KR100203690B1 - Method for controllong position of disk using disk indentification numbers in an optical disk changer system - Google Patents

Abstract

The present invention relates to a rotation position control method using an ID search of an optical disc changer system, and more particularly, to a rotation position control method using an ID search of an optical disc changer system, in which (a) if a predetermined inherent code is previously recognized, (B) detecting the ID pulse when the start / stop pulse is detected in the step (b) and recognizing the number of the low pulse of the ID pulse detected in the step (b) (D) determining if the rotation code of the turntable is a clockwise direction according to the rotation direction of the turntable if the preset unique code is not previously recognized in the step (A) The current unique code is recognized by incrementing the inherent code by 1 in accordance with the pulse or the start / stop pulse, and if the rotation direction of the turntable is counterclockwise, (E) recognizing the current unique code by decrementing the unique code by 1 in response to the ID pulse or the start / stop pulse, and (D) if the key signal requesting rotation direction change of the turn table is provided When the rotation direction of the turn table is maintained for a predetermined time and an intrinsic code corresponding to the start / stop pulse is detected, the rotation direction of the turn table is reversed.

Therefore, the present invention has the effect of searching for a desired disk by searching and recognizing the ID more easily and accurately regardless of the rotation direction of the turntable and regardless of the rotation direction.

Description

Rotational position control method using ID search of optical disc changer system

The present invention relates to an optical disc changer system, and more particularly, to an optical disc changer system in which a disc ID (Identification) for discriminating the position of a disc in an optical disc changer system is searched for, And a position control method.

A typical optical disc reproducing apparatus, that is, an optical disc player includes a compact disc player (CDP), a laser disc player (LDP) and a compact disc graphic player (CDGP) Recently, a digital video disc (DVD) using MPEG-2 moving picture compression technology has been developed, which is similar to the existing CD-like compact disc player (VCDP) Data of a gigabyte (GB) capacity including a moving image can be recorded and reproduced in a 12-cm optical disc, and there is a tendency to continue to develop it to improve its performance.

On the other hand, such optical disc players reproduce video and / or audio recorded on an optical disc and output it through a screen and / or a speaker, and have higher signal-to-noise ratios than conventional video and / And it can reproduce a signal with high quality and / or sound quality, does not generate noise due to irregular reproduction and modulation, has very few distortion, has no ghost (virtual), and has random accessibility. The trend is spreading.

In addition, as the performance and functions of such optical disk players are developed, the types of data recorded on the optical disk have been diversified. When the amount of data such as a movie is large, data corresponding to one movie is recorded on one disk In addition, it is inconvenient to use the disk in order to replace the disk with the desired disk at the time of use.

Accordingly, an optical disc changer system has been developed to improve these inconveniences. Such an optical disc changer system has been developed to mount a plurality of discs on one disc tray and selectively reproduce a desired disc sequentially or if necessary .

As described above, the optical disc changer system is provided with a disc tray manufactured to accommodate a plurality of discs. A plurality of discs may be mounted on the disc tray, and a turntable for rotating the discs may be provided do.

In addition, as described above, the turntable constituting the disk tray is rotated to perform a predetermined function, and the position of the plurality of disks fixedly disposed at predetermined positions on the upper surface of the turntable is changed in the disk tray .

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

1, a disk tray 100 in an optical disk changer system is provided with disk loading portions 5 and a plurality of disk loading portions 5 vertically coupled to a lower portion of the disk loading portions 5 via a predetermined axis The turntable 1 is provided.

On the other hand, IDs are assigned to the disk mounting portions 5 of the disk tray 100 in order to distinguish the disk mounting portions 5 from each other. For example, in FIG. 1, IDs 1, 2, and 3 are assigned to the three disk mounting portions 5, respectively. This facilitates a desired one of the disks mounted on the disk mounting portions 5 FIG. 4 is a block diagram illustrating a configuration of a rotational position control device in an optical disk changer system for controlling the rotational position by searching for the ID of the disk.

In Fig. 4, the turntable 1 is rotated forward or backward by driving the driving unit 210. [ The driving of the driving unit 210 is performed under the control of the control unit 220.

On the other hand, the ID detection sensor 230 is installed to face the rear surface of the turntable 1. As shown in FIG. 2, the ID detection sensor 230 generates a low pulse when the disk mounting portion 5 of the ID No. 1 is opposed to the disk mounting portion 5 of the ID No. 2, And generates three consecutive low pulses when the disk mounting unit 5 of the ID 3 is opposed to provide the low pulse to the controller 220. [

The control unit 220 counts the number of consecutive row pulses supplied from the ID detection sensor 230 and determines the ID of the disk mounting unit 5 opposed to the current ID detection sensor 230, The rotation position can be controlled.

That is, the driving unit 210 is controlled by the control unit 220, and the driving unit 210 rotates the turntable 1 in a predetermined direction. As the turntable 1 rotates, the disk mounting portions 5 provided on the upper portion of the turntable 1 are opposed to the ID detecting sensor 230 and the ID detecting sensor 230 is mounted on the turntable 1 when the disk mounting portions 5 are opposed to each other The control unit 220 counts the number of consecutive low pulses and outputs the counted number of consecutive low pulses to the current ID detection sensor 230 And the rotational position is controlled by discriminating the ID of the disk mounting portion 5 which is located opposite to the disk mounting portion 5, so that various functions such as reproduction of a desired disk can be performed.

On the other hand, as shown in FIG. 2, the ID detection sensor 230 includes consecutive row pulses indicative of an ID and consecutive four pulses indicative of a start / stop code between consecutive low pulses Thereby generating a low pulse. That is, the start / stop code is generated by inserting every predetermined ID between the disk mounting portions 5 of the rotating turntable 1, and is for distinguishing the end portion of the fixed ID from the beginning portion of the next ID.

In order to search for the ID of each disk loading unit 5, the rotation position control method using the disk ID search that operates in this way conventionally detects and detects the start / stop code by rotating the turntable 1 first Next, each time the ID pulse and the start / stop pulse are toggled, the ID of the disk loading section 5 is searched. As shown in FIG. 2, Thereby recognizing the rotational position.

A conventional method of controlling the rotational position by searching for a disc ID and recognizing a unique code is to rotate the turntable 1 in a predetermined direction at a time when the driving motor stops, If the rotation position pulse, that is, the ID pulse or the start / stop pulse, is toggled, an error is detected in the inherent code recognition. .

That is, if a reverse rotation request signal is input at the point 'A' as shown in FIG. 3, the 'A' point is substantially the inability to recognize the inherent code, and because of inertia due to the previous rotational direction, 5) stops at the point "B", it is impossible to recognize the inherent code by the toggle of the pulse at the point, and an error occurs in the inherent code recognition.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art, and it is therefore an object of the present invention to provide a disc drive, And a rotation position control method using an ID search of an optical disc changer system capable of controlling a rotation position.

According to a preferred embodiment of the present invention, there is provided an optical disc changer system including an optical disc changer for searching for a desired disc by searching for a current position of a disc using a disc ID A method for controlling a rotation position of a system using ID search, comprising the steps of: detecting a predetermined number of ID recognition pulses formed by different numbers of predetermined low pulse intervals; A start / stop pulse recognized as a corresponding low pulse is generated when the turntable rotates, all predetermined high and low pulse intervals have a preset unique code, (a) the predetermined unique code is previously recognized The turntable is rotated in the clockwise direction and the start / (B) detecting an ID pulse when the start / stop pulse is detected in the step (a); (c) detecting an ID pulse of the ID pulse detected in the step (b) Determining a unique code according to the rotational position by recognizing the number of the predetermined code in the turn table; (d) if the predetermined unique code is not previously recognized in the step (a) When the rotation direction is a clockwise direction, recognizes a current unique code by incrementing the inherent code by one according to the ID pulse or the start / stop pulse detected, and when the rotation direction of the turn table is counterclockwise, Recognizing the current unique code by decrementing the inherent code by 1 in accordance with the start / stop pulse; and (e) performing the rotation direction conversion of the turntable during the step (d) When the save key signal provided when by maintaining the present rotational direction for a predetermined time, the unique code in accordance with the start / stop pulse detector comprises a step of converting the direction of rotation of the turntable in the opposite direction.

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

FIG. 2 is a waveform diagram of an ID pulse and a start / stop pulse for recognizing the ID of the optical disc; FIG.

FIG. 3 is a waveform chart for explaining a recognition error of a unique code according to a toggle pulse when the turn direction of the turntable is switched. FIG.

FIG. 4 is a schematic block diagram of an ID search device of an optical disc changer system for searching an ID of a general optical disc changer system.

FIG. 5 is a flowchart of a rotational position control method using ID search of an optical disc changer system according to a preferred embodiment of the present invention. FIG.

FIG. 6 is a waveform diagram for explaining a method of recognizing a start / stop pulse and an ID pulse in a rotational position control method using an ID search of an optical disc changer system according to a preferred embodiment of the present invention;

7 is a detailed flowchart of the steps of the routine for increasing / decreasing the unique code in the start / stop or ID pulse signal toggle shown in FIG. 5;

FIG. 8 is a detailed flowchart of the processing routine steps for stabilizing rotation direction conversion shown in FIG. 5; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

100: disk tray 210:

220: control unit 230: ID detection sensor

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

FIG. 5 is a flowchart of a method of controlling a rotational position using a disc ID of an optical disc changer system according to a preferred embodiment of the present invention, which is an example of a 3-changer system. Referring to FIG. 5, the rotation position control method using the disc ID of the optical disc changer system according to the preferred embodiment of the present invention shown in FIG. 5 will be described with reference to the rotation position control apparatus of the optical disc changer system shown in FIG. 2 .

In step S10, the controller 220 determines whether there is a unique code previously recognized by the ID recognition pulse and the start / stop pulse detected according to the rotation of the turntable 1. If the control unit 220 has a unique code corresponding to the previously detected ID recognition pulse and the start / stop pulse in step S10, the process proceeds to step S40; otherwise, the process proceeds to step S20.

If there is no unique code previously recognized in step S10, the control unit 220 proceeds to step S20. In step S20, the controller 220 transmits a drive control signal to the drive unit 210 The driving unit 210 rotates the turntable 1 in a forward direction or a reverse direction, for example, in a clockwise direction or a counterclockwise direction, and rotates the turntable 1 in accordance with the ID recognition pulse and the start / stop pulse detected by the ID detection sensor 230 It recognizes the unique code of the point where each pulse is toggled, which is well illustrated by the detailed flow chart in Fig.

7, when the turn table 1 is rotated in step S21, the rotation direction of the turntable 1 is detected and discriminated in step S22. In this case, if it is clockwise, , And if it is counterclockwise, the process proceeds to step S23.

If it is determined in step S23 that the current ID code and the start / stop pulse are greater than 1, the process proceeds to step S23. In step S23, System, the inherent code is from 1 to 36 as shown in Fig. If it is determined in step S23 that the current unique code is greater than 1, the process proceeds to step S24. In step S24, the controller 220 transmits a unique code corresponding to the next pulse to be detected, It recognizes the number as a code number minus one and sets it back to the current code. If the current unique code recognized in step S23 is not greater than 1, the controller 220 recognizes the next unique code as 36 in step S25 and sets it again as the current code.

On the other hand, if it is determined in step S26 that the rotation direction of the turntable 1 is clockwise, the control unit 220 determines that the recognized current unique code is greater than 36 If it is determined in step S26 that the inherent code currently recognized is smaller than 36, the process proceeds to step S28, and otherwise proceeds to step S27. Then, in step S27, the ID recognition pulse or start / stop pulse to be detected next, and the unique code according to the toggle of these pulses are incremented by 1 in the current unique code, and then set to the current unique code. Further, in step S28, the controller 220 determines the recognized current code as 36, and again recognizes the next unique code number as 1 in step S29, and sets it again as the current unique code . When the step S20 is completed, the process proceeds to step S30. Step S30 is a process for stabilizing the turning direction of the turn table 1, The control unit 220 maintains the rotation direction until the start / stop pulse is detected and provided from the ID detection sensor 230. When the start signal is received from the ID detection sensor 230, Stop pulse is detected and provided, the rotation direction of the turntable 1 is stabilized by preventing the recognition error due to the inability to recognize the inherent code by changing the rotation direction at that point, as shown in the detailed flow chart in Fig. 8 .

8, in step S31 and step S32, the control unit 220 determines whether a key signal requesting conversion of the rotation direction of the rotating turntable 1 is provided. In step S31, If the rotation direction conversion key signal is provided in step S32, the current rotation direction of the turntable 1 is detected in step S33. If the current rotation direction of the turntable 1 is the clockwise direction in step S33, the process proceeds to step S35, and if it is counterclockwise, the process proceeds to step S34.

If the control unit 220 determines in step S34 that the rotation direction of the turntable 1 is the counterclockwise direction, the control unit 220 determines whether the ID detected by the ID detection sensor 230 The unique code conversion recognized by the pulse or start / stop pulse is distinguished from 6 to 5, 8 to 7, 16 to 15, 20 to 19, 28 to 27, or 34 to 34. This means that when the start / So as to maintain the rotation of the turntable 1 in the current rotation direction, that is, in the counterclockwise direction.

If it is determined in step S35 that the rotation direction of the turntable is clockwise in step S35, the control unit 220 determines whether the ID pulse detected by the ID detection sensor 230, It is determined whether the inherent code conversion recognized by the stop pulse is composed of 4 to 5, 6 to 7, 14 to 15, 18 to 19, 26 to 17, or 32 to 33, In order to maintain the rotation of the turntable 1 in the current rotation direction, that is, in the clockwise direction until the start / stop pulse is detected.

If both of the step S34 and the step S35 detect an intrinsic code in which the start / stop pulse is recognized in the current rotation direction, both steps S34 and S35 proceed to step S36. In step S36, The control unit 220 generates a control signal to the driving unit 210 to convert the front direction of the turn table 1 to the reverse direction in the current rotation direction.

The control unit 220 generates a control signal to the driving unit 210 in step S40 and outputs the control signal to the turn table 1 in step S40 Turn clockwise.

Thereafter, in step S50, the control unit 220 determines whether a start / stop pulse is detected. In addition, the control unit 220 determines whether a start / stop pulse is detected and provided in the ID detection sensor 230. [ However, according to the preferred embodiment of the present invention, as shown in FIG. 2, the start / stop pulse may be composed of four low pulses. When the start / stop pulse is detected in step S50, If the first low pulse of the stop pulse is recognized, the control unit 220 starts the counting by driving a built-in timer (not shown) in step S60 and outputs the counted number of times, for example, A start / stop pulse consisting of a low pulse is toggled for a period of time during which a single low pulse is toggled and maintained as a high pulse. If a pulse toggle occurs for the predetermined time in step S70, the flow returns to step S50 to re-execute the flow, and if not, the flow advances to step S80.

If the process proceeds from step S70 to step S80, the control unit 220 determines in step S80 that the previously detected start / stop pulse is the last pulse of the start / stop pulse consisting of a predetermined number of low pulses at the same interval do. That is, as shown in FIG. 6, the 'C' point is the last low pulse of the start / stop pulse section. When the 'C' point reaches the 'D' point, the time corresponding to the high section between the start / The pulse is not toggled, that is, the low pulse is not detected, so that the start / stop pulse section is recognized as being completed. When the step S80 is completed, the process goes to the step S90.

Since the start / stop pulse is recognized in steps S50 to S80, the control unit 220 determines whether a disc ID pulse is provided from the ID detection unit 230 in step S90. In step S90, when the ID pulse is detected, the ID pulse is made up of one or more equal-interval low pulses according to a predetermined number of the disc, respectively, so that the control unit 220 performs step S100 as in step S70. The count starts counting for a predetermined time after the timer is set, and in step S110, one or more ID recognition pulses at the same interval correspond to a predetermined time, that is, a time corresponding to a high section of the ID pulse, It is determined whether the next ID pulse is again detected during the time corresponding to the interval between the ID pulse and the next ID pulse.

In step S110, if the pulse is not toggled for a predetermined time counted by the counter, that is, if the next ID pulse is not detected, the control unit 220, in step S120, In step S130, the number of detected ID recognition pulses for recognizing one disk is stored. That is, as shown in FIG. 6, if the next low pulse is not detected until it reaches the point 'F' after passing the 'E' low pulse point of the ID recognition pulse, that is, the high pulse is not toggled to the low pulse , The 'E' pulse is recognized as the last low pulse in the ID recognition pulse section. On the other hand, if the low pulse low toggle is made in step S110, the flow returns to step S90 to re-execute the flow.

In steps S140 to S180, a unique code is determined according to how many ID recognition pulses are detected in steps S90 to S130. In step S140, The unique code is recognized as 7 in step S150 and the current unique code is recognized as 19 in step S160 if the ID pulse detection number is 2. If the ID pulse detection number is 3 in step S180 And recognizes the inherent code as 33.

Therefore, the present invention has the effect of searching for a desired disk by searching and recognizing the ID more easily and accurately regardless of the rotation direction of the turntable and regardless of the rotation direction.

Claims (1)

A method of controlling a rotational position using an ID search of an optical disc changer system for searching a desired disc by searching for the current position of the disc by using a disc ID (identification) detected during a turntable rotation in an optical disc changer system, And a start / stop pulse recognized as a low pulse corresponding to an integer multiple of the ID recognition pulse between the ID recognition pulse and the ID recognition pulse are supplied to the turntable And a predetermined unique code exists in each of all the high and low pulse sections, and (i) the predetermined unique code is previously recognized and the start / stop pulse is generated while rotating the turntable in the clockwise direction, ; (B) detecting the ID pulse when the detection of the start / stop pulse is completed in the step (a); (C) recognizing the number of low pulses of the ID pulse detected in the step (b), thereby discriminating the inherent code according to the rotation position; (D) if the predetermined unique code is not previously recognized in the step (a), the ID pulse or the start / stop pulse, which is detected if the rotation direction of the turntable is clockwise in accordance with the rotation direction of the turntable, By incrementing the inherent code by 1, the current unique code is recognized, and if the rotation direction of the turn table is counterclockwise, the inherent code is decreased by 1 in accordance with the ID pulse or the start / ; (E) If a key signal requesting rotation direction change of the turntable is provided during the step (d), if the current rotation direction is maintained for a predetermined time and a unique code according to the start / stop pulse is detected, And converting the rotation direction of the optical disc changer system to a reverse direction.