KR19980061664A - Disc position recognition device of the optical disc changer system - Google Patents

Abstract

The present invention relates to a disc position recognizing apparatus of an optical disc changer system, comprising: the same number of light generating units (40, 42, 44) as the number of disc mounting portions (5) for generating predetermined light; The number of light receiving sensors equal to the number of holes 16, 17, and 18 generating a logic signal depending on whether light provided from the light generators 40, 42, and 44 passes through the holes 16, 17, and 18 is detected. (51,52,53,54,55,56); A latch 60 for latching logic signals provided from the light receiving sensors 51, 52, 53, 54, 55, 56 and outputting the parallel data, respectively; A parallel / serial register 70 for converting parallel data output from the latch 60 into serial data and outputting the serial data; And a microcomputer 8 for recognizing and discriminating the position of each disk mounting unit 5 and whether or not the disk is mounted from the serial data provided from the parallel / serial register 70.

Therefore, the present invention has the effect of recognizing the presence of the disk in the disk mounting portion and the position of each disk mounting portion without rotating the roulette.

Description

Disc position recognition device of the optical disc changer system

The present invention relates to an optical disc changer system, and more particularly, to a disc position of an optical disc changer system capable of detecting the position of a disc mount in the current disc tray and the presence or absence of a disc at each disc mount without rotating the roulette. It relates to a recognition device.

Conventional optical disc players, i.e., optical disc players, include compact disc players (CDP), laser disk players (LDP), compact disk graphic players (CDGP), and video. Video compact disk players (VCDP) have been developed and used, and recently, digital video disks (DVD) using MPEG-2 moving picture compression technology have been developed. It is possible to record and play back gigabytes (GB) of data including moving images in a 12 cm optical disc, and it is continuously developing to improve its performance.

On the other hand, such optical disc players reproduce images and / or audio recorded on the optical disc and output them through a screen and / or a speaker, and have a higher signal-to-noise ratio than conventional image and / or audio reproducing apparatus, resulting in better image quality. And / or can reproduce signals with sound quality, generate no noise due to irregular reproduction and modulation, very little distortion, no ghosts, and random access. There is a trend that is spreading.

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, which can be equipped with a plurality of discs, and a roulette for rotating the discs. .

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 positioned at a predetermined position of the upper surface of the roulette.

1 and 2 are an internal perspective view and a plan 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. There is provided a roulette 1.

Meanwhile, IDs are assigned to the disk mounting units 5 of the disk tray 100 to distinguish each disk mounting unit 5. For example, in Fig. 1, three disk mounting units 5 are assigned IDs 1, 2, and 3, respectively, which makes it easier to search for one desired disk among the disks mounted in the disk mounting units 5, respectively. 3 shows a block diagram of a rotational position control device in the optical disk changer system that searches for the ID of the disk and controls the rotational position.

In FIG. 3, the roulette 1 rotates forward or reverse by driving the driving unit 30. In addition, the driving of the driving unit 30 is performed by the control of the microcomputer 30.

On the other hand, the ID sensor unit 10 is provided on the side of the roulette (1). As shown in FIG. 2, the ID sensor unit 10 generates one low pulse when the protrusion 1 of the disk mounting unit 5 of ID 1 is opposed to the ID sensor unit 10. When the protrusions 12 face each other, two consecutive low pulses are generated, and when the protrusions 14 of the disk mounting part 5 of the ID 3 face each other, three consecutive low pulses are generated and provided to the microcomputer 20.

Accordingly, the microcomputer 20 rotates the roulette 1 by counting the number of consecutive low pulses provided from the ID sensor unit 10 to determine the ID of the disk mounting unit 5 facing the current ID sensor unit 10. The location can be determined.

That is, the driving unit 30 is operated by the control of the microcomputer 20, and the driving unit 30 rotates the roulette 1 in a predetermined direction. As the roulette 1 rotates, the disk mounting portions 5 installed on the top of the roulette 1 face the ID sensor portion 10, and the ID sensor portion 10 faces each time the disk mounting portions 5 face each other. The number of consecutive low pulses corresponding to the ID of the loaded disk mounting unit 5 is generated and provided to the microcomputer 20, and the microcomputer 20 counts the number of consecutive low pulses to the current ID sensor unit 10. The IDs of the disc mounting portions 5 which are opposed to each other are determined, and thereafter, the discs mounted on the disk mounting portions 5 are chucked and the focusing is executed several times in order to determine the presence or absence of a disc at each of the disc mounting portions 5. . That is, if focusing is performed several times and focusing is performed, it is determined that there is a disk. If focusing is not performed, it is determined that there is no disk.

On the other hand, the ID sensor unit 10 generates consecutive low pulses indicating an ID and four consecutive low pulses indicating a start / stop code between successive low pulses. That is, the start / stop code is inserted and generated between the fixed IDs for the respective disk mounting portions 5 of the rotating roulette 1, to distinguish the end of the fixed ID from the start of the next ID.

In the rotation position control method using the disk ID search which operates as described above, in order to search for the ID of each disk mounting portion 5, the rotation position control method first rotates the roulette 1, searches for the above-described start / stop code, and then detects it. Then, the ID of the disc mounting unit 5 is searched to recognize the current rotational position, and focusing is performed to determine whether or not the disc is mounted.

That is, in the related art, in order to determine the current position of each disk, that is, the disk mounting unit, the disk ID must be rotated to determine the disk ID and focusing must be performed to determine whether the disk is mounted in each disk mounting unit. There was this.

Therefore, the present invention has been proposed to solve the above-mentioned disadvantages, and an object of the present invention is to determine the current position of each disc mounting portion and the presence or absence of disc mounting at each disc mounting portion without rotating the roulette in the optical disc changer system. An optical disk changer system provides a disk position recognition apparatus.

According to a preferred embodiment of the present invention for achieving this object, a roulette for changing the position of the disk mounting portion by rotating in a predetermined direction provided with a plurality of disk mounting portion for mounting each disk, and the disk mounting portion In the disk position recognition device of the optical disk changer system having a disk tray comprising: each disk mounting portion provided in the roulette is formed with a pair of holes for discriminating the presence or absence of a disk and a hole for determining the position of the disk mounting portion, The position determining hole of the first disk mounting portion of the disk mounting portions is formed spaced apart from the hole for discriminating the disc presence or absence so that a predetermined light can pass through, and each of the disk mounting portion of each disk mounting hole Is that the predetermined light cannot pass through The disk mounting portion is formed to be spaced apart from the disc for determining the presence or absence of the disc, the disc mounting portion is provided on the lower surface of the main chassis of the disc tray so as to face the respective disc presence or absence for generating the predetermined light The same number of light generators as the son and at the upper surface of the roulette base are respectively located at positions opposite to the pair of holes of the first disk mounting portion to detect light provided from the light generators through the holes, A light receiving sensor having the same number as the number of the holes for generating a logic signal according to whether the light is detected, a latch for latching the logic signals provided from each of the light receiving sensors, and outputting the parallel data as parallel data; Parallel / serial register that converts parallel data into serial data and outputs And a microcomputer that recognizes and discriminates the position of each disk mounting portion and whether or not the disk is mounted from the serial data provided from the parallel / serial register.

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

2 is a plan view of a disc tray of a conventional optical disc changer system.

3 is a schematic block diagram of a rotation position control device of a conventional optical disc changer system;

4 is a plan view of a disc tray of the optical disc changer system according to the present invention.

5 is a plan view of a disc tray of the optical disc changer system according to the present invention.

6 is a block diagram showing the configuration of a disc position recognizing apparatus of the optical disc changer system according to the present invention.

7 is a waveform diagram showing an example of a signal for disc presence and position recognition in the disc position recognition device of the optical disc changer system according to the present invention;

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

1: Roulette 5: Disk Mount

7: Main chassis 10: ID sensor unit

11, 12, 14: protrusions 16, 17, 18: hole

20: microcomputer 30: drive unit

40, 42, 44: light generator 51, 52, 53, 54, 55, 56: light receiving sensor

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

Figure 4 is a plan view of a disc tray according to the present invention, taking a three-chain system as an example.

As shown in Fig. 4, the roulette provided in the disc tray according to the present invention includes a hole for determining whether a disc is formed on the upper surface of each disc mounting portion 5, and the hole is spaced apart from the hole by a predetermined distance. It is formed, the holes for the position recognition of the disk mounting portion is formed in a pair (16, 17, 18), respectively.

In addition, as shown in (a), (b), and (c) of FIG. 5, the lower surface of the main chassis above the disc tray is provided with light for disc presence determination and position recognition at positions opposite to the holes. The light generating parts 40, 42, and 44 are formed.

In addition, at positions facing the holes 16, 17, and 18 of the upper surface of the roulette base 3 supporting the roulette, first light for detecting light generated from the light generators 40, 24, and 44, respectively. And the second light receiving sensors 51 and 52, the third and fourth light receiving sensors 53 and 54, and the fifth and sixth light receiving sensors 55 and 56 are exactly opposite to the holes 16 formed in the first disc mounting portion. It is installed in each position. That is, the first, third, and fifth light receiving sensors 51, 53, and 55 are light receiving sensors for detecting the presence of a disk, and the second, fourth, and sixth light receiving sensors 52, 54, and 56 are located at respective disk mounting portions. Sensor for discrimination.

Thus, as shown in Figs. 4 and 5, when the disc is mounted to each disc mounting portion 5, the first, third and fifth light receiving sensors 51, 53, 55 are provided with the light generating portions 40, 42, It will not receive the light generated from 44, and if not mounted it will receive the light, depending on whether the light is detected, generates a logic signal of 'high' or 'low' to the latch 60, respectively.

In addition, since only the position recognition hole 16 formed in the first disk mounting portion, that is, the first disk mounting portion, is formed at a position capable of passing the light of the light generating portions 40, 42, 44, the first disk mounting portion is mounted. Only one light receiving sensor of the second, fourth, and sixth light receiving sensors 52, 54, 56 where the part is located will receive the light generated from the light generating units 40, 42, 44, wherein The second, fourth, and sixth light receiving sensors 52, 54, and 56 provide a logic signal according to whether light is received to the latch 60, similarly to the first, third, and light receiving sensors 51, 53, and 55.

Then, the latch 60 latches the logic signals provided from the first to sixth sensors 51, 52, 53, 54, 55, and 56 in parallel with the clock signals provided from the microcomputer 80 to be described later. Will output

The parallel / serial register 70 converts the parallel data provided from the latch 60 into serial data and provides the serial data to the microcomputer 80. Like the latch 60, the parallel / serial register 70 synchronizes with the clock signal provided from the microcomputer 80. Driven.

On the other hand, the microcomputer 80 discriminates and recognizes the presence or absence of the disk in each disk mounting unit 5 and the position in the disk tray of each disk mounting unit 5 from the serial data provided from the parallel / serial register 70. do.

FIG. 7 is a waveform diagram showing an example of a signal for disc presence and position recognition in a disc position recognition apparatus of an optical disc changer system according to the present invention. FIG. 7 (a) is an output signal of a latch, and FIG. b) is an output signal of the parallel / serial 70 register according to the clock signal and the enable signal of the microcomputer 80.

If the first, third and fifth sensors 51, 53 and 55 for disc presence determination receive light generated from the light generators 40, 42 and 44, i.e., the disc is attached to the disc mounting portion 5; A low signal if no light is received, i.e. a high signal if a disk is present, and the second, fourth and sixth sensors 52, 54 and 56 receive a high signal if light is received. As shown in FIG. 7, the disk is mounted in the disk 1 and the disk 2 disks, the disk is not mounted in the disk 3, and the disk 1 is the current disk chucking position. It can be seen that.

Therefore, the present invention can recognize the presence or absence of the disc in the disc mounting portion and the position of each disc mounting portion without rotating the roulette, so the initial function of the optical disc changer system to quickly determine the presence of the disc and the current position of the disc after the function This has the effect of making it run more smoothly.

Claims (1)

A disk including a plurality of disk mounting portions 5 for mounting one disk each, and a roulette 1 for changing the position of the disk mounting portion 5 by rotating the disk mounting portion 5 in a predetermined direction. In the disc position recognition device of the optical disc changer system having a tray, Each disk mounting portion 5 provided in the roulette 1 is formed with a pair of holes for determining the presence or absence of a disk and a hole for determining the position of the disk mounting portion, The position determining hole of the first disk mounting portion of the disk mounting portions 5 is formed to be spaced apart from the hole for discriminating the presence or absence of the disk to allow a predetermined light to pass through each disk position of each of the other disk mounting portions. The discriminating hole is formed to be spaced apart from the disc for discriminating the presence or absence of the disc by a distance such that the predetermined light cannot pass therethrough, The same number of light generating parts 40 and 42 as the number of the disc mounting parts are provided on the lower surface of the main chassis 7 of the disc tray so as to face the respective disc presence or absence holes to generate the predetermined light. 44); On the upper surface of the roulette base (3) for supporting the roulette (1) is installed at a position opposite to the pair of holes of the first disk mounting portion, respectively, from the light generating portion (40, 42, 44) The number of light receiving sensors 51, 52, 53, 54, 55, 56 that detect the light provided through the 16, 17, 18, and generate the logic signal according to whether the light is detected or not. Wow; A latch (60) for latching logic signals provided from the respective light receiving sensors (51, 52, 53, 54, 55, 56) and outputting the parallel data respectively; A parallel / serial register (70) for converting parallel data output from the latch (60) into serial data and outputting the serial data; Disc position recognition device of the optical disc changer system including a microcomputer (8) which recognizes and discriminates the position of each disc mounting portion (5) and the presence or absence of a disc mounting from the serial data provided from the parallel / serial register (70). .