# US 2008/0186293 A1 · Display device including wiring board > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0186293 A1 - Document ID: US20080186293A1 - Status: Published application - Kind: A1 - Application number: 11/902,464 - Filed: 2007-09-21 - Published: 2008-08-07 - Earliest claimed: 2006-09-29 - Assignees: Toshiba Matsushita Display Technology Co., Ltd. - Inventors: Kazuaki Igarashi; Hirokazu Okamoto - Web page: https://patentgrep.com/patent/US20080186293A1 ## CPC - G09G 3/3611: {Control of matrices with row and column drivers} - 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 1/181: associated with surface mounted components - H05K 3/361: {Assembling flexible printed circuits with other printed circuits} - H05K 2201/052: Branched - H05K 2201/09227: Layout details of a plurality of traces, e.g. escape layout for Ball Grid Array [BGA] mounting - H05K 2201/09254: Branched layout - 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) - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS ## Abstract A display device includes a display panel including a display area, a first driving IC chip and a second driving IC chip, which are disposed with an interval along an end edge of the display panel, a cascade wiring line which connects the first driving IC chip and the second driving IC chip on the display panel, and a wiring board with a comb-shaped end portion having a first projection portion and a second projection portion, the wiring board being connected to the display panel such that the first projection portion and the second projection portion are electrically connected to the first driving IC chip and the second driving IC chip, with the cascade wiring line being interposed between the first projection portion and the second projection portion, wherein the cascade wiring line is exposed from the wiring board. ## Claims ### Claim 1 A display device comprising: a display panel including a display area; a first driving IC chip and a second driving IC chip, which are disposed with an interval along an end edge of the display panel; a cascade wiring line which connects the first driving IC chip and the second driving IC chip on the display panel; and a wiring board with a comb-shaped end portion having a first projection portion and a second projection portion, the wiring board being connected to the display panel such that the first projection portion and the second projection portion are electrically connected to the first driving IC chip and the second driving IC chip, with the cascade wiring line being interposed between the first projection portion and the second projection portion, wherein the cascade wiring line is exposed from the wiring board. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the first projection portion and the second projection portion are connected via an anisotropic conductive film, and the cascade wiring line is exposed from the anisotropic conductive film. ### Claim 3 (depends on 1) The display device according to claim 1, wherein each of the first projection portion and the second projection portion is covered with a reinforcement plate having heat resistance. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the reinforcement plate is formed of polytetrafluoroethylene resin. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the wiring board includes first wiring lines which are disposed on one surface of a base film, extend to the first projection portion and the second projection portion, and are connected to the first driving IC chip and the second driving IC chip, and second wiring lines which are disposed on the other surface of the base film and are electrically connected to the first wiring lines via through-holes. ### Claim 6 (depends on 5) The display device according to claim 5, further comprising: bumps which are disposed adjacent to the cascade wiring line on the display panel, and are connected to power bus lines which supply power to the first driving IC chip and the second driving IC chip, wherein the first wiring lines are connected to the bumps. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the display panel includes, in the display area, scanning lines which are disposed along rows of pixels that are arrayed in a matrix, signal lines which are disposed along columns of the pixels, and switching elements which are disposed at intersections between the scanning lines and the signal lines, and at least a part of a signal line driving unit, which supplies driving signals to the signal lines, is composed of the first driving IC chip and the second driving IC chip. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the display panel is a liquid crystal display panel in which a liquid crystal layer is held between a pair of substrates. ### Claim 9 A wiring board which is connected to a display panel, the wiring board comprising a comb-shaped end portion having a recess portion and a projection portion, wherein the projection portion includes a wiring line which is electrically connected to the display panel via an anisotropic conductive film, and the recess portion is formed in a manner that a wiring line on the display panel is exposed when the wiring board is connected to the display panel.