KR930014346A - Focusing Circuit of Optical Disc Device - Google Patents
Focusing Circuit of Optical Disc Device Download PDFInfo
- Publication number
- KR930014346A KR930014346A KR1019910025043A KR910025043A KR930014346A KR 930014346 A KR930014346 A KR 930014346A KR 1019910025043 A KR1019910025043 A KR 1019910025043A KR 910025043 A KR910025043 A KR 910025043A KR 930014346 A KR930014346 A KR 930014346A
- Authority
- KR
- South Korea
- Prior art keywords
- focusing
- focusing circuit
- optical disc
- circuit
- focus
- Prior art date
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- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
본 발명은 광학디스크장치의 포커싱회로와 관련된 것으로서, 종래의 이러한 포커싱회로에서 포커스점을 탐색하여 포커싱시킴으로써 대물렌즈의 자유상태위치와 포커싱위치사이와의 차이에서 오는 복원력으로 포커스루프의 DC적이득부담을 주게되거나 또는 포커스루프구동이후 포커싱이 제대로 안되었을 경우 재차 동작을 반복하여야 하는 불편이 있었다.The present invention relates to a focusing circuit of an optical disc apparatus, wherein by focusing by searching for and focusing a focus point in the conventional focusing circuit, the DC gain burden of the focus loop with a restoring force resulting from the difference between the free state position and the focusing position of the objective lens is achieved. Or if focusing is not done properly after focus loop driving, it was inconvenient to repeat the operation again.
그러나, 본 발명은 상기와 같은 문제점을 개선할 수 있도록 포커싱회로에 사용되는 파형발생기 대신에 DA컨버터데이타가 가해지는 DA컨버터(1)를 구비시킨 구성의 포커싱회로를 제공하는데 있다.However, the present invention provides a focusing circuit having a DA converter 1 to which DA converter data is applied instead of a waveform generator used in the focusing circuit so as to improve the above problems.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.
제2도는 제1도와 관련하여 포커싱전압의 합신호 및 차신호상태를 나타내는 참고도.2 is a reference diagram showing a sum signal and a difference signal state of a focusing voltage in relation to FIG.
제4도는 제3도에서 포커스 위치검출상태를 나타내는 참고도.4 is a reference diagram showing a focus position detection state in FIG.
제5도는 제3도의 각부 파형도.5 is a waveform diagram of each part of FIG.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910025043A KR930014346A (en) | 1991-12-30 | 1991-12-30 | Focusing Circuit of Optical Disc Device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019910025043A KR930014346A (en) | 1991-12-30 | 1991-12-30 | Focusing Circuit of Optical Disc Device |
Publications (1)
Publication Number | Publication Date |
---|---|
KR930014346A true KR930014346A (en) | 1993-07-23 |
Family
ID=67346186
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019910025043A KR930014346A (en) | 1991-12-30 | 1991-12-30 | Focusing Circuit of Optical Disc Device |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR930014346A (en) |
-
1991
- 1991-12-30 KR KR1019910025043A patent/KR930014346A/en not_active Application Discontinuation
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
N231 | Notification of change of applicant | ||
WITN | Withdrawal due to no request for examination |