Patents Assigned to Pixart Imaging, Inc.
  • Vehicle system with no-control operation
    Patent number: 11741630
    Abstract: There is provided a vehicle system including a sensing unit, a processing unit, a control unit and a display unit. The sensing unit is configured to capture an image frame containing an eyeball image from a predetermined distance. The processing unit is configured to calculate a pupil position of the eyeball image in the image frame and generate a drive signal corresponding to the pupil position. The control unit is configured to trigger a vehicle device associated with the pupil position according to the drive signal. The display unit is configured to show information of the vehicle device.
    Type: Grant
    Filed: March 4, 2022
    Date of Patent: August 29, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Chun-Wei Chen, Shih-Wei Kuo
  • Image quality improving method, optical navigation device control method, and optical navigation device using the methods
    Patent number: 11740709
    Abstract: A computer readable recording medium comprising at least one program stored therein. An image quality improving method is performed when the program is executed. The image quality improving method comprises: (a) computing brightness contrast information of an original image captured by an image sensor of an optical navigation device; (b) computing a brightness variation level of the original image; and (c) improving an image quality of the original image based on the brightness contrast information and the brightness variation level.
    Type: Grant
    Filed: June 10, 2021
    Date of Patent: August 29, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Bo-Yi Chang, Yao-Hsuan Lin
  • Optical sensor devices and method capable of calibrating clock signal by itself when receiving one or more transmissions of specific communication signal from monitoring system
    Patent number: 11743025
    Abstract: A method of an optical sensor device includes: using an oscillator circuit to generate a clock signal; and generating monitoring frames according to the clock signal; wherein the clock signal is calibrated in response to at least one of: a first communication signal, transmitted for multiple times from a monitoring system externally coupled to the optical sensor device, is received by the optical sensor device; a data length of the first communication signal transmitted for only one time from the monitoring system externally coupled to the optical sensor device; and, a data length of an encoded data portion of the first communication signal transmitted for only one time.
    Type: Grant
    Filed: March 15, 2022
    Date of Patent: August 29, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Chih-Huan Wu, Wen-Han Yao, Ren-Hau Gu
  • Pointing device and method capable of correcting its USB state by monitoring voltage/state of USB communication interface
    Patent number: 11741023
    Abstract: A method of a pointing device which is used to be coupled to a host system through a universal serial bus (USB) communication interface includes: providing a USB driver device to communicate with the host system via the USB communication interface; monitoring a specific voltage change or a specific data transmission state of the USB communication interface to generate a monitoring result; and correcting a USB state of the USB driver device when the monitoring result indicates that a undefined or abnormal behavior of the host system occurs.
    Type: Grant
    Filed: February 9, 2022
    Date of Patent: August 29, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Ching-Chih Chen, Jr-Yi Li
  • Sensor device with sensing array having sensing pixels and self-powered pixels
    Patent number: 11740684
    Abstract: A sensor device includes an image sensing array, a frame buffer, a first read line, a second read line and an energy accumulator. The image sensing array is configured to sense reflected light from a working surface and includes a plurality of sensing pixels and a plurality of self-powered pixels. The sensing pixels respectively output image data according to the sensed reflected light. The self-powered pixels respectively output photocurrent according to the sensed reflected light. The first read line is coupled between the sensing pixels and the frame buffer. The second read line is coupled between the self-powered pixels and the frame buffer. The energy accumulator stores electrical energy of the photocurrent via a charge path between the self-powered pixels and the energy accumulator.
    Type: Grant
    Filed: July 20, 2021
    Date of Patent: August 29, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Guo-Zhen Wang
  • Image recognition method and system based on deep learning
    Patent number: 11741708
    Abstract: An image recognition method and system based on deep learning are provided. The image recognition system includes a first recognizing engine, at least one second recognizing engine and a processing circuit. The second recognizing engine is activated to recognize a testing image when the first recognizing engine is recognizing the testing image. The processing circuit determines whether to interrupt the first recognizing engine recognizing the testing image according to a result outputted by the second recognizing engine after the second recognizing engine completes recognition of the testing image.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: August 29, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Guo-Zhen Wang
  • Method, node for processing messages within an IOT network and network packet thereof
    Patent number: 11743691
    Abstract: A method and node for processing messages within an Internet of Things (IoT) network and network packet thereof are provided. Multiple fields of a header of a network packet broadcasted over the IoT network are referred to in the method. When a node receives a network packet broadcasted over the IOT network, it checks if the node's ID is recorded in an ID field of the network packet. The node ID is added to the network packet if the network packet does not record the node ID, and the network packet is then broadcasted to the IOT network; otherwise, the network packet is not broadcasted if the node ID has been recorded in the ID field. The node also performs a function indicated in a function field of the network packet when the node ID is not recorded in the network packet.
    Type: Grant
    Filed: February 22, 2022
    Date of Patent: August 29, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Yi-Hsien Ko
  • Anti-pollution optical encoder
    Patent number: 11740108
    Abstract: There is provided an optical encoder including an encoding medium, multiple photodiodes and a signal processing circuit. The encoding medium includes an index track. The index track includes a first index pattern and a second index pattern. The multiple photodiodes include a first index photodiode, a second index photodiode and a reference index photodiode for receiving modulated light from the first index pattern and the second index pattern. When the first index photodiode is aligned with the first index pattern and the second index photodiode is aligned with the second index pattern, the signal processing circuit outputs a triggering signal.
    Type: Grant
    Filed: November 25, 2020
    Date of Patent: August 29, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan-Choong Shim, Gim-Eng Chew, Priscilla Tze-Wei Goh, Meng-Yee Lim
  • Apparatus having gesture sensor
    Patent number: 11740703
    Abstract: An apparatus having a gesture sensor is provided. The gesture sensor includes an image sensing unit and a processing unit. The image sensing unit can capture at least a gesture image of user. The processing unit is electrically connected to the image sensing unit. The processing unit can send at least a control command according to the gesture image to operate the apparatus.
    Type: Grant
    Filed: January 19, 2021
    Date of Patent: August 29, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Chung-Yuo Wu, Yi-Hsien Ko, Nientse Chen
  • OPTICAL DETECTION DEVICE
    Publication number: 20230266297
    Abstract: An optical detection device is applied to an organism and includes a light emitting module, an optical detection module and an operation processor. The light emitting module includes a plurality of light emitters arranged along a first direction. The optical detection module includes a plurality of optical sensors arranged along a second direction and symmetrically relative to the light emitting module. The second direction is substantially different from the first direction. The optical sensors are substantially placed more outward from a center of the optical detection device than the light emitters. The operation processor is electrically connected to the optical detection module. The operation processor is adapted to analyze signal variation in the plurality of light emitters acquired by each of the plurality of optical sensors for determining a physiological feature of the organism.
    Type: Application
    Filed: February 23, 2022
    Publication date: August 24, 2023
    Applicant: PixArt Imaging Inc.
    Inventors: Yung-Chang Lin, Che-Yen Kung, Jian-Cheng Liao, Hsiu-Ling Yeh
  • Computer readable recording medium which can be used to perform image quality improvement method and optical navigation method
    Patent number: 11734912
    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.
    Type: Grant
    Filed: May 5, 2021
    Date of Patent: August 22, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Keng Yeen Lye, Kevin Len-Li Lim
  • Force sensor and manufacturing method thereof
    Patent number: 11733109
    Abstract: There is provided a force sensor including a substrate and a polymer material layer. The substrate has a circuit layout that includes a first electrode and a second electrode configured to form a capacitor therebetween. The polymer material layer covers at least on a space between the first electrode and the second electrode, and is used to change capacitance of the capacitor while being pressed.
    Type: Grant
    Filed: December 22, 2020
    Date of Patent: August 22, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Chih-Ming Sun
  • Single layer capacitive touch force sensor
    Patent number: 11726599
    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.
    Type: Grant
    Filed: November 16, 2022
    Date of Patent: August 15, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Chi-Chieh Liao
  • Dynamic moving averaging method to suppress mouse stationary jitter
    Patent number: 11726586
    Abstract: A method for reducing jitter of a mouse when in a stationary condition, including: receiving a plurality of raw delta; comparing a movement of the mouse with a predetermined threshold; and when the movement is less than the predetermined threshold, entering a dynamic downshift mode. Entering the dynamic downshift mode includes: storing raw delta into a multi-tap buffer; when the multi-tap buffer is not full, outputting the raw delta as reported delta; and when the multi-tap buffer is full, calculating an average of the total raw delta stored in the multi-tap buffer, and outputting the average delta as reported delta.
    Type: Grant
    Filed: July 28, 2022
    Date of Patent: August 15, 2023
    Assignee: PixArt Imaging Inc.
    Inventor: Chun Heap Leow
  • POINTING DEVICE AND METHOD CAPABLE OF CORRECTING ITS USB STATE BY MONITORING VOLTAGE/STATE OF USB COMMUNICATION INTERFACE
    Publication number: 20230251978
    Abstract: A method of a pointing device which is used to be coupled to a host system through a universal serial bus (USB) communication interface includes: providing a USB driver device to communicate with the host system via the USB communication interface; monitoring a specific voltage change or a specific data transmission state of the USB communication interface to generate a monitoring result; and correcting a USB state of the USB driver device when the monitoring result indicates that a undefined or abnormal behavior of the host system occurs.
    Type: Application
    Filed: February 9, 2022
    Publication date: August 10, 2023
    Applicant: PixArt Imaging Inc.
    Inventors: Ching-Chih Chen, Jr-Yi Li
  • ELECTRONIC DEVICE AND METHOD CAPABLE OF PREDICTING AND GENERATING COMPENSATION CHARGE AMOUNT(S) IN RESPONSE TO SWITCHING OF CDAC
    Publication number: 20230253978
    Abstract: A method of an electronic device includes: providing a capacitive digital-to-analog converter having a reference voltage input; providing a reference voltage providing circuit to generate a reference voltage to the reference voltage input of the capacitive digital-to-analog converter; and, generating a compensation signal into the reference voltage input of the capacitive digital-to-analog converter in response to at least one switching of at least one capacitor in a switchable capacitor network of the capacitive digital-to-analog converter.
    Type: Application
    Filed: February 7, 2022
    Publication date: August 10, 2023
    Applicant: PixArt Imaging Inc.
    Inventor: Shiue-Shin Liu
  • SMOKE DETECTION DEVICE WITH PREFERRED DETECTION ACCURACY
    Publication number: 20230252871
    Abstract: A smoke detection device includes a housing, a smoke collector, an optical detector and a cover plate. The housing has a piercing hole. The smoker collector has a smoke hole, and position of the smoke hole is close to position of the piercing hole. The optical detector is disposed inside the smoke collector and adapted to detect gaseous concentration inside the smoke collector. The cover plate is disposed between the housing and the smoke collector, and used to set a channel from the piercing hole to the smoke hole, so that gaseous matter flows from outside the smoke detection device into the smoke collector through the piercing hole and the smoke hole.
    Type: Application
    Filed: May 11, 2022
    Publication date: August 10, 2023
    Applicant: PixArt Imaging Inc.
    Inventors: Yen-Chang Chu, Yen-Po Chen, Chih-Ming Sun, Cheng-Nan Tsai, Ching-Kun Chen
  • Wearable infrared temperature sensing device
    Patent number: 11719579
    Abstract: A wearable device includes a case and a far infrared temperature sensing device. The case has a first opening. The far infrared temperature sensing device is disposed inside the case of the wearable device. The far infrared temperature sensing device includes an assembly structure, a sensor chip, a filter structure, and a metal shielding structure. The assembly structure has an accommodating space and a top opening. The sensor chip is disposed in the accommodating space of the assembly structure. The filter structure is disposed above the sensor chip. The metal shielding structure is disposed above the sensor chip, and has a second opening to expose the filter structure. The first and second openings are communicated to cooperatively define a through hole.
    Type: Grant
    Filed: January 19, 2022
    Date of Patent: August 8, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Chih-Ming Sun, Ming-Han Tsai, Cheng-Nan Tsai
  • Heart rate detection device and physiological detection device
    Patent number: 11717228
    Abstract: There is provided a heart rate detection device including a sensing unit for sensing emergent light from subcutaneous tissues illuminated by a single light source of multiple light colors to output multiple light detection signals associated with multiple wavelengths. The heart rate detection device further includes a processor uses the multiple light detection signals associated with the multiple wavelengths to cancel motion artifact to obtain a clean heart rate signal.
    Type: Grant
    Filed: November 10, 2021
    Date of Patent: August 8, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Ren-Hau Gu, Chih-Hsin Lin
  • Liquid level detection system
    Patent number: 11715226
    Abstract: A liquid level detection system of detecting a target container includes a main body, an optical sensor, a fan and an operational processor. The main body has a supporting platform whereon the target container is disposed. The optical sensor is disposed above the supporting platform and adapted to output a detection image containing the target container. The fan is disposed on the main body and faces the supporting platform. The operational processor is electrically connected to the optical sensor, and adapted to analyze the detection image generated within an operation period of the fan and further to acquire an effective feature of the target container inside the detection image.
    Type: Grant
    Filed: July 7, 2021
    Date of Patent: August 1, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Guo-Zhen Wang, Tse-En Peng