Spiral Or Helical Track Patents (Class 369/111)
  • Patent number: 10410667
    Abstract: There are provided an optical disk from which high-density data is reproduced and a reproduction apparatus that reproduces data from such an optical disk having high-density data recorded thereon. A photo-detecting section has two split detectors A and B in the direction of tracks on the disk. A signal processing section generates a TPP (Tangential Push-pull) signal made of a differential signal derived from detection signals from the detectors A and B, and further generates a reproduced signal by extracting from the TPP signal a high-frequency component signal in a record signal recorded on the disk. The signal processing section reconstitutes a high-frequency component signal in the record signal recorded on the disk by frequency-shifting the TPP signal obtained as a readout signal from a superimposed signal having the carrier signal and the record signal superimposed with each other.
    Type: Grant
    Filed: November 21, 2016
    Date of Patent: September 10, 2019
    Assignee: SONY CORPORATION
    Inventors: Kimihiro Saito, Toshihiro Horigome
  • Patent number: 9824724
    Abstract: According to one embodiment, a magnetic recording and reproducing device includes a magnetic recording medium including a plurality of recording tracks, a magnetic head, and a controller. The plurality of recording tracks includes a first track. The controller causes the magnetic head to implement a first recording operation of recording first information in at least two of a plurality of first track recording components included in the first track. The controller causes the magnetic head to implement a first reproduction operation of reproducing the first information from a first information reproducing/recording component of one of the at least two of the plurality of first track recording components.
    Type: Grant
    Filed: August 23, 2016
    Date of Patent: November 21, 2017
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Katsuya Sugawara, Kenichiro Yamada
  • Patent number: 9502067
    Abstract: The present invention provides an improved file system format for an optical disc to help prevent illegal copying of multimedia content, where certain non-readable data record is placed into increased measured length of a multimedia data block; disc made pursuant to present format allows normal playback with very low level noise that would not affect the user enjoyment of viewing/listening the movie or music content on the multimedia disc.
    Type: Grant
    Filed: April 21, 2016
    Date of Patent: November 22, 2016
    Assignee: VINPOWER, INC.
    Inventors: Shuo Wei Chang, Liao-Hsuan Kuo, Chun-Sung Wu
  • Patent number: 9392196
    Abstract: An image sensor frame rate can be increased by “interlaced” mode operation whereby only half the number of lines of an image is transported to the readout circuitry. This halves the integration time but also halves the resolution of the sensor. Accordingly, in one embodiment, an image sensor operated in an interlaced fashion is first exposed to a scene under a first form of illumination (e.g., narrowband illumination), and a first set of alternating (horizontal or vertical) lines constituting half of the pixels is read out of the array; the sensor is then exposed to the same scene under a second form of illumination (e.g., existing ambient illumination with the illumination source turned off), and a second set of alternating lines, representing the other half of the pixel array, is read out. The two images are compared and noise removed from the image obtained under narrowband illumination.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: July 12, 2016
    Assignee: Leap Motion, Inc.
    Inventor: David Holz
  • Patent number: 8717858
    Abstract: An embodiment of the invention, to provide a recording method and a storage medium for BCA data with high reliability for a storage medium and a method for reproducing BCA data from the storage medium, and an information recording apparatus and an information reproducing apparatus. In a conventional optical disk, low reliability data is recorded in a data area of BCA. Thus, the thickness of a film material for use in a recording layer oriented to BCA data or close to the inner periphery of the storage medium in the vicinity thereof is formed in uniform thickness by using a substrate of the storage medium, the substrate being formed by being suctioned by means of adsorbing mechanisms formed in an arc shape so as to integrated two of the adsorbing mechanisms to be adjacent to each other.
    Type: Grant
    Filed: September 2, 2011
    Date of Patent: May 6, 2014
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Takazawa, Seiji Morita, Yasuaki Ootera, Hideo Ando, Naoki Morishita, Kazuyo Umezawa
  • Patent number: 8593917
    Abstract: The present invention relates to a high data density optical recording medium. The invention further relates to an apparatus for reading from such an optical recording medium. The optical recording medium has marks that are arranged in tracks. The tracks have a cross section with a curved shape and protrude above a surface of the optical recording medium.
    Type: Grant
    Filed: October 28, 2010
    Date of Patent: November 26, 2013
    Assignee: Thomson Licensing
    Inventor: Joachim Knittel
  • Patent number: 8576682
    Abstract: Provided are a method and an apparatus to prevent reproducibility of data with respect to an optical information storage medium. The method includes recording patterns with respect to the optical information storage medium using irradiated light so as prevent reproduction of the data. The patterns may cause an error or a malfunction when attempting to access the data of the optical information storage medium so as to prevent the reproduction of the data.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: November 5, 2013
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventor: Won Ik Cho
  • Publication number: 20120182851
    Abstract: Techniques for recording and reading information to/from a recording medium based on positions of a plurality of marks are described herein. Each of the plurality of marks may have the same length. The information may be recorded based on a mark interval between successive marks. Apparatus and a recording medium suitable for use with such techniques are also disclosed.
    Type: Application
    Filed: September 27, 2010
    Publication date: July 19, 2012
    Applicant: Sony Corporation
    Inventors: Kimihiro Saito, Seiji Kobayashi, Junichi Horigome, Toshihiro Horigome, Daisuke Ueda
  • Patent number: 8036072
    Abstract: A holographic recording and reproduction system includes a servo optical path, which is used to provide a servo mechanism, so that holographic interference fringes can be stored continuously into a holographic recording medium, and when the reproduction signals are desired, they can be fetched and obtained swiftly and accurately by making use of the servo mechanism. In addition, the servo light spot of the servo optical path is located on the optical axis of an object lens, thus reducing the image aberrations produced and raising the quality of the signals read for the servo track searching. Moreover, the light intensity distribution of the reference beams reflected by the holographic recording medium is monitored and controlled, as such realizing the analysis and adjustment of the relative distance and inclination angle between the holographic recording and reproduction system and the holographic recording medium.
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: October 11, 2011
    Assignee: Industrial Technology Research Institute
    Inventors: Chih-Ming Lin, Yung-Sung Lan, Tzuan-Ren Jeng
  • Patent number: 8023395
    Abstract: The optical storage medium comprises a substrate layer, a data layer with a mark/space structure arranged in tracks on the substrate layer, and a cover layer. One track comprises positive marks and a neighboring track comprises negative marks. The tracks are arranged in particular as spirals wherein one spiral contains a track with only positive marks and a neighboring spiral contains a track with only negative marks. The positive marks of a track and correspondingly the negative marks of a track are separated each by spaces. The optical storage medium is particularly a read-only optical disc and comprises a mask layer with a super resolution near field structure, wherein the tracks of the data layer are arranged as two spirals, one spiral consisting of positive marks only and the other spiral consisting of negative marks only.
    Type: Grant
    Filed: October 11, 2007
    Date of Patent: September 20, 2011
    Assignee: Thomson Licensing
    Inventors: Joachim Knittel, Stephan Knappmann
  • Patent number: 7852732
    Abstract: A lens apparatus has a focusing lens unit, a separating optical unit disposed on an optical axis of the lens apparatus, a focus detection unit that detects focus condition using a light beam from the separating optical unit, a first drive unit that drives the focusing lens unit based on an output of the focus detection unit, and a second drive unit that drives the separating optical unit. An optical separating surface that the separating optical unit has reflectance that varies continuously in a first direction. The second drive unit drives or moves the separating optical unit in the first direction.
    Type: Grant
    Filed: February 12, 2008
    Date of Patent: December 14, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Isamu Izuhara, Yasuyuki Tomita, Shin-ichiro Yakita
  • Patent number: 7457219
    Abstract: A disc type recording medium on which information is recorded by forming disc tracks thereon, a method of forming the disc tracks, and a recording medium for recording a program executing the method. In the above media and method, data access can be rendered in data frame units. The disc type recording medium includes a data frame composed of a plurality of sync frames. The total number of the sync frames is determined according to the length of the innermost circumference of the disc type recording medium. Accordingly, recoding the additional information in such a data frame format prevents a reduction in a rate of detecting the additional information even when the recording medium is miniaturized.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: November 25, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-seong Shim, Hyun-soo Park, Jin-han Kim
  • Publication number: 20080247296
    Abstract: The present invention relates to an optical storage disk for both read-only and (re-)writable applications comprising a plurality of adjacent track portions with a radial track pattern in which a number of n?2 adjacent track portions repeatedly exhibit non-uniform radial track distances TP1?TP2 . . . ?TPn. The present invention further relates to an optical storage system comprising such a disk and an optical disk drive for it. The drive comprises a beam generator arranged to project a plurality of (n) satellite light spots (S1, . . . , Sn; SL, SM) and one main spot (SR) onto said optical disk. In the system, the sum of the non-uniform radial track distances TP?=TP1+ . . . +TPn is higher than the reciprocal optical cutoff ?/(2 NA) of the beam.
    Type: Application
    Filed: September 13, 2006
    Publication date: October 9, 2008
    Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V.
    Inventor: Bin Yin
  • Patent number: 7342866
    Abstract: Recording timing of a Data segment is set so as to avoid locating a wobble modulated portion as preformat information which indicates information on Physical segments of a recording type optical disc, and a recording start head position of the Data segment to be recorded in a track, in the same area of the track.
    Type: Grant
    Filed: March 9, 2004
    Date of Patent: March 11, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Sumitaka Maruyama, Chosaku Noda
  • Patent number: 7339875
    Abstract: An information storage medium includes a substrate forming a first groove having a depth, and a second groove adjacent to the first groove and different depth from the first groove; and a recording layer formed on the substrate to record information marks, making optical characteristics of the information marks different for each such that diffracted lights from the plurality of marks orthogonally intersect one another.
    Type: Grant
    Filed: February 9, 2004
    Date of Patent: March 4, 2008
    Assignee: Hitachi, Ltd.
    Inventor: Takeshi Maeda
  • Patent number: 7283447
    Abstract: The refractive index of a light transmission layer of an optical disk is set within the range of 1.45 to 1.75, the numerical aperture of a lens emitting laser light which is incident onto the light transmission layer is set to 0.65, and the wavelength range of the laser light is set within the range of 395 to 415 nm. Further, in order that aberrations fall within the range of certain acceptable values, the thickness t of the light transmission layer is set within the range of f(n)?t1?t?f(n)+t2, employing constants t1, t2 determined based on an acceptable value of aberration and function f(n) of the refractive index n.
    Type: Grant
    Filed: September 28, 2006
    Date of Patent: October 16, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Sumitaka Maruyama, Katsuo Iwata, Kazuo Watabe
  • Patent number: 7126906
    Abstract: A disc-shaped optical record carrier includes a first area having a spiral track extending in a first direction from an inner side on the disc, and a second area having a spiral track extending in a second direction opposite to the first direction, from an outer side on the disc located on the same plane as the first area on the disc, wherein one of the first and second areas is assigned a recordable area and the other is assigned a read only area.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: October 24, 2006
    Assignee: Hitachi Maxell, Ltd.
    Inventor: Tamotsu Iida
  • Patent number: 7095700
    Abstract: The present invention separates MTF into a plus frequency region and a minus frequency region and uses the plus frequency region and the minus frequency region to thereby enable an effectively usable frequency region to be doubled in effect. Digital information to be recorded on an optical disk medium is recorded as independent signals of, respectively, a light beam reflected or diffracted forward and a light beam reflected or diffracted backward with respect to a direction of traveling of a track on the optical disk medium. At the time of producing an optical disk medium, digital information is divided into two pieces, a complex modulating signal is generated by changing a plus frequency component and a minus frequency component according to the pieces of the divided digital information, and a laser beam is modulated on the basis of the complex modulating signal.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: August 22, 2006
    Assignee: Sony Corporation
    Inventor: Seiji Kobayashi
  • Patent number: 7075870
    Abstract: A plurality of optical heads each of which comprises an independent light source and optical system are provided on the same side with respect to a recording medium having a plurality of recording layers. Alternatively, with respect to at least one light source in an optical head having a single objective lens and a plurality of light sources, an optical path correction system is provided on an optical path unique to the light source, and while light emitted from one light source is focused on a specific recording layer by shifting of the objective lens, light irradiated from another light source is focused on another recording layer by the optical path correction system. Thus, information can be reproduced from or recorded in a plurality of recording layers simultaneously and an error in focusing of light onto the plurality of recording layers can be suppressed.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: July 11, 2006
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Tetsuya Akiyama, Nobuo Akahira, Kenichi Nishiuchi
  • Patent number: 7054245
    Abstract: A record carrier has substantially parallel tracks having first variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations represent information recorded on the record carrier, this information being recoverable by a controllable type of data processing. A modulation pattern of the second variations represents a code for controlling the type of data processing. In respect of a code track that includes the modulation pattern, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track. Thereby crosstalk due to the second variations is decreased, and at least two tracks have the same modulation pattern. The playback device has a demodulator (50) and a control unit (56) for retrieving the code from at least two tracks.
    Type: Grant
    Filed: March 6, 2003
    Date of Patent: May 30, 2006
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes H. M. Spruit, Gijsbert Joseph Van Den Enden, Johan P. M. G. Linnartz, Johan C. Talstra
  • Patent number: 7031246
    Abstract: An optical disc playback method is provided which includes steps of reading identification data recorded in an optical disc loaded in an optical disc player and starting reading data from a second recording area of the optical disc loaded in the optical disc player when it is determined that the loaded optical disc is a one having at least a first recording area and second recording area, a first lead-in area provided along the inner circumference of the first recording area, a second lead-out area provided along the outer circumference of the first recording area, a second lead-in area provided between the outer circumference of the first lead-out area and second recording area, and a second lead-out area provided along the outer circumference of the second recording area.
    Type: Grant
    Filed: January 31, 2002
    Date of Patent: April 18, 2006
    Assignee: Sony Corporation
    Inventors: Yoichiro Sako, Shunsuke Furukawa
  • Patent number: 7006425
    Abstract: Information is recorded/reproduced by focusing a light beam in/from an optical recording medium capable of forming therein marks for information recording in a plurality of three-dimensional directions including an arbitrary directions and at least depth direction. Specifically, the optical beam is sequentially focused at a recorded mark position adjacent an optically recorded mark position, at which a recording/reproducing operation is started, in any directions regardless of the directionality of the plurality of three-dimensional directions, to cause the focused position of the light beam to describe a predetermined locus having a predetermined rule to rapidly and continuously record/reproduce the information.
    Type: Grant
    Filed: November 30, 1999
    Date of Patent: February 28, 2006
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akiko Hirao, Hideyuki Nishizawa, Takayuki Tsukamoto, Yoshinori Honguh, Kazuki Matsumoto
  • Patent number: 6999398
    Abstract: Information is recorded on an information recording medium such as a magneto-optical recording medium, having two recording tracks arranged alternately, typically in a double spiral manner. The two recording tracks have different recording characteristics and information is firstly recorded on the recording track less liable to cross write, typically on a land section, and subsequently on the recording track more liable to cross write, typically on a groove section.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: February 14, 2006
    Assignees: Canon Kabushiki Kaisha, Matsushita Electric Industrial Co., Ltd.
    Inventors: Masakuni Yamamoto, Yasushi Hozumi, Yasumori Hino
  • Patent number: 6999405
    Abstract: An optical recording medium used as a recording medium for information signals in which, in forming a groove along a recording track, a first groove and a second groove are formed to a first depth x to describe a double helix and a third groove having a second depth y shallower than the first depth x is formed between the first and second groves describing double helices. By setting the phase depths of these grooves to a pre-set range, signals required for tracking servo or seek are obtained to sufficient levels to realize stable tracking servo and seek.
    Type: Grant
    Filed: April 14, 2004
    Date of Patent: February 14, 2006
    Assignee: Sony Corporation
    Inventor: Sohmei Endoh
  • Patent number: 6980495
    Abstract: In an optical recording apparatus having an optical pickup, a rotating section is provided for rotating an optical disk which is formed thereon with a guide groove to define a spiral track having a plurality of rounds. The optical pickup has a light source for generating an optical beam and a diffractive grating for diffracting the optical beam to form a main beam and a pair of sub beams opposite with each other relative to the main beam. The optical pickup is operable for irradiating the main beam to the spiral track with accompanying the pair of the sub beams along apposite sides of the spiral track. A servo section operates the optical pickup to enable the main beam to trace the spiral track based on a tracking error signal derived from return lights of the sub beams reflected back from the optical disk. A recording section modulates the main beam for recording of information onto the spiral track while the optical dick is rotated.
    Type: Grant
    Filed: June 20, 2003
    Date of Patent: December 27, 2005
    Assignee: Yamaha Corporation
    Inventors: Katsuichi Osakabe, Akira Usui, Shinji Aoshima, Hiromitsu Shibata, Masaki Dojun
  • Patent number: 6867955
    Abstract: An arc discharge protection apparatus to prevent arc discharge from occurring in a high voltage output zone caused by abnormal conditions includes an electrode plate to absorb high voltage arc discharge signals released by a voltage boosting unit in the high voltage output zone. A voltage switch unit receives the high voltage arc discharge signals absorbed by the electrode plate and transforms to low voltage arc discharge signals. A rectification unit receives and rectifies the low voltage arc discharge signals and outputs an arc hybrid wave. A trigger unit detects the arc hybrid wave and outputs a trigger signal to stop operation of the control unit or driving unit, thereby prevents arc discharge from causing damage to the surrounding elements resulting from accumulation of heat or sparks.
    Type: Grant
    Filed: August 4, 2003
    Date of Patent: March 15, 2005
    Assignee: Zippy Technology Corp.
    Inventors: Chin-Wen Chou, Eddie Cheng, Kuang-Ming Wu, Chin-Biau Chung
  • Publication number: 20040179455
    Abstract: Recording timing of a Data segment is set so as to avoid locating a wobble modulated portion as preformat information which indicates information on Physical segments of a recording type optical disc, and a recording start head position of the Data segment to be recorded in a track, in the same area of the track.
    Type: Application
    Filed: March 9, 2004
    Publication date: September 16, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Sumitaka Maruyama, Chosaku Noda
  • Publication number: 20040174798
    Abstract: The invention relates to a system for protection against the copying of information for the creation of a protected optical disk.
    Type: Application
    Filed: January 20, 2004
    Publication date: September 9, 2004
    Inventors: Michel Riguidel, Thierry Beuzit
  • Publication number: 20040160884
    Abstract: An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead-in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.
    Type: Application
    Filed: February 5, 2004
    Publication date: August 19, 2004
    Applicant: Samsung Electronics, Co., Ltd.
    Inventors: Kyung-geun Lee, In-sik Park, Du-seop Yoon
  • Publication number: 20040156298
    Abstract: A heat dissipation system for an optical disk drive having a spindle motor, a circuit board, an IC and a bottom cover. The spindle motor has a rotating shaft with a fixing end. The heat dissipation system includes a fixing plate, a frame, a fan, a guide pipe and a guide channel. The spindle motor is disposed on the fixing plate having a through hole and at least one fixing hole. The fixing end of the rotating shaft passes through the through hole. The frame is disposed on the fixing plate and has at least one fixing portion with a predetermined thickness. The fan has a center connected to the fixing end. The guide pipe is disposed between the frame and circuit board to embrace the fan. The guide channel is closely disposed between the circuit board and bottom cover and extends from the circuit board to the IC.
    Type: Application
    Filed: February 2, 2004
    Publication date: August 12, 2004
    Inventor: Hung-Chu Chu
  • Publication number: 20040151106
    Abstract: An optical recording and reproducing medium has grooves formed thereon along recording tracks, this optical recording and reproducing medium being recorded and/or reproduced with irradiation of light having a predetermined wavelength &lgr;. Since the grooves are composed of a first groove 2 and a second groove 3 shallower than the first groove 2 and the second groove 3 is disposed adjacent to both sides of the first groove 2, a recorded signal can be suppressed from crossing the tracks and a sufficiently large amplitude amount of a push-pull signal can be obtained. Thus, an optical recording and reproducing medium can produce a stable tracking signal and hence a recording density can be increased.
    Type: Application
    Filed: November 18, 2003
    Publication date: August 5, 2004
    Inventor: Sohmei Endoh
  • Publication number: 20040136295
    Abstract: During manufacturing of optical disks, mastering equipment inserts marks (“high frequency wobble marks” or“HFWMs”) into the wobble of the groove on optical disks to store data. The presence of a HFWM at a zero crossing of the wobble indicates an active bit and the absence of the HFWM indicates an inactive bit. The zero crossing is, for example, a negative zero crossing. A matched filter is used to detect the shape of the HFWMs. If a HFWM is detected during a wobble cycle, an active bit is saved in a register or a memory. If a HFWM is not detected during a wobble cycle, an inactive bit is saved in a register or a memory. The active and inactive bits may be coded bits that must be decoded to data bits. The data bits include information such as a synchronization mark, a sector identification data, and an error detection code.
    Type: Application
    Filed: December 3, 2003
    Publication date: July 15, 2004
    Applicant: STMicroelectronics S.A.
    Inventor: Philippe Graffouliere
  • Publication number: 20040130997
    Abstract: The invention relates to a process and a device for the mastering of an optical disk protected against copying and such an optical disk.
    Type: Application
    Filed: October 28, 2003
    Publication date: July 8, 2004
    Inventors: Jean-Louis Duhamel, Laurent Guenery, Gerard Godmer, Sylvin de Magnienville, Francois-Xavier Pirot
  • Publication number: 20040114493
    Abstract: The present invention provides an optical recording medium, in which levels of wobble signals extracted from a recording area formed snakily, a reproduction exclusive area and an impossible area are maintained constant. On DVD-RW, groove tracks are snakily formed on a groove section on which recording information is recorded, and pit strings where a plurality of phase pits wave are arranged on the impossible area and the reproduction exclusive area which prevent illegal copying. On the respective areas, pit depths (groove depths), duty of the pit strings and wobbling amplitudes are set according to predetermined conditions so that the output levels of the wobble signals extracted based on the wobbling amplitudes can be maintained constant on the respective areas. As a result, synchronous control can be made accurately at the time of recording and reproduction on/from the DVD-RW.
    Type: Application
    Filed: December 10, 2003
    Publication date: June 17, 2004
    Applicant: PIONEER CORPORATION
    Inventors: Atsushi Yamaguchi, Masahiro Kato, Eiji Muramatsu, Seiro Oshima, Takao Tagiri
  • Publication number: 20040042376
    Abstract: This invention provides an information recording method to record a digital information file onto an information recording medium. The digital information file comprises a plurality of digital data. The information recording medium comprises a plurality of predetermined recording units which are arranged sequentially on the information recording medium from a inner area to an outer area in order to record the plurality of digital data in the digital information file. The outer area of the information recording medium has a recording start unit, the information recording method starts recording from the recording start unit to sequentially record the plurality of digital data in the digital information file on the information recording medium from outer to inner.
    Type: Application
    Filed: July 2, 2003
    Publication date: March 4, 2004
    Applicant: MediaTek Inc.
    Inventor: Andrew C. Chang
  • Publication number: 20040001423
    Abstract: A high-density reproduction-only optical disc includes a high frequency data zone in which disc related information is recorded by high frequency wobbles, a user data area in which user data is recorded by pits, and a transition zone which is formed between the high frequency data zone and the user data. Accordingly, the reliability of reproducing data from the user data area is improved.
    Type: Application
    Filed: June 16, 2003
    Publication date: January 1, 2004
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Geun Lee, In-Sik Park, Myong-Do Ro, Du-Seop Yoon, Chang-Min Park
  • Publication number: 20040001418
    Abstract: An optical recording medium having two recording layer structures which includes a cover substrate, a grooved substrate, a first recording layer structure, an intermediate layer, a separation layer, and a second recording layer structure. In the optical recording medium, the two recording layer structures include a first recording layer structure, and a second recording layer structure between the substrates, the first recording layer structure includes, in this order, a first protective layer, a first recording layer, a second protective layer, a first inorganic layer, the second recording layer structure includes, in this order, a third protective layer, a second recording layer, a forth protective layer, a second inorganic layer, and a ratio of a thickness of the first recording layer structure and a thickness of the intermediate layer is 0.2 to 1.0.
    Type: Application
    Filed: March 21, 2003
    Publication date: January 1, 2004
    Inventors: Michiaki Shinotsuka, Takuro Sekiya
  • Publication number: 20030223344
    Abstract: A reproduction-only optical disc has a lead-in area, a user data area, and a lead-out area. Disc related information recorded on at least one of the lead-in area and the lead-out area is recorded by high frequency groove wobbles, and data of the user data area is recorded by pits. Since the high-density reproduction-only optical disc uses the same channels for reproduction signals as a high-density recordable optical disc, the two types of discs are consistent with each other and are compatible with the same disc drives.
    Type: Application
    Filed: May 28, 2003
    Publication date: December 4, 2003
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Kyung-Geun Lee, Myong-Do Ro, In-Sik Park, Du-Seop Yoon, Chang-Min Park
  • Publication number: 20030198171
    Abstract: A rewritable optical recording medium includes a segmented groove area in which the groove track is segmented along a rotating direction of the recording medium by groove non-forming portions to form a plurality of groove portions; and a continuous groove area in which a continuous groove is formed, the continuous groove having a groove width smaller than a groove width in the segmented groove area.
    Type: Application
    Filed: June 2, 2003
    Publication date: October 23, 2003
    Applicant: Pioneer Corporation
    Inventors: Yoshio Sasaki, Toshihiko Naruyama, Eiji Muramatsu, Masahiro Kato, Seiro Oshima, Takao Tagiri
  • Patent number: 6618349
    Abstract: In an optical recording medium of land/groove recording system, a sufficient tilt margin and a reduced cross talk are realized simultaneously with a sufficiently increased output. Provided is an optical recording medium having a light-transmitting substrate formed with grooves wherein the grooves and the region between adjacent grooves are used for the recording track, and a reading beam is irradiated through the light-transmitting substrate, wherein the relations: −12.6T+15.6≦x≦25T−3.8, and 0.55≦T≦0.68 are satisfied when the reading beam has a wavelength of &lgr;, the light-transmitting substrate has a refractive index at the wavelength &lgr; of n, the reading optical system has a numerical aperture of NA, recording track pitch is PT, the groove has a depth of &lgr;/(x·n), and T is PT/(&lgr;/NA).
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: September 9, 2003
    Assignee: TDK Corporation
    Inventors: Hiroyasu Inoue, Hajime Utsunomiya, Hiroshi Shingai, Tetsuro Mizushima, Tatsuya Kato
  • Patent number: 6618345
    Abstract: An optical recording medium includes recording tracks located adjacently to each other and is provided on and/or from which information is recorded and/or reproduced by irradiating with a beam a predetermined track of the recording tracks. The track pitch between the adjacent recording tracks is adjusted so that the track pitch is made substantially equal to a distance between an intensity center of a beam spot on a laser beam irradiated plane of the medium and a location of an initial minimum intensity. By irradiating with a beam the predetermined track, therefore, the beam intensity is located around the center of the recording track that is adjacent to the minimum portion. This location results in reducing a crosstalk amount from the adjacent recording track to a minimum, thereby suppressing the loss of the crosstalk characteristic to a minimum. This makes it possible to enhance the recording density in the alignment direction of the recording tracks if an A/W in the optical system is 1.
    Type: Grant
    Filed: September 24, 1996
    Date of Patent: September 9, 2003
    Assignee: Sony Corporation
    Inventors: Masaki Kagawa, Ayumi Konishi
  • Patent number: 6608800
    Abstract: An optical data-storage medium comprises a base structure adapted to supply a peripheral surface with a medium adhered thereon, forming a data surface responsive to a light beam for providing optical signals corresponding to a plurality of data, wherein the plurality of data are arranged in a three dimensional pattern, most preferably, a plurality of helixes suitable for application of parallel processing of information. For this purpose, an optical data-storage apparatus is designed from a single platform to accommodate the optical data-storage medium rotatable therein about an axial line at a steady and constant speed, and to allow a plurality of optical heads each capable of providing a light beam jointly movable in a direction generally parallel to the axial line so as to simultaneously process a plurality of data bits at a time, i.e., in parallel.
    Type: Grant
    Filed: April 17, 2002
    Date of Patent: August 19, 2003
    Inventor: Howard Hong-Dough Lee
  • Publication number: 20030147329
    Abstract: An optical medium for storing digital data thereon comprising a sequence of binary indicators on a first layer, a reflective layer disposed on the first layer, and a photosensitive layer disposed on the reflective layer, the reflective layer disposed between the first layer and the photosensitive layer, the photosensitive layer experiencing a perceivable loss of translucence upon exposure to a light source is provided. A method of reading data from an optical medium having a sequence of indicators having a binary value assigned thereto comprising radiating light onto a surface of the optical medium having the sequence of binary indicators disposed thereon through a photosensitive material disposed over the sequence and causing the translucence of the photosensitive material to decrease, detecting light reflected from the surface of the optical medium, and interpreting the reflected light as a binary value.
    Type: Application
    Filed: February 7, 2002
    Publication date: August 7, 2003
    Inventor: David Patrick Burks
  • Patent number: 6600711
    Abstract: An optical recording medium includes a land track and a groove track formed as a recording track to record and write information. A prepit sequence is formed on a middle position between the land track and the neighboring groove track as a head part of each sector on the recording track. The groove track is continuously formed on the prepit sequence section. The land track and the groove track are mutually formed as one spiral line or respectively formed as two parallel spiral lines on a surface of the optical recording medium.
    Type: Grant
    Filed: June 30, 1999
    Date of Patent: July 29, 2003
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Hiroshi Hasegawa
  • Patent number: 6600713
    Abstract: A hybrid optical recording medium is arranged to allow original information that is pre-recorded in a mass manufacturing process to be supplemented by additional information written to the disk after the original information has been recorded using a disk drive. The medium contains a first optical area for storing information which is pre-recorded according to a highly structured standard format and a second optical area in which supplemental information can be written, read back therefrom, erased and changed by a computer connected to the disk drive.
    Type: Grant
    Filed: June 26, 1996
    Date of Patent: July 29, 2003
    Assignee: Sun Microsystems, Inc.
    Inventor: Bruce Tognazzini
  • Publication number: 20030133393
    Abstract: Two standard marks are set on two adjacent respective recording tracks, aligned in a direction perpendicular to the said recording tracks in the unit area for recording and reading that includes said the two recording tracks. Recording on the recording track is performed by forming round-marks that have information shown by which side of the two tracks they exist in and by what distance they are from each of the said two standard marks in the set area including the said two recording tracks. Reading information on the recording track is performed by reading two recording tracks at the same time or alternately.
    Type: Application
    Filed: April 9, 2002
    Publication date: July 17, 2003
    Inventor: Katsuhiko Shinohara
  • Patent number: 6549495
    Abstract: A record carrier has substantially parallel tracks, which exhibit first variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations represent information recorded on the record carrier, which information is recoverable by means of a controllable type of data processing. A modulation pattern of the second variations represents a code for controlling the type of data processing. With respect to a code track that includes the modulation pattern, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track. Thereby crosstalk due to the second variations in decreased, and at least two tracks have the same modulation pattern. The playback device has a demodulator and a control unit for retrieving the code from at least two tracks.
    Type: Grant
    Filed: January 20, 2000
    Date of Patent: April 15, 2003
    Assignee: Koninklijke Philips Electronics N.V.
    Inventors: Johannes H. M. Spruit, Gijsbert Joseph Van Den Enden, Johan P. M. G. Linnartz, Johan C. Talstra
  • Publication number: 20030048735
    Abstract: An optical information recording medium including a ROM region in which pits are previously formed at a track pitch (P); and a RAM region including a groove which is to be exposed to laser light to form at least one of a pit and a mark therein and to record information to be reproduced, wherein the pits in the ROM region are wobbled in a radius direction of the recording medium, a wobbling inter-pit groove is formed along the wobbled pits, wherein the width (W) of the inter-pit groove is narrower than that of the groove in the RAM region. The ratio (W/P) of the width (W) of the inter-pit groove to the track pitch (P) is preferably from 0.2 to 0.4.
    Type: Application
    Filed: September 10, 2002
    Publication date: March 13, 2003
    Applicant: RICOH COMPANY, LTD.
    Inventors: Yasuo Sawada, Yasuhide Fujiwara
  • Publication number: 20030048734
    Abstract: An optical information recording medium, recording and reproducing method and device for same, and an optical pickup, which enables high-density recording and high-speed recording. Recording or reproduction is performed to or from the optical information recording medium having a track pitch Tp of 1.0 &mgr;m≦Tp≦1.2 &mgr;m, using laser light having a wavelength &lgr; of 770 nm≦&lgr;≦830 nm, and a spot diameter Sd of 1.1 &mgr;m≦Sd≦1.3 &mgr;m.
    Type: Application
    Filed: August 13, 2002
    Publication date: March 13, 2003
    Inventors: Yoshikazu Takagishi, Atsuo Shimizu, Ryuichi Sunagawa, Keiichi Ida, Mitsuo Sekiguchi, Isao Matsuda
  • Patent number: RE44659
    Abstract: A record carrier has substantially parallel tracks having first variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations represent information recorded on the record carrier, this information being recoverable by a controllable type of data processing. A modulation pattern of the second variations represents a code for controlling the type of data processing. In respect of a code track that includes the modulation pattern, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track. Thereby crosstalk due to the second variations is decreased, and at least two tracks have the same modulation pattern. The playback device has a demodulator (50) and a control unit (56) for retrieving the code from at least two tracks.
    Type: Grant
    Filed: May 30, 2008
    Date of Patent: December 24, 2013
    Assignee: Koninklijke Philips N.V.
    Inventors: Johannes H. M. Spruit, Gijsbert Joseph Van Den Enden, Johan P. M. G. Linnartz, Johan C. Talatra