Heater Chip Feedback Circuit for Power Bus Reliability
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Solution Overview
Problem
Conventional ink jet printing apparatuses face issues with heater chip reliability due to inadequate power connections, leading to failed ink ejection, as disconnects in the power bus can prevent heating elements from vaporizing ink, resulting in operational failures.
Innovation Solution
Incorporating a feedback circuit within the heater chip that monitors the power bus for electrical signals, allowing the printer to detect and indicate power delivery issues, ensuring proper functioning and enabling compensation for missing nozzles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a power bus is used to supply power to heating elements, then the heating elements can be powered to vaporize ink, but a bad connection at the power bus can lead to failure of the heating elements to fire ink droplets
Solution Approach 1:
The patent implements a feedback circuit that continuously monitors the power bus for electrical signals and provides feedback to the printer controller. This feedback mechanism allows the system to detect power connection issues in real-time and respond appropriately, thereby improving reliability by preventing undetected connection failures from causing complete operational failures.
Solution Approach 2:
The feedback circuit performs preliminary detection of power bus connections before critical failures occur. By monitoring the electrical signals on the power bus in advance, the system can identify potential connection issues and notify users or adjust operations before complete heater element failure occurs, preventing harmful operational failures.
2Reliability
If bi-directional communication is implemented between electronic elements, then testability and reliability are enhanced, but device complexity increases
Solution Approach 1:
The patent uses a feedback circuit that provides bi-directional communication between the heater chip and the printer controller. This feedback mechanism enhances testability by allowing the controller to monitor the status of power bus connections and heater elements, while the complexity is managed by implementing the feedback function through a relatively simple circuit design that leverages existing communication infrastructure.
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
Enhances the testability and reliability of the heater chip by identifying power connection problems, allowing the printer to adjust operations and notify users, thereby maintaining optimal performance.
Implementation Method 1
a feedback circuit that is coupled to the power bus and that is configured to indicate if the bus receives electrical signals
Implementation Method 2
a resistive heating element that is connected to the power bus
Data Source
AI summary
A heater chip that includes a circuit element, and a bus that can be used to power the circuit element. The heater chip also includes a feedback circuit that is coupled to the power bus. Particularly, the feedback circuit can be configured to indicate if the bus is powered the circuit element.