WO2005045816A1

WO2005045816A1 - Small-sized optical disk for data storing and reading

Info

Publication number: WO2005045816A1
Application number: PCT/CN2004/000678
Authority: WO
Inventors: Mali Gong; Lei Huang; Longfa Pan; Yuan Yao; Min Lu; Shurong Ma
Original assignee: Tsinghua University; Chengdu Tosun Science And Technology Development Ltd.
Priority date: 2003-06-23
Filing date: 2004-06-23
Publication date: 2005-05-19
Also published as: CN1224028C; CN1457052A

Abstract

The invention relates to a small-sized optical disk for data storing and reading, which belongs to high-density digital optical storing technical field. The small-sized optical disk including a positioning hole in the rotation center of the disk, a substrate layer, a covering layer and an information recording layer. The substrate layer, the covering layer and the information-recording layer are overriding. The disk has a diameter of 5mm-76mm, the positioning hole has a diameter of O.1 mm-15mm. The thickness of the disk is 0.2mm-1.3mm, in which the thickness of the covering layer may be O.Olrnm-l.Omm. The small-sized optical disk of the invention has smaller area than the conventional disk, therefore sufficiently supports the potential development of storing. It can be a read-only optical disk, a write-once optical disk, a rewritable optical disk, and so on, which is used in optical information pickup/recording apparatus or other information pickup/recording mechanism adapting for the disk to store and read data.

Description

TECHNICAL FIELD

The present invention relates to a small-sized optical disc for data storage and reading, and belongs to the field of high-density digital optical storage technology, and particularly relates to a portable optical storage technology.

Background technique

Optical disk storage is one of the main means of high-density information storage. Compared with traditional storage media such as magnetic disks and magnetic tapes, optical disks have the advantages of large storage capacity, low production costs, no fear of magnetism and heat, long life, replaceability, easy distribution, and easy damage. Data recorded on optical discs can be stored for decades, so it can replace floppy disks for software storage, magnetic tapes for long-term storage of documents and data, and so on. The advent of high-density recordable optical disks and rewritable optical disk storage has further expanded the application range of optical disk storage technologies, and can completely replace floppy disks and tapes in terms of exchange, publishing, distribution, presentation, recording, and archiving.

In recent years, with the rapid development of related technologies such as the information industry, multimedia technology, electronics, and precision processing, higher and higher requirements have been placed on the capacity, volume, and portability of optical discs. At present, the capacity of a single-sided DVD-R disc of 120 mm has reached 4.7 GB, which can basically meet the capacity requirements of general data storage. According to the existing international standards for various optical disc storage, whether it is a CD disc or a DVD disc, whether it is a 120 mm diameter disc or an 80 hidden diameter disc, to a certain extent, because of its large size, it is not Suitable for use as a portable mobile storage.

Taking an existing ordinary size optical disc as an example, as shown in FIG. 1, for any existing 80 mm optical disc, it can be seen that the optical disc is composed of a base layer 6 and an information layer (mainly composed of a transition area 2 and a lead-in area 3). , Data area 4, lead-out area 5, etc.), cover layer 7. In the information layer of the optical disc, from the center of the disc to a diameter of 44 mm, according to different functions, it can be divided into several areas, including a central hole 1 (diameter 15 mm) and a transition area 2, where the transition area includes : First transition zone (diameter 15 mm-16 mm), second transition zone (diameter 16 mm-22 mm), clamping zone (diameter 22 mm ~ 33 mm), third transition zone (diameter 33 mm ~ 44 mm) ). From the end of the third transition area (44 mm in diameter) to the outer edge of the disc (77 mm in diameter), it is the information area of the disc. According to different functions, the information area of the optical disc is further divided into three areas, namely the lead-in area 3 (diameter 44.6 mm ~ 48 mm), data area 4 (diameter 48 mm to 76 mm), and lead-out area 5 (diameter 76 mm to 77 mm). In the lead-in area, control information, publishing information, copyright content, and the like of the optical disc are mainly recorded; various user data can be stored and recorded in the data area; the lead-out area is an area to ensure that the disc can continuously and smoothly read data. From the lead-out area to the outermost edge of the disc (80 mm in diameter), it is not considered for data storage or other uses.

It can be seen from FIG. 1 that the conventional large-size optical disc is too large because it does not consider whether the disc is suitable for portable equipment. In the new generation of optical disc products and other consumer electronics products, no matter how small the size of the hardware product is, the overall size of the product is still large after adding the large-size optical disc, so it cannot meet the requirements of portable.

Summary of the invention

The object of the present invention is to propose a small-sized optical disc for data storage and reading. By reducing the mechanical size of the optical disc, the portability of the optical disc can be fully exerted, the cost of the optical disc can be reduced, and the application field and role of the optical disc can be improved. To meet users' requirements for portable storage.

The small-sized optical disk for data storage and reading provided by the present invention includes a positioning hole, a base layer, a cover layer, and an information recording layer. The positioning hole is provided at the rotation center of the optical disk, the base layer, the information recording layer, and the cover layer. 1 mm-15 mm。 The diameter of the disc is 5 mm ~ 76 mm, the positioning 孑 L is 0.1 mm-15 mm.

The thickness of the above-mentioned small-sized optical disc may be 0.2 mm to 1.3 mm, and the thickness of the cover layer may be 0.01 mm to 1.0 mm.

The information recording layer of the above-mentioned small-sized optical disc is a transition area, a lead-in area, a data area, and a lead-out area in order from the positioning hole to the periphery, or an information recording layer is a lead-in area, data area, and lead-out area in order from the positioning hole to the periphery of the circle. It can be all data area from the positioning hole to the circumference of the garden.

The data area of the aforementioned small-sized optical disc is engraved with closely arranged circular information tracks or spiral information tracks.

The above-mentioned small-sized optical disc may further include a decoration area, and the decoration area is provided on the periphery of the optical disk. The decoration area may be a square, a circle, or any other geometric shape.

The small-sized optical disc for data storage and reading proposed by the present invention includes: The effective data storage area has a diameter between 5 mm and 76 mm. It can be a read-only optical disc, a write-once optical disc, or a multi-erasable optical disc for data storage and reading. An optical information pickup / recording device of an optical disc drive or other information pickup / recording mechanism.

Because the new-type small-size optical disk for data storage and reading provided by the present invention has a smaller area than ordinary optical disks, it has sufficient storage development potential and can be applied to various products that require external memory. For example, it can be applied to other personal digital portable consumer electronics products, such as Walkman, Walkman, E-Book, Mobile Phone, PDA, Notebook, Digital / Camera Camcorder, etc., becoming an efficient and reliable external storage means for these products, thus occupying more For the vast consumer electronics market.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view of a conventional conventional optical disc.

FIG. 2 is a schematic cross-sectional view of a small-sized optical disc designed by the present invention.

3 to 8 are schematic structural diagrams of an embodiment of the present invention.

In Figures 1 to 8, 1 is a positioning hole, 2 is a transition area, 3 is a lead-in area, 4 is a data area, 5 is a lead-out area, 6 is a base layer, 7 is a cover layer, 8 is a concentric circular track, 9 Is a spiral track, 10 is the decorative area in the disc, 11 is the information area in the disc, HI is the thickness of the cover layer, H 2 is the total thickness of the disc, D 1 is the diameter of the positioning hole, and D 2 Is the outer diameter of the disc.

detailed description

The structure of the small-sized optical disc for data storage and reading designed by the present invention is shown in FIG. 1 and includes a positioning hole 1, a base layer 6, a cover layer 7, and an information recording layer. The positioning hole 1 is provided in The center of rotation of the disc, the base layer 6, the middle information recording layer and the cover layer 7 are laminated on each other in sequence. The diameter of the disc D2 can be 5 mm to 7 6 mm, and the diameter D1 of the positioning hole 1 can be 0. . 1 mm to 15 mm. The thickness H 2 of the above-mentioned optical disc may be 0.2 mm to 1.3 mm, and the thickness HI of the optical disc cover layer may be 0.1 to 1 mm to 1. 0 mm. For the above-mentioned small-sized optical disc, the information recording layer from the positioning hole 1 to the periphery of the park is in turn a transition area 2, a lead-in area 3, a data area 4, and a lead-out area 5, as shown in FIG. The information recording layer may also be a lead-in area 3, a data area 4 and a lead-out area 5 in order from the positioning hole 1 to the periphery of the park, as shown in FIG. 3. The information recording layer can also be the data area 4 from the positioning hole 1 to the circumference of the garden, as shown in FIG. 4. In the above-mentioned small-sized optical disc, a data area in which a closely arranged circular information track 8 is engraved is shown in FIG. 5, and a spiral information track may also be engraved as shown in FIG. 6. The small-sized optical disc may further include a decoration area 10, which is located on the periphery of the optical disk. The decoration area may be a square, as shown in FIG. 7; it may also be circular, or any other geometric shape. Figure 8 shows a heart shape. As shown in FIG. 2, for an optical disc with an outer diameter between 5 mm and 76 mm proposed by the present invention, starting from the center of the disc, like an ordinary optical disc shown in FIG. 1, according to different functions, It can be divided into several areas, including the central hole 1, transition area 2 (consisting of the first transition area, the second transition area, the clamping area, the third transition area, etc.). Similarly, from the end of the third transition area to the outer edge of the optical disc is the information area of the optical disc. According to different functions, the information area of the optical disc is further divided into three areas, namely a lead-in area 3, a data area 4 and a lead-out area 5. In the lead-in area, control information, publishing information, copyright content, and the like of the optical disc are mainly recorded; various user data can be stored and recorded in the data area; the lead-out area is an area to ensure that the optical disc can continuously and smoothly read data. From the lead-out area to the outermost edge of the disc is not considered for data storage or other uses.

Depending on the size of the disc, the above sizes can be different. For example, for a disc with an outer diameter of 60 mm, you can set the diameter of the center hole to 15 mm, the diameter of the first transition area to 15 mm to 16 mm, the diameter of the second transition area to 16 mm to 22 mm, and the Diameter 22 mm-33 mm, diameter of the third transition area 33 mm-44 mm, diameter of the lead-in area 44.6 mm ~ 48 mm, diameter of the data area 48 mm ~ 56 mm, diameter of the lead-out area 56 mm ~ 57 mm . 04 000678 Obviously, the optical disc set as above is applicable to any existing optical disc drive for information recording and reproduction. However, considering that the size setting may make the capacity of the disc insufficient, especially when the outer diameter of the disc is less than 44 mm, the effective data storage area in the disc will not exist. Therefore, the present invention indicates the proposed small size The various disc sizes of an optical disc can vary. For example, for a disc with an outer diameter of 44 mm, you can set the diameter of the center hole to 5 mm, the diameter of the first transition area to 5 sides to 6 mm, and the diameter of the second transition area to 6 mm to 8. 8 mm to 10 mm, the diameter of the third transition area is 10 mm to 11 mm, the diameter of the lead-in area is 11 mm to 12 miiu, the diameter of the data area is 13 mm to 41 mm, and the diameter of the lead-out area is 41 mm to 42 mm. Among them, the first transition area, the second transition area, and the third transition area may not be required according to different requirements. For some optical disc reading / recording devices, the size of the center hole and the clamping area may also be small; For some optical disc reading / recording devices, the optical disc information area may no longer be divided into a lead-in area, a data area, and a lead-out area. In this way, the entire space of the disc information area originally composed of the lead-in area, the data area, and the lead-out area can be used as an effective data storage area for storing and recording various user data. Similarly, from the information area to the outermost edge of the optical disc, it is not considered as data storage, but it can also be used for other purposes, such as fixing and holding the disc. Therefore, for the new small-sized optical disc proposed by the present invention, due to the variability of the disc structure, the storage capacity of the disc can be increased to a certain extent. For example, for a disc with an outer diameter of 44 mm, if the diameter of the center hole is set to 5 mm, the diameter of the transition area is 5 mm to 6 mm, the diameter of the clip area is 8 mm to 7 mm, and the diameter of the data area is 7 mm. -42 II. If the disc adopts the CD disc standard in the micro-physical structure, the capacity of the 44 hidden small-size CD disc can reach 120 MB; if the disc adopts the DVD disc standard in the micro-physical structure, the capacity of the 44 mm small-size DVD disc can be Reaching 870 GB. Comparing FIG. 1 and FIG. 2, it can be seen that the small-sized optical disc proposed by the present invention is smaller than the ordinary optical disc, and its portability is greatly improved. Under certain conditions, small discs can also There are changes to the disc structure to accommodate new data reading and recording requirements. According to different application fields, the disc thickness of the small-sized optical disc proposed by the present invention may be between 0.2 mm and 3 mm, for example, 1.2 mm; the outer diameter of the disc is between 5 mm and 76 mm. 6 mm。 Example, mouth 70 mm; the thickness of the cover layer is between 0.01 mm ~ 1.3 mm, example ^ mouth 0. 6 mm. Since the embodiments of the small-sized optical disc all have the structure of the base layer, the information layer, and the cover layer shown in FIG. 2, they are not specifically described in the embodiments described below. FIG. 3 is an embodiment of the present invention. The outermost edge of the optical disc is the lead-out area 5, the innermost circle of the optical disc is the lead-in area 3, and the data area 4 is between the lead-in area and the lead-out area. Writing or reading is performed at the outermost periphery. FIG. 4 shows still another embodiment of the present invention. There is no lead-in area and lead-out area in the optical disc, and only the data area 4. Data can be written or read from the outermost periphery to the innermost periphery, or from the innermost periphery to the innermost periphery. Writing or reading is performed at the outermost periphery. In this way, the entire area of the disc information area is a data area, which can be used to store and record various user data. Similarly, from the information area to the outermost edge of the optical disc, it is not considered as data storage, but it can also be used for other purposes, such as fixing and holding the disc. FIG. 5 is a schematic diagram showing the distribution of circular information tracks of a small-sized optical disc designed according to the present invention. As shown in the figure, in the information layer of the small-size optical disc proposed by the present invention, the information tracks in the lead-in area, data area, and lead-out area are concentric circular tracks 8 of different diameters with the center of the disc as the center. All data information is stored on these circular information tracks. FIG. 6 is a schematic diagram showing the distribution of spiral information tracks of a small-sized optical disc. As shown in the figure, in the information layer of the small-size optical disc proposed by the present invention, the information tracks in the lead-in area, data area, and lead-out area are closely arranged spiral tracks 9. All data information is stored on these spiral information tracks. FIG. 7 shows an embodiment in which the external shape of the small-sized optical disc is rectangular. As shown in the figure, the small-sized optical disc in this embodiment has a rectangular shape, where 1 is a positioning hole, area 10 is a decorative area in the disc, and area 11 is an information area in the disc. FIG. 8 shows an embodiment in which the external shape of the small-sized optical disc is an arbitrary shape. As shown in the figure, the shape of the small-sized optical disc in this embodiment is approximately a heart shape, where 1 is a positioning hole, area 10 is a decorative area in the disc, and area 11 is an information area in the disc. The small-sized optical disc of the present invention mentioned above, wherein the outer diameter of the effective data storage area is between 5 mm and 76 mm, and may be a read-only optical disc, a write-once optical disc, or a multiple-time optical disc. Erase / rewrite discs and more. Since the size of the small-size optical disc proposed by the present invention is smaller than that of a general 120 mm optical disc, it has better portability.

Claims

Rights request

1. A small-sized optical disc for data storage and reading, characterized in that the optical disc includes a positioning hole, a base layer, a cover layer and an information recording layer, wherein the positioning hole is provided at a rotation center of the optical disk, and the base layer 1. The information recording layer and the cover layer are laminated on top of each other in order, the diameter of the disc is 5 mm to 76 mm, and the diameter of the positioning hole is 0.1 mm to 15 mm.

2. The small-sized optical disc according to claim 1, wherein the thickness of the optical disc is 0.2 m ~ 1.3 m

3. The small-sized optical disc according to claim 1, wherein the thickness of the cover layer is 0.01 mm to 1.0 mm.

4. The small-sized optical disc according to claim 1, wherein the information recording layer is a transition area, a lead-in area, a data area, and a lead-out area in order from the positioning hole to the periphery of the park.

5. The small-size optical disc according to claim 1, wherein the information recording layer is a lead-in area, a data area, and a lead-out area in order from the positioning hole to the periphery of the park.

6. The small-sized optical disc according to claim 1, wherein the information recording layer is a data area from the positioning hole to the periphery of the circle.

7. The small-sized optical disc according to claim 3, wherein the data area is engraved with a closely arranged circular information track or spiral information track.

8. The small-sized optical disc according to claim 4, wherein the data area is engraved with a closely arranged circular information track or spiral information track.

9. The small-size optical disc according to claim 5, wherein the data area is engraved with a closely arranged circular information track or spiral information track.

10. The small-sized optical disc according to claim 1, wherein the optical disc further comprises: It includes a decoration area. The decoration area is arranged on the periphery of the optical disc. The decoration area is a square, a circle, or any other geometric shape.