Orthogonality Correction for Helical Scanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing orthogonality correction techniques in skewed printing systems often result in geometric distortions, particularly in helical scanning, leading to stair-case image features that can be visually objectionable and functionally problematic, especially in electronic components where high electrical resistance occurs at transition points.
Innovation Solution
A method involving the substitution of image data from one image data column to another within a recording head's channels, combined with assigning different image data portions to specific recording channels to compensate for helical scan distortions, ensuring image features are formed substantially parallel to the main-scan axis, thereby reducing geometric distortions and improving functional integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional orthogonality correction techniques are employed in helical scanning, then the scanning efficiency is improved, but geometric distortions and stair-case image features occur
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing corrected image data in a lookup table before the actual scanning process. The orthogonality correction factors are computed in advance based on the helical scan geometry, and this correction data is then applied during image formation to eliminate stair-case effects while maintaining scanning efficiency
Solution Approach 2:
The patent introduces an intermediary lookup table that stores pre-computed orthogonality correction data. This lookup table acts as a mediator between the image data and the scanning system, providing the necessary correction factors without requiring real-time complex calculations during the scanning process
2Manufacturing precision
If orthogonality correction is applied to compensate for helical scan distortions, then image features become parallel to main-scan axis, but transition points create high electrical resistance in electronic components
Solution Approach 1:
The patent applies local quality by detecting transition points in the image data and applying different processing strategies to these specific locations versus regular areas. At transition points, the system modifies the orthogonality correction approach to ensure continuous conductive paths, while maintaining standard correction elsewhere to preserve image feature alignment
Solution Approach 2:
The patent changes parameters locally at transition points by adjusting the correction factors or applying additional smoothing operations specifically at these locations. This parameter modification ensures that conductive paths remain continuous through transition regions while maintaining overall orthogonality correction benefits
3Manufacturing precision
If image data substitution between columns is performed, then visual artifacts are reduced, but data processing complexity increases
Solution Approach 1:
The patent reduces processing complexity during scanning by performing image data substitution in advance. The corrected image data is pre-computed and stored in a lookup table, eliminating the need for complex real-time data manipulation during the actual scanning and image formation process
Data Source
AI summary
A method for forming an image in a skewed recording apparatus comprising a recording head comprising a plurality of recording channels, the method includes providing an image data file comprising a plurality of image data columns; assigning different portions of each image data column to different recording channels; substituting first image data from a first image data column assigned to a first recording channel with second image data from a second image data column assigned to a second recording channel; and operating the recording head to form the image.