The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 24, 2023
Filed:
Mar. 18, 2020
Nichia Corporation, Anan, JP;
Kana Mori, Anan, JP;
Satoshi Yoshinaga, Tokushima, JP;
NICHIA CORPORATION, Anan, JP;
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.