WO2010067688A1

WO2010067688A1 - Projection device

Info

Publication number: WO2010067688A1
Application number: PCT/JP2009/069312
Authority: WO
Inventors: 貴之内山; 展宏藤縄
Original assignee: 株式会社ニコン
Priority date: 2008-12-10
Filing date: 2009-11-13
Publication date: 2010-06-17

Abstract

Provided is a projection device including: a projection unit having an optical system for projecting an image (P); a case (4) for containing the projection unit; a first plane arranged on the case (4) so as to function as a distance reference plane for defining the distance from a projection window (8) of the case (4) to a projection plane (G) onto which the image (P) is projected and as a first installation plane used when installing the case (4); and a second plane arranged on the case (4) which orthogonally intersects the first plane and functions as a second installation plane used when installing the case (4).

Description

Projection device

The present invention relates to a projection device that projects an image.

2. Description of the Related Art An image projection apparatus that can project an image on an installation surface of the apparatus is known (for example, see Patent Document 1).

JP 2007-310194 A

By the way, the image projection apparatus described in Patent Document 1 includes a mirror that reflects a projection image and a hinge that supports the mirror, so that the projection angle of the image can be changed by changing the mirror angle or the hinge height. The operation is complicated because it is necessary to adjust the focus and to adjust the focus of the optical system housed in the apparatus.

An object of the present invention is to provide a projection apparatus that can project an image with an easy operation without requiring various adjustments.

The projection apparatus of the present invention defines a projection unit including an optical system that projects an image, a housing that houses the projection unit, and a distance from a projection window included in the housing to a projection surface that projects the image. A first surface provided on the housing that functions as a distance reference plane and a first installation surface used when installing the housing, and the housing is installed perpendicular to the first surface. And a second surface provided on the housing functioning as a second installation surface that is sometimes used.

The projection apparatus of the present invention includes a projection unit including an optical system that projects an image, and a casing that houses the projection unit, and the projection unit projects an image projected onto a projection plane that projects the image. On the other hand, an enlargement / reduction process is performed by fixing one side close to the casing.

According to the projection apparatus of the present invention, it is possible to project an image with an easy operation without requiring various adjustments.

1 is a perspective view showing an external appearance of a projector according to a first embodiment. It is a perspective view which shows the 1st state at the time of the image projection of the projector which concerns on 1st Embodiment. It is a perspective view which shows the 2nd state at the time of the image projection of the projector which concerns on 1st Embodiment. It is sectional drawing which shows the structure inside the projection unit which concerns on 1st Embodiment. It is a perspective view which shows the expansion / contraction process at the time of the image projection of the projector which concerns on 1st Embodiment. It is sectional drawing which shows the structure inside the projection unit which concerns on 2nd Embodiment. It is a block diagram which shows the structure of the projector which concerns on 2nd Embodiment. It is a perspective view which shows the state at the time of the image projection of the projector which concerns on 2nd Embodiment. It is a perspective view which shows the 1st state at the time of the image projection of the projector which concerns on 3rd Embodiment. It is a perspective view which shows the 2nd state at the time of the image projection of the projector which concerns on 3rd Embodiment. It is sectional drawing which shows the structure inside another projection unit. It is a perspective view which shows the external appearance at the time of the projection of the image of the projector which concerns on 4th Embodiment. It is a perspective view which shows the external appearance at the time of the non-projection of the image of the projector which concerns on 4th Embodiment. It is sectional drawing which shows the structure inside the projector which concerns on 4th Embodiment. It is a perspective view which shows the external appearance at the time of the non-projection of the image of the projector which concerns on 5th Embodiment. It is a perspective view which shows the external appearance at the time of the projection of the image of the projector which concerns on 5th Embodiment. It is a perspective view which shows the external appearance at the time of the projection of the image of the projector which concerns on 6th Embodiment. It is a perspective view which shows the external appearance at the time of the non-projection of the image of the projector which concerns on 6th Embodiment. It is a figure explaining the gravity center position of the cover with which the projector which concerns on 6th Embodiment is provided. It is another figure explaining the gravity center position of the cover with which the projector which concerns on 6th Embodiment is provided. It is a perspective view which shows the external appearance at the time of the projection of the image of the projector which concerns on 7th Embodiment.

Hereinafter, a projection apparatus according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing an external appearance of a projector 2 as a projection apparatus according to the first embodiment. As shown in FIG. 1, the projector 2 includes a housing 4 made of metal or plastic, and a projection window 8 of a projection unit 30 (see FIG. 4) built in the housing 4 is provided on the front surface 6 of the housing 4. Is provided. On the upper surface 10 of the projector 2, a power switch 12 and an operation unit 14 for setting various functions are provided. Various input terminals, cooling air vents, and the like (not shown) are provided on the side surface of the housing 4.

FIG. 2 is a perspective view showing a first state when the projector 2 projects an image. As shown in FIG. 2, the projector 2 is installed upright so that the lower surface, which is the surface facing the upper surface 10 of the housing 4, is in contact with the horizontal plane G. Further, the projection light is projected obliquely downward from the projection window provided on the front surface of the housing 4, and the projection image P is projected on the horizontal plane G. The horizontal plane G is a horizontal or substantially horizontal surface such as a desk surface.

Here, the lower surface of the housing 4 functions as an installation surface used when installing the housing 4 and is a projection surface of the projection image P from the projection window 8 provided on the front surface 6 of the housing 4. It also functions as a distance reference plane that defines the distance to the horizontal plane G. That is, when the housing 4 is installed on the horizontal plane G with the lower surface down, the distance from the projection window 8 provided on the front surface 6 of the housing 4 to the placement surface G is uniquely determined. At this time, the lower surface of the housing 4 as the distance reference plane and the horizontal plane G as the projection plane on which the projection image P is projected are parallel to each other. In this way, the projection distance of the image by the projector 2 is uniquely determined so that the optical member in the projection unit 30 described later can form a clear projection image at a position separated by the projection distance. Further, the projection unit 30 is fixed in advance at a predetermined position.

FIG. 3 is a perspective view showing a second state when an image is projected by the projector 2 as the projection apparatus according to this embodiment. As shown in FIG. 3, the projector 2 is installed such that the rear surface facing the front surface 6 of the housing 4 is in contact with the horizontal plane G, and the lower surface is in contact with the wall surface H that is a plane perpendicular to the horizontal plane G. ing. Further, the projection light is projected obliquely upward from the projection window provided on the front surface of the housing 4, and the projection image P is projected on the wall surface H.

Here, the rear surface of the housing 4 functions as an installation surface used when the housing 4 is installed, and the lower surface of the projection image P from the projection window 8 provided on the front surface 6 of the housing 4. It functions as a distance reference plane that defines the distance to the wall surface H that is the projection plane. That is, the casing 4 is installed on the horizontal plane G with the rear side down, and the bottom surface is in contact with the wall surface H, so that the projection window 8 provided on the front surface 6 of the casing 4 can be changed to the wall surface. The distance to H is uniquely determined. At this time, the lower surface of the housing 4 as the distance reference surface and the wall surface H as the projection surface on which the projection image P is projected are parallel to each other. Thus, also when the housing 4 is installed on the horizontal plane G and an image is projected onto the wall surface H, the projection distance of the image is uniquely determined.

FIG. 4 is a cross-sectional view showing an internal configuration of the projection unit 30 provided in the projector 2 according to this embodiment. Here, the projection unit 30 is an oblique projection system unit including the projection lens group 35 and the mirror 36. 4 is a cross-sectional view as seen from the front of the projection unit 30, that is, from the front side of the housing 4 of the projector 2. As shown in FIG. Projection light emitted from the LED 31 serving as a light source that emits projection light is converted into parallel light by the condenser lens group 32 and then enters a PBS (polarization beam splitter) 33, and 45 in the traveling direction of the incident light. The polarized light separation film 33a provided at an angle of ° is irradiated. Of the irradiated projection light, only the S-polarized light is reflected by the polarization separation film 33a and emitted downward from the lower surface of the PBS 33, and then is a normally black type as an image display unit installed below the PBS 33. It enters an LCOS (reflection type liquid crystal element) 34. On the other hand, the P-polarized light transmitted through the polarization separation film 33a is incident on and absorbed by the side surface of the PBS 33 that has been subjected to a non-reflective process such as a black process.

The light incident on the LCOS 34 is reflected by the LCOS 34 and is incident on the PBS 33 again. Here, a liquid crystal layer (not shown) constituting the LCOS 34 functions as a phase plate for incident light when a voltage is applied. Therefore, of the light emitted from the LCOS 34, the light transmitted through the pixel region to which a voltage is applied by the liquid crystal layer is converted from S-polarized light to P-polarized light. On the other hand, of the light emitted from the LCOS 34, the light transmitted through the pixel region to which no voltage is applied by the liquid crystal layer proceeds as S-polarized light.

Of the light emitted from the LCOS 34 and incident on the PBS 33 again, only the P-polarized light that has passed through the pixel region to which the voltage of the LCOS 34 has been applied passes through the polarization separation film 33a and is separated from the S-polarized light. The P-polarized light is emitted upward from the PBS 33, and then a projection lens group 35 for projecting a projection optical image, and a mirror for deflecting the projection direction of the optical image emitted from the projection lens group 35. The light is emitted from the projection unit 30 through 36 and projected through the projection window 8 provided on the front surface 6 of the housing 4 of the projector 2.

Here, the mirror 36 is composed of a curved mirror having a predetermined curvature so that the trapezoidal correction can be performed on the projection image P projected on the projection plane. Further, all optical members constituting the projection optical system in the projection unit 30 are fixed to the projection unit 30. As described above, in the projector 2 according to this embodiment, when the projector 2 is installed on the horizontal plane G, the projection distance of the image is uniquely determined. Therefore, a clear projection image is obtained at a position separated by the projection distance. The optical member in the projection unit 30 can be fixed in advance at a predetermined position.

Next, the projection image size enlargement / reduction processing by the projection apparatus according to this embodiment will be described with reference to FIG. FIG. 5 is a diagram showing a state when the enlargement / reduction process is being performed on the image projected by the projector 2. As shown in FIG. 5, when the projection image P projected on the projection plane G is enlarged or reduced, one side closest to the housing 4 of the projection image P is fixed. By performing the enlargement / reduction of the image in this way, the required projection area of the image can be minimized. That is, according to the projector 2, since an image is often projected onto a surface having a relatively small projection area such as a desk surface, the projection image P is enlarged and reduced in this way, so It is possible to prevent the image projection area from being enlarged. In addition, since the user can easily recognize the position serving as a reference for enlargement / reduction, the user can easily handle the position.

Here, the enlargement / reduction of the projection image P is performed while maintaining the aspect ratio of the image displayed on the LCOS 34 of the projection unit 30 in a state where one side corresponding to the one side of the projection image P is fixed. Is done by doing. Since all the optical members accommodated in the projection unit 30 are fixed with respect to the projection unit 30, the projection image P is enlarged or reduced by such electrical control.

Note that the projector 2 according to the embodiment of the present invention may include another projection unit 40 shown in FIG. 6 instead of the projection unit 30. The projection unit 40 includes a transmissive liquid crystal display as an image display unit in the unit, but has the same configuration as the projection unit 30 except for this point. Therefore, in the description of the projection unit 40, the description of the same configuration as the projection unit 30 is omitted. In the description of the projection unit 40, the same components as those of the projection unit 30 are denoted by the same reference numerals.

FIG. 6 is a cross-sectional view showing an internal configuration of the projection unit 40. FIG. 6 is a cross-sectional view of the projection unit 40 when viewed in the lateral direction, that is, from the side surface side of the casing 4 of the projector 2. As shown in FIG. 6, the unit 40 having a rectangular cross section includes an LED 31, a condenser lens group 32, a first polarizing plate 41 that transmits only the P-polarized component of the projection light, and an LCD as an image display element. A (transmissive liquid crystal display) 42, a second polarizing plate 43 that transmits only the S-polarized component of the projection light, a projection lens group 35, and a mirror 36 are disposed.

The non-polarized projection light emitted from the LED 31 and converted into parallel light by the condenser lens group 32 is converted into P-polarized linearly polarized light by the first polarizing plate 41 and then enters the LCD 42. Here, in the pixel area constituting the LCD 42, light transmitted through the pixel area to which no voltage is applied is converted from P-polarized light to S-polarized light. On the other hand, the light transmitted through the pixel area to which the voltage is applied does not change in the polarization characteristics and is emitted as P-polarized light. In the projection light emitted from the LCD 42 as mixed light of P-polarized light and S-polarized light, only the S-polarized light passes through the second polarizing plate 43 and enters the projection lens group 35. The projection light emitted from the projection lens group 35 is reflected by a mirror 36 composed of a curved mirror, the projection direction is deflected, and the trapezoidal correction of the projection image is performed and projected from the projection window 44 of the projection unit 40. Is done.

Note that, similarly to the projection unit 30 described above, all the optical members that constitute the projection optical system in the projection unit 40 are also fixed to the projection unit 40. As described above, in the projector 2 according to this embodiment, when the projector 2 is installed on the horizontal plane G, the projection distance of the image is uniquely determined. Therefore, a clear projection image is obtained at a position separated by the projection distance. The optical member in the projection unit 40 can be fixed at a predetermined position in advance.

According to the projection device according to the first embodiment, the distance from the projection window provided in the housing to the projection surface for projecting the image is unambiguous by installing on the horizontal plane using the installation surface provided in the housing. Therefore, all the optical members of the optical system provided in the projection unit can be fixedly arranged with respect to the projection unit. Therefore, it is not necessary to provide a focus adjustment mechanism or the like, and it is possible to simplify the projection unit, and thus the mechanism of the projection apparatus, to achieve weight reduction, size reduction, cost reduction, and the like. In addition, since there are no moving parts, the accuracy of the projection optical system can be prevented and reliability can be improved, and a clear image can be projected without performing operations such as focus adjustment when the apparatus is used. Therefore, the operability is greatly improved.

In addition, according to the projection apparatus according to the first embodiment, the projection unit performs an enlargement / reduction process on the projected image by fixing one side close to the casing of the projection apparatus. Can be easily changed, and the required image projection area can be minimized.

As described above, according to the projection apparatus according to the first embodiment, it is possible to project an image with an easy operation without requiring various adjustments.

Next, a projection apparatus according to a second embodiment of the present invention will be described with reference to the drawings. FIG. 7 is a block diagram showing a schematic configuration of a projector 50 as a projection apparatus according to the second embodiment, and FIG. 8 is a perspective view showing a state when an image is projected by the projector 50. is there. As shown in FIG. 7, the projector 50 includes a control unit 51 that comprehensively controls the functions of each unit, a projection unit 52 having the same configuration as the projection unit 30 included in the projector 2, and the projector 50. An image pickup unit 53 that picks up light incident through an image pickup window 62 (see FIG. 8) provided in front of the housing 61 is provided. In addition, the projector 50 includes a projection area determination unit 54 that determines a projection area on which an image is projected based on an image captured by the imaging unit 53.

As shown in FIG. 8, the imaging unit 53 images the front area F including the projection area of the projection image projected by the projection unit 52 from the imaging window 62 provided on the front surface of the housing 61. The projection area determination unit 54 determines a projection area to project an image based on the captured image. For example, as shown in FIG. 8, when the projector 50 is installed on the surface of a desk and the projection area is limited by the shape (edge) of the desk, the projection area determination unit 54 includes a housing 61. Based on the captured image obtained by capturing the front area F, the projection area is determined so that the projection area of the projection image P does not deviate from the surface of the desk.

When the projection area is determined, the control unit 51 transmits a control signal to the projection unit 52 to instruct to project the projection image P so as to be within the projection area. That is, the projection unit 52 displays an image displayed on the LCOS 34 with an appropriate size, and electrically controls the image size so as to be within the projection area. Note that the image size determination process as described above may be performed before the projection image P is projected, or at the same time as the projection of the projection image P, that is, as indicated by a dotted line in FIG. You may perform the process which changes the size of the projection image P initially projected into the size after correction shown by a solid line.

According to the projection apparatus according to the second embodiment, a projection area in which an image can be projected by the projection unit using the imaging unit that images the projection surface and the captured image of the projection surface captured by the imaging unit. An image optimized for a projection surface with a limited projection area, such as a desk surface, because the projection unit projects an image within the determined projection area. Projection images can be projected in size.

Next, a projection apparatus according to a third embodiment of the invention will be described with reference to the drawings. FIG. 9 is a perspective view showing a first state when an image is projected by the projector 70 as the projection apparatus according to the third embodiment. As shown in FIG. 9, the projector 70 includes a housing 71 made of metal or plastic, and an upper surface 72 provided with an operation unit and the like for setting a power switch and various functions on the upper portion of the housing 71. And a cover 73 provided so as to be openable and closable upward. When the projector 70 is used, the cover 73 is opened by rotating it by a predetermined angle around the rotation shaft 74 automatically or manually, and the mirror 75 installed on the lower side of the cover 73 is exposed. The angle is a predetermined angle and is not changed. When the cover 73 is opened, the projection window 77 provided at the center of the second upper surface 76 of the housing 71 is exposed. The projector 70 has a projection unit (not shown) inside the casing 71, and the projection image P projected from the projection unit is reflected by the mirror 75 after passing through the projection window 77, and the casing 71 is installed. Projected onto the horizontal plane G.

The projector 70 is installed on the horizontal plane G so that the lower surface, which is the surface facing the upper surface 72 of the casing 71, is in contact with the horizontal plane G. Here, the lower surface functions as an installation surface used when installing the casing 71, and defines a distance from the projection window 77 of the casing 71 to the horizontal plane G that is the projection plane of the projection image P. Also functions as a reference plane. That is, when the casing 71 is installed on the horizontal plane G with the lower surface down, the distance from the projection window 77 of the casing 71 to the horizontal plane G is uniquely determined. At this time, the lower surface of the casing 71 as the distance reference plane and the horizontal plane G as the projection plane on which the projection image P is projected are parallel to each other. In this way, the projection distance of the image by the projector 70 is uniquely determined, so that the optical member of the above-described projection unit housed in the casing 71 is projected clearly at a position separated by the projection distance. In order to form an image, the projection unit is fixed in advance at a predetermined position.

FIG. 10 is a perspective view showing a second state when an image is projected by the projector 70 as the projection apparatus according to this embodiment. As shown in FIG. 10, the projector 70 is installed such that the rear surface of the casing 71 is in contact with the horizontal plane G and the lower surface is in contact with the wall surface H that is a plane perpendicular to the horizontal plane G. Further, the projection image P projected from the projection window 77 provided on the casing 71 is reflected on the wall surface H after being reflected by a mirror 75 (not shown in FIG. 10) provided on the cover 73 of the casing 71. ing.

Here, the rear surface of the casing 71 functions as an installation surface used when the casing 71 is installed, and the lower surface extends from the projection window 77 of the casing 71 to the wall surface H that is the projection plane of the image. It functions as a distance reference plane that defines the distance. That is, the casing 71 is installed on the horizontal plane G with the rear surface facing down, and the bottom surface is installed in contact with the wall surface H, so that the projection window 77 provided on the casing 71 extends from the wall surface H to the wall surface H. The distance is uniquely determined. At this time, the lower surface of the casing 71 as a distance reference plane and the wall surface H as a projection plane on which an image is projected are parallel to each other. Thus, also when the housing 71 is installed on the horizontal plane G and an image is projected onto the wall surface H, the projection distance of the image is uniquely determined.

The projection apparatus according to the third embodiment can project an image with an easy operation without requiring various adjustments.

The projection unit according to each of the above-described embodiments includes a mirror 36 that is formed of a curved mirror having a predetermined curvature and has a concave reflecting surface as shown in FIG. Instead of the mirror 36, a mirror having a concave-shaped reflecting surface may be provided.

Further, in place of the mirror 36, a mirror 80 which is constituted by a free-form surface mirror and has a convex reflecting surface as shown in FIG. 11 may be provided. When this convex mirror 80 is provided, it is not necessary to provide an intermediate image forming mechanism or the like as compared with the case where the concave mirror 36 that is required to form an intermediate image is provided, and the projection unit, and thus the projection device. Can be reduced in weight, reduced in size, and reduced in cost.

Further, at least one surface of the optical member constituting the projection optical system in the projection unit may be constituted by a free-form surface. In this case, since all the optical members constituting the projection optical system in the projection unit are fixed with respect to the projection unit, it is possible to prevent a decrease in accuracy of the optical member having a free-form surface and to easily distort the optical member. It is possible to form a projection image without any image.

Next, a projection apparatus according to a fourth embodiment of the invention will be described with reference to the drawings. FIG. 12 is a perspective view showing an external appearance at the time of image projection of the projector 200 as the projection apparatus according to the fourth embodiment. As shown in FIG. 12, the projector 200 projects a projection image P on the projection plane A in a state where the projector 200 is installed upright on the projection plane A. The projector 200 includes a housing 400 in which a projection unit 500 (see FIG. 14) is accommodated. A projection window 800 is provided on the front surface 600 of the casing 400, and an image projected from the projection unit 500 is projected from the projection window 800 toward the front of the casing 400, and is projected onto the projection plane A. P is imaged. Further, on the upper surface 100 of the housing 400, an operation unit for performing function setting of the projector 200 and the like is provided. In the projector 200 according to this embodiment, the lower surface 120 of the housing 400 functions as an installation surface in contact with the projection surface A.

As shown in FIG. 12, the projector 200 includes a cover 140 that functions as a protective member for protecting the projection window 800 on the front surface 600 of the housing 400. The cover 140 is installed so as to be slidable in the vertical direction via a pair of

slide rails

160, 160 disposed near both ends in the width direction of the front surface 600 of the housing 400. As shown in FIG. 12, when an image is projected by the projector 200, the cover 140 is slid to the lowermost position of the front surface 600 of the housing 400, and is disposed at the projection position where the projection window 800 is exposed. The lower end surface of 140 is brought into contact with the projection surface A. By disposing the cover 140 at such a position, the housing 400 installed on the projection plane A can be supplementarily supported using the cover 140.

FIG. 13 is a perspective view showing the external appearance of the projector 200 according to this embodiment when the image is not projected. As shown in FIG. 13, the cover 140 attached to the front surface 600 of the housing 400 is in a state where it slides to the top on the front surface 600 and completely blocks the projection window 800 installed on the front surface 600. It is located in the storage position to protect. By protecting the projection window in this way, the user of the projector 200 can carry the projector 200 with peace of mind.

FIG. 14 is a front sectional view showing an internal configuration of the housing 400 of the projector 200 according to this embodiment. Note that the projection unit 500 housed in the housing 400 is also shown by a cross-sectional view. As shown in FIG. 14, the projection unit 500 includes a unit case 510 fixed to the case 400. Inside the unit case 510, an LED 512, a condenser lens group 514, PBS ( A polarizing beam splitter (516), a normally black type LCOS (reflection type liquid crystal element) 518, a projection lens group 530, and a mirror 532 are arranged.

The projection light emitted from the LED 512 is converted into parallel light by the condenser lens group 514 and then enters the PBS 516, and then enters the polarization separation film 516a provided at an angle of 45 ° with respect to the traveling direction of the incident light. . Of the incident projection light, only the S-polarized light is reflected by the polarization separation film 516a and emitted downward from the lower surface of the PBS 516, and then enters the LCOS 518 serving as an image display unit installed under the PBS 516. On the other hand, the P-polarized light transmitted through the polarization separation film 516a is incident on and absorbed by the side surface of the PBS 516 that has been subjected to non-reflective processing such as black processing.

The light incident on the LCOS 518 is reflected by the LCOS 518 and is incident on the PBS 516 again. Here, a liquid crystal layer (not shown) constituting the LCOS 518 functions as a phase plate for incident light when a voltage is applied. Therefore, of the light emitted from the LCOS 518, the light transmitted through the pixel region to which a voltage is applied by the liquid crystal layer is converted from S-polarized light to P-polarized light. On the other hand, of the light emitted from the LCOS 518, the light transmitted through the pixel region to which no voltage is applied by the liquid crystal layer proceeds as S-polarized light.

Of the light emitted from the LCOS 518 and re-entering the PBS 516, only the P-polarized light that has passed through the pixel region to which the voltage of the LCOS 518 is applied passes through the polarization separation film 516a and is separated from the S-polarized light. After the P-polarized light is emitted upward from the PBS 516, the P-polarized light passes through the projection lens group 530 for projecting the projection optical image, and is reflected by the mirror 532 for deflecting the projection direction of the optical image. The light is emitted from the projection unit 500 and projected from the projection window 800 provided in front of the housing 400 of the projector 200 to the front of the projector 200. The mirror 532 is a curved mirror having a predetermined curvature so that trapezoidal correction can be performed on the projection image P formed on the projection plane A.

Further, as shown in FIG. 14, a power source 534 that supplies power to the LEDs 512 and the like in the unit casing 510 is provided below the casing 400. When a heavy object such as the power supply 534 is disposed below the housing 400, the position of the center of gravity of the projector 200 moves downward, so that the projector 200 at the time of installation can be made more stable. Further, by arranging the power source 534 inside the housing 400, the center of gravity moved to the front of the projector 200 due to the provision of the cover 140 on the front surface 600 of the housing 400 is moved from the center of the housing 400. Thus, a vertical line extending downward from the center of gravity can pass through the installation surface (lower surface 120) of the housing 400. By moving the center of gravity of the projector 200 in this way, the projector 200 can be stably installed.

According to the projector 200 according to the fourth embodiment, the cover 140 is provided on the front surface 600 of the housing 400 so as to be slidable in the vertical direction. When the casing 400 is installed, the cover 140 can be moved to the lowest position so that the lower end surface of the cover 140 can be brought into contact with the projection plane A. By using the cover 140 in this manner and supporting the housing 400 in an auxiliary manner, the projector 200 can be installed more stably. Further, according to projector 200 according to the present embodiment, since a heavy object such as power supply 534 is arranged inside casing 400, the position of the center of gravity of projector 200 moves downward, and from the center of gravity below. A vertical line extending to the inside passes through the installation surface of the housing 400. Therefore, the projector 200 can be stably installed on the projection plane A.

Next, a projector 102 as a projection apparatus according to the fifth embodiment of the invention will be described with reference to FIGS. 15 and 16. The projector 102 includes a cover having a shape different from that of the cover 140 included in the projector 200 according to the fourth embodiment. Except for this point, the projector 102 includes a configuration similar to the configuration included in the projector 200 described above. ing. Therefore, in the description of the projector 102, the description of the same configuration as the projector 200 is omitted, and the same reference numerals are used.

FIG. 15 is a perspective view showing an external appearance of the projector 102 when the image is not projected. As shown in FIG. 15, the projector 102 has a housing 104 including a projection unit 500 inside. The housing 104 includes a rotating shaft portion 113 below the left and right side surfaces. A cover 114 serving as a protective member for protecting the front surface of the housing 104 is rotatable on the rotating shaft portion 113. is set up. As shown in FIG. 15, when the image is not projected, the cover 114 is located at a storage position that completely closes the front surface 106 (see FIG. 16) of the housing 104, and is provided on the front surface 106 or the front surface 106. The projection window 800 (see FIG. 16) is protected.

On the other hand, as shown in FIG. 16, which is a perspective view showing the appearance of the projector 102 when an image is projected, when the projector 102 projects an image, the cover 114 located at the storage position is attached to the rotary shaft 113. It is rotated about 270 ° about the center and placed at the projection position shown in FIG. When the cover 114 is disposed at the projection position, the projection window 800 provided on the front surface 106 of the housing 104 is exposed, so that an image can be projected toward the front of the projector 102. Further, when the casing 104 is placed on the projection plane A with the cover 114 placed at the projection position, the cover 114 comes into contact with the projection plane A, so that the casing 104 placed on the projection plane A is auxiliary. Can be supported.

According to the projector 102 according to the fifth embodiment, the cover 114 is disposed at the projection position, and the cover 114 is brought into contact with the projection plane A, thereby supporting the housing 104 in an auxiliary manner. It can be installed more stably.

Next, a projector 202 as a projection apparatus according to the sixth embodiment of the invention will be described with reference to FIGS. FIG. 17 is a perspective view illustrating an appearance of the projector 202 when an image is projected. As shown in FIG. 17, a projection window 208 is provided on the front surface 206 of the housing 204 provided in the projector 202 installed on the projection plane A, and the projection image P is projected through the projection window 208 to the projection plane A. Projected on top. Note that an operation unit or the like for performing function settings or the like of the projector 202 is disposed on the back surface of the housing 204. Further, the lower surface 212 of the housing 204 is in contact with the projection surface A as an installation surface. Further, the internal configuration of the housing 204 is the same as the internal configuration of the housing 400 included in the projector 200 according to the fourth embodiment, and the projection unit 500 and the power source 534 are accommodated.

As shown in FIG. 17, the projector 202 includes a cover 214 supported by a pair of support arms 216 arranged on the left and right side surfaces of the housing 204. The support arm 216 is rotatably installed on the side surface of the housing 204 via a rotation shaft 218 inserted through one end. A cover support portion 220 that supports the cover 214 is provided at the other end of the support arm 216. The cover 214 includes a weight portion 222 (see FIG. 18) extending in the left-right direction of the cover 214 in the vicinity of the end portion supported by the cover support portion 220. The cover 214 includes a cover mirror 226 that reflects an image projected from the projection window 208 on the inner surface 224 and projects a projection image P onto the projection plane A. When an image is projected by the projector 202, the cover 214 is disposed at a projection position shown in FIG. 17 so that the projection window 208 is exposed and the image projected from the projection window 208 is reflected by the cover mirror 226. When the cover 214 is disposed at the projection position, the portion of the cover 214 on which the cover mirror 226 is installed protrudes to the front of the housing 204. However, as described later, the cover 214 is weighted. Since the portion 222 is provided, the state is stably maintained. Further, the balance of the housing 204 of the projector 202 is not lost.

On the other hand, as shown in FIG. 18 which is a perspective view showing the appearance of the projector 202 when the image is not projected, the cover 214 is a storage position that closes the front face 206 of the housing 204 when the image is not projected. The projection window 208 installed on the front face 206 is protected. Therefore, the user of the projector 202 can carry the projector 202 with peace of mind.

Next, the position of the center of gravity of the cover 214 will be described with reference to FIGS. 19 and 20. The cover 214 includes a cover mirror 226 on the lower side in FIG. 19 and a weight portion 222 on the upper end. Therefore, as shown in FIG. 19, the center of gravity G of the cover 214 is located at a position close to the end side where the weight portion 222 is provided. When the cover 214 is located at the storage position, since the center of gravity G is at the position, a vertical line extending downward from the center of gravity G passes through the lower surface 212 that is the installation surface of the housing 204. Therefore, the housing 204 can stably hold the cover 214 in the storage position.

On the other hand, when the image is projected by the projector 202, as shown in FIG. 20, the cover 214 is rotated around the rotation axis 218 in the clockwise direction in the drawing and is arranged at the projection position. Even in this case, the vertical line extending downward from the center of gravity G of the cover 214 passes through the lower surface 212 of the housing 204. Therefore, the housing 204 can stably hold the cover 214 at the projection position.

According to the projector 202 according to the sixth embodiment, the cover 214 supported by the support arm 216 installed in the housing 204 is provided, and the cover mirror 226 is provided on the inner surface 224 of the cover 214. Therefore, an image transmitted through the projection window 208 can be reflected by the cover mirror 226, and a good projection image can be projected on the projection plane A. Further, according to the projector 202 according to this embodiment, since the cover 214 includes the weight portion 222 at one end portion, a vertical line extending downward from the center of gravity G of the cover 214 disposed at the projection position is provided. It passes through the lower surface 212 of the body 204. Therefore, the housing 204 can be installed on the projection plane A in a state where the cover 214 is stably held at the projection position.

Next, a projector 302 as a projection apparatus according to a seventh embodiment of the invention will be described with reference to FIG. The projector 302 has the same configuration as that of the projector 200 according to the fourth embodiment, but an attachment member that supports the housing 304 is attached to the housing 304 of the projector 302. Is different in that it is. Except for this point, the projector 302 has the same configuration as that of the projector 200 described above. Therefore, in the description of the projector 302, the description of the same configuration as the projector 200 is omitted and the same. The code is used.

FIG. 21 is a perspective view showing an appearance of the projector 302 when an image is projected. As shown in FIG. 21, the housing 304 provided in the projector 302 installed on the projection plane A is supported by the cover 140 that has moved to the lowest position on the front surface of the housing 304. Further, a connector mounting portion (not shown) is provided on one side surface of the housing 304, and a connector 306 to which a power cable and a data transfer cable are connected is mounted. The connector 306 has, for example, a shape that becomes wider toward the lower surface in contact with the projection surface A so that the housing 304 installed on the projection surface A can be supplementarily supported. Therefore, according to the projector 302 according to this embodiment, even when the weight balance of the housing 304 changes due to the attachment of a power cable or the like, the connector 306 having such a shape is attached to the housing 302. By supporting 304 in an auxiliary manner, the housing 304 can be stably installed on the projection plane A. Note that a suction cup or the like may be provided on the lower surface of the connector 306 to fix the connector 306 on the projection plane A in order to more securely support the housing 304 with the connector 306.

2, 50, 70 ... projector, 4, 61, 71 ... housing, 8, 77 ... projection window, 30, 40 ... projection unit, 62 ... imaging window, 75 ... mirror, F ... front area, G ... horizontal plane, H ... wall, P ... projected image

Claims

A projection unit comprising an optical system for projecting an image;
A housing that houses the projection unit;
Provided in the casing that functions as a distance reference plane that defines a distance from a projection window provided in the casing to a projection plane that projects the image, and a first installation plane that is used when the casing is installed. The first aspect;
A projection apparatus comprising: a second surface provided on the housing that is orthogonal to the first surface and functions as a second installation surface used when the housing is installed.
A projection unit comprising an optical system for projecting an image;
A housing for housing the projection unit,
The projection unit is
A projection apparatus, wherein an enlargement / reduction process is performed on an image projected on a projection plane on which the image is projected, with one side close to the housing fixed.
3. The projection apparatus according to claim 2, wherein the enlargement / reduction processing is performed by processing an image signal.
An imaging unit for imaging the projection plane;
A projection region determining unit that determines a projection region in which the projection unit can project the image using the captured image of the projection surface captured by the imaging unit;
The projection unit is
The projection apparatus according to claim 2, wherein the image is projected into the projection area.
The housing is
Provided in the casing that functions as a distance reference plane that defines a distance from a projection window provided in the casing to a projection plane that projects the image, and a first installation plane that is used when the casing is installed. The first aspect;
The second surface provided on the housing, which is orthogonal to the first surface and functions as a second installation surface used when the housing is installed. 5. The projection device according to any one of 4.
The optical member constituting the optical system is
6. The projection apparatus according to claim 1, wherein all of the projection units are fixed in a state where the image is projected.
The housing is
7. The projection apparatus according to claim 1, wherein the projection apparatus is installed so that the distance reference plane and the projection plane are parallel when the image is projected.
The projection unit has an optical system of an oblique projection system including a projection lens and a mirror,
The projection apparatus according to any one of claims 1 to 7, wherein at least one surface of the optical member constituting the optical system is a free-form surface.
The projection apparatus according to any one of claims 1 to 7, wherein a reflecting surface of a mirror constituting the optical system is a convex surface and a free-form surface.