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. 02, 2007
Filed:
Apr. 08, 2004
Reiji Hattori, Meihamamachi, Nishi-ku, Fukuoka-shi, Fukuoka 819-0004, JP;
Reiji Hattori, Meihamamachi, Nishi-ku, Fukuoka-shi, Fukuoka 819-0004, JP;
Casio Computer Co., Ltd., Tokyo, JP;
Other;
Abstract
A driving device which supplies a current to a plurality of current-driven optical elements to drive the optical elements includes at least a driving current supply circuit which supplies a driving current to each optical element for a predetermined period, and a control voltage applying circuit which applies a charge voltage having a voltage value corresponding to a voltage to be applied to each optical element using the driving current, before the driving current is supplied. The driving current supply circuit includes a single constant current generating circuit which outputs a constant current having the same current value as that of a driving current, and a plurality of current storage circuits which sequentially receive and hold the constant current and output the driving current on the basis of the constant current.