Device and method for compensating feed control amount
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorToshihiko Kaji
Life of this patent
Estimating the term…
Abstract
An optical pickup moves to the most inner circumference, then moves to outer circumference for a predetermined period and acquires address information there. Next, a difference XZ between the acquired address information and predetermined reference address information is calculated, and then difference YZ between address information which is acquired by performing above mentioned process in standard acceleration/deceleration control algorithm setting stage and the predetermined reference address information is calculated. Feed control amount is multiplied by a ratio between difference XZ and difference YZ.
Claims22
A feed control device for use with a feed motor which is used to move an optical disk pickup,
- said feed control device comprising:
- measuring means for measuring movement of said optical disk pickup;
- and compensation means for effecting a feed control amount to effect operation of said feed motor based on a result of a comparison between said measured movement and a predetermined reference value.
A feed control device for use with an optical disk pickup which is used with an optical disk, said feed control device comprising:
- a feed to which said optical disk pickup is fixed;
- a feed motor for driving said feed;
- a driver for transmitting a feed control amount to said motor for moving said feed;
- and
- a central processing unit for providing said feed control amount based on address information read from said optical disk, for
- measuring movement of said feed, for comparing said measured movement with predetermined reference value, and for effecting said feed control amount based on a result of the comparison.
A feed control device for use with an optical pickup which is used with an optical disk, said feed control device comprises:
- a feed to which said optical pickup is fixed;
- a feed motor for driving said feed;
- a central processing unit for providing feed control amount for controlling said feed based on address information read from said optical disk;
- and
- a driver for giving said feed control amount to said motor for moving said feed,
- wherein, at startup, a predetermined reference feed control amount is effected using a ratio between an address information acquired from said optical disk by moving said feed for a predetermined period and a predetermined reference address information, as a compensation value.
A feed control device for use with an optical disk pickup which is used with an optical disk, said feed control device comprising:
- a feed to which said optical pickup is fixed;
- a feed motor for driving said feed;
- a central processing unit for providing feed control amount based on address information read from said optical disk;
- a driver for giving feed control amount to said motor for moving said feed;
- wherein, at startup, said feed moves based on a predetermined feed control amount and acquires address information there and then the acquired address information is compared with a predetermined reference address information, then the predetermined reference feed control amount is effected based on the comparison result.
A feed control device for compensating feed control amount for controlling movement operation of a feed which an optical pickup is fixed to, said feed control device comprising:
- a driver for driving said feed;
- and
- a central processing unit for transmitting a feed control amount to said driver,
- so that:
- said optical pickup is moved to the most inner circumference position of said optical disk, and then said optical pickup is moved to outer circumferential direction for predetermined period and acquiring address information from said optical disk at that point;
- difference XZ between said acquired address information and a predetermined reference address information is calculated;
- difference YZ between address information acquired by performing standard acceleration/deceleration control algorithm at setting stage and said predetermined reference address information is calculated;
- and
- said feed control amount is compensated by multiplying ratio between said difference XZ and said difference YZ.
A method for compensating feed control amount for controlling driving of a feed, which optical pickup is fixed to, driven by a feed motor, comprising the steps of:
- measuring movement of said feed;
- comparing measured movement with a predetermined reference value;
- and
- compensating a reference feed control amount effecting movement of said feed according to the result of the comparison.
A method for compensating feed control amount for controlling driving of a feed to which optical pickup is fixed, said method comprising the steps of:
- moving said optical pickup to the most inner circumference position of a optical disk;
- moving said optical pickup to outer circumferential direction for a predetermined period and acquiring address information at this point;
- calculating difference XZ between said acquired address information and a predetermined reference address information;
- calculating difference YZ between address information acquired by performing standard acceleration/deceleration control algorithm at setting stage and said predetermined reference address information is calculated;
- and
- multiplying a ratio between said difference XZ and said difference YZ by said feed control amount.
Dependencies are inferred from the claim text.