Application Cases

Experiment Name: Research Experiment on Intelligent Photoelectric Digital Microfluidic Chips and Systems

Experiment Content: Utilizing photoelectric wetting chips to achieve two-dimensional droplet driving on an open plane, investigating the impact of projected light patterns on droplet driving direction and rate, employing machine learning for real-time droplet detection, and integrating with the driving system to achieve feedback control and a series of multifunctional droplet manipulations.

Research Direction: Digital Microfluidic Technology

Testing Equipment: ATA-7030 high-voltage amplifier, signal generator, control computer, projector, high-definition scientific camera, etc.

Figure 1: Schematic diagram of the experimental setup for the research on intelligent photoelectric digital microfluidic chips and systems

Experiment Process: The driving voltage is applied to the bias electrodes on both sides of the chip by the signal generator and high-voltage amplifier, forming a lateral electric potential gradient on the microfluidic chip. Subsequently, patterns generated by computer programming are projected onto the chip surface via the projector. The photoconductive layer on the chip responds to the projected patterns, creating different potential differences. Under the action of electrowetting, a driving force for droplet movement is generated. Meanwhile, the camera performs real-time detection and positioning of the droplets, feeding back image/position signals to the controller, thereby enabling feedback control of the droplets according to functional requirements.

Experiment Results:

Figure 2: Experimental Results

The droplet feedback driving system, enhanced by AI image recognition, successfully achieved rapid detection, classification, and positioning of various droplets, as well as real-time tracking, feedback driving, and failure restart functions. The driving success rate of droplets under 600 Vpp increased from 30% in the non-feedback mode to 80% in the feedback driving mode. Additionally, the positional accuracy deviation of droplet driving was reduced to below 10%.

Power Amplifier Recommendation: ATA-7030 High-Voltage Amplifier

Figure: Specifications of the ATA-7030 High-Voltage Amplifier