# US 12,223,922 B2 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,223,922 B2 - Document ID: US12223922B2 - Status: Granted - Kind: B2 - Application number: 18/217,841 - Filed: 2023-07-03 - Published: 2024-01-11 - Granted: 2025-02-11 - Earliest claimed: 2022-07-05 - Assignees: Japan Display Inc. - Applicants: Japan Display Inc. - Inventors: Hitoshi Tanaka - Web page: https://patentgrep.com/patent/US12223922B2 ## CPC - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/001: {using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background (slide projectors per se G03B23/00 = 42 HP)} - G09G 2300/0426: Layout of electrodes and connections - G09G 2310/0232: Special driving of display border areas - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - 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) ## Abstract A display device includes a substrate, a plurality of pixels provided in a display region of the substrate, a plurality of signal lines arrayed alongside each other in a first direction and extending in a second direction intersecting the first direction, a plurality of scanning lines extending in a direction intersecting the signal lines, and a scanning line drive circuit disposed in a peripheral region between an end part of the substrate and the display region and including a plurality of switching elements coupled to the scanning lines. The scanning lines include at least two or more scanning lines having different lengths, and the switching elements have longer channel widths as the scanning lines electrically coupled to the switching elements have longer lengths. ## Claims ### Claim 1 A display device comprising: a substrate; a plurality of pixels provided in a display region of the substrate; a plurality of signal lines arrayed alongside each other in a first direction and extending in a second direction intersecting the first direction; a plurality of scanning lines extending in a direction intersecting the signal lines; and a scanning line drive circuit disposed in a peripheral region between an end part of the substrate and the display region and including a plurality of switching elements coupled to the scanning lines, wherein the scanning lines include at least two or more scanning lines having different lengths, the switching elements have longer channel widths as the scanning lines electrically coupled to the switching elements have longer lengths, an outer periphery of the display region includes a first side extending in the second direction, and a first tilted side coupled to one end side of the first side and tilted in the second direction, the lengths of the scanning lines provided in a region corresponding to the first tilted side are shorter than the lengths of the scanning lines provided in a region corresponding to the first side, and the channel widths of the switching elements arrayed along the first tilted side are shorter than the channel widths of the switching elements arrayed along the first side. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the lengths of the scanning lines provided in the region corresponding to the first tilted side decrease as separation from the first side in a direction along the first tilted side increases, and the channel widths of the switching elements arrayed along the first tilted side decrease as separation from the first side increases. ### Claim 3 (depends on 1) The display device according to claim 1, wherein the outer periphery of the display region includes a second tilted side coupled to the other end side of the first side and tilted in the second direction, and the channel widths of the switching elements arrayed along the second tilted side are shorter than the channel widths of the switching elements arrayed along the first side. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the channel widths of the switching elements arrayed along the second tilted side are equal to the channel widths of the switching elements arrayed along the first tilted side. ### Claim 5 (depends on 3) The display device according to claim 3, wherein the distance between the second tilted side and the switching elements arrayed along the second tilted side is longer than the distance between the first tilted side and the switching elements arrayed along the first tilted side, and the channel widths of the switching elements arrayed along the second tilted side are longer than the channel widths of the switching elements arrayed along the first tilted side. ### Claim 6 (depends on 5) The display device according to claim 5, further comprising: a signal line coupling circuit disposed in the peripheral region and electrically coupled to the signal lines; a driver IC disposed in the peripheral region and configured to control the scanning line drive circuit and the signal line coupling circuit; and a plurality of coupling wires coupling the signal lines provided in the display region to the signal line coupling circuit, wherein the coupling wires extend in a direction along the second tilted side between the second tilted side and the switching elements arrayed along the second tilted side. ### Claim 7 (depends on 1) The display device according to claim 1, wherein the switching elements arrayed along the first side have a channel width direction orthogonal to the first side, and the switching elements arrayed along the first tilted side have a channel width direction orthogonal to the first tilted side. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the switching elements include a first switching element, a second switching element, and a third switching element that are electrically coupled to one of the scanning lines, the first switching element, the second switching element, and the third switching element each include a semiconductor layer, a source electrode, a drain electrode, and a gate electrode, the source electrode, the drain electrode, and the gate electrode extend in a direction intersecting a side of the outer periphery of the display region, and the gate electrode is provided over the semiconductor layer and disposed between the source electrode and the drain electrode in a direction along the side of the outer periphery of the display region.