JP2005316296A - Screen module, large-sized screen, and manufacturing method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To properly set a gap between adjacent screen modules, by tying a plurality of the screen modules while tiling with members to manufacture a large-sized screen. <P>SOLUTION: The screen module body is manufactured, by bonding a plastic angle pipe frame 12 on the four sides of a rear face side outer edge part of a rectangular optical sheet 11. The screen module 10 is composed, by combining the module body and the tiling member 13. The frames are tied with the tiling member 13 to make the large-sized screen, in a state in which a proper gap is held between the frames of the adjacent screen modules. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a screen module, a large screen (a large screen for projection) and a manufacturing method thereof, and more particularly to a connection structure (tiling structure) between screen modules for forming a large selective reflection screen. is there.

  Conventionally, for example, a selective reflection type screen is known as a large projection screen (see, for example, Patent Document 1). The image projected on the selective reflection screen is less affected by outside light, fluorescent light, indirect illumination light, or the like. Therefore, this screen has an advantage that a screen image with high contrast can be obtained even in a bright room.

  Since it is technically difficult to produce a large projection screen with a single large sheet, a method for connecting a plurality of small screens to each other has been conventionally used as a method for constructing a large screen. It was.

  Methods for connecting small screens are roughly divided into a method of mechanically connecting and fixing with a connecting member having an appropriate structure and a method of connecting by bonding. However, the mechanical connection method does not require accuracy and has certainty as compared with the connection method by bonding, but has a drawback that it requires joints for connection and is obstructive. On the contrary, the connection method by bonding has an advantage that the joint width can be made almost zero, but the processing accuracy of the bonding surface and the bonding technique are required to be very high.

  As prior art relating to a large screen, there are those disclosed in the following Patent Documents 2 to 4. The invention disclosed in Patent Document 2 relates to a structure, a manufacturing method, and the like of a large optical sheet for a large screen manufactured by bonding a plurality of optical sheets having the same optical pattern.

  In this large-sized optical sheet, in the large-sized optical sheet bonded with an adhesive in a state where each end surface (cut surface) of a plurality of optical sheets having the same optical pattern is abutted, the adhesive is a corner portion of the end surface of the optical sheet. Covering. Further, the method for producing the large optical sheet includes a step of positioning the optical sheet while observing the end face of the optical sheet so that the end faces of the plurality of optical sheets having the same optical pattern abut each other, and a photocurable adhesive Includes a step of applying the adhesive so as to cover a corner of the end face of the optical sheet, and a step of irradiating the adhesive with light and then curing the adhesive after abutting the optical sheet.

  The invention described in Patent Document 3 is a method of manufacturing a large-area rear projection screen by connecting a plurality of screens, and a buffer material that is dissolved or softened by a solvent is sandwiched between connecting end surfaces of the plurality of screens. In addition, a solvent-based adhesive is injected into the buffer material, and pressure is applied to the buffer material so that the connecting end faces of the screen are in close contact with each other.

  In the invention described in Patent Document 4, the surface of the synthetic resin plate has an uneven shape, or when the resin plates having surfaces that have been subjected to secondary processing such as printing or painting are butt-bonded to each other, the adhesive portion is not affected. It relates to a method for making the adhesive line difficult to see, and is characterized by injecting a photo-curing polymerizable adhesive containing a raw material monomer constituting the adherent substrate resin plate into the butt-bonded portion and curing it by irradiating with ultraviolet rays. Yes.

  By the way, in the production of the selective reflection screen, a screen made of an optical sheet in which a selective reflection film is formed on a surface of a base material such as a PET base film by a coating method (for example, dip coating method) or a vacuum deposition method. Since it is manufactured using a module, its size is limited, and a large screen of 100 inch size or more is a plurality of screen modules prepared in advance (the size of the screen module is, for example, 20 to 50 inches). Need to be manufactured by connecting them by some means.

  However, no excellent technology has been found so far for a technology for making a large screen by mechanically connecting and fixing a plurality of small screens, that is, screen modules to each other using connecting members. Moreover, since a large screen occupies a large area, conveyance is difficult.

  When manufacturing a selective reflection screen, a PET film is usually used as the base film. However, when a selective reflection film is formed on the surface of the PET base film, the quality of the selective reflection film is ensured. In order to achieve this, a film (or sheet) having a thickness of 80 to 180 μm is wound around a winding core, and the film is unwound from a raw roll. A step of winding the subsequent film around the core is employed. The reason why many plastic base films are used is that they are not only excellent in optical properties but also can be provided at a relatively low cost.

  However, in a winding roll in which a film product with a selective reflection film formed is wound around a core, since the film has a curl, when a large screen is manufactured by connecting a plurality of screen modules to each other, The technology has a problem in that defects such as curling, warping, and distortion are likely to occur on the large screen.

  Furthermore, in the conventional large screen manufacturing techniques described in Patent Documents 2 to 4, a plurality of screen modules are connected by bonding, so that the plurality of screen modules are installed at a large screen installation place (event hall, outdoor). To a playground, etc.) where it is assembled into a large screen. For this reason, it was difficult to assemble a high-precision large screen in a short time.

  Furthermore, when manufacturing a large screen with a plastic film such as a PET film on which a selective reflection film has been formed, the film is cut into a rectangular screen module with an appropriate aspect ratio and size with a blade. Regardless of the method or the vacuum deposition method, the cut end surface of the originally transparent film is whitened. In addition, when the cut end surfaces of the screen modules are bonded to each other, that is, when a large screen is formed by butt tiling, a butt tiling line (a straight butt portion: a gap portion between adjacent screen modules) during image projection ) Sometimes caused glare optical defects. In addition, since the whitened portion is different from the ground color of the screen surface even when the image is not projected, there is a problem that tiling lines are conspicuously emphasized and the screen appearance is not preferable.

JP 2003-270725 A JP 2002-296681 A JP 2002-296683 A JP 2003-3148 A

  The present invention has been made in view of the above circumstances of the prior art, and a first object thereof is to provide a screen module including a connecting member having an excellent function. The second object is to provide a large screen produced by connecting a plurality of screen modules by the connecting member. A third object is to provide a method of manufacturing a large screen by connecting a plurality of screen modules with the connecting member.

The invention according to claim 1 is the rear side outer edge portion of the rectangular optical sheet (screen body) (here, the back side is the surface on the side opposite to the front surface which receives and reflects the projection light). A screen module having a frame A (for example, a square pipe, an angle) having a plurality of module connecting members on at least one side of the screen module,
The connecting member is an inter-module gap adjusting member (hereinafter, referred to as “module A”) that can adjust a distance between the frame A and a frame B attached to one side of the outer edge of the back side of the optical sheet of the adjacent screen module. The screen module is characterized in that it has a gap adjusting member), can be connected to the frame B, and can be further separated (see FIGS. 1, 3, 8, etc.).
As a result, these screen modules can be connected to each other to form a large-sized projection screen having a desired size and aspect ratio (for example, a square or a rectangle (in a narrow sense)). Further, the gap between adjacent screen modules may be equal to or less than an interval that is inconspicuous at the viewing distance position. For example, if the screen has a size of 100 inches (aspect ratio: 4: 3), The distance may be less than or equal to an inconspicuous distance (about 30 μm) from a position 3 m away.

  According to a second aspect of the present invention, the frame A is formed with an insertion hole, and the connecting member has a screw rod having screw portions at both ends and one end inserted into the insertion hole, and screwed into the screw rod. A pair of gap adjustment nuts as the gap adjustment member, a first lock nut screwed to the screw rod to press and fix one gap adjustment nut to the frame A, and the other gap adjustment nut The screen module according to claim 1, comprising a second lock nut for press-fitting and fixing to the frame B (see FIGS. 6 and 7).

  According to a third aspect of the present invention, the screw rod is flattened into a circular cross section, and the frame A is inserted into the frame A as the insertion hole. The screen module according to claim 2, wherein the screen module is formed (see FIG. 6).

  In the invention according to claim 4, the frame A is formed with an insertion hole, and the connecting member is formed with a first female screw at one end and a second female screw at the other end. A clearance adjustment member comprising a turnbuckle and a turnbuckle rotation locknut that restrains rotation of the turnbuckle, a first fixing bolt that is inserted through the insertion hole and is screwed into a first female screw, and the fixing bolt A first lock nut for pressure-fixing to the frame A, a second fixing bolt screwed into the second female screw, and a second lock for pressure-fixing the fixing bolt to the frame B The screen module according to claim 1, further comprising a nut (see FIGS. 9, 11, and 14).

  The invention according to claim 5 is characterized in that the first and second lock nuts have conical tapered portions formed concentrically on one side in the axial direction. It is a screen module of description (refer FIG.7, FIG.9, FIG.11).

  According to a sixth aspect of the present invention, an insertion hole is formed in the frame A, and the connecting member includes a first joint bolt and a second joint bolt into which the joint bolt is screwed. The joint bolt is inserted into the gap adjusting member that adjusts the gap between the adjacent screen modules according to the screwing depth of the joint bolt with respect to the second joint bolt, and is locked to the first joint bolt. A fixing bolt; a lock nut for pressing and fixing the fixing bolt to the frame A; and a fixing nut for fixing the second joint bolt inserted into the frame B to the frame B. The screen module according to claim 1. (See FIGS. 17 and 18).

In the invention according to claim 7, an insertion hole is formed in the frame A,
The connecting member is
(1) A nut at the top, a concentric taper at the upper part, a screw part at the lower part, and a fixing bolt inserted through the insertion hole;
(2) a nut having a screw hole screwed into the screw portion of the fixing bolt at the top, and a lock nut having a centering taper portion concentrically at the lower half portion;
(3) A plurality of longitudinal slits are formed in the upper cylindrical portion, a circular hole is formed in the upper portion that is smaller in diameter than the upper cylindrical portion, and can be fitted into and removed from the column portion of the fixing bolt, and a centering taper portion in the middle A first joint bolt in which a male screw is formed in the lower part, and the circular hole, the centering taper part and the male screw are concentric with the upper cylindrical part,
(4) A plurality of longitudinal slits are formed in the upper cylindrical portion, a female screw having a smaller diameter than the upper cylindrical portion is formed in the upper portion, and a screw hole communicating with the female screw is formed in the upper portion side surface. A second joint bolt having a centering taper portion, a male screw formed on the lower portion, and the female screw, the centering taper portion and the male screw being concentric with the upper cylindrical portion;
(5) a lock screw screwed into the screw hole of the second joint bolt;
(6) a fixing nut that is screwed onto the male screw of the second joint bolt;
The male screw of the first joint bolt can be screwed into the female screw of the second joint bolt,
The gap adjusting member is composed of the first and second joint bolts and the lock screw, and the adjacent screen modules are adjacent to each other depending on the depth of the first joint bolt screwed into the second joint bolt. The screen module according to claim 1, wherein the gap is adjusted (see FIGS. 17 and 18).

  The invention according to claim 8 is characterized in that the frame A is a square pipe or angle made of a lightweight metal or plastic, and is attached to the back surface of the optical sheet by double-sided adhesive tape or adhesive application. The screen module according to claim 1.

  In the invention according to claim 9, the frame A is attached to the back surface of the optical sheet, the outer end surface being inward of the end surface of the optical sheet, and the distance between them being 20 mm or less. The screen module according to claim 1, wherein the screen module is a feature (see FIGS. 1 and 3).

  The invention according to claim 10 is characterized in that, when the adjacent screen modules are connected to each other, the gap adjusting member allows the end faces of the optical sheets of the screen modules to be in close contact with each other. A screen module according to claim 1 (see FIGS. 1, 3, 6, and 11).

The screen module according to claim 1, wherein an end surface of the optical sheet is colored by applying a colorant.
The invention according to claim 12 is the screen module according to claim 11, wherein the colorant has the same color as the front color of the optical sheet (see FIGS. 4 and 5). ).

  14. The invention according to claim 13, wherein the optical sheet is formed by laminating an optical sheet main body on a reinforcing resin plate via an adhesive sheet, and the reinforcing resin plate is adhered to the frame A. The screen module according to claim 1, wherein the screen module is provided (see FIG. 21).

The invention according to claim 14, wherein the optical sheet has high reflection characteristics with respect to light in a specific wavelength region, and has high transmission characteristics with respect to light in at least a visible wavelength region other than the specific wavelength region. The screen module according to claim 1, further comprising a reflective layer.
In the invention according to claim 15, the reflective layer includes an optical multilayer film in which a high refractive index layer and a low refractive index layer having a lower refractive index are alternately stacked, and the outermost layer has a high refractive index layer. The screen module according to claim 14.
Further, in the invention according to claim 16, the optical multilayer film is formed on both sides of the transparent support, and the number of both surfaces of the high refractive index layer and the low refractive index layer is 2 (2n + 1) layers (1 ≦ n ≦ The screen module according to claim 15, which is 3).
In the invention according to claim 17, the optical sheet is a screen module comprising a light absorption layer, a reflection layer according to claim 14, and a light diffusion layer sequentially provided.
Furthermore, in the invention according to claim 18, the specific wavelength region includes the three primary color wavelength regions of red, green, and blue (refer to FIG. 24 above). .

  The invention according to claim 19 is the screen module according to any one of claims 1 to 18, wherein a frame is provided on at least one side of the front side outer edge of the screen module (see FIG. 2). ).

The invention according to claim 20 is that an optical sheet of the screen module is formed by connecting the screen modules to each other by the connecting member when using a plurality of the screen modules according to any one of claims 1 to 19 to produce a large screen. Adjust the gap adjustment member so that the end faces are in close contact with each other to assemble a large screen with a predetermined structure and dimensions in advance, and then perform appropriate operations so that the distance between the screen modules adjusted by the assembly does not change due to external force Is applied to the gap adjusting member, and then the large screen is disassembled into a plurality of screen modules, which are transported to a construction site by appropriate means, and then restored to the previously assembled large screen by the connecting member. Is a method of manufacturing a large screen (for example, FIG. See 2 to FIG. 14). In other words, after assembling a large screen with a predetermined structure and dimensions in a predetermined place such as a factory while adjusting the distance between screen modules, the connecting members are separated and disassembled into screen modules. This is a method of assembling a large screen again without adjusting the spacing between modules.
The invention according to claim 21 is characterized in that each screen module is assigned a number indicating the order of assembly when the large screen assembly is completed, and the module screen is assembled in the order of the numbers when the large screen is restored. Item 20 is a method for producing a large screen according to Item 20 (see, for example, FIGS. 12, 13, and 21).

  In a twenty-second aspect of the invention, a plurality of the screen modules according to any one of the first to nineteenth aspects are used, and the frame A of the screen module is connected to the back surface of the optical sheet of the adjacent screen module via the connecting member. It is connected to a frame B attached to one side facing the frame A at the side outer edge, and by adjusting the gap adjusting member, the end faces of the optical sheets of these screen modules are substantially in close contact with each other, and the whole is configured as a quadrangle. This is a large screen (see FIGS. 2, 3, 10, 13, 15, 19, 21, 22, and 23).

  In the invention according to claim 23, the frame B is stuck in parallel with the end surface on the back surface of the optical sheet in a state where a part of the surface of the frame B in contact with the optical sheet protrudes from the end surface of the optical sheet to be attached. 23. The large screen according to claim 22, wherein an end surface of the optical sheet on the frame A side is supported by a surface protruding from an end surface of the optical sheet of the frame B (see FIG. 11). ).

In the screen module according to claim 1, the gap between the frames A and B, that is, the gap between the adjacent screen modules (the gap between the adjacent optical sheet end faces) is adjusted to an appropriate one by adjusting the gap adjusting member. Can assemble a large screen. According to such a large screen, a high quality projection image quality is ensured.
Also, a plurality of screen modules once connected to each other can be separated into individual screen modules before connection by separating the connection members, and the separated screen modules are connected again to reproduce a large screen. It is also possible.

  In the invention of claim 2, when a large screen is manufactured using a plurality of screen modules, one side of the pair of screw rods with gap adjusting nuts is adjacent to the insertion hole of the frame A, and the other side of the screw rod is adjacent. The gap between adjacent screen modules can be adjusted to an appropriate one by inserting each through the insertion hole of the frame B of the screen module and enlarging / reducing the gap between the pair of gap adjustment nuts. Also, by fixing the gap between the gap adjustment nuts, the gap accuracy between the screen modules can be easily reproduced at the installation site, and a screen with few optical defects can be provided.

  In the invention of claim 3, the clearance adjustment between the screen modules is performed by rotation of the clearance adjustment nut. In this case, since the screw rod does not rotate together, the clearance adjustment operation can be performed more easily and accurately. .

  According to the fourth aspect of the present invention, the interval between the first and second fixing bolts can be enlarged / reduced by forward / reverse rotation of the turnbuckle, so that the operation for adjusting the gap between the screen modules becomes extremely simple. Further, by fixing the distance between the first and second fixing bolts, the accuracy of the gap between the screen modules can be easily reproduced at the installation site, and a screen with few optical defects can be provided.

  In the invention according to claim 5, when assembling a large screen, adjacent screen modules are connected in a centered state by the conical taper portion, so the front surfaces of these screen modules (receive projection light). No step is generated between the side surfaces), and the alignment in the direction along the front surface of the screen module (that is, the direction along the vertical or horizontal direction of the screen module) is accurately performed. A large flat screen having a high flatness and an accurate square or rectangular shape can be easily produced.

  In the screen module according to the sixth and seventh aspects, by rotating the first joint bolt in an appropriate direction by an appropriate number of times, a screwing depth of the first joint bolt with respect to the second joint bolt can be reduced. Therefore, as a result of adjusting the total length of the first and second joint bolts, the gap between the adjacent screen modules can be easily set to an appropriate value. Further, by fixing the total length of the first and second joint bolts, the clearance accuracy between the screen modules can be easily reproduced at the installation site, and a screen with less optical defects can be provided.

  Further, in the screen module according to claim 7, the centering taper portion is pressed against the slit forming portion and the gap between the screen modules is adjusted while expanding the slit forming portion. Co-rotation of the lock nut and the second joint bolt is prevented, and a high centering state is obtained.

  In the invention according to claim 8, the structure of the screen module is simple and lightweight, and can be easily and inexpensively manufactured.

  In the invention according to claim 9, since the outer end face of the frame A is located inside the end face of the optical sheet, the gap between the adjacent screen modules is substantially adhered by operating the gap adjusting member of the connecting member. It becomes possible to match the state (state in which the gap interval is almost zero). In addition, since the width of the portion of the optical sheet that protrudes outside the frame is in the above range, even if the optical sheet is weak, the amount of bending of the portion is small. Adjustment operations can be performed simply and accurately.

  In the invention according to claim 10, since the gap between adjacent screen modules can be made sufficiently small by the connecting member, the gap is not conspicuous visually, and high image quality can be ensured.

  In large screens that are assembled by simply butting the end faces of an optical sheet, the end face is usually whitened when the original sheet is cut and prepared as an optical sheet. Is a color different from the color of the surface that receives and reflects the light (for example, when the reflection layer is a selective reflection film, it appears gray in a bright room). For this reason, when the projection light is not irradiated on the screen, a gap portion (tiling portion) where the optical sheets are abutted with each other is conspicuous, which is not preferable in appearance. In addition, in the optical sheet having the light diffusion layer, a part of the incident projection light is irregularly reflected in the diffusion layer and leaks from the cut end face, so that the gap portion (tiling portion) appears to shine white during projection projection. There is a case.

  On the other hand, in the screen module according to the eleventh aspect, by taking measures against optical defects by applying the colorant, the tiling portion is visually observed, that is, on the appearance when the projection light is not irradiated on the large screen. Then, in addition to being inconspicuous, it does not look white, and high video quality can be ensured. According to the invention of claim 12, since the end face of the optical sheet is the same color as the ground color of the screen front surface, no projection light is projected, and the large screen Even if you look at it, it becomes less noticeable and the product value is improved.

In the invention according to claim 13, as the reinforcing resin plate, for example, a polyester sheet (particularly, polyethylene terephthalate) or a polyamide sheet is employed.
Since the optical sheet according to the thirteenth aspect is strong and excellent in shape stability, the operation for adjusting the gap between the screen modules and the operation for attaching the frame to the optical sheet can be performed easily and accurately. Moreover, even if some curl remains on the optical sheet main body, when this is laminated on the resin plate via the adhesive sheet, this wrinkle can be easily corrected.

  According to the fourteenth to eighteenth aspects of the present invention, since the reflecting layer reflects the projector light and allows almost all the light other than the projector light to pass therethrough, it is possible to display an image with high brightness and high contrast even in a bright environment. Screen can be realized. Further, by providing the light absorption layer, the black level of the video can be lowered and the contrast represented by the ratio between the white level and the black level can be further increased.

  By using the screen module according to the nineteenth aspect, it is possible to produce a large-sized screen having a good appearance with a frame attached over the entire four sides.

According to the invention of claim 20, a large screen once produced is disassembled into a plurality of screen modules, and these are stacked or aligned to form a compact form, thereby reducing the occupied area of the transfer and easily transferring it to the use site. can do. Moreover, since it is not necessary to adjust the space | interval between screen modules after conveying to a use field, a large sized screen can be produced quickly, correctly, and easily.
Also, even an optical sheet manufactured by a winding type is divided as a small screen body constituting a screen module and is fixed by a frame, so that the optical sheet is warped due to curl even in the state of a large screen. As a large screen, projection focus characteristics are improved, and irregular reflection due to curling can be prevented.
In the invention of claim 21, since it is sufficient to assemble in order of numbers, a large screen can be produced more quickly and accurately. At this time, the number may be clearly indicated on the screen module.

  In the large screen according to the invention of claim 23, a high-quality projected image can be secured, and it can be simply and quickly disassembled into a screen module and transported to another place, and again a simple and rapid large screen. Can do.

When a large screen is manufactured by connecting the screen modules according to claim 24, the gap between adjacent screen modules is located on the surface of the frame B that protrudes from the end face of the optical sheet.
That is, since the free end of the optical sheet on the frame A side is located on the flat surface of the frame B, even when using an optical sheet in which some curl remains, it is between adjacent screen modules. Therefore, there is no step on the front surface, and the gap between the screen modules can be easily set and maintained at an appropriate value.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
First Embodiment FIG. 1 is a perspective view showing the entire structure of a screen module 10 as viewed from the back side. The screen module 10 includes a rectangular optical sheet 11, that is, a plurality of lightweight metal (for example, aluminum) or plastic square pipe frames 12 on a rear side edge of a screen main body (hereinafter sometimes referred to as an optical sheet). The frame body made of is bonded by a double-sided adhesive tape (not shown) or by application of an adhesive.
In this case, the outer dimension of the frame body formed by connecting the plurality of square pipe frames 12 and having an overall “field shape” is slightly smaller than that of the optical sheet 11, and the outer edge portion of the optical sheet 11 is It should be on the outside of the frame body (for example, outside 20 mm or less). Further, the frame body is composed of a rectangular portion and a cross-shaped portion connected to the inside of the rectangular body, but the cross-shaped portion may be omitted when the outer dimension of the frame body is not so large. . However, when a curl (this is likely to occur when the optical sheet is prepared as a raw material wound around a core having a relatively small diameter) remains on the optical sheet 11, It is preferable to employ a frame body in which the cross-shaped portions are connected.

  In addition, screen module connecting members 13 for connecting (tiling) the screen module 10 to other screen modules (not shown) are provided at appropriate positions on the outer four sides of the frame body. In the following description, this screen module connecting member is simply abbreviated as a connecting member. The connecting member 13 is a gap that adjusts the gap between the end faces of the adjacent optical sheets 11 by adjusting the interval between the square pipe frames 12 of the adjacent screen modules in the assembled large screen. Although the adjusting member is provided, the structure and function of the connecting member 13 will be described later. In this embodiment, two connecting members 13 are provided on each of the four outer side square pipe frames 12 constituting the frame body. The number of the connecting members 13 to be attached depends on which of the assembled large screens. It is obvious that this differs depending on whether the screen module 10 is located at the site, that is, whether it is located at the center of the large screen composed of a large number of screen modules or at the outer periphery. Furthermore, as described later, an angle frame having an L-shaped cross section can be used instead of the square pipe frame 13.

Second Embodiment FIG. 2 is a perspective view of a large-sized screen 200 with a frame having a size of, for example, 400 inches, as viewed from the front surface side (the side on which projection light is irradiated). The large screen 200 is configured by connecting (tiling) 16 100-inch screen modules. Specifically, four screen modules 10 shown in FIG. 1 are located in the center, and 12 screen modules 10 with a frame attached are connected so as to surround the four screen modules. The large screen 200 is fixed to the column 211. In the screen module to which the above-described frame is attached, the frame is attached to one side or two adjacent sides among the four outer peripheral sides of the screen module. That is, a frame is attached to only one side in the reference numerals 202, 204, 207, and 208, and a frame is attached to two adjacent sides in the reference numerals 201, 203, 205, and 209. The module does not have a picture frame attached. The above-described screen module with a frame is configured by attaching a plastic or lightweight metal band to the outer peripheral portion of the surface of the screen module 10 of FIG.

  In addition, it replaces with the said large screen 200 with the support | pillar 211, and the large screen which has not attached the support | pillar 211 can also be fixed to an indoor pillar or wall. Further, various large screens having different sizes and aspect ratios can be easily assembled by various combinations of the screen module of FIG. 1 and the frame module with the frame.

3rd Embodiment FIG. 3: is a perspective view which shows the assembly structure of the hanging type large screen 120, Comprising: It is seen from the back side. The large screen 120 is configured by connecting a plurality of horizontally long screen modules 121 having a considerably larger horizontal dimension than a vertical dimension by a connecting member 124 in the vertical direction. Although the angle frame 123 is used as the frame, a square pipe frame can be adopted instead. In FIG. 3, reference numeral 122 denotes an optical sheet.

Fourth Embodiment The present embodiment relates to a method for producing an optical sheet for constituting a selective reflection type large screen, and is an optical sheet prepared by appropriately cutting a raw sheet into a shape and size. By applying a colorant to the cut end face, the cut end face of the optical sheet is made inconspicuous, and glare (diffuse reflection) at the tiling portion between the screen modules (between the end faces of the optical sheet) during projection light projection It is intended to prevent.

  FIG. 4 is a perspective view showing an example of the main part structure of the ink application device 20 for coloring the cut end surface of the optical sheet to prevent irregular reflection in the manufacturing process of the screen module, and the ink application procedure thereby. This ink coating apparatus includes an ink kneading roller 21 and a transfer roller 22 that are in contact with each other, an ink supply unit (not shown), and the like.

When applying ink, the transfer roller 22 is brought into contact with the cut end surface 11a (or 122a) of the optical sheet 11 (or 122), and the ink 23 for preventing irregular reflection is supplied to the ink kneading roller 21 from the ink supply unit. The ink kneading roller 21 is rolled while being brought into pressure contact with the transfer roller 22. As the ink, for example, a dye ink, a pigment ink, a plastic ink, and a UV curable ink can be adopted, but a pigment paint can be used instead.
In addition, it is preferable that a coloring agent is the same color as the ground color of the front surface of an optical sheet.

Fifth Embodiment This embodiment is also effective for producing a selective reflection type large screen module, and FIG. 5 shows a coloring for preventing irregular reflection on the cut end surface of the optical sheet in the manufacturing process of the screen module. It is a perspective view which shows an example of the principal part structure of the ink application apparatus 30 for performing this, and the ink application procedure by this.

  The ink application device 30 includes a dispenser 31 that stores ink, a rotatable pen tip 32 that is connected to the lower end of the dispenser 31, and the like. The dispenser 31 also has a function of supplying ink to the pen tip 32. As the nib 32, a nozzle having a large number of ink supply holes or a felt capable of holding ink between fibers is employed.

  When applying ink, the nib 32 is rolled on the cut end face in a state where the pen tip 32 is in contact with the cut end face 11 a of the optical sheet 11. As a result, the ink 33 from the dispenser 31 is applied to the cut end surface 11 a via the pen tip 32. In FIG. 5, reference numeral 34 denotes an ink supply pipe.

Sixth Embodiment FIG. 6A relates to an example of a screen module connecting member used for assembling a large screen, and its structure and usage, that is, a perspective view showing a screen module connecting structure (tiling structure). FIG. FIG. 6B is an explanatory diagram showing a state in which adjacent screen modules are connected and the interval d between the screen modules is adjusted. In addition, the angles 51 and 53 shown in FIG. 6 show a part in the longitudinal direction for convenience.

  The connecting member 40 includes a joint bolt 41 having a cut-out cross section that is flattened over its entire length, and a pair of module interval adjustment nuts 42 and 43 (hereinafter referred to as an adjustment nut) screwed into the joint bolt. And a pair of lock nuts 44 and 45. These lock nuts are for locking the adjustment nut in a state where the screen modules are connected to each other at a desired interval so as not to be easily rotated by an external force.

  On the other hand, insertion holes 52 and 54 for the joint bolt 41 are formed in the light metal angles 51 and 53 constituting the screen modules 61 and 62 to be connected to each other. The shapes and dimensions of these insertion holes are substantially the same as those of the joint bolt 41 cross section. Therefore, the joint bolt 41 can hardly be rotated with respect to the insertion holes 52 and 54.

  In a state where the connecting member 40 is not used, this is performed in the same manner as in FIG. Specifically, the joint bolt 41 is inserted into, for example, the insertion hole 52 of the angle 51 (frame A) on the screen module 61 side, and one lock nut 44 is inserted into one portion protruding from the ang 51 of the joint bolt 41. It is preferable to screw the pair of adjusting nuts 42 and 43 and the other lock nut 45 into the other part that is screwed and protrudes from the angle 51, thereby preventing the connection member 40 from being lost. can do.

  Next, an example of a screen module connecting method using the connecting member 40 will be described. By previously bringing both screen modules close to each other, the interval between the angles 51 and 53 is reduced to an appropriate one. One side of the joint bolt 41 screwed with the adjusting nuts 42 and 43 at the center in the longitudinal direction is inserted into the insertion hole 52 of one angle 51, and the other side of the joint bolt 41 is inserted into the insertion hole 54 of the other angle 53. Insert. A lock nut 44 and a lock nut 45 are respectively screwed into the joint bolt portion projecting from the angle 51 and the joint bolt portion projecting from the angle 53, and at least one of the adjustment nuts 42 and 43 is rotated. Adjust the interval. Next, the lock nuts 44 and 45 are screwed into the joint bolt 41 and pressed against the angles 51 and 53, whereby the angle 51 is tightened with the lock nut 44 and the adjustment nut 42 as shown in FIG. The angle 53 is tightened with the lock nut 45 and the adjustment nut 43. In the above adjustment, the distance between the screen modules to be connected to each other (the distance between the end portions of the optical sheets 61 and 62) d is, for example, 30 μm or less so that the end surfaces of the optical sheets 61 and 62 are substantially in close contact with each other. Repeat until appropriate value is reached. In the above operation, even if the adjustment nuts 42 and 43 are rotated, the joint bolt 41 does not rotate together. This is because the joint bolt 41 cannot rotate with respect to the insertion holes 52 and 54.

Seventh Embodiment FIG. 7 is a perspective view showing the structure of another example of a screen module connecting member used for assembling a large screen and a method of using the same. The inside of the circle indicated by the symbol A is an explanatory view of the main part showing the form of the screen module connecting member in a state in which the interval between adjacent screen modules is adjusted. In addition, the angles 51 and 53 show the longitudinal direction part for convenience like the case of FIG.

  7 is different from the connecting member 40 shown in FIG. 6 in that (1) the cross-sectional shape of the bolt 41A and the cross-sectional shapes of the insertion holes 56 and 58 formed in the angles 51 and 53 are made circular. (2) The lock nuts 46 and 47 are tapered centering nuts. The cross-sectional shape of the lock nut 46 (the shape and dimensions of the lock nut 47 are the same as those of the lock nut 46) is as shown in a circle with a symbol A, and includes a taper portion 46a whose diameter is reduced in the axial direction. , 47 are used by being screwed into the joint bolt 41A so that the tapered portion is positioned on the side closer to the angles 51, 53.

  Next, the screen module connecting method by the connecting member 40A is the same as that of the connecting member 40. An example of this will be described. In FIG. 7, the adjacent screen modules are brought close to each other in advance to reduce the interval between the angles 51 and 53 to an appropriate one. The distance between the adjustment nuts 42 and 43 is adjusted, and then the lock nuts 46 and 47 are screwed into the joint bolt 41A and pressed against the angles 51 and 53, thereby tightening the angle 51 with the lock nut 46 and the adjustment nut 42 ( At the same time, the angle 53 is tightened with the lock nut 47 and the adjustment nut 43.

  When the interval adjustment operation between the screen modules is completed, the adjustment nut 42 is pressed against one surface of the angle 51, and the taper portion 46a of the lock nut 46 is inserted into the insertion hole of the angle 51, as shown in a circle of symbol A. 56. Similarly, the adjustment nut 43 is in pressure contact with one side of the angle 53, and the taper portion of the lock nut 47 is in pressure contact with the insertion hole 58 of the angle 53. In this way, by pressing the tapered portions of the lock nuts 46 and 47 to the insertion holes 56 and 58 of the angles 51 and 53, the step between the front surfaces of the screen modules connected to each other and the screen module Accordingly, it is possible to easily eliminate the displacement between the screen modules in the direction along the surface, and to construct a large screen having a flat and accurate shape, for example, an accurate rectangular shape.

Eighth Embodiment FIG. 8 is a perspective view showing the entire structure of the screen module 70, as viewed from the back side. FIG. 9 is an exploded perspective view showing a structure of another example screen module connecting member (gap adjusting member) 80 used for assembling a large screen and a method of using the same. In FIG. 9, the inside of the right circle indicated by the symbol B and the inside of the left circle indicated by the symbol C are sectional views showing a state where the fixing bolts 84 and 92 are locked by the lock nuts 83 and 91. FIG. 10 is a perspective view showing the structure of a large screen assembled using the screen module 70 and the connecting member 80, as viewed from the back side.

  The connecting member 80 includes a fixing bolt 84 with a taper portion 84a for centering inserted into the insertion hole of one angle 72, a lock nut 83 and a turnbuckle rotation lock nut 82 screwed into the fixing bolt 84. And a fixing bolt 92 with a taper portion 92a for centering inserted into the insertion hole of the other angle 74, a lock nut 91 screwed into the fixing bolt 92, and screwed into the lock nut 91. It comprises a set screw 93 and a turnbuckle 81 screwed to both the fixing bolts 84 and 92. The turnbuckle 81 is formed with a hole 81a for forward / reverse rotation thereof. In the turnbuckle 81, the direction of the screw that is screwed to the fixing bolt 84 is reversed to the direction of the screw that is screwed to the fixing bolt 92 (reverse screw lead), and the direction of the screw of the turnbuckle rotation lock nut 82 is reversed. Is the same as the screw direction of the fixing bolt 84. The turnbuckle 81 is a member for enlarging / reducing the interval between the angles 72 and 74 by forward / reverse rotation. 8 and 10, reference numeral 71 denotes an optical sheet.

  Next, an example of a screen module connecting method using the connecting member 80 will be described. As shown in FIG. 9, the fixing bolt 84 is inserted into the insertion hole of the angle 72 and is locked by the lock nut 83 (see the inside of the right circle indicated by the symbol B). One side of the turnbuckle 81 and the turnbuckle rotation lock nut 82 are screwed onto the fixing bolt 84. On the other hand, the fixing bolt 92 is inserted into the insertion hole of the angle 74, and this is locked by the lock nut 91 and the set screw 93 (refer to the left circle indicated by the symbol C). The set screw 93 is a member for locking the lock nut 91 to the fixing bolt 92.

  Next, the screen modules adjacent to each other are brought close to each other, and the interval between the angles 72 and 74 is reduced. The fixing bolt 92 is screwed on the opposite side of the turnbuckle 81. The interval between the angles 72 and 74 is set to a predetermined value by rotating the turnbuckle 81 in an appropriate direction by an appropriate number of rotations. Further, the turnbuckle rotation lock nut 82 is tightened so that the turnbuckle 81 does not rotate by an external force. At the time when the above screen module connecting operation is completed, one end surface of the turnbuckle 81 and one surface of the lock nut 91 are in pressure contact.

  In order to change the interval between the angles 72 and 74 from the above state, the interval between the angles is increased or decreased by loosening the lock nut 82 and rotating the turnbuckle 81 in a predetermined direction by a predetermined number of rotations. After the reduction, the lock nut 82 may be tightened again.

  FIG. 10 is a perspective view showing the assembly structure of the large screen, as viewed from the back side. This large screen is provided with four screen modules 70 (M1 to M4) in which two connecting members 80 shown in FIG. 9 are provided on each side, and the cut end face of each optical sheet is subjected to a coloring treatment for preventing irregular reflection. It is connected and configured. The assembly of the large screen by the above four screen modules is performed according to the following procedure.

  Once the screen modules M1 to M4 are connected in the above manner, a large screen having the structure shown in FIG. 10 is assembled, and appropriate numbers or symbols (for example, 1, 2, 3, etc.) are assembled to the screen modules M1 to M4 in the order of assembly. 4) is written. Further, the fixing force of the lock nut 91 by the set screw 93 is set such that the lock nut 91 cannot be loosened unless a tool such as a spanner is used. Next, the lock nut 91 is loosened with a wrench and the fixing bolt 92 is rotated to release the pressure contact between one end surface of the turnbuckle 81 and one surface of the locknut 91 and the screw between the fixing bolt 92 and the turnbuckle 81. Dissolve and disassemble into the four screen modules (see FIG. 14 to be described later).

  The screen modules M1 to M4 are stacked one above the other to form a compact form and conveyed to a construction site where a large screen is used, and then a large screen is assembled by the reverse procedure of the above disassembly operation. That is, the fixing bolt 92 is screwed into the turnbuckle 81 so that one surface of the lock nut 91 is pressed against one end surface of the turnbuckle 81. Next, the lock nut 91 is tightened, and the lock nut 91 is fixed to the fixing bolt 92 with a sufficient force by the set screw 93. As a result, a large screen having the same form and size as the once assembled large screen is reproduced, and the spacing between adjacent screen modules is the same as that of the large screen before disassembly.

  As described above, once the large screen is assembled in the factory and the above gap adjustment state is set to an appropriate one, the assembly number of each screen module is 1, 2, 3 or A, B, C, etc. Is written. Thereafter, one lock nut of the pair of lock nuts is removed and disassembled into screen modules. After transporting these screen modules to the site, the lock nuts are screwed to assemble a predetermined large screen. By performing such an operation, even a very large screen can be easily transported, and the large screen can be reassembled quickly, conveniently, and accurately.

Ninth Embodiment FIG. 11 is a perspective view of a principal part showing a configuration of a large screen effective particularly when using a screen module made of an optical sheet in which a curl, curl, warp, etc. remains in an original fabric roll. The structure of the gap adjustment portion of the two optical sheets to be tiled with each other is shown from the front side.

  This large screen is produced by the following procedure. A first square pipe frame 102A (frame A) having a square cross section, and a second square pipe frame 104A (frame B) having a rectangular cross section and a width wider than that of the first frame 102A and equal in height to the frame 102A. In the meantime, the connecting member 80 shown in FIG. 9 is attached. Here, the second square pipe frame 104A is in a state where a part of the surface of the frame 104A in contact with the optical sheet protrudes from the end surface of the optical sheet to be attached. Further, the first adhesive portion 101a is formed by attaching a double-sided adhesive tape to one surface of the first frame 102A or applying an adhesive. In the second frame 104A, a second adhesive portion 103a is formed by applying a double-sided adhesive tape to one side in the width direction (the side far from the first frame 102A) or applying an adhesive.

  Next, in the first optical sheet 101A, a portion inside and close to one end is attached to the first frame 102A with the first adhesive portion 101a, and the end is connected to the second end. The frame 104A is placed on one side (the side close to the first frame 102A of the flat upper surface) (but not bonded). In the second optical sheet 103A, one end is attached to the second frame 104A at the flat second adhesive portion 103a. In this case, the gap between the first and second optical sheets 101A and 103A, that is, the butting portion D is located on the wide frame 104A, and the optical sheet on the first frame 102A side on the surface of the frame 104A. The end face is supported.

  Note that the other end of the first optical sheet 101A on the side not shown in FIG. 11 is the width of the wide frame (not shown), like the one end of the second optical sheet 103A. Adhere to one direction. Further, in the second optical sheet 103A, the other end portion on the side not shown in FIG. 11 has a narrow width in the vicinity of the end portion, similarly to the one end portion side of the first optical sheet 101A. While sticking to a frame (not shown), the end is placed on one side in the width direction of a wide frame (not shown).

  In the large screen according to the present embodiment, paying attention to the adjacent screen modules, the free ends of one of the screen modules are located on the flat surface of the second square pipe 104A. Even when an optical sheet is used, there is no step between the front faces of adjacent screen modules, and the gap between the screen modules can be easily set and maintained at an appropriate value. .

Tenth Embodiment FIG. 12 is a perspective view showing a state in which a plurality of screen modules are stacked so as to be easily transported. FIG. 13 is a perspective view of a large screen assembled by the plurality of screen modules, as viewed from the back side. FIG. 14 is a perspective view showing a procedure for assembling a large screen using the screen module and the screen module connecting member shown in FIG.

  In the present embodiment, similar to the eighth embodiment, the large screen shown in FIG. 13 once assembled is disassembled into a plurality of screen modules M1 to M4, and these screen modules are moved up and down as shown in FIG. The large screen shown in FIG. 13 is assembled according to the procedure shown in FIG.

  When connecting the screen modules, as shown in FIG. 14, the fixing bolt 92 is screwed into the turnbuckle 81 so that one side of the lock nut 91 is pressed against the end face of the turnbuckle 81. Next, the lock nut 91 is tightened, and the lock nut 91 is fixed to the fixing bolt 92 with a sufficient force by the set screw 93. By the above operation, a large screen having the same form and size as the once assembled large screen is reproduced.

Eleventh Embodiment FIG. 15 is an exploded perspective view showing the entire structure of the large screen 100. FIG. 16 is a perspective view showing a structure and usage method of a screen module connecting member 80A used for assembling the large screen. In the large screen 100, a plurality of horizontally long screen modules 101 to 103 are connected in a vertical direction with a connecting member 80A similar in structure to the connecting member shown in FIG. The column weights 106 are respectively fixed to the lower end of the screen module 103.

  The basic structure of the connecting member 80A is the same as that shown in FIG. 9, and as shown in FIG. 16, the lower screen module (not shown) becomes the upper screen module (not shown) by the rotation of the turnbuckle 81. It is configured to approach and separate from (omitted). In FIG. 16, reference numerals 72a and 74a are double-sided adhesive tapes or adhesives.

Twelfth Embodiment FIG. 17 is a perspective view showing the structure and usage method of a screen module connecting member 180 used for assembling a large screen. FIG. 18A is a cross-sectional view showing the structure of the connecting member, showing a state before adjusting the interval between the screen modules, and FIG. 18B explains the operation of the connecting member. It is sectional drawing, Comprising: The state which adjusted the space | interval between screen modules is shown.

  The connecting member 180 includes the following elements: a fixing bolt 181, a lock nut 182, a first joint bolt 183, a second joint bolt 184, a lock screw (set screw) 185, and a lock nut 186.

  The fixing bolt 181 has a nut 181a at the top, a centering taper 181b at the upper part, concentricity, a male screw 181c at the middle, and a cylindrical part 181d at the lower part. The lock nut 182 has a centering taper part 182a concentrically in the lower half, and is screwed into the male screw 181c of the fixing bolt.

  In the first joint bolt 183, a plurality of longitudinal slits 183b are formed in the upper end cylindrical portion 183a, the upper portion has a smaller diameter than the upper end cylindrical portion 183a, and a circular shape that can fit and remove the column portion 181d of the fixing bolt 181. A hole 183c is formed, a centering taper portion 183d is formed in the middle portion, a male screw 183e is formed in the lower portion, and the circular hole 183c, the centering taper portion 183d, and the male screw 183e are formed in the upper cylindrical portion 183a. Concentric with.

  In the second joint bolt 184, a plurality of longitudinal slits 184b are formed in the upper cylindrical portion 184a, a female screw 184c having a diameter smaller than that of the upper cylindrical portion 184a is formed in the upper portion, and the female screw is formed in the upper portion side surface. A screw hole 185a communicating with 184c is formed, a centering taper portion 184d is formed in the middle portion, a male screw 184e is formed in the lower portion, and the female screw 184c, the centering taper portion 184d and the male screw 184e are formed as described above. Is concentric with the upper cylindrical portion 184a.

  The lock screw 185 is screwed into the screw hole 185a of the second joint bolt 184, and the fixing nut 186 is screwed into the male screw 184e of the second joint bolt 184. In addition, the male screw 183e of the first joint bolt 183 can be screwed into the female screw 184c of the second joint bolt 184.

  In this embodiment, the gap adjusting member is constituted by the first and second joint bolts 183 and 184 and the lock screw 185, and the depth of screwing of the first joint bolt 183 into the second joint bolt 184 is performed. Thus, the gap between adjacent screen modules is adjusted.

  Next, an example of an adjustment operation between the screen modules by the connecting member 180 will be described. A square pipe frame 191 (frame A) is attached to the back side of the optical sheet (not shown) positioned on the upper side, and a double-sided adhesive tape ( Or adhesive) 192. Similarly, a square pipe frame 193 (frame B) is stuck to a lower optical sheet (not shown) with a double-sided adhesive tape (or adhesive) 194. A fixing bolt 181 is inserted into a through-hole formed in the square pipe frame 191, and a lock nut 182 is screwed into a screw 181 c protruding from the lower side of the frame 191 of the fixing bolt to be brought into pressure contact with the frame 191. As a result, the fixing bolt 181 is locked to the frame 191.

  The second joint bolt 184 is inserted into a through-hole formed in the square pipe frame 193, and a lock nut 186 is screwed into a screw 184 e that protrudes below the frame 193 out of the joint bolt 184, and the frame 193 is screwed. As a result, the second joint bolt 184 is locked to the frame 193.

  The first joint bolt 183 is screwed and connected to the second joint bolt 184. Next, the first joint bolt 183 is firmly fixed to the second joint bolt 184 by screwing the set screw 185 into the screw hole 185a. In this state, the frame 193 is lifted and approached integrally with the optical sheet manually (or with a lifting device not shown), and the cylindrical portion 181d of the fixing bolt 181 is inserted into the female screw hole 183c of the first joint bolt 183. It is set as the state of Fig.18 (a) by screwing (inserting).

  Next, the first joint bolt 183 is rotated by an appropriate number of rotations in a direction in which the screwing depth of the male screw 183e into the female screw 184c is increased. Accordingly, as shown in FIG. 18B, the interval between the upper and lower screen modules (the gap between the optical sheets) is set to an appropriate value. At this time, the centering taper portion 182a presses against the slit 183b forming portion to expand the slit forming portion, and the centering taper portion 183a presses against the slit 184b forming portion to expand the slit forming portion. The optical sheet is connected in a centered state (a state in which there is no level difference between the front surfaces of adjacent optical sheets, and there is no vertical displacement), and an external force is applied to the first joint bolt 183. Does not rotate easily even if it acts on (anti-rotation effect), and an appropriate optical sheet interval is stably maintained for a long time. More preferably, the lock nut 182 is set on the fixing bolt 181 with a set screw (not shown).

  As described above, in this embodiment, the distance between the optical sheets can be adjusted by the rotation of the first joint bolt 183, and the core between adjacent screen modules can be adjusted by the press contact between the tapered portion and the slit forming portion. The proper connection state is maintained for a long time as the feeding is performed.

Thirteenth Embodiment FIG. 19 is a perspective view showing an assembly of screen modules 111 to 114 used for assembling a suspension type large screen 110 and an assembling procedure of the large screen 110 by this. This large screen is assembled using the connecting member 80A shown in FIG. 16, but a connecting member 180A shown in FIG. 20 can be used instead. The structure of the connecting member 180A is the same as that shown in FIG. 17 except that the lock nut 182 is fixed to the fixing bolt 181 more firmly by screwing the set screw 182b into the lock nut 182. It is different. Therefore, the detailed description about the structure of this connection member is abbreviate | omitted.

  Referring back to FIG. 19, in the uppermost screen module 111, an angle frame 123 having a plurality of hanging fittings 105 attached is bonded to the upper end portion, and a connecting member 80A is attached to the angle frame 123 bonded to the lower end portion. A plurality of combinations of the fixing bolt 92 and the lock nut 91 are attached among a plurality of components. In the screen modules 112 to 114 other than the uppermost stage, a plurality of components other than the fixing bolt 92 and the lock nut 91 among the components constituting the connecting member 80A are attached to the angle frame 123 bonded to the upper end, and bonded to the lower end. A plurality of combinations of the fixing bolt 92 and the lock nut 91 are attached to the angle frame 123.

  In the screen modules 111 to 114, the gap between adjacent modules is set to a desired value in advance. For this reason, these screen modules 111 to 114 are installed on the construction site in the same manner as in the case of using the connecting member 80A shown in FIG. By connecting the screen modules 111 to 114 in this order, the gap between the adjacent screen modules is set and maintained at a predetermined value, and the entire screen is flat, that is, there is no step between the four screen modules and is flush. The large screen 110 having a predetermined specification can be easily and quickly reproduced. As described above, according to the screen module according to the present embodiment, after these are stacked in layers and transported to the construction site easily in a compact form, a large screen having a predetermined specification is easily and quickly assembled here. Is possible.

Fourteenth Embodiment FIG. 21A is a perspective view showing a state in which a plurality of screen modules 131 to 134 are stacked one above the other so as to be convenient for transportation, as viewed from the back side. is there. FIG. 21B is a perspective view showing the structure of a large screen 130 configured by connecting these screen modules, and is also viewed from the back side thereof. These screen modules 131 to 134 are connected by the already-described connecting member 80A.

  Among the screen modules 131 to 134, for example, in the module 134, the optical sheet has a reinforcing resin plate 134 a on the back side, an adhesive sheet 134 b, and a coloring treatment for preventing irregular reflection on the cut end face as shown in FIG. The optical sheet main body (screen main body) 134c on the front side that has been subjected to is laminated in this order, and the square pipe frame 135 is bonded to the reinforcing resin plate 134a side. The optical sheet structure of the other screen modules 131 to 133 is the same as that of the module 134. The structure other than the screen modules 131 to 134 is the same as that of the screen module of FIG. 19, and each screen module has a gap between adjacent modules set to a desired value in advance. After being transported, it is possible to easily and quickly assemble a large screen having a predetermined specification.

Fifteenth Embodiment FIG. 22 is a perspective view of curved screen modules 141 to 144 and a curved large screen 140 (generally forming part of a cylindrical surface) constituted by these. By making the frame shape on the back side of each of the screen modules 141 to 144 curved in the vertical direction of the screen, the curved large screen 140 is formed as a whole. Since the configuration of each of the screen modules and the connection structure thereof are the same as those according to the embodiment described above, a detailed description thereof will be omitted.

Sixteenth Embodiment A large screen 150 shown in FIG. 23 is a self-supporting type in which a large screen main body 151 constituted by connecting 24 screen modules in both vertical and horizontal directions is attached to a solid support column 152. It is a large screen.

For the large screen shown above, for example, in the case of a large screen of 300 inches or less, the screen module assembly procedure may be manualized in the form of an instruction manual or the like. Thereby, the clearance gap between the screen modules optimized in the manufacturing factory using the screen module concerning this invention can be reproduced now in a screen installation place.
For example, in the case of an event hall exceeding 300 inches or an extra large screen installed outdoors, the screen modules may be assembled while adjusting the gap between the screen modules by a gap adjustment mechanism at the installation site.

  By the way, an optical sheet used in the present invention, for example, an optical sheet 11 as shown in FIG. 1, is provided with a reflective layer that reflects projection light projected from a projector, and Al is deposited on a support. However, for example, a structure having selective reflection characteristics as shown in FIG. 24 is preferable.

  In FIG. 24, the optical sheet 11 has a configuration in which an optical multilayer film 2 that is a reflective layer and a light diffusion layer 3 are sequentially provided on a support substrate 1, and light absorption is further performed on the back side of the support substrate 1. Layer 4 is provided.

  The support substrate 1 is transparent and may satisfy any desired optical properties such as a transparent film, a glass plate, an acrylic plate, a methacrylstyrene plate, a polycarbonate plate, and a lens. As optical characteristics, it is preferable that the material constituting the support substrate 1 has a refractive index of 1.3 to 1.7, a haze of 8% or less, and a transmittance of 80% or more. Further, the support substrate 1 may have an antiglare function.

  The transparent film is preferably a plastic film, and examples of the material forming the film include cellulose derivatives (eg, diacetylcellulose, triacetylcellulose (TAC), propionylcellulose, butyrylcellulose, acetylpropionylcellulose and nitrocellulose), polymethyl (Meth) acrylic resins such as methacrylates and copolymers of vinyl monomers such as methyl methacrylate and other alkyl (meth) acrylates, styrene, etc .; polycarbonate resins such as polycarbonate and diethylene glycol bisallyl carbonate (CR-39); (Brominated) Bisphenol A type di (meth) acrylate homopolymer or copolymer, (brominated) bisphenol A mono (meth) acrylate urea Thermosetting (meth) acrylic resins such as polymers and copolymers of monomer-modified monomers; polyesters, especially polyethylene terephthalate, polyethylene naphthalate and unsaturated polyesters; acrylonitrile-styrene copolymers, polyvinyl chloride, polyurethane, epoxy Resins are preferred. In addition, an aramid resin considering heat resistance can be used. In this case, the upper limit of the heating temperature is 200 ° C. or higher, and the temperature range is expected to be widened.

The plastic film can be obtained by a method such as stretching these resins, diluting them in a solvent, forming a film and drying them. The thickness is preferably thick from the viewpoint of rigidity, but is preferably thin from the haze side, and is usually about 25 to 500 μm.
In addition, the surface of the plastic film may be coated with a coating material such as a hard coat, and the presence of this coating material in the lower layer of an optical multilayer film composed of an inorganic substance and an organic substance allows adhesion, hardness, Various physical properties such as chemical resistance, durability, and dyeability can also be improved.

  The optical multilayer film 2 has a configuration in which a high refractive index optical film 2H as a first optical film and a low refractive index optical film 2L as a second optical film are alternately stacked. In FIG. 5, an optical film 2H having a high refractive index is first provided on one surface of the support substrate 1, followed by an optical film 2L having a low refractive index, and thereafter the optical film 2H and the optical film 2L are provided alternately. Finally, the optical film 2H is provided, which is a laminated film composed of 2n + 1 layers (n is an integer of 1 or more). The laminated film may be provided on both surfaces of the support substrate 1. In that case, the number of stacked layers on both sides is 2 (2n + 1) layers.

The optical film 2H can be formed by, for example, applying a high refractive index optical film material on the support substrate 1 or the optical film 2L and curing it. The optical film 2H contains fine particles in order to adjust the refractive index.
The film thickness of the optical film 2H is 80 nm to 15 μm, more preferably 600 to 1000 nm. This is because if the thickness is greater than 15 μm, the haze component due to fine particles that cannot be dispersed increases and the function as an optical film cannot be obtained.
The refractive index of the optical film 2H is preferably 1.70 to 2.10. When the refractive index is higher than 2.10, the dispersibility of the fine particles is insufficient and the function as an optical film is impaired. On the other hand, if the refractive index is lower than 1.70, the reflection characteristics when the optical film 2L is laminated are not sufficient, and the characteristics as a screen are insufficient.

The optical film 2L can be formed by, for example, applying and curing a low refractive index optical film material on the optical film 2H. The refractive index of the optical film 2L is preferably 1.30 to 1.69. The refractive index of the optical film 2L is determined by the type of resin contained in the low refractive index optical film material, and in some cases, the type and amount of fine particles added. If the refractive index is higher than 1.69, a difference in refractive index from the optical film 2H cannot be secured, and the reflection characteristics when laminated on the optical film 2H are not sufficient, and the characteristics as a screen are insufficient. . In addition, it is difficult to form a film having a refractive index lower than 1.3, and the refractive index 1.3 is a lower limit in manufacturing.
The film thickness of the optical film 2L is 80 nm to 15 μm, more preferably 600 to 1000 nm.

Here, the high refractive index optical film material and the low refractive index optical film material for forming the optical film 2H and the optical film 2L will be described.
(1) High refractive index optical film material The high refractive index optical film material contains fine particles, an organic solvent, a binder that absorbs energy to cause a curing reaction, and a dispersant.

The fine particles are fine particles of a high refractive index material that is added to adjust the refractive index of the optical film after film formation, such as Ti, Zr, Al, Ce, Sn, La, in, Y, and Sb. An oxide or an alloy oxide such as In—Sn can be given. For the purpose of suppressing the photocatalyst, the Ti oxide may contain an appropriate amount of an oxide such as Al or Zr. The specific surface area of the fine particles 55~85m ² / g are preferred, and more preferably 75~85m ² / g. When the specific surface area is in this range, it is possible to suppress the particle size of the fine particles in the optical film material to 100 nm or less by dispersing the fine particles, and an optical film having a very small haze can be obtained.

  Organic solvents include, for example, ketone solvents such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, alcohol solvents such as methanol, ethanol, propanol, butanol, isobutyl alcohol, methyl acetate, ethyl acetate, butyl acetate, propyl acetate, ethyl lactate An ester solvent such as ethylene glycol acetate is used. These organic solvents do not necessarily need to be 100% pure, and may contain impurities such as isomers, unreacted products, decomposed products, oxides, and moisture if they are 20% or less. Moreover, in order to apply on a support substrate or an optical film having a low surface energy, it is desirable to select a solvent having a lower surface tension, such as methyl isobutyl ketone, methanol, ethanol and the like.

  Examples of the binder that undergoes a curing reaction with the dispersant include a thermosetting resin, an ultraviolet (UV) curable resin, and an electron beam (EB) curable resin. Examples of thermosetting resin, UV curable resin, EB curable resin are polystyrene resin, styrene copolymer, polycarbonate, phenol resin, epoxy resin, polyester resin, polyurethane resin, urea resin, melamine resin, polyamine resin, urea Examples include formaldehyde resin. Polymers having other cyclic (aromatic, heterocyclic, alicyclic, etc.) groups may also be used. Further, a resin containing fluorine or silanol group in the carbon chain may be used.

  The method for curing the resin may be either radiation or heat. However, when the resin curing reaction is performed by ultraviolet irradiation, it is preferably performed in the presence of a polymerization initiator. Examples of radical polymerization initiators include azo initiators such as 2,2′-azobisisobutyronitrile and 2,2′-azobis (2,4-dimethylvaleronitrile); benzoyl peroxide, lauryl peroxide And peroxide initiators such as t-butyl peroctoate. These initiators are used in an amount of 0.2 to 10 parts by weight, more preferably 0.5 to 5 parts by weight per 100 parts by weight of the polymerizable monomers.

The dispersant for dispersing the fine particles has a content of 3.2 to 9.6 × 10 ¹¹ mol / m ² with respect to the fine particles, but if the content is less than this, sufficient dispersibility is obtained in the optical film. I can't. On the other hand, if the content is large, the volume ratio of the dispersant in the coating film increases, so that the film refractive index decreases and the refractive index adjustment range becomes narrow, making it difficult to design an optical film stack.

The amount of the polar functional group of the hydrophilic group contained in the dispersant is 10 ⁻³ to 10 ⁻¹ mol / g. When the functional group is smaller or larger than this, the effect on the dispersion of the fine particles is not exhibited, leading to a decrease in dispersibility.
As the polar functional group, the following functional groups are useful because they are not in an aggregated state.
_{· -SO 3 M, -OSO 3 M} , -COOM, P = O (OM) 2 ( where, M in the formula, or a hydrogen atom, lithium, potassium, an alkali metal such as sodium.), Tertiary Amine, quaternary ammonium salt, R ₁ (R ₂ ) (R ₃ ) NHX (wherein R ₁ , R ₂ and R ₃ are hydrogen atoms or hydrocarbon groups, X is chlorine, bromine, iodine) Or halogen element ions such as inorganic or organic ions.)
-There are no particular restrictions on the introduction site of polar functional groups such as -OH, -SH, -CN, and epoxy groups. These dispersants can be used singly or in combination of two or more.

The total amount of the dispersant in the coating film is preferably 20 to 60 parts by weight, more preferably 38 to 55 parts by weight with respect to 100 parts by weight of the fine particles.
Further, the weight average molecular weight of the dispersant lipophilic group is preferably 110 to 3000. When the molecular weight is lower than this range, there are problems such as insufficient dissolution in organic solvents. Conversely, when it is too high, sufficient dispersibility cannot be obtained in the optical film. The molecular weight of the dispersant may be measured by a gel permeation chromatograph (GPC) method.
The dispersant may have a functional group for causing a curing reaction with the binder. In addition, when a binder other than the dispersant of the present invention is included, a polyfunctional polymer or monomer having many linking groups is preferable.
After the high refractive index optical film material is formed into a coating film by coating, the curing reaction is promoted by radiation or heat to form the high refractive index type first optical film 2H.

(2) Low Refractive Index Optical Film Material This optical film material is designed as a material for a layer having a low refractive index. Examples thereof include fluorine-containing resins, silica, and hollow fine particles, and a film having a refractive index of 1.45 or less is particularly preferable.

With regard to the fluorine-containing resin, examples of the polymer whose main chain is fluorine-modified include perfluoro main chain perfluoropolyether, perfluoro side chain perfluoropolyether, alcohol-modified perfluoropolyether, and isocyanate-modified perfluoropolyether. Examples of the fluorine-containing monomer include CF ₂ = CF ₂ , CH ₂ = CF ₂ , CF ₂ = CHF, and the like. A polymerized one can also be used.
Examples of the polymer whose side chain is modified with fluorine include those obtained by graft polymerization with a solvent-soluble main chain, and in particular, polyvinylidene fluoride is a resin that can be used as a solvent because it is easy to handle. Examples of preferred low refractive index thermoplastic polymers. When this polyvinylidene fluoride is used as the low refractive index thermoplastic polymer, the refractive index of the low refractive index layer is about 1.4. To further reduce the refractive index of the low refractive index layer, trifluoroethyl acrylate is used. Such a low refractive index acrylate may be added in an amount of 10 to 300 parts by weight, preferably 100 to 200 parts by weight, based on 100 parts by weight of the ionizing radiation curable resin.

The fine particles used as the low refractive index material include LiF (refractive index 1.4), MgF ₂ (refractive index = 1.4), 3NaF · AlF ₃ (refractive index = 1.4), AlF ₃ (refractive index = 1.4), ultrafine particles such as SiO _x (x: 1.5 ≦ x ≦ 2.0) (refractive index = 1.35 to 1.48) are used.
The low refractive index optical film material is formed into a coating film by coating, and then becomes a second optical film 2L having a lower refractive index than the first optical film by a curing reaction.
The production of the high refractive index optical film material and the low refractive index optical film material is performed by a kneading step, a dispersion step, and a mixing step provided before and after these steps. All raw materials such as fine particles, resins, and solvents to be used may be added at the beginning or during any step. In addition, individual raw materials may be added in two or more steps. For dispersion and kneading, a conventionally known apparatus such as an agitator or a paint shaker may be used.

  The optical films 2H and 2L of the optical multilayer film 2 are not limited to the materials and methods described above, and can be formed by a dry process such as sputtering using other high refractive index materials and low refractive index materials.

  With the above configuration, the optical multilayer film 2 has high reflection characteristics with respect to light in the three primary color wavelength bands of red, green, and blue, and at least transmits light in the visible wavelength region other than these wavelength regions. It has characteristics. In addition, by adjusting the refractive index and thickness of each of the optical films 2H and 12L, it is possible to shift and adjust the wavelength positions of the three primary color wavelength bands reflected as the optical multilayer film 2, thereby projecting from the projector. The optical multilayer film 2 can be made to correspond to the wavelength of light.

  In addition, the number of layers of the optical films 2H and 2L constituting the optical multilayer film 2 is not particularly limited, and can be a desired number of layers. Moreover, it is preferable that the optical multilayer film 2 per one side is comprised by the odd-numbered layer whose outermost layer becomes the optical film 2H. By making the optical multilayer film 2 an odd-numbered layer, the function as a three-primary-color wavelength band filter is superior to the case of an even-numbered layer. Specifically, an odd number of 3 to 7 layers is preferable. This is because when the number of layers is 2 or less, the function as a reflective layer is not sufficient. On the other hand, the reflectivity increases as the number of layers increases, but the increase rate of reflectivity decreases when the number of layers is 8 or more, and the effect of improving the reflectivity cannot be obtained as the time required for forming the optical multilayer film 2 is increased. is there.

  The light diffusing layer 3 has an uneven surface on one side, and there are no particular restrictions as long as the constituent material has a property of transmitting light in the wavelength region used in the projector, and it is usually used as a diffusing layer. Glass or plastic may be used. For example, a transparent epoxy resin may be applied on the optical multilayer film 2 and unevenness may be provided on the surface by embossing or the like, or a diffusion film having such a shape may be bonded together. The light selectively reflected by the optical multilayer film 2 diffuses when emitted through the light diffusion layer 3, and the viewer can visually recognize a natural image by observing the diffused reflected light. become able to.

  The light absorption layer 4 is for absorbing light transmitted through the optical multilayer film 2 and the support substrate 1. When the optical multilayer film 2 is formed only on one surface of the support substrate 1, the back surface of the support substrate 1 is used. In addition, when formed on both sides, it is formed on the outermost layer surface of the optical multilayer film 2 on the side opposite to the incident side of the projector light. The light absorbing layer 4 can be formed by attaching a black resin film or applying a black paint.

  The optical sheet 11 suppresses surface scattering of incident light on the screen, reflects light of a specific wavelength from the projector, and transmits and absorbs incident light in other wavelength regions such as external light. It is possible to achieve high contrast by lowering the black level of the image on the optical sheet 11, and it is possible to display an image with high contrast even in a bright room. For example, when light from an RGB light source such as a diffraction grating type projector using a grating light valve (GLV) is projected, the optical sheet 11 has a wide viewing angle, high contrast, and reflection of external light. You will be able to appreciate good images without

  That is, the light incident on the optical sheet 11 passes through the light diffusing layer 3 without being scattered, reaches the optical multilayer film 2, and the external light component included in the incident light is transmitted through the optical multilayer film 2. The light is absorbed by the light absorption layer 4 and is selectively reflected only in a specific wavelength region relating to the image. The reflected light is diffused on the surface of the light diffusion layer 3 and provided to the viewer as image light having a wide viewing angle. The Therefore, the influence of external light on the image light that is the reflected light can be eliminated at a high level, and an unprecedented high contrast can be achieved.

It is a perspective view which shows the whole structure of the screen module which concerns on the 1st Embodiment of this invention, Comprising: It looked at from the back side. It is a perspective view of the large sized screen which concerns on the 2nd Embodiment of this invention, Comprising: The front side (side which irradiates projection light) is seen. It is a perspective view which shows the principal part structure of the large sized screen which concerns on the 3rd Embodiment of this invention, Comprising: It saw from the back side. It is a perspective view which concerns on the 4th Embodiment of this invention, and shows an example of the point which colors the cutting end surface of an optical sheet for irregular reflection prevention in the manufacturing process of a screen module. It is a perspective view which concerns on the 5th Embodiment of this invention and shows another example of the point which colors the cutting end surface of an optical sheet for irregular reflection prevention in the manufacturing process of a screen module. FIG. 6A is an exploded perspective view showing a structure of a first screen module connecting member and a gap adjusting member used for assembling a large screen and a method for using the same, according to a sixth embodiment of the present invention. is there. FIG. 6B is an explanatory view showing the form of the screen module connecting member in a state in which the interval between adjacent screen modules is adjusted. It is a disassembled perspective view which concerns on the 7th Embodiment of this invention, and shows the structure of the 2nd screen module connection member and clearance gap adjustment member used for the assembly of a large sized screen, and its usage method. Moreover, the inside of the code | symbol A is a principal part explanatory drawing which shows the form of the screen module connection member in the state which adjusted the space | interval between adjacent screen modules. It is a perspective view which shows the whole structure of the screen module which concerns on the 8th Embodiment of this invention, Comprising: It looked at from the back side. It is a disassembled perspective view which shows the structure of the 3rd screen module connection member and clearance gap adjustment member used for the assembly of a large sized screen, and the usage method. The left circle and the right circle in FIG. 9 are cross-sectional views showing a state where the fixing bolt is locked with a lock nut. It is a perspective view which shows the structure of the large sized screen assembled using the screen module of FIG. 8, and the screen module connection member of FIG. 9, Comprising: It is seen from the back side. It is a perspective view which shows the principal part structure (connection structure of screen modules) of the large sized screen which concerns on the 9th Embodiment of this invention, Comprising: It is seen from the front side. It is a perspective view which concerns on the 10th Embodiment of this invention and shows the state which stacked the several screen module so that it might be easy to convey. It is a perspective view of the large sized screen assembled by the several screen module shown in FIG. 12, Comprising: It is seen from the back side. It is a perspective view which shows the point which assembles a large sized screen using the screen module of FIG. 12, and the screen module connection member shown in FIG. It is a disassembled perspective view which shows the whole large screen structure which concerns on the 11th Embodiment of this invention. FIG. 16 relates to an example of a screen module connecting member used for assembling the large screen of FIG. 15 and is a perspective view showing the structure and usage method. It is a perspective view which concerns on the 12th Embodiment of this invention and shows the structure and usage method of the screen module connection member used for the assembly of a large sized screen. FIG. 18A is an explanatory diagram of the screen module connecting member of FIG. 17, and FIG. 18A is a cross-sectional view showing the structure of the connecting member, and shows a state before adjusting the interval between the screen modules; FIG. 18B is a cross-sectional view for explaining the operation of the connecting member, and shows a state in which the interval between the screen modules is adjusted. It is a disassembled perspective view which shows the whole structure of the large sized screen which concerns on the 13th Embodiment of this invention. It is a perspective view which shows the point which connects the screen module shown in FIG. 19 with a screen module connection member, and assembles a large sized screen. FIG. 21A is a perspective view showing a state in which a plurality of screen modules are stacked so as to be easily transported according to the fourteenth embodiment of the present invention. FIG. 21B is a perspective view of a large screen constituted by the screen module, and at the same time, shows a laminated structure in the screen module. It is a disassembled perspective view which shows the whole large screen structure which concerns on 15th Embodiment of this invention. It is a perspective view which shows the whole large screen structure based on the 16th Embodiment of this invention. It is sectional drawing which shows the structural example of an optical sheet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Support substrate, 2 ... Optical multilayer film, 2H, 2L ... Optical film, 3 ... Light diffusion layer, 4 ... Light absorption layer, 10 ... Screen module, 11 ... Optical sheet (screen main body), 11a ... Cutting end surface, 12 ... Square pipe frame, 13 ... Screen module connecting member, 20 ... Ink applicator, 21 ... Ink kneading roller, 22 ... Transfer roller, 23 ... Ink, 30 ... Ink applicator, 31 ... Dispenser, 32 ... Pen tip, 33 ... Ink, 34 ... Ink supply pipe, 40 ... Connecting member, 40A ... Connecting member, 41 ... Joint bolt, 41A ... Joint bolt, 42, 43 ... Module spacing adjusting nut, 44, 45 ... Lock nut, 46, 47 ... Lock nut 46a ... Taper for centering, 51, 53 ... Angle, 52, 54 ... Insertion hole, 56, 58 ... Insertion hole, 61, 62 ... Skew , 70 (M1 to M4) ... screen module, 71 ... optical sheet, 72 ... angle, 72a, 74a ... double-sided adhesive tape (or adhesive), 74 ... angle, 80 ..., 80A ... screen module connecting member, 81 ... Turnbuckle, 81a ... hole, 82 ... turnbuckle rotation lock nut, 83, 91 ... lock nut, 84, 92 ... fixing bolt, 84a ... taper for centering, 92a ... taper for centering, 93 ... set Screws, 100 ... large screen, 101-103 ... screen module, 101A ... first optical sheet, 101a ... first adhesive portion, 102A ... first square pipe frame, 103A ... second optical sheet, 103a ... first 2 adhesive portions, 104A, second square pipe frame, 105, hanging bracket, 10 ... Weight, 110 ... Large screen, 111-114 ... Screen module, 120 ... Large screen, 121 ... Screen module, 122 ... Optical sheet, 122a ... Cut end face, 123 ... Angle frame, 124 ... Connecting member, 130 ... Large screen, 131-134 ... screen module, 134a ... reinforced resin plate, 134b ... adhesive sheet, 134c ... optical sheet body (screen), 135 ... square pipe frame, 140 ... large screen, 141-144 ... screen module, 150 ... large screen, 151 ... large screen body, 152 ... support, 180 ... screen module connecting member, 180A ... connecting member, 181 ... fixing bolt, 181a ... nut, 181b ... taper for taper, 181c ... screw, 181d ... cylindrical part , 182 ... Lock nut, 182a ... Taper for centering, 182b ... Set screw, 183 ... First joint bolt, 183a ... Upper cylindrical part, 183b ... Slit, 183c ... Circular hole, 183d ... Taper for centering Part, 183e ... male screw, 184 ... second joint bolt 1, 184a ... upper end cylindrical part, 184b ... slit, 184c ... female screw, 184d ... taper part for centering, 184e ... screw, 185 ... set screw ( Lock screw), 185a ... screw hole, 186 ... fixing nut, 200 ... large screen, 201-209 ... screen module, 211 ... support, D ... gap (butting part)

Claims (23)

A screen module in which a frame A having a plurality of module connecting members is attached to at least one side of a rear side outer edge portion of a rectangular optical sheet,
The connecting member is an inter-module gap adjusting member (hereinafter, referred to as “module A”) that can adjust a distance between the frame A and a frame B attached to one side of the outer edge of the back side of the optical sheet of the adjacent screen module. A screen module characterized in that it has a gap adjusting member), can be connected to the frame B, and can be further separated. An insertion hole is formed in the frame A,
The connecting member includes a screw rod having screw portions at both ends and one end inserted into the insertion hole, a pair of gap adjusting nuts screwed into the screw rod, and one gap adjusting nut. A first lock nut that is screwed to the screw rod to be pressed and fixed to the frame A, and a second lock nut that is to press and fix the other gap adjusting nut to the frame B. The screen module according to claim 1.   The screw rod is flattened into a circular cross section, and the frame A is provided with a through hole having a circular cross section that is inserted through the screw rod but restricts its rotation as the insertion hole. The screen module according to claim 2. An insertion hole is formed in the frame A,
The connecting member includes a turnbuckle having a first female screw formed at one end and a second female screw formed at the other end, and a clearance adjustment comprising a turnbuckle rotation lock nut that restrains rotation of the turnbuckle. Members,
A first fixing bolt inserted into the insertion hole and screwed into the first female screw, a first lock nut for press-fixing the fixing bolt to the frame A, and a screw into the second female screw The screen module according to claim 1, further comprising: a second fixing bolt to be joined, and a second lock nut for press-fixing the fixing bolt to the frame B.   The screen module according to any one of claims 2 to 4, wherein the first and second lock nuts have conical tapered portions formed concentrically on one side in the axial direction. An insertion hole is formed in the frame A,
The connecting member includes a first joint bolt and a second joint bolt into which the joint bolt is screwed, and is adjacent to each other depending on a screwing depth of the first joint bolt with respect to the second joint bolt. The gap adjusting member for adjusting the gap between the screen modules;
A fixing bolt inserted into the insertion hole and locked to the first joint bolt, a lock nut for press-fixing the fixing bolt to the frame A, and a second joint bolt inserted into the frame B The screen module according to claim 1, further comprising a fixing nut for fixing the frame to the frame B. An insertion hole is formed in the frame A,
The connecting member has (1) a nut at the top, a centering taper part at the upper part, a concentric taper part at the lower part, a screw part formed at the lower part, and a fixing bolt inserted through the insertion hole; 2) a nut having a screw hole threadedly engaged with the screw portion of the fixing bolt at the top, a lock nut having a concentric centering taper portion at the lower half, and (3) a longitudinal slit in the upper cylindrical portion. Are formed, the upper part is smaller in diameter than the upper end cylindrical part, a circular hole is formed through which the cylindrical part of the fixing bolt can be fitted and removed, the center part has a centering taper part, and the lower part has a male screw And a first joint bolt in which the circular hole, the centering taper portion and the male screw are concentric with the upper cylindrical portion, and (4) a plurality of longitudinal slits are formed in the upper cylindrical portion, A female screw whose diameter is smaller than the upper cylindrical part is formed on the part. A screw hole communicating with the female screw is formed in the upper side surface, a centering taper portion is formed in the intermediate portion, a male screw is formed in the lower portion, and the female screw, the centering taper portion and the male screw are A second joint bolt that is concentric with the upper cylindrical portion, (5) a lock screw that is screwed into the screw hole of the second joint bolt, and (6) the second joint bolt. A fixing nut that is screwed onto the male screw,
The male screw of the first joint bolt can be screwed into the female screw of the second joint bolt,
The gap adjusting member is composed of the first and second joint bolts and the lock screw, and the adjacent screen modules are adjacent to each other depending on the depth of the first joint bolt screwed into the second joint bolt. The screen module according to claim 1, wherein the gap is adjusted.   2. The screen according to claim 1, wherein the frame A is a square pipe or an angle made of a lightweight metal or plastic, and is attached to the back surface of the optical sheet by double-sided adhesive tape or adhesive application. module.   The said frame A is attached to the back surface of the said optical sheet, an outer end surface is the inner side rather than the end surface of the said optical sheet, and the space | interval of these becomes 20 mm or less. Screen module.   2. The screen module according to claim 1, wherein when the adjacent screen modules are connected to each other, the gap adjusting member can substantially closely contact the end surfaces of the optical sheets of the screen modules. .   The screen module according to claim 1, wherein an end surface of the optical sheet is colored by applying a colorant.   The screen module according to claim 11, wherein the colorant has the same color as the front color of the optical sheet.   The optical sheet is formed by laminating an optical sheet body on a reinforcing resin plate via an adhesive sheet, and the reinforcing resin plate is adhered to the frame A. The screen module according to claim 1.   The optical sheet includes a reflective layer having high reflection characteristics with respect to light in a specific wavelength region and having high transmission characteristics with respect to light in at least a visible wavelength region other than the specific wavelength region. The screen module according to claim 1.   15. The reflective layer includes an optical multilayer film in which a high refractive index layer and a low refractive index layer having a lower refractive index are alternately stacked and an outermost layer having a high refractive index layer. Screen module.   The optical multilayer film is formed on both sides of a transparent support, and the number of both layers of the high refractive index layer and the low refractive index layer is 2 (2n + 1) layers (1 ≦ n ≦ 3). Item 16. The screen module according to Item 15.   15. The screen module, wherein the optical sheet is provided with a light absorption layer, a reflection layer according to claim 14, and a light diffusion layer sequentially.   The screen according to claim 15, wherein the specific wavelength region includes three primary color wavelength regions of red, green, and blue.   The screen module according to claim 1, wherein a frame is provided on at least one side of the front side outer edge portion of the screen module. In producing a large screen using a plurality of the screen modules according to claim 1,
The screen modules are connected to each other by the connecting member, and the large-sized screen having a predetermined structure and dimensions is assembled in advance by adjusting the gap adjusting member so that the optical sheet end faces of the screen modules are substantially in close contact with each other.
Then, after performing an appropriate operation on the gap adjusting member so that the interval between the screen modules adjusted by the assembly does not change due to external force,
A method for producing a large screen, comprising: disassembling the large screen into a plurality of screen modules, transporting them to a construction site by appropriate means, and then restoring the large screen assembled in advance by the connecting member.   21. The method for producing a large screen according to claim 20, wherein a number indicating an assembly order is assigned to each screen module when the large screen assembly is completed, and the module screen is assembled in the order of the numbers when the large screen is restored. .   A plurality of the screen modules according to any one of claims 1 to 19, wherein the frame A of the screen module is connected to the frame A at the outer edge of the back side of the optical sheet of the adjacent screen module via the connecting member. It is connected to a frame B attached to one opposing side, and by adjusting the gap adjusting member, the optical sheet end faces of these screen modules are substantially in close contact with each other, and the whole is configured to be a quadrangle. Large screen. The frame B is pasted in parallel with the end surface on the back surface of the optical sheet, with a part of the surface contacting the optical sheet of the frame B protruding from the end surface of the optical sheet to be attached,
The large screen according to claim 22, wherein an end surface of the optical sheet on the frame A side is supported by a surface protruding from an end surface of the optical sheet of the frame B.

Images