Multi-Channel Imaging Head Swath Boundary Configuration
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-channel imaging systems face challenges in ensuring identical imaging characteristics across channels, leading to 'banding' artifacts at swath boundaries in color filter fabrication, which are difficult to eliminate due to thermal and mechanical drifts.
Innovation Solution
Configuring the imaging head to ensure that swath boundaries do not occur within visible portions of imaged features by determining the number of channels and disabling or adjusting them to image complete pattern features in a single scan, with options including overlapping or spacing channels to maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-channel imaging systems are used to reduce imaging time, then productivity is improved, but banding artifacts appear at swath boundaries due to channel-to-channel variations
Solution Approach 1:
The imaging system divides the image into multiple swaths processed by separate channels, then strategically positions swath boundaries within non-visible portions of periodic features (such as black matrix regions) to prevent visible discontinuities. This segmentation approach maintains high productivity while ensuring image uniformity by ensuring that boundary artifacts fall in non-critical areas.
Solution Approach 2:
The system applies different imaging characteristics to different regions by configuring channels to image complete periodic features, ensuring that swath boundaries occur only in regions where discontinuities are not visible (such as within black matrix portions), thereby maintaining local image quality where it matters most.
2Productivity
If the number of channels is increased to improve imaging speed, then productivity is improved, but channel-to-channel variations become more difficult to control
Solution Approach 1:
The system dynamically configures which channels are active based on the periodic feature dimensions and repeat distances, allowing flexible adaptation to different imaging requirements. This dynamic channel selection maintains productivity while managing complexity by only activating necessary channels for each specific imaging task.
Solution Approach 2:
The system changes operational parameters such as the number of active channels, swath width, and channel spacing based on the specific periodic features being imaged. This parameter optimization allows high productivity with reduced complexity by matching channel configuration to actual imaging needs rather than using maximum channels for all cases.
3Manufacturing precision
If swath boundaries are positioned within visible portions of features, then complete feature imaging is achieved, but banding artifacts become visible and manufacturing precision deteriorates
Solution Approach 1:
The imaging process segments the swath into multiple channels, and the system calculates optimal boundary positions that fall within non-visible portions of periodic features. This segmentation allows complete feature imaging while ensuring boundaries occur only where they cannot be visible, eliminating banding artifacts.
Solution Approach 2:
The system converts the potentially harmful effect of swath boundaries (which could create visible discontinuities) into a benefit by strategically positioning them within non-visible portions of features such as black matrix regions. This transforms what would be a defect into an acceptable characteristic, as the boundaries occur where they are either invisible or masked by existing pattern features.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach significantly reduces the visibility of banding artifacts at swath boundaries, improving the quality of color filters by ensuring consistent imaging characteristics across channels.
Implementation Method 1
A color filter substrate, also known as a dye-receiving element, is overlaid with a dye donor element (also known as a color transcription film) that is then imagewise heated to selectively transfer the dye or pigment from the donor to the receiver. The preferred method of imagewise heating is by means of a laser head preferably comprising a plurality of laser beams.
Implementation Method 2
Direct imaging systems typically employ laser heads with hundreds of individually modulated beams in parallel to reduce the time taken to complete the image.
Data Source
AI summary
Methods for imaging regular patterns are provided. A multi-channel imaging head is configured in accordance with the repeat of a pre-determined regular pattern such that no swath boundaries appear within the visibly imaged features of the pattern. The imaged articles have reduced visible banding due to the elimination of swath boundaries in the imaged features.