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    PRECHARGED LATCHED PIXEL CELL FOR A TIME OF FLIGHT 3D IMAGE SENSOR
    71.
    发明申请
    PRECHARGED LATCHED PIXEL CELL FOR A TIME OF FLIGHT 3D IMAGE SENSOR 有权
    用于飞行3D图像传感器的预先锁定的像素单元

    公开(公告)号：US20160044296A1

    公开(公告)日：2016-02-11

    申请号：US14454542

    申请日：2014-08-07

    Applicant: OMNIVISION TECHNOLOGIES, INC.

    Inventor： Tianjia Sun ,  Rui Wang ,  Tiejun Dai

    IPC: H04N13/02

    CPC classification number: H04N13/271 ,  G01S7/4863 ,  G01S17/89 ,  H04N13/254

    Abstract: A pixel cell includes a latch having an input terminal and an output terminal. The latch is coupled to provide a latched output signal at the output terminal responsive to the input terminal. A first precharge circuit is coupled to precharge the input terminal of the latch to a first level during a reset of the pixel cell. A single photon avalanche photodiode (SPAD) is coupled to provide a SPAD signal to the input terminal of the latch in response to a detection of a photon incident on the SPAD.

    Abstract translation: 像素单元包括具有输入端和输出端的锁存器。 锁存器被耦合以响应于输入端在输出端提供锁存的输出信号。 第一预充电电路被耦合以在像素单元的复位期间将锁存器的输入端子预充电到第一电平。 耦合单个光子雪崩光电二极管（SPAD）以响应于对入射在SPAD上的光子的检测而向锁存器的输入端提供SPAD信号。

    PIXEL-LEVEL OVERSAMPLING FOR A TIME OF FLIGHT 3D IMAGE SENSOR WITH DUAL RANGE MEASUREMENTS
    72.
    发明申请
    PIXEL-LEVEL OVERSAMPLING FOR A TIME OF FLIGHT 3D IMAGE SENSOR WITH DUAL RANGE MEASUREMENTS 有权
    具有双范围测量的飞行3D图像传感器时间的像素级超声

    公开(公告)号：US20160010986A1

    公开(公告)日：2016-01-14

    申请号：US14330212

    申请日：2014-07-14

    Applicant: OMNIVISION TECHNOLOGIES, INC.

    Inventor： Tianjia Sun ,  Rui Wang ,  Tiejun Dai

    IPC: G01C3/08

    CPC classification number: G01S7/4865 ,  G01S7/4863 ,  G01S17/105 ,  G01S17/89

    Abstract: A time of flight pixel cell includes a photosensor to sense photons reflected from an object. Pixel support circuitry including charging control logic is coupled to the photosensor to detect when the photosensor senses the photons reflected from the object, and coupled to receive timing signals representative of when light pulses are emitted from a light source. A controllable current source is coupled to receive a time of flight signal form the charging control logic to provide a charge current when a light pulse emitted from the light source until the photosensor senses a respective one of the photons reflected from the object. A capacitor is coupled to receive the charge current, and a voltage on the capacitor is representative of a round trip distance to the object. A reset circuit is coupled to reset the voltage on the capacitor after being charged a plurality number of times.

    Abstract translation: 飞行时间像素单元包括用于感测从物体反射的光子的光电传感器。 包括充电控制逻辑的像素支持电路耦合到光传感器以检测何时光传感器感测从物体反射的光子，并耦合以接收表示从光源发出光脉冲的定时信号。 耦合可控电流源以从充电控制逻辑接收飞行时间信号，以在从光源发射的光脉冲直到光传感器感测从物体反射的相应的一个光子时提供充电电流。 电容器被耦合以接收充电电流，并且电容器上的电压代表到物体的往返距离。 复位电路被耦合以在多次充电之后复位电容器上的电压。

    Low power imaging system with single photon avalanche diode photon counters and ghost image reduction
    73.
    发明授权
    Low power imaging system with single photon avalanche diode photon counters and ghost image reduction 有权
    具有单光子雪崩二极管光子计数器和鬼影减影的低功率成像系统

    公开(公告)号：US09210350B2

    公开(公告)日：2015-12-08

    申请号：US14100941

    申请日：2013-12-09

    Applicant: OMNIVISION TECHNOLOGIES, INC.

    Inventor： Tiejun Dai ,  Rui Wang

    IPC: H04N5/235 ,  H04N5/228 ,  H04N5/225 ,  H04N5/378 ,  H04N5/355 ,  H04N5/353

    CPC classification number: H04N5/378 ,  H04N5/3535 ,  H04N5/35545 ,  H04N5/35554 ,  H04N5/35572 ,  H04N5/37455

    Abstract: An imaging system includes a pixel array including a plurality of pixels. Each one of the pixels includes a single photon avalanche diode (SPAD) coupled to detect photons in response to incident light. A photon counter included in readout circuitry coupled to each pixel to count a number of photons detected by each pixel. The photon counter is coupled to stop counting photons in each pixel when a threshold photon count is reached for each pixel. Control circuitry is coupled to the pixel array to control operation of the pixel array. The control circuitry includes an exposure time counter coupled to count a number of exposure times elapsed before each pixel detects the threshold photon count. Respective exposure time counts and photon counts are combined for each pixel of the pixel array.

    Abstract translation: 成像系统包括包括多个像素的像素阵列。 每个像素包括耦合以响应于入射光检测光子的单个光子雪崩二极管（SPAD）。 包括在耦合到每个像素的读出电路中的光子计数器以对由每个像素检测的多个光子进行计数。 当达到每个像素的阈值光子计数时，光子计数器被耦合以停止计数每个像素中的光子。 控制电路耦合到像素阵列以控制像素阵列的操作。 控制电路包括曝光时间计数器，其被耦合以对每个像素检测到阈值光子计数之前经过的曝光次数进行计数。 对像素阵列的每个像素组合相应的曝光时间计数和光子计数。

    Image sensor with fast intra-frame focus
    74.
    发明授权
    Image sensor with fast intra-frame focus 有权
    具有快速帧内对焦的图像传感器

    公开(公告)号：US09124823B2

    公开(公告)日：2015-09-01

    申请号：US13950970

    申请日：2013-07-25

    Applicant: OMNIVISION TECHNOLOGIES, INC.

    Inventor： Tiejun Dai ,  Eiichi Funatsu ,  Donghui Wu ,  Zheng Yang ,  Xiao Xie

    IPC: H04N5/232 ,  H04N5/335

    CPC classification number: H04N5/335 ,  H04N5/23212

    Abstract: A method of focusing an image sensor includes scanning a first portion of an image frame from an image sensor a first time at a first rate to produce first focus data. A second portion of the image frame from the image sensor is scanned at a second rate to read image data from the second portion. The first rate is greater than the second rate. The first portion of the image frame is scanned a second time at the first rate to produce second focus data. The first focus data and the second focus data are compared, and the focus of a lens is adjusted in response to the comparison of the first focus data and the second focus data.

    Abstract translation: 聚焦图像传感器的方法包括以第一速率首先从图像传感器扫描图像帧的第一部分以产生第一焦点数据。 以第二速率扫描来自图像传感器的图像帧的第二部分，以从第二部分读取图像数据。 第一个比率大于第二个比率。 以第一速率第二次扫描图像帧的第一部分以产生第二焦点数据。 比较第一焦点数据和第二焦点数据，并且响应于第一焦点数据和第二焦点数据的比较来调整透镜的焦点。

    METHOD AND APPARATUS FOR READING IMAGE DATA FROM AN IMAGE SENSOR
    75.
    发明申请
    METHOD AND APPARATUS FOR READING IMAGE DATA FROM AN IMAGE SENSOR 有权
    从图像传感器读取图像数据的方法和装置

    公开(公告)号：US20150070547A1

    公开(公告)日：2015-03-12

    申请号：US14024123

    申请日：2013-09-11

    Applicant: OMNIVISION TECHNOLOGIES, INC.

    Inventor： Tiejun Dai ,  Zheng Yang ,  Shijing Yao

    IPC: H04N5/369 ,  H04N5/374

    CPC classification number: H04N5/374 ,  H04N5/37457

    Abstract: A method of reading image data from an image sensor includes accumulating image charges in photosensitive elements of an array of pixel cells. The accumulated image charges are transferred to corresponding transistors in multi-phase transfer channels that are coupled to corresponding columns of the pixel array. Multi-phase transfer signals are generated. Each set of the multi-phase transfer signals includes a plurality of control signals that are out-of-phase with one another and are coupled to control respective transistors in the multi-phase transfer channels. The accumulated image charges from a first variable number of pixel cells of a selected column are output in response to the multi-phase transfer signals. The accumulated image charges from a second variable number of pixel cells of another selected column are output in response to the multi-phase transfer signals.

    Abstract translation: 从图像传感器读取图像数据的方法包括在像素单元阵列的感光元件中累积图像电荷。 累积的图像电荷被传送到耦合到像素阵列的相应列的多相传输通道中的相应晶体管。 产生多相传输信号。 每组多相传输信号包括彼此不同相的多个控制信号，并被耦合以控制多相传输信道中的各个晶体管。 响应于多相传输信号输出来自所选列的第一可变数目的像素单元的累积图像电荷。 响应于多相传输信号输出来自另一所选列的第二可变数目的像素单元的累积图像电荷。

    Pixel circuit for high dynamic range image sensor
    77.
    发明授权
    Pixel circuit for high dynamic range image sensor 有权

    公开(公告)号：US12185000B2

    公开(公告)日：2024-12-31

    申请号：US17810966

    申请日：2022-07-06

    Applicant: OMNIVISION TECHNOLOGIES, INC.

    Inventor： Keiji Mabuchi ,  Tiejun Dai

    IPC: H04N25/59 ,  H04N25/46 ,  H04N25/585 ,  H04N25/621 ,  H04N25/771 ,  H04N25/778 ,  H04N25/79

    Abstract: A pixel circuit includes a first photodiode and a second photodiode. The first and second photodiodes photogenerate charge in response to incident light. A first transfer transistor is coupled to the first photodiode. A first floating diffusion is coupled to the first transfer transistor. A second transfer transistor is coupled to the second photodiode. A second floating diffusion is coupled to the second transfer transistor. A dual floating diffusion transistor is coupled between the first and second floating diffusions. An overflow transistor is coupled to the second photodiode. A capacitor is coupled between a voltage source and the overflow transistor. A capacitor readout transistor is coupled between the capacitor and the second floating diffusion. An anti-blooming transistor coupled between the first photodiode and a power line.

    CAPMID DESIGN IN VRFD FOR HDR STRUCTURE
    78.
    发明公开
    CAPMID DESIGN IN VRFD FOR HDR STRUCTURE 审中-公开

    公开(公告)号：US20240357253A1

    公开(公告)日：2024-10-24

    申请号：US18303479

    申请日：2023-04-19

    Applicant: OMNIVISION TECHNOLOGIES, INC.

    Inventor： Zhe Gao ,  Ling Fu ,  Qing Qin ,  Zhiyong Zhan ,  Tiejun Dai

    IPC: H04N25/77 ,  H04N25/78

    CPC classification number: H04N25/77 ,  H04N25/78

    Abstract: A pixel circuit includes a photodiode configured to photo generate image charge in response to incident light, a floating diffusion coupled to receive the image charge from the photodiode, a transfer transistor coupled between the photodiode and the floating diffusion to transfer the image charge from the photodiode to the floating diffusion, a reset transistor coupled between a variable voltage source and the floating diffusion, wherein the reset transistor is configured to be switched in response to a reset control signal, and a lateral overflow integration capacitor (LOFIC) coupled between the variable voltage source and the floating diffusion. The variable voltage source is configured to output a high-voltage level during a high conversion gain (HCG) reset signal readout and an HCG image signal readout, and a mid-voltage level during a LOFIC image signal readout and a LOFIC reset signal readout.

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