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公开(公告)号：US12088948B2
公开(公告)日：2024-09-10
申请号：US18064585
申请日：2022-12-12
Applicant: Samsung Electronics Co., Ltd.
Inventor： Hyeokjong Lee
IPC: H04N25/78 , H03M7/16 , H04N25/616
CPC classification number: H04N25/78 , H03M7/16 , H04N25/616
Abstract: A gray code-to-binary code converter includes multiple parallel-in parallel-out (PIPO) latches, each of the multiple PIPO latches configured to output a parallel output gray code by latching a parallel input gray code in response to a sampling signal, and a parallel-in serial-out (PISO) circuit including a first group of switches, the PISO circuit configured to convert the parallel output gray code, which is latched in the multiple PIPO latches, into a binary code, and sequentially output bits of the binary code in units of bit, from a least significant bit (LSB) of the binary code to a most significant bit (MSB) of the binary code, while changing an arrangement of the first group of switches.
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公开(公告)号：US11716549B2
公开(公告)日：2023-08-01
申请号：US17459045
申请日：2021-08-27
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Yunhwan Jung , Hyeokjong Lee , Sunyool Kang , Kyungmin Kim , Yunhong Kim , Ingyeong Shin
IPC: H04N25/585 , H04N25/75 , H04N25/77 , H04N25/616 , H04N25/709 , H04N25/78
CPC classification number: H04N25/585 , H04N25/616 , H04N25/709 , H04N25/75 , H04N25/77 , H04N25/78
Abstract: An image sensor includes a pixel configured to operate in a high conversion gain (HCG) mode and a low conversion gain (LCG) mode during a readout period, and a correlated double sampling (CDS) circuit configured to generate a comparison signal based on a ramp signal and a pixel voltage received from the pixel, wherein the CDS circuit includes a comparator configured to: receive the pixel voltage through a first input node, receive the ramp signal through a second input node based on an LCG reset signal or an LCG image signal being received as the pixel voltage, and receive the ramp signal through a third input node based on an HCG reset signal or an HCG image signal being received as the pixel voltage; and compare the ramp signal to the pixel voltage, and output the comparison signal corresponding to a comparison result.
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Patent Agency Ranking
公开(公告)号：US11659295B2
公开(公告)日：2023-05-23
申请号：US17531877
申请日：2021-11-22
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Hyeokjong Lee
Abstract: An image sensor including: a plurality of phase shift code generators, wherein each of the plurality of phase shift code generators outputs a phase shift code; a. test data selection circuit for outputting test data corresponding to a test pattern; a counter for receiving the phase shift code from at least one of the plurality of phase shift code generators, receiving the test data from the test data selection circuit, latching a digital code corresponding to the test pattern using the phase shift code, and outputting the digital code; and a control logic for calculating a data pattern using the digital code and selecting one of the plurality of phase shift code generators in accordance with a result of a comparison between the data pattern and the test pattern.
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公开(公告)号：US11445141B2
公开(公告)日：2022-09-13
申请号：US17355443
申请日：2021-06-23
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Hyeokjong Lee , Yongsuk Choi
Abstract: A correlated double sampling (CDS) circuit, an operating method thereof, and an image sensor including the CDS circuit are disclosed. The CDS circuit includes a first comparator configured to operate based on a first bias current, and compare, with a ramp signal, a pixel voltage that is output from a pixel, during a first period and a fourth period during which the pixel operates in a low conversion gain (LCG) mode, a second comparator configured to operate based on a second bias current, and compare, with the ramp signal, the pixel voltage output from the pixel, during a second period and a third period during which the pixel operates in a high conversion gain (HCG) mode, the second period being after the first period, the third period being after the second period, and the fourth period being after the third period.
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公开(公告)号：US11212472B2
公开(公告)日：2021-12-28
申请号：US16743098
申请日：2020-01-15
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Hyeokjong Lee
Abstract: An image sensor including: a plurality of phase shift code generators, wherein each of the plurality of phase shift code generators outputs a phase shift code; a test data selection circuit for outputting test data corresponding to a test pattern; a counter for receiving the phase shift code from at least one of the plurality of phase shift code generators, receiving the test data from the test data selection circuit, latching a digital code corresponding to the test pattern using the phase shift code, and outputting the digital code; and a control logic for calculating a data pattern using the digital code and selecting one of the plurality of phase shift code generators in accordance with a result of a comparison between the data pattern and the test pattern.
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公开(公告)号：US10992309B1
公开(公告)日：2021-04-27
申请号：US16936851
申请日：2020-07-23
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Hyeokjong Lee
Abstract: An analog-to-digital converter for converting a pixel signal generated from sensed light into a digital signal includes a comparator configured to compare the pixel signal with a ramp signal having a constant slope to generate a comparison signal; a delay circuit configured to generate a first signal corresponding to the comparison signal, the delay circuit including a plurality of delay elements configured to generate a second signal by delaying the first signal by a first time period; and a compensator circuit configured to measure a period of the comparison signal to output a delay select signal to the delay circuit based on the measured period, the delay select signal delaying the first signal by the first time period, wherein the first time period is obtained by dividing the period of the comparison signal.
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公开(公告)号：US20150029372A1
公开(公告)日：2015-01-29
申请号：US14310065
申请日：2014-06-20
Applicant: Samsung Electronics Co., Ltd.
Inventor： Hyeokjong Lee , Jinho Seo , Seogheon Ham
IPC: H04N5/3745 , H03M1/36
Abstract: Provided is an image sensor including a sensor array including a plurality of pixels arranged in rows and columns. The image sensor may include a ramp signal generator which may generate a ramp signal. The intensity of the ramp signal may increase or decrease in response to a ramp enable signal. The image sensor may include an analog-digital converter electrically connected to one of the columns of the pixels. The analog-digital converter may be configured to compare an output signal from the one of the columns of the pixels with the ramp signal, thereby generating time information. The analog-digital converter may be configured to convert the time information to digital information in response to a counter enable signal. An activation of the counter enable signal may be delayed by a predetermined time delay, compared with that of the ramp enable signal.
Abstract translation: 提供了一种图像传感器，其包括具有排列成行和列的多个像素的传感器阵列。 图像传感器可以包括可产生斜坡信号的斜坡信号发生器。 斜坡信号的强度可以响应于斜坡使能信号而增加或减小。 图像传感器可以包括电连接到像素的列之一的模拟数字转换器。 模拟数字转换器可以被配置为将来自像素的列之一的输出信号与斜坡信号进行比较，从而产生时间信息。 模拟数字转换器可以被配置为响应于计数器使能信号将时间信息转换成数字信息。 与斜坡使能信号相比，可以将计数器使能信号的激活延迟预定的时间延迟。
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