KR20010036494A - Method for controlling spindle motor speed in optical disc driver - Google Patents
Method for controlling spindle motor speed in optical disc driver Download PDFInfo
- Publication number
- KR20010036494A KR20010036494A KR1019990043522A KR19990043522A KR20010036494A KR 20010036494 A KR20010036494 A KR 20010036494A KR 1019990043522 A KR1019990043522 A KR 1019990043522A KR 19990043522 A KR19990043522 A KR 19990043522A KR 20010036494 A KR20010036494 A KR 20010036494A
- Authority
- KR
- South Korea
- Prior art keywords
- speed
- track
- eccentricity
- vibration
- disc
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/20—Driving; Starting; Stopping; Control thereof
- G11B19/28—Speed controlling, regulating, or indicating
-
- 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
- G11B7/08—Disposition or mounting of heads or light sources relatively to record carriers
- G11B7/09—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B7/095—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble
- G11B7/0953—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following specially adapted for discs, e.g. for compensation of eccentricity or wobble to compensate for eccentricity of the disc or disc tracks
-
- 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
Landscapes
- Rotational Drive Of Disk (AREA)
- Optical Recording Or Reproduction (AREA)
Abstract
본 발명은, 광디스크 장치에서의 배속 조정방법에 관한 것으로, 일정속도로 디스크를 회전시키면서 편심에 의한 트랙횡단 수를 측정 및 저장하는 1단계; 상기 일정속도보다 빠른 속도로 디스크를 회전시키면서 진동에 의한 트랙횡단 수를 측정하는 2단계; 및 상기 편심 및 진동에 의해 각각 측정된 트랙횡단 수에 근거하여, 배속을 조정하는 3단계를 포함하여 이루어지는 것으로, 광디스크의 편심(Eccentricity)에 따른 트랙횡단 수와, 진동(Vibration)에 따른 트랙횡단 수를 각각 측정하여, 디스크의 불균형에 따른 트랙횡단 수만을 산출한 후, 그에 따른 배속 조정동작을 수행함으로써, 고배속 모드에서 트랙킹 서보동작에 의해 무시될 수 있는 디스크 편심에 의한 영향을 배제시켜, 불균형 디스크에 적합한 배속 조정이 정확히 수행되도록 하는 매우 유용한 발명인 것이다.The present invention relates to a double speed adjusting method in an optical disk apparatus, comprising: a step of measuring and storing a track crossing number due to an eccentricity while rotating a disk at a constant speed; Measuring the number of track crossings due to vibration while rotating the disk at a speed faster than the predetermined speed; And three steps of adjusting the speed according to the number of track crossings measured by the eccentricity and the vibration, respectively. The number of track crossings according to the eccentricity of the optical disc and the track crossing according to the vibration are included. By measuring the number respectively, calculating only the number of track crossings according to the disc imbalance, and then performing the double speed adjustment operation accordingly, the effect of the disc eccentricity that can be neglected by the tracking servo operation in the high speed mode is excluded, resulting in unbalance. It is a very useful invention to ensure that the proper speed adjustment for the disc is performed correctly.
Description
본 발명은, 광디스크 장치에서의 배속 조정방법에 관한 것으로, 더욱 상세하게는 씨디롬 드라이버(CD-ROM Driver)와 같은 광디스크 장치에 불균형 디스크가 삽입되는 경우, 상기 불균형 디스크에 적합한 배속 조정이 이루어지도록 하는 광디스크 장치에서의 배속 조정방법에 관한 것이다.The present invention relates to a method for adjusting a speed in an optical disk device, and more particularly, when an unbalanced disk is inserted into an optical disk device such as a CD-ROM driver, a speed adjustment suitable for the unbalanced disk is performed. A double speed adjusting method in an optical disk device.
우선, 도 1은 일반적인 광디스크 장치인 씨디롬 드라이버(CD-ROM Driver)에 대한 구성을 도시한 것으로, 상기 씨디롬 드라이버는, 씨디롬(CD-ROM) 디스크와 같은 광디스크(1)에 기록된 신호를 독출하는 광픽업(P/U)(2); 상기 광픽업(2)에 의해 독출되는 신호를 여파정형하여 이진신호(Binary Signal)로 출력하는 여파정형부(3); 상기 이진신호를 디지털 신호 처리하여 디지털 데이터로 복원 출력하는 디지털신호 처리부(DSP)(4); 상기 디지털 데이터를 개인용 컴퓨터(PC)와 같은 호스트(Host)로 전송하는 인터페이스부(5); 상기 광픽업(2)을 이동시키는 슬레드(Sled)모터(10); 상기 광디스크(1)를 회전시키는 스핀들(Spindle)모터(11); 상기 슬레드모터(10)와 스핀들모터(11)의 회전을 구동시키는 드라이버(Driver)(7); 상기 광픽업(2)과 드라이버(7)의 동작을 제어하는 서보(Servo)부(6); 상기 서보부(6) 및 디지털신호 처리부(4)의 동작을 제어하는 마이컴(Micom)(8); 상기 마이컴(8)의 제어동작에 필요한 데이터(Data)를 저장하는 메모리(9)를 포함하여 구성되는 것으로, 상기와 같이 구성되는, 씨디롬 드라이버에서의 동작 특히, 씨디롬(CD-ROM)과 같은 광디스크(1)에 기록된 신호를 보다 정확히 독출하기 위하여, 광디스크의 진동 상태에 따라 스핀들모터(11)의 회전속도를 적정하게 가변 조정하는 배속 조정동작에 대해 도 2를 참조로 상세히 설명한다.First, FIG. 1 shows a configuration of a CD-ROM driver which is a general optical disk device. The CD-ROM driver reads signals recorded on an optical disk 1 such as a CD-ROM disk. Optical pickup (P / U) 2; A filtering shape unit (3) for filtering the signal read out by the optical pickup (2) and outputting the filtered signal as a binary signal; A digital signal processor (DSP) 4 for digitally processing the binary signal and restoring and outputting the digital signal; An interface unit 5 for transmitting the digital data to a host such as a personal computer (PC); Sled motor (10) for moving the optical pickup (2); A spindle motor 11 for rotating the optical disc 1; A driver (7) for driving rotation of the sled motor (10) and the spindle motor (11); A servo unit 6 for controlling operations of the optical pickup 2 and the driver 7; A micom 8 for controlling the operations of the servo unit 6 and the digital signal processing unit 4; An optical disk such as a CD-ROM, particularly an operation in a CD-ROM driver, comprising a memory 9 for storing data (Data) necessary for the control operation of the microcomputer 8, and configured as described above. In order to more accurately read the signal recorded in (1), a double speed adjustment operation for appropriately adjusting the rotational speed of the spindle motor 11 in accordance with the vibration state of the optical disc will be described in detail with reference to FIG.
도 2는, 상기 씨디롬 드라이버에서 이루어지는 종래의 배속 조정방법에 대한 동작 흐름도를 도시한 것으로, 먼저 씨디롬(CD-ROM)과 같은 광디스크(1)가 씨디롬 드라이버에 구비된 트레이(Tray)(미도시)에 안착, 삽입되면, 클램퍼(Clamper)(미도시)에 의해 클램핑(Clamping)(S10)되고, 이후 상기 드라이버(7)로부터 공급되는 구동전압에 따라 스핀들모터(11)가 회전되어, 상기 광디스크(1)를 일정속도로 회전시키게 된다.FIG. 2 is a flowchart illustrating a conventional double speed adjustment method performed in the CD-ROM driver. First, a tray (not shown) in which an optical disc 1 such as a CD-ROM is provided in the CD-ROM driver is shown. When it is seated in and inserted into the clamping device (C10), it is clamped by a clamper (not shown) (S10), and then the spindle motor 11 is rotated according to the driving voltage supplied from the driver 7, thereby the optical disk ( 1) is rotated at a constant speed.
이후, 광픽업(2)은, 상기 광디스크(1)의 내주면에 기록된 디스크 목차 정보인 TOC(Top of Contents)정보를 독출하기 위하여 광픽업(2)에 구비된 레이저 다이오드(LD: Laser Diode)를 발광시켜 상기 TOC 정보가 기록된 기록위치에 광스폿(Spot)을 형성시키고, 상기 형성된 광스폿의 반사광은 광픽업(2)에 구비된 포토 다이오드(PD: Photo Diode)에 의해 전기신호로 변환 출력된다.Thereafter, the optical pickup 2 includes a laser diode (LD) provided in the optical pickup 2 to read TOC (Top of Contents) information, which is the disk contents information recorded on the inner circumferential surface of the optical disk 1. A light spot is formed at a recording position at which the TOC information is recorded, and the reflected light of the formed light spot is converted into an electrical signal by a photo diode (PD) provided in the optical pickup 2. Is output.
상기 변환 출력되는 전기신호는 여파정형부(3)에 의해 이진신호로 변환되고, 상기 디지털신호 처리부(4)에 의해 다시 디지털 데이터로 복원 출력되어 메모리(9)에 저장된다.The converted and output electrical signal is converted into a binary signal by the filter shaping section 3, and restored by the digital signal processing section 4 as digital data and stored in the memory 9 again.
이후, 상기 마이컴(8)은, TOC 정보 독출동작이 완료(S11)되면, 상기 스핀들모터(11)의 구동속도를 증가시킨 상태에서 광픽업(2)의 트랙킹 서보동작 즉, 광디스크 기록면에 형성되는 광스폿이 광디스크의 기록 트랙을 추종하도록 포커스 렌즈의 수평이동을 제어하는 트랙킹 서보동작을 차단시키게 된다. 이에 따라, 광디스크의 편심(Eccentricity) 및 불균형(Unbalance) 등에 의해 발생되는 디스크 진동(Vibration)에 따라, 상기 광스폿이 기록 트랙을 횡단하게 되는 데, 이때 검출되는 트랙횡단 수(C1)를 카운트(S12)하여, 사전에 설정된 기준 트랙횡단 수(Cref1)와 비교(S13)하게 된다.Thereafter, when the TOC information reading operation is completed (S11), the microcomputer 8 is formed on the tracking servo operation of the optical pickup 2, that is, on the optical disk recording surface in a state in which the driving speed of the spindle motor 11 is increased. The tracking servo operation for controlling the horizontal movement of the focus lens is blocked so that the optical spot follows the recording track of the optical disc. Accordingly, the optical spot traverses the recording track according to the disc vibration caused by the eccentricity and unbalance of the optical disc. At this time, the detected number of track crossings C1 is counted ( In step S12, the comparison is made with the reference track crossing number Cref1 set in advance (S13).
상기 비교결과, 카운트된 트랙횡단 수(C1)가 기준 횡단트랙 수(Cref1)를 초과하는 경우, 광디스크(1)상에 편심 또는 불균형이 많이 존재한다고 판단하여, 저배속 모드에서 안정된 데이터 독출동작 수행되도록 스핀들모터(11)의 구동속도를 저배속으로 조정(S14)하게 되고, 상기 비교결과, 카운트된 트랙횡단 수(C1)가 기준 횡단트랙 수(Cref1)를 초과하지 않는 경우에는, 광디스크(1)상에 편심 또는 불균형이 많이 존재하지 않는다고 판단한 후, 디스크의 회전속도를 조금 더 증가시킨 상태에서 다시 검출되는 트랙횡단 수(C2)를 카운트(S15)하여, 또다른 기준 트랙횡단 수(Cref2 〉 Cref1)와 비교(S16)하게 된다.As a result of the comparison, when the counted number of track crossings C1 exceeds the reference number of crossing tracks Cref1, it is determined that a large amount of eccentricity or imbalance exists on the optical disc 1, and thus a stable data reading operation is performed in the low speed mode. If the drive speed of the spindle motor 11 is adjusted to low speed as much as possible (S14), and as a result of the comparison, when the counted track traverse number C1 does not exceed the reference traverse track number Cref1, the optical disc 1 After determining that there is not much eccentricity or imbalance on the disk, the number of track crossings C2 detected again is counted (S15) while the disk's rotational speed is slightly increased, and another reference track crossings (Cref2 > Cref1) is compared (S16).
상기 비교결과, 다시 카운트된 트랙횡단 수(C2)가 기준 횡단트랙 수(Cref2)를 초과하는 경우, 광디스크(1)상에 편심 또는 불균형이 상당량 존재한다고 판단하여, 스핀들모터(11)의 구동속도를 저배속으로 조정하게 되고, 상기 비교결과, 다시 카운트된 트랙횡단 수(C2)가 기준 횡단트랙 수(Cref2)를 초과하지 않는 경우에는, 광디스크(1)상에 편심 또는 불균형이 적다고 판단하여, 스핀들모터(11)의 구동속도를 고배속으로 조정(S17)하여 신속한 데이터 독출동작이 이루어지도록 하게 된다.As a result of the comparison, when the counted track crossing number C2 exceeds the reference crossing track number Cref2, it is determined that a considerable amount of eccentricity or imbalance exists on the optical disc 1, and the drive speed of the spindle motor 11 is determined. Is adjusted to a low speed, and when the comparison result shows that the counted track crossings C2 do not exceed the reference crossing tracks Cref2, it is determined that there is little eccentricity or unbalance on the optical disc 1 To adjust the driving speed of the spindle motor 11 to a high speed (S17), a rapid data reading operation is performed.
그러나, 상기와 같이 트랙킹 서보동작이 차단된 상태에서 검출 및 카운트되는 트랙횡단 수(C1,C2)는 광디스크의 불균형은 물론 광디스크의 편심에 따른 영향을 모두 받게 되는 것으로, 사실상 고배속 모드에서의 광디스크 편심은, 트랙킹 서보동작에 의해 보상처리가 가능하기 때문에 무시될 수 있는 데, 예를들어, 고배속 모드에서 광디스크의 진동을 크게 야기시키는 디스크 불균형이 적고, 대신 고배속 모드에서 무시될 수 있는 디스크 편심이 많이 존재하는 디스크인 경우, 고배속 모드로 유지하여도 데이터 재생에 무리가 없음에도 불구하고, 상기 광디스크의 불균형 및 편심에 따른 영향을 모두 받게 되는 트랙횡단 수(C1,C2)에 근거하여 배속을 조정하기 때문에 저배속 모드로 조정하게 됨으로써, 재생 성능이 저하되는 문제점이 있었다.However, the number of track crossings C1 and C2 detected and counted in the state where the tracking servo operation is blocked as described above is affected by both the imbalance of the optical disc and the eccentricity of the optical disc. Can be neglected because of the compensating process possible by the tracking servo operation, for example, there is little disc imbalance that causes vibration of the optical disc in high speed mode, and many disc eccentricity that can be ignored in high speed mode instead. In the case of existing discs, the speed is adjusted based on the number of track crossings (C1, C2) that are both affected by the imbalance and the eccentricity of the optical disc, even though the data reproduction is easy even if the disc is maintained in the high speed mode. Therefore, there is a problem that the playback performance is lowered by adjusting to the low speed mode.
따라서, 본 발명은 상기와 같은 문제점을 해결하기 위해 창작된 것으로서, 디스크의 편심(Eccentricity)에 따른 트랙횡단 수와, 진동(Vibration)에 따른 트랙횡단 수를 각각 측정하여, 디스크의 불균형에 따른 트랙횡단 수를 산출한 후, 그에 따른 배속 조정동작을 수행함으로써, 불균형 디스크에 적합한 배속 조정이 이루어지도록 하는 광디스크 장치에서의 배속 조정방법을 제공하는 데, 그 목적이 있는 것이다.Therefore, the present invention was created to solve the above problems, by measuring the number of track crossings according to the disc eccentricity and the number of track crossings due to vibration, respectively, the tracks according to the imbalance of the disc It is an object of the present invention to provide a method of adjusting a speed in an optical disk apparatus in which a speed adjustment suitable for an unbalanced disk is made by calculating the number of traverses and then performing the speed adjustment operation accordingly.
도 1은 일반적인 광디스크 장치에 대한 구성을 도시한 것이고,1 shows a configuration of a general optical disk device,
도 2는 일반적인 광디스크 장치에서의 배속 조정방법에 대한 동작 흐름도를 도시한 것이고,2 is a flowchart illustrating a method of adjusting a speed in a general optical disk device;
도 2는 본 발명에 따른 광디스크 장치에서의 디스크 편심 및 진동에 따른 트랙횡단 수 측정과정을 도시한 것이고,2 is a view illustrating a track crossing number measurement process according to disc eccentricity and vibration in an optical disc apparatus according to the present invention.
도 3은 본 발명에 따른 광디스크 장치에서의 배속 조정방법에 대한 동작 흐름도이다.3 is a flowchart illustrating a method of adjusting a speed in an optical disk device according to the present invention.
※ 도면의 주요부분에 대한 부호의 설명※ Explanation of code for main part of drawing
1 : 광디스크 2 : 광픽업(P/U)1: Optical disc 2: Optical pickup (P / U)
3 : 여파정형부(R/F) 4 : 디지털 신호처리부3: Filtering part (R / F) 4: Digital signal processing part
5 : 인터페이스부 6 : 서보부(Servo)5: Interface unit 6: Servo unit (Servo)
7 : 드라이버(Driver) 8 : 마이컴(Micom)7: Driver 8: Micom
9 : 메모리(Memory) 10 : 슬레드(Sled) 모터9: Memory 10: Sled Motor
11 : 스핀들(Spindle) 모터11: Spindle Motor
상기와 같은 목적을 달성하기 위한 본 발명에 따른 광디스크 장치에서의 배속 조정방법은, 일정속도로 디스크를 회전시키면서 편심에 의한 트랙횡단 수를 측정 및 저장하는 1단계; 상기 일정속도보다 빠른 속도로 디스크를 회전시키면서 진동에 의한 트랙횡단 수를 측정하는 2단계; 및 상기 편심 및 진동에 의해 각각 측정된 트랙횡단 수에 근거하여, 배속을 조정하는 3단계를 포함하여 이루어지는 것으로, 상기 2단계는, 상기 일정속도보다 빠른 속도로 디스크를 회전시키면서 진동에 의한 트랙횡단 수를 1차 측정하는 하위 1단계; 및 상기 1차 측정된 트랙횡단 수가 소정값 이하이면, 더 빠른 속도로 디스크를 회전시키면서 진동에 의한 트랙횡단 수를 2차 측정하는 하위 2단계를 포함하여 이루어지고, 상기 3단계는, 상기 2차 측정된 트랙횡단 수와 상기 저장된 트랙횡단 수간의 차 값이, 사전에 설정된 기준값보다 작은 경우에는 배속을 상향조정하는 것을 특징으로 한다.In the optical disk device according to the present invention for achieving the above object, the method for adjusting the speed, the first step of measuring and storing the number of track crossings due to the eccentricity while rotating the disk at a constant speed; Measuring the number of track crossings due to vibration while rotating the disk at a speed faster than the predetermined speed; And three steps of adjusting a double speed based on the number of track crossings measured by the eccentricity and the vibration, respectively, wherein the second step includes rotating the disc at a speed faster than the predetermined speed. A lower first step of measuring the number first; And a lower two step of secondly measuring the number of track crossings due to vibration while rotating the disk at a higher speed when the number of first measured track crossings is less than or equal to a predetermined value, wherein the third step is the second order. When the difference value between the measured track crossing number and the stored track crossing number is smaller than a preset reference value, the speed is increased.
이하, 본 발명에 따른 광디스크 장치에서의 배속 조정방법에 대한 바람직한 실시예에 대해 첨부된 도면에 의거하여 상세히 설명한다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, a preferred embodiment of a method of adjusting a speed in an optical disk device according to the present invention will be described in detail with reference to the accompanying drawings.
우선, 본 발명이 적용되는 광디스크 장치에서는, 도 3의 (a)에 도시한 바와 같이, TOC 정보 독출 동작과 함께, 광디스크의 편심에 따른 트랙횡단 수(Cd)를 측정 및 저장하고, 이후 도 3의 (b) 및 (c)에 도시한 바와 같이, 슬레드모터(11)를 구동 제어하여 광디스크의 회전속도를 다단계로 증가시킨 상태에서 도 2를 참조로 전술한 바와 같이, 트랙킹 서보동작을 차단시켜 광디스크의 편심 및 불균형 등에 의해 발생되는 디스크 진동(Vibration)에 따른 트랙횡단 수(C1,C2)를 각각 카운트하고, 상기 트랙킹 서보동작이 차단된 상태에서 카운트된 트랙횡단 수, 특히 회전속도를 다단계로 증가시킨 상태에서 카운트되는 트랙횡단 수(C2)가 소정범위의 값을 갖게 되는 경우, 상기 트랙횡단 수(C2)와 상기 트랙킹 서보동작이 유지되는 상태에서 카운트된 트랙횡단 수(Cd)를 감산하여, 저배속 모드로 조정하기 이전에 광디스크의 불균형에 의해 카운트되는 트랙횡단 수에 보다 근접한 트랙횡단 수(C2-Cd)를 산출하게 되는 것으로, 이하 첨부된 도 4를 참조로 본 발명에 따른 광디스크 장치에서의 배속 조정방법에 대해 상세히 설명하면 다음과 같다.First, in the optical disk apparatus to which the present invention is applied, as shown in FIG. 3A, the track crossing number Cd according to the eccentricity of the optical disk is measured and stored together with the TOC information reading operation. As shown in (b) and (c), the tracking servo operation is blocked as described above with reference to FIG. 2 while driving the sled motor 11 to increase the rotational speed of the optical disc in multiple stages. By counting the number of track crossings (C1, C2) according to the disk vibration (Vibration) caused by the eccentricity and imbalance of the optical disk, respectively, multi-step the number of track crossings counted in the state that the tracking servo operation is blocked When the number of track crossings C2 counted in the increased state has a value in a predetermined range, the number of track crossings Cd counted in the state where the track crossing number C2 and the tracking servo operation are maintained is reduced. Affiliate For example, before adjusting to the low speed mode, the number of track crossings C2-Cd closer to the number of track crossings counted by the imbalance of the optical disk is calculated. The optical disk according to the present invention will be described with reference to FIG. The method of adjusting the speed in the apparatus will be described in detail as follows.
도 4는, 본 발명에 따른 광디스크 장치에서의 배속 조정방법에 대한 동작 흐름도를 도시한 것으로, 먼저 씨디롬(CD-ROM)과 같은 광디스크(1)가 씨디롬 드라이버에 구비된 트레이(Tray)(미도시)에 안착, 삽입되면, 클램퍼(Clamper)(미도시)에 의해 클램핑(Clamping)(S30)되고, 이후 상기 드라이버(7)로부터 공급되는 구동전압에 따라 스핀들모터(11)가 회전되어, 상기 광디스크(1)를 일정속도로 회전시키게 된다.4 is a flowchart illustrating a method of adjusting a speed in an optical disk apparatus according to the present invention. First, an optical tray 1 such as a CD-ROM is provided in a CD-ROM driver (not shown). When it is seated and inserted into the optical disk, the clamping (S30) is clamped by a clamper (not shown), and then the spindle motor 11 is rotated according to the driving voltage supplied from the driver 7, thereby the optical disk Rotate (1) at a constant speed.
이후, 광픽업(2)은, 상기 광디스크(1)의 내주면에 기록된 디스크 목차 정보인 TOC(Top of Contents)정보를 독출하기 위하여 광픽업(2)에 구비된 레이저 다이오드(LD: Laser Diode)를 발광시켜 상기 TOC 정보가 기록된 기록위치에 광스폿(Spot)을 형성시키고, 상기 형성된 광스폿의 반사광은 광픽업(2)에 구비된 포토 다이오드(PD: Photo Diode)에 의해 전기신호로 변환 출력된다.Thereafter, the optical pickup 2 includes a laser diode (LD) provided in the optical pickup 2 to read TOC (Top of Contents) information, which is the disk contents information recorded on the inner circumferential surface of the optical disk 1. A light spot is formed at a recording position at which the TOC information is recorded, and the reflected light of the formed light spot is converted into an electrical signal by a photo diode (PD) provided in the optical pickup 2. Is output.
상기 변환 출력되는 전기신호는 여파정형부(3)에 의해 이진신호로 변환되고, 상기 디지털신호 처리부(4)에 의해 다시 디지털 데이터로 복원 출력되어 메모리(9)에 저장되는 데, 이때 트랙킹 서보동작이 유지되는 TOC 정보의 독출동작과 함께 광디스크의 편심에 따른 트랙횡단 수(Cd)를 측정 및 저장(S31)하게 된다.The converted and output electrical signal is converted into a binary signal by the filter shaping unit 3, and restored by the digital signal processing unit 4 as digital data and stored in the memory 9, wherein the tracking servo operation Along with the read operation of the held TOC information, the track crossing number Cd according to the eccentricity of the optical disc is measured and stored (S31).
이후, 상기 마이컴(8)은, TOC 정보 독출동작이 완료되면, 상기 스핀들모터(11)의 구동속도를, 도 3의 (b)에 도시한 바와 같이, 한 단계 증가시킨 상태에서 광스폿이 광디스크의 기록 트랙을 추종하도록 포커스 렌즈의 수평이동을 제어하는 트랙킹 서보동작을 차단시켜, 광디스크의 진동(Vibration)에 의해 상기 광스폿이 기록 트랙을 횡단하게 되어 검출되는 트랙횡단 수(C1)를 카운트(S32)하게 된다.After that, when the TOC information reading operation is completed, the microcomputer 8 has the optical spot in the state where the optical speed of the spindle motor 11 is increased by one step, as shown in FIG. The tracking servo operation for controlling the horizontal movement of the focus lens to follow the recording track is blocked, so that the number of track crossings C1 detected by the optical spot traversing the recording track by vibration of the optical disc is counted. S32).
또한, 상기 마이컴(8)은 상기 트랙킹 서보동작이 차단된 상태에서 카운트된 트랙횡단 수(C1)가 사전에 설정된 기준 횡단트랙 수(Cref1) 예를들어 6,000개 이상이 되는 지를 비교 판별(S33)하게 된다.In addition, the microcomputer 8 compares and determines whether the number of track crossings C1 counted in the state in which the tracking servo operation is blocked becomes a reference cross track number Cref1 that is preset, for example, 6,000 or more (S33). Done.
상기 판별결과, 카운트된 트랙횡단 수(C1)가 기준 횡단트랙 수(Cref1)를 초과하는 경우, 광디스크(1)상에 불균형이 많이 존재한다고 판단하여, 저배속 모드에서 안정된 데이터 독출동작 수행되도록 스핀들모터(11)의 구동속도(C2-Cd)를 저배속으로 조정(S34)하게 되고, 상기 판별결과, 카운트된 트랙횡단 수(C1)가 기준 횡단트랙 수(Cref1)를 초과하지 않는 경우에는, 광디스크(1)상에 불균형이 많이 존재하지 않는다고 1차 판단한 후, 도 3의 (c)에 도시한 바와 같이, 디스크의 회전속도를 조금 더 증가시킨 상태에서 다시 검출되는 트랙횡단 수(C2)를 카운트(S35)하여, 상기 기준 횡단트랙 수(Cref1)보다 더 많은 기준 트랙횡단 수의 범위(Cref2∼Cref3), 예를들어 9,000개 내지 10,000개 범위에 포함되는 지를 다시 비교 판별(S36)하게 된다.As a result of the determination, when the counted number of track crossings C1 exceeds the reference number of crossing tracks Cref1, it is determined that a large amount of imbalance exists on the optical disc 1, so that the spindle can perform a stable data reading operation in a low speed mode. When the driving speed C2-Cd of the motor 11 is adjusted to low speed (S34), and as a result of the determination, the counted track crossing number C1 does not exceed the reference crossing track number Cref1, After primarily determining that there are not many imbalances on the optical disc 1, as shown in Fig. 3C, the number of track crossings C2 detected again in a state where the rotational speed of the disc is further increased is determined. By counting (S35), it is again compared and discriminated (S36) whether it is included in the range (Cref2 ~ Cref3), for example, the range of 9,000 to 10,000 more than the number of reference track crossings (Cref1) .
상기 판별결과, 다시 카운트된 트랙횡단 수(C2)가 기준 트랙횡단 수의 범위(Cref2∼Cref3)에 포함되지 않는 경우, 광디스크(1)상에 불균형이 적다고 판단하여, 스핀들모터(11)의 구동속도를 고배속으로 조정(S37)하여 신속한 데이터 독출동작이 이루어지도록 하고, 상기 판별결과, 트랙횡단 수(C2)가 기준 트랙횡단 수의 범위(Cref2∼Cref3)에 포함되는 경우, 상기 진동에 의해 카운트된 트랙횡단 수(C2)와 상기 편심에 의해 카운트되어 저장된 트랙횡단 수(Cd)의 차 값(C2-Cd)을 산출하게 된다.As a result of the determination, if the counted track crossings C2 are not included in the ranges of the reference track crossings Cref2 to Cref3, it is determined that there is little unbalance on the optical disc 1, so that the spindle motor 11 The driving speed is adjusted to a high speed (S37) so that the data reading operation can be performed quickly. When the determination result shows that the track crossing number C2 is included in the range Cref2 to Cref3 of the reference track crossing number, the vibration is caused. The difference value C2-Cd between the counted track crossing number C2 and the track crossing number Cd stored by the eccentricity is calculated.
즉, 광디스크(1)의 불균형 및 편심에 의한 영향을 모두 받는 트랙횡단 수(C2)에서, 편심의 영향만을 받는 트랙횡단 수(Cd)를 감산하여, 광디스크의 불균형에 의해 카운트되는 트랙횡단 수에 보다 근접한 트랙횡단 수(C2-Cd)를 산출하게 된다.In other words, the number of track crossings C2 affected by both the unbalance and the eccentricity of the optical disk 1 is subtracted from the number of track crossings Cd only affected by the eccentricity, and the number of track crossings counted by the imbalance of the optical disks. The closer track crossing numbers C2-Cd are calculated.
이후, 상기 차 값(C2-Cd)이 기준 트랙횡단 수(Cref4), 예를들어 5,000개를 초과하는 지를 비교 판별(S38)하고, 상기 판별결과, 산출된 차 값(C2-Cd)이 기준 횡단트랙 수(Cref4)를 초과하는 경우, 광디스크(1)상에 불균형이 많이 존재한다고 판단하여, 저배속 모드에서 안정된 데이터 독출동작 수행되도록 스핀들모터(11)의 구동속도(C2-Cd)를 저배속으로 조정(S34)하게 되고, 상기 판별결과, 산출된 차 값(C2-Cd)이 기준 횡단트랙 수(Cref4)를 초과하지 않는 경우에는, 광디스크(1)상에 불균형이 많이 존재하지 않는다고 판단하여 재생배속을 고배속으로 상향조정(S37)하게 된다.Thereafter, the difference value (C2-Cd) exceeds the reference track crossing number (Cref4), for example, if it exceeds 5,000 (S38), and the determination result, the calculated difference value (C2-Cd) is a reference When the number of crossing tracks Cref4 is exceeded, it is determined that there are many imbalances on the optical disc 1, and the drive speed C2-Cd of the spindle motor 11 is reduced so that a stable data reading operation is performed in the low speed mode. When it is adjusted at double speed (S34), and the determination result shows that the calculated difference value C2-Cd does not exceed the reference number of transverse tracks Cref4, it is determined that there is not much imbalance on the optical disc 1. By adjusting the reproduction speed to high speed (S37).
상기와 같이 이루어지는 본 발명에 따른 광디스크 장치에서의 배속 조정방법은, 디스크의 편심(Eccentricity)에 따른 트랙횡단 수와, 진동(Vibration)에 따른 트랙횡단 수를 각각 측정하여, 디스크의 불균형에 따른 트랙횡단 수를 산출한 후, 그에 따른 배속 조정동작을 수행함으로써, 고배속 모드에서 트랙킹 서보동작에 의해 무시될 수 있는 디스크 편심에 의한 영향을 배제시켜, 불균형 디스크에 적합한 배속 조정이 정확히 수행되도록 하는 매우 유용한 발명인 것이다.In the optical disk device according to the present invention, the double speed adjusting method according to the present invention measures the number of track crossings according to the eccentricity of the disk and the number of track crossings according to the vibration, respectively. By calculating the number of traverses and performing the corresponding speed adjustment operation, it is very useful to eliminate the influence of disc eccentricity that can be neglected by the tracking servo operation in the high speed mode, so that the proper speed adjustment for the unbalanced disc can be performed accurately. It is an invention.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990043522A KR100662936B1 (en) | 1999-10-08 | 1999-10-08 | Double speed adjustment method in optical disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990043522A KR100662936B1 (en) | 1999-10-08 | 1999-10-08 | Double speed adjustment method in optical disk device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20010036494A true KR20010036494A (en) | 2001-05-07 |
| KR100662936B1 KR100662936B1 (en) | 2006-12-28 |
Family
ID=19614556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990043522A Expired - Fee Related KR100662936B1 (en) | 1999-10-08 | 1999-10-08 | Double speed adjustment method in optical disk device |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100662936B1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030072706A (en) * | 2002-03-06 | 2003-09-19 | 삼성전자주식회사 | Method and apparatus for removing vibration according to wobble of disc in the disc driver |
| KR100459705B1 (en) * | 2002-03-12 | 2004-12-04 | 삼성전자주식회사 | Method and apparatus for removing vibration in the disc driver |
| US7619954B2 (en) | 2005-03-21 | 2009-11-17 | Hitachi-Lg Data Storage Korea, Inc. | Method for controlling spindle in optical disc device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3463975B2 (en) * | 1997-10-22 | 2003-11-05 | ティアック株式会社 | Data reproduction method and apparatus |
-
1999
- 1999-10-08 KR KR1019990043522A patent/KR100662936B1/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030072706A (en) * | 2002-03-06 | 2003-09-19 | 삼성전자주식회사 | Method and apparatus for removing vibration according to wobble of disc in the disc driver |
| KR100459705B1 (en) * | 2002-03-12 | 2004-12-04 | 삼성전자주식회사 | Method and apparatus for removing vibration in the disc driver |
| US7619954B2 (en) | 2005-03-21 | 2009-11-17 | Hitachi-Lg Data Storage Korea, Inc. | Method for controlling spindle in optical disc device |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100662936B1 (en) | 2006-12-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6317399B1 (en) | Disk drive device and method of setting rotational speed thereof | |
| JP2851597B2 (en) | Automatic disc discriminating method and apparatus in optical disc system | |
| JPH1166712A (en) | Disk discriminating method | |
| JP2002117534A (en) | Optical disk reproducing device and kind of disk discriminating method | |
| KR20000061687A (en) | An apparatus and method for controlling reproducing speed of a disc | |
| JP2000311427A (en) | Disk discriminating method and apparatus | |
| KR100958582B1 (en) | Discrimining method of recordable disc and apparatus therefor | |
| KR100533747B1 (en) | Method for discriminating a type of optical disc | |
| KR100662936B1 (en) | Double speed adjustment method in optical disk device | |
| KR100419159B1 (en) | Servo control apparatus, servo control method and information reproducing apparatus | |
| JP3670806B2 (en) | Disc player's eccentric gravity disc detection method | |
| KR100653489B1 (en) | Surface vibration detection device and method for optical disk | |
| JP3685690B2 (en) | Read-only optical disk device | |
| KR100555487B1 (en) | Determination of Playback Speed Based on Deflection Vibration of Optical Disc | |
| KR100345234B1 (en) | An apparatus and method for detecting axial vibration | |
| JPH06111349A (en) | Optical information recording and reproducing device | |
| KR20020010387A (en) | Method for playing of an optical disk | |
| KR100223214B1 (en) | Method for discriminating kind of optical disk in optical disk player | |
| KR20010095389A (en) | Method for adjusting skew in an optical disc apparatus | |
| JP2001325766A (en) | Digital video disk player | |
| JP2000011531A (en) | Detecting method for disk having deviated center of gravity, for disk player | |
| JPH09147392A (en) | Optical disc reproducing method and optical disc device | |
| JPH08339550A (en) | Adjustment method of control circuit for optical disk drive | |
| JP2002329333A (en) | Optical disk device and optical disk discriminating method | |
| KR20010009869A (en) | Method for deciding rotation-speed of optical disk device based on the quantity of vibration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PA0109 | Patent application |
Patent event code: PA01091R01D Comment text: Patent Application Patent event date: 19991008 |
|
| PG1501 | Laying open of application | ||
| N231 | Notification of change of applicant | ||
| PN2301 | Change of applicant |
Patent event date: 20020813 Comment text: Notification of Change of Applicant Patent event code: PN23011R01D |
|
| A201 | Request for examination | ||
| PA0201 | Request for examination |
Patent event code: PA02012R01D Patent event date: 20040904 Comment text: Request for Examination of Application Patent event code: PA02011R01I Patent event date: 19991008 Comment text: Patent Application |
|
| E902 | Notification of reason for refusal | ||
| PE0902 | Notice of grounds for rejection |
Comment text: Notification of reason for refusal Patent event date: 20060127 Patent event code: PE09021S01D |
|
| AMND | Amendment | ||
| E601 | Decision to refuse application | ||
| PE0601 | Decision on rejection of patent |
Patent event date: 20060705 Comment text: Decision to Refuse Application Patent event code: PE06012S01D Patent event date: 20060127 Comment text: Notification of reason for refusal Patent event code: PE06011S01I |
|
| J201 | Request for trial against refusal decision | ||
| PJ0201 | Trial against decision of rejection |
Patent event date: 20060802 Comment text: Request for Trial against Decision on Refusal Patent event code: PJ02012R01D Patent event date: 20060705 Comment text: Decision to Refuse Application Patent event code: PJ02011S01I Appeal kind category: Appeal against decision to decline refusal Decision date: 20061002 Appeal identifier: 2006101006788 Request date: 20060802 |
|
| AMND | Amendment | ||
| PB0901 | Examination by re-examination before a trial |
Comment text: Amendment to Specification, etc. Patent event date: 20060821 Patent event code: PB09011R02I Comment text: Request for Trial against Decision on Refusal Patent event date: 20060802 Patent event code: PB09011R01I Comment text: Amendment to Specification, etc. Patent event date: 20060308 Patent event code: PB09011R02I |
|
| B701 | Decision to grant | ||
| PB0701 | Decision of registration after re-examination before a trial |
Patent event date: 20061002 Comment text: Decision to Grant Registration Patent event code: PB07012S01D Patent event date: 20060904 Comment text: Transfer of Trial File for Re-examination before a Trial Patent event code: PB07011S01I |
|
| GRNT | Written decision to grant | ||
| PR0701 | Registration of establishment |
Comment text: Registration of Establishment Patent event date: 20061221 Patent event code: PR07011E01D |
|
| PR1002 | Payment of registration fee |
Payment date: 20061221 End annual number: 3 Start annual number: 1 |
|
| PG1601 | Publication of registration | ||
| LAPS | Lapse due to unpaid annual fee | ||
| PC1903 | Unpaid annual fee |
Termination category: Default of registration fee Termination date: 20101110 |