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公开(公告)号：US11240454B2
公开(公告)日：2022-02-01
申请号：US16862337
申请日：2020-04-29
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Zhe Gao , Tiejun Dai
IPC: H04N5/3745 , H04N5/378
Abstract: An image sensor includes a source follower coupled to a photodiode to generate an image signal responsive to photogenerated charge. The image signal is received by image readout circuitry through a row select transistor. A reset transistor resets the photogenerated charge. A first node of mode select circuit is coupled to the reset transistor, a second node is coupled to a pixel supply voltage, and a third node is coupled to an event driven circuit. The mode select circuit couples the first node to the second node during an imaging mode to supply the pixel supply voltage to the reset transistor. The mode select circuit is further configured to couple the first node to the third node during an event driven mode to couple a photocurrent of the photodiode to drive the event driven circuit through the reset transistor to detect changes in the photocurrent.
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公开(公告)号：US11212467B2
公开(公告)日：2021-12-28
申请号：US16516067
申请日：2019-07-18
Applicant: OmniVision Technologies, Inc.
Inventor： Zhe Gao , Ling Fu , Yu-Shen Yang , Tiejun Dai
Abstract: A switch driver circuit includes a first transistor coupled between a voltage supply and a first output node. A second transistor is coupled between the first output node and a first discharge node. A first slope control circuit is coupled to the first discharge node to discharge the first discharge node at a first slope. A third transistor is coupled between the voltage supply and a second output node. A fourth transistor is coupled between the second output node and a second discharge node. A second slope control circuit coupled to the second discharge node to discharge the second discharge node at a second slope. The first and second slopes are mismatched.
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公开(公告)号：US20210358994A1
公开(公告)日：2021-11-18
申请号：US17066277
申请日：2020-10-08
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Sang Joo Lee , Rui Wang , Hiroaki Ebihara , Tiejun Dai , Hiroki Ui
IPC: H01L27/146 , H01L27/148 , H04N5/378
Abstract: A pixel array includes pixel cells disposed in semiconductor material. Each of the pixel cells includes photodiodes, and a floating diffusion to receive image charge from the photodiodes. A source follower is coupled to the floating diffusion to generate an image signal in response image charge from the photodiodes. Drain regions of first and second row select transistors are coupled to a source of the source follower. A common junction is disposed in the semiconductor material between gates of the first and second row select transistors such that the drains of the first and second row select transistors are shared and coupled together through the semiconductor material of the common junction. The pixel cells are organized into a rows and columns with bitlines.
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公开(公告)号：US11140352B1
公开(公告)日：2021-10-05
申请号：US17121423
申请日：2020-12-14
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Tiejun Dai , Zhe Gao , Ling Fu
IPC: H04N5/378 , H04N5/3745 , H03M1/34 , H04N5/355
Abstract: A readout circuit for use in an image sensor includes a first sample and hold (SH) circuit coupled to a bitline that is coupled to a pixel array. A second SH circuit is coupled to the bitline. A bypass switch is coupled to the bitline, the first SH circuit, and the second SH circuit. An analog to digital converter (ADC) is coupled to the bypass switch. The bypass switch is configured to provide an image charge value from the pixel array to the ADC through the bitline, or through one of the first SH circuit or the second SH circuit in response to a switch select signal.
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公开(公告)号：US10834351B2
公开(公告)日：2020-11-10
申请号：US16199887
申请日：2018-11-26
Applicant: OmniVision Technologies, Inc.
Inventor： Rui Wang , Tiejun Dai , Ling Fu , Jiayu Guo
Abstract: An image sensor includes pixel circuitry with a photodiode to receive light and output a pixel signal. The image sensor also includes readout circuitry with a first sample and hold transistor coupled to the pixel circuitry, and a first capacitor coupled to the first sample and hold transistor to receive the pixel signal. A second sample and hold transistor is coupled to the pixel circuitry, and a second capacitor is coupled to the second sample and hold transistor to receive the pixel signal. A first output switch is coupled to output the pixel signal from the first capacitor, and a second output switch is coupled to output the pixel signal from the second capacitor. A boost transistor is coupled to connect the first output switch and the second output switch when the boost transistor is turned on.
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Patent Agency Ranking
公开(公告)号：US20200169682A1
公开(公告)日：2020-05-28
申请号：US16199887
申请日：2018-11-26
Applicant: OmniVision Technologies, Inc.
Inventor： Rui Wang , Tiejun Dai , Ling Fu , Jiayu Guo
Abstract: An image sensor includes pixel circuitry with a photodiode to receive light and output a pixel signal. The image sensor also includes readout circuitry with a first sample and hold transistor coupled to the pixel circuitry, and a first capacitor coupled to the first sample and hold transistor to receive the pixel signal. A second sample and hold transistor is coupled to the pixel circuitry, and a second capacitor is coupled to the second sample and hold transistor to receive the pixel signal. A first output switch is coupled to output the pixel signal from the first capacitor, and a second output switch is coupled to output the pixel signal from the second capacitor. A boost transistor is coupled to connect the first output switch and the second output switch when the boost transistor is turned on.
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公开(公告)号：US10263031B2
公开(公告)日：2019-04-16
申请号：US15421911
申请日：2017-02-01
Applicant: OmniVision Technologies, Inc.
Inventor： Rui Wang , Hiroaki Ebihara , Zheng Yang , Chun-Ming Tang , Chao-Fang Tsai , Tiejun Dai
IPC: H01J40/14 , H01L27/146 , H04N5/3745 , H04N5/369
Abstract: A hybrid-bonded image sensor has a photodiode die with multiple macrocells; each macrocell has at least one photodiode and a coupling region. The coupling regions couple to a coupling region of a macrocell unit of a supporting circuitry die where they feed an input of an amplifier and a feedback capacitor. The feedback capacitor also couples to output of the amplifier, and the amplifier inverts between the input and the output. The method includes resetting a photodiode of the photodiode die; coupling signal from photodiode through the bond point to the supporting circuitry die to a feedback capacitor and to an input of the amplifier, the feedback capacitor also coupled to an inverting output of the amplifier; and amplifying the signal with the amplifier, where a capacitance of the feedback capacitor determines a gain of the amplifier.
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公开(公告)号：US20190068927A1
公开(公告)日：2019-02-28
申请号：US15691678
申请日：2017-08-30
Applicant: OmniVision Technologies, Inc.
Inventor： Xiang-Dong Xiong , Tiejun Dai , Heng Fan
IPC: H04N7/22 , H04N5/369 , H04N5/378 , H04N5/376 , H04N7/10 , H04N5/225 , G02B23/24 , A61B1/00 , A61B1/05
Abstract: An image sensor system, comprising: an image sensor including an image sensing pixel array; a supporting module; a ground line coupling the image sensor with the supporting module; a power line coupling the image sensor with the supporting module; a data/control line coupling the image sensor with the supporting module; and a clock line coupling the image sensor with the supporting module; wherein the ground line and the power line are based on electrical conduction, and wherein the clock line is based on fiber optics.
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公开(公告)号：US09961292B1
公开(公告)日：2018-05-01
申请号：US15420531
申请日：2017-01-31
Applicant: OMNIVISION TECHNOLOGIES, INC.
Inventor： Liping Deng , Zheng Yang , Chun-Ming Tang , Tiejun Dai
CPC classification number: H03F3/082 , H03F1/0261 , H03F1/223 , H04N5/355 , H04N5/3745
Abstract: A pixel circuit includes a photodiode, and a transfer transistor coupled to the photodiode. A floating diffusion is coupled to the transfer transistor coupled to transfer image charge from the photodiode to the floating diffusion. An amplifier circuit includes an input coupled to the floating diffusion, an output coupled to generate an image data signal of the pixel circuit, and a variable bias terminal coupled to receive a variable bias signal. A reset switch is coupled between the output and input of the amplifier circuit to reset the amplifier circuit in response to a reset signal. A variable bias generator circuit is coupled to generate the variable bias signal in response to a reset signal to transition the variable bias signal from a first bias signal value to a second bias signal value in response to a transition of the reset signal from an active state to an inactive state.
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公开(公告)号：US09570507B2
公开(公告)日：2017-02-14
申请号：US13897189
申请日：2013-05-17
Applicant: OmniVision Technologies, Inc.
Inventor： Hidetoshi Nozaki , Tiejun Dai
IPC: H01L27/148 , H01L27/146 , H01L29/10 , H01L29/66
CPC classification number: H01L27/148 , H01L27/14601 , H01L27/14603 , H01L27/1461 , H01L27/14612 , H01L27/14614 , H01L27/14616 , H01L29/1079 , H01L29/1083 , H01L29/66537 , H01L2924/12043
Abstract: An image sensor pixel includes a semiconductor layer, a photosensitive region to accumulate photo-generated charge, a floating node, a trench, and an entrenched transfer gate. The photosensitive region and the trench are disposed within the semiconductor layer. The trench extends into the semiconductor layer between the photosensitive region and the floating node and the entrenched transfer gate is disposed within the trench to control transfer of the photo-generated charge from the photosensitive region to the floating node.
Abstract translation: 图像传感器像素包括半导体层，用于积累光电荷的光敏区域，浮动节点，沟槽和根深蒂的传输门。 感光区域和沟槽设置在半导体层内。 沟槽延伸到光敏区域和浮动节点之间的半导体层中，并且固定的传输栅极设置在沟槽内，以控制光生电荷从感光区域到浮动节点的转移。
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