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:
Jun. 16, 2015
Filed:
Feb. 26, 2014
Canon Kabushiki Kaisha, Tokyo, JP;
Masanori Shibata, Inagi, JP;
Yoshikazu Yamazaki, Sagamihara, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
A light-emitting element driving apparatus comprising a light-emitting element, a driving unit including a control terminal for driving the light-emitting element based on a potential of the control terminal, and a controlling unit including a voltage holding unit, wherein the controlling unit controls the potential of the control terminal such that an emitted light amount approaches a target value and causes the voltage holding unit to hold a voltage corresponding to the potential of the control terminal, when the light-emitting element is in an emitting state, controls the potential of the control terminal to inactivate the driving unit, when setting the light-emitting element in a non-emitting state, and controls the potential of the control terminal by using the voltage of the voltage holding unit, when setting the light-emitting element in the emitting state again.