Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Utility Patent
1998-07-29
2001-01-02
Dinh, Tan (Department: 2752)
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
C369S075210
Utility Patent
active
06169711
ABSTRACT:
CLAIM OF PRIORITY
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. § 119 from an application for APPARATUS FOR CONTROLLING MOTION OF DISK TRAY AND PICKUP AND METHOD THEREFOR earlier filed in the Korean Industrial Property Office on Jul. 29, 1997 and there duly assigned Ser. No. 35782/1997.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an optical disk drive, and more particularly, to a technique for controlling the motion of a pickup and a disk tray of the optical disk drive.
2. Description of the Related Art
In general, the disk tray of a optical disk drive is installed such that the disk tray is able to be moved in and out in order to load a disk. Data is either recorded on the disk or reproduced therefrom into a deck in the disk drive. The disk tray carries the disk by being loaded into or ejected from the deck of the disk drive. Also, a pickup for reading information from the disk is installed in the disk drive such that the pickup can be moved radially on the disk.
In earlier apparatus for controlling the transfer of the disk tray of a disk drive, motors for transferring the disk tray and the pickup are separately installed, along with integrated circuit chips for controlling the motors. Accordingly, there are numerous parts in the disk drive, which increases the manufacturing cost of the disk drive.
The patents to Kim et al., Park, and Maeng, U.S. Pat. Nos. 5,572,497, 5,633,850, and 5,636,198, respectively entitled Single Motor Driving Device For A Mini-Disc Player, Optical Disc Player Having An Apparatus For Transferring Both A Disc Tray And An Optical Pickup, and Multi-Compact Disk Player, each discloses disk players utilizing a single motor for driving both the disk tray and a pickup. However, none of these three patents teaches or suggests the specifically recited technique for controlling the motion of a disk tray and pickup in accordance with the present invention.
The following additional patents each discloses features in common with the present invention but are not as pertinent as the patents discussed in detail above: U.S. Pat. No. 5,237,551 to Ogawa et al., entitled Apparatus Measuring An Output Of A Disk Drive, U.S. Pat. No. 5,253,235 to Isobe et al., entitled Disk Player Wherein A Plurality Of Compact Disks And A Laser Disk Are Rotated With A Single Motor, U.S. Pat. No. 5,386,403 to Morioka et al., entitled Single Motor Disk Loading Device With Lock Gear, U.S. Pat. No. 5,434,839 to Choi, entitled Disc Loading Apparatus For An Optical Disc Player Using A Single Motor For Horizontal And Vertical Movement Of The Disc Tray, U.S. Pat. No. 5,467,333 to Ji, entitled Tray And Disc Driving Mechanism For Laser Disc Player, U.S. Pat. No. 5,500,844 to Kim et al., entitled Device For Driving Minidisk Player, U.S. Pat. No. 5,504,729 to Ikedo et al., entitled Multi-Tray Disk Player With Selective Tray Latching, U.S. Pat. No. 5,563,857 to park, entitled Disc Changer Having A Single Driving Motor For Both A Tray And A Roulette, U.S. Pat. No. 5,673,244 to Choi, entitled Disk Loading And Magnetic Head Lifting Mechanism Using A Single Power Source For A Minidisk Player, U.S. Pat. No. 5,708,643 to Choi et al., entitled Multiple Focus Optical Pickup System For Alternatively Reading A Multiple Number Of Optical Disks, U.S. Pat. No. 5,768,240 to Hiraga, entitled Optical Disk Recording/Reproducing Apparatus, and U.S. Pat. No. 5,774,442 to Nakamichi, entitled Disk Transferring Device With A Single Motor For Moving A Disk Along First And Second Disk Guides From A First Position To A Second Position And For Separating The Disk Guides When The Disk Is In The Second Position.
SUMMARY OF THE INVENTION
To solve the above problem, one object of the present invention is to provide an apparatus for controlling the motion of a pickup and a disk tray of a optical disk drive using a single motor.
Another object of the present invention is to provide a method of controlling the motion of a pickup and a disk tray of a optical disk drive using a single motor.
In a disk tray transfer control apparatus to achieve one of the above objects, a disk tray position sensor comprises at least one switch which is turned on or off according to the position of the disk tray and which senses the position of the disk tray to output a logic value combination according to the position. A controller generates a motor control signal according to the logic value combination from the disk tray position sensor and an external input command. A motor moves a pickup or the disk tray according to the motor control signal. A combining unit selectively transmits the power of the motor to the pickup or the disk tray according to the rotation direction and rotation amount of the motor.
In order to achieve another one of the above objects, there is provided a disk tray transfer control method of a disk drive for moving a pickup and a disk tray by a single motor. First, a state mode is determined according to a logic value combination representing the position of the disk tray. Then, it is determined whether a disk tray loading/unloading command has been input. When the disk tray loading/unloading command has been input, the disk tray loading/unloading command is regarded as an unloading command if a current mode is the loading completion mode and as a loading command if the current mode is the open completion mode. The tray is moved in accordance with a driving voltage according to a predetermined timing chart while sensing the position of the disk tray.
REFERENCES:
patent: 4701901 (1987-10-01), Imai
patent: 5119357 (1992-06-01), Tsuruta et al.
patent: 5237551 (1993-08-01), Ogawa et al.
patent: 5253235 (1993-10-01), Isobe et al.
patent: 5386403 (1995-01-01), Morioka et al.
patent: 5434839 (1995-07-01), Choi
patent: 5467333 (1995-11-01), Ji
patent: 5500844 (1996-03-01), Kim et al.
patent: 5504729 (1996-04-01), Ikedo et al.
patent: 5563857 (1996-10-01), Park
patent: 5563865 (1996-10-01), Wheeler
patent: 5572497 (1996-11-01), Kim et al.
patent: 5633850 (1997-05-01), Park
patent: 5636198 (1997-06-01), Maeng
patent: 5673244 (1997-09-01), Choi
patent: 5708643 (1998-01-01), Choi et al.
patent: 5768240 (1998-06-01), Hiraga
patent: 5774442 (1998-06-01), Nakamichi
patent: 5892737 (1999-04-01), Park
patent: 5903527 (1999-05-01), Park
patent: 5903538 (1999-05-01), Fujita et al.
patent: 6005831 (1999-12-01), Park
patent: 61-203463 (1986-12-01), None
patent: 8-279221 (1996-10-01), None
patent: 9-91820 (1997-04-01), None
patent: 10-112106 (1998-04-01), None
patent: 97-17379A (1997-04-01), None
Bushnell , Esq. Robert E.
Dinh Tan
Samsung Electronics Co,. Ltd.
LandOfFree
Technique for controlling motion of disk tray and pickup does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Technique for controlling motion of disk tray and pickup, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Technique for controlling motion of disk tray and pickup will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2519025