JPS62180345A - Constituting method for transmission type screen for large picture - Google Patents

Abstract

PURPOSE:To display an image of fast motion without any feeling of displeasure by placing a support column or support beam the projection dead space of each tranmission type screen unit, and coupling transmission type screen units with support columns or support beams in one body in using thin metallic plate holders. CONSTITUTION:Columns 10-1 and 10-2 are combined with the joint part between transmission type screen units A1 and A2. A metallic plate holder 13A is fitted integrally to the end surface of the transmission type screen unit A1 and column 10-1 with screws 14 and a metallic plate holder 13b is fitted integrally to the end surface of the transmission type screen unit A2 and column 10-2 with screws similarly. In this case, the metallic plate holders 13a and 13b are combined alternately in the lengthwise direction of the columns and when the both are combined together, the thickness of the metallic plate holder appears at the joint and the columns are put completely in the data space. The columns 10-1 and 10-2 are fixed in one body by running a bolt into a bolt hole 15. The thickness of the metallic plate holder requires only several mm, so its influence upon a visual field is a little.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a method of assembling and configuring a transmissive projection screen used in a 7" projection television and various projection devices, and particularly relates to a method for assembling and configuring a plurality of transmissive projection screens horizontally and/or The present invention relates to a method of assembling a multi-L/f screen that can be connected in the vertical direction and can be projected from a plurality of projectors to form one large screen.

PRIOR ART AND PROBLEMS TO BE SOLVED A conventional transmission type projection screen is, for example, a one-piece screen as shown in FIG. The lenticular lens 22a is provided with a molded body of a transparent synthetic resin with excellent optical properties, such as acrylic resin, vinyl chloride resin, styrene resin, polycarbonate resin, acrylonitrile-styrene copolymer resin, etc. It has been put into practical use because it can accurately maintain the relative position of the same lens, but due to manufacturing technology it is only possible to make lenses smaller than a certain size.As shown in Figure 8: A so-called two-piece screen in which the circular Fresnel lens 21b and the lenticular lens 22b are manufactured separately and then combined and bonded together is also known, but the lenticular lens sheet has a semi-cylindrical lens. To,
Although Fresnel lens sheets are relatively easy to form into long lengths, there is a limit to the molding size of the Fresnel lens sheet, as with the one-piece sheet described above.
Since the technology for making full use of its optical properties has not yet been developed, it has not been put to practical use in large screens.

Currently, a method is being considered to obtain a large screen called a multi-screen by combining many such transmissive screen units of a certain size or less, but each transmissive screen unit uses a frame such as aluminum sash and can be of any size. Since the pillars and/or girders were installed between the screen units, these supporting materials blocked the incident light flux, and as a result, the large width seams left a strong impression in that area, making it difficult to use in a wide range of commercial applications. It was supposed to hinder the development of

Regarding this measure, the inventor has already filed a patent application in 1986-5449.
No. 0:; Accordingly, when a plurality of transmissive screen units are arranged adjacently in the vertical and/or horizontal direction on the same plane or curved surface of the same circular arc to form one large screen screen, A large-screen transmission screen is constructed by providing close to the screen a triangular prism or triangular girder having an apex angle less than or equal to the angle of the blind spot in the blind spot of the light rays incident on the joint of the screen to support the screen. I created a way to do it.

However, in order to eliminate any seams in the screen, it is necessary to create a screen frame using triangular prisms or triangular girders, and to connect these triangular prisms or triangular girders firmly within the blind area, so the structure is Since there may be some difficulty in this, from the viewpoint that it is ideal that the impression of the seam should not be completely eliminated, but that it should be practically no impression at all.
The present invention was created as a result of various studies regarding assembly methods.

Means for Solving the Problems The outline of the present invention is that when a plurality of transmission screen units are continuously arranged on the same plane or curved surface of the same circular arc to form a multi-screen, from the projector side to each screen unit. Providing pillars and/or girders close to the screen to support the screen within the blind spot of the projected light beam,
A large screen characterized in that a thin plate metal fitting is interposed in all or part of the thickness direction of adjacent transmission screens, and the end faces of the screens are connected and supported by screwing to pillars and/or girders. This is how the screen is constructed.

To implement this, a metal plate holder is inserted between the joints of the transparent screen units, and this is held by screwing to the columns and/or girders provided on the sides of the transparent screen and in the blind area. In addition, the thickness of the metal plate holder on one side of the adjacent transmission screen unit is such that the thickness of the Fresnel lens portion is shortened.

In order to insert the metal plate holder into this, the metal plate holder is held by being screwed to a square column and/or a square girder provided in the side surface and blind area of the Fresnel lens.

The present invention will be explained below with reference to the drawings.

FIG. 1 shows a case in which two transmission screen units A1 and A are connected in a straight line in the horizontal direction on the same plane.

In this case, the projector, ,L, is capable of sending a partial image to each screen unit, A, ,A,.

The symbols in the figure indicate the following.

01.0. : Projector L1+L! projection lenses c, ,c,
,a,: End position zlz of the transmission screen unit A1゜A,: Passing through point c0, 01AU, O, AUI:l
- Parallel line W: Width of transmission screen unit A15A2 AU: Representative position of the viewer 2α: Blind space and projection angle on the projector side 2r: Viewer angle of AU P: Projection distance D: @Viewing distance Ta: Column Therefore, if a pillar is installed at the installation part molecule a of the pillar shown in this figure, the screen can be supported without visually appealing the existence of the pillar at the joint of the transmissive screen units.

FIG. 2 shows a case where 42 transmissive screen units A*@A are connected in a straight line in the vertical direction on the same plane.

In this case, the projector LM*L4 is adapted to be able to send partial images to the respective screen units A, , A, respectively.

〇□1+011: Projection lens C-1 of the projector, L,
wC@ *C1! : Transparent dust screen unit A
I.

Position of the end of A, z11z1! :C0 point O,, AU, Ol,
AU4:S Parallel line H: Transmissive screen unit A, height of A4 AU: Representative position of the viewer 2β: Blind spot space and projection angle P2 on the projector side Projection distance D = Viewing distance Tb: Installation of girder If pillars are installed at the section (t) of the girder installation section shown in this figure, the screen can be supported without visually appealing the presence of the girders at the joints of the transmissive screen units.

Also, FIG. 3 shows transmission type screen units A,,A! The centers of the two images are located in the same arc (radius D) from the representative viewer's position AU.
) Arrange the projectors on top of each other, L,
The case is shown in which the projection is performed at a projection distance P from .

o,, o,: Projection lens C1eC of projector L1, L,
@sCI: End position 2, . 2□: Line connecting 06AU W: Width of the transmissive screen unit α: Half-angle of the projection light flux r: Half the angle of the screen unit from the viewer (α
+γ): Blind spot P at the joint on the projector side: Projection distance D = Viewing distance TC: Installation area of the pillar Therefore, if the pillar is installed at the installation part c of the pillar shown in this figure, the pillar at the joint of the transmissive screen unit It is possible to support the screen without visually appealing the presence of the screen.

As described above, the present invention provides pillars or girders close to the screen in the blind spot, and also uses a thin sheet metal fitting, that is, a metal plate holder, for connection.

Example Next, an example thereof will be explained.

FIG. 4 is a perspective view showing the assembly stage of the embodiment of the present invention.
A combination of Kano 1 and IQ-2 is provided.

The metal plate holder 13& is screwed 14 to the end face of the transparent screen unit A and the pillar 10-1 to be integrated, and similarly the metal plate holder 13t) is screwed to the end face of the transparent screen unit A and the pillar 1 to 2. (not shown) and are integrated.

At this time, the metal plate holders 13& and 13b are arranged alternately in the longitudinal direction of the column, so that when they are combined, only the thickness of the metal plate holder appears at the joint, and the column is completely within the blind spot. It is something.

Further, the pillars 10-1 and 10-2 are fixed together by inserting bolts into the bolt holes 15. Since the thickness of the metal plate holder is only a few pieces or less, the effect on the field of view is extremely small.

FIG. 5 is a cross-sectional view of another embodiment of the present invention, in which the transmission screen unit A1wA! The lenticular lens part As
-Re A! -R are in contact with the end faces of each other, and the Fresnel lens portion A1-P t A! -p has one screen side (8!-F in the figure) made shorter by the thickness of the metal plate boulder 13, and pillars 10-1 and 10-2 are placed within the projection blind spot, that is, within the limit of the projection light flux (within the blind spot). , and the end faces and pillars of the Fresnel lens are alternately A, A, and A, according to the previous figure, Figure 6.
−? and U 10-1 , Ax -F and CF10-2
A plurality of metal holders 13 are screwed to support the pillars IQ-1 and 16, respectively.
10-2 are connected and integrated to support the screen.

In this way, the pillar is within the blind spot of the projection light beam, so it does not obstruct vision, and the end face of the metal plate holder is traced by a lenticular lens, and usually this metal plate itself is also in the blind spot. This is not a problem because the screws used to fix the metal plate may slightly block the projection light, but since the projected area relative to the field of view is extremely small, the effect on the projection luminous flux is very small and almost no problem. However, the seams are not noticed.

Furthermore, as shown in FIG. 6, a transmission type screen unit AI,
The connection end surface of A is formed on a slope according to the projection blind spot, and a V-shaped metal fitting 13 having an apex angle equal to the blind spot is screwed (for example, a stud screw) 14 to each screen, and a If the screws 14 are also screwed to the pillars 10, the thickness of the metal fittings 13 will not appear in the visual field at all, and there will be no need to be aware of the boundaries of the screen units.

The relationship between the screen and the pillars has been described above, but the relationship between the screen and the girder is also the same.

Columns and girders can be made of aluminum, steel, etc.

They can be fixed and integrated with each other by various fixing means such as adhesion, welding, fitting, five-shaped fittings, and bolting. However, in multi-screens that are arranged vertically and horizontally, the pillars are usually made up of a single piece that is not connected, and the girder used in the horizontal direction may be a single piece that meshes with the pillar, but the width of each screen unit It is possible to maintain sufficient strength even if these short lengths are connected.

Note that the shape of the pillars may be arbitrary, such as a combination type within the projection blind spot, considering the significance of the present invention, and the manner of attaching the metal plate holder is of course arbitrary.

To describe an actual example of the present invention, a transmissive screen unit with a width of 12,700 m and a vertical height of 2,000 m was made, and a total of 9 sheets, 3 each in the vertical and horizontal directions, were combined, and the width was 8,10 m.
A case will be described in which an ff/L/descreen with a vertical height of 0 m and a vertical height of 6.000111 W is configured. In this case, for example, a lenticular diffusion surface with a thickness of about 3 to 4 meters is placed on the side facing the audience, and a Fresnel lens with a thickness of about 8 to 9 meters is placed on the back side.

Pillars and girders of the same size are combined into a picture frame lattice shape, and a metal plate holder is used to integrate them with the end face of the screen and the pillars or girders using fixing means such as gluing or screwing using the method described above to form a multi-screen. As a result of projection, we were able to project an image with almost no awareness of boundaries.

Effects of the Invention According to the present invention, the support columns or supports are placed within the projection blind spot of the transmission screen unit, and a thin metal plate holder is used to connect the transmission screen unit and the support columns or supports. Since the beams are connected and integrated, it is relatively easy to work on the construction, and at worst the thickness of the metal plate holder will be visible on the viewing side, which is almost an eyesore in the field of view. It is not an existence.

Therefore, from the viewer's perspective, the seams are hardly noticeable.

You can watch images without getting tired, you can perform projection procedures while exchanging emotions with the audience, and you can show fast-moving images using cinematic techniques without feeling uncomfortable. be.

[Brief explanation of drawings]

Figure 1 is a top view of the screen units arranged in a straight line in the horizontal direction, and Figure 2 is a top view of the screen units arranged in a straight line in the vertical direction.
: Side view when the screen units are arranged side by side. Figure 3 is a top view when the screen units are arranged at the same distance from the viewer's position. The fourth factor is the image immediately before assembly of an embodiment of the present invention. FIG. 5 is a cross-sectional view showing another embodiment of the present invention, and FIG. 6 is a cross-sectional view showing another embodiment of the present invention. Rod 7Gj and bN Kaya Ri゛ Q + 19 Kidney M No type Movie also 2 Line σtsu Tsutsu Saihi (Tsu Rii Kenmen 1) De・h U. Agent Patent attorney Mamoru Takeuchi No. 1 No. 2 Figure 3 Figure 4 Figure 5

Claims (2)

[Claims] (1) When forming a multi-screen by arranging multiple transmissive screen units consecutively on the same plane or an arcuate curved surface, the screen is supported within the blind spot of the projected light beam from the projector side for each screen unit. The pillars and/or girders are provided close to the screen, and a thin sheet metal fitting is interposed in all or part of the thickness direction of the adjacent transparent lid screen, and the end face of the screen is connected to the pillars and/or girders by screwing. A method of constructing a transmission type screen for a large screen, characterized in that it is supported by (2) Method for constructing a transmission screen for a large screen according to claim 1, in which the pillars or girders have a polygonal cross section and are a combination of one or two pillars or girders.