Recording Head Error Detection and Data Reconstruction
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Solution Overview
Problem
In recording apparatuses, errors in transfer data for the recording head can lead to malfunctions and inappropriate recording due to the difficulty in transferring all commands within the shortened transfer period, especially when the configuration relies on converting control data into commands and transferring them, which can result in outdated drive waveform settings for recording elements, causing insufficient or excessive energy supply and stress on the recording head.
Innovation Solution
A recording apparatus with a controller that converts recording and control data into command format transfer data and includes an error detection unit in the recording head to detect errors, allowing the controller to reconstruct and transmit corrected transfer data, ensuring that only necessary commands are included in subsequent data transfers to prevent malfunctions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If control data is converted into commands and transferred only when needed (e.g., only when data changes), then the transfer period of control data can be shortened, but errors in commands or control data would continue until the next command is received, causing inappropriate recording or recording head malfunction
Solution Approach 1:
The patent applies preliminary action by having the recording head proactively send a notification signal to the controller when it detects an error in received commands or control data. This allows the controller to preemptively retransmit corrected data before the error can cause malfunction or inappropriate recording, thus resolving the contradiction between shortened transfer periods and error continuity.
Solution Approach 2:
The patent implements feedback by establishing a two-way communication mechanism where the recording head notifies the controller of errors through a notification signal. This feedback loop enables the controller to detect and correct errors promptly, preventing error propagation while maintaining efficient data transfer, thereby resolving the reliability issue associated with shortened transfer periods.
2Productivity
If the number of discharge ports in the recording head is increased and ejection frequency is heightened to improve recording speed, then recording speed increases, but the amount of transfer data increases and transfer period shortens, making complete command transfer difficult
Solution Approach 1:
The feedback mechanism allows the recording head to immediately notify the controller of any errors in the high-frequency data transfer environment. This enables rapid error detection and correction, ensuring data integrity even as transfer periods shorten due to increased recording speed requirements.
Solution Approach 2:
By having the recording head proactively detect and notify errors before they cause malfunction, the system can maintain high recording speeds while ensuring data accuracy through preemptive error handling.
3Productivity
If control data is transferred at high frequency with shortened transfer periods, then recording speed improves, but it becomes difficult to transfer all commands to the recording head with every transfer period
Solution Approach 1:
The notification signal mechanism provides feedback that confirms successful command reception and execution. If commands are missed or errors occur, the feedback system enables the controller to detect and retransmit the necessary commands, ensuring completeness despite high-frequency transfer constraints.
Solution Approach 2:
The system performs preliminary error detection at the recording head before commands can be lost or cause errors, allowing for proactive correction and ensuring complete command transfer even in high-speed operation.
Data Source
AI summary
A recording apparatus performs converting each of recording data and control data for controlling a recording head into transfer data in a command format and transmitting the transfer data to the recording head via a transmission path, and detecting, in the recording head, an error in the received transfer data, and, in the transmission after detecting the error, reconstructs next transfer data in such a manner that a command that has been included in the transfer data in which the error has occurred among commands concerning the control data and that is scheduled not to be included in the next transfer data is included in the next transfer data, and then transmits the next transfer data reconstructed.