# US 8,772,789 B2 · Light-emitting device and electronic apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,772,789 B2 - Document ID: US8772789B2 - Status: Granted - Kind: B2 - Application number: 12/911,344 - Filed: 2010-10-25 - Published: 2011-02-10 - Granted: 2014-07-08 - Earliest claimed: 2005-11-30 - Assignees: Seiko Epson Corporation - Applicants: Takehiko Kubota; Eiji Kanda; Ryoichi Nozawa - Inventors: Takehiko Kubota; Eiji Kanda; Ryoichi Nozawa - Web page: https://patentgrep.com/patent/US8772789B2 ## CPC - H05B 44/00: Circuit arrangements for operating electroluminescent light sources (for operating light emitting diodes H05B45/00) - H10D 86/00: Integrated devices formed in or on insulating or conducting substrates, e.g. formed in silicon-on-insulator [SOI] substrates or on stainless steel or glass substrates - H10K 59/1315: {comprising structures specially adapted for lowering the resistance} - H05B 45/00: Circuit arrangements for operating light-emitting diodes [LED] - H10K 59/121: characterised by the geometry or disposition of pixel elements - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract A light-emitting device includes a drive transistor that controls a current to be supplied to a light-emitting element from a power supply line, an electrical continuity portion that electrically connects the drive transistor with the light-emitting element, an initializing transistor that is turned ON to diode-connect the drive transistor, and a connecting portion that electrically connects the drive transistor with the initializing transistor. The power supply line including a first portion extending in a first direction and a second portion extending in a second direction that crosses the first direction. The connecting portion being positioned in an area between the first and second power supply lines in plan view. ## Claims ### Claim 1 A light-emitting device, the light emitting device comprising: a light-emitting element that is disposed above a substrate; a power supply line that is disposed above the substrate; a first transistor that is disposed above the substrate, the first transistor having a first source, a first drain, and a first gate electrode, the first transistor controlling a first electrical connection between the power supply line and the light-emitting element; a second transistor that is disposed above the substrate, the second transistor having a second source, a second drain, and a second gate electrode, the second transistor controlling a second electrical connection between the first gate electrode and one of the first source and the first drain; and a connecting portion that electrically connects the first gate electrode to one of the second source and the second drain, the power supply line including a first power supply line extending in a first direction and a second power supply line extending in a second direction crossing the first direction, and the connecting portion being positioned between the first power supply line and the second power supply line in plan view. ### Claim 2 (depends on 1) The light-emitting device as set forth in claim 1, wherein the power supply line and the first transistor are electrically connected through a contacting portion arranged in the first power supply line. ### Claim 3 (depends on 1) The light-emitting device as set forth in claim 1, further comprising: an electrical continuity portion, which electrically connects the first transistor and the light-emitting element, the second power supply line being arranged between the electrical continuity portion and the connecting portion in plan view. ### Claim 4 (depends on 1) The light-emitting device as set forth in claim 1, wherein in a driving period, the first transistor is supplying current to the light-emitting element, and in a period before the driving period, the first transistor is diode-connected by the second transistor being in an on state. ### Claim 5 (depends on 1) The light-emitting device as set forth in claim 1, wherein the light-emitting element includes first and second electrodes, and the first electrode has a portion overlapping the power supply line in plan view. ### Claim 6 (depends on 1) The light-emitting device as set forth in claim 1, wherein the connecting portion and the power source line is formed in a first layer. ### Claim 7 (depends on 1) The light-emitting device as set forth in claim 1, wherein the first direction is a direction in which a data line extends. ### Claim 8 (depends on 1) An electronic apparatus, comprising: the light-emitting device as set forth in claim 1. ### Claim 9 A light-emitting device, the light emitting device comprising: a light-emitting element that is disposed above a plane of a substrate; a power supply line that is disposed above the plane of the substrate; a first transistor that is disposed above the plane of the substrate, the first transistor having a first source, a first drain, and a first gate electrode, the first transistor controlling a first electrical connection between the power supply line and the light-emitting element; a second transistor above the plane of the substrate, the second transistor having a second source, a second drain, and a second gate electrode, the second transistor controlling a second electrical connection between the first gate electrode and one of the first source and the first drain; and a connecting portion that electrically connects the first gate electrode to one of the second source and the second drain, the power supply line including a first power supply line extending in a first direction and a second power supply line extending in a second direction crossing the first direction, and the connecting portion being positioned between the first power supply line and the second power supply line when viewed from a third direction perpendicular to the plane of the substrate.