JP2004110958A - Optical card drive device and its control method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a card medium from fallin down through an opening part for optical pickup when a tray is opened, in a disk drive device having loading tray mechanism. <P>SOLUTION: Before a tray on which an optical card D is placed is opened, a control section 10 performs focus control of an optical pickup 3 at the prescribed position, it is discriminated whether there is possibility that the optical card D falles through an opening part or not based on whether focus is adjusted or not, when focus is adjusted, the control section 10 discriminates that there is possibility that the optical card D may falles down through the opening part, the optical card D is rotated by a drive section 1, a position of the optical card D is changed, when focus is not adjusted, the control section 10 judges that there is not possibility that the optical card D may falles through the opening part, the optical card D is carried by the tray. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to, for example, an optical card drive provided with a tray-type loading mechanism and a control method thereof.
[0002]
[Prior art]
A slot-in system, a tray system, a caddy system, and the like have been proposed as a loading system for the disk drive device. At present, the tray system is common.
[0003]
FIG. 8 shows an external view of a disk drive device having a tray-type loading mechanism. This disk drive device is configured so that a tray can be loaded / unloaded horizontally. In this disk drive device, it is mainly assumed that a circular optical disk is reproduced, but it is also possible to reproduce a card-type medium. A card-type medium refers to a non-circular optical recording medium such as a rectangle.
[0004]
[Problems to be solved by the invention]
However, in a disk drive device having a tray-type loading mechanism, when a card-type medium is carried out of the device by the tray, the card-type medium drops through an opening formed in the tray and in which an optical pickup is disposed. Sometimes.
[0005]
For example, as shown in FIG. 9, when the tray is unloaded in a state where the short side of the rectangular card-shaped medium is located on the opening, the card is inserted into the opening for the optical pickup formed in the tray. Mold media may fall.
[0006]
When the card-type medium falls into the opening for the optical pickup as described above, not only the opening and closing of the tray becomes impossible, but also the mechanism inside the disk drive may be damaged. Therefore, the user must bring the disk drive to a service base and request repair of the disk drive.
[0007]
Further, in the case of a personal computer equipped with a tray-type disk drive device, if a card-type medium falls into an opening for an optical pickup, the personal computer body must be taken to a service base. This was very troublesome for the user.
[0008]
Therefore, an object of the present invention is to prevent a card-type medium from dropping into an opening for an optical pickup when a card-type medium is carried out of the apparatus by a tray in a disk drive device having a tray-type loading mechanism. An optical card drive device and a control method therefor are provided.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a first invention of the present application is directed to a tray for carrying an optical card into and out of an apparatus.
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
Optical pickup, driving means, and control means for controlling the operation of the tray,
In an optical card drive device wherein the tray has an opening for an optical pickup,
The control means performs focus control of the optical pickup at a predetermined position before unloading the optical card whose rotation has been stopped from the inside of the apparatus,
When the optical card is focused, it is determined that the optical card may fall from the opening when the optical card is taken out of the apparatus, and the optical card on the tray is temporarily rotated by rotating the optical card temporarily. Change the position of
If the optical card is not focused, it is determined that there is no possibility that the optical card will fall from the opening when the optical card is carried out of the apparatus, and the optical card is carried out of the apparatus by a tray. It is an optical card drive device.
[0010]
A second invention of the present application relates to a tray for carrying an optical card into the apparatus and carrying out an optical card from the apparatus,
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
Optical pickup, driving means, and control means for controlling the operation of the tray,
In a method for controlling an optical card drive device in which a tray has an opening for an optical pickup,
Performing a focus control of the optical pickup at a predetermined position before unloading the optical card whose rotation has stopped from the device;
When the optical card is focused, it is determined that the optical card may fall from the opening when the optical card is taken out of the apparatus, and the optical card on the tray is temporarily rotated by rotating the optical card temporarily. Change the position of
When the optical card is out of focus, it is determined that there is no possibility that the optical card falls from the opening when the optical card is taken out of the apparatus, and the optical card is taken out of the apparatus by a tray. A method of controlling an optical card drive device characterized by the following.
[0011]
As described above, according to the present invention, the focus control of the optical pickup is performed at a predetermined position before the optical card whose rotation has been stopped is carried out of the apparatus. When it is determined that the optical card may fall out of the opening when the optical card is taken out of the apparatus, the position of the optical card on the tray is changed by rotating the optical card by the driving means, and the focus is not achieved. When the optical card is taken out of the device by the tray, it is judged that there is no possibility that the optical card falls from the opening. It is possible to avoid unloading the tray when there is a possibility of falling. Therefore, it is possible to prevent the optical card from dropping from the opening for the optical pickup when the optical card is carried out of the apparatus by the tray.
[0012]
A third invention of the present application provides a tray for loading an optical card into the device and unloading the optical card from the device,
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
Optical pickup, driving means, and control means for controlling the operation of the tray,
In an optical card drive device wherein the tray has an opening for an optical pickup,
The control means, before unloading the optical card stopped by the drive means from the apparatus, irradiates the laser light by the optical pickup at a predetermined position, and determines whether or not the reflected light for the laser light is received,
If the reflected light is received, it is determined that the optical card may fall out of the opening when the optical card is carried out of the device, and the optical card is temporarily rotated, so that the light on the tray is Change the position of the card,
If it is determined that the reflected light has not been received, it is determined that there is no possibility that the optical card will fall from the opening when the optical card is taken out of the device, and the optical card is taken out of the device. An optical card drive device.
[0013]
A fourth invention of the present application provides a tray for carrying an optical card into the apparatus and carrying out the optical card from the apparatus,
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
Optical pickup, driving means, and control means for controlling the operation of the tray,
In a method for controlling an optical card drive device in which a tray has an opening for an optical pickup,
Before unloading the optical card stopped by the driving means from the apparatus, irradiating a laser beam by an optical pickup at a predetermined position, and determining whether or not reflected light for the laser beam has been received,
If the reflected light is received, it is determined that the optical card may fall out of the opening when the optical card is carried out of the device, and the optical card is temporarily rotated, so that the light on the tray is Change the position of the card,
If it is determined that the reflected light has not been received, it is determined that there is no possibility that the optical card will fall from the opening when the optical card is carried out of the apparatus, and the step of carrying out the optical card from the apparatus. A method for controlling an optical card drive device, comprising the steps of:
[0014]
As described above, according to the present invention, before unloading the optical card whose rotation has been stopped from the inside of the apparatus, it is determined whether or not the optical pickup irradiates laser light at a predetermined position and receives reflected light with respect to the laser light. When it is determined that the reflected light has been received, it is determined that the optical card may fall from the opening when the optical card is carried out of the apparatus, and the driving means temporarily stops the optical card. If the optical card is rotated and the position of the optical card on the tray is changed, and it is determined that the reflected light has not been received, the optical card may fall out of the opening when the optical card is carried out of the apparatus. It is possible to avoid unloading the tray in a state where there is a possibility that the optical card is likely to fall from the opening in order to determine that there is no optical card and to take the optical card out of the apparatus. Therefore, it is possible to prevent the optical card from dropping from the opening for the optical pickup when the optical card is carried out of the apparatus by the tray.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an example of a configuration of a disk drive device according to an embodiment of the present invention. As shown in FIG. 1, this disk drive device includes a spindle motor 1, a turntable 2, an optical pickup 3, a thread mechanism 4, an RF amplifier 5, a binarization circuit 6, a data demodulation circuit 7, a buffer memory 8, an interface circuit 9, a system controller 10, a servo control circuit 11, a data modulation circuit 12, a thread control circuit 13, a laser drive circuit 14, a spindle control circuit 15, and a two-axis control circuit 16. Here, the disk drive device is, for example, a CD-R (Compact Disc Recordable) drive or a CD-RW (Compact Disc Rewritable) drive. The card type medium D is a rectangular optical card, for example, writable or read-only.
[0016]
FIG. 2A is a plan view showing an example of the card type medium D. FIG. 2B is a cross-sectional view illustrating an example of a card-type medium. A center hole 31 is formed in the center of the card type medium D. A rib-shaped protrusion 32 for placing the card-shaped medium D at a predetermined position on the tray is provided on the surface on the side where the laser light is irradiated.
[0017]
FIG. 3A is a front view showing another example of the card type medium D. FIG. 3B is a cross-sectional view illustrating another example of the card-type medium. A center hole 31 is formed in the center of the card type medium D. On the surface on the side where the laser beam is irradiated, a projection 33 is provided which is raised substantially uniformly in a substantially circular shape with the center hole 31 as the center. The protrusion 33 is used to place the card type medium D at a predetermined position on the tray.
[0018]
The spindle motor 1 rotationally drives an optical card such as a card type medium D mounted on a turntable 2 at a constant linear velocity (CLV) or a constant angular velocity (CAV) at a constant angular velocity.
[0019]
The optical pickup 3 irradiates the signal surface of an optical card such as the card type medium D with a laser beam, and traces a track formed concentrically or spirally on the signal surface. The optical pickup 3 includes a semiconductor laser 21 for irradiating an optical card such as a card type medium D with a laser beam, an objective lens 22 for condensing a laser beam emitted from the semiconductor laser 21, and a light source for a card type medium. A photodetector 23 that receives the laser light reflected by the card and supplies an electric signal corresponding to the received laser light to the RF amplifier 5 and a two-axis mechanism 24 for moving the objective lens 22 in the focus direction and the tracking direction. And so on.
[0020]
The sled mechanism 4 is a mechanism for moving the entire optical pickup 3 in a predetermined direction. The RF amplifier 5 includes a current-voltage conversion circuit, an amplification circuit, a matrix circuit (RF matrix amplifier), and the like, generates a necessary signal based on a signal from the photodetector 23, and supplies the generated signal to the binarization circuit 6. The RF amplifier 5 generates, for example, an RF signal as reproduction data, a push-pull signal for servo control, a focus error signal, a tracking error signal, and the like.
[0021]
The binarization circuit 6 binarizes the RF signal supplied from the RF amplifier 5, converts the RF signal into a digital signal sequence, and supplies the digital signal sequence to the data demodulation circuit 7. The data demodulation circuit 7 supplies the digital signal sequence supplied from the binarization circuit 6 to the buffer memory 8 after demodulation and error correction according to a predetermined method.
[0022]
The buffer memory 8 accumulates the signal supplied from the data demodulation circuit 7 and appropriately supplies the accumulated signal to an external device (not shown) (not shown) via the interface circuit 9.
[0023]
The system controller 10 controls the interface circuit 9, the servo control circuit 11, the data modulation circuit 12, and the like. The system controller controls the loading / unloading operation of the tray and the like.
[0024]
The servo control circuit 11 generates various focus, tracking, thread, and spindle servo drive signals based on a focus error signal and a tracking error signal from the RF amplifier 5 and an operation command from the system controller 10, and generates a two-axis control circuit. 16, output to the thread control circuit 13 and the spindle control circuit 15.
[0025]
The data modulation circuit 12 applies an error correction code and encodes a signal supplied from an external device (not shown) via the interface circuit 9 to the laser drive circuit 14 according to a predetermined method. I do.
[0026]
The laser drive circuit 14 drives the semiconductor laser 21 based on a signal supplied from the data modulation circuit 12. The thread control circuit 13 controls the thread mechanism 4 based on the servo drive signal supplied from the servo control circuit 11.
[0027]
The spindle control circuit 15 controls the spindle motor 1 based on a servo drive signal supplied from the servo control circuit 11. The two-axis control circuit 16 controls the two-axis mechanism 24 provided in the optical pickup 3 based on a servo drive signal supplied from the servo control circuit 11.
[0028]
FIG. 4 is a top view showing an example of a tray provided in the disk drive device according to the embodiment of the present invention. The tray 41 has an opening 42 for the optical pickup 3. Also, on the surface of the tray 41 on which the optical disk is placed, a disk guide portion 43 for placing an optical disk having a diameter of 120 mm at a predetermined position on the tray 41 and an optical disk having a diameter of 80 mm at a predetermined position on the tray are provided. A disk guide section 44 for placing the card type medium D and a disk guide section 45 for placing the card type medium D at a predetermined position on the tray are formed.
[0029]
FIG. 5 shows an example of the state of the card-type medium D immediately before unloading the tray 41. Immediately before unloading the tray 41, the card type medium D is placed on the tray 41 in a stationary state.
[0030]
Depending on the rest position, the card-shaped medium D may fall from the opening 42 for the optical pickup 3 when the card-shaped medium D is carried out of the apparatus by the tray 41. The position where there is a possibility of the drop is defined by the width d of the opening 42, the width (length of the short side) of the card-shaped medium D, the stationary position of the card-shaped medium D when unloading the tray 41, and the like. be able to.
[0031]
FIG. 6 is a view for explaining an example of a position where the card-type medium D may fall from the opening 42 for the optical pickup 3 when the card-type medium D is carried out of the apparatus by the tray 41. . When the card type medium D is stationary at a position rotated from the position defined by the disk guide portion 45 of the tray 41 counterclockwise about the center hole 31 by about 40 ° to 140 °, the card type medium D May fall from the opening 42 for the optical pickup 3. Here, the width (length of the short side) of the card type medium D is 58 mm, and the width d of the opening is 60 mm. Note that these numerical values are merely examples, and are numerical values that greatly change depending on the ejection speed of the tray 41, and it is necessary to consider the irradiation position of a laser beam, which will be described later.
[0032]
L indicates the irradiation position of the laser beam. The irradiation position L is, for example, a position of 37.5 mm from the center of the card type medium D in the loading direction. By controlling the focus of the optical pickup 3 at the irradiation position L, it is possible to determine whether or not the card-type medium D may fall from the opening 42. For example, by controlling the focus of the optical pickup 3 at a position of 37.5 mm, the optical pickup 3 is rotated counterclockwise about 40 ° to 140 ° about the center hole 31 from the position defined by the disk guide portion 45 of the tray 41. It can be determined whether or not the card-type medium D is located at the position where the user has performed.
[0033]
FIG. 7 is a flowchart for explaining the operation of the disk drive device when the tray 41 is unloaded. The operation shown in this flowchart is realized by, for example, software installed in the computer connected to the system controller 10 or the disk drive device in FIG.
[0034]
First, in step S1, the system controller 10 stops the rotation of the card type medium D. Then, in step S2, the system controller 10 moves the optical pickup 3 to a predetermined position and irradiates a laser beam.
[0035]
Next, in step S3, the system controller 10 controls the focus of the optical pickup 3. Then, in step S4, the system controller 10 determines whether or not focus has been achieved. If the focus is achieved, there is a possibility that the card type medium D will fall from the opening 42, so the process proceeds to step S6. On the other hand, if the focus is not achieved, there is no possibility that the card-type medium D will fall from the opening 42, so the process proceeds to step S5.
[0036]
In step S5, the system controller 10 stops the focus control of the optical pickup 3, and then unloads the tray 41. As a result, the card type medium D is carried out of the disk drive.
[0037]
In step S6, the system controller 10 stops the focus control of the optical pickup 3. Then, in step S7, the system controller 10 temporarily rotates the card type medium D and changes the position of the card type medium D on the tray 41, and then returns the processing to step S1.
[0038]
According to the embodiment of the present invention, the following effects can be obtained.
Before the card type medium D is carried out of the apparatus by the tray 41, the system controller 10 controls the focus of the optical pickup 3 at a predetermined position. When the card is in focus, the card-type medium D may fall out of the opening 42 when the card-type medium D is carried out of the apparatus by the tray 41. The position of the card type medium D on the tray 41 is changed by rotating the type medium D.
[0039]
On the other hand, when the card 41 is out of focus, there is no possibility that the card-shaped medium D will fall out of the opening 42 when the card-shaped medium D is carried out of the apparatus by the tray 41. To carry out the card type medium D from inside the apparatus. Thus, it is possible to avoid unloading the tray 41 in a state where the card type medium D may fall from the opening 42. Therefore, it is possible to prevent the card-type medium D from dropping into the opening 42 for the optical pickup 3 when the card-type medium D is carried out from the disk drive device.
[0040]
Further, when the card-shaped medium D is carried out of the apparatus by the tray 41, the process of determining whether or not the card-shaped medium D may fall from the opening 42 can be realized only by changing the software. it can. Therefore, it is possible to prevent the card-type medium D from dropping from the opening 42 when the card-type medium D is carried out of the apparatus by the tray 41 without increasing the cost of the disk drive device.
[0041]
As described above, one embodiment of the present invention has been specifically described. However, the present invention is not limited to the above-described embodiment, and various modifications based on the technical idea of the present invention are possible.
[0042]
For example, the numerical values given in the above-described embodiment are merely examples, and different numerical values may be used as needed.
[0043]
Further, in the above-described embodiment, by controlling the focus of the optical pickup 3, when the card-type medium D is carried out of the apparatus by the tray 41, the card-type medium D is inserted into the opening 42 for the optical pickup 3. Although the example of determining whether or not there is a possibility of dropping has been described, the method of determining whether or not there is a possibility of the card type medium D falling into the opening 42 for the optical pickup 3 is limited to this example. It is not something that can be done.
[0044]
For example, the system controller 10 irradiates a laser beam by the optical pickup 3 at a predetermined position before carrying out the card type medium D from the inside of the apparatus by the tray 41, and determines whether or not a reflected light with respect to the laser beam is received. I do. If it is determined that the reflected light has been received, the card-type medium D may fall from the opening 42. Therefore, the system controller 10 rotates the card-type medium D by the spindle motor 1 and causes the tray 41 to rotate. Change the position of the card-type medium D above. If it is determined that the reflected light has not been received, there is no possibility that the card-shaped medium D will fall out of the opening 42. Therefore, the system controller 10 carries the card-shaped medium D out of the apparatus using the tray 41.
[0045]
Further, in the above-described embodiment, the case where the optical card is the card-type medium D is described as an example, but it is needless to say that the present invention is not limited to the card-type medium D.
[0046]
It goes without saying that the present invention is applicable to DVD drive devices such as DVD-ROM drive devices, DVD-RAM drive devices, and DVD-R drive devices. Needless to say, the present invention is applicable to a CD-ROM drive device.
[0047]
【The invention's effect】
As described above, according to the present invention, it is possible to prevent the optical card from dropping from the opening for the optical pickup when the optical card is carried out of the apparatus by the tray.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating an example of a configuration of a disk drive device according to an embodiment of the present invention.
FIGS. 2A and 2B are a front view and a cross-sectional view illustrating an example of a card-type medium.
FIG. 3 is a front view and a sectional view showing another example of a card-type medium.
FIG. 4 is a top view showing an example of a tray provided in the disk drive device according to the embodiment of the present invention.
FIG. 5 is a top view showing an example of the state of the card-type medium immediately before unloading the tray of the disk drive device according to the embodiment of the present invention.
FIG. 6 is a top view showing an example of a position where a card-type medium may fall into an opening for an optical pickup when a tray of a disk drive device according to an embodiment of the present invention is unloaded.
FIG. 7 is a flowchart for explaining the operation of the disk drive device according to one embodiment of the present invention;
FIG. 8 is an external view of a conventional disk drive device.
FIG. 9 is an external view of a conventional disk drive device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Spindle motor, 2 ... Turntable, 3 ... Optical pickup, 4 ... Thread mechanism, 5 ... RF amplifier, 6 ... Binarization circuit, 7 ... Data demodulation Circuit 8, buffer memory 9, interface circuit 10, system controller 11, servo control circuit 12, data modulation circuit 13, thread control circuit 14,・ Laser drive circuit, 15 ・ ・ ・ Spindle control circuit, 16 ・ ・ ・ Two-axis control circuit

Claims (4)

A tray for loading an optical card into the device and unloading the optical card from the device;
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
The optical pickup, the driving means, and a control means for controlling the operation of the tray,
An optical card drive device wherein the tray has an opening for the optical pickup,
The control means performs focus control of the optical pickup at a predetermined position before unloading the optical card whose rotation has stopped from the inside of the apparatus,
When the optical card is in focus, it is determined that the optical card may fall from the opening when the optical card is carried out of the apparatus, and the optical card is temporarily rotated, whereby the optical card is rotated. Change the position of the optical card on the tray,
When the optical card is not focused, it is determined that there is no possibility that the optical card is dropped from the opening when the optical card is carried out of the apparatus, and the optical card is carried out of the apparatus by the tray. An optical card drive device characterized by the above-mentioned. A tray for loading an optical card into the device and unloading the optical card from the device;
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
The optical pickup, the driving means, and a control means for controlling the operation of the tray,
A method for controlling an optical card drive device, wherein the tray has an opening for the optical pickup,
Performing a focus control of the optical pickup at a predetermined position before unloading the rotation-stopped optical card from the device;
When the optical card is in focus, it is determined that the optical card may fall from the opening when the optical card is carried out of the apparatus, and the optical card is temporarily rotated, whereby the optical card is rotated. Change the position of the optical card on the tray,
When the optical card is not focused, it is determined that there is no possibility that the optical card is dropped from the opening when the optical card is carried out of the apparatus, and the optical card is carried out of the apparatus by the tray. And a control method of the optical card drive device. A tray for loading an optical card into the device and unloading the optical card from the device;
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
The optical pickup, the driving means, and a control means for controlling the operation of the tray,
An optical card drive device wherein the tray has an opening for the optical pickup,
The control means irradiates a laser beam by the optical pickup at a predetermined position before unloading the optical card, the rotation of which has been stopped by the driving means, from the apparatus, and determines whether or not a reflected light with respect to the laser light is received. And determine
If the reflected light is received, it is determined that the optical card may fall from the opening when the optical card is carried out of the apparatus, and the optical card is temporarily rotated, Changing the position of the optical card on the tray,
If it is determined that the reflected light has not been received, it is determined that there is no possibility that the optical card will fall from the opening when the optical card is carried out of the device, and the optical card is carried out of the device. An optical card drive device, comprising: A tray for loading an optical card into the device and unloading the optical card from the device;
Driving means for rotating the optical card carried into the apparatus by the tray,
An optical pickup for recording and / or reproducing information signals by irradiating the optical card rotated by the driving means with laser light;
The optical pickup, the driving means, and a control means for controlling the operation of the tray,
In a method for controlling an optical card drive device, wherein the tray has an opening for the optical pickup,
A step of irradiating a laser beam by the optical pickup at a predetermined position before unloading the optical card, the rotation of which is stopped by the driving unit, from the apparatus, and determining whether or not a reflected light with respect to the laser beam is received ,
If the reflected light is received, it is determined that the optical card may fall from the opening when the optical card is carried out of the apparatus, and the optical card is temporarily rotated, Changing the position of the optical card on the tray,
If it is determined that the reflected light has not been received, it is determined that there is no possibility that the optical card will fall from the opening when the optical card is carried out of the device, and the optical card is carried out of the device. And controlling the optical card drive device.

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