JP2003132612A - Information recording and/or reproducing device and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information recording and/or reproducing device capable of keeping loading operation time constant and its control method regarding an information recording and/or reproducing device having a loading mechanism and its control method. SOLUTION: The control method of the information recording and/or reproducing device having loading mechanisms 11, 12 is characterized in that the operation time of the loading mechanisms 11, 12 is measured, and the loading mechanisms 11, 12 are controlled so as to set the measured operation time within a predetermined range.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording and / or reproducing apparatus and a control method thereof, and more particularly to an information recording and / or reproducing apparatus having a loading mechanism and a control method thereof.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram of an optical disk device.
5A shows a configuration diagram when the disc tray is opened, and FIG. 5B shows a configuration diagram when the disc tray is stored.

An optical disk device 10 having a replaceable recording medium.
0 indicates that the eject button 10 is pressed after the optical disc 101 is placed on the disc tray 102 as shown in FIG.
By operating 3, the disc tray 102 is pulled into the device as shown in FIG. 5B, and the optical disc 101 is mounted at a predetermined position inside the device. At this time, conventionally, a predetermined drive voltage has been applied to the loading motor that drives the disc tray 102. The drive voltage is set so that the disc tray 102 opens and closes at a preset time.

[0004]

However, in the conventional optical disk device, the drive voltage of the actuator of the loading mechanism is a predetermined voltage regardless of the individual device. Therefore, when the operation of the loading mechanism varies among the individual devices or when the operation of the loading mechanism changes due to a change with time, the loading operation time varies. For example, from the state of FIG. 5A to the state of FIG. 5B or from the state of FIG.
If there is variation in the time until the state (A) is entered, there is a problem that the user may feel uneasy about the quality of the product.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an information recording and / or reproducing apparatus and a control method thereof that can make the loading operation time constant.

[0006]

The present invention provides a method for controlling an information recording and / or reproducing apparatus (1) having a loading mechanism (11, 12), wherein the loading mechanism (1
It is characterized in that the operation time of (1, 12) is measured and the loading mechanism (11, 12) is controlled so that the measured operation time falls within a predetermined range.

Further, according to the present invention, the measurement operation time (t
(K)) and the reference operation time (t0) deviation (et)
(K)), deviation (et (k)) and previous deviation (et)
(K−1)) and the difference (Δet (K)) from the driving mechanism (11, 12) to obtain the increase / decrease amount (Vaij) of the driving force (V (k)), and the obtained driving force. (V
The driving force (V (k + 1)) of the next loading mechanism (11, 12) is controlled based on the increase / decrease amount (Vaij) of (k)).

Further, the present invention is characterized in that the driving force of the loading mechanism is driven with the same driving force as this time when the operating time exceeds a predetermined limit range set in advance.

According to the present invention, the loading operation time can be made constant by measuring the loading operation time and controlling the operation time so that the operation time becomes constant. Therefore, the user's confidence in the quality of the apparatus is improved. be able to.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION An optical disk device will be described as an example of the information recording and / or reproducing device of the present invention.

FIG. 1 shows a block diagram of an embodiment of the present invention.

The optical disk device 1 of this embodiment includes a disk tray 11, a loading motor 12, a turntable 13, a spindle motor 14, an optical pickup 15, a guide rail 16, a thread motor 17, and a driver 18 to 18.
20, analog signal processing unit 21, digital signal processing unit 22, CPU 23, open sensor 24, closed sensor 25, RO
It is configured to include an M26 and an eject button 27.

The optical disc 10 is mounted on the disc tray 11 in an open state. The disc tray 11 can be moved in the direction of arrow A by a loading motor 12. When the eject button 27 is operated with the optical disc 10 mounted on the disc tray 11, the disc tray 11 is pulled into the apparatus by the loading motor 12. When the disc tray 11 is pulled inside the device, the optical disc 10 engages with the turntable 13.

The turntable 13 is fixed to the rotary shaft of the spindle motor 14, and the spindle motor 14
Is rotated according to the rotation of. The optical disk 10 is rotated by rotating the turntable 13 by the spindle motor 14.

The optical disk 10 is the turntable 1
When the optical pickup 15 is mounted on the optical disc 1,
It is arranged to face 0. The optical pickup 15 is guided by the guide rail 16 so as to be movable in the arrow A direction, that is, in the radial direction of the optical disc 10, and is moved in the arrow A direction by the sled motor 17.

The optical pickup 15 emits laser light based on a drive signal from the driver 18. The laser light emitted from the optical pickup 15 is applied to the optical disc 10. The laser light applied to the optical disc 10 is
During recording, the intensity changes according to the recording signal, and during reproduction, the intensity is controlled to be a predetermined intensity. The light is reflected by the optical disk 10 and is incident on the optical pickup 15 again. The optical pickup 15 detects the reflected light from the optical disc 10 by a multi-division photo detector and supplies it to the analog signal processing unit 21.

The analog signal processing section 21 extracts a reproduction signal, a tracking error signal, and a servo signal including a focus error signal from the detection signal from the optical pickup 15. The analog signal processing unit 21 also supplies a laser control signal to the driver 18.

The reproduced signal, the servo signal including the tracking error signal, and the focus error signal extracted by the analog signal processing unit 21 are processed by the digital signal processing unit 22.
Is supplied to. The digital signal processing unit 22 controls the driver 20 based on the tracking error signal. The driver 20 drives the sled motor 17 and the actuator of the optical pickup 15. The digital signal processing unit 22 controls the driver 19 to control the rotation of the spindle motor 14. In addition, the digital signal processing unit 2
Reference numeral 2 decodes the reproduction signal, generates reproduction data, supplies the reproduction data to the host device, and encodes the recording data from the host device and supplies the encoded data to the analog signal processing unit 21.

The CPU 23 controls the processing of the entire apparatus by the firmware stored in the ROM 26. CPU
An open sensor 24 for detecting the open state of the disc tray 11, a close sensor 25 for detecting the closed state of the disc tray 11, and an eject button 27 for instructing the opening and closing of the disc tray 11 are connected to 23. . CPU
Reference numeral 23 controls the loading motor 12 based on the detection results of the open sensor 24 and the close sensor 25 and the operation of the eject button 27 to control the operation of the disc tray 11, that is, the loading operation.

FIG. 2 shows a flowchart of the loading process by the CPU 23.

When a command for opening and closing the disc tray 11 is supplied from the outside, the loading process is executed. In the loading process, first, a loading measuring timer is started in step S1-1. Next, in step S1-2, the loading motor 12 is driven to move the disc tray 11 in the arrow A1 direction or the arrow A2 direction.

In step S1-3, it is determined whether or not the loading operation is completed. The end of the loading operation in step S1-3 is determined by the detection signals of the open sensor 24 and the close sensor 25. For example, disc tray 1
When 1 is closed, it is determined that the loading operation is completed when the detection signal of the closing sensor 25 becomes valid. Further, when the disc tray 11 is opened, when the detection signal of the open sensor 24 becomes valid, it is determined that the loading operation is completed.

When the loading operation is completed in step S1-3, the loading motor 17 is loaded in step S1-4.
To stop. When the loading motor 17 is stopped in step S1-4, the loading time measuring timer is stopped in step S1-5.

When the loading time measuring timer is stopped in step S1-5, the time taken for loading is acquired from the time measured by the loading time measuring timer in step S1-6, and is loaded in step S1-7. Loading motor 1
The drive voltage of No. 7 is determined and stored in the ROM 26.

Next, the drive voltage determination process will be described.

FIG. 3 shows a flowchart of the drive voltage determination process.

First, in step S2-1, step S1
The deviation et from the loading time obtained in -6 and the loading time measured at the previous loading
Find (k).

As for the deviation et (k), the time required for the current operation is t (k) and the time required for the previous operation is t (k).
Assuming that (k-1) and the reference time of the loading operation are t0, the deviation et (k) can be expressed as et (k) = t0-t (k) (1).

Next, in step S2-2, the deviation et
It is determined whether or not (k) is within a predetermined range Av [(et (k-1)) ± α around the previous average value Av [(eT (k-1)).

When it is determined in step S2-2 that the predetermined range is exceeded, it is determined that the deviation et (k) suddenly increases due to some disturbance during loading, and in step S2-3 the previous The driving voltage V (k−1) is set to the next driving voltage V (k + 1) of the loading motor 17.
Is stored in the ROM 26.

Further, in step S2-2, the deviation et (k)
Is determined to be within the predetermined range Av [(et (k-1)) ± α, in step S2-4, step S2-4
The deviation et (k) obtained in 2-1 and the deviation e obtained last time
The difference Δet (k) from t (k−1) is obtained.

The difference Δet (k) between the deviations is   Δet (k) = et (k) -et (k-1) (2) Can be expressed as

Next, in step S2-5, step S2
Difference Δet (k) obtained in step -4 and step S2-
The increase / decrease voltage Vaij is acquired from the deviation et (k) obtained in 1.

FIG. 4 is a diagram for explaining the increasing / decreasing voltage determination operation.

The increase / decrease voltage is determined from the deviation et (k) and the difference Δet (k) of the deviation according to the rule shown in FIG.

For example, when the deviation et (k) is "-1" or less and the difference Δet (k) of the deviation is "-0.2" or less, the increase / decrease voltage is Va11. Also, the deviation et
When both (k) and the difference Δet (k) of the deviation are “0”, the increase / decrease voltage is Va33 (= 0). The deviation e
The t (k) and the difference Δet (k) between the deviations are arbitrary constants selected by the designer.

When the increase / decrease voltage Vaij is obtained in step S2-5, the next driving voltage V (k + 1) of the loading motor 17 is obtained in step S2-6. The driving voltage V (k + 1) for the next loading motor 17 is V (k + 1) = V (k), where Vaij is the increase / decrease voltage acquired in step S2-5 and V (k) is the driving voltage for the loading motor 17 this time. ) + Vaij (3)

Next, in step S2-7, step S2
The next drive voltage V (k + 1) of the loading motor 17 obtained in -6 is stored in the ROM 26.

For example, the target time of the loading operation is 2
Although it is 2 seconds, it is assumed that the loading operation of this time took 2.7 seconds. At this time, the deviation et (k) is (2.7-2) = 0.7 seconds from the equation (1).

Here, the previous deviation et (k-1) is 1.
If it is 0, the difference Δet (k) of the deviation is (0.7−1.0) = − 0.3 from the equation (2).

Therefore, the deviation e from the rule shown in FIG.
t (k) = 0.7, deviation difference Δet (k) = − 0.3
The increase / decrease voltage Va14 corresponding to is acquired. Therefore, the next drive voltage V (k + 1) becomes [V (k) + Va14] obtained by adding the increase / decrease voltage Va14 to the drive voltage V (k) of this time.

Next time, the loading motor 12 is driven by the drive voltage V (k + 1) stored in the ROM 26 in step S2-7.
Is driven.

According to this embodiment, the loading operation time is measured, and the operation time is controlled to be constant, so that the loading operation time is kept constant regardless of changes in individual devices and devices over time. it can. Therefore, it is possible to improve the user's confidence in the device.

In the present embodiment, the optical disk device has been described as an example, but the present invention is not limited to the optical disk device, and a magnetic disk device for performing a loading operation,
The present invention can be applied to general devices such as tape devices that perform a loading operation.

[0045]

As described above, according to the present invention, the loading operation time can be made constant by measuring the loading operation time and controlling it so that the operation time becomes constant. It has features such as improved reliability.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a flowchart of a loading process according to an embodiment of the present invention.

FIG. 3 is a flowchart of a loading motor drive voltage determination process according to an embodiment of the present invention.

FIG. 4 is a diagram for explaining a method of determining a voltage increase / decrease according to an embodiment of the present invention.

FIG. 5 is a configuration diagram of an optical disc device.

[Explanation of symbols]

1 Optical disk device 11 Disc tray 12 Loading motor 13 turntable 14 Spindle motor 15 Optical pickup 16 Guide rail 17 thread motor 18, 19, 20 driver 21 Analog signal processor 22 Digital signal processor 23 CPU 24 open sensor 25 Closed sensor 26 ROM

Claims (6)

[Claims] 1. An information recording and / or reproducing apparatus having a loading mechanism, a drive unit for driving the loading mechanism, an operation time measuring unit for measuring an operation time of the loading mechanism, and a measurement by the operation time measuring unit. An information recording and / or reproducing apparatus, comprising: a control unit that controls the drive unit so that the operated time is within a predetermined range. 2. The deviation calculating unit calculates the deviation between the operation time measured by the operation time measuring unit and the reference operation time, and the deviation calculated by the deviation calculating unit and the deviation calculated last time. A deviation difference calculation unit that calculates a difference between the deviation and an increase / decrease voltage acquisition unit that acquires an increase / decrease in the driving voltage based on the deviation calculated by the deviation calculation unit and the deviation difference calculated by the deviation difference calculation unit, A driving voltage creating unit that creates the next driving voltage by adding the increasing / decreasing voltage acquired by the increasing / decreasing voltage acquiring unit to the current driving voltage, and based on the driving voltage created by the precursor driving voltage creating unit, The information recording and / or reproducing apparatus according to claim 1, wherein the information recording and / or reproducing apparatus is controlled by a driving unit. 3. The control unit drives the drive unit with the same driving force this time when the operation time measured by the operation time measurement unit exceeds a predetermined limit range set in advance. The information recording and / or reproducing apparatus according to claim 1 or 2. 4. A method of controlling an information recording and / or reproducing apparatus having a loading mechanism, which measures an operating time of the loading mechanism and controls the loading mechanism so that the measured operating time falls within a predetermined range. Information recording characterized by
Alternatively, a method for controlling the playback device. 5. The increase / decrease of the driving force of the loading mechanism is acquired based on the difference between the measured operation time and the reference operation time and the difference between the deviation and the previous deviation, and the acquired drive force is increased or decreased. The control method of the information recording and / or reproducing apparatus according to claim 4, wherein the driving force of the next loading mechanism is controlled based on the amount of increase or decrease. 6. The information according to claim 4, wherein when the operating time exceeds a preset limit range, the driving force of the loading mechanism is driven with the same driving force as this time. Control method for recording and / or reproducing apparatus.