公开(公告)号：US11734912B2

公开(公告)日：2023-08-22

申请号：US17308983

申请日：2021-05-05

Applicant: PixArt Imaging Inc.

Inventor： Keng Yeen Lye ,  Kevin Len-Li Lim

IPC: G06V10/60 ,  G06F3/041 ,  G06F3/03 ,  G06V10/75 ,  G06F18/24 ,  G06F3/0354 ,  G06V10/764 ,  G06V10/98

CPC classification number: G06V10/60 ,  G06F3/0321 ,  G06F3/03543 ,  G06F3/0418 ,  G06F18/24 ,  G06V10/751 ,  G06V10/764 ,  G06V10/993 ,  G06F3/0317

Abstract: A computer readable recording medium storing at least one program, wherein an image quality improvement method is performed when the program is executed. The image quality improvement method comprising: (a) classifying data units of a target image to normal data units and abnormal data units based on relations between brightness values of the data units and a classification parameter, wherein the classification parameter is related with an image quality of the target image or the brightness values of the data units; and (b) adjusting the brightness values of the abnormal data units based on an adjusting parameter to generate adjusted brightness values, such that differences between the adjusted brightness values and the brightness values of the normal data units are reduced. An optical navigation method using the image quality improvement method is also disclosed.

公开(公告)号：US11582413B2

公开(公告)日：2023-02-14

申请号：US17408733

申请日：2021-08-23

Applicant: PixArt Imaging Inc.

Inventor： Joon-Chok Lee ,  Kevin Len-Li Lim

IPC: H04N5/365 ,  G06F3/0354 ,  G06T5/20

Abstract: There is provided an optical navigation device including an image sensor and a processing unit. The image sensor outputs successive image frames. The processing unit calculates a contamination level and a motion signal based on filtered image frames, and determines whether to update a fixed pattern noise (FPN) stored in a frame buffer according to a level of FPN subtraction, the calculated contamination level and the calculated motion signal to optimize the update of the fixed pattern noise.

公开(公告)号：US11327550B2

公开(公告)日：2022-05-10

申请号：US16991255

申请日：2020-08-12

Applicant: PixArt Imaging Inc.

Inventor： Joon-Chok Lee ,  Kevin Len-Li Lim

IPC: G06F1/3234 ,  H04N5/235 ,  H04N5/3745 ,  H04N5/357 ,  G06F3/0354 ,  G06F3/038 ,  G06F3/03

Abstract: There is provided a navigation device including an image sensor, an analog to digital converter and a processor. The image sensor is used to output an analog image using an exposure time. The analog to digital converter is used to convert the analog image to a digital image using a resolution. The processor is used to identify an image quality of the digital image, and adjust at least one of the exposure time of the image sensor and the resolution of the analog to digital converter according to the image quality thereby adjusting the operation power by changing data length actually processed by the processor.

公开(公告)号：US11301065B2

公开(公告)日：2022-04-12

申请号：US16804514

申请日：2020-02-28

Applicant: PIXART IMAGING INC.

Inventor： Keng-Yeen Lye ,  Kevin Len-Li Lim

IPC: G06F3/038 ,  G06F3/0354 ,  G01C21/20 ,  G06F1/04 ,  H03K21/08

Abstract: There is provided a frame rate adjusting method of a navigation device including: counting a frame period using a clock of a local oscillator of the navigation device; counting a polling period using the same clock; calculating a difference between the frame period and the polling period; adjusting a frame rate of the navigation device when the difference is smaller than a predetermined margin.

公开(公告)号：US11128825B2

公开(公告)日：2021-09-21

申请号：US16459626

申请日：2019-07-02

Applicant: PixArt Imaging Inc.

Inventor： Joon-Chok Lee ,  Kevin Len-Li Lim

IPC: H04N5/365 ,  G06F3/0354 ,  G06T5/20

Abstract: There is provided an optical navigation device including an image sensor and a processing unit. The image sensor outputs successive image frames. The processing unit calculates a contamination level and a motion signal based on filtered image frames, and determines whether to update a fixed pattern noise (FPN) stored in a frame buffer according to a level of FPN subtraction, the calculated contamination level and the calculated motion signal to optimize the update of the fixed pattern noise.

公开(公告)号：US10969883B2

公开(公告)日：2021-04-06

申请号：US16594329

申请日：2019-10-07

Applicant: PixArt Imaging Inc.

Inventor： Zi-Hao Tan ,  Kevin Len-Li Lim

IPC: G06F3/038 ,  G06F3/0354 ,  G06F3/03 ,  G06T7/246

Abstract: An optical navigation device including an image sensor, a navigation engine, a smoothing engine and an adjusting interface. The image sensor generates image frames. The navigation engine calculates displacement according to the image frames. The smoothing engine changes a smoothing level for smoothing the calculated displacement according to a trigger signal sent from the adjusting interface.

公开(公告)号：US10852848B2

公开(公告)日：2020-12-01

申请号：US16743614

申请日：2020-01-15

Applicant: PixArt Imaging Inc.

Inventor： Joon-Chok Lee ,  Kevin Len-Li Lim

IPC: G06F3/0354 ,  G06F3/044 ,  G06F3/0362

Abstract: There is provided an interactive system including a mouse device having a mouse case, a detection switch and a control chip. The mouse case is held by a user and operated on a work surface. The detection switch is arranged on the mouse case and configured to output a detected signal according to user operation. The control chip is electrically coupled to the detection switch and configured to enable or disable an angle snapping function according to the detected signal.

公开(公告)号：US10324545B2

公开(公告)日：2019-06-18

申请号：US15709666

申请日：2017-09-20

Applicant: PixArt Imaging Inc.

Inventor： Zi-Hao Tan ,  Kevin Len-Li Lim

IPC: G06F3/038 ,  G06F3/03 ,  G06T7/246 ,  G06F3/0354

Abstract: An optical navigation device including an image sensor, a navigation engine, a smoothing engine and an adjusting interface. The image sensor generates image frames. The navigation engine calculates displacement according to the image frames. The smoothing engine changes a smoothing level for smoothing the calculated displacement according to a trigger signal sent from the adjusting interface.

公开(公告)号：US12293031B2

公开(公告)日：2025-05-06

申请号：US18371463

申请日：2023-09-22

Applicant: PixArt Imaging Inc.

Inventor： Zi Hao Tan ,  Kevin Len-Li Lim

IPC: G06F3/038 ,  G06F3/0354

Abstract: An image sensing system control method, applied to an image sensing system comprising an image sensor and a control circuit. The method comprises: (a) defining a first reporting frame sensed at a first reporting frame time and a second reporting frame sensed at a second reporting frame time, wherein the image sensor reports motions computed according to the first reporting frame after the first reporting frame time, and reports motions computed according to the second reporting frame after the second reporting frame time; and (b) adjusting a first reporting time interval between the first reporting frame time and the second reporting frame time, to adjust the second reporting frame time to meet a second target time. The second reporting frame time is after the first reporting frame time.

公开(公告)号：US20250132529A1

公开(公告)日：2025-04-24

申请号：US19010152

申请日：2025-01-05

Applicant: PixArt Imaging Inc.

Inventor： Joon Chok LEE ,  Kevin Len-Li Lim

IPC: H01R24/28 ,  B60L53/16 ,  B60L53/18 ,  H01R13/44 ,  H01R13/621 ,  H01R13/66 ,  H01R24/20 ,  H01R107/00 ,  H02J7/00

Abstract: A method of identifying a false alarm of an optical motion sensor including a plurality of pixel units, includes: receiving pixel values of a testing set of pixel units selected from the plurality of pixel units, and a number of pixels of the testing set is smaller than a number of the plurality of pixel units; and performing a background adjustment operation according to the pixel values of the testing set of pixel units.