# US 12,016,225 B2 · Display device including a fan-out unit and test line in the peripheral area > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,225 B2 - Document ID: US12016225B2 - Status: Granted - Kind: B2 - Application number: 18/091,623 - Filed: 2022-12-30 - Published: 2023-05-04 - Granted: 2024-06-18 - Earliest claimed: 2019-07-29 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Minchae Kwak; Hwayoung Song; Junyoung Jo; Jihyun Ka; Byungsun Kim; Ilgoo Youn; Jieun Lee; Seunghan Jo; Minhee Choi - Web page: https://patentgrep.com/patent/US12016225B2 ## CPC - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 59/1213: {the pixel elements being TFTs} - H10K 59/1216: {the pixel elements being capacitors} - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0819: used for counteracting undesired variations, e.g. feedback or autozeroing - G09G 2300/0842: forming a memory circuit, e.g. a dynamic memory with one capacitor - G09G 2300/0852: being a dynamic memory with more than one capacitor - G09G 2300/0861: with additional control of the display period without amending the charge stored in a pixel memory, e.g. by means of additional select electrodes - G09G 2310/0297: Special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a pre-processing circuitry delivering display data to said drivers or in the matrix panel, e.g. multiplexing plural data signals to one D/A converter or demultiplexing the D/A converter output to multiple columns - G09G 2320/02: Improving the quality of display appearance - G09G 2320/045: Compensation of drifts in the characteristics of light emitting or modulating elements - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - 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 ## Abstract A display device including: a substrate including a display area and a peripheral area adjacent to the display area; a plurality of data lines extending in a first direction in the display area; a fan-out unit arranged in the peripheral area and connected to the plurality of data lines; a first signal line arranged in the peripheral area; and a common power supply line arranged in the peripheral area and overlapping the fan-out unit. ## Claims ### Claim 1 A display device, comprising: a substrate including a display area and a peripheral area surrounding the display area, wherein the display area has a non-quadrangular shape and the peripheral area is divided into a first peripheral area and a second peripheral area with respect to a reference axis passing through a center of the display area; a plurality of data lines extending in a first direction in the display area; a fan-out unit arranged in the first peripheral area and comprising a plurality of wirings connected to the plurality of data lines, respectively; a test line arranged in the peripheral area; a demultiplexer arranged in the peripheral area; and a common power supply line arranged in the peripheral area, wherein each of a portion of the test line, a portion of the demultiplexer, and a portion of the common power supply line overlaps the fan-out unit in the first peripheral area. ### Claim 2 (depends on 1) The display device of claim 1, further comprising a data driving circuit providing data signals through a plurality of output lines, wherein the demultiplexer comprises a plurality of si h-demultiplexers electrically connected to a first output line among the plurality of output lines, and each of the plurality of sub-demultiplexers includes switches electrically connect to some data lines among the plurality of data lines. ### Claim 3 (depends on 2) The display device of claim 2, Wherein a first sub-demultiplexer among the plurality of sub-demultiplexers comprises: a first switch configured to electrically connect the first output line to a first data line in response to a first control signal; and a second switch configured to electrically connect the first output line to a second data line in response to a second control signal. ### Claim 4 (depends on 1) The display device of claim 1, further comprising: a test circuit disposed in the peripheral area and electrically connected to the plurality of data lines. ### Claim 5 (depends on 4) The display device of claim 4, wherein the test circuit is disposed in the second peripheral area to be opposite to the fan-out unit with respect to the reference axis. ### Claim 6 (depends on 1) The display device of claim 1, wherein the plurality of wirings of the fan-out unit comprises a first wiring and a second wiring which are adjacent to each Other, and the first wiring is disposed under an inter-insulating layer and the second wiring is disposed over the inter-insulating layer. ### Claim 7 (depends on 1) The display device of claim 1, wherein the test line is disposed between the display area and die common power supply line in a plan view. ### Claim 8 (depends on 1) The display device of claim 1, wherein the demultiplexer is disposed between the display area and the common power supply line in the first peripheral area. ### Claim 9 (depends on 1) The display device of claim 1, further comprising a first insulating layer, wherein the common power supply line is disposed over the first insulating layer and the plurality of wirings of the fan-out unit is disposed under the first insulating layer. ### Claim 10 (depends on 9) The display device of claim 9, wherein the test line is over the plurality of wirings of the fan-out unit. ### Claim 11 (depends on 10) The display device of claim 10, further comprising a second insulating layer, wherein the test line is over the second insulating layer. ### Claim 12 (depends on 11) The display device of claim 11, wherein a first edge of the common power supply line is covered by the second insulating layer.