JP2007127924A - Multi-screen display device - Google Patents

Abstract

Since a multi-screen display device is often used on a large screen, the image quality of an image is deteriorated unless a gap generated at a joint portion between a plurality of adjacent screens is reduced as much as possible. Further, since the screen expands and contracts due to environmental changes such as high and low temperatures and high humidity, there is a problem that a structure for absorbing the expansion and contraction is necessary.
A sheet material 13 made of material A and a sheet material 14 made of material B are bonded to end faces of a lenticular lens 11 and a Fresnel lens 12 constituting the screen 1 in order to make a large screen by adjoining a plurality of screens 1 to each other. Fix and hold to minimize seam gaps. Further, when fixing the sheet material 13 of the material A to the mounting frame 15, the screen 1 is expanded and contracted due to environmental changes such as high and low temperatures and high humidity by bonding and fixing with the slide fitting 22 and the double-sided tape 41 that follows the stress. Multi-screen display device provided with a device for absorbing light.
[Selection] Figure 3

Description

  The present invention relates to a multi-screen display device capable of displaying one large screen by a multi-screen in which a plurality of screens on which images from a projector are projected from the back side are arranged adjacent to each other.

  2. Description of the Related Art Conventionally, a multi-screen display device that displays a single large screen by arranging a plurality of devices in which a rear projection type projector and a screen are adjacent to each other is widely used. The problem here is the size of the joints formed at the joints between the screens when they are adjacent to each other. If the joints are large, the quality of the image is lost due to lack of necessary video information.

  In addition, the screen expands and contracts due to environmental changes such as high temperature and humidity, and when the screen expands, the screen deforms in a convex direction, and when the screen contracts, the gap between the screens widens. There was a structural defect of degrading the quality.

For this reason, the conventional multi-screen display device has a structure for narrowing the joint formed between the adjacent screens, or a structure that does not cause a problem even if the screen expands or contracts due to environmental changes. (For example, refer to Patent Document 1.)
FIG. 4 is an external view of the screen of the conventional multi-screen display device described in Patent Document 1. In FIG. 4, the screen 1 is held by a left-side screen holding unit 31, a bottom-side screen holding unit 32, a right-side screen holding unit 33, and an upper-side screen holding unit 34, and is fixed to an attachment frame 35.

FIG. 5 is a cross-sectional view taken along the cutting line BB shown in FIG. 4 and shows the internal structure of the screen 1. The end faces of the lenticular lens 11 and the Fresnel lens 12 constituting the screen 1 are attached to the holding parts of the left side screen holding part 31, the bottom side screen holding part 32, the right side screen holding part 33, and the upper side screen holding part 34, and double-sided adhesive tape. 41 is fixed. In addition, in order to prevent the screen 1 from falling off in the forward direction, each of the left side screen holding part 31, the bottom side screen holding part 32, the right side screen holding part 33, and the upper side screen holding part 34 is bent. Yes. This prevents the trouble that the screen 1 falls off even if the screen 1 expands and contracts due to a temperature change.
JP-A-6-317849

  In the configuration of the screen of the conventional multi-screen display device, in order to prevent the screen 1 from dropping due to expansion and contraction of the screen 1 due to temperature change, a left side screen holding unit 31, a bottom side screen holding unit 32, a right side screen holding unit 33, Each screen holding part of the upper side screen holding part 34 is bent. As a result, the joints 42 exist as shown in FIG. For this reason, there is a portion where the image projected from the projector is not reflected, and there is a problem that the appearance quality is impaired. In addition, each screen size of the conventional multi-screen display device is often equivalent to about 40 type, and when a large screen is constructed, it must be arranged in multiple rows and multiple columns, resulting in high initial costs and maintenance costs. It occurred and had the subject of putting a great burden on the user.

  The present invention solves the above-described problems, and improves the image quality by making the joint between adjacent screens thinner than before, and can reduce the cost by increasing the size of each screen of the multi-screen display device. Another object of the present invention is to provide a highly reliable multi-screen display device that does not fall off even if the screen expands or contracts due to environmental changes such as high temperature and high humidity.

  In order to solve the above-described conventional problem, the invention according to claim 1 of the present application is a multi-screen that displays one large screen by a multi-screen in which a plurality of screens on which images from a projector are projected from the back are arranged adjacent to each other. In the display device, a multi-screen display device is characterized in that a sheet material having a thin and high elastic property is bonded and fixed to an end face of the screen.

  The invention according to claim 2 is the multi-screen display device according to claim 1, wherein the sheet material is provided with a protrusion shape for each portion where the possibility of stress generation is high.

  According to a third aspect of the present invention, there is provided the multi-screen display according to the second aspect, wherein the mounting frame for holding the screen and the projection-shaped portion of the sheet material are connected and fixed via a metal fitting. Device.

  The invention according to claim 4 is the multi-screen display device according to claim 3, wherein the sheet material and the metal fitting are fixed by an adhesive member having a property of following a stress.

  According to a fifth aspect of the present invention, the connecting and fixing portion of the metal fitting has a slide structure, and the stress generated by environmental changes is absorbed by the connecting and fixing portion of the slide structure. A multi-screen display device as described.

  In the multi-screen display device according to the first aspect, the joint portion between the adjacent screens can be made thinner than the conventional one. In the multi-screen display device according to the second, third, and fourth aspects, the expansion and contraction of the screen due to environmental changes such as high temperature and humidity can be absorbed.

  As described above, in the multi-screen display device of the present invention, it is possible to improve the quality and appearance quality of the projected video.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

(Embodiment 1)
Although a screen to be used varies depending on performance and characteristics, a multi-screen display device using a two-screen structure will be described in the first embodiment.

  FIG. 1 is an external view of a screen of a multi-screen display device according to Embodiment 1 of the present invention. FIG. 2 shows the configuration of the screen in a front perspective view and a rear perspective view.

  As shown in FIG. 1 and FIG. 2, the screen 1 is configured by bonding two lenticular lenses 11 and Fresnel lenses 12 together. The sheet material 13 made of material A is fixed to the entire peripheral end surface of the lenticular lens 11 and is fixed to the mounting frame 15. The sheet material 14 of material B is fixed to the entire peripheral end surface of the Fresnel lens 12 and is fixed to the mounting frame 15.

  Here, the sheet material 13 made of the material A and the sheet material 14 made of the material B are thin and have a high elastic property, and the sheet material 13 made of the material A protrudes at each part where stress is likely to occur. The shape is given. Note that the material A and the material B of the sheet material 13 of the material A and the sheet material 14 of the material B are not necessarily different and may be the same.

  In a multi-screen display device in which screens having the structure shown in FIGS. 1 and 2 are arranged vertically and horizontally, the gap between the screens can be made narrower than before.

(Embodiment 2)
In the second embodiment of the present invention, a fixing means for absorbing expansion / contraction of the screen due to environmental changes such as high temperature and humidity is provided, and FIG. 3 shows the structure of the fixing means.

  FIG. 3 is a view showing a part of the end face of the screen 1 of FIG. 1, and is an enlarged view of the connecting and fixing portion of the sheet material 13 of material A, the sheet material 14 of material B, and the mounting frame 15 described in FIG. It is shown.

  In FIG. 3, the sheet material 14 of material B that is bonded and fixed to the entire peripheral end face of the Fresnel lens 12 is connected and fixed to the mounting frame 15, so that the Fresnel lens 12 is held by the mounting frame 15. Next, when the projection-shaped portion of the sheet material 13 made of material A that is bonded and fixed to the entire peripheral end surface of the lenticular lens 11 is connected and fixed to the mounting frame 15, the slide fitting 22 is provided with a slide structure by providing a long hole. Affixed to and fixed with a double-sided tape 23. Then, the fixing bracket 21 fixed to the mounting frame 15 in advance and the outside of the long hole of the slide fitting 22 are fastened with screws 24 and a collar 25.

  As a structure for preventing the lenticular lens 11 from dropping due to expansion and contraction due to environmental changes, the fixed position of the slide fitting 22 is held outside the long hole so as not to move. For the shrinkage of the screen, the fixed portion of the lenticular lens 11 and the sheet material 13 of material A is protected by using a double-sided tape 23 having the property of following the stress.

  Further, as a structure for preventing the screen 1 from expanding and the screen from expanding to the viewing side, the fixing bracket 21 and the slide fitting 22 having a long hole are fixed with screws 24 with a collar 25 interposed therebetween. As a result, the slide fitting 22 is not completely fixed, and the expansion of the screen is absorbed by the sliding structure.

  In the multi-screen display device according to the present invention, a plurality of screens are arranged adjacent to each other, so that the gap between the screens can be made narrower than before. In addition, as a fixing means between the screen and the mounting frame, by using an adhesive fixing with double-sided tape that has the property of following the stress and a metal fitting with a slide structure, the screen expands due to environmental changes such as high temperature and humidity. The shrinkage can be absorbed, and as a result, the screen size can be doubled as compared with the conventional one, thereby reducing the cost.

  Accordingly, it is possible to improve the image quality and appearance quality of the projected video from the projector. Further, the light source from the adjacent projector can be blocked by the sheet material of material A and the sheet material of material B, and it is also possible to prevent interference due to adjacent images.

  The present invention relates to a multi-screen display device that can display one large screen by a multi-screen in which a plurality of screens on which images from a projector are projected from the back are arranged adjacent to each other, and narrows the gap (joint) between the screens. The structure to realize is useful.

1 is an external view of a screen of a multi-screen display device according to Embodiment 1 of the present invention. The perspective view which shows the structure of the screen of the multi-screen display apparatus in Embodiment 1 of this invention. The figure which shows the structure of the fixing means in Embodiment 2 of this invention. External view of screen of conventional multi-screen display device Internal structure diagram of screen of conventional multi-screen display device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Screen 11 Lenticular lens 12 Fresnel lens 13 Material A sheet material 14 Material B sheet material 15 Mounting frame 21 Fixing bracket 22 Slide bracket 23 Double-sided tape 24 Screw 25 Color 31 Left side screen holding part 32 Bottom side screen holding part 33 Right side screen holding Part 34 Upper side screen holding part 35 Mounting frame 41 Double-sided tape 42 Joint

Claims (5)

In a multi-screen display device that displays one large screen by a multi-screen in which a plurality of screens on which images from a projector are projected from the back are arranged adjacent to each other, the end face of the screen has a thin and high elastic property. A multi-screen display device in which a sheet material is bonded and fixed. The multi-screen display device according to claim 1, wherein the sheet material is provided with a protruding shape for each portion where a possibility of generating stress is high. 3. The multi-screen display device according to claim 2, wherein a mounting frame for holding the screen and a protruding portion of the sheet material are connected and fixed via a metal fitting. 4. The multi-screen display device according to claim 3, wherein the sheet material and the metal fitting are fixed by an adhesive member having a property of following stress. 5. The multi-screen display device according to claim 3, wherein the connecting and fixing portion of the metal fitting has a slide structure, and stress generated by an environmental change is absorbed by the connecting and fixing portion of the slide structure.