KR20030009844A - Optical Pick-up Device of Cylindrical Disk - Google Patents

Abstract

PURPOSE: An optical pickup apparatus for a cylindrical optical disk is provided to improve the convenience by increasing the storage capacity of the optical information unit and carrying easily with decreasing the volume, and to enhance the stability and the reliability by reducing noise and vibration with decreasing radius of rotation during high speed rotating, by connecting plural optical disk parallelly. CONSTITUTION: An optical pickup apparatus comprises plural cylindrical optical disks(100), and a disk driving part(200). The cylindrical optical disk includes a data recording unit(101) for recording information and a label part(102) for holding. The disk driving part is combined with the optical disk in parallel to drive one or plural cylindrical optical disks simultaneously. The disk driving part records and reproduces data according to operation of the optical disk, and has a driving motor(201), plural optical pickup units(202), a recording and reproducing unit(203) and a buffer memory(204). Vibration and noise are minimized by reducing the radius of rotation of the optical disk at high speed rotation.

Description

Optical Pick-up Device of Cylindrical Disk

The present invention relates to an optical pickup device of a cylindrical optical disk, and in particular, by configuring a plurality of cylindrical optical disks made in a cylindrical shape in parallel and simultaneously driven, thereby increasing the storage capacity of the optical information storage device and the performance of the product. An optical pickup device for a cylindrical optical disk can be improved.

In general, conventionally known recording media for storing optical information include compact disks, digital video disks, and hard disk drives (HDDs).

The optical recording / reproducing apparatus using the optical disc (CD) detects a track position desired by a user on an optical disc which is an optical recording medium, and enters a light beam irradiated with a pit recorded on the optical disc surface of the detected track position. It is a device mounted below the optical disk so that the reflected light reflected back through the optical system to convert the electrical signal to reproduce the recording contents on the optical disk surface.

The optical disc (CD) is usually in the form of a disc with a diameter of 120 mm and a thickness of 1.5 mm, and starts to be marketed with a storage capacity of 650 MBytes, and currently only reads on both sides of a 120 mm diameter cross section. As high density capacity of 7-14GByte can be stored, optical disk (1) that can record and play back can also store 4-10GByte.

In general, as shown in FIG. 1, the optical disk 1 has a transparent substrate 2 made of a plastic material having excellent optical characteristics with a thickness of 1.5 mm, and a depth of 0.05-02 μm on the surface of the transparent substrate 2. A data recording unit 3 having a pit for recording information having a shape of 0.2-0.6 μm in width and 0.2-3.0 μm in length, a reflective film 4 formed on the upper surface of the data recording unit 3, and The coating unit 5 is coated to protect the reflective film 4, and the label unit 6 for attaching a label printed a trademark or a picture on the coating unit (5).

The optical disk made as described above is rotated by a drive motor provided in the optical pickup device, and recorded and reproduced by the optical pickup provided on the upper end of the optical disk. The photodetector of the hologram element is positioned at the same position as the light beam so that the data is recorded on the optical disc by the light beam of the optical pickup unit, and the light beam reflected from the pit of the optical disc can be converted into an electrical signal and properly transformed into an audio and video signal. I prepare it and construct it.

However, such disc-shaped optical disc 1 has a limitation in increasing the storage capacity of the data due to the limitation of the rotational speed, and when the capacity of the information device is increased, another CD drive or a CD changer must be separately provided. As a result, the cost is increased economically, and portable and mobile devices are not possible due to several optical discs and driving devices, and thus there is an inconvenience in use.

In addition, the disc-shaped optical disc 1 increases the rotational inertia moment due to the large radius of rotation of the disc-shaped optical disc 1 substrate, thereby increasing the width of the vibration even at small vibrations and noises during high-speed rotation, thereby improving the reliability and stability of the noise and recording. There was a problem to inhibit.

Accordingly, the present invention is to solve the conventional problems as described above, an object of the present invention, by connecting a plurality of cylindrical optical disks made in a cylindrical shape at the same time to drive the parallel drive, a plurality of An optical pickup device of a cylindrical optical disk is used to increase the storage capacity of an optical information storage device and improve the performance of a product by using a cylindrical optical disk.

Another object of the present invention is to provide an optical pickup device of a cylindrical optical disk to reduce the noise and vibration during high-speed rotation by making the disk in a cylindrical shape is smaller than the conventional disk-shaped disk.

In order to achieve the above object, an optical pickup apparatus of a cylindrical optical disk, which is an object of the present invention, is formed on a plurality of cylindrical optical disks having a cylindrical shape and on any one side of the cylindrical optical disk for information recording along the circumference of the optical disk. A data recording portion for forming a pit, a label portion formed on any other side of the cylindrical optical disk and having a handle function, and a disk driving portion coupled to the plurality of cylindrical optical disks in parallel to record and reproduce data in accordance with driving of the optical disk. Characterized in that comprises a.

1 is an exploded perspective view showing the structure of a conventional information storage optical disc;

Figure 2 is a schematic diagram showing the configuration of an optical pickup device of a cylindrical optical disk according to an embodiment of the present invention.

Figure 3a is a perspective view showing the state of use of the optical pickup device of the cylindrical optical disk according to an embodiment of the present invention,

3B is an enlarged perspective view of a portion A of FIG. 3A;

Figure 4 is a side view showing a state of use of the optical pickup device of the cylindrical optical disk according to an embodiment of the present invention.

5 is a perspective view showing a state of use of the optical pickup device of the cylindrical optical disk according to another embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: cylindrical optical disk 101: data recording unit

102: label portion 200: disk drive portion

201: drive motor 202: optical pickup

203: Recording / playback device section 204: Buffer memory section

204: central processing unit of the main computer system

300: first guide rail 400: second guide rail

Hereinafter, an optical pickup apparatus of a cylindrical optical disk according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a schematic diagram showing the configuration of the optical pickup device of the cylindrical optical disk according to an embodiment of the present invention, Figure 3a is a principal part perspective view showing the state of use of the optical pickup device of the cylindrical optical disk according to an embodiment of the present invention, 3B is an enlarged perspective view of portion A of FIG. 3A, and FIG. 4 is a side view illustrating a state of use of an optical pickup apparatus of a cylindrical optical disk according to an embodiment of the present invention, and FIG. 5 is a cylindrical optical disk according to another embodiment of the present invention. Is a perspective view showing the state of use of the optical pickup device.

First, as shown in FIGS. 2 to 5, the optical pickup apparatus main body of the cylindrical optical disc includes a plurality of cylindrical optical discs 100 and a disc drive unit 200.

The plurality of cylindrical optical disks (100) is formed in a cylindrical shape, and on any one side of the cylindrical optical disk (100) and a data recording unit (101) for recording information. Any other side is made up of a label portion 102 to function as a handle.

The disk drive unit 200 is coupled to the cylindrical optical disk 100 in parallel to drive not only the one cylindrical optical disk 100, but also to drive the plurality of cylindrical optical disks 100 at the same time.

In addition, the disc drive unit 200 is configured to record and reproduce data according to the driving of the cylindrical optical disc 100.

In addition, the disc drive unit 200 includes a drive motor 201, a plurality of optical pickup units 202, a recording / reproducing apparatus unit 203, and a buffer memory unit 204.

The drive motor 201 is configured to drive the cylindrical optical disk 100.

The plurality of optical pickup units 202 signal and simultaneously record and read data of the pit 101a formed on the optical disk by using an optical beam while moving the circumferential surface of the optical disk 100 according to the driving of the cylindrical optical disk 100. It is supposed to be.

The recording and playback device portion 203 is composed of a recording device portion 2030 and a playback device portion 2031.

The recording device unit 2030 is provided with a recording signal generator 2030b for generating a recording signal.

The recording signal generator 2030b is configured to send a signal of the recording signal generator 2030b to the optical pickup unit 202 through the optical modulator 2030a.

The optical pickup unit 202 converts this signal into a light beam and fires and records the light beam on the pit 101a of the cylindrical optical disk 100.

The reproducing apparatus unit 2031 emits a light beam of the optical pickup unit 202 to the pit 101a of the cylindrical optical disc 100, and transmits the light beam reflected from the pit 101a of the optical disc 100 to the optical pickup unit. The signal 202 converts the signal into an electrical signal and applies the converted electrical signal to the signal detection unit 2031a.

The signal detected by the signal detector 2031a is applied to the A / D converter 2031b.

The A / D converter 2031b is configured to apply the converted signal to the buffer memory unit 204.

The buffer memory unit 204 stores the electrical signals of the recording and reproducing apparatus unit 203 and transmits the data electrical signals to the central processing unit 204 of the main computer system.

In addition, the disc driver 200 is provided with a first guide rail 300 to drive the optical pickup unit 202 up and down.

The disc drive unit 200 is provided with a second guide rail 400 to drive the optical pickup unit 202 left and right.

The optical pickup unit 202 is coupled to the first and second guide rails 300 and 400 and simultaneously slides up and down and left and right along the guide rails 300 and 400. 202a and 202b are formed.

Then, the operation of the optical pickup device of the cylindrical optical disk according to an embodiment of the present invention having the above configuration will be described in more detail with reference to FIGS. 2 to 5.

First, as shown in FIG. 2, the optical pickup apparatus main body of the cylindrical optical disc drives the cylindrical optical disc 100 to record and reproduce data of the optical disc 100.

At this time, the cylindrical optical disc 100 is provided with a pit 101a for information recording along the circumference of the optical disc 100. This part is called the data recording unit 101.

The cylindrical optical disk 100 is coupled to the disk drive unit 200. In this state, when the drive motor 201 of the disc drive unit 200 is driven, the cylindrical optical disc 100 rotates.

In this case, since the optical pickup unit 202 for reading the entire recording data by the light beam while moving the circumferential surface of the optical disc 100 to the left and right according to the driving of the cylindrical optical disc 100 is provided in the disc drive unit 200, The optical pickup unit 202 reads the data record of the cylindrical disk 100.

Here, since the disc drive unit 200 includes a recording / playback unit 203 for recording and reproducing data read by the optical pickup unit 202, the recording / playback unit 203 provides an optical disc 100. Record and play back data.

At this time, since the recording and reproducing apparatus section 203 of the disk driving section 200 is provided with a recording apparatus section 2030 capable of recording information on the cylindrical optical disk 100, the recording apparatus section 2030 is a buffer memory section 204. Is applied to the recording signal generator 2030b, and is sent to the optical modulator 2030a through the recording signal generator 2030b, and at the same time, the optical modulator 2030a converts the signal into an optical beam to pick up the optical pickup unit. Through 202, a light beam is emitted to the circumferential surface of the cylindrical optical disk 100 and recorded in the pit 101a.

In addition, the recording and reproducing apparatus unit 203 of the disc drive unit 200 emits a light beam by the optical pickup unit 202 on the circumferential surface of the cylindrical optical disc 100 so that the data recorded on the cylindrical optical disc 100 can be reproduced. Then, the optical beam reflected from the pit 101a of the optical disc 100 is converted into an electrical signal by the optical pickup unit 202. The digital signal is detected as an electrical signal through the signal detector 2031a for detecting the converted signal, the detected electrical signal is applied to the A / D converter 2031b, and the digital signal converted through the A / D converter 2031b. Is applied to the buffer memory unit 204.

In this case, since the disk drive unit 200 has a buffer memory unit 204 for storing the data of the recording / reproducing apparatus unit 203 and transferring the data to the central processing unit 204 of the main computer system, the buffer memory unit 204 reproduces the data of the recording and reproducing apparatus unit 203.

In this way, the buffer memory unit 204 solves the problem caused by the speed difference or the time difference between the data transfer with the central processing unit 204 of the main computer system, thereby enabling high-speed data recording and reproducing.

In addition, a plurality of optical pickups 202 for coupling a plurality of cylindrical optical disks 100 in parallel to the disk driving unit 200 and for reading a plurality of cylindrical optical disks 100 in the disk driving unit 200 are provided. Therefore, the plurality of cylindrical optical disks 100 can be driven simultaneously to record and reproduce data.

In addition, as illustrated in FIGS. 3A and 3B, the disc driver 200 is provided with first and second guide rails 300 and 400 to drive the optical pickup unit 202 vertically and horizontally. After coupling the plurality of cylindrical optical disks 100 in parallel, the optical pickup unit 202 is driven up, down, left and right through the first and second guide rails 300 and 400 to record data of the cylindrical optical disk 100. And play.

As shown in FIG. 4 and FIG. 5, the optical pickup unit 202 is formed with a first guide hole 202a to drive the first guide rail 300 in the up and down directions. A second guide hole 202b is formed to drive the second guide rail 400 in left and right directions.

As described above, the plurality of cylindrical optical discs 100 are driven through the disc drive unit 200, and thus, there is no limitation of data capacity, so that the plurality of cylindrical optical discs 100 can be used, and a run-out phenomenon caused by an external impact during driving is possible. In addition to this, the noise and vibration of the product can be eliminated.

The buffer memory unit 204 serves as a buffer for the speed and time difference according to the reading of the central processing unit 205 of the main computer system.

In addition, the disk driving unit 200 may not only drive one cylindrical optical disk 100 at a time, but may also drive a plurality of cylindrical optical disks 100 simultaneously and continuously.

As described above, the disk driving unit 200 may drive one or more cylindrical optical disks 100 by storing one video file in one or more cylindrical optical disks 100 by connecting one or more cylindrical optical disks 100 in parallel. The plurality of buffer memory units 204 to buffer the time difference caused by the movement and the time difference caused by the drive of the optical disc 100 in the optical pickup unit 202 for moving the circumference of the cylindrical optical disc 100 between the connections of the 100. It is provided.

As described above, since a plurality of cylindrical optical discs 100 can be recorded and reproduced in one disc drive unit 200, a plurality of CD players and CD changers are not required, and thus portableness is easy.

In addition, since the optical drive unit 202 of the disc drive unit 200 is configured to move directly, the disc drive unit 200 consumes less energy in reading and recording of the cylindrical optical disc 100, and in a small space. It is possible to move.

The optical pickup apparatus of the cylindrical optical disk of the present invention described above is not limited to the above-described embodiments and drawings, and various substitutions, modifications, and changes can be made without departing from the technical spirit of the present invention. It will be apparent to those of ordinary skill in the art.

As described above, according to the optical pickup apparatus of the cylindrical optical disk according to the present invention,

By constructing a disk drive unit which drives a plurality of cylindrical optical disks connected in parallel to each other, the storage capacity of the optical information device is increased to overcome the limitations caused by the use of the product and improve the performance and use of the product. Due to the small volume of the cylindrical optical disk, it is easy to carry after storing a large capacity, and also has the effect of improving the reliability and stability of the product by minimizing the occurrence of noise and vibration due to the small radius of rotation during high-speed rotation.

Claims (4)

A plurality of cylindrical optical disks having a cylindrical shape, A data recording portion formed on any one side of the cylindrical optical disk to form a pit for recording information along a circumference of the optical disk; A label portion formed on any other side of the cylindrical optical disk and serving as a handle; And a disk drive unit coupled to the plurality of cylindrical optical disks in parallel and recording and reproducing data according to the driving of the optical disks. The method of claim 1, The disk drive unit, a drive motor for driving the cylindrical optical disk, A plurality of optical pickups which move along the surface of the cylindrical optical disc and record and read and simultaneously signal data of pits formed on the optical disc; A recording and reproducing apparatus unit for recording and reproducing an electric signal of the optical pickup unit; And a buffer memory unit for storing the electrical signal of the recording and reproducing unit and transmitting the electrical signal to the central processing unit of the main computer system. The method of claim 1, And the first and second guide rails are installed in the disk driving unit so as to be coupled to the optical pickup unit to drive the optical pickup unit vertically and horizontally. The method of claim 2, The optical pickup unit, the optical pickup device of the cylindrical optical disk, characterized in that the first and second guide holes are formed to be coupled to the first and second guide rails of the disk drive unit and to be movable along the guide rail.