Tile display device

Abstract

Tile display device (100) comprising several display panel modules (600; DP1, DP2, DP3, DP4), each display panel module comprising: a display board (200) comprising a display area (A / A) and a non-display area (B / A), wherein the display board (200) comprises at least one bending section (BEN); a form support element (300) which is glued to an underside of the scoreboard (200) and which carries the shape of the scoreboard (200), wherein the form support element (300) comprises a stepped section (320); a fastening element (400) that is attached to a bottom side of the mold support element (300); and a housing top part (500) which is coupled to the fastening element (400) on a side surface of the fastening element (400), wherein the multiple display panel modules (600; DP1, DP2, DP3, DP4) are mounted in a housing (700), wherein at least one side of each scoreboard module (600; DP1, DP2, DP3, DP4) overlaps an adjacent scoreboard module (600; DP1, DP2, DP3, DP4) and the surfaces of the scoreboard modules (600; DP1, DP2, DP3, DP4) are in the same line, wherein a bending section (BEN) of one of two adjacent display board modules (600; DP1, DP2, DP3, DP4) and a stepped section (320) of the other display board module (600; DP1, DP2, DP3, DP4) overlap each other.

Description

BACKGROUND OF THE INVENTION Area of ​​the invention

[0001] The present invention relates to a tile display device. State of the art

[0002] With the development of the information society, various demands for display devices for showing images are on the rise. In the field of display devices, bulky cathode ray tubes (CRTs) have been rapidly replaced by flat panel displays (FPDs), which are thin, lightweight, and capable of covering a large area. Flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emission displays (OLEDs), electrophoretic displays (EDs), and others.

[0003] Among these types of displays, organic light emission displays are self-illuminating devices, exhibiting a fast response time, high light emission efficiency, high brightness, and wide viewing angles. In particular, organic light emission displays can be manufactured on a flexible substrate, offering advantages over plasma displays or inorganic electroluminescent (EL) displays in that they can operate at low voltages, have lower power consumption, and provide vivid color reproduction.

[0004] Multiple organic light emission displays can be connected together and used as a tile display device, which is available in a large size.

[0005] DE 11 2014 001 157 T5 describes a reflective display device with a flexible display field and driver electronics for controlling the flexible display field, wherein the flexible display field comprises at least one first and second flexible display unit that are adjacent. In one variant, an edge region of the first display unit has an extension beyond the display layer of the first display unit, the extension being attached to the first driver electronics unit; and the second display unit overlaps the first display unit. Thus, the second display unit can overlap the first display unit in such a way that the first driver electronics unit lies behind the second display unit. Therefore, one display unit is curved to extend partially under an adjacent display unit.For example, the end faces of adjacent display units lie in a substantially common plane at a transition point between them, for example, exactly flush. In one example, the display device comprises three sets consisting of a substrate, an active area, and a display medium, as well as a top layer in the form of a UV-blocking, hard-coated anti-glare window, a refractive index-matching planarizing layer between the display medium and the window, and a plug connection from a substrate extension of each set, the plug connection being to an electronic unit.

[0006] EP 3 125 026 B1 describes a display device with a display unit and a housing which accommodates a lower section of the display unit.

[0007] Fig. Figure 1 is a top view showing a conventional tile display device. Fig. 2A is a cross-sectional view showing area A in Fig. 1 shows, while Fig. 2B is a cross-sectional view showing area B in Fig. 1 shows. In Fig. 1. A tile display device 10 can comprise several display panel modules 20, 30, and 40. For example, nine display panel modules in a 3 × 3 arrangement can form a single tile display device 10, as shown in Fig. Figure 1 shows that in a case where several display modules are located in the same plane, boundary sections are visible where no images are displayed due to the borders of the display modules. Accordingly, the tile display device 10 is configured such that some of the display modules overlap in order to minimize the boundary sections between the display modules where no images are displayed. As in the Fig. 2A and Fig. As shown in Figure 2B, each display panel module 20, 30, and 40 has a display area A / A where images are shown. Below them, display panel modules 20 and 30 lie on the left and right sides in the same plane, respectively, with a boundary section BW, where no images are displayed, due to the borders of display panel modules 20 and 30. Display panel modules 30 and 40 overlap each other on the top and bottom surfaces, thus creating both a vertical height difference SH and the boundary section BW.

[0008] Therefore, due to the border section BW and the vertical height difference SH, the display quality on the display board modules may deteriorate. SUMMARY OF THE INVENTION

[0009] It is therefore an object of the present invention to provide a tile display device that can improve the display quality by minimizing the boundary sections between the display panel modules and eliminating vertical height differences. This object is achieved by the subject matter of the independent claim. Further advantageous embodiments and refinements are described in the respective dependent claims.

[0010] According to one aspect of the present disclosure, a tile display device is provided comprising several display module units, each unit comprising: a display unit comprising a display area and a non-display area; a mold support element bonded to a bottom surface of the display unit and supporting the shape of the display unit; a fastening element combined with or attached to a bottom surface of the mold support element; and a housing top coupled to the fastening element at a side surface of the fastening element, wherein the several display module units are mounted in a housing, with at least one side of each display module overlapping an adjacent display module and the surfaces of the display modules being in the same line. The surfaces of the display modules may be flush.In other words, there is no height difference between the surfaces of two scoreboard modules. The non-display area of ​​the scoreboard can include at least one bent section. The bent section can be formed on at least two sides of the non-display area to which a printed circuit board is connected.

[0011] The form support element includes a stepped section. The stepped section may have a small thickness. The stepped section may be arranged adjacent to the bending section, with the display area of ​​the scoreboard inserted or positioned between them.

[0012] A bending section of one of two adjacent display board modules and a stepped section of the other display board module can overlap.

[0013] The tile display device can further comprise a cushioning element located between the bent section and the stepped section. The cushioning element can comprise a resin that fills the gaps between at least two display module modules whose bent section and stepped section overlap. That is to say, two display module modules can have their respective bent section and their respective stepped section overlapping each other.

[0014] On all sides of the non-display area of ​​the scoreboard, the sides to which a printed circuit board is attached may be wider than the adjacent sides with the display area inserted or arranged between them. The non-display area of ​​the scoreboard may be asymmetrical in width.

[0015] In the scoreboard, bend sections can be separated from each other in an area where the bend sections are adjacent. Two bend sections contained in the non-display area of ​​the same scoreboard can be separated from each other in an area where the bend sections are adjacent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and which are incorporated into and form part of this description, illustrate the embodiments of the invention and, together with the description, serve to explain the principles of the invention; they show: Fig. 1 a top view showing a conventional tile display device; Fig. 2A a cross-sectional view showing area A in Fig. 1 shows, and Fig. 2B a cross-sectional view showing area B in Fig. 1 shows; Fig. 3 a perspective view showing a tile display device according to an exemplary embodiment of the present invention; Fig. 4 a perspective view showing a display board according to an exemplary embodiment of the present invention; Fig. 5 a perspective view showing a form support element according to an exemplary embodiment of the present invention; Fig. 6 a perspective view showing a fastening element according to an exemplary embodiment of the present invention; Fig. 7 a cross-sectional view showing a structure to hold together the form support element and the fastening element according to an exemplary embodiment of the present invention; Fig. 8 a perspective view showing the display panel, the form support element and the fastening element held together according to an exemplary embodiment of the present invention; Fig. 9 is a perspective view showing a housing top part according to an exemplary embodiment of the present invention; Fig. 10 a cross-sectional view showing a display panel module according to an exemplary embodiment of the present invention; Fig. 11 a view showing each process of a method for manufacturing a display board according to an exemplary embodiment of the present invention; Fig. 12 a cross-sectional view showing a display panel module according to an exemplary embodiment of the present invention; Fig. 13 a top view of several display board modules mounted in a housing; and Fig. 14 a view that shows one along line II' in Fig. The 13th cross-section shown. DESCRIPTION OF EXAMPLE FORMS OF EXECUTION

[0017] Exemplary embodiments of the present invention are described in detail below with reference to the accompanying drawings. Throughout the description, identical reference numerals denote essentially identical components. When describing the present invention, a detailed description of known functions or configurations relating to the present invention is omitted if it is assumed that they might unnecessarily obscure the subject matter of the present invention. The names of the elements used in the following description may have been chosen for ease of writing and may differ from the names of parts in actual products.

[0018] A display panel according to the present invention is a display panel in which the display elements are formed on a flexible substrate. Although examples of display panels include an organic light emission display, a liquid crystal display, and an electrophoretic display, etc., the present invention is described with respect to an organic light emission display. The organic light emission display comprises an organic layer consisting of organic materials located between a first electrode as an anode and a second electrode as a cathode. A hole from the first electrode and an electron from the second electrode recombine within the organic layer, forming an exciton, i.e., a hole-electron pair. Energy is then generated when the exciton returns to the ground state, causing the display device itself to emit light.

[0019] Fig. Figure 3 is a perspective view showing a tile display device according to an exemplary embodiment of the present invention.

[0020] In Fig. Figure 3 comprises a tile display device 100 according to an exemplary embodiment of the present invention, a display panel module 600 comprising a display panel 200, a form support element 300 glued to the underside of the display panel 200, a fastening element 400 that secures the form support element 300 to itself from below, and a housing top 500 attached to the fastening element 400. Several display panel modules 600 are mounted in a housing 700 to form the tile display device 100.

[0021] The display panel 200 comprises a display area A / A, which shows an image, and a (not shown) non-display area outside the display area A / A. The display panel 200 of the present invention can be a flexible display panel 200 with a printed circuit board in which the non-display area is bent on at least two sides. The form support element 300 is bonded to the display panel 200 to support the shape of the display panel 200, so that the flexible structure of the display panel 200 maintains a given shape. The fastening element 400 secures the form support element 300, which is bonded to the display panel 200, to itself, so that the display panel module 600 is attached to the housing 700. The housing upper part 500 contains the display panel 200, the form support element 300, and the fastening element 400.The housing 700 serves as a support substrate, with the display panel modules 600, comprising the display panel 200, the form support element 300, the fastening element 400 and the housing top 500, being held together to form a tile display device.

[0022] The components of the tile display device 100 constructed in this way, according to an exemplary embodiment of the present invention, are described in more detail below.

[0023] Fig. Figure 4 is a perspective view showing a display board according to an exemplary embodiment of the present invention. Fig. Figure 5 is a perspective view showing a form support element according to an exemplary embodiment of the present invention. Fig. Figure 6 is a perspective view showing a fastening element according to an exemplary embodiment of the present invention. Fig. Figure 7 is a cross-sectional view showing a structure for holding together the form support element and the fastening element according to an exemplary embodiment of the present invention. Fig. Figure 8 is a perspective view showing the display panel, the form support element and the fastening element held together according to an exemplary embodiment of the present invention. Fig. Figure 9 is a perspective view showing a housing top according to an exemplary embodiment of the present invention. Fig. Figure 10 is a cross-sectional view showing a display panel module according to an exemplary embodiment of the present invention.

[0024] In Fig. The display panel 200 comprises a display area A / A, which shows an image, and a non-display area B / A outside of display area A / A. Display area A / A includes several sub-image points that operate to display an image. The sub-image points include red sub-image points, green sub-image points, and blue sub-image points, or white sub-image points, red sub-image points, green sub-image points, and blue sub-image points. Depending on their emission characteristics, the sub-image points can have one or more different emission ranges. Each sub-image point includes a switching transistor, a drive transistor, a capacitor, and an organic light-emitting diode (OLED). In response to a sampling signal supplied via a gate line, the switching transistor performs a switching operation, so that a data signal supplied via the data line is stored as a data voltage in the capacitor.The driver transistor operates such that, in response to the data voltage stored in the capacitor, a drive current flows between a power supply line (a high-level voltage) and a cathode power supply line (a low-level voltage). The organic light-emitting diode (OLED) then emits light through this drive current generated by the driver transistor. The non-display section B / A comprises a data driver that applies a data signal to the sub-pixels and a sampler driver that applies a sample signal to the sub-pixels.

[0025] In the display panel 200, the printed circuit boards (PCBs) are connected by a flexible printed circuit board (FPC) with at least two sides of the non-display area B / A. The display panel 200 of the present invention can be a flexible display panel 200 with a printed circuit board in which the non-display area B / A is bent on at least two sides.

[0026] In the display panel 200 according to an exemplary embodiment of the present invention, the non-display area B / A can be asymmetrical in width. More specifically, the non-display area B / A of the display panel 200 comprises a first side (a), which is one of the long sides, a second side (b), which faces the first side (a), a third side (c), which is one of the short sides, and a fourth side (d), which faces the third side (c). The second side (b) and the fourth side (d) can be the sides to which the printed circuit board (PCB) is connected. The second side (b) is wider than the first side (a) because a connection area for connecting to the PCB is located on the second side (b). The fourth side (d) is also wider than the third side (c) because a connection area is located on the fourth side (d).This means that on all sides of the non-display area B / A of the display panel 200, the sides to which the printed circuit board PCB is attached can be wider than the adjacent sides between which the display area A / A is located.

[0027] The second side (b) and the fourth side (d) of the non-display area B / A each comprise a bending section BEN. The bending section BEN is a section that overlaps an adjacent display section 200, which may be formed by the flexibility of the flexible display panel. A more detailed description will be given later.

[0028] The second side (b) includes, in addition to the bending area BEN, a (2-1)th side (b1) visible to the user, and the fourth side (d) also includes a (4-1)th side (d1). In this case, the (2-1)th side (b1), which is adjacent to another display panel 200, is narrower than the first side (a), while the (4-1)th side (d1) is narrower than the third side (c). Therefore, the boundary section between adjacent display panels 200 can be minimized, thereby improving the display quality visible to the user.

[0029] The display panel 200 has a separation section 220 where the second side (b) and the fourth side (d) are not connected to each other, i.e., separated from each other, so that the bending sections BEN are formed on the second side (b) and the fourth side (d), respectively. That is, the display panel 200 includes a separation section 220 where the bending sections BEN are adjacent to each other and separated from each other. The separation section 220 is an area formed by cutting the connecting section of the second side (b) and the fourth side (d) by laser cutting or the like. Conventionally, due to the separation section, there are LOG areas where LOG wires are arranged, whereas in the present invention, the separation section 220 can be formed by arranging the GIP driver within the display area A / A, so that the LOG wires are arranged within the display area A / A.

[0030] In the display panel 200 according to an exemplary embodiment of the present invention, the bending sections BEN are formed on at least two sides of the non-display area B / A, to which the printed circuit boards PCB are connected, wherein the form support element 300 is glued to the underside to maintain the shape of the bending section BEN.

[0031] In Fig. 5. The form support element 300 is glued to the scoreboard 200 to support the shape of the scoreboard 200, so that the flexible structure of the scoreboard 200 maintains a given shape. For this purpose, at least two sides of the form support element 300 have an inclined surface 330. That is, two sides of the form support element 300, corresponding to the second side (b) and the fourth side (d) of the scoreboard 200, have an inclined surface 330. Accordingly, the scoreboard 200, which is to be glued to the form support element 300, can maintain its shape, since the second side (b) and the fourth side (d) are glued along the inclined surfaces 330 of the form support element 300.

[0032] On the underside of the form support element 300, several first projections 310 can be formed, projecting downwards to be combined with or attached to the fastening element 400. Furthermore, a first stepped section 320 is formed on the other two sides, except for the two sides with a curved cross-section, the thickness of which is small. The first stepped section 320 is an area that overlaps a curved section BEN of an adjacent display panel. The first stepped section 320 is arranged adjacent to the curved sections 320, with the display area A / A of the display panel 200 positioned between them.

[0033] The form support element 300, to which the display panel 200 is glued, is secured or attached to the fastening element 400.

[0034] In Fig. 6. The fastening element 400 secures the form support element 300, which is glued to the display panel 200, to itself. Consequently, the display panel module 600 can be combined with or attached to the housing 700. First recesses 410 are formed in the upper surface of the fastening element 400, through which the first projections 310 of the form support element 300 are inserted. Second projections 420 are formed in the lower surface, allowing it to be combined with the housing 700. Furthermore, second recesses 430 are formed on each side of the fastening element 400, allowing it to be combined with the housing upper part 500. The fastening element 400 also has a second stepped section 440, which is thin to create a space to facilitate easy attachment of the fastening element 400 to the housing upper part 500.

[0035] In Fig. 7. The mold support element 300 and the fastening element 400 are held together by the screws 450. That is, the first projections 310 of the mold support element 300 are inserted into the first recesses 410 of the fastening element 400, with the screws 450, which penetrate the underside of the fastening element 400, being inserted into the first projections 310 of the mold support element 300, thereby holding the mold support element 300 and the fastening element 400 together. As in Fig. As shown in Figure 8, the display panel 200, the form support element 300 and the fastening element 400 are held together accordingly.

[0036] The display panel 200, the form support element 300 and the fastening element, which are held together, are contained in the housing top part 500.

[0037] In Fig. 9 The housing top 500 serves to contain the display panel 200, the mold support element 300, and the fastening element 400. The housing top 500 can have an 'L'-shaped' cross-sectional structure, so that the top and bottom are open and the sides cover the display panel 200, the mold support element 300, and the fastening element 400. Several first holes 510 are formed on each side of the housing top 500 so that they are combined with the fastening element 400 by means of the screws 520.

[0038] The display panel 200, the form support element 300 and the fastening element 400, which are held together, are contained in the housing top part 500 to form a display panel module 600.

[0039] In Fig. The display panel 200 is glued to the form support element 300, and the form support element 300 is secured to the mounting element 400, all of which are integrated into the display panel module 600. The flexible printed circuit board (FPC) and the printed circuit board (PCB) of the display panel 200 are bent under the mounting element 400.

[0040] The upper housing part 500 covers the sides of the fastening element 400, with the screws 520 passing through the first holes 510 of the upper housing part 500 and being fastened to the second recesses 430 of the fastening element 400, thereby containing the display panel 200, the form support element 300, and the fastening element 400 within the upper housing part 500. The display panel module 600, according to an exemplary embodiment of the present invention, is configured as such.

[0041] The following is a description of the display panel module 600 described above, which is combined with the housing 700 to form a tile display device.

[0042] Fig. Figure 11 is a view showing each process of a method for manufacturing a display board according to an exemplary embodiment of the present invention. Fig. Figure 12 is a cross-sectional view showing a display panel module according to an exemplary embodiment of the present invention. Fig. Figure 13 is a top view of several display board modules mounted in a housing. Fig. 14 is a view that shows one along line II' in Fig. The 13th cross-section shown.

[0043] In Fig. 11. A display panel 200 with a display area A / A and a non-display area B / A is manufactured, wherein a flexible printed circuit board (FPC) with a printed circuit board (PCB) attached to it is mounted to the pad sections on two sides of the non-display area B / A of the display panel 200. Next, the corner connecting the two sides of the non-display area B / A to the attached flexible printed circuit board is removed by laser cutting. Subsequently, the two sides of the non-display area B / A to which the flexible printed circuit board (FPC) is attached are bent to form the bend sections (BEN).

[0044] In Fig. 12. The mold support element 300 is glued to the underside of the manufactured display board 200 with an adhesive. Because the mold support element 300 has inclined surfaces 330 in the areas corresponding to the bend sections BEN of the display board 200, the bend sections BEN of the display board 200 are partially glued to the inclined surfaces 330 of the mold support element 300, thereby maintaining their shape.

[0045] The fastening element 400 is attached to the underside of the mold support element 300, which in turn is attached to the housing top part 500. The printed circuit board (PCB) and the flexible printed circuit board (FPC) of the display panel 200 are bent under the fastening element 400. Accordingly, the display panel 200, the mold support element 300, the fastening element 400, and the housing top part 500 are held together to form a display panel module 600.

[0046] In Fig. 13. Several display board modules are combined sequentially on the housing 700. For example, a description is given of a structure in which a first display board module DP1, a second display board module DP2, a third display board module DP3 and a fourth display board module DP4 are combined on the housing 700.

[0047] In Fig. 14 The first scoreboard module DP1 is arranged on the housing 700 and fastened with the screws 720 to the second projections 420 of the fastening element 400 via the second holes 710 formed in the housing 700. The second scoreboard module DP2 is fastened to the housing 700 in the same way as the first scoreboard module DP1.

[0048] Here, a bent section of one of two adjacent scoreboard modules and a stepped section of the other scoreboard module are configured to overlap. For example, a stepped section 320 formed on the mold support element 300 of the second scoreboard module DP2 overlaps a bent section BEN of the first scoreboard module DP1, such that the surfaces of the first scoreboard module DP1 and the second scoreboard module DP3 are in the same line. That is, the surfaces of the first scoreboard module DP1 and the second scoreboard module DP3 are flush. Likewise, the third scoreboard module DP3 is combined with the underside of the first scoreboard module DP1. As explained above, a stepped section formed on the mold support element of the third scoreboard module DP3 overlaps a bent section of the first scoreboard module DP1.The fourth scoreboard module DP4 is combined with the underside of the second scoreboard module DP2. The stepped sections formed on the support element of the fourth scoreboard module DP4 overlap a bending section of the second scoreboard module DP2 or a bending section of the third scoreboard module DP3.

[0049] The first through fourth scoreboard modules DP1 to DP4 have gaps between them, even where they overlap. These gaps are filled with a transparent or opaque resin 800 to prevent them from being visible. Furthermore, a cushioning element 810 can be provided to prevent impacts in the overlapping areas of the first through fourth scoreboard modules DP1 to DP4—for example, between a bending section BEN of the first scoreboard module DP1 and a stepped section 320 of the second scoreboard module DP2. The cushioning element 810 can be any flexible material, such as rubber.

[0050] As can be seen from the above, a tile display device according to an exemplary embodiment of the present invention offers the advantages of minimizing the boundary sections between the display panel modules and eliminating the vertical height differences by using a flexible display panel in which part of the non-display area is curved and overlaps an adjacent display panel.

[0051] Although the embodiments have been described with respect to a number of their illustrative embodiments, it should be recognized that those skilled in the field could develop numerous other modifications and embodiments that fall within the scope of protection of the principles of this disclosure. In particular, various variations and modifications in the component parts and / or arrangements of the combined arrangement of the subject matter are possible within the scope of protection of the disclosure, the drawings, and the accompanying claims. In addition to the variations and modifications in the component parts and / or arrangements, alternative uses are also obvious to those skilled in the field.

Claims

[1] Tile display device (100) comprising several display panel modules (600; DP1, DP2, DP3, DP4), each display panel module comprising: a display board (200) comprising a display area (A / A) and a non-display area (B / A), wherein the display board (200) comprises at least one bending section (BEN); a form support element (300) which is glued to an underside of the scoreboard (200) and which carries the shape of the scoreboard (200), wherein the form support element (300) comprises a stepped section (320); a fastening element (400) that is attached to a bottom side of the mold support element (300); and a housing top part (500) which is coupled to the fastening element (400) on a side surface of the fastening element (400), wherein the multiple display panel modules (600; DP1, DP2, DP3, DP4) are mounted in a housing (700), wherein at least one side of each scoreboard module (600; DP1, DP2, DP3, DP4) overlaps an adjacent scoreboard module (600; DP1, DP2, DP3, DP4) and the surfaces of the scoreboard modules (600; DP1, DP2, DP3, DP4) are in the same line, wherein a bending section (BEN) of one of two adjacent display board modules (600; DP1, DP2, DP3, DP4) and a stepped section (320) of the other display board module (600; DP1, DP2, DP3, DP4) overlap each other. [2] Tile display device (100) according to claim 1, wherein the non-display area of ​​the display panel (200) comprises at least one bending section (BEN). [3] Tile display device (100) according to claim 2, wherein the at least one bending section is formed on at least two sides of the non-display area to which a printed circuit board (PCB) is connected. [4] Tile display device (100) according to one of the preceding claims, wherein the stepped section (320) is arranged adjacent to the bending section (BEN), wherein the display area (A / A) of the display panel (200) is arranged between them. [5] Tile display device (100) according to one of the preceding claims, further comprising a cushioning element (800) located between the bending section (BEN) and the stepped section (320). [6] Tile display device (100) according to one of the preceding claims, which further comprises a resin that fills the gaps between at least two display panel modules (600; DP1, DP2, DP3, DP4) whose bending section (BEN) and whose stepped section (320) overlap each other. [7] Tile display device according to any one of claims 2 to 6, wherein two bending sections (BEN) contained in the non-display area of ​​the same display panel (200) are separated from each other in an area where the two bending sections (BEN) are adjacent to each other. [8] Tile display device according to one of the preceding claims, wherein on all sides of the non-display area of ​​the display board (200) the sides to which a printed circuit board (PCB) is connected are wider than the adjacent sides with the display area (A / A) arranged between them, and / or wherein the non-display area of ​​the display board (200) is asymmetrical in width.

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