# US 12,111,528 B2 · Tiling display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,111,528 B2 - Document ID: US12111528B2 - Status: Granted - Kind: B2 - Application number: 17/377,165 - Filed: 2021-07-15 - Published: 2022-02-24 - Granted: 2024-10-08 - Earliest claimed: 2020-08-19 - Assignees: LG Display Co., Ltd. - Applicants: LG Display Co., Ltd. - Inventors: JungJae Kim; SoonDong Cho; JaeWon Han; MinGyu Park - Web page: https://patentgrep.com/patent/US12111528B2 ## CPC - G02F 1/13336: {Combining plural substrates to produce large-area displays, e.g. tiled displays} - G06F 3/1446: {display composed of modules, e.g. video walls} - G06F 3/147: using display panels - H05K 1/142: {Arrangements of planar printed circuit boards in the same plane, e.g. auxiliary printed circuit insert mounted in a main printed circuit} - H05K 1/148: {Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means} - H10K 59/18: Tiled displays - G09G 2300/026: Video wall, i.e. juxtaposition of a plurality of screens to create a display screen of bigger dimensions - H05K 1/147: {at least one of the printed circuits being bent or folded, e.g. by using a flexible printed circuit (H05K1/148 takes precedence)} - H05K 1/189: characterised by the use of flexible or folded printed circuits - H05K 2201/09227: Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting - H05K 2201/09236: Parallel layout - H05K 2201/10128: Display - H10K 59/131: Interconnections, e.g. wiring lines or terminals - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) ## Abstract A tiling display device comprises a plurality of display devices, and a main circuit board driving the plurality of display devices. Each of the plurality of display devices includes a display panel that displays an image, a plurality of flexible films bonded to a rear surface of the display panel, and a printed circuit board electrically connected to the plurality of flexible films. A plurality of printed circuit boards of the plurality of display devices are cascaded to each other and the plurality of printed circuit boards have a same shape. Therefore, the efficiency of a manufacturing process of the plurality of printed circuit boards provided in a tiling display device can be improved. ## Claims ### Claim 1 A tiling display device, comprising: a plurality of display devices; and a main circuit board driving the plurality of display devices, wherein each of the plurality of display devices includes, a display panel that displays an image; one or more flexible films bonded to a rear surface of the display panel; and a printed circuit board electrically connected to the one or more flexible films, wherein a plurality of printed circuit boards of the plurality of display devices are cascaded to each other, wherein the plurality of printed circuit boards have a same shape, wherein a first printed line to an n-th printed line are disposed on each of the plurality of printed circuit boards, where n is a natural number of 2 or more, and wherein the first printed line to an m-th printed line of a first printed circuit board are respectively connected to a (m+1)th printed line to a 2m-th printed line of a second printed circuit board adjacent to the first printed circuit board, where m is a natural number less than n or equal to n, and wherein the display panel includes a micro-light emitting diode (LED), the micro-LED including an n-type semiconductor layer, a p-type semiconductor layer, and a light emitting layer. ### Claim 2 (depends on 1) The tiling display device of claim 1, further comprising: a plurality of first connection lines connecting the main circuit board to the plurality of printed circuit boards, and a plurality of second connection lines connecting the plurality of printed circuit boards. ### Claim 3 (depends on 2) The tiling display device of claim 2, wherein a first printed line to an n-th printed line are disposed on each of the plurality of printed circuit boards, where n is a natural number of 2 or more, wherein the first printed line to an m-th printed line are respectively connected to the one or more flexible films through a plurality of pads, where m is a natural number less than or equal to n. ### Claim 4 (depends on 3) The tiling display device of claim 3, wherein the first printed line to the m-th printed line of a first printed circuit board are respectively connected to a (m+1)th printed line to a 2m-th printed line of a second printed circuit board adjacent to the first printed circuit board. ### Claim 5 (depends on 3) The tiling display device of claim 3, wherein each of the plurality of printed circuit boards comprises: a first linear area including a first portion of a plurality of printed lines that extend in a linear direction that is parallel to a side of the printed circuit board; a diagonal area including a second portion of the plurality of printed lines that extend from the first portion of the plurality of printed lines in the first linear area, and the second portion of the plurality of printed lines extending in a diagonal direction that intersects the linear direction; and a second linear area including a third portion of the plurality of printed lines that extend from the second portion of the plurality of printed lines in the diagonal area, and the third portion of the plurality of printed lines extending in the linear direction, wherein the diagonal area is between the first linear area and the second linear area. ### Claim 6 (depends on 5) The tiling display device of claim 5, wherein each of the plurality of second connection lines extends in the linear direction. ### Claim 7 (depends on 3) The tiling display device of claim 3, wherein each of the first printed line to the n-th printed line extends in a linear direction that is parallel to a side of at least one of the plurality of printed circuit boards. ### Claim 8 (depends on 7) The tiling display device of claim 7, wherein the plurality of printed circuit boards including a first printed circuit board of a first display device and a second printed circuit board of a second display device adjacent to the first display device, wherein a plurality of second connection lines between the first printed circuit board and the second printed circuit board, the plurality of second connection lines electrically connecting together first printed lines of the first printed circuit board and second printed lines of the second printed circuit board, the first printed lines and the second printed lines extending in a direction that is parallel to a side of the first printed circuit board and a side of the second printed circuit board, wherein the plurality of second connection lines extend in a diagonal direction that intersects the direction of first printed lines and the second printed lines, wherein each of the plurality of second connection lines extends in a diagonal direction that intersects the linear direction. ### Claim 9 (depends on 3) The tiling display device of claim 3, wherein a compensation printed circuit is connected to each of the first printed line to the m-th printed line. ### Claim 10 (depends on 9) The tiling display device of claim 9, wherein the compensation printed circuit includes a compensation resistor and a compensation capacitor that are connected in series. ### Claim 11 (depends on 10) The tiling display device of claim 10, wherein a capacitance value of the compensation capacitor is (parasitic capacitance)×(1/(k2−1)), and a resistance value of the compensation resistor is (parasitic inductance/parasitic capacitance)1/2, where k is a natural number. ### Claim 12 (depends on 1) The tiling display device of claim 1, wherein each of the plurality of display devices further includes a binding member disposed on the rear surface of the display panel to support and protect the display panel.