公开(公告)号：US20230161422A1

公开(公告)日：2023-05-25

申请号：US17535662

申请日：2021-11-25

Applicant: PixArt Imaging Inc.

Inventor： Sai Mun LEE ,  Hun Kwang LEE ,  Yee Loong CHIN

IPC: G06F3/03 ,  G06F3/0354

CPC classification number: G06F3/0317 ,  G06F3/03541

Abstract: An optical navigation device includes a casing, a circuit board, an illumination light source and an optical receiver. The casing is movably located above a navigation surface. The circuit board is disposed inside the casing. The illumination light source is disposed on the circuit board and adapted to provide an illumination channel toward the navigation surface. The optical receiver is disposed adjacent to the illumination light source. An imaging channel of the optical receiver is substantially parallel to a planar normal vector of the navigation surface, and the optical receiver is adapted to identify features on the navigation surface within a range crossed by the imaging channel and the illumination channel for providing navigation information.

公开(公告)号：US20230152085A1

公开(公告)日：2023-05-18

申请号：US18097466

申请日：2023-01-16

Applicant: PixArt Imaging Inc.

Inventor： KEEN-HUN LEONG ,  TONG-SEN LIEW ,  CHING-GEAK CHAN

IPC: G01B11/04 ,  G01B21/04 ,  G06F3/03

CPC classification number: G01B11/046 ,  G01B21/047 ,  G06F3/0317

Abstract: There is provided an optical positioning system including a detected surface, an optical sensor, a register and a processor. The detected surface has interleaved bright regions and dark regions arranged in a transverse direction. The optical sensor captures an image frame of the detected surface within a field of view thereof and using a shutter time, wherein the detected surface and the optical sensor have a relative movement in the transverse direction. The register records a type of a last passed edge. The processor calculates a first position using a first algorithm upon the recorded last passed edge being a bright-to-dark edge and the field of view being aligned with one of the dark regions, and calculates a second position using a second algorithm, different from the first algorithm, upon the recorded last passed edge being a dark-to-bright edge and the field of view being aligned with the same one of the dark regions.

公开(公告)号：US11644554B2

公开(公告)日：2023-05-09

申请号：US16936777

申请日：2020-07-23

Applicant: PixArt Imaging Inc.

Inventor： Tso-Sheng Tsai ,  Yueh-Lin Chung ,  Shin-Lin Wang

IPC: G01S7/48 ,  G01S7/497 ,  G01S17/10 ,  G01S7/481 ,  G01S7/4865

CPC classification number: G01S7/497 ,  G01S7/4814 ,  G01S7/4816 ,  G01S7/4865 ,  G01S17/10

Abstract: There is provided a time of flight sensor including a light source, a first pixel, a second pixel and a processor. The first pixel generates a first output signal without receiving reflected light from an external object illuminated by the light source. The second pixel generates a second output signal by receiving the reflected light from the external object illuminated by the light source. The processor calculates deviation compensation and deviation correction associated with temperature variation according to the first output signal to accordingly calibrate a distance calculated according to the second output signal.

公开(公告)号：US20230139484A1

公开(公告)日：2023-05-04

申请号：US18088798

申请日：2022-12-27

Applicant: PixArt Imaging Inc.

Inventor： GUO-ZHEN WANG

IPC: B25J9/16 ,  A47L11/40 ,  B25J11/00 ,  A47L9/28

Abstract: There is provided an electronic device including a light source module, an image sensor and a processor. The light source module projects a first pattern and a second pattern toward a moving direction. The image sensor captures an image of the first pattern and an image of the second pattern. The processor calculates one-dimensional depth information according to the image of the first pattern and calculates two-dimensional depth information according to the image of the second pattern.

公开(公告)号：US11632502B2

公开(公告)日：2023-04-18

申请号：US17471260

申请日：2021-09-10

Applicant: PIXART IMAGING INC.

Inventor： En-Feng Hsu

IPC: H04N5/235

Abstract: There is provided an optical sensor that acquires a first image frame corresponding to a first flicker period and acquires a second image frame corresponding to a second flicker period. The optical sensor adds the first image frame to the second image frame to generate a sum of image frames for the motion detection. Or, the optical sensor respectively adds pixel data of every two pixels in neighboring rows of the first image frame and the second image frame to generate a low-resolution image frame for the motion detection.

公开(公告)号：US11615684B2

公开(公告)日：2023-03-28

申请号：US17320222

申请日：2021-05-14

Applicant: PixArt Imaging Inc.

Inventor： Cheng-Nan Tsai ,  Guo-Zhen Wang ,  Ching-Kun Chen ,  Yen-Chang Chu ,  Chih-Ming Sun

IPC: G08B17/107

Abstract: There is provided a smoke detector including a light source, a reflective surface, a light sensor and a processor. The light sensor receives reflected light when the light source emits light toward the reflective surface, and generates a reference detection signal when there is no smoke. The processor receives the detection signal from the light sensor, and automatically selects a set of predetermined condition thresholds according to a profile of the detection signal to be compared with the detection signal thereby determining whether to generate an alarm according to the comparison result.

公开(公告)号：US11614322B2

公开(公告)日：2023-03-28

申请号：US16881437

申请日：2020-05-22

Applicant: PixArt Imaging Inc.

Inventor： Wen-Han Yao ,  Wen-Cheng Yen ,  Han-Chang Lin

IPC: H04N5/235 ,  G01B11/14 ,  G06V10/40 ,  G06V10/60 ,  G06V10/46

Abstract: There is provided an imaging system including a camera and a control host. The camera identifies ambient light intensity and performs trigger event detection in a low power mode. When the camera detects a trigger event in the low power mode, the control host is woken up. The camera also determines an exposure mode according the ambient light intensity and informs the exposure mode to the control host such that an operating mode of the control host after being woken up matches the exposure mode of the camera.

公开(公告)号：US20230093565A1

公开(公告)日：2023-03-23

申请号：US18070680

申请日：2022-11-29

Applicant: PixArt Imaging Inc.

Inventor： WEN-HAN YAO ,  WEN-CHENG YEN ,  HAN-CHANG LIN

IPC: G01B11/14 ,  H04N5/235 ,  G06V10/40 ,  G06V10/60

Abstract: There is provided an imaging system including a camera and a control host. The camera identifies ambient light intensity and performs trigger event detection in a low power mode. When the camera detects a trigger event in the low power mode, the control host is woken up. The camera also determines an exposure mode according the ambient light intensity and informs the exposure mode to the control host such that an operating mode of the control host after being woken up matches the exposure mode of the camera.

公开(公告)号：US11609642B2

公开(公告)日：2023-03-21

申请号：US17862420

申请日：2022-07-12

Applicant: PixArt Imaging Inc.

Inventor： Feng-Chi Liu ,  Ching-Lin Chung

IPC: G06F3/03 ,  G06F3/0362 ,  G06F3/02 ,  G06F3/0354 ,  G04C3/00 ,  G04G21/00 ,  E05B37/00 ,  G06F1/16

Abstract: A method of an optical sensor apparatus which is to be used with a controlling device arranged for controlling an object having a long shape and flexible form of a material, includes: using a light emitting circuit to generate and output a light ray to a surface of a portion of the object; sensing the light ray reflected from the surface for multiple times to generate multiple images; detecting at least one motion image in the generated multiple images; and, determining a motion, an offset, or a rotation angle of the object, which is controlled by the thread controlling device, according to the detected at least one motion image.

公开(公告)号：US11599221B2

公开(公告)日：2023-03-07

申请号：US16991277

申请日：2020-08-12

Applicant: PixArt Imaging Inc.

Inventor： Sung-Han Wu

IPC: G06F3/041 ,  G06F3/044

Abstract: There is provided a capacitive touch device including a touch panel and a control chip. The touch panel includes a detection electrode configured to form a self-capacitor. The control chip includes an emulation circuit and a subtraction circuit. The emulation circuit is configured to output a reference signal. The subtraction circuit is coupled to the emulation circuit and the detection electrode, subtracts the reference signal outputted by the emulation circuit from a detected signal outputted by the detection electrode to output a differential detected signal, and identifies a touch event according to an amplified differential detected signal so as to improve the touch sensitivity.