JPH0829877A - Screen unit and multiplane screen - Google Patents

Abstract

PURPOSE:To make a joint part thin and to easily carry in/out a screen. CONSTITUTION:This screen unit is provided with the group of screen sheets 11 and 12 plurally superposed in the optical axis direction and including a 1st screen sheet arranged at the end of the observation side and a 2nd screen sheet arranged at the end of the light source side, a flange member 41 made of a transparent material and provided at the end on the outer surface side of the 1st screen sheet and a thin and strong plate member 31 bonded on the end faces of the 2nd screen sheet and the flange member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screen unit in which a plurality of screen sheets are superposed in the optical axis direction and a multi-sided screen in which a plurality of them are arranged on an image surface to increase the size.

[0002]

2. Description of the Related Art A transmissive projection system is a system for observing an image projected from the rear through a transmissive projection screen. Since a high-contrast image with high visibility can be obtained and the size can be easily increased, Recently, it has been widely used as a system for displaying a large image of 40 inches or more.

Further, in the multi-plane projection system, a plurality of the above-mentioned transmissive projection systems are arranged on the image plane and a plurality of screens can be displayed or one large screen can be displayed. Many are attracting attention as a system that can display various information on multiple screens.

In order to display a high quality image, the above-mentioned transmission type projection system is generally used as a screen by stacking two or more screen sheets having different functions in the optical axis direction. As the screen sheet, for example, a Fresnel lens sheet that changes the traveling direction of light and a lenticular lens sheet that diffuses light are often stacked.

Further, in the case where the screen of the multi-plane projection system is composed of a plurality of sheets, in the prior art, the screen and the projector constituting the system are put in one box and these are stacked. ,
A multi-sided screen with the screens joined at the end faces,
A method of projecting images from a plurality of projectors arranged on a plane is used.

[0006]

However, in the above-mentioned method, since the screen and the projector are put in the box and stacked, the box is required to have a considerable strength.
Therefore, even if the member forming the box body is made of metal such as iron, it is difficult to reduce the thickness to 1 mm or less. Also,
There must be a gap between the screen and the box that allows the screen to expand and contract due to changes in humidity. The gap is, for example, at least 2 mm, depending on the size of the screen.
Degree is necessary. Therefore, there is a problem in that a joint portion that cannot display an image is formed between adjacent screens by 6 mm or more.

According to the method of (1), the connecting portion can be made thin, but the screen is joined and becomes large. If the size of the joined screen becomes larger than 120 inches, it will not be possible to carry it in and out of the building, and it will be impossible to install the screen.
There was a problem that it required a great deal of expense and construction period.

In order to obtain a high-contrast image, a lens sheet having a lens shape for condensing light on the incident side and a light absorbing portion on the light emitting side is used as a screen sheet on the most observing side ( Lenticular lens sheet with black stripe) is often used. In this lens sheet, in order to transmit the image light, the light exit surface must be arranged near the light condensing point of the light entrance side lens, so there is a correlation between the pitch of the light entrance side lens and the sheet thickness. However, if the pitch is made fine, the thickness of the sheet becomes thin. Therefore, there is a problem in that the flatness cannot be maintained when the size is increased by joining.

The object of the present invention is to solve the above-mentioned problems,
(EN) Provided is a screen unit and a multi-sided screen which have a thin connecting portion and can be easily carried in and out.

[0010]

In order to solve the above-mentioned problems, the invention of claim 1 is such that a plurality of sheets are stacked in the optical axis direction and are arranged at the end on the first side in the optical axis direction. A screen sheet and a screen sheet group including a second screen sheet arranged at an end on the second side, and a flange member made of a transparent material provided at an end portion on the outer surface side of the first screen sheet, A thin and strong plate-like member joined to the end surface of the second screen sheet and the end surface of the flange member.

According to a second aspect of the present invention, in the screen unit according to the first aspect, the plate-like member projects toward the light source.

The invention according to claim 3 is claim 1 or claim 2.
In the screen unit according to claim 1, forming a light-absorbing layer on a part of the flange member, or by joining the flange member and the plate-like member via a light-absorbing member, the most observing side The image light that does not pass through the screen sheet is blocked.

According to a fourth aspect of the present invention, in the screen unit according to any one of the first to third aspects, a light diffusion layer is formed on a part of the flange member, or
By joining the flange member and the plate-like member via a member having a light diffusing property, the image light that does not pass through the screen sheet closest to the observation side is diffused.

According to a fifth aspect of the present invention, in the screen unit according to any one of the first to fourth aspects, the flange member is provided with an antireflection layer for reducing reflectance on the surface thereof. It is characterized by

The invention according to claim 6 is characterized in that a plurality of screen units according to claims 1 to 5 are arranged on an image plane.

[0016]

According to the present invention, a screen unit is formed by stacking a plurality of screen sheets in the direction of the optical axis, and each screen sheet can be held without inserting other members in the image plane. You can get the mold screen. Also, carry-in in screen unit units
Since it can be carried out, it is easy to install a multi-sided screen.

[0017]

【Example】

(First Embodiment) Hereinafter, the embodiments will be described in more detail with reference to the drawings. FIG. 1 is a perspective view showing a first embodiment of a screen unit according to the present invention. Note that, in each of the embodiments described below, parts having the same function are denoted by the same reference numerals, and redundant description will be appropriately omitted. The screen unit 10 is composed of two screen sheets 11 and 12. As described above, when the screen unit is composed of a plurality of screen sheets, it is necessary to closely contact the peripheral portions of the sheets or to keep the sheets at a predetermined distance so as not to separate the sheets.

Therefore, in this embodiment, the thin and strong plate-like member 31 is joined to the screen sheet 12 on the light incident side, and the transparent flange member 41 is joined thereto, so that the screen sheets 11 and 12 are left and right. It is held so that it sticks at the edges. Plate-shaped member 31 and screen sheet 1
The bonding with the 2 or the flange member 41 or the bonding between the screen units may be performed with an adhesive such as a cyanoacrylate-based, epoxy-based or acrylic-based adhesive, and the thickness thereof may be about 0.02 mm. Further, in the vertical direction, the portion outside the effective area of the screen is pasted with double-sided tape.

As the plate-like member 31, a metal such as iron, stainless steel or the like molded to a thickness of about 0.1 mm may be used. Here, the screen sheets 11 and 12 and the like are usually formed of a synthetic resin such as acrylic resin, and their expansion coefficients are close to each other, so that there is a gap between the plate-shaped member 31 and the screen sheet 11. It is not necessary to provide a large gap, and if the materials are the same, there is almost no need to provide a gap. In this embodiment, the gap can be reduced to one fifth to one tenth as compared with the case where the gap is placed in the metal box body.

That is, the gap between the plate member 31 and the screen sheet 11 may be small, and the screen sheet 11 is made of acrylic resin and has a size of about 100 inches, although it depends on the material and size of the screen sheet. Even if it is big,
It may be about 0.1 mm. Therefore, in this embodiment, the joint portion where the image cannot be displayed can be made very thin, about 0.5 mm.

By suspending the screen unit 10 by using the tops 51 and 52 provided on the upper portion thereof, a multi-sided screen 20 in which a plurality of the screen units 10 are arranged in one plane can be obtained.

FIG. 2 is a perspective view showing an embodiment of a multi-sided screen according to the present invention. Screen unit 10
A and 10B are joined by the outer surfaces of the plate members 31A and 31B. Here, in order to simplify the explanation,
Although only the upper hanging structure is illustrated, the left and right sides and the lower sides of the screen sheets 11 and 12 may be held by a U-shaped frame structure or the like.

When the multi-faced screen 20 of this embodiment is installed, it is not necessary to carry the joined screens, and the screen units 10A and 10B may be brought to the site and joined. As described above, the multi-sided screen 20 according to this embodiment includes the screen units 10A and 10B.
Since it can be carried in and installed separately, even in a building with a narrow carry-in entrance, it can be easily installed by dividing the multi-sided screen 20 into the screen units 10A and 10B. In addition, the screen units 10A, 10
B can be arranged so as to face each other, and the connecting portion between the units can be made thin.

(Second Embodiment) FIG. 3 is a perspective view showing a second embodiment of the screen unit according to the present invention. The screen unit of the second embodiment includes screen sheets 11A and 11B and screen sheets 12A and 1B.
The second embodiment is the same as the first embodiment except that the screen sheets 11 and 12 are formed by stacking 2B on top and bottom and adhering the end faces.

As described above, the screen unit of this embodiment has a structure in which the screen sheets are adhered at the end faces and the vertically arranged ones are stacked in the optical axis direction. Can be easily manufactured. It is not necessary that all of the screen sheets that form the screen unit are adhered at the end faces. For example, the screen sheet 11 is one long sheet, and only the screen sheet 12 is the sheet 1.
2A, 12B may be adhered at the end faces.

(Third Embodiment) FIG. 4 is a perspective view showing a third embodiment of the screen unit according to the present invention. When the screen sheet is used by adhering at the end surface,
If the number of layers stacked vertically is increased to 3 or 4, or the screen sheet is thin, sufficient adhesive strength may not be obtained. Therefore, in the screen unit of the third embodiment, the transparent substrate 13 is arranged on the light-incident side of the screen sheets 11 and 12, and the plate-like member 31 is joined to the transparent substrate 13, so that the multi-stage screen having high strength is used. Units can be made.

(Fourth Embodiment) FIG. 5 is a perspective view showing a fourth embodiment of the screen unit according to the present invention. The plate-like member 31 of the fourth embodiment is the same as that of the first embodiment except that the plate-like member 31 projects longer than the screen unit 10 toward the light entrance surface.

In the multi-sided screen, corresponding projectors are arranged on the respective surfaces, and only the projection light of the corresponding projectors must be incident on the surface. Therefore, a partition plate is arranged at the boundary between the surfaces, that is, on the light-incident side of the connecting portion so that the projection light from the adjacent projector does not enter. In the fourth embodiment, since the plate member 31 projects from the end surface of the screen unit 10 toward the light incident side,
If the screen unit 10 is joined, the plate-like member 3
1 can function as a partition plate as it is.

FIG. 6 is a perspective view showing a method of fixing the screen unit to the pillar structure according to the fourth embodiment. When the plate-like member 31 of the fourth embodiment is joined to a column structure or the like separately installed on the incident side, the screen units can be arranged on the image surface without joining the screen units to each other. , The thickness of the connecting portion can be reduced. Also, the installation work of the screen becomes easier. When joined to a column structure or the like installed separately from the plate-like member 31, the screen sheet easily expands and contracts in the image plane direction, and becomes difficult to move in the direction perpendicular to the image plane. Even when the sheet expands or contracts, a good image can be obtained without warping or bending.

To join in this way, for example, as shown in FIG. 6, the tops 53 and 54 are attached to the plate-like member 31, and the tops 53 and 54 are attached by the L-shaped metal fittings 71A and 71B.
The column structure 81 is fixed so as not to separate. At this time,
It suffices to provide a clearance between the tops 53 and 54 and the L-shaped metal fittings 71A and 71B to meet the expansion and contraction of the screen unit. In the embodiment shown in FIG. 6, the left and right clearances 91, 92, 93 and 94 of the screen unit are set to correspond to the expansion and contraction of the screen unit, whereas the clearance 9 is set in the direction perpendicular to the screen unit.
5, 96 can be reduced to make it difficult to move. The screen sheet can freely expand and contract in the vertical direction.

(Fifth Embodiment) FIG. 7 is a view showing a fifth embodiment of the screen unit according to the present invention. As described above, in the transmission projection screen, the Fresnel lens sheet that changes the path of light is disposed on the light incident side, and the lenticular lens sheet that diffuses light is disposed on the light outgoing side in many cases. In this way, when the light-incident side sheet does not diffuse light and only the most observing side sheet diffuses light, the plate-like member 31 at the end of the screen unit and the most observing side screen sheet are There is a possibility that the image light is not diffused from the gap between the two and leaks to the observation side. Therefore, the fifth
In the embodiment described above, a good image is obtained even in such a case.

The screen unit of the fifth embodiment comprises a Fresnel lens sheet 100 and a lenticular lens sheet 110. For simplicity, only the cross section of the end of the screen unit is shown. The light 120 entering the end of the screen unit is bent by the Fresnel lens sheet 100 and becomes perpendicular to the screen, passes through the gap 130 between the lenticular lens sheet 110 and the plate-shaped member 31, and is observed. Reach

Therefore, in the fifth embodiment, a portion near the end face of the flange member 41 is used as a light absorbing portion 140 to block the light passing through the gap 130 so as not to reach the observation side. Here, the width of the light absorbing portion 140 is equal to the gap 1
It may be a little wider than the width of 30, and if the width of the gap is 0.2 mm as in the first embodiment, it may be about 0.3 mm. Therefore, when the screen units of this embodiment are arranged on the image plane, the width of the connecting portion is 0.7 m.
It will be about m.

(Sixth Embodiment) FIG. 8 is a view showing a sixth embodiment of the screen unit according to the present invention. Sixth
In the embodiment, the lenticular lens sheet 160 with a black stripe having a light absorbing portion 150 on a part of the light emitting surface is used as the lenticular lens sheet.
Therefore, it is possible to prevent the leakage of the image light without increasing the width of the connecting portion.

(Seventh Embodiment) FIG. 9 is a view showing a seventh embodiment of the screen unit according to the present invention. Seventh
In this embodiment, the image light is prevented from leaking, and the flange member 41 and the plate member 31 are joined via the light absorbing member 170. Here, the light absorbing member 1
70 is a flange member 41 which also serves as an adhesive layer.
You may make it join with the plate-shaped member 31.

Further, in order to prevent the influence of light passing through the gap 130, a light diffusing layer may be formed instead of the light absorbing layer, or a plate-like member 31 may be formed via a light diffusing member. You may join the transparent member 41. In this case, the light diffusion layer functions as a screen, so that an image is displayed on that portion as well, and the connecting portion where the image is not displayed does not become thick.

Here, the flange member 41 is made of acrylic,
A transparent resin such as polycarbonate may be used, but if the surface of the flange member 41 is coated with a substance having a low refractive index to reduce the reflectance or the surface is matted to prevent regular reflection, the flange member 41 becomes less noticeable.

The present invention is not limited to the embodiments described above, and various modifications and changes are possible, and these are also included in the present invention. For example, the plate-shaped member and the screen sheet may be joined using a double-sided tape instead of being mounted, so that the plate-shaped member and the flange member can be exchanged. Further, the screen units may not be arranged in the same plane but may be arranged so as to form an angle with each other.

[0039]

As described in detail above, according to the present invention, a screen unit is formed by stacking a plurality of screen sheets in the optical axis direction, and each screen sheet can be provided without inserting other members in the image plane. Since it can be held, it is possible to obtain a multifaceted screen with a thin connecting portion. Further, since loading and unloading can be performed in screen unit units, there is an effect that a multi-sided screen can be easily installed.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of a screen unit according to the present invention.

FIG. 2 is a perspective view showing an embodiment of a multi-sided screen according to the present invention.

FIG. 3 is a perspective view showing a second embodiment of the screen unit according to the present invention.

FIG. 4 is a perspective view showing a third embodiment of the screen unit according to the present invention.

FIG. 5 is a perspective view showing a fourth embodiment of the screen unit according to the present invention.

FIG. 6 is a perspective view showing a method of fixing a screen unit to a pillar structure according to a fourth embodiment.

FIG. 7 is a diagram showing a fifth embodiment of the screen unit according to the present invention.

FIG. 8 is a diagram showing a sixth embodiment of the screen unit according to the present invention.

FIG. 9 is a view showing a seventh embodiment of the screen unit according to the present invention.

[Explanation of symbols]

 10 screen unit 11, 12 screen sheet 20 multi-sided screen 31 plate member 41 flange member

Claims (6)

[Claims] 1. A first screen sheet and a second screen sheet, which are stacked on each other in the optical axis direction and arranged at the end on the first side in the optical axis direction and arranged at the end on the second side. A group of screen sheets, a flange member made of a transparent material provided on an outer surface side end portion of the first screen sheet, and a thin and joined end surface of the second screen sheet and an end surface of the flange member. A screen unit comprising: a strong plate member. 2. The screen unit according to claim 1, wherein the plate-shaped member projects toward the light source. 3. The screen unit according to claim 1, wherein a light absorbing layer is formed on a part of the flange member, or the flange member and the plate are interposed via a light absorbing member. The screen unit is characterized in that the image light that does not pass through the screen sheet closest to the observation side is blocked by joining the screen-shaped member. 4. The screen unit according to claim 1, wherein a light diffusing layer is formed on a part of the flange member, or a light diffusing member is interposed. A screen unit, characterized in that by joining the flange member and the plate-like member, image light that does not pass through the screen sheet closest to the viewing side is diffused. 5. The screen unit according to any one of claims 1 to 4, wherein the flange member has an antireflection layer formed on its surface to reduce the reflectance. Screen unit. 6. A multi-sided screen comprising a plurality of the screen units according to claim 1 arranged on an image surface.