JP3444274B2 - projector - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector which forms a projected image by modulating and projecting a light beam emitted from a light source.

[0002]

BACKGROUND ART In recent years, the environment in which projectors are used is expanding, and in addition to being used for in-house meetings and presentations during business trips, it is also possible to capture CAD / CAM / CAE data and project it in an enlarged manner, for research and development departments, etc. It is also used for technical study meetings in Japan, various seminars and workshops, and even classes at schools that provide audiovisual education. Further, it is also used for projecting medical images and data such as CT scan and MRI to be useful for studying treatment methods, medical guidance, etc., and effectively directing exhibitions and large-scale events.

As described above, at present, when the projector is used in a certain environment, the specifications and functions required for the projector are various, and a lightweight and compact model in pursuit of portability, a high brightness model in pursuit of image quality, and high resolution. There are models, high-performance models that enable connection with various digital devices and mobile tools. Since it is expected that the environment in which it will be used will further expand, high-value-added projectors are being actively developed in consideration of a new environment for use. In such a situation, the development of a lightweight and compact model is important because of the great demand expected.

By the way, the projector is provided with a circuit board such as a driver board for controlling internal parts such as an internal optical unit and a cooling fan. This circuit board is often placed in a flat state above other internal parts, and the rear side (back side) of the circuit board is an interface in which various connectors are exposed from the outer case. It is a part.

[0005]

However, since the size and number of the connectors mounted on the interface part are almost fixed, it is not possible to easily reduce the size of the surface part exposing the connectors, and the exterior. There is a problem that the size of the case and the projector as a whole are reduced.

At this time, it is conceivable that the connectors are not mounted only on one side edge such as the rear side of the driver board, but are mounted along the two side edges forming the corner portion of the board. In such a case, Must be provided with openings (two) for exposing each connector, for example, on both surface portions of the back surface portion and the side surface portion of the outer case,
The strength of the intermediate portion between the two openings may be reduced.
For this reason, it is necessary to reinforce the back and side parts, but this requires extra reinforcing members, complicates the structure, etc., and makes it difficult to handle the connecting cable across the two cable exit directions. As a result, reduction in size and weight is hindered.

An object of the present invention is to provide a projector which can surely be reduced in size and weight.

[0008]

The projector of the present invention SUMMARY OF THE INVENTION can be a projector to form a projected image is enlarged and projected after modulating the light flux emitted from the light source, the Puroji
Located above or below the circuit board that makes up the
Outline of a support that supports optical components for projection image formation
Corresponding inclined shape, and wherein the interface section along a plane intersecting obliquely with respect to the longitudinal direction in a plan view are al provided.

With such a configuration, the width dimension of the inclined edge in the direction orthogonal to the front-rear direction of the projector is shorter than the length dimension of the inclined edge itself .
Size and weight of the projector is promoted. Also, the circuit board
The plate was placed flat above the support for the optical components.
Even if the outer part of the support for optical components and the circuit board
Is better, and is still useless in the projector.
There is no space. In addition, the interface section is
Even in the transmission route, it is easily affected by noise related to electromagnetic interference
Since it is a part, the vicinity of such an interface part
Is a power source that is likely to become a noise source inside the projector.
Support for optical components that are less likely to be a noise source than
It is often the case that a carrier is placed so that no noise is present in the transmission line.
There is no need to worry about riding. In the projector of the present invention,
The outer case internal components are accommodated, including a circuit board, characterized that you have exposure opening for exposing the interface portion is provided. In such a configuration, the
At the edges, orthogonal to the front-back direction of the projector
The width dimension in the direction of rotation is shorter than the length dimension of the inclined edge itself.
Therefore, the width dimension of the exposure opening required to expose the inclined side edge is also reduced to the same extent as the width dimension. Therefore, the width dimension of the exposure opening is smaller than that in a general case where the interface portion is provided on the edge of the circuit board that is orthogonal to the front-rear direction, and thus the width dimension of the outer case is reduced accordingly. And eventually a project
The reduction in size and weight of the kuta is promoted.

At this time, since the exposure opening may be provided on one surface portion such as the back surface portion forming the exterior case, an extra reinforcing member or the like is not required, and the reduction in size and weight is surely promoted.

In the projector of the present invention, the exterior case is provided with an inclined surface corresponding to the obliquely intersecting surface, and the exposure opening is provided in the inclined surface.

In such a structure, since the outer case is formed close to the inclined interface section, it is difficult to produce a dead space such as a dead space between the interface section and the outer case, and the projector is small and lightweight. Is promoted further.

[0013]

[0014]

[0015]

[0016]

In the projector of the present invention, the support has an outer shape according to the degree of narrowing down of the light flux.

With such a structure, it is possible to further reduce the size and weight of the support, and further to further reduce the size and weight of the projector.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

[1. Main Configuration of Projector] FIG.
2 is an overall perspective view of the projector 1 according to the present embodiment as seen from above, FIG. 2 is an overall perspective view of the projector 1 as seen from below, and FIG. 3 is a perspective view showing the inside of the projector 1. 1 to 3, the projector 1 includes an outer case 2, a power supply unit 3 housed in the outer case 2, and a planar L-shaped optical unit 4 also arranged in the outer case 2. .

As shown in FIG. 4, the outer case 2 is composed of an upper case 21 made of synthetic resin, a lower case 22 made of metal such as aluminum, and a front case 23 also made of metal such as aluminum. There is. These cases 21, 22 and 23 are fixed to each other with screws.

The upper case 21 has a shape in which an upper surface portion 211 and a rear surface portion 212 are integrally molded. Upper surface 2
A porous first electromagnetic shield member 213 formed by punching an aluminum plate is detachably provided on the inner side of 11. A second electromagnetic shield member 214 made of an aluminum plate is also provided on the inner side of the back surface 212 of the upper case 21. The second electromagnetic shielding member 214 is
It is screwed to the lower case 22 side.

The lower case 22 has a shape in which a bottom surface portion 221 and a pair of side surface portions 222 facing each other are integrally formed, and by bending an aluminum plate or the like having a predetermined shape processed by a press, a machining center, or the like. The bottom surface portion 221 and the side surface portion 222 are formed by bending each other.

At both front corners of the bottom surface portion 221, a height position adjusting mechanism 7 is provided for adjusting the inclination of the entire projector 1 to position the projected image. On the other hand, only the resin foot member 6 (FIG. 2) is fitted to the central portion on the rear side of the bottom surface portion 221.

The front case 23 is a member that forms the front surface portion 231 of the outer case 2, and is formed by bending or drawing an aluminum plate or the like having a predetermined shape which is also processed by a press, a machining center or the like. The front case 23 is provided with a round hole opening 232 corresponding to the projection lens 46, and the periphery of the round hole opening 232 is curved inward by drawing.

In such an outer case 2, intake ports 2A, 2B, 2C for taking in cooling air inside and exhaust ports 2D, 2E for discharging cooling air from inside are provided.
In addition, an operation panel 2F and a large number of holes 2G corresponding to the positions of the speakers are provided. Further, on the back side of the outer case 2, as shown in FIG. 2, an exposure opening 21 for exposing various connectors 80, 90 for interfaces.
5 are provided. The power supply unit 3 is the outer case 2
The main power supply 31 is arranged on the front side in FIG. 3 and the ballast 32 is arranged behind the main power supply 31. The main power supply 31 supplies the power supplied through the power cable to the ballast 32, a driver board (electronic circuit board) not shown, etc., and surrounds the inlet connector 33 (FIG. 2) into which the power cable is inserted. An aluminum frame 34, a power supply circuit (not shown) and the like are provided. The ballast 32 mainly supplies electric power to a light source lamp (described later) of the optical unit 4 and includes a lamp drive circuit.

As shown in FIG. 5, the optical unit 4 includes an integrator illumination optical system 41, a color separation optical system 42, a relay optical system 43, an electro-optical device 44, a cross dichroic prism 45 as a color synthesizing optical system, and projection. A projection lens 46 as an optical system is provided.

[2. Detailed Configuration of Optical System] In FIG. 5, an integrator illumination optical system 41 includes a light source lamp 41.
1 and a reflector 412, a light source device 413, a first lens array 414, a polarization conversion element 415, and a second
And a lens array 416. Light source lamp 411
After being reflected by the reflector 412 so as to be converged at the condensing point, the luminous flux emitted from is divided into a plurality of partial luminous fluxes by the first lens array 414 arranged at an intermediate position up to the converging point, and The polarized light is converted into one type of polarized light by the polarization conversion element 415, and the second lens array 416
Incident on. In addition, such a polarization conversion element 415 is
For example, it is introduced in JP-A-8-304739. Each partial luminous flux converted into one type of polarized light by the polarization conversion element 415 is condensed on the condenser lens 417, and finally as three light modulators (light valves) that configure the electro-optical device 44. It is almost superimposed on the liquid crystal panel 441 (shown as liquid crystal panels 441R, 441G, and 441B for each color light).

The color separation optical system 42 is provided with two dichroic mirrors 421 and 422 and a reflection mirror 423, and a plurality of partial light beams emitted from the integrator illumination optical system 41 by the mirrors 421 and 422 are divided into red and green, respectively. It has the function of separating the light of three colors of blue.

The relay optical system 43 includes an incident side lens 43.
1, relay lens 433, and reflection mirrors 432, 4
34, and has a function of guiding the color light separated by the color separation optical system 42, for example, blue light to the liquid crystal panel 441B.

The electro-optical device 44 includes liquid crystal panels 441R, 441G and 441B which are three light modulators,
These use, for example, a polysilicon TFT as a switching element, and the respective color lights separated by the color separation optical system 42 are supplied to these three liquid crystal panels 441R, 441.
41G, 441B modulates according to image information to form an optical image.

The cross dichroic prism 45 has three
The image modulated for each color light emitted from the liquid crystal panels 441R, 441G, and 441B is combined to form a color image. In the prism 45, a dielectric multilayer film that reflects red light and a dielectric multilayer film that reflects blue light are formed in a substantially X shape along the interfaces of the four rectangular prisms. Three color lights are combined by the multilayer film. Then, the color image combined by the prism 45 is emitted from the projection lens 46 and enlarged and projected on the screen.

Each of the optical systems 41 to 45 described above is shown in FIG.
It is accommodated in a light guide 47 made of synthetic resin as a support shown in FIG. That is, in addition to the light source protection unit 471 that covers the light source device 413, the light guide 47 includes the above-described optical components 414 to 416, 421 to 423, and 431 to 43.
Grooves 472 to 481 into which 4 is slidably fitted from above
Is provided. Here, the polarization conversion element 415 and the second lens array 416, which are integrally unitized, are fitted into the groove 473. And the light guide 47
A cover 48 shown in FIG. 3 is attached to the.

A head portion 49 (FIGS. 6 and 7) is formed on the light emitting side of the light guide 47. Liquid crystal panels 441R, 441G, 441 are provided on one end side of the head portion 49.
The prism 45 to which B is integrally attached is fixed, and the projection lens 4 is mounted on the flange along the semi-cylindrical portion on the other end side.
6 is fixed.

[3. Cooling Structure] In FIG. 1 to FIG. 3, in the projector 1, the first cooling system A in which the cooling air sucked from the intake port 2A on the side of the projection lens 46 and the bottom of the exterior case 2 is exhausted from the exhaust port 2D, the exterior The second cooling system B in which the cooling air sucked from the intake port 2B provided on the side surface of the case 2 is exhausted from the exhaust port 2E and the cooling air sucked from the intake port 2C provided on the bottom surface of the exterior case 2 are A third cooling system C exhausted from the exhaust port 2E is formed.

In the first cooling system A, an axial flow intake fan 51 (shown by a chain line in FIG. 3) is provided on the projection lens 46 side of the main power source 31, and a first sirocco fan is provided on the light source device 413 side of the ballast 32. 52 is provided. The cooling air sucked from the side of the projection lens 46 and the intake port 2 </ b> A by driving the axial-flow intake fan 51 is sucked into the first sirocco fan 52 after cooling the main power supply 31. Further, due to the suction action of the first sirocco fan 52, the intake port 2A
A part of the cooling air from flows to the sirocco fan 52 side while cooling the ballast 32, and is sucked. The cooling air discharged from the first sirocco fan 52 enters the light source protection part 471 from the intake cutout 471A provided in the light guide 47 to cool the light source device 413 from the rear side, and the exhaust cutout 471B (see FIG. 6), and finally to the outside of the exterior case 2 through the exhaust port 2D.

In the second cooling system B, as shown in the sectional views of FIGS. 7 and 8, a second sirocco fan 53 is provided below the projection lens 46. This second sirocco fan 5
3 is arranged in the middle of a duct member 60 (FIG. 6) that guides the cooling air from the intake port 2B to below the electro-optical device 44. The intake air sucked from the intake port 2B is supplied to the duct member 6
After being guided to 0, it is sucked into the second sirocco fan 53 and discharged along the bottom surface of the outer case 2, and then the electro-optical device 44 is cooled. After this, the cooling air is fed to the driver board 8 as a circuit board, which is laid flat on the top.
While cooling (the two-dot chain line in FIG. 3 and FIGS. 9 and 10), the air flows toward the axial exhaust fan 54 on the rear side, and is exhausted from the exhaust port 2E by the exhaust fan 54.

In the third cooling system C, a third sirocco fan 55 is provided at a position corresponding to the intake port 2C on the bottom surface of the outer case 2 on the lower surface of the light guide 47, as indicated by a dashed line in FIG. . The intake port 2C has a small diameter for each hole, thereby making it difficult to suck dust and the like present on the installation location of the projector 1. The cooling air sucked into the third sirocco fan 55 from the intake port 2C is discharged to the light source device 413 side through the duct-shaped portion formed between the bottom surface of the outer case 2 and the lower surface of the light guide 47, and then the light is emitted. The unit (the unit including the polarization conversion element 415 and the second lens array 416) guided to the intake opening 473A (FIG. 6) provided corresponding to the groove 473 of the guide 47 and arranged in the groove 473 is installed. Cool from bottom to top. After this, the cooling air is exhausted from the exhaust opening 48A (FIG. 3) of the cover 48 and finally exhausted from the exhaust port 2E by the axial exhaust fan 54 on the back side.

[4. Structure of Circuit Board and Interface Portion] In FIGS. 1, 9 and 10, the driver board 8 as one circuit board has electronic circuit components mounted on both front and back surfaces of a general multi-layer board made of glass, epoxy resin or the like. With this configuration, it has a function of driving and controlling the electro-optical device 44, the fans 51, 52, 55 and the like based on various signals input via the operation panel 2F or the connector 80 on the rear surface side. A communication opening 8A is provided in the center of the driver board 8, and the liquid crystal panels 441R, 441G, 441B and the board 8 are provided through the communication opening 8A.
Is connected to the upper surface side, and cooling air after cooling the liquid crystal panels 441R, 441G, and 441B is guided to the upper surface side.

The rear side edge of the driver board 8 is, as shown in plan view in FIG.
Is an inclined edge 81 along the direction (arrow EE) inclined with respect to the front-back direction (arrow DD).

Further, as shown in FIG. 9, an elongated mounting substrate 9 is provided below the driver board 8.
The mounting board 9 is made of the same material as that described above, is used exclusively for mounting a plurality of connectors 90, and is electrically connected to the driver board 8. This mounting board 9
Is also a circuit board. An arrow E- is also provided on the back side of the mounting substrate 9.
An inclined edge 91 along E is formed.

A plurality of connectors 80 are mounted on the driver board 8. A plurality of connectors 90 are mounted on the driver board 9. And the connector 8
Interface unit 10 according to the present invention including 0, 90
Are formed. The connector 80 is mounted along an inclined side edge 81 inclined in the arrow EE direction, and the connector 90 is mounted along an inclined side edge 91 inclined in the arrow EE direction. Therefore, the interface unit 10 including the connectors 80 and 90 has the arrow E-E.
It is provided along the direction, that is, along the surface that obliquely intersects the front-back direction (arrow DD).

As shown in FIG. 10, the actual width dimension L1 of the interface section 10 and the width dimension W1 in the direction orthogonal to the front-rear direction have a relationship of W1 <L1. Further, the width dimension of the exposure opening 215 of the back surface portion 212 provided for exposing the interface portion 10 is also W1.
Is almost the same as.

The interface section 10 is also arranged along the outer shape of the light guide 47.
The light flux in the light guide 47 is narrowed down so as to be condensed from the second lens array 416 shown in FIG. 5 to the incident side lens 431. The degree of narrowing at this time is
The light guide 47 is represented by the inclination of the arrow G with respect to the optical axis F. Therefore, when the diameter of the light guide 47 is reduced according to the narrowing of the light flux, the outer shape of the light guide 47 becomes the arrow G (see FIG. 3).
See also) the shape along the inclination direction. In the present embodiment, the degree of inclination of the outer shape of the light guide 47 and the degree of inclination of the interface unit 10 are made substantially the same by making the direction of the arrow E-E substantially coincide with the direction of the arrow G.

Further, the driver board 8 is fixed by screws 102 to the upper stage side fixing portion 101 of the aluminum fixing plate 100 hanging along the inclined side edge 81, especially at both end sides of the inclined side edge 81, and mounted. The substrate 9 is fixed to the lower fixing portion 103 of the fixing plate 100 with screws 104. This fixing plate 100 is also provided along the direction of the arrow E-E, that is, along the surface that obliquely intersects the front-back direction (arrow D-D).

The fixing plate 100 is mounted on the washer 10 on an upright portion 223 (FIG. 7) provided on the back side of the lower case 22.
5 and the screws 106, and as shown in FIG. 2, it is exposed in the exposure opening 215 provided in the back surface portion 212 of the upper case 21. At this time, the portion of the back surface 212 where the exposure opening 215 is provided is also an inclined surface 216 that is gently inclined along the arrow EE in a plan view, and an upper surface continuous with the inclined surface 216. The edges of the portion 211 form an inclined outer contour in a plan view. Although not shown, the inclined portion is also formed on the opposite side of the upper case 21, that is, on the exhaust port 2D (FIG. 2) side.

Since the fixing plate 100 is made of aluminum, it also functions as an electromagnetic shielding plate that closes the exposure opening 215.

[5. Effects of Embodiments] (1) Since the interface unit 10 is arranged along a plane that obliquely intersects the front-rear direction (arrow DD) of the projector 1 (in the arrow E-E direction), The width W1 in the direction orthogonal to the direction can be made shorter than the actual width L1 of the interface unit 10, and the width of the exposure opening 215 required to expose the interface unit 10 is also as small as W1. it can. Therefore, the width dimension of the exposure opening 215 can be reduced as compared with the general case where the interface portion is provided so as to be orthogonal to the front-rear direction, and thus the outer case 2 can be reduced by that amount, which in turn reduces the size of the projector 1. It can promote weight reduction.

At this time, since the exposure opening 215 may be provided on one surface of the back surface portion 212 forming the exterior case 2, an extra reinforcing member and the like can be eliminated, and the reduction in size and weight can be surely promoted.

(2) On the back surface portion 212 of the outer case 2, a portion where the opening 215 for exposure is provided is indicated by an arrow EE.
The inclined surface 21 corresponding to the direction, that is, the surface that diagonally intersects
6 and the arrow EE on the upper surface 211.
Since the portion corresponding to the direction, that is, the surface that diagonally intersects with each other forms the outer shell that is inclined in a plan view, the back surface portion 212 and the like can be formed close to the inclined interface portion 10, and the interface portion 10 and the back surface portion 212 can be formed. A dead space is less likely to occur between the and, and the size and weight of the projector 1 can be further reduced.

Further, the outer case 2 can be made into a variety of ones having a slanted surface 216 and a slanted outer shape, instead of an ordinary rectangular shape, so that the external appearance can be improved.

(3) Since the interface section 10 is inclined in accordance with the reduced outer shape of the light guide 47, a dead space can be eliminated and the projector 1 can be made smaller and lighter.

(4) The light guide 47 is arranged in the vicinity of the interface section 10. The light guide 47 has optical parts 414 to 416, 421 to 423, 4 respectively.
Since it is a component that supports 31 to 434, unlike the power supply unit 3 or the like, there is no possibility of becoming a noise source. Therefore, from the inside of the projector 1, the interface unit 10
It is not necessary to worry about the influence of noise on the interface unit 10, and the signal transmission in the interface unit 10 can be favorably performed.

(5) Since the outer shape of the light guide 47 is reduced in accordance with the degree of narrowing of the light beam, the light guide 47 itself can be made smaller and lighter, and the projector 1 can be made smaller and lighter. Can be promoted.

[6. Modification] The present invention is not limited to the above-described embodiment, and includes other configurations and the like that can achieve the object of the present invention, and the following modifications and the like are also included in the present invention. For example, in the above-described embodiment, the interface section 10 is inclined corresponding to the reduced outer shape of the light guide 47, but when another internal component is arranged near the inclined edge according to the present invention. For example, it may be inclined according to the outer shape of the internal component. However, as the internal parts in this case, parts that are less likely to become a noise source with respect to the interface part are preferable.

Further, in the above-mentioned embodiment, the driver board 8 and the mounting substrate 9 are respectively provided with the inclined side edges 8.
1 and 91, the inclined edges 81 and 91 are
Not necessarily required. That is, regardless of the shapes of the driver board 8 and the mounting substrate 9, the interface section 10 may be arranged along a surface that obliquely intersects the front-rear direction (arrow DD).

The back portion 21 of the outer case 2 of the above embodiment
In No. 2, the inclined surface 216 was provided with the exposure opening 215, but even if there is no such inclined surface, it is included in the present invention. For example, although the interface portion is attached in a slanted manner, the rear surface portion may be formed so as to have a substantially linear shape in a plan view, and the rear surface portion may be provided with an exposure opening.

The exposure opening 215 of the above-described embodiment is also used.
Has a large size so that substantially the entire interface section 10 including the fixing plate 100 can be exposed. For example, like the openings provided in the fixing plate 100, the connectors 80, 9
A plurality of openings may be provided so that only 0 is exposed, and the opening for exposure may be formed by the whole of these openings.

Although the driver board 8 is arranged above the internal parts such as the optical unit 4 in the above embodiment, the driver board may be arranged below the internal parts.

Further, it is not necessary to use a plurality of circuit boards as the circuit boards on which the connectors 80 and 90 are mounted, unlike the driver board 8 and the mounting board 9. For example, all the connectors are mounted on the mounting board. Well, on the contrary,
All connectors may be mounted on the driver board.

In the above-mentioned embodiment, only the example of the projector using the three light modulating devices is given, but the present invention is a projector using only one light modulating device, a projector using two light modulating devices, Alternatively, it can be applied to a projector using four or more light modulators. Further, in the above-described embodiment, the liquid crystal panel is used as the light modulator, but a device using a micromirror, etc.
A light modulator other than liquid crystal may be used. Further, in the above-described embodiment, the transmissive light modulator having the light incident surface and the light exit surface different from each other is used, but the reflective light modulator having the same light incident surface and the light exit surface is used. Is also good. Furthermore, in the above-described embodiment, only an example of the front type projector that projects from the direction in which the screen is observed is given, but the present invention is a rear type projector that projects from the side opposite to the direction in which the screen is observed. It is also applicable to.

[0062]

As described above, according to the present invention,
Compared to the general case where the interface section is provided on the edge of the circuit board that is orthogonal to the front-rear direction, the width of the exposure opening can be made smaller, and the outer case is made smaller by that amount, making the projector smaller and lighter. There is an effect that it can promote

[Brief description of drawings]

FIG. 1 is an overall perspective view of a projector according to an embodiment of the present invention seen from above.

FIG. 2 is an overall perspective view of the projector as seen from below.

FIG. 3 is a perspective view showing the inside of the projector.

FIG. 4 is an exploded perspective view of the outer case of the embodiment.

FIG. 5 is a plan view schematically showing each optical system of the projector.

FIG. 6 is a perspective view showing constituent members of an optical unit of the projector.

7 is a vertical cross-sectional view as seen from an arrow VII-VII in FIG.

8 is a vertical cross-sectional view as seen from an arrow VIII-VIII in FIG.

FIG. 9 is an exploded perspective view showing a main part of the embodiment.

FIG. 10 is a plan view schematically showing the main part.

[Explanation of symbols]

1 projector 8 Circuit board and driver board 9 Mounting board that is a circuit board 10 Interface part 47 Light guide as a support 81, 91 inclined edge 215 Exposure opening 216 slope

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03B 21/00-21/30 H05K 5/00-5/06

Claims (4)

(57) [Claims] 1. A projector for forming a projection image by modulating a light flux emitted from a light source and then projecting the light beam in an enlarged manner, wherein the projection image forming optical device is arranged above or below a circuit board constituting the projector. projector part are inclined to correspond to the outer shape of the support body supported, and wherein the interface section along a plane intersecting obliquely with respect to the longitudinal direction in a plan view is al provided . 2. The projector according to claim 1,
The exterior case, in which the internal parts including the circuit board are accommodated, is provided with an exposure opening for exposing the interface section. 3. The projector according to claim 1 , wherein the exterior case is provided with an inclined surface corresponding to the diagonally intersecting surface, and the exposure opening is provided in the inclined surface. A projector characterized by being installed. The projector according to any one of claims 4] claims 1 to 3, wherein the support is characterized in that it has an outer shape corresponding to the degree of narrowing of the beam projector.