# US 12,016,208 B2 · Display device and method of manufacturing display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,208 B2 - Document ID: US12016208B2 - Status: Granted - Kind: B2 - Application number: 17/278,549 - Filed: 2018-09-28 - Published: 2021-11-11 - Granted: 2024-06-18 - Earliest claimed: 2018-09-28 - Assignees: Sharp Kabushiki Kaisha - Applicants: Sharp Kabushiki Kaisha - Inventors: Eiji Koike; Tohru Sonoda; Masahiro Inuzuka - Web page: https://patentgrep.com/patent/US12016208B2 ## CPC - H10K 59/122: Pixel-defining structures or layers, e.g. banks - G09F 9/00: Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements (in which the variable information is permanently attached to a movable support G09F11/00; abacus G06C1/00; slide-rules G06G1/00) - G09F 9/30: in which the desired character or characters are formed by combining individual elements (panels comprising a number of electrodes in a single cell controlling light arriving from an independent light source, e.g. electro-optical or magneto-optical cell, G02F1/00) - H05B 33/04: Sealing arrangements {, e.g. against humidity} - H05B 33/10: Apparatus or processes specially adapted to the manufacture of electroluminescent light sources - H05B 33/12: Light sources with substantially two-dimensional [2D] radiating surfaces - H05B 33/22: characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers - H05B 33/26: characterised by the composition or arrangement of the conductive material used as an electrode - H10K 59/871: {Self-supporting sealing arrangements} - H10K 59/352: {the areas of the RGB subpixels being different} - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - G09F: DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL ## Abstract A display device includes a display area, a frame area around the display area, and a contact area between the display area and the frame area. In the display area is there provided a light-emitting element layer including an anode, a functional layer, a cathode, and a pixel bank covering an edge of the anode. The cathode is electrically connected to a metal film in the contact area. An insular TEG pattern is provided in the contact area. ## Claims ### Claim 1 A display device comprising a display area and a frame area around the display area, the display area including a stack body including: a thin-film transistor (TFT) layer; a light-emitting element layer including an anode, a functional layer, a cathode, and a pixel bank covering an edge of the anode; and a sealing layer; the sealing layer including at least one organic film, and a partition wall provided in the frame area, the partition wall being configured to delineate an edge of the at least one organic film; the display device further comprising, between the display area and the partition wall, a contact area in which the cathode is electrically connected to a metal film made of a same material and in a same layer as the anode; and an insular test element group (TEG) pattern provided in the contact area, the insular TEG pattern being made of a same material as the functional layer, wherein the metal film has a first opening at least partially overlapped by the insular TEG pattern when viewed from above with respect to a stacking direction for the stack body. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the insular TEG pattern entirely overlaps the first opening when viewed from the above with respect to the stacking direction for the stack body. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the first opening is cross-shaped. ### Claim 4 (depends on 2) The display device according to claim 2, wherein the first opening is substantially identical in shape to a second opening in the pixel bank. ### Claim 5 (depends on 1) The display device according to claim 1, wherein the first opening is entirely overlapped by the insular TEG pattern when viewed from the above with respect to the stacking direction for the stack body. ### Claim 6 (depends on 5) The display device according to claim 5, wherein the first opening is cross-shaped. ### Claim 7 (depends on 5) The display device according to claim 5, wherein the first opening is substantially identical in shape to a second opening in the pixel bank. ### Claim 8 (depends on 1) The display device according to claim 1, wherein: the contact area includes, on the metal film, a first out-of-pixel partition wall overlapping the cathode and a second out-of-pixel partition wall not overlapping the cathode, and the insular TEG pattern resides between the first out-of-pixel partition wall and the second out-of-pixel partition wall. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the functional layer includes a light-emitting layer. ### Claim 10 A display device comprising a display area and a frame area around the display area, the display area including a stack body including: a thin-film transistor (TFT) layer; a light-emitting element layer including an anode, a functional layer, a cathode, and a pixel bank covering an edge of the anode; and a sealing layer; the sealing layer including at least one organic film, and a partition wall provided in the frame area, the partition wall being configured to delineate an edge of the at least one organic film; the display device further comprising, between the display area and the partition wall, a contact area in which the cathode is electrically connected to a metal film made of a same material and in a same layer as the anode; an insular test element group (TEG) pattern provided in the contact area, the insular TEG pattern being made of a same material as the functional layer; and an out-of-pixel bank provided on the metal film, the out-of-pixel bank having a first opening, wherein the insular TEG pattern at least partially overlaps the first opening when viewed from above with respect to a stacking direction for the stack body. ### Claim 11 (depends on 10) The display device according to claim 10, wherein the insular TEG pattern entirely overlaps the first opening when viewed from the above with respect to the stacking direction for the stack body. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the first opening is cross-shaped. ### Claim 13 (depends on 11) The display device according to claim 11, wherein the first opening is substantially identical in shape to a second opening in the pixel bank. ### Claim 14 (depends on 10) The display device according to claim 10, wherein the first opening is entirely overlapped by the insular TEG pattern when viewed from the above with respect to the stacking direction for the stack body. ### Claim 15 (depends on 14) The display device according to claim 14, wherein the first opening is cross-shaped. ### Claim 16 (depends on 14) The display device according to claim 14, wherein the first opening is substantially identical in shape to a second opening in the pixel bank. ### Claim 17 (depends on 10) The display device according to claim 10, wherein: the contact area includes at least one out-of-pixel partition wall on the metal film, and the out-of-pixel bank has a lower height above the metal film than do the at least one out-of-pixel partition wall above the metal film. ### Claim 18 (depends on 17) The display device according to claim 17, wherein: the at least one out-of-pixel partition wall includes a first out-of-pixel partition wall overlapping the cathode and a second out-of-pixel partition wall not overlapping the cathode, and the insular TEG pattern resides between the first out-of-pixel partition wall and the second out-of-pixel partition wall. ### Claim 19 (depends on 17) The display device according to claim 17, wherein the out-of-pixel bank is made of a same material and in a same layer as the at least one out-of-pixel partition wall. ### Claim 20 (depends on 10) The display device according to claim 10, wherein the pixel bank is made of a same material and in a same layer as the out-of-pixel bank.