公开(公告)号：US11729885B2

公开(公告)日：2023-08-15

申请号：US17637487

申请日：2020-10-22

Applicant: HAMAMATSU PHOTONICS K.K.

Inventor： Yuya Iwazaki ,  Sena Tsutsumi

IPC: H05B45/46 ,  H05B45/52 ,  H01S5/02

CPC classification number: H05B45/46 ,  H05B45/52

Abstract: The present disclosure relates to a driving circuit individually performing drive control of light-emitting elements having cathodes with the same potential. The driving circuit includes driving circuit units provided in one-to-one correspondence with the light-emitting elements. Each driving circuit unit includes a switching element, a first energy-storage element, a current-control element, and a current-interrupting element. The current-control element connects in parallel to the semiconductor light-emitting element. In the first energy-storage element, a first electrode connects to a first node, and a second electrode connects to a first constant-potential line. In the switching element, a first current terminal connects to a second electrode, and a second current terminal connects to a second node. The second nodes connect to the second constant-potential line without short-circuiting each other by the current-interrupting element. The current-interrupting element interrupts or suppresses current during a period in which the switching element is in ON-state.