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Title:
PWM制御方法及び装置、並びに、調光装置
Document Type and Number:
Japanese Patent JP4840328
Kind Code:
B2
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.

Inventors:
Inamori Shinya
Application Number:
JP2007277733A
Publication Date:
December 21, 2011
Filing Date:
October 25, 2007
Export Citation:
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Assignee:
SUMITOMO WIRING SYSTEMS,LTD.
International Classes:
H03K7/08; B60Q1/00; H05B37/02; H02M3/155
Domestic Patent References:
JP2004266930A
JP645895A
Attorney, Agent or Firm:
Etsushi Kotani
Takao Ito
Haruhiro Hirata



 
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