公开(公告)号：US20230283928A1

公开(公告)日：2023-09-07

申请号：US18314748

申请日：2023-05-09

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Zhe Gao ,  Tiejun Dai ,  Ling Fu ,  Qing Qin ,  Andreas Suess

IPC: H04N25/772 ,  H01L27/146 ,  H04N25/75 ,  H04N25/79 ,  H04N25/443 ,  H04N25/445

CPC classification number: H04N25/772 ,  H01L27/14612 ,  H01L27/1463 ,  H04N25/75 ,  H04N25/79 ,  H04N25/443 ,  H04N25/445

Abstract: An optical sensor includes a pixel array of pixel cells. Each pixel cell includes photodiodes to photogenerate charge in response to incident light and a source follower to generate an image data signal in response to the charge photogenerated from the photodiodes. An image readout circuit is coupled to the pixel cells to read out the image data signal generated from the source follower of at least one of the pixel cells of a row of the pixel array. An event driven circuit is coupled to the pixel cells to read out the event data signals generated in response to the charge from the photodiodes of another row of the pixel cells of the pixel array. The image readout circuit is coupled to read out the image data signal and the event driven circuit is coupled to read out the event data signals from pixel array simultaneously.

公开(公告)号：US20230147085A1

公开(公告)日：2023-05-11

申请号：US17513069

申请日：2021-10-28

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Zheng Yang ,  Qi Niu ,  Andreas Suess

IPC: H04N13/254 ,  H03K5/24 ,  H03G3/30 ,  H04N13/296 ,  H04N13/271 ,  G01S17/894

CPC classification number: H04N13/254 ,  G01S17/894 ,  H03G3/30 ,  H03K5/24 ,  H04N13/271 ,  H04N13/296

Abstract: A time-of-flight sensor includes an integrated circuit chip in which a voltage regulator and a load are disposed. The load includes a grouping of pixel circuits and modulation driver that is supplied power from the voltage regulator. The grouping of pixel circuits included in a pixel array disposed in the integrated circuit trip. Each one of the pixel circuits includes a photodiode configured to photogenerate charge in response to reflected modulated light, a floating diffusion configured to store a portion of charge photogenerated in the photodiode, and transfer transistor to transfer the portion of charge from the photodiode to the floating diffusion in response to a phase modulation signal generated by the modulation driver. A feedback circuit is coupled between the load and the voltage regulator and is coupled to receive a feedback signal from the feedback circuit in response to the load.

公开(公告)号：US20230139234A1

公开(公告)日：2023-05-04

申请号：US17517971

申请日：2021-11-03

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Andreas Suess ,  Zheng Yang

IPC: H04N5/369 ,  H04N5/347 ,  H04N5/378 ,  G01S7/481 ,  G01S17/894

Abstract: A time-of-flight pixel array includes photodiodes that generate charge in response to incident reflected modulated light. First transfer transistors transfer a first portion of the charge from the photodiodes in response to a first modulation signal and second transfer transistors transfer a second portion of the charge from the photodiodes in response to a second modulation signal, which is an inverted first modulation signal. First floating diffusions are coupled to the first transfer transistors. A binning transistor is coupled between one of the first floating diffusions and another one of the first floating diffusions. A first memory node is coupled to one of the first floating diffusions through a first sample and hold transistor and a second memory node is coupled to another one of the first floating diffusions through a second sample and hold transistor.

公开(公告)号：US20220201236A1

公开(公告)日：2022-06-23

申请号：US17125630

申请日：2020-12-17

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Zhe Gao ,  Tiejun Dai ,  Ling Fu ,  Qing Qin ,  Andreas Suess

IPC: H04N5/3745 ,  H01L27/146

Abstract: An optical sensor includes a pixel array of pixel cells. Each pixel cell includes photodiodes to photogenerate charge in response to incident light and a source follower to generate an image data signal in response to the charge photogenerated from the photodiodes. An image readout circuit is coupled to the pixel cells to read out the image data signal generated from the source follower of at least one of the pixel cells of a row of the pixel array. An event driven circuit is coupled to the pixel cells to read out the event data signals generated in response to the charge from the photodiodes of another row of the pixel cells of the pixel array. The image readout circuit is coupled to read out the image data signal and the event driven circuit is coupled to read out the event data signals from pixel array simultaneously.

公开(公告)号：US20250159375A1

公开(公告)日：2025-05-15

申请号：US18937933

申请日：2024-11-05

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Tiejun Dai ,  Bo Mu ,  Menghan Guo ,  Wenlei Yang ,  Qinyi Wang ,  Andreas Suess

IPC: H04N25/707 ,  H04N23/45 ,  H04N25/47 ,  H04N25/531 ,  H04N25/62 ,  H04N25/76

Abstract: Hybrid image sensors with adjustable contrast thresholds (and associated systems, devices, and methods) are disclosed herein. In one embodiment, an imaging system comprises one or more event vision sensor (EVS) pixels, and a plurality of CMOS image sensor (CIS) pixels. Each EVS pixel can be configured to, based on a contrast threshold, capture event data corresponding to contrast information of light incident on the EVS pixel. Each CIS pixel can be configured to capture CIS data corresponding to intensity of light incident on the CIS pixel. The imaging system can further comprise (i) a contrast threshold calibration circuit configured to adjust a value of the contrast threshold over time, and (ii) a deblur circuit configured to generate deblurred image data by deblurring the CIS data captured by the plurality of CIS pixels using at least a portion of the event data captured by the one or more EVS pixels.

公开(公告)号：US20250159367A1

公开(公告)日：2025-05-15

申请号：US18938125

申请日：2024-11-05

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Tiejun Dai ,  Bo Mu ,  Menghan Guo ,  Wenlei Yang ,  Qinyi Wang ,  Andreas Suess

IPC: H04N25/42 ,  H04N25/46 ,  H04N25/47 ,  H04N25/707 ,  H04N25/78

Abstract: Methods for operating hybrid image sensors having different CIS-to-EVS resolutions (and associated systems, devices, and methods) are disclosed herein. In one embodiment, an imaging system includes a hybrid image sensor including (a) an event driven sensing array including one or more event vision sensor (EVS) pixels arranged in one or more EVS pixel rows and configured to capture EVS data having an EVS resolution, and (b) a pixel array including a plurality of CMOS image sensor (CIS) pixels arranged in one or more CIS pixel rows and configured to capture CIS data having a CIS resolution. The imaging system can further include control circuitry configured to adjust the CIS resolution of the CIS data and/or the EVS resolution of the EVS data such that a mismatch between the CIS resolution and the EVS resolution is reduced.

公开(公告)号：US20240188841A1

公开(公告)日：2024-06-13

申请号：US18076740

申请日：2022-12-07

Applicant: OmniVision Technologies, Inc.

Inventor： Paul Wickboldt ,  Andreas Suess

IPC: A61B5/0295 ,  A61B5/00 ,  A61B5/021

CPC classification number: A61B5/0295 ,  A61B5/0031 ,  A61B5/02125

Abstract: A device has a first and second PPD sensor configured for placement over an artery; a camera between the first and second PPD sensors; and a processor having memory with firmware for determining pulse transit time (PTT) between the PPD sensors, and determines blood pressure (BP) therefrom using a calibrated conversion from PTT to BP. The firmware also obtains initial and subsequent images of the artery, extracts features, and adjusts calibrated conversion from PTT to BP based upon features extracted from the initial and subsequent images of the artery. In embodiments the processor enhances the initial and subsequent images of the artery using a structured light tomographic enhancement process. A method uses first and second PPD sensors placed over an artery to determine pulse transit time; obtains initial and subsequent images of the artery with a camera; and uses features extracted from the initial and subsequent images of the artery to adjust a calibrated conversion from PTT to BP.

公开(公告)号：US20230047774A1

公开(公告)日：2023-02-16

申请号：US17402297

申请日：2021-08-13

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Shoushun Chen ,  Menghan Guo ,  Andreas Suess

IPC: H04N5/369 ,  H04N5/378

Abstract: An event sensing system includes a pixel array including a plurality of event driven pixel circuits configured to be illuminated by incident light. The event driven pixel circuits are configured to generate an event current in response to a detection of an event in the incident light. Output signals of a row of the pixel array are configured to be read out from the row of the pixel array to a line buffer in response to the detection of the event in the incident light. A random number generator is configured to randomly generate a filtering mask. A mask circuit is the output signals of the row of the pixel array from the line buffer and the filtering mask from the random number generator to filter the output signals of the row of the pixel array in response to the filtering mask.

公开(公告)号：US11563909B1

公开(公告)日：2023-01-24

申请号：US17402297

申请日：2021-08-13

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Shoushun Chen ,  Menghan Guo ,  Andreas Suess

IPC: H04N5/345 ,  H04N5/369 ,  H04N5/378

Abstract: An event sensing system includes a pixel array including a plurality of event driven pixel circuits configured to be illuminated by incident light. The event driven pixel circuits are configured to generate an event current in response to a detection of an event in the incident light. Output signals of a row of the pixel array are configured to be read out from the row of the pixel array to a line buffer in response to the detection of the event in the incident light. A random number generator is configured to randomly generate a filtering mask. A mask circuit is the output signals of the row of the pixel array from the line buffer and the filtering mask from the random number generator to filter the output signals of the row of the pixel array in response to the filtering mask.

公开(公告)号：US20250119660A1

公开(公告)日：2025-04-10

申请号：US18483501

申请日：2023-10-09

Applicant: OMNIVISION TECHNOLOGIES, INC.

Inventor： Andreas Suess ,  Menghan Guo ,  Shoushun Chen

IPC: H04N25/683

Abstract: Event vision sensors with defect pixel suppression (and associated methods) are disclosed herein. In one embodiment, an event vision sensor includes an array of event vision pixels and an event signal processor. The event signal processor is configured to identify event vision pixels of the array that are defective based on noise event occurrence firing rates corresponding to the event vision pixels. The noise event occurrence firing rate for each event vision pixel can be based on measurements of a probability of that event vision pixel detecting a noise event over time. Each event vision pixel can include internal circuitry (e.g., a memory component, such as a latch) that can, when the event vision pixel is identified as defective, be used to disable the event vision pixel from detecting events or to mask an output of the event vision pixel such that events are not read out of the pixel.