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1. (WO2007000738) TANGENTIAL DISC TILT MEASUREMENT AND CORRECTIVE ACTION
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/2007/000738 International Application No.: PCT/IB2006/052132
Publication Date: 04.01.2007 International Filing Date: 27.06.2006
IPC:
G11B 7/095 (2006.01)
G PHYSICS
11
INFORMATION STORAGE
B
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
7
Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power; Record carriers therefor
08
Disposition or mounting of heads or light sources relatively to record carriers
09
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
095
specially adapted for discs, e.g. for compensation of eccentricity or wobble
Applicants:
KONINKLIJKE PHILIPS ELECTRONICS, N.V. [NL/NL]; Groenewoudseweg 1 NL-5621 BA Eindhoven, NL (AllExceptUS)
U.S. PHILIPS CORPORATION [US/US]; 1251 Avenue Of The Americas New York, New York 10020, US (AE)
VERSCHUREN, Coen Adrianus [NL/NL]; NL (UsOnly)
Inventors:
VERSCHUREN, Coen Adrianus; NL
Common
Representative:
KONINKLIJKE PHILIPS ELECTRONICS, N.V.; C/o Belk, Michael E. P.O. Box 3001 345 Scarborough Road Briarcliff Manor, NY 10510-8001, US
Priority Data:
60/695,06729.06.2005US
Title (EN) TANGENTIAL DISC TILT MEASUREMENT AND CORRECTIVE ACTION
(FR) MESURE D'INCLINAISON DE DISQUE TANGENTIELLE ET ACTION CORRECTIVE CORRESPONDANTE
Abstract:
(EN) A method and system within optical disc player/recorders that measures tangential disc tilt and provides for responsive action. Optical discs inevitably show some degree of warping. By determining the tangential tilt angles over the disc and comparing these tilt angles with a prescribed maximum allowed tilt angle, responsive actions are taken if the maximum tilt angle is exceeded to stop operation or adjust the tangential lens tilt to compensate for the tangential disc tilt usig with a bandwidth suitable for high rotational speeds.
(FR) L'invention concerne une méthode et un système monté à l'intérieur d'un lecteur/enregistreur de disques optiques, permettant de mesurer une inclinaison de disque tangentielle et de fournir une rétroaction appropriée. Les disques optiques présentent inévitablement un certain degré de déformation. La détermination d'angles d'inclinaison tangentielle sur le disque, et la comparaison de ces angles d'inclinaison à un angle d'inclinaison autorisé maximum prescrit permet de mettre en oeuvre des actions correctives, si l'angle d'inclinaison maximal est dépassé, pour arrêter le fonctionnement ou pour régler une inclinaison de lentille tangentielle afin de compenser l'inclinaison de disque tangentielle à l'aide d'une largeur de bande appropriée à des vitesses de rotation élevées.
front page image
Designated States: AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BW, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, EG, ES, FI, GB, GD, GE, GH, GM, HN, HR, HU, ID, IL, IN, IS, JP, KE, KG, KM, KN, KP, KR, KZ, LA, LC, LK, LR, LS, LT, LU, LV, LY, MA, MD, MG, MK, MN, MW, MX, MZ, NA, NG, NI, NO, NZ, OM, PG, PH, PL, PT, RO, RS, RU, SC, SD, SE, SG, SK, SL, SM, SY, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, ZA, ZM, ZW
African Regional Intellectual Property Organization (ARIPO) (BW, GH, GM, KE, LS, MW, MZ, NA, SD, SL, SZ, TZ, UG, ZM, ZW)
Eurasian Patent Organization (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM)
European Patent Office (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IS, IT, LT, LU, LV, MC, NL, PL, PT, RO, SE, SI, SK, TR)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
KR1020080033296EP1905023JP2009500775US20080165649CN101213600MYPI 20063055
IN333/CHENP/2008