# US 12,008,932 B2 · Display device and mother substrate for display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,008,932 B2 - Document ID: US12008932B2 - Status: Granted - Kind: B2 - Application number: 18/079,107 - Filed: 2022-12-12 - Published: 2023-10-05 - Granted: 2024-06-11 - Earliest claimed: 2022-03-29 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., LTD. - Inventors: Do Yeong Park; Chong Chul Chai - Web page: https://patentgrep.com/patent/US12008932B2 ## CPC - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - G09G 3/32: semiconductive, e.g. using light-emitting diodes [LED] - G09G 2300/0426: Layout of electrodes and connections - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - H10P 74/273: {Interconnections for measuring or testing, e.g. probe pads} - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - H10P: GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10 ## Abstract A display device comprises a display area and a first non-display area located on a side of the display area in a first direction, a first bus pattern disposed in the first non-display area, a second bus pattern disposed in the first non-display area and spaced apart from the first bus pattern in a second direction intersecting the first direction, first voltage lines disposed in the display area, extending in the first direction, and electrically connected to the first bus pattern, second voltage lines disposed in the display area, extending in the first direction, and electrically connected to the second bus pattern, and a first test pad disposed in the first non-display area and disposed between the first bus pattern and the second bus pattern. ## Claims ### Claim 1 A display device comprising: a display area and a first non-display area located on a side of the display area in a first direction; a first bus pattern disposed in the first non-display area; a second bus pattern disposed in the first non-display area and spaced apart from the first bus pattern in a second direction intersecting the first direction; first voltage lines disposed in the display area, extending in the first direction, and electrically connected to the first bus pattern; second voltage lines disposed in the display area, extending in the first direction, and electrically connected to the second bus pattern; and a first test pad disposed in the first non-display area and disposed between the first bus pattern and the second bus pattern. ### Claim 2 (depends on 1) The display device of claim 1, wherein the second bus pattern does not overlap the first voltage lines in the first direction, and the first bus pattern does not overlap the second voltage lines in the first direction. ### Claim 3 (depends on 1) The display device of claim 1, wherein the first test pad comprises: a first sub-test pad electrically connected to the first bus pattern; and a second sub-test pad electrically connected to the second bus pattern, and the first sub-test pad and the second sub-test pad are spaced apart from each other. ### Claim 4 (depends on 3) The display device of claim 3, further comprising: a third bus pattern disposed in the first non-display area and spaced apart from the first bus pattern and the second bus pattern; a fourth bus pattern disposed in a second non-display area spaced apart from the first non-display area in the first direction with the display area disposed between the fourth bus pattern and the first non-display area; and a second test pad disposed adjacent to the third bus pattern in the first non-display area, wherein the third bus pattern and the fourth bus pattern are electrically connected to the first voltage lines. ### Claim 5 (depends on 4) The display device of claim 4, wherein the second test pad comprises: a third sub-test pad electrically connected to the third bus pattern; and a fourth sub-test pad electrically connected to the fourth bus pattern, and the third sub-test pad and the fourth sub-test pad are spaced apart from each other. ### Claim 6 (depends on 4) The display device of claim 4, further comprising: an alignment dummy pattern disposed in the second non-display area and electrically connected to the fourth bus pattern. ### Claim 7 (depends on 4) The display device of claim 4, wherein the third bus pattern and the fourth bus pattern overlap each other in the first direction. ### Claim 8 (depends on 1) The display device of claim 1, further comprising: a first electrode and a second electrode disposed in the display area, extending in the first direction, and spaced apart from each other in the second direction, wherein the second electrode is electrically connected to one of the second voltage lines through an electrode contact hole. ### Claim 9 (depends on 8) The display device of claim 8, further comprising: a first dummy pattern spaced apart from the first electrode in the first direction, wherein the first dummy pattern is electrically connected to one of the first voltage lines through an alignment contact hole. ### Claim 10 (depends on 8) The display device of claim 8, further comprising: a light emitting element disposed between the first electrode and the second electrode. ### Claim 11 A display device comprising: a display area, a first non-display area located on a side of the display area in a first direction, and a second non-display area located on another side of the display area in the first direction; a first bus pattern and a second bus pattern disposed in the first non-display area and spaced apart from each other; a third bus pattern and a fourth bus pattern disposed in the second non-display area and spaced apart from each other; a first voltage line disposed in the display area and electrically connected to the first bus pattern and the third bus pattern; a second voltage line disposed in the display area and electrically connected to the second bus pattern and the fourth bus pattern; a first test pad disposed between the first bus pattern and the second bus pattern in the first non-display area; and a first alignment dummy pattern electrically connected to the third bus pattern and a second alignment dummy pattern electrically connected to the fourth bus pattern in the second non-display area. ### Claim 12 (depends on 11) The display device of claim 11, wherein the first bus pattern and the third bus pattern overlap each other in the first direction, and the second bus pattern and the fourth bus pattern overlap each other in the first direction. ### Claim 13 (depends on 11) The display device of claim 11, further comprising: a first electrode and a second electrode spaced apart from each other on the first voltage line and the second voltage line in the display area; and a light emitting element disposed between the first electrode and the second electrode, wherein the second electrode is electrically connected to the second voltage line through an electrode contact hole. ### Claim 14 (depends on 11) The display device of claim 11, wherein the first alignment dummy pattern and the second alignment dummy pattern are aligned with a side of the display device adjacent to the second non-display area. ### Claim 15 (depends on 11) The display device of claim 11, further comprising: a second test pad disposed between the third bus pattern and the fourth bus pattern in the second non-display area. ### Claim 16 (depends on 11) The display device of claim 11, further comprising: a fifth bus pattern disposed in the first non-display area, spaced apart from the first bus pattern and the second bus pattern, and electrically connected to the first voltage line; and a second test pad disposed adjacent to the fifth bus pattern in the first non-display area. ### Claim 17 (depends on 16) The display device of claim 16, further comprising: a sixth bus pattern disposed in the second non-display area, spaced apart from the third bus pattern and the fourth bus pattern, and electrically connected to the first voltage line, wherein the second test pad comprises: a first sub-test pad electrically connected to the fifth bus pattern; and a second sub-test pad electrically connected to the sixth bus pattern, and the first sub-test pad and the second sub-test pad are spaced apart from each other. ### Claim 18 (depends on 11) The display device of claim 11, wherein the first test pad comprises: a first sub-test pad electrically connected to the first bus pattern; and a second sub-test pad electrically connected to the second bus pattern, and the first sub-test pad and the second sub-test pad are spaced apart from each other. ### Claim 19 A mother substrate for a display device, the mother substrate comprising: a cell area that is defined by a cutting line and comprises a display area, a first non-display area located on a side of the display area in a first direction and a second non-display area located on another side of the display area in the first direction, and a cell peripheral area; a first bus pattern and a second bus pattern disposed in the first non-display area and spaced apart from each other; a third bus pattern and a fourth bus pattern disposed in the second non-display area and spaced apart from each other; a first voltage line disposed in the display area and electrically connected to the first bus pattern and the third bus pattern; a second voltage line disposed in the display area and electrically connected to the second bus pattern and the fourth bus pattern; a first test pad disposed between the first bus pattern and the second bus pattern in the first non-display area; and a first alignment pad and a second alignment pad disposed in the cell peripheral area adjacent to the second non-display area. ### Claim 20 (depends on 19) The mother substrate of claim 19, further comprising: a first alignment line electrically connected to the first voltage line; and a second alignment line electrically connected to the second voltage line.