公开(公告)号：US20200381886A1

公开(公告)日：2020-12-03

申请号：US16867128

申请日：2020-05-05

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Hirofumi KONISHI ,  Shigeaki YAMASAKI ,  Erika KAWABATA ,  Yoshiharu NAGATANI ,  Hiroshi KITANO

IPC: H01S3/10 ,  H01S3/13 ,  H01S5/026 ,  H01S5/06

Abstract: A light source device according to an embodiment is used with a light guide member and a wavelength converting member, and includes a light-emitting element, a light sensor, and a driving unit. The light-emitting element radiates a light beam to be incident on a first end of the light guide member by being supplied with a drive current. The light sensor detects signal light, which has been incident on a second end of the light guide member and transmitted to the first end. The driving unit supplies the drive current to the light-emitting element and controls the drive current based on a result of detection of the signal light.