# US 2014/0192274 A1 · Liquid crystal display device equipped with built-in touch panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192274 A1 - Document ID: US20140192274A1 - Status: Published application - Kind: A1 - Application number: 14/147,710 - Filed: 2014-01-06 - Published: 2014-07-10 - Earliest claimed: 2013-01-10 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Yasushi NAKANO - Web page: https://patentgrep.com/patent/US20140192274A1 ## CPC - G02F 1/13338: {Input devices, e.g. touch panels} - G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/0445: {using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer} - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06F 3/0448: {Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality} - 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) ## Abstract A liquid crystal display device equipped with a built-in touch panel includes a second substrate on which a wiring pattern for configuring a touch panel is formed, and a flexible wiring substrate joined to the second substrate with an overlap portion, and electrically connected to the wiring pattern. The flexible wiring substrate is formed of a multilayer substrate having a first conductive pattern layer having a plurality of terminal portions electrically connected onto the wiring pattern, a second conductive pattern layer, an insulating layer interposed between the first conductive pattern layer and the second conductive pattern layer, and a plurality of contact portions that penetrates through the insulating layer, and electrically connects the plurality of terminal portions to the second conductive pattern layer. The plurality of contact portions is arranged to overlap with the plurality of terminal portions. ## Claims ### Claim 1 A liquid crystal display device equipped with a built-in touch panel, comprising: a first substrate on which a circuit layer for driving a liquid crystal material is formed; a second substrate on which a wiring pattern for configuring a touch panel is formed; and a flexible wiring substrate joined to have a portion overlapped with the second substrate, and electrically connected to the wiring pattern, wherein the flexible wiring substrate is formed of a multilayer substrate having a first conductive pattern layer having a plurality of terminal portions electrically connected onto the wiring pattern, a second conductive pattern layer, an insulating layer interposed between the first conductive pattern layer and the second conductive pattern layer, and a plurality of contact portions that penetrates through the insulating layer, and electrically connects the plurality of terminal portions to the second conductive pattern layer, and wherein the contact portion is arranged to overlap with the terminal portion. ### Claim 2 (depends on 1) The liquid crystal display device equipped with a built-in touch panel according to claim 1, wherein the flexible wiring substrate includes an overlap portion overlapped with the second substrate, and a leading portion led from at least one of both ends of the overlap portion in a length direction of the overlap portion with the avoidance of an intermediate portion thereof to intersect with the length direction, wherein the overlap portion overlaps with an end placed on one side of the second substrate in a longitudinal direction, and extended in a lateral direction, and wherein the length direction of the overlap portion and the lateral direction of the second substrate match each other. ### Claim 3 (depends on 2) The liquid crystal display device equipped with a built-in touch panel according to claim 2, wherein the leading portion is led from one of the both ends of the overlap portion in the length direction thereof. ### Claim 4 (depends on 2) The liquid crystal display device equipped with a built-in touch panel according to claim 2, wherein the leading portion is led from each of the both ends of the overlap portion in the length direction, and wherein the flexible wiring substrate further includes a coupling portion that couples the leading portions led from the both ends of the overlap portion with being spaced from the overlap portion, and a space is formed between the overlap portion and the coupling portion. ### Claim 5 (depends on 2) The liquid crystal display device equipped with a built-in touch panel according to claim 2, wherein the plurality of terminal portions is formed of the terminal portions of a plurality of groups each having two or more adjacent terminal portions, and wherein the first conductive pattern layer has a connection portion that electrically connects the two or more adjacent terminal portions configuring each of the groups to each other. ### Claim 6 (depends on 5) The liquid crystal display device equipped with a built-in touch panel according to claim 5, wherein the first conductive pattern layer includes a dummy terminal that does not establish electrical continuity with the connection portion between the terminal portions of the adjacent groups. ### Claim 7 (depends on 5) The liquid crystal display device equipped with a built-in touch panel according to claim 5, wherein the plurality of terminal portions is each shaped to extend in a width direction orthogonal to the length of the overlap portion, wherein the connection portion is shaped to extend in the length direction of the overlap portion, and wherein the adjacent two or more terminal portions configuring each of the groups, and the connection portion are shaped to intersect with each other with shared intersection portions. ### Claim 8 (depends on 7) The liquid crystal display device equipped with a built-in touch panel according to claim 7, wherein the connection portion is located in the center of the overlap portion in the width direction. ### Claim 9 (depends on 7) The liquid crystal display device equipped with a built-in touch panel according to claim 7, wherein a plurality of the connection portions electrically connected to the respective terminal portions of the plurality of groups is displaced from one side to the other side of the overlap portion in the width direction in an arrangement sequence of the terminal portions of the plurality of groups. ### Claim 10 (depends on 9) The liquid crystal display device equipped with a built-in touch panel according to claim 9, wherein all of the plurality of connection portions electrically connected to the respective terminal portions of the plurality of groups are displaced to any side from a center of the overlap portion in the width direction. ### Claim 11 (depends on 7) The liquid crystal display device equipped with a built-in touch panel according to claim 7, wherein two or more adjacent terminal portions configuring each of the groups have a land portion at an intersection point between one of the terminal portions and the connection portion, and are electrically connected to the second conductive pattern layer by one of the contact portions disposed on the land portion. ### Claim 12 (depends on 11) The liquid crystal display device equipped with a built-in touch panel according to claim 11, wherein the terminal portions of each of the groups include three or more of the terminal portions, and wherein the land portion is disposed on the terminal portion located at a position other than both ends of the three or more terminal portions in an arrangement direction. ### Claim 13 (depends on 11) The liquid crystal display device equipped with a built-in touch panel according to claim 11, wherein the terminal portions of each of the groups include three or more of the terminal portions, and wherein the land portion is disposed on the terminal portion located at any one of both ends of the three or more terminal portions in an arrangement direction. ### Claim 14 (depends on 5) The liquid crystal display device equipped with a built-in touch panel according to claim 5, wherein an outer diameter of the respective contact portions is larger than widths of the terminal portions and the connection portion. ### Claim 15 (depends on 2) The liquid crystal display device equipped with a built-in touch panel according to claim 2, wherein the overlap portion of the flexible wiring substrate includes a crimped portion joined to the second substrate by crimping, and an uncrimped portion overlapped with the second substrate with the avoidance of crimping, and wherein the plurality of contact portions are arranged in the uncrimped portion. ### Claim 16 (depends on 15) The liquid crystal display device equipped with a built-in touch panel according to claim 15, wherein the end of the second substrate joined to the flexible wiring substrate includes an outward portion of a leading end side in the longitudinal direction, and an inward portion on a center side of the second substrate from the leading end, and wherein the crimped portion is joined to the outward portion, and wherein the uncrimped portion is overlapped with the inward portion. ### Claim 17 (depends on 2) The liquid crystal display device equipped with a built-in touch panel according to claim 2, wherein the first conductive pattern layer includes a plurality of first wires separated from the plurality of terminal portions and arranged in the leading portion, wherein the second conductive pattern layer includes a plurality of second wires electrically connected to the plurality of contact portions, respectively, and wherein the plurality of second wires of the second conductive pattern layer passes through the overlap portion of the flexible wiring substrate, and is electrically connected to the plurality of first wires of the first conductive pattern layer on the leading portion. ### Claim 18 (depends on 17) The liquid crystal display device equipped with a built-in touch panel according to claim 17, wherein the plurality of second wires includes a wire that passes through a side end at which the leading portion is led from the plurality of contact portions, and a wire that passes through a side end opposite to the side at which the leading portion is led in the overlap portion. ### Claim 19 (depends on 17) The liquid crystal display device equipped with a built-in touch panel according to claim 17, wherein the plurality of second wires passes through a side end opposite to a side at which the leading portion is led with the avoidance of the side at which the leading portion is led from the plurality of contact portions in the overlap portion. ### Claim 20 (depends on 17) The liquid crystal display device equipped with a built-in touch panel according to claim 17, wherein the second conductive pattern layer has a planar pattern formed to avoid a contact with the plurality of second wires. ### Claim 21 (depends on 16) The liquid crystal display device equipped with a built-in touch panel according to claim 16, wherein the second conductive pattern layer has a planar pattern formed to avoid a contact with the plurality of second wires, and wherein the planar pattern is formed to overlap with the crimped portion with the avoidance of overlapping with the uncrimped portion. ### Claim 22 (depends on 5) The liquid crystal display device equipped with a built-in touch panel according to claim 5, wherein the wiring pattern of the second substrate has a plurality of terminals, and wherein the adjacent two or more terminal portions configuring each of the groups electrically connected by the connection portion are electrically connected to one of the terminals of the wiring pattern of the second substrate. ### Claim 23 (depends on 2) The liquid crystal display device equipped with a built-in touch panel according to claim 2, wherein the first substrate is arranged to have a projecting portion projected from the second substrate, and wherein the projecting portion of the first substrate is projected from the end of the second substrate which overlaps with the overlap portion of the flexible wiring substrate. ### Claim 24 (depends on 23) The liquid crystal display device equipped with a built-in touch panel according to claim 23, wherein the leading portion of the flexible wiring substrate is led to avoid an overlap with a part of the projecting portion of the first substrate. ### Claim 25 (depends on 24) The liquid crystal display device equipped with a built-in touch panel according to claim 24, further comprising: an integrated circuit chip mounted in an area of the projecting portion of the first substrate which does not overlap with the leading portion of the flexible wiring substrate; and a resin disposed to come in contact with an outer periphery of the integrated circuit chip.