Helical and Circular Scanning for Image Orthogonality
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Solution Overview
Problem
Existing image forming techniques using helical scanning suffer from orthogonality distortions, leading to geometric and functional issues, particularly in the formation of conductive and dielectric elements, which are exacerbated by the use of conventional orthogonality correction methods that introduce stair-case artifacts and electrical resistance variations.
Innovation Solution
A method combining helical and circular scanning techniques to form images, where orthogonality corrections are selectively applied based on the type of image feature, with helical scanning used for graphical elements and circular scanning for electronic elements to minimize distortions and maintain desired orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If helical scanning is used to form images, then image forming throughput is improved, but orthogonality distortions occur causing geometric inaccuracies
Solution Approach 1:
The patent segments the image data into different types (graphical elements vs. electronic elements) and applies different scanning methods to each segment. Graphical elements are formed using helical scanning for high throughput, while electronic elements requiring precise orthogonality are formed using circular scanning to eliminate distortion.
Solution Approach 2:
The patent applies different scanning qualities to different regions of the image based on local requirements. Electronic circuit elements that require precise geometric accuracy receive circular scanning treatment, while graphical elements can tolerate the faster helical scanning method with its associated distortions.
2Manufacturing precision
If conventional orthogonality correction methods are applied to helical scan data, then geometric distortions are reduced, but stair-case artifacts and electrical resistance variations are introduced
Solution Approach 1:
The patent extracts electronic elements from the overall image data and processes them separately using circular scanning. This removes them from the helical scan pathway that causes orthogonality distortions and subsequent correction artifacts, thereby eliminating the source of stair-case effects and electrical resistance variations.
Solution Approach 2:
The patent converts the potential harm of having to choose between speed and accuracy by using two scanning modes. The circular scanning mode, while slower, produces perfectly orthogonal data that requires no correction, thereby avoiding the harmful artifacts that result from correcting helical scan data.
3Productivity
If helical scanning is used for all image features, then productivity is maximized, but electronic elements suffer from orientation distortions affecting functionality
Solution Approach 1:
The patent dynamically selects the scanning method based on the type of image feature being formed. The system adapts between helical and circular scanning modes depending on whether graphical or electronic elements are being printed, optimizing both throughput and functionality for each element type.
Data Source
AI summary
A method for forming an image includes providing a media support comprising a cylindrical surface adapted to receive media; providing a recording head adapted to scan over the media; providing image data representative of the image; operating the recording head to form a first portion of the image in accordance with a first portion of the image data while helically scanning over the media; and operating the recording head to form a second portion of the image in accordance with a second portion of the image data while circularly scanning over the media.