Microfluidic system and driving method thereof

Abstract

The present invention discloses a microfluidic system and a driving method thereof. A plurality of photosensitive detection units comprising phototransistors and first gating transistors are employed to perform liquid drop position and size detection. The driving method comprises: In a collection time quantum, loading cut-off signals to a first scanning signal line to allow each phototransistor to be a closure state, loading conduction signals to a second scanning line to allow the first gating transistors to be conducted, and determining a liquid drop position through detection of signal difference according to a feature that there is difference in a received light intensity received by the phototransistors according to determination of whether there is liquid drop coverage or not, so that detection is performed based on photosensitivity to avoid signal interference and facilitate improvement of detection precision; and in a driving time quantum, loading conduction signals to a third scanning signal line to allow driving transistors to transmit driving signals to driving electrodes to control motion locus of liquid drops. Driving units and the photosensitive detection units in the microfluidic system all employ transistors with no need for arrangement of other detection devices so as to improve manufacturing efficiency.

Description

technical field [0001] The invention relates to the field of micro-control technology, in particular to a micro-fluid control system and a driving method thereof. Background technique [0002] Microfluidic systems are currently used in many fields, especially in chemistry and medicine. Microfluidic systems have unparalleled advantages for various chemical experiments. At present, the microfluidic system generally detects the position and size of the droplet by detecting the impedance, and then controls the driving electrode through the switching transistor to control the trajectory of the droplet. Therefore, a device for detecting impedance needs to be separately provided in the microfluidic system, which makes the fabrication of the microfluidic system more complicated. Moreover, when detecting impedance, it is easy to be interfered by signals, which is not conducive to the accuracy of detection. Contents of the invention [0003] In view of this, an embodiment of the ...

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Problems solved by technology

Therefore, it is necessary to separately set up a device for detecting impedance in the microfluidic system, which makes the fabrication of the microfluidic system more complicated.

Moreover, when detecting impedance, it is susceptible to signal interference, which is not conducive to the accuracy of detection

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