Liquid Discharging Head Scanning Control for Image Quality
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Solution Overview
Problem
The quality of images formed by a liquid discharging apparatus is compromised when the head accelerates or decelerates, as the deceleration distance is typically longer than the acceleration distance, leading to potential inaccuracies in image formation.
Innovation Solution
A liquid discharging apparatus with a scanning assembly and controller that adjusts the scanning direction and deceleration range to ensure the head moves at a constant velocity during image formation, prioritizing a longer deceleration distance over acceleration distance to maintain image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the head moves at constant velocity during image formation, then image quality is improved, but the recording speed is reduced due to longer deceleration distance
Solution Approach 1:
The scanning action is segmented into forward scanning and backward scanning directions. The controller selectively performs image formation only in the forward scanning direction when the deceleration range coincides with the discharging range, avoiding image formation during deceleration in the backward direction. This segmentation allows the system to maintain image quality while improving overall recording speed by utilizing both scanning directions effectively.
Solution Approach 2:
The controller dynamically adjusts the scanning action based on real-time conditions. When the deceleration range coincides with the discharging range in the forward scanning direction, the controller performs image formation. When the same condition occurs in the backward scanning direction, the controller skips image formation and only performs the scanning motion. This dynamic adjustment optimizes both image quality and recording speed.
2Manufacturing precision
If the deceleration distance is made longer than acceleration distance, then image formation accuracy is improved, but the overall scanning efficiency is reduced
Solution Approach 1:
The scanning cycle is segmented into forward scanning and backward scanning phases. Image formation is performed only during the forward scanning phase when deceleration occurs, while the backward scanning phase is used purely for repositioning without image formation. This segmentation eliminates the time loss associated with deceleration during image formation in the backward direction, improving overall scanning efficiency while maintaining image quality.
Solution Approach 2:
The system maintains continuous useful action by performing image formation during the forward scanning deceleration phase, and using the backward scanning phase purely for rapid repositioning. This ensures that the head is continuously productive - either forming images or moving to the next position - minimizing idle time and improving scanning efficiency.
Data Source
AI summary
A liquid discharging apparatus, having a head with nozzles, a scanning assembly, a conveyer, and a controller, is provided. The controller is configured to conduct actions including a conveying action and a scanning action. The scanning action includes a forward scanning action and a backward scanning action, in each of which a deceleration distance is longer than an acceleration distance. The controller is configured to determine, prior to conducting the forward scanning action, whether a deceleration range corresponding to the deceleration distance in the forward scanning action coincides with a discharging range in the forward scanning action. In a case where the controller determines that the deceleration range coincides with the discharging range, the controller is configured to conduct the backward scanning action, without conducting the forward scanning action, based on partial image data being a part of the image data corresponding to the forward scanning action.