JPH09146171A - Screen unit, screen and projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a screen which can be disassembled/assembled and expanded/contracted and where a joint viewed from an observation side is made inconspicuous by fitting the projected part of one screen unit in the recessed part of another screen unit so that it can be inserted/pulled out. SOLUTION: This screen unit 11 which is like a square plate is obtained by superposing a Fresnel lens and a lenticular lens. The projected part 11a projected in the board thickness direction of an end face is extended nearly over the entire length of two adjacent sides among four sides of the screen unit 11, and the recessed part 11b recessed in the board thickness direction of the end face is extended nearly over the entire length of other two sides opposed to the former two sides. Plural screen units 11 are assembled as a large screen by successively fitting the projected part 11a in the recessed part 11b. A frame body 12 is fit to the outermost periphery of the screen assembled in such a way so as to make the shape of the screen stable. The width and the positions in the board thickness direction of the end face are set almost equal respectively between the projected part 11a and the recessed part 11b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen unit that constitutes a screen, a large-screen screen formed by connecting a plurality of the screen units, and a projection device using the screen.

[0002]

2. Description of the Related Art A large screen screen may be made up of a single screen unit or may be made up by connecting relatively small screen units. Especially in the case of a transmissive screen, since the Fresnel lens and the lenticular lens that compose the screen are both molded using a mold, there is a limit to their size. Therefore, in terms of cost, a screen unit with a side of about 1 meter is used. It is considered appropriate to connect multiple sheets.

Conventionally, this screen unit is connected by bonding the end faces of the screen unit together, or, as shown in FIG. 6, connecting the screen units 61 side by side via a connecting member 62 having an E-shaped cross section. Was.

[0004]

However, according to such a conventional technique, in the case of bonding, the size of the screen is limited by the size of the entrance of the building or the size of the transportation vehicle, as in the case of the integral structure. There is a problem that the screen cannot be expanded or contracted according to the installation location of the screen, and when connecting with a connecting member with an E-shaped cross section,
Although it can be disassembled and assembled, since there are inclusions between the screen units at the connection part, the light distribution characteristics are discontinuous (especially in the transmissive screen) (there is a part where light is not distributed), and seams are noticeable depending on the viewing direction. There was a problem.

The present invention solves such a problem and provides a screen which can be disassembled / assembled or expanded / contracted and has no visible seam from the viewing side, and a projection device using such a screen. With the goal.

[0006]

To achieve this object, the present invention provides a screen in which a plurality of rectangular plate-shaped screen units are connected to each other, and at least one end face of each screen unit has a convex shape. Of the screen or a recessed portion having a concave shape that matches the projection extends, and a plurality of screens are formed by fitting the projection of one screen unit into the recess of another screen unit so that the projection can be inserted and removed. The screen is characterized by connecting units.

Further, according to the present invention, in a screen formed by connecting a plurality of rectangular plate-shaped screen units, a connecting member and a frame body are provided, and the connecting member has a plurality of projecting bodies. The screen unit has a hole in the peripheral portion that matches the protrusion, and the protrusion of the connecting member can be attached to and detached from both holes of the adjacent screen unit in a state where the end faces of the adjacent screen units are in contact with each other. The frame body is engaged with the plurality of connected screen units at the outermost peripheral portion thereof to support the screen unit.

Further, according to the present invention, in a screen formed by connecting a plurality of rectangular plate-shaped screen units, a connecting member, a pressing member and a frame body are provided, and the connecting member has a plurality of projecting bodies. However, the pressing member has a hole that matches the protrusion, the screen unit has a through hole through which the protrusion penetrates, and the end faces of the adjacent screen units are in contact with each other. The projecting body of the connecting member penetrates through the through holes of both of the adjacent screen units and detachably engages with the pressing member, and the frame body is different from the plurality of connected screen units. The screen is characterized in that it is engaged with and supported by the outer peripheral portion.

Further, the present invention has a plurality of projectors and a plurality of screen units corresponding to the plurality of projectors in a one-to-one correspondence, and the plurality of screen units are connected to form any one of the above screens. The projection device is characterized in that

As described above, since each of the plurality of screen units is connected in a disassembleable manner, the screen can be disassembled / assembled or enlarged / reduced. Further, the end faces of the screen unit are substantially in contact with each other at the connecting portion of the screen unit, and when the connecting member is used, since it is mainly made of a transparent material, the joint is not so conspicuous.

[0011]

DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to FIGS. First embodiment. FIG. 1 is an explanatory diagram of the first embodiment of the present invention, and illustrates a large transmissive screen in which nine screen units are connected in three rows and three columns. Figure (A)
Is a front view, and (B) is a cross-sectional view taken along line XX in (A).

The screen unit 11 is in the shape of a rectangular plate, and is a combination of a Fresnel lens and a lenticular lens. Adjacent two sides of the four sides of the screen unit 11 each have a convex portion 11a having a convex shape extending in the plate thickness direction of the end face over substantially the entire length, and the other two sides facing each other extend over the entire length. A concave portion 11b having a concave shape extends in the plate thickness direction of the end surface.

A plurality of the screen units 11 are assembled into a large screen by successively fitting the convex portions 11a and the concave portions 11b. A frame 12 is fitted on the outermost periphery of the assembled screen to stabilize the shape. In addition, this convex portion 1
If the width and the position of the end face plate thickness direction of 1a and the recessed portion 11b are made substantially equal to each other, an intermediate fit (fitting with no gap and insertion / removal possible) at the time of fitting and at the same time, of both connected screen units 11 will be performed. There is no step on the surface that causes display disorder.

In the above example, all screen units 1
One of the convex portion 11a and the concave portion 11b is provided on the four end faces of No. 1, but the end face that is the outermost periphery when assembled on the screen is not necessarily the convex portion 11a and the concave portion 11b.
Do not need. Therefore, the two screen units 1
When the screen is configured by 1, if one end face has the convex portion 11a and the other end face has the concave portion 11b, the other end face may have neither the convex portion 11a nor the concave portion 11b.

Second embodiment. FIG. 2 is an explanatory diagram of the second embodiment of the present invention, and illustrates a large transmissive screen in which nine screen units are connected in three rows and three columns, as in the first embodiment. 9A is a perspective view, FIG. 9B is a sectional view taken along line XX in FIG. 9A, and FIG.

The feature of this embodiment is that the connecting member 23 is used. The connecting member 23 is a strip plate made of a transparent material (for example, acrylic resin) provided with two rows of protrusions 23a in the longitudinal direction on one surface thereof, and the protrusions 23a are straight pins, taper pins, screws and the like. The screen unit 21 does not have the convex portions 11a and the concave portions 11b as in the screen unit 11 described above, but instead has a row of holes 21a in the peripheral portion. The holes 21a are straight holes, taper holes, screw holes, etc. that are fitted or screwed into the straight pins, taper pins, screws and the like. These holes 21
It is desirable that a is a blind hole opened from the side on which the projection light is projected.

A plurality of the screen units 21 are arranged so that end faces of adjacent ones come into contact with each other, and the connecting member 2
The three projections 23a are connected to each other by fitting or screwing into both holes 21a of the adjacent screen units 21, and assembled into a large screen. Although it is desirable that the end faces of the adjacent screen units 21 are in close contact with each other, if a slight cap is produced, grease-like transparent resin may be filled.

A frame 22 is fitted to the outermost periphery of the assembled screen to stabilize the shape, and the connecting member 2
The both ends of 3 are fitted into the frame body 22, and the connecting member 23
Are prevented from falling off the screen unit 21.
The surface of the connecting member 23 is inclined so as to be substantially orthogonal to the projected light so that the reflected light does not disturb the image such as ghost.

Although the connecting member 23 connects the left and right screen units 21 in this example, the upper and lower screen units 21 may be connected, or the left and right screen units 21 may be connected. May be.

Third embodiment. 3A and 3B are explanatory views of a third embodiment of the present invention. FIG. 3A is a sectional view corresponding to FIG. 2B in the second embodiment, and FIG. 3B is an enlarged sectional view of a connecting portion. Is.

The feature of this embodiment is that a pressing member 34 is used in addition to the connecting member 33. This connecting member 3
Reference numeral 3 is equivalent to the above-mentioned connecting member 23, and two rows of projecting bodies 33a (straight pins, taper pins, screws, etc.) are provided in the longitudinal direction on one surface of a strip plate made of a transparent material (for example, acrylic resin). The pressing member 34 is provided with two rows of holes 34a in the longitudinal direction on one surface of a strip plate made of a transparent material (for example, acrylic resin). The hole 34a is a straight pin, a taper pin, a straight hole that fits or is screwed with a screw or the like of the protrusion 33a, a taper hole, a screw hole, or the like. It is desirable that these holes 34a are blind holes opened from the side on which the projection light is projected. The screen unit 31 is provided with a row of through holes 31a in the peripheral portion.

A plurality of the screen units 31 are arranged so that the end faces of adjacent ones come into contact with each other, and the projecting body 33a of the connecting member 33 is passed through both through holes 31a of the adjacent screen units 31 from the light projecting side and viewed. The holes are formed by fitting or screwing into the holes 34a of the pressing member 34 disposed on the side to assemble the large screen. A frame 32 is fitted on the outermost periphery of the assembled screen to stabilize the shape. It is desirable to fit both or both ends of the connecting member 33 and the pressing member 34 into the frame 32.

Fourth embodiment. FIG. 4 is an explanatory diagram of a fourth embodiment of the present invention, which shows a transmission type projection device including a large screen in which a plurality of projectors and a plurality of screen units for individually receiving images projected by the respective projectors are connected. Shows. The same figure (A) is a longitudinal sectional view, (B)
Is a cross-sectional view, and (C) is an enlarged cross-sectional view of the connecting portion.

In this example, the screen units 41 are connected in three rows and three columns and attached to the housing 42, and one screen unit 41 corresponds to one projector 45. The projector 45 (for example, a liquid crystal projector) includes a projection lens, and the projection light is sequentially reflected by the small mirror 46 and the large mirror 47 and reaches the corresponding screen unit 45. Each projector 45 can project an independent image on the corresponding screen unit 41, and at the same time, the plurality of projectors 4
It is also possible to project one image on the plurality of screen units 41 by using 5.

Reference numerals 43 and 44 respectively represent a crosspiece member and a partition member which form a part of the housing 42, and these have a function corresponding to the connecting member 23 in the second embodiment, and both have end portions. Have pins 43a or 44a implanted in two rows. The pin 43a of the cross member 43 connects the upper and lower two screen units 41, and the pin 44a of the partition member 44 connects the left and right two screen units 41, respectively. However, since the crosspiece member 43 and the partition member 44 are both made of opaque metal, these main bodies are slightly separated from the screen unit 41 so as not to block the projection optical path as much as possible.
The pins 43a and 44a are lengthened accordingly.

Fifth embodiment. FIG. 5 is an explanatory diagram of a fifth embodiment of the present invention, which is a main part of a transmissive projection device including a large screen in which a plurality of projectors and a plurality of screen units for individually receiving images projected by the respective projectors are connected. Parts are shown. FIG. 6A is an enlarged sectional view of the vertical connecting portion, and FIG. 7B is an enlarged sectional view of the horizontal connecting portion.

The difference between this embodiment and the fourth embodiment is that no pins are planted in the cross member 53 and the partition member 54, and a connecting member equivalent to the connecting member 23 in the second embodiment is separately provided. 55 or a connecting member 56 and a pressing member 57 that are equivalent to the connecting member 33 and the pressing member 34 in the third embodiment. That is, the connecting members 55, 5
6 and the pressing member 57 are both made of a transparent material, and the connecting members 55 and 56 have two rows of pins 55a and 56a, respectively. The pins 55a and 56a are provided on both of the two screen units 51. insert. Connecting member 5
The side surfaces of reference numerals 5 and 56 are inclined so as to be substantially parallel to the projected light rays, so that the projected light rays are reflected so that image disturbance such as ghost does not occur. In addition, the connection method of FIG.
Although it is possible to obtain greater strength than the connection method of FIG. However, since the screen generally has a wide viewing angle in the left-right direction and a narrow viewing angle in the up-down direction, it is preferable to adopt the method (B) for connecting the left and right screen units and the method (A) for connecting the upper and lower screen units.

The present invention is not limited to the above embodiment and can be carried out in various modified forms. For example, the present invention can be applied to a screen in which the two methods of the first, second, and third embodiments are mixed and connected, or to a projection device including such a screen. It is valid.

[0029]

As described above, according to the present invention,
It is possible to provide a screen that can be disassembled / assembled or expanded / contracted, and that has no visible seam from the viewing side, and a projection device using such a screen.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a second embodiment of the present invention.

FIG. 3 is an explanatory diagram of a third embodiment of the present invention.

FIG. 4 is an explanatory diagram of a fourth embodiment of the present invention.

FIG. 5 is an explanatory diagram of a fifth embodiment of the present invention.

FIG. 6 is a sectional view showing a main part of a conventional example.

[Explanation of symbols]

11, 21, 31, 41, 51, 61 Screen unit 11a Convex portion 11b Recessed portion 12, 22, 32 Frame body 21a, 34a Hole 23, 33, 55, 56, 62 Connecting member 23a, 33a Projected body 31a Through hole 34 Presser Member 42 Housing 43, 53 Crosspiece member 44, 54 Partition member 55a, 56a Pin 57 Holding member

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Keiji Hayashi, 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Tetsuya Hamada, 1015, Kamedotachu, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited ( 72) Inventor Hisashi Yamaguchi 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited

Claims (9)

[Claims] 1. A screen unit which is in the form of a rectangular plate and is formed by connecting a plurality of screens to each other, wherein the screen unit has at least one end face having a convex shape or a concave shape. The screen unit, wherein the concave portion extends, and the convex portion or the concave portion is fitted with the concave portion or the convex portion of another screen unit. 2. A screen unit having a rectangular plate shape and a plurality of screens being connected to each other to form one screen, wherein the screen unit has a hole at a peripheral edge thereof, and A screen unit that is connected by fitting in a hole. 3. A screen comprising a plurality of rectangular plate-shaped screen units connected to each other, wherein at least one end face of each screen unit has a convex convex portion or a concave concave portion matching the convex portion. And a plurality of screen units are connected by fitting the convex portion of one screen unit into the concave portion of another screen unit so as to be able to be inserted and removed. 4. A screen in which a plurality of rectangular plate-shaped screen units are connected to each other, wherein the screen has a connecting member and a frame body, the connecting member has a plurality of projecting bodies, and the screen unit has a peripheral edge. Has a hole matching the protrusion, and the protrusion of the connecting member detachably engages with both holes of the adjacent screen unit in a state where the end faces of the adjacent screen units are in contact with each other. The screen is characterized in that the frame body engages with and supports the plurality of connected screen units at their outermost peripheral portions. 5. The screen according to claim 2, wherein at least a portion of the connecting member which is in contact with the projection optical path is made of a transparent material. 6. A screen comprising a plurality of rectangular plate-shaped screen units connected to each other, comprising a connecting member, a pressing member and a frame body, wherein the connecting member has a plurality of projecting bodies, The member has a hole that matches the projecting body, the screen unit has a through hole through which the projecting body penetrates in the peripheral portion, and the connecting member of the connecting member is brought into contact with the end faces of the adjacent screen units. The protruding body penetrates through both through holes of the adjacent screen units and is detachably engaged with the pressing member, and the frame body is engaged with the plurality of connected screen units at the outermost peripheral portion thereof. A screen characterized by the fact that they collectively support it. 7. The screen according to claim 4, wherein at least portions of the connecting member and the pressing member that are in contact with the projection optical path are made of a transparent material. 8. The screen according to claim 2, wherein at least one of the connecting member and the pressing member engages with the frame body at both ends thereof. 9. A projection apparatus comprising the screen according to claim 1, 2 or 4, wherein one projector corresponds to each of a plurality of screen units constituting the screen.