# US 12,004,384 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 12,004,384 B2 - Document ID: US12004384B2 - Status: Granted - Kind: B2 - Application number: 18/051,951 - Filed: 2022-11-02 - Published: 2023-09-14 - Granted: 2024-06-04 - Earliest claimed: 2020-03-06 - Assignees: Samsung Display Co., Ltd. - Applicants: Samsung Display Co., Ltd. - Inventors: Jun Hyun Park; Hyeong Seok Kim; Young Wan Seo; Yu Jin Lee; Cheol Gon Lee - Web page: https://patentgrep.com/patent/US12004384B2 ## CPC - H10K 59/126: Shielding, e.g. light-blocking means over the TFTs - G09G 3/3233: with pixel circuitry controlling the current through the light-emitting element - H10D 86/423: {comprising semiconductor materials not belonging to the Group IV, e.g. InGaZnO} - H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics} - H10D 86/60: wherein the TFTs are in active matrices - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/0809: Several active elements per pixel in active matrix panels - 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 2300/0861: 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 2320/0233: Improving the luminance or brightness uniformity across the screen - G09G 2320/0238: Improving the black level - H10K: ORGANIC ELECTRIC SOLID-STATE 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) - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A display device includes a display panel having a general area including first subpixels, and a sensor area including second subpixels and light-transmitting area. Each of the first subpixels and the second subpixels includes a first active layer disposed on a substrate and formed of a first material, a first gate layer disposed on the first active layer, a second gate layer disposed on the first gate layer, a second active layer disposed on the second gate layer and formed of a second material different from the first material, a third gate layer disposed on the second active layer, and a light-blocking layer disposed between the substrate and the first active layer and overlapping the second active layer in a thickness direction. ## Claims ### Claim 1 A display device, comprising a display panel, the display panel comprises: a plurality of first subpixels; a first active layer disposed on a substrate and formed of a first material; a first conductive layer disposed on the first active layer; a second conductive layer disposed on the first conductive layer; a second active layer disposed on the second conductive layer and formed of a second material different from the first material; a third conductive layer disposed on the second active layer; and a light-blocking layer disposed between the substrate and the first active layer and overlapping the first active layer in a thickness direction. ### Claim 2 (depends on 1) The display device of claim 1, wherein at least one of the first subpixels comprises: a driving transistor that controls a driving current provided to a light-emitting element, the driving transistor includes a gate electrode included in the first conductive layer, and an active area overlapping the gate electrode and included in the first active layer; and a first transistor that selectively provides an initialization voltage to a first node that is a gate electrode of the driving transistor, the first transistor includes a first gate electrode included in the third conductive layer, and a first active area overlapping the first gate electrode and included in the second active layer. ### Claim 3 (depends on 2) The display device of claim 2, wherein at least one of the first subpixels further comprises a second transistor that selectively connects the first node and a second node that is a drain electrode of the driving transistor, the second transistor includes a second gate electrode included in the third conductive layer, and a second active area overlapping the second gate electrode included in the second active layer. ### Claim 4 (depends on 3) The display device of claim 3, wherein at least one of the first subpixels further comprises a third transistor that selectively provides a data voltage to a third node that is a source electrode of the driving transistor, the third transistor includes a third gate electrode included in the first conductive layer, and a third active area overlapping the third gate electrode and included in the first active layer. ### Claim 5 (depends on 4) The display device of claim 4, wherein at least one of the first subpixels further comprises a fourth transistor that selectively connects the driving voltage line and the third node, the fourth transistor includes a fourth gate electrode included in the first conductive layer, and a fourth active area overlapping the fourth gate electrode and included in the first active layer. ### Claim 6 (depends on 5) The display device of claim 5, wherein at least one of the first subpixels further comprises a fifth transistor that selectively connects the second node and a fourth node that is an anode electrode of the light-emitting element, the fifth transistor includes a fifth gate electrode included in the first conductive layer, and a fifth active area overlapping the fifth gate electrode and included in the first active layer. ### Claim 7 (depends on 6) The display device of claim 6, wherein at least one of the first subpixels further comprises a sixth transistor that selectively provides the initialization voltage to the fourth node, the sixth transistor includes a sixth gate electrode included in the first conductive layer, and a sixth active area overlapping the sixth gate electrode and included in the first active layer. ### Claim 8 (depends on 2) The display device of claim 2, wherein the display panel further comprises a general area comprising the first subpixels, and a sensor area comprising a plurality of second subpixels and a light transmitting area, the light transmitting area transmits light therethrough. ### Claim 9 (depends on 8) The display device of claim 8, at least one of the second subpixels comprises: a driving transistor that controls a driving current provided to a light-emitting element, the driving transistor includes a gate electrode included in the first conductive layer, and an active area overlapping the gate electrode and included in the first active layer; and a first transistor that selectively provides an initialization voltage to a first node that is a gate electrode of the driving transistor, the first transistor includes a first gate electrode included in the third conductive layer, and a first active area overlapping the first gate electrode and included in the second active layer. ### Claim 10 (depends on 9) The display device of claim 9, at least one of the second subpixels comprises a second transistor that selectively connects the first node and a second node that is a drain electrode of the driving transistor, the second transistor includes a second gate electrode included in the third conductive layer, and a second active area overlapping the second gate electrode included in the second active layer. ### Claim 11 (depends on 10) The display device of claim 10, at least one of the second subpixels further comprises a third transistor that selectively provides a data voltage to a third node that is a source electrode of the driving transistor, the third transistor includes a third gate electrode included in the first conductive layer, and a third active area overlapping the third gate electrode and included in the first active layer. ### Claim 12 (depends on 11) The display device of claim 11, at least one of the second subpixels further comprises a fourth transistor that selectively connects the driving voltage line and the third node, the fourth transistor includes a fourth gate electrode included in the first conductive layer, and a fourth active area overlapping the fourth gate electrode and included in the first active layer. ### Claim 13 (depends on 12) The display device of claim 12, at least one of the second subpixels further comprises a fifth transistor that selectively connects the second node and a fourth node that is an anode electrode of the light-emitting element, the fifth transistor includes a fifth gate electrode included in the first conductive layer, and a fifth active area overlapping the fifth gate electrode and included in the first active layer. ### Claim 14 (depends on 13) The display device of claim 13, at least one of the second subpixels further comprises a sixth transistor that selectively provides the initialization voltage to the fourth node, the sixth transistor includes a sixth gate electrode included in the first conductive layer, and a sixth active area overlapping the sixth gate electrode and included in the first active layer. ### Claim 15 (depends on 9) The display device of claim 9, wherein the second conductive layer comprises a metal layer overlapping the second active layer in the thickness direction. ### Claim 16 (depends on 15) The display device of claim 15, wherein the light-blocking layer does not overlap the metal layer in the thickness direction. ### Claim 17 (depends on 15) The display device of claim 15, wherein the metal layer of the first subpixels does not overlap the light-blocking layer in the thickness direction, wherein the metal layer of the second subpixels overlaps the light-blocking layer in the thickness direction. ### Claim 18 (depends on 9) The display device of claim 9, wherein the light-blocking layer of the second subpixels overlaps the second active layer in the thickness direction. ### Claim 19 (depends on 9) The display device of claim 9, wherein the light-blocking layer is electrically connected to a driving voltage line or an initialization voltage line. ### Claim 20 (depends on 1) The display device of claim 1, wherein the first active layer includes a silicon-based material, and the second active layer includes an oxide-based material.