Optical storage medium and related method and device thereof

Abstract

The invention provides an optical storage medium and a related method and device thereof. The optical storage medium includes a first swing trench layer and a plurality of first recording layers between a first surface and a second surface. Each first recording layer is located between the first swing trench layer and the first surface. The first swing groove layer comprises a plurality of first sectors, each first sector carries first address information, and the first address information comprises first surface number information and first layer inner address information. Each recording layer comprises a plurality of second sectors, the position of each second sector corresponds to the position of one first sector, each second sector carries second address information, and the second address information comprises first layer number information and second layer inner address information. Therefore, the data can be read and written accurately and quickly, so that the structure of the optical storage medium can be simplified, and the manufacturing difficulty and cost are reduced. Therefore, more recording layers can be arranged in the optical storage medium, and the storage capacity of the optical storage medium is improved.

Description

Technical Field

[0001] The present application relates to the field of optical storage technology, and in particular to an optical storage medium and related methods and devices. Background Art

[0002] With the rapid development of information technology, the amount of data of various information is growing exponentially, which has put forward a higher demand for data storage. Compared with storage media such as hard disks and tapes, optical storage media have the advantages of long storage life, low maintenance cost, energy saving and environmental protection, and high reliability. Therefore, optical storage media have been widely used. However, the storage capacity of optical storage media is relatively small, and expanding the capacity of optical storage media is an urgent need of the market.

[0003] In the related art, the use of multiple recording layers is an effective measure to significantly increase the storage capacity of optical storage media. For example, Blu-ray Disc (BD) has several specifications such as single-sided double-layer (storage capacity of 50GB), single-sided three-layer (storage capacity of 100GB), single-sided four-layer (storage capacity of 128GB), etc. For another example, Archival Disc (AD) has double-sided six-layer (storage capacity of 300GB or 500GB) specifications.

[0004] However, for optical storage media with multiple recording layers, a wobble groove needs to be made in each recording layer, which makes the manufacturing process of the optical storage medium very complicated, resulting in an increase in the manufacturing cost of the optical storage medium and a decrease in the yield rate. Due to the limitation of the manufacturing process, at present, a maximum of eight recording layers can be made in the optical storage medium, and the number of recording layers in the optical storage medium cannot be increased, which seriously limits the further improvement of the storage capacity of the optical storage medium. Summary of the invention

[0005] The embodiments of the present application provide an optical storage medium and related methods and devices to simplify the manufacturing process of the optical storage medium and reduce the manufacturing cost, thereby breaking through the limitations of the manufacturing process, manufacturing more recording layers in the optical storage medium, and further improving the storage capacity of the optical storage medium.

[0006] In a first aspect, an embodiment of the present application provides an optical storage medium. The optical storage medium in the embodiment of the present application may include: a first surface and a second surface arranged opposite to each other, and a first wobble groove layer and multiple first recording layers arranged between the first surface and the second surface, each first recording layer being located between the first wobble groove layer and the first surface.

[0007] In one possible implementation, the optical storage medium may have a single-sided storage structure, and the optical storage medium may be provided with a wobble groove layer (i.e., the first wobble groove layer) and multiple recording layers (i.e., the first recording layer) on only one side. In another possible implementation, the optical storage structure may have a double-sided storage structure, and the optical storage medium may be provided with a wobble groove layer and multiple recording layers on both sides, that is, in addition to the above-mentioned first wobble groove layer and multiple first recording layers, the optical storage medium may also include: a second wobble groove layer and multiple second recording layers located between the first wobble groove layer and the second surface, and each second recording layer is located between the second wobble groove and the second surface. In a specific implementation, the optical storage medium may be set to a single-sided storage structure or a double-sided storage structure according to actual needs, and the number of recording layers may be set according to actual needs, which is not limited here.

[0008] In an embodiment of the present application, the first wobble groove layer may include a plurality of first sectors, each of which carries first address information, and the first address information may include: first surface number information and first layer internal address information. The first surface number information is used to characterize the first surface S1, and the first layer internal address information is used to characterize the position information of the first sector in the first wobble groove layer. Each first recording layer may include a plurality of second sectors, and the position of each second sector corresponds to the position of a first sector, and the orthographic projection of the second sector in the first wobble groove layer 11 has an overlapping area with the first sector at the corresponding position. Each second sector carries second address information, and the second address information may include: first layer number information and second layer internal address information, wherein the first layer number information is used to characterize the layer number of the first recording layer where the second sector is located, and the second layer internal address information is used to characterize the position information of the second sector in the first recording layer.

[0009] Similar to the structures of the first wobbled groove and the first recording layer, the second wobbled groove layer and the second recording layer may have the following structures:

[0010] The second wobble groove layer may include a plurality of third sectors, each of which carries third address information. The third address information may include: second surface number information and third layer internal address information, wherein the second surface number information is used to characterize the second surface, and the third layer internal address information is used to characterize the position information of the third sector in the second wobble groove layer. Each second recording layer may include a plurality of fourth sectors, and the position of each fourth sector corresponds to the position of a third sector, and the orthographic projection of the fourth sector on the second wobble groove layer has an overlapping area with the third sector at the corresponding position. Each fourth sector carries fourth address information, and the fourth address information includes: second layer number information and fourth layer internal address information, wherein the second layer number information is used to characterize the layer number of the second recording layer where the fourth sector is located, and the fourth layer internal address information is used to characterize the position information of the fourth sector in the second recording layer.

[0011] The structure of the second wobbling groove can be implemented with reference to the structure of the first wobbling groove. Specifically, the specific setting of the third sector can refer to the specific setting of the above-mentioned first sector. The structure of the second recording layer can be implemented with reference to the structure of the first recording layer. Specifically, the specific setting of the fourth sector can refer to the specific setting of the above-mentioned second sector. The repeated parts will not be repeated here.

[0012] In the embodiment of the present application, a first wobbling groove layer and multiple first recording layers are provided on the same side of the optical storage medium, that is, the multiple first recording layers on the same side of the optical storage medium correspond to the same first wobbling groove layer. In addition, by setting the first address information in the first sector of the first wobbling groove layer, the first address information may include: first surface number information and first layer internal address information, and setting the second address information in the second sector of the first recording layer, the second address information may include: first layer number information and second layer internal address information. In this way, during the data reading and writing process, the set position of a first recording layer in a certain surface of the optical storage medium can be quickly located, so that data can be read and written accurately and quickly. Therefore, the scheme of the embodiment of the present application can simplify the internal structure of the optical storage medium, reduce the difficulty and cost of the manufacturing process, thereby breaking through the limitation of the manufacturing process, making more first recording layers in the optical storage medium, and further improving the storage capacity of the optical storage medium.

[0013] In a specific implementation, an optical signal can be used to act on an optical storage medium to implement data writing and reading operations. In an embodiment of the present application, in the process of reading and writing data, two beams of light, a guiding light beam and a recording light beam, need to act on the optical storage medium. The guiding light beam is used to focus on the first wobbling groove layer, and plays a role in locating the data reading and writing position. The recording light beam is used to focus on the first recording layer to implement data reading and writing operations. Specifically, in the process of data writing, when the recording light beam acts on the first recording layer, the physical or chemical properties of the first recording layer can be changed, thereby implementing the data writing operation. In the process of data reading, the reflected light of the recording light beam can be detected, and the data stored in the first recording layer can be determined according to the reflected light of the recording light beam to implement the data reading operation.

[0014] The wobbling groove in the first wobbling groove layer is a reference for focusing and tracking. During the data reading and writing process, the recording beam and the guide beam can be controlled to move synchronously. In a specific implementation, the lens can be controlled to emit a guide beam and a recording beam with different wavelengths. For example, the guide beam can be a red laser beam, and the recording beam can be a blue laser beam. Optionally, a lens can be set on the light-emitting side of the lens to converge the guide beam and the recording beam.

[0015] A swing groove is provided in the first swing groove layer, and the swing groove is recessed relative to other positions of the first swing groove layer. The optical paths of the optical signals directed to the inside and outside of the swing groove are different. By detecting the reflected light of the guide light beam, it can be determined whether the guide light beam is focused on the swing groove according to the intensity of the reflected light of the guide light beam. During the reading and writing process of the optical storage medium, the guide light beam can be controlled to move along the trajectory of the swing groove. In a specific implementation, various encoding information can be represented by the swing frequency of the swing groove. For example, a specific frequency change can be set in the swing groove to represent the above-mentioned first address information. In the production process of the optical storage medium, a protrusion with a shape opposite to that of the swing groove can be set in the mold, and the mold injection molding process is used to obtain a swing groove carrying the first address information.

[0016] In a possible implementation, the position of each second sector in the first recording layer corresponds to the position of a first sector in the first wobble groove layer, and the second-layer address information of the second sector can be the same as the first-layer address information of the corresponding first sector. In this way, during the reading and writing process of the optical storage medium, the recording light beam and the guide light beam move synchronously, and the position of the second sector in the first recording layer can be quickly located.

[0017] Specifically, the optical storage medium in the embodiment of the present application may be a ring-shaped optical disc. The first sector in the first wobble groove layer may include: a first data servo area, a first import area, a first user data area, and a first export area, which are sequentially arranged from the inner circle to the outer circle of the optical disc, and the first data servo area carries the first address information. The second sector in each first recording layer may include: a second data servo area, a second import area, a second user data area, and a second export area, which are sequentially arranged from the inner circle to the outer circle of the optical disc, and the second data servo area carries the second address information.

[0018] In the embodiment of the present application, by setting a first data servo area in the first sector of the first wobble groove layer, the first address information is stored in the first data servo area, and by setting a second data servo area in the second sector of each first recording layer, the second address information is stored in the second data servo area. In this way, during the reading and writing process of the optical storage medium, the servo system can be assisted to quickly locate the data reading and writing position. In addition, the servo system can be assisted to quickly find the layer and position, thereby improving the reliability of finding the layer.

[0019] In the embodiment of the present application, in order to improve the reliability of data stored in the optical storage medium, the address addressing objects of the first wobble groove layer and each first recording layer can be set as an error correction code (ECC) block. In this way, when the data reading in the optical storage medium fails or the read data is erroneous, the data can be corrected by the ECC block. Exemplarily, the size Sk of each ECC block can be 64kb, and the size of each sector (first sector or second sector) can be 2kb, that is, each ECC block can include 32 sectors.

[0020] Exemplarily, the physical address addressing range of each sector (first sector or second sector) may be CL, the size of the data servo area (first data servo area or second data servo area) may be Cs, the size of the lead-in area (first lead-in area or second lead-in area) may be Cin, the size of the lead-out area (first lead-out area or second lead-out area) may be Cout, and the size of the user data area (first user data area or second user data area) may be CL-Cs-Cin-Cout. The byte capacity of the ECC block is Sk, the single-layer byte capacity of the first wobbling groove layer and each first recording layer is CL*Sk, and the logical address of the optical storage medium only addresses the user data area.

[0021] For example, the first address information of the first wobble groove layer may be composed of 25 bits, wherein the first surface number information may be 1 bit, representing a range of 0 to 1, and used to indicate which side of the optical storage medium the current surface is. The first layer internal address information may be 24 bits, for example, the first layer internal address information may be represented as A 23 A 22 ...A0, indicating the range 0~CL(0~2 24 ). In a specific implementation, the first address information can be reflected by the waveform of the wobbling groove.

[0022] During the initialization phase of reading and writing operations on the optical storage medium, the driver in the servo system can read the first surface number information in the first wobble groove layer, and store the read first surface number information in the memory of the driver. During the reading and writing process of the optical storage medium, the first surface number information stored in the driver can be encoded into the second address information of the first recording layer, and the encoded second address information can include: the first surface number information, the first layer number information, and the address information within the second layer. During the reading and writing process, the reading and writing operations can be performed according to the encoded second address information. Exemplarily, the encoded second address information can be composed of 33 bits, wherein the address information within the second layer can be 24 bits, and the address information within the second layer can be the same as the address information within the first layer of the corresponding first sector. For example, the address information within the second layer can be represented as A. 23 A 22...A0, indicating the range 0~CL(0~2 24 ). The first layer number information may be 8 bits. For example, the first layer number information may be represented as A 31 A 30 A…A 24 , indicating a range of 0 to N (0 to 2 8 ), which can represent up to 256 first recording layers.

[0023] The above is an example of the representation of the first address information and the second address information. In specific implementation, the specific representation of the first address information and the second address information can be set according to actual needs, and is not limited here.

[0024] In a second aspect, the present application also provides a method for manufacturing an optical storage medium. The method for manufacturing an optical storage medium in the present application can be performed by a manufacturing device in a production line.

[0025] The method for manufacturing the optical storage medium in the implementation of the present application may include:

[0026] Step 1: forming a plurality of first recording layers on a substrate, each of the first recording layers comprising a plurality of second sectors.

[0027] In an embodiment of the present application, the first recording layer may include a material that can produce a physical or chemical property change under the action of an optical signal. Exemplarily, the first recording layer may include a copper (Cu) material layer and a silicon (Si) material layer. Before the optical signal is irradiated, the reflectivity of the silicon material layer is relatively high. After being acted upon by the optical signal, a thermal effect will be generated at the focal point of the first recording layer, causing Cu and Si to form a CuSi alloy. The reflectivity of the CuSi alloy is relatively high, that is, the optical signal can cause the reflectivity of the first recording layer to change. In this way, during the data writing process, a recording light beam can be focused on the first recording layer, and the reflectivity of the first recording layer can be changed by the recording light beam, thereby writing data in the first recording layer. During the data reading process, the reflected light of the recording light beam focused on the first recording layer can be detected. By detecting the intensity of the reflected light of the recording light beam, the data stored in the first recording layer can be determined, thereby realizing the reading of the data stored in the first recording layer.

[0028] Step 2: Form a first wobble groove layer on multiple first recording layers. The first wobble groove layer includes multiple first sectors. The position of each first sector corresponds to the position of a second sector. The orthographic projection of the second sector on the first wobble groove layer overlaps with the first sector at the corresponding position. Each first sector carries first address information. The first address information includes: first surface number information and first layer internal address information. The first surface number information is used to characterize the first surface of the substrate, and the first layer internal address information is used to characterize the position information of the first sector in the first wobble groove layer. In practical applications, a protrusion with a shape opposite to that of the first wobble groove layer can be made in a mold, and a mold injection molding process is used to obtain the first wobble groove layer carrying the first address information.

[0029] Step 3: Write the second address information to each of the multiple second sectors of the first recording layer. The second address information includes: first layer number information and second layer internal address information, the first layer number information is used to indicate the layer number of the first recording layer where the second sector is located, and the second layer internal address information is used to indicate the position information of the second sector in the first recording layer.

[0030] Specifically, writing the second address information to the plurality of second sectors of each first recording layer in the above step 3 may specifically include:

[0031] The guide light beam is controlled to focus on the first wobbling groove layer, and the first address information of the first sector currently focused by the guide light beam is determined according to the reflected light of the guide light beam. Since the first wobbling groove layer manufactured in the above steps carries the first address information, the first address information of the first sector currently focused by the guide light beam can be obtained by detecting the reflected light of the guide light beam and decoding the information carried by the reflected light of the guide light beam.

[0032] The recording beam is controlled to focus on the first recording layer, and the recording beam is controlled to be synchronized with the guide beam. Since the first wobbling groove layer is provided with a wobbling groove for focusing and tracking, and the first recording layer is not provided with a wobbling groove, the recording beam is controlled to move synchronously with the guide beam, so that the second sector focused by the recording beam corresponds to the position of the first sector focused by the guide beam, and subsequently the address information in the second layer of the second sector can be set to be the same as the address in the first layer of the corresponding first sector.

[0033] According to the reflected light of the recording light beam, the first layer number information of the first recording layer on which the recording light beam is currently focused is determined. In a specific implementation, a four-quadrant detector can be used to detect the reflected light of the recording light beam, and the four-quadrant detector can collect signal values ​​of the four quadrants A, B, C, and D. The servo system can obtain a focus error (FE) value based on the collected signal values ​​of the four quadrants. The FE value is used to indicate whether the recording light beam is focused on the first recording layer. When the FE value is 0, it means that the recording light beam is focused on the first recording layer. When the FE value is greater than 0, it means that the recording light beam is not focused on the first recording layer. During the production process, the servo system will scan each first recording layer at the maximum range, and by controlling the movement of the lens, the recording light beam is focused on each first recording layer in turn. The first layer number information of the first recording layer currently focused can be determined by counting layer by layer.

[0034] Based on the determined first layer number information and the first address information of the first sector on which the guiding light beam is currently focused, the second address information of the second sector on which the recording light beam is currently focused is determined, and the determined second address information is written into the second sector on which the recording light beam is currently focused; wherein the address information within the second layer of the second sector is the same as the address information within the first layer of the corresponding first sector.

[0035] According to the above method, the second address information can be written to multiple second sectors of each first recording layer. Since the second address information includes: first layer number information and second layer internal address information, in the subsequent data writing and reading process, fast layer positioning can be achieved according to the first layer number information.

[0036] In the manufacturing method of the optical storage medium provided in the embodiment of the present application, by manufacturing a wobble groove carrying the first address information in the first wobble groove layer, and writing the second address information in the multiple first recording layers, in this way, in the subsequent data reading and writing process, the set position of a first recording layer in a certain side of the optical storage medium can be quickly located, so that data can be read and written accurately and quickly. In addition, the scheme of the embodiment of the present application can simplify the internal structure of the optical storage medium, reduce the difficulty and cost of the manufacturing process, thereby breaking through the limitation of the manufacturing process, manufacturing more first recording layers in the optical storage medium, and further improving the storage capacity of the optical storage medium.

[0037] In a third aspect, an embodiment of the present application further provides a layer-finding method for an optical storage medium, which can be applied to a data writing or reading process of any optical storage medium in the first aspect. The layer-finding method for an optical storage medium in an embodiment of the present application may include:

[0038] The guide beam is controlled to focus on the first wobbling groove layer, and the recording beam synchronized with the guide beam is controlled to randomly focus on a first recording layer. In a specific implementation, the guide beam can be controlled to focus on a first sector in the first wobbling groove layer, so that the recording beam is focused on a second sector corresponding to the position of the first sector.

[0039] According to the reflected light of the recording beam, the first layer number information of the first recording layer currently focused by the recording beam is determined. Specifically, according to the reflected light of the recording beam, the second address information carried by the second sector focused by the recording beam can be determined, and according to the second address information, the first layer number information of the current first recording layer can be determined.

[0040] Determine the distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer; wherein the target recording layer is the first recording layer to be read and written;

[0041] The recording beam is controlled to move according to the determined distance information so that the recording beam is focused on the target recording layer. In the process of controlling the movement of the recording beam, the distance information can be counted layer by layer to move the recording beam to the target recording layer.

[0042] For example, an optical storage medium is provided with a first wobbling groove layer and ten first recording layers on the same side, and the target recording layer is the fifth first recording layer. In the related art, it is necessary to control the recording light beam to first find the first wobbling groove layer, and then control the recording light beam to move from the first wobbling groove layer to each first recording layer, and move to the fifth first recording layer by counting layer by layer. The layer-seeking method in the related art seeks the layer in the order of each first recording layer, the layer-seeking speed is slow, and the possibility of layer-seeking errors is high. In the layer-seeking method in the embodiment of the present application, the recording light beam can be controlled to randomly focus on a first recording layer, and the first layer number information of the current first recording layer can be obtained according to the reflected light of the recording light beam, for example, the current first recording layer is the third first recording layer. Then, the recording light beam is controlled to move two first recording layers, so that the recording light beam can be focused on the fifth first recording layer. Compared with the layer-seeking method in the related art, the layer-seeking method provided in the embodiment of the present application can realize layer-seeking according to the first layer number information of the first recording layer, so that the distance moved by the recording light beam is shorter, and the layer-seeking speed can be accelerated. Since the distance the recording light beam moves is shorter, the possibility of layer-seeking errors is smaller, thus improving the reliability of layer-seeking.

[0043] In addition, the above layer-finding method may further include:

[0044] re-determining the first layer number information of the first recording layer on which the recording light beam is focused according to the reflected light of the recording light beam;

[0045] Based on the first layer number information of the determined first recording layer, determine whether the first recording layer on which the recording light beam is focused is the target recording layer; if the first recording layer on which the recording light beam is currently focused is not the target recording layer, redetermine the distance information between the first recording layer and the target recording layer, and control the movement of the recording light beam based on the determined distance information until the recording light beam is focused on the target recording layer.

[0046] In the embodiment of the present application, it is possible to verify whether the currently focused first recording layer is the target recording layer according to the first layer number information of the first recording layer, thereby further improving the reliability of layer seeking.

[0047] In a fourth aspect, the embodiments of the present application further provide a layer-finding device for an optical storage medium. The layer-finding device in the embodiments of the present application may be a data writing device for the optical storage medium, or the layer-finding device in the embodiments of the present application may also be a data reading device for the optical storage medium, or the layer-finding device in the embodiments of the present application may also be a reading and writing device for the optical storage medium. For example, the layer-finding device in the embodiments of the present application may be an optical drive.

[0048] The layer-seeking device of the optical storage medium in the embodiment of the present application may include:

[0049] The servo driver is used for controlling the guiding light beam to focus on the first wobbling groove layer, and controlling the recording light beam synchronized with the guiding light beam to focus on a first recording layer.

[0050] The processor is used to determine the first layer number information of the first recording layer on which the recording light beam is currently focused according to the reflected light of the recording light beam; determine the distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer; the target recording layer is the recording layer to be read and written;

[0051] The servo driver is further used to control the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer.

[0052] Furthermore, in some embodiments of the present application, the processor may also be used for: after the servo driver controls the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer, re-determining the first layer number information of the first recording layer on which the recording light beam is focused according to the reflected light of the recording light beam; and judging whether the first recording layer currently focused on by the recording light beam is the target recording layer according to the determined layer number information of the first recording layer; if the first recording layer focused on by the recording light beam is not the target recording layer, re-determining the distance information between the first recording layer and the target recording layer, and controlling the servo driver to control the movement of the recording light beam according to the determined distance information until the recording light beam is focused on the target recording layer.

[0053] In the layer-finding device provided in the embodiment of the present application, the servo driver can control the recording light beam to randomly focus on a first recording layer, and the processor can obtain the first layer number information of the current first recording layer according to the reflected light of the recording light beam, and determine the distance information between the current first recording layer and the target recording layer, so that the servo driver can control the movement of the recording light beam according to the determined distance information, so that the recording light beam is focused on the target recording layer. In this way, layer-finding can be achieved according to the first layer number information of the first recording layer, so that the distance moved by the recording light beam is shorter, and the layer-finding speed can be accelerated. Since the distance moved by the recording light beam is shorter, the possibility of layer-finding errors is smaller, and the reliability of layer-finding is improved. In addition, the processor can also verify whether the currently focused first recording layer is the target recording layer according to the first layer number information of the first recording layer, further improving the reliability of layer-finding.

[0054] In a fifth aspect, an embodiment of the present application further provides an electronic device, which may include: any layer-finding device in the fourth aspect and a housing, wherein the layer-finding device is located in the housing. Exemplarily, the electronic device may be a device having a layer-finding device, such as a laptop computer, a desktop computer, or a server. Since the layer-finding device can realize fast layer-finding of an optical storage medium, and the reliability of layer-finding is high, the electronic device including the layer-finding device can realize fast reading and writing of an optical storage medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] Figure 1 A schematic diagram of the structure of an optical storage medium provided in an embodiment of the present application;

[0056] Figure 2 Another schematic diagram of the structure of the optical storage medium provided in the embodiment of the present application;

[0057] Figure 3 This is a schematic diagram of the planar structure of the first wobbled groove layer in an embodiment of the present application;

[0058] Figure 4 Schematic diagram of encoding method of the first sector and the second sector in the embodiment of the present application;

[0059] Figure 5 is a flow chart of a method for manufacturing an optical storage medium in an embodiment of the present application;

[0060] Figure 6 This is a flow chart of a layer-finding method for an optical storage medium in an embodiment of the present application;

[0061] Figure 7 Schematic diagram of the structure of the layer-seeking device of the optical storage medium in the embodiment of the present application.

[0062] Reference numerals:

[0063] 11-first wobbling groove layer; 111-wobbling groove; 12-first recording layer; 13-lens; 14-second wobbling groove layer; 15-second recording layer; 401-servo drive; 402-processor; S1-first surface; S2-second surface; P1-guiding beam; P2-recording beam. DETAILED DESCRIPTION

[0064] With the rapid development of information technology, the amount of data of various information is growing exponentially, which puts forward higher requirements for data storage. Compared with storage media such as hard disks and tapes, optical storage media have the advantages of long storage life, low maintenance cost, energy saving and environmental protection, and high reliability. Therefore, optical storage media has been widely used.

[0065] However, the storage capacity of optical storage media is relatively small, and expanding the capacity of optical storage media is an urgent need of the market. In the related art, a method of setting multiple recording layers is adopted to increase the storage capacity of optical storage media. However, for optical storage media with multiple recording layers, a wobble groove needs to be made in each recording layer, which makes the manufacturing process of the optical storage medium very complicated, resulting in an increase in the manufacturing cost of the optical storage medium and a decrease in the yield rate. Due to the limitation of the manufacturing process, at present, at most eight recording layers can be made in the optical storage medium, and the number of recording layers in the optical storage medium cannot be increased, which seriously limits the further improvement of the storage capacity of the optical storage medium.

[0066] Based on this, in order to simplify the manufacturing process of optical storage media, reduce the manufacturing cost, and further increase the storage capacity of optical storage media, the embodiment of the present application provides an optical storage medium and related methods and devices. The optical storage medium in the embodiment of the present application can be a medium that uses lasers to read and write data. For example, the optical storage medium can be various types of optical discs such as Blu-ray discs or archive discs.

[0067] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings.

[0068] It should be noted that the same reference numerals in the drawings of this application represent the same or similar structures, and thus their repeated description will be omitted. The words expressing positions and directions described in this application are all explained using the drawings as examples, but they can be changed as needed, and the changes are included in the protection scope of this application. The drawings of this application are only used to illustrate the relative position relationship and do not represent the true proportion.

[0069] Figure 1 and Figure 2 They are schematic diagrams of the structures of the optical storage media provided in the embodiments of the present application, such as Figure 1 and Figure 2As shown, the optical storage medium in the embodiment of the present application may include: a first surface S1 and a second surface S2 arranged opposite to each other, and a first swing groove layer 11 and multiple first recording layers 12 arranged between the first surface S1 and the second surface S2, and each layer of the first recording layer 12 is located between the first swing groove layer 11 and the first surface S1.

[0070] like Figure 1 As shown, in a possible implementation, the optical storage medium may have a single-sided storage structure, and the optical storage medium may be provided with a wobble groove layer (i.e., the first wobble groove layer 11) and a multi-layer recording layer (i.e., the first recording layer 12) on only one side. Figure 1 In the figure, an example is taken in which an optical storage medium is provided with a first wobble groove layer 11 and a plurality of first recording layers 12 on one side of the first surface S1. Figure 2 As shown, in another possible implementation, the optical storage structure may have a double-sided storage structure, and the optical storage medium may be provided with a wobble groove layer and multiple recording layers on both sides. That is to say, in addition to the above-mentioned first wobble groove layer 11 and multiple first recording layers 12, the optical storage medium may also include: a second wobble groove layer 14 and multiple second recording layers 15 located between the first wobble groove layer 11 and the second surface S2, and each second recording layer 15 is located between the second wobble groove 14 and the second surface S2. Figure 1 In the example, the optical storage medium is provided with six first recording layers 12. Figure 2 In the example, an optical storage medium is provided with six first recording layers 12 and six second recording layers 15. In practical applications, the number of first recording layers 12 and second recording layers 15 can be set according to actual needs, which is not limited here.

[0071] In specific implementation, the optical storage medium can be set to a single-sided storage structure or a double-sided storage structure according to actual needs. In the subsequent embodiments of the present application, the optical storage medium is provided with a first wobbled groove layer 11 and a multi-layer first recording layer 12 on one side of the first surface S1 as an example for explanation. When the optical storage medium is a double-sided storage structure, the implementation of the second wobbled groove layer 14 and the multi-layer second recording layer 15 on the second surface S2 side can refer to the implementation of the first wobbled groove layer 11 and the multi-layer first recording layer 12 on the first surface S1 side, and the repeated parts will not be repeated.

[0072] Continue to refer to Figure 1 and Figure 2, the first wobble groove layer 11 may include a plurality of first sectors, each of which carries first address information, and the first address information may include: first surface number information and first layer internal address information. The first surface number information is used to characterize the first surface S1, and the first layer internal address information is used to characterize the position information of the first sector in the first wobble groove layer. Each first recording layer 12 may include a plurality of second sectors, and the position of each second sector corresponds to the position of a first sector, and the orthographic projection of the second sector in the first wobble groove layer 11 has an overlapping area with the first sector at the corresponding position. Each second sector carries second address information, and the second address information may include: first layer number information and second layer internal address information, wherein the first layer number information is used to characterize the layer number of the first recording layer where the second sector is located, and the second layer internal address information is used to characterize the position information of the second sector in the first recording layer.

[0073] like Figure 2 As shown, similar to the structures of the first wobble groove 11 and the first recording layer 12, the second wobble groove layer 14 and the second recording layer 15 may have the following structures:

[0074] The second wobble groove layer 14 may include a plurality of third sectors, each of which carries third address information. The third address information may include: second surface number information and third layer internal address information, wherein the second surface number information is used to characterize the second surface S2, and the third layer internal address information is used to characterize the position information of the third sector in the second wobble groove layer 15. Each second recording layer 15 may include a plurality of fourth sectors, and the position of each fourth sector corresponds to the position of a third sector, and the orthographic projection of the fourth sector in the second wobble groove layer 14 has an overlapping area with the third sector at the corresponding position. Each fourth sector carries fourth address information, and the fourth address information includes: second layer number information and fourth layer internal address information, wherein the second layer number information is used to characterize the layer number of the second recording layer where the fourth sector is located, and the fourth layer internal address information is used to characterize the position information of the fourth sector in the second recording layer.

[0075] The structure of the second wobbling groove 14 can be implemented with reference to the structure of the first wobbling groove 11. Specifically, the specific setting of the third sector can refer to the specific setting of the above-mentioned first sector. The structure of the second recording layer 15 can be implemented with reference to the structure of the first recording layer 12. Specifically, the specific setting of the fourth sector can refer to the specific setting of the above-mentioned second sector. The repeated parts will not be repeated here.

[0076] In the embodiment of the present application, a first wobble groove layer 11 and multiple first recording layers 12 are provided on one side of the first surface S1 of the optical storage medium, that is, the multiple first recording layers 12 on the same side of the optical storage medium correspond to the same first wobble groove layer 11. In addition, by setting the first address information in the first sector of the first wobble groove layer 11, the first address information may include: first surface number information and first layer internal address information, and setting the second address information in the second sector of the first recording layer 12, the second address information may include: first layer number information and second layer internal address information. In this way, during the data reading and writing process, the set position of a certain first recording layer 12 in a certain surface of the optical storage medium can be quickly located, so that data can be read and written accurately and quickly. Therefore, the scheme of the embodiment of the present application can simplify the internal structure of the optical storage medium, reduce the difficulty and cost of the manufacturing process, thereby breaking through the limitation of the manufacturing process, making more first recording layers 12 in the optical storage medium, and further improving the storage capacity of the optical storage medium.

[0077] like Figure 1 and Figure 2 As shown, an optical signal can be used to act on an optical storage medium to implement data writing and reading operations. In an embodiment of the present application, in the process of reading and writing data, two beams of light, namely a guiding light beam P1 and a recording light beam P2, need to act on the optical storage medium. The guiding light beam P1 is used to focus on the first swing groove layer 11, and plays a role in locating the data reading and writing position. The recording light beam P2 is used to focus on the first recording layer 12, and is used to implement data reading and writing operations. Specifically, in the process of data writing, when the recording light beam P2 acts on the first recording layer 12, the physical or chemical properties of the first recording layer 12 can be changed, thereby implementing a data writing operation. In the process of data reading, the reflected light of the recording light beam P2 can be detected, and the data stored in the first recording layer 12 can be determined based on the reflected light of the recording light beam P2, so as to implement a data reading operation.

[0078] The wobbling groove in the first wobbling groove layer 11 is a reference for focusing and tracking. During the data reading and writing process, the recording beam P2 can be controlled to move synchronously with the guide beam P1. In a specific implementation, the lens can be controlled to emit the guide beam P1 and the recording beam P2 with different wavelengths. For example, the guide beam P1 can be a red laser beam, and the recording beam P2 can be a blue laser beam. Optionally, a lens 13 can be provided on the light-emitting side of the lens, and the guide beam P1 and the recording beam P2 can be converged by the lens 13.

[0079] Figure 3 Schematic diagram of the planar structure of the first wobbled groove layer in the embodiment of the present application. Figure 3As shown, a wobble groove 111 is provided in the first wobble groove layer 11, and the wobble groove 111 is concave relative to other positions of the first wobble groove layer 11. The optical paths of the optical signals directed to the inside and outside of the wobble groove 111 are different. By detecting the reflected light of the guide light beam P1, it can be determined whether the guide light beam P1 is focused on the wobble groove 111 according to the reflected light intensity of the guide light beam P1. During the reading and writing process of the optical storage medium, the guide light beam P1 can be controlled to move along the trajectory of the wobble groove 111. In a specific implementation, various encoding information can be represented by the wobble frequency of the wobble groove 111. For example, a specific frequency change can be set in the wobble groove 111 to represent the above-mentioned first address information. In the manufacturing process of the optical storage medium, a protrusion with a shape opposite to that of the wobble groove 111 can be set in the mold, and the mold injection molding process is adopted to obtain the wobble groove 111 carrying the first address information.

[0080] like Figure 1 and Figure 2 As shown, the position of each second sector in the first recording layer 12 corresponds to the position of a first sector in the first wobble groove layer 11, and the second-layer address information of the second sector can be the same as the first-layer address information of the first sector at the corresponding position. In this way, during the reading and writing process of the optical storage medium, the recording light beam P2 moves synchronously with the guide light beam P1, and the position of the second sector in the first recording layer 12 can be quickly located.

[0081] Figure 4 Schematic diagram of the encoding method of the first sector and the second sector in the embodiment of the present application, such as Figure 4 As shown, the optical storage medium in the embodiment of the present application may be a ring-shaped optical disc. The first sector in the first wobble groove layer may include: a first data servo area, a first import area, a first user data area, and a first export area arranged in sequence from the inner circle to the outer circle of the optical disc, and the first data servo area carries the first address information, that is, the first address information is stored in the first data servo area. The second sector in each of the first recording layers 1 to N may include: a second data servo area, a second import area, a second user data area, and a second export area arranged in sequence from the inner circle to the outer circle of the optical disc, and the second data servo area carries the second address information, that is, the second address information is stored in the second data servo area.

[0082] In the embodiment of the present application, by setting a first data servo area in the first sector of the first wobble groove layer, the first address information is stored in the first data servo area, and by setting a second data servo area in the second sector of each first recording layer, the second address information is stored in the second data servo area. In this way, during the reading and writing process of the optical storage medium, the servo system can be assisted to quickly locate the data reading and writing position. In addition, the servo system can be assisted to quickly find the layer and position, thereby improving the reliability of finding the layer.

[0083] In the embodiment of the present application, in order to improve the reliability of data stored in the optical storage medium, the address addressing objects of the first wobble groove layer and each first recording layer can be set as an error correction code (ECC) block. In this way, when the data reading in the optical storage medium fails or the read data is erroneous, the data can be corrected by the ECC block. Exemplarily, the size Sk of each ECC block can be 64kb, and the size of each sector (first sector or second sector) can be 2kb, that is, each ECC block can include 32 sectors.

[0084] Continue to refer to Figure 4 , exemplarily, the physical address addressing range of each sector (first sector or second sector) may be CL, the size of the data servo area (first data servo area or second data servo area) may be Cs, the size of the lead-in area (first lead-in area or second lead-in area) may be Cin, the size of the lead-out area (first lead-out area or second lead-out area) may be Cout, and the size of the user data area (first user data area or second user data area) may be CL-Cs-Cin-Cout. The byte capacity of the ECC block is Sk, the single-layer byte capacity of the first wobbling groove layer and each first recording layer is CL*Sk, and the logical address of the optical storage medium only addresses the user data area.

[0085] For example, the first address information of the first wobble groove layer may be composed of 25 bits, wherein the first surface number information may be 1 bit, representing a range of 0 to 1, for indicating whether the current surface is the first surface or the second surface of the optical storage medium. The first layer internal address information may be 24 bits, for example, the first layer internal address information may be represented as A 23 A 22 ...A0, indicating the range 0~CL(0~2 24 ). In a specific implementation, the first address information can be reflected by the waveform of the wobbling groove.

[0086] During the initialization phase of reading and writing operations on the optical storage medium, the driver in the servo system can read the first surface number information in the first wobble groove layer, and store the read first surface number information in the memory of the driver. During the reading and writing process of the optical storage medium, the first surface number information stored in the driver can be encoded into the second address information of the first recording layer, and the encoded second address information can include: the first surface number information, the first layer number information, and the address information within the second layer. During the reading and writing process, the reading and writing operations can be performed according to the encoded second address information. Exemplarily, the encoded second address information can be composed of 33 bits, wherein the address information within the second layer can be 24 bits, and the address information within the second layer can be the same as the address information within the first layer of the corresponding first sector. For example, the address information within the second layer can be represented as A. 23 A 22 ...A0, indicating the range 0~CL(0~2 24 ). The first layer number information may be 8 bits. For example, the first layer number information may be represented as A 31 A 30 A…A 24 , indicating a range of 0 to N (0 to 2 8 ), which can represent up to 256 first recording layers.

[0087] The above is an example of the representation of the first address information and the second address information. In specific implementation, the specific representation of the first address information and the second address information can be set according to actual needs, and is not limited here.

[0088] Based on the same technical concept, an embodiment of the present application also provides a method for manufacturing an optical storage medium. Figure 5 FIG. 1 is a flow chart of a method for manufacturing an optical storage medium in an embodiment of the present application. Figure 5 As shown, the method for manufacturing the optical storage medium in the embodiment of the present application can be executed by manufacturing equipment of a production line.

[0089] The method for manufacturing the optical storage medium in the implementation of the present application may include:

[0090] S201, forming a plurality of first recording layers on a substrate, each of the first recording layers comprising a plurality of second sectors.

[0091] In an embodiment of the present application, the first recording layer may include a material that can produce a physical or chemical property change under the action of an optical signal. Exemplarily, the first recording layer may include a copper (Cu) material layer and a silicon (Si) material layer. Before the optical signal is irradiated, the reflectivity of the silicon material layer is relatively high. After being acted upon by the optical signal, a thermal effect will be generated at the focal point of the first recording layer, causing Cu and Si to form a CuSi alloy. The reflectivity of the CuSi alloy is relatively high, that is, the optical signal can cause the reflectivity of the first recording layer to change. In this way, during the data writing process, a recording light beam can be focused on the first recording layer, and the reflectivity of the first recording layer can be changed by the recording light beam, thereby writing data in the first recording layer. During the data reading process, the reflected light of the recording light beam focused on the first recording layer can be detected. By detecting the intensity of the reflected light of the recording light beam, the data stored in the first recording layer can be determined, thereby realizing the reading of the data stored in the first recording layer.

[0092] S202, forming a first wobble groove layer on a plurality of first recording layers, the first wobble groove layer comprising a plurality of first sectors, the position of each first sector corresponding to the position of a second sector, the orthographic projection of the second sector on the first wobble groove layer and the first sector at the corresponding position having an overlapping area; each first sector carries first address information, the first address information comprising: first surface number information and first layer internal address information; the first surface number information is used to characterize the first surface of the substrate, and the first layer internal address information is used to characterize the position information of the first sector in the first wobble groove layer. In practical applications, a protrusion having a shape opposite to that of the first wobble groove layer can be made in a mold, and a mold injection molding process is used to obtain the first wobble groove layer carrying the first address information.

[0093] S203, writing second address information to the multiple second sectors of each first recording layer respectively. The second address information includes: first layer number information and second layer internal address information, the first layer number information is used to indicate the layer number of the first recording layer where the second sector is located, and the second layer internal address information is used to indicate the position information of the second sector in the first recording layer.

[0094] Specifically, the above step S203 may specifically include:

[0095] The guiding light beam is controlled to focus on the first wobbling groove layer, and the first address information of the first sector currently focused by the guiding light beam is determined according to the reflected light of the guiding light beam. Since the first wobbling groove layer produced in the above step S202 carries the first address information, the first address information of the first sector currently focused by the guiding light beam can be obtained by detecting the reflected light of the guiding light beam and decoding the information carried by the reflected light of the guiding light beam.

[0096] The recording beam is controlled to focus on the first recording layer, and the recording beam is controlled to be synchronized with the guide beam. Since the first wobbling groove layer is provided with a wobbling groove for focusing and tracking, and the first recording layer is not provided with a wobbling groove, the recording beam is controlled to move synchronously with the guide beam, so that the second sector focused by the recording beam corresponds to the position of the first sector focused by the guide beam, and subsequently the address information in the second layer of the second sector can be set to be the same as the address in the first layer of the corresponding first sector.

[0097] According to the reflected light of the recording light beam, the first layer number information of the first recording layer on which the recording light beam is currently focused is determined. In a specific implementation, a four-quadrant detector can be used to detect the reflected light of the recording light beam, and the four-quadrant detector can collect signal values ​​of the four quadrants A, B, C, and D. The servo system can obtain a focus error (FE) value based on the collected signal values ​​of the four quadrants. The FE value is used to indicate whether the recording light beam is focused on the first recording layer. When the FE value is 0, it means that the recording light beam is focused on the first recording layer. When the FE value is greater than 0, it means that the recording light beam is not focused on the first recording layer. During the production process, the servo system will scan each first recording layer at the maximum range, and by controlling the movement of the lens, the recording light beam is focused on each first recording layer in turn. The first layer number information of the first recording layer currently focused can be determined by counting layer by layer.

[0098] Based on the determined first layer number information and the first address information of the first sector on which the guiding light beam is currently focused, the second address information of the second sector on which the recording light beam is currently focused is determined, and the determined second address information is written into the second sector on which the recording light beam is currently focused; wherein the address information within the second layer of the second sector is the same as the address information within the first layer of the corresponding first sector.

[0099] According to the above method, the second address information can be written to the multiple second sectors of each first recording layer. Since the second address information includes: the first layer number information and the second layer internal address information, in the subsequent data writing and reading process, the first layer number information of the first recording layer can be used to achieve fast layer positioning.

[0100] In the manufacturing method of the optical storage medium provided in the embodiment of the present application, by manufacturing a wobble groove carrying the first address information in the first wobble groove layer, and writing the second address information in the multiple first recording layers, in this way, in the subsequent data reading and writing process, the set position of a first recording layer in a certain side of the optical storage medium can be quickly located, so that data can be read and written accurately and quickly. In addition, the scheme of the embodiment of the present application can simplify the internal structure of the optical storage medium, reduce the difficulty and cost of the manufacturing process, thereby breaking through the limitation of the manufacturing process, manufacturing more first recording layers in the optical storage medium, and further improving the storage capacity of the optical storage medium.

[0101] Based on the same technical concept, an embodiment of the present application further provides a layer-finding method for an optical storage medium, which can be applied to the data writing or reading process of any of the above-mentioned optical storage media. Figure 6 Flow chart of the layer-finding method of the optical storage medium in the embodiment of the present application. Figure 6 As shown, the layer-finding method of the optical storage medium in the embodiment of the present application may include:

[0102] S301, control the guide beam to focus on the first wobbling groove layer, and control the recording beam synchronized with the guide beam to randomly focus on a first recording layer. In specific implementation, the guide beam can be controlled to focus on a first sector in the first wobbling groove layer, so that the recording beam is focused on a second sector corresponding to the position of the first sector.

[0103] S302, determining the first layer number information of the first recording layer currently focused by the recording beam according to the reflected light of the recording beam. Specifically, the second address information carried by the second sector focused by the recording beam can be determined according to the reflected light of the recording beam, and the first layer number information of the current first recording layer can be determined according to the second address information.

[0104] S303, determining distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer; wherein the target recording layer is the first recording layer to be read and written;

[0105] S304, controlling the movement of the recording beam according to the determined distance information so that the recording beam is focused on the target recording layer. In the process of controlling the movement of the recording beam, the distance information may be counted layer by layer to move the recording beam to the target recording layer.

[0106] For example, an optical storage medium is provided with a first wobbling groove layer and ten first recording layers on the first surface, and the target recording layer is the fifth first recording layer. In the related art, it is necessary to control the recording light beam to find the first wobbling groove layer first, and then control the recording light beam to move from the first wobbling groove layer to each first recording layer, and move to the fifth first recording layer by counting layer by layer. The layer-seeking method in the related art seeks the layer in the order of each first recording layer, the layer-seeking speed is slow, and the possibility of layer-seeking errors is high. In the layer-seeking method in the embodiment of the present application, the recording light beam can be controlled to randomly focus on a first recording layer, and the first layer number information of the current first recording layer can be obtained according to the reflected light of the recording light beam, for example, the current first recording layer is the third first recording layer. Then, the recording light beam is controlled to move two first recording layers, so that the recording light beam can be focused on the fifth first recording layer. Compared with the layer-seeking method in the related art, the layer-seeking method provided in the embodiment of the present application can realize layer-seeking according to the first layer number information of the first recording layer, so that the distance of the recording light beam moving is shorter, and the layer-seeking speed can be accelerated. Since the distance the recording light beam moves is shorter, the possibility of layer-seeking errors is smaller, thus improving the reliability of layer-seeking.

[0107] In addition, after the above step S304, the following steps may also be included:

[0108] determining again, according to the reflected light of the recording light beam, the first layer number information of the first recording layer on which the recording light beam is focused;

[0109] Based on the first layer number information of the determined first recording layer, determine whether the first recording layer on which the recording light beam is focused is the target recording layer; if the first recording layer on which the recording light beam is currently focused is not the target recording layer, redetermine the distance information between the first recording layer and the target recording layer, and control the movement of the recording light beam based on the determined distance information until the recording light beam is focused on the target recording layer.

[0110] In the embodiment of the present application, it is possible to verify whether the currently focused first recording layer is the target recording layer according to the first layer number information of the first recording layer, thereby further improving the reliability of layer seeking.

[0111] Based on the same technical concept, the embodiment of the present application also provides a layer-finding device for an optical storage medium. The layer-finding device in the embodiment of the present application may be a data writing device for the optical storage medium, or the layer-finding device in the embodiment of the present application may also be a data reading device for the optical storage medium, or the layer-finding device in the embodiment of the present application may also be a reading and writing device for the optical storage medium. For example, the layer-finding device in the embodiment of the present application may be an optical drive.

[0112] Figure 7 FIG. 1 is a schematic diagram of the structure of the layer-seeking device of the optical storage medium in the embodiment of the present application. Figure 7As shown, the layer-seeking device of the optical storage medium in the embodiment of the present application may include: a servo driver 401, which is used to control the guide beam to focus on the first wobbling groove layer, and control the recording beam synchronized with the guide beam to focus on a first recording layer. A processor 402, which is used to determine the first layer number information of the first recording layer currently focused by the recording beam according to the reflected light of the recording beam; and to determine the distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer, wherein the target recording layer is the recording layer to be read and written; the servo driver 401 is also used to control the movement of the recording beam according to the determined distance information so that the recording beam is focused on the target recording layer.

[0113] Furthermore, in some embodiments of the present application, the processor 402 may also be used for: after the servo driver controls the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer, re-determining the first layer number information of the first recording layer on which the recording light beam is focused according to the reflected light of the recording light beam; and judging whether the first recording layer currently focused on by the recording light beam is the target recording layer according to the determined layer number information of the first recording layer; if the first recording layer focused on by the recording light beam is not the target recording layer, re-determining the distance information between the first recording layer and the target recording layer, and controlling the servo driver to control the movement of the recording light beam according to the determined distance information until the recording light beam is focused on the target recording layer.

[0114] In the layer-finding device provided in the embodiment of the present application, the servo driver can control the recording light beam to randomly focus on a first recording layer, and the processor can obtain the first layer number information of the current first recording layer according to the reflected light of the recording light beam, and determine the distance information between the current first recording layer and the target recording layer, so that the servo driver can control the movement of the recording light beam according to the determined distance information, so that the recording light beam is focused on the target recording layer. In this way, layer-finding can be achieved according to the first layer number information of the first recording layer, so that the distance moved by the recording light beam is shorter, and the layer-finding speed can be accelerated. Since the distance moved by the recording light beam is shorter, the possibility of layer-finding errors is smaller, and the reliability of layer-finding is improved. In addition, the processor can also verify whether the currently focused first recording layer is the target recording layer according to the first layer number information of the first recording layer, further improving the reliability of layer-finding.

[0115] Based on the same technical concept, an embodiment of the present application further provides an electronic device, which may include: any of the above-mentioned layer-finding devices and a housing, wherein the layer-finding device is located in the housing. Exemplarily, the electronic device may be a device having a layer-finding device, such as a laptop computer, a desktop computer, or a server. Since the above-mentioned layer-finding device can realize fast layer-finding of an optical storage medium, and the reliability of layer-finding is high, the electronic device including the above-mentioned layer-finding device can realize fast reading and writing of an optical storage medium.

[0116] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0117] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, if these modifications and variations of the embodiments of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An optical storage medium, characterized in that: include: A first surface and a second surface disposed opposite to each other, and a first wobble groove layer and a multi-layer first recording layer disposed between the first surface and the second surface, wherein the multi-layer first recording layer is located between the first wobble groove layer and the first surface; The first wobble groove layer includes a plurality of first sectors, each of which carries first address information, and the first address information includes: first surface number information and first layer internal address information; the first surface number information is used to characterize the first surface, and the first layer internal address information is used to characterize position information of the first sector in the first wobble groove layer; Each of the first recording layers includes a plurality of second sectors, the position of each of the second sectors corresponds to the position of one of the first sectors, and the orthographic projection of the second sector on the first wobbled groove layer has an overlapping area with the first sector at the corresponding position; Each of the second sectors carries second address information, and the second address information includes: first layer number information and second layer address information, the first layer number information is used to represent the layer number of the first recording layer where the second sector is located, and the second layer address information is used to represent the position information of the second sector in the first recording layer.

2. The optical storage medium according to claim 1, wherein The second-layer address information of the second sector is the same as the first-layer address information of the first sector at the corresponding position.

3. The optical storage medium according to claim 1 or 2, characterized in that: The optical storage medium is a ring-shaped optical disc; The first sector includes: a first data servo area, a first lead-in area, a first user data area and a first lead-out area arranged in sequence from the inner circle to the outer circle of the optical disc; the first data servo area carries the first address information; The second sector includes: a second data servo area, a second lead-in area, a second user data area and a second lead-out area which are sequentially arranged in a direction from the inner circle to the outer circle of the optical disc; the second data servo area carries the second address information.

4. The optical storage medium according to any one of claims 1 to 3, characterized in that: Also includes: a second wobble groove layer and a multi-layer second recording layer located between the first wobble groove layer and the second surface, the multi-layer second recording layer being located between the second wobble groove and the second surface; The second wobble groove layer includes a plurality of third sectors, each of the third sectors carries third address information; The third address information includes: second surface number information and third layer internal address information; the second surface number information is used to characterize the second surface, and the third layer internal address information is used to characterize the position information of the third sector in the second wobble groove layer; Each of the second recording layers includes a plurality of fourth sectors, each of the fourth sectors is located at a position corresponding to a position of the third sector, and an orthographic projection of the fourth sector on the second wobbled groove layer has an overlapping area with the third sector at a corresponding position; Each of the fourth sectors carries fourth address information, and the fourth address information includes: the second layer number information and the address information within the fourth layer, the second layer number information is used to represent the layer number of the second recording layer where the fourth sector is located, and the address information within the fourth layer is used to represent the position information of the fourth sector in the second recording layer.

5. A method for manufacturing an optical storage medium, characterized in that: include: forming a plurality of first recording layers on a substrate, each of the first recording layers comprising a plurality of second sectors; forming a first wobble groove layer on the plurality of first recording layers, wherein the first wobble groove layer comprises a plurality of first sectors, the position of each first sector corresponds to the position of one second sector, and the orthographic projection of the second sector on the first wobble groove layer has an overlapping area with the first sector at the corresponding position; Each of the first sectors carries first address information, the first address information including: first surface number information and first layer address information; the first surface number information is used to characterize the first surface of the substrate, and the first layer address information is used to characterize the position information of the first sector in the first wobble groove layer; Second address information is written to each of the multiple second sectors of the first recording layer; the second address information includes: first layer number information and second layer address information, the first layer number information is used to represent the layer number of the first recording layer where the second sector is located, and the second layer address information is used to represent the position information of the second sector in the first recording layer.

6. The method according to claim 5, characterized in that: Writing the second address information to the plurality of second sectors of each first recording layer respectively comprises: Controlling the guide light beam to focus on the first wobble groove layer, and determining the first address information of the first sector on which the guide light beam is currently focused according to the reflected light of the guide light beam; Controlling the recording beam to focus on the first recording layer, and controlling the recording beam to be synchronized with the guide beam; determining, according to the reflected light of the recording light beam, first layer number information of the first recording layer on which the recording light beam is currently focused; Based on the determined first layer number information and the first address information of the first sector on which the guiding light beam is currently focused, the second address information of the second sector on which the recording light beam is currently focused is determined, and the determined second address information is written into the second sector on which the recording light beam is currently focused; wherein the address information within the second layer of the second sector is the same as the address information within the first layer of the corresponding first sector.

7. A layer-finding method for an optical storage medium, characterized in that: The layer-finding method is applied to the optical storage medium according to any one of claims 1 to 4; the layer-finding method comprises: Controlling the guide beam to focus on the first wobbled groove layer, and controlling the recording beam synchronized with the guide beam to focus on one layer of the first recording layer; determining, according to the reflected light of the recording light beam, first layer number information of the first recording layer on which the recording light beam is currently focused; Determine the distance information between the first recording layer and the target recording layer according to the first layer number information of the first recording layer and the layer number information of the target recording layer; the target recording layer is the first recording layer to be read and written; The recording beam is controlled to move according to the determined distance information so that the recording beam is focused on the target recording layer.

8. The layer-finding method according to claim 7, characterized in that: After controlling the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer, the method further includes: determining again, according to the reflected light of the recording light beam, the first layer number information of the first recording layer on which the recording light beam is focused; Based on the determined first layer number information of the first recording layer, determine whether the first recording layer on which the recording light beam is focused is the target recording layer; if the first recording layer on which the recording light beam is currently focused is not the target recording layer, redetermine the distance information between the first recording layer and the target recording layer, and control the movement of the recording light beam based on the determined distance information until the recording light beam is focused on the target recording layer.

9. A layer-finding device for an optical storage medium, characterized in that: The optical storage medium as claimed in any one of claims 1 to 4 comprises: A servo driver, used for controlling the guide beam to focus on the first wobble groove layer, and controlling the recording beam synchronized with the guide beam to focus on one layer of the first recording layer; a processor, configured to determine, based on the reflected light of the recording light beam, first layer number information of the first recording layer on which the recording light beam is currently focused; and to determine, based on the first layer number information of the first recording layer and layer number information of the target recording layer, distance information between the first recording layer and the target recording layer; the target recording layer is the recording layer to be read or written; The servo driver is further used to control the movement of the recording light beam according to the determined distance information so that the recording light beam is focused on the target recording layer.

10. The layer-finding device according to claim 9, characterized in that: The processor is further configured to: after the servo driver controls the recording light beam to move according to the determined distance information so that the recording light beam is focused on the target recording layer, determine again the first layer number information of the first recording layer on which the recording light beam is focused according to the reflected light of the recording light beam; Based on the determined first layer number information of the first recording layer, determine whether the first recording layer currently focused by the recording light beam is the target recording layer; if the first recording layer focused by the recording light beam is not the target recording layer, redetermine the distance information between the first recording layer and the target recording layer, and control the servo driver to control the movement of the recording light beam according to the determined distance information until the recording light beam is focused on the target recording layer.

11. An electronic device, characterized in that: include: A layer-finding device as claimed in claim 9 or 10.

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