Patents Assigned to Pixart Imaging, Inc.
  • Patent number: 11072394
    Abstract: A rotation calculating system, comprising: a first optical characteristic acquiring device, configured to acquire optical characteristics for at least one feature of a first target device; and a calculating unit, configured to calculate rotation for a first rotating device based on the optical characteristics of the feature of the first target device. The first rotating device is a wheel, and the first target device is the wheel.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: July 27, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Chung-Ting Yang, Yen-Min Chang, Ching-Lin Chung
  • Patent number: 11073386
    Abstract: A sensing element includes a plurality of sensing pixel areas arranged in matrix, wherein each of the plurality of sensing pixel areas includes a first pixel, a second pixel, a first shielding layer, a second shielding layer and at least one micro lens. The second pixel is adjacent to the first pixel in a predetermined direction. The first shielding layer is disposed on the first pixel and has a first opening, wherein an aperture of the first opening increases along the predetermined direction from a center of the first pixel. The second shielding layer is disposed on the second pixel and has a second opening, wherein a shape of the second opening is mirror symmetrical with that of the first opening in the predetermined direction. The at least one micro lens is disposed on the first shielding layer and the second shielding layer.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: July 27, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: En-Feng Hsu, Chia-Yu Liu
  • Patent number: 11073413
    Abstract: There is provided an interpolation circuit of an optical encoder including a phase shifter circuit, two multiplexers, two digital circuits and four comparators. The phase shifter circuit receives signals sequentially have a 90 degrees phase shift 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 31, 2019
    Date of Patent: July 27, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: Swee-Lin Thor, Gim-Eng Chew
  • Patent number: 11063028
    Abstract: There is provided an optical navigation module including an optical package and a light reflective element. The optical package includes an image sensor which has a sensor surface. The light reflective element is configured to reflect light propagating parallel to the sensor surface to light propagating perpendicular to the sensor surface to impinge on the sensor surface thereby performing the lateral detection.
    Type: Grant
    Filed: November 26, 2018
    Date of Patent: July 13, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: Sai-Mun Lee, Lye-Pin Chu
  • Patent number: 11054313
    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 30, 2016
    Date of Patent: July 6, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Chih-Ming Sun, Sen-Huang Huang
  • Patent number: 11055548
    Abstract: There is provided an optical sensor including a pixel matrix and a readout circuit. The pixel matrix includes multiple pixels arranged in a matrix, and each of the multiple pixels outputs temporal difference pixel data. The readout circuit sequentially reads the pixel matrix using a readout block, and performs the hybrid difference calculation on the temporal difference pixel data of pixels within the readout block. Accordingly, the output of the readout circuit is the data accomplishing temporal difference and spatial difference.
    Type: Grant
    Filed: June 5, 2020
    Date of Patent: July 6, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: Ren-Chieh Liu, Yi-Hsien Ko, Han-Chi Liu
  • Patent number: 11051758
    Abstract: A wearable electronic device with a function of detecting a wearing state, comprising: at least one electrode; a capacitance calculating circuit, coupled to the electrode, configured to calculate a capacitance variation generated by at least one of the electrode; and a wearing state determining circuit, coupled to the capacitance calculating circuit, configured to determine the wearing state according to the capacitance variation. By this way, the wearing state can be auto detected and the wearable electronic device can be correspondingly control according to the wearing state.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: July 6, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Che-Chia Hsu, Jian-Cheng Liao, Yu-Han Chen, Chi-Chieh Liao
  • Patent number: 11048342
    Abstract: There is provided a dual mode optical navigation device. The dual mode optical navigation device is configured to operate in a first mode or a second mode on a working surface. The dual mode optical navigation device includes an image sensor and a processor. The image sensor captures an image frame of the working surface. The processor calculates a ratio of a bright area and a dark area in one image frame capture by the image sensor, enters the first mode in response to the calculated ratio being larger than a ratio threshold, and enters the second mode in response to the calculated ratio being within a ratio threshold range. The ratio threshold range is smaller than the ratio threshold.
    Type: Grant
    Filed: December 30, 2019
    Date of Patent: June 29, 2021
    Assignee: PIXART IMAGING INC.
    Inventor: Sai-Mun Lee
  • Patent number: 11049264
    Abstract: A marker detecting device comprising: an image sensor, comprising a plurality of difference sensing regions; and a processing circuit, configured to determine a marker exists when a first difference of pixel value data of images captured by different ones of the difference sensing regions is larger than a marker difference threshold and to determine the marker does not exist when the first difference is smaller than the marker difference threshold.
    Type: Grant
    Filed: October 3, 2019
    Date of Patent: June 29, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Keen-Hun Leong, Joon Chok Lee, Yueh Mei Kim
  • Patent number: 11050956
    Abstract: An image sensor includes a transistor, at least one storage capacitor and a voltage provider. The at least one storage capacitor is connected to the transistor. The voltage provider is electrically connected to the transistor and configured to provide an extra voltage for the at least one storage capacitor. The extra voltage is variable in response to images with different brightness. The image sensor includes the voltage provider to provide extra voltage to increase the charging capacity of the storage capacitor. The Signal-Noise-Ratio of the image sensor won't be affected and the fill factor is able to be maintained at a certain level.
    Type: Grant
    Filed: March 29, 2019
    Date of Patent: June 29, 2021
    Assignee: PIXART IMAGING INC.
    Inventor: Wooi-Kip Lim
  • Patent number: 11039081
    Abstract: There is provided an image sensor for exposing a plurality of pixel rows within a frame period using a rolling shutter. The image sensor includes a processor for calculating bright-dark distribution patterns of image frames. The processor further adjusts the frame period to be substantially identical to a predetermined period by changing a total number of exposed line times within the frame period when a difference between the bright-dark distribution patterns of two image frames is larger than a predetermined threshold.
    Type: Grant
    Filed: July 17, 2019
    Date of Patent: June 15, 2021
    Assignee: PIXART IMAGING INC.
    Inventor: Wen-Han Yao
  • Patent number: 11029765
    Abstract: An optical mouse includes a pixel array and a light source. A method for determining when the optical mouse is in a lifted condition above a surface includes: accumulating pixel values of a first column of the pixel array, the first column being closest to the light source; accumulating pixel values of a second column of the pixel array, the second column being different from the first column; comparing the accumulated pixel values of the first column with the accumulated pixel values of the second column; and when a difference between the accumulated pixel values of the first column and the accumulated pixel values of the second column is greater than a threshold value, determining the optical mouse to be in a lifted condition.
    Type: Grant
    Filed: June 3, 2020
    Date of Patent: June 8, 2021
    Assignee: PixArt Imaging Inc.
    Inventor: Chun Heap Leow
  • Patent number: 11029527
    Abstract: An optical mouse operated with respect to an illuminated surface outside the optical mouse is provided. The optical mouse includes a light source configured to emit a light beam, a light sensor, and a light pipe including a first optical element and a second optical element. The light beam enters the light pipe through the first optical element, and then propagates in the light pipe from the first optical element to the second optical element without reflection, and then leaves the light pipe through the second optical element, and then illuminates the illuminated surface. The light sensor is configured to receive at least a part of the light beam reflected or scattered by the illuminated surface.
    Type: Grant
    Filed: July 5, 2019
    Date of Patent: June 8, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: Hun-Kwang Lee, Sai-Mun Lee, Priscilla Tze-Wei Goh, Lye-Pin Chu
  • Patent number: 11029764
    Abstract: An optical detection device capable of detecting a pointer position of a turntable watch includes an optical receiver and a processor. The optical receiver is disposed inside the turntable watch and adapted to receive an optical reflecting signal. The processor is electrically connected to the optical receiver and adapted to compare a physical quantity of the optical reflecting signal with a predefined condition for determining whether a pointer of the turntable watch is located above the optical receiver. The optical detection device further includes an optical emitter electrically connected to the processor and adapted to emit an optical detecting signal. The optical detecting signal is projected onto the pointer to generate the optical reflecting signal.
    Type: Grant
    Filed: June 4, 2019
    Date of Patent: June 8, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Chung-Ting Yang, Kai-Ho Tsai, Yen-Min Chang
  • Patent number: 11020013
    Abstract: A physiological detection device includes an array sensor and a processing unit. The array sensor is configured to output array photoplethysmography (PPG) signals. The processing unit is configured to construct a 3D energy distribution, and identify an arc-like pattern in the 3D energy distribution according to the array PPG signals to accordingly identify different microcirculation states and an attaching status.
    Type: Grant
    Filed: June 4, 2018
    Date of Patent: June 1, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: Chiung-Wen Lin, Wei-Ru Han, Yang-Ming Chou, Cheng-Nan Tsai, Ren-Hau Gu, Chih-Yuan Chuang
  • Patent number: 11016535
    Abstract: A wearable electronic device which can detect a wearing state, comprising: at least one first electrode, provided in a first region of the wearable electronic device; at least one second electrode, provided in a second region of the wearable electronic device; a capacitance calculating circuit, configured to calculate first capacitances generated by the first electrode and configured to calculate second capacitances generated by the second electrode, wherein the capacitance calculating circuit further calculates a capacitance difference between the first capacitance and the second capacitance; and a processing circuit, configured to determine the wearing state according to the capacitance difference. Via such structure, a wearing state, a wearing location, a wearing angle of the electronic device can be automatically detected, thus the problem caused by an improper wearing manner can be improved.
    Type: Grant
    Filed: January 21, 2020
    Date of Patent: May 25, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Ming-Hung Tsai, Tse-Chung Su, Ren-Hau Gu, Tzung-Min Su
  • Patent number: 11018170
    Abstract: An image sensor includes a pair of pixel sharing circuits, a second reset transistor, an amplifier transistor, a readout transistor and a control circuit. The pair of pixel sharing circuits connected to a floating diffusion node, each including a photon device, a first reset transistor, a capture transistor, a holding transistor, a capacitor and a sharing transistor. The control circuit is configured to control the first reset transistor, the first capture transistor, the first holding transistor and the sharing transistor of each of the pair of sharing pixel circuits to be turned on or off.
    Type: Grant
    Filed: June 28, 2019
    Date of Patent: May 25, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: Kuan Tang, Jui-Te Chiu, Yi-Cheng Chiu, Chia-Chi Kuo, Kai-Chieh Chuang
  • Patent number: 11015927
    Abstract: An optical sensor includes at least two optical sensing pixels and at least two different grating elements. These grating elements are disposed above these optical sensing pixels correspondingly.
    Type: Grant
    Filed: November 6, 2019
    Date of Patent: May 25, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: En-Feng Hsu, Chia-Yu Liu
  • Patent number: 11011042
    Abstract: A wearable device includes: a sensing circuit and a processing circuit, wherein the sensing circuit is arranged to generate a wearing information output in each of a plurality of detecting periods, and the processing circuit is arranged to inform a wearing status indicative of a status of wearing the wearable device according to wearing information outputs generated in the plurality of detecting periods.
    Type: Grant
    Filed: June 8, 2017
    Date of Patent: May 18, 2021
    Assignee: PixArt Imaging Inc.
    Inventors: Hsiu-Ling Yeh, Yung-Chang Lin
  • Patent number: RE48624
    Abstract: An event data recorder (EDR) is configured to operate in a driving mode and a parking mode. In the driving mode, the EDR is configured to perform high quality video recording using an image-capturing circuit. In the parking mode, the EDR is configured to periodically activate the image-capturing circuit for event detection and start to perform low quality video recording after detecting a specific event.
    Type: Grant
    Filed: May 4, 2017
    Date of Patent: July 6, 2021
    Assignee: PIXART IMAGING INC.
    Inventors: En-Feng Hsu, Ming-Tsan Kao