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公开(公告)号：US20250097367A1
公开(公告)日：2025-03-20
申请号：US18370594
申请日：2023-09-20
Applicant: CISTA SYSTEM CORP.
Inventor： Hong ZHOU , Zhaojian LI
Abstract: This application describes method and apparatus for color noise reduction to enhance the quality of color images. An example method first takes a color image as its input and converts it into a Luminance-Chrominance color space, resulting in an YUV image. This YUV representation consists of a Y-channel (Luminance information), which encapsulates the luminance information responsible for the image's brightness, and UV-channels, which represent the chrominance information responsible for the color information. Then a guided filter is created using the Y-channel of the YUV image. The guided filter acts as a reference and assists in refining the subsequent noise reduction steps. With the guided filter in place, the method performs color noise reduction in the UV-channels of the YUV image, where the color noise is primarily present, resulting in smoother and cleaner color values.
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公开(公告)号：US20240340508A1
公开(公告)日：2024-10-10
申请号：US18745803
申请日：2024-06-17
Applicant: CISTA SYSTEM CORP.
Inventor： Zhaojian LI , Jiangtao Pang
IPC: H04N23/45 , H04N5/265 , H04N13/106 , H04N23/741
CPC classification number: H04N23/45 , H04N5/265 , H04N13/158 , H04N23/741
Abstract: Provided are an image sensor with one or more image receivers for image combining, and an imaging system and method therefor. The image sensor includes an image sensor array to generate first image data for a first image; a receiver to receive, into the image sensor, second image data for a second image; an image combination circuit coupled to the image sensor array and the receiver to receive the first image data and the second image data and combine the first image data and the second image data into combined image data for a single combined image, according to one or more image combination criteria, and at least one of the first image data and the second image data; and a transmitter coupled to the image combination circuit to transmit the combined image data for the combined image from the image sensor.
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公开(公告)号：US12096100B2
公开(公告)日：2024-09-17
申请号：US18220460
申请日：2023-07-11
Applicant: CISTA SYSTEM CORP.
Inventor： Zhaojian Li , Jiangtao Pang
IPC: H04N23/45 , H04N5/265 , H04N13/106 , H04N23/741
CPC classification number: H04N23/45 , H04N5/265 , H04N13/158 , H04N23/741
Abstract: Provided are an image sensor with one or more image receivers for image combining, and an imaging system and method therefor. The image sensor includes an image sensor array to generate first image data for a first image; a receiver to receive, into the image sensor, second image data for a second image; an image combination circuit coupled to the image sensor array and the receiver to receive the first image data and the second image data and combine the first image data and the second image data into combined image data for a single combined image, according to one or more image combination criteria, and at least one of the first image data and the second image data; and a transmitter coupled to the image combination circuit to transmit the combined image data for the combined image from the image sensor.
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公开(公告)号：US20240071846A1
公开(公告)日：2024-02-29
申请号：US17897725
申请日：2022-08-29
Applicant: CISTA SYSTEM CORP.
Inventor： Jingyi BAI , Bo-Ray LEE
IPC: H01L21/66 , G01R31/26 , H01L27/146
CPC classification number: H01L22/34 , G01R31/2621 , H01L27/1463
Abstract: This application describes systems and methods for detecting depth in deep trench isolation with semiconductor devices using test key transistors. An example semiconductor device comprises a test key transistor comprising a source, a drain, a channel connected to the source and the drain, and a gate; and a deep trench isolation encroaching into the channel of the test key transistor, wherein: the test key transistor is associated with a specification including a preset gate voltage, a preset source-drain voltage difference, and a predetermined current, and the test key transistor is configured to generate a current within a threshold difference from the predetermined current in the channel in response to receiving the preset gate voltage at the gate and the preset source-drain voltage difference at the source and the drain, and the deep trench isolation encroaches into the channel at a preset depth.
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公开(公告)号：US20210105429A1
公开(公告)日：2021-04-08
申请号：US17127128
申请日：2020-12-18
Applicant: CISTA SYSTEM CORP.
Inventor： Dennis Tunglin LEE , Guangbin ZHANG
Abstract: A system is provided for generating a ramping signal. The system includes a plurality of storage circuits each including an input and an output. The output of a previous storage circuit is connected to the input of a next storage circuit. The storage circuits are configured to propagate a first enable signal based on a first control signal. The system also includes a plurality of first current generating circuits. Each first current generating circuit is coupled to the output of a corresponding storage circuit to receive the propagated first enable signal. The first current generating circuits are configured to generate a first current signal based on the propagated first enable signal.
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Patent Agency Ranking
公开(公告)号：US20190208170A1
公开(公告)日：2019-07-04
申请号：US16352651
申请日：2019-03-13
Applicant: Cista System Corp.
Inventor： Hirofumi Komori , Dennis Tunglin Lee , Guangbin Zhang , Jingzhou Zhang
IPC: H04N9/04 , H04N5/3745 , H04N5/355 , H01L27/146 , G06T3/40 , H04N5/378
CPC classification number: H04N9/045 , G06T3/4015 , H01L27/14612 , H01L27/14621 , H01L27/14627 , H01L27/14636 , H01L27/14645 , H04N5/35563 , H04N5/37457 , H04N5/378
Abstract: A high dynamic range sensing device is disclosed. The device may comprise an array of Bayer-pattern units of color filters, each of the color filters corresponding to a pixel of the sensing device, and each of the color filters overlapping with a plurality of photodiodes.
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公开(公告)号：US09876045B2
公开(公告)日：2018-01-23
申请号：US15134181
申请日：2016-04-20
Applicant: CISTA SYSTEM CORP.
Inventor： Hirofumi Komori , Jingyi Bai
IPC: H01L27/146
CPC classification number: H01L27/1464 , H01L27/1461 , H01L27/14612 , H01L27/14621 , H01L27/14627 , H01L27/1463 , H01L27/14636 , H01L27/14643 , H01L27/14647 , H01L27/14685 , H01L27/14687 , H01L27/14689
Abstract: An image sensor including at least one pixel for collecting charge in its photodiode is provided. The image sensor comprises: a substrate having a first surface on a front side and a second surface on a back side, a photodetector formed in the silicon substrate and having a light-receiving surface on the second surface, and a first layer with positive charges disposed on the second surface, the first layer being configured to form an electron accumulation region at the light-receiving surface of the photodetector for suppressing a dark current at a back side interface of the image sensor. A method for fabricating an image sensor including a first layer with positive charges is also provided.
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公开(公告)号：US20160329367A1
公开(公告)日：2016-11-10
申请号：US15134181
申请日：2016-04-20
Applicant: CISTA SYSTEM CORP.
Inventor： HIROFUMI KOMORI , JINGYI BAI
IPC: H01L27/146
CPC classification number: H01L27/1464 , H01L27/1461 , H01L27/14612 , H01L27/14621 , H01L27/14627 , H01L27/1463 , H01L27/14636 , H01L27/14643 , H01L27/14647 , H01L27/14685 , H01L27/14687 , H01L27/14689
Abstract: An image sensor including at least one pixel for collecting charge in its photodiode is provided. The image sensor comprises: a substrate having a first surface on a front side and a second surface on a back side, a photodetector formed in the silicon substrate and having a light-receiving surface on the second surface, and a first layer with positive charges disposed on the second surface, the first layer being configured to form an electron accumulation region at the light-receiving surface of the photodetector for suppressing a dark current at a back side interface of the image sensor. A method for fabricating an image sensor including a first layer with positive charges is also provided.
Abstract translation: 提供了包括用于在其光电二极管中收集电荷的至少一个像素的图像传感器。 图像传感器包括：具有前侧的第一表面和背面的第二表面的基板，形成在硅基板中并且在第二表面上具有光接收表面的光电检测器，以及具有正电荷的第一层 设置在第二表面上，第一层被配置为在光电检测器的光接收表面处形成电子存储区域，用于抑制图像传感器的背面界面处的暗电流。 还提供了一种用于制造包括具有正电荷的第一层的图像传感器的方法。
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公开(公告)号：US12244943B2
公开(公告)日：2025-03-04
申请号：US18195208
申请日：2023-05-09
Applicant: CISTA SYSTEM CORP.
Inventor： Yang-Ting Chou , Zhaojian Li
Abstract: This application describes method and apparatus for HDR+ using M×N-cell sensors. An example apparatus includes a plurality of pixel groups, each pixel group having M×N pixels configured with color filters of a same color such that the M×N pixels in each pixel group capture a same color. M and N are integers greater than one, and each pixel is represented by a first number of bits. The example apparatus further include one or more processors configured to: capture, through the plurality of pixel groups, a plurality of frames of a scene using a short-exposure setting; merge the plurality of frames into an HDR image; and perform tone mapping on the HDR image to reduce a dynamic range of the super-pixels of the HDR image into a low dynamic range (LDR) image, wherein each pixel in the LDR image is represented with the first number of bits.
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公开(公告)号：US12217433B2
公开(公告)日：2025-02-04
申请号：US17940891
申请日：2022-09-08
Applicant: CISTA SYSTEM CORP.
Inventor： Yang-Ting Chou , Zhaojian Li
IPC: G06T7/11 , G06T3/4015 , G06T5/20 , G06T7/90
Abstract: This application describes systems and methods for detecting depth in deep trench isolation with semiconductor devices using test key transistors. An method comprises: capturing, by an image sensor, an image; generating a plurality of chrominance channels by converting the image into luminance-chrominance space; performing homogeneous region segmentation on the plurality of chrominance channels to generate one or more regions of interest in the plurality of chrominance channels; and projecting the regions of interest onto eigen-illuminant images to determine gray color pixels on the image, wherein the eigen-illuminant images are generated via performing a machine learning algorithm on a training set of images captured by the image sensor.
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