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:
Jul. 29, 2025
Filed:
Feb. 10, 2020
Sony Semiconductor Solutions Corporation, Kanagawa, JP;
Takeshi Yuwaki, Kanagawa, JP;
Akihito Kamiegawa, Kanagawa, JP;
Katsuhisa Daio, Kanagawa, JP;
Hayato Kamizuru, Kanagawa, JP;
SONY SEMICONDUCTOR SOLUTIONS CORPORATION, Kanagawa, JP;
Abstract
Provided is a light-emission driving device that includes a light-emission current detection unit, a phase difference detection unit, and a delay unit. The light-emission current detection unit detects a light-emission current for causing a light-emitting element to emit light, the light-emission current being supplied from a light-emission driving unit. The phase difference detection unit detects a phase difference between the detected light-emission current and a drive signal for controlling the supply of the light-emission current in the light-emission driving unit. The delay unit adjusts propagation delay of the drive signal in accordance with the detected phase difference, and supplies the adjusted drive signal to the light-emission driving unit as a drive signal.