# US 9,873,254 B2 · Inkjet printing device and method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,873,254 B2 - Document ID: US9873254B2 - Status: Granted - Kind: B2 - Application number: 15/185,234 - Filed: 2016-06-17 - Published: 2017-02-23 - Granted: 2018-01-23 - Earliest claimed: 2015-08-18 - Assignees: Boe Technology Group Co., Ltd. - Applicants: Boe Technology Group Co., Ltd. - Inventors: Dejiang Zhao - Web page: https://patentgrep.com/patent/US9873254B2 ## CPC - B41J 2/1606: {Coating the nozzle area or the ink chamber} - B41J 2/1433: {Structure of nozzle plates} - B41J 2002/14411: {Groove in the nozzle plate} - B41J: TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS ## Abstract An inkjet printing device and method are provided. The inkjet printing device includes a nozzle head; and the nozzle head is provided with a main printing unit and an auxiliary printing unit which share a common liquid supplying pipeline. The main printing unit is located at a middle of the nozzle head and is configured to perform inkjet printing of pixel patterns. The auxiliary printing unit is located at an edge of the nozzle head and is configured to perform inkjet printing of protective patterns. The protective patterns are configured to produce a solvent-protective atmosphere for the pixel patterns at an edge of every printing process. ## Claims ### Claim 1 An inkjet printing device, comprising: a nozzle head, the nozzle head being provided with a main printing unit and an auxiliary printing unit which share a common liquid supplying pipeline, the main printing unit being located at a middle of the nozzle head and being configured to perform inkjet printing of pixel patterns, the auxiliary printing unit being located at an edge of the nozzle head and being configured to perform inkjet printing of protective patterns, and the protective patterns being configured to produce a solvent-protective atmosphere for the pixel patterns at an edge of every printing process, wherein the main printing unit comprises a plurality of first nozzles located at a middle of the nozzle head, the plurality of first nozzles being disposed at an equal interval; and the auxiliary printing unit comprises a second nozzle located at an edge of the nozzle head, a distance from the second nozzle to an outermost first nozzle being smaller than a distance between adjacent first nozzles. ### Claim 2 (depends on 1) The inkjet printing device according to claim 1, wherein the distance from the second nozzle to the outermost first nozzle is one half of the distance between adjacent first nozzles. ### Claim 3 (depends on 1) The inkjet printing device according to claim 1, wherein a number of the second nozzles is an even number which is no smaller than two. ### Claim 4 (depends on 1) The inkjet printing device according to claim 1, further comprising a printing substrate, the printing substrate being provided with pixel layouts and protective layouts, the pixel layouts being disposed in correspondence to the main printing unit and configured to display the pixel patterns, the protective layouts being disposed in correspondence to the auxiliary printing unit and configured to allow the protective patterns to form the solvent-protective atmosphere. ### Claim 5 (depends on 4) The inkjet printing device according to claim 4, wherein the pixel layouts are distributed on the printing substrate in a matrix, and each of the pixel layouts includes a plurality of elongated-slot structures arranged in columns. ### Claim 6 (depends on 4) The inkjet printing device according to claim 4, wherein each of the protective layouts includes a plurality of circular-groove structures arranged in rows, and each of the circular-groove structures is located at a center of adjacent four protective layouts. ### Claim 7 (depends on 1) The inkjet printing device according to claim 1, further comprising an evaporation device configured to dry the printing substrate. ### Claim 8 An inkjet printing device, comprising: a nozzle head, the nozzle head being provided with a main printing unit and an auxiliary printing unit which share a common liquid supplying pipeline, the main printing unit being located at a middle of the nozzle head and being configured to perform inkjet printing of pixel patterns, the auxiliary printing unit being located at an edge of the nozzle head and being configured to perform inkjet printing of protective patterns, and the protective patterns being configured to produce a solvent-protective atmosphere for the pixel patterns at an edge of every printing process; and a controlling device configured to independently control the main printing unit and the auxiliary printing unit. ### Claim 9 (depends on 2) The inkjet printing device according to claim 2, wherein a number of the second nozzles is an even number which is no smaller than two. ### Claim 10 (depends on 3) The inkjet printing device according to claim 3, further comprising a printing substrate, the printing substrate being provided with pixel layouts and protective layouts, the pixel layouts being disposed in correspondence to the main printing unit and configured to display the pixel patterns, the protective layouts being disposed in correspondence to the auxiliary printing unit and configured to allow the protective patterns to form the solvent-protective atmosphere. ### Claim 11 (depends on 10) The inkjet printing device according to claim 10, wherein each of the protective layouts includes a plurality of circular-groove structures arranged in rows, and each of the circular-groove structures is located at a center of adjacent four protective layouts. ### Claim 12 (depends on 1) The inkjet printing device according to claim 1, further comprising a printing substrate, the printing substrate being provided with pixel layouts and protective layouts, the pixel layouts being disposed in correspondence to the main printing unit and configured to display the pixel patterns, the protective layouts being disposed in correspondence to the auxiliary printing unit and configured to allow the protective patterns to form the solvent-protective atmosphere. ### Claim 13 (depends on 2) The inkjet printing device according to claim 2, further comprising a printing substrate, the printing substrate being provided with pixel layouts and protective layouts, the pixel layouts being disposed in correspondence to the main printing unit and configured to display the pixel patterns, the protective layouts being disposed in correspondence to the auxiliary printing unit and configured to allow the protective patterns to form the solvent-protective atmosphere. ### Claim 14 (depends on 9) The inkjet printing device according to claim 9, further comprising a printing substrate, the printing substrate being provided with pixel layouts and protective layouts, the pixel layouts being disposed in correspondence to the main printing unit and configured to display the pixel patterns, the protective layouts being disposed in correspondence to the auxiliary printing unit and configured to allow the protective patterns to form the solvent-protective atmosphere. ### Claim 15 (depends on 1) The inkjet printing device according to claim 1, further comprising an evaporation device configured to dry the printing substrate. ### Claim 16 (depends on 1) The inkjet printing device according to claim 1, further comprising a controlling device configured to independently control the main printing unit and the auxiliary printing unit. ### Claim 17 (depends on 7) The inkjet printing device according to claim 7, further comprising a controlling device configured to independently control the main printing unit and the auxiliary printing unit. ### Claim 18 (depends on 11) The inkjet printing device according to claim 11, wherein the pixel layouts are distributed on the printing substrate in a matrix, and each of the pixel layouts includes a plurality of elongated-slot structures arranged in columns. ### Claim 19 An inkjet printing method, comprising: aligning a main printing unit to be located above pixel layouts of a printing substrate while aligning an auxiliary printing unit to be located above protective layouts of the printing substrate; connecting both the main printing unit and the auxiliary printing unit to a common liquid supplying pipeline, and independently controlling inkjet printing solutions, respectively; and displaying pixel patterns on the pixel layouts while producing a solvent-protective atmosphere on the protective layouts to allow a uniform film being formed at an edge of every printing process. ### Claim 20 (depends on 8) The inkjet printing device according to claim 8, wherein the main printing unit comprises a plurality of first nozzles located at a middle of the nozzle head, the plurality of first nozzles being disposed at an equal interval; and the auxiliary printing unit comprises a second nozzle located at an edge of the nozzle head, a distance from the second nozzle to an outermost first nozzle being smaller than a distance between adjacent first nozzles.