Patents Assigned to Pixart Imaging, Inc.
  • Camera having two exposure modes and imaging system using the same
    Patent number: 11614322
    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.
    Type: Grant
    Filed: May 22, 2020
    Date of Patent: March 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Wen-Han Yao, Wen-Cheng Yen, Han-Chang Lin
  • Electronic system with eye protection in response to user distance
    Patent number: 11616906
    Abstract: An electronic system including a display device, an image sensor, a face detection engine, an eye detection engine and an eye protection engine is provided. The image sensor captures an image. The face detection engine recognizes a user face in the image. The eye detection engine recognizes user eyes in the image. The eye protection engine turns off the display device when the user eyes are recognized in the image but the user face is not recognized in the image.
    Type: Grant
    Filed: November 1, 2021
    Date of Patent: March 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Han-Chang Lin, Guo-Zhen Wang, Nien-Tse Chen
  • Smoke detector
    Patent number: 11615684
    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.
    Type: Grant
    Filed: May 14, 2021
    Date of Patent: March 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Cheng-Nan Tsai, Guo-Zhen Wang, Ching-Kun Chen, Yen-Chang Chu, Chih-Ming Sun
  • Electrostatic actuator
    Patent number: 11616455
    Abstract: An actuator is configured to include a first substrate that has a first conductive surface, which may be or include a first conductive electrode layer. The actuator also includes a second substrate that has a second conductive surface, which may be or include a second conductive electrode layer. The first and second conductive surfaces face toward each other across a compression space between the first and second substrates. A group of elastic support nodules span the compression space and separate the first and second conductive surfaces. The compression space is less than fully filled with solid elastic material and is configured to be compressed by relative movement of the first and second conductive surfaces toward each other in response to a voltage difference between the first and second conductive surfaces.
    Type: Grant
    Filed: June 3, 2021
    Date of Patent: March 28, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Ville Mäkinen, Roberto Tejera-Garcia, Aki Salminen
  • Optical encoder with interpolation circuit
    Patent number: 11616503
    Abstract: There is provided an optical encoder including a phase shifter circuit, two multiplexers, two digital circuits and four comparators. The phase shifter circuit receives signals from an amplifier and outputs multiple phase shifted signals. Each of the two multiplexers receives a half of the multiple phase shifted signals and outputs two pairs of phase shifted signals, each pair having 180 degrees phase difference, respectively to two comparators connected thereto. Each of the two digital circuits controls the corresponding multiplexer to select the two pairs of phase shifted signals from the half of the multiple phase shifted signals.
    Type: Grant
    Filed: May 12, 2022
    Date of Patent: March 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Swee-Lin Thor, Gim-Eng Chew
  • Gesture recognition system employing thermal sensor and image sensor
    Patent number: 11615642
    Abstract: There is provided a recognition system adaptable to a portable device or a wearable device. The recognition system senses a body heat using a thermal sensor, and performs functions such as the living body recognition, image denoising and body temperature prompting according to detected results.
    Type: Grant
    Filed: September 9, 2021
    Date of Patent: March 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Nien-Tse Chen, Yi-Hsien Ko, Yen-Min Chang
  • Sensor circuit having identical capacitors to improve sensing efficiency of pixels and operating method thereof
    Patent number: 11614359
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: March 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu
  • Optical sensor apparatus and method capable of accurately determining motion/rotation of object having long shape and/or flexible form
    Patent number: 11609642
    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.
    Type: Grant
    Filed: July 12, 2022
    Date of Patent: March 21, 2023
    Assignee: PixArt Imaging Inc.
    Inventors: Feng-Chi Liu, Ching-Lin Chung
  • Optical processing apparatus and operating method of watch
    Patent number: 11609643
    Abstract: An optical processing apparatus and a light source luminance adjustment method adapted to detect a rotational displacement and a pressing state are provided. The optical processing apparatus includes a light source unit, a processing unit, and an image sensing unit, wherein the processing unit is electrically connected to the light source unit and the image sensing unit. The light source unit provides a beam of light. The processing unit defines a frame rate, defines a plurality of time instants within a time interval, and sets the light source unit to a luminance value at each of the time instants. A length of the time interval is shorter than the reciprocal of the frame rate. The luminance values are different and are within a range. The image sensing unit captures an image by an exposure time length at each of the time instants, wherein the exposure time lengths are the same.
    Type: Grant
    Filed: October 15, 2021
    Date of Patent: March 21, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Chung-Ting Yang, Ching-Lin Chung
  • Light sensor chip adaptable to low illumination environment
    Patent number: 11611710
    Abstract: There is provided an image processing device including a light sensor and a processor. The light sensor is used to detect light and output an image frame. The processor identifies intensity of ambient light according to an image parameter associated with the image frame. When the ambient light is identified to be strong enough, the processor performs an object identification directly using the image frame. When the ambient light is identified to be not enough, the processor firstly converts the image frame to a converted image using a machine learning model, and then performs the object identification using the converted image.
    Type: Grant
    Filed: March 7, 2022
    Date of Patent: March 21, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Guo-Zhen Wang
  • Count per inch calibration method and optical navigation device
    Patent number: 11609646
    Abstract: An optical navigation device, comprising: an optical sensor, configured to sense optical data; and a processing circuit, configured to compute motions of the optical navigation device based on the optical data, and configured to output the motions, wherein a first CPI is set to the processing circuit. The processing circuit receives a calibration command to calibrate the first CPI to a second CPI, wherein the second CPI is computed via following steps: (a) computing a real CPI corresponding to times of motions output by the processing circuit during a time interval that a relative displacement between the optical navigation device and a surface reaches a first predetermined distance; (b) computing a ratio between the real CPI and the first CPI or a difference between the real CPI and the first CPI; and (c) generating the second CPI based on the ratio or the difference.
    Type: Grant
    Filed: July 27, 2021
    Date of Patent: March 21, 2023
    Assignee: PixArt Imaging Inc.
    Inventor: Jr-Yi Li
  • Touch detection circuit with different charging and discharging currents and operating method thereof
    Patent number: 11611344
    Abstract: There is provided a touch detection circuit including a charging circuit, a discharging circuit, a counter and a processor. The charging circuit charges a detection capacitor within a charging interval using different currents. The discharging circuit discharges the detection capacitor within a discharging interval using different currents. The counter counts the charging interval and the discharging interval. The processor subtracts a baseline time from a counted charging time and a counted discharging time to cancel the noise interference.
    Type: Grant
    Filed: August 19, 2022
    Date of Patent: March 21, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Sung-Han Wu
  • Bar code, bar code reader and coffee machine
    Patent number: 11599736
    Abstract: A barcode, comprising: a code region, comprising at least bright point and a dark point, comprising code information; and a boundary region, formed as a closed shape surrounding the code region. A decoding direction of the code region is not relative to the boundary region. The code information is represented by at least one of: a color sequence, an intensity sequence and a relation between the bright point and the dark point. The present invention also provides a barcode processing system which can process the barcode to generate a control command, and provides a coffee machine using the barcode processing system. The barcode can be easily aligned by a closed boundary region, without using a frame buffer with a large size.
    Type: Grant
    Filed: November 3, 2021
    Date of Patent: March 7, 2023
    Assignee: PixArt Imaging Inc.
    Inventor: Shu-Sian Yang
  • Control chip for touch panel with high sensitivity
    Patent number: 11599221
    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.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: March 7, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Sung-Han Wu
  • DEVICE ID SETTING METHOD AND ELECTRONIC DEVICE APPLYING THE DEVICE ID SETTING METHOD
    Publication number: 20230066270
    Abstract: An electronic device comprising: a clock pin; at least one data pin; a storage device, configured to store at least one program; a processing circuit, coupled to the clock pin and the data pin. A device ID setting method is performed when the processing circuit executes the program stored in the storage device. The device ID setting method comprises; (a) recording connections between pins between the first electronic device and the second electronic device by the second electronic device; (b) applying the connections as a device ID of the first electronic device by the second electronic device; and (c) setting pins of the first electronic device such that the data pins of the second electronic device are coupled to the data pins of the first electronic device.
    Type: Application
    Filed: August 27, 2021
    Publication date: March 2, 2023
    Applicant: PixArt Imaging Inc.
    Inventors: En-Feng Hsu, Shiaw-Yu Jou, Tien-Chung Yang
  • Pixel circuit to improve sensing efficiency, image sensor using the same and operating method thereof
    Patent number: 11592331
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: February 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu
  • Pixel circuit having capacitor with identical electrodes to improve sensing efficiency and operating method thereof
    Patent number: 11592330
    Abstract: There is provided a circuit to improve the sensing efficiency of pixels that uses the induction effect of a capacitor to duplicate a voltage deviation caused by additional electrons and uses a circuit to cancel out the voltage deviation during reading pixel data thereby improving the sensing efficiency.
    Type: Grant
    Filed: September 14, 2021
    Date of Patent: February 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Yi-Cheng Chiu, Chia-Chi Kuo, Jui-Te Chiu, Han-Chi Liu
  • Barrier structure of optical engine accommodating multiple light sources
    Patent number: 11595554
    Abstract: There is provided an optical engine for a navigation device including a first light source, a second light source, a lens, a barrier structure and an image sensor. The barrier structure has a first space for containing the first light source, a second space for containing the lens and a third space for containing the second light source and the image sensor. The reflected light associated with the first light source propagates to the image sensor via the lens in the second space. The reflected light associated with the second light source propagates to the image sensor via the third space without passing through the lens in the second space.
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: February 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Hung-Yu Lai
  • Connection synchronizing method of Bluetooth system and slave device
    Patent number: 11596006
    Abstract: There is provided a Bluetooth system including multiple slave devices. When a first slave device among the multiple slave devices changes its connection to a different master device, the first slave device actively informs other slave devices among the multiple slave devices to connect to said different master device to realize the Bluetooth connection synchronization between the multiple slave devices.
    Type: Grant
    Filed: March 13, 2020
    Date of Patent: February 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventors: Jr-Kai Liang, Min-Hsiang Hsia
  • Pixel circuit and pixel array outputting over exposure information, and operating method of pixel array
    Patent number: 11595611
    Abstract: There is provided a pixel circuit including a first circuit and a second circuit. The first circuit is used to output a first voltage associated with exposure intensity. The second circuit is used to output a second voltage associated with exposure time interval. The processor multiples the first voltage to a ratio between a reference voltage and the second voltage to obtain an actual light intensity, wherein the reference voltage is a voltage value outputted by the second circuit of a dummy pixel.
    Type: Grant
    Filed: June 20, 2022
    Date of Patent: February 28, 2023
    Assignee: PIXART IMAGING INC.
    Inventor: Wen-Han Yao