FAILING NOZZLE COMPENSATION AND NON-UNIFORMITY CORRECTION IN INKJET PRINTING

• Main Authors: STEENKAMER ARNOLDUS, LEBOUILLE TOM, WELTEN PETRUS
• Format: Patent
• Language: Chinese; English
• Published: 11.01.2022
• Subjects: CALCULATING; COMPUTING; CORRECTION OF TYPOGRAPHICAL ERRORS; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; HANDLING RECORD CARRIERS; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; PERFORMING OPERATIONS; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; PRESENTATION OF DATA; PRINTING; RECOGNITION OF DATA; RECORD CARRIERS; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS

A method and system for detecting one or more failing nozzles in an inkjet printhead (12) of an inkjet printer (10) for printing an image on a substrate and compensating failing nozzles, as well as for correcting colour uniformity of a printed image in inkjet printing an image on a substrate are disclosed. The method comprises printing a first test pattern (30) on a dedicated substrate (16), which is optically scanned. From the scan failing nozzles are identified, which are to be compensated by other nozzles. To these compensating nozzles compensated nozzle control data are allocated, which are used in printing a second test pattern (36) that is also scanned and analysed for local deviations of colorimetric greyscale value. Corrected nozzle control data are allocated to the nozzles associated with the local deviation. 公开了用于检测用于在基板上印刷图像的喷墨印刷机(10)的喷墨印刷头(12)中的一个或更多个故障喷嘴并补偿故障喷嘴以及用于在基板上喷墨印刷图像时校正印刷的图像的颜色均匀性的方法和系统。该方法包括在专用基板(16)上印刷第一测试图案(30)，对第一测试图案进行光学扫描。从扫描中识别出要由其他喷嘴补偿的故障喷嘴。向这些补偿喷嘴分配用于印刷第二测试图案(36)的补偿喷嘴控制数据，也对第二测试图