Printhead Ejection Die Temperature Control via Segmentation
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Solution Overview
Problem
The temperature of inkjet ejection dies in printing devices can vary, affecting print quality by altering drop weight, dot size, and print density, leading to suboptimal performance unless accurately controlled.
Innovation Solution
Incorporating temperature sensors and heaters in the printheads to monitor and adjust the operational temperature of individual or groups of ejection dies, allowing for precise control and maintaining optimal performance across the printing system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If temperature control components (sensors and heaters) are added to each ejection die, then print quality consistency is improved, but device complexity increases
Solution Approach 1:
The printhead is divided into multiple independently controllable zones, with each ejection die or group of ejection dies having its own temperature sensor and heater. This segmentation allows individual temperature control for each zone, enabling precise compensation for temperature variations across different parts of the printhead while maintaining consistent print quality throughout.
Solution Approach 2:
Each ejection die or zone is equipped with dedicated temperature control components (sensor and heater) to maintain optimal temperature locally. This local quality approach ensures that each part of the printhead operates at its optimal temperature independently, compensating for local temperature variations without affecting other zones, thereby maintaining overall print quality consistency.
2Manufacturing precision
If individual temperature control for each ejection die is implemented, then dot size and drop weight control are improved, but manufacturing complexity increases
Solution Approach 1:
The temperature control system is segmented into multiple independent control units, each responsible for a specific ejection die or zone. Each unit includes a temperature sensor and heater that can be independently controlled, allowing precise adjustment of dot size and drop weight for each die without requiring complex integrated control systems.
Solution Approach 2:
The system controls dot size and drop weight by changing the temperature parameter of each ejection die independently. By adjusting the temperature of individual dies or zones, the system optimizes printing parameters without requiring mechanical adjustments or complex control mechanisms, simplifying manufacturing while maintaining precision.
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
Ensures consistent print quality by maintaining ejection dies within predetermined temperature ranges, enhancing dot size and drop weight control without requiring complex adjustments to the number of printing material drops.
Implementation Method 1
a corresponding heater that can be used to adjust the operational temperature of the dies
Implementation Method 2
including a corresponding temperature sensor or heat sensor, to detect the temperature of the dies
Data Source
AI summary
The present disclosure includes a description of an example printhead having multiple ejection dies. The ejection dies are coupled to a temperature sensor and send temperature signals to a controller. The printhead can also include a heater coupled to the ejection dies to apply heat to at least one ejection die.