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In this letter, a scan driver circuit that can generate scan signals only in a selected area is proposed. It refreshes only the area that needs to be updated without refreshing the whole display. The proposed circuit with ten stages was fabricated using oxide thin film transistors. The additional area for selective driving occupies only 14.5 % of the unit stage area. This study confirms that the power consumption in the data lines and pixels for a dot pattern can be reduced by 25 % and 37.5 % when 50 % and 25 % of scan lines are selected, respectively.

A new memory-in-pixel (MIP) circuit using oxide thin-film transistors (TFTs) to achieve low power consumption is proposed. The display employing the proposed pixel circuit can greatly reduce the power consumption due to extremely low leakage current of oxide semiconductor TFTs. By fabricating the circuit with oxide TFT process, the circuit performance under continuous operation is successfully verified without additional programming. The power consumption in the panel (except backlight) can be reduced to 0.03% of that of conventional LCD.

In this paper, an amplifier circuit using oxide TFTs for amplifying brain signal is proposed. The proposed circuit is largely composed of two TFTs. It consists of a driving transistor that receives an input and a load transistor that determines the voltage gain through interaction with the driving transistor. Based on depletion load inverting amplifier, we analyzed the small signal modeled circuit. By using a circular TFT called Corbino‐TFT, we were able to obtain a greater voltage gain. The measurement results were compared with the calculated voltage gain. In addition, to get a higher gain, method of connecting two amplifiers in series is presented and simulation results are also presented.