公开(公告)号：US20220159803A1

公开(公告)日：2022-05-19

申请号：US17440512

申请日：2020-03-18

Applicant: NICHIA CORPORATION

Inventor： Kana MORI ,  Satoshi YOSHINAGA

IPC: H05B45/30 ,  H01L33/50

Abstract: A method of driving a light-emitting device includes driving the light-emitting device having a light-emitting element and a light-emitting part that contains two or more types of phosphors adapted to be excited by light emitted from the light-emitting element, the two or more types of phosphors having respectively different afterglow characteristics. The driving of the light-emitting device includes supplying a current to the light-emitting element during a conducting period including a maximum current supply period in which a maximum current in the conducting period is supplied to the light-emitting element, and subsequent to the maximum current supply period, a current reduction period in which the current supplied to the light-emitting element is reduced continuously or stepwise from the maximum current.