公开(公告)号：US20230412934A1

公开(公告)日：2023-12-21

申请号：US18460743

申请日：2023-09-05

Applicant: TOPPAN Inc.

Inventor： Yu OOKUBO ,  Tomohiro NAKAGOME ,  Kunihiro HATAKEYAMA ,  Hiroshige GOTO ,  Satoshi TAKAHASHI ,  Yasuyuki HITSUOKA

IPC: H04N25/20 ,  H04N25/62 ,  H04N25/77

CPC classification number: H04N25/20 ,  H04N25/62 ,  H04N25/77

Abstract: A range imaging device includes a light source unit that emits light pulses to a measurement space; a light-receiving unit including a photoelectric conversion element that generates charge according to light incident from the space, a pixel circuit including charge storage units in which the charge is integrated in a frame cycle, and a pixel drive circuit that performs switching operation of transfer transistors to distribute the charge to the storage units for integration at integration timing synchronizing with emission of the pulses; and a distance calculation unit that calculates a distance between object in the space and the light-receiving unit based on charge determined by a first charge integrated in each storage unit. The calculation unit calculates the distance by subtracting a second charge from each first charge, the second charge being noise charge as an integrated charge other than the charge distributed and integrated by the switching operation.

公开(公告)号：US20230367018A1

公开(公告)日：2023-11-16

申请号：US18357546

申请日：2023-07-24

Applicant: TOPPAN Inc.

Inventor： Tomohiro NAKAGOME ,  Yu OOKUBO ,  Satoshi TAKAHASHI ,  Hiroshige GOTO

IPC: G01S17/894 ,  G01S7/4865 ,  G01S17/10

CPC classification number: G01S17/894 ,  G01S7/4865 ,  G01S17/10

Abstract: A range imaging device includes a light source unit, a light-receiving unit, and a range image processing unit that computes a distance to an object. The range image processing unit performs multiple measurements different in relative timing relationship between an emission timing and an accumulation timing, extracts a feature amount based on the amounts of charge accumulated at the measurements, determines whether reflection light of a light pulse has been received by pixels in a single path or via multipath propagation, based on tendency of the extracted feature amount, and calculates the distance to the object present in a measurement space in accordance with a result of the determination.

公开(公告)号：US20230014856A1

公开(公告)日：2023-01-19

申请号：US17935336

申请日：2022-09-26

Applicant: TOPPAN Inc.

Inventor： Hiroshige GOTO

IPC: H01L27/146 ,  H04N5/3745 ,  H04N5/357

Abstract: A solid-state image sensor includes a first semiconductor, and a second semiconductor having a composition different from that of the first composition and electrically connected to the first semiconductor. The first semiconductor includes a photodiode that converts light incident on the photodiode into charge carriers, first carrier storages that store the charge carriers, and a transfer gate that controls transfer the charge carriers to a selected one of the first carrier storages. The second semiconductor includes second carrier storages and a potential detection node. The second carrier storages each store charge carriers based on the charge carriers stored in a corresponding one of the first carrier storages. The potential detection node detects the electric potential of each of the second carrier storages. The solid-state image sensor further includes a reset transistor that resets the electric potential of each of the first carrier storages to a predetermined electric potential.