JP2010205371A - Disc reproduction apparatus, disc reproduction method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reliably operate and further reduce loss in electric power, thereby reducing heating further. <P>SOLUTION: A power source 33 supplies 6-volt electric power. A power source 31 supplies 8-volt electric power higher than 6-volts. A microcomputer 35 determines whether a disc driving mode is a reproduction mode or not. If the mode is determined to be the reproduction mode, 6-volt electric power is selected for electric power to be supplied to a driver IC 12. If the mode is determined not to be the reproduction mode, 8-volts higher than 6 volts is selected. This can be applied to an optical disc drive. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a disk playback device, a disk playback method, and a program.

  2. Description of the Related Art Optical disc drives that play various optical discs such as CD (compact disc) and DVD (digital versatile disc) are widely used. In optical disk drives that use brushed motors for focus pickup coils and tracking actuator coils, as well as thread motors, spindle motors, and disk transport motors, BTL is an operational amplifier type as means for driving these coils and motors. Generally, a (bridged transless) type driver IC (integrated circuit) is employed.

  FIG. 9 is a diagram illustrating the configuration of the driver IC. The driver IC 101 drives the focus coil 102, the tracking coil 103, the spindle motor 104, the sled motor 105, and the disk transport motor 106. The focus coil 102 and the tracking coil 103 are provided in the optical pickup unit.

  The driver IC 101 is provided with buffers 121-1 to 121-5 and BTL output units 122-1 to BTL output unit 122-5. Each of the buffers 121-1 to 121-5 acquires the supplied control signal and supplies a signal corresponding to the control signal to each of the BTL output unit 122-1 to BTL output unit 122-5. The BTL output unit 122-1 drives the focus coil 102 in accordance with the signal from the buffer 121-1. The BTL output unit 122-2 drives the tracking coil 103 in accordance with the signal from the buffer 121-2. The BTL output unit 122-3 drives the spindle motor 104 according to the signal from the buffer 121-3. The BTL output unit 122-4 drives the sled motor 105 according to the signal from the buffer 121-4. The BTL output unit 122-5 drives the disk transport motor 106 in accordance with the signal from the buffer 121-5.

  A conventional disk reproducing apparatus includes spindle motor means, motor driving means, pickup means for detecting information recorded on the disk, and rotation information detection means for detecting rotation speed information included in a detection signal of the pickup means. A speed control means for controlling the rotation speed of the motor means based on the speed information detected by the rotation information detection means, a traverse means for positioning the pickup means at an arbitrary position in the radial direction on the disk, and a motor drive means. Some employ a plurality of power supply means for supplying power, a means for detecting a saturation voltage of a driving transistor of the motor drive means, and a power selection means for switching between the plurality of power supply means (for example, Patent Documents) 1).

JP-A-8-273291

  However, when using a BTL driver IC, a design that takes into account the heat generated by the power loss of the output stage transistor is important. In particular, in the case of in-vehicle applications, since the frequency of use in a high-temperature environment is high, there is a concern that the margin for the driver IC's own rating is reduced due to heat generation, and that the peripheral components are adversely affected by heat. Therefore, it is considered effective to lower the power supply voltage as one means for reducing heat generation.

  However, for example, when a disk is transported and a high voltage output is required, the power supply voltage of the driver IC is determined by the power supply voltage necessary for transporting the disk in any operating state. For example, it has been difficult to reduce the heat generated when a disc is reproduced.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above problems, that is, to provide a disc reproducing apparatus, a disc reproducing method, and a program that can be reliably operated, reduce power loss, and further reduce heat generation. To do.

  In order to solve the above problems, one aspect of a disk reproducing apparatus according to the present invention is a disk reproducing apparatus that reproduces data recorded on a disk, and includes a first power source that supplies a first voltage, A second power supply for supplying a second voltage higher than the voltage of 1, a determination means for determining whether or not a mode for driving the disc is a reproduction mode, and a voltage supplied to a drive unit for driving the disc And a selection means for selecting the first voltage when it is determined that the mode is the reproduction mode and selecting the second voltage when it is determined that the mode is not the reproduction mode.

  Further, according to one aspect of the disk reproducing apparatus of the present invention, in addition to the above-described configuration, the determination unit may start the disk reproducing apparatus, load the disk, search, or eject the disk. It is determined that the playback mode is not set.

  Further, according to one aspect of the disk reproducing apparatus of the present invention, in addition to the above-described configuration, a third power supply for supplying a third voltage lower than the first voltage is further provided, and the determination unit is in a reproduction mode. If it is determined that the normal reproduction mode, the selection unit determines that it is in the reproduction mode as a voltage supplied to the drive unit, and is not in the normal reproduction mode. When it is determined that the first voltage is selected and it is determined that the current mode is the playback mode, the third voltage is selected when it is determined that the current mode is the normal playback mode.

  Furthermore, in one aspect of the disk reproducing device of the present invention, in addition to the above-described configuration, when the determination unit generates vibration, the disk has scratches, or the disk has runout or eccentricity, It is determined that the mode is not the normal playback mode.

  In addition, according to one aspect of the disk reproducing method of the present invention, a first power source for supplying a first voltage, a second power source for supplying a second voltage higher than the first voltage, and a drive for driving the disk. A disc playback method of a disc playback apparatus for playing back data recorded on a disc, wherein the mode for driving the disc by the determination means is a playback mode. A determination step for determining whether or not the reproduction mode is selected as the voltage supplied to the drive unit by the selection unit, and the first voltage is selected and it is determined that the reproduction mode is not the reproduction mode. And a selection step of selecting the second voltage.

  Further, according to one aspect of the program of the present invention, a first power source that supplies a first voltage, a second power source that supplies a second voltage higher than the first voltage, and a drive unit that drives a disk A disc playback device comprising: a computer for controlling the disc playback device that plays back data recorded on the disc, and determining whether or not the mode for driving the disc is a playback mode And a selection step of selecting a first voltage as a voltage supplied to the drive unit when it is determined that the mode is the reproduction mode, and selecting a second voltage when it is determined that the mode is not the reproduction mode. It is supposed to perform processing including.

  According to one aspect of the present invention, it is possible to provide a disk reproducing device, a disk reproducing method, and a program that can be reliably operated, further reduce power loss, and further reduce heat generation.

It is a block diagram which shows the example of a structure of a disc reproducing | regenerating apparatus. It is a block diagram which shows the example of a structure of the function implement | achieved by the microcomputer 35 which executes a program. 5 is a diagram for explaining an example of details of control of power to a driver IC 12 by a power switching unit 11. FIG. It is a flowchart explaining the process of power supply control. It is a block diagram which shows the other example of a structure of a disc reproducing | regenerating apparatus. It is a block diagram which shows the example of a structure of the function implement | achieved by the microcomputer 77 which executes a program. 6 is a diagram for explaining details of control of power to a driver IC 12 by a power switching unit 61. FIG. It is a flowchart explaining the process of power supply control. It is a figure which shows the structure of driver IC.

  Hereinafter, a disk reproducing apparatus according to an embodiment of the present invention will be described with reference to FIGS.

  FIG. 1 is a block diagram showing an example of the configuration of a disc playback apparatus. The disk playback device plays back data recorded on a disk such as a magnetic disk such as a flexible disk or a hard disk, an optical disk such as a CD or a DVD, or a magneto-optical disk. In the following description, it is assumed that the disk playback device plays back data recorded on a disk that is an optical disk.

  The disk reproducing apparatus includes a power supply switching unit 11, a driver IC 12, a focus coil 13, a tracking coil 14, a spindle motor 15, a thread motor 16, and a disk transport motor 17.

  The power supply switching unit 11 switches the voltage of the power supplied to the driver IC 12 according to the operation mode of the disk playback device. Here, the operation mode is the activation of the disc playback device, the loading of the disc loaded into the disc playback device, the playback of the data recorded on the disc, the search of the data recorded on the disc, the ejection of the disc (ejection) ) Mode. The driver IC 12 supplies voltage and current to each of the focus coil 13, the tracking coil 14, the spindle motor 15, the sled motor 16, and the disk transport motor 17 in accordance with a control signal supplied from the outside. 13 and the tracking coil 14 are excited to drive a pickup for reading data recorded on the disk, and to drive the spindle motor 15, the thread motor 16, and the disk transport motor 17.

  The focus coil 13 focuses the beam of light emitted from the pickup onto the recording layer of the disc by changing the position of the focus lens of the pickup. The tracking coil 14 causes the light beam emitted from the pickup to follow a track formed of a pit or the like formed in the recording layer of the disk and arranged in one row. The spindle motor 15 rotates the disk. The sled motor 16 moves the pickup in a direction transverse to the track. The disk transport motor 17 drives a mechanism for loading the disk or ejecting the disk.

  The driver IC 12, the focus coil 13, the tracking coil 14, the spindle motor 15, the thread motor 16, and the disk transport motor 17 are an example of a drive unit that drives the disk.

  The power supply switching unit 11 includes a power supply unit 31, a relay 32, a power supply unit 33, a relay 34, and a microcomputer 35. The power supply unit 31 converts the voltage of the power supplied from the outside into a voltage of 8V and supplies the voltage of 8V to the relay 32. The relay 32 closes the contact or opens the contact according to the control of the microcomputer 35. That is, when the relay 32 closes the contact, 8V voltage supplied from the power supply unit 31 is supplied to the driver IC 12, and when the relay 32 opens the contact, 8V voltage supplied from the power supply unit 31 is supplied to the driver IC12. Not supplied.

  The power supply unit 33 converts the voltage of the power supply supplied from the outside into a voltage of 6V and supplies the voltage of 6V to the relay 34. The relay 34 closes the contact or opens the contact according to the control of the microcomputer 35. That is, when the relay 34 closes the contact, the 6V voltage supplied from the power supply unit 33 is supplied to the driver IC 12, and when the relay 34 opens the contact, the 6V voltage supplied from the power supply unit 33 is supplied to the driver IC12. Not supplied.

  Hereinafter, when the respective contacts of the relay 32 or the relay 34 are closed, the relay 32 or the relay 34 is referred to as being turned on, and when the respective contacts of the relay 32 or the relay 34 are opened, when the relay 32 or the relay 34 is turned off. Called. Further, hereinafter, when the relay 32 is turned on and the 8V voltage from the power supply unit 31 is supplied to the driver IC 12 is referred to as turning on the 8V power supply, and the relay 32 is turned off and the driver IC 12 is supplied with the power supply unit. The fact that the 8V voltage from 31 is not supplied is referred to as turning off the 8V power supply. Similarly, hereinafter, when the relay 34 is turned on and the 6V voltage from the power supply unit 33 is supplied to the driver IC 12 is referred to as turning on the 6V power, and the relay 34 is turned off and the driver IC 12 is powered. That the 6V voltage from the unit 33 is not supplied is referred to as turning off the 6V power supply.

  The microcomputer 35 is a so-called built-in microcomputer, and is supplied from a control unit (not shown) that executes a program stored in a built-in ROM or RAM and controls the entire disk reproducing apparatus. The power supply switching unit 11 is controlled according to an operation mode signal indicating an operation mode. The operation mode signal may be supplied from the driver IC 12.

  The power supply switching unit 11 may be configured as one component or IC.

  FIG. 2 is a block diagram showing an example of a functional configuration realized by the microcomputer 35 that executes the program. When the microcomputer 35 executes the program, the determination unit 51 and the power control unit 52 are realized.

  The determination unit 51 determines whether or not the mode for driving the disc is a reproduction mode. The power supply control unit 52 controls the relay 32 or the relay 34, and when it is determined that the reproduction mode is selected as the voltage supplied to the driver IC 12, the 6V voltage supplied from the power supply unit 33 is selected and If it is determined that the mode is not selected, the voltage of 8 V supplied from the power supply unit 31 is selected.

  FIG. 3 is a diagram for explaining an example of details of control of the power supply to the driver IC 12 by the power supply switching unit 11. In FIG. 3, the top row indicates the operation mode, the second row from the top indicates whether or not there is a need to expand the dynamic range of the output stage of the driver IC 12, and the third row from the top. The row indicates the voltage supplied to the driver IC 12. In FIG. 3, the fourth row from the top with the number 1 indicates whether or not the focus drive control is performed, and the fifth row from the top with the number 2. Indicates whether or not tracking drive control is performed, and is numbered 3; the sixth line from the top indicates whether or not thread drive control is performed; and is numbered 4 The seventh row from the top indicates whether or not the spindle drive control is performed, and is numbered 5, and the eighth row from the top indicates whether or not the disk transport control is performed. . The spindle drive control is targeted for the case where CLV (constant linear velocity) control is performed.

  In other words, when the operation mode is a disk load (hereinafter referred to as a disk load) in which a disk is mounted on a disk playback device, focus drive control, tracking drive control, sled drive control, and spindle drive control are not performed. Since the conveyance control is performed, the disk conveyance control is performed, so that there is a need to expand the dynamic range of the output stage of the driver IC 12, and a voltage of 8V is supplied to the driver IC 12 and a voltage of 6V is not supplied.

  Further, when the operation mode is activation of the disk playback device (hereinafter simply referred to as activation), focus drive control that is focus search, tracking drive control, sled drive control, and spindle drive control that is motor acceleration are performed. Since the disc transport control is not performed, the focus search is performed in the focus drive control, and the motor acceleration is controlled in the spindle drive control, the dynamic range of the output stage of the driver IC 12 needs to be expanded. Is supplied with a voltage of 8V and is not supplied with a voltage of 6V.

  Further, when the operation mode is reproduction of data recorded on the disc (hereinafter referred to as disc reproduction), focus drive control, tracking drive control, sled drive control, and spindle drive control are performed, and the disc transport control is performed. Since this is not done, there is no need to expand the dynamic range of the output stage of the driver IC 12, and a voltage of 6V is supplied to the driver IC 12, and a voltage of 8V is not supplied.

  Furthermore, when the operation mode is a search of data recorded on the disc (hereinafter simply referred to as a search), focus drive control, tracking drive control that is lens kick, sled drive control that is forced feed, and Spindle drive control that is acceleration / deceleration is performed, disk conveyance control is not performed, lens kick is performed in tracking drive control, forced feed is performed in sled drive control, and acceleration / deceleration is controlled in spindle drive control. Therefore, the driver IC 12 is supplied with a voltage of 8V and not supplied with a voltage of 6V.

  When the operation mode is disk ejection (hereinafter referred to as disk ejection), focus drive control, tracking drive control, sled drive control, and spindle drive control are not performed, and disk transport control is performed. Since the conveyance control is performed, there is a need to expand the dynamic range of the output stage of the driver IC 12, and a voltage of 8V is supplied to the driver IC 12, and a voltage of 6V is not supplied.

  Next, power control processing will be described with reference to the flowchart of FIG. In step S11, the determination unit 51 refers to the operation mode signal to determine whether or not the operation mode is a disk loading operation mode. If it is determined in step S11 that the operation mode is the disk load, the disk load requires a larger output in the drive unit. Therefore, the procedure proceeds to step S12 to supply a higher voltage to the drive unit, and the power supply The controller 52 turns on the 8V power supply and turns off the 6V power supply, and the procedure returns to step S11.

  That is, in step S12, the power supply control unit 52 turns on the relay 32, causes the driver IC 12 to supply the 8V voltage from the power supply unit 31, turns off the relay 34, and turns off the 6V voltage from the power supply unit 33. Shut off the supply to the driver IC12.

  If it is determined in step S11 that the operation mode is not the disk loading operation mode, the procedure proceeds to step S13, and the determination unit 51 refers to the operation mode signal to determine whether the operation mode is the activation operation mode. If it is determined in step S13 that the operation mode is the start-up operation mode, the start-up requires a larger output in the drive unit. Therefore, the procedure proceeds to step S12 to supply a higher voltage to the drive unit, and the power-supply control unit In 52, the power supply of 8V is turned on, the power supply of 6V is turned off, and the procedure returns to step S11.

  If it is determined in step S13 that the operation mode is not the start-up operation mode, the procedure proceeds to step S14, and the determination unit 51 refers to the operation mode signal to determine whether or not the operation mode is a disc playback operation mode. If it is determined in step S14 that the operation mode is a disc playback operation mode, in the disc playback operation mode, the drive unit can secure an output necessary for control even at a lower voltage. The unit 52 turns on the 6V power supply and turns off the 8V power supply, and the procedure returns to step S11.

  That is, in step S15, the power supply control unit 52 turns on the relay 34, causes the driver IC 12 to supply 6V voltage from the power supply unit 33, turns off the relay 32, and turns on the 8V voltage from the power supply unit 31. Shut off the supply to the driver IC12.

  If it is determined in step S14 that the operation mode is not the disc playback operation mode, the procedure proceeds to step S16, and the determination unit 51 refers to the operation mode signal to determine whether the operation mode is the search operation mode. If it is determined in step S16 that the search operation mode is selected, since the search requires a larger output in the drive unit, the procedure proceeds to step S12 in order to supply a higher voltage to the drive unit. In 52, the power supply of 8V is turned on, the power supply of 6V is turned off, and the procedure returns to step S11.

  If it is determined in step S16 that the operation mode is not the search operation mode, the procedure proceeds to step S17, and the determination unit 51 refers to the operation mode signal to determine whether the operation mode is the disc eject operation mode. If it is determined in step S17 that the operation mode is the disc eject mode, the disc eject requires a larger output in the drive unit. Therefore, in order to supply a higher voltage to the drive unit, the procedure proceeds to step S12. The controller 52 turns on the 8V power supply and turns off the 6V power supply, and the procedure returns to step S11.

  If it is determined in step S17 that the operation mode is not the disk ejection operation mode, the operation mode cannot be determined, and the procedure returns to step S11 without changing the voltage supplied to the driver IC 12.

  In this way, it is determined whether or not the mode for driving the disc is the playback mode, and when it is determined that the mode is the playback mode as the voltage supplied to the drive unit for driving the disc, a voltage of 6 V is obtained. If it is selected and it is determined that the playback mode is not selected, a voltage of 8V higher than 6V is selected.

  Further, switching of the power supply voltage can be further subdivided. In this case, a predetermined number of different voltages can be used. Hereinafter, an example in which vibrations, scratches, and disk fluctuations are detected and three different voltages are used will be described.

  FIG. 5 is a block diagram showing another example of the configuration of the disc playback apparatus.

  5 includes a power supply switching unit 61, a driver IC 12, a focus coil 13, a tracking coil 14, a spindle motor 15, a thread motor 16, and a disk transport motor 17. The same parts as those of the disk reproducing apparatus shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

  The power supply switching unit 61 switches the voltage of the power supplied to the driver IC 12 according to the operation mode of the disk playback device.

  The power supply switching unit 61 includes a power supply unit 71, a relay 72, a power supply unit 73, a relay 74, a power supply unit 75, a relay 76, and a microcomputer 77. The power supply unit 71 converts the voltage of the power supplied from the outside into a voltage of 8V and supplies the voltage of 8V to the relay 72. The relay 72 closes or opens the contact according to the control of the microcomputer 77. That is, when the relay 72 closes the contact, the 8V voltage supplied from the power supply unit 71 is supplied to the driver IC 12, and when the relay 72 opens the contact, the 8V voltage supplied from the power supply unit 71 is supplied to the driver IC12. Not supplied.

  The power supply unit 73 converts the voltage of the power supplied from the outside into a voltage of 6V and supplies the voltage of 6V to the relay 74. The relay 74 closes the contact or opens the contact according to the control of the microcomputer 77. That is, when the relay 74 closes the contact, the 6V voltage supplied from the power supply unit 73 is supplied to the driver IC 12, and when the relay 74 opens the contact, the 6V voltage supplied from the power supply unit 73 is supplied to the driver IC 12. Not supplied.

  The power supply unit 75 converts the voltage of the power supply supplied from the outside into a voltage of 5V and supplies the voltage of 5V to the relay 76. The relay 76 closes the contact or opens the contact according to the control of the microcomputer 77. That is, when the relay 76 closes the contact, the voltage of 5V supplied from the power supply unit 75 is supplied to the driver IC 12, and when the relay 76 opens the contact, the voltage of 5V supplied from the power supply unit 75 is supplied to the driver IC 12. Not supplied.

  Hereinafter, the contact of the relay 72, the relay 74, or the relay 76 is referred to as the relay 72, the relay 74, or the relay 76 being turned on, and the contact of the relay 72, the relay 74, or the relay 76 is opened. It is said that the relay 72, the relay 74, or the relay 76 is turned off.

  Further, in the following, when the relay 72 is turned on and the 8V voltage from the power supply unit 71 is supplied to the driver IC 12 is referred to as turning on the 8V power, and the relay 72 is turned off and the driver IC 12 is powered. That the 8V voltage from the unit 71 is not supplied is referred to as turning off the 8V power supply. Similarly, hereinafter, when the relay 74 is turned on and the 6V voltage from the power supply unit 73 is supplied to the driver IC 12 is referred to as turning on the 6V power, and the relay 74 is turned off and the driver IC 12 is turned on. The fact that the 6V voltage from the power supply unit 73 is not supplied is referred to as turning off the 6V power supply. Further, hereinafter, when the relay 76 is turned on and the voltage of 5V from the power supply unit 75 is supplied to the driver IC 12 is referred to as turning on the 5V power supply, and the relay 76 is turned off and the driver IC 12 is supplied with the power supply unit. That the 5V voltage from 75 is not supplied is referred to as turning off the 5V power supply.

  The microcomputer 77 is a so-called built-in microcomputer, and is supplied from a control unit (not shown) that executes a program stored in a built-in ROM or RAM and controls the entire disk reproducing apparatus. The power supply switching unit 61 is controlled in accordance with the operation mode signal, vibration detection signal, flaw detection signal, and disk fluctuation signal. The vibration detection signal indicates a result of detection of vibration of the disk reproducing device or vibration of the disk by an acceleration sensor or the like. The flaw detection signal is generated in response to the occurrence of a burst error in decoding the read signal output from the pickup, and indicates the result of detection of a flaw on the disc. The disk fluctuation signal indicates the fluctuation of the disk, such as the fluctuation of the surface of the disk or the eccentricity, detected by extracting the fluctuation of the read signal output from the pickup.

  The power supply switching unit 61 may be configured as one component or IC.

  FIG. 6 is a block diagram illustrating an example of a functional configuration realized by the microcomputer 77 that executes a program. When the microcomputer 77 executes the program, the determination unit 91, the power supply control unit 92, and the detection unit 93 are realized.

  The determination unit 91 determines whether or not the mode for driving the disc is a reproduction mode. Further, when the determination unit 91 determines that the reproduction mode is selected, the determination unit 91 determines whether or not the normal reproduction mode is selected.

  The power supply control unit 92 controls the relay 72, the relay 74, and the relay 76, and selects the voltage of 8V supplied from the power supply unit 71 when it is determined that the mode is not the reproduction mode as the voltage supplied to the driver IC 12. When it is determined that the mode is the playback mode, when it is determined that the mode is not the normal playback mode, the voltage of 6V supplied from the power supply unit 73 is selected, and when it is determined that the mode is the playback mode, When it is determined that the reproduction mode is selected, the 5 V voltage supplied from the power supply unit 75 is selected.

  The detection unit 93 acquires an operation mode signal, a vibration detection signal, a flaw detection signal, and a disk fluctuation signal, and detects the occurrence of vibration, a disk flaw, or a disk fluctuation.

  FIG. 7 is a diagram for explaining the details of the control of the power supply to the driver IC 12 by the power supply switching unit 61. In addition to the same control as the power supply control to the driver IC 12 shown in FIG. 3, the power supply switching unit 61 controls the power supply to the driver IC 12 shown in FIG. Hereinafter, description of the same control as the control of the power to the driver IC 12 described with reference to FIG.

  In FIG. 7, the top row indicates the operation mode, the second row from the top indicates whether or not there is a need to expand the dynamic range of the output stage of the driver IC 12, and the third row from the top. The row indicates the voltage supplied to the driver IC 12. In FIG. 7, the fourth row from the top with the number 1 indicates whether or not the focus drive control is performed, and the fifth row from the top with the number 2. Indicates whether or not tracking drive control is performed, and is numbered 3; the sixth line from the top indicates whether or not thread drive control is performed; and is numbered 4 The seventh row from the top indicates whether or not the spindle drive control is performed, and is numbered 5, and the eighth row from the top indicates whether or not the disk transport control is performed. .

  That is, when the operation mode is reproduction of data recorded on the disk and normal reproduction, focus drive control, tracking drive control, sled drive control, and spindle drive control are performed, and disk conveyance control is not performed. Therefore, there is no need to expand the dynamic range of the output stage of the driver IC 12, and a voltage of 5V is supplied to the driver IC 12, and a voltage of 6V or 8V is not supplied.

  In addition, when the operation mode is reproduction of data recorded on the disk and vibration occurs, focus drive control, tracking drive control, sled drive control, and spindle drive control are performed, and the disk transport control is not performed. Corresponding to the occurrence of vibration, tracking drive control and spindle drive control need to further enhance tracking and suppress fluctuations in the rotation of the disk, so that the dynamic range of the output stage of the driver IC 12 can be expanded. Therefore, the driver IC 12 is supplied with a voltage of 6V and is not supplied with a voltage of 5V or 8V.

  Furthermore, when the operation mode is playback of data recorded on the disc and the disc is scratched, focus drive control, tracking drive control, sled drive control, and spindle drive control are performed, and disc transport control is not performed. In response to disc scratches, the focus drive control, tracking drive control, and spindle drive control need to reinforce the tracking of pits and tracks and keep the disc rotation more constant. There is a need to expand the dynamic range of the output stage, and a voltage of 6V is supplied to the driver IC 12, and a voltage of 5V or 8V is not supplied.

  Furthermore, when the operation mode is reproduction of data recorded on the disk and the disk is fluctuated, focus drive control, tracking drive control, sled drive control, and spindle drive control are performed, and disk transport control is performed. First, in response to the scratches on the disc, it is necessary to strengthen the tracking of the pits and tracks and keep the rotation of the disc more constant in the focus drive control, tracking drive control, and spindle drive control. Therefore, the driver IC 12 is supplied with a voltage of 6V and is not supplied with a voltage of 5V or 8V.

  Next, power control processing will be described with reference to the flowchart of FIG. In step S31, the determination unit 91 refers to the operation mode signal to determine whether the operation mode is a disk loading operation mode. If it is determined in step S31 that the operation mode is the disk loading mode, the procedure proceeds to step S32, and the power supply control unit 92 turns on the 8V power supply and turns off the 5V power supply and the 6V power supply. The procedure returns to step S31.

  That is, in step S32, the power supply control unit 92 turns on the relay 72, causes the driver IC 12 to supply the voltage of 8V from the power supply unit 71, turns off the relay 74 and the relay 76, and turns off the power from the power supply unit 73. The supply of the voltage of 6V and the voltage of 5V from the power supply unit 75 to the driver IC 12 is cut off.

  If it is determined in step S31 that the operation mode is not the disk loading operation mode, the procedure proceeds to step S33, and the determination unit 91 refers to the operation mode signal to determine whether the operation mode is the activation operation mode. If it is determined in step S33 that the operation mode is the startup operation mode, the procedure proceeds to step S32, and the power supply control unit 92 turns on the 8V power supply, turns off the 5V power supply and the 6V power supply, The procedure returns to step S31.

  If it is determined in step S33 that the operation mode is not the start-up operation mode, the procedure proceeds to step S34, and the determination unit 91 refers to the operation mode signal to determine whether or not the operation mode is a disc playback mode. If it is determined in step S34 that the operation mode is a disc playback operation mode, the procedure proceeds to step S35, and the determination unit 91 obtains the result of vibration detection, scratch detection, or disk fluctuation detection by the detection unit 93. Referring to this, it is determined whether or not vibration is detected, scratches are not detected, and disc fluctuation is not detected, that is, whether or not normal reproduction is being performed. If it is determined in step S35 that playback is normal, the procedure proceeds to step S36, where the power supply control unit 92 turns on the 5V power supply, turns off the 6V power supply and the 8V power supply, The procedure returns to step S31.

  That is, in step S36, the power supply control unit 92 turns on the relay 76, causes the driver IC 12 to supply 5V voltage from the power supply unit 75, turns off the relay 72 and the relay 74, and turns off 8V from the power supply unit 71. And the supply of 6V voltage from the power supply unit 73 to the driver IC 12 are cut off.

  If it is determined in step S35 that the reproduction is not normally performed, the procedure proceeds to step S37, and the determination unit 91 refers to the detection result of the detection unit 93 to determine whether or not the occurrence of vibration is detected. judge. If it is determined in step S37 that the occurrence of vibration has been detected, the procedure proceeds to step S38, and the power supply control unit 92 turns on the 6V power supply and turns off the 5V power supply and the 8V power supply. The procedure returns to step S31.

  That is, in step S38, the power supply control unit 92 turns on the relay 74 to supply the driver IC 12 with 6V voltage from the power supply unit 73, turns off the relay 72 and the relay 76, and turns off 8V from the power supply unit 71. And the supply of 5 V from the power supply unit 75 to the driver IC 12 are cut off.

  If it is determined in step S37 that the occurrence of vibration has not been detected, the procedure proceeds to step S39, and the determination unit 91 refers to the detection result of the detection unit 93 to scratch the reproduced disc. It is determined whether or not it has been detected. If a scratch is detected in the disc being played in step S39, the procedure proceeds to step S38, and the power control unit 92 turns on the 6V power supply and turns off the 5V power supply and the 8V power supply. The procedure returns to step S31.

  If it is determined in step S39 that no scratch has been detected on the disc being played, the procedure proceeds to step S40, and the determination unit 91 refers to the result of detection by the detection unit 93 to detect surface deflection and bias. It is determined whether or not a disc fluctuation such as a lead has been detected. If disk fluctuation is detected in step S40, the procedure proceeds to step S38, the power control unit 92 turns on the 6V power supply, turns off the 5V power supply and the 8V power supply, and the procedure proceeds to step S31. Return to.

  If no disc fluctuation is detected in step S40, the operation mode cannot be determined, and the procedure returns to step S31 without changing the voltage supplied to the driver IC 12.

  If it is determined in step S34 that the operation mode is not the disc playback operation mode, the procedure proceeds to step S41, and the determination unit 91 refers to the operation mode signal to determine whether or not it is the search operation mode. If it is determined in step S41 that the operation mode is the search operation mode, the procedure proceeds to step S32, and the power supply control unit 92 turns on the 8V power supply and turns off the 5V power supply and the 6V power supply. The procedure returns to step S31.

  If it is determined in step S41 that the operation mode is not the search operation mode, the procedure proceeds to step S42, and the determination unit 91 refers to the operation mode signal to determine whether or not the operation mode is the disc ejection. If it is determined in step S42 that the operation mode is the disk ejection mode, the procedure proceeds to step S32, and the power supply control unit 92 turns on the 8V power supply and turns off the 5V power supply and the 6V power supply. The procedure returns to step S31.

  If it is determined in step S42 that the operation mode is not the disc ejection operation mode, the operation mode cannot be determined, and the procedure returns to step S31 without changing the voltage supplied to the driver IC 12.

  In this way, it is determined whether or not the mode for driving the disc is the playback mode. If it is determined that the mode is the playback mode, it is determined whether or not the mode is the normal playback mode, and the disc is When the voltage supplied to the driving unit to be driven is determined to be in the reproduction mode, when it is determined not to be the normal reproduction mode, the voltage of 6 V is selected, and the reproduction mode is determined to be When it is determined that the normal reproduction mode is selected, a voltage of 5V lower than 6V is selected.

  Note that 5V, 6V, and 8V are examples of voltages, and any voltage can be used.

  Thus, by switching the power supply voltage of the driver IC 12 according to the operation mode, the power loss of the driver IC 12 can be reduced by reducing the power supply voltage during the disk reproduction, which is the most frequently operated, and as a result, the driver IC 12 The heat generation can be reduced.

  As described above, it is determined whether or not the mode for driving the disc is the playback mode, and when it is determined that the mode is the playback mode as the voltage supplied to the drive unit for driving the disc, the first mode is selected. When the voltage is selected and it is determined that the mode is not the reproduction mode, when the second voltage higher than the first voltage is selected, the operation is surely performed, the power loss is further reduced, and the heat generation is further reduced. can do.

  The series of processes described above can be executed by hardware or can be executed by software. When a series of processing is executed by software, a program constituting the software executes various functions by installing a computer incorporated in dedicated hardware or various programs. For example, it is installed from a program recording medium in a general-purpose personal computer or the like.

  The program is installed in the microcomputer 35 or the microcomputer 77 by being stored in a ROM or a RAM incorporated in the microcomputer 35 or the microcomputer 77 which is an example of the computer by mounting a removable medium in the drive. Can do. Further, the program is received by the communication unit via a wired or wireless transmission medium, and stored in the ROM or RAM incorporated in the microcomputer 35 or the microcomputer 77, so that the microcomputer 35 or the microcomputer 77 can store the program. Can be installed. In addition, the program can be installed in advance in the microcomputer 35 or the microcomputer 77 by storing in advance in a ROM or RAM built in the microcomputer 35 or the microcomputer 77.

  The program executed by the computer may be a program that is processed in time series in the order described in this specification, or in parallel or at a necessary timing such as when a call is made. It may be a program for processing.

  The embodiments of the present invention are not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the present invention.

  DESCRIPTION OF SYMBOLS 11 ... Power supply switching part, 12 ... Driver IC, 13 ... Focus coil, 14 ... Tracking coil, 15 ... Spindle motor, 16 ... Thread motor, 17 ... Disk conveyance motor, 31 ... Power supply part, 32 ... Relay, 33 ... Power supply part 34 ... Relay, 35 ... Microcomputer, 51 ... Determining unit, 52 ... Power source control unit, 61 ... Power source switching unit, 71 ... Power source unit, 72 ... Relay, 73 ... Power source unit, 74 ... Relay, 75 ... Power source unit, 76 ... Relay, 77 ... Microcomputer, 91 ... Determination part, 92 ... Power supply control part, 93 ... Detection part

Claims (6)

In a disc playback device that plays back data recorded on a disc,
A first power supply for supplying a first voltage;
A second power supply for supplying a second voltage higher than the first voltage;
Determining means for determining whether or not the mode for driving the disc is a reproduction mode;
When it is determined that the playback mode is the voltage supplied to the drive unit for driving the disc, the first voltage is selected, and when the playback mode is determined not to be the playback mode, the second voltage is selected. And a selection means for selecting a disc reproducing apparatus. The disc player according to claim 1, wherein
The determination unit determines that the mode is not the playback mode when the disc playback device is activated, when the disc is loaded, when the search is performed, or when the disc is ejected. . The disc player according to claim 1, wherein
A third power supply for supplying a third voltage lower than the first voltage;
The determination means determines whether or not it is a normal playback mode when it is determined that the playback mode is selected;
The selection means selects the first voltage as the voltage supplied to the drive unit when it is determined that it is not the normal playback mode when it is determined that the mode is the playback mode, and the playback is performed. When it is determined that the mode is the normal playback mode, the third voltage is selected when it is determined that the mode is the normal playback mode. The disc player according to claim 3, wherein
The determination means determines that the mode is not the normal playback mode when vibration occurs, the disk is flawed, or the disk has runout or eccentricity. . A first power source for supplying a first voltage; a second power source for supplying a second voltage higher than the first voltage; a drive unit for driving a disk; a determination unit; and a selection unit. In the disc playback method of the disc playback device for playing back the data recorded on the disc,
A determination step of determining whether or not the mode for driving the disk is a reproduction mode by the determination means;
When the selection unit determines that the reproduction mode is the voltage to be supplied to the drive unit, the first voltage is selected, and when the determination is not the reproduction mode, the second And a selection step for selecting a voltage. A disk reproducing apparatus comprising: a first power source that supplies a first voltage; a second power source that supplies a second voltage higher than the first voltage; and a drive unit that drives the disk. To a computer that controls a disk playback device that plays back data recorded on a disk,
A determination step of determining whether or not the mode for driving the disc is a reproduction mode;
Selection that the first voltage is selected as the voltage to be supplied to the driving unit when the reproduction mode is determined, and the second voltage is selected when the reproduction unit is determined not to be the reproduction mode. A program that performs processing including steps and.

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