Inkjet Head Electric Field Nozzle Clogging Prevention
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Solution Overview
Problem
Inkjet printing apparatuses face clogging issues due to particle precipitation in the nozzle during non-spray modes, leading to inefficiencies and potential damage from ink residue.
Innovation Solution
Incorporating an electric field generating electrode within the inkjet head's filter part to create an electric field that prevents particles in the ink from settling and guides the ink flow, thereby preventing nozzle clogging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the inkjet head remains stationary during non-spray mode, then energy consumption is reduced, but particles in the ink precipitate and cause nozzle clogging
Solution Approach 1:
The patent applies periodic action by generating an electric field at specific intervals during non-spray mode to prevent particle precipitation. The electric field is activated periodically to maintain particle suspension without requiring continuous operation, thus balancing energy consumption with prevention of nozzle clogging.
Solution Approach 2:
The patent replaces the mechanical approach of continuously moving or pressurizing the inkjet head with an electric field-based system. Instead of using mechanical agitation or flow to prevent clogging, an electric field is applied to exert electrostatic forces on particles, keeping them suspended without mechanical movement.
2Reliability
If the inkjet head operates continuously to prevent particle settlement, then nozzle clogging is prevented, but energy consumption increases
Solution Approach 1:
The electric field is applied periodically rather than continuously during non-spray mode. This periodic application maintains particle suspension and prevents nozzle clogging while significantly reducing energy consumption compared to continuous operation. The field is activated at intervals sufficient to prevent precipitation but not requiring constant energy input.
Solution Approach 2:
The electric field system provides self-service by automatically preventing particle settlement during non-spray mode without requiring external intervention. The system self-regulates the electric field application to maintain nozzle cleanliness while minimizing energy consumption, eliminating the need for manual cleaning or continuous mechanical agitation.
3Reliability
If an electric field is applied continuously to prevent particle precipitation, then nozzle clogging is prevented, but device complexity increases
Solution Approach 1:
The electric field is applied periodically rather than continuously, which simplifies the control system and reduces the complexity of the electric field generation apparatus. The periodic application requires less sophisticated control mechanisms compared to continuous operation, while still effectively preventing particle precipitation and nozzle clogging.
Solution Approach 2:
The patent introduces an intermediary control mechanism that manages the electric field application timing and duration. This intermediary system coordinates between the non-spray mode detection and electric field generation, simplifying the overall device architecture by providing a clear control pathway without requiring complex continuous monitoring and adjustment systems.
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
The electric field effectively keeps particles suspended, preventing clogging and ensuring continuous operation by maintaining ink flow even during non-spray modes, thus enhancing the reliability and longevity of the printing apparatus.
Implementation Method 1
An electric field generating electrode is disposed in the filter part. The electric field generating electrode may generate an electric field in the inkjet head in the non-spray mode, and may guide a flow of an ink remaining in the inkjet head by the electric field.
Implementation Method 2
the electric field generating electrode and/or the filter part may prevent particles in the ink remaining in the inkjet head from settling or precipitating downward in the inkjet head, and prevent clogging of the nozzle.
Data Source
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AI summary
An inkjet printing apparatus includes a stage on which a target substrate is mounted, and an inkjet head positioned above the stage, wherein the inkjet head includes an ejection part including a plurality of nozzles that spray ink containing a plurality of particles, a filter part disposed above the ejection part, and selectively passing the plurality of particles, and an electric field generating electrode that is disposed in the filter part and generates an electric field in the filter part.