# US 2019/0317375 A1 · Liquid crystal display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0317375 A1 - Document ID: US20190317375A1 - Status: Published application - Kind: A1 - Application number: 16/302,625 - Filed: 2017-05-10 - Published: 2019-10-17 - Earliest claimed: 2016-05-17 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: JUNICHI MORINAGA; MITSUNORI HARADA; MASAHIRO YOSHIDA; TOMOO FURUKAWA - Web page: https://patentgrep.com/patent/US20190317375A1 ## CPC - G02F 1/136259: {Repairing; Defects} - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G02F 1/133345: {Insulating layers (G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence)} - G02F 1/133711: {by organic films, e.g. polymeric films} - G02F 1/1343: Electrodes {(reflective electrodes G02F1/133553)} - G02F 1/134372: {for fringe field switching [FFS] where the common electrode is not patterned} - G02F 1/136272: {Auxiliary lines} - G02F 2201/121: common or background - G02F 2201/123: pixel - 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 ## Abstract The present invention provides a liquid crystal display device for which laser repair can be easily performed to correct a defect pixel, and/or a liquid crystal display device capable of reducing generation of contact failure and a short circuit. The liquid crystal display device of the present invention includes a first substrate, a liquid crystal layer, and a second substrate in the given order. The first substrate includes: an insulating substrate; a scanning line; a data line; a first insulating film disposed between the scanning line and the data line; a common line extending in an extension direction of the scanning line or the data line; a counter electrode facing the common line with the first insulating film in between; a switching element being connected to the scanning line and the data line; a second insulating film; a pixel electrode being connected to the switching element and the counter electrode; a third insulating film; and a common electrode being provided with an opening. The switching element, the second insulating film, the pixel electrode, the third insulating film, and the common electrode are disposed in the given order toward the liquid crystal layer. ## Claims ### Claim 1 A liquid crystal display device comprising a first substrate, a liquid crystal layer, and a second substrate in the given order, the first substrate comprising: an insulating substrate; a scanning line; a data line; a first insulating film disposed between the scanning line and the data line; a common line extending in an extension direction of the scanning line or the data line; a counter electrode facing the common line with the first insulating film in between; a switching element being connected to the scanning line and the data line; a second insulating film; a pixel electrode being connected to the switching element and the counter electrode; a third insulating film; and a common electrode being provided with an opening, the switching element, the second insulating film, the pixel electrode, the third insulating film, and the common electrode being disposed in the given order toward the liquid crystal layer. ### Claim 2 (depends on 1) The liquid crystal display device according to claim 1, wherein the switching element is a thin-film transistor, and the pixel electrode is connected to a drain electrode of the thin-film transistor through a contact hole formed right above the drain electrode, not right above the counter electrode. ### Claim 3 (depends on 1) The liquid crystal display device according to claim 1, wherein the switching element is a thin-film transistor, the pixel electrode is connected to a drain electrode of the thin-film transistor through a contact hole formed in the second insulating film, right above the drain electrode, and the contact hole formed in the second insulating film is positioned closer to the thin-film transistor than the counter electrode is. ### Claim 4 (depends on 2) The liquid crystal display device according to claim 2, wherein the contact hole extends outside an outline of the drain electrode. ### Claim 5 (depends on 4) The liquid crystal display device according to claim 4, wherein the second insulating film includes an inorganic film and an organic film stacked on the inorganic film. ### Claim 6 (depends on 4) The liquid crystal display device according to claim 4, wherein the drain electrode includes a lower layer containing a metal other than aluminum, and an upper layer being stacked on the lower layer and containing aluminum, and the pixel electrode is in contact with the lower layer of the drain electrode. ### Claim 7 (depends on 6) The liquid crystal display device according to claim 6, wherein in the contact hole, the upper layer of the drain electrode is indented inside the second insulating film from an edge of the second insulating film. ### Claim 8 (depends on 4) The liquid crystal display device according to claim 4, wherein the first substrate further comprises a semiconductor layer stacked on the first insulating film in a region corresponding to the contact hole. ### Claim 9 (depends on 1) The liquid crystal display device according to claim 1, wherein the common electrode extends over the counter electrode. ### Claim 10 (depends on 1) The liquid crystal display device according to claim 1, wherein the switching element is a thin-film transistor, the counter electrode is disposed in the same layer as the drain electrode of the thin-film transistor, and the counter electrode is connected to the drain electrode via a drain lead line disposed in the same layer as the counter electrode and the drain electrode. ### Claim 11 (depends on 1) The liquid crystal display device according to claim 1, wherein the pixel electrode is connected to the counter electrode through a second contact hole formed in the second insulating film, right above the counter electrode. ### Claim 12 (depends on 11) The liquid crystal display device according to claim 11, wherein the counter electrode includes an outside portion that extends outside an outline of the common line in the direction perpendicular to the common line, the outside portion includes a first region with the second contact hole existing in the direction perpendicular to the common line and a second region with no second contact hole existing in the direction perpendicular to the common line, and a width of the first region in the direction perpendicular to the common line is smaller than a width of the second region in the direction perpendicular to the common line. ### Claim 13 (depends on 11) The liquid crystal display device according to claim 11, wherein the switching element is a thin-film transistor, and the counter electrode is formed in the same layer as the drain electrode of the thin-film transistor and is disposed separately from the drain electrode. ### Claim 14 (depends on 1) The liquid crystal display device according to claim 1, wherein the common line is connected to the common electrode through a contact hole formed at least in the second insulating film and in the third insulating film. ### Claim 15 (depends on 14) The liquid crystal display device according to claim 14, wherein the contact hole formed at least in the second insulating film and in the third insulating film is formed in not all pixels. ### Claim 16 (depends on 1) The liquid crystal display device according to claim 1, wherein the switching element is a thin-film transistor, the pixel electrode is electrically connected to the thin-film transistor through a contact hole formed in the second insulating film, and the common electrode is not disposed at the position corresponding to the contact hole formed in the second insulating film.