# US 11,309,377 B2 · Pixel circuit and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,377 B2 - Document ID: US11309377B2 - Status: Granted - Kind: B2 - Application number: 16/751,809 - Filed: 2020-01-24 - Published: 2020-08-06 - Granted: 2022-04-19 - Earliest claimed: 2019-02-01 - Assignees: Joled Inc. - Applicants: Joled Inc. - Inventors: Masanori Ohara - Web page: https://patentgrep.com/patent/US11309377B2 ## CPC - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - H10K 59/131: Interconnections, e.g. wiring lines or terminals - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - H10K 59/353: {characterised by the geometrical arrangement of the RGB subpixels} - G09G 2300/0426: Layout of electrodes and connections - G09G 2310/0235: Field-sequential colour display - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes - G09G 2330/02: Details of power systems and of start or stop of display operation - H10D 84/981: {Power supply lines} - H10D 86/451: {characterised by the compositions or shapes of the interlayer dielectrics} - H10D 86/60: wherein the TFTs are in active matrices - H10K 59/1315: {comprising structures specially adapted for lowering the resistance} - 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 - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A pixel circuit disposed in a pixel region including three subpixel regions includes: three light-emitting elements that are disposed in the subpixel regions and have mutually different luminescent colors; one drive circuit that is disposed in a subpixel region serving as a first subpixel region, and supplies drive current to the three light-emitting elements in time division; and a positive power supply line serving as a first power supply line that is disposed in a subpixel region serving as a second subpixel region, and supplies power supply voltage to the drive circuit. ## Claims ### Claim 1 A pixel circuit disposed in a pixel region including three subpixel regions, the pixel circuit comprising: three light-emitting elements that are disposed in mutually different subpixel regions among the three subpixel regions and have mutually different luminescent colors; one drive circuit that is disposed in a first subpixel region and supplies drive current to the three light-emitting elements in time division, the first subpixel region being any one subpixel region among the three subpixel regions; and at least one first power supply line that is disposed in a second subpixel region and supplies power supply voltage to the one drive circuit, the second subpixel region being at least one subpixel region different from the first subpixel region among the three subpixel regions. ### Claim 2 (depends on 1) The pixel circuit according to claim 1, wherein the at least one first power supply line is provided in contact with opposite two sides of the second subpixel region and occupies at least half of an area of the second subpixel region in plan view. ### Claim 3 (depends on 1) The pixel circuit according to claim 1, further comprising: a blanket electrode which is disposed over an entirety of the pixel region and connected with the three light-emitting elements, and through which the drive current supplied to the three light-emitting elements flows; and a second power supply line disposed in a third subpixel region and connected with the blanket electrode in the third subpixel region, the third subpixel region being at least one subpixel region different from the first subpixel region among the three subpixel regions. ### Claim 4 (depends on 3) The pixel circuit according to claim 3, wherein the second power supply line is provided in contact with opposite two sides of the third subpixel region and connected with the blanket electrode over an entire length of the second power supply line. ### Claim 5 (depends on 3) The pixel circuit according to claim 3, wherein the second power supply line is provided in contact with opposite two sides of the third subpixel region and connected with the blanket electrode at one or more contact holes between the opposite two sides of the third subpixel region. ### Claim 6 (depends on 5) The pixel circuit according to claim 5, wherein the one or more contact holes include a plurality of contact holes that are disposed in a direction intersecting with the opposite two sides of the third subpixel region and are long in the direction, and the plurality of contact holes are spaced apart from each other. ### Claim 7 (depends on 5) The pixel circuit according to claim 5, wherein each of the one or more contact holes has a bottom surface and a side surface surrounding a periphery of the bottom surface, and at least part of the side surface of at least one of the one or more contact holes has a step-like cross-sectional shape including one or more flat portions. ### Claim 8 (depends on 7) The pixel circuit according to claim 7, further comprising a third power supply line including a same material as the at least one first power supply line, wherein the second power supply line is connected to the blanket electrode via the third power supply line on the bottom surface, and the blanket electrode is in contact with the third power supply line in at least one of the one or more flat portions. ### Claim 9 (depends on 5) The pixel circuit according to claim 5, wherein each of the one or more contact holes has a bottom surface and a side surface surrounding a periphery of the bottom surface, and at least part of the side surface of at least one of the one or more contact holes is inclined with respect to the bottom surface at an inclination angle of 20 degrees or more and 40 degrees or less. ### Claim 10 (depends on 1) A display device, comprising: a plurality of pixel circuits which are disposed in a matrix and each of which is the pixel circuit according to claim 1; a column power supply line provided in each of columns of the matrix by connection of first power supply lines of pixel circuits disposed in the column among the plurality of pixel circuits; and a surface electrode which is provided over an entirety of the matrix by connection of blanket electrodes of the plurality of pixel circuits disposed in the matrix.