Handheld Printer Head Speed Control for Print Quality
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Solution Overview
Problem
Handy printers face print quality deterioration due to the print head's moving amount exceeding the main scanning line pitch, causing image stretching and distortion.
Innovation Solution
A manual-scanning printing device with a detector to monitor the print head's movement and a control circuit that adjusts printing based on detected speed, ensuring the print head moves at a reference distance corresponding to the print resolution, thereby maintaining print quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the print head moves at a speed where the moving amount per sampling cycle exceeds the main scanning line pitch, then printing speed is improved, but print quality deteriorates due to image stretching and distortion
Solution Approach 1:
The patent applies dynamics by making the printing timing adaptive to the actual moving speed of the printing head. The control circuit dynamically adjusts when to perform printing based on detected moving amount, allowing the system to operate at higher speeds while maintaining print quality. This resolves the contradiction by enabling speed improvement without sacrificing precision through real-time dynamic adjustment of printing timing.
Solution Approach 2:
The patent implements feedback by using a detector to continuously monitor the moving amount of the printing head and using this information to control printing timing. The control circuit receives feedback about actual position and adjusts printing decisions accordingly, ensuring that pixels are printed at correct intervals even when moving speed varies. This feedback mechanism allows high-speed operation while maintaining manufacturing precision.
2Device complexity
If the moving amount per sampling cycle is used directly for printing control, then device complexity is reduced, but print quality deteriorates due to inability to handle variable speeds
Solution Approach 1:
The patent applies self-service by enabling the printing device to automatically adjust its own printing timing based on self-detected moving amount. The detector and control circuit work together to make the system self-regulating, eliminating the need for complex external control mechanisms while maintaining print quality. The device monitors and adjusts itself, resolving the contradiction between simplicity and precision.
Solution Approach 2:
The patent changes the parameter used for printing control from fixed sampling cycle intervals to variable timing based on detected moving amount. By adjusting the printing timing parameter dynamically according to actual speed, the system maintains print quality without requiring complex mechanical control mechanisms. This parameter change approach keeps the device simple while achieving high precision.
Data Source
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AI summary
To provide a hand-held printing device, a printing method, and a storage medium that suppress deterioration in print quality. A manual-scanning printing device (1) includes a printing head (103a) configured to print an image on a printing medium (2) while moving relative to the printing medium (2); a detector configured to detect a relative moving amount of the printing head (103a) with respect to the printing medium (2) for each sampling cycle; and a control circuit configured to perform a first control to cause the printing head (103a) to perform printing when a moving speed of the printing head (103a) based on the moving amount detected by the detector and the sampling cycle is equal to or higher than a first moving speed at which the moving amount for each the sampling cycle becomes a reference distance corresponding to a print resolution of the printing head (103a), the printing being performed at a timing that is set in accordance with the moving speed.