Dynamic Ink Flow Control for Bubble-Free Printing
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Solution Overview
Problem
Existing printing technologies face issues with ink discharge defects due to air bubbles formed during the ink sucking operation, leading to unnecessary delays in starting the printing process.
Innovation Solution
A printing apparatus with a control unit that adjusts the printing mode based on the time elapsed since the last ink sucking operation, switching between high and low ink discharge rates to prevent air bubble-induced blockages without increasing overall printing time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a predetermined standby state is maintained after ink sucking operation, then air bubbles disappear and defective discharge is prevented, but printing time is unnecessarily increased
Solution Approach 1:
The patent applies dynamics by making the printing apparatus operational state dynamic rather than static. The control unit dynamically adjusts the printing operation based on the elapsed time since the last sucking operation, transitioning between different printing modes (first print mode for high-speed printing when time threshold is exceeded, second print mode for cautious printing when time threshold is not exceeded) to optimize both reliability and productivity
Solution Approach 2:
The patent changes the parameter of printing operation mode based on the time parameter. By monitoring the elapsed time since the sucking operation and comparing it with a predetermined threshold, the system changes the printing parameters (printing speed, ink discharge rate) to match the current state of air bubble dissipation, thereby preventing defective discharge without requiring a fixed standby period
2Reliability
If ink sucking operation is performed at predetermined time intervals, then ink storage structures are filled and discharge ports are prevented from clogging, but air bubbles are produced in the channel
Solution Approach 1:
The patent converts the harmful effect of air bubbles into a manageable parameter by using the time elapsed since sucking operation as a decision criterion. The control unit leverages the natural dissipation process of air bubbles over time, using this time parameter to intelligently control when to resume printing, thereby transforming the harmful air bubble presence into a controllable temporal parameter that optimizes both ink supply reliability and printing efficiency
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
Enables printing without ink discharge defects by dynamically adjusting the ink flow rate post-sucking operation, ensuring efficient and uninterrupted printing.
Implementation Method 1
a suction unit configured to suck ink to the discharge ports within the print head
Data Source
AI summary
In various embodiments, printing is performed in a print mode with a higher ink flow rate per unit time period in a case where a time period from a time when an ink sucking operation is performed is longer, and printing is performed in a print mode with a lower ink flow rate per unit time period in a case where the time period is shorter.