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. 22, 2002
Filed:
Mar. 13, 1997
Applicant:
Inventor:
Ki-bong Yun, Anyang, KR;
Assignee:
Samsung Electronics Co., Ltd., Kyungki-Do, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B 2/300 ;
U.S. Cl.
CPC ...
G11B 2/300 ;
Abstract
A method for controlling the speed of a sled motor for an optical disk drive, wherein the sled motor is first driven according to a predetermined target velocity profile stored in a microcomputer. Then, a frequency of a sinusoidal wave output by a Hall-effect sensor is detected and it is determined whether the frequency of the sinusoidal wave is greater or smaller than a predetermined value. The target speed is incremented by a predetermined amount when the frequency of the sinusoidal wave is greater than the predetermined value, and is decremented by the predetermined amount when the frequency of the sinusoidal wave is smaller than the predetermined value.