JP4217681B2 - Optical pickup configuration - Google Patents

Description

  The present invention relates to a configuration of an optical pickup of an optical disc apparatus having two different wavelengths.

In recent years, a Blu-Ray Disc (registered trademark) using a blue laser wavelength has been put into practical use as a next-generation optical disc standard. However, current standards such as DVD and CD-ROM are compatible only with red laser wavelengths such as 780 nm and 650 nm, and are therefore compatible with next-generation optical discs using blue laser wavelengths such as 405 nm. There is a problem that there is no. Therefore, there is a problem that an optical disc device that supports only one standard cannot use an optical disc of another standard. In the prior art, when the current DVD standard is a double-sided disc, there are optical pickups corresponding to the red laser wavelength from the upper and lower sides, but the configuration of the optical pickup having different frequencies has not been invented. It was. Further, as an invention in which pickup is performed from both sides of a disc, Patent Document 1 discloses an invention in which two optical pickups are arranged on both sides of an optical disc, and data recording / reproducing operation is performed simultaneously on both sides of the optical disc to perform high-speed recording operation. However, the configuration of the optical pickup having different frequencies has not been invented.
JP 2001-43548 A

  The current DVD standard optical disk using the red laser wavelength is not compatible with the next generation optical disk using the blue laser, and the majority of the DVD standard and CD standard optical disks currently available will be used in the future. There is a problem that it becomes impossible to do. Further, even if the optical pickups are arranged on both sides of the optical disc as in the prior art, the optical pickups have the same wavelength, so that there is a problem that the optical pickups having different standards are not supported.

Therefore, in the present invention, in order to solve such a problem, a holding unit that holds an optical disk medium accessed from an optical pickup , and a first surface that accesses one surface of the optical disk medium held by the holding unit. A first optical pickup unit that uses a wavelength, and a second optical pickup unit that uses a second wavelength that is a wavelength for accessing the other surface of the optical disc medium and is different from the first wavelength. The first optical pickup unit and the second optical pickup unit determine the type of the accessed medium surface, and based on the determination result, it is recommended to reverse the direction of the disc insertion surface with respect to the holding unit. There is provided an optical disc apparatus having means for outputting first information for output or second information for notifying that the disc type is incorrect. The first wavelength may be a red laser wavelength corresponding to the DVD standard, and the second wavelength may be a blue laser wavelength corresponding to the Blu-Ray standard. A control unit that controls the first optical pickup unit and the second optical pickup unit; the control unit simultaneously drives the first optical pickup unit and the second optical pickup unit; Also good. The control unit performs signal processing for configuring one content based on the first signal obtained from the first optical pickup unit and the second signal obtained from the second optical pickup unit. Also good. Further, the first optical pickup unit and the second optical pickup unit may be simultaneously subjected to a writing process and the other to a reading process.

  Since the present invention includes two optical pickups having a red laser wavelength corresponding to the current DVD standard and a blue laser wavelength corresponding to the Blu-Ray standard, each side of the optical disk medium can be accessed. Thus, it becomes possible to perform read processing and write processing with respect to optical disc media of different standards with a single optical disc apparatus, thereby eliminating compatibility problems. Also, since both sides of the optical disk medium are accessed, one side corresponds to the current DVD standard, and the other side corresponds to the optical disk medium corresponding to the Blu-Ray standard without physically turning the front and back. It becomes possible to perform processing on the standard surface. Furthermore, since it is possible to simultaneously access optical disc media of different standards on both sides, it is possible to perform multi-processing such as reading a recorded program on one side and writing a program being broadcast on the other side.

Hereinafter, embodiments of each invention will be described. Note that the present invention is not limited to these embodiments, and can be implemented in various modes without departing from the spirit of the present invention. In addition, the relationship between the following embodiment and a claim is as follows. In the second embodiment, claims 3 and 7 will be mainly described. In the third embodiment, claims 4 and 8 will be mainly described. In the fourth embodiment, claims 5 and 9 will be mainly described. The fifth embodiment will mainly describe claims 1, 2, 6 and the like.
Prior to the description of each of the above-described embodiments, the first embodiment is a holding unit that holds an optical disk medium accessed from an optical pickup, and an optical disk medium that is held by the holding unit, as an optical disk device related to the present invention. A first optical pickup unit that uses a first wavelength for accessing one surface of the optical disk, and a second wavelength that is a wavelength for accessing the other surface of the optical disk medium and is different from the first wavelength. An optical disk device having a second optical pickup unit to be used will be described.

<< Embodiment 1 >>
<Outline of Embodiment 1>
The present embodiment relates to a configuration of an optical pickup of an optical disc apparatus having different wavelengths. FIG. 1 shows an example of the concept of this embodiment. As shown in FIG. 1, optical pickups are arranged on both upper and lower surfaces of an optical disk medium (0140) that is rotationally driven by a spindle motor (0110), and the first optical pickup (0120) on the lower surface is a laser having a red laser wavelength. The second optical pickup (0130) on the upper surface is picked up using a blue laser wavelength laser.

<Configuration of Embodiment 1>
An example of functional blocks in this embodiment is shown in FIG. The “optical disk device” (0200) of this embodiment shown in FIG. 2 includes a “holding unit” (0210), a “first optical pickup unit” (0220), a “second optical pickup unit” (0230), Consists of. The “holding unit” (0210) holds an optical disk medium accessed from the optical pickup. Examples of the holding unit include a loading motor for taking the optical disk medium into the optical disk device, a turntable for loading the disk medium, a magnet clamp for fixing the disk medium placed on the turntable, a turn A spindle motor for rotating and driving an optical disk medium on the table can be used. The holding unit (0210) may be a combination of any one or more of these. An optical pickup refers to an optical component for converging light emitted from a semiconductor laser and applying it to the disk surface to guide the reflected light to a light receiving element. As an example of access from the optical pickup, the optical head position is transported to the inner and outer peripheral parts of the optical disk medium rotated by the spindle motor, and the sector of each track is accessed. Etc. Further, when the optical pickup accesses the optical disk medium, the optical head position such as focusing and tracking may be controlled to prevent the track vibration due to the surface vibration of the disk or the displacement in the radial direction. Examples of the optical disk medium include CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-R, DVD-RAM, DVD-RW, and the like corresponding to the red laser wavelength, Blu- Examples include those corresponding to the blue laser wavelength such as Ray Disc (registered trademark). As described above, the optical disk medium includes all media that can be accessed using an optical pickup. The red laser wavelength is an arbitrary wavelength in the range of about 610 nm to 780 nm, and the blue laser wavelength is an arbitrary wavelength in the range of 380 nm to 460 nm, and includes blue-violet. Examples of the first optical pickup unit include a laser oscillator, a beam splitter that reflects a laser beam emitted from the laser oscillator, and an objective lens that condenses the laser.

The first optical pickup unit (0220) uses a first wavelength for accessing one surface of the optical disk medium held by the holding unit. One surface indicates a surface on which a laser is incident, and when there are recording surfaces over two or more layers such as a single-sided dual-layer or double-sided dual-layer disc as in the DVD standard, two layers are equivalent. A recording surface may be included. The first wavelength includes any wavelength accessible to the optical disk medium. As an example, a red laser wavelength represented by a laser wavelength of 780 nm in the CD standard, a laser wavelength of 650 nm in the DVD standard, a blue laser wavelength represented by a laser wavelength of 405 nm in the Blu-Ray standard, or the like, a wavelength of 205 to 335 nm Examples include ultraviolet laser wavelength. The first wavelength is not limited to the above wavelength, but includes all the laser wavelengths according to the standard. Here, it is assumed that the first wavelength in the present embodiment is a red laser wavelength corresponding to the DVD standard. Of course, a red laser compatible with the DVD standard also supports the CD standard. The second optical pickup unit (0230) uses a second wavelength for accessing the other surface of the optical disk medium. The other surface means a surface different from the one surface. Therefore, when one surface is the upper surface of the disk medium, the other surface is the lower surface of the disk medium. Further, when the holding unit is provided in the vertical direction as in the optical disk device in the tower type PC, the recording surface is not the top and bottom but the left and right surfaces, so that one surface is the right surface of the disk medium. Sometimes the other side is the left side of the disc medium. Of course, as shown in FIG. 3, the medium surfaces may be reversed. The second wavelength includes any wavelength accessible to the optical disc medium as described for the first wavelength. The second wavelength is limited to a different wavelength from the first wavelength (the same applies throughout the present specification) . One of the objects of the present invention is that it is possible to pick up optical disc media having different incompatible standards using different laser wavelengths with one optical disc apparatus. In the present embodiment, since the first wavelength is the red laser wavelength, the second wavelength is a blue laser wavelength corresponding to the Blu-Ray standard. Of course, the first wavelength may be a blue laser wavelength and the second wavelength may be a red laser wavelength. The example which comprises a 2nd pick-up part is the same as that of what was demonstrated by the 1st optical pick-up part. Each unit that is a component of the present invention is configured by any one of hardware, software, and both hardware and software. For example, as an example for realizing these, when using a computer, hardware including a CPU, a memory, a bus, an interface, firmware, a peripheral device, etc., and a driver that can be executed on these hardware, Software can be mentioned. Specifically, the functions of each part are realized by processing, storing, and outputting data on the memory and data input via the interface by sequentially executing the program expanded on the memory (this book) The same applies throughout the specification.)

<Processing Flow and Effects of Embodiment 1>
FIG. 4 shows an example of the processing flow in this embodiment. The operation method of the optical disk apparatus according to the present embodiment includes a step of holding an optical disk medium accessed from an optical pickup (S0410), and a first wavelength for accessing one surface of the held optical disk medium. A step of performing pickup (S0420), a step of performing optical pickup using a second wavelength for accessing the other surface of the optical disk medium (S0430), and a step of acquiring information from the medium surface (S0421, S0431). ). This embodiment includes two optical pickups of a red laser wavelength corresponding to the current DVD standard and a blue laser wavelength corresponding to the Blu-Ray standard, and each side of the optical disk medium can be accessed. It is possible to perform read processing and write processing on an optical disc medium with a single optical disc apparatus. In the present invention, since both sides of the optical disk medium can be accessed, both sides of the optical disk medium which is the current DVD standard and the other side is the Blu-Ray standard can be physically upside down. It is possible to perform processing on each standard surface without returning.

<< Embodiment 2 >>
<Outline of Embodiment 2>
In the present embodiment, in addition to the first embodiment, a control unit that controls the first optical pickup unit and the second optical pickup unit is provided, and the first optical pickup unit and the second optical pickup unit are driven simultaneously. Features.

<Configuration of Embodiment 2>
FIG. 5 shows an example of a functional block diagram in the present embodiment. The optical pickup device (0500) of the present embodiment shown in FIG. 5 includes a “holding unit” (0510), a “first optical pickup unit” (0520), a “second optical pickup unit” (0530), “ Control unit "(0540). The configuration excluding the “control unit” (0540) is the same as that in the first embodiment. Since the constituent elements other than the “control unit” (0440) are the same as those described in the first embodiment, description thereof is omitted here. The “control unit” (0540) controls the first optical pickup unit (0520) and the second optical pickup unit (0530). Examples of the control method include emission control of a laser used for a light source and position control of an optical sensor. Further, it is possible to perform error control by detecting a laser reflected on an optical disk medium, or to perform control of reading a signal on a recording surface from a laser reflected and incident on a photodetector. The control unit (0540) may also control the holding unit. The control unit (0540) drives the first optical pickup unit (0520) and the second optical pickup unit (0530) simultaneously. An example of simultaneous driving includes simultaneous access to an optical disk medium held in a holding unit. By simultaneously driving, when there are recording surfaces on both sides of the optical disk medium, it is possible to simultaneously perform reading processing and writing processing. In particular, when one side of the optical disk medium is a recording surface of the current DVD standard and the other side is a recording surface of the Blu-Ray standard, information is accessed by simultaneously accessing recording surfaces of different standards. The ability to process information is increased.

<Processing Flow and Effects of Embodiment 2>
FIG. 6 is a diagram showing an example of the flow of processing in the present embodiment. The operation method of the optical disc apparatus in the present embodiment is the same as that in the first embodiment except for the step of simultaneously driving the first optical pickup and the second optical pickup (S0640), and thus the description thereof is omitted here. . In this embodiment, since the control unit is provided and the first optical pickup unit and the second optical disk pickup unit can be simultaneously driven, it is possible to simultaneously perform optical pickup on both sides of the optical disk medium. Become. As a result, even if the standards on both sides of the optical disk medium are different, optical pickups corresponding to the respective standards can be performed simultaneously, so that it is possible to provide an optical disk device with high processing capability. it can.

<< Embodiment 3 >>
<Outline of Embodiment 3>
The present embodiment includes a control unit that simultaneously drives the first optical pickup unit and the second optical pickup unit as in the second embodiment. It is possible to reproduce or store the contents of the above.

<Configuration of Embodiment 3>
FIG. 7 shows an example of a functional block diagram in the present embodiment. The optical disc device (0700) in the present embodiment includes a “holding unit” (0710), a “first optical pickup unit” (0720), a “second optical pickup unit” (0730), and a “control unit” (0740). ). The “control unit” (0740) includes “multi-input control means” (0741). The configuration excluding “multi-input control means” (0741) is the same as that of the second embodiment. Further, the constituent elements other than the “multi-input control means” (0741) are the same as those described in the second embodiment, and thus the description thereof is omitted here. The “multi-input control means” (0741) has one content based on the first signal obtained from the first optical pickup unit (0720) and the second signal obtained from the second optical pickup unit (0730). The signal processing for configuring is performed. The signal is, for example, a signal obtained by reflecting light from a row of minute holes called pits scattered on the recording surface by emitting a laser on the recording surface.

  The one content may be, for example, video information or music information already recorded on the optical disc medium, or may be video information or music information scheduled to be written on the optical disc medium. Thus, for example, when one surface of the optical disk medium corresponds to the red laser wavelength of the current DVD standard and the other surface corresponds to the blue laser wavelength of the Blu-Ray standard, a movie is recorded on the optical disk medium. If so, video information may be recorded on the recording surface of the Blu-Ray standard with a large storage capacity, and audio information may be recorded on the recording surface of the current DVD standard with a small storage capacity. In such a case, since it is possible to compose a single movie content from signals obtained from the respective recording surfaces, it is possible to view a movie with higher image quality and higher sound. As another example, there is a case where information about a video is recorded on one side and information about a program is recorded on the other side. This is a multi-story by combining the video and the program when various scenes of the movie are recorded on one side and a program that freely changes the story of the movie is recorded on the other side. It is possible to compose one content called a composed movie. As another example, there is a case where information about a video is recorded on one surface and information about a dictionary is recorded on the other surface. This is because when a movie is recorded on one side and information about the clothes worn by the protagonist of the movie or information about music playing on BGM is recorded on the other side, Detailed information such as names and music titles can also be known, and by combining the detailed information with video information, it is possible to compose a single content such as a movie that focuses on details. As another example, there is a case where information about a video is recorded on one side and information about a map is recorded on the other side. This constitutes one content, which is detailed guidance information about the hot spring town, when video of the hot spring town is recorded on one side and map information of the hot spring town is recorded on the other side. It becomes possible. As another example, there is a case where information about a program is recorded on one surface and the other surface. This is because when the map software is recorded on one side and the train transfer guidance software is recorded on the other side, the programs on each side work together to form one content in a complementary manner. Is possible.

  On the other hand, it is also possible to write information for constituting one content on the optical disk medium. For example, when a certain backup information is written on an optical disk medium and is to be stored, the same backup is performed on an optical disk medium having a recording surface of the DVD standard on one side and a recording surface of the Blu-Ray standard on the other side. Information can be written simultaneously. As a result, information corresponding to the DVD standard and the Blu-Ray standard can be recorded at the same time, so that it is possible to provide an optical disk device with high compatibility.

<Processing Flow and Effects of Embodiment 3>
FIG. 8 is a diagram illustrating an example of a processing flow in the present embodiment. Since the processing flow in the present embodiment is the same as that described in the second embodiment except for the signal processing step (S0841) for constituting one content, the description is omitted here. The step (S0841) performs signal processing for constituting one content based on the first signal and the second signal. Here, there is a case where information recorded on the optical disc medium is read from the first signal and the second signal, or the presence of the optical disc medium is detected from the first signal and the second signal, and the optical disc medium is read. In some cases, write processing is performed. As described above, since the present embodiment makes it possible to perform signal processing for constituting one content based on signals obtained from pickups on both sides of an optical disc medium, for example, one side is a recording surface of a DVD standard. On the other side, the same information can be simultaneously written on the optical disc medium having the recording surface of the Blu-Ray standard. As a result, information corresponding to the DVD standard and the Blu-Ray standard can be recorded simultaneously, so that an efficient recording method can be established. Also, for example, by reading video information from the recording surface of the Blu-Ray standard and audio information from the recording surface of the current DVD standard, it is possible to reproduce movies with higher image quality and higher audio.

<< Embodiment 4 >>
<Outline of Embodiment 4>
The optical disc apparatus according to the present embodiment includes a control unit that controls the first optical pickup unit and the second optical pickup unit, as in the second or third embodiment, but in addition to the second or third embodiment, Is characterized in that a writing process is performed simultaneously and a reading process is performed simultaneously on the other.

<Configuration of Embodiment 4>
FIG. 9 shows an example of a functional block diagram in the present embodiment. The optical disc apparatus (0900) in this embodiment includes a “holding unit” (0910), a “first optical pickup unit” (0920), a “second optical pickup unit” (0930), and a “control unit” (0940). ). The “control unit” (0940) includes “multi-processing means” (0941). The configuration excluding “multi-processing means” (0941) is the same as that in the second or third embodiment. In addition, since the constituent elements other than the “multi-processing unit” (0941) are the same as those described in the second or third embodiment, the description thereof is omitted here. The “multi-processing means” (0941) causes the first optical pickup unit and the second optical pickup unit to simultaneously perform a writing process on one side and a reading process on the other side. For example, when recording a TV program, it is possible to simultaneously read and play a program that has already been recorded on an optical disk medium while writing the currently broadcast program on one side of the optical disk medium. It becomes. In addition, when one surface corresponds to the current DVD standard and the other surface corresponds to the Blu-Ray standard, the information recorded on the current DVD is read and the recording surface of the Blu-Ray standard is read. It is also possible to write information on the recording surface of the current DVD standard by reading information recorded on the recording surface of the Blu-Ray standard. This makes it possible to mirror arbitrary information. For example, even an optical disc device that does not support the Blu-Ray standard can indirectly read information recorded in the Blu-Ray standard. It becomes.

<Processing Flow and Effects of Embodiment 4>
FIG. 10 shows an example of the flow of processing in this embodiment. The configuration excluding the step (S1041 and S1042) in which writing processing is performed simultaneously on one of the optical pickups and reading processing on the other is the same as in the second or third embodiment. In the present embodiment, for the first optical pickup unit and the second optical pickup unit, it is possible to simultaneously perform a writing process on one side and a reading process on the other side. Mirroring is possible for optical disc media that are not compatible as in the Ray standard, and information recorded on different standard surfaces can be read indirectly.

<< Embodiment 5 >>
<Outline of Embodiment 5>
In addition to any one of the first to fourth embodiments, the optical disc device in this embodiment determines whether the standard of the optical disc medium is compatible with the optical pickup of the optical disc device, and outputs an error message if it does not match. It is characterized by that. FIG. 11 is a conceptual diagram of the optical disc apparatus in the present embodiment. If an optical disk medium is inserted into the optical disk device and the standard is different from the corresponding standard, an error lamp is lit to alert the user.

<Configuration of Embodiment 5>
FIG. 12 shows an example of a functional block diagram in the present embodiment. The optical disc apparatus (1200) in the present embodiment includes a “holding unit” (1210), a “first optical pickup unit” (1220), and a “second optical pickup unit” (1230). The first optical pickup unit (1220) and the second optical pickup unit (1230) include “medium surface type determination unit” (1221, 1231) and “error message unit” (1222, 1232). The configuration excluding “medium surface type determination means” (1221, 1231) and “error message means” (1222, 1232) is the same as that of any of the first to fourth embodiments. Further, each constituent requirement except “medium surface type determination means” (1221, 1231) and “error message means” (1222, 1232) is the same as that described in any one of the first to fourth embodiments. Therefore, the description here is omitted. “Media surface type determination means” (1221, 1231) determines the type of the accessed medium surface. As an example of the type of the accessed medium surface, there are a CD standard, a DVD standard, a Blu-Ray standard, and the like. The types in the present embodiment are classified into types corresponding to the red laser wavelength such as the current DVD and CD and types corresponding to the blue laser wavelength such as Blu-Ray Disc (registered trademark). As will be described, the invention is not limited to the two types. "Error message means" (1222, 1232) is a first information for notifying that the disk type is incorrect based on the determination result of the medium surface type determination means, or the insertion of the disk into the holding unit. Output second information to recommend reversing the surface direction. As a specific output method of the first information and the second information, as shown in FIG. 11, there is a method of transmitting an error message to the user by turning on an error lamp corresponding to each error. It is done. FIG. 11 shows an optical disk apparatus provided with a first error lamp and a second error lamp. However, a single lamp is physically provided and blue when normal, and red when first information is output. However, when outputting the second information, it may be an optical disk device that outputs the error content by the blinking color of the lamp, such as outputting yellow. In this embodiment, the error message means is included in each of the first optical pickup unit and the second optical pickup unit. However, the error message unit is different from the optical pickup unit as an integrated error message unit. Also good.

  In this embodiment, the first pickup unit that accesses one surface of the optical disk medium held by the holding unit (1110) uses the red laser wavelength corresponding to the DVD standard to access the other surface of the optical disk medium. The second pickup unit to be described will be described by taking as an example the case of using a blue laser wavelength corresponding to the Blu-Ray standard. Further, one surface indicates the lower surface when the optical disk medium is inserted into the optical disk apparatus as shown in FIG. 11, and the other surface indicates the upper surface as an example. . The optical disk apparatus shown in FIG. 11 includes a first error lamp (1110, 1111) indicating an error in the disk type, a second error lamp (1120) for encouraging the disk insertion direction to be reversed, and a normal lamp (1130). 1131). First, when a current single-sided recording layer DVD is inserted into the optical disk device with the recording surface facing down, the information picked up by the optical pickup unit on the bottom surface can be read normally. It becomes OK and the normal lamp (1131) is turned on. On the other hand, the optical pickup section on the upper surface is not the medium surface of the optical disc that complies with the Blu-Ray standard, so information cannot be read normally, the disc type is NG, the first information is output and the first information is output. One error lamp (1110) is lit. This is the same even when a DVD having a double-sided recording layer is inserted. Next, an explanation will be given of the case where an optical disk medium having a medium surface corresponding to the DVD standard and the other surface corresponding to the Blu-Ray standard is inserted into the optical disk medium so as to conform to each standard. To do. In this case, since the information can be normally read in either optical pickup section, the first information is not output from either optical pickup section, and the normal lamps (1130, 1131) are turned on. Next, a description will be given of a case where an optical disk medium having a medium surface corresponding to the Blu-Ray standard is inserted into an optical disk apparatus so that the standard surface conforms to a single-sided recording layer optical disk medium. Since the pickup unit on the lower surface is not the medium surface of the optical disc corresponding to the DVD standard, information cannot be read normally, the disc type is NG, the first information is output, and the first error lamp (1111) is output. ) Lights up. However, since the optical pickup unit on the upper surface can read the information on the medium surface of the optical disc corresponding to the Blu-Ray standard, the type of the disc is OK and the first information is not output, and the normal error lamp (1130). Lights up. Next, a description will be given of a case where an optical disk medium in which one side is a medium side corresponding to the DVD standard and the other side is a medium side corresponding to the Blu-Ray standard is inserted in the opposite direction. In this case, since information cannot be normally read by either optical pickup, the first information is output and the first error lamps (1110, 1111) are turned on.

  Next, a case where the second information for recommending that the direction of the disc insertion surface is reversed is output will be described. As an example of outputting the second information, information about the corresponding standards is recorded in each optical pickup unit and cannot be read by the own optical pickup unit, but can be read by the other optical pickup unit. In some cases, the second information is output and the second error lamp (1120) is turned on. Therefore, when the second error lamp is turned on, the first error lamps (1110, 1111) are also turned on.

  Further, as in the optical disk apparatus shown in FIG. 13, the error lamps on the upper and lower surfaces of the disk may be unified and an error message may be output only when the optical disk medium cannot be read at all. A specific example will be described with reference to FIG. FIG. 14 shows an example of a determination table for determining whether or not to perform error display based on the type result of the upper disk and the lower disk. Case 1 will be described. First, when a current single-sided recording layer DVD is inserted into the optical disk device with the recording surface facing down, the information picked up by the optical pickup unit on the bottom surface can be read normally. It becomes OK. On the other hand, the optical pickup unit on the upper surface is not a medium surface of an optical disc that complies with the Blu-Ray standard, so information cannot be read normally, the disc type is NG, and the first information is output. However, in the case of the case 1, since the disk type of the lower surface is OK among the upper surface and the lower surface, only the first information is sent from only one optical pickup. ) Is not lit, and the normal lamp (1330) is lit. This is the same even when a DVD having a double-sided recording layer is inserted. Next, Case 2 will be described. Case 2 is a case where an optical disc medium having one side corresponding to the DVD standard and the other side corresponding to the Blu-Ray standard is inserted into the optical disc medium so as to conform to each standard. Show. In this case, since the information can be normally read in either optical pickup unit, the first information is not output from either optical pickup unit. Accordingly, the normal lamp (1330) is turned on. Next, Case 3 will be described. Case 3 shows a case where an optical disk medium having a single-sided recording layer and having a medium surface corresponding to the Blu-Ray standard is inserted into the optical disk apparatus so that the standard conforms. Since the pickup unit on the lower surface is not the medium surface of the optical disc corresponding to the DVD standard, information cannot be read normally, the disc type is NG, and the first information is output. However, since the optical pickup unit on the upper surface can read the information on the medium surface of the optical disc corresponding to the Blu-Ray standard, the type of the disc is OK and the first information is not output. As a result, since the first information is only sent from one of the optical pickup units, the first error lamp (1310) is not turned on. Finally, Case 4 will be described. The error lamps (1310, 1320) are lit in this case. This case is divided into two patterns. The first error lamp (1310) may be lit and the second error lamp (1320) may be lit. A specific example in which the first error lamp (1310) is turned on is a case where a disc having the same physical size but not corresponding to the DVD standard or the Blu-Ray standard is inserted. In this case, since the first information is output from either pickup unit, the first error lamp (1310) is lit. On the other hand, when the second error lamp (1320) is lit, an optical disk medium in which one side is a medium surface corresponding to the DVD standard and the other side is a medium surface corresponding to the Blu-Ray standard is reversed. It is a case where it has been inserted into. In this case, for example, the first information from the pickup unit on the lower surface includes information that the medium surface accessed by the pickup unit is a medium surface of the Blu-Ray standard. The first information from the pickup unit includes information that the medium surface accessed by the pickup unit is a DVD standard medium surface. In such a case, by reversing and reinserting the disk medium, the information can be read normally in each pickup unit, so the second information is output and the second error lamp (1320) is output. Lights up and can alert the user.

<Processing Flow and Effects of Embodiment 5>
FIG. 15 is a diagram showing an example of the flow of processing in the present embodiment. The operation method of the optical disc apparatus in this embodiment includes the step of holding an optical disc (S1510), the step of using a wavelength for accessing one surface (S1520), and the step of using a wavelength for accessing another surface (S1530). ), A step of acquiring information from the medium surface (S1521, S1531), a step of determining the type of the accessed medium surface (S1522, S1532), and a step of determining whether the disk type is incorrect (S1523, S1533). ), A step of notifying that the disc type is wrong when the disc type is wrong (S1524, S1534), a step of judging whether the disc purchase side is different (S1525, S1535), If the disc insertion surface is different, change the disc insertion surface direction. It consists a step (S1526, S1536) to recommend to rolling. The operation method excluding the steps (S1522, S1523, S1524, S1525, S1526, S1532, S1533, S1534, S1535, S1536) can be the same as any one of the first to fourth embodiments. In this embodiment, it is possible to determine the type of the medium surface and notify that the disc type is incorrect based on the determination result, or to reverse the direction of the disc insertion surface. Therefore, the user of the optical disk device is alerted when the disk is inserted in the wrong direction, and convenience is improved.

Conceptual diagram for explaining the first embodiment Functional block diagram for explaining the first embodiment The figure explaining the medium surface of the optical disk of Embodiment 1. The figure explaining the flow of processing of Embodiment 1. Functional block diagram for explaining the second embodiment The figure explaining the flow of processing of Embodiment 2. Functional block diagram for explaining the third embodiment The figure explaining the flow of processing of Embodiment 3. Functional block diagram for explaining the fourth embodiment The figure explaining the flow of processing of Embodiment 4 Conceptual diagram for explaining the fifth embodiment Functional block diagram for explaining the fifth embodiment Second conceptual diagram for explaining the fifth embodiment FIG. 10 is a diagram for explaining an error display determination table according to the fifth embodiment; The figure explaining the flow of processing of Embodiment 5

Explanation of symbols

0200 Optical disk device 0210 Holding unit 0220 First optical pickup unit 0230 Second optical pickup unit 0240 Optical disk medium

Claims (9)

  A holding unit for holding an optical disk medium accessed from an optical pickup;
  A first optical pickup unit that uses a first wavelength to access one surface of the optical disc medium held by the holding unit;
  A second optical pickup unit that uses a second wavelength that is a wavelength for accessing the other surface of the optical disk medium and is different from the first wavelength,
  The first optical pickup unit and the second optical pickup unit are medium surface type determining means for determining the type of accessed medium surface;
  Based on the determination result of the medium surface type determination means, first information for notifying that the disk type is incorrect, or a first information for recommending that the insertion surface direction of the disk with respect to the holding unit be reversed. And an error message means for outputting two information.   2. The optical disc apparatus according to claim 1, wherein the first wavelength is a red laser wavelength corresponding to a DVD standard, and the second wavelength is a blue laser wavelength corresponding to a Blu-Ray standard. A control unit for controlling the first optical pickup unit and the second optical pickup unit;
The optical disk apparatus according to claim 1, wherein the control unit drives the first optical pickup unit and the second optical pickup unit simultaneously.   The control unit performs multi-input control for performing signal processing for configuring one content based on a first signal obtained from the first optical pickup unit and a second signal obtained from the second optical pickup unit. The optical disc apparatus according to claim 3, further comprising means.   5. The control unit according to claim 3, wherein the control unit includes a multi-processing unit that simultaneously performs a writing process on one side and a reading process on the other side with respect to the first optical pickup unit and the second optical pickup unit. The optical disk device described.   A holding step for holding an optical disk medium accessed from the optical pickup;
  A first optical pick-up step utilizing a first wavelength to access one side of the held optical disk medium;
  A second optical pickup step using a second wavelength that is a wavelength for accessing the other surface of the optical disc medium and is different from the first wavelength, and an operation method of the optical disc apparatus,
  The first optical pickup step and the second optical pickup step include a medium surface type determination step for determining the type of accessed medium surface;
  Based on the determination result of the medium surface type determination step, first information for notifying that the disk type is incorrect or a first information for recommending that the insertion surface direction of the disk with respect to the holding unit be reversed. Error message step to output two information,
Of operating an optical disc apparatus for executing the above. Performing a control step for controlling the first optical pickup step and the second optical pickup step;
7. The operation method of the optical disc apparatus according to claim 6 , wherein the control step drives the first optical pickup step and the second optical pickup step simultaneously. The control step is a multi-input control for performing signal processing for constituting one content based on the first signal obtained from the first optical pickup step and the second signal obtained from the second optical pickup step. The operation method of the optical disk device according to claim 7 , wherein the steps are executed. The control step includes: the first optical pickup step, the second relative optical pickup step, the writing process to one claim 7 or 8 and the other performing multi process steps for the reading process at the same time 2. An operation method of the optical disc device according to 1.

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