# US 2020/0286972 A1 · Display panel and display apparatus including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0286972 A1 - Document ID: US20200286972A1 - Status: Published application - Kind: A1 - Application number: 16/719,418 - Filed: 2019-12-18 - Published: 2020-09-10 - Earliest claimed: 2019-03-06 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: WOORI SEO; Injun Bae; Donghwi Kim; Chulho Kim; Yunhwan Park; Dongbeom Lee; Jin Jeon - Web page: https://patentgrep.com/patent/US20200286972A1 ## CPC - H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO} - G09G 3/3225: using an active matrix - G09G 3/3266: Details of drivers for scan electrodes - H10K 59/121: characterised by the geometry or disposition of pixel elements - H10K 59/1213: {the pixel elements being TFTs} - H10K 59/1216: {the pixel elements being capacitors} - H10K 59/131: Interconnections, e.g. wiring lines or terminals - H10K 77/10: Substrates, e.g. flexible substrates - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0439: Pixel structures - G09G 2300/0443: with several sub-pixels for the same colour in a pixel, not specifically used to display gradations (G09G3/364 takes precedence) - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - H10D 86/481: {integrated with passive devices, e.g. auxiliary capacitors} - H10D 86/60: wherein the TFTs are in active matrices - H10K 59/65: OLEDs integrated with inorganic image sensors - H10K 2102/00: Constructional details relating to the organic devices covered by this subclass - Y02E 10/549: Organic PV cells - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - 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 - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A display panel includes: a substrate that includes a display area and a sensor area, where the display area includes a main pixel and the sensor area includes an auxiliary pixel, where the main pixel is electrically connected to a main pixel circuit and the auxiliary pixel is electrically connected to an auxiliary pixel circuit, where the auxiliary pixel circuit includes a first auxiliary thin film transistor that includes a first semiconductor layer that includes an oxide semiconductor material and a first gate electrode that overlaps the first semiconductor layer, and a second auxiliary thin film transistor that including a second semiconductor layer that includes Low Temperature Poly-Silicon (LTPS) and a second gate electrode that overlaps the second semiconductor layer. ## Claims ### Claim 1 A display panel, comprising: a substrate that includes a display area and a sensor area, wherein the display area includes a main pixel and the sensor area includes an auxiliary pixel, wherein the main pixel is electrically connected to a main pixel circuit and the auxiliary pixel is electrically connected to an auxiliary pixel circuit, wherein the auxiliary pixel circuit includes a first auxiliary thin film transistor that includes a first semiconductor layer that includes an oxide semiconductor material and a first gate electrode that overlaps the first semiconductor layer, and a second auxiliary thin film transistor that includes a second semiconductor layer that includes Low Temperature Poly-Silicon (LTPS) and a second gate electrode that overlaps the second semiconductor layer. ### Claim 2 (depends on 1) The display panel of claim 1, wherein the first auxiliary thin film transistor drives the auxiliary pixel, and the second auxiliary thin film transistor includes a switching thin film transistor that transmits a data signal to the first auxiliary thin film transistor. ### Claim 3 (depends on 1) The display panel of claim 1, wherein the auxiliary pixel circuit further includes a third auxiliary thin film transistor that diode-connects the first auxiliary thin film transistor, and the third auxiliary thin film transistor includes a third semiconductor layer that includes an oxide semiconductor material and a third gate electrode that overlaps the third semiconductor layer. ### Claim 4 (depends on 3) The display panel of claim 3, wherein the auxiliary pixel circuit includes a fourth auxiliary thin film transistor that initializes a voltage of the first gate electrode of the first auxiliary thin film transistor, and the fourth auxiliary thin film transistor includes a fourth semiconductor layer that includes an oxide semiconductor material and a fourth gate electrode that overlaps the fourth semiconductor layer. ### Claim 5 (depends on 4) The display panel of claim 4, wherein the first semiconductor layer, the third semiconductor layer, and the fourth semiconductor layer are integrally arranged on a same layer. ### Claim 6 (depends on 1) The display panel of claim 1, wherein the main pixel circuit includes a plurality of thin film transistors, and the plurality of thin film transistors each include Low Temperature Poly-Silicon (LTPS). ### Claim 7 (depends on 1) The display panel of claim 1, wherein the auxiliary pixel circuit further includes a storage capacitor that includes a lower electrode and an upper electrode that both overlap the first semiconductor layer, and the storage capacitor is located between the first semiconductor layer and the substrate. ### Claim 8 (depends on 7) The display panel of claim 7, wherein the second gate electrode includes a same material as the lower electrode of the storage capacitor. ### Claim 9 (depends on 1) The display panel of claim 1, wherein the first auxiliary thin film transistor includes a first gate electrode disposed above the first semiconductor layer and that at least partially overlaps the first semiconductor layer. ### Claim 10 (depends on 1) The display panel of claim 1, further comprising a component disposed under the substrate and that corresponds to the sensor area and includes an electronic element that emits or receives light. ### Claim 11 (depends on 1) The display panel of claim 1, wherein the auxiliary pixel circuit further includes an auxiliary connection line that electrically connects the first semiconductor layer to the second semiconductor layer, wherein the first semiconductor layer and the second semiconductor layer are respectively disposed on different layers. ### Claim 12 (depends on 11) The display panel of claim 11, wherein the first auxiliary thin film transistor further includes a connection electrode electrically connected to a source area or a drain area of the first semiconductor layer, and the auxiliary connection line includes a same material as the connection electrode. ### Claim 13 (depends on 12) The display panel of claim 12, wherein the auxiliary pixel circuit further includes a data line that transmits a data signal to the auxiliary pixel, and the connection electrode includes a same material as the data line. ### Claim 14 (depends on 4) The display panel of claim 4, wherein the auxiliary pixel circuit includes a first scan line and a second scan line, each transmitting a scan signal to the auxiliary pixel, and the first scan line extends from the second gate electrode and the second scan line extends from the third gate electrode. ### Claim 15 (depends on 14) The display panel of claim 14, wherein the auxiliary pixel circuit includes a previous scan line that transmits a previous scan signal to the fourth auxiliary thin film transistor, and the previous scan line extends from the fourth gate electrode. ### Claim 16 (depends on 15) The display panel of claim 15, wherein the second scan line includes a same material as that of the previous scan line. ### Claim 17 (depends on 14) The display panel of claim 14, wherein the auxiliary pixel includes a pixel electrode, and the auxiliary pixel circuit includes a next scan line and a seventh auxiliary thin film transistor that turns on and initializes the pixel electrode in response to a next scan signal received through the next scan line, the seventh auxiliary thin film transistor includes a seventh semiconductor layer and a seventh gate electrode that overlaps the seventh semiconductor layer, and the next scan line extends from the seventh gate electrode. ### Claim 18 (depends on 17) The display panel of claim 17, wherein the first scan line includes a same material as the next scan line. ### Claim 19 A display apparatus, comprising: a substrate that includes a display area and a sensor area, wherein the display area includes a main pixel and the sensor area includes an auxiliary pixel, wherein the main pixel includes a plurality of thin film transistors, and the plurality of thin film transistors each include Low Temperature Poly-Silicon (LTPS), wherein the auxiliary pixel comprises: a pixel electrode; a first auxiliary thin film transistor that drives the auxiliary pixel; a third auxiliary thin film transistor that diode-connects the first auxiliary thin film transistor; a fourth auxiliary thin film transistor that initializes a voltage of a gate electrode of the first auxiliary thin film transistor, a second auxiliary thin film transistor that transmits a data signal to the first auxiliary thin film transistor; and a seventh auxiliary thin film transistor that that turns on and initializes the pixel electrode, wherein the first auxiliary thin film transistor, third auxiliary thin film transistor and the fourth auxiliary thin film transistor each include a semiconductor layer that includes Low Temperature Poly-Silicon (LTPS) and a gate electrode that overlaps the semiconductor layer, and the second auxiliary thin film transistor and the seventh semiconductor layer each include an oxide semiconductor layer and a gate electrode that overlaps the oxide semiconductor layer. ### Claim 20 (depends on 19) The display apparatus of claim 19, further comprising a component disposed under the sensor area of the substrate and that includes an electronic element that emits or receives light, wherein a resolution of an image displayed in the sensor area is lower than a resolution of an image displayed in the display area.