# US 12,016,222 B2 · Display device having dummy pattern in bending area extending to pad area > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,222 B2 - Document ID: US12016222B2 - Status: Granted - Kind: B2 - Application number: 17/313,925 - Filed: 2021-05-06 - Published: 2022-01-27 - Granted: 2024-06-18 - Earliest claimed: 2020-07-23 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Chungi You - Web page: https://patentgrep.com/patent/US12016222B2 ## CPC - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/122: Pixel-defining structures or layers, e.g. banks - H10K 59/124: Insulating layers formed between TFT elements and OLED elements - H10K 59/88: Dummy elements, i.e. elements having non-functional features - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A display device including a substrate including a display area, a pad area, and a bending area, the pad area being outside the display area, and the bending area being between the display area and the pad area, a connection line extending in a direction from the display area to the pad area, and arranged in the bending area, a first organic insulating layer and a second organic insulating layer, which are sequentially arranged to cover the connection line, and a dummy pattern between the first organic insulating layer and the second organic insulating layer, wherein the dummy pattern includes a first extension portion and a second extension portion that each extend from the bending area to the pad area. ## Claims ### Claim 1 A display device comprising: a substrate comprising a display area, a pad area, and a bending area, the pad area being located outside the display area, and the bending area being located between the display area and the pad area; a connection line extending in a direction from the display area to the pad area, and arranged in the bending area; a first organic insulating layer and a second organic insulating layer, which are sequentially arranged to cover the connection line; and a dummy pattern located between the first organic insulating layer and the second organic insulating layer, wherein: the dummy pattern comprises a first extension portion and a second extension portion spaced apart from each other in a plan view in the pad area; the first extension portion and the second extension portion each extend from the bending area to the pad area; and the dummy pattern comprises electrically conductive material. ### Claim 2 (depends on 1) The display device of claim 1, wherein: the connection line comprises a first connection line and a second connection line; and the dummy pattern overlaps each of the first connection line and the second connection line. ### Claim 3 (depends on 1) The display device of claim 1, wherein: the second organic insulating layer comprises an insulating layer opening portion overlapping the pad area; and at least one of the first extension portion and the second extension portion is exposed by the insulating layer opening portion. ### Claim 4 (depends on 1) The display device of claim 1, wherein the connection line and the dummy pattern are electrically insulated from each other. ### Claim 5 (depends on 1) The display device of claim 1, further comprising a display element arranged above the display area, the display element comprising a pixel electrode and an opposite electrode, wherein the dummy pattern comprises a same material as a material of the pixel electrode. ### Claim 6 (depends on 5) The display device of claim 5, further comprising: a thin-film transistor located above the substrate, the thin-film transistor being connected to the display element; a first planarization layer and a second planarization layer arranged between the thin-film transistor and the pixel electrode; and a pixel defining layer covering an edge of the pixel electrode, the pixel defining layer comprising an opening that exposes a central portion of the pixel electrode, wherein: the first organic insulating layer comprises a same material as a material of the second planarization layer; and the second organic insulating layer comprises a same material as a material of the pixel defining layer. ### Claim 7 (depends on 1) The display device of claim 1, further comprising an inorganic insulating layer disposed above the substrate, wherein the inorganic insulating layer comprises a lower opening portion that overlaps the bending area. ### Claim 8 (depends on 7) The display device of claim 7, further comprising a lower organic insulating layer disposed below the first organic insulating layer, wherein the lower organic insulating layer overlaps the lower opening portion. ### Claim 9 (depends on 1) The display device of claim 1, wherein the dummy pattern is spaced apart from the display area. ### Claim 10 A display device comprising: a substrate comprising a display area, a pad area, and a bending area, the pad area being located outside the display area, and the bending area being located between the display area and the pad area; a connection line extending in a direction from the display area to the pad area, and arranged in the bending area; a first organic insulating layer and a second organic insulating layer, which are sequentially arranged to cover the connection line; and a plurality of dummy patterns arranged between the first organic insulating layer and the second organic insulating layer, the plurality of dummy patterns being located in the bending area. ### Claim 11 (depends on 10) The display device of claim 10, wherein: the plurality of dummy patterns comprise a first dummy pattern and a second dummy pattern; and the first dummy pattern and the second dummy pattern are spaced apart from each other in the bending area. ### Claim 12 (depends on 11) The display device of claim 11, wherein: the connection line comprises a first connection line and a second connection line, the first connection line and the second connection line being adjacent to each other; and the first connection line and the second connection line each overlap the first dummy pattern. ### Claim 13 (depends on 11) The display device of claim 11, wherein: the connection line comprises a first connection line and a second connection line, the first connection line and the second connection line being adjacent to each other; the first connection line overlaps the first dummy pattern; and the second connection line overlaps the second dummy pattern. ### Claim 14 (depends on 11) The display device of claim 11, wherein the first dummy pattern comprises a first extension portion and a second extension portion, the first extension portion and the second extension portion each extending from the bending area to the pad area. ### Claim 15 (depends on 14) The display device of claim 14, wherein: the second organic insulating layer comprises an insulating layer opening portion that overlaps the pad area; and at least one of the first extension portion and the second extension portion is exposed by the insulating layer opening portion. ### Claim 16 (depends on 10) The display device of claim 10, wherein the connection line and the plurality of dummy patterns are electrically insulated from each other. ### Claim 17 (depends on 10) The display device of claim 10, further comprising a display element located above the display area, the display element comprising a pixel electrode and an opposite electrode, wherein the plurality of dummy patterns comprise a same material as a material of the pixel electrode. ### Claim 18 (depends on 17) The display device of claim 17, further comprising: a thin-film transistor arranged above the substrate, the thin-film transistor being connected to the display element; a first planarization layer and a second planarization layer disposed between the thin-film transistor and the pixel electrode; and a pixel defining layer covering an edge of the pixel electrode, the pixel defining layer comprising an opening that exposes a central portion of the pixel electrode, wherein: the first organic insulating layer comprises a same material as a material of the second planarization layer; and the second organic insulating layer comprises a same material as a material of the pixel defining layer. ### Claim 19 (depends on 10) The display device of claim 10, further comprising an inorganic insulating layer above the substrate, wherein the inorganic insulating layer comprises a lower opening portion that overlaps the bending area.