CN119446199A - Optical drives and data processing equipment - Google Patents
Optical drives and data processing equipment Download PDFInfo
- Publication number
- CN119446199A CN119446199A CN202310959962.9A CN202310959962A CN119446199A CN 119446199 A CN119446199 A CN 119446199A CN 202310959962 A CN202310959962 A CN 202310959962A CN 119446199 A CN119446199 A CN 119446199A
- Authority
- CN
- China
- Prior art keywords
- opu
- driving
- optical disc
- motor
- optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
Landscapes
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
本申请提供了一种光驱，应用于光存储领域。光驱包括光学读取单元OPU、驱动电机、导轨和主轴电机。主轴电机用于承载并旋转光盘片。驱动电机用于带动OPU沿导轨运动，以读取光盘片上存储的数据或在光盘片上存储数据。OPU的运动轨迹为单向直线运动和正弦运动的合成运动。在本申请提供的技术方案中，通过将重复的正弦运动施加到驱动电机，能够减小物镜的运动区间，从而降低由于物镜运动导致的两个光斑之间的距离变化，从而提高数据存储或读取的可靠性。
The present application provides an optical drive, which is applied to the field of optical storage. The optical drive includes an optical reading unit OPU, a drive motor, a guide rail and a spindle motor. The spindle motor is used to carry and rotate the optical disc. The drive motor is used to drive the OPU to move along the guide rail to read data stored on the optical disc or store data on the optical disc. The motion trajectory of the OPU is a composite motion of unidirectional linear motion and sinusoidal motion. In the technical solution provided by the present application, by applying repeated sinusoidal motion to the drive motor, the motion range of the objective lens can be reduced, thereby reducing the distance change between the two light spots caused by the movement of the objective lens, thereby improving the reliability of data storage or reading.
Description
Technical Field
The present application relates to the field of optical storage, and in particular to optical drives and data processing devices.
Background
In the blu-ray multi-layer storage scheme, to increase the storage capacity of the optical disc, a plurality of data tracks in the data layer may share the wobble track of the wobble layer. Wherein the wobble layer is also called a wobble layer. The wobble track is also called a wobble track. The optical drive generates a dual beam. The red and blue spots remain at a fixed distance. The red light is focused and tracked on the wobble layer. Blue light is focused on the data layer. Blue tracking follows red light. In practical application, the center of the swing track is not concentric with the rotation center of the optical disc, and there is an eccentric distance between the center of the swing track and the rotation center of the optical disc. Therefore, in order to make it possible for the red light to follow the wobble track, it is necessary to change the position of the objective lens in the OPU by an optical pick-up unit (OPU) motor so that the objective lens moves in the radial direction of the optical disc. The moving track of the objective lens forms a sine wave of one period every time the optical disc rotates one round. Thus, the motion profile of the objective lens comprises a repeated sinusoidal motion.
When the position of the objective lens changes, the distance between the two spots is affected. And, this distance is affected by the eccentric distance. Therefore, the distance between the two spots may be different after each repositioning of the optical disc, thereby affecting the storage or reading of data.
Disclosure of Invention
The present application provides an optical disc drive and a data processing apparatus capable of reducing a movement section of an objective lens by applying a repeated sinusoidal movement to a driving motor, thereby reducing a distance variation between two light spots due to the movement of the objective lens, and thus improving reliability of data storage or reading.
The first aspect of the application provides an optical drive. Comprises an OPU, a driving motor, a guide rail and a spindle motor. The spindle motor is used for bearing and rotating the optical disc. The driving motor is used for driving the OPU to move along the guide rail so as to read the data stored on the optical disc or store the data on the optical disc. The motion track of the OPU is a composite motion of unidirectional rectilinear motion and sinusoidal motion.
In an alternative form of the first aspect, the OPU includes an OPU motor and an objective lens. The OPU motor is used for driving the objective lens to linearly reciprocate along the radial direction of the optical disc. The movement interval of the linear reciprocating movement is less than or equal to 10 micrometers. By defining the movement interval of the linear reciprocating movement, the distance change between the two light spots can be further reduced, thereby improving the reliability of data storage or reading.
In an alternative form of the first aspect, the optical drive further comprises processing circuitry. The OPU further includes a laser and a photodetector. The laser is used for generating a first light beam, and the first light beam is incident to the optical disc through the objective lens. The photodetector is used for receiving the first light beam reflected from the optical disc through the objective lens and converting the reflected first light beam into an electric signal. The processing circuit is used for obtaining a first driving signal according to the electric signal. The driving motor is used for driving the OPU to move along the guide rail according to the first driving signal. The driving signal of the driving motor is obtained through the electric signal, so that the similarity of actual deviation caused by sinusoidal motion and non-concentricity in the combined motion can be improved, and the reliability of data storage or reading is improved.
In an alternative manner of the first aspect, the OPU motor is configured to drive the objective lens to perform a linear reciprocating motion along a radial direction of the optical disc according to the second driving signal. The processing circuit is also used for obtaining a third driving signal according to the second driving signal and the electric signal. The driving motor is also used for driving the OPU to move along the guide rail according to the third driving signal. There may also be a motion profile in the second drive signal that can be converted into a sinusoidal motion. By transferring the part of the motion trail to the driving motor, the motion interval of the objective lens can be further reduced, so that the reliability of data storage or reading is improved.
In an alternative form of the first aspect, the drive motor comprises a stator and a mover. The mover and OPU are fixed. The stator and the guide rail are relatively fixed in position. The driving motor is used for driving the mover and the OPU to move along the guide rail.
In an alternative form of the first aspect, the stator is a permanent magnet. The mover is a coil.
In an alternative form of the first aspect, the number of pairs of stators is 2, and the stators and the guide rail are arranged in parallel. By increasing the logarithm of the stator, the stability of the OPU during the synthetic motion can be improved, thereby improving the reliability of data storage or reading.
A second aspect of the application provides a data processing apparatus. The data processing apparatus comprises a processor and an optical drive as described in the first aspect or any of the alternatives of the first aspect. The processor is for transmitting data to and/or receiving data from the optical drive. When the processor is used to transfer data to the optical drive, the optical drive is used to store data on the optical disc. When the processor is used for receiving data from the optical drive, the optical drive is used for reading the data stored on the optical disk.
A third aspect of the present application provides a data reading or storing method. The data reading or storing method can be applied to a data processing device or an optical drive. The data reading or storing method will be described below taking an example in which the data reading or storing method is applied to a data processing apparatus. The data reading or storing method includes the steps that the data processing equipment rotates the optical disc, and the data processing equipment drives the OPU to move along the guide rail through the driving motor so as to read data stored on the optical disc or store data on the optical disc. Wherein the motion track of the OPU is the composite motion of unidirectional linear motion and sinusoidal motion.
In an alternative form of the third aspect, the data reading or storing method further comprises the step of the data processing apparatus driving the objective lens in the OPU to perform a linear reciprocating motion in a radial direction of the optical disc by means of the OPU motor. The movement interval of the linear reciprocating movement is less than or equal to 10 micrometers.
In an alternative form of the third aspect, the data reading or storing method further comprises the steps of the data processing device generating a first light beam, entering the first light beam to the optical disc through the objective lens, the data processing device receiving the first light beam reflected from the optical disc, converting the reflected first light beam into an electrical signal, and the data processing device deriving the first drive signal from the electrical signal. The data processing device drives the drive motor via the first drive signal to move the drive motor with the OPU along the rail.
In an alternative form of the third aspect, the data processing apparatus drives the OPU motor by the second drive signal so that the OPU motor drives the objective lens in the OPU to perform a linear reciprocating motion in a radial direction of the optical disc. The data reading or storing method further comprises the step of the data processing device deriving a third drive signal from the second drive signal and the electrical signal. The data processing device drives the drive motor via the third drive signal to move the drive motor with the OPU along the rail.
A fourth aspect of the present application provides a drive motor. The driving motor includes a stator and a mover. The mover is used for fixing with the OPU. The driving motor is used for driving the mover and the OPU to move along the guide rail. The stator and the guide rail are relatively fixed in position.
In an alternative form of the fourth aspect, the stator is a permanent magnet and the mover is a coil.
In an alternative form of the fourth aspect, the number of pairs of stators is 2, and the stators and the guide rail are arranged in parallel.
Drawings
FIG. 1a is a front view of an optical disc drive according to an embodiment of the present application;
FIG. 1b is a first side view of an optical disc drive according to an embodiment of the present application;
FIG. 1c is a schematic diagram of a red light tracking loop according to an embodiment of the present application;
Fig. 2 is a schematic structural diagram of an OPU according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a curve of unidirectional linear motion and sinusoidal motion provided by an embodiment of the present application;
FIG. 4 is a schematic diagram of a combined motion and linear reciprocation provided by an embodiment of the present application;
FIG. 5 is a schematic diagram of a red trace according to an embodiment of the present application;
FIG. 6a is a second side view of an optical disc drive according to an embodiment of the present application;
FIG. 6b is a third side view of an optical disc drive according to an embodiment of the present application;
FIG. 6c is a fourth side view of an optical disc drive according to an embodiment of the present application;
FIG. 6d is a fifth side view of an optical disc drive according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a data processing apparatus according to an embodiment of the present application;
Fig. 8 is a flowchart illustrating a data reading or storing method according to an embodiment of the present application.
Detailed Description
The present application provides an optical disc drive and a data processing apparatus capable of reducing a movement section of an objective lens by applying a repeated sinusoidal movement to a driving motor, thereby reducing a distance variation between two light spots due to the movement of the objective lens, and thus improving reliability of data storage or reading. It is to be understood that the use of "first," "second," etc. herein is for descriptive purposes only and is not to be construed as indicating or implying any particular importance or order. In addition, for simplicity and clarity, reference numbers and/or letters are repeated throughout the several figures of the application. Repetition does not indicate a tightly defined relationship between the various embodiments and/or configurations.
The CD driver provided by the application is applied to the field of optical storage. In the blu-ray multi-layer storage scheme in the optical storage field, in order to increase the storage capacity of the optical disc, a plurality of data tracks in the data layer may share the wobble track of the wobble layer. The optical drive generates a dual beam. The red and blue spots remain at a fixed distance. The red light is focused and tracked on the wobble track of the wobble layer. Blue light is focused on the data layer. Blue tracking follows red light. But when the position of the objective lens in the optical drive changes, the distance between the two spots is affected, thereby affecting the storage or reading of data.
To this end, the application provides an optical drive. FIG. 1a is a front view of an optical disc drive according to an embodiment of the present application. FIG. 1b is a first side view of an optical disc drive according to an embodiment of the present application. As shown in fig. 1a and 1b, the optical drive comprises an optical pick-up unit (OPU) 3, a drive motor (comprising a permanent magnet 1 and a coil 2), a guide rail 4 and a spindle motor (not shown in the figures). Wherein the spindle motor is used for carrying and rotating the optical disc 7. The drive motor is also called a sled motor (sledge motor) or a first motor. The drive motor is used to drive the OPU 3 along the guide rail 4. In the example of fig. 1a, the OPU 3 and coil 2 are connected by a rigid connection 6. When the coil 2 is energized, the coil 2 moves the OPU 3 along the guide rail 4. The direction of motion of the OPU 3 is the radial direction of the optical disc (positive Y-axis direction or negative Y-axis direction in the figure). The motion trajectory of the OPU 3 is a composite motion of unidirectional rectilinear motion and sinusoidal motion. During the movement of the OPU 3 along the guide rail 4 the OPU 3 is used to read data stored on the optical disc 7 or to store data on the optical disc 7. The optical disc 7 is also called an optical disc, an optical disc or an optical disc.
In fig. 1a and 1b, the OPU 3 comprises an objective lens 5 and an OPU motor. The OPU motor is used to change the position of the objective lens 5. Specifically, the optical disc 7 includes a wobble track of the wobble layer and a data track of the data layer. The red light generated by OPU 3 is focused onto the wobble track. The blue light is focused on the data track of the data layer. Blue tracking follows red light. In theory, by the above-mentioned combined motion of the OPU 3, the red light can focus on the wobble track. However, due to the influence of the processing precision, deformation or vibration of the optical disc 7, there is still a possibility that a deviation exists between the red light spot and the wobble track. Thus, the optical drive can turn on the red light tracking loop, changing the position of the objective lens 5 in the OPU 3 by the OPU motor so that the red light can follow the wobble track. Fig. 1c is a schematic diagram of a red light tracking loop according to an embodiment of the present application. As shown in fig. 1c, the optical disc drive acquires the actual position and the target position of the red light spot in real time, and generates a driving signal according to the actual position and the target position. The OPU motor is used to adjust the position of the objective lens 5 in accordance with the drive signal. The drive motor is used to change the position of the OPU 3 in dependence on the drive signal resulting from the combined motion. The change in position of the OPU 3 changes the position of the objective lens 5, thereby affecting the position of the objective lens 5. After changing the position of the objective lens 5 by the OPU motor and the drive motor, the optical drive acquires the actual position and the target position of the red light spot again, and the above steps are circulated.
In practical applications, the size of the movement section of the objective lens 5 and the change of the distance between the two light spots are positively correlated, i.e. the larger the movement section of the objective lens 5 is, the larger the change of the distance between the two light spots is. In the embodiment of the application, by applying repeated sinusoidal movement to the driving motor, the movement interval of the objective lens 5 can be reduced, so that the distance change between two light spots caused by the movement of the objective lens 5 is reduced, and the reliability of data storage or reading is improved.
In practice, the objective lens 5 is also called a focusing lens, the objective lens 5 is used to irradiate the red light beam and the blue light beam to the optical disc 7, and the objective lens 5 can also be used to reduce or eliminate spherical aberration. The structure of the OPU is exemplarily described below. Fig. 2 is a schematic structural diagram of an OPU according to an embodiment of the present application. As shown in fig. 2, OPU 3 includes an objective lens 5, an OPU motor 201, an intermediate lens group 202, a first collimating lens 209, a first laser 210, a first detector 208, a second laser 207, a second collimating lens 206, and a second detector 211. The first laser 210 is used to generate red light (dash-dot line) and transmit the red light to the first collimating lens 209. The first collimating lens 209 is used for collimating red light, so that the red light becomes parallel light, and eliminating chromatic aberration of the red light. The first collimating lens 209 is also used to transmit red light to the objective lens 5 through the intermediate lens group 202. The objective lens 5 is used to eliminate spherical aberration in optical aberration, transmit red light to the optical disc 7, and receive a reflected light beam of the red light from the optical disc 7. The objective lens 5 is also used to transmit the reflected beam of red light through the intermediate lens group 202 to the first detector 208. The first detector 208 is configured to convert the reflected beam of red light into a first electrical signal. The first electrical signal can be used to determine the actual position of the red light impinging into the optical disc 7. Similarly, a second laser 207 is used to generate blue light (dashed line) that is transmitted to a second collimating lens 206. The second collimator lens 206 is used to transmit blue light to the objective lens 5 through the intermediate lens group 202. The objective lens 5 is used to transmit blue light to the optical disc 7. Blue light can be used for storing or reading data on the optical disc 7. When blue light is used for reading data on the optical disc 7, the objective lens 5 is also used for receiving a reflected beam of blue light from the optical disc 7, which is transmitted to the second detector 211 through the intermediate lens group 202. The second detector 211 is used to convert the reflected beam of blue light into a second electrical signal. The second electrical signal is data stored on the optical disc 7. The OPU motor 201 is configured to drive the objective lens 5 to perform linear reciprocating motion in the radial direction of the optical disc 7. The intermediate lens group 202 includes a dichroic mirror 203, a first dichroic mirror 204, and a second dichroic mirror 205. The first beam splitter 204 is used to split the red light and the reflected light beam of the red light. The second beam splitter 205 is used to split blue light and reflected beams of blue light. The dichroic mirror 203 is used to combine red light and blue light in the transmission direction of the light beam. The dichroic mirror 203 is for separating the reflected light beam of red light and the reflected light beam of blue light in the transmission direction of the reflected light beam.
As can be seen from the description of fig. 1a and 1b, the motion trajectory of the OPU 3 is a combined motion of a linear motion and a sinusoidal motion. Fig. 3 is a schematic diagram of a curve of unidirectional linear motion and sinusoidal motion provided by an embodiment of the present application. As shown in fig. 3, the abscissa represents time and the ordinate represents the distance moved. The curve 301 of the resultant motion is equal to the superposition of the curve 302 of the sinusoidal motion and the curve 303 of the unidirectional rectilinear motion. Wherein in the optical disc 7 the wobble track and the data track are spiral lines from inside to outside. Therefore, when the optical disc drive reads the data in the optical disc 7, the driving motor needs to drive the OPU 3 to perform unidirectional linear motion along the optical disc from inside to outside. In addition, the center of the wobble track and the rotation center of the optical disc 7 are not concentric, and there is an eccentric distance therebetween. Therefore, in order to make it possible for the red light to follow the wobble track, it is necessary to change the position of the OPU 3 by driving the motor so that the OPU 3 moves in the radial direction of the optical disc 7. The track of the OPU 3 forms a sine wave of one cycle per revolution of the optical disc 7. Thus, the motion profile of OPU 3 includes repeated sinusoidal motion. In general, the motion trajectory of the OPU 3 is a composite motion of unidirectional rectilinear motion and sinusoidal motion.
In the example of fig. 3, the sinusoidal motion curve 302 is a single frequency sinusoidal curve. It should be understood that the sinusoidal motion curve 302 provided in fig. 3 is but one example provided by embodiments of the present application. In practice, the repeated sinusoidal motion curve can be a multiplied sinusoidal curve. Of the multiplied sinusoids, the amplitude of the multiplied sinusoid is the largest.
As can be seen from the description of fig. 1a and 1b, in addition to the above-mentioned synthetic motion, the optical drive needs to turn on the red light tracking loop, and the position of the objective lens 5 in the OPU 3 is changed by the OPU motor so that the red light can follow the wobble track. Fig. 4 is a schematic diagram of a combined motion and linear reciprocation provided by an embodiment of the present application. Wherein the movement of the objective lens 5 by the red light tracking loop is called linear reciprocation. Both the linear reciprocating movement of the objective lens 5 and the combined movement of the OPU 3 change the position of the objective lens 5 or the red light impinging on the optical disc 7. Thus, as shown in fig. 4, the abscissa represents time and the ordinate represents distance moved. The movement curve 401 of the objective lens 5 or the red spot is equal to the superposition of the curve 301 of the combined movement and the curve 402 of the linear reciprocating movement.
In practice, the amplitude of the curve 302 depends on the deviation of the center of the wobble track from the center of rotation of the optical disc 7. The greater the deviation, the greater the magnitude of curve 302. In general, the amplitude of curve 302 can reach 100 microns. In the embodiment of the application, the movement section of the linear reciprocating movement can be reduced by applying the repeated sinusoidal movement to the driving motor. For example, the range of motion of the linear reciprocating motion is less than or equal to 10 microns.
In practical application, the driving motor is used for driving the OPU 3 to move along the guide rail 4 according to the first driving signal. As can be seen from the description of fig. 3, the resultant motion of the first drive signal can be decomposed into unidirectional rectilinear motion and sinusoidal motion. The rate of unidirectional linear motion is related to the rotational speed of the optical disc 7, the type of optical disc 7. For example, when the type of the optical disc 7 is a uniform linear velocity optical disc, the speed of the unidirectional linear motion is related to the rotational speed and the radial position of the optical disc 7. The radial position refers to the distance between the spot and the center of the optical disc 7. The sinusoidal motion can be obtained from the deviation of the center of the wobble track from the center of rotation of the optical disc 7. The present application is not limited to the manner in which the deviation is obtained. For example, the optical drive further comprises an eccentricity measuring means by which the deviation of the two is measured. In order to reduce the hardware cost of the optical drive, the optical drive is able to get deviations through the OPU 3. This is described below.
OPU 3 includes a laser (e.g., first laser 210 in fig. 2), a photodetector (e.g., first detector 208 in fig. 2). The laser is used to generate a first light beam, which is incident on the optical disc 7 through the objective lens 5. The light detector is configured to receive the first light beam reflected from the optical disc 7 through the objective lens 5 and convert the reflected first light beam into an electrical signal on the premise that the first light beam is focused stably and the red tracking is in an open loop. The electrical signal carries information about the deviation. Fig. 5 is a schematic diagram of a trace of red light according to an embodiment of the present application. As shown in fig. 5, the abscissa represents time and the ordinate represents position. On the premise that red light tracking is in an open loop, only the unidirectional linear motion of the driving motor is started, and in the process of rotating the optical disc 7 for one circle, the red light track alternately generates intersection with the data layer track and the wobble layer track. Wherein at time equal to 0 the red track and wobble layer track produce an intersection (i.e. the position of the red spot is on the wobble track). After one revolution of the optical disc 7 (at an abscissa of 0.025 in fig. 5), the red track and the wobble layer track again intersect. The position of the red spot characterizes the information about the deviation. The optical drive further comprises a processing circuit. The processing circuit is used for obtaining the track of sinusoidal motion according to the electric signals. For example, the processing circuit is configured to obtain the first repetition error RRO1 according to the following formula.
Wherein TES (k, j) comprises N x j values. RRO1 includes j values. The j values are in one-to-one correspondence with the j sectors of the optical disc. Each of the j values characterizes a location on the optical disc where the first light beam impinges. N represents the number of turns of the optical disc. The first repetition error is the relevant information of the deviation. The first repetition error corresponds to a trajectory of sinusoidal motion. The speed of the unidirectional linear motion corresponds to the track of the unidirectional linear motion. The processing circuit is used for obtaining a track of the composite motion according to the track of the sinusoidal motion and the track of the unidirectional linear motion, and obtaining a first driving signal according to the track of the composite motion. The driving motor is used for driving the OPU 3 to move along the guide rail 4 according to the first driving signal.
After the drive motor drives the OPU 3 to move along the guide rail 4 according to the first drive signal, the optical drive starts the red light tracking closed loop. At this time, the optical drive can receive the reflected light beam of the red light through the first detector and convert the reflected light beam of the red light into the first electrical signal. The optical drive is also used for obtaining the actual position of the red light spot according to the first electric signal, and obtaining a second driving signal through the actual position and the target position. The OPU motor is configured to drive the objective lens 5 to perform linear reciprocating motion along the radial direction of the optical disc 7 according to the second driving signal.
In practical application, the second driving signal carries the track information of the linear reciprocating motion. The processing circuit can be used for extracting the track of the low-frequency sinusoidal motion from the track information of the linear reciprocating motion, and superposing the track of the low-frequency sinusoidal motion and the track of the sinusoidal motion obtained according to the electric signal to obtain a new track of the sinusoidal motion. For example, after one revolution of the optical disc 7 under a red tracking loop, the processing circuit is arranged to collect the second drive signal during this revolution. The processing circuit is used for converting the second driving signal into TES (k, j). The processing circuit is used for carrying out Fourier transformation on the TES (k, j) to obtain an electric signal in a frequency domain. The processing circuit is used for extracting low-frequency electric signals from the electric signals in the frequency domain. The processing circuit is also used for performing inverse Fourier transform on the low-frequency electric signal to obtain a second repetition error. The processing circuit is used for superposing the second repetition error and the first repetition error to obtain a third repetition error. The third repetition error corresponds to the new trajectory of sinusoidal motion. The processing circuit is used for obtaining a track of the composite motion according to the new track of the sinusoidal motion and the track of the unidirectional linear motion, and obtaining a third driving signal according to the track of the composite motion. The driving motor is used for driving the OPU 3 to move along the guide rail 4 according to the third driving signal.
In an embodiment of the application, the drive motor comprises a stator and a mover. The mover and OPU 3 are fixed. The stator and the guide rail are relatively fixed in position. The drive motor is used for driving the mover and the OPU 3 to move along the guide rail 4. In the example of fig. 1a and 1b, the stator is a permanent magnet and the mover is a coil. In practical applications, the drive motor can be arranged in reverse. At this time, the stator is a coil, and the mover is a coil permanent magnet.
In the example of fig. 1a and 1b, the number of pairs of stators is 2 in order to improve the stability of the OPU 3 during the synthetic motion. Specifically, the drive motor includes two pairs of stators, each pair of stators including an N-pole permanent magnet and an S-pole permanent magnet. The stator and the guide rail 4 are arranged in parallel. It should be appreciated that in practical applications, one skilled in the art may increase or decrease the number of stators as desired.
In the example of fig. 1b, OPU 3 is inside coil 2. In practical applications OPU 3 can also be outside coil 2. When OPU 3 is external to coil 2, coil 2 comprises a two-part coil. The two part coils may be connected in parallel or in series. FIG. 6a is a second side view of an optical disc drive according to an embodiment of the present application. As shown in fig. 6a, coil 2 includes coil 601 and coil 602. Coil 601 and coil 602 are connected in series. Each of the two coils surrounds a respective one of the S-pole permanent magnets. The outer ring of the coil 602 is connected to the inner ring of the coil 601. FIG. 6b is a third side view of an optical disc drive according to an embodiment of the present application. As shown in fig. 6b, coil 2 includes coil 601 and coil 602. Coil 601 and coil 602 are connected in series. The coil 601 surrounds an S-pole permanent magnet. Coil 602 surrounds an N-pole permanent magnet. The outer ring of the coil 602 is connected to the outer ring of the coil 601. FIG. 6c is a fourth side view of an optical disc drive according to an embodiment of the present application. As shown in fig. 6c, coil 2 includes coil 601 and coil 602. Coil 601 and coil 602 are connected in parallel. Each of the two coils surrounds a respective one of the S-pole permanent magnets. The outer ring of the coil 602 is connected in parallel with the inner ring of the coil 601. FIG. 6d is a fifth side view of an optical disc drive according to an embodiment of the present application. As shown in fig. 6d, coil 2 includes coil 601 and coil 602. Coil 601 and coil 602 are connected in parallel. The coil 601 surrounds an S-pole permanent magnet. Coil 602 surrounds an N-pole permanent magnet. The outer ring of the coil 602 and the outer ring of the coil 601 are connected in parallel.
The optical drive provided by the present application is described above, and the data processing apparatus and the data reading or storing method provided by the present application are described below. Fig. 7 is a schematic structural diagram of a data processing device according to an embodiment of the present application. As shown in fig. 7, the data processing device 700 comprises a processor 702 and an optical drive 701. The processor 702 may be a central processor (central processing unit, CPU), a network processor (network processor, NP) or a combination of CPU and NP. The processor 702 may further comprise a hardware chip or other general purpose processor. The hardware chip may be an Application SPECIFIC INTEGRATED Circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The processor 702 is used for transmitting data to the optical drive 701 and/or for receiving data from the optical drive 701. The optical drive 701 is used to read data from and/or store data on an optical disc. When the processor 702 is used to transfer data to the optical drive 701, the optical drive 701 is used to store data on an optical disc. When the processor 702 is configured to receive data from the optical drive, the optical drive 701 is configured to read data stored on an optical disc. It should be appreciated that reference can be made to the description of any of the preceding figures 1a to 6d in relation to the description of the optical drive 701.
In other embodiments, data processing device 700 may also include memory. The memory may be volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The nonvolatile memory may be a read-only memory (ROM), a Programmable ROM (PROM), an erasable programmable ROM (erasable PROM, EPROM), or a flash memory. The volatile memory may be random access memory (random access memory, RAM). The memory is used for storing data received from the optical drive 701 and/or the memory is used for storing data transferred to the optical drive 701.
Fig. 8 is a flowchart illustrating a data reading or storing method according to an embodiment of the present application. The data reading or storing method can be applied to a data processing device or an optical drive. The data reading or storing method will be described below taking an example in which the data reading or storing method is applied to a data processing apparatus. As shown in fig. 8, the data reading or storing method includes the following steps.
In step 801, the data processing apparatus rotates an optical disc.
The data processing device carries and rotates the optical disc through the spindle motor. Optical discs are also known as optical discs, optical discs or optical discs. The data processing device can rotate the optical disc in a mode of uniform linear speed, uniform angle or partitioned uniform linear speed and the like.
In step 802, the data processing apparatus drives the OPU to move along the guide rail by using the driving motor to read data stored on the optical disc or store data on the optical disc, where a motion track of the OPU is a composite motion of unidirectional linear motion and sinusoidal motion.
The data reading or storing method further comprises the step of the data processing device generating red light and blue light. The red light is focused and tracked on the wobble track of the wobble layer. The red and blue spots remain at a fixed distance. Blue tracking follows red light. The data processing device drives the objective lens in the OPU to carry out linear reciprocating motion along the radial direction of the optical disc through the OPU motor so as to enable red light to track on the swing track. When the position of the objective lens is changed, the distance between the red light spot and the blue light spot is changed. The size of the movement section of the objective lens and the change of the distance between the two light spots are positively correlated, namely, the larger the movement section of the objective lens is, the larger the change of the distance between the two light spots is. In the embodiment of the application, the repeated sinusoidal motion is applied to the driving motor, so that the motion interval of the objective lens can be reduced, the distance change between two light spots caused by the motion of the objective lens is reduced, and the reliability of data storage or reading is improved.
It should be appreciated that the description of the data reading or storage method is similar to that of the optical drive described in any of the preceding figures 1a to 6 d. Thus, for a description of the data reading or storing method in fig. 8, reference can be made to the description of the optical drive in any of the preceding figures 1a to 6 d. For example, the range of motion of the linear reciprocating motion is less than or equal to 10 microns. For another example, the data processing device receives the first light beam reflected from the optical disc, converts the reflected first light beam into an electrical signal, and obtains the first driving signal according to the electrical signal. The data processing device drives the drive motor via the first drive signal to move the drive motor with the OPU along the rail.
The foregoing is merely illustrative embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present application, and the application should be covered.
Claims (12)
1. An optical drive comprising an optical pickup unit OPU, a drive motor, a guide rail and a spindle motor, wherein:
the spindle motor is used for bearing and rotating the optical disc;
The driving motor is used for driving the OPU to move along the guide rail so as to read data stored on the optical disk or store data on the optical disk, and the motion track of the OPU is a composite motion of unidirectional linear motion and sinusoidal motion.
2. The optical drive of claim 1, wherein the OPU includes an OPU motor and an objective lens;
The OPU motor is used for driving the objective lens to carry out linear reciprocating motion along the radial direction of the optical disc, and the motion interval of the linear reciprocating motion is smaller than or equal to 10 microns.
3. The optical drive of claim 2, further comprising processing circuitry, the OPU further comprising a laser and a photodetector;
the laser is used for generating a first light beam, and the first light beam is incident to the optical disc through the objective lens;
the optical detector is used for receiving the first light beam reflected from the optical disc through the objective lens and converting the reflected first light beam into an electric signal;
the processing circuit is used for obtaining a first driving signal according to the electric signal;
the driving motor is used for driving the OPU to move along the guide rail and comprises the driving motor used for driving the OPU to move along the guide rail according to the first driving signal.
4. The optical drive of claim 3, wherein,
The OPU motor is used for driving the objective lens to perform linear reciprocating motion along the radial direction of the optical disc and comprises the OPU motor and a driving unit, wherein the OPU motor is used for driving the objective lens to perform linear reciprocating motion along the radial direction of the optical disc according to a second driving signal;
the processing circuit is further used for obtaining a third driving signal according to the second driving signal and the electric signal;
The driving motor is also used for driving the OPU to move along the guide rail according to the third driving signal.
5. The optical disc drive according to any one of claims 1 to 4, wherein the drive motor comprises a stator and a mover, the mover being fixed to the OPU, the stator and the guide rail being relatively fixed in position;
The driving motor is used for driving the OPU to move along the guide rail and comprises the driving motor which is used for driving the mover and the OPU to move along the guide rail.
6. The optical disc drive of claim 5 wherein the stator is a permanent magnet and the mover is a coil.
7. The optical drive of claim 6 wherein the number of pairs of stators is 2, the stators and the guide rail being arranged in parallel.
8. A data processing apparatus comprising a processor and an optical drive as claimed in any one of claims 1 to 7, the processor being arranged to transmit data to and/or receive data from the optical drive.
9. A method of reading or storing data, comprising:
Rotating the optical disc;
the optical reading unit OPU is driven by the driving motor to move along the guide rail so as to read the data stored on the optical disc or store the data on the optical disc, and the motion track of the OPU is the composite motion of unidirectional linear motion and sinusoidal motion.
10. The data reading or storing method according to claim 9, wherein the method further comprises:
And driving an objective lens in the OPU to perform linear reciprocating motion along the radial direction of the optical disc by using an OPU motor, wherein the motion interval of the linear reciprocating motion is less than or equal to 10 microns.
11. The data reading or storing method according to claim 10, wherein the method further comprises:
generating a first light beam, and making the first light beam enter the optical disc through the objective lens;
receiving the first light beam reflected from the optical disc, and converting the reflected first light beam into an electrical signal;
obtaining a first driving signal according to the electric signal;
Driving the optical pickup unit OPU along the guide rail by the drive motor includes driving the drive motor by the first drive signal to move the drive motor with the OPU along the guide rail.
12. The method for reading or storing data according to claim 11, wherein,
The step of driving the objective lens in the OPU to perform linear reciprocating motion along the radial direction of the optical disc by the OPU motor comprises the steps of driving the OPU motor by a second driving signal so that the OPU motor drives the objective lens in the OPU to perform linear reciprocating motion along the radial direction of the optical disc;
The method further comprises the steps of:
Obtaining a third driving signal according to the second driving signal and the electric signal;
and driving the driving motor through the third driving signal so that the driving motor drives the OPU to move along the guide rail.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310959962.9A CN119446199A (en) | 2023-07-31 | 2023-07-31 | Optical drives and data processing equipment |
| PCT/CN2024/107469 WO2025026172A1 (en) | 2023-07-31 | 2024-07-25 | Optical disc drive and data processing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310959962.9A CN119446199A (en) | 2023-07-31 | 2023-07-31 | Optical drives and data processing equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN119446199A true CN119446199A (en) | 2025-02-14 |
Family
ID=94394088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310959962.9A Pending CN119446199A (en) | 2023-07-31 | 2023-07-31 | Optical drives and data processing equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN119446199A (en) |
| WO (1) | WO2025026172A1 (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006048923A (en) * | 2000-10-30 | 2006-02-16 | Yamaha Corp | Optical disk device |
| US20080043579A1 (en) * | 2004-06-01 | 2008-02-21 | Matsushita Electronic Industrial Co., Ltd. | Optical Disk Device |
| CN101246713A (en) * | 2007-02-16 | 2008-08-20 | 三星电子株式会社 | Optical pickup and disc device having same |
| JP2008276865A (en) * | 2007-04-27 | 2008-11-13 | Yamaha Corp | Image reader |
| CN113270119A (en) * | 2021-06-15 | 2021-08-17 | 谭小地 | Holographic optical disk track changing method and track changing device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007305248A (en) * | 2006-05-12 | 2007-11-22 | Konica Minolta Opto Inc | Optical disk device |
| US8059509B2 (en) * | 2008-12-19 | 2011-11-15 | Lite-On It Corporation | Optical disk drive and method for use with an optical disk drive for determining the disk characteristic |
| CN115719597B (en) * | 2021-08-26 | 2025-08-12 | 华为技术有限公司 | Optical head torquer, optical head, optical read-write system and data read-write method |
-
2023
- 2023-07-31 CN CN202310959962.9A patent/CN119446199A/en active Pending
-
2024
- 2024-07-25 WO PCT/CN2024/107469 patent/WO2025026172A1/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006048923A (en) * | 2000-10-30 | 2006-02-16 | Yamaha Corp | Optical disk device |
| US20080043579A1 (en) * | 2004-06-01 | 2008-02-21 | Matsushita Electronic Industrial Co., Ltd. | Optical Disk Device |
| CN101246713A (en) * | 2007-02-16 | 2008-08-20 | 三星电子株式会社 | Optical pickup and disc device having same |
| JP2008276865A (en) * | 2007-04-27 | 2008-11-13 | Yamaha Corp | Image reader |
| CN113270119A (en) * | 2021-06-15 | 2021-08-17 | 谭小地 | Holographic optical disk track changing method and track changing device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2025026172A1 (en) | 2025-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR880000999B1 (en) | Optical information storage | |
| JPS5891536A (en) | Digital optical disk access method | |
| CN119446199A (en) | Optical drives and data processing equipment | |
| US5999507A (en) | Objective lens driving apparatus | |
| JP2002324328A (en) | Information reproducing device and optical recording medium | |
| JPH1031831A (en) | Device for correcting radial and vertical direction runout of optical disk | |
| US20090010123A1 (en) | Data recording/reproduction method and data recording/reproduction apparatus | |
| JPS6349285B2 (en) | ||
| CN100487384C (en) | Optical head tri-dimensional torquer inclined movement characteristic curve test method | |
| TW561455B (en) | Low-inertia compact disk driving device | |
| CN1647168A (en) | optical pickup | |
| KR100408219B1 (en) | Radial Tilt Detector | |
| CN1739149A (en) | Optical pickup device and optical disk device | |
| US20080025162A1 (en) | Optical disk apparatus and pickup positioning method | |
| JP2008269662A (en) | Optical disk device | |
| KR910006665B1 (en) | Target Track Access Device of Optical Information Storage System | |
| JP2005520272A (en) | Method and apparatus for reading information from a three-dimensional storage medium | |
| CN1732518A (en) | disc player | |
| CN1294572C (en) | CD device | |
| JP2001325735A (en) | Tracking control device | |
| JPH1125473A (en) | Optical disk device and optical axis correction method | |
| JPH0675298B2 (en) | Optical information reproducing device | |
| JPH0935290A (en) | Optical pickup device and adjusting method thereof | |
| JP2001325737A (en) | Tracking control device | |
| JPH06243498A (en) | Optical disc device, inspection device thereof, and inspection method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |