JPH04181574A - Optical recording/reproduction device - Google Patents

Abstract

PURPOSE:To enable an optical head to be set to a terminal position in a short time by issuing a command signal for moving terminal position for a drive force control drive of an optical head traveling device and then controlling drive force of the optical head to be generated by the drive device until setting. CONSTITUTION:An optical head traveling device 2 drives a straight line shaped traveling path 1 with a drive force with is generated by a drive device 3. The device 3 generates the drive force with a drive control signal 101 of a drive force control device 5. The device 5 receives a terminal position traveling command signal 102 from a drive signal generation device 6 and then generates the signal 101. At this time, after the device 2 is pressed against a terminal buffer device 4, the device 6 controls the signal 102 so that an optimum drive force to be set is reached in a short time, thus enabling time until the optical head is set to a final setting position to be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to movement control of an optical recording/reproducing apparatus, particularly an optical recording/reproducing head.

[Prior Art] In a conventional optical recording/reproducing device, when an optical recording/reproducing head (hereinafter referred to as an optical head) is moved to the end position of the moving path, the desired end position is moved with a constant force. The optical head moves in the direction of , presses it against the buffer device at the end, maintains the driving force generated by the moving device at the same moving force as when moving, and controls the optical head so that the position of the optical head becomes static at the end after a certain period of time. Ta.

[Problems to be Solved by the Invention] As mentioned above, when moving the optical head to the terminal end, after moving it with a constant force and pressing it against the terminal buffer device,
The driving force generated by the moving device is maintained at the same moving force as when moving,
The method of waiting for the position of the optical head to stabilize at the terminal end has a problem in that it takes a long time to stabilize.

[Means for Solving the Problems] An optical recording and reproducing apparatus according to the present invention includes: (a) an optical recording and reproducing apparatus that records and reproduces information on a recording medium using an optical head using a semiconductor laser or the like as a light source; (b) an optical head moving device having a linear moving path; (c) a spring buffer provided at the end of the linear moving path; and (d) a driving force of the optical head moving device. (e) a drive force control device that controls the drive force generated by the drive device; (f) a drive signal generation device that issues a command signal for end position movement to the drive force control device. It is characterized by more than that.

[Operation] Since the present invention has the above-described configuration, a command signal for moving the end position is issued to the driving force control device, and the optical head driving force generated by the driving device is controlled until the optical head is stabilized. I can do it. Therefore, it is possible to generate a driving force that allows static determination in the shortest possible time.

[Example] Hereinafter, the present invention will be described in detail based on the drawings. 1st
The figure is a basic operational block diagram of the optical recording/reproducing apparatus of the present invention. FIG. 2 shows an example of a basic operation of a signal generated by the drive signal generating device according to the present invention over time. Also, the fourth
The figure shows an example of the device configuration of the present invention, and FIG.
1 is an example of a temporal change in a signal generated by a drive signal generating device according to the present invention. Components having the same content in FIG. 1 and FIG. 4 are designated by the same numbers. First, the basic operation will be explained. The optical head moving device 2, which is movable while being guided by a linear movement path 1, moves along the linear movement path 1 by a driving force generated by a drive device 13. The drive device 3 generates a drive force based on the drive control signal 101 of the drive force control device f5. The driving force control device 5 generates a drive control signal 101 according to a drive command signal 102 generated by a drive signal generating device 6. The drive command signal 102 causes the optical head moving device 2 to
The drive signal generator 6 controls the drive signal generator 6 so that the pattern of the optimum drive command signal 103 becomes static in the shortest possible time after being pressed against the drive signal.

The above will be explained based on examples. The optical head moves while being supported by a linear bearing device 2, which is an optical head moving device, and a linear bearing guide 1, which is a linear movement path. The head moving device driving force is generated by the driving force generated by the linear motor coil 51 and the linear motor field device 52, which are driving devices. The magnitude of the driving force is controlled by a driver 61, which is a driving force control device, according to commands from a CPU device 650, which is a drive signal generating device. The drive command signal sequentially converts the contents stored in the command signal pattern ROM 82, which is an element constituting the CPU device 65, by the action of the command signal transfer device 63.
It is generated by transferring the OM digital signal to a D/A converter 64 which converts it into a continuous signal. Here, the command signal transfer device 63 has a function of managing a certain time, and reads the control command content data from the command signal pattern ROM 62 and transfers it to the D/A converter 64 as time passes. Operate.

[Effects of the Invention] FIG. 6 shows the time transition of the amount of movement of the optical head when controlling the movement to the end position using the conventional method shown in FIG. 3. FIG. 7 shows a time transition of the amount of movement of the optical head when the movement to the end position is controlled by the end position movement command control signal shown in FIG. 5 according to the present invention. As can be seen by comparing FIG. 6 and FIG. 7, it can be seen that the time required for settling to the final static position is significantly shortened in FIG.

As described above, with the control according to the present invention, the time until stabilization is shortened.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of the configuration of the optical recording/reproducing apparatus of the present invention, and FIG. 2 is a diagram of basic drive command signals over time. FIG. 3 is a diagram showing changes in drive command signals over time according to a conventional method. FIG. 4 is a diagram showing one embodiment of the optical recording/reproducing apparatus according to the present invention, and FIG. 5 is a diagram showing one embodiment of the temporal change of the drive command signal. FIG. 6 is a time transition diagram of positional changes in the linear movement path of the optical head until static determination according to the conventional method, and FIG. FIG. 3 is a time transition diagram of changes in position on a linear movement path of FIG. ,, linear movement path 2, optical head moving device 3, drive device 4, end shock absorber 5, drive force control device 6, drive signal generator 103, drive command signal pattern and above Applicant Seiko Epson Corporation Agent Patent attorney Haki Kisanbe et al. Figure 1 Figure 2 Figure 3 500m5ec 1.2sec Time M6 Figure 7

Claims (1)

[Claims] (1) (a) In an optical recording and reproducing device that records and reproduces information on a recording medium using an optical head that uses a semiconductor laser or the like as a light source, (b) an optical head moving device that has a linear movement path. (c) a spring buffer provided at the end of the linear movement path; (d) a drive device that generates a driving force for the optical head moving device; and (e) a drive generated by the drive device. An optical recording/reproducing device comprising: a driving force control device that controls force; and (f) a drive signal generating device that issues a command signal for moving the end position to the driving force control device.