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, 2012
Filed:
Oct. 24, 2008
Applicant:
Nobuya Inamori, Yokkaichi, JP;
Inventor:
Nobuya Inamori, Yokkaichi, JP;
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05B 41/16 (2006.01);
U.S. Cl.
CPC ...
Abstract
A PWM control method increases/decreases a duty ratio of a PWM signal with a predetermined resolution so to control the duty ratio of the PWM signal in the case of a PWM control. The resolution of the duty ratio of the PWM signal is increased to make a high period in the duty ratio of the PWM signal longer than a rise time of the PWM signal if the high period is shorter than the rise time. The resolution of the duty ratio of the PWM signal is increased to make a low period in the duty ratio of the PWM signal longer than a fall time of the PWM signal if the low period is shorter than the fall time.