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.