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. 22, 2008
Filed:
Aug. 22, 2006
Philip Jerome Heink, Lexington, KY (US);
Daniel Richard Klemer, Lexington, KY (US);
Stanley Coy Tungate, Jr., Lexington, KY (US);
Eric Wayne Westerfield, Versailles, KY (US);
Philip Jerome Heink, Lexington, KY (US);
Daniel Richard Klemer, Lexington, KY (US);
Stanley Coy Tungate, Jr., Lexington, KY (US);
Eric Wayne Westerfield, Versailles, KY (US);
Lexmark International, Inc., Lexington, KY (US);
Abstract
Laser driver systems and methods are provided for controlling a laser driver coupled to a suitable laser source. The laser driver comprises a plurality of current sources, including at least one bias current source and at least two switched current sources. To control the laser driver, a laser power control signal is provided for each switched current source that corresponds to a desired laser output power. An output power error measure is defined based upon an error between a measured laser output power and the desired laser output power for each switched current source and a control system is characterized in which the output power error measures combine to change a magnitude of each of the switched current sources and the bias current source(s) such that the output power error measures converge over time.