Fluid Ejection Adjustment for Nozzle Volumetric Consistency
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Solution Overview
Problem
Existing assay processes are inefficient and prone to errors due to manual fluid dispensing, which can lead to inconsistent fluid volumes and increased signal/noise ratios, affecting the accuracy of results, especially in low-volume dispensing applications.
Innovation Solution
A microfluidic chip-based system utilizing inkjet-based technology for fluid dispensing, which includes an ejection adjustment system to enhance nozzle-to-nozzle volumetric consistency by using energy-based methods to reduce variation in dispensed drop volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual fluid dispensing is used, then operation simplicity is maintained, but manufacturing precision and reliability deteriorate due to inconsistent fluid volumes
Solution Approach 1:
The patent replaces manual mechanical dispensing operations with an automated inkjet-based fluid ejection system. The system uses electronically controlled nozzles to dispense fluid, substituting human hand operations with automated mechanical-electrical systems. This maintains operational simplicity from the user perspective while achieving precise, consistent fluid delivery through electronic control and automation.
Solution Approach 2:
The system incorporates self-adjustment mechanisms where the fluid ejection device automatically compensates for variations in ejection characteristics. The system monitors its own performance and adjusts parameters such as ejection energy or timing to maintain consistent fluid volumes without requiring manual intervention or calibration, enabling the device to service itself.
2Device complexity
If manual fluid dispensing is used, then device complexity is reduced, but reliability deteriorates due to errors and inconsistent volumes
Solution Approach 1:
The patent incorporates feedback mechanisms where the system monitors ejection characteristics and uses this information to adjust subsequent ejection parameters. Sensors detect variations in fluid ejection and feed this data back to the control system, which then modifies ejection energy, timing, or other parameters to compensate for deviations, ensuring consistent and reliable fluid delivery throughout operation.
Solution Approach 2:
The system dynamically changes operational parameters such as ejection energy, pulse duration, or nozzle activation timing based on detected conditions. By adjusting these parameters in real-time, the system maintains reliable and consistent fluid dispensing despite variations in fluid properties, temperature, or environmental conditions, without requiring complex mechanical structures.
3Ease of operation
If standard inkjet ejection is used, then ease of operation is maintained, but manufacturing precision deteriorates due to nozzle-to-nozzle variation
Solution Approach 1:
The patent applies local quality adjustments by individually tuning parameters for each nozzle based on its specific characteristics. Rather than treating all nozzles uniformly, the system identifies and compensates for individual nozzle variations through separate calibration or adjustment of ejection parameters for each nozzle, ensuring that each nozzle delivers consistent and accurate fluid volumes despite manufacturing tolerances.
Solution Approach 2:
The system performs preliminary characterization or calibration of each nozzle before full operation. By pre-measuring or pre-adjusting individual nozzle ejection characteristics and storing this information for use during operation, the system eliminates nozzle-to-nozzle variations before they affect dispensing accuracy, maintaining ease of operation while achieving high 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
The system achieves improved nozzle-to-nozzle dispensing accuracy, reduces signal noise, enhances sensitivity, and provides finer adjustments to ejection characteristics, leading to more precise and reliable results in fluid-based experiments.
Implementation Method 1
A microfluidic chip-based system utilizing inkjet-based technology for fluid dispensing
Implementation Method 2
an ejection adjustment system to enhance nozzle-to-nozzle volumetric consistency by using energy-based methods to reduce variation in dispensed drop volumes
Data Source
AI summary
In one example in accordance with the present disclosure, a fluid ejection system is described. The fluid ejection system includes a frame to retain a number of fluid ejection devices. Each fluid ejection device includes a reservoir disposed on a first side of the frame and a fluid ejection die disposed on an opposite side of the frame. Each fluid ejection die includes 1) a fluid feed slot formed in a substrate to receive fluid from the reservoir, 2) an array of nozzles formed in the substrate to eject fluid, and 3) an ejection adjustment system to selectively adjust an amount of fluid ejected from the fluid ejection devices.