WO2020003871A1

WO2020003871A1 - Projection device and air discharging method therefor

Info

Publication number: WO2020003871A1
Application number: PCT/JP2019/021373
Authority: WO
Inventors: 宏信茅野
Original assignee: 富士フイルム株式会社
Priority date: 2018-06-25
Filing date: 2019-05-29
Publication date: 2020-01-02
Also published as: JPWO2020003871A1; JP6811358B2

Abstract

Provided are: a projection device in which, while an image can be projected in a plurality of directions, occurrence of fluctuation of the projected image due to discharge of hot air can be prevented; and an air discharging method therefor. A projector (100) is provided with: a body part (1) having a light source installed therein; and an optical unit (6) including outer peripheral members (first member (2), second member 3) having hollow portions (2A, 3A) which are connected to the inside of the body part (1), a projection optical system (first unit (20), second unit 30) which is for projecting incident light from the body part (1) to a projection surface and which is disposed in the hollow portions (2A, 3A), a rotary mechanism (4) for changing a projection direction X2 of the light from the projection optical system to a plurality of directions by rotating the second member (3), and an air discharging port (3H) which is formed in the second member (3). The air discharging port (3H) is formed in a surface (3D), of the second member (3) which is a part to be rotated, oriented to a direction opposite to the projection direction X2.

Description

Projection apparatus and exhaust method thereof

The present invention relates to a projection device and an exhaust method thereof.

A projection device such as a liquid crystal projector includes a light source, a light modulation element that spatially modulates light from the light source, a projection optical system that projects light obtained by modulation by the light modulation element, and a housing that houses these. And an exhaust port for discharging air inside the housing to the outside of the housing.

Patent Document 1 describes a projection device that discharges air inside a housing from around a lens device provided in the housing.

Patent Documents

2 and 3 disclose a projector in which an exhaust port is provided on a side surface of a housing that is adjacent to a side surface on which an optical system is exposed and that is perpendicular to the side surface.

In Patent Literature 4, an exhaust port is provided on a side surface of a housing where an optical system is exposed and an opposite surface of the side surface, and an exhaust direction of air in the housing is switched between an image projection side and an opposite side. A projection device that can be used is described.

Patent Document 5 describes a projection device that can change the projection direction of an image by 180 °.

JP 2013-120249 A JP 2001-051349 A JP-A-2011-203596 Japanese Patent Application Laid-Open No. 2010-271579 Japanese Patent Application Laid-Open No. 2012-098506

As described in Patent Document 1, when the air is exhausted in a direction close to the projection direction of the image, the image projected on the screen fluctuates like a flame due to the exhausted air. Therefore, as described in Patent Literature 2 and Patent Literature 3, it is effective to perform exhaust so that the angle between the image projection direction and the exhaust direction is 90 ° or more.

However, assuming a projection device that can greatly change the image projection direction as described in Patent Literature 5, regardless of the projection direction of the image, the projection It is necessary to provide the exhaust port so that the angle formed is 90 ° or more, which makes the design of the device difficult.

Patent Document 4 discloses a configuration in which the exhaust direction can be changed by 180 °, but the projection direction of the image is fixed and not variable.

The present invention has been made in view of the above circumstances, and provides a projection apparatus and an exhaust method capable of projecting an image in a plurality of directions while preventing fluctuation of a projected image due to exhaustion of warm air. The purpose is to do.

The projection device of the present invention is a projection device that spatially modulates light from a light source and projects the light onto a projection surface, and includes a main body that incorporates the light source, and an outer peripheral member that has a hollow portion connected to the inside of the main body. A projection optical system disposed in the hollow portion for projecting light incident from the main body portion onto the projection surface, and projecting light from the projection optical system by rotating at least a part of the outer peripheral member. An optical system comprising: a rotating mechanism for changing a direction to a plurality of directions; and an exhaust port for discharging air inside the main body formed in a rotated portion of the outer peripheral member rotatable by the rotating mechanism. And a unit, wherein the exhaust port is formed on a surface of the rotated portion that faces in a direction opposite to the projection direction.

The exhaust method of the projection device according to the aspect of the invention may further include a main body having a light source therein, an outer peripheral member having a hollow portion connected to the inside of the main body, and the hollow for projecting light incident from the main body onto a projection surface. A projection optical system disposed in the section, and an optical unit including a rotation mechanism for rotating at least a part of the outer peripheral member to change a projection direction of light from the projection optical system to a plurality of directions. A method of exhausting a projection apparatus that spatially modulates light from the light source and projects the light onto the projection surface, wherein a surface of a rotated portion of the outer peripheral member rotatable by the rotation mechanism faces in a direction opposite to the projection direction. Thus, the air inside the main body is discharged.

According to the present invention, it is possible to provide a projection apparatus and an exhaust method capable of projecting an image in a plurality of directions while preventing fluctuation of a projected image due to exhaustion of warm air.

FIG. 1 is a schematic diagram illustrating an external configuration of a projector 100 which is an embodiment of a projection device of the present invention. FIG. 2 is a schematic diagram illustrating an example of an internal configuration of a light source unit 11 in FIG. 1. FIG. 2 is a schematic cross-sectional view of an optical unit 6 of the projector 100 shown in FIG. FIG. 4 is a schematic cross-sectional view of a modification of the optical unit 6 of the projector 100 shown in FIG. FIG. 3 is a schematic cross-sectional view of an optical unit 6A which is a modification of the optical unit 6 of the projector 100 shown in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram showing an external configuration of a projector 100 which is an embodiment of the projection device of the present invention. FIG. 2 is a schematic diagram illustrating an example of the internal configuration of the light source unit 11 of FIG. FIG. 3 is a schematic sectional view of the optical unit 6 of the projector 100 shown in FIG. FIG. 3 shows a cross section of a surface along the optical path of light emitted from the main body 1.

As shown in FIG. 1, the projector 100 includes a main body 1 and an optical unit 6 protruding from the main body 1.

The main body 1 has an opening 14a (see FIG. 3) for transmitting light at a portion connected to the optical unit 6, and a suction port 13 for taking in outside air into the interior at a position different from the opening 14a. It has a housing 14 (see FIG. 3) in which (see FIG. 1) is formed.

As shown in FIG. 1, a light source unit 11 and a light modulation unit 12 including a light modulation element that spatially modulates light emitted from the light source unit 11 based on image data are provided inside a housing 14 of the main body 1. And a fan (not shown) for applying air taken in from the air inlet 13 to a heat source including the light source unit 11 and the light modulation unit 12 to cool the heat source.

In the example shown in FIG. 2, the light source unit 11 includes an R light source 41r that is a red light source that emits red light, a G light source 41g that is a green light source that emits green light, and a B light source that is a blue light source that emits blue light. A light source 41b, a dichroic prism 43, a collimator lens 42r provided between the R light source 41r and the dichroic prism 43, a collimator lens 42g provided between the G light source 41g and the dichroic prism 43, and a dichroic with the B light source 41b. A collimator lens 42b provided between the prisms 43.

The dichroic prism 43 is an optical member for guiding light emitted from each of the R light source 41r, the G light source 41g, and the B light source 41b to the same optical path. That is, the dichroic prism 43 transmits the red light collimated by the collimator lens 42r and emits the red light to the light modulation element 12a of the light modulation unit 12. The dichroic prism 43 reflects the green light collimated by the collimator lens 42g and emits the green light to the light modulation element 12a of the light modulation unit 12. Further, the dichroic prism 43 reflects the blue light collimated by the collimator lens 42b and emits the blue light to the light modulation element 12a of the light modulation unit 12. The optical member having such a function is not limited to the dichroic prism. For example, a cross dichroic mirror may be used.

A light emitting element such as a laser or an LED (Light Emitting Diode) is used for each of the R light source 41r, the G light source 41g, and the B light source 41b. The number of light sources included in the light source unit 11 may be one, two, or four or more.

As the light modulation element 12a included in the light modulation unit 12, for example, a DMD (Digital Micromirror Device) is used in the configuration of the light source unit 11 in FIG. As the light modulation element 12a, an LCOS (Liquid Crystal On Silicon), a MEMS (Micro Electro Mechanical Systems) element, a liquid crystal display element, or the like can be used. The light spatially modulated by the light modulation unit 12 passes through the opening 14 a of the housing 14 and enters the optical unit 6.

As shown in FIG. 3, the optical unit 6 includes a first member 2 having a hollow portion 2A connected to the inside of the main body 1, a second member 3 having a hollow portion 3A connected to the hollow portion 2A, and a hollow portion 2A. The first unit 20 is disposed, the second unit 30 is disposed in the hollow portion 3A, and the rotating mechanism 4 is provided.

The first member 2 is a member that covers the first unit 20. The second member 3 is a member that covers the second unit 30. An outer peripheral member having

hollow portions

2A and 3A is constituted by the first member 2 and the second member 3.

{Circle around (1)} The first member 2 is a member having a rectangular cross-sectional shape, and the

openings

2a and 2b are formed on surfaces perpendicular to each other. The first member 2 is supported by the main body 1 in a state where the opening 2a is arranged at a position facing the opening 14a of the main body 1. Light emitted from the light modulation unit 12 of the main body 1 enters the hollow portion 2A of the first member 2 through the opening 14a and the opening 2a. The incident direction of light incident on the hollow portion 2A from the main body 1 is defined as a direction X1.

The first unit 20 disposed in the hollow portion 2A of the first member 2 includes a first reflecting member 22 that reflects light incident from the main body 1 in a direction Z that is a first direction perpendicular to the direction X1. , An optical system 21 including at least one lens disposed between the first reflection member 22 and the main body 1, and a housing (not shown) for housing the optical system 21.

The first reflection member 22 is constituted by, for example, a half mirror, a beam splitter, a polarizing member, or the like.

(4) Light that travels in the direction X1 from the main body 1 and enters the first member 2 passes through the optical system 21, is reflected by the first reflection member 22, and travels in the direction Z. In the first member 2, an opening 2b is formed on the optical path of the light reflected by the first reflecting member 22, and the reflected light passes through the opening 2b to the hollow portion 3A of the second member 3. And proceed.

The rotation mechanism 4 is a mechanism for rotatably connecting the second member 3 to the first member 2. By the rotation mechanism 4, the second member 3 is configured to be rotatable around a rotation axis parallel to the direction Z (specifically, an axis extending in the direction Z passing through the center of the opening 2b).

{Circle around (2)} The second member 3 is a member having a substantially L-shaped cross section, and an opening 3 a is formed at a position facing the opening 2 b of the first member 2. Light from the main body 1 passing through the opening 2b of the first member 2 is incident on the hollow portion 3A of the second member 3 through the opening 3a.

The second unit 30 arranged in the hollow portion 3A of the second member 3 transmits light (light passing through the first unit 20) incident from the first member 2 in a direction that is a second direction perpendicular to the direction Z. X2, a second reflecting member 32, an optical system 31 including at least one lens disposed between the second reflecting member 32 and the first member 2, and reflected by the second reflecting member 32 A lens 34 arranged in a light traveling direction, and light emitted from the lens 34 is projected on a projection surface; and an optical system 33 including at least one lens arranged between the lens 34 and the second reflection member 32. And a housing (not shown) for accommodating them. Note that the optical system 33 is not essential and may be omitted.

The second reflecting member 32 is constituted by, for example, a half mirror, a beam splitter, a polarizing member, or the like.

The lens 34 is disposed so as to close the opening 3b formed in the second member 3, and a part of the lens 34 is exposed to the outside.

The light from the main body 1 that has entered the second unit 30 passes through the optical system 31, is reflected by the second reflecting member 32, travels in the direction X2, and then passes through the optical system 33 and passes through the lens 34. Is projected toward the projection plane.

Thus, the first unit 20 and the second unit 30 constitute a projection optical system for projecting the light incident from the main body 1 onto the projection surface. The lens 34 is a lens disposed at a position closest to the projection plane in the projection optical system.

In the optical unit 6, the second member 3 is configured to be rotatable with respect to the first member 2. Therefore, when the second member 3 is at the rotational position shown in FIG. 3, the projection direction (direction X2) of the light projected from the lens 34 is opposite to the direction X1. When the second member 3 is at a position rotated by 90 degrees with respect to the state of FIG. 3, for example, the projection direction (direction X2) of the light projected from the lens 34 is a direction perpendicular to the direction X1 (the direction of FIG. 3). (Front or back of the paper). When the second member 3 is at a position rotated by 180 degrees with respect to the state of FIG. 3, for example, the projection direction (direction X2) of the light projected from the lens 34 is the same as the direction X1.

As described above, the projector 100 causes the rotation mechanism 4 to rotate the second member 3 which is a part of the outer peripheral member, so that the projection direction of light from the projection optical system can be changed in a plurality of directions (in the above example, four directions). ). The second member 3 constitutes a rotated portion of the outer peripheral member rotatable by the rotation mechanism 4.

In the second member 3, air inside the main body 1 (specifically, the light source unit 11 and the light modulation unit by a fan) An exhaust port 3H for discharging hot air obtained by cooling a heat source including the heat source 12 and the like is formed. The direction opposite to the projection direction of the light from the lens 34 refers to a direction in which the angle with the projection direction (direction X2) exceeds 90 degrees in FIG.

The surface 3D of the second member 3 is constituted by an inclined surface 3B inclined toward the lens 34 side (projection direction) with respect to the surface perpendicular to the direction X2 and a surface 3C perpendicular to the direction X2. ing.

The inclined surface 3B is located on the back surface of the second reflecting member 32 and is a surface parallel to the light reflecting surface of the second reflecting member 32. An exhaust port 3H is formed on the inclined surface 3B.

The operation of exhausting the air inside the main body 1 in the projector 100 configured as described above will be described. Hot air, which is warm air obtained by cooling the light source unit 11 and the light modulation unit 12 by the fan inside the main body 1, flows through the opening 14 a of the housing 14 of the main body 1 through the hollow portion 2 </ b> A of the first member 2. , Flows into the hollow portion 3A of the second member 3 and is discharged from the exhaust port 3H.

In the projector 100, the exhaust port 3H is in a state opposite to the projection direction (X2) regardless of the rotational position of the second member 3. For this reason, in any projection direction, it is possible to prevent the warm air from being discharged in a direction close to the projection direction (a direction formed by the projection direction at an angle of 90 degrees or less) and to cause fluctuations in the projection image. Can be prevented.

According to the projector 100, when the warm air inside the main body 1 goes from the first member 2 to the second member 3, the warm air goes in a direction opposite to the vertical direction. According to this configuration, the warm air easily rises, so that the warm air can be efficiently exhausted from the exhaust port 3H, and the exhaust performance can be improved.

In projector 100, exhaust port 3H is formed on inclined surface 3B. Since the inclined surface 3B exists so as to intersect with the rising path of the warm air, the warm air can be efficiently discharged, and the exhaust performance can be improved.

In the optical unit 6 of the projector 100, all of the surfaces 3D may be surfaces perpendicular to the direction X2. Even in this case, since the exhaust port 3H is formed on the vertical surface, the warm air can be discharged in the direction opposite to the projection direction. By making the surface 3D have the inclined surface 3B as shown in FIG. 3, the size of the optical unit 6 can be reduced.

In addition, in the optical unit 6 of the projector 100, an exhaust port 3H may be formed on the surface 3C as shown in FIG. Also in the configuration of FIG. 4, it is possible to discharge warm air in a direction opposite to the projection direction. According to the configuration of FIG. 4, the exhaust can be performed in a direction different from the projection direction by 180 degrees, and the fluctuation of the projection image can be more reliably prevented.

The optical unit 6 of the projector 100 bends the light from the main body 1 twice before projecting it on the projection surface. However, the optical unit 6 bends the light from the main body 1 once and projects it on the projection surface. You may do it.

FIG. 5 is a schematic cross-sectional view of an optical unit 6A which is a modification of the optical unit 6 of the projector 100 shown in FIG. The optical unit 6A shown in FIG. 5 has the same configuration as the optical unit 6 except that the first member 2 is omitted and the second member 3 is rotatably connected to the main body 1 by the rotating mechanism 4. It is.

The second member 3 of the optical unit 6A is configured to be rotatable by the rotation mechanism 4 around a rotation axis parallel to a direction Z which is an incident direction of light incident from the main body 1. That is, the optical unit 6A has a configuration in which the projection direction can be changed to a plurality of directions by rotating the entire outer peripheral member. Even in the projector 100 having the optical unit 6A, since the warm air is discharged in the direction opposite to the projection direction, the fluctuation of the projected image can be prevented. In the optical unit 6A, the direction Z is the incident direction of light from the main body 1, the direction X2 is the first direction, and the second reflecting member 32 functions as a first reflecting member.

In the projector 100 including the optical unit 6A as shown in FIG. 5, the optical unit 6A does not need to protrude from the main body 1. For example, a configuration in which a concave portion is formed in the housing 14 of the main body 1 and the optical unit 6A is disposed in the concave portion may be employed. According to the configuration in which the

optical units

6 and 6A protrude from the main body 1 as shown in FIG. 1 or FIG. 5, the design of the projector 100 becomes easy and the manufacturing cost can be reduced.

よう As described above, the following items are disclosed in this specification.

(1)
A projection device that spatially modulates light from a light source and projects the light on a projection surface,
A main body part incorporating the light source,
An outer peripheral member having a hollow portion connected to the inside of the main body portion; a projection optical system arranged in the hollow portion for projecting light incident from the main body portion on the projection surface; and at least one of the outer peripheral member. A rotation mechanism for rotating a part to change a projection direction of light from the projection optical system into a plurality of directions, and an inside of the main body formed on a rotated portion of the outer peripheral member rotatable by the rotation mechanism An exhaust unit for exhausting air, and an optical unit having
The projection device, wherein the exhaust port is formed on a surface of the rotated portion facing in a direction opposite to the projection direction.

(2)
(1) The projection device according to (1),
The projection optical system, the light incident from the main body, the first unit including a first reflecting member that reflects in a first direction perpendicular to the incident direction of the light, and passed through the first unit A second reflecting member that reflects light in a second direction perpendicular to the first direction, and a lens closest to the projection surface disposed in a traveling direction of the light reflected by the second reflecting member. And a second unit,
The outer peripheral member is configured by a first member that covers the first unit, and a second member that covers the second unit,
The second member and the second unit are configured to be rotatable around a rotation axis parallel to the first direction by the rotation mechanism,
The projection device, wherein the exhaust port is formed in the second member.

(3)
(2) The projection device according to (2),
The surface of the second member facing in the opposite direction includes an inclined surface inclined toward the lens with respect to a surface perpendicular to the projection direction, and the projection in which the exhaust port is formed on the inclined surface. apparatus.

(4)
(3) The projection device according to (3),
The projection device, wherein the inclined surface is on a back surface of the second reflecting member and is parallel to a light reflecting surface of the second reflecting member.

(5)
(1) The projection device according to (1),
The projection optical system is a first reflection member that reflects light incident from the main body in a first direction perpendicular to the incident direction of the light, and a light reflected by the first reflection member. A lens located closest to the projection plane arranged in the traveling direction,
The outer peripheral member and the projection optical system are configured to be rotatable around a rotation axis parallel to the incident direction by the rotation mechanism,
The projection device, wherein the exhaust port is formed on a back surface of the first reflecting member.

(6)
The projection device according to any one of (1) to (5),
A projection device, wherein the optical unit is provided so as to protrude from the main body.

(7)
The projection device according to any one of (1) to (6),
A fan for cooling a heat source including the light source included in the main body is provided in the main body,
The projection device, wherein the exhaust port discharges air obtained by cooling the heat source by the fan.

(8)
A main body portion incorporating a light source, an outer peripheral member having a hollow portion connected to the inside of the main body portion, a projection optical system arranged in the hollow portion for projecting light incident from the main body portion onto a projection surface, and An optical unit including a rotation mechanism for rotating at least a part of the outer peripheral member to change a projection direction of light from the projection optical system into a plurality of directions, and spatially modulates light from the light source. Exhaust method of the projection device for projecting on the projection surface,
An exhaust method for a projection device, wherein air inside the main body is exhausted from a surface of a rotated portion of the outer peripheral member rotatable by the rotation mechanism, the surface facing a direction opposite to the projection direction.

Although various embodiments have been described with reference to the drawings, it is needless to say that the present invention is not limited to such examples. It is clear that those skilled in the art can conceive various changes or modifications within the scope of the claims, and these naturally belong to the technical scope of the present invention. I understand. Further, each component in the above embodiment may be arbitrarily combined without departing from the spirit of the invention.

This application is based on a Japanese patent application filed on June 25, 2018 (Japanese Patent Application No. 2018-120197), the contents of which are incorporated herein by reference.

The present invention is highly convenient and effective when applied to a projector or the like.

REFERENCE SIGNS LIST 100 projector 1 main body 2

first member

2 a, 2 b opening 2 A hollow portion 20 first unit 21 optical system 22 first reflecting member 3

second member

3 a, 2 b opening 3 B inclined

surface

3 C, 3 D surface 3 H exhaust port 3 A hollow portion Reference Signs List 30

second unit

31, 33 optical system 32 second reflecting member 34 lens 4

rotating mechanism

6, 6A optical unit 11 light source unit 41r R light source 41g G light source 41b

B light sources

42r, 42g, 42b collimator lens 43 dichroic prism 12 light modulation Unit 12a Light modulation element 13 Inlet 14 Housing 14a Opening

Claims

A projection device that spatially modulates light from a light source and projects the light on a projection surface,
A main body section containing the light source,
An outer peripheral member having a hollow portion connected to the inside of the main body portion; a projection optical system arranged in the hollow portion for projecting light incident from the main body portion on the projection surface; and at least one of the outer peripheral member. A rotation mechanism for rotating a part to change a projection direction of light from the projection optical system into a plurality of directions, and an inside of the main body formed on a rotated part of the outer peripheral member rotatable by the rotation mechanism. An exhaust unit for exhausting air, and an optical unit having
The projection device, wherein the exhaust port is formed on a surface of the rotated portion facing in a direction opposite to the projection direction.
The projection device according to claim 1,
The projection optical system, the light incident from the main body, the first unit including a first reflecting member that reflects in a first direction perpendicular to the incident direction of the light, passed through the first unit A second reflecting member that reflects light in a second direction perpendicular to the first direction, and a lens closest to the projection surface disposed in a traveling direction of the light reflected by the second reflecting member. And a second unit,
The outer peripheral member is configured by a first member that covers the first unit, and a second member that covers the second unit,
The second member and the second unit are configured to be rotatable around a rotation axis parallel to the first direction by the rotation mechanism,
The projection device, wherein the exhaust port is formed in the second member.
The projection device according to claim 2,
The surface of the second member facing in the opposite direction includes an inclined surface inclined toward the lens with respect to a surface perpendicular to the projection direction, and the projection in which the exhaust port is formed on the inclined surface. apparatus.
The projection device according to claim 3, wherein
The projection device, wherein the inclined surface is on a back surface of the second reflection member and is parallel to a light reflection surface of the second reflection member.
The projection device according to claim 1,
The projection optical system is a first reflection member that reflects the light incident from the main body in a first direction perpendicular to the incident direction of the light, and a light reflected by the first reflection member. A lens located closest to the projection plane arranged in the traveling direction,
The outer peripheral member and the projection optical system are configured to be rotatable around a rotation axis parallel to the incident direction by the rotation mechanism,
The projection device, wherein the exhaust port is formed on a back surface of the first reflection member.
The projection device according to claim 1, wherein:
The projection device, wherein the optical unit is provided so as to protrude from the main body.
The projection device according to claim 1, wherein:
A fan for cooling a heat source including the light source included in the main body is provided in the main body,
The projection device discharges air obtained by cooling the heat source by the fan.
A main body portion incorporating a light source, an outer peripheral member having a hollow portion connected to the inside of the main body portion, a projection optical system arranged in the hollow portion for projecting light incident from the main body portion onto a projection surface, and An optical unit including a rotation mechanism for rotating at least a part of the outer peripheral member to change a projection direction of light from the projection optical system into a plurality of directions, and spatially modulates light from the light source. Exhaust method of the projection apparatus for projecting on the projection surface,
An exhaust method for a projection device, wherein air inside the main body is exhausted from a surface of a rotated portion of the outer peripheral member rotatable by the rotation mechanism, the surface facing a direction opposite to the projection direction.