Ink jet image forming apparatus, and method for compensating defective nozzle thereof

一种成像装置、喷嘴的技术，应用在打印装置、矩阵打印机的视觉表示、印刷等方向，能够解决影响打印质量等问题

Inactive Publication Date: 2007-05-02
HEWLETT PACKARD DEV CO LP
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  • Abstract
  • Description
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Problems solved by technology

However, this method cannot be used in cases where a nozzle that ejects a color ink other than black (i.e., cyan, magenta, or yellow) fails
When any of the nozzles used for compensation also fails, use other colors such as deep red (yellow + magenta), green (cyan + yellow) and blue (cyan + magenta) for compensation, which are different from paint The blackening process or compound blackening process will seriously affect the print quality

Method used

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  • Ink jet image forming apparatus, and method for compensating defective nozzle thereof
  • Ink jet image forming apparatus, and method for compensating defective nozzle thereof
  • Ink jet image forming apparatus, and method for compensating defective nozzle thereof

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Embodiment Construction

[0045] Reference will now be made in detail to embodiments of the present invention, which are shown in the accompanying drawings, wherein like numerals represent like elements throughout. The embodiments are described below in order to explain the present invention by referring to the figures.

[0046] FIG. 3 is a schematic view showing an inkjet image forming apparatus 125 according to an embodiment of the present invention, and FIG. 4 is a view showing a driving mechanism of a print head.

[0047] Referring to FIGS. 3 and 4 , the inkjet imaging device 125 includes a paper feed cassette 120, a print head unit 105, a supporting member 114 facing the print head unit 105, a faulty nozzle detection unit 132 that detects the presence and position of a faulty nozzle of the nozzle unit 112. , a printing medium conveying unit for conveying the printing medium P along the first direction (x direction), and a loading unit 140 for loading the printed printing medium P sent out. In add...

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Abstract

An inkjet image forming apparatus and a method of defective nozzle compensation in the inkjet image forming apparatus. The method includes detection of an occurrence and a position of the defective nozzle in a nozzle unit, when the defective nozzle is detected, analyzing image information on image data which are to be printed at a compensated position which is a position printed with the defective nozzle and image data which are to be printed at positions adjacent to the compensated position, and exchanging the image data which are to be printed at the compensated position for image data which are to be printed at one of the adjacent positions according to the analyzed image information and performing printing. Missing dots caused by the defective nozzle are compensated by exchanging image data and performing printing. Accordingly, since the image data are exchanged and printed, it is possible to prevent deterioration in image quality such as a white band which can be easily perceivedby a user.

Description

technical field [0001] The present invention relates to an inkjet imaging system, in particular to an inkjet imaging system capable of compensating image quality degradation caused by a faulty nozzle and a method for compensating a faulty nozzle in the inkjet imaging system. Background technique [0002] In general, an inkjet image forming system is a device that forms an image by ejecting ink from a print head spaced apart from a printing medium at a predetermined interval and reciprocating in a direction perpendicular to a conveying direction of the printing medium. Such an inkjet image forming apparatus that forms an image by ejecting ink onto a printing medium with a print head that reciprocates in a direction perpendicular to the conveying direction of the printing medium is called a shuttle type inkjet image forming apparatus. A print head of a shuttle type inkjet image forming apparatus has a nozzle unit including a plurality of nozzles for ejecting ink. [0003] Rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/04B41J2/155B41J2/165B41J2/21G06K15/10
CPCB41J29/393B41J2/2139B41J2/2146B41J2/21B41J2/145
Inventor 特雷克霍夫·弗拉迪斯拉夫
Owner HEWLETT PACKARD DEV CO LP
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