Patent Number: 7,355,939

Title: System and method for switching control modes of spindle motor

Abstract: A system and method of switching the control modes of spindle motor are described. The switch system comprises a first control module, a second control module and a switch controller. The first control module electrically coupled to the spindle motor and the OPU controls the spindle motor to be operated in a present mode. The second control module is electrically coupled to the spindle motor to control the spindle motor to be operated in the transition mode between the present mode and the target mode. The switch controller electrically coupled to the first control module, the second control module and the spindle motor receives a present feedback signal associated with the rotation of spindle motor to generate a first switch signal. Furthermore, the switch controller receives a target indicative signal associated with the information on the optical storage medium to generate a second switch signal. The switch controller then switches the control mode of the spindle motor from the present mode to the transition mode in response to the first switch signal, and the switch controller switches the control mode of the spindle motor from the transition mode to the target mode in response to the second switch signal.

Inventors: Wu; Chang-long (Yi-Lan, TW), Tsai; Chao-long (Hsin-chu, TW)

Assignee: MEDIATEK Inc.

International Classification: G11B 5/09 (20060101)

Expiration Date: 2020-04-08 0:00:00