Element Substrate Data Discrimination Circuit for Inkjet Printheads
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Solution Overview
Problem
Conventional inkjet printheads face issues with data transfer errors during high-speed multicolor printing, leading to potential image quality degradation and inefficiencies in data management, particularly in full-line printheads with many orifices, where there is no time margin to reset memory and reload, causing operational disruptions and waste.
Innovation Solution
An element substrate with integrated function circuits, a data discrimination circuit, an error detection circuit, and a control circuit that allows for signal latching or resetting based on the role of each function circuit, enabling quick error handling by using pre-held data, thus maintaining print operations even with transfer errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data transfer rate is increased for high-speed printing, then productivity is improved, but data transfer errors occur more frequently leading to reliability deterioration
Solution Approach 1:
The patent applies preliminary action by pre-loading data into a memory buffer before actual printing operations. The data discrimination circuit预先 identifies and stores valid data packets, so that even if transfer errors occur during high-speed operation, the system can continue using pre-stored valid data without interruption, thus maintaining both high productivity and reliability
2Reliability
If error detection circuit is added to prevent image quality degradation, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent merges the error detection function into the existing data discrimination circuit. The data discrimination circuit performs both data validation and error detection functions in a single integrated component, rather than adding separate error detection circuits. This approach improves reliability through error detection while avoiding additional circuit complexity
Solution Approach 2:
The data discrimination circuit is designed to perform multiple functions: data validation, error detection, and control signal generation. By making this circuit multi-functional, the patent achieves reliable error detection without increasing overall device complexity, as the same circuit structure serves multiple purposes in the data processing pipeline
3Reliability
If memory reset and reload operations are implemented for error handling, then reliability is improved, but loss of time occurs due to operational interruptions
Solution Approach 1:
The patent uses preliminary action by maintaining a memory buffer that pre-stores valid data packets. When errors are detected during printing, the system can immediately switch to using pre-stored valid data from the buffer without needing to reset or reload memory, thus improving error recovery capability while minimizing printing interruptions and time loss
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 solution enables the element substrate to manage data transfer errors by latching or resetting signals according to the function circuit's role, ensuring continuous operation and preventing image quality degradation by using pre-held data, thus addressing the limitations of conventional systems.
Implementation Method 1
supplying a current to the heater to generate heat, and causing film boiling of ink to discharge the ink droplet
Implementation Method 2
causing film boiling of ink to discharge the ink droplet
Data Source
AI summary
An exemplary element substrate includes: function circuits for executing functions for a print operation; a discrimination circuit for receiving a data signal and transferring the received data signal to a corresponding function circuit in accordance with a result of discriminating the type of data included in the received data signal; and an error detection circuit for detecting whether a transfer error occurs in the received data signal. The detection result is reflected in a received latch signal and a received reset signal. In accordance with the executed functions, some function circuits are caused to latch the transferred data signal by the latch signal in which the detection result is reflected. On the other hand, remaining function circuits are caused to reset the transferred data signal by the reset signal in which the detection result is reflected.