Inkjet Substrate Processing Device Signal Splitter Resolution
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Solution Overview
Problem
Conventional jetting systems in display manufacturing have low printing resolution and are prone to signal delays due to cable length differences, which complicates ink application and requires a method to improve resolution and ensure precise ink discharge timing.
Innovation Solution
A substrate processing device and control method that utilize a signal splitter to generate predictive pulse waves based on the moving speed of the ink jetting body, allowing for higher resolution ink discharge control and ignoring noise between the encoder and signal splitter, ensuring accurate ink jetting even when pulse waves are omitted or overlapped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the encoder resolution is increased to improve printing resolution, then the printing resolution is improved, but the signal delay due to cable length difference becomes more significant
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing delay compensation values in a lookup table before the actual ink discharge process. The controller retrieves the appropriate delay value based on the encoder resolution and cable length configuration, allowing the system to compensate for signal delays without real-time calculations, thus maintaining high printing resolution while mitigating the time loss issue.
2Productivity
If multiple ink discharge controllers are connected in a daisy chain to improve productivity, then the production time is reduced, but the signal delay due to cable length difference increases
Solution Approach 1:
The patent applies local quality by implementing individual delay compensation for each ink discharge controller based on its specific cable length and position in the daisy chain. Each controller has its own delay value stored in the lookup table, allowing precise timing adjustment for each controller without affecting others, thus maintaining high productivity while compensating for signal delays in each specific location.
3Device complexity
If the encoder pulse waves are used directly for ink discharge control, then the system is simple, but the control time may change due to omitted or overlapped pulse waves
Solution Approach 1:
The patent introduces an intermediary approach by using a lookup table as a mediator between the encoder pulse waves and the ink discharge control. The lookup table stores pre-calculated delay compensation values that are retrieved and applied by the controller, creating a buffer that isolates the ink discharge control from direct variations in encoder pulse wave timing, thus maintaining reliable control time while adding minimal system complexity.
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 solution enhances printing resolution by generating more precise predictive pulse waves, improving ink discharge timing accuracy and reducing errors, thereby improving overall printing efficiency.
Implementation Method 1
a signal splitter configured to receive the moving speed of the ink jetting body by interlocking the speed measuring portion and transmit a predictive movement signal predicted according to the moving speed to the ink discharge controller
Implementation Method 2
The encoder generates the pulse waves at specific moving intervals of the discharge module transfer device, and an ink discharge controller receives the pulse waves
Implementation Method 3
Such a jetting system drives a nozzle of a head in a piezo manner while moving an inkjet head
Data Source
AI summary
The present invention provides a substrate processing device. An aspect of the present disclosure is to a substrate processing device and a control method for substrate processing device which can improve a resolution of a printer by determining a discharge time of an ink discharge controller with a higher resolution than a pulse wave generated by an encoder.