JPH11202415A - Structure of border parts between unit screens of multivision display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress a shift of a display image at the border part between unit screens of the multivision display. SOLUTION: The screen surface is constituted by arraying unit screens 2A and 2B irradiated with the projection light from a projection unit 6. Between opposite end edges of the adjacent unit screens 2A and 2B, a light-shielding interposing member 8 for restricting the end edges in the screen surface normal direction is arranged extending along the end edges. The interposing member 8 is a sponge material which is pushed and compressed by the opposite end edges of the adjacent unit screens 2A and 2B. Then the interposing member 8 is joined with the end edge of at least one of the adjacent unit screens 2A and 2B.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the technical field of image display, and more particularly to the structure of a boundary between unit screens of a multi-vision display.

[0002]

2. Description of the Related Art
Divide the screen into multiple (partitions) to display a large screen
In addition, there has been proposed a type in which a required image light is projected from an independent projection unit on each divided screen to display one image as the entire screen (Japanese Patent Application Laid-Open Nos. 5-300460 and 6-59340). Gazette, JP-A-6-753
No. 00, JP-A-7-270914 and JP-A-8
-122924). Such a large screen display is often called a multi-vision display.

In a multi-vision display, a plurality of unit screens are generally used, and the unit screens are arranged in a plane to form one screen surface as a whole. At least one split screen is formed on each unit screen. Also, each unit screen is attached to the unit frame to which the projection unit is attached,
Unit frames with such a unit screen are appropriately arranged.

Meanwhile, in the conventional multi-vision display, each unit screen is provided with a holding frame all around, and at least a part of the holding frame is fixed to the unit frame. For this reason, the error of the arrangement of the unit frames, the mounting error of the unit screen holding frame with respect to each unit frame and the mounting error of the unit screen with respect to the holding frame are accumulated, or the error occurs due to aging, Opposite edges of adjacent unit screens may be shifted, for example, in the normal direction of the screen surface. In this case, when the image display screen is observed, an image shift at the boundary between the unit screens is recognized, and the quality of the displayed image is degraded.

SUMMARY OF THE INVENTION It is an object of the present invention to suppress occurrence of a shift of a display image at a boundary between unit screens in a multi-vision display.

[0006]

According to the present invention, in order to achieve the above object, a screen surface is formed by arranging a plurality of unit screens to which projection light from at least one projection unit is irradiated. A structure of a boundary between the unit screens in a multi-vision display, wherein an intervening member is provided between opposing edges of adjacent unit screens for restraining the edges with respect to a screen surface normal direction. Are arranged to extend along the opposite edge,
The structure of the boundary between the unit screens of the multi-vision display is provided.

In one embodiment of the present invention, the intervening member has a light-shielding property.

In one embodiment of the present invention, the intervening member is pressed and compressed by opposing edges of adjacent unit screens.

[0009] In one embodiment of the present invention, the intervening member has a sponge shape.

In one embodiment of the present invention, the interposed member is joined to at least one edge of the two adjacent unit screens.

In one embodiment of the present invention, the intervening member grips each edge of the two adjacent unit screens with a pair of grips.

In one embodiment of the present invention, the intervening member is provided with a light-blocking fin that protrudes toward the projection unit side of the screen surface and extends along the opposite edge.

In one embodiment of the present invention, the unit screen is mounted on a unit frame having at least one projection unit mounted thereon, and the unit frames are connected to each other to form the adjacent unit screen. The edges are arranged to face each other via the intervening member.

[0014]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic exploded perspective view showing a first embodiment of a structure of a boundary portion between unit screens of a multi-vision display according to the present invention, and FIG. 2 is a sectional view thereof.

In FIG. 1, a first unit screen 2A
Is attached to the first unit frame 4A. Similarly, the second unit screen 2B is the second unit frame 4
B attached.

The unit screen 2A has a rectangular shape, has four image display areas a, b, c, and d, and three sides (upper side, lower side and left side in FIG. 1) of four sides on the outer periphery thereof. Is provided with a holding frame e. The holding frame e is attached to the unit frame 4 by an attachment means (not shown) (for example, screws).
A is attached. The remaining one side (the right side in FIG. 1) of the four sides on the outer periphery of the unit screen 2A is not provided with a holding frame.

The unit frame 4A is composed of the unit screen 2A
Has four parts corresponding to the image display areas a, b, c, and d of each of the above. Each part has a projection unit for projecting a desired image light onto the corresponding image display area of the unit screen 2A. 6 (only those corresponding to the image display area a are shown).

In the unit screen 2A, as shown in FIG. 2, a Fresnel lens sheet 12 is disposed on the projection unit 6 side (light source side), and a lenticular lens sheet 14 is disposed on the opposite side (observation side). Consisting of The Fresnel lens sheet 12 and the lenticular lens sheet 14 may be joined to each other or may be simply overlapped. The Fresnel lens sheet 12 has a Fresnel lens shape (only the image display area a is shown) for each of the image display areas a, b, c, and d.
Reference numeral 4 denotes a lenticular lens shape formed uniformly over the entire image display areas a, b, c, and d.

The unit screen 2A and the unit frame 4A have been described above, but the unit screen 2B and the unit frame 4B have the same configuration. However, one of the four sides of the outer periphery of the unit screen 2B without the holding frame is the left side facing the right side of the unit screen 2A without the holding frame.

An intervening member 8 is arranged between the right edge of the unit screen 2A without the holding frame and the left edge of the unit screen 2B without the holding frame. In the present embodiment, the intervening member 8 is a member having a compressibility (for example, a sponge-like member), and is colored in a dark color such as black to have a light shielding property.
The intervening member 8 is pressed and compressed by the right edge of the unit screen 2A and the left edge of the unit screen 2B. Such pressing and compression of the interposition member 8 can be realized by connecting the unit frame members 4A and 4B with each other by means (not shown) (for example, bolts).
The intervening member 8 may be joined to the right edge of the unit screen 2A or the left edge of the unit screen 2B or both using an appropriate adhesive.

In the structure of the boundary between the unit screens of the present embodiment as described above, the right edge of the unit screen 2A and the left edge of the unit screen 2B opposed to each other via the interposition member 8 are formed. The relative position with respect to the normal direction of the screen surface (the vertical direction in FIG. 2) is determined by the frictional force between the interposed member 8 and the edge of the unit screen and the interposed member protruding from between the opposing unit screen edges shown in FIG. Since the image is formed on the unit screen on both sides of the boundary due to the restraining force of the bulging portion, the image hardly shifts, and the image quality is good.

FIG. 3 is a sectional view showing a second embodiment of the structure of the boundary between the unit screens of the multi-vision display according to the present invention. In this figure, FIGS.
Members having the same functions as those in are denoted by the same reference numerals.

This embodiment differs from the first embodiment only in that another intervening member 8 'is used in place of the intervening member 8.

The intervening member 8 'is made of a resilient member, for example, plastic, is colored in a dark color such as black, has a light-shielding property, and has a first holding portion 8a for holding the edge of the unit screen 2A. A second grip portion 8b for gripping an edge of the unit screen 2B. These grips 8a, 8b
Of the two unit screen edges is performed with an urging force (that is, by pressing in the normal direction of the screen surface).

The intervening member 8 'is provided with a light-shielding fin 8c projecting toward the projection unit in the direction normal to the screen surface. The light-shielding fins 8c extend along opposing edges of the two unit screens (ie, in a direction perpendicular to the plane of FIG. 3).

In the structure of the boundary between the unit screens of the present embodiment as described above, the right edge of the unit screen 2A and the left edge of the unit screen 2B opposed to each other via the interposition member 8 ' Relative to the screen surface normal direction (vertical direction in FIG. 3)
Since the holding portions 8a and 8b of the intervening member 8 'are restrained by the holding force, the images formed on the unit screen on both sides of the boundary are less likely to be displaced, and the image quality is good.

Further, according to the present embodiment, the light shielding fin 8
c, the projection light from the projection unit 6 attached to the unit frame 4A
This prevents inconvenience that the projection light protrudes into B and the projection light from the projection unit 6 attached to the unit frame 4B protrudes and enters the unit screen 2A.

In the above embodiment, the unit screen 2A,
2B is composed of a Fresnel lens sheet 12 and a lenticular lens sheet 14,
In the present invention, the unit screen may include a Fresnel lens sheet, a lenticular lens sheet, and a protective front plate disposed adjacent to the lenticular lens sheet.

[0030]

As described above, according to the present invention,
Since an intervening member is arranged between the opposing edges of the adjacent unit screens and the edges are constrained in the normal direction of the screen surface, the displacement of the display image at the boundary between the unit screens is reduced. Generation can be suppressed, and the quality of a displayed image can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic exploded perspective view showing a first embodiment of a structure of a boundary portion between unit screens of a multi-vision display according to the present invention.

FIG. 2 is a cross-sectional view illustrating a structure of a boundary portion between unit screens of a multi-vision display according to a first embodiment of the present invention;

FIG. 3 is a sectional view illustrating a structure of a boundary portion between unit screens of a multi-vision display according to a second embodiment of the present invention;

[Explanation of symbols]

 2A, 2B Unit screen 4A, 4B Unit frame 6 Projection unit 8, 8 'Interposed member 8a, 8b Grip portion 8c Light-blocking fin 12 Fresnel lens sheet 14 Lenticular lens sheet a, b, c, d Image display area e Holding frame

Claims (8)

[Claims] 1. A structure of a boundary between unit screens in a multi-vision display in which a plurality of unit screens to be irradiated with projection light from at least one projection unit are arranged to form a screen surface, wherein the unit screens are adjacent to each other. An intervening member for constraining the edges in the normal direction of the screen surface is provided between the opposing edges of the unit screen so as to extend along the opposing edges. The structure of the boundary between unit screens of a multi-vision display. 2. The structure of a boundary between unit screens of a multi-vision display according to claim 1, wherein the intervening member has a light shielding property. 3. The unit screens of a multi-vision display according to claim 1, wherein the interposed member is pressed and compressed by opposing edges of adjacent unit screens. Border structure. 4. The structure according to claim 3, wherein the intervening member has a sponge shape. 5. The multi-vision display according to claim 1, wherein the interposed member is joined to at least one edge of the two adjacent unit screens. The structure of the boundary between unit screens. 6. The multi-unit according to claim 1, wherein the intervening member grips each edge of the two adjacent unit screens with a pair of grips. The structure of the boundary between the unit screens of the vision display. 7. The light-shielding fin according to claim 6, wherein the intervening member is provided with a light-shielding fin that projects toward the projection unit side of the screen surface and extends along the opposed edge. Structure of the boundary between the unit screens of the described multi-vision display. 8. The unit screen is attached to a unit frame to which at least one projection unit is attached, and the edges of the adjacent unit screens are connected to each other by connecting the unit frames. The structure of a boundary between unit screens of a multi-vision display according to any one of claims 1 to 7, wherein the unit screens are arranged to face each other via a member.