# US 11,077,673 B2 · Electrostatic printing apparatus and electrostatic printing method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,673 B2 - Document ID: US11077673B2 - Status: Granted - Kind: B2 - Application number: 16/621,503 - Filed: 2018-06-04 - Published: 2020-04-16 - Granted: 2021-08-03 - Earliest claimed: 2017-06-13 - Assignees: HotaluX, Ltd. - Applicants: HotaluX, Ltd. - Inventors: Yoshikazu Sakaguchi - Web page: https://patentgrep.com/patent/US11077673B2 ## CPC - G03G 15/221: {Machines other than electrographic copiers, e.g. electrophotographic cameras, electrostatic typewriters} - B05B 5/025: Discharge apparatus, e.g. electrostatic spray guns - B05D 1/26: performed by applying the liquid or other fluent material from an outlet device in contact with, or almost in contact with, the surface - B05D 3/14: by electrical means - B41J 2/41: for electrostatic printing (B41J2/39 takes precedence) - H05B 33/10: Apparatus or processes specially adapted to the manufacture of electroluminescent light sources - H05B 33/22: characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers - H10K 50/10: OLEDs or polymer light-emitting diodes [PLED] - Y02E 10/549: Organic PV cells - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY - B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D) - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract The present invention provides an electrostatic printing apparatus that can produce a conductive transparent electrode substrate for use in an organic EL device or the like, which is inexpensive and highly reliable. The electrostatic printing apparatus of the present invention includes a power supply (13), a conductive ejection unit (11) that ejects an ink for forming an insulating film to a target electrode (22), a control unit (12) that applies a bias voltage to the conductive ejection unit (11), and a pulse control unit (14) that applies a pulse voltage to the target electrode (22). ## Claims ### Claim 1 An electrostatic printing apparatus comprising: a conductive ejection unit that ejects an ink for forming an insulating film to a target electrode, the conductive ejection unit including a cylindrical peripheral electrode and an ejection electrode disposed in the cylindrical peripheral electrode; a control unit that applies a bias voltage to the conductive ejection unit; and a pulse control unit that applies a pulse voltage to the target electrode. ### Claim 2 (depends on 1) The electrostatic printing apparatus according to claim 1, wherein the ejection electrode has a sharp tip on a target electrode side. ### Claim 3 (depends on 1) The electrostatic printing apparatus according to claim 1, further comprising: a grid that is disposed between an ejection side of the conductive ejection unit and the target electrode; and a second power supply, that is connected to the grid, the second power supply applying a voltage to the grid. ### Claim 4 (depends on 1) The electrostatic printing apparatus according to claim 1, further comprising: a plurality of conductive ejection units. ### Claim 5 (depends on 1) The electrostatic printing apparatus according to claim 1, wherein the target electrode is at least one of an indium tin oxide electrode or an auxiliary electrode. ### Claim 6 (depends on 1) The electrostatic printing apparatus according to claim 1, which is for producing a conductive transparent electrode substrate for use in an organic EL device, an organic light emitting transistor, or an organic solar cell. ### Claim 7 (depends on 1) The electrostatic printing apparatus according to claim 1, wherein the pulse control unit is connected between the control unit and the target electrode. ### Claim 8 (depends on 1) The electrostatic printing apparatus according to claim 1, further comprising: a power supply, that is connected to the conductive ejection unit and the control unit. ### Claim 9 An electrostatic printing method comprising: applying a bias voltage to a conductive ejection unit that includes a cylindrical peripheral electrode and an ejection electrode disposed in the cylindrical peripheral electrode; applying a pulse voltage to a target electrode; and supplying the conductive ejection unit with an ink for forming an insulating film to the target electrode by the conductive ejection unit. ### Claim 10 (depends on 9) The electrostatic printing method according to claim 9 further comprising: using an indium tin oxide electrode, or an indium tin oxide electrode and an auxiliary electrode as the target electrode. ### Claim 11 (depends on 9) The electrostatic printing method according to claim 9 further comprising: disposing a grid between an ejection side of the conductive ejection unit and the target electrode. ### Claim 12 An electrostatic printing method comprising: applying a bias voltage to a conductive ejection unit that includes a cylindrical peripheral electrode and an ejection electrode disposed in the cylindrical peripheral electrode; applying a pulse voltage to the target electrode; and supplying the conductive ejection unit with an ink for forming an insulating film to the target electrode on a substrate in order to produce a conductive transparent electrode substrate for use in an organic EL device, an organic light emitting transistor, or organic solar cell.