CN101064138A - CD - Google Patents

Abstract

The invention provides an optical disc, which comprises a substrate, a groove, a first recording material layer, a reflecting layer, a second recording material layer, a protective layer and a label layer. The trench is formed on a surface of the substrate. The first recording material layer is formed and covered on the groove, the reflecting layer is formed and covered on the first recording material layer, and the second recording material layer is formed and covered on the reflecting layer. The protective layer is formed and covers the second recording material layer. The label layer is formed and covered on the protective layer, so that an area of the protective layer is exposed, and the label layer is used for enabling an optical read-write unit to form an image on the label layer. The second recording material layer is located under the exposed area of the protection layer for the optical read-write unit to record or read the information related to the image thereon.

Description

CD

technical field

The present invention relates to an optical disc, and in particular, the present invention relates to an optical disc capable of recording images on its own label layer by means of a laser beam.

Background technique

As optical disks are widely used to store data, the ensuing problem is how to manage the optical disks with stored data. Since consumers expect to have a more convenient way to identify the data they have written to their own optical discs, in the form of text (Text) and images (Figure), etc. Labeling) methods have been continuously developed. The basic method of labeling an optical disc includes physically writing on the non-data side of the optical disc with a permanent marking tool (Marker) (for example, a sharp stylus (Sharpie marker)), or printing out an adhesive label ( Paper sticker label) and stick it on the non-data side of the disc. Other physical labeling methods for implementation in conventional CD players include ink jet printing (Ink jet) (see, as disclosed in U.S. Patent No. 6,074,031 to Compulog Corporation), thermal wax transfer (Thermal wax transfer) and Thermal dye transfer (Thermal dye transfer) ... and other methods.

One of the main problems of automatic labeling of optical discs is that on the label side (the so-called non-data side), there is no pre-formed groove like the aforementioned data side, so there is no predetermined groove such as the ATIP code. Address codes are used to assist positioning, making it difficult to mark on the volume label of the disc.

In recent years, technologies for drawing images on the label surface of optical discs have been proposed, such as disclosed in U.S. Patent No. 6,864,907 obtained by Hewlett-Packard Development Company, L.P., which is the existing speed of light Write (LightScribe) technology. The content of this technology is to provide a label surface that changes color in response to light or heat on the optical disc. The label surface is set to face an optical pickup unit, a laser beam is emitted to the label surface, causing the label surface to change color to form an image, and the image formed on the label surface It can be used to identify the data content of the disc. A set of alignment marks are pre-formed on the label side to help position the image to be printed.

However, due to the material characteristics of the label surface, there is currently no way for the optical read/write unit to determine where on the label surface of the optical speed writing optical disc has been marked. When an optical disc is used to repeatedly print images on its label side, it is difficult to avoid overwriting a previously recorded image with a new image. In addition, due to the limited number of alignment marks on the label surface, the optical read-write unit needs more time for positioning when forming an image on the label surface, prolonging the time required to form an image on the label surface .

Contents of the invention

Therefore, one scope of the present invention is to provide an optical disc, which can record images on its own label layer by laser beams, and can save the use status of the label layer. When the optical disc is used to repeatedly print images on its label layer, it is possible to avoid overwriting a previously recorded image with a new image. In addition, the optical disc can effectively shorten the positioning time of the optical read-write unit and improve the efficiency of forming images on the label layer.

An optical disc according to a preferred embodiment of the present invention includes a substrate, a groove, a first recording material layer, a reflective layer, a second recording material layer, a protective layer and a label layer.

The groove is formed on one surface of the substrate, and has a plurality of position marks in the groove. And the first recording material layer is formed and covers the surface and the groove of the substrate. In addition, the reflective layer is formed and covers the first recording material layer.

Further, the second recording material layer is formed and covered on the reflective layer. Moreover, the protection layer is formed and covers the second recording material layer. In addition, the label layer is formed and covered on the protective layer, so that a region of the protective layer is exposed, and the label layer is used for an optical read-write unit to form an image thereon.

Please note that the above-mentioned second recording material layer under the exposed area of the protective layer is used for the optical read-write unit to record or read information about the image thereon. And the plurality of position marks provide the basis for the optical read-write unit to record or read information about the image on the second recording material layer.

The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings.

Description of drawings

FIG. 1A is a schematic diagram of an optical disc according to a specific embodiment of the present invention.

Fig. 1B is a cross-sectional view along line M-M in Fig. 1A.

Explanation of main component symbols

1: Disc 12: Substrate

13: Groove 14: First recording material layer

15: reflective layer 16: second recording material layer

17: Protective layer 172: Exposed area

18: label layer

Detailed ways

The invention provides an optical disc (Optical disc), and especially, the optical disc can display its preservation status through an indicating material. The specific embodiments and practical application cases of the present invention will be described in detail below, so as to fully illustrate the features, spirit and advantages of the present invention.

Please refer to FIG. 1A and FIG. 1B . FIG. 1A is a schematic diagram of an optical disc 1 according to a specific embodiment of the present invention, and FIG. 1B is a cross-sectional view along line M-M in FIG. 1A . The optical disc 1 comprises a substrate (Substrate) 12, a groove (Groove) 13, a first recording material layer (Recordable material layer) 14, a reflective layer (Reflective layer) 15, a second recording material layer 16, a A protective layer (Protective layer) 17 and a label layer (Label layer) 18.

The groove 13 is formed on a surface of the substrate 12, and has a plurality of position marks (not shown in the figure) in the groove. The first recording material layer 14 is formed and covers the surface of the substrate 12 and the groove 13 . In addition, the reflective layer 15 is formed and covers the first recording material layer 14 .

In practical applications, the first recording material layer 14 is used for an optical pick-up unit to record or read data thereon. Moreover, in practical applications, the first recording material layer 14 can be formed by a dye or a phase change material.

Further, the second recording material layer 16 is formed and covered on the reflective layer 15 , and the protective layer 17 is formed and covered on the second recording material layer 16 . The label layer 18 is formed and covered on the protection layer 17 so that a region 172 of the protection layer 17 is exposed. The label layer 18 is used for the optical read-write unit to form an image thereon. In practical application, the second recording material layer 16 can be formed by a dye or a phase change material.

Please note that, as mentioned above, the second recording material layer 16 located under the exposed area A of the protective layer 17 is used for the optical read-write unit to record or read information about the image thereon, and the multiple Position marks provide the basis for the optical read/write unit to record or read information about the image on the second recording material layer 16 . In addition, the plurality of position marks can also provide a basis for the optical read-write unit to record or read the data on the first recording material layer 14 .

In practice, the multiple location marks are the ATIP codes specified in the aforementioned "Compact Disc Recordable System Description" (Orange Book, third edition). When the optical read-write unit is instructed to form the image on the label layer, the plurality of position marks are read to locate at a specific position, thereby simplifying the addressing process of the label layer.

In addition, in this embodiment, the exposed area 172 of the protective layer 17 is located on an inner annular area (Annular region) A of the substrate. In another embodiment, the exposed area 172 of the protection layer can be located on an outer annular area of the substrate.

In a specific embodiment, the label layer has a color that can be changed in response to light energy or heat energy of a laser beam (Laser beam) emitted by the optical read-write unit to form the image.

In a specific embodiment, the structure of the optical disc according to the present invention can conform to DVD-R standard, DVD+R standard, DVD-RW standard, CD-R standard or CD-RW standard.

Obviously, by means of the above-mentioned second recording material layer, the optical disc can preserve the use state of its label layer, and when repeatedly forming an image on its label layer, it can avoid covering a previously recorded image with a new image superior. In addition, with the plurality of position marks, the addressing process of the optical read-write unit to the label layer can be simplified, and the speed at which the optical read-write unit forms an image on the label layer is significantly improved.

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the scope of the present invention. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, The scope of protection of the present invention should be defined by the scope of the appended patent application.

Claims (9)

1. A CD, comprising: Substrate; a groove, the groove is formed on a surface of the substrate, and has a plurality of position marks in the groove; a first recording material layer, the first recording material layer is formed and covered on the surface and the groove of the substrate; a reflective layer, the reflective layer is formed and covered on the first recording material layer; a second recording material layer, the second recording material layer is formed and covered on the reflective layer; a protective layer formed and covered on the second recording material layer; and a label layer, the label layer is formed and covered on the protective layer, so that a region of the protective layer is exposed, and the label layer is used to allow the optical read-write unit to form an image thereon; Wherein the second recording material layer located under the exposed area of the protective layer is used for the optical read-write unit to record or read information about the image thereon, and the plurality of position marks provide the optical read-write unit to record Or read the information about the image on the basis of the second recording material layer. 2. The optical disc as claimed in claim 1, wherein the first recording material layer is formed of dye or phase change material. 3. The optical disc as claimed in claim 1, wherein the second recording material layer is formed of dye or phase change material. 4. The optical disc as claimed in claim 1, wherein the label layer has a color which can be changed in response to light energy or thermal energy of the laser beam emitted by the optical read/write unit to form the image. 5. The optical disc as claimed in claim 1, wherein the first recording material layer is used for the optical read-write unit to record or read data thereon, and the plurality of position marks provide the optical read-write unit to record or read data. The data is taken as a basis on the first layer of recording material. 6. The optical disc according to claim 1, wherein the structure of the optical disc complies with DVD-R standard, DVD+R standard or DVD-RW standard. 7. The optical disc according to claim 1, wherein the structure of the optical disc complies with the CD-R standard or the CD-RW standard. 8. The optical disc as claimed in claim 1, wherein the exposed area of the protection layer is located on the inner annular area of the substrate. 9. The optical disc as claimed in claim 1, wherein the exposed area of the protective layer is located above the outer annular area of the substrate.

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