KR100269144B1 - An actuator for optical pick-up - Google Patents

An actuator for optical pick-up Download PDF

Info

Publication number
KR100269144B1
KR100269144B1 KR1019970076372A KR19970076372A KR100269144B1 KR 100269144 B1 KR100269144 B1 KR 100269144B1 KR 1019970076372 A KR1019970076372 A KR 1019970076372A KR 19970076372 A KR19970076372 A KR 19970076372A KR 100269144 B1 KR100269144 B1 KR 100269144B1
Authority
KR
South Korea
Prior art keywords
bobbin
electromagnets
actuator
permanent magnets
pair
Prior art date
Application number
KR1019970076372A
Other languages
Korean (ko)
Other versions
KR19990056377A (en
Inventor
이종규
Original Assignee
윤종용
삼성전자주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 윤종용, 삼성전자주식회사 filed Critical 윤종용
Priority to KR1019970076372A priority Critical patent/KR100269144B1/en
Publication of KR19990056377A publication Critical patent/KR19990056377A/en
Application granted granted Critical
Publication of KR100269144B1 publication Critical patent/KR100269144B1/en

Links

Images

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
    • G11B7/08—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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0935—Details of the moving parts
    • 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
    • G11B7/0925—Electromechanical actuators for lens positioning
    • G11B7/0933—Details of stationary parts
    • 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
    • G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
    • G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
    • G11B7/1372—Lenses
    • G11B7/1374—Objective lenses
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/02—Permanent magnets [PM]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

PURPOSE: An optical pickup actuator is provided to prevent vibration of a bobbin by using an electromagnet. CONSTITUTION: Electromagnets(30a,30b,30c,30d) are installed on a base(20) in a symmetric state about an inner coil portion of tracking coils(26a,26b). Herein, permanent magnets(27a,27b) and external yokes(28a,28b) are located between both surfaces of a bobbin(23). Thus, the electromagnets face an external coil portion of each tracking coil. One magnetic pole of the electromagnets face toward the bobbin, and the other magnetic pole face a direction separated from the bobbin. Then, a driving unit(31) flows AC to each electromagnets according to a command from a control unit. Therefore, vibration of the bobbin is prevented.

Description

광픽업용 액츄에이터{An actuator for optical pick-up}Actuator for optical pickup {An actuator for optical pick-up}

본 발명은 광픽업용 액츄에이터에 관한 것으로서, 상세하게는 관성제어수단을 마련하여 그 관성력에 의해 대물렌즈가 흔들리는 것을 방지한 광픽업용 액츄에이터에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator for optical pickup, and more particularly, to an optical pickup actuator provided with an inertial control means to prevent the objective lens from being shaken by the inertial force.

일반적으로 광픽업은 기록매체인 디스크의 반경 방향으로 이동하면서 비접촉식으로 디스크에 정보를 기록 및/또는 재생하는 장치로서, 광원에서 출사된 광을 집속하여 디스크에 광스폿을 형성하는 대물렌즈를 구비한다. 이 대물렌즈는 액츄에이터에 설치되며 광검출기에서 검출된 트랙 오차신호와 포커스 오차신호를 근거로 디스크에 광스폿을 형성하도록 디스크의 트랙 방향과 포커스 방향으로 움직이게 된다.In general, optical pickup is a device for recording and / or reproducing information on a disc in a non-contact manner while moving in a radial direction of a disc, which is a recording medium. . The objective lens is mounted on the actuator and moves in the track direction and the focus direction of the disc to form an optical spot on the disc based on the track error signal and the focus error signal detected by the photodetector.

종래 광픽업용 액츄에이터는, 도 1 및 도 2에 도시된 바와 같이, 베이스(1)와, 이 베이스(1)에 고정된 홀더(2)와, 대물렌즈(3)를 고정하는 보빈(4)과, 이 보빈(4)을 홀더(2)에 연결시키는 서스펜션(5)과, 보빈(4)을 트랙 방향 또는 포커스 방향으로 움직이는 자기구동수단을 구비한다.As shown in FIGS. 1 and 2, a conventional optical pickup actuator includes a base 1, a holder 2 fixed to the base 1, and a bobbin 4 for fixing the objective lens 3. And a suspension 5 for connecting the bobbin 4 to the holder 2, and magnetic drive means for moving the bobbin 4 in the track direction or the focus direction.

이 자기구동수단은 보빈(4)의 외측에 감겨지는 포커스코일(6)과, 이 포커스코일(6)에 부착된 트랙킹코일(7)과, 한 쌍의 영구자석(8a,8b)을 포함한다. 여기서, 트랙킹코일(7)은 한 쌍의 영구자석(8a,8b) 각각과 마주보도록 포커스코일(6)에 부착된다. 한편, 한 쌍의 외측요크(9a,9b)는 베이스(1)에 설치되고 영구자석(8a,8b) 각각을 고정하고, 한 쌍의 내측요크(10a,10b)는 베이스(1)에 고정되고 포커스코일(6)과 보빈(4) 사이에 위치되어 그 보빈(4)의 움직임을 가이드 한다.The magnetic drive means includes a focus coil 6 wound on the outside of the bobbin 4, a tracking coil 7 attached to the focus coil 6, and a pair of permanent magnets 8a and 8b. . Here, the tracking coil 7 is attached to the focus coil 6 so as to face each of the pair of permanent magnets 8a and 8b. On the other hand, a pair of outer yokes (9a, 9b) is installed on the base (1) and fixed to each of the permanent magnets (8a, 8b), a pair of inner yokes (10a, 10b) are fixed to the base (1) It is located between the focus coil 6 and the bobbin 4 to guide the movement of the bobbin 4.

이와 같이 구성된 종래 광픽업용 액츄에이터는, 보빈(4)의 외측에 감기는 포커스코일(6) 및 이 포커스코일(6)에 부착된 트랙킹코일(7)에 도 3에 도시된 바와 같이, 전류가 A 방향으로 인가되면, 그 전류와 영구자석(8a)에 의해 B 방향으로 전자기력이 발생된다. 이 전자기력의 작용 방향에 따라 베이스(1)에 설치된 홀더(2)에 서스펜션(5)으로 연결되어 지지된 보빈(4)이 내측요크(10a,10b)에 가이드 되어 수직 또는 수평 방향으로 이동된다. 여기서 영구자석의 자력은 지면으로 들어가는 방향으로 형성된다고 가정한다. 따라서, 보빈(4)에 장착된 대물렌즈(3)가 포커스 및 트랙킹 동작을 수행하게 된다.In the conventional optical pickup actuator configured as described above, the current is applied to the focus coil 6 wound on the outside of the bobbin 4 and the tracking coil 7 attached to the focus coil 6, as shown in FIG. When applied in the A direction, electromagnetic force is generated in the B direction by the current and the permanent magnet 8a. The bobbin 4, which is connected to the holder 2 provided on the base 1 by the suspension 5 and supported by the electromagnetic force, is guided to the inner yokes 10a and 10b and moved in the vertical or horizontal direction. It is assumed here that the magnetic force of the permanent magnet is formed in the direction of entering the ground. Therefore, the objective lens 3 mounted on the bobbin 4 performs the focusing and tracking operation.

이 때, 광픽업이 디스크 드라이브에서 데이터를 빠른 속도로 읽기 위해서 상기 자기구동수단에 의해 액츄에이터가 B 방향으로 움직일 때, 그 관성에 의해 액츄에이터가 흔들리게 되므로, 대물렌즈가 신속하고 안정된 상태로 목표 어드레스를 찾아가는 데 저해 요소가 된다.At this time, when the actuator moves in the B direction by the magnetic driving means to read the data from the disk drive at a high speed, the actuator is shaken by the inertia, so that the objective lens is quickly and stably in the target address. It is a deterrent to getting to.

본 발명은 상기 문제점을 감안하여 착상된 것으로서, 전자석을 이용하여 보빈의 흔들림을 방지하는 구조를 가진 광픽업용 액츄에이터를 제공하는데 그 목적이 있다.The present invention has been conceived in view of the above problems, and an object thereof is to provide an actuator for an optical pickup having a structure for preventing the shaking of the bobbin by using an electromagnet.

도 1은 종래 광픽업용 액츄에이터를 도시한 개략적 분리사시도.1 is a schematic exploded perspective view showing a conventional optical pickup actuator.

도 2는 도 1의 평면도.2 is a plan view of FIG.

도 3은 종래 광픽업용 액츄에이터의 자기구동수단 부위의 동작을 설명하는 개략도.Figure 3 is a schematic diagram illustrating the operation of the magnetic drive means portion of the conventional optical pickup actuator.

도 4는 본 발명의 바람직한 실시예에 따른 광픽업용 액츄에이터를 보인 개략적 사시도.4 is a schematic perspective view showing an actuator for an optical pickup according to a preferred embodiment of the present invention.

도 5는 도 4의 평면도.5 is a plan view of FIG. 4.

도 6은 본 발명의 바람직한 실시예에 따른 광픽업용 액츄에이터의 관성제어수단 부위의 동작을 설명하는 개략도.Figure 6 is a schematic diagram illustrating the operation of the portion of the inertial control means of the optical pickup actuator according to a preferred embodiment of the present invention.

<도면의 주요부분에 대한 부호의 설명＞<Explanation of symbols for the main parts of the drawings>

20...베이스 21...홀더 22...대물렌즈20 Base 21 Holder 22 Objective lens

23...보빈 24...서스펜션 25...포커스코일23 Bobbin 24 Suspension 25 Poker coil

26a.26b.26c.26d...트랙킹코일 27a.27b...영구자석26a.26b.26c.26d.Tracking Coil 27a.27b ... Permanent Magnet

28a.28b...외측요크 29a.29b...내측요크28a.28b ... Outer yoke 29a.29b ... Inner yoke

30a.30b.30c.30d...전자석 31...구동부30a.30b.30c.30d ... Electromagnetic 31 ... Driver

상기 목적을 달성하기 위한 본 발명은, 홀더가 설치된 베이스; 대물렌즈가 설치되며, 한 쌍의 관통공이 마련된 보빈; 상기 보빈을 탄력적으로 지지하면서 상기 보빈을 상기 홀더에 연결시키는 서스펜션; 상기 보빈의 외측에 감겨지는 포커스코일과, 상기 베이스에 설치된 한 쌍의 영구자석, 상기 영구자석에 각각 대면하도록 상기 포커스코일의 측면에 부착된 4개의 트랙킹코일을 구비하며, 상기 대물렌즈를 디스크의 트랙킹 방향 또는 포커스 방향으로 움직이도록 구동하는 자기구동수단; 상기 보빈의 관성력에 의한 상기 대물렌즈의 흔들림을 제어하기 위해 상기 한 쌍의 영구자석을 중심으로 그 양측에 설치된 4개의 전자석; 및 상기 전자석의 자극의 방향 및 자기력을 조절하는 구동부;를 구비한다.The present invention for achieving the above object, the holder is installed; An bobbin in which an objective lens is installed and a pair of through holes is provided; A suspension that connects the bobbin to the holder while elastically supporting the bobbin; A focus coil wound on the outside of the bobbin, a pair of permanent magnets installed on the base, and four tracking coils attached to the side of the focus coil so as to face the permanent magnets, respectively. Magnetic drive means for driving to move in the tracking direction or the focus direction; Four electromagnets installed at both sides of the pair of permanent magnets to control the shaking of the objective lens due to the inertia force of the bobbin; And a driver configured to adjust the direction and magnetic force of the magnetic pole of the electromagnet.

이하, 본 발명의 바람직한 실시예에 따른 광픽업용 엑츄에이터를 첨부된 도면을 참조하여 상세히 설명한다.Hereinafter, an optical pickup actuator according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

도 4 내지 도 5에 도시된 바와 같이, 본 발명의 바람직한 실시예에 따른 광픽업용 액츄에이터(100)는, 베이스(20)와, 이 베이스(20)에 설치된 홀더(21)와, 대물렌즈(22)를 고정하는 보빈(23)과, 상기 보빈(23)을 홀더(21)에 연결시키는 서스펜션(24)과, 자기력에 의해 보빈(23)을 움직이는 자기구동수단 및 보빈의 흔들림을 방지하기 위한 관성제어수단을 포함한다.4 to 5, the optical pickup actuator 100 according to the preferred embodiment of the present invention includes a base 20, a holder 21 installed on the base 20, and an objective lens ( The bobbin 23 for fixing the 22, the suspension 24 for connecting the bobbin 23 to the holder 21, the magnetic drive means for moving the bobbin 23 by magnetic force and for preventing the shaking of the bobbin And inertial control means.

이 자기구동수단은 포커스코일(25)과, 트랙킹코일(26a,26b,26c,26d) 및 한 쌍의 영구자석(27)을 포함한다.The magnetic drive means includes a focus coil 25, tracking coils 26a, 26b, 26c, and 26d and a pair of permanent magnets 27.

포커스코일(25)은 보빈(4)의 외측에 감겨져 보빈(23)을 디스크의 포커스 방향으로 움직일 수 있도록 한다. 트랙킹코일(26a,26b,26c,26d)은 상기 포커스코일(25)에 부착된다. 즉, 후술하는 한 쌍의 영구자석(27) 각각에 대칭적으로 대향되도록 포커스코일(25)에 부착되어 보빈(23)을 디스크의 트랙 방향으로 움직이게 한다. 한 쌍의 영구자석(27a,27b)은 트랙킹코일(26a,26b,26c,26d) 각각과 마주보도록 외측요크(28a,28b)에 설치되어 상기 포커스코일(25) 또는 트랙킹코일(26a,26b,26c,26d)에 흐르는 전류의 방향에 따라 일정한 자기장을 형성한다. 한편, 한 쌍의 내측요크(29a,29b)는 베이스(20)에 고정되어 포커스코일(25)과 보빈(23) 사이에 위치되어 그 보빈(23)의 움직임을 가이드 한다.The focus coil 25 is wound on the outside of the bobbin 4 to move the bobbin 23 in the focusing direction of the disk. Tracking coils 26a, 26b, 26c, and 26d are attached to the focus coil 25. That is, it is attached to the focus coil 25 so as to be symmetrically opposed to each of the pair of permanent magnets 27 to be described later to move the bobbin 23 in the track direction of the disc. The pair of permanent magnets 27a and 27b are installed on the outer yokes 28a and 28b to face the tracking coils 26a, 26b, 26c and 26d, respectively, so that the focus coil 25 or the tracking coils 26a and 26b, A constant magnetic field is formed in accordance with the direction of the current flowing through 26c and 26d). On the other hand, a pair of inner yoke (29a, 29b) is fixed to the base 20 is located between the focus coil 25 and the bobbin 23 to guide the movement of the bobbin (23).

본 발명의 특징부인 상기 관성제어수단은, 전자석(30a,30b,30c,30d)과, 이 전자석을 구동시키는 구동부(31)를 포함한다.The inertial control means, which is a feature of the present invention, includes electromagnets 30a, 30b, 30c, 30d and a drive part 31 for driving the electromagnets.

도 6에 도시된 바와 같이, 상기 전자석(30a,30b,30c,30d)은 보빈(23)의 양측면 각각에 대해 영구자석(27a,27b) 및 외측요크(28a,28b)를 사이에 두고 트랙킹코일(26a)(26b)의 내측코일부(260b)를 중심으로 대칭되도록 베이스(20) 위에 설치된다. 따라서, 전자석(30a,30b,30c,30d)은 각 트랙킹코일(26a,26b)의 외측코일부(260a)와 마주하도록 배치된다. 본 실시예에서는 전자석(30a,30b,30c,30d)으로서 두 쌍의 솔레노이드 형태인 것이 바람직하다. 상기 각각의 전자석(30a,30b,30c,30d)의 어느 하나의 자극은 보빈(23) 쪽으로 향하고 다른 하나의 자극은 보빈(23) 쪽으로부터 멀어지는 방향을 향하도록 배치된다.As shown in FIG. 6, the electromagnets 30a, 30b, 30c, and 30d have tracking coils between the permanent magnets 27a and 27b and the outer yokes 28a and 28b, respectively, on both sides of the bobbin 23. FIG. It is provided on the base 20 so as to be symmetric about the inner coil part 260b of the 26a and 26b. Accordingly, the electromagnets 30a, 30b, 30c, and 30d are disposed to face the outer coil portions 260a of the tracking coils 26a and 26b. In the present embodiment, the electromagnets 30a, 30b, 30c, and 30d are preferably in the form of two pairs of solenoids. One of the magnetic poles of each of the electromagnets 30a, 30b, 30c, and 30d is disposed toward the bobbin 23 and the other of the magnetic poles faces away from the bobbin 23 side.

구동부(31)는 보빈이 관성력에 의해 흔들리는 것을 방지하기 위해 제어부(미도시)의 명령에 따라 각각의 전자석(30a,30b,30c,30d)에 교류 전류를 흘려준다.The driver 31 supplies an alternating current to each of the electromagnets 30a, 30b, 30c, and 30d according to a command of a controller (not shown) in order to prevent the bobbin from being shaken by inertial force.

이와 같이 구성된 본 발명에 따른 광픽업용 액츄에이터의 흔들림 방지 동작을 도 6을 참조하여 설명한다. 먼저, 보빈(23)의 외측에 포커스코일(25)이 감기고, 이 포커스코일(25)의 일측면에는 좌우로 각각 트랙킹코일(26a,26b)이 부착되어 있다. 물론, 그에 대향되는 방향에 트랙킹코일(26c,26d)이 부착되어 있지만, 어느 한 방향에 대해서만 생각하기로 한다. 여기서, 트랙킹코일(26a)에는 전류를 반시계 방향으로 인가시키고, 그에 대응되는 트랙킹코일(26b)에는 시계 방향으로 전류를 인가시킨다. 그러면, 트랙킹코일(26a,26b)의 두 내측코일부(260b)는 상방향(B 방향)으로, 두 외측코일부(260a)는 하방향(B' 방향)으로 각각 전류가 흐르게 된다. 또한, 영구자석(27a)은 지면으로 들어가는 방향으로 자기장을 형성하여 최종적으로 액츄에이터의 보빈(23)은 A 방향으로 이동하게 된다.An anti-shake operation of the optical pickup actuator according to the present invention configured as described above will be described with reference to FIG. 6. First, the focus coil 25 is wound around the outside of the bobbin 23, and tracking coils 26a and 26b are attached to one side of the focus coil 25 from side to side, respectively. Of course, the tracking coils 26c and 26d are attached to the opposite directions, but only one of the directions will be considered. Here, the current is applied to the tracking coil 26a in a counterclockwise direction, and the current is applied to the tracking coil 26b in a clockwise direction. Then, the two inner coil parts 260b of the tracking coils 26a and 26b flow in the upward direction (B direction) and the two outer coil parts 260a in the downward direction (B 'direction), respectively. In addition, the permanent magnet 27a forms a magnetic field in the direction of entering the ground, and finally the bobbin 23 of the actuator moves in the A direction.

한편, 상기 전자석(30a) 및 전자석(30b)은 그 자극이 지면으로 들어가는 방향으로 형성되도록 구동부(31)를 제어시킨다. 그러면, 보빈(23)이 A 방향으로 이동되는 것을 억제시키기 위해 각각의 전자석(30a,30b)에 소정의 전류를 인가시킨다. 이때, 전자석(30a,30b)의 자기장의 세기를 영구자석(27a)의 자기장의 세기 보다 작도록 셋팅하게 되면 그 힘의 평형 지점에서 보빈(23)을 정지시킬 수 있다.On the other hand, the electromagnet (30a) and the electromagnet (30b) controls the drive unit 31 so that the magnetic pole is formed in the direction to enter the ground. Then, a predetermined current is applied to each of the electromagnets 30a and 30b to suppress the bobbin 23 from moving in the A direction. At this time, if the strength of the magnetic field of the electromagnets (30a, 30b) is set to be smaller than the strength of the magnetic field of the permanent magnet (27a) it can stop the bobbin 23 at the balance point of the force.

상술한 바와 같이, 본 발명에 따른 광픽업용 액츄에이터는 다음과 같은 효과를 가진다.As described above, the optical pickup actuator according to the present invention has the following effects.

즉, 관성제어수단에 의해 대물렌즈가 설치된 보빈의 흔들림을 방지할 수 있으므로 광픽업의 정확한 트랙킹 제어가 가능해 진다.In other words, since the inertia control means can prevent the bobbin provided with the objective lens from being shaken, accurate tracking control of the optical pickup becomes possible.

Claims (1)

홀더가 설치된 베이스;A base on which the holder is installed; 대물렌즈가 설치되며, 한 쌍의 관통공이 마련된 보빈;An bobbin in which an objective lens is installed and a pair of through holes is provided; 상기 보빈을 탄력적으로 지지하면서 상기 보빈을 상기 홀더에 연결시키는 서스펜션;A suspension that connects the bobbin to the holder while elastically supporting the bobbin; 상기 보빈의 외측에 감겨지는 포커스코일과, 상기 베이스에 설치된 한 쌍의 영구자석, 상기 영구자석에 각각 대면하도록 상기 포커스코일의 측면에 부착된 4개의 트랙킹코일을 구비하며, 상기 대물렌즈를 디스크의 트랙킹 방향 또는 포커스 방향으로 움직이도록 구동하는 자기구동수단;A focus coil wound on the outside of the bobbin, a pair of permanent magnets installed on the base, and four tracking coils attached to the side of the focus coil so as to face the permanent magnets, respectively. Magnetic drive means for driving to move in the tracking direction or the focus direction; 상기 보빈의 관성력에 의한 상기 대물렌즈의 흔들림을 제어하기 위해 상기 한 쌍의 영구자석을 중심으로 그 양측에 각각 설치된 4개의 전자석; 및Four electromagnets respectively installed on both sides of the pair of permanent magnets to control the shaking of the objective lens due to the inertia force of the bobbin; And 상기 전자석의 자극의 방향 및 자기력을 조절하는 구동부;를 구비하는 것을 특징으로 하는 광픽업용 액츄에이터.Actuator for optical pickup, comprising; a drive unit for adjusting the direction and magnetic force of the magnetic pole of the electromagnet.
KR1019970076372A 1997-12-29 1997-12-29 An actuator for optical pick-up KR100269144B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019970076372A KR100269144B1 (en) 1997-12-29 1997-12-29 An actuator for optical pick-up

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019970076372A KR100269144B1 (en) 1997-12-29 1997-12-29 An actuator for optical pick-up

Publications (2)

Publication Number Publication Date
KR19990056377A KR19990056377A (en) 1999-07-15
KR100269144B1 true KR100269144B1 (en) 2000-10-16

Family

ID=19529231

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019970076372A KR100269144B1 (en) 1997-12-29 1997-12-29 An actuator for optical pick-up

Country Status (1)

Country Link
KR (1) KR100269144B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100477596B1 (en) * 1997-08-25 2005-07-11 엘지전자 주식회사 Optical Pickup Actuator and Manufacturing Method
KR20020006828A (en) * 2000-07-13 2002-01-26 구자홍 Multi-axis driving actuator using electromagnet and control method for its tilt

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08203105A (en) * 1995-01-26 1996-08-09 Matsushita Electric Ind Co Ltd Objective lens driving device

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08203105A (en) * 1995-01-26 1996-08-09 Matsushita Electric Ind Co Ltd Objective lens driving device

Also Published As

Publication number Publication date
KR19990056377A (en) 1999-07-15

Similar Documents

Publication Publication Date Title
US5136558A (en) Two axis electromagnetic actuator
US5177640A (en) Two-axis moving coil actuator
KR100498443B1 (en) Actuator used for optical pickup
JP2004234832A (en) Tilt drive capable optical pickup actuator and optical recording and/or reproducing equipment and method employing the same
KR100555527B1 (en) Optical pickup actuator having high sensibility and optical recording and/or reproducing apparatus employing it
US6714364B2 (en) Optical pick-up actuator
US5745447A (en) Three-axis moving actuator for optical pick-up
KR100269144B1 (en) An actuator for optical pick-up
JP2002197698A (en) Optical head device
EP1394784B1 (en) Objective lens driving apparatus used with an optical pickup
JP2005522812A (en) Read / write head for optical disc drive and optical disc drive having such read / write head
US20050146999A1 (en) Objective lens driving device enabling speed-up of optical disk drive
JPH11306566A (en) Optical pickup actuator of flux concentration type magnetization system
US6996039B2 (en) Optical pick-up actuator
US7428112B2 (en) Objective lens driving device having damper portions capable of obtaining a moderate damping effect
KR100713544B1 (en) Optical pick-up actuator
KR100669626B1 (en) Optical pick-up acatuator
KR100438276B1 (en) Optical pick-up actuator for radial tilting drive
KR200159904Y1 (en) Magnetic flux induction structure of actuator pickup cover
KR100524998B1 (en) Optical pickup actuator
KR100636123B1 (en) Actuator for optical pickup
KR0181816B1 (en) A compact optical pick up actuator
KR20020006828A (en) Multi-axis driving actuator using electromagnet and control method for its tilt
JP2000276754A (en) Objective lens driving device
JPH1011776A (en) Optical pickup device

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20090714

Year of fee payment: 10

LAPS Lapse due to unpaid annual fee