# US 9,437,140 B2 · Electro-optical 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 9,437,140 B2 - Document ID: US9437140B2 - Status: Granted - Kind: B2 - Application number: 14/593,252 - Filed: 2015-01-09 - Published: 2015-07-30 - Granted: 2016-09-06 - Earliest claimed: 2014-01-29 - Assignees: Seiko Epson Corporation - Applicants: Seiko Epson Corporation - Inventors: Hitoshi Ota; Masanori Iwasaki; Makiko Takahashi - Web page: https://patentgrep.com/patent/US9437140B2 ## CPC - G09G 3/3266: Details of drivers for scan electrodes - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - G09G 3/3225: using an active matrix - G09G 2300/0408: Integration of the drivers onto the display substrate - G09G 2330/04: Display protection - G09G 2330/06: Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - 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) ## Abstract An electro-optical device including a substrate; an array region which is formed on the substrate and in which a plurality of light emitting pixels are arranged two-dimensionally; first drive lines that are arranged in a row direction and are connected to each of the light emitting pixels; second drive lines that are arranged in a column direction and are connected to each of the light emitting pixels; a drive circuit that supplies a drive signal to at least one of the first drive line and the second drive line; an inspection terminal that is electrically connected to the drive circuit or the second drive lines; and an electrostatic protection circuit that is connected to the inspection terminal, in which at least a part of the electrostatic protection circuit overlaps the inspection terminal in a plan view. ## Claims ### Claim 1 An electro-optical device comprising: a substrate having a rectangular shape; an array region which is formed on the substrate and in which a plurality of light emitting pixels are arranged two-dimensionally; a mounting terminal that is formed in a region different from the array region on the substrate; a first drive line connected to light emitting pixels that are arranged in a row direction; a second drive line connected to light emitting pixels that are arranged in a column direction; a drive circuit that supplies a drive signal to at least one of the first drive line and the second drive line; an inspection terminal that is electrically connected to the drive circuit or the second drive line and that is disposed on a side different from a side on which the mounting terminal of the substrate is disposed; an electrostatic protection circuit that is connected to the inspection terminal; and an insulating sealing film that covers a surface of the inspection terminal, wherein at least a part of the electrostatic protection circuit overlaps the inspection terminal in a plan view, and wherein the mounting terminal is not covered by the insulating sealing film that covers the surface of the inspection terminal. ### Claim 2 (depends on 1) The electro-optical device according to claim 1, further comprising: an inspection circuit between the inspection terminal and the array region. ### Claim 3 (depends on 2) An electronic apparatus comprising: the electro-optical device according to claim 2. ### Claim 4 (depends on 1) The electro-optical device according to claim 1, wherein the electrostatic protection circuit has a shape having an area larger than an area of the inspection terminal in a plan view. ### Claim 5 (depends on 4) An electronic apparatus comprising: the electro-optical device according to claim 4. ### Claim 6 (depends on 1) The electro-optical device according to claim 1, wherein the mounting terminal is configured to be electrically connected to an external circuit, and wherein the inspection terminal is configured to be contacted with an inspection probe during manufacture of the electro-optical device. ### Claim 7 (depends on 6) An electronic apparatus comprising: the electro-optical device according to claim 6. ### Claim 8 (depends on 1) The electro-optical device according to claim 1, wherein the inspection terminal is disposed on three other sides different from the side on which the mounting terminal is disposed. ### Claim 9 (depends on 8) An electronic apparatus comprising: the electro-optical device according to claim 8. ### Claim 10 (depends on 1) The electro-optical device according to claim 1, wherein the electrostatic protection circuit is formed in a layer lower than the inspection terminal, and wherein a plurality of insulating layers exist between the electrostatic protection circuit and the inspection terminal which overlap in a plan view. ### Claim 11 (depends on 10) An electronic apparatus comprising: the electro-optical device according to claim 10. ### Claim 12 (depends on 1) The electro-optical device according to claim 1, wherein the electrostatic protection circuit has a transistor, and wherein a source of the transistor is connected to the inspection terminal, and a gate and a drain are connected to a substrate potential. ### Claim 13 (depends on 12) An electronic apparatus comprising: the electro-optical device according to claim 12. ### Claim 14 (depends on 1) An electronic apparatus comprising: the electro-optical device according to claim 1.