公开(公告)号：US09971046B2

公开(公告)日：2018-05-15

申请号：US14969089

申请日：2015-12-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takuya Ryu ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Atsushi Iwashita ,  Eriko Sato ,  Hideyuki Okada ,  Kosuke Terui

IPC: G01T1/24 ,  H04N5/32

CPC classification number: G01T1/247 ,  H04N5/32

Abstract: A radiation imaging system for performing a plurality of times of radiation imaging is provided. A readout circuit generates a value corresponding to a signal read out from each pixel. A control unit causes the readout circuit to generate a first pixel value corresponding to a signal read out from each pixel, and a first offset value of the readout circuit before starting the plurality of times of radiation imaging. The control unit causes the readout circuit to generate a second pixel value corresponding to a signal read out from each pixel, and a second offset value of the readout circuit during a plurality of times of radiation imaging. A correction unit corrects the second pixel value by using the first pixel value, the first offset value, and the second offset value.

公开(公告)号：US20180129120A1

公开(公告)日：2018-05-10

申请号：US15561122

申请日：2016-05-27

Applicant: CANON KABUSHIKI KAISHA

Inventor： Eriko Sato ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Hideyuki Okada ,  Takuya Ryu

IPC: G03B7/08 ,  A61B6/00 ,  G03B42/02 ,  G01T1/17

Abstract: A radiation imaging apparatus that includes a plurality of sensors, a readout unit and a control unit, wherein the control unit performs a first control of reading out signals from sensors after radiation irradiation is started, and a second control of outputting a control signal to end the radiation irradiation when a calculated value calculated based on an output of the readout unit in the first control reaches a reference value, and the control unit, in the first control, reads out the signals from the sensors by changing a signal amplification ratio of the readout unit such that a value of an output of the readout unit is not saturated, and, in the second control, calculates the calculated value by accumulating the output of the readout unit in consideration of the signal amplification ratio.

公开(公告)号：US09462989B2

公开(公告)日：2016-10-11

申请号：US14138918

申请日：2013-12-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuro Takenaka ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Sho Sato ,  Atsushi Iwashita ,  Eriko Sato ,  Hideyuki Okada ,  Takuya Ryu

IPC: A61B6/00 ,  H05G1/38 ,  H04N5/32

CPC classification number: A61B6/542 ,  A61B6/42 ,  H04N5/32 ,  H05G1/38

Abstract: An imaging apparatus has an AEC function that can prevent irregularities in photographed images, without being increased in size. The imaging apparatus comprises a plurality of pixels arranged in a matrix shape, each of the plurality of pixels including a conversion element for converting radiation or light into an electric charge, a plurality of lines that are connected to the plurality of pixel units and that extend in different directions to each other, a current monitor circuit that monitors currents flowing in the plurality of lines, and an arithmetic unit that calculates a two-dimensional distribution by performing back-projection processing with respect to the currents flowing in the plurality of lines monitored by the current monitor circuit.

Abstract translation: 成像装置具有能够防止拍摄图像中的不规则性而不增加尺寸的AEC功能。 成像装置包括以矩阵形状排列的多个像素，所述多个像素中的每一个包括用于将辐射或光转换成电荷的转换元件，连接到所述多个像素单元并且延伸的多条线 在彼此不同的方向上，监视在多条线路中流动的电流的电流监视电路，以及运算单元，该运算单元通过对在所监视的多条线路中流动的电流进行反向投影处理来计算二维分布 由电流监视电路。

公开(公告)号：US20160291170A1

公开(公告)日：2016-10-06

申请号：US15037632

申请日：2014-10-30

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuro Takenaka ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Atsushi Iwashita ,  Eriko Sato ,  Hideyuki Okada ,  Takuya Ryu ,  Kosuke Terui ,  Takashi Takasaki

IPC: G01T1/20 ,  H01L27/146

CPC classification number: G01T1/2006 ,  G01T1/2018 ,  H01L27/14603 ,  H01L27/14607 ,  H01L27/14625 ,  H01L27/14636 ,  H01L27/14663 ,  H04N5/32

Abstract: A radiographic image capturing apparatus includes: a pixel array in which a plurality of pixels outputting an electrical signal corresponding to radiation are arranged; a readout circuit section; and a member for preventing radiation from entering the readout circuit section. The pixel array includes a first region in which some pixels used for generating image signals are arranged, and a second region in which other pixels not used for generating the image signals are arranged in at least part of a region around the first region. From an outer side toward an inner side of the pixel array, an end on the inner side of the readout circuit section disposed in the second region, an end on the inner side of an orthogonal projection of the member to the pixel array, and an end on the inner side of the second region are arranged in this order.

Abstract translation: 放射线照相图像拍摄装置包括：排列输出对应于辐射的电信号的多个像素的像素阵列; 读出电路部; 以及用于防止辐射进入读出电路部分的部件。 像素阵列包括其中布置用于产生图像信号的一些像素的第一区域，以及其中不用于生成图像信号的其他像素布置在第一区域周围的区域的至少一部分中的第二区域。 从像素阵列的外侧到内侧，设置在第二区域中的读出电路部分的内侧的端部，该部件与像素阵列的正交投影的内侧的端部，以及 在第二区域的内侧的端部以该顺序排列。

公开(公告)号：US20160178764A1

公开(公告)日：2016-06-23

申请号：US14969089

申请日：2015-12-15

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takuya Ryu ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Atsushi Iwashita ,  Eriko Sato ,  Hideyuki Okada ,  Kosuke Terui

IPC: G01T1/24

CPC classification number: G01T1/247 ,  H04N5/32

Abstract: A radiation imaging system for performing a plurality of times of radiation imaging is provided. A readout circuit generates a value corresponding to a signal read out from each pixel. A control unit causes the readout circuit to generate a first pixel value corresponding to a signal read out from each pixel, and a first offset value of the readout circuit before starting the plurality of times of radiation imaging. The control unit causes the readout circuit to generate a second pixel value corresponding to a signal read out from each pixel, and a second offset value of the readout circuit during a plurality of times of radiation imaging. A correction unit corrects the second pixel value by using the first pixel value, the first offset value, and the second offset value.

Abstract translation: 提供了一种用于执行多次放射成像的放射线成像系统。 读出电路产生对应于从每个像素读出的信号的值。 控制单元使得读出电路产生对应于从每个像素读出的信号的第一像素值，以及在开始多次放射成像之前读出电路的第一偏移值。 控制单元使得读出电路产生对应于从每个像素读出的信号的第二像素值，以及在多次放射成像期间产生读出电路的第二偏移值。 校正单元通过使用第一像素值，第一偏移值和第二偏移值来校正第二像素值。

公开(公告)号：US20150279882A1

公开(公告)日：2015-10-01

申请号：US14665045

申请日：2015-03-23

Applicant: CANON KABUSHIKI KAISHA

Inventor： Tomoyuki Yagi ,  Toshio Kameshima ,  Katsuro Takenaka ,  Sho Sato ,  Hideyuki Okada ,  Atsushi Iwashita ,  Eriko Sato ,  Takuya Ryu

IPC: H01L27/146 ,  H04N5/3745 ,  H04N5/376 ,  H04N5/341 ,  H04N5/365

CPC classification number: H01L27/14609 ,  G01T1/17 ,  H04N5/32 ,  H04N5/341 ,  H04N5/3575 ,  H04N5/363 ,  H04N5/3651 ,  H04N5/3658 ,  H04N5/3745 ,  H04N5/3765 ,  H04N5/378

Abstract: An imaging apparatus includes a pixel that generates charge; an integral amplifier that integrates charge transferred from the pixel; a low pass filter to which output of the integral amplifier is supplied and whose time constant is variable; first and second sample-and-hold circuits that sample and hold output of the low pass filter before and after the charge is transferred from the pixel to the integral amplifier, respectively; a differential circuit that outputs a difference between signals held by the first and second sample-and-hold circuits; and a control circuit that changes the time constant. The control circuit decreases the time constant after the sampling by the first sample-and-hold circuit ends, and increases the time constant in the middle of the sampling by the second sample-and-hold circuit.

Abstract translation: 成像装置包括产生电荷的像素; 一个集成了从像素转移的电荷的积分放大器; 提供积分放大器的输出并且其时间常数可变的低通滤波器; 第一和第二采样和保持电路，分别在从像素传输到积分放大器之前和之后采样和保持低通滤波器的输出; 输出由第一和第二采样保持电路保持的信号之间的差的差分电路; 以及改变时间常数的控制电路。 控制电路在第一采样保持电路的采样结束之后，减小时间常数，并且通过第二采样保持电路增加采样中间的时间常数。

公开(公告)号：US20140284491A1

公开(公告)日：2014-09-25

申请号：US14218635

申请日：2014-03-18

Applicant: CANON KABUSHIKI KAISHA

Inventor： Sho Sato ,  Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Hideyuki Okada ,  Atsushi Iwashita ,  Eriko Sato ,  Takuya Ryu

IPC: G01T1/17

CPC classification number: H04N5/361 ,  G01T1/17 ,  G01T1/247 ,  H04N5/32 ,  H04N5/367

Abstract: A radiation image pickup system includes a correction coefficient calculation unit that calculates a correction coefficient using pixel output values of a plurality of pixels, and a correction unit that corrects pixel output values of a plurality of pixels using the correction coefficient. A drive control unit repeatedly resets an electric charge caused by a dark current of a plurality of pixels until a detection unit detects a start of radiation exposure. The reset operation is performed simultaneously for n rows that are not adjacent to each other, where n is an integer equal to or greater than 2. The correction coefficient calculation unit calculates the correction coefficient using pixel output values of pixels in a row subjected to the reset operation in a period from a start of radiation exposure to a start detection time and pixel output values of pixels in an adjacent row.

Abstract translation: 放射线摄像系统包括校正系数计算单元，该校正系数计算单元使用多个像素的像素输出值来计算校正系数，以及校正单元，其使用校正系数校正多个像素的像素输出值。 驱动控制单元重复地复位由多个像素的暗电流引起的电荷，直到检测单元检测到曝光开始。 对于彼此不相邻的n行同时执行复位操作，其中n是等于或大于2的整数。校正系数计算单元使用经过该行的行中的像素的像素输出值来计算校正系数 在从曝光开始到起始检测时间的周期内的相邻行中的像素的像素输出值的复位动作。

公开(公告)号：US20140264060A1

公开(公告)日：2014-09-18

申请号：US14207008

申请日：2014-03-12

Applicant: Canon Kabushiki Kaisha

Inventor： Toshio Kameshima ,  Tomoyuki Yagi ,  Katsuro Takenaka ,  Sho Sato ,  Atsushi Iwashita ,  Eriko Sato ,  Hideyuki Okada ,  Takuya Ryu ,  Kosuke Terui

IPC: G01T1/16

CPC classification number: G01T1/247 ,  H01L27/146 ,  H04N5/32

Abstract: A radiation image pickup apparatus includes a pixel array including a plurality of pixels arranged in a matrix and configured to convert a radiant ray into electric signals, signal processors configured to output digital signals obtained in accordance with the electric signals output from the pixel array in parallel, and a controller configured to operate the signal processors after the signal processors enter a second power consumption state in which power consumption is higher than that of a first power consumption state from the first power consumption state after irradiation of a radiant ray to the pixel array is terminated, and to cause the signal processors to output digital signals after the signal processors are operated.

Abstract translation: 一种放射线图像拾取装置，包括：像素阵列，包括以矩阵排列并被配置为将辐射线转换为电信号的多个像素;信号处理器，被配置为输出根据从像素阵列并行输出的电信号获得的数字信号 以及控制器，被配置为在所述信号处理器进入第二功耗状态之后操作所述信号处理器，在所述第二功耗状态中，从辐射线照射到所述像素阵列之后的所述第一功耗状态的功耗高于所述第一功耗状态的功耗 并且在信号处理器被操作之后使信号处理器输出数字信号。

公开(公告)号：US11630220B2

公开(公告)日：2023-04-18

申请号：US17808170

申请日：2022-06-22

Applicant: CANON KABUSHIKI KAISHA

Inventor： Takuya Ryu ,  Kentaro Fujiyoshi ,  Ryosuke Miura

IPC: H04N25/68 ,  G01T1/20

Abstract: A radiation imaging apparatus includes pixels arranged to form pixel rows and pixel columns. The pixels include first pixels and second pixels whose sensitivity to radiation is lower than the first pixels. The apparatus further includes a signal lines arranged to correspond to the pixel columns, a readout circuit configured to read out a signal from the pixels via the signal lines, and a processing unit configured to decide a correction value using signals read out from the second pixels and correct signals read out from the first pixels using the correction value. An internal structure of the readout circuit has a period. The second pixels are arranged such that there are two or more types of remainders of column numbers of pixel columns that include the second pixels divided by the period.

公开(公告)号：US20190038250A1

公开(公告)日：2019-02-07

申请号：US15757693

申请日：2016-10-21

Applicant: CANON KABUSHIKI KAISHA

Inventor： Katsuro Takenaka ,  Tomoyuki Yagi ,  Takuya Ryu ,  Shinichi Takeda ,  Hideyuki Okada ,  Eriko Sato

IPC: A61B6/00 ,  H04N5/32 ,  G01T1/20 ,  G01T1/208 ,  H01L27/146

CPC classification number: A61B6/542 ,  A61B6/4233 ,  G01T1/2018 ,  G01T1/208 ,  H01L27/14612 ,  H01L27/14623 ,  H01L27/14636 ,  H01L27/14663 ,  H04N5/32 ,  H04N5/35563 ,  H04N5/361

Abstract: A radiation imaging apparatus, including a plurality of pixels, a plurality of column lines and a processor, the plurality of pixels including first pixels and second pixels configured to generate signals of different values by receiving radiation rays of equal irradiation rates, and the plurality of pixels being arrayed such that their numbers are different between a first column and a second column of the plurality of columns, wherein the processor, after radiation irradiation is started, obtains a first signal of the first column and a second signal of the second column while maintaining each pixel to an OFF state and performs AEC based on the first and second signals.