JP2018092060A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display device capable of improving the quality of video by easily hiding a joint between a display tile and other adjacent display tile.SOLUTION: An LED display device 200 is composed of a plurality of LED display tiles 1a-1r on which a plurality of LED display elements are arrayed, the LED display tiles being arranged in a vertical direction and a horizontal direction. The LED display device 200 comprises: a back frame unit 2 which holds backs of the plurality of LED display tiles 1a-1r through joints 10 coupled to the backs of the respective LED display tiles 1a-1r; and a joint width adjustment mechanism which is provided to the joint 10 or the back frame unit 2, and adjusts joint widths between the LED display tiles and other adjacent LED display tiles.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a display device configured by arranging a plurality of display tiles in a vertical direction and a horizontal direction, which are tiled display panels in which a plurality of display elements such as LEDs (Light Emitting Diodes) are arranged in a square array. It is.

  Display tiles composed of a plurality of display elements such as LEDs are often used for outdoor and indoor advertising display, etc., thanks to the technological development and cost reduction of display elements. Until now, display devices including display tiles have been mainly used for displaying natural images and animation moving images. However, when used for indoor advertising display, etc., the viewing distance becomes shorter as the pixel pitch becomes narrower. Therefore, display devices equipped with display tiles are used for image display of personal computers such as conference rooms and surveillance applications. Has also been used. Particularly in surveillance applications, personal computer images close to still images are often displayed.

  In addition, as a display device equipped with display tiles, a small LED display module formed by mounting an LED display element inside a cavity molded with ceramic or resin and then hardening it with a sealing resin is mounted on a substrate. SMD (Surface Mount Device) type is the mainstream. The SMD type display device has been used as a large image display device having a pixel pitch of 3 mm or more.

  However, in recent years, against the background of cost reduction and high definition of LED display elements, large-scale images composed of a plurality of tiled LED display devices configured with high-density mounting products with a pixel pitch of 1 to 2 mm, etc. Display devices have been introduced into the market.

  For example, Patent Literature 1 and Patent Literature 2 disclose constituent elements of an LED display device and a holding method thereof.

  In patent document 1, the large-sized video display apparatus is comprised by the multi display system comprised from the some LED display tile. On the small LED display module substrate, R, G, and B LED display elements are mounted up to the vicinity of the peripheral edge of the module substrate. In order to arrange the plurality of LED display module substrates in a square array to form the first LED display tile, the plurality of LED display module substrates are assembled into a support structure. Similar to the first LED display tile, the second LED display tile is also assembled into a support structure. The first LED display tile and the second LED display tile are assembled into a support structure in a state in which the first LED display tile and the second LED display tile are substantially in close contact with each other while maintaining a very small gap. For this very small gap, the same size as the pixel pitch is required.

  Moreover, in patent document 1 and patent document 2, the shape of the side surface of the LED display tile is processed into a planar shape. When a large-screen image display device is configured by combining a plurality of these LED display tiles, the LED display tiles are connected so that the side surfaces of the LED display tiles are in close contact with each other.

  Patent Document 3 discloses a structure for connecting LED display tiles using a hook-type connecting member.

U.S. Pat. No. 8,384,616 Chinese Patent No. 10193630 Chinese Patent No. 203644333 Specification

  The vertical and horizontal gaps between the LED display tile and the adjacent LED display tile, and the step in the front-rear direction of the LED display surface are suppressed to the same dimensions as the pixel pitch so that these gaps and steps are not noticeable. Is required.

  In Patent Document 1, each LED display tile is supported by a mounting structure so that the arrangement thereof is not impaired. The mounting structure is arranged so that the gap between the LED display tile and the LED display tile adjacent in the vertical direction and the horizontal direction has the same size as the pixel pitch. However, since the side surface of the LED display tile is formed in a plane, other LED adjacent to the LED display tile is caused by mechanical accuracy such as dimensional tolerance or flatness of the support structure holding the LED display tile. There was a problem that the gap between the display tiles varied.

  In Patent Document 2, an LED display module substrate is attached to an LED base component, and a housing frame component and a joint component are attached to the back surface of the LED base component. And the LED display tile comprised from these members has a substantially planar side surface. In Patent Document 2, as in Patent Document 1, when a plurality of LED display tiles are arranged in the vertical direction and the horizontal direction, there is a problem that the gap between the LED display tile and another adjacent LED display tile varies. It was.

  Further, in Patent Document 3, since the LED display tiles are connected to each other using a hook-type connecting member, high-precision alignment is necessary when the LED display tiles are connected in the left-right direction. Therefore, there is a problem that it takes a considerable time to align the LED display tiles.

  As described above, in the structures described in Patent Documents 1 to 3, due to variations in the processing dimensions of the structural parts of the metal casing constituting the LED display tile or warpage of the LED display module substrate, other adjacent LED display tiles may be used. There was a problem that a gap with the LED display tile and a step in the front-rear direction of the LED display surface occurred. Such gaps and steps are recognized as joints, that is, joints between LED display tiles and other adjacent LED display tiles due to changes in luminance or directivity, and the quality of the image deteriorates. It was a factor.

  Accordingly, an object of the present invention is to provide a display device capable of improving the quality of an image by simply making the joint between a display tile and another adjacent display tile inconspicuous. .

  A display device according to the present invention is a display device configured by arranging a plurality of display tiles in which a plurality of display elements are arranged in a vertical direction and a horizontal direction, and includes a joint connected to the back surface of each display tile. A frame unit that holds the back surfaces of the plurality of display tiles, and a joint width provided between the display tile and another adjacent display tile that is provided in the joint or the frame unit. And a joint width adjusting mechanism.

  According to the present invention, the display device includes the joint width adjustment mechanism that is provided in the joint or the frame unit and adjusts the joint width between the display tile and another adjacent display tile. By adjusting the joint width by the mechanism, the joint between the display tile and another adjacent display tile can be easily made inconspicuous. Thereby, the quality of the video can be improved.

It is a perspective view of the LED display apparatus which concerns on embodiment. It is a disassembled perspective view of a LED display tile. It is a rear view of the state which removed the back frame in the LED display apparatus. It is a rear perspective view of an LED display tile. It is a perspective view of the connection part of a frame and a joint. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 4 is a sectional view taken along line BB in FIG. 3. It is the C section enlarged view of FIG. It is a front view of the connection part of a LED base and a back frame unit. It is sectional drawing which shows the state before adjustment of the Z direction in an LED display tile. It is sectional drawing which shows the state which rotates the bush using a Z direction adjustment tool, and is adjusting the Z direction in an LED display tile. It is sectional drawing which shows the state which rotates the connection screw and has fixed the joint to the LED base. It is a figure for demonstrating attachment or detachment of the XY position adjustment jig with respect to an LED display tile.

<Embodiment>
Embodiment 1 of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of an LED display device 200 according to the embodiment, and FIG. 2 is an exploded perspective view of an LED display tile 1f. FIG. 3 is a rear view of the LED display device with the rear frame 13 removed.

  As shown in FIG. 1, an LED display device 200 as a display device includes a plurality of display tiles 1 a to 1 r, a joint 10, a back frame unit 2, and a mount 3. The LED display device 200 further includes a joint width adjusting mechanism that adjusts the joint width between the LED display tile and another adjacent LED display tile.

  The LED display device 200 is configured by arranging, for example, 18 display tiles 1a to 1r on the gantry 3 in the vertical direction and the horizontal direction. More specifically, three display tiles 1a to 1r are arranged in the vertical direction and six in the horizontal direction. Since the 18 LED display tiles 1a to 1r have the same configuration, the LED display tile 1f will be described here.

  As shown in FIG. 2, the LED display tile 1 f includes four LED module substrates 5 and an LED base 6. The four LED module substrates 5 are arranged two in the vertical direction and two in the left-right direction. On each of the four LED module substrates 5, a plurality of LEDs as display elements are arranged in a square array. The LED base 6 is fixed to the back surface of the four LED module substrates 5. The four LED module substrates 5 are accurately positioned with respect to the LED base 6 and are arranged and fixed so that the joint between the LED module substrate 5 and the adjacent LED module substrate 5 is not conspicuous.

  The back frame unit 2 is connected to the back surfaces of the LED display tiles 1a to 1r, more specifically, to the back surface of the LED base 6 via a plurality of joints 10, and holds the back surfaces of the LED display tiles 1a to 1r. The back frame unit 2 is configured by assembling two back frames 12 and 13 having a rectangular frame shape in the front-rear direction. The back frame 12 and the back frame 13 are fixed by a plurality of frames 12e extending in the front-rear direction (hereinafter also referred to as “Z direction”). The frame 12e is arranged at positions corresponding to the four corners of the display tiles 1a to 1r.

  Next, the back frame 12 will be described. As shown in FIGS. 1 to 3, the back frame 12 is a front frame, and includes 12 frames 12 a extending in the left-right direction (hereinafter also referred to as “X direction”) and 12 frames 12 d extending in the X direction. , Five frames 12b extending in the vertical direction (hereinafter also referred to as “Y direction”), and two 12c extending in the Y direction. The two frames 12c form the left end and the right end of the back frame 12, respectively. The five frames 12b are respectively disposed between the LED display tile and another LED display tile adjacent in the X direction.

  The twelve frames 12 a form the upper end portion and the lower end portion of the back frame 12. More specifically, the twelve frames 12a correspond to the upper ends of the LED display tiles 1a to 1f and the lower ends of the LED display tiles 1m to 1r in the two frames 12c and the five frames 12b. Each is linked to a position. The twelve frames 12d are respectively disposed between the LED display tile and another LED display tile adjacent in the Y direction.

  Next, the back frame 13 will be described. The back frame 13 is a rear frame, 12 frames 13a extending in the X direction, 12 frames 13d extending in the X direction, five frames 13b extending in the Y direction, and two frames extending in the Y direction. 13c. The two frames 13c form the left end and the right end of the back frame 13, respectively. The five frames 13b are respectively arranged between the LED display tile and another LED display tile adjacent in the X direction.

  The twelve frames 13 a form the upper end portion and the lower end portion of the back frame 13. More specifically, the twelve frames 13a correspond to the upper ends of the LED display tiles 1a to 1f and the lower ends of the LED display tiles 1m to 1r in the two frames 13c and the five frames 13b. Each is linked to a position. The twelve frames 13d are respectively disposed between the LED display tile and another LED display tile adjacent in the Y direction.

  The LED base 6 contains an LED display driving circuit, a power source, and the like, but since it is the same as the conventional configuration, the description thereof is omitted.

  By adopting a configuration in which the LED module substrate 5 is self-supported by the LED base 6 and the back frame unit 2, the depth of the LED base 6 is increased without providing the back frame unit 2, so that only the external dimension accuracy of the LED base 6 is achieved. Compared to the conventional configuration in which the LED module substrate 5 is relied upon, the LED base 6 can be made smaller. Thereby, it becomes possible to improve the external dimension accuracy of the LED base 6 and to reduce the weight.

  Further, since the rear frame unit 2 is an assembly type, it is possible to correct individual frame distortions and assembly errors when the rear frame unit 2 is assembled. Thereby, the processing cost of the LED base 6 can be suppressed.

  As shown in FIG. 3, the back frame 12 of the back frame unit 2 is connected by a plurality of joints 10. More specifically, the plurality of joints 10 are respectively arranged at positions corresponding to the four corners of the LED display tiles 1a to 1f, and the frame 12c and the frame 12a, the frame 12c and the frame 12d, and the frame 12b and the frame 12a. , And the frame 12b and the frame 12d are connected using screws 110, respectively.

  The back frame 12 of the back frame unit 2 is connected to the back surfaces of the LED display tiles 1a to 1r using a plurality of connecting screws 100. This connection method will be described later. An XY position adjusting jig 50 is attached to the back frame 12 on the back surface of the LED display tile 1e. The back frame unit 2 can be constructed at low cost by using a plurality of frames having different lengths such as extruded frames having the same cross section.

  FIG. 4 is a rear perspective view of the LED display tile 1f. FIG. 5 is a perspective view of a connecting portion of the frame 12d, the frame 12b, and the joint 10. As shown in FIG. 6 is a cross-sectional view taken along the line AA in FIG. 3, and FIG. 7 is a cross-sectional view taken along the line BB in FIG. Here, since the 18 LED display tiles 1a to 1r have the same configuration, the LED display tile 1f will be described here.

  As shown in FIGS. 4 and 5, bosses 8 with female screw holes are provided at four corners of the LED base 6 constituting the back surface of the LED display tile 1f. In addition, three fitting holes 7 that can be fitted with the fitting pins 51 of the XY position adjusting jig 50 are provided in the lower part of the LED base 6.

  The structure of the joint 10 is slightly different between the one fixed to the lower corner of the LED display tile 1f and the one fixed to the upper corner of the LED display tile 1f. The joint 10 fixed to the lower corner portion of the LED display tile 1f is composed of a bottom surface portion 10a, a front surface portion 10b, and a side surface portion 10c, and the upper, rear, and one side are formed open. Yes. The joint 10 used at the lower corner of the LED display tile 1f is further provided with a screw hole 104 in which a female screw hole boss 8 provided in the LED display tile 1f can be loosely fitted, and a screw 3 can be attached. Two fixing holes 11 are provided. The screw hole 104 is provided in the front surface part 10b. Two of the three fixing holes 11 are provided on the bottom surface portion 10a, and one is provided on the side surface portion 10c.

  As shown in FIGS. 6 and 7, the joint 10 fixed to the upper corner of the LED display tile 1f is composed of an upper surface portion 10d, a front surface portion 10b, and a side surface portion 10c. The side is formed in an open shape. The joint 10 used at the upper corner of the LED display tile 1f is further provided with a screw hole 104 in which a female screw hole boss 8 provided in the LED display tile 1f can be loosely fitted, and three screws 110 that can be attached. A fixing hole 11 is provided. The screw hole 104 is provided in the front surface part 10b. Two of the three fixing holes 11 are provided in the upper surface portion 10d, and one is provided in the side surface portion 10c.

  Hereinafter, the joint 10 is simply referred to as the joint 10 when it is not distinguished between those fixed to the lower corner of the LED display tile 1f and those fixed to the upper corner of the LED display tile 1f.

  As shown in FIGS. 4 and 5, at the connecting portion of the frame 12 d, the frame 12 b, and the joint 10, the screw 110 is fixed to the groove of the frame 12 b and the frame 12 d through the fixing hole 11 of the joint 10. It is connected by being screwed to 111.

  As shown in FIG. 7, the fitting pin 51 of the XY direction position adjusting jig 50 is guided and inserted into the fitting hole 7 provided on the back surface of the LED display tile 1e. The XY direction position adjusting jig 50 is a jig that adjusts the position of the LED display tile 1e in the XY direction, that is, in the horizontal direction and the vertical direction. The XY direction position adjusting jig 50 is configured to be detachable from the back frame unit 2 and is sequentially used for the LED display tiles 1a to 1r when the LED display tiles 1a to 1r are assembled. Therefore, the LED display tiles 1a to 1r do not need to have a mechanism for adjusting the position in the left-right direction and the up-down direction, and have a simple structure and are lightened. Details of the XY direction position adjusting jig 50 will be described later.

  Next, the 1st adjustment mechanism which adjusts the position of the Z direction of each LED display tile 1a-1r is demonstrated using FIGS. FIG. 8 is an enlarged view of a portion C in FIG. FIG. 9 is a front view of a connecting portion between the LED base 6 and the rear frame unit 2. FIG. 10 is a cross-sectional view showing a state before adjustment in the Z direction in the LED display tile 1e. FIG. 11 is a cross-sectional view showing a state in which the Z-direction adjustment of the LED display tile 1e is performed by rotating the male threaded bush 102 using the Z-direction adjustment tool 300. FIG. FIG. 12 is a cross-sectional view illustrating a state in which the joint screw 100 is rotated to fix the joint 10 to the LED base 6.

  The joint width adjusting mechanism includes a first adjusting mechanism that adjusts the position of each LED display tile 1a to 1r in the Z direction, and an X direction and a Y direction (hereinafter referred to as “XY direction”) of each LED display tile 1a to 1r. And a second adjustment mechanism for adjusting the position of the

  As shown in FIGS. 8 and 9, the first adjustment mechanism includes a bush 102 with a male screw. The male threaded bush 102 is configured to be screwed into the threaded hole 104 of the joint 10. The male threaded bush 102 is screwed into the threaded hole 104 of the joint 10, and the female threaded hole boss 8 is inserted into the male threaded bush 102. In this state, the joint 10 is coupled to the LED display tile 1e by the coupling screw 100 being screwed into the female screw hole boss 8 via the washer 101. Thereby, the LED display tile 1e is temporarily fixed.

  As shown in FIG. 9, for example, six adjustment pin insertion holes 105 are provided in the rear end portion of the bush 102 with the male screw. Six adjustment pin insertion holes 105 are provided so as to face each other three by three.

  Two elongated holes 106 formed in an arc shape are provided on the circumference of the washer 101. The two long holes 106 are provided at positions that face each other and that three adjustment pin insertion holes 105 are respectively exposed.

  Next, the adjustment allowance for the LED display tile 1e will be described. As shown in FIG. 8, the dimension a and the dimension b are adjustment margins in the Z direction of the LED display tile 1e, and the dimension a and the dimension b can be increased by loosening the connecting screw 100. Further, (φd−φc) / 2 is an adjustment margin in the XY direction of the LED display tile 1e. Here, φd is the inner diameter of the bush 102 with the male screw, and φc is the outer diameter of the boss 8 with the female screw hole. That is, (φd−φc) / 2 is the dimension of the gap between the bush 102 with the male screw and the boss 8 with the female screw hole. The dimensional relationship described here is the same for the four corners of the LED display tile 1e.

  Next, a method for adjusting the position of the LED display tile 1e in the Z direction will be described. First, the Z direction adjustment tool 300 will be described. As shown in FIG. 10, the Z-direction adjusting tool 300 includes a main body 303, a recess 302, two pins 301, and a handle 304. The main body 303 is formed in a rectangular parallelepiped shape, for example, and a recess 302 capable of accommodating the head of the connecting screw 100 is provided in a region excluding the peripheral edge of the main surface of the main body 303. Two pins 301 are provided on the peripheral edge of the main surface of the main body 303. The two pins 301 can be inserted into two of the six adjustment pin insertion holes 105, respectively. The handle 304 is provided on the surface opposite to the main surface of the main body 303.

  As shown in FIG. 10, in the default position, which is the position before adjustment in the Z direction, first, the screw 100 is loosened and the tip of the male threaded bush 102 is aligned with the front surface of the front surface portion 10 b of the joint 10. .

  Next, as shown in FIG. 11, the two pins 301 of the Z direction adjustment tool 300 are inserted into the adjustment pin insertion hole 105 of the male threaded bush 102 through the elongated hole 106 of the washer 101. Then, by rotating the Z-direction adjusting tool 300, the male threaded bush 102 is rotated, and adjustment is performed so that the LED display tile 1e moves in the Z direction.

  Since the Z-direction adjusting tool 300 can be rotated within the range of the long hole 106 formed in an arc shape, the rotation range of the Z-direction adjusting tool 300 is limited. Therefore, when the adjustment pin insertion hole 105 moves to the end of the long hole 106, the male 301 is inserted into the adjustment pin insertion hole 105 located at the opposite end of the long hole 106 while reinserting the pin 301 of the Z direction adjustment tool 300. The position of the LED display tile 1e in the Z direction is adjusted by rotating the bush 102 with the screw. When the position of the LED display tile 1e in the Z direction is determined by this adjustment, the LED display tile 1e is fixed by rotating the connecting screw 100 in the fixing direction as shown in FIG.

  With the above-described configuration, the structure for connecting the LED display tiles 1a to 1r and the rear frame unit 2 and the first adjustment mechanism for adjusting the positions of the LED display tiles 1a to 1r in the Z direction are simplified. In addition, it can be configured compactly. Furthermore, it is possible to accurately adjust the step in the Z direction of the LED display surface, that is, the joint width, which is a shift in the Z direction between the LED display tile and another adjacent LED display tile.

  Next, the 2nd adjustment mechanism which adjusts the position of the X-Y direction of each LED display tile 1a-1r is demonstrated. FIG. 13 is a view for explaining attachment / detachment of the XY position adjusting jig 50 to / from the LED display tile 1e.

  The second adjustment mechanism includes an XY position adjustment jig 50. As shown in FIG. 13, the XY position adjusting jig 50 includes a plate 52, four mounting holes 53, and three fitting pins 51. The plate 52 is composed of two plates 52a and 52b, and the plate 52b is fixed to the main surface of the plate 52a. Two attachment holes 53 are provided at both ends of the plate 52a.

  Three fitting pins 51 are provided on the main surface of the plate 52b. The three fitting pins 51 are provided at positions corresponding to the three fitting holes 7 of the LED display tile 1e, and can be inserted into the three fitting holes 7, respectively. The four attachment holes 53 are respectively provided at positions corresponding to the four nuts 111 provided in the grooves of the frame 12b. The XY position adjusting jig 50 is attached to the rear frame unit 2 by screwing the four attachment screws 112 into the four nuts 111 via the four attachment holes 53, respectively. The four nuts 111 are fixed to the grooves of the two frames 12b two by two.

  The diameters of the four mounting holes 53 are formed larger than the diameters of the shaft portions of the four mounting screws 112 so as to include an adjustment margin in the XY direction of the LED display tile 1e. Therefore, the four mounting screws 112 are loosely fitted in the four mounting holes 53, respectively.

  The XY position adjusting jig 50 is fixed to the LED display tile 1e by fitting three fitting pins 51 into the three fitting holes 7 of the LED display tile 1e. Further, the XY position adjusting jig 50 is attached to the four nuts 111 of the rear frame unit 2 by the attachment screws 112 loosely fitted in the four attachment holes 53. The XY position adjusting jig 50 is movable in the X direction and the Y direction within the range of the adjustment allowance of the LED display tile 1e in the four mounting holes 53.

  The four mounting screws 112 are respectively screwed into the four nuts 111 provided in the grooves of the frame 12b through the four mounting holes 53 of the XY position adjusting jig 50. Further, since the three fitting pins 51 of the XY position adjusting jig 50 are respectively fitted in the three fitting holes 7 of the LED display tile 1e, four XY position adjusting jigs 50 are attached. When the LED display tile 1e in the hole 53 is moved in the X direction or the Y direction within the range of the adjustment allowance, the LED display tile 1e is also moved in the X direction or the Y direction with respect to the frame 12b. Thereby, the position adjustment of the XY direction in the LED display tile 1e can be performed.

  When adjusting the position in the XY direction after installing the LED display tiles 1a to 1r, the XY position adjusting jig 50 is attached to the LED display tile to be adjusted, and the connecting screw 100 is loosened in the XY direction. Can be adjusted.

  The order of position adjustment is adjusted to the default position shown in FIG. 10 by loosening the connecting screws 100 at the four corners of the LED display tile to be adjusted. The XY position adjusting jig 50 is attached to the rear frame unit 2 of the LED display tile to be adjusted, and the position in the XY direction is adjusted. Next, by using the Z direction adjustment tool 300, the position of the front corner of the LED display tile to be adjusted in the Z direction is set to the position of the front corner of another LED display tile adjacent to the LED display tile to be adjusted. Adjustments are made to match the position in the Z direction.

  After the adjustment is completed, the LED display tile to be adjusted and the joint 10 are fixed with screws 110. In the example shown in FIG. 1, the LED display tiles are sequentially adjusted in position in the order of 1o, 1p, 1n, 1q, 1i, 1j... .

  In the embodiment, the LED display device 200 having an 18-plane configuration has been described as an example. However, in the case of an LED display device having a larger number of LED display tiles, the same assembly adjustment can be performed. .

  As described above, the LED display device 200 according to the embodiment is provided in the joint 10 or the back frame unit 2 and adjusts the joint width between the LED display tile and another adjacent LED display tile. Since the joint width adjusting mechanism is provided, the joint between the LED display tile and another adjacent LED display tile can be easily made inconspicuous by adjusting the joint width by the joint width adjusting mechanism. Thereby, the quality of the video can be improved.

  The joint width adjustment mechanism includes a first adjustment mechanism that adjusts the position of each LED display tile in the Z direction, and the first adjustment mechanism includes a male threaded bush 102 that can be screwed into the screw hole 104 of the joint 10. The bush 102 with the male thread is configured to be able to pass through the boss 8 with the female thread hole provided in each LED display tile, and the joint 10 has the bush 102 with the male thread screwed into the threaded hole 104 and the female thread. Each LED display tile is connected to each LED display tile by a connecting screw 100 screwed into the female screw hole boss 8 in a state where the hole boss 8 is inserted into the male screw bush 102. By adjusting the gap between the tile and the joint 10, the position of each LED display tile in the Z direction is adjusted.

  Therefore, the step in the Z direction of the LED display surface, that is, the joint width, which is a shift in the Z direction between the LED display tile and another adjacent display tile, can be easily and accurately adjusted.

  Moreover, since the LED display tiles 1a to 1r do not need to have a mechanism for adjusting the position in the Z direction, the LED display tiles 1a to 1r can be configured in a compact manner. In connection with this, since the LED base 6 can be reduced in weight, handling of the LED display tiles 1a to 1r is facilitated.

  Furthermore, since the depth of the LED base 6 is small and the shape is simple, it is possible to reduce the cost related to the components constituting the LED display tiles 1a to 1r. Thereby, the manufacturing cost of the LED display device 200 can be reduced.

  The joint width adjustment mechanism includes a second adjustment mechanism that adjusts the position of each LED display tile 1a to 1r in the X direction or the Y direction, and the second adjustment mechanism is provided on each LED display tile 1a to 1r and the rear frame unit 2. An XY position adjusting jig 50 that can be attached and detached is provided. The XY position adjusting jig 50 can be fitted into the mounting hole 53 and the fitting hole 7 provided in each of the LED display tiles 1a to 1r. The XY position adjusting jig 50 is fixed to each of the LED display tiles 1a to 1r by fitting the fitting pin 51 into the fitting hole 7, and the mounting hole. The back frame unit 2 is attached to the back frame unit 2 by means of mounting screws 112 loosely fitted to the 53, and the position of the XY position adjusting jig 50 in the X or Y direction is adjusted via the mounting hole 53. Each LED for Adjusting the X-direction or Y-direction position of the shown tile 1A～1r.

  Therefore, a gap that is a deviation in the X direction or the Y direction between the LED display tile and another adjacent display tile, that is, the joint width can be easily and accurately adjusted.

  Further, since the LED display tiles 1a to 1r do not need to have a mechanism for adjusting the position in the X direction or the Y direction, the LED display tiles 1a to 1r can be configured in a compact manner. In connection with this, since the LED base 6 can be reduced in weight, handling of the LED display tiles 1a to 1r is facilitated.

  Regarding the position adjustment in the X direction or the Y direction, the LED base 6 only needs to be provided with the fitting hole 7, so that the structure of the LED base 6 is simplified. Since the XY position adjusting jig 50 can be attached to and detached from the LED display tiles 1a to 1r and the rear frame unit 2, the LED display device 200 only needs to have one XY position adjusting jig 50. Well, the manufacturing cost of the LED display device 200 can be reduced.

  In the present invention, the embodiments can be appropriately modified and omitted within the scope of the invention.

  1a to 1r LED display tile, 2 rear frame unit, 7 fitting hole, 8 boss with female screw hole, 10 joint, 50 XY position adjusting jig, 51 fitting pin, 53 mounting hole, 100 connecting screw, 102 Bush with male thread, 104 threaded holes, 112 mounting screws, 200 LED display.

Claims (3)

A display device configured by arranging a plurality of display tiles in which a plurality of display elements are arranged in the vertical direction and the horizontal direction,
A frame unit for holding the back surfaces of the plurality of display tiles via joints connected to the back surfaces of the display tiles;
A joint width adjusting mechanism which is provided in the joint or the frame unit and adjusts the joint width between the display tile and another adjacent display tile;
A display device comprising: The joint width adjustment mechanism includes a first adjustment mechanism that adjusts a position in the front-rear direction of each display tile,
The first adjustment mechanism includes a bush that can be screwed into a screw hole of the joint;
The bush is configured to be able to insert a boss provided in each display tile,
The joint is connected to each display tile by a connecting screw screwed into the boss in a state where the bush is screwed into the screw hole and the boss is inserted into the bush.
The display device according to claim 1, wherein the position of each display tile in the front-rear direction is adjusted by adjusting a gap between each display tile and the joint via the bush. The joint width adjustment mechanism includes a second adjustment mechanism that adjusts the vertical or horizontal position of each display tile,
The second adjustment mechanism includes a position adjustment jig that can be attached to and detached from each display tile and the frame unit.
The position adjusting jig has a mounting hole and a fitting pin that can be fitted into a fitting hole provided in each display tile,
The position adjusting jig is fixed to each display tile by fitting the fitting pin into the fitting hole, and is attached to the frame unit by a mounting screw loosely fitted into the mounting hole.
The vertical or horizontal position of each display tile with respect to the frame unit is adjusted by adjusting the vertical or horizontal position of the position adjusting jig through the mounting hole. Item 3. The display device according to Item 2.

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