公开(公告)号：US11561638B2

公开(公告)日：2023-01-24

申请号：US17316345

申请日：2021-05-10

Applicant: PIXART IMAGING INC.

Inventor： Chi-Chieh Liao

IPC: G06F3/041 ,  G06F3/044

Abstract: There is provided a touch force sensor including a first drive electrode, a second drive electrode and a receiving electrode. The first drive electrode is used to form a first capacitance with the receiving electrode. The second drive electrode is used to form a second capacitance with the receiving electrode. The receiving electrode shields the first drive electrode such that when a conductor approaches the receiving electrode, only the second capacitance is changed but the first capacitance is not changed. The first capacitance is changed only when the conductor gives a force upon the receiving electrode.

公开(公告)号：US11051758B2

公开(公告)日：2021-07-06

申请号：US16591651

申请日：2019-10-03

Applicant: PixArt Imaging Inc.

Inventor： Che-Chia Hsu ,  Jian-Cheng Liao ,  Yu-Han Chen ,  Chi-Chieh Liao

IPC: A61B5/00 ,  G04G21/02 ,  H03K17/955 ,  G06F1/16

Abstract: A wearable electronic device with a function of detecting a wearing state, comprising: at least one electrode; a capacitance calculating circuit, coupled to the electrode, configured to calculate a capacitance variation generated by at least one of the electrode; and a wearing state determining circuit, coupled to the capacitance calculating circuit, configured to determine the wearing state according to the capacitance variation. By this way, the wearing state can be auto detected and the wearable electronic device can be correspondingly control according to the wearing state.

公开(公告)号：US10379638B2

公开(公告)日：2019-08-13

申请号：US14593043

申请日：2015-01-09

Applicant: PIXART IMAGING INC.

Inventor： Chi-Chieh Liao ,  Han-Shu Lin ,  Tse-Chung Su

IPC: G09G1/00 ,  G06F3/038 ,  G06F3/041 ,  G06F3/0354 ,  G06F3/02

Abstract: A method of determining an adaptive DPI curve includes the steps of: detecting, by a sensing element, an object on a touch surface and outputting a detected frame; calculating, by a processing unit, a contact range according to the detected frame; and determining a DPI curve according to the contact range.

公开(公告)号：US10261687B2

公开(公告)日：2019-04-16

申请号：US15651030

申请日：2017-07-17

Applicant: PIXART IMAGING INC.

Inventor： Yu-Han Chen ,  Chien-An Chen ,  Chi-Chieh Liao

IPC: G06F3/048 ,  G06F3/044 ,  G06F3/0488 ,  G06F3/02 ,  G06F3/038 ,  H03K17/96 ,  G06F1/22 ,  G06F3/041

Abstract: Provided herein are a pin sharing circuit, a pin sharing method and an electronic device, an electronic wire using the same. The pin sharing circuit enables at least one pin on an integrated circuit to be shared by a keyboard device and a touch panel and prevents signal interference between the keyboard device and the touch panel using an impedance element disposed on a wire for the pin, such that the pin can output or receive a stimulation signal and a sensor signal that contain both an AC component and a DC component so as to enhance the efficiency of the overall system and prevent the stimulation signal and the sensor signal from conflicts between the keyboard device and the touch panel.

公开(公告)号：US20160211302A1

公开(公告)日：2016-07-21

申请号：US14686777

申请日：2015-04-14

Applicant: PixArt Imaging Inc.

Inventor： En-Feng Hsu ,  Chi-Chieh Liao

IPC: H01L27/146

CPC classification number: H01L27/14649 ,  H01L27/1462 ,  H01L27/14621 ,  H01L27/14625 ,  H01L27/14645 ,  H01L27/14647

Abstract: An optical sensor includes an image sensor, a proximity sensor and a visible light sensor. The image sensor includes a first pixel and a second pixel. The first pixel is coated with a first optical film for blocking light whose wavelength is outside a first predetermined range and a second optical film for blocking light whose wavelength is outside a second predetermined range. The proximity sensor generates an IR signal according to a first exposure value. The visible light sensing unit generates a visible light signal according to the difference between the first exposure and a second exposure value or according to a ratio of the first exposure value to the second exposure value. The first exposure value represents an incident light quantity which is absorbed by the first pixel. The second exposure value represents an incident light quantity which is absorbed by the second pixel.

Abstract translation: 光学传感器包括图像传感器，接近传感器和可见光传感器。 图像传感器包括第一像素和第二像素。 第一像素被涂覆有用于阻挡波长在第一预定范围之外的光的第一光学膜和用于阻挡波长在第二预定范围之外的光的第二光学膜。 接近传感器根据第一曝光值产生IR信号。 可见光感测单元根据第一曝光和第二曝光值之间的差值或根据第一曝光值与第二曝光值的比率产生可见光信号。 第一曝光值表示被第一像素吸收的入射光量。 第二曝光值表示被第二像素吸收的入射光量。

公开(公告)号：US20130314691A1

公开(公告)日：2013-11-28

申请号：US13959758

申请日：2013-08-06

Applicant: PixArt Imaging Inc.

Inventor： En-Feng Hsu ,  Chi-Chieh Liao ,  Ming-Tsan Kao

IPC: G01C3/08

CPC classification number: G01C3/08 ,  G01C3/10 ,  G01S7/4918 ,  G01S17/48

Abstract: A light source transmits detecting light toward an object. The object reflects the detecting light and forms a reflected light. A sensor is used for sensing the reflected light. Then, an exposure control unit coupled to the sensor performs luminance convergence on the reflected light according to luminance of the reflected light sensed by the sensor. And a distance measurement device coupled to the sensor detects a distance between the object and the light source and/or the sensor according to an image position of the reflected light on the sensor.

Abstract translation: 光源向物体传输检测光。 物体反射检测光并形成反射光。 传感器用于感测反射光。 然后，耦合到传感器的曝光控制单元根据由传感器感测的反射光的亮度对反射光进行亮度会聚。 并且耦合到传感器的距离测量装置根据传感器上的反射光的图像位置来检测物体与光源和/或传感器之间的距离。

公开(公告)号：US11674862B2

公开(公告)日：2023-06-13

申请号：US17233806

申请日：2021-04-19

Applicant: PIXART IMAGING INC.

Inventor： Che-Chia Hsu ,  Yu-Han Chen ,  Chi-Chieh Liao

IPC: G01L9/12 ,  G01L9/00

CPC classification number: G01L9/12 ,  G01L9/0005

Abstract: A pressure sensing unit, a capacitive hybrid sensor device, and an input apparatus using the same are provided. The pressure sensing unit for detecting pressing events includes a pressure sensing pad group and a floating conductive element. The pressure sensing pad group includes a first pressure sensing pad, a second pressure sensing pad, and a ground pad that are spaced apart from one another. The first and second pressure sensing pads are electrically shielded from each other by the ground pad. One among the floating conductive element and the pressure sensing pad group is configured to be movable in a movement direction relative to another one among the floating conductive element and the pressure sensing pad group. The floating conductive element overlaps with the pressure sensing pad group in the movement direction. Therefore, a signal-to-noise ratio can be increased and an erroneous detection can be prevented.

公开(公告)号：US20220120600A1

公开(公告)日：2022-04-21

申请号：US17071986

申请日：2020-10-15

Applicant: PixArt Imaging Inc.

Inventor： Feng-Chi Liu ,  Chi-Chieh Liao ,  Guo-Zhen Wang ,  Hung-Ching Lai

IPC: G01F23/292 ,  G01F23/00

Abstract: An optical detection device of detecting a target container includes a linear light source, an optical sensor array and a processor. The linear light source is adapted to project a long strip illumination beam onto the target container. The optical sensor array includes a plurality of sensing units arranged as a long strip adapted to receive a long strip detection beam reflected from the target container. The processor is electrically connected to the optical sensor array. The processor is adapted to analyze intensity distribution of the plurality of sensing units to acquire a relative distance between the optical sensor array and a rim of the target container.

公开(公告)号：US10578507B2

公开(公告)日：2020-03-03

申请号：US15482815

申请日：2017-04-09

Applicant: PixArt Imaging Inc.

Inventor： Yu-Han Chen ,  Chih-Wei Huang ,  Chi-Chieh Liao ,  Wei-Chung Wang

IPC: G01L9/12 ,  G01L25/00 ,  G01L1/14 ,  G06F3/041 ,  G06F3/044

Abstract: A pressure measuring method, applied to a pressure measuring apparatus, comprising: measuring a first pressure sensing value of the pressure measuring apparatus, which corresponds to a first pressure in a test mode; measuring a second pressure sensing value of the pressure measuring apparatus, which corresponds to a second pressure in the test mode; generating a first corresponding function according to the first pressure, the second pressure, the first pressure sensing value and the second pressure sensing value; sensing a third pressure sensing value via the pressure measuring apparatus in a normal mode; and generating a third pressure according to the third pressure sensing value via the first corresponding function; wherein the pressure measuring apparatus operates at a first scan frequency. By this way, the pressure sensing value can be calibrated, to solve the issue that the pressure sensing values are affected by scan frequencies.

公开(公告)号：US09996169B2

公开(公告)日：2018-06-12

申请号：US14725211

申请日：2015-05-29

Applicant: PIXART IMAGING INC.

Inventor： Masatoshi Yamai ,  Chi-Chieh Liao ,  Hung-Yu Lai

IPC: G06F3/0338

CPC classification number: G06F3/0338

Abstract: There is provided a capacitive joystick device including a substrate, a fixed plate, a movable member, a plurality of elastic elements, a cone and an operation stick. The substrate includes a ground region and a capacitance sensing region. The fixed plate includes a first opening. The movable member includes a second opening. The elastic elements are symmetrically disposed between the fixed plate and the movable member. The cone is disposed between the movable member and the substrate, and includes a base, a vertex and a lateral surface. The base presses against the movable member. The vertex is disposed on the ground region of the substrate. The lateral surface is aligned with the capacitance sensing region of the substrate. The operation stick extends from the base of the cone and passes through the first opening and the second opening.