Patents Assigned to Pixart Imaging, Inc.
  • Publication number: 20240062576
    Abstract: An optical identification device includes a top cover, a circuit board, an optical detection module, an optical deviation component and an anti-reflection component. The circuit board is disposed under the top cover. The optical detection module is disposed on the circuit board, and the optical detection module includes a light emitter and a light receiver. The optical deviation component is disposed on the light emitter of the optical detection module and adapted to change a transmission direction of an optical signal emitted by the light emitter, so that the optical signal is projected onto the top cover in an inclined manner. The anti-reflection component is disposed on a surface of the top cover facing the optical detection module and adapted to increase a penetration rate of the optical signal projected onto the top cover.
    Type: Application
    Filed: August 19, 2022
    Publication date: February 22, 2024
    Applicant: PixArt Imaging Inc.
    Inventors: Yong-Nong Huang, Hui-Hsuan Chen
  • Publication number: 20240064416
    Abstract: An optical sensor, for sensing a sensing frame corresponding to a flicker period of ambient light, comprising: a pixel array, configured to perform N times of exposure operations via at least one pixel of the pixel array in N exposure time intervals to generate N sub-frames, wherein a summation of the N exposure time intervals equals to a sensing interval and the sensing interval is less than or identical to a first flicker period. The optical sensor adds the N sub-frames to generate a summing sub-frame. The sensing frame comprises the summing sub-frame. The adding operation can also be performed to digital signals generated from the sub-frames. The influences caused by the fluctuation of ambient light can be neutralized, since the frame or portion of the frame is sensed at least twice at different phases of a single flicked period. By this way, the conventional flicker issue can be improved.
    Type: Application
    Filed: August 16, 2022
    Publication date: February 22, 2024
    Applicant: PixArt Imaging Inc.
    Inventor: Chih-Huan Wu
  • Patent number: 11907440
    Abstract: A method of a navigation sensor circuit includes: monitoring at least one polling request signal sent from a microcontroller during a variable time interval, wherein the microcontroller is externally coupled to the navigation sensor circuit; calculating at least one polling rate of the microcontroller according to the at least one polling request signal; and dynamically adjusting a sensor frame rate of the navigation sensor circuit according the at least one polling rate, wherein an image sensor of the navigation sensor circuit operates and captures images to generate and output displacement data based on the sensor frame rate.
    Type: Grant
    Filed: January 10, 2022
    Date of Patent: February 20, 2024
    Assignee: PixArt Imaging Inc.
    Inventors: Shang Chan Kong, Chun Heap Leow
  • Publication number: 20240054778
    Abstract: An object determining system, comprising: a processing circuit; a first stage object sensor, for generating a first stage object sensing result of an object; and a second stage object sensor, for generating a second stage object sensing result of the object if the processing circuit determines the object exists in a predetermined range based on the first stage object sensing result, wherein the processing circuit further determines an object kind of the object based on the second stage object sensing result; a line light source; and an area light source. The first stage object sensor generates the first stage object sensing result based on the line light. The second stage object sensor generates the second object detecting result based on the plane light. The first stage object sensor is a depth sensor or a thermal sensor. The second stage object sensor is an image sensor or a thermal sensor.
    Type: Application
    Filed: October 30, 2023
    Publication date: February 15, 2024
    Applicant: PixArt Imaging Inc.
    Inventor: Guo-Zhen Wang
  • Publication number: 20240054874
    Abstract: A smoke detector includes a substrate, an optical detection module, a base and a top cover. The substrate has a ring shape region surrounding a central detection region, and a first block structure of the central detection region is protruded from the substrate and higher than an upper surface of the ring shape region. The optical detection module is disposed inside the central detection region. The base is disposed on the substrate and around the optical detection module. The base has a second block structure. The top cover is connected to the base. A lateral wall of the top cover is partly overlapped with the second block structure to form a guiding channel. The optical detection module analyzes variation of scattering parameters resulted from gaseous matter entering the top cover through the guiding channel for determining concentration of the gaseous matter.
    Type: Application
    Filed: August 9, 2022
    Publication date: February 15, 2024
    Applicant: PixArt Imaging Inc.
    Inventors: Cheng-Nan Tsai, Yen-Chang Chu, Chih-Ming Sun
  • Publication number: 20240042615
    Abstract: An air ejection device, configured to eject air; a distance detecting circuit, configured to detect distances between an electronic device comprising the object determining system and at least one location of an object when the air ejection device ejects air to the object; and a determining circuit, configured to determine whether the object is a rigidity type object or a soft type object according to the variations.
    Type: Application
    Filed: October 19, 2023
    Publication date: February 8, 2024
    Applicant: PixArt Imaging Inc.
    Inventor: Guo-Zhen Wang
  • Patent number: 11893753
    Abstract: A security camera with a motion detection function, which comprises: an image sensor, configured to capture original images; a variation level computation circuit, configured to compute image variation levels of the original images; a long term computation circuit, configured to calculate a first average level for the image variation levels corresponding to M of the original images; a short term computation circuit, configured to calculate a second average level for the image variation levels corresponding to N of the original images, wherein M>N; and a motion determining circuit, configured to determine whether a motion of an object appears in a detection range of the image sensor according to a relation between the first average level and the second average level. By such security camera, the interference caused by noise or small object can be avoided. Accordingly, the motion detection of the security camera can be more accurate.
    Type: Grant
    Filed: July 24, 2020
    Date of Patent: February 6, 2024
    Assignee: PixArt Imaging Inc.
    Inventors: Kevin Len-Li Lim, Joon Chok Lee, Zi Hao Tan, Ching Geak Chan, Keen-Hun Leong
  • Publication number: 20240035900
    Abstract: An electronic device for estimating a temperature value of a thermistor includes a first signal port, an analog-to-digital converter, and a processing circuit. When the thermistor is coupled to the first signal port of the electronic device, the processing circuit is arranged to operate in a first switching condition to detect and generate a first voltage difference to the analog-to-digital converter, to operate in a second switching condition to detect and generate a second voltage difference to the analog-to-digital converter; and, the analog-to-digital converter is arranged to determine a resistance value of the thermistor based on the first voltage difference compared to the second voltage difference and to generate the estimated temperature value according to the determined resistance value.
    Type: Application
    Filed: July 28, 2022
    Publication date: February 1, 2024
    Applicant: PixArt Imaging Inc.
    Inventor: Yi-Hsuan Wu
  • Publication number: 20240032756
    Abstract: An electronic device, comprising: a first light source, configured to emit first light; a second light source, configured to emit second light; an optical sensor, configured to sense optical data generated according to reflected light of the second light or according to reflected light of the first light; and a control circuit, configured to analyze optical information of the optical data. If the control circuit determines variation of the optical information is larger than a variation threshold, the control circuit controls the first light source to be non-activated and the second light source to be activated.
    Type: Application
    Filed: October 10, 2023
    Publication date: February 1, 2024
    Applicant: PixArt Imaging Inc.
    Inventors: Muan Sian Ng, Wan Piang Lim, Hui-Hsuan Chen
  • Publication number: 20240036669
    Abstract: A method for reducing jitter of an optical sensor when in a stationary condition includes: receiving a plurality of raw delta; comparing a movement of the optical sensor with a predetermined threshold; and when the movement is less than the predetermined threshold, entering a dynamic downshift mode, including: storing raw delta into a buffer; when the buffer is not full, outputting the raw delta as reported delta; and when the buffer is full, calculating an average of the total raw delta stored in the buffer, and outputting the average delta as reported delta.
    Type: Application
    Filed: June 12, 2023
    Publication date: February 1, 2024
    Applicant: PixArt Imaging Inc.
    Inventor: Chun Heap Leow
  • Publication number: 20240036286
    Abstract: An optical lens, comprising: a first part, comprising a first surface; and a second part, comprising a second surface, a third surface and at least one concave portion. The first surface and the second surface are not parallel with the third surface, the first part protrudes from the third surface, and the first surface and the second surface are connected with the third surface.
    Type: Application
    Filed: October 11, 2023
    Publication date: February 1, 2024
    Applicant: PixArt Imaging Inc.
    Inventors: Wan Piang Lim, Sai Mun LEE
  • Patent number: 11888412
    Abstract: An active element (AE) layer includes: a substrate including an active body area and a protruding arm; an electrode, formed on the substrate and including an active region for sensing or actuation formed on the active body area of the substrate and a connection region formed on the protruding arm of the substrate, wherein the electrode includes a first indented line around the periphery of the active region, extending into the connection region and reaching two respective edges of the connection region, wherein the first indented line totally penetrates the electrode to make the respective edges electrically isolated; and an insulator layer formed on the electrode covering the active region and partially covering the connection region, wherein the insulator layer fills the indented line of the electrode.
    Type: Grant
    Filed: July 16, 2021
    Date of Patent: January 30, 2024
    Assignee: PixArt Imaging Inc.
    Inventors: Ville Topias Makinen, Roberto Tejera-Garcia
  • Patent number: 11886649
    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.
    Type: Grant
    Filed: November 25, 2021
    Date of Patent: January 30, 2024
    Assignee: PixArt Imaging Inc.
    Inventors: Sai Mun Lee, Hun Kwang Lee, Yee Loong Chin
  • Patent number: 11885828
    Abstract: There is provided an optical encoder including a phase shifter circuit and a multiple hysteresis comparators. The phase shifter circuit receives four input signals, and outputs multiple phase shifted signals based on the four input signals. Each of the multiple hysteresis comparators uses a changeable operation hysteresis level to compare a couple of phase shifted signals among the multiple phase shifted signals, wherein the changeable operation hysteresis level is determined corresponding to a signal frequency of the four input signals.
    Type: Grant
    Filed: January 24, 2022
    Date of Patent: January 30, 2024
    Assignee: PIXART IMAGING INC.
    Inventors: Chung-Min Thor, Kuan-Choong Shim
  • Publication number: 20240029261
    Abstract: A portrait image processing method, applying to a portrait image processing device, comprising: (a) acquiring a BVP (Blood Volume Pulse) signal of a user; (b) acquiring blood flow distribution of a specific portion of a user; (c) capturing an image of a specific portion of the user; and (d) adjusting the image of the specific portion according to the BVP signal and the blood flow distribution. A portrait image processing device, which comprises a camera and a processing circuit, is also disclosed. The processing circuit can acquire BVP signals from an image captured by the camera or from a PPG sensor.
    Type: Application
    Filed: July 20, 2022
    Publication date: January 25, 2024
    Applicant: PixArt Imaging Inc.
    Inventor: Yuan-Hsin Liao
  • Publication number: 20240027619
    Abstract: An image processing method includes: acquiring a plurality of sensed values based on detecting light; comparing sensed values of each row with a corresponding threshold value to select a plurality of selected sensed values from the plurality of sensed values; determining a location of a centroid according to the plurality of selected sensed values; and calculating a plurality of depth values with respect to a plurality of detecting points according to the location of the centroid and a plurality of depth information transformation functions respectively corresponding to the detecting points.
    Type: Application
    Filed: October 3, 2023
    Publication date: January 25, 2024
    Applicant: PixArt Imaging Inc.
    Inventor: Guo-Zhen Wang
  • Patent number: 11880205
    Abstract: An auto clean machine, comprising: a light source configured to emit light to illuminate at least one light region outside and in front of the auto clean machine; a first image sensing area, configured to sense a first brightness distribution of the light region; a second image sensing area below the first image sensing area, configured to sense a second brightness distribution of the light region; and a processor, configured to control movement of the auto clean machine according the first brightness distribution and the second brightness distribution. The processor generates a wall detection result based on the first brightness distribution of the light region, generates a cliff detection result based on the second brightness distribution of the light region, and controls the movement of the auto clean machine according to the wall detection result and the cliff detection result.
    Type: Grant
    Filed: October 19, 2022
    Date of Patent: January 23, 2024
    Assignee: PixArt Imaging Inc.
    Inventor: Guo-Zhen Wang
  • Publication number: 20240020850
    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.
    Type: Application
    Filed: July 15, 2022
    Publication date: January 18, 2024
    Applicant: PixArt Imaging Inc.
    Inventors: Joon Chok LEE, Kevin Len-Li LIM
  • Patent number: 11874174
    Abstract: A far infrared sensor package includes a package body and a plurality of far infrared sensor array integrated circuits. The plurality of far infrared sensor array integrated circuits are disposed on a same plane and inside the package body. Each of the far infrared sensor array integrated circuits includes a far infrared sensing element array of a same size.
    Type: Grant
    Filed: December 29, 2022
    Date of Patent: January 16, 2024
    Assignee: PixArt Imaging Inc.
    Inventors: Chih-Ming Sun, Sen-Huang Huang
  • Patent number: 11872014
    Abstract: An optical detection device for physiological characteristic identification includes a substrate, a light source and an optical receiver. The light source includes a plurality of first lighting units and a plurality of second lighting units symmetrically arranged on the substrate. The optical receiver is disposed on the substrate and adapted to analyze optical signals emitted by the light source for acquiring a result of the physiological characteristic identification.
    Type: Grant
    Filed: December 28, 2021
    Date of Patent: January 16, 2024
    Assignee: PixArt Imaging Inc.
    Inventor: Cheng-Nan Tsai