Droplet Deposition Speed and Precision via Segmented Detection
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Solution Overview
Problem
Existing droplet deposition technologies have a low depositing rate of droplets on a carrier, which limits their efficiency in applications such as biological cell distribution.
Innovation Solution
A device and method that include a droplet generator, a holding device, detectors for signal detection, and a transport device to move the holding device or droplet generator, allowing for independent droplet generation and high-speed deposition of droplets onto a carrier, with each droplet assigned a measured value for its content, enabling precise control and rapid deposition into individual wells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional droplet deposition technologies are used, then droplets can be deposited on a carrier, but the depositing rate is low
Solution Approach 1:
The system segments the droplet deposition process into independent parallel operations: multiple detectors simultaneously monitor different liquid sections while the droplet generator continuously produces droplets. This parallelization eliminates sequential bottlenecks and enables high-speed deposition by processing multiple droplets in parallel rather than sequentially
Solution Approach 2:
The detectors perform preliminary detection of liquid sections and droplets before deposition occurs. By detecting droplet formation and liquid properties in advance, the system can continuously generate droplets without waiting for real-time feedback, enabling the droplet generator to operate independently at maximum speed while maintaining deposition precision
2Measurement precision
If real-time detection and control of each droplet is implemented, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The detection function is segmented into multiple independent detectors, each monitoring specific liquid sections or droplets. This segmentation allows simultaneous measurement of multiple droplet properties without requiring a single complex detection system, thereby improving measurement precision while keeping individual detector components relatively simple
Solution Approach 2:
The system uses optical detectors to create information copies of droplet properties (such as particle content, concentration, or presence) without physically manipulating the droplets. These optical signals are then processed and stored in memory, enabling precise measurement without adding mechanical complexity to the physical droplet handling system
3Measurement precision
If droplet generation is controlled based on detector signals, then measurement accuracy is maintained, but depositing speed decreases
Solution Approach 1:
The detectors perform preliminary detection of liquid sections and droplet properties before the droplets reach the deposition point. This advance detection allows the system to record measurement data without delaying droplet generation, as the detection occurs in parallel with the continuous droplet production process
Solution Approach 2:
The system introduces an intermediary memory component that stores detection signals and their associated spatial information. This memory acts as a buffer between detection and deposition operations, allowing droplets to be generated continuously at high speed while measurement data is recorded and correlated in parallel, thus maintaining both speed and accuracy
Data Source
AI summary
A device for depositing liquid droplets onto a carrier includes a droplet generator and a holding device for the carrier, and a detector arranged to detect a signal for each liquid section or droplet, and a transport device for moving the holding device relative to the droplet generator and preferably a memory connected to the detector.