Handy Printer Density Complementation via Reprint Detection
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Solution Overview
Problem
Conventional manual scanning type handy printers fail to ensure adequate ink ejection for pixels that have already undergone ink ejection, leading to density insufficiencies and suboptimal print quality, especially in multiple scanning operations.
Innovation Solution
The handy printer incorporates a scanning detection mechanism, an optical reading device, and a density complementation processing portion to detect scanning amounts and identify density insufficient parts, allowing for targeted reprinting to enhance image density and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the conventional handy printer clears image data of pixels for which ink ejection has been performed, then the device complexity is reduced and operation is simplified, but the print image quality deteriorates due to density insufficiencies in multiple scanning operations
Solution Approach 1:
The patent segments the image data management into two parts: pixels that have undergone ink ejection and pixels that have not. By maintaining separate tracking for these segments, the system can apply different processing rules to each segment, allowing comprehensive ink ejection across multiple scans while maintaining manageable data structures through systematic categorization of pixel states.
Solution Approach 2:
The patent performs preliminary action by clearing the flag indicating ink ejection completion for pixels in the current scan range before processing. This preliminary clearing ensures that the ink ejection process can be properly executed across multiple scanning operations, preventing density insufficiencies by preparing the data structure in advance to accommodate comprehensive ink application.
2Manufacturing precision
If the handy printer performs ink ejection for all pixels in each manual scanning operation, then the print image density is improved, but the loss of time increases due to repeated ink ejection operations
Solution Approach 1:
The patent implements dynamics by making the ink ejection process adaptive to the actual state of the recording medium. The system dynamically adjusts which pixels receive ink based on real-time detection of scanning progress and previous ejection history. This dynamic approach ensures complete ink coverage for density improvement while avoiding unnecessary repeated ejection operations, optimizing the balance between print quality and processing time.
Solution Approach 2:
The patent employs feedback mechanisms where the detection unit continuously monitors the scanning process and provides information about which pixels have already received ink. This feedback loop allows the control unit to make informed decisions about ink ejection, ensuring that pixels receiving ink are those that actually need it, thereby achieving complete coverage without wasteful repeated operations.
3Loss of time
If the conventional handy printer does not perform ink ejection again for pixels that have already undergone ink ejection, then the loss of time is reduced, but the print image quality deteriorates with density insufficiencies
Solution Approach 1:
The patent segments the pixel population into two distinct groups: pixels that have received ink and pixels that have not. By maintaining separate tracking for these segments through flag bits and detection mechanisms, the system can selectively apply ink ejection only to the appropriate segment (pixels needing ink) while skipping the other segment (pixels already processed). This segmentation enables time efficiency by avoiding redundant operations while ensuring complete coverage for quality.
Solution Approach 2:
The system uses feedback from the detection unit to determine the actual state of each pixel region. This feedback mechanism provides real-time information about whether ink ejection has been performed, allowing the control unit to make accurate decisions about whether to eject ink again. The feedback ensures that the decision to skip or repeat ink ejection is based on actual conditions, preventing both time waste and density insufficiencies.
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 solution ensures improved print image quality by identifying and reprinting density insufficient areas, thereby addressing the issue of ink ejection insufficiencies and maintaining high-quality prints across multiple scanning operations.
Implementation Method 1
an optical reading device 11, which optically reads an image in a recording medium and generates a read image
Data Source
AI summary
A print processing portion causes a print device to execute printing of a print image based on print data in accordance with a first scanning amount detected when manual scanning is performed at a first time. A density complementation processing portion causes the print processing portion to execute reprinting in accordance with a second scanning amount detected when the manual scanning is performed at at least a second time. When the manual scanning is performed at at least the second time, the density complementation processing portion identifies density insufficient parts in the print image printed by the print device based on the scanning amount and an image read by an optical reading device. Furthermore, the density complementation processing portion causes the print processing portion to execute the reprinting for the density insufficient parts.