TWI343562B - Controlling apparatus and controlling method for pick-up head of optical recording/reproducing device - Google Patents

Description

1-34^562 100th March '15th Nuclear Replacement Page VI. Description of the Invention: [Technical Field of the Invention] [0001] The present invention relates to a read head control device for an optical disk drive and a control method therefor. [Prior Art] [0002] Optical storage technology has become more and more widely used in people's work and life, especially optical recording/reproducing devices such as CD players and burners have become important tools in the field of data storage. [0003] Please refer to FIG. 1, which is a schematic diagram of a recording/reproduction operation of a message. The optical pickup 14 and the optical ratchet drive device 16 include a stepping motor 116, a guide screw, a ^W^||120, and the like. The spindle motor 12 is used to drive the rotation of the optical disc 20, the stepping motor 16 is driven to rotate, the lead screw 118 is driven to move the optical reading _4 in the direction of the lead screw 118 ,, and the limit switch 120 is read by the 嫜 嫜 f The % head 14 is moved by the conductive screw 11 8 to the polar read head 14 for emitting a light beam onto the optical disk 2 and returning the light beam for recording/reproduction of the message. [0004] Different formats of optical discs have different requirements for the wavelength of the light source of the optical pickup, the objective lens, etc. In order to adapt to the different reading conditions, after the optical disc drive 10 loads the optical disc 20, it is necessary to first judge the loaded optical disc. For the type of 20, the reading condition suitable for the optical disc 20 can be selected. [0005] Referring to FIG. 2, the optical disc 20 includes a lead-in area 222 (Lead-in Area), a data storage area 224 (Data Area), and a lead-out area 226 (

Lead-out Area) and so on. The disc records data from the inner ring to the outer ring 095110284 Form No. A0101 Page 4 of 26 1003085927-0 1343562 The page is being replaced after March 15, 100, so if the recorded message is not enough to record the entire disc When there is a blank area of the unrecorded message on the outer circumference of the optical disc, the optical reading head generally does not read the blank area. Therefore, when the disc type is judged, the data storage area 224 is generally used. The starting position, that is, the area adjacent to the lead-in area 222 is used as the judgment position. [0006] After receiving the disc type determination command, the stepping motor 116 first drives the optical pickup 14 to move toward the inner circumference of the optical disc 20 until the optical pickup 14 reaches the innermost position of the optical disc. At the office. The stepper motor 116 then reversely drives the optical pickup 14 to move outward a predetermined distance until the position B of the data storage area 224 adjacent to the lead-in area 222, and the disc type determination is made at the position B. When the optical pickup 14 moves to the innermost position A of the optical disc 20, the limit switch 120 is activated, so that the optical disc drive 10 controls the stepping motor 116 to stop rotating according to the limit signal issued by the limit switch. The optical pickup 14 遂 stops moving. [0008] However, setting the limit switch in the optical disc drive increases the cost of the optical disc drive, and at the same time, the volume of the optical disc drive becomes larger, and the 'mechanical structure also becomes complicated. [Invention content] [0009] In view of this, there is It is necessary to provide a read head control device for an optical disk drive that can omit the limit switch. [0010] Furthermore, it is also necessary to provide a read head control method for an optical disk drive. [0011] A read head control device for an optical disc drive for controlling movement of a read head for disc type determination, the control device comprising a controller and a driver 095110284 Form No. A0101 Page 5 of 26 Page 303085927-0 1343562 On March 15th, the '15th nuclear replacement page, the controller is used to send a control command to the driver, and the driver outputs a driving voltage according to the control commands to drive the read head to move. The controller includes an instruction storage module and an instruction sending module; the instruction storage module stores a series of movement instructions, and the instruction sending module is configured to send the movement instructions to the driver, so that the driver moves according to the The command sequentially outputs a first driving voltage and a second driving voltage, wherein the first driving voltage is used to drive the read head to move in an outer ring direction, and the second driving voltage is opposite in polarity to the first driving voltage for driving the optical The reading head moves in the direction of the inner ring. .,.v ' :.

[0012] [0015] [0016] A CD player reading %:

The command interaction module receives the optical disc type command sending module, and the mobile finger driver sequentially outputs the first moving voltage and the second medium driving voltage according to the moving commands to respectively drive the phosgene reading to move in the outer ring direction and the inner ring direction, The second drive voltage has the opposite polarity.

The reading head of the above-mentioned optical disc drive and the control method of the cutting cold @ method output a driving voltage with a polarity change after receiving the disc judgment command, and drive the reading head to move toward the outer ring of the optical disc for a certain distance, and then move to the inner circumference of the optical disc. By appropriately setting the time required for the movements, the final position of the read head can be placed at a predetermined position for disc type determination without setting a limit switch in the read head drive, thus reducing the disc drive. The cost of the cost, the structure of the CD player has also become simple. [Embodiment] Referring to Figure 3, the optical disk drive 30 includes a spindle motor 32, a read head 34, and a read 095110284. Form No. A0101 Page 6 of 26 pages 1003085927-0 [0017] 1343562. Head drive unit 36, etc. Month! ^ ^ , the pickup head drive unit 36 includes a motor 334 and a transmission mechanism 336 temple. The rotation of the motor 34 drives the transmission mechanism 336 to rotate, and the transmission mechanism 336 thereby causes the pickup head 34 to move. The drive mechanism grips the surface of the disc 平行, which is parallel to each other, so that the read head 34 can maintain a fixed distance from the surface of the recording medium of the optical disc 38 as it moves along the transmission mechanism 336. The read head emits a light beam to the optical disc 38. And receiving the light beam returned by the light (4) for recording/reproduction of the message. [_ The head drive device 36 of the optical disk drive 30 further includes a control unit state, and the control unit 340 is configured to output the bonus ink to the The motor 334 controls the start, stop, and rotational speed of the motor 334, etc. Just now, referring to Fig. 4, the control unit 34 includes a controller 42 and a driver.

The controller 42 includes an instruction storage module 422, an instruction transmission module 424, a timer module 426, and a determination module 428. The command storage module 422 stores a command for driving the motor 334 to rotate. The commands are sent to the driver 44 by the command sending module 424, and the driver 44 sends different driving voltages to the motor 334 according to the received command. To control the rotation of the motor 334: thus the 'rotational state of the motor 334: varies with the instructions. [0020] The timing module 426 is configured to time the duration of the command sent by the command sending module 424, and transmit the timing signal to the determining module 428; the determining module 428 will receive the received timing signal and the command The duration should be compared to determine whether the currently sent command has been sent, so that the command sending module 424 selects the next command to send from the command storage module 422. [0021] The disc player 30 performs the disc class 32 determination at least applicable to The following two conditions 095110284 Form bat number 1010101 Page 7 / Total 26 pages 1003085927-0 1343562 [0023] [0024] 100 years 〇 March, 5 nuclear replacement goods: one is the CD-ROM power, After the system is initialized, the other is that the tray of the optical disc machine is out of the warehouse and then enters the warehouse. Therefore, the controller 42 further includes a command interaction module 432 and a command recognition module 434. The command interaction module 432 is configured to receive the input disk. The slice determines the command and transmits the received outer boundary command to the command recognition module 434. The command recognition module 434 determines that the external command is the disc type judgment command when the disc machine 3 is in the working state. The control command transmission module 424 selects a different instruction set from the instruction storage module 422 to issue. The controller 42 issues command control, and the optical pickup head 32 enters ': > f-..' V~:. After the rough movement is completed, % is detected whether there is an adjustment read head forbearing 4 for a slight shift 42 . When the controller makes a type judgment in the case of entering the warehouse after the tray is out of position, the command interaction module 432 is also used to send the tray out signal and receive the tray indicating that the tray of the optical disc machine 30 has been loaded into the handle glfettua| Referring to FIG. 5, after receiving the first disc class, the controller 42 sends an instruction to the driver 44 to drive the control voltage to drive the read head 34 to perform the three stages of a, b, and c. [0025] The controller 42 first sends a first outer ring movement command to the driver 44' so that the driver 44 outputs the first driving voltage \ to drive the read head 34 to move toward the outer circumference of the optical disk 38. Preferably, the distance of the movement is not less than half of the distance from the innermost circumference to the outermost circumference of the optical disc 38. [0026] At the b stage of the movement of the read head 34, the controller 42 transmits the first inner ring moving finger 095110284 Form No. A0101 Page 8 of 26

[0028] [0030] [0030] [0030] 095110284 March 15, 100, according to the positive wattage to the driver 44' and thus the driver 44 outputs a second driving voltage U2 to drive the read head 34 Move toward the inner circumference of the optical disc 38. Preferably, the second driving voltage U2 is opposite to the polarity of the first driving voltage ^ such that the moving direction of the read head 34 driven by the second driving voltage 112 is driven by the first driving voltage U? The direction of movement is reversed. This movement should cause the read head 34 to reach the innermost position of the disc 38. At the c stage of the movement of the read head 34, the controller 42 sends a second outer ring movement command to the driver 44, so that the driver 44 outputs the third drive voltage u to move the read head 34 toward the outer circumference of the optical disk 38. Preferably, the movement is such that the read head 34 reaches the area of the data storage area of the optical disc 38 adjacent to the lead-in area for the determination of the type of the optical disc 38. > . With the flow of the driving method described in Fig. 6, the read head driving unit 36 can drive the read head 34 to perform the above-described movement of a, b, and c stages. First, in step 602, the command interaction module 432 receives the disc type determination command input by the outside world, and passes the disc type judgment command to the command recognition module 434 for identification. Step 604, the command recognition module 434 identifies the type of the received outbound command, and notifies the instruction sending module 422 of the recognition result, so that it selects a control instruction corresponding to the working mode from the instruction storage module 422 to perform the sending step 606. If the result of the command recognition module 434 indicates that the disc type determination command is the CD-ROM power-on, and the disc-type determination command is performed after the system is initialized, the command transmission module 424 selects the initialization disc movement from the instruction storage module 422. The instruction set is sent. Form No. A0101 Page 9 of 26 1003085927-0

1343562 100 March *15 [0033] Step 608, the command sending module 424 selects the first outer ring move command from the command storage module 422 and sends the command to the driver 44. The driver 44 outputs the first driving voltage according to the first outer ring moving command, and the motor 334 starts to rotate, and drives the reading head 34 to move toward the outer ring of the optical disk 38. This step 608 will cause the read head 34 to perform a 3-stage movement 0 as shown in FIG. 5, and the first outer ring movement command indicates that the duration of the first driving voltage \ is the first time interval ', the timing module 426 starts timing and will

The timing signal obtained from the optical disc 38 is sent to the judgment ^^2^1 to determine whether the first outer ring movement command has been sampled for a time interval T1 at the innermost circle of the first Hi dynamic voltage u. [0035] Step 610, the determining module 428 compares the received meter with the first time interval T丨 to determine whether the second motion command being transmitted has been transmitted. If not, ^ is timed and step 612, if the first outer ring moves (the ceremony is sent, the command sends the timing signal to the judgment mode.

The module 424 sends a stop command to instruct the driver 44 to output the voltage drive motor 334 to stop rotating, and the read head 34 遂 stops moving; meanwhile, the timing signal returns to zero [0036] Step 614, the command sending module 424 from the command storage module 422 The first inner circle movement topology is selected and sent to the driver 44. The driver 44 outputs a second driving voltage ^, and the motor 334 drives the reading head 34 to move toward the inner circumference of the optical disc 38. This step 614 causes the reading head 34 to enter 095110284. Form number A0101 笫丨〇 page / total 26 pages 1003085927 -0 1343562 . ___ [After the next year of March, I is replacing the i-line as shown in Figure 5 for the b-stage movement. _7] 13⁄4, the first inner ring movement command indicates that the second driving voltage \ duration B (four) is the second time interval T2 'the timing module 426 starts timing, and the obtained timing signal is sent to the determining module 428, so that It determines whether the first inner circle movement command has been transmitted. Preferably, the second time interval Τ2 is a time required for the read head 34 to move from the outermost ring position to the innermost position of the optical disk 38 under the control of the d-th drive voltage U2.

I

[0038] Step 616, the determining module 428 compares the received timing reading number with the second time Φ (5) by T2 to determine whether the first-inner ring moving command being transmitted has been transmitted. If the transmission has not been completed, the timing is continued and the timing signal is transmitted to the determination module 4 2 8 for determination. [0039] Step 618 'If the first inner circle movement command has been sent, the command sending module 424 sends a stop command, instructing the driver 44 to output the voltage drive motor 334 to stop rotating, and the read head 34 遂 stops moving; meanwhile, the timing signal Return to zero. [0040] Step 620, the command sending module 424 selects a second outer ring moving command from the command storage module 422, and sends the command to the driver 44. The driver 44 outputs the third driving voltage accordingly. \, the motor 334 遂 drives the read head 34 to move toward the outer circumference of the optical disc 38. This step 620 will cause the read head 34 to perform the c-stage movement as shown in FIG. 5 [0041] Meanwhile, the second outer ring move command indicates that the duration of the third drive voltage 113 is the third time interval!\ The timing module 426 starts timing and sends the obtained timing signal to the determining module 428 to determine whether the second outer ring moving command has been transmitted. Preferably, the third time interval 095110284 form number Α 0101 page 11 / total page 26 1003085927-0 B43562 [0042] 100 years March '15 days · 3 is under the control of the third driving voltage U3 The take-up head 34 is moved from the innermost position of the first disc 38 to the time τρ3 required at the position of the data storage area of the optical disc 38 adjacent to the lead-in area. In step 622, the determining module 428 compares the received timing signal with the third time interval Τ '3 to determine whether the second outer circle moving command being transmitted has been transmitted. If the transmission has not been completed, the timing is continued and the timing signal is transmitted to the determination module 428 for determination. [0043] Step 624, if the second outer ring movement command has been sent, the command sends 334 to stop rotating, and praises the timing signal ^ zero. ' ^ [0044]

Step 626 'Commands the interactive module to issue a whisper command. If the CD-ROM machine issues a fine-tuning command, execute ^^^28, the command sends: the module 424 selects a tuning command from the command storage module 422, and sends the command to the driver 44. The drive key ^ voltage, the motor 334 遂 drives the read head 34 to move a small distance in the vicinity of the position of the step take-up head 34. ~02

[0045] If the command interaction module 432 detects that the CD player 3 has no fine-tuning command issued, the control unit 40 controls the end of the movement of the read head 34. [0046] 095110284 Referring to FIG. 7, when the disc type determination is performed in the case where the tray of the optical disc drive is unloaded, the read head driving device 36 drives the read head 34 to move and the flow of the method is as shown in FIG. The driving method when the disc drive is powered on and the disc type is judged after the system is initialized is similar. Only after the command recognition module 434 recognizes that the external command is the tray of the disc player, the form number is A0101. / Total 26 pages 1〇〇3〇85927, 〇1343562. After performing the disc type judgment in the case of the nuclear normal position on March 15, 100 (step 604), proceeding to step 702 'the instruction transmitting module 424 from the instruction storage module 422 Select the inbound and outbound disc judgment move instruction set to send. Thereafter, step 608 is performed to transmit a first outer ring movement command ' to drive the read head 34 to perform a phase shift. [0047] After the first outer ring movement command is transmitted (step 61A), step 704 'the command transmission module 424 sends a stop command to instruct the driver 44 to output the voltage drive motor 334 to stop rotating. 'The read head 34 遂 stops moving. At the same time, the timing signal is reset to zero, and the command interaction module 432 issues a warehouse order indicating that the tray of the optical disk drive 30 can be taken out. In step 706, the command interaction module 432 detects whether the optical disk drive 30 sends a signal indicating that the tray has been loaded into the warehouse. If the tray has been loaded into the warehouse, the detection continues. [0049] If the command interaction module 432 detects that the tray of the optical disk drive has been completed, the steps 614 and subsequent steps are performed, and are not described again. [0050] The read head control device of the above optical disc drive and the control method thereof first drive the read head to move toward the outer ring of the optical disc and then move to the inner circumference of the optical disc after receiving the optical disc • the judgment command. The time of the movement can make the final position of the read head at a predetermined position for disc type judgment without having to set a limit switch in the read head driving device, thereby reducing the cost of the optical disc drive. The structure has also become simple, and the product of the optical disk drive has also been reduced. [0051] In summary, the present invention conforms to the patent requirements of the invention, and the patent application is filed according to law. However, the above description is only a preferred embodiment of the present invention, and those who are familiar with the skill of the present invention are in the spirit of creating the case. Equivalent 095110284 Form No. A0101 Page 13 / Total 26 Page 1003085927-0 1343562 [0055] [0056] [0056] [0060] [0060] [0066] [0066] [0066] 095110284 The correction of the replacement page modification or change on March 15th, '15th, should be included in the following patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of message recording/reproduction of a conventional optical disk drive. 2 is a schematic view showing the structure of the optical disc. 3 is a schematic structural view of an optical disk drive according to a preferred embodiment. 4 is a schematic structural view of the control unit shown in FIG. 3. Fig. 5 is a view showing the movement of the pickup driving device of the optical disk drive shown in Fig. 3 for driving the reading head.

Fig. 6 is a flow chart of the method for the movement of the optical disk drive and the movement of the system read head. Fig. 7 is a flow chart showing the driving method for the movement of the optical disk drive after the tray is taken out of the warehouse.

Unit drive | J unit drive read [Main component symbol description] CD player: 30 spindle motor: 32

InteliecfuaiPrcoertv vfr}tt?rp

Optical pickup: 34 Drive: 36 Disc: 38 Motor: 334 Transmission: 36 Control unit: 340 Form number A0101 Page 14 of 26 1003085927-0 1343562 [0067] [0069] [0070] [0073] [0073] 100th March 15th Nuclear: Positive Replacement Page

[0076] [0076] Controller: 42 Driver: 44 Command Storage Module: 4 2 2 Command Sending Module: 424 Timing Module: 426 Judging Module: 428 Command Interaction Module: 432 Command Identification Module :434 Power-on initialization initialization disc drive process after the warehouse exits the warehouse to determine the disc drive process 602-628 702-706

095110284 Form No. A0101 Page 15 of 26 1003085927-0

Claims (1)

H43562 On March 15, 100, according to the replacement page VII, the scope of application for patents·· 1. A read head control device for the optical disc drive for controlling the movement of the read head for disc type determination, the control device including the controller And a driver for transmitting a control command to the driver, the driver outputting a driving voltage according to the control commands to drive the read head movement, wherein the controller comprises: an instruction storage module and an instruction sending module The instruction storage module stores a series of movement instructions, and the instruction sending module is configured to send the movement instructions to the driver, so that the driver sequentially outputs the first driving voltage according to the movement instructions, the first 2. The control device of the optical disk drive according to claim 1, wherein the controller further comprises a command interaction module and a life module; the command ./'..ν'* is transmitted to the command This command identifies the type of command received outside the boundary, and according to. Let the interaction module be used to receive the instruction set sent from the outside world. 3. The read head control device of the optical disc drive according to claim 2, wherein the command interaction module is further configured to receive a fine adjustment command issued by the optical disc drive, and the instruction sending module sends an adjustment instruction according to the fine adjustment command. In order to make the read head make a small range of adjustment movement. 4. The read head control device of the optical disk drive according to claim 1, wherein the command transmitting module issues a first outer ring movement command to the drive, so that the drive output duration is the first time interval. The first drive 095110284 Form No. 1010101 Page 16 / Total 26 Page 1003085927-0 On March 15th, 100, the page change voltage is applied to the motor, thereby driving the read head to move toward the outer ring of the disc. The read head control device of the optical disk drive according to Item 4, wherein the first time IWi is driven by the first driving voltage, the read head is moved from the innermost position of the optical disk to the outermost position of the optical disk. One and a half times the time required for the circle position. The read head control device of the optical disc drive according to the fourth aspect of the invention, wherein the controller further comprises a timing module and a judging module, wherein the timing module outputs the first outer ring of the controller The duration of the movement command is timed, and the timing signal is transmitted to the determination module; the determination module compares the received timing signal with the first time interval to determine whether the first outer circle movement instruction is sent. . The read head control device of the optical machine according to claim 6, wherein the command interaction module is further used to output a tray out command after the first outer ring movement command is sent, thereby The tray of the disc player is ordered to start the warehouse according to this order. The read head control device of the optical disc drive according to the first aspect of the invention, wherein the command transmitting module sends a first inner ring movement command to the drive, so that the drive output duration is a second time interval. The second driving voltage is applied to the motor, thereby driving the reading head to move toward the inner ring of the optical disc, such as the read head control device of the optical disc drive according to claim 8 of the claim, wherein the command interaction module is further used Receiving a signal indicating that the tray of the optical disc drive has been loaded, the command sending module sends the first inner ring moving command to the drive according to the incoming signal. For example, the optical disc of the 8th item of the patent research scope; the read head control device form number A0101, page 7 / total 26 pages 1003085927-0 1100, March 15 曰 correction replacement page, the second driving voltage and The first driving voltage has the opposite polarity. The read head control device of the optical disc drive according to claim 8, wherein the β-time interval is at least driven by the second drive voltage, and the read head is moved from the outermost position of the optical disc to the The time required for the innermost position of the disc. The read head control device of the optical disc drive according to the eighth aspect of the invention, wherein the controller further comprises a timing module and a judging module, wherein the timing module outputs the first-inner loop movement command output by the controller The timing is 13 to drive the read head to the outer disk of the optical disc. 14. The head control device according to claim 13 of the patent application, wherein the third driving voltage is the same as the polarity of the voltage. Such as Shen. The read head control device of the optical disk drive according to Item 13, wherein the third time interval is at least the position of the read head from the innermost position of the optical disk t (4) to the optical disk driven by the third driving voltage The time required for the data storage area to be adjacent to the lead-in area. °95110284 'The timing signal is transmitted to the judgment wall. The judgment module will receive the above-mentioned patent. S leave the eighth item | The device, wherein the first inner ring movement command belongs to the | Also rotating a first_outer ring movement command to the driver, the driver outputting a third drive duration of the second time interval to the motor, thereby • The reading and processing device of the vehicle according to the application of the full-time @ item 13, wherein the controller further comprises a timing module and a judging module, wherein the timing module moves the second outer ring outputted by the controller The duration of the command is timed' and the timing signal is transmitted to the judgment module; the judgment module will receive the received form number Α0Ι0Ι page 18/26 pages 1003085927-0 1343562 17 . 18 . 19 _ 20 · 21 100 years On March 15th, the timing signal of the replacement page is compared with the third time interval to determine whether the second outer ring movement command is transmitted. A method for controlling a read head of an optical disc drive comprises the steps of: commanding an interactive module to receive a disc type judgment command; and instructing the transmission module to send a movement instruction to the driver; the driver sequentially outputting the first driving voltage and the second driving according to the moving instructions The voltage drives the optical pickup to move in an outer ring direction and an inner ring direction, respectively, and the second driving voltage is opposite in polarity to the first driving voltage. The method for controlling the read head of the optical disc drive according to claim 17 , further comprising: the command recognition module identifying the command type received by the command interaction module; the command sending module is identified by the command recognition module The command type selects the corresponding instruction set from the instruction storage module. The method for controlling a read head of an optical disk drive according to claim 17, wherein the command sending module selects a first outer ring move command from the command storage module to send to the drive, so that the drive output continues The time is the first driving voltage of the first time interval to the motor, thereby driving the reading head to move toward the inner ring of the optical disc. The method for controlling a read head of an optical disk drive according to claim 19, wherein the first time interval is at least driven by the first driving voltage, and the read head is moved from the innermost position of the optical disk to the optical disk. One and a half times the time required for the outermost circle position. The method for controlling the read head of the optical disk drive according to claim 19, further comprising: the command sending module sending the first outer ring moving command to the driver, the timing module starts timing, and the timing signal is transmitted to the Judgment module; 095110284 Form No. A0101 Page 19/Total 26 Page 1003085927-0 1343562 _ '100 Years of March' 15th Shuttle Replacement 茛 Judgment Module compares the timing signal with the first time interval to determine the Whether an outer circle move command is output. The method for controlling the read head of the optical disc drive according to claim 21, wherein the method further comprises: after the outputting of the first outer ring movement command is completed, instructing the interaction module to output a warehouse order; The outbound order is issued. 23. The method for controlling the read head of the optical disk drive according to claim 17 of the patent application, . The output duration is driven by the read head control method, wherein the instruction sending module selects the first inner circle movement instruction from the finger-free recording to send to the second time interval of the drive: the second drive >. The head moves to the direction of the 4th direction of the optical disc. 24, as in the 23rd item of the patent application, the method further includes: the command interaction module receives the signal; the command recognition module recognizes the signal that the signal y莰to has entered the warehouse and notifies the instruction Send a mode move command. 25. The method of controlling a read head of a 6-disc machine as claimed in claim 23, wherein the second time interval is at least the outermost circumference of the optical disc driven by the second driving voltage The time it takes for the position to move to the innermost position of the disc. The method for controlling the read head of the optical disc drive according to claim 23, further comprising: the command sending module sending the first inner ring moving command to the driver, the timing module starts timing, and the timing signal is The determination module transmits the timing signal to the second time interval to determine the 095110284 form number A0101 page 20/26 page 1003085927-0 100 years March 15th Whether the circle move command is output. For example, the method for controlling the read head of the optical disc drive of the special (4) rhyme, wherein the first (four) (four) refers to reading t money, the sending module of the age is also sent from the command to the second "material command to the drive" So that the driver outputs a third driving voltage having a duration of a third time interval to the motor, thereby driving the read head to move in a direction of (four) (four) turns. For example, the read head of the optical disk drive according to item 27 of the special rhyme is applied. a control method, wherein the second driving voltage is the same as the polarity of the 胄_ driving voltage. The method for controlling the read head of the optical disk drive according to claim 27, wherein the second time interval is at least the third The time required for the read head to be moved from the innermost position of the optical disc to the position adjacent to the lead-in area of the data storage area of the optical disc driven by the driving voltage, as in the optical disc drive described in claim 27 The read head control method further includes: the command sending module sends a second outer ring moving command to the driver, the timing module starts timing, and the timing signal is transmitted to the determining module; The signal is compared with the third time interval to determine whether the first outer ring movement command is output. The read head control method of the optical disk drive according to claim 30, further comprising: the command interaction module Receiving a fine-tuning command issued by the optical disc drive; the command sending module sends an adjustment command from the command storage module to the driver according to the fine-tuning command; the driver outputs a driving voltage to the motor, so that the read head makes a small distance Adjustment movement. Form number A0101 Page 21 of 26 1003085927-0