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:
Dec. 23, 1997
Filed:
Jun. 20, 1995
Dong-Jin Lee, Kwanmyeong, KR;
Samsung Electronics Co., Ltd., Kyungki-Do, KR;
Abstract
An apparatus and method for rapidly controlling the disk rotation by detecting a high speed rotation and a reverse rotation of a disk. The disk driving apparatus for controlling rotation of a disk in a normal mode includes a spindle motor for driving the rotation of the disk by a spindle control signal and for generating a spindle driving voltage as the disk rotates, a servo control for generating the spindle control signal of the spindle motor by a servo control signal, a device for converting the spindle driving voltage into digital data, a device for storing a rotation range data table of the spindle driving voltage corresponding to ah abnormal rotation of the disk, and a controller for comparing and analyzing the converted digital data with the rotation range data table, sensing normal and abnormal states, and generating the servo control signal from the sensed results. Upon sensing an abnormal state the controller generates the servo control signal applying a reverse torque to a rotation direction of the spindle motor during a predetermined time, and sequentially performs a stop mode and a normal driving mode.