JPH01134491A - Large screen display device - Google Patents

Abstract

PURPOSE: To provide a display device which does not lose the continuity of a screen and has excellent visibility by mounting a light transparent holding plate having the same coefft. of expansion as the coefft. of expansion of plural screen members at the front surface side of a casing and holding the plural screen members by this light transparent holding plate from its rear surface side. CONSTITUTION: The light rays from projectors 22, 23 arrive at the rear surface of the light transparent holding plate 28 via mirrors 26, 27, further, pass the inside of the light transparent holding plate 28 and are projected on the screens 10, 12. At this time, silicone rubber 32 is packed and, therefore, the leakage of the light from gaps does not arise. When the temp. in the casing 9 rises, the thermal stresses tend to be generated by the tightening of screw members 31 but the generation such thermal stresses does not arise as the coeffts. of thermal expansion of the screens 10, 12 and the light transparent holding plates 28, 30 are the same. The expansion in a vertical direction can be dealt with that the through-holes for the mounting screws 29 which are disposed on the front surface side of the frame 1 are formed sufficiently large.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a large screen display device that projects and displays the status of power system plant equipment, etc. on a large screen using a projector.

[Conventional technology]

FIG. 4 is a perspective view showing the appearance of a conventional large screen display device. In the figure, 1 and 2 are frame bodies having a substantially U-shaped cross section, 3 is a decorative side panel, 4 and 5 are frame bodies 1, 2 an upper decorative board attached to the upper part of the front; 6 and 7 a lower decorative board attached to the lower part of the front of the frames 1 and 2; 8 a connecting plate connecting the frames 1 and 2;
Reference numeral 9 denotes a housing made up of the above members.

10, 11, 12, and 13 are screens made of square acrylic, the inner surface of which has been Fresnel-processed into concentric circles, and the outer surface of which has been processed with wrench killer processing in the vertical direction; 14.15° 16 .17.18 Tighten these screens 10, 11゜12.13 with screws 19.
This is a holding metal fitting for holding the device. FIG. 5 is a cross-sectional view showing the installed state of the screen 10° 11, for example, and FIG. 6 is a partially enlarged view of FIG. 5. In FIG. 6, 10a and ila are holes for inserting the tightening screw 19,
The diameter of the hole is also large enough to accommodate the expansion and contraction of the screen 10.11, as well as the diameter of the tightening screw 19. Note that screens 10, 1 are provided inside the housing 9.
1. A plurality of projectors are arranged to project images onto the windows 12 and 13.

Next, the operation will be explained. Screens 10, 11 . When images start to be displayed on screens 12 and 13, the temperature inside the housing 9 rises, so the screen 10
, 11, 12.13 expands. In this case, the acrylic that is the material of the screen is approximately 7x1 in size.
Screen 10 will cause a dimensional change of about 0'01.
, 11, 12, and 13 are each about 1 m square, the gap between the screens will be about 2 to 3 kats. In order to prevent the light from the projector from leaking through such gaps, it was necessary to make the widths of the holding fittings 14, 15, 16, 17, and 18 sufficiently large, as shown in FIG. Specifically, for the holding fitting 15, there are 15 to 20 dragons left and right from the center, and holding fitting 14.
For 16, 15-2011+, holding metal fittings 17.18
For this purpose, a width dimension of 30 to 40,131 mm was required.

[Problem that the invention seeks to solve]

Since the conventional large screen display device is configured as described above, it has the following problems.

In other words, in order to realize a large screen due to limitations in processing the screen members, it is necessary to assemble a plurality of screens 10, 11, 12, 13 as shown in FIG. In order to cope with expansion and contraction, it is necessary to make the gaps between these screens 10, 11, 12, and 13 large to some extent. Therefore, the holding fittings 14,
Since the width dimensions of 15.16° and 17.18° also have to be increased as described above, there is a problem in that the continuity of the screen is lost and the appearance and visual effect are significantly impaired.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a large screen display device that does not lose continuity of the screen and has excellent visibility.

[Means for solving problems]

In the large screen display device according to the present invention, a light-transmissive holding plate having the same expansion coefficient as a plurality of screen members is attached to the front side of the casing, and the plurality of screen members are supported from the back side by the light-transmissive holding plate. It was designed to be retained.

[For production]

The light-transmissive holding plate of the present invention holds a plurality of screen members, but since the dimensions change in the same manner as these screen members, there is no need to provide a gap between the adjacent screen members. . and,
Since this light-transmissive holding plate allows light from the projector to pass therethrough, there is no particular problem in projection onto the screen member. □ [Example] An example of the present invention will be described below with reference to the drawings. 1st
In the figure, reference numerals 20 and 21 are support stands installed in the housing 9, 22.23 are projectors attached to the support stand 20.21 via height adjustment fittings 24.25, and 26.27
are mirrors attached to support stands 20 and 21. A light-transmitting holding plate 28 holds the screen 10.12 from the back side, and is made of acrylic, which is the same material as the screen 10.20, in order to have the same coefficient of expansion. The upper and lower ends of the light-transmissive holding plate 28 are attached to the front side of the housing 9, that is, to the back side of the front side of the frame 1 having a substantially U-shaped cross section, by means of mounting screws 29. Although detailed illustrations are omitted, the through hole provided in the front part of the frame 1 for inserting the mounting screw 29 has a diameter sufficiently large to cope with the expansion and contraction of the light-transmitting retaining plate 28. It is. The mounting screws 29 are covered by the upper decorative board 4 and the lower decorative board 6 so that the appearance is not impaired.

2 is a perspective view showing the appearance of the large screen display device shown in FIG. 1, and FIG. 3 is a perspective view showing the screen 10 in FIG.
11 is a transverse cross-sectional view showing the attached state of No. 11. FIG.

In these figures, 30 is a light-transmissive holding plate that holds the screens 11 and 13 similarly to the light-transmissive holding plate 28, and 31 is the screens io and 1i.

Screw members for attaching 12.13 to the light-transmitting holding plate 28.30, 32 is the light-transmitting holding plate 28 holding the screen 10.12, and the light-transmitting holding plate 28 holding the screen 11.13. 30 is filled with silicone rubber as an elastic member.

This silicone rubber 32 may be the same as that used to close the gap in a pipe hole drilled in a wall when installing a general household air conditioner, for example. , 12° 13 are assembled and then filled. Further, the color of the silicone rubber 32 is not particularly limited, but black is used in this embodiment.

Next, the operation will be explained. The light from the glow detectors 22 and 23 passes through the mirrors 26 and 27 to the light transmitting holding plate 28.
The light reaches the rear surface of the screen, passes through the light-transmissive holding plate 28, and is projected onto the screen 10.12. At this time,
Light-transmissive holding plate 28 holding screen 10.12
Since the silicone rubber 32 is filled between the spacer and the light-transmissive holding plate 30 holding the screen 11.13, no light leaks from the gap.

When the temperature inside the housing 9 rises, the screen 10
, 11.12.13 and the light transmitting retaining plate 28,30 expand, thermal stress due to tightening of the screw member 31 is about to occur, but the screen 10, 11, 12, 13 and the light transmitting retaining plate 28,30 expand. Since the expansion coefficients of the plates 28 and 30 are the same, such thermal stress will not occur. Regarding the vertical expansion of the light-transmitting retaining plates 28 and 30, as described above, the mounting screws 29 and 29 provided on the front surface of the frame 1
This can be achieved by forming a sufficiently large through hole for the purpose. The lateral expansion of the screens 10, 11° 12.13 and the light-transmissive holding plates 28, 30 can be absorbed by the elastic properties of the silicone rubber 32.

In addition, in the above embodiment, two sets of light-transmissive holding plates 28 holding the screen 10.12 and the screen 11.13 are used.
．． Although the case where there are 30 sets has been described, it is of course possible to have three or more sets, or only one set.

Furthermore, in the above embodiment, the light-transmitting retaining plate 28.30 is attached to the front surface of the frame 1 using the mounting screws 29, but the upper end of the light-transmitting retaining plate 28.30 is The same effect as in the above embodiment can be obtained even if the structure is suspended from the upper part and the lower ends are pressed and fixed by elastic suppressing means such as a rubber rod.

Furthermore, in the above embodiment, the gap between the light-transmissive holding plate 28 holding the screen 10.12 and the light-transmitting holding plate 30 holding the screen 11.13 was filled with silicone rubber 32. Although the case is shown above, it is also possible to use a member made of other materials such as sponge, as long as it is expandable and removable.

〔Effect of the invention〕

As described above, according to the present invention, a light-transmissive holding plate having the same expansion coefficient as a plurality of screen members is attached to the front side of the housing, and a plurality of screen members are held by this light-transmissive holding plate. Since it is configured to be held from the back side, the structure is inexpensive and easy to assemble, and it has the effect of significantly improving visibility without losing the continuity of the screen.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a large screen display device according to an embodiment of the present invention, FIG. 2 is a perspective view showing the appearance of the large screen display device in FIG. 1, and FIG. 3 is a part of FIG. 2. 4 is a perspective view showing the external appearance of a conventional large screen display device; FIG. 5 is a cross sectional view showing the mounting state of some members in FIG. 4; FIG. 6 is a partially enlarged view showing a part of FIG. 5 on an enlarged scale. 9 is a housing, 10, 11, 12, 13 are screen members (
screen), 22.23 is a projector, 28.30
32 is an elastic member (silicon rubber). In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Patent Applicant: Mitsubishi Electric Corporation Figure 1 9 2 casing cores ≦ 22.23: Arozuf 910, +2 varnish 7J-JP on 2
8:ff1aia4tW,! (Screen) 11.13: Mata 7 Rinchi D Yusai (Mata Kutsu) Figure 3

Claims (3)

[Claims] (1) In a large screen display device including a projector disposed inside a housing, and a plurality of screen members attached to the front side of the housing for displaying images from the projector, the plurality of screen members and What is claimed is: 1. A large screen display device comprising a light-transmissive holding plate having the same coefficient of expansion, holding the plurality of screen members from the back side thereof, and being attached to the front side of the housing. (2) The large screen display device according to claim 1, further comprising a plurality of light-transmitting holding plates on which the plurality of screen members are held. (3) A gap portion adjacent to the plurality of light-transmissive holding plates and the plurality of screen members absorbs the expansion length of the plurality of light-transmissive holding plates and the plurality of screen members, and allows the space to be removed from the projector. 3. The large screen display device according to claim 2, further comprising an elastic member that blocks light.