JP2011040119A - Optical disk device, motor control method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disk device, a motor control method, and a program for preventing slipping of a disk even in a low-humidity environment. <P>SOLUTION: The optical disk device provided with a spindle motor for rotating a turntable for placing an optical disk detects humidity in the device, and controls the time required to accelerate or decelerate the spindle motor on the basis of the detected humidity. Specifically, when the humidity detected by a humidity detection sensor is not lower than a predetermined value, a rotation instruction signal based on a first voltage value is supplied to a motor driver which controls the spindle motor. When the humidity is lower than the predetermined value, a rotation instruction signal based on a second voltage value lower than the first voltage value is supplied to the motor driver, thereby controlling the time required to accelerate or decelerate the spindle motor. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an optical disc device, a motor control method, and a program.

Conventionally, an optical disc apparatus has been widely used for recording and reproducing video signals and audio signals.
FIG. 12 is a cross-sectional view showing a schematic configuration of an optical disc apparatus 200 according to the prior art.
As shown in FIG. 12, the front panel of the case 1 forming the housing of the optical disc apparatus 200 is provided with an insertion slot 2 for inserting the disc D. The case 1 is continuous with the insertion slot 2. The transport path is formed.
A sensor 3 is installed in the case 1 corresponding to the insertion slot 2, and the disk D is in a predetermined storage position by detecting the end position of the disk D inserted into the insertion slot 2. Is supposed to be detected. When the disk D is stored in a predetermined storage position, the spindle motor 4 is driven to rotate the turntable 5 and the disk D placed on the upper surface of the turntable 5.
Inside the case 1, a silicon rubber transport roller 6 a and a disk guide 6 b are provided so as to sandwich the disk D from the upper surface and the lower surface thereof. Among these, the conveyance roller 6 a which is a driving roller is configured to rotate according to the driving of the loading motor 7.

In recent years, optical disks have been increased in capacity and speed, and a spindle for rotating a disk portion of an optical disk in response to an increase in the capacity of an optical disk represented by a Blu-ray Disc and customer requests. The rotational speed of the motor is increasing. Further, as a need from the user, since the shortening of the start-up time has a high priority, the conventional optical disc drive applies a large torque to the spindle motor at the time of reproduction or stop.
Hereinafter, the spindle motor control system will be described with reference to FIG.

  As shown in FIG. 13, the spindle motor 4 uses a motor driver 9 to control the rotation speed. The motor driver 9 uses an intermediate voltage of the supplied power supply voltage as a reference voltage, and performs an acceleration operation when the rotation command signal sent from the control unit 8 is higher than the reference voltage, and performs a deceleration operation when it is low. This is shown in FIG. 14A shows the output transition of the rotation command signal, and FIG. 14B shows the transition of the rotation speed of the spindle motor.

As shown in FIG. 14, when the rotation command signal is higher than the reference voltage 1.65V, the spindle motor 4 is accelerated, and when it is lower, the spindle motor 4 is decelerated. Further, the greater the absolute value of the input signal from the reference voltage 1.65 V, the greater the torque generated on the spindle motor 4.
Normally, the maximum rotation command signal is output when the disc is changed from the stop state to the reproduction state and when the disc is changed from the reproduction state to the stop state.

  Conventionally, an anti-slip sheet or the like has been attached between the disk and the turntable. However, due to the higher density and higher speed of the disk, the rotation of the disk has increased, and the acceleration at the time of rotation acceleration and deceleration has increased. In such a case, if dust or the like adheres between the disc and the turntable, there is a risk that disc slip will occur. In particular, disc slip is likely to occur when the humidity in the air is low.

In order to cope with such a problem, for example, Patent Document 1 discloses a technique for effectively preventing a slip generated between an optical disc and a turntable.
Specifically, when acceleration / deceleration of the spindle motor accompanying the movement of the optical pickup occurs, if the distance to move the optical pickup is greater than a predetermined value, the control to limit the distance to move the optical pickup to a predetermined value or less I do. By doing so, the torque at the time of accelerating / decelerating the spindle motor can be reduced, so that the occurrence of slip can be prevented.

JP 2005-149653 A

  As shown in FIG. 15, when performing the reproducing operation and the stopping operation of the disc D, a frictional force is generated between the inner peripheral portion of the disc D and the clamp portion C of the turntable 5. At this time, for example, if there is a burr or the like on the inner peripheral portion of the disk D, scraps (polycarbonate powder) may be generated. As the generated polycarbonate powder collects between the data surface of the disk D and the turntable sheet S, the frictional force gradually weakens and a disk slip phenomenon occurs. This is shown in FIG. Compared to FIG. 16A in which the generated polycarbonate powder P is small, FIG. 16B in which a large amount of polycarbonate powder P is sucked and collected due to the effect of static electricity E has a greater degree of disc slip. Due to this disc slip, a larger frictional force is generated between the inner periphery of the disc and the clamp portion, so that polycarbonate powder is further generated and the amount of disc slip increases further. In particular, since more static electricity is generated in a low-humidity environment, the increase in the amount of disc slip is accelerated. In some cases, the frictional force becomes too weak, and the disk D cannot be reproduced without sufficient acceleration, or even if the turntable 5 stops rotating, the disk D continues to rotate, so the ejection operation is performed. In some cases, the disc D is damaged.

  Patent Document 1 described above is a technique for preventing slipping by reducing the torque generated by limiting the moving distance of the optical pickup when accelerating / decelerating the spindle motor as the optical pickup moves. It does not correspond to the disc slip that occurs during the playback operation and the stop operation.

  An object of the present invention is to provide an optical disc apparatus, a motor control method, and a program that can prevent disc slip even in a low humidity environment.

  The invention described in claim 1 is made in order to achieve the above object, and in an optical disc apparatus provided with a spindle motor for rotating a turntable for placing an optical disc, humidity for detecting humidity in the apparatus. And detecting means, and control means for controlling the time required for acceleration / deceleration of the spindle motor based on the humidity detected by the humidity detecting means.

  According to a second aspect of the present invention, in the optical disc apparatus according to the first aspect, the optical disk apparatus further includes a motor driver that controls the spindle motor, wherein the control means has a humidity detected by the humidity detection means equal to or greater than a predetermined value. Is supplied to the motor driver, and if it is less than a predetermined value, a rotation command signal having a second voltage value lower than the first voltage value is supplied to the motor driver. The time required for acceleration / deceleration of the spindle motor is controlled by supplying the motor driver.

  According to a third aspect of the present invention, in the optical disc apparatus according to the first aspect, the optical disk apparatus further includes a motor driver that controls the spindle motor, and the control means is configured such that the humidity detected by the humidity detection means is a first value. If it is greater than or equal to a predetermined value, a rotation command signal based on a first voltage value is supplied to the motor driver, and is greater than or equal to a second predetermined value smaller than the first predetermined value and less than the first predetermined value. In this case, a rotation command signal having a second voltage value lower than the first voltage value is supplied to the motor driver, and when the rotation command signal is less than the second predetermined value, the second voltage value lower than the second voltage value is supplied. The time required for acceleration / deceleration of the spindle motor is controlled by supplying a rotation command signal having a voltage value of 3 to the motor driver.

  According to a fourth aspect of the present invention, in the optical disc apparatus according to the first aspect, the optical disk apparatus further includes a motor driver that controls the spindle motor, wherein the control means has a humidity detected by the humidity detecting means as a first value. When it is equal to or greater than a second predetermined value that is greater than a predetermined value, a rotation command signal based on a third voltage value that is higher than the first voltage value is supplied to the motor driver, A rotation command signal based on the first voltage value is supplied to the motor driver if it is less than a predetermined value of 2, and if it is less than the first predetermined value, the rotation command signal is lower than the first voltage value. A time required for acceleration / deceleration of the spindle motor is controlled by supplying a rotation command signal having a voltage value of 2 to the motor driver.

  The invention according to claim 5 is a motor control method in an optical disc apparatus provided with a spindle motor for rotating a turntable for placing an optical disc, the step of detecting humidity in the apparatus by humidity detecting means, And a step of controlling a time required for acceleration / deceleration of the spindle motor based on the detected humidity by a control means.

  According to a sixth aspect of the present invention, there is provided an optical disk device computer including a spindle motor that rotates a turntable for mounting an optical disk on the basis of humidity detected by humidity detection means that detects humidity in the device. This is a program for functioning as control means for controlling the time required for acceleration / deceleration of the spindle motor.

  According to the present invention, it is possible to provide an optical disc apparatus, a motor control method, and a program that can prevent disc slip even in a low humidity environment.

1 is a cross-sectional view showing a schematic configuration of an optical disc apparatus 100 according to the present embodiment. It is the block diagram shown about the control system of the spindle motor 4 which concerns on this embodiment. It is the figure shown about the relationship between the rotation command signal at the time of controlling rotation of the spindle motor 4 which concerns on this embodiment, and the rotation speed of a motor. 5 is a flowchart showing an example of an optical disc rotation control process (optical disc rotation control process 1) performed in the optical disc apparatus 100 according to the present embodiment. It is an example of the table | surface shown about the relationship between the humidity and drive voltage which concern on 1st Embodiment. 6 is a flowchart showing an example of an optical disc rotation control process (optical disc rotation control process 2) performed in the optical disc apparatus 100 according to the present embodiment. It is the figure shown about the relationship between the rotation command signal at the time of controlling rotation of the spindle motor 4 which concerns on 2nd Embodiment, and the rotation speed of a motor. It is an example of the table | surface shown about the relationship between the humidity and drive voltage which concern on 2nd Embodiment. 6 is a flowchart showing an example of an optical disc rotation control process (optical disc rotation control process 3) performed in the optical disc apparatus 100 according to the present embodiment. It is the figure shown about the relationship between the rotation command signal at the time of controlling rotation of the spindle motor 4 which concerns on 3rd Embodiment, and the rotation speed of a motor. It is an example of the table | surface shown about the relationship between the humidity and drive voltage which concern on 3rd Embodiment. It is sectional drawing which shows schematic structure of the optical disk apparatus 200 based on a prior art. It is the block diagram shown about the control system of the spindle motor 4 which concerns on a prior art. It is the figure shown about the relationship between the rotation command signal at the time of controlling rotation of the spindle motor 4 which concerns on a prior art, and the rotation speed of a motor. FIG. 6 is a view showing a state in which a frictional force is generated between the inner peripheral portion of the disc D and the clamp portion C of the turntable 5 as the disc D rotates. It is the figure shown about the relationship between the amount of polycarbonate powder, and the slip amount.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a cross-sectional view showing a schematic configuration of an optical disc apparatus 100 according to the present embodiment.
As shown in FIG. 1, an insertion slot 2 for inserting a disk D is provided in the front panel of the case 1 that forms the housing of the optical disc apparatus 100, and the insertion slot 2 is continuous inside the case 1. The transport path is formed.

FIG. 1 shows a state in which the disk D has been transported to a predetermined storage position. A sensor 3 is installed in the case 1 corresponding to the insertion slot 2, and the disk D is in a predetermined storage position by detecting the end position of the disk D inserted into the insertion slot 2. Is supposed to be detected. When the disk D is stored in a predetermined storage position, the spindle motor 4 is driven to rotate the turntable 5 and the disk D placed on the upper surface of the turntable 5.
The control system of the spindle motor 4 will be described later with reference to FIG.

Inside the case 1, a silicon rubber transport roller 6 a and a disk guide 6 b are provided so as to sandwich the disk D from the upper surface and the lower surface thereof. Among these, the conveyance roller 6 a which is a driving roller is configured to rotate according to the driving of the loading motor 7.
In addition, the optical disc apparatus 100 includes a humidity detection sensor 10 (humidity detection means) for detecting the humidity in the case 1. The humidity information detected by the humidity detection sensor 10 is output to the control unit 8 described later in FIG.

  When the disk D is inserted from the insertion slot 2, the sensor 3 outputs a detection signal indicating the insertion of the disk D to the control unit 8, and the control unit 8 drives the loading motor 7 to rotate forward according to the detection signal. The disk D enters the back of the case 1 along the transport path inside the case 1 as the transport roller 6a rotates while being sandwiched between the transport roller 6a and the disk guide 6b. When the sensor 3 detects the rear end of the disk D, the controller 8 stops driving the loading motor 7 in accordance with the detection signal. Thereby, the disk D is conveyed from the insertion port 2 to a predetermined accommodation position, and is held at that position.

  Further, when the control unit 8 receives the ejection signal of the disk D, the control unit 8 reversely drives the loading motor 7 to convey the disk D to the insertion port 2 of the case 1. At this time, the loading motor 7 is stopped when the front end of the disk D is ejected from the insertion slot 2. In this series of insertion / ejection operations, the transport roller 6a and the disk guide 6b are pressed against the disk D, and a frictional force is generated between the disk D and the transport roller 6a.

FIG. 2 is a block diagram showing a control system of the spindle motor 4 according to the present embodiment.
As shown in FIG. 2, the spindle motor 4 uses a motor driver 9 to control the rotation speed. The motor driver 9 sets the intermediate voltage of the voltage value of the supplied rotation command signal (here 3.3V) as the reference voltage (here 1.65V), and the rotation command signal sent from the control unit 8 When the voltage value is higher than the reference voltage, acceleration operation is performed, and when the voltage value is low, deceleration operation is performed. This is shown in FIG. 3A shows the output transition of the rotation command signal, and FIG. 3B shows the transition of the rotation speed of the spindle motor.

As shown in FIG. 3, when the voltage value of the rotation command signal is higher than the reference voltage 1.65V, the spindle motor 4 is accelerated, and when it is lower, the spindle motor 4 is decelerated. Further, the larger the absolute value of the rotation command signal from the reference voltage 1.65 V is, the larger the current value passed through the spindle motor is, and a larger torque is generated in the spindle motor 4.
Normally, the maximum rotation command signal is output when the disc is changed from the stop state to the reproduction state and when the disc is changed from the reproduction state to the stop state.

Here, the acceleration voltage V1 of the rotation command signal 1 is 3.3V, and the deceleration voltage V′1 is 0V. That is, when rotating the spindle motor 4 with the rotation command signal 1, the spindle motor 4 is accelerated with the acceleration voltage V1 = 3.3V and decelerated with the deceleration voltage V′1 = 0V. Similarly, the acceleration voltage V1 of the rotation command signal 2 is set to 2.5V, and the deceleration voltage V′1 is set to 0.8V.
When the spindle motor 4 is accelerated by the acceleration voltage and the rotation speed reaches a certain value (for example, 2500 rpm), the voltage is maintained around 1.65 V which is the reference voltage. And it decelerates with a deceleration voltage and stops rotation.

The control unit 8 includes, for example, a CPU (Central Processing Unit), a RAM (Random Access Memory), a ROM (Read Only Memory), and the like, and controls each unit of the optical disc apparatus 100.
The CPU controls the entire optical disc apparatus 100 by reading a processing program stored in the ROM, developing it in the RAM, and executing it. The RAM expands a processing program executed by the CPU in a program storage area in the RAM, and stores input data and a processing result generated when the processing program is executed in the data storage area. The ROM is composed of, for example, a semiconductor memory, and stores a processing program, data, and the like in advance.

The control unit 8 also has a function as a control unit that controls the rotation speed of the spindle motor 4 based on the humidity detected by the humidity detection sensor 10.
Hereinafter, the control operation of the spindle motor 4 in the optical disc apparatus 100 will be described with reference to FIGS.

(First embodiment)
FIG. 4 is a flowchart showing an example of an optical disc rotation control process (optical disc rotation control process 1) performed in the optical disc apparatus 100 according to the present embodiment. This optical disk rotation control process is realized by the CPU executing an optical disk rotation control program stored in the ROM.

As shown in FIG. 4, in step S11, it is determined whether or not the insertion of the disk D is detected. Detection of the insertion of the disk D is performed by the sensor 3. When the insertion of the disk D is detected, the process proceeds to the next step S12. When the insertion of the disk D is not detected, the process of the step S11 is repeated.
In step S12, it is determined whether the humidity is equal to or higher than a predetermined value. Here, as shown in FIG. 5, the predetermined value is 30% as an example, but this numerical value can be arbitrarily set. If the humidity is equal to or higher than the predetermined value (30%), the process proceeds to the next step S13, and if the humidity is less than the predetermined value (30%), the process proceeds to step S14.

In step S <b> 13, a rotation command signal based on a voltage (= V1, V′1: first voltage) corresponding to a humidity equal to or higher than a predetermined value is supplied to the motor driver 9.
In step S <b> 14, a rotation command signal based on a voltage (= V2, V′2: second voltage) corresponding to humidity less than a predetermined value is supplied to the motor driver 9.
Steps S12 to S14 are summarized as shown in the table of FIG. That is, when the humidity is 30% or more, the rotation command signal by the first voltage is supplied to the motor driver 9 when the humidity is less than 30%. The flowing current is controlled. Thus, when the humidity is low, the torque value of the spindle motor 4 is reduced by lowering the voltage value of the rotation command signal than usual to reduce the current flowing through the spindle motor 4 until the target rotational speed is reached. Control to increase the time required for.

  In step S15, it is determined whether or not the spindle motor 4 has reached a predetermined rotational speed. When the spindle motor 4 reaches a predetermined rotational speed, the disk D is reproduced, and when the spindle motor 4 does not reach the predetermined rotational speed, the rotation corresponding to the humidity determined in step S12 is performed. The process of step S13 or S14 is continued according to the voltage value of the command signal.

  As described above, the control unit 8 of the optical disc apparatus 100 according to the first embodiment sends the rotation command signal based on the first voltage value to the motor driver when the humidity detected by the humidity detection sensor 10 is equal to or higher than the predetermined value. 9, and if it is less than the predetermined value, the rotation command signal based on the second voltage value lower than the first voltage value is supplied to the motor driver 9 to control the time required for acceleration / deceleration of the spindle motor. To do.

As a result, in a low humidity environment, acceleration and deceleration in the rotation of the spindle motor 4 can be made slower than normal, so that it is possible to prevent disk slip due to sudden torque fluctuation during acceleration / deceleration. .
In addition, even if a disc slip occurs, the frequency of static electricity generation can be suppressed, making it difficult to collect polycarbonate powder. Further, since the rotational speed is reduced, the generation of polycarbonate powder can be suppressed even when a disc with burrs or the like is reproduced.

(Second Embodiment)
FIG. 6 is a flowchart showing an example of an optical disc rotation control process (optical disc rotation control process 2) performed in the optical disc apparatus 100 according to the present embodiment.

As shown in FIG. 6, in step S21, it is determined whether or not the insertion of the disk D is detected. When the insertion of the disk D is detected, the process proceeds to the next step S22. When the insertion of the disk D is not detected, the process of step S21 is repeated.
In step S22, it is determined whether the humidity is equal to or higher than a first predetermined value. Here, the first predetermined value is 30% as an example, but this numerical value can be arbitrarily set. If the humidity is equal to or higher than the first predetermined value (30%), the process proceeds to the next step S23, and if the humidity is less than the first predetermined value (30%), the process proceeds to step S24. To do.
In step S <b> 23, a rotation command signal based on a voltage (= V1, V′1: first voltage) corresponding to the humidity equal to or higher than the first predetermined value is supplied to the motor driver 9.

In step S24, it is determined whether the humidity is equal to or higher than a second predetermined value. Here, the second predetermined value is 15% as an example, but this numerical value can be arbitrarily set. If the humidity is greater than or equal to the second predetermined value (15%), the process proceeds to the next step S25, and if the humidity is less than the second predetermined value (15%), the process proceeds to step S26. To do.
In step S25, a rotation command signal based on a voltage (= V2, V′2: second voltage) corresponding to the humidity not less than the first predetermined value and less than the second predetermined value is supplied to the motor driver 9.
In step S26, a rotation command signal based on a voltage (= V3, V′3: third voltage) corresponding to the humidity equal to or higher than the second predetermined value is supplied to the motor driver 9.

  FIG. 7 shows the relationship between the rotation command signal and the rotation speed of the motor when controlling the rotation of the spindle motor 4 performed in steps S23, S25, and S26. FIG. 7A shows the output transition of the rotation command signal, and FIG. 7B shows the transition of the rotation speed of the spindle motor.

  Steps S22 to S26 are summarized as shown in the table of FIG. That is, when the humidity is 30% or more, the rotation command signal by the first voltage, when the humidity is 15% or more and less than 40%, the rotation command signal by the second voltage, and when the humidity is less than 15%, the third command When a rotation command signal based on voltage is supplied to the motor driver 9, the current flowing through the spindle motor 4 is controlled.

  In step S27, it is determined whether or not the spindle motor 4 has reached a predetermined rotational speed. When the spindle motor 4 reaches a predetermined rotational speed, the disk D is reproduced, and when the spindle motor 4 does not reach the predetermined rotational speed, it corresponds to the humidity determined in steps S22 and S24. The process of step S23, S25 or S26 is continued according to the voltage value of the rotation command signal.

  As described above, the control unit 8 of the optical disc apparatus 100 according to the second embodiment allows the rotation command signal based on the first voltage value when the humidity detected by the humidity detection sensor 10 is equal to or higher than the first predetermined value. Is supplied to the motor driver 9, and when the second predetermined value is smaller than the first predetermined value and less than the first predetermined value, the rotation command signal is generated by the second voltage value lower than the first voltage value. Is supplied to the motor driver 9, and if it is less than the second predetermined value, a rotation command signal having a third voltage value lower than the second voltage value is supplied to the motor driver 9. Controls the time required for deceleration.

  As a result, the acceleration and deceleration in the rotation of the spindle motor 4 can be made more finely in a low humidity environment, so that the disk slip can be prevented more effectively.

(Third embodiment)
FIG. 9 is a flowchart showing an example of an optical disc rotation control process (optical disc rotation control process 3) performed in the optical disc apparatus 100 according to the present embodiment.

As shown in FIG. 9, in step S31, it is determined whether or not the insertion of the disk D is detected. If the insertion of the disk D is detected, the process proceeds to the next step S32. If the insertion of the disk D is not detected, the process of step S31 is repeated.
In step S32, it is determined whether or not the humidity is equal to or higher than a second predetermined value. Here, the second predetermined value is 80% as an example, but this numerical value can be set arbitrarily. If the humidity is greater than or equal to the second predetermined value (80%), the process proceeds to the next step S33, and if the humidity is less than the second predetermined value (80%), the process proceeds to step S34. To do.
In step S33, a rotation command signal based on a voltage (= V3, V′3: third voltage) corresponding to the humidity equal to or higher than the second predetermined value is supplied to the motor driver 9. As shown in FIG. 10, V3 has a high absolute value from the reference voltage as compared with the normal supply voltage V1, and here, in order to avoid that the deceleration voltage becomes a negative value, the deceleration voltage is used here. V′1 is used as

In step S34, it is determined whether the humidity is equal to or higher than a first predetermined value. Here, the first predetermined value is 30% as an example, but this numerical value can be arbitrarily set. If the humidity is equal to or higher than the second predetermined value (30%), the process proceeds to the next step S35, and if the humidity is less than the second predetermined value (30%), the process proceeds to step S36. To do.
In step S <b> 35, a rotation command signal based on a voltage (= V1, V′1: first voltage) corresponding to the humidity not less than the first predetermined value and less than the second predetermined value is supplied to the motor driver 9.
In step S <b> 36, a rotation command signal with a voltage (= V2, V′2: second voltage) corresponding to the humidity less than the first predetermined value is supplied to the motor driver 9.

  FIG. 10 shows the relationship between the rotation command signal and the rotation speed of the motor when controlling the rotation of the spindle motor 4 performed in step S33, step S35, and step S36. FIG. 10A shows the output transition of the rotation command signal, and FIG. 10B shows the transition of the rotation speed of the spindle motor.

  Steps S32 to S36 are summarized as shown in the table of FIG. That is, when the humidity is 80% or more, the rotation command signal by the third voltage, when the humidity is 30% or more and less than 80%, the rotation command signal by the first voltage, and when the humidity is less than 30%, the second command When a rotation command signal based on voltage is supplied to the motor driver 9, the current flowing through the spindle motor 4 is controlled.

  In step S37, it is determined whether or not the spindle motor 4 has reached a predetermined rotational speed. When the spindle motor 4 reaches a predetermined rotational speed, the disk D is reproduced, and when the spindle motor 4 does not reach the predetermined rotational speed, it corresponds to the humidity determined in steps S32 and S34. The process of step S33, S35 or S36 is continued according to the voltage value of the rotation command signal.

  As described above, the control unit 8 of the optical disc apparatus 100 according to the third embodiment determines that the humidity detected by the humidity detection sensor 10 is greater than or equal to the second predetermined value that is greater than the first predetermined value. A rotation command signal with a third voltage value higher than the voltage value of 1 is supplied to the motor driver 9, and if it is greater than or equal to the first predetermined value and less than the second predetermined value, the rotation command signal with the first voltage value Is supplied to the motor driver 9, and if it is less than the first predetermined value, a rotation command signal having a second voltage value lower than the first voltage value is supplied to the motor driver 9. Controls the time required for deceleration.

  As a result, the rotational speed of the spindle motor 4 can be accelerated as compared with the normal time in a high humidity environment where there is little possibility of disc slip, so the time required to reach the target rotational speed can be shortened. Convenient for the user.

  As mentioned above, although concretely demonstrated based on embodiment which concerns on this invention, this invention is not limited to the said embodiment, It can change in the range which does not deviate from the summary.

  For example, in the above embodiment, the power supply voltage to be supplied is set to 3.3 V and the reference voltage of the rotation command signal is set to 1.65 V. However, this numerical value is not particularly limited and can be arbitrarily changed.

  It is also possible to combine the first embodiment and the third embodiment or the second embodiment and the third embodiment.

  In addition, the detailed configuration and detailed operation of each apparatus constituting the optical disc apparatus 100 can be changed as appropriate without departing from the spirit of the present invention.

DESCRIPTION OF SYMBOLS 100 Optical disk apparatus 1 Case 2 Insert port 3 Sensor 4 Spindle motor 5 Turntable 6a Carrying roller 6b Disk guide 7 Loading motor 8 Control part 9 Motor driver 10 Humidity detection sensor

Claims (6)

In an optical disc apparatus provided with a spindle motor that rotates a turntable for placing an optical disc,
Humidity detecting means for detecting the humidity in the device;
Control means for controlling the time required for acceleration / deceleration of the spindle motor based on the humidity detected by the humidity detection means;
An optical disc apparatus comprising: A motor driver for controlling the spindle motor;
The control means includes
When the humidity detected by the humidity detection means is equal to or higher than a predetermined value, a rotation command signal based on a first voltage value is supplied to the motor driver, and when the humidity is lower than a predetermined value, the first voltage value 2. The optical disc apparatus according to claim 1, wherein a time required for acceleration / deceleration of the spindle motor is controlled by supplying a rotation command signal having a lower second voltage value to the motor driver. A motor driver for controlling the spindle motor;
The control means includes
When the humidity detected by the humidity detecting means is equal to or higher than a first predetermined value, a rotation command signal based on a first voltage value is supplied to the motor driver, and the second is smaller than the first predetermined value. A rotation command signal based on a second voltage value lower than the first voltage value is supplied to the motor driver when the value is less than the first predetermined value and less than the second predetermined value. If there is, a time required for acceleration / deceleration of the spindle motor is controlled by supplying a rotation command signal having a third voltage value lower than the second voltage value to the motor driver. Item 4. The optical disk device according to Item 1. A motor driver for controlling the spindle motor;
The control means includes
When the humidity detected by the humidity detection means is equal to or greater than a second predetermined value that is greater than a first predetermined value, a rotation command signal with a third voltage value that is higher than the first voltage value is provided to the motor. A rotation command signal based on the first voltage value is supplied to the motor driver when the first predetermined value is greater than or equal to the second predetermined value and less than the first predetermined value. If there is, a time required for acceleration / deceleration of the spindle motor is controlled by supplying a rotation command signal having a second voltage value lower than the first voltage value to the motor driver. Item 4. The optical disk device according to Item 1. A motor control method in an optical disc apparatus provided with a spindle motor for rotating a turntable for placing an optical disc,
A step of detecting humidity in the apparatus by means of humidity detection;
A step of controlling a time required for acceleration / deceleration of the spindle motor based on the detected humidity by a control means;
A motor control method including: A computer of an optical disk apparatus provided with a spindle motor for rotating a turntable for mounting an optical disk,
Control means for controlling the time required for acceleration / deceleration of the spindle motor based on the humidity detected by the humidity detection means for detecting the humidity in the apparatus;
Program to function as.

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