Touch input detecting device using a single-ended integral OP-amp

Disclosed is a touch input sensing device, which comprises: a TX driving unit which controls rising and falling of a voltage of a driving electrode; a current conveyor unit including a current output terminal and a current input terminal connected to a sensing electrode; and a charge accumulation ha...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SIM WOO GEUN, KIM BOK MAN, SO BYEONG CHECL
Format: Patent
Sprache:eng ; kor
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Beschreibung
Zusammenfassung:Disclosed is a touch input sensing device, which comprises: a TX driving unit which controls rising and falling of a voltage of a driving electrode; a current conveyor unit including a current output terminal and a current input terminal connected to a sensing electrode; and a charge accumulation having an output terminal which accumulates charges provided from the current output terminal to output a voltage proportional to the amount of the accumulated charges. In both a rising edge section and a falling edge section of the voltage of the driving electrode, an output current exiting from the current output terminal is controlled to always have a constant direction. Therefore, it is possible to solve the problem of increasing the volume of a circuit. 구동전극의 전압의 상승과 하강을 제어하는 TX구동부, 전류출력단자 및 감지전극에 연결되는 전류입력단자를 포함하는 커런트 컨베이어부, 및 상기 전류출력단자로부터 제공된 전하를 누적하여 상기 누적된 전하의 양에 비례하는 전압을 출력하는 출력단자를 갖는 전하누적부를 포함하는 터치입력 감지장치를 공개한다. 이때, 상기 구동전극의 전압의 상승에지 구간과 하강에지 구간 모두에서 상기 전류출력단자로부터 빠져 나오는 출력전류가 언제나 일정한 방향을 갖도록 제어된다.