KR19980035089U - Compact discs with scratch shield - Google Patents
Compact discs with scratch shield Download PDFInfo
- Publication number
- KR19980035089U KR19980035089U KR2019960048059U KR19960048059U KR19980035089U KR 19980035089 U KR19980035089 U KR 19980035089U KR 2019960048059 U KR2019960048059 U KR 2019960048059U KR 19960048059 U KR19960048059 U KR 19960048059U KR 19980035089 U KR19980035089 U KR 19980035089U
- Authority
- KR
- South Korea
- Prior art keywords
- scratch
- protective film
- film
- present
- compact disk
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/2403—Layers; Shape, structure or physical properties thereof
- G11B7/24053—Protective topcoat layers lying opposite to the light entrance side, e.g. layers for preventing electrostatic charging
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/254—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers
- G11B2007/25402—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of protective topcoat layers consisting essentially of organic resins
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2537—Optical discs
- G11B2220/2545—CDs
Abstract
본 고안은 컴팩트 디스크 표면에 보호막을 입혀 스크래치(Scratch)를 방지할 수 있도록 한 스크래치 보호막을 갖는 컴팩트 디스크에 관한 것이다.The present invention relates to a compact disk having a scratch protective film to prevent scratches by applying a protective film on the surface of the compact disk.
본 고안은 라벨(1), 보호막(2), 플랫부(3a)와 데이터가 기록되어 있는 핏트부(3b)로 이루어진 반사막(3), 투명 플라스틱(4)으로 형성되는 CD에 있어서, 상기 투명 플라스틱(4) 하층에 스크래치 방지를 위한 스크래치 방지용 보호막(5)을 약 0.2㎜두께의 폴리카보네이트 필름을 이용하여 형성하므로써 CD 표면의 스크래치를 방지할 수 있도록 하여 CD의 수명 연장 및 좋은 음질을 유지할 수 있도록 한 것이다.The present invention is made of a label (1), a protective film (2), a flat portion (3a) and a reflective film (3) consisting of a fitting portion (3b) on which data is recorded, and a CD formed of a transparent plastic (4), wherein the transparent The scratch protection film 5 for scratch prevention is formed on the lower layer of the plastic 4 by using a polycarbonate film having a thickness of about 0.2 mm so that scratches on the surface of the CD can be prevented, thereby extending the life of the CD and maintaining good sound quality. It would be.
Description
본 고안은 컴팩트 디스크(이하, CD라 칭함) 표면에 보호막을 입혀 스크래치(Scratch)를 방지할 수 있도록 한 스크래치 보호막을 갖는 컴팩트 디스크에 관한 것이다.The present invention relates to a compact disk having a scratch protective film to prevent scratches by applying a protective film on the surface of the compact disk (hereinafter referred to as CD).
현재 CD는 저장의 편리함과 좋은 음질로 인하여 대중화되어 있다.Nowadays CDs are popular due to the convenience of storage and good sound quality.
그러나 CD를 사용하다보면 크고 작은 많은 스크래치를 입어 재생중 튀거나 음질이 떨어지게 된다.But when you use a CD, you'll get a lot of scratches, big and small, causing it to bounce or play poorly during playback.
본 고안은 이러한 점을 감안한 것으로, CD의 표면에 압축 코딩 기술을 이용하여 재생에 지장이 없는 두께의 보호막을 입혀 CD 표면의 스크래치를 방지함으로써 깨끗한 음질의 유지 및 CD의 수명을 늘릴 수 있도록 한 스크래치 보호막을 갖는 컴팩트 디스크를 제공함에 그 목적이 있다.The present invention has been made in view of the above-mentioned problems. By using a compression coding technique on the surface of a CD, a scratch-proof protective film is applied to prevent scratches on the surface of the CD so that it can maintain a clean sound quality and extend the life of the CD. It is an object to provide a compact disk having a protective film.
상기의 목적을 달성하기 위한 본 고안은 CD 표면에 압축 코딩 기술을 이용하여 약 0.2㎜ 두께의 폴리카보네이트(Polycarbonate) 필름 보호막을 입혀 CD 표면의 스크래치를 방지하며, 보호막 표면에 스크래치가 많이 났을 경우 보호막 제거용 탭을 이용하여 원하는 시기에 보호막을 제거함으로써 CD의 수명을 연장하며 깨끗한 음질을 얻을 수 있도록 함을 특징으로 한다.The present invention for achieving the above object by using a compression coding technology on the surface of the CD coated polycarbonate (Polycarbonate) film protective film to prevent scratches on the surface of the CD, the protective film in the case of a lot of scratches on the surface of the protective film The removal tab is used to remove the protective film at the desired time, extending the life of the CD and providing clean sound quality.
도 1은 본 고안에 따른 스크래치 보호막을 갖는 컴팩트 디스크의 구조도1 is a structural diagram of a compact disk having a scratch protective film according to the present invention
도 2는 본 고안에 따른 스크래치 보호막을 갖는 컴팩트 디스크에 보호막 제거용 탭을 나타낸 도면Figure 2 is a view showing a tab for removing the protective film on a compact disk having a scratch protective film according to the present invention
도 3 (a), (b)는 컴팩트 디스크의 플랫부와 핏트부 및 이에 대한 빔의 입사 및 반사 상태도3 (a) and 3 (b) show the incidence and reflection states of the flat and fit portions of the compact disc and beams thereof;
*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *
1 : 라벨2 : 보호막1: label 2: protective film
3 : 반사막4 : 투명 플라스틱3: reflective film 4: transparent plastic
5 : 스크래치 방지용 보호막6 : 보호막 제거용 탭5: Scratch-resistant protective film 6: Protective film removal tab
도 1은 본 고안에 따른 스크래치 보호막을 갖는 컴팩트 디스크의 구조도를 도시한 것으로, 라벨(1), 보호막(2), 플랫(Flat)부(3a)와 데이터가 쓰여져 있는 핏트(Pit)부(3b)로 이루어지는 반사막(3), 투명 플라스틱(4), 스크래치 방지를 위한 스크래치 방지용 보호막(5)으로 구성된다.1 shows a structural diagram of a compact disc having a scratch protective film according to the present invention, wherein a label 1, a protective film 2, a flat portion 3a and a fit portion 3b on which data is written. ), A reflective film 3 made of a transparent film 4, a transparent plastic 4, and a scratch protection film 5 for preventing scratches.
상기 스크래치 방지용 보호막(5)은 약 0.2㎜ 두께의 폴리카보네이트 필름으로 형성되며, 도 2에 도시한 바와 같이 보호막 제거용 탭(6)에 의해 제거 가능토록 형성된다.The scratch prevention protective film 5 is formed of a polycarbonate film having a thickness of about 0.2 mm, and is formed to be removable by the protective film removing tab 6 as shown in FIG. 2.
상기와 같은 본 고안의 원리를 설명하면 다음과 같다.The principle of the present invention as described above is as follows.
CD 표면에 스크래치가 나면 투명 플라스틱(4)의 굴절율이 변하여 빛의 양을 정확히 감지하지 못하기 때문에 음질에 변화가 생긴다.If the surface of the CD is scratched, the refractive index of the transparent plastic 4 changes, so that the amount of light cannot be accurately sensed, resulting in a change in sound quality.
그러므로 상기 0.2㎜의 스크래치 방지용 보호막(5)은 이 정도 깊이의 스크래치를 커버할 수 있다.Therefore, the 0.2 mm scratch prevention protective film 5 can cover the scratch of such a depth.
즉, 도 3 (a), (b)에 도시한 바와 같이 플랫부(3a)와 핏트부(3b)의 위상차가 레이저 파장(0.78㎛)의 1/4파장이며, 현재 CD는 피치(Pitch) 높이(0.11㎛)×투명 플라스틱(4)의 굴절율(1.5) = 0.165㎛이다. 이는 레이저 파장의 1/4파장(0.195㎛)에 조금 모자란다.That is, as shown in Figs. 3A and 3B, the phase difference between the flat portion 3a and the fit portion 3b is 1/4 wavelength of the laser wavelength (0.78 mu m), and the current CD is pitch. The refractive index (1.5) of height (0.11 micrometer) x transparent plastics 4 is 0.165 micrometer. This is slightly less than 1/4 wavelength (0.195 mu m) of the laser wavelength.
만약, 0.2㎜의 스크래치 방지용 보호막(5)이 있는 CD는 피치(Pitch) 높이(0.11㎛)×투명 플라스틱(4)과 스크래치 방지용 보호막(5)의 굴절율(0.25) = 0.192㎛이므로 레이저 파장의 1/4파장이 되어 전혀 재생에 문제가 되지 않는다.If the CD with the 0.2 mm scratch protection film 5 has a pitch height (0.11 µm) x the transparent plastic 4 and the refractive index (0.25) = 0.192 µm of the scratch protection film 5, the laser wavelength 1 It becomes / 4 wavelength and is not a problem for reproduction at all.
그리고 CD 표면에 지워지지 않는 이물질이 묻었을 경우 사용자가 필요에 따라서 보호막 제거용 탭(6)을 이용하여 스크래치 방지용 보호막(5)을 제거하여 좋은 음질을 얻을 수 있다.In addition, when the foreign substance is not erased on the surface of the CD, the user can remove the scratch prevention protective film 5 by using the protective film removing tab 6 as necessary to obtain good sound quality.
이상에서 살펴본 바와 같이 본 고안은 스크래치 방지용 보호막을 이용하여 CD 표면의 스크래치를 방지할 수 있게 되므로 좋은 음질 및 CD의 수명을 늘릴 수 있게 된다.As described above, the present invention can prevent scratches on the surface of the CD by using a scratch protection film, thereby increasing the sound quality and life of the CD.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960048059U KR19980035089U (en) | 1996-12-12 | 1996-12-12 | Compact discs with scratch shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019960048059U KR19980035089U (en) | 1996-12-12 | 1996-12-12 | Compact discs with scratch shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR19980035089U true KR19980035089U (en) | 1998-09-15 |
Family
ID=53989087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019960048059U KR19980035089U (en) | 1996-12-12 | 1996-12-12 | Compact discs with scratch shield |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR19980035089U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100712774B1 (en) * | 2001-06-11 | 2007-05-02 | 엘지전자 주식회사 | High density optical disc |
-
1996
- 1996-12-12 KR KR2019960048059U patent/KR19980035089U/en not_active Application Discontinuation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100712774B1 (en) * | 2001-06-11 | 2007-05-02 | 엘지전자 주식회사 | High density optical disc |
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