Optical pickup actuator and optical recording and/or reproducing apparatus and method for the same
| Title: | Optical pickup actuator and optical recording and/or reproducing apparatus and method for the same |
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| Patent Number: | 7,817,505 |
| Publication Date: | October 19, 2010 |
| Appl. No: | 10/720744 |
| Application Filed: | November 25, 2003 |
| Abstract: | An optical pickup actuator and an optical recording and/or reproducing apparatus and method using the same. The optical pickup actuator includes a blade, a plurality of suspensions, first and second coil members, and a magnet member. An objective lens is placed on one side of the blade. Each of the suspensions is coupled at one end to the blade and fixed at the other end to a holder provided at one side of a base, such that the suspensions movably support the blade. The first and second coil members are installed on the base to be separated from each other, with the magnet member being installed on the blade between the first and second coil members. |
| Inventors: | Kang, Hyung-Joo (Seoul, KR); Lee, Young-bin (Seoul, KR) |
| Assignees: | Samsung Electronics Co., Ltd. (Suwon-Si, KR) |
| Claim: | 1. An optical pickup actuator, comprising: a blade with an objective lens; a plurality of suspensions coupled at one end to the blade and fixed at another end to a holder, provided at one side of a base, such that the suspensions movably support the blade; a focusing coil member and a tracking coil member installed on the base, separated from each other, in an asymmetrical relationship with respect to the lens; and a single magnet member installed on the blade between the focusing coil member and the tracking coil member, wherein the focusing coil member, the tracking coil member and the single magnet member are installed on one side of the objective lens in an asymmetrical relationship with respect to the lens, and wherein the blade on which the single magnet member is installed is not in direct communication with the focusing coil and the tracking coil installed on the base to avoid having the blade receive heat generated from current applied to the coil members. |
| Claim: | 2. The optical pickup actuator of claim 1 , further comprising a pair of tilt driving coil members. |
| Claim: | 3. The optical pickup actuator of claim 2 , wherein the pair of tilt driving coil members are installed under the focusing coil member. |
| Claim: | 4. The optical pickup actuator of claim 1 , wherein the magnet member is a surface polarization magnet. |
| Claim: | 5. The optical pickup actuator of claim 1 , wherein the focusing and tracking coil members are Fine Pattern Coils (FPCs). |
| Claim: | 6. An optical recording and/or reproducing apparatus, comprising: an optical pickup having an actuator for driving an objective lens, and movably installed in a radial direction of a recording medium, and records and/or reproduces information to/from the recording medium; and a controller controlling a focusing servo and a tracking servo of the optical pickup, wherein the optical pickup actuator includes: a blade with an objective lens; a plurality of suspensions coupled at one end to the blade and fixed at another end to a holder, provided at one side of a base, such that the suspensions movably support the blade; a focusing coil member and a tracking coil member installed on the base, separated from each other, in an asymmetrical relationship with respect to the lens; and a single magnet member installed on the blade between the focusing coil member and the tracking coil member, wherein the focusing coil member, the tracking coil member and the single magnet member are installed on one side of the objective lens in an asymmetrical relationship with respect to the lens, and wherein the blade on which the single magnet member is installed is not in direct communication with the focusing coil and the tracking coil installed on the base to avoid having the blade receive heat generated from current applied to the coil members. |
| Claim: | 7. The optical recording and/or reproducing apparatus of claim 6 , further comprising a pair of tilt driving coil members. |
| Claim: | 8. The optical recording and/or reproducing apparatus of claim 7 , wherein the pair of tilt driving coil members are installed under the focusing coil member. |
| Claim: | 9. The optical recording and/or reproducing apparatus of claim 6 , wherein the magnet member is a surface polarization magnet. |
| Claim: | 10. The optical recording and/or reproducing apparatus of claim 6 , wherein the focusing and tracking coil members are Fine Pattern Coils (FPCs). |
| Current U.S. Class: | 369/4/414 |
| Patent References Cited: | 5488603 January 1996 Tomita et al. 5905255 May 1999 Wakabayashi et al. 6130418 October 2000 Van Rosmalen et al. 6181670 January 2001 Nagasato 6341104 January 2002 Yamaguchi et al. 6829202 December 2004 Jeong 7075872 July 2006 Matsui 7126744 October 2006 Turner et al. 7310289 December 2007 Pae et al. 2002/0054559 May 2002 Choi 2003/0198148 October 2003 Choi 2004/0130976 July 2004 Tanaka 2004/0151085 August 2004 Funakoshi et al. 58-062832 April 1983 58-098850 June 1983 11-203697 July 1999 2002-109766 April 2002 |
| Other References: | European Search Report issued May 8, 2007 in corresponding European Patent Application No. 03 257 423.8-1232. cited by other European Search Report issued Jan. 8, 2007 in corresponding European Patent Application 03 25 7423. cited by other Chinese Office Action issued Jun. 9, 2006 in Related Chinese Application No. 2003101209618. cited by other |
| Assistant Examiner: | Gupta, Parul |
| Primary Examiner: | Negrón, Daniell L |
| Attorney, Agent or Firm: | Staas & Halsey LLP |
| Accession Number: | edspgr.07817505 |
| Database: | USPTO Patent Grants |
| Language: | English |
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