side surface portion 53, and the injection portion side surface portion. The planar sliding end 66a of the injection unit cover 60 slides on the 53 planar sliding surface 56a. With this configuration, the injection unit cover 60, that is, the camera 70 is supported so as to be slidable (movable) in a substantially straight line with respect to the housing cover 2 (injection unit 50).

As described above, the projector 1 according to the present embodiment modulates light emitted from the high-pressure mercury lamp included in the light source unit 7 into projection light based on a still image or video input from an external device such as a personal computer. An image display element unit section 8 is provided.
According to this, as explained in the above embodiment, the following effects can be obtained.
Even in the projector 1 including the image display element unit unit 8 that modulates light emitted from the high-pressure mercury lamp into projection light, the angle of view of the lens 71 used in the camera 70 can be reduced while reducing the size when housed. Therefore, it is possible to take an image while suppressing deterioration of the peripheral image.

In the projector 1 according to the present embodiment, the holding member that holds the camera 70 covers the emission opening 51 from which the projection light is emitted when the cover is in the closed position, and the emission opening 51 when the cover is in the cover open position. The injection part cover 60, which is a cover member that exposes the surface, was used.
By configuring in this way, the following effects can be achieved.
Dust, dust or the like enters from the exit opening 51 to contaminate the projection optical member of the projector 1, or dust or dirt adheres to the dustproof glass 52 which is a transparent dustproof sealing member that seals the exit opening 51. It is possible to suppress the loss of the ejection unit cover 60 that prevents the The structure that supports the ejection unit cover 60 so as to be movable between the cover closed position and the cover open position and the structure that supports the camera 70 so as to be movable between the first position and the second position can be used together. 1 can contribute to cost reduction.

(Example 2)
Next, Example 2 of the present embodiment will be described with reference to the drawings.
In the projector according to the first embodiment, the camera 70 (emitter cover 60) is provided so as to be slidable (movable) linearly with respect to the housing cover 2 of the projector 1. On the other hand, the projector 1 according to the present embodiment is different only in that the camera 70 is provided so as to be movable in a substantially arc shape with respect to the housing cover 2 of the projector 1.
Therefore, the configuration similar to that of the first embodiment and the effects thereof will be omitted as appropriate.

  FIG. 19 is an explanatory diagram of the projector 1 according to the present embodiment in a state in which the emission unit cover 60 is closed, and FIG. 20 is a view angle (vertical field angle) of the lens 71 of the camera 70 in a state in which the emission unit cover 60 is closed. ) And an optical axis center line of the camera and an example of the relationship between the screen 100. FIG. 21 is an explanatory diagram of the projector 1 according to the present embodiment in a state in which the ejection unit cover 60 is opened, and FIG. 22 is an angle of view (vertical field angle) of the lens 71 of the camera 70 in a state in which the ejection unit cover 60 is opened. ) And an optical axis center line of the camera and an example of the relationship between the screen 100. FIG. 23 is an explanatory diagram of a configuration for supporting the injection unit cover 60 of this embodiment so as to be movable in an arc shape.

As shown in a perspective view of the injection unit cover 60 in FIG. 19 with the injection unit cover 60 closed, the end of the cover side surface 62 of the injection unit cover 60 on the side of the housing cover 2 is formed in a substantially arc shape, as will be described in detail later. Has been.
In this state, that is, the injection unit cover 60 positioned at the cover closed position is substantially within the grounding area of the housing cover 2 of the projector 1 as in the first embodiment, and the projector 1 is provided by providing the camera 70. It is the structure which can suppress enlarging the size at the time of storing.
When the projector 1 in this state is viewed from the side, it is as shown in FIG. 20, and when the projector 1 is disposed close to the screen 100, the camera optical axis center line that is the optical axis of the lens 71 of the camera 70. May cross over the upper end of the screen 100.

Specifically, when the projector 1 is disposed close to the screen 100, the center of the camera optical axis of the camera 70 held on the sealing portion 61 of the emission unit cover 60 that forms an angle of about 75 ° with the screen 100. There is a possibility that the line (optical axis) does not shine near the center of the screen 100.
Further, the angle of view (vertical angle of view) of the lens 71 of the camera 70 may not cover the screen 100.
Here, the angle between the camera optical axis center line of the camera 70 and the screen 100 in the above state is defined as θa.

In order to suppress the occurrence of these problems, the injection unit cover 60 is arranged so that the camera optical axis center line of the camera 70 shines near the center of the screen 100 when the injection unit cover 60 is positioned at the cover open position. It is necessary to provide the camera 70 on the sealing portion 61.
However, in the configuration in which the camera 70 (the emission unit cover 60) is slid linearly with respect to the housing cover 2 of the projector 1 as in the first embodiment, it is assumed that the camera 70 (the emission unit cover 60) is located at either the cover closed position or the cover open position. However, the angle formed by the camera optical axis center line and the screen 100 is the same.
In the same configuration as described above, when the camera optical axis center line of the camera 70 shines near the center of the screen 100, the lens 71 of the camera 70 protruding above the housing cover 2 when the projector 1 is housed. The area of the part also increases. When the area increases in this way, there is an increased possibility that the lens 71 of the camera 70 may be damaged or damaged due to a collision with the storage.

In order to reduce the possibility of the lens 71 of the camera 70 being damaged or broken, an angle θa formed by the camera optical axis center line and the screen 100 when the emitting unit cover 60 is positioned at the cover closed position is set as much as possible. It needs to be small. In addition, when the emission unit cover 60 is positioned at the cover open position, it is necessary to configure the camera optical axis center line to shine near the center of the screen 100.
Further, when the camera 70 (emitter cover 60) is positioned at the cover open position, that is, when the projected image on the screen 100 is captured, the smaller the angle formed between the screen 100 and the camera optical axis center line, the more The risk of occurrence of such problems is also increased. The blur or distortion proportional to the deviation in the lens optical axis direction from the projection distance of each location on the screen 100 is generated in the image formed on the imaging surface of the camera 70, and the peripheral image is further deteriorated. .

As a configuration for solving such a problem, for example, a configuration in which the camera 70 is provided so as to be rotatable with respect to the emission unit cover 60 so that the angle of the camera optical axis center line with respect to the screen 100 can be adjusted.
In addition, the guide groove formed in the guide portion of the emitting portion 50 is connected by the two straight portions and the small curved portion so that the angle of the camera optical axis center line with respect to the screen 100 approaches 90 ° in the vicinity of the cover open position. Such a configuration is also conceivable. That is, guide members having two linear shapes with different angles with respect to the housing cover 2 are provided, and engaging portions that respectively engage with these linear shapes are provided on the holding member, and the cover closed position and the cover open position are provided. The structure which moves the injection | emission part cover 60 between can also be considered.

  However, in the configuration in which the camera 70 is provided so as to be rotatable, it is necessary for the user to adjust the angle (position adjustment) of the camera, which may impair the operability of the projector 1, that is, the operability by the user. Further, if the guide groove formed in the guide part of the injection part 50 is connected by two linear parts and a small curved part, the operation of moving the injection part cover 60 cannot be smoothed, resulting in malfunctions and the like. There is also a risk of not moving unless a large force is applied. For these reasons, the operability by the user may be reduced.

Therefore, in the projector 1 according to the present embodiment, as described above, the end of the cover side surface 62 of the injection unit cover 60 on the side of the housing cover 2 is formed in a substantially arc shape, and the injection unit cover 60 is moved from the cover closed position. When moving to the cover open position, it is configured to move in an arc shape.
Specifically, as shown in FIG. 22, an arcuate guide 54b having a substantially arcuate guide portion is provided on the injection portion side surface portion 53, and the injection portion cover 60 is arcuate from the cover closed position to the cover open position. The guide 54b is configured to be guided along a substantially arc shape. By being guided along the substantially arc shape in this way, the angle formed by the sealing portion 61 of the injection portion cover 60 and the screen 100 is changed from about 75 ° at the cover closed position to about 61 ° at the cover open position. Can be changed.

By configuring as described above, the screen can be provided without the camera 70 being rotatably provided or configured such that the guide groove formed in the guide portion of the injection portion 50 is connected by two linear portions and a small curved portion. It is possible to configure the camera optical axis center line to shine near the center of 100. That is, when the camera 70 (emitter cover 60) is in the cover open position, the angle of view (vertical angle of view) of the lens 71 of the camera 70 can also cover the screen 100.
Therefore, θa when the camera 70 is in the cover closed position is made as small as possible to reduce the area of the lens 71 portion of the camera 70 protruding above the housing cover 2, and the lens 71 of the camera 70 is damaged, It is possible to reduce the risk of breakage. At the same time, when the camera 70 is positioned at the cover open position by guiding it in an arc shape, the screen 100 and the camera optical axis center line are aligned so that the camera optical axis center line shines near the center of the screen 100. It is possible to make the formed angle θb larger than θa.
By configuring in this way, it is possible to move between the first position and the second position with different angles by a smooth operation by configuring the arc-shaped guide 54b to move along the substantially arc shape, resulting in malfunction. And the operability is improved because it can be moved with a small force.

The angle formed between the screen 100 and the camera optical axis center line of the camera 70 is when the camera 70 (emitter cover 60) is positioned at the cover open position rather than θa when the camera 70 (emitter cover 60) is positioned at the cover closed position. It can be configured such that θb is larger, that is, close to a right angle.
With this configuration, the closer the angle formed by the screen 100 and the camera optical axis center line of the camera 70 is to a right angle, the smaller the focal depth the lens can be used, and the less distortion of the surrounding image is suppressed. Imaging can be performed.

Here, a configuration example in which the camera 70 (the emission unit cover 60) is provided so as to be movable (slidable) in a substantially arc shape with respect to the housing cover 2 of the projector 1 will be described with reference to FIG.
As shown in FIGS. 23A and 23C, the projection unit cover 60 of the projector 1 according to the present embodiment is a plane unit that covers the projection opening 51 and the dustproof glass 52 of the projection unit 50 that is inclined so that the screen 100 side is lowered. It has the sealing part 61 which is. Moreover, it also has two cover side surface parts 62 orthogonal to this sealing part 61 and parallel to the sliding direction. Then, when the injection unit cover 60 slides in an arc shape in the cover open position shown in FIG. 23B, the screen 100 moves away from the screen 100 side in the vicinity of the end of the sealing unit 61 of the injection unit cover 60. The lens 71 of the camera 70 faces the side.

On the other hand, an arcuate guide 54b is provided in a portion where the cover side surface portion 62 of the injection unit cover 60 fits in the injection unit 50 formed on the upper portion of the housing cover 2, and the injection unit cover 60 is formed in an arc shape. It is slidably supported.
Specifically, an arcuate guide groove having a substantially arc shape as shown in FIGS. 23 (b) and 23 (c) is formed in the injection portion side surface 53 of the injection portion cover 60 facing the inner wall surface of the cover side surface portion 62. 55b is formed. Further, an arcuate sliding surface 56b is formed at a portion where the arcuate sliding end 66b which is an end parallel to the sealing portion 61 of the injection portion side surface portion 53 shown in FIG. Yes.
And as shown in FIG.23 (c), while the engagement protrusion 65 provided in the inner wall face of the cover side part 62 engages with the circular arc guide groove 55b of the injection part side part 53, an injection part side part The arcuate sliding end 66b of the injection portion cover 60 slides on the arcuate sliding surface 56b of 53. With this configuration, the injection unit cover 60, that is, the camera 70 is supported so as to be slidable in an arc shape with respect to the injection unit 50 formed on the housing cover 2.

Further, in the projector 1 of this embodiment, when the emission unit cover 60 is in the cover open position as described above, the angle of view (vertical angle of view) of the lens 71 of the camera 70 covers the screen 100 that is the projection surface. Is possible. In other words, when the injection unit cover 60 is in the cover open position, the entire image, which is the entire projected image that is enlarged and projected on the screen 100, is configured to fall within the angle of view of the lens 71 included in the camera 70. Yes.
With this configuration, the entire image (video) enlarged and projected on the screen 100 can be captured, and more advanced control of the projector 1 can be performed, or the amount of information transmitted to an external device such as a personal computer can be increased. .

(Example 3)
Next, Example 3 of the present embodiment will be described with reference to the drawings.
In the projectors according to the first and second embodiments and the projector 1 according to the present embodiment, a cleaning brush is used as a cleaning member that cleans the dust-proof glass 52 included in the ejection portion 50 on the ejection portion cover 60 of the projector 1 according to the present embodiment. The only difference is that 67 is provided.
Therefore, the same configuration as the first and second embodiments and the effects thereof will be omitted as appropriate. The cleaning brush 67 according to the present embodiment can be provided in any of the projectors according to the first and second embodiments, and an example in which the cleaning brush 67 is provided in the projector according to the second embodiment will be described.
FIG. 24 is an explanatory diagram of an example in which a cleaning brush 67 that is a cleaning member for cleaning the dust-proof glass 52 provided in the injection opening 51 of the injection unit 50 is provided in the injection unit cover 60 according to the present embodiment.

As shown in FIG. 24, a dust-proof glass 52, which is a transparent member for dust protection, is provided in the injection opening 51 of the injection unit 50. However, since the external surface of the dust-proof glass 52 faces upward, dust, dust, or the like is exposed to the surface of the dust-proof glass 52 when the projection cover 60 is positioned at the cover open position and image projection is performed. May accumulate on the surface and get dirty.
Therefore, in the projector 1 of the present embodiment, as shown in FIG. 24, when the injection unit cover 60 moves, a cleaning member that cleans the surface of the dust-proof glass 52 at the end facing the dust-proof glass 52 in a close state. The cleaning brush 67 is provided. The cleaning brush 67 is preferably a type of cleaning brush that removes dust or dirt accumulated on the surface of the dust-proof glass 52 by static electricity generated on the brush portion that slides on the surface of the dust-proof glass 52. Can be used.

Then, the cleaning brush 67 is provided in the projector 1 that repeats image projection and storage, and in accordance with the operation of the injection unit cover 60 that is moved to the cover closed position and the cover open position for each image projection and storage. It slides on the surface of the dustproof glass 52. By sliding in this manner, dust or dust accumulated on the dust-proof glass 52 can be scraped off by the cleaning brush 67, and dust and dust can be adsorbed and cleaned by the generated static electricity.
Therefore, since the surface of the dust-proof glass 52 can be cleaned each time by the opening / closing operation of the injection unit cover 60 performed before and after the image projection, the surface of the dust-proof glass 52 when performing the image projection can be maintained in a clean state, which is favorable. Image projection.

(Modification)
Next, a modification of the present embodiment will be described with reference to the drawings.
The projectors according to the first to third embodiments are different from the projector 1 according to the present modification only in the following points. In the projectors according to the first to third embodiments, the camera 70 (the emission unit cover 60) is configured to move (slide) in a linear shape or an arc shape, whereas in the projector 1 of the present modification, the camera 70 is rotated. It is a point related to being provided so as to be movable.
Therefore, the configuration similar to that of the first to third embodiments and the effects thereof will be omitted as appropriate.
FIG. 25 is an explanatory diagram of a configuration of the injection unit cover 60 according to this modification.

  As shown in FIGS. 25A and 25B, in the projector 1 according to the present modification, the housing cover 2 is a hinge part that rotatably supports the injection unit cover 60 between the cover closed position and the cover open position. 58. The injection unit cover 60 has a hinge engaging portion 68 that fits into the hinge portion 58. In the projector 1 of the present modification, the hinge portion 58 has a shaft member, and the hinge engaging portion 68 is fitted to the shaft member, so that the hinge member 58 is rotatably supported. The injection unit cover 60 is provided with a lens 71 of the camera 70 at a portion facing the housing cover 2 in the vicinity of the end portion on the side away from the hinge portion 58 when the injection unit cover 60 is in the cover closed position.

That is, the injection unit cover 60 that holds the camera 70 is rotatably supported. The camera 70 is in the vicinity of the end of the ejection portion cover 60 on the side away from the rotation axis of the hinge portion 58 and is located at the cover closed position, and the lens 71 is opposed to the housing cover 2. It is provided at the position of the part cover 60.
With this configuration, the cleaning brush 67 for cleaning the dust-proof glass 52 cannot be provided on the injection unit cover 60 as in the third embodiment, but the following effects can be achieved.
When the injection unit cover 60 is in the cover closed position, the lens 71 of the camera 70 can be protected.

In the present embodiment, the present invention has been described with respect to an example in which the camera 70 is provided on the movable injection unit cover 60 that covers and protects the injection opening 51 and the dust-proof glass 52 of the injection unit 50 during storage. It is not limited to such a configuration. For example, the camera 70 is replaced with the injection unit cover 60 described in each of the embodiments and the modified examples, and the camera 70 is configured to be a holding member that holds the camera 70 movably or a movable holding member that holds other things. Is also applicable.
In the present embodiment, an example in which the present invention is applied to the projector 1 that projects an image such as a moving image or a still image on the screen 100 based on image information input from an external device such as a personal computer has been described. Is not limited to such a configuration. For example, the image information recorded on the SD card (registered trademark) is read by the apparatus body and projected onto the screen 100 or the like, or the image recorded on the OHP sheet or the like is projected onto the screen 100 or the like. It can also be applied to head projectors.

What has been described above is merely an example, and the present invention has a specific effect for each of the following modes.
(Aspect A)
In an image projection apparatus such as a projector 1 that includes an imaging unit such as a camera 70 that captures an enlarged projection image on a projection surface such as a screen 100, the imaging unit includes a housing cover 2 and the like of the image projection apparatus. The position in the direction perpendicular to the projection surface with respect to the external housing is provided to be movable between a first position such as a cover closed position and a second position such as a cover open position, which are different from each other. To do.

According to this, as explained in the first embodiment (to 3 and the modified example), the following effects can be obtained.
Even when the image projection device is arranged close to the projection surface and projects a large projection image on the projection surface, the image pickup means is moved between the first position and the second position only when image projection is performed. Thus, it is possible to capture a projected image by increasing the distance between the projection surface in the direction perpendicular to the projection surface and the lens. For this reason, unlike the image projection apparatus in which the position of the image pickup unit does not move, when the image projection is not performed, the image pickup unit is not protruded from the external housing of the image projection apparatus, for example, is positioned at the first position. Can be stored compactly. Then, only when the image is projected and imaged, the imaging means protrudes from the external housing of the image projection apparatus, for example, is positioned at the second position, and between the projection surface and the lens in the direction perpendicular to the projection surface. Can be made farther than when in the first position.

Therefore, when the image projection is not performed, the space occupied by the image projection apparatus can be made compact, and the angle of field of the lens used for the imaging unit can be reduced to reduce the spherical aberration of the lens when performing the imaging.
Therefore, an image projection apparatus provided with an image pickup unit can reduce the angle of view of the lens of the image pickup unit even when the projection image is enlarged and projected close to the projection surface while the storage size is compact. It is possible to provide an image projection apparatus that can be reduced in size and can capture an image with suppressed deterioration of the surrounding image.

(Aspect B)
In (Aspect A), a light beam such as light emitted from a light source such as a high-pressure mercury lamp included in the light source means 7 is used as projection light based on image information such as a still image or video input from an external device such as a personal computer. A light modulation means such as an image display element unit section 8 to be modulated is provided.
According to this, as explained in the first embodiment (to 3 and the modified example), the following effects can be obtained.
In an image projection apparatus such as the projector 1 that includes a light modulation unit that modulates the light beam emitted from the light source into projection light, the size of the lens such as the lens 71 used for the imaging unit such as the camera 70 is reduced while the storage size is compact. The angle of view can be reduced. Therefore, it is possible to take an image while suppressing deterioration of the peripheral image.

(Aspect C)
In (Aspect A) or (Aspect B), an angle formed by the projection surface such as the screen 100 and an optical axis such as a camera optical axis center line of the lens such as the lens 71 included in the imaging unit such as the camera 70 However, when the imaging means is positioned at the second position such as the cover open position (θb), it is closer to a right angle than when the imaging means is positioned at the first position such as the cover closed position (θa). It is characterized by this.

According to this, as described in the second embodiment (3 and the modified example), the following effects can be obtained.
The closer the angle formed by the projection surface and the optical axis of the lens included in the imaging means is to a right angle, the smaller the depth of focus the lens can be used, and the lower the distortion of the surrounding image can be. .

(Aspect D)
In any one of (Aspect A) to (Aspect C), the external casing such as the casing cover 2 (injection portion 50) is at least partially arcuately arcuate such as an arcuate guide groove 55b or an arcuate sliding surface 56b. A holding member such as an injection portion cover 60 that has a guide portion such as an arcuate guide 54b having a shape and holds the imaging means such as the camera 70 moves along the substantially arc shape of the guide member, The imaging means moves between the first position such as a cover closed position and the second position such as a cover open position.

According to this, as explained in the second embodiment (3), the following effects can be obtained.
For example, since it is configured as in (Aspect C), a configuration in which the imaging unit is rotatably held with respect to the holding member is conceivable, but the user operability may be reduced. Also, guide members having two linear shapes with different angles with respect to the outer casing are provided, and engaging portions that respectively engage with these linear shapes are provided on the holding member, so that the first position and the second position are The structure which moves a holding member between can be considered. However, in this configuration, since the engaging portion of the holding member is engaged with each of the two linear shapes and slides, the holding member cannot move smoothly or moves unless a large force is applied. There is a risk of not.
On the other hand, by configuring the holding member to be movable along the substantially arc shape of the guide member, it is possible to suppress a decrease in operability by the user. In addition, it is possible to move between the first position and the second position with a smooth operation, and it is possible to reduce malfunctions and to move with a small force, so that operability is improved.

(Aspect E)
In any one of (Aspect A) to (Aspect C), the external casing such as the casing cover 2 rotatably supports a holding member such as the ejection unit cover 60 that holds the imaging unit such as the camera 70. When the imaging means is located in the vicinity of the end portion on the side away from the rotation center such as the rotation axis of the hinge portion 58 of the holding member and is located at the first position such as the cover closed position, The lens such as the lens 71 is provided at a position of the holding member facing the exterior casing such as the casing cover 2.
According to this, as described in the above modification, the lens of the imaging unit can be protected when the imaging unit is in the first position.

(Aspect F)
In any one of (Aspect A) to (Aspect E), the holding member that holds the imaging unit such as the camera 70 projects projection light when the imaging unit is positioned at the first position such as a cover closed position. Is a cover member such as an injection unit cover 60 that covers the projection opening such as the injection opening 51 and the like and exposes the projection opening when the imaging means is positioned at the second position such as the cover open position. It is characterized by this.
According to this, as explained in the first embodiment (to 3 and the modified example), the following effects can be obtained.
Prevents dust, dust, etc. from entering from the projection port, dirts the projection optical member of the image projection apparatus, and prevents dust, dust, etc. from adhering to the transparent dustproof sealing member provided at the projection port. Loss of the cover member can be suppressed. And the structure which supports the cover member movably between the first position and the second position and the structure which supports the imaging means movably between the first position and the second position can be used together. Can contribute to lower costs.

(Aspect G)
In (Aspect F), a dustproof sealing member such as a transparent dustproof glass 52 that seals the projection opening such as the injection opening 51 is provided, and the holding member such as the injection portion cover 60 is cleaned with a cleaning brush 67 or the like. A dust-proof sealing member with the cleaning member when the imaging means such as the camera 70 is moved between the first position such as the cover closed position and the second position such as the cover open position. It is characterized by cleaning the surface of the.
According to this, as described in the third embodiment, the dust-proof sealing member can be cleaned each time by the opening and closing operation of the cover member performed before and after performing the image projection. The stop member can be maintained in a clean state, and good image projection can be performed.

(Aspect H)
In any one of (Aspect A) to (Aspect G), when the imaging unit such as the camera 70 is positioned at the second position such as the cover open position, the projection is enlarged and projected onto the projection surface such as the screen 100 The entire image falls within the angle of view of the lens such as the lens 71 included in the imaging unit.
According to this, as described in the second embodiment (3 and the modified example), the entire projection image enlarged and projected on the projection surface can be picked up, and a more advanced control of the image projection apparatus can be performed. It is possible to increase the amount of information transmitted to external devices such as.

DESCRIPTION OF SYMBOLS 1 Projector 2 Case cover 6 Optical engine 7 Light source means 8 Image display element unit part 9 Illumination optical system unit part 10 Projection optical system unit part 11 Color foil 12 Light tunnel 13 Relay lens 14 Concave mirror 15 Cylinder mirror 16 DMD element 17 Print Substrate 18 Fixed plate 19 Heat sink 20 OFF light plate 21 Projection lens 23 Folding mirror 24 Free-form mirror 30 Sirocco fan 50 Ejection portion 51 Ejection opening 52 Dust-proof glass 53 Ejection portion side surface portion 54a Linear guide 54b Arc-shaped guide 55a Linear guide groove 55b Arc-shaped guide groove 56a Flat sliding surface 56b Arc-shaped sliding surface 58 Hinge portion 60 Injection portion cover 61 Sealing portion 62 Cover side surface portion 65 Engagement protrusion 66a Planar sliding end 66b Arc-shaped sliding end 67 Cleaning Brush 68 hinge engaging section 70 camera 71 lens 100 Screen

JP 2011-002650 A

Claims (8)

In the image projection apparatus provided with the imaging means for imaging the projection image to be enlarged and projected on the projection surface,
The imaging means is provided such that a position in a direction perpendicular to the projection surface is movable to a first position and a second position different from each other with respect to the external housing of the image projection apparatus. An image projection device. The image projection apparatus according to claim 1,
An image projection apparatus comprising: a light modulation unit that modulates a light beam emitted from a light source into projection light based on image information. In the image projection device according to claim 1 or 2,
An angle formed by the projection surface and the optical axis of the lens included in the imaging unit is
2. An image projection apparatus according to claim 1, wherein when the imaging means is positioned at the first position, the position when the imaging means is positioned at the second position is closer to a right angle. In the image projection device according to any one of claims 1 to 3,
The outer casing has a guide portion having a substantially arc shape at least in part,
An image characterized in that the image pickup means moves between the first position and the second position by moving a holding member holding the image pickup means along a substantially arc shape of the guide member. Projection device. In the image projection device according to any one of claims 1 to 3,
The external housing supports a holding member that holds the imaging unit in a rotatable manner,
The imaging means is in the vicinity of the end portion on the side away from the rotation center of the holding member,
The image projection device according to claim 1, wherein the lens is provided at a position of the holding member facing the exterior casing when the lens is located at the first position. In the image projection device according to any one of claims 1 to 5,
The holding member for holding the imaging means is
When the imaging means is positioned at the first position, the projection port from which the projection light is emitted is covered,
An image projection apparatus, wherein the image projection unit is a cover member that exposes the projection port when the imaging unit is positioned at the second position. The image projection apparatus according to claim 6,
A transparent dustproof sealing member for sealing the projection opening;
The holding member has a cleaning member,
An image projection apparatus, wherein the cleaning member cleans the surface of the dustproof sealing member when the imaging means is moved between the first position and the second position. In the image projection device according to any one of claims 1 to 7,
An image projection apparatus characterized in that when the image pickup means is located at the second position, the entire projected image enlarged and projected on the projection surface falls within an angle of view of the lens provided in the image pickup means.

Images