# US 2021/0278734 A1 · Display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0278734 A1 - Document ID: US20210278734A1 - Status: Published application - Kind: A1 - Application number: 17/118,522 - Filed: 2020-12-10 - Published: 2021-09-09 - Earliest claimed: 2020-03-03 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Do Yeong PARK - Web page: https://patentgrep.com/patent/US20210278734A1 ## CPC - G02F 1/134345: {Subdivided pixels, e.g. for grey scale or redundancy} - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G02F 1/136222: {Colour filters incorporated in the active matrix substrate} - G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer} - G02F 1/13624: {having more than one switching element per pixel} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - H10D 30/674: {characterised by the active materials} - H10D 30/6757: {characterised by the structure of the channel, e.g. transverse or longitudinal shape or doping profile (TFTs having channel structures for preventing kink or snapback effects H10D30/6708; TFTs having lightly-doped source or drain extensions H10D30/6715)} - H10D 86/443: {adapted for preventing breakage, peeling or short circuiting} - H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics} - H10D 86/481: {integrated with passive devices, e.g. auxiliary capacitors} - H10D 86/60: wherein the TFTs are in active matrices - G02F 2201/40: Arrangements for improving the aperture ratio - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A display device includes a gate line extended in a first direction and a data line extended in a second direction crossing the first direction; a first switching element including a first source electrode connected to the data line, a first drain electrode, and a first gate electrode connected to the gate line; and a second switching element including a second source electrode connected to the data line, a second drain electrode, and a second gate electrode connected to the gate line. A region of the first drain electrode overlapping the first gate electrode extends in the second direction, the second source electrode is extended in the second direction, and is parallel with the first and second drain electrodes. A region of the second drain electrode overlapping the second gate electrode includes a first region extended in the first direction and a second region extended in the second direction. ## Claims ### Claim 1 A display device comprising: a gate line extended in a first direction and a data line extended in a second direction crossing the first direction on a substrate; a first switching element comprising a first source electrode connected from the data line, a first drain electrode spaced apart from the first source electrode, and a first gate electrode connected to the gate line; and a second switching element comprising a second source electrode connected to the data line, a second drain electrode spaced apart from the second source electrode, and a second gate electrode connected to the gate line, wherein a region of the first drain electrode overlapping the first gate electrode is extended in the second direction, wherein the second source electrode is extended in the second direction, and is disposed in parallel with the first drain electrode and the second drain electrode, and wherein a region of the second drain electrode overlapping the second gate electrode includes a first region extended in the first direction and a second region extended in the second direction. ### Claim 2 (depends on 1) The display device of claim 1, wherein the second region of the second drain electrode and the second source electrode face each other and arranged in parallel. ### Claim 3 (depends on 2) The display device of claim 2, wherein the second region of the second drain electrode entirely overlaps the gate line, and a portion of the first region of the second drain electrode does not overlap the gate line. ### Claim 4 (depends on 3) The display device of claim 3, wherein the first switching element comprises a first semiconductor region in which a first channel region is formed between the first source electrode and the first drain electrode, and the second switching element comprises a second semiconductor region in which a second channel region is formed between the second source electrode and the second region of the second drain electrode. ### Claim 5 (depends on 4) The display device of claim 4, wherein a longitudinal direction of each of the first channel region and the second channel region is parallel to the first direction. ### Claim 6 (depends on 5) The display device of claim 5, wherein a length of the first channel region is a shortest distance between the first source electrode and the first drain electrode, and wherein a length of the second channel region is a shortest distance between the second source electrode and the second drain electrode. ### Claim 7 (depends on 6) The display device of claim 6, wherein the first source electrode and the second source electrode are disposed directly on a same layer and formed of a same material. ### Claim 8 (depends on 7) The display device of claim 7, further comprising: a storage line disposed in parallel with the gate line; and a third switching element comprising a third source electrode connected from the storage line, a third drain electrode spaced apart from the third source electrode, and a third gate electrode connected to the gate line. ### Claim 9 (depends on 8) The display device of claim 8, wherein the third drain electrode is connected to the second drain electrode, and wherein the third source electrode and the second region of the second drain electrode face each other and arranged in parallel. ### Claim 10 (depends on 9) The display device of claim 9, wherein the third switching element comprises a third semiconductor region in which a third channel region is formed between the third source electrode and the second region of the second drain electrode. ### Claim 11 (depends on 10) The display device of claim 10, wherein a longitudinal direction of each of the first channel region, the second channel region and the third channel region is parallel to the first direction. ### Claim 12 (depends on 8) The display device of claim 8, further comprising: the storage line disposed in parallel with the gate line; a color filter disposed on the first to third source electrodes and the first to third drain electrodes; and an insulating layer disposed on the color filter, wherein the color filter includes a first via hole exposing the first drain electrode and a second via hole exposing the third source electrode and the second drain electrode, and wherein the insulating layer includes a first contact hole exposing the first drain electrode, a second contact hole exposing the third source electrode, and a third contact hole exposing the second drain electrode. ### Claim 13 (depends on 12) The display device of claim 12, wherein the first contact hole overlaps the first via hole, and the second contact hole and the third contact hole overlap the second via hole. ### Claim 14 (depends on 13) The display device of claim 13, wherein the first drain electrode is connected to an adjacent first sub-pixel electrode through the first contact hole, the third source electrode is connected to the storage line through the second contact hole, and the second drain electrode is connected to an adjacent second sub-pixel electrode through the third contact hole. ### Claim 15 (depends on 13) The display device of claim 13, further comprising: a first conductive pattern extended from the third source electrode and overlapping the second contact hole and the second via hole; and a second conductive pattern extended from the second drain electrode and overlapping the third contact hole and the second via hole, wherein the first conductive pattern and the second conductive pattern are spaced apart from each other, with the gate line therebetween, and do not overlap the gate line. ### Claim 16 A display device comprising: a gate line extended in a first direction, a storage line parallel to the gate line, and a data line extended in a second direction crossing the first direction on a substrate; a first switching element comprising a first source electrode connected from the data line, a first drain electrode spaced apart from the first source electrode, and a first gate electrode connected to the gate line; a second switching element comprising a second source electrode connected to the data line, a second drain electrode spaced apart from the second source electrode, and a second gate electrode connected to the gate line; and a third switching element comprising a third source electrode connected to the storage line, a third drain electrode spaced apart from the third source electrode, and a third gate electrode connected to the gate line, wherein a region of the first drain electrode overlapping the first gate electrode is extended in the second direction, wherein the second source electrode is extended in the second direction, and is disposed in parallel with the first drain electrode and the second drain electrode, wherein a region of the second drain electrode overlapping the second gate electrode comprises a first region extended in the first direction and a second region extended in the second direction, and wherein the second drain electrode and the third drain electrode are formed of a single drain pattern. ### Claim 17 (depends on 16) The display device of claim 16, wherein the drain pattern comprises the second drain electrode, the third drain electrode, and a drain contact disposed between the second drain electrode and the third drain electrode. ### Claim 18 (depends on 17) The display device of claim 17, wherein the second drain electrode and the third drain electrode are spaced apart from each other with the drain contact therebetween. ### Claim 19 (depends on 18) The display device of claim 18, wherein the second drain electrode is extended in a direction toward the adjacent second source electrode in the first direction from one side of the drain contact, and wherein the third drain electrode is extended in a direction toward the adjacent storage line in the second direction from the other side of the drain contact. ### Claim 20 (depends on 19) The display device of claim 19, wherein the first source electrode and the second source electrode are connected to each other, and wherein the first drain electrode and the second drain electrode are disposed adjacent to each other with the second source electrode therebetween.