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:
Jan. 01, 2019
Filed:
Jan. 12, 2012
Norimasa Furukawa, Tokyo, JP;
Norimasa Furukawa, Tokyo, JP;
Sony Corporation, , JP;
Abstract
Disclosed herein is a light emitting element driving circuit including: a capacitive element; a current limiting section limiting a charging current for the capacitive element; a first constant current source stabilizing a discharging current supplied from the capacitive element to a light emitting element; and a switch controlling ON and OFF in supplying the discharging current to the light emitting element. The capacitive element is charged with electricity from the power source circuit in the preceding stage through the current limiting section. Also, the electric charges in the capacitive element are discharged in the form of a given discharging current for the discharging time period, and the light emitting element emits light in accordance with the given discharging current. In this case, the charging current for the capacitive element is limited by the current limiting section in such a way that the current value thereof becomes small.