This paper proposes a novel micro light‐emitting diode (microLED) pixel circuit using pulse width modulation (PWM) driving for preventing wavelength shifts caused by characteristic of micro‐LED. In addition, the proposed circuit applies the internal Vth compensation method to remove external sensing structure.

This paper proposes the novel pixel circuit for Micro‐LED display. In order to solve screen distortion, when grayscale representation of Micro‐LED is generated, the emission time of Micro‐LED is controlled using the Pulse Width Modulation (PWM) method. In addition, we utilize the LTPO backplane technology to reduce leakage current from storage capacitor.

The novel pixel circuit was proposed for the microLED display.We applied the progressive emission and PWM to use tens of μA current and hundreds of us emission time in considering of EQE characteristic. The proposed circuit was verified to operate stably in depletion mode of a‐IGZO TFT.

A microfluidic device based on the polymerase chain reaction (PCR) technique for genetic diagnostics was designed and fabricated. The continuous-flow microfluidic PCR system was integrated with two heating blocks to increase the temperature in each zone (denaturation, annealing, and extension). To maintain a constant temperature, heat transfer was controlled by a temperature controller system while receiving real-time feedback of a thermocouple attached to the microchannel. The DNA amplification was evaluated by fluorescence imaging through agarose gel electrophoresis. The developed continuous-flow microfluidic PCR chip provides reliable amplification of the target DNA with a real-time system controller while maintaining the temperature.

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