WO2017110601A1

WO2017110601A1 - Display apparatus

Info

Publication number: WO2017110601A1
Application number: PCT/JP2016/087141
Authority: WO
Inventors: 武巳松本; 将人寺西
Original assignee: 三菱電機株式会社
Priority date: 2015-12-22
Filing date: 2016-12-14
Publication date: 2017-06-29
Also published as: JPWO2017110601A1; JP2019215553A; JP6563521B2

Abstract

A display apparatus in which a plurality of display units (3) arranged in matrix form are secured to a housing, each of the display units being provided with a substrate (8) on which light-emitting elements (11) are arranged in matrix form, and a power supply (9) for supplying electric power to the light-emitting elements, each of the display units that include the substrate and the power supply being of waterproof construction independently from each other.

Description

Display device

The present invention relates to a large-sized image display device configured by connecting a plurality of display units, such as LEDs (light emitting diodes), arranged in the front side in the left-right (horizontal) and vertical (vertical) directions. is there.

As the brightness of LEDs (light emitting diodes) increases, display devices using display units arranged in a matrix using LEDs as light sources will be installed along roads, in front of stations, in baseball stadiums and racetracks. It has become. Such a display device employs a fixed configuration according to the purpose and purpose, such as fixed installation on a building such as a building, or a portable type that is mounted on a loading platform of a large vehicle and moved. By using a display device having a plurality of display units as a basic structural unit and appropriately selecting the number of display devices, the size of the display screen can be set relatively freely.

As a structure of a basic structural unit of a display device, for example, there is a structure as described in Patent Document 1. In this structure, a plurality of waterproof display units are mounted on a housing having an opening on the front surface.

Also, when a large display screen is configured by combining a plurality of display devices, it is necessary to arrange the display devices with high accuracy. As a structure for accurately determining the positional relationship between display devices at this time, for example, there is a structure as described in Patent Document 2 or Patent Document 3.

JP 2009-198631 A (page 8, FIG. 2) JP-A-6-337644 (page 6, FIG. 1) JP 2001-350434 A (page 9, FIG. 7)

In the technology such as the above-mentioned Patent Document 1, the use of a waterproofed display unit eliminates the need for waterproofness of a housing in which a plurality of the display units are mounted, and the manufacturability is good. However, in addition to the display unit, a power supply device with a separate waterproof measure is required. Further, since it is necessary to provide a large number of openings on the front surface of the housing, there is a problem that the yield of the material is poor and it is not economical.

Further, in the technique such as the above-mentioned Patent Document 2, it is possible to ensure the dimensional accuracy of the display surfaces of the display devices with high accuracy, but a connection fitting for connecting the display devices to each other is necessary. It is a complicated shape in which a plurality of plate materials are joined, and the cost is high.

In addition, in the technique such as Patent Document 3, the dimensional accuracy of the display surfaces of the display devices can be ensured as in Patent Document 2, but a connecting tool for connecting the display devices or a rod for positioning. Special parts are required and the cost is high.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a display device that has a high degree of freedom in designing a housing and is easy to assemble.

The present invention is a display device in which a plurality of display units arranged in a matrix are fixed to a housing, and each display unit supplies power to a substrate and the light emitting elements in which the light emitting elements are arranged in a matrix. Each display unit including a substrate and a power source has a waterproof structure independently.

According to the present invention, it is not necessary to prepare a power supply device that is waterproofed separately from the display unit, and it is not necessary to apply waterproofing measures to the housing of the display device. However, a simple display device can be provided.

1 is an external perspective view showing a schematic configuration of a display device according to Embodiment 1 of the present invention. 1 is an exploded perspective view of an external appearance showing a schematic configuration of a display device according to Embodiment 1 of the present invention. It is side surface sectional drawing which shows schematic structure of the display unit of the display apparatus by Embodiment 1 of this invention. It is a disassembled perspective view of the external appearance which shows schematic structure of the display apparatus by Embodiment 2 of this invention. It is a perspective view which shows schematic structure of the housing | casing of the display apparatus by Embodiment 2 of this invention. It is a perspective view which shows schematic structure of the housing | casing of the display apparatus by Embodiment 3 of this invention. It is a perspective view which partially decomposes | disassembles and shows schematic structure of the housing | casing of the display apparatus by Embodiment 3 of this invention. It is a perspective view which decomposes | disassembles and shows schematic structure of the housing | casing of the display apparatus by Embodiment 4 of this invention. It is an expansion perspective view which decomposes | disassembles and shows the structure of the principal part of the housing | casing of the display apparatus by Embodiment 4 of this invention. It is an expansion perspective view for demonstrating the structure of the principal part of the housing | casing of the display apparatus by Embodiment 4 of this invention in association with the display apparatus by Embodiment 5. FIG. It is a perspective view which shows schematic structure of the housing | casing of the display apparatus by Embodiment 5 of this invention seeing from diagonally downward. It is a disassembled perspective view for demonstrating the assembly of the principal part of the housing | casing of the display apparatus by Embodiment 5 of this invention. It is a perspective view which partially decomposes | disassembles and shows schematic structure of the housing | casing of the display apparatus by Embodiment 6 of this invention. It is a disassembled perspective view for demonstrating the assembly of the principal part of the housing | casing of the display apparatus by Embodiment 6 of this invention. It is a perspective view for demonstrating the assembly of the principal part of the display apparatus by Embodiment 6 of this invention. It is another perspective view for demonstrating the assembly of the principal part of the display apparatus by Embodiment 6 of this invention.

Embodiment 1 FIG.
A display device according to Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of an external appearance of a display device 1 according to Embodiment 1 of the present invention viewed obliquely from above. The display device 1 is configured by mounting a plurality of display units 3 in a matrix on a box 2 formed in a box shape.

FIG. 2 is a perspective view of the display device 1 according to Embodiment 1 of the present invention, partially disassembled and viewed from obliquely above. The housing 2 is formed in a box shape from a steel plate, and rectangular openings 4 for mounting a plurality of display units 3 on the front surface are provided in a matrix. The display unit 3 is attached to the housing 2 with screws 5. A cover (not shown) is provided on the rear surface of the housing 2 in order to replace the failed display unit 3 and perform other maintenance.

FIG. 3 is a cross-sectional view of the display unit 3 of the display device according to the first embodiment of the present invention as seen from the side. The display unit 3 includes a printed wiring board 7, a control circuit board 8, and a power supply device 9 inside a case 6. A connector 10 for connecting to another display unit 3 or connecting a signal line is mounted on the back surface of the case 6. This connector 10 is a waterproof connection connector, and waterproofness is ensured by connecting wiring.

The display surface 12 is formed on the surface of the printed wiring board 7 by arranging LEDs 11 as light emitting elements emitting red, green, or blue light as a set in a matrix. Further, a light-shielding louver 13 is mounted on the display surface 12 in order to improve the visibility from the surface, and the display unit 3 is composed of the above components.

In addition, as shown in FIG. 3, the display unit 3 is waterproofed 14 by resin sealing or laminating with a film sheet, except for the connection portion of the connector 10 as shown in FIG. Yes. Further, the connector 10 is waterproofed by connecting the wiring as described above. Thereby, in the state where wiring was connected, the display unit 3 including a board | substrate and a power supply becomes a waterproof structure independently.

Conventionally, there has been no idea of providing a power supply for each display unit to supply power to light emitting elements arranged on a substrate as a display panel. For example, one power source is generally provided for the number of display panels shown in FIG. This is thought to be due to the common belief that the common power source is common sense for those skilled in the art because of the cost of the entire power source and the ease of assembly. However, as a result of examining the waterproofing and assembly cost of the entire apparatus, the inventors of the present application have one display unit with one power source as shown in FIG. By making the display unit waterproof structure alone, it is not necessary to make the case waterproof, and the structure with the display unit fixed can be structured so that rainwater or the like can enter from the outside to the inside. Therefore, the present invention has been devised by realizing that it is possible to provide a display device that has a high degree of freedom in designing the housing and can be easily assembled. The form of the housing structure will be described in the second and subsequent embodiments.

As described above, according to the first embodiment, by preparing each display unit 3 including the substrate and the power supply independently with a waterproof structure, a power supply device with a waterproof measure is prepared separately from the display unit. The display device 1 is waterproof even if the housing in which the display unit is fixed has a structure in which water such as rainwater can enter from the outside without taking measures against waterproofing. Sex can be secured. Therefore, the design freedom of the housing | casing 2 is high, a structure can be simplified, and the display apparatus which suppressed the cost can be provided.

Embodiment 2. FIG.
A display apparatus according to Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 4 is a perspective view of the disassembled display device 1 according to the second embodiment of the present invention as viewed obliquely from above. This embodiment is different from the first embodiment in that the housing 2 is not formed of a steel plate in a box shape, but a frame manufactured by bending a steel plate extending in the longitudinal direction along the longitudinal direction. It is the point comprised by combining. Conventionally, since a waterproof measure has been required for the housing, the housing has to be made into a complicated waterproof structure. However, the display unit including the substrate and the power source described in Embodiment 1 has a waterproof structure alone. Use of the display unit eliminates the need for waterproofing measures for the housing itself. For this reason, the housing with the display unit fixed may have a structure in which rain water or the like can enter from the outside to the inside, so that the housing can be configured only by a combination of frames. It is.

FIG. 5 is a perspective view of the housing 2 of the display device 1 according to the second embodiment of the present invention as viewed obliquely from above. A horizontal frame 16 is attached and fixed in a rectangular frame-shaped peripheral frame 15. For fixing the horizontal frame 16, welding or the like may be used. Since waterproofing measures for the fastening part between the frames are not required and the housing with the display unit fixed may have a structure that allows water such as rainwater to enter from the outside to the inside, it can be joined and fixed by welding. In this case, the fastening may be performed by fastening means for fastening discretely, such as spot welding. The size of the housing 2 may be determined as appropriate according to the specifications of the display device 1, and accordingly, the size of the surrounding frame 15 and the number of the horizontal frames 16 may be determined as appropriate. The peripheral frame 15 is formed by bending a steel plate extending in the longitudinal direction along the longitudinal direction with a press brake. Similarly, the lateral frame 16 is also bending a steel plate extending in the longitudinal direction along the longitudinal direction with a press brake. Are molded. The cross-sectional shape perpendicular to the longitudinal direction of the horizontal frame 16 is formed in an L shape or a U shape, that is, a shape bent at a right angle, and may be determined by selecting an appropriate cross section according to the required strength. Similarly, the cross-sectional dimension may be determined according to the required strength.

As described above, according to the second embodiment, the casing 2 is configured only by a combination of frames manufactured by bending a flat steel plate extending in the longitudinal direction along the longitudinal direction by a press brake. There is no need to make a hole in the steel plate to provide the opening 4 as in the case of the box shape, so that the housing 2 can be manufactured without deteriorating the material yield. In addition, since it is not necessary to take a waterproof measure at the fastening portion between the frames, a display device can be obtained with a small number of parts and a simple housing assembly and display unit mounting.

Embodiment 3 FIG.
Embodiment 3 of the present invention will be described with reference to the drawings. FIG. 6 is a perspective view of the housing 2 of the display device according to the third embodiment of the present invention as viewed obliquely from above. The present embodiment is different from the second embodiment in that a vertical frame 17 is added. When the display device 1 is installed in a place that is often exposed to strong outdoor wind, it may happen that only the surrounding frame 15 and the lateral frame 16 cannot secure sufficient rigidity against the load due to wind. In such a case, adding the vertical frame 17 is effective in improving the rigidity of the housing 2.

FIG. 7 is a perspective view of the structure of the housing 2 of the display device 1 according to the third embodiment of the present invention, as seen from an obliquely upper side, with a part of the vertical frame 17 disassembled. A steel plate is bent by a press brake and formed into a frame, and a horizontal frame 16 which is similarly bent into a frame by pressing the steel plate into a frame is formed in a peripheral frame 15 formed into a square frame shape. The attachment by welding or the like is the same as in the second embodiment. Similarly to the other frames, the vertical frame 17 is formed by bending a steel plate with a press brake, and the length dimension may be determined in accordance with the interval between the horizontal frames 16. The vertical frame 17 only needs to be fixed to the horizontal frame 16 by welding at the upper and lower ends, and the number of the vertical frames 17 may be appropriately determined according to the number of display units 3 attached to the display device 1. . Thereby, the opening part 4 for attaching the display unit 3 can be formed, without making a hole in a steel plate.

Also in the display device according to the third embodiment, the display unit described in the first embodiment, which includes a substrate and a power source, is provided with a waterproof structure alone. For this reason, the housing with the display unit fixed may have a structure in which rain water or the like can enter from the outside to the inside, and waterproof measures for the fastening portion between the frames are unnecessary, and the housing is joined by welding. In the case of fastening, the fastening may be performed by a fastening means for discrete fastening such as spot welding.

As described above, according to the third embodiment, the housing 2 can be manufactured without increasing the yield of the material while improving the rigidity of the housing 2. In addition, since it is not necessary to take a waterproof measure at the fastening portion between the frames, a display device can be obtained with a small number of parts and a simple housing assembly and display unit mounting.

Embodiment 4 FIG.
Embodiment 4 of the present invention will be described with reference to the drawings. FIG. 8 is an exploded perspective view showing the structure of the housing 2 of the display device according to the fourth embodiment of the present invention as seen from obliquely above. The present embodiment differs from the third embodiment in the dimensions of the vertical frame 17 and the method of assembling the horizontal frame 16 and the vertical frame 17. A horizontal frame 16 is attached over the entire length in the width direction in a peripheral frame 15 processed into a rectangular frame shape. A vertical frame 17 is attached over the entire length in the vertical direction perpendicular to the horizontal frame 16. The horizontal frame 16 and the vertical frame 17 are each attached to the peripheral frame 15 with rivets 18. Also in the display device according to the fourth embodiment, the display unit described in the first embodiment, in which the display unit including the substrate and the power source has a waterproof structure alone, is disposed, and thus the housing in which the display unit is fixed However, it may have a structure in which rainwater or the like can enter from the outside to the inside, and there is no need for a waterproof measure for the fastening portion between the frames, and a fastening means for discrete fastening such as fastening with rivets is possible. It became.

FIG. 9 is an enlarged perspective view from obliquely above showing a method of assembling the horizontal frame 16 and the vertical frame 17 of the housing 2 according to the fourth embodiment of the present invention. The horizontal frame 16 and the vertical frame 17 are formed by bending a steel plate with a press brake so that the cross-sectional shape is U-shaped (a square shape without one side), and the horizontal frame 16 has a slit a19. The frame 17 has a slit b20. At the time of assembly, the U-shaped inner part of the horizontal frame 16 is fitted so that the U-shaped outer part of the vertical frame 17 is in contact therewith. At this time, the slit a19 and the slit b20 are fitted to each other so that the horizontal frame 16 and the vertical frame 17 are fitted. However, when the horizontal frame 16 is formed in a U-shape, a bend R exists inside the bent portion. To do. Therefore, the vertical frame 17 interferes with the inner bending R of the horizontal frame 16 and cannot be completely in contact. Therefore, a slit c21 is provided inside the two slits b20 of the vertical frame 17. By doing so, interference with the inner bending R of the horizontal frame 16 can be avoided, and the U-shaped outer side portion of the vertical frame 17 can be in contact with the U-shaped inner side portion of the horizontal frame 16. Further, at this time, the slits a19 and b20 are formed so that the frames can be smoothly fitted to each other, the assembly backlash at the time of fitting can be minimized, and processing can be performed by a general-purpose machine such as a turret punch press. The width dimension may be set to a dimension about 0.1 to 0.2 mm larger than the plate thickness dimension of the steel plate used for the mating frame. In this state, the horizontal frame 16 and the vertical frame 17 are fastened by the rivets 18 to complete the assembly. At this time, the number of the horizontal frames 16 and the vertical frames 17 may be appropriately determined according to the number of display units 3 attached to the display device 1. Note that the number of rivets 18 used for fastening may be appropriately determined as necessary. Further, the fastening may be performed by screw fastening or spot welding instead of the rivet 18. Since the waterproof part of the fastening part between the frames is not necessary, the housing with the display unit fixed may have a structure in which water such as rainwater can enter from the outside to the inside. Thus, a fastening means for discrete fastening such as rivet, screw fastening or spot welding has become possible.

As described above, according to the fourth embodiment, the vertical frames 17 are not subdivided, continuous welding without gaps is not performed during assembly, and the material yield is not deteriorated. No waterproofing measures are required at the fastening portion, and anyone can easily assemble the housing 2.

Embodiment 5 FIG.
Embodiment 5 of the present invention will be described with reference to the drawings. FIG. 10 is an enlarged perspective view of the fitting state of the fitting portion between the horizontal frame 16 and the vertical frame 17 in the housing 2 of the display device according to the fourth embodiment shown in FIG. is there. When the display device 1 is installed in a place that is often exposed to strong outdoor wind, the wind pressure 22 repeatedly acts on the surface of the housing 2. In such a case, a repeated force 23 for opening and closing the slit a19 acts on the slit a19 of the horizontal frame 16. When a force for opening or closing the slit a <b> 19 is generated, stress concentration occurs in the slit end 24. For this reason, when the repeated force 23 is applied, the slit end 24 naturally undergoes repeated stress. If stress concentrates on the slit end 24 and is repeatedly generated, the lateral frame 16 may cause fatigue failure starting from the slit end 24 of the slit a19. In order to prevent this, it is necessary to devise the structure of the horizontal frame 16 so that stress concentration does not occur at the slit end 24 of the slit a19. Needless to say, the same concern applies to the slit b20 of the vertical frame 17.

FIG. 11 is a perspective view of the housing 2 of the display device according to the fifth embodiment when viewed obliquely from below. The present embodiment is different from the fourth embodiment in that a reinforcing horizontal frame 25 is added to the back surface of the housing 2. After the horizontal frame 16 and the vertical frame 17 are fitted, the horizontal frame 16 is joined to the reinforcing horizontal frame 25. A fitting and joining part is demonstrated in detail using another figure.

FIG. 12 is a perspective view of the fitting portion of the horizontal frame 16, the reinforcing horizontal frame 25, and the vertical frame 17 of the housing 2 of the display device according to the fifth embodiment of the present invention as seen obliquely from below. The horizontal frame 16 is formed by bending a steel plate with a press brake. The cross section is basically a U-shape, and only the upper one side surface is extended rearward, and is further bent at one end at its tip. A slit a <b> 19 for fitting with the vertical frame 17 is provided on the upper and lower side surfaces and the end surface 26 bent at one corner. The vertical frame 17 is formed by bending a steel plate with a press brake in the same manner as the horizontal frame 16 and has a U-shaped cross section. The vertical frame 17 has a square hole 27 in the fitting surface with the horizontal frame 16 for penetrating the front end surface 26 of the horizontal frame 16 when fitted, and the horizontal frame 16 is fitted on both side surfaces. A slit b20 is provided for this purpose. The slit c21 for avoiding interference with the horizontal frame 16 is provided inside the slit b20, as in the fourth embodiment. At the time of fitting, the slits are fitted to each other through the square hole 27 of the vertical frame 17 on the front end surface 26 of the horizontal frame 16, and the rivets 18 are fastened together. Thereafter, the front end face 26 of the horizontal frame 16 and the reinforcing horizontal frame 25 are brought into close contact with each other, and the three locations are fastened with rivets 18. The reinforcing horizontal frame 25 is also formed by bending a steel plate with a press brake, and its cross-sectional shape is a U-shape. By fastening the three rivets 18 between the two slits a19 on the front end face 26 of the horizontal frame 16 and in the vicinity of the outside, the movement of opening and closing the slits a19 by wind pressure can be restricted. By constraining the movement of the slit a19, it is possible to suppress the generation of stress on the slit end 24, so that stress concentration does not occur, and as a result, the horizontal frame 16 starting from the slit end 24 of the slit a19. Fatigue failure can be prevented. It goes without saying that the same countermeasure is effective for the vertical frame 17. Further, the number of the horizontal frame 16, the reinforcing horizontal frame 25, and the vertical frame 17 may be appropriately determined according to the number of display units 3 attached to the display device 1. Needless to say, the frames may be fastened together with screws or spot welding as in the fourth embodiment.

As described above, according to the fifth embodiment, the casing in which the display unit is fixed may have a structure in which water such as rainwater can enter from the outside to the inside. The case can be designed without considering waterproofing measures, and wind pressure that repeatedly acts only with fastening means that are discretely fastened, such as fastening with rivets, rather than fastening with continuous welding without gaps It is possible to prevent fatigue destruction of the housing 2 due to the above.

Embodiment 6 FIG.
Embodiment 6 of the present invention will be described with reference to the drawings. FIG. 13 is an exploded perspective view showing the schematic configuration of the housing 2 of the display device according to the sixth embodiment of the present invention in an exploded view from obliquely above. The sixth embodiment is different from the other embodiments in that the peripheral frame 15 is composed of a total of four parts, with each side of the two horizontal peripheral frames 28 and the two vertical peripheral frames 29 being independent. Is a point. Each of the horizontal peripheral frame 28 and the vertical peripheral frame 29 is formed by cutting a steel plate to a required development size with a shear cutter or a laser cutter, and bending it with a press brake along two long sides. . For this reason, the dimension on the long side is not subjected to processing such as bending and is still cut by a cutting machine, so that the length dimension accuracy is ensured.

FIG. 14 is a perspective view from obliquely above showing a state of assembling the horizontal peripheral frame 28 and the vertical peripheral frame 29 at the corners of the peripheral frame 15 according to the sixth embodiment of the present invention. The lateral peripheral frame 28 and the vertical peripheral frame 29 are provided with rivet pilot holes 30 that are accurately positioned from the end portions in the bent surface portion and the flat surface portion of both long sides. The rivet pilot holes 30 of the horizontal peripheral frame 28 and the vertical peripheral frame 29 are fastened with the rivets 18. Further, a corner fitting 31 bent at a right angle is fastened with a rivet at a corner where the horizontal peripheral frame 28 and the vertical peripheral frame 29 are fastened. The corner metal 31 is secured with high accuracy in the position of the rivet pilot hole 30 and the right-angled bending accuracy. By assembling these, it is possible to manufacture the peripheral frame 15 with high accuracy in height dimension accuracy, width dimension accuracy, and squareness squareness accuracy. As described above, also in the display device according to the sixth embodiment, since the display unit including the substrate and the power source described in the first embodiment is provided with a waterproof structure alone in the housing 2, the display unit is displayed. Since the housing with the unit fixed may have a structure in which rainwater or the like can enter from the outside to the inside, there is no need for waterproof measures between the fastening parts of the frames, such as fastening with rivets, The fastening means for discrete fastening is now possible. According to the sixth embodiment, in particular, in the surrounding frame, by simply fastening a linear frame that is not subjected to processing such as bending in the longitudinal direction with a rivet using a corner metal fitting bent at a right angle, A simple structure without waterproofing can be achieved.

Embodiment 7 FIG.
FIG. 15 is an enlarged perspective view of a main part for explaining the display device according to the seventh embodiment of the present invention. By arranging a plurality of the display devices described in Embodiments 1 to 6, a larger display device can be obtained. In other words, a plurality of display devices described in the first to sixth embodiments can be configured to be fixed and arranged in a state where the outer peripheral surfaces of the housings of adjacent display devices are in contact with each other. As an example, FIG. 15 is a perspective view from obliquely above for explaining the state of the corners of the surrounding frame 15 when the display devices according to the sixth embodiment are provided side by side. In the vertical peripheral frame 29, an escape hole 33 for escaping the head of the rivet 32 of the adjacent display device is formed alternately with a pilot hole for passing the rivet 32. Thereby, since the heads of the rivets 32 that have jumped out to the side surfaces of the adjacent display devices 1 are hidden in the escape holes on the other side, the surrounding frames 15 can be closely attached to each other. At this time, since the accuracy of the vertical and horizontal dimensions of the surrounding frames is ensured as described above, the positions of the display devices 1 are determined by bringing the display devices 1 into close contact with each other, and the positions are determined using special parts. There is no need to make fine adjustments. Needless to say, the same structure may be adopted in the case of stacking vertically.

FIG. 16 is another enlarged perspective view of the main part for explaining the display device according to the seventh embodiment of the present invention. That is, it is a perspective view from obliquely above showing the state of the connection portion of the peripheral frame 15 when the display device according to the sixth embodiment of the present invention is provided side by side. A stepped bolt 34 is used to connect the display devices. The diameter of the fastening hole 35 for the stepped bolt 34 may be about 0.1 mm larger than the shaft diameter of the stepped bolt 34. Accordingly, if the display devices are fastened with the stepped bolts 34, the mutual displacement in the front-rear direction can be suppressed to 0.1 mm or less.

As described above, according to the seventh embodiment, it is possible to ensure the dimensional accuracy of the display devices in the front-rear direction, the left-right direction, and the up-down direction without using a special tool such as a connecting bracket or a rod rod.

In the above, the connection part was demonstrated to the example of the display apparatus which fixes and arrange | positions the display apparatus by Embodiment 6 in the state which one surface of each outer peripheral surface contacted. However, even in the case of a display device in which the display devices according to the first to fifth embodiments are fixed and arranged in a state where the outer peripheral surfaces of the housings of a plurality of adjacent display devices are in contact with each other, the connecting bracket Needless to say, it is possible to ensure the dimensional accuracy of the display devices in the front-rear direction, the left-right direction, and the vertical direction without using a special tool such as a rod or a rod.

It should be noted that the present invention can be combined with each other within the scope of the present invention, and each embodiment can be appropriately modified or omitted.

1 display device, 2 housing, 3 display unit, 4 openings, 5 screws, 6 case, 7 printed wiring board, 8 control circuit board, 9 power supply device, 10 connector, 11 LED (light emitting element), 12 display surface, 13 louvers, 14 waterproofing, 15 surrounding frames, 16 horizontal frames, 17 vertical frames, 18 rivets, 19 slits a, 20 slits b, 21 slits c, 22 wind pressure, 23 repeated forces, 24 slit ends, 25 for reinforcement Horizontal frame, 26 tip surface, 27 square holes, 28 horizontal peripheral frame, 29 vertical peripheral frame, 30 rivet pilot holes, 31 corner fittings, 32 rivets, 33 relief holes, 34 stepped bolts, 35 fastening holes

Claims

A display device in which a plurality of display units arranged in a matrix are fixed to a housing, each of the display units supplying power to a substrate in which the light emitting elements are arranged in a matrix and the light emitting elements A display device characterized in that each of the display units including the substrate and the power source has a waterproof structure alone.
The display device according to claim 1, wherein the housing in a state where the display unit is fixed has a structure in which water can enter from the outside to the inside.
3. The display device according to claim 2, wherein the casing is composed of a combination of steel frame frames extending in the longitudinal direction and bent along the longitudinal direction.
Fastening means in which the casing is composed of a rectangular frame-shaped peripheral frame and a plurality of orthogonal frames fixed to the peripheral frame, and the plurality of orthogonal frames are discretely fastened at intersections. The display device according to claim 3, wherein the display device is fastened.
The display device according to claim 4, wherein the fastening means is fastening by rivets.
6. The display device according to claim 4, wherein a slit formed in a frame that intersects the frame is fitted in a slit formed in the frame.
The surrounding frame has a quadrangular frame shape in which four frames extending in the longitudinal direction are fastened via a corner metal fitting bent at a right angle and fixed to the end of each frame. The display device according to any one of claims 4 to 6.
8. A display comprising a plurality of display devices according to claim 1, wherein the display devices are fixed and arranged in a state in which the outer peripheral surfaces of the casings of adjacent display devices are in contact with each other. apparatus. *