Print Head Activation Circuit for Adaptive Ink Discharge Control
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Solution Overview
Problem
Existing printing apparatuses face challenges in maintaining printing quality and preventing system breakdowns when a print head is replaced, due to variations in discharge characteristics and differing specifications, as existing activation methods are insufficient.
Innovation Solution
The print head incorporates individual information such as production number, serial number, and drive characteristics, including maximum voltage values, which are used to generate activation information for the drive signal selection circuit, allowing for adaptive ink discharge control and ensuring compatibility with the print head control circuit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If a print head is replaced in a printing apparatus, then the printing apparatus can continue to operate, but printing quality may deteriorate due to variations in discharge characteristics
Solution Approach 1:
The patent applies parameter changes by adjusting drive signal parameters (voltage, pulse width) based on the individual characteristics of the replaced print head. The control circuit reads individual information from the new print head and modifies drive signal parameters to compensate for variations in discharge characteristics, thereby maintaining printing quality despite print head replacement
Solution Approach 2:
The patent implements feedback by having the control circuit read individual information from the print head, compare it with stored reference data, and adjust drive signals accordingly. This closed-loop approach ensures that the printing apparatus adapts to the specific characteristics of each print head, preventing quality deterioration after replacement
2Adaptability or versatility
If a print head with different specifications is attached, then the printing apparatus can operate with different print heads, but the printing apparatus may break down due to specification mismatches
Solution Approach 1:
The patent applies preliminary action by performing activation processing before the print head becomes operational. The control circuit reads individual information from the attached print head, verifies compatibility by comparing it with stored reference data, and configures appropriate drive signals in advance. This prevents specification mismatches from causing system breakdowns while maintaining versatility in print head selection
Solution Approach 2:
The patent uses an intermediary approach by introducing activation processing as a mediation step between attaching a print head and operating the printing apparatus. This intermediate verification process checks specification compatibility and configures appropriate parameters, allowing the system to handle different print head specifications safely without causing breakdowns
3Manufacturing precision
If activation processing is performed for each print head, then printing quality can be maintained, but additional processing time and complexity are required
Solution Approach 1:
The patent applies preliminary action by performing activation processing automatically when a print head is attached, before normal printing operations begin. The control circuit reads individual information, determines appropriate drive signals, and stores them in advance, so that quality-consistent printing can proceed without repeated processing delays
Solution Approach 2:
The patent implements self-service by having the print head itself provide its individual information (such as identification data) to the control circuit during activation. This self-identification capability streamlines the activation process, reducing the time and complexity required compared to manual configuration or external programming
Data Source
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AI summary
There is provided a print head discharging a liquid from a nozzle, including: a memory circuit that stores individual information of the print head and individual activation information based on the individual information; a communication control circuit that controls communication between the print head and an outside; a discharge control circuit that controls discharge of the liquid; and a limiting circuit that limits liquid discharge control by the discharge control circuit, in which when a signal according to the individual activation information is input from the outside, the limiting circuit changes a limitation of liquid discharge control by the discharge control circuit.