Data storage medium and manufacturing method thereof, data storage medium, data read out apparatus and data read out method

Patent metadata

Field	Value
Publication number	US-10380470-B2
Application number	US-201615575732-A
Country	US
Kind code	B2
Filing date	Sep 16, 2016
Priority date	Sep 18, 2015
Publication date	Aug 13, 2019
Grant date	Aug 13, 2019

Abstract

A data storage medium includes a convexoconcave structure formed in a storage area which is set on a first surface of a quartz glass substrate. The storage area includes a plurality of unit storage areas which are arrayed at least in one direction, and non-data storage areas which are disposed between the unit storage areas, which are adjacent to each other. The convexoconcave structure includes unit data patterns, address patterns and boundary patterns. The unit data patterns are formed in the plurality of unit storage areas respectively in the array sequence of the unit storage areas, and the address patterns are formed in the non-data storage areas so as to correspond to each of the unit storage areas in which the unit data patterns are formed respectively.

First claim

The invention claimed is:

1. A data storage medium in which data is stored, the medium comprising:
a substrate constituted by quartz, and having a first surface and a second surface facing the first surface; and
a convexoconcave structure formed in a storage area which is set on the first surface of the substrate, wherein
the storage area includes a plurality of unit storage areas which are arrayed at least in one direction, and non-data storage areas which are disposed between the unit storage areas which are adjacent to each other,
the convexoconcave structure includes a plurality of unit data patterns which are constituted by concave pattern and convex pattern indicating a unit bit string of a plurality of unit data acquired by dividing the data, address patterns which indicate respective position information of the plurality of unit storage areas in the storage area, and boundary patterns which indicate the boundary of the unit storage areas which are adjacent to each other,
only each of the plurality of unit data patterns is formed in each of the plurality of unit storage areas in an array sequence of the plurality of unit storage areas, and
the address patterns are formed in the non-data storage areas so as to correspond to the plurality of unit storage areas respectively, in which the plurality of unit data patterns are formed respectively.

2. The data storage medium according to claim 1 , wherein at least the unit data patterns are disposed so as to overlap with an intersection of virtual grids when the virtual grid is set in the storage area.

3. The data storage medium according to claim 1 , wherein the unit data pattern and the address pattern substantially have the same dimensions.

4. The data storage medium according to claim 1 , wherein
the plurality of unit storage areas are arrayed in an M rows×N columns matrix (one of M and N is 2 or greater integer, and the other is 1 or greater integer) in the storage area, and
the address pattern is constituted by a convexoconcave structure, which indicates an array position of each unit storage area in the pth row (p is an integer of 1≤p≤M) and the qth column (q is an integer of 1≤q≤N).

5. A data read out apparatus reading out data stored in the data storage medium according to claim 1 , the apparatus comprising:
an image data acquisition unit configured to acquire a plurality of image data including the plurality of unit storage areas and the address pattern which indicates position information of each of the plurality of unit storage areas;
a data read out unit configured to read out the unit data from the image data, based on the unit data pattern which is formed in each of the plurality of unit storage areas;
a position information read out unit configured to read out the position information of each of the unit storage areas from the image data, based on the address pattern formed in the non-data storage area;
a storage unit configured to store in association with each other the unit data read out by the data read out unit and the position information of the unit storage area; and
data restoration unit configured to restore the data, based on the plurality of unit data which has been read out by the data read out unit.

6. A data read out method of reading out data stored in the data storage medium according to claim 1 , the method comprising:
a step of acquiring a plurality of image data including the plurality of unit storage areas and the address pattern which indicates position information of each of the plurality of unit storage areas;
a step of reading out the unit data from the image data, based on the unit data pattern formed in each of the plurality of unit storage areas;
a step of reading out the position information of each of the unit storage areas from the image data, based on the address pattern formed in the non-data storage area;
a step of storing in association with each other the unit data and the position information of the unit storage area; and
a step of restoring the data, based on the plurality of unit data.

7. The data read out method according to claim 6 , further comprising:
a step of determining whether reading of the unit data is possible or not from the image data, based on the unit data pattern formed in the unit storage area; and
a step of generating error data when the reading of the unit data is determined impossible, wherein
in the step of reading the unit data, the unit data is read out based on the unit data pattern when reading of the unit data is determined possible, and
in the step of storing, the unit data and the corresponding position information of the unit storage area, or the error data and the position information of the unit storage area, are stored in association with each other.

8. The data read out method according to claim 7 , further comprising a step of acquiring, when the error data is stored, based on the position information of the unit storage area stored in association with the error data, image data including the unit storage area, which is specified by the address pattern indicating position information that is the same as the position information in a reproduction of the data storage medium.

9. A data storage medium in which data is stored, the medium comprising:
a substrate constituted by quartz, and having a first surface and a second surface facing the first surface;
a data pattern which is formed in a rectangular storage area defined on the first surface of the substrate, and expresses a data bit string of the data by a physical structure corresponding to each bit of the data bit string; and
an arrangement direction index mark which is disposed on the first surface of the substrate so as to correspond to the storage area, and indicates information on an arrangement direction of the data bit string expressed by the physical structure of the data pattern formed in the storage area, wherein
the arrangement direction index mark is disposed in a position which enables specifying the arrangement direction of the data bit string expressed by the physical structure of the data pattern.

10. The data storage medium according to claim 9 , wherein
a plurality of storage areas disposed in a matrix are defined on the first surface of the substrate,
in each of the plurality of storage areas, a unit data pattern, which expresses each data bit string of a plurality of unit data acquired by dividing the data, by using a unit physical structure corresponding to each bit of the data bit string, is formed, and
the arrangement direction index mark corresponds to each of the plurality of storage areas, and is disposed in a position which enables specifying an arrangement direction of the data bit string of the unit data expressed by the unit physical structure of the unit data pattern, which is formed in each of the plurality of storage areas.

11. The data storage medium according to claim 9 , wherein the arrangement direction index mark is disposed in a position where an overall shape of the storage area and the arrangement direction mark is not symmetric.

12. The data storage medium according to claim 9 , wherein the arrangement direction index mark is disposed in an area outside the storage area.

13. The data storage medium according to claim 9 , wherein the arrangement direction index mark is disposed inside the storage area.

14. The data storage medium according to claim 9 , wherein the physical structure is constituted by a concave portion and a convex portion corresponding to each bit of the data bit string.

15. The data storage medium according to claim 14 , wherein the arrange

Assignees

• Dainippon Printing Co Ltd

Inventors

• Nakata Naoko
• Oda Hirokazu
• Aritsuka Yuki

Classifications

• G11B7/26

  Apparatus or processes specially adapted for the manufacture of record carriers · CPC title

• G11B7/2531

  comprising glass · CPC title

• G11B7/24097

  Structures for detection, control, recording operation or replay operation; Special shapes or structures for centering or eccentricity prevention (within laminated discs G11B7/24021); Arrangements for testing, inspecting or evaluating; Containers, cartridges or cassettes · CPC title

• G11B7/24091

  Combinations of pits and tracks with specific interrelation · CPC title

• G11B7/007 Primary

  Arrangement of the information on the record carrier, e.g. form of tracks {, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track} · CPC title