JPH0416892A - Multiple image plane screen - Google Patents

Abstract

PURPOSE:To minimize the shadow of a screen fitting member seen at joins of images between unit screens by using two members, which are divided functionally as a fitting member for supporting the weight of the screen when the screen is fitted and a member for bringing the screen into contact with a screen side, as a means for fitting the screen. CONSTITUTION:This screen is equipped with rods 5 - 7 for supporting the weight of the screen 4 so that adjacent images do not overlap with one another. Then the rods 5 - 7 are inserted into holes 8 - 10 bored in a transparent plate 3 to support the weight of the screen. Further, wire materials 11 and 12 are run through small holes 15 and 16 bored in the transparent plate 3 and pulled by spring 13 and 14 to bring the screen 4 into contact with the transparent plate 3. The wire materials 11 and 12 may be formed of one looped wire material. Consequently, the shadow of the screen fitting member can be minimized not to mention the shadow of the screen 4 formed at border parts between respective image planes of the multiple image plane screen.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is directed to a rear projection screen having two or more optical projection means. The present invention relates to a method of attaching a screen between unit screens provided for the purpose of preventing images corresponding to the screens from overlapping.

[Conventional technology]

As described in Japanese Unexamined Patent Publication No. 1-88531, adhesives, screws, etc. have conventionally been used as means for attaching screens provided for the purpose of preventing images corresponding to adjacent unit screens from overlapping. Although efforts have been made to minimize the shadow of the screen, there is a drawback that the shadow of the screen mounting member appears on the screen.

[Problem to be solved by the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a multi-screen screen that can minimize the shadow of a screen mounting member that is visible next to images between unit screens.

[Failure to solve the problem]

In order to achieve the above object, in the present invention, as a means for attaching the screen, the WI stand is sometimes attached with an attachment member to support its own weight, and the screen is sometimes attached with a member that tightly stacks the screen on the screen side. By using two parts with separate functions, the shadow of each part was minimized.

[Effect]

For that purpose, the members that support the weight of the screen need to have a strong bending strength, so they are thick. Further, the material for closely layering the screen on the screen side needs to have strong tensile strength due to its purpose, and a material such as a thin wire can be used.

Therefore, the shadow will be reduced by placing the member that supports the weight of the screen as far away from the screen as possible, or by placing it perpendicular to the screen. Moreover, the shadow of the wire rod that brings the screen into close contact with the screen is reduced by placing it horizontally near the boundary line where the screens are stacked in multiple stages.

Shadows can be minimized by using members with separate functions in this way.

〔Example〕

An embodiment of the present invention will be explained below with reference to FIG. In the figure, reference numeral 1.2 indicates a screen for each screen, and reference numeral 3 indicates a transparent plate for supporting the screens stacked in multiple stages. The method of holding the screen is not relevant to the present invention and will therefore be omitted. 4 is a screen used to prevent adjacent images from overlapping each other, and 5°6.7 is a bar used to support the weight of the screen.

The weight of the screen is supported by inserting rods 5, 6° 7 into holes 8, 9 and 10 made in the transparent plate 3. 11° and 12 are wire rods, and 15 and 14 are spring materials. Pass the wire rod 11.12 through the small hole 15.16 made in the transparent plate 3, and attach the spring 13.14.
By pulling the screen 4, the screen 4 comes into close contact with the transparent plate 3.

The wire rods 11 and 12 may be made into a loop and made into a single wire rod.

FIG. 2 is a sectional view of the hole 8 in FIG. 1.

As an example of the present invention, a case is shown in which the hole 8 does not penetrate through the transparent plate 5, and a case in which the tip of the rod 5 is tapered is shown. As shown in FIG. 2, light 17 from the optical projection means for projecting the image on the upper screen and light 18 from the optical projection means for projecting the image on the lower screen are connected to each other.
By designing it to be on the boundary of J-/1.2, the shadows of the screen 4 and the screen mounting members 5 to 7 can be minimized. In addition, wire rod 1, which is another screen mounting member,
For 1.12, stainless steel wire or the like can be used, and since the wire diameter is small (about 13 cm), the shadow is sufficiently hidden in the boundary part of the screen 1°2.

In addition, in Figure @1, in order to simplify the explanation, the bars that support the weight of the screen and the wire rods that bring the screen into close contact with the screen are shown using several rods, but the spacing and number of rods may be freely selected. Although we have explained the screen in the horizontal direction, it goes without saying that the same idea can be applied to the vertical direction as well.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to minimize not only the shadow of the screen that appears at the boundary between each screen of a multi-screen, but also the shadow of the screen mounting member.
This has the effect of making multiple screens look like one large screen.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
FIG. 3 is a sectional view showing details of the main part of the figure. Explanation of symbols 1.2... Screen, 5... Transparent plate, 4... Screen, 5.6.7... Screen support rod, 8, 9.10...
Insertion hole, 11.12...Wire rod, 1!5.14...Spring material, 15. L6°°° small hole, 17, 18... rays.

Claims (1)

[Claims] 1. A multi-screen formed by joining together unit screens to form a multi-screen, and projecting each image projected from a plurality of optical projection means onto a corresponding one of the unit screens. In order to prevent adjacent images that are projected from different optical projection means and are adjacent to each other on the screen from being displayed overlapping each other, a screen supporting member is provided near the boundary between the unit screens. The means for attaching the screen member to be attached includes a first means for supporting the weight of the screen member during attachment, and a second means for bringing the screen member into close contact with the direction of the screen during attachment.
A multi-screen screen characterized by using the above means. 2. The multi-screen screen according to claim 1, wherein the screen support member is made of a transparent plate, and the first
The means comprises a rod-shaped member that holds the screen member and is inserted into a hole made in the transparent plate, and the second means holds the screen member through the hole made in the transparent plate. A multi-screen screen comprising a wire rod and a spring member that are held in close contact with the transparent plate.