Diagonal Nozzle Printing Apparatus Image Data Rotation
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Solution Overview
Problem
Printing apparatuses with nozzle rows arranged diagonally relative to the orthogonal direction of the print medium's transport direction face increased load and reduced printing speed due to complex image processing requirements.
Innovation Solution
A printing apparatus that includes a first processing unit for storing image data, a second processing unit for interpolation of faulty nozzle data, and a third processing unit for rotating and storing image data in a memory to simplify address calculation and facilitate burst transfer, allowing for efficient interpolation and output as print data, even when the nozzle row is diagonally arranged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the nozzle row is arranged diagonally in relation to the orthogonal direction of the transport direction, then the printing apparatus can achieve better print quality or coverage, but the image processing load becomes exceedingly great and printing speed reduces
Solution Approach 1:
The patent applies preliminary action by performing the rotation process on image data before the interpolation process. The third processing unit rotates the image data to align with the diagonal nozzle arrangement in advance, so that subsequent interpolation operations can proceed efficiently without excessive computational load, thus maintaining both print quality and printing speed
2Manufacturing precision
If the nozzle row is arranged diagonally in relation to the orthogonal direction of the transport direction, then the printing apparatus can achieve better print quality or coverage, but the image processing load becomes exceedingly great
Solution Approach 1:
The patent applies preliminary action by performing the rotation process on image data before the interpolation process. The third processing unit rotates the image data to align with the diagonal nozzle arrangement in advance, so that subsequent interpolation operations can proceed efficiently without excessive computational load, thus maintaining both print quality and printing speed
3Ease of operation
If image data is processed with rotation after interpolation, then the processing sequence is conventional, but address calculation becomes complex and processing time increases
Solution Approach 1:
The patent applies preliminary action by performing the rotation process on image data before the interpolation process. The third processing unit rotates the image data to align with the diagonal nozzle arrangement in advance, so that subsequent interpolation operations can proceed efficiently without excessive computational load, thus maintaining both print quality and printing speed
Data Source
AI summary
Image data which defines an ink amount to be ejected from each of a plurality of nozzles is stored in memory, the image data which is stored in the memory is subjected to an interpolation process corresponding to a faulty nozzle of a print head, the image data which is subjected to the interpolation process is subjected to a rotation process and the image data which defines the ink amount to be ejected and corresponds to each of the plurality of nozzles to be stored in the memory so as to be in a read-out order of the memory when the print head is positioned at a certain point in relation to the print medium, and the image data which is subjected to the rotation process is read out and output as the print data.