Ink-jet Recording Apparatus Ink Flow Control via Dot Counter Feedback
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Solution Overview
Problem
Ink-jet recording apparatuses face challenges in optimally controlling the amount of ink ejected to maintain satisfactory image quality and productivity, as existing systems lack precise mechanisms to adjust ink flow based on consumption and reservoir levels.
Innovation Solution
The apparatus includes a recording head with nozzles, an ink reservoir, an ink amount sensor, and a control portion that adjusts ink ejection based on the difference between calculated and measured ink consumption, using a dot counter to measure cumulative dots and an ink sensor to monitor reservoir levels, thereby optimizing ink flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the amount of ink ejected from the recording head is controlled based on fixed parameters, then the device complexity is reduced, but the manufacturing precision of image quality deteriorates
Solution Approach 1:
The control portion receives feedback from the dot counter regarding the cumulative number of dots ejected and from the ink amount sensor regarding the ink level in the reservoir. Based on this feedback, the control portion dynamically adjusts the ink ejection amount to maintain optimal image quality while preventing ink depletion.
Solution Approach 2:
The system uses its own operational data (dot count from dot counter and ink level from ink amount sensor) to automatically regulate its ink ejection process, eliminating the need for external manual intervention or complex external control systems.
2Productivity
If the ink ejection amount is increased to maintain productivity, then the productivity is improved, but the reliability of ink supply control deteriorates
Solution Approach 1:
The control portion continuously monitors the ink level via the ink amount sensor and adjusts the ink ejection amount dynamically. This feedback mechanism ensures reliable ink supply control even when productivity requirements demand higher ejection volumes, as the system can adapt in real-time to prevent ink depletion.
3Manufacturing precision
If the ink ejection amount is precisely controlled based on multiple sensors and calculations, then the manufacturing precision of image quality is improved, but the device complexity increases
Solution Approach 1:
The control portion integrates the functions of the dot counter and ink amount sensor into a unified control mechanism. By combining these components and their data streams within a single control unit, the system achieves precise ink ejection control without proportionally increasing overall device complexity.
4Reliability
If the cumulative dot count is monitored and used to adjust ink ejection, then the reliability of ink consumption tracking is improved, but the device complexity increases
Solution Approach 1:
The dot counter serves multiple functions: it tracks the cumulative number of dots ejected for ink consumption calculation, and this same data is used by the control portion to dynamically adjust ink ejection amounts. This multi-functionality improves ink consumption tracking reliability without requiring separate dedicated measurement systems.
Data Source
AI summary
An ink-jet recording apparatus includes a recording head, an ink reservoir portion, an ink amount sensor, a dot counter, and a control portion. The ink reservoir portion stores ink to he ted to the recording head. The ink amount sensor senses the amount of ink in the ink reservoir portion. The dot counter for measures in a cumulative manner the number of dots in the ink ejected from the recording head. The control portion changes the amount of ink ejected from the recording head based on the difference between a calculated value of the amount of consumed ink as calculated based on the cumulative number of dots measured by the dot counter and a measured value of the amount of consumed ink as determined based on the amount of ink in the ink reservoir portion as sensed by the ink amount sensor.