公开(公告)号：US20190113574A1

公开(公告)日：2019-04-18

申请号：US16157432

申请日：2018-10-11

Applicant: ROHM CO., LTD.

Inventor： Yukihiro IWAMOTO ,  Masaya HIRAKAWA

IPC: G01R31/327 ,  H02H1/00 ,  G01R27/26

Abstract: A controller controls a plurality of sensor electrodes. To a plurality of sense pins, the plurality of sensor electrodes are connected. A plurality of capacitance detection circuits respectively measure capacitance values of the corresponding sense pins. A calibration circuit calibrates the plurality of capacitance detection circuits. A relative relationship among the respective capacitance values of the plurality of sense pins is used for abnormality detection.

公开(公告)号：US20170297345A1

公开(公告)日：2017-10-19

申请号：US15485865

申请日：2017-04-12

Applicant: ROHM CO., LTD.

Inventor： Hirotoshi USUI ,  Yukihiro IWAMOTO ,  Masaya HIRAKAWA ,  Masao NAKAJIMA

IPC: B41J2/175

CPC classification number: B41J2/17566 ,  B41J2/17513 ,  B41J2/17546 ,  B41J2002/17579

Abstract: A liquid container for accommodating a liquid includes: a plurality of detection electrodes mounted on the liquid container and connected to a detection circuit installed outside the liquid container, wherein the plurality of detection electrodes detects a tilt of the liquid container.

公开(公告)号：US20160124552A1

公开(公告)日：2016-05-05

申请号：US14993626

申请日：2016-01-12

Applicant: ROHM CO., LTD.

Inventor： Yukihiro IWAMOTO ,  Yuji SHIMADA

IPC: G06F3/044 ,  G06F3/047 ,  G06F3/041

CPC classification number: G06F3/044 ,  G01R27/2605 ,  G06F3/0416 ,  G06F3/047 ,  H03K17/962

Abstract: A capacitance voltage conversion circuit, which converts respective capacitances of a plurality of sensor capacitors into voltages, includes: a plurality of capacitance current conversion circuits disposed in respective correspondence with the sensor capacitors, each capacitance current conversion circuit configured to generate a detection current corresponding to a capacitance of a corresponding sensor capacitor; a current average circuit configured to average a plurality of detection currents, which are respectively generated by the capacitance current conversion circuits, to generate an average current; and a plurality of current voltage conversion circuits disposed in respective correspondence with the sensor capacitors, each current voltage conversion circuit configured to convert a difference current between a corresponding detection current and the average current into a voltage.

Abstract translation: 将多个传感器电容器的各个电容转换成电压的电容电压转换电路包括：与传感器电容器分别对应配置的多个电容电流变换电路，各电容电流变换电路构成为产生与 相应传感器电容器的电容; 电流平均电路，被配置为平均由电容电流转换电路分别产生的多个检测电流，以产生平均电流; 以及与传感器电容器分别对应地设置的多个电流电压转换电路，每个电流电压转换电路被配置为将相应的检测电流和平均电流之间的差电流转换为电压。