# US 2024/0201549 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2024/0201549 A1 - Document ID: US20240201549A1 - Status: Published application - Kind: A1 - Application number: 18/540,945 - Filed: 2023-12-15 - Published: 2024-06-20 - Earliest claimed: 2022-12-19 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Masataka IKEDA; Kentaro KAWAI - Web page: https://patentgrep.com/patent/US20240201549A1 ## CPC - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G02F 1/13338: {Input devices, e.g. touch panels} - G02F 1/1334: based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals - G02F 1/1339: Gaskets; Spacers; Sealing of cells - G02F 1/13471: {in which all the liquid crystal cells or layers remain transparent, e.g. FLC, ECB, DAP, HAN, TN, STN, SBE-LC cells (G02F1/13475 takes precedence)} - 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 A display device includes a first conductive layer arranged above a first substrate and extending in a first direction, a first insulating film arranged above the first conductive layer, a second conductive layer and a third conductive layer arranged above the first insulating film and extending in a second direction intersecting the first direction, a second insulating film arranged above the second conductive layer and the third conductive layer, a fourth conductive layer arranged above the second insulating film and extending in the second direction, and a spacer arranged in a second substrate arranged to face the first substrate. ## Claims ### Claim 1 A display device comprising: a first conductive layer arranged above a first substrate and extending in a first direction; a first insulating film arranged above the first conductive layer; a second conductive layer and a third conductive layer arranged above the first insulating film and extending in a second direction intersecting the first direction; a second insulating film arranged above the second conductive layer and the third conductive layer; a fourth conductive layer arranged above the second insulating film and extending in the second direction; and a spacer arranged in a second substrate arranged to face the first substrate, wherein the second conductive layer and the third conductive layer are arranged separate from each other in the second direction, the fourth conductive layer is connected to each of the second conductive layer and the third conductive layer via a contact hole arranged in the second insulating film, the fourth conductive layer is arranged to intersect the first conductive layer, and the spacer is arranged to face a first region where the fourth conductive layer intersects the first conductive layer. ### Claim 2 (depends on 1) The display device according to claim 1, wherein a thickness of the fourth conductive layer is thinner than a thickness of the second conductive layer and third conductive layer. ### Claim 3 (depends on 1) The display device according to claim 1, further comprising: a third insulating film arranged above the fourth conductive layer; and a fifth conductive layer arranged above the third insulating layer, wherein the fifth conductive layer is arranged overlapping the first conductive layer to the third conductive layer and the fourth conductive layer, a first opening is arranged in a second region overlapping the first region in the fifth conductive layer, and the spacer is arranged inside the first opening. ### Claim 4 (depends on 3) The display device according to claim 3, further comprising: a first transparent conductive layer arranged in contact with the fifth conductive layer, wherein the first transparent conductive layer is arranged to overlap the first conductive layer to the third conductive layer and the fourth conductive layer. ### Claim 5 (depends on 1) The display device according to claim 1, further comprising: a sixth conductive layer and a seventh conductive layer arranged between the first substrate and the first insulating film and extending in the second direction, wherein the second conductive layer is connected to the sixth conductive layer via a contact hole arranged in the first insulating film, and the third conductive layer is connected to the seventh conductive layer via the contact hole arranged in the first insulating film. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the spacer does not overlap the second conductive layer and the third conductive layer. ### Claim 7 (depends on 3) The display device according to claim 3, further comprising: a light-shielding layer arranged on the second substrate; a second transparent conductive layer arranged in contact with the light-shielding layer; and a fourth insulating film arranged in contact with the second transparent conductive layer, wherein a second opening is arranged in a third region overlapping the first region in the fourth insulating film, and the spacer is arranged in contact with the second transparent conductive layer inside the second opening. ### Claim 8 (depends on 7) The display device according to claim 7, wherein an area of the second opening is larger than an area of the first opening. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the spacer does not overlap a transistor of a pixel adjacent to the first region. ### Claim 10 (depends on 1) The display device according to claim 1, further comprising: a liquid crystal layer arranged between the first substrate and the second substrate; and a light source arranged so that light enters toward a side surface of the first substrate or a side surface with the second substrate. ### Claim 11 (depends on 10) The display device according to claim 10, wherein the liquid crystal layer is a polymer-dispersed liquid crystal, an image is displayed in a display region when the polymer-dispersed liquid crystal is in a scattering state, and a background of the second substrate is visible from the first substrate and a background of the first substrate is visible from the second substrate in the display region when the polymer-dispersed liquid crystal is in a non-scattering state.