公开(公告)号：US11647308B2

公开(公告)日：2023-05-09

申请号：US17574181

申请日：2022-01-12

Applicant: SK hynix Inc.

Inventor： Jin Uk Jeon ,  Oh Jun Kwon ,  Jin Seon Kim ,  Hak Soon Kim ,  Han Sang Kim ,  Kang Bong Seo ,  Sung Uk Seo ,  Jeong Eun Song ,  Min Seok Shin ,  Sun Young Lee ,  Eun Chang Lee ,  Hoo Chan Lee

IPC: H04N5/3745 ,  H04N5/378 ,  H03M1/56

CPC classification number: H04N5/378 ,  H03M1/56 ,  H04N5/37455

Abstract: An analog-to-digital converting circuit includes: an analog-to-digital converter suitable for performing an analog-to-digital conversion on pixel signals of a plurality of pixels provided in a pixel array; a ramp signal generator suitable for providing a ramp signal to the analog-to-digital converter; and an auto-zero controller suitable for providing a reference voltage to the analog-to-digital converter to perform an auto-zeroing operation by using a row pixel for which a readout operation is performed by the analog-to-digital converter.

公开(公告)号：US11258969B1

公开(公告)日：2022-02-22

申请号：US17345597

申请日：2021-06-11

Applicant: SK hynix Inc.

Inventor： Min Seok Shin ,  Hak Soon Kim ,  Han Sang Kim ,  Kang Bong Seo

IPC: H04N5/369 ,  H04N5/376 ,  H04N13/271

Abstract: An image sensor includes: first lines transferring a first clock having the same phase as that of modulated light in a first phase and a third clock having a phase difference of a ½ cycle from the phase of the modulated light in a second phase; second lines transferring the third clock in the first phase and the first clock in the second phase; third lines transferring a second clock having a phase difference of a ¼ cycle from the phase of the modulated light in the first phase and a fourth clock having a phase difference of a ¾ cycle from the phase of the modulated light in the second phase; fourth lines transferring the fourth clock in the first phase and the second clock in the second phase; and a pixel array including first pixels and second pixels that are alternately arranged in row and column directions.

公开(公告)号：US11675079B2

公开(公告)日：2023-06-13

申请号：US17324635

申请日：2021-05-19

Applicant: SK hynix Inc.

Inventor： Hak Soon Kim ,  Han Sang Kim ,  Jeong Eun Song ,  Min Seok Shin

IPC: G01S17/36 ,  G06T7/521 ,  G01S7/4911 ,  G01S17/894 ,  H04N25/705

CPC classification number: G01S17/36 ,  G01S7/4911 ,  G01S17/894 ,  G06T7/521 ,  H04N25/705

Abstract: An image sensing device includes an optical emitter outputting a modulated signal to a target object; an optical receiver generating, according to a phase control signal, pixel signals corresponding to a reflected signal from the target object; an image processor calculating a depth phase based on the pixel signals and compensating for the depth phase according to a phase offset signal to output a depth information signal; a driving control circuit generating the phase control signal corresponding to a phase of the modulated signal and setting an initial phase difference between the modulated signal and the phase control signal according to the phase offset signal; and an offset calculating circuit setting a plurality of reference phases, selecting a reference phase closest to the depth phase among the set reference phases and generating the phase offset signal representing a phase difference between the selected reference phase and the depth phase.