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:
Aug. 10, 2004
Filed:
Aug. 29, 2002
Mohammad H. Rahnavard, Rancho Palos Verdes, CA (US);
Mehrdad Zomorrodi, West Hills, CA (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A method for banding suppression due to vibration in an image forming and/or image receiving apparatus with laser driver utilizes governing equations which relate the on/off time and intensity to velocity and frequency of vibration are disclosed. Using derived formulas, an amplitude and frequency modulation (AM/FM) combination is used to suppress the banding due to vibration. The equation which governs the on/off time (FM) is t +e sin(2&pgr;ft )/v =t . This transcendental equation can be solved for the required on-time t in terms of the nominal on-time t , e (vibration amplitude), v (nominal velocity) and f (vibration frequency). The equation which governs the intensity is H (t)=v(t)/v . H (t) controls the level of irradiance. This method is further extended to multi-temporal vibration frequency and may correct banding due to irradiance modulation.