KR100195130B1 - Photo recording/reprodution apparatus - Google Patents

Abstract

According to the present invention, a deck, a turntable mounted on the deck and capable of loading different types of optical discs, a drive means for rotating the turntable, an optical lens having a reciprocating conveyance on the deck and having an objective lens to read information on the optical disc Pick-up, rotary drive means for generating a reciprocating motion of the optical pickup, transmission means for converting the rotational motion of the rotary drive means to reciprocating motion, and the optical pickup is conveyed toward the center of the optical disk loaded on the turntable. A stop member which stops the movement of the optical pickup when it is set, and the mounting member on the deck is set so that the objective lens of the optical pickup arrives at a region where leading regions of different types of optical disks overlap each other. An optical recording and playback device that can play back types of optical discs interchangeably It is a ball. The optical recording and reproducing apparatus according to the present invention can use a compact disc used for low density recording or a digital video disc used for high density recording in parallel as a recording medium.

Description

Optical recording and playback device

1 is a perspective view of an optical disk.

2 is a perspective view of a part of an optical recording and reproducing apparatus according to the present invention.

3 is an explanatory diagram showing leading regions for respective optical disks.

* Explanation of symbols for main parts of the drawings

11: reading area 12: data area

21: Deck 22: Turntable

25: optical pickup 26, 26: drive motor

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording and reproducing apparatus, and more particularly, to an optical recording apparatus capable of compatible playback of different types of optical disks, and in particular, a compact disc (CD) and a digital video disc (DVD). An optical recording / reproducing apparatus is provided in which an installation position of an optical pickup stop stopper is set at a predetermined position of a deck so that data recorded on different types of optical disks such as a digital video disk can be reproduced.

In general, examples of the optical recording / reproducing medium include compact discs, laser discs, and most recently developed digital video discs. Such division may be classified according to the density and capacity of data recorded on the medium. That is, compact discs are mainly used for audio having sufficient capacity even with low density recording, while laser discs having a larger diameter than compact discs are used for audio and video data reproduction. If a compact disc is to be used for recording audio and video data, a lack of capacity is a problem, and therefore, one or more discs must be used for a movie, which is usually produced for 1 to 2 hours. This problem is solved by a digital video disc, which records a large amount of audio and video data in a high density manner by different recording methods on a disc having the same size as a compact disc.

1 is a perspective view of a conventional optical disc. The radius A of the optical disk 10 is 60 mm, and the surface of the disk on which optical recording is performed may be divided into a reading region and a data region. In the disk 10 of the drawing, the leading area corresponds to the annular part 11 formed between the radial distance B and the radial distance C with respect to the center, and the data area corresponds to the part 12 except for the above area. Normally, information relating to optical disc data recording is recorded in the reading area 11. In order for the optical pickup of the reproduction apparatus to reproduce the optical recording, it first moves to the center toward the reading area 11 to read information necessary for reproduction. Thereafter, recording and reproducing of the data area are performed.

However, while the radius A of the optical disc 10 is the same in the case of the compact disc and the digital video disc, the radius B and C of the leading region 11 are different in both cases. To illustrate this in more detail, the radius A of the optical disc and the digital video are both equal to 60 mm. On the other hand, in the case of a compact disc, the leading area 11 is formed in an area between 23 mm and 25 mm in radius, whereas in the case of digital video, the leading area (B, C) is in between 22.6 and 24 mm. Is formed in the area of. That is, in order for the optical pickup to reach the leading area of digital video, it must be moved closer toward the center than in the case of a compact disc.

According to the prior art, the optical pickup must be stopped by the stopper in order to read the information of the reading area in the optical recording and reproducing apparatus. In more detail, the optical pickup moves toward the center when the reproducing operation starts, and is set by the stopper formed at a predetermined position to set the initial reproducing position. In other words, the objective lens of the optical pickup is aligned vertically above the reproduction area at the moment stopped by the stopper.

However, the above stopper position setting causes a problem that CD and DVD cannot be used in parallel with the same optical recording and reproducing apparatus. In other words, if a DVD whose reading area is closer to the center is to be played in the above optical recording / reproducing apparatus, the optical pickup stopped by the stopper set relatively out of radius does not reach the reading area of the DVD, and thus playback is impossible. Or errors are more likely to occur. In addition, if the position of the stopper is set closer to the center portion for the reproduction of the DVD, there is a problem that the optical pickup deviates toward the center portion beyond the leading area in the case of CD reproduction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide an optical recording and reproducing apparatus capable of compatible playback of different types of optical discs such as compact discs and digital video discs.

It is another object of the present invention to provide an optical recording and reproducing apparatus in which the position of the optical pickup stopper is set to be compatible with different types of optical discs such as compact discs and digital video discs.

In order to achieve the above object, according to the present invention, a deck, a turntable installed on the deck and capable of loading different types of optical discs, drive means for rotating the turntable, information reciprocally conveyed on the deck and on the optical disc An optical pickup having an objective lens so as to read a rotational means, rotational drive means for generating a reciprocating motion of the optical pickup, transmission means for converting the rotational motion of the rotational drive means to a reciprocating motion, and the optical pickup is loaded on the turntable. When the optical pickup is transported toward the center of the optical disk, the optical pickup stops moving, and the installation position on the deck is set so that the objective lens of the optical pickup reaches a portion where the leading regions of the different types of optical disks overlap each other. Compatible playback of different types of optical discs with a stop member The optical recording and reproducing apparatus that is provided.

According to one aspect of the invention, the position where the stop member is installed on the deck is such that the objective lens of the optical pickup is moved when the optical pickup is moved toward the center of the optical disk to be stopped by the stop member. It is set to be located at the top of the region between 23 and 24 mm from the center of the optical disk.

Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the accompanying drawings.

2 shows a part of the optical recording and reproducing apparatus according to the present invention as a perspective view, which is an optical recording and reproducing apparatus which can reproduce a compact disc and a digital video in combination. The basic configuration of the apparatus shown in FIG. 2 is similar to the compact disc dedicated optical recording and reproducing apparatus according to the prior art. In more detail, the optical recording and reproducing apparatus 20 includes a deck 21, a turn table 22 for loading an optical disk, a drive motor 29 for rotating the turn table 22, and the deck. The worm gear 28 which converts the rotational motion of the optical pickup 25 which can linearly reciprocate on 21, the optical pickup drive motor 26, and the optical pickup drive motor 26 into linear motion is carried out. Equipped. The optical pickup 25 is guided along the guide shaft 23 on the deck, and the guide shaft 23 is supported through the bearing 24. Although not shown, the optical pickup is provided with a tracking coil and a focusing coil. The tracking coil performs a function to controllably move the unit of the objective lens provided in the optical pickup in the radial direction within the range of the small distance, and the focusing coil is the objective lens and the optical disk surface of the optical pickup within the range of the small distance. Function to adjust the distance between.

Designated by reference numeral 29 is a stopper, which has the function of stopping the movement of the optical pickup as described above when the optical pickup moves to the center of the disc to read the information of the leading area. Therefore, the position of the stopper 29 is set so that the objective lens of the optical pickup 25 can correspond to the upper portion of the reading area.

3 is an explanatory diagram illustrating a position at which the stopper 29 can be set, which indicates an area where the leading regions of the CD and the DVD overlap. As described above, the DVD has a leading region formed between the radial distances 22.6 to 24 mm (indicated by reference numeral 31), and the CD has a leading region formed between the radial distances 23 to 25 mm (designated by reference numeral 32). ). Thus, the region where the leading regions of the CD and DVD overlap is a region between the radial distances 23 to 24 mm indicated by reference numeral 33.

According to a feature of the invention, the setting position of the stopper 29 for stopping the optical pickup 25 is set such that the objective lens reaches the upper portion of the overlap region 33 when the optical pickup is stopped by the stopper 29. do. That is, regardless of the case where the recording and reproducing mediums are CD and DVD, the objective lens can reach the leading region of the optical disc when the optical pickup 25 is stopped by the stopper 29.

As described above, the optical pickup is provided with a tracking coil for moving the objective lens in the radial direction within the micro distance range, so that the objective lens can be moved by the tracking coil even if the optical pickup unit can no longer move radially inward for the stop. The reading of the entire reading area can be performed by moving the minute distance in the radially inward direction. That is, in the case of a DVD, a reading area corresponding to a distance of 0.4 mm is further formed in the radially inward direction of the overlapping area, which is such a distance that the objective lens can read information by the action of the tracking coil.

The optical recording and reproducing apparatus according to the present invention can use a compact disc used for low density recording or a digital video disc used for high density recording as a recording medium, so that it is not necessary to provide a separate reproducing apparatus for each medium. There is an advantage.

Although the present invention has been described with reference to only one embodiment shown in the accompanying drawings, this is merely exemplary, and it will be understood by those skilled in the art that various embodiments are possible. Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

Claims (2)

A turntable on which the different types of optical discs can be loaded, a drive means for rotating the turntable, an optical pickup reciprocating on the deck and having an objective lens to read information on the optical disc, of the optical pickup Rotation drive means for generating a reciprocating motion, all kinds of means for changing the rotational motion of the rotational drive means into reciprocating motion, and when the optical pickup is moved toward the center of the optical disk loaded on the turntable, It is compatible with the above-described type of optical disc, comprising a stop member which stops the movement, and an installation position on the deck is set so that the objective lens of the optical pickup reaches a portion where leading regions of different types of optical discs overlap each other. Recording and reproducing apparatus that can be played back easily. 2. The position of the optical pickup according to claim 1, wherein the stop member is provided on the deck when the optical pickup moves toward the center of the optical disk and is stopped by the stop member. An optical recording and reproducing apparatus, characterized in that it is set to correspond to an area between 23 and 24 mm from the center of the disc.