公开(公告)号：US11327100B2

公开(公告)日：2022-05-10

申请号：US16833886

申请日：2020-03-30

Applicant: ALPS ALPINE CO., LTD.

Inventor： Tatsumi Fujiyoshi ,  Takashi Sasaki ,  Tomoki Yamada

IPC: G01R27/26 ,  B60J5/04 ,  E05B81/76 ,  G01V3/08 ,  H03K17/955 ,  G06F3/044 ,  G06F3/041

Abstract: An electrostatic sensor includes a detection electrode, a shield electrode provided in a periphery of the detection electrode, a first power supply coupled to the detection electrode and configured to generate an AC voltage having a first amplitude, a second power supply coupled to the shield electrode and configured to generate an AC voltage having a second amplitude, a measuring device configured to measure a quantity of charge flowing from the first power supply to the detection electrode, and a control device coupled to the measuring device. The AC voltages generated by the first and second power supplies have the same frequency and the same phase. The second amplitude is larger than the first amplitude. A detection target on a side of a detection surface is detected based on a change in an electrostatic capacitance between the detection electrode and the detection target.

公开(公告)号：US11112920B2

公开(公告)日：2021-09-07

申请号：US16243447

申请日：2019-01-09

Applicant: ALPS ALPINE CO., LTD.

Inventor： Tomoki Yamada ,  Tatsumi Fujiyoshi

IPC: G06F3/044

Abstract: An input device includes at least one electrode including multiple detection terminals. The detection terminals are connected to an image data calculation unit. The image data calculation unit detects detection values that vary in accordance with an amount of electric charge detected through the detection terminals. Based on coefficient information values, the image data calculation unit calculates image data values each corresponding to capacitance of each of multiple sections. The coefficient information corresponds to different combinations of one of the multiple sections and one of the multiple detection terminals. The coefficient information represents a ratio of electric charge detected by the one of the detection terminals to an amount of electric charge charged in one of the sections.

公开(公告)号：US10331409B2

公开(公告)日：2019-06-25

申请号：US15713903

申请日：2017-09-25

Applicant: ALPS ALPINE CO., LTD.

Inventor： Tatsumi Fujiyoshi ,  Shinichi Sagawai ,  Kiyoshi Sasai

IPC: G06F7/548 ,  G06G7/16 ,  H03D7/14

Abstract: Provided is a sine wave multiplication device of simple configuration, broad input signal level range, and minimal fluctuation in characteristics due to temperature. A signal component that corresponds to a product of an input signal Si and the third harmonic wave of a first square wave W1 included in an output signal Su1; and a signal component that corresponds to a product of the input signal Si and the fifth harmonic wave of the first square wave W1 is canceled by: a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W2 included in an output signal Su2; and a signal component that corresponds to a product of the input signal Si and the fundamental wave of a second square wave W3 included in an output signal Su3.