Inkjet Nozzle Suction Layout for Stagnant Ink Removal
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Solution Overview
Problem
Inkjet devices used in manufacturing display devices face discharge failures due to increased viscosity of ink in nozzles when not used for a sufficient period, leading to stagnant ink exposure and distorted discharge directions, affecting printing accuracy.
Innovation Solution
The inkjet device incorporates a spray member with a body and nozzle, along with first and second suction members having grooves, which move in specific paths to discharge ink stored in the body while sucking ink from the nozzle, maintaining optimal viscosity and preventing discharge failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the spray member is located at one side above the stage without performing printing process, then the device structure is simple, but the ink in the nozzle becomes stagnant and viscosity increases causing discharge failure
Solution Approach 1:
The suction member performs preliminary action by removing stagnant ink from the nozzle before the spray member moves to the printing position. This prevents viscosity increase and discharge failure, ensuring reliable ink discharge when printing begins without adding complex viscosity control systems.
2Productivity
If the printing process is not performed for a sufficient period of time, then the device operation is simple, but a film is formed at the exposed ink portion causing discharge failure
Solution Approach 1:
The suction member performs preliminary action by removing stagnant ink that would otherwise form films during idle periods. This maintains ink discharge reliability even when the device operates intermittently without requiring continuous printing or complex environmental controls.
3Quantity of substance
If the viscosity of the ink in the nozzle increases, then the ink storage is simple, but the ink discharge direction becomes distorted affecting printing accuracy
Solution Approach 1:
The suction member performs preliminary action by removing stagnant ink before it can increase in viscosity and distort discharge direction. This maintains printing accuracy by ensuring only fresh, properly viscous ink remains in the nozzle for precise deposition.
Solution Approach 2:
The suction member is integrated into the stage structure, allowing the system to self-maintain nozzle ink quality without external intervention. The suction member automatically removes stagnant ink during stage movement, maintaining printing precision without additional control systems.
4Reliability
If the spray member moves continuously to prevent ink stagnation, then the ink discharge reliability is improved, but the energy consumption increases
Solution Approach 1:
The invention extracts the function of preventing ink stagnation from the spray member's movement and assigns it to the suction member. The spray member can remain stationary or move minimally for printing, while the suction member periodically removes stagnant ink, reducing energy consumption compared to continuous spray member movement.
Solution Approach 2:
The suction member provides self-service by automatically removing stagnant ink during normal stage movement for substrate processing. This eliminates the need for separate ink maintenance operations and reduces overall system energy consumption while maintaining reliable ink discharge.
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
This configuration ensures consistent and accurate ink discharge onto substrates, preventing discharge failures and maintaining printing precision by managing ink viscosity and direction effectively.
Implementation Method 1
a first suction member, a second suction member... The first suction member may include a first groove, the first suction member being configured to suck the second ink discharged from the nozzle into the first groove
Data Source
AI summary
An inkjet device includes a stage, a first suction member, a second suction member, a spray member, and a substrate. The first suction member is at a first side surface of the stage. The second suction member is at a second side surface of the stage. The spray member is configured to store ink and to move above top surfaces of the stage, the first suction member, and the second suction member, the spray member including a body and a nozzle at a side of the body to discharge the ink. The substrate is on the stage in which the ink discharged from the spray member is printed on the substrate.