KR19980058828A - Disc presence determination device of optical disc changer system - Google Patents

Abstract

The present invention relates to an apparatus for determining the presence or absence of a disc in an optical disc changer system, and includes a laser diode (11) embedded in the optical pickup unit (10) for emitting predetermined light when the disc is chucked, and light emitted from the laser diode (11). A light receiving sensor 18 for generating a detection signal according to whether or not the light is received, and whether or not the disk is mounted according to the detection signal provided from the light receiving sensor. The disk is not mounted in accordance with the output signal of the OSD processing unit 110 and the OSD processing unit 110 for OSD processing the text provided by the microcomputer 50 and the control signal of the microcomputer 50 to generate characters. It includes a display unit 120 to display as a letter.

Therefore, the present invention has the effect of making it possible to quickly process the following functions without time delay by more quickly determining whether or not the disc is loaded at each disc mounting portion including the disc tray of the optical disc changer system without performing focusing. have.

Description

Disc presence determination device of optical disc changer system

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk changer system, and more particularly, to the presence or absence of a disk in an optical disk changer system, which makes it possible to more quickly determine whether a disk is loaded at each disk mounting portion so that subsequent data processing can be performed faster without time delay. It is related with a discrimination apparatus.

With the development of audio and video media, optical disc players for recording and reproducing video and audio data on semi-permanent optical discs have been developed.

Such an optical disc player reproduces an image and / or audio recorded on an optical disc and outputs it through a screen and / or a speaker, and has a higher signal-to-noise ratio than conventional image and / or audio reproducing apparatus, resulting in better image quality and / or Or it can reproduce the signal with sound quality, it does not generate noise due to irregular reproduction and modulation, very low distortion, no ghost and random access, so it is rapidly developed and widely distributed. There is a trend.

In addition, such an optical disk player includes a compact disk player (CDP), a laser disk player (LDP), a compact disk graphic player (CDGP), and a video compact disk player (VCDP: video compact disk player) has been developed and widely used. Also, recently, a digital video disk (DVD) using MPEG-2 moving picture compression technology and a digital video disk player for playing the same have been developed. It can record and play back gigabytes (GB) of data including moving images on a 12cm optical disc such as a CD, and it is also designed to be compatible to play current CDs and VCDs.

In addition, as the performance and functions of such an optical disc player develop, various kinds of data recorded on the optical disc are diversified. In the case of a large amount of data such as a movie, the data corresponding to one movie is recorded on one disc. There was a case where not all of the recordings were possible, and also, inconvenience in use was caused by replacing the disc with a desired disc every time it was used.

Therefore, an optical disc changer system has been developed to alleviate these inconveniences, and such an optical disc changer system can mount a plurality of discs in one disc tray and then selectively play a desired disc sequentially or as needed. Developed.

As described above, the optical disc changer system is provided with a disc tray made for mounting a plurality of discs, the disc tray having a disc mounting portion for mounting a plurality of discs, and rotating the discs. Roulette is provided for.

In addition, as described above, the roulette constituting the disc tray rotates to perform a predetermined function to change the position in the disc tray of a plurality of discs, each fixedly located at a predetermined position of the upper surface of the roulette. A lower surface, that is, a lower surface corresponding to the position of each disk mounting portion, is provided with a tooth-shaped protrusion for distinguishing each disk during roulette rotation.

1 is an internal perspective view of a disc tray in an optical disc changer system capable of simultaneously mounting three discs.

As shown in FIG. 1, the disc tray 100 of the optical disc changer system is coupled to the disc mounting portions 5 in a vertical direction through predetermined axes (not shown) to the lower portions of the disc mounting portions 5. To determine the rotational position of the roulette 3 and the disk is a sensor is installed in a predetermined position, the drive unit for fixing the roulette 3 through the predetermined axis, and rotates the roulette 3 through the axis (not shown) Has a built-in roulette base (1).

2 is a schematic structural block diagram of a general optical disc changer system.

As shown in FIG. 2, a general optical disc changer system includes an optical pickup unit 10, a radio frequency (RF) signal amplification and servo signal processing unit 20, a motor and motor driver 30, a key input unit 40, a microcomputer, and a microcomputer. 50, the digital signal processor 60, the MPEG decoder 70, the audio signal processor 80, and the video signal processor 90 are configured.

The optical pickup unit 10 performs an optical pickup from a disk loaded in a disk tray (not shown), and outputs the RF signal read out accordingly to the RF signal amplification and servo signal processing unit 20.

In addition, the motor and the motor driving unit 30 drive the spindle motor (not shown) to rotate the disk and drive the actuator unit 10 so that the pickup unit 10 performs optical pickup to read data recorded on the disk. To output as an RF signal.

The RF signal amplification and servo signal processor 20 amplifies the RF signal provided from the optical pickup unit 10 and provides a servo control signal according to the signal to the motor and the motor driver 30 so that the focus servo and the tracking servo may be To be done.

The digital signal processing unit 60 digitally processes the amplified RF signal provided from the RF signal amplification and servo signal processing unit 20, performs error detection and error correction, and outputs the result to the MPEG decoder 70.

The MPEG decoder 70 decodes an error corrected digital video signal and an audio signal provided from the digital signal processor 60 based on the MPEG compression format and outputs the decoded video signal to the video signal processor 90 and the audio signal processor 80. .

The audio signal processor 80 and the video signal processor 90 process the decoded audio and video signals provided from the MPEG decoder 70 and output them to a speaker (not shown) and a screen (not shown), respectively. Speakers and screens are displayed as audio and video, respectively.

Meanwhile, in the optical disc changer system as shown in FIGS. 1 and 2, when the disc tray 100 is opened and the disc tray 100 is closed after the disc tray 100 is mounted, the roulette 1 is closed. 1) Disc chucking is performed for each disc mounting portion 5 while rotating the disc, focusing again, and when the focus is completed, the table of contents (TOC) data for the disc is read and stored, and the TOC When the reading and storing of the data is completed, the key input standby state is completed.

In other words, whether or not a disk is mounted in the disk mounting unit 5, the disk chucking is executed and focusing is executed several times. When the focus is achieved, the TOC data of the disk is read and stored. Recognizing that the disk is not mounted on the disk), the chucking is released and the roulette 1 is rotated to repeat the above-described process for the next disk mounting portion 5, thereby eliminating the disk at all the band mounting portions 5. Confirmation of the presence and completion of reading and storing of the TOC data and waiting for the function key signal to be input.

Therefore, in the prior art, each disc mounting unit provided in the disc tray attempts to focus on the disc several times and recognizes that the disc is not mounted when the focus is not achieved. Therefore, there is a problem of delaying time even after executing a predetermined function.

Accordingly, the present invention has been made to solve such a problem in the related art, and an object of the present invention is to determine whether or not a disc is loaded at each disc mounting portion in an optical disc changer system more quickly without performing focusing, thereby further processing data thereafter. The process is also to provide a disk presence determination device of the optical disk changer system to be made quickly.

According to a preferred embodiment of the present invention for achieving this object, an optical disk changer including an optical pickup section for performing optical pickup to read data recorded on a predetermined disk, and a disk tray for mounting a plurality of disks. In the system, a device for quickly determining whether the disk is mounted at each disk mounting portion provided for mounting the disk in the disk tray at the beginning of the disk chucking, is embedded in the optical pickup portion for chucking for the respective disk mounting portion. The laser diode which emits a predetermined light for determining the presence or absence of a disk, and the lower surface of the clamper plate that supports the clamper for chucking the disk during the chucking operation are installed to face the laser diode so as to be emitted from the laser diode. Receives incoming light A light receiving sensor for generating a high or low detection signal according to the detection signal and a detection signal provided from the light receiving sensor, and determining whether or not the disk is mounted. A microcomputer for outputting a control signal and predetermined data stored therein; an OSD processing unit configured to display and process an on-screen display (OSD) of the predetermined data according to the control signal of the microcomputer; and an output signal of the OSD processing unit as text. And a display unit for informing that the disc is not mounted.

1 is a schematic perspective view of a disc tray of an optical disc changer system

2 is a schematic block diagram of a typical optical disc changer system;

3A and 3B are schematic diagrams for explaining a disk presence determining apparatus according to the present invention.

4 is a block diagram of an optical disk changer system according to a preferred embodiment of the present invention.

<Description of the code | symbol about the principal part of drawing>

1: Roulette 5: Disk Mount

10 optical pickup section 11: laser diode

12: turn table 14: clamper

16: Clamper Plate 18: Receiver

32: spindle motor 100: disc tray

110: OSD processing unit 120: display unit

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

3A and 3B are schematic diagrams showing an optical pickup section 10 and a disc chucking section for explaining the present invention, and FIG. 4 is a block diagram of a disk presence determining apparatus of the optical disk changer system according to a preferred embodiment of the present invention. to be.

As shown in FIGS. 3A and 3B, the disc chucking unit rotates the disc during the disc chucking so that the optical pick-up unit 10 reads data from the disc, and is located above the turn table 12. Thus, when the disk is loaded on the turn table 12, the clamper 14 for chucking the disk and the clamper plate 16 for supporting the clamper 14 are provided.

In addition, the spindle motor 32 connected to the lower part of the turn table 12 by a predetermined axis rotates the disc chucked at the speed at which the optical pickup unit 10 can read data during reproduction. In addition, the light receiving unit 18 according to the present invention is provided to face the optical pickup unit 10 at a predetermined position of the lower surface of the clamper plate 16.

First, FIG. 3A is a diagram for explaining a case where chucking is performed in a state where a disk is not mounted.

That is, since there is no disk between the turntable 12 and the clamper, when the laser diode 11 embedded in the optical pickup unit 10 emits a predetermined light during the chucking operation, the light receiving unit 18 in the laser diode 11 The emitted light is received and thus a detection signal, for example, a high signal, is output.

In addition, since the disk is loaded between the turn table 12 and the clamper 14 in FIG. 3B, the light emitted from the laser diode 11 of the optical pickup unit 10 is reflected by the disk surface while chucking is performed. Thus, the light receiving unit 18 is not reached. That is, the light receiving unit 18 does not receive the light, and also outputs a detection signal according to this, for example, a low signal.

Again, referring to Figure 4 when the overall operation of the present invention will be described.

FIG. 4 is a block diagram illustrating an apparatus for determining the presence or absence of a disc in an optical disc changer system according to a preferred embodiment of the present invention, which is embedded in the optical pickup unit 10 and emits a predetermined light when disc chucking. And a light receiving sensor 18 for receiving the light emitted from the laser diode 11 and generating a detection signal according to whether or not the light is received, and determining whether the disk is mounted according to the detection signal provided from the light receiving sensor. If it is determined that the control unit and the control signal and data according to the microcomputer 50, the OSD processing unit 110 for OSD processing the data provided according to the control signal of the microcomputer 50, and the OSD processing unit 110 of And a display unit 120 for displaying as text that the disk is not mounted according to the output signal.

The laser diode 11 is embedded in the optical pick-up section 10, which may be the same laser diode as the laser diode built in for reading data from the disk, and the roulette 1 rotates to allow chucking for each disk mounting portion. If done, the chucking is completed and at the same time emits a predetermined light for disc presence determination.

On the other hand, the light receiving sensor 18 is installed opposite the laser diode 11 on the lower surface of the clamper plate 16 for supporting the clamper 14 for chucking the disk during chucking, and is emitted from the laser diode 11 Receives light and generates a high or low detection signal to the microcomputer 50 according to the presence or absence of reception.

Accordingly, the microcomputer 50 determines whether the disk is mounted according to the detection signal provided from the light receiving sensor 18, and if it is determined that the disk is not mounted, the control signal and predetermined data stored therein, namely, Data indicating that the disk is not mounted is output to the OSD processing unit 110.

Then, the OSD processor 110 processes an on-screen display (OSD) of predetermined data provided from the microcomputer 5 according to the control signal of the microcomputer 50, and outputs the data to the display 120. Displays the output signal of the OSD processing unit 110 as text to recognize the user that the disk is not mounted.

On the other hand, if it is determined whether or not the disk is mounted through such a process, if the disk is mounted, focusing is performed, and after completion of focus, the TOC data is read and stored, the chucking is released, and the roulette 1 is rotated to rotate the next disk mounting unit ( In step 5), check the presence or absence of the above-mentioned disc presence determination process again, and if the disc is not mounted, display that the disc is not mounted, then immediately cancel the chucking and rotate the roulette 1 The disc presence or absence is discriminated by the disc loading unit 5.

As described above, the present invention can quickly determine the presence or absence of the disc loading in each disc mounting portion provided with the disc tray of the optical disc changer system without performing focusing, so that the subsequent function can be performed without time delay. It has an effect.

Claims (1)

In the optical disc changer system including an optical pickup section 10 for performing optical pickup to read data recorded on a predetermined disk, and a disk tray 100 for mounting a plurality of disks, the disk tray 100 In the apparatus for quickly determining whether the disk is mounted in each disk mounting portion 5 provided for disk mounting at the beginning of the disk chucking, A laser diode (11) embedded in the optical pick-up unit (10) and emitting predetermined light for disc presence determination when chucking of each disc mounting unit (5) is performed; When the chucking is executed, the lower surface of the clamper plate 16 supporting the clamper 14 for chucking the disk is installed to face the laser diode 11 to receive and receive the light emitted from the laser diode 11. A light receiving sensor 18 for generating a high or low detection signal depending on the presence or absence; A microcomputer 50 for determining whether the disk is mounted according to a detection signal provided from the light receiving sensor 18 and for outputting a control signal and pre-stored predetermined data when it is determined that the disk is not mounted; An on-screen display (OSD) processor 110 for outputting an on-screen display (OSD) of the predetermined data according to a control signal of the microcomputer 50; And a display unit (120) indicating that the disk is not mounted by displaying the output signal of the OSD processing unit (110) as a letter.