公开(公告)号：US11019286B2

公开(公告)日：2021-05-25

申请号：US16439354

申请日：2019-06-12

Applicant: SAMSUNG ELECTRONICS CO., LTD.

Inventor： Hee Sung Shim ,  Kyung Ha Kim ,  Mi Ra Lee ,  Woong Joo

IPC: H04N5/341 ,  H04N5/353 ,  H04N5/378 ,  H01L27/146

Abstract: A pixel driving circuit of an image sensor includes a first transistor to transmit an output signal of the photodiode to a floating diffusion node, a second transistor to reset a voltage of the floating diffusion node to a pixel voltage, a third transistor to output charges in the floating diffusion node, a fourth transistor to pre-charge an output node of the third transistor, a fifth transistor to transmit the charges in the floating diffusion node to a first node, a sixth transistor to transmit the pixel voltage to a second node, a seventh transistor to output charges in the second node, an eighth transistor to output an output signal of the seventh transistor to a column line, and a ninth transistor to output an output signal of the third transistor to the column line.

公开(公告)号：US10389956B2

公开(公告)日：2019-08-20

申请号：US15873057

申请日：2018-01-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Moo Young Kim ,  Kyoung Min Koh ,  Woong Joo ,  Mi Ra Lee

IPC: H04N5/378 ,  H04N5/357 ,  H04N5/372 ,  H04N5/3745

Abstract: Provided are image sensors. An image sensor includes a pixel array comprising pixels configured to output signal voltages, each of the pixels comprising first and second photodiodes, first and second transfer transistors connected to the first and second photodiodes, respectively, and a floating diffusion node to which the first and second transfer transistors are connected; a ramp voltage generator configured to generate a ramp voltage that decreases with a slope according to a ramp clock to have a first gain; a correlation double sampler (CDS) configured to compare the ramp voltage with the signal voltages to output a comparison signal; a counter configured to count the comparison signal according to a counter clock to output a digital signal; and a digital scaling unit configured to scale the digital signal to have a second gain.

公开(公告)号：US20180205897A1

公开(公告)日：2018-07-19

申请号：US15873057

申请日：2018-01-17

Applicant: Samsung Electronics Co., Ltd.

Inventor： Moo Young KIM ,  Kyoung Min Koh ,  Woong Joo ,  Mi Ra Lee

IPC: H04N5/357 ,  H04N5/378 ,  H04N5/372

CPC classification number: H04N5/3575 ,  H04N5/37213 ,  H04N5/37457 ,  H04N5/378

Abstract: Provided are image sensors. An image sensor includes a pixel array comprising pixels configured to output signal voltages, each of the pixels comprising first and second photodiodes, first and second transfer transistors connected to the first and second photodiodes, respectively, and a floating diffusion node to which the first and second transfer transistors are connected; a ramp voltage generator configured to generate a ramp voltage that decreases with a slope according to a ramp clock to have a first gain; a correlation double sampler (CDS) configured to compare the ramp voltage with the signal voltages to output a comparison signal; a counter configured to count the comparison signal according to a counter clock to output a digital signal; and a digital scaling unit configured to scale the digital signal to have a second gain.