JP2017207688A - projector - Google Patents

Abstract

To provide a projector that allows a user to observe an image in an environment having a more open feeling.
A projector includes a light source and a main body portion that includes a light modulation device that modulates light emitted from the light source, and a projection optical device that projects from the main body portion and projects light emitted from the main body portion. And comprising. The projection optical apparatus 1B includes a plurality of lenses and a lens housing 5 that houses the plurality of lenses. The lens housing 5 intersects the optical axis of the light emitted from the main body 1A (first direction ( In the Z direction), the third storage portion 53 is spaced apart from the main body portion 1A, and the third storage portion 53 stores the exit side lens 431 arranged on the most light exit side among the plurality of lenses.
[Selection] Figure 2

Description

  The present invention relates to a projector.

  2. Description of the Related Art Conventionally, a projector including a light source, a light modulation device that modulates light emitted from the light source according to image information, and a projection optical device that projects light modulated by the light modulation device onto a projection surface is known. It has been. In addition, there has been proposed a projector configured to install a projector on a ceiling or the like of a hall or a conference room using an apparatus that supports the projector and project an image on a projection surface in the hall or the conference room ( For example, see Patent Document 1).

  In the projector described in Patent Document 1, a plurality of protrusions having L-shaped insertion recesses are arranged in parallel on the bottom surface of the housing. In the projector, the plate-like portion of the fixing bracket is inserted into the insertion recess, supported by the fixing bracket, and suspended from the ceiling via the fixing bracket. And a projector projects an image on the projection surface arrange | positioned under the ceiling.

JP 2008-286873 A

  However, the projector described in Patent Document 1 gives a feeling of pressure to a user who observes an image in a hall or a conference room where the projection surface is arranged in a state where the projector is suspended from the ceiling, and impairs the aesthetics of the room. There is a fear. In particular, in a projector that increases in size for projecting a high-brightness or high-resolution image, the loss of pressure and aesthetics become significant.

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

  Application Example 1 A projector according to this application example is a projector that projects an image on a projection surface, and includes a main body unit including a light source and a light modulation device that modulates light emitted from the light source, and the main body unit. A projection optical device that projects light emitted from the main body, and the projection optical device includes a plurality of lenses and a lens housing that houses the plurality of lenses. The body has a separation portion that is separated from the main body portion in a first direction intersecting the optical axis of the light emitted from the main body portion, and the separation portion is located closest to the light emission side among the plurality of lenses. The exit side lens to be arranged is housed.

  According to this configuration, in the projection optical apparatus, the separation portion that houses the exit side lens is disposed away from the main body portion. Accordingly, the partition member is disposed between the main body portion and the separation portion, the projector is installed, and an image can be projected from the exit side lens onto the projection surface. For example, by using a ceiling or an indoor wall, or a plate-like member arranged in parallel to the ceiling or wall as a partition member, the separation portion is arranged in one space (first space) partitioned by the partition member. The main body can be arranged in the other space (second space, ceiling, inside wall, etc.). That is, the projector can project an image without allowing the user who observes the image in the first space where the projection surface is arranged to visually recognize the main body. Therefore, it is possible to provide a projector that gives a feeling of pressure to the user and that can be installed with reduced loss of aesthetics in the room (first space) and allows the user to observe images in a more open environment. . In particular, the present invention has a remarkable effect in a projector that increases in size for projecting an image with high brightness or high resolution.

  Application Example 2 In the projector according to the application example described above, the projection optical device includes a first optical system that refracts light emitted from the main body, and the light emitted from the first optical system. A first reflecting portion that reflects toward the direction side, and a second reflecting portion that reflects the light traveling toward the first direction side toward the second direction side opposite to the direction of the light emitted from the main body portion. A second optical system, and a third optical system that includes the exit-side lens and refracts the light emitted from the second optical system, and the separation unit houses the third optical system. preferable.

According to this configuration, since the projection optical apparatus includes the above-described optical system, the projection surface is arranged on the side opposite to the direction of the light emitted from the main body unit by bending the light emitted from the main body unit. It is possible to project an enlarged image. In addition, by arranging a partition member between the main body and the separation portion, it is possible to project an image without allowing the user to visually recognize a part of the main body and the projection optical device.
Therefore, it is possible to provide a projector that gives a feeling of pressure to the user and that is installed with reduced loss of aesthetics in the room (first space) and projects an image on the side opposite to the direction of light emitted from the main body. Become.

  Application Example 3 In the projector according to the application example described above, the projection optical apparatus includes a first optical system that refracts light emitted from the main body, and light emitted from the first optical system. It is preferable to include a reflecting portion that reflects to the direction side and a second optical system that includes the exit-side lens and refracts light reflected by the reflecting portion.

According to this configuration, since the projection optical apparatus includes the above-described optical system, the projection surface is arranged in a direction that bends the light emitted from the main body and intersects the direction of the light emitted from the main body. It is possible to project an enlarged image. In addition, by arranging a partition member between the main body and the separation portion, it is possible to project an image without allowing the user to visually recognize a part of the main body and the projection optical device.
Therefore, it is possible to provide a projector that gives a feeling of pressure to the user and projects an image on the direction side that intersects the direction of the light emitted from the main unit while suppressing loss of aesthetics in the room (first space). It becomes.

  Application Example 4 In the projector according to the application example described above, the projection optical device includes a lens group including the exit side lens, and the lens group is a wide angle lens group that widens and emits incident light. Preferably there is.

  According to this configuration, it is possible to provide a projector that performs enlarged projection from a position close to the projection surface. Accordingly, it is possible to configure a projector that is disposed at a position closer to the projection plane than the user who observes the image. Therefore, even if the user cannot easily recognize the position of the projector by not viewing the main body and the projection optical device by the user, for example, the user may intrude between the projector and the projection surface. It is possible to avoid the light from being blocked. Therefore, it is possible to provide a projector that increases the degree of freedom of the position where the user observes the image.

  Application Example 5 In the projector according to the application example described above, the projector is disposed in the separation unit and outputs a signal corresponding to received light, and the operation of the projector according to the output of the light receiving unit. It is preferable to include a control unit that controls

  According to this configuration, when the projector is installed using the partition member such that the separating portion is disposed in the first space and the main body portion is disposed in the second space, the light receiving portion is disposed in the first space. Be placed. That is, even when the projector is installed such that the main body is hidden by the partition member, the light detection by the light receiving unit, for example, receiving a light signal by a user's remote control operation, Brightness can be detected. Since the projector includes the above-described control unit, for example, an operation according to a user's remote control operation, an image projection according to the brightness of the first space, and the like can be performed. Therefore, it is possible to provide a projector that is installed while suppressing the user's feeling of pressure and has improved usability and image visibility.

FIG. 3 is a schematic diagram for explaining a main configuration of the projector according to the first embodiment. FIG. 3 is a schematic diagram illustrating an example of another usage pattern of the projector according to the first embodiment. The schematic diagram which shows the main structures of the main-body part of 1st Embodiment. The schematic diagram for demonstrating the main structures of the projector of 2nd Embodiment.

(First embodiment)
Hereinafter, the projector according to the present embodiment will be described with reference to the drawings.
The projector according to the present embodiment modulates light emitted from a light source according to image information, and enlarges and projects the modulated light onto a projection surface such as a screen. In addition, the projector according to the present embodiment is configured to be able to be placed on a desk or the like, or installed on a ceiling or a wall through a support tool.

[Main components of the projector]
FIG. 1 is a schematic diagram for explaining a main configuration of a projector 1 according to the present embodiment. FIG. 1 is a schematic diagram illustrating an example of a usage pattern of the projector 1, and is a diagram illustrating a state (stationary state) placed on a desktop Ta. FIG. 2 is a schematic diagram illustrating an example of another usage pattern of the projector 1, and is a diagram illustrating a state where the projector 1 is installed on the ceiling Ce via the support Mt (a ceiling suspended state).
As shown in FIG. 1, the projector 1 includes a main body 1A having an optical unit 3 and a projection optical device 1B protruding from the main body 1A.

As will be described in detail later, the main unit 1A includes a light source 311 and a light modulation device 351 and the like, modulates light emitted from the light source 311 according to image information, and emits the light to the projection optical device 1B.
As will be described in detail later, the projection optical apparatus 1B includes a plurality of lenses, and projects the light collected from the main body 1A onto a projection surface Sc (see FIG. 2) such as a screen.

  As shown in FIG. 2, the projector 1 assumes a posture (ceiling suspension posture) in which the top and bottom are inverted from the posture in the stationary state (stationary posture) in the ceiling suspension state. The projector 1 is configured to be able to hide a part of the main body 1A and the projection optical apparatus 1B by using a plate-like partition member Pa provided in parallel with the ceiling Ce in the ceiling-suspended state. ing. For convenience of explanation, the direction of light emitted from the main body 1A is + X direction (front), orthogonal to the X direction, and in the ceiling-suspended projector 1, the upper direction in the vertical direction is + Z direction and faces the projection surface Sc. The right side of the projector 1 viewed from the side to be performed is described as the + Y direction.

[Configuration of the main unit]
FIG. 3 is a schematic diagram showing a main configuration of the main body 1A.
As shown in FIG. 3, the main unit 1A includes an exterior housing 2, a control unit 6 housed in the exterior housing 2, an optical unit 3, and a remote control light receiving unit 7 disposed in the projection optical apparatus 1B. Yes. Although not shown, the main body 1A includes a power supply device that supplies power to the light source device 31 and the control unit 6 of the optical unit 3, and a cooling device that cools the optical unit 3 and the power supply device.

  The exterior housing 2 is configured by combining a plurality of synthetic resin members. As shown in FIGS. 1 and 2, the front surface portion 2F forming the front side (+ X side), the rear side (−X side). The back surface portion 2B that forms the upper surface portion 2U, the upper surface portion 2U that forms the upper side (+ Z side) and the lower side (−Z side), the lower surface portion 2D, and the like in the ceiling suspension posture.

  As shown in FIG. 1, the front surface portion 2 </ b> F is provided with a recess portion 21. A through hole (not shown) penetrating in the front-rear direction is formed in the hollow portion 21 at substantially the center in the vertical direction. In the projection optical apparatus 1B, a part (a part of a second storage part 52 described later) is inserted into the hollow part 21, and a part (a cylindrical part 511 of the first storage part 51 described later, see FIG. 1) is a through hole. Is inserted into the main body 1A.

  The upper surface portion 2U abuts on a desk or the like in a stationary state (see FIG. 1) and a leg portion 2Uf that supports the projector 1, and a coupling portion (in the drawing) to which the support tool Mt is coupled in a suspended state (see FIG. 2). (Omitted) is provided. Although not shown, the exterior housing 2 is provided with an intake port for taking in outside air, an exhaust port for exhausting warm air inside the exterior housing 2 to the outside, and the like.

  The control unit 6 includes a central processing unit (CPU), a read only memory (ROM), a random access memory (RAM), and the like, and functions as a computer. The control unit 6 controls the operation of the projector 1, for example, projects an image. Perform related control.

The optical unit 3 optically processes the light emitted from the light source device 31 under the control of the control unit 6 and emits the light to the projection optical device 1B.
As shown in FIG. 3, in addition to the light source device 31, the optical unit 3 places the integrator illumination optical system 32, the color separation optical system 33, the relay optical system 34, the optical device 35, and these optical components at predetermined positions on the optical path. An optical component casing 37 is provided.

  The light source device 31 includes a discharge-type light source 311 composed of an ultrahigh pressure mercury lamp, a metal halide lamp, and the like, a reflector 312 and the like. The light source device 31 reflects the light emitted from the light source 311 by the reflector 312 and emits the light toward the integrator illumination optical system 32.

The integrator illumination optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324.
The first lens array 321 has a configuration in which small lenses are arranged in a matrix, and divides the light emitted from the light source device 31 into a plurality of partial lights. The second lens array 322 has substantially the same configuration as the first lens array 321, and partially superimposes the partial light on the surface of the light modulation device 351 together with the superimposing lens 324. The polarization conversion element 323 has a function of aligning random light emitted from the second lens array 322 into substantially one type of polarized light that can be used in the light modulation device.

  The color separation optical system 33 includes two dichroic mirrors 331 and 332, and a reflection mirror 333. The light emitted from the integrator illumination optical system 32 is red light (hereinafter referred to as “R light”), green light (hereinafter referred to as “light”). G light ”) and blue light (hereinafter referred to as“ B light ”).

  The relay optical system 34 includes an incident side lens 341, a relay lens 343, and reflection mirrors 342 and 344, and has a function of guiding the R light separated by the color separation optical system 33 to an R light light modulation device 351. The optical unit 3 has a configuration in which the relay optical system 34 guides the R light. However, the configuration is not limited thereto, and may be configured to guide the B light, for example.

The optical device 35 is a light modulation device 351 provided for each color light (the light modulation device for R light is 351R, the light modulation device for G light is 351G, and the light modulation device for B light is 351B), And a cross dichroic prism 352 as a color synthesizing optical device.
The light modulation device 351 includes a transmissive liquid crystal panel, an incident-side polarizing plate disposed on the light incident side of the liquid crystal panel, and an emission-side polarizing plate disposed on the light emission side of the liquid crystal panel.
The light modulation device 351 has a rectangular image forming area in which a plurality of micro pixels (not shown) are formed in a matrix. Each pixel is set to a light transmittance corresponding to the image information, and a display image is formed in the image forming area. Each color light is modulated by the light modulator 351 and then emitted to the cross dichroic prism 352.

  The cross dichroic prism 352 has a substantially square shape in plan view in which four right angle prisms are bonded together, and two dielectric multilayer films are formed on the interface where the right angle prisms are bonded together. In the cross dichroic prism 352, the dielectric multilayer film reflects R light and B light modulated by the light modulation devices 351R and 351B, and transmits G light modulated by the light modulation device 351G. Synthesize modulated light.

The remote control light receiving unit 7 corresponds to the light receiving unit, receives a light signal (operation signal by infrared rays) emitted from a remote controller (remote control, not shown) for remotely operating the projector 1, and a signal corresponding to the received light Is output to the control unit 6.
As shown in FIGS. 1 and 2, the remote control light receiving unit 7 is disposed in a lens housing 5 described later of the projection optical apparatus 1B, and is connected to the control unit 6 via a cable (not shown). The control unit 6 controls the operation of the projector 1 according to the output of the remote control light receiving unit 7.

[Configuration of projection optical device]
The projection optical device 1B is configured to be detachable from the main body 1A, and enlarges and projects the light combined by the cross dichroic prism 352 onto the projection surface Sc disposed on the rear side (−X side) of the projector 1.
As shown in FIGS. 1 and 2, the projection optical apparatus 1B includes a first optical system 41, a second optical system 42, a third optical system 43, and a lens housing 5 that houses these optical systems. , Is generally U-shaped.
As shown in FIG. 1, in the projection optical apparatus 1B, the light emitted from the cross dichroic prism 352 enters the first optical system 41, and the third optical system 43 is -Z of the exterior casing 2 (lower surface portion 2D). It arrange | positions so that it may be located in the side.

The first optical system 41 has a plurality of lenses (one lens is shown in FIG. 1), and refracts the light emitted from the cross dichroic prism 352.
The second optical system 42 includes a reflection mirror 421 as a first reflection unit and a reflection mirror 422 as a second reflection unit.
The reflection mirror 421 is disposed in front of the first optical system 41 (+ X side), and reflects the light emitted from the first optical system 41 to the −Z side. The −Z direction is a direction intersecting the optical axis Ax of the light emitted from the main body 1A (in the present embodiment, a direction orthogonal), and corresponds to the first direction.

  The reflection mirror 422 reflects the light traveling to the −Z side to the −X side, which is the opposite side to the light direction (+ X direction) emitted from the main body 1A. The −X direction corresponds to the second direction. Note that the second optical system 42 may have a lens in addition to the reflection mirrors 421 and 422.

  The third optical system 43 has a plurality of lenses (FIG. 1 shows one lens (an emission side lens 431 described later)) and refracts the light emitted from the second optical system 42. The third optical system 43 includes an exit-side lens 431 that is arranged closest to the light exit side among the plurality of lenses. The third optical system 43 includes a wide angle lens group including the exit side lens 431. The wide-angle lens group widens the light emitted from the second optical system 42 and projects the light in the −Z direction with respect to the projection plane Sc (see FIG. 2) orthogonal to the X direction. That is, as shown in FIG. 2, the projection optical apparatus 1 </ b> B has a projection surface Sc disposed below the main body 1 </ b> A (−Z direction) in the vertical direction (Z direction) on the rear side (−X side) of the projector 1. Project an image on. The projection optical device 1B can perform enlarged projection at a position close to the projection surface Sc, and the projector 1 functions as a short focus projector by mounting the projection optical device 1B.

As shown in FIG. 1, the lens housing 5 houses a first housing 51 for housing the first optical system 41, a second housing 52 for housing the second optical system 42, and a third optical system 43. A third storage part 53 is provided.
As shown in FIG. 1, the first storage portion 51 has a cylindrical portion 511 on the light incident side, and the cylindrical portion 511 is inserted from the through hole of the recess portion 21 described above. A plurality of protrusions (not shown) provided intermittently in the circumferential direction are formed on the outer periphery of the cylindrical portion 511. The projection optical apparatus 1B is mounted on the main body 1A with the plurality of protrusions engaging with an attaching / detaching mechanism (not shown) provided on the main body 1A. In addition, the projection optical device 1B can be detached from the main body 1A by operating the attachment / detachment mechanism to release the engagement between the plurality of protrusions and the attachment / detachment mechanism.

As shown in FIG. 1, the second storage portion 52 includes inclined wall portions 521 and 522 that extend along the Z direction and are provided on the opposite sides of the reflecting surfaces of the reflecting mirrors 421 and 422. .
As shown in FIG. 1, the inclined wall portion 521 provided on the outer side of the reflecting mirror 421 is inclined so as to be farther from the first optical system 41 as it is farther from the desktop Ta. As shown in FIG. 1, the inclined wall portion 522 provided outside the reflecting mirror 422 is inclined so as to approach the third optical system 43 as the distance from the desktop Ta increases.

  The inclined wall portion 522 is provided with an opening, and this opening is closed by the filter member 7F. The filter member 7F is a plate-like member that transmits infrared rays and cuts visible light, and the remote control light receiving unit 7 is disposed inside the filter member 7F. That is, the remote control light receiving unit 7 receives an optical signal by infrared rays that is emitted from the remote control and passes through the filter member 7F. In addition, the remote control light receiving unit 7 is arranged so that the central axis of the directional characteristic is obliquely downward (between the + X direction and the −Z direction) in a suspended state (see FIG. 2).

  The third storage portion 53 is provided on the −X side of the reflection mirror 422 and extends along the X direction. Parts of the third storage part 53 and the second storage part 52 that store the reflection mirrors 422 (hereinafter referred to as “front end side storage part 5P”) are arranged apart from the main body part 1A in the Z direction, that is, the first direction. And corresponds to the separation portion. The remote control light receiving unit 7 is disposed in the distal end side storage unit 5P. Here, the front end side storage portion 5P and the main body portion 1A are spaced apart from each other, as shown in FIG. 2, a plate-like partition member Pa can be disposed between the front end side storage portion 5P and the main body portion 1A. It means that they are separated by a certain distance.

As described above, the projection optical device 1B is formed in a substantially U shape, and in the Z direction, the distal end side storage portion 5P is separated from the main body portion 1A and attached to the main body portion 1A.
As shown in FIG. 2, the projector 1 is installed on the ceiling Ce, and in the state where the partition member Pa is disposed between the front end side storage portion 5P and the main body portion 1A, the front end side storage portion 5P is the partition member. Located in the space below Pa (first space 10S), the main body 1A, the first storage portion 51, and a part of the second storage portion 52 are in the space above the partition member Pa (second space 20S). Positioned.
Since the projection plane Sc is arranged in the first space 10S, the user (the observer of the image projected on the projection plane Sc) also observes the image in the first space 10S. That is, the projector 1 is arranged so that the main body 1A and the like located in the second space 20S are not visible to the user.

  As shown in FIG. 2, the partition member Pa includes a first member Pa <b> 1 located on the + X side of the second storage part 52 and a second member Pa <b> 2 located on the −X side of the second storage part 52. ing. And between the 1st member Pa1 and the 2nd member Pa2, the opening part Pah which can arrange | position the 2nd accommodating part 52 is provided. The second member Pa2 is configured to be slidable in the direction along the ceiling Ce, and the projector 1 is attached to and detached from the ceiling Ce by sliding the second member Pa2.

  Moreover, since the remote control light-receiving part 7 is arrange | positioned at the front end side accommodating part 5P, it is located in the 1st space 10S. Further, since the remote control light receiving unit 7 is disposed in the inclined wall portion 522 so that the central axis of the directivity characteristic is obliquely downward, it emits at a position below the third storage unit 53 or at a position away from the projection surface Sc. The optical signal of the remote control to be received can be received.

As described above, according to the present embodiment, the following effects can be obtained.
(1) In the projection optical apparatus 1B, a distal end side storage portion 5P (a separation portion) that stores the exit side lens 431 is disposed away from the main body portion 1A. Thus, by using the partition member Pa in a suspended state, a part of the main body 1A and the projection optical device 1B can be hidden. Therefore, it is possible to provide the projector 1 that gives the user a feeling of pressure and is installed with reduced loss of aesthetics in the room (first space 10S) and allows the user to observe the image in a more open environment. It becomes. In particular, the present invention has a remarkable effect in a projector that increases in size for projecting an image with high brightness or high resolution.

(2) Since the projection optical apparatus 1B includes the first optical system 41 to the third optical system 43 arranged in a substantially U shape, the light emitted from the main body 1A is bent so that the main body 1A It is possible to project an enlarged image on the projection surface Sc arranged on the side opposite to the direction of the emitted light.
In addition, since the projection optical apparatus 1B includes a lens that widens the light incident on the third optical system 43, it is possible to perform an enlarged projection from a position close to the projection plane Sc.
In addition, it is possible to configure the projector 1 that is disposed closer to the projection plane Sc than the user who observes the image. Therefore, even if it is difficult for the user to recognize the position of the projector 1 by not visually recognizing a part of the main body 1A and the projection optical device 1B, the user cannot connect the projector 1 to the projection surface Sc. It is possible to avoid the intrusion and the light from the projector 1 being blocked. Therefore, it is possible to provide a projector that increases the degree of freedom of the position where the user observes the image.
Further, since the projection optical device 1B is formed in a substantially U shape, the projector 1 can be reduced in size in the front-rear direction (X direction).

  (3) The projector 1 is configured such that a part of the second storage portion 52 is inserted into the hollow portion 21 of the exterior housing 2. Thereby, the projector 1 can be further reduced in size in the front-rear direction (X direction). In addition, since the main body 1A and the projection optical apparatus 1B can be viewed as an integrated projector 1, the appearance of the projector 1 can be improved.

(4) In the projector 1, the remote control light receiving unit 7 is disposed in the front end side storage unit 5P. Thus, even when the main body 1A is installed so as to be hidden by the partition member Pa, it is possible to receive an optical signal by a user's remote control operation. Therefore, it is possible to provide the projector 1 that is installed while suppressing the user's feeling of pressure and has good usability.
Furthermore, since the remote control light receiving unit 7 is arranged so that the central axis of the directional characteristic is obliquely downward in the ceiling state, the remote control light receiving unit 7 can receive the optical signal by the remote control operation from various positions of the user. Become.

(Second Embodiment)
Hereinafter, the projector 100 according to the second embodiment will be described with reference to the drawings. In the following description, the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted or simplified.
FIG. 4 is a schematic diagram for explaining a main configuration of the projector 100 according to the present embodiment, and is a diagram illustrating an example of a usage pattern of the projector 100. Specifically, FIG. 4 is a diagram showing a state (wall-hanging state) supported by the indoor wall portion Wa via the support tool Mt.
As shown in FIG. 4, the projector 100 according to the present embodiment includes a projection optical apparatus 100B that is different from the projection optical apparatus 1B according to the first embodiment. The main body 100A of the projector 100 according to the present embodiment further includes an imaging unit 107 as a light receiving unit in addition to the remote control light receiving unit 7 (not shown in FIG. 4).

  As shown in FIG. 4, in the projector 100 according to the present embodiment, the main body 100A is fixed to the back side of the indoor wall Wa, and a part of the projection optical device 100B protrudes from the opening Wah provided in the wall Wa. Can be installed. Then, the projector 100 projects an image on the projection surface Sc disposed at a position facing the wall Wa. For convenience of explanation, the X direction, the Y direction, and the Z direction are described so that the main body 100A of the present embodiment corresponds to the main body 1A of the first embodiment. That is, the direction of light emitted from the main body 100A is the + X direction, the direction from the wall Wa toward the projection surface Sc is the -Z direction, and the right side of the projector 1 viewed from the side facing the projection surface Sc is the + Y side. As described.

As shown in FIG. 4, the projection optical apparatus 100B includes a first optical system 141, a reflection mirror 14R as a reflection unit, a second optical system 142, and a lens housing 150 that houses these optical systems.
The first optical system 141 has a plurality of lenses (one lens is shown in FIG. 4), and refracts the light emitted from the cross dichroic prism 352.

  The reflection mirror 14R is disposed on the + X side of the first optical system 141, and reflects the light emitted from the first optical system 141 to the -Z side. Similar to the first embodiment, the −Z direction is a direction intersecting the optical axis Ax of the light emitted from the main body 100A (in the present embodiment, a direction orthogonal), and corresponds to the first direction.

The second optical system 142 includes a plurality of lenses (showing one lens (exit-side lens 1422) in FIG. 4), and refracts the light reflected by the reflecting mirror 14R.
The second optical system 142 includes an exit-side lens 1422 disposed on the most light exit side among the plurality of lenses, widens the angle of the light reflected by the reflection mirror 14R, and projects it in the −X direction. In other words, as shown in FIG. 4, the projection optical apparatus 100 </ b> B is disposed on the −Z side of the projector 100 and projects an image on a projection plane Sc that is orthogonal to the Z direction. In addition, the projection optical device 100B can perform enlarged projection at a position close to the projection surface Sc, and the projector 100 functions as a short focus projector by mounting the projection optical device 100B.

As shown in FIG. 4, the lens housing 150 includes a first storage unit 151 that stores the first optical system 141, and a second storage unit 152 that stores the reflection mirror 14 </ b> R and the second optical system 142. Yes.
As shown in FIG. 4, the second storage portion 152 extends along the Z direction and has a distal end side storage portion 150 </ b> P that stores the emission side lens 1422.
The distal end side storage portion 150P is disposed to be separated from the main body portion 100A in the Z direction, that is, the first direction, and corresponds to a separation portion.

The imaging unit 107 includes, for example, an imaging element (not shown) such as a charge coupled device (CCD) or a complementary metal oxide semiconductor (CMOS), and as shown in FIG. 4, an exit side lens 1422 in the distal end side storage unit 150P. It is arranged on the −X side.
The imaging unit 107 captures the projection plane Sc as a subject, and outputs information corresponding to the captured image to the control unit 6. The control unit 6 adjusts or changes the image based on the output of the imaging unit 107. For example, the imaging unit 107 detects an infrared light emitted from a trapezoidally distorted image projected on the projection surface Sc or an pointing tool (such as an electronic pen) operated on the projection surface Sc. . Based on the output of the imaging unit 107, the control unit 6 performs adjustment of an image distorted in a trapezoidal shape, an instruction to project a superimposed image in which the locus of the pointing tool is superimposed on the image information, and the like.
Note that the remote control light receiving unit 7 (not shown in FIG. 4) is disposed in the distal end side storage unit 150P.

As described above, the projection optical device 100B is formed in an approximately L shape, and the distal end side storage portion 150P that stores the exit side lens 1422 and the imaging unit 107 is separated from the main body portion 100A in the Z direction, and the main body portion 100A. It is attached to.
In the projector 100, as shown in FIG. 4, the main body portion 100A is fixed to the back side of the wall portion Wa via the support Mt, and the front end side storage portion 150P projects from the opening portion Wah to the front side of the wall portion Wa. Be placed.
Since the projection surface Sc is disposed in the space on the front side of the wall Wa, the projector 100 is disposed such that the main body 100A cannot be seen from the user (the observer of the image projected on the projection surface Sc).
Since the imaging unit 107 is disposed in the distal-end-side storage unit 150P, it is possible to capture the projection plane Sc even when the projector 100 is installed on the wall Wa.

As described above, according to the present embodiment, the following effects can be obtained.
(1) In the projection optical apparatus 100B, the distal end side storage portion 150P (separation portion) that stores the emission side lens 1422 is disposed away from the main body portion 100A. This makes it possible to hide part of the main body 100A and the projection optical device 100B in the wall-mounted state. Therefore, it is possible to provide the projector 100 that gives a feeling of pressure to the user and that is installed with reduced loss of aesthetics in the room and allows the user to observe an image in a more open environment.

(2) Since the projection optical apparatus 100B includes the optical system arranged in an approximately L shape, the light emitted from the main body 100A is bent and intersects the direction of the light emitted from the main body 100A. Thus, it is possible to project an enlarged image on the projection surface Sc arranged on the screen.
Further, since the projection optical apparatus 100B includes a lens that widens the light incident on the second optical system 142, it is possible to perform an enlarged projection from a position close to the projection surface Sc.

  (3) Since the projector 100 includes the imaging unit 107 disposed in the distal end side storage unit 150P, even when the main body 100A is installed so as to be hidden by the wall Wa, the projection plane Sc And adjusting or changing the image based on the captured information.

(Modification)
In addition, you may change the said embodiment as follows.
In the first embodiment, the mode in which the main body 1A is attached to the surface of the ceiling Ce as a ceiling suspended state of the projector 1 is illustrated, but the main body 1A is attached to the back surface of the ceiling Ce, and the ceiling Ce is the front end side storage 5P. And a configuration configured as a partition member disposed between the main body 1A and the main body 1A.
Moreover, the aspect by which the projector 1 of 1st Embodiment is installed in wall part Wa may be sufficient. In the case of this configuration, it is possible to perform projection using the wall portion Wa and the partition member provided in parallel with the wall portion Wa to conceal the main body portion 1A and use the floor or a member provided in parallel on the floor as a projection plane.

In the second embodiment, an example in which the main body portion 100A is attached to the back surface of the wall portion Wa as the wall hanging state of the projector 100 is illustrated. However, the main body portion 100A is attached to the front surface of the wall portion Wa. The aspect which arrange | positions a partition member between 100 A of parts may be sufficient.
Further, the projector 100 according to the second embodiment may be installed on the ceiling Ce. In the case of this configuration, it is possible to perform projection using the ceiling Ce or a partition member arranged in parallel on the ceiling Ce to conceal the main body portion 100A and use the floor or a member arranged in parallel on the floor as a projection plane.

The projectors 1 and 100 may be arranged in a stationary posture, and the main body 1A and 100A may be concealed using the floor surface or a member arranged on the floor surface as a partition member.
Moreover, the aspect which arrange | positions the projector 1100 with attitude | positions other than the attitude | position of the projector 1100 mentioned above, and hides the main-body parts 1A and 100A using a partition member may be sufficient.

The projector 1 of the first embodiment may be configured to include the imaging unit 107 as a light receiving unit.
In the above embodiment, the remote control light receiving unit 7 and the imaging unit 107 are exemplified as the light receiving unit, but the present invention is not limited to this as long as it is an element that outputs a signal corresponding to the received light. For example, an illuminance sensor that detects illuminance can be exemplified as the light receiving unit. According to this configuration, the projectors 1 and 100 can project an image according to the brightness of the room (first space 10S), so that a clear image can be provided by the user.

In the projector 1 of the embodiment, a transmissive liquid crystal panel is used as the light modulation device 351. However, a reflective liquid crystal panel may be used.
In addition, the light modulation device 351 of the above embodiment employs a so-called three-plate method using three light modulation devices corresponding to R light, G light, and B light. Or may be applied to a projector including two or four or more light modulation devices.
Further, a micromirror type light modulation device such as a DMD (Digital Micromirror Device) may be used as the light modulation device.

  The light source device 31 of the embodiment employs the discharge-type light source 311, but may be composed of other types of light sources, solid-state light sources such as light emitting diodes and lasers.

  DESCRIPTION OF SYMBOLS 1,100 ... Projector, 1A, 100A ... Main-body part, 1B, 100B ... Projection optical apparatus, 2 ... Exterior housing, 3 ... Optical unit, 5,150 ... Lens housing, 5P, 150P ... Front end side storage part (separation) Part), 6 ... control part, 7 ... remote control light receiving part (light receiving part), 31 ... light source device, 41, 141 ... first optical system, 42, 142 ... second optical system, 43 ... third optical system, 107 ... Imaging unit (light receiving unit), 311... Light source, 351, 351B, 351G, 351R... Light modulation device, 421... Reflection mirror (first reflection unit), 422 ... reflection mirror (second reflection unit), 431, 1422. Side lens, 14R: reflection mirror (reflection part), Ax: optical axis, Sc: projection plane.

Claims (5)

A projector that projects an image onto a projection surface,
A main body comprising a light source and a light modulation device that modulates light emitted from the light source;
A projection optical device that projects from the main body and projects light emitted from the main body;
With
The projection optical device includes:
Multiple lenses,
A lens housing that houses the plurality of lenses;
With
The lens housing has a separation portion that is separated from the main body portion in a first direction intersecting an optical axis of light emitted from the main body portion,
The said separation | spacing part accommodates the emission side lens arrange | positioned at the light emission side most among these lenses. The projector according to claim 1,
The projection optical device includes:
A first optical system for refracting light emitted from the main body,
A first reflecting portion that reflects light emitted from the first optical system toward the first direction side, and a light that travels toward the first direction side is opposite to the direction of light emitted from the main body portion. A second optical system having a second reflecting portion that reflects toward the second direction;
A third optical system having the exit side lens and refracting light emitted from the second optical system;
With
The projector is characterized in that the separation unit houses the third optical system. The projector according to claim 1,
The projection optical device includes:
A first optical system for refracting light emitted from the main body,
A reflecting portion that reflects the light emitted from the first optical system toward the first direction;
A second optical system having the exit lens and refracting the light reflected by the reflecting portion;
A projector comprising: It is a projector as described in any one of Claims 1-3, Comprising:
The projection optical apparatus includes a lens group including the exit side lens,
The projector is characterized in that the lens group is a wide-angle lens group that widens and emits incident light. It is a projector as described in any one of Claims 1-4, Comprising:
The projector is
A light receiving portion that is disposed in the separation portion and outputs a signal corresponding to the received light;
A control unit for controlling the operation of the projector according to the output of the light receiving unit;
A projector comprising:

Images