CN2377653Y

CN2377653Y - High compactness optic disc

Info

Publication number: CN2377653Y
Application number: CN99206428U
Authority: CN
Inventors: 孙国彰
Original assignee: Enji Science & Technology Co Ltd
Current assignee: Enji Science & Technology Co Ltd
Priority date: 1999-04-23
Filing date: 1999-04-23
Publication date: 2000-05-10
Anticipated expiration: 2009-04-23

Abstract

The utility model relates to a high density optical disc, which can record data. The optical disc at least comprises data disc tracks; a specific track distance is kept between each disc track and the adjacent disc track; a plurality of signal pits are arranged in each disc track; the periphery of each signal pit is respectively provided with a side wall. The length of the signal pit and the track distance are all reduced; the favorable shape of the signal pits is maintained in making. The signal interference is reduced; the recording density of signals is enhanced; the data storage capacity is increased; the data storage capacity of the optical disc is raised from 650MB to 1950MB equivalent to a 120-minute super video and audio optical disc; the storage capacity is greatly enhanced. The utility model has the advantages of environmental protection, unauthorized copying prevention and convenient use.

Description

The high density compact disc sheet

The utility model relates to a kind of high density compact disc sheet, particularly relates to a kind of length and gauge that utilizes signal pit on the minimizing high density compact disc sheet, and has the high density compact disc sheet of vast capacity.

(compact Disc-CD) is very high in present utilization rate for the high density compact disc sheet, but make CD disc coupled computer or TV uses, so that can demonstrate image in the computing machine or the screen of TV, and can cooperate sound, become the image and sound optical disk (VCD) that can supply the usefulness of people's ornamental film.

Since uniting in 1981, Dutch PHILIPS Co., Japanese Sony Corporation deliver Red Book, stipulate after CD Audio (the Compact Disc Digital Audio) specification, the CD discs is small and exquisite with its area, can hold the more data amount, preserve easily and advantages such as high fax tonequality, promptly replace prosperous of traditional type plastics and audiotape, and become the mainstream media in market.

Subsequently along with after the delivering in succession of specifications such as yellow book, Orange Book, white paper, the CD discs has further range of application in the storage of data, as: multimedia CD, VCD etc., technical progress along with range of application, data quantity stored also just constantly increases, and the memory capacity that makes original CD 650MB that discs has is applied use, causes a large amount of increase of CD discs of multi-disc dress.The capacity of especially super shadow discs (Super VCD-SVCD) is significantly not enough especially, because SVCD is a visual effect of asking for the high resolving power high image quality, adopt the signal compression film of 2/3 D1, make the film that the CD discs of a slice 650MB can only be held 37 minutes, and the reproduction time of general film is mostly about 100 minutes, if come the documentary data with at present existing CD discs, then need to use three CD discs just can hold so big time quantum, the quite shortcoming of inconvenience is arranged in the use.

Fig. 1 is present traditional type existing C D discs part-structure synoptic diagram.As shown in Figure 1, arrange institute regularly by several signal pits (Pit) 10 on the CD discs and form with different length, wherein signal pit 10 rule of arranging be in accordance with by the CD Red Book fixed specification.Yet, because early stage technology is also inaccurate, the signal pit 10 of made has burr 12 at its periphery and produces, this gradient of representing that promptly signal pit 10 tilts comparatively relaxes, and burr 12 can produce the phenomenon that signal disturbs when understanding, so to the decipherings that more broad could be correct of two of radiation direction (label 14 the figure) adjacent signal pits 10 distances (being gauge), so can make the data of storing in the CD discs less, for can be correctly and read signal effectively, gauge 16 with 10 of each signal pits of radiation direction 14 is decided to be 1.6 microns (μ m), at scanning disk face velocity (Scanning Velocity) is that (1.2m/s～1.4m/s), the length of signal pit 10 bit time T is 0.327 micron (as shown in fig. 1) under the 1.4m/s.

Please refer to Fig. 2, it illustrates existing general CD discs read head luminous point 18 at the sectional drawing that reads the signal pit that writes down on the existing CD discs; It is 1.4m/s that Fig. 3 illustrates the linear speed that existing CD reads, the coded system of signal pit.As shown in Figure 3, last row is a coded signal, middle row is the signal behind modulation on the glass substrate, shown in the following row is the shape of signal pit after foundation, and the laser etching chance is with the 0 and 1 continuous number signal of being formed in the coded signal, with laser it is recorded on the glass substrate, signal 1 is the identification signal that laser is bright or go out, after the glass substrate video picture, because the influence of video picture program, the signal pit wall has the slope change of inclination, and this slope changes and need finish in a unit interval T, so the variation of phase place could allow optical read head correct read judgement, and will be recorded in data decode reduction in the CD discs, still, the combination of said structure in use but just like after shortcoming remain to be improved:

1, the data that can store in the CD discs are less: because of existing its data capacity of CD discs only has 650MB (can play 74 minutes), SVCD can play only 37 minutes, if the time that audio-visual CD need be play is 100 minutes, then needs three SVCD discs to store and finish.

2, do not have environment-friendly function:,, promptly can cause the pollution on the environment so the discarded object that can produce is more because the essential consumptive material that uses is more.

3, do not have suitable antitheft copy function: generally some people can compress by software, or the mode pirate that duplicates by CD writers (CD writer), and forgery production that can be a large amount of.

The existing CD discs practicality of above-mentioned traditional type is not good, and in addition improved necessity is arranged in fact.The utility model people at above-mentioned existing CD discs can increase Material Cost, production cost is deeply conceived as for shortcomings such as increasing resource consumptions, and active research improves, and develops, designs the utility model through long-term endeavour, trial-production.

The purpose of this utility model is to provide a kind of modified high density CD discs, the length and the gauge of the signal pit on the CD discs (Pit) are all dwindled, the excellent in shape of signal is kept in friendship on manufacture craft, reduce signal pit interference and erroneous judgement each other, can be at present specific high density compact disc normally use or play, have and to increase substantially memory capacity, have environment-friendly function, can prevent pirate and easy to use.

The purpose of this utility model is such realization, and a kind of high density compact disc sheet promptly is provided, and in order to record data, comprises at least on this discs: the data disks rail, possess a specific gauge between each this dish rail and the adjacent disc rail; Have several signal pits in each dish rail; And respectively has a sidewall at the periphery of this each signal pit.

This practicality also provides a kind of high density compact disc sheet, in order to record data, comprises at least on this discs: several coil rail, possess a specific gauge between each this dish rail and the adjacent disc rail, about 0.9 micron of this gauge; Have several signal pits in each dish rail; And respectively has a sidewall at the periphery of this each signal pit.

The utility model also provides a kind of high density compact disc sheet, in order to record data, comprises at least on this discs: several coil rail, possess about 0.9 a micron gauge between each this dish rail and the adjacent disc rail; Each this respectively coil and have several signal pits in the rail, wherein the length of this each signal pit is about 0.486～1.800 micron; And respectively have length at the periphery of this each signal pit and be not more than a sidewall of 0.162 micron.

Wherein the size of gauge is about the 0.8-1.0 micron.

Wherein have at least the length of a signal pit to be about 0.486 micron.

Come record data with the utility model, not only reduce production costs, also increased the convenience of using, still can significantly improve the density of signal and reach the lifting of storing on the data capacity, can make the data capacity of storage effectively rise to 1950MB (222 minutes) by 650MB (37 minutes SVCD).

Below in conjunction with accompanying drawing, describe embodiment of the present utility model in detail, wherein:

Fig. 1 is the present present CD discs part-structure synoptic diagram of traditional type;

Fig. 2 is reading the sectional drawing that has the mark hole of writing down on the CD discs now for existing general CD discs read head luminous point;

Fig. 3 is 1.4m/s for the linear speed that existing CD reads, the coded system figure of signal pit;

Fig. 4 is the utility model one preferred embodiment, a kind of part-structure synoptic diagram of improvement type high density compact disc sheet;

Fig. 5 is the utility model one preferred embodiment, with the discs read head luminous point 30 of the utility model specification at the sectional drawing that is reading the signal pit that writes down on the existing CD discs;

Fig. 6 is the utility model one preferred embodiment, the coded system figure of signal pit.

Please refer to Fig. 4, it is shown according to a preferred embodiment of the present utility model a kind of part-structure synoptic diagram of modified high density CD discs.

The utility model mainly is effectively to improve the data capacity of CD discs, can read and play at present existing specific high density compact disc machine again, so putting before this, must will improve the density of data pits on discs.Please refer to Fig. 4, the utility model is the raising by the manufacture craft ability, can improve the structure of each signal pit 20 and the gradient of sidewall 24 effectively, can reduce probability interfering with each other between reading device erroneous judgement and the signal pit 20 safely, and then can shorten the gauge 22 of each signal pit 20 that is positioned at radiation direction and the length of unit interval T, in order to reach the purpose that can improve data capacity.

When effectively improving data capacity,, so must fetch data by specific high density compact disc is machine-readable because of its specification has exceeded the read range of general CD disc record.And specification of the present utility model is as shown in subordinate list one:

Accompanying drawing one: specification

Chinese	English	Explanation	Existing	Utility model
Chinese	English	Explanation	Existing	Utility model	Reading rate	Scanning Velocity	CD player reads	1.2m/s～ 1.4m/s	0.7m/s- 1.19m/s
Gauge	Track Pitch	Distance between two rails	1.5～ 1.7μm	0.9～ 1.49μm	Reading rate	Scanning Velocity	CD player reads	1.2m/s～ 1.4m/s	0.7m/s- 1.19m/s
Gauge	Track Pitch	Distance between two rails	1.5～ 1.7μm	0.9～ 1.49μm	Maximum data scope diameter	Maximum Information Diameter	Allowed maximum data scope diameter on CD	MID≤ 116nm	120nm＞MID ＞116nm
Follow the rail ability	Push Pull	The signal of being followed during reading of data	0.04≤pp ≤0.07	pp≤0.04	Maximum data scope diameter	Maximum Information Diameter	Allowed maximum data scope diameter on CD	MID≤ 116nm	120nm＞MID ＞116nm
Follow the rail ability	Push Pull	The signal of being followed during reading of data	0.04≤pp ≤0.07	pp≤0.04	Undesired signal	Cross Talk	During reading of data disturbed signal	XT≤50％	XT＞50％

Fig. 5 is according to the utility model one preferred embodiment, with the discs read head luminous point 26 of the utility model specification in the sectional drawing that reads the signal pit that writes down on the existing CD discs.Please refer to Fig. 5, in order to the details that illustrates that gauge can shorten, as shown in Figure 5, sidewall 24 gradients that wherein are positioned at signal pit 20 peripheries are comparatively precipitous, under the immovable situation of reading device, the laser that read head throwed reads luminous point 26 for 1.2 microns of diameters, after gauge 22 is foreshortened to 0.9 micron from 1.6 microns, still can not influence the regular event of read head.

Shown in Fig. 4 and Fig. 6, aspect the contraction in length of signal pit 20, the utility model can be through the improvement of manufacture craft, sidewall 24 tilt conditions of signal pit 20 are effectively improved, can make the gradient of signal pit 20 peripheral side wall 24 change into more precipitous, so can effectively shorten the length of signal pit 20, and the gauge 22 that is positioned between radiation direction 28 adjacent two signal pits is dwindled, can make the correct interpretation data of reading device again.By the numerical value that Fig. 6 provided, the length that can estimate unit interval T is about about 0.162 micron, and promptly the width of sidewall 24 will can be greater than 0.162 micron.The length of signal pit 20 of the present utility model changes according to the difference of data, deposit a hyte (Byte) on the general CD and must use 11 bits (Bit), therefore the length range of signal pit is about 0.486～1.800 micron, has at least the length of a signal pit to be about 0.486 micron.

High density compact disc sheet of the present utility model; its data capacity reaches as high as about 2.0GB; the discs storage volume much higher (three times of capacity) of the 650MB that commonly uses compared to traditional type; and to can effectively checking with the general mood of CD player pirate CD discs at present; prevent counterfeit purpose in order to reach, with the Wise property of protection author creation.

By above-mentioned the utility model preferred embodiment as can be known, application the utlity model has following advantage:

1, storage volume can significantly improve: with a CD movie film, 90 minutes time span needs three existing discs the film compacting could be published, and discs of the present utility model only needs a slice to get final product complete it is included wherein, the raw material of two CDs can be saved, and scribing of two mother matrixs can be saved.

2, has environment-friendly function: owing to increase the capacity of storage, the consumptive material of relative made palpus usefulness reduces, producing discarded object also can significantly reduce, under the situation that environmental consciousness is strengthened, for advocating the modern science and technology world that resource reclaims, be worth a large amount of modified high density compact disc sheets that use this type.

3, has good anti-pirate function: because the improvement type discs is different with the existing discs specification of traditional type; the mode of design is not to compress by software; so general user can't be by duplicating around the record machine; the midget plant of technology difference also can't be a large amount of forgery and production; make security significantly to improve; in today that promotion protects the intellectual property, the highdensity discs of this kind modified can be used on the publication of various image and sound optical disk (VCD, SVCD) in a large number.

Claims

1, a kind of high density compact disc sheet in order to record data, is characterized in that, comprises at least on this discs: the data disks rail, possess a specific gauge between each this dish rail and the adjacent disc rail; Have several signal pits in each dish rail; And respectively has a sidewall at the periphery of this each signal pit.

2, high density compact disc sheet as claimed in claim 1 is characterized in that, this gauge is about 0.9 micron.

3, high density compact disc sheet as claimed in claim 1 is characterized in that, the length of this each signal pit is about 0.480～1.800 micron.

4, high density compact disc sheet as claimed in claim 1 is characterized in that, the length of this sidewall is not more than 0.162 micron.

5, a kind of high density compact disc sheet in order to record data, is characterized in that, comprises at least on this discs: several coil rail, possess a specific gauge between each this dish rail and the adjacent disc rail, about 0.9 micron of this gauge; Have several signal pits in each dish rail; And respectively has a sidewall at the periphery of this each signal pit.

6, high density compact disc sheet as claimed in claim 5 is characterized in that, the length of this each signal pit is about 0.486～1.800 micron.

7, high density compact disc sheet as claimed in claim 5 is characterized in that, the length of this sidewall is not more than 0.162 micron.

8, a kind of high density compact disc sheet in order to record data, is characterized in that, comprises at least on this discs: several coil rail, possess about 0.9 a micron gauge between each this dish rail and the adjacent disc rail; Each this respectively coil and have several signal pits in the rail, wherein the length of this each signal pit is about 0.486～1.800 micron; And respectively have length at the periphery of this each signal pit and be not more than a sidewall of 0.162 micron.