JP2003123439A - Optical disk player - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the unnecessary time spent till the start of playing to improve the convenience for a user with respect to an optical disk player with a disk changer. SOLUTION: A microcomputer 10 of an optical disk player 1 loads a disk D in a 0 deg. position in accordance with an indication input from an operation part 3 and searches for a focus on the front face of the disk D and unloads the disk D in the 0 deg. position in the case of a failure in focus search. Thereafter, the microcomputer 10 loads the disk D again after rotating a pickup unit 6A to a 180 deg. position and searches for a focus on the rear face. The microcomputer 10 terminates loading processing to start playing the disk D in the case of success in focus search. In the case of a failure in focus search, the microcomputer 10 unloads the disk D in the 180 deg. position and returns the pickup unit 6A to the 0 deg. position and performs loading processing of the next disk D.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disc reproducing apparatus with a disc changer for accommodating a plurality of optical discs and extracting a predetermined optical disc from the accommodated optical discs for reproduction.

[0002]

2. Description of the Related Art Conventionally, CD (Compact Disc), DVD
A disc reproducing apparatus is devised in which a plurality of optical discs (hereinafter referred to as discs D) such as (Digital Versatile Disc) for recording music and images are stored, and a specific disc is extracted from the stored discs and reproduced. Has been done.

FIG. 6 is a flow chart showing a loading process performed by the conventional optical disc reproducing apparatus before reproducing the disc D, and FIG. 7 is a flow chart of the pickup unit 6A in the loading process by the conventional optical disc reproducing apparatus shown in FIG. It is a figure which shows a state. Here, for simplification, only the disc D, the turntable 66 and the clamper 70 provided in the pickup unit 6A are shown.

In the loading process, the microcomputer incorporated in the conventional optical disc reproducing apparatus first loads the disc D (step S11).
(See FIGS. 7 (k) and (l)), pickup unit 6
Rotate A 90 degrees to make it horizontal (step S12)
(See FIG. 7 (m)), the disk D is focused (step S13). Here, the focus search is performed (step S14), and when the focus is applied (step S14; YES), the loading process is ended as it is. Below, the first position of the pickup unit 6A is set to 0.
A position rotated by 90 ° from the 0 ° position is called a 90 ° position, and a position rotated by 180 ° is called a 180 ° position.

When the focus is not applied in step S14 (step S14; NO), the pickup unit 6A is set at 18 with respect to the first loading position.
Rotate by 0 ° (step S15) (see FIG. 7 (n)),
The disk D is unloaded at the 180 ° position (step S16) (see FIG. 7 (o)). Next, the pickup unit 6A is rotated 180 ° and returned to the 0 ° position (step S17) (see FIGS. 7 (p), (q) and (r)). Then, unload the disc D to 0 °
Reload at the position (step S18) (FIG. 7)
(See (s)). Here, loaded disc D
The surface of is compared with the loading at step S11,
The front surface and the back surface are inverted.

Subsequently, the microcomputer rotates the pickup unit 6A to the 90 ° position to make it horizontal (step S19) (see FIG. 7 (t)), and performs focus search (step S20) (FIG. 7 (u). )reference). If focus is achieved (step S21; YE
S), the loading process ends. If the focus is not applied (step S21; NO), the disc D is unloaded (step S22), the next disc D is loaded (step S23), and the step S is performed.
Return to 13.

[0007]

However, as described above, in the conventional optical disc reproducing apparatus, in the loading process performed before reproducing the disc D, the pickup unit 6A is rotated to the 90 ° position and then the disc D is rotated. Since a focus search was being performed, it took an extra time before playback started.

[0008] Therefore, an object of the present invention is to shorten the extra time required for starting the reproduction in the optical disk reproducing apparatus with the disk changer and improve the convenience for the user.

[0009]

In order to solve the above problems, the present invention has the following features.

According to the present invention, there is provided a disk storage portion for storing a plurality of optical disks each having a signal surface on one side of which a signal is recorded,
An optical disc to be reproduced is extracted from the disc storage unit, the extracted optical disc is held at a loading position, and a holding mechanism rotatable while holding the optical disc is provided, and the signal is read from the signal surface. In the optical disc reproducing apparatus for reproducing, the first discriminating means for discriminating whether or not any one surface of the optical disc held by the holding mechanism at the loading position is a signal surface, and the first discriminating means, When it is determined that the one surface is not the signal surface, the optical disk is detached from the holding mechanism at the loading position and is housed in the disk housing portion, and the optical disk is housed by the housing means. When the holding mechanism is rotated and the optical disk is inverted with respect to the holding mechanism, A reversing holding means for holding the disc and whether the other surface of the optical disk is a signal surface at the loading position when the reversing holding means holds the optical disk in the holding mechanism at the loading position. If the one surface is determined to be the signal surface by the second determination means and the first determination means, or the other surface is determined to be the signal surface by the second determination means. In this case, a reproduction control means for reading a signal from the signal surface and reproducing the optical disc is provided.

The present invention is also characterized in that when the optical disc is reproduced, the optical disc is reproduced in a horizontal state.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an optical disk reproducing apparatus 1 according to the present invention will be described in detail below with reference to FIGS. The same components as those of the conventional optical disc reproducing apparatus are designated by the same reference numerals.

First, the structure will be described. FIG. 1 is a schematic diagram showing an overall configuration of an optical disc reproducing apparatus 1 according to an embodiment of the present invention. As shown in FIG. 1, the optical disc reproducing apparatus 1 is provided with an operation unit 3, a display unit 4, and a disc exchange door 5 on a front operation panel 2, and for example, a maximum of 400 optical discs ( Hereinafter, a rotary tray 61 (see FIG. 2) capable of storing a disc D)
Equipped with. The disc D has music and image signals recorded on only one side (hereinafter referred to as the signal side).

The operation unit 3 is an open key and a close key for operating the opening and closing of the disk exchange door 5, or various operation keys such as a play key, a stop key, a search key, and a numerical key for operating the reproduction and stop of the disk D. The group includes a group and outputs a depression signal of a depressed key to the microcomputer 10 (see FIG. 3).

The display unit 4 is composed of an LCD or the like and displays various display data output from the microcomputer 10. For example, the operation mode of the rotary operation of the rotary tray 61 (during rotational movement, during disk search, etc.), the open / closed state of the disk exchange door 5, the display of playback time, the disk D
The presence or absence of is displayed.

The disk exchange door 5 is a door that can be opened / closed, such as a forward-folding door that falls forward (outward), or a sliding door that opens / closes in a sliding manner from side to side. Rotary tray 6 inside with a part of the front opening
1 is exposed. Disc D for rotary tray 61 with disc exchange door 5 open
Can be replaced. This disk exchange door 5
Is driven by a door opening / closing motor 12 (see FIG. 3), and the door opening / closing motor 12 is a microcomputer 1.
It operates according to the opening / closing control signal supplied from 0.

FIG. 2 is a top view of the disk storage section 6 showing the schematic structure of the disk storage section 6 provided in the optical disk reproducing apparatus 1. As shown in FIG. 2, the disc storage unit 6 is configured by disposing a rotary tray 61, a disc sensor 63, a rotary tray motor 64, and a disc arm 65 on a substrate 62. A ring-shaped hollow portion inside the inner circumference of the rotary tray 61 is a reproducing position for reproducing the disc D, and a pickup unit 6A is provided.

Each component of the disk storage unit 6 is connected to the microcomputer 10 shown in FIG. 3 or each driver 12, 14, 15 for driving and controlling them. Also,
A disc exchange door 5 is provided on the front side of the lower side of the drawing, and the disc D stored in the rotary tray 61 can be exchanged by opening and closing the disc exchange door 5.

As shown in FIG. 2, the rotary tray 61
Is for holding and storing the disc D by standing the disc D on a turntable on which a plurality of grooves extending from the center in the radial direction, that is, the stocker 61A is formed, according to the grooves. 32 It is attached to the central part.

The rotary tray 61 is rotated by the power of the rotary tray motor 64. The rotary tray motor 64 rotationally drives the rotary tray 61 according to a drive control signal output from the rotary tray control motor driver 11 (see FIG. 3), and conveys each stocker 61A on the rotary tray 61 to an accurate conveyance position. To do.

The disk sensor 63 is composed of a photocoupler, and each stocker 61 of the rotary tray 61.
The presence or absence of the disk D placed on A is detected.

The rotary tray motor 64 rotationally drives the rotary tray 61 in accordance with a drive control signal output from the rotary tray control motor driver 11 (see FIG. 3), and each stocker 61A on the rotary tray 61.
To the correct transport position.

The disk arm 65 extracts one selected disk D from the rotary tray 61 in accordance with a control signal output from the disk arm control motor driver 14 (see FIG. 3), and places this disk D at the reproduction position. set. When the reproducing operation is completed, the original stocker 61A of the rotary tray 61 is stored again. The disc arm 65 has a function as a storage means.

The pickup unit 6A includes a turntable 66 and a motor 6 for rotating the turntable 66.
7, an optical pickup 68 movable in a direction perpendicular to the rotation axis of the turntable 66, an optical pickup moving mechanism 69 for moving the optical pickup 68 in a direction perpendicular to the rotation axis of the turntable 66, the turntable 6
The turntable 66 and the clamper 70 are provided with a clamper 70 that is movable toward and away from the turntable 66, and a contacting / separating mechanism (not shown) that moves the clamper 70 toward and away from the turntable 66.
The code or digital data recorded on the disk D clamped during the time is read and output to the DSP 15 (see FIG. 3). The pickup unit 6A has a function as an inversion holding means.

The pickup unit 6A is provided so that the rotation axis direction of the turntable 66 is substantially horizontal and substantially perpendicular to the rotation axis direction of the rotary tray 61.
The optical pickup 68 is for reading a signal recorded on the signal surface of the disc D, and includes the turntable 6
6 is parallel to the direction of the rotation axis. Then, the optical pickup 68 is moved in the radial direction of rotation of the turntable 66 by the optical pickup moving mechanism 69. Further, while the disc D is rotating, the optical pickup 68 is moved in the radial direction of the disc D by the pickup moving mechanism 69, and the optical pickup 68 focuses the signal surface of the disc D, and the optical pickup 6
8 reads the signal on disk D.

FIG. 3 is a schematic block diagram showing an internal circuit of the optical disc reproducing apparatus 1. As shown in FIG. 3, the optical disc reproducing apparatus 1 includes a microcomputer 10, an operating unit 3, a display unit 4, a disc sensor 63, a rotary tray motor 64, a rotary tray control motor driver 11 for driving and controlling the rotary tray motor 64, a door opening / closing motor 12. A door opening / closing motor driver 13 for driving and controlling the disk arm 65, a disk arm control motor driver 14 for driving and controlling the disk arm 65, and a DSP 15 for reproducing the disk D.
And a pickup unit 6A.

The microcomputer 10 operates the optical disc reproducing apparatus 1 in accordance with an operation signal input from the operation unit 3.
The operation of each unit is controlled, the processing result is stored in the RAM (not shown) in the microcomputer 10, and is displayed on the display unit 4. The controlled objects of the microcomputer 10 are the rotation operation of the rotary tray 61, the opening / closing operation of the disk exchange door 5, the disk transport operation of the disk arm 65, the reproduction operation of the disk D, and the disk sensor 6.
3, the presence / absence detection operation of the disk D, the driving of the display unit 4, and the like are included.

Further, the microcomputer 10 causes the disk sensor 63 to detect the presence or absence of the disk D when the power is turned on or when the disk exchange door 5 is closed, and based on each detection signal input from the disk sensor 63. The disk presence / absence data is acquired and stored in the RAM in the microcomputer 10. The microcomputer 10
Is a first discrimination means, a second discrimination means, a reproduction control means,
Has the function of.

Rotary tray control motor driver 11
Drives the rotary tray motor 64 based on the drive control signal output from the microcomputer 10 to rotate the rotary tray 61.

The door opening / closing motor driver 13 drives the door opening / closing motor 12 based on the opening / closing control signal output from the microcomputer 10, and the optical disk reproducing apparatus 1
The disc exchange door 5 provided on the operation panel 2 is opened and closed.

Disk arm control motor driver 14
Drives the disc arm 65 based on a control signal output from the microcomputer 10, and performs operations such as clamping the disc D by the disc arm 65 and transporting the disc D to the reproduction position.

DSP (Digital Signal Processor) 15
The coded digital data output from the pickup unit 6A is decoded by a decoding method corresponding to the recording method of the disc D, converted into a data format that the microcomputer 10 can process, and output to the microcomputer 10.

Next, the operation of the optical disk reproducing apparatus 1 to which the present invention is applied will be described. FIG. 4 shows an optical disc reproducing apparatus 1
Is a flowchart showing a loading process performed before reproducing the disc D, and FIG. 5 is a diagram showing a state of the pickup unit 6A in the loading process of FIG. Here, for simplicity, only the disk D, the turntable 66, and the clamper 70 are shown.

When the reproduction instruction is input from the operation unit 3, the microcomputer 10 of the optical disc reproducing apparatus 1 starts the loading process shown in FIG. 6 in accordance with the instruction input. First, the microcomputer 10 extracts the disc D to be reproduced, which has been instructed and input, from the stocker 61A of the rotary tray 61, clamps it between the turntable 66 and the clamper 70 by the contact / separation mechanism, and loads it (step S1) (FIG. 1). 5 (a)). At this time, the rotation axis of the turntable 66 is perpendicular to the rotation axis of the rotary tray 61. The initial position of this pickup unit 6A is set to the 0 ° position.

Next, the microcomputer 10 performs a focus search of the disc D (step S2).
When the disc D is focused (step S3; YES), the loading process is ended as it is (step S3; NO). When the disc D is not focused (step S3; NO), the pickup unit 6A is moved to the 0 ° position. Then, the disk D is unloaded and returned to the original stocker 61A (step S4) (see FIG. 5C).

Subsequently, the microcomputer 10 rotates the pickup unit 6A to the 180 ° position (step S5) (see FIGS. 5 (d), 5 (e) and 5 (f)). Then, the disc D to be reproduced is reloaded from the stocker 61A of the rotary tray 61 (step S6) (see FIG. 5 (g)). Where disk D
Is loaded in a state opposite to the loading direction in step S1, that is, with the front surface and the back surface reversed.

After loading, the pickup unit 6
The focus search of the disk D is performed with A kept at the 180 ° position (step S7) (see FIG. 5 (h)). Here, the disc D is in the opposite direction to the focus search in step S2
A is loaded. If the surface of the disk D for which the focus search is performed in step S2 is the front surface,
In step S7, a backside focus search is performed.

Next, the microcomputer 10 determines whether or not the focus search of the disc D is performed (step S8), and when the focus search is performed (step S8; YES), the loading process is ended as it is. On the other hand, if the focus search is not performed (step S8; NO), the pickup unit 6A is maintained at the 180 ° position to unload the disc D and return it to the original stocker 61A of the rotary tray 61 (step S9). And the pickup unit 6A
Is returned to the 0 ° position, the next disc D set by the input instruction from the operation unit 3 is taken out from the rotary tray 61 (step S10), and the process returns to step S2.

After the loading process is completed, the microcomputer 10 turns on the disk D and the turntable 6 that holds the disk D, as shown in FIGS. 5 (i) and 5 (j).
6 and the clamper 70 are rotated to the 90 ° position to start the reproduction of the disc D.

As described above, according to the above embodiment, the microcomputer 1 of the optical disc reproducing apparatus 1 is used.
In accordance with an instruction input from the operation unit 3, 0 loads the disc D at the 0 ° position, performs a focus search on the surface of the disc D, and unloads the disc D at the 0 ° position when no focus is applied. After that, the pickup unit 6A is rotated to the 180 ° position, the disc D is reloaded, and the back side focus search is performed. When the focus is applied, the loading process is ended and the reproduction of the disc D is started. When the focus is not applied, the disc D is unloaded at the 180 ° position, the pickup unit 6A is returned to the 0 ° position, and the next disc D is returned. The loading process is performed.

Therefore, according to the optical disc reproducing apparatus 1, the microcomputer 10 clamps the disc D and then moves the pickup unit 6A without moving the pickup unit 6A.
Since the focus search is immediately performed at the position where the disc D is clamped, the time required for detecting the signal surface of the disc D can be shortened. Therefore, it is possible to shorten the extra time required for the loading process of the disc D and improve the convenience for the user.

Further, by unloading the disc D and then rotating the pickup unit 6A, the weight of the entire pickup unit 6A during rotation can be reduced by the amount of the disc D as compared with the conventional optical disc reproducing apparatus. Since the rotation speed of the pickup unit 6A can be increased, the time required for the loading process can be further shortened.

It should be noted that the present invention is not limited to this embodiment, and can be modified as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, when the focus search on both sides of the disc D to be reproduced fails, the next disc D is loaded according to the setting input from the operation unit 3. The priority order of the disk D may be stored in advance in the RAM in the microcomputer 10, and the loading process of the next disk D may be performed according to the stored priority order.

In addition, the detailed configuration and detailed operation of the optical disc reproducing apparatus 1 according to the present embodiment can be appropriately changed without departing from the spirit of the present invention.

[0045]

Therefore, according to the present invention, it is possible to shorten the extra time required to start the reproduction of the disc D and improve the convenience for the user.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of an optical disc reproducing device 1 according to an embodiment of the present invention.

FIG. 2 is a top view of the disc storage portion 6 showing a schematic configuration of the disc storage portion 6 provided in the optical disc reproducing apparatus 1.

FIG. 3 is a schematic block diagram showing an internal circuit of the optical disc reproducing apparatus 1.

FIG. 4 is a flowchart showing a loading process performed by the optical disc reproducing apparatus 1 before reproducing the disc D.

5 is a diagram showing a state of a pickup unit 6A in the loading process of FIG.

FIG. 6 is a flowchart showing a loading process performed by the conventional optical disc reproducing apparatus before reproducing the disc D.

FIG. 7 is a diagram showing a state of a pickup unit 6A in a loading process by a conventional optical disc reproducing apparatus.

[Explanation of symbols]

1 Optical disc playback device 2 Operation panel 3 operation part 4 Display 5 Disc replacement door 6 Disk storage 6A pickup unit 11 Rotary tray control motor driver 12 Door opening / closing motor 13 Door open / close motor driver 14 Disk arm control motor driver 15 DSP 61 rotary tray 61A stocker 62 foundation 63 disk sensor 64 rotary tray motor 65 disk arm 66 turntable 67 motor 68 Optical pickup 69 Optical pickup moving mechanism 70 Clamper D disk

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Claims (2)

[Claims] 1. A disk storage unit for storing a plurality of optical disks each having a signal surface on one side of which a signal is recorded, an optical disk to be reproduced is extracted from the disk storage unit, and the extracted optical disks are held at a loading position. An optical disc reproducing apparatus for reading and reproducing the signal from the signal surface, comprising: a holding mechanism rotatable while holding the optical disc, wherein an arbitrary surface of the optical disc held by the holding mechanism at the loading position. And a holding mechanism for holding the optical disk at the loading position when the first discriminating means discriminates that the one surface is not the signal surface. And a storage unit for storing the optical disc in the disc storage unit, A holding mechanism for rotating the holding mechanism to hold the optical disc by the holding mechanism in a state where the optical disc is turned over with respect to the holding mechanism; and the holding mechanism for holding the optical disc at the loading position by the holding mechanism. Second discriminating means for discriminating whether or not the other surface of the optical disc is the signal surface at the loading position when the optical disc is held; and the one surface is the signal surface by the first discriminating means. If it is determined that there is a signal, or if the second determination unit determines that the other surface is a signal surface, a reproduction control unit that reads a signal from the signal surface and reproduces the optical disc is provided. An optical disk reproducing device characterized by the above. 2. The optical disk reproducing apparatus according to claim 1, wherein when the optical disk is reproduced, the optical disk is reproduced in a horizontal state.