CN101477804B

CN101477804B - Cylindrical optical disc driver

Info

Publication number: CN101477804B
Application number: CN2008102300043A
Authority: CN
Inventors: 王维; 马志新; 王烽力
Original assignee: Shenyang University of Technology
Current assignee: Shenyang University of Technology
Priority date: 2008-12-22
Filing date: 2008-12-22
Publication date: 2011-11-09
Anticipated expiration: 2028-12-22
Also published as: CN101477804A

Abstract

The invention discloses an optical disk and an optical disk driving device. The optical disk is rectangle; guide holes are formed on the edges of two corresponding sides; the optical disk of thinner width can be coiled into a cylinder shape. On the optical disk which is coiled into the cylinder shape, a data record track is a thread line; 4 channels or 8 channels of data record tracks are arranged in each thread line. 4 channels or 8 channels of laser reading and writing devices are integrated by a laser head component, can read and write 4 channels or 8 channels of data along the thread line at the same time. The optical disk driving device comprises a casing, a laser head component, a main shaft motor, a cylindrical roller rack and a control circuit. When the optical disk is inserted, the control circuit starts the main shaft motor automatically, drives the cylindrical roller rack to rotate and guide the optical disk to be coiled on the cylindrical roller rack. A locking device used for locking the optical disk automatically is mounted on the edge of the cylindrical roller rack. When a cylinder rotates and the laser head component moves in parallel in generatrix direction of the cylinder, the laser head component completes the writing and reading operations on the thread line of the optical disk, thereby traversing the recording surface of the whole optical disk.

Description

Cylindrical optical disc driver

Technical field

The present invention relates to a kind of optical disc shapes, data of optical disk read-write mode and corresponding CD drive.

Background technology

At present, widely used optical disc information recording mode has two types, and a class is a CD-ROM, comprising CD-Audio, CD-Video, CD-ROM, DVD-Audio, DVD-Video, DVD-ROM etc.; Another kind of is recordable disc, and it comprises CD-R, CD-RW, DVD-R, DVD+R, DVD+RW, DVD-RAM, Double layer DVD+R etc.The size of CD has common standard 120 CDs, roundel 80 type CDs, name card CD, two arc CD, special-shaped CD etc. usually.

The CD CD mainly is divided into five layers, comprising substrate, recording layer, reflection horizon, protective seam, printed layers etc.Optical disc information is recorded in the annular region between internal diameter and the external diameter.Data of optical disk reads mode usually that constant linear velocity reads mode, Constant Angular Velocity reads mode and region constant angular speed reads mode.

The present CD that uses, its information is to be recorded in the plane vertical with rotating shaft, promptly is recorded in the end face of thin column, the effective posting field of CD is that active data record area is little in the annular region between internal diameter and external diameter.System because data of optical disk track record radius changes, if will reach the constant linear velocity mode reads, just need adjust the rotating speed of spindle motor according to the position at laser head place when reading and write data; Constant Angular Velocity reads mode and region constant angular speed reads mode as if reaching, then along with track record radius difference, read-write frequency or data recording area size are also different, and it is comparatively complicated that this just makes that data write and read technology, and control accuracy is had relatively high expectations.

Summary of the invention

1. the technical matters that will solve

The present invention be directed to the little and data of optical disk in video disc recording zone and read comparatively problem such as complexity of technology, a kind of glimmer dish that is shaped as rectangle is proposed, by with CD on the rotatingcylindrical drum frame, form a drum, data recording surface becomes the side of cylinder, and laser beam modulation head assembly moves along the generatrix direction of cylinder and reads and writes data.Advantages such as the present invention has that effective optical disc information posting field is big, data of optical disk recording density height, constant linear velocity read and write data.

2. technical scheme

The technical solution used in the present invention is: CD is designed to rectangular shape, and thinner thickness, CD are made up of for five layers protective seam, recording layer, reflection horizon, substrate and printed layers etc. successively.Protective seam plays the effect of protection recording layer, adopts that impact flexibility is good, anti-bending strength strong, endurance, the serviceability temperature scope is big, dimensional stability good, the transparent medium of non-toxic, colorless constitutes, and is convenient to laser and reads and writes data by this layer; Recording layer is an organic dyestuff of smearing one deck special use on protective seam, is convenient to laser log or read data information; The light that reaches this layer can be reflected in the reflection horizon, light is reflected back strengthen the intensity of reading and writing signal; Basic unit is the skeleton of whole CD, adopts elasticity material better, that anti-bending strength good, retractility is little to make, as using thin stainless steel substrates; Printed layers is used to print CD for information about, plays protection, antisepsis simultaneously.Approach, be easy to curl what the CD integral thickness was done.

On two fixed edges of rectangle CD, be processed with bullport along the sideline.Bullport is arranged according to certain rules, matches with guide gear on the rotatingcylindrical drum frame, is used to locate CD and guiding and finishes CD is wrapped in the rotatingcylindrical drum frame.Its data recording track slight inclination and parallel to each other of CD that place on the plane, 4 or 8 data recording tracks are arranged on every data recording track, location by bullport, CD can be rolled into drum around the rotatingcylindrical drum frame, at this moment, its data recording track is a threaded line, along threaded line writable disc data, can travel through whole cd-rom recording surface.

Optical disc information read-write equipment (CD-ROM drive) mainly contains laser beam modulation head assembly, spindle motor, rotatingcylindrical drum frame and control circuit and forms.Laser beam modulation head assembly comprises that laser head, electrooptical device, condenser lens, driver etc. partly form, wherein independently the laser and/write device is integrated forms by 4 the road or 8 the tunnel for laser head, to become a branch of flat parallel beam by collimator apparatus from 4 road or 8 tunnel laser beam, by cylindrical lens focus on the recording layer of CD.This 4 road or 8 road light beam focus point spacing is the minimum interval that cd-rom recording of information is allowed, laser head once can read while write 4 road or 8 circuit-switched data information when read-write operation.On CD, this 4 road or 8 circuit-switched data recording track is formed a video disc recording track, and the interval between the track can be big a little.Whole laser beam modulation head assembly is installed on the slideway that is parallel to rotatingcylindrical drum frame axis, and laser beam modulation head assembly can be done translational motion along slideway under the effect of driver.Laser beam modulation head assembly keeps a fixing spacing with rotatingcylindrical drum trestle face at the volley.Driver is determined the position of laser beam modulation head assembly on slideway according to system signal, and by feedback control system, the constraint laser beam modulation head assembly is along data of optical disk track writable disc data.When cylinder rotates, laser beam modulation head assembly is during along the translation of cylinder generatrix direction, laser beam modulation head assembly can be finished at the read-write operation that is curled on the CD threaded line of cylinder, and the data of read-write are transferred in the external circuit by data cable.

Spindle motor directly drives the rotatingcylindrical drum frame by mechanical driving device and does the motion of pivoting.Under the effect of control circuit, spindle motor is mainly finished and is written into CD, writable disc and three kinds of motions such as eject CD.Be written into CD when motion doing, rotating speed is lower, cooperate control system to be written into CD and with disc volume on the rotatingcylindrical drum frame; When doing the writable disc motion, spindle motor is done the uniform angular velocity high-speed rotation, and under the effect of control circuit, laser beam modulation head assembly can be finished and read or write optical disc information along the translation of cylinder generatrix direction, and can travel through whole CD; When ejecting CD motion, the spindle motor backwards rotation cooperates control system to eject CD.

The rotatingcylindrical drum frame can sway under the driving of spindle motor.On two end face edge of roller shelves guide gear is housed, guide gear matches with bullport on the CD, is used for boot cd-rom and is wrapped in roller shelves.Mechanical locking device also is housed on roller shelves, cooperates control circuit, finish be written into CD after tension CD and pin the edge of CD.

Whole device is encapsulated in the CD drive box, and a CD socket is arranged on the CD drive box, and the rectangle CD can be written into or withdraw from by this socket.On the panel of driver box, be provided be written into, withdraw from, action button such as broadcast, F.F., volume, for the user provides corresponding operation.When inserting the rectangle CD, CD triggers photoelectric sensor switch, and the start-up control circuit under the guiding of control circuit, is finished the rectangular light travelling expenses according to preset program and walked around journey automatically.

3. beneficial effect

The optical disc information read-write mode that the present invention proposes has improved CD and has effectively write down area, the recording density height, and steering logic is simple, has advantages such as constant linear velocity read-write mode.

Description of drawings

Fig. 1 is a CD synoptic diagram of the present invention.

Fig. 2 is a CD-ROM structure synoptic diagram of the present invention.

Fig. 3 is a rotatingcylindrical drum frame synoptic diagram of the present invention.

Embodiment

Fig. 1 is a rectangle CD synoptic diagram, is called fixed edge (1) on two long limits of rectangle CD, is processed with pilot hole (2) on fixed edge, and when disc volume was on the rotatingcylindrical drum frame, the bullport on the CD matched with guide gear on the roller shelves edge.Finish the locking device that twines on the rotatingcylindrical drum frame of back and will lock the fixed edge of CD, CD stably is fixed on the rotatingcylindrical drum frame.Draw not in scale among the figure information recording track (3) of CD has comprised 4 road or 8 circuit-switched data recording tracks in the track record.When CD was locked on the rotatingcylindrical drum frame, track record formed a threaded line, and pitch is exactly the spacing between the adjacent track record.Laser beam modulation head assembly can be read all over whole record surface along threaded line when reading information; Laser beam modulation head assembly can along slideway direction uniform motion, be write completely whole record surface successively from fixed edge when writing information.The whole thinner thickness of CD, the CD sectional drawing (right view) that drawn not in scale among the figure is represented printed layers (4), substrate (5), reflection horizon (6), recording layer (7) and protective seam (8) respectively.

Fig. 2 is the CD-ROM structure synoptic diagram.Control button (1) and pushbutton switch (8) are arranged on the CD-ROM drive panel, can control actions such as CD is written into, plays, withdraws from, also can control the size of volume by gauge tap.CD is written into or withdraws from by CD socket (2).Cable socket and supply socket etc. (3) provide the supply socket of CD-ROM drive and computer interface, CD-ROM drive and audio frequency, video interface.Laser beam modulation head assembly (4) can finish writing or read data information along the axis direction motion of rotatingcylindrical drum frame (5).Spindle motor (6) drives the rotatingcylindrical drum frame and rotates.Guide wheel (7) is finished the guiding of CD and the locking function of CD.

Fig. 3 is a rotatingcylindrical drum frame synoptic diagram, and support (1) is got in touch into an integral body with slideway (4) with rotatingcylindrical drum frame (5), and plays fixing effect.Laser beam modulation head assembly (3) can be along the slideway translational motion under control circuit and driver effect.CD (7) is wound on the rotatingcylindrical drum frame, and locking device (2) is with the stretching locking of CD.Spindle motor (6) one ends are fixed on the support, and the other end is connected with the rotatingcylindrical drum frame by rotating shaft, for the rotatingcylindrical drum frame provides power.The view on right side is the cut-open view in the laser beam modulation head assembly leftward position.

Claims

1. CD drive, wherein CD is by protective seam, recording layer, the reflection horizon, substrate and printed layers are formed, it is characterized in that: the CD profile is a rectangle, thinner thickness, be processed with bullport at edge, the long limit of rectangle along the sideline, substrate has enough intensity, elasticity and toughness, protective seam is made up of transparent thin-medium, data recording track on its data recording track slight inclination and parallel to each other of CD that place on the plane, every track is 4 or 8 parallel lines, in CD drive, location by bullport, CD can be rolled into drum around the rotatingcylindrical drum frame, at this moment, its data recording track is a threaded line; Wherein CD drive is by casing, laser beam modulation head assembly, spindle motor, rotatingcylindrical drum frame and start-up control device are formed, it is characterized in that: laser beam modulation head assembly is integrated by 4 road or 8 tunnel laser data read-write equipments, by collimator apparatus and cylindrical lens laser beam is focused on the CD, laser beam modulation head assembly is installed on the slideway that is parallel to the rotating shaft of rotatingcylindrical drum frame, can on the data of optical disk track record, read while write 4 or 8 bit data, when cylinder rotates, during the laser beam modulation head assembly translation, can travel through whole cd-rom recording surface along a screw thread wire track record, finish the read-write operation on the video disc recording track; Have the locking optical disc apparatus on the rotatingcylindrical drum frame, make the CD uniform winding that is written on roller shelves, and make data recording track become a complete threaded line.