WO2006001327A1 - 光ディスク装置および光ディスク半導体 - Google Patents
光ディスク装置および光ディスク半導体 Download PDFInfo
- Publication number
- WO2006001327A1 WO2006001327A1 PCT/JP2005/011515 JP2005011515W WO2006001327A1 WO 2006001327 A1 WO2006001327 A1 WO 2006001327A1 JP 2005011515 W JP2005011515 W JP 2005011515W WO 2006001327 A1 WO2006001327 A1 WO 2006001327A1
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- WIPO (PCT)
- Prior art keywords
- search
- track
- focus
- light beam
- spherical aberration
- Prior art date
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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
- G11B7/085—Disposition or mounting of heads or light sources relatively to record carriers with provision for moving the light beam into, or out of, its operative position or across tracks, otherwise than during the transducing operation, e.g. for adjustment or preliminary positioning or track change or selection
- G11B7/08505—Methods for track change, selection or preliminary positioning by moving the head
- G11B7/08523—Methods for track change, selection or preliminary positioning by moving the head with both tracking and focusing pull-in
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- 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
- G11B7/1392—Means for controlling the beam wavefront, e.g. for correction of aberration
- G11B7/13925—Means for controlling the beam wavefront, e.g. for correction of aberration active, e.g. controlled by electrical or mechanical means
-
- 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
- G11B2007/0003—Recording, reproducing or erasing systems characterised by the structure or type of the carrier
- G11B2007/0009—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage
- G11B2007/0013—Recording, reproducing or erasing systems characterised by the structure or type of the carrier for carriers having data stored in three dimensions, e.g. volume storage for carriers having multiple discrete layers
Definitions
- the present invention relates to an optical disc apparatus that performs a search operation when recording or reproducing information on a disc-shaped information carrier (hereinafter referred to as an optical disc) that can perform recording.
- a conventional optical disk device when reproducing a signal, it is relatively weak! A certain amount of light beam is irradiated onto the optical disk 1 (see FIG. 7) as an information carrier, and the optical disk 1 This is done by detecting weakly modulated reflected light. Signal recording is performed by modulating the intensity of the light beam in accordance with the signal to be recorded and writing information on the recording material film on the optical disc 1. In the reproduction-only optical disc 1, information from the pits is predominately spiraled. Is recorded.
- the optical disk 1 that can be recorded and reproduced is manufactured by forming a material film that can be optically recorded and reproduced on the surface of a base material having a track having a concave and convex structure by a method such as vapor deposition. .
- the normal direction of the surface of the optical disc 1 hereinafter referred to as the focus direction
- Focus control to be controlled and tracking control to control in the radial direction of the optical disc 1 (hereinafter referred to as tracking direction) so that the light beam is always located on a predetermined track.
- Figure 7 shows the block configuration of a conventional optical disk device.
- Figure 8 shows an example of a flowchart showing the entire search.
- FIG. 9 shows an example of a flowchart of the search movement operation executed by the search procedure indicator 43.
- the focus error detection means is an FE generator 20.
- the focus control means is an Fc filter 21 and a selector 22.
- the track error detection means is a TE generator 30.
- the tracking control means is a Tk filter 31 and a selector 32.
- the spherical aberration search means is a spherical aberration setting unit 52. Focus search means calculates Fc movement amount 47 and Fc search drive generator 49.
- the optical head 10 is equipped with a semiconductor laser 11, a condenser lens 13, a beam splitter 12, an Fc effector 14, a Tk effector 15, a spherical aberration generator 16, and a photodetector 17.
- the light beam generated from the semiconductor laser 11 passes through the beam splitter 12, changes the spherical aberration amount by the spherical aberration generator 16, and is converged on the disc-shaped optical disk 1 by the condenser lens 13.
- the reflected light beam passes through the condenser lens 13 and the spherical aberration generator 16 again, is reflected by the beam splitter 12, and is applied to the photodetector 17.
- the condenser lens 13 is supported by an elastic body (not shown), and moves in the focus direction by electromagnetic force when a current is passed through the Fc actuator 14.
- a current is passed through the Tk actuator 15, it moves in the tracking direction due to electromagnetic force.
- the photodetector 17 generates a signal corresponding to the detected light amount.
- the photodetector 17 sends the generated signal to the FE generator 20, the TE generator 30 and the address detector 44.
- the FE generator 20 uses the light amount signal of the photodetector 17 to indicate an error signal indicating the convergence state of the light beam on the information surface of the optical disc 1, that is, the position of the focal point of the optical beam with respect to the information surface of the optical disc 1.
- An error signal corresponding to the deviation (hereinafter referred to as the FE signal) is calculated and sent to the Fc filter 21.
- the Fc filter 21 generates a drive for performing focus control according to the signal from the FE generator 20 and sends it to the Fc actuator 14 via the selector 22.
- the TE generator 30 calculates a TE signal indicating the positional relationship between the optical beam on the optical disc 1 and the track using the light amount signal from the photodetector 17 and sends it to the Tk filter 31.
- the Tk filter 31 generates a drive for performing tracking control according to the signal from the TE generator 30, and sends the drive to the Tk actuator 15 via the selector 32.
- the search commander 40 sends a search operation start command to the search procedure indicator 43 so that the focal point of the light beam is located at the target address, and also sends the target address to the moving layer calculator 46 and the Fc movement amount calculator. Send to 47.
- the search procedure indicator 43 sends an operation signal to the selector 22, the selector 32, the Fc search drive generator 49, and the spherical aberration setting device 52 in accordance with a predetermined procedure.
- the address detector 44 uses the signal from the photodetector 17 to position the focal point of the light beam.
- the current address of the optical disc 1 to be detected is detected and sent to the Fc movement amount calculator 47.
- the Fc movement amount calculator 47 calculates the amount of movement in the focus direction for the focal point of the light beam to reach the target address.
- the Fc search drive generator 49 generates a drive waveform corresponding to the movement amount from the Fc movement amount calculator 47 according to the operation signal from the search procedure indicator 43, and sends it to the Fc actuator 14 via the selector 22. .
- the moving layer computing unit 46 computes the information surface position of the optical disc 1 where the target address from the search commanding unit 40 exists, and sends it to the spherical aberration computing unit 51.
- the spherical aberration calculator 51 sends the spherical aberration setting amount stored in advance according to the information surface position from the moving layer calculator 46 to the spherical aberration setting unit 52.
- the spherical aberration setting unit 52 drives the spherical aberration generator 16 so that the spherical aberration amount at the focal point of the light beam becomes the spherical aberration amount from the spherical aberration calculator 51 according to the operation signal from the search procedure indicator 43. To do.
- Step S101 Determine whether the focus control and tracking control are normal. For example, when the state where the signal level from the FE generator 20 is equal to or higher than a predetermined level continues for a predetermined time or more, it is determined that the focus control is in an abnormal state.
- Step S102 With focus control, when the tracking control is in an abnormal state, the control bow is set again to return to the normal state.
- Step S103 When the focus control and tracking control are in a normal state, the address detector 44 acquires the current address.
- Step S104 It is determined whether or not the target address and the current address acquired by the address detector 44 are within a predetermined distance.
- Step S105 When the target address and the current address obtained by the address detector 44 are not within the predetermined distance, the Fc movement amount calculator 47 determines whether the target address from the search commander 40 and the current address from the address detector 44 are Depending on the address, the number of moving surfaces in the focus direction necessary for the focal point of the light beam to reach the target address is calculated.
- Step S106 A spherical aberration amount corresponding to the information surface to which the target address belongs is obtained.
- the moving layer computing unit 46 specifies the information surface to which the target address belongs according to the target address from the search command unit 40. Further, the spherical aberration calculator 51 calculates a spherical aberration amount to be set according to the information surface information from the moving layer calculator 46.
- Step S107 The actual search movement operation is executed in accordance with a command from the search procedure indicator 43. Details will be described step by step with reference to FIG.
- Step S201 The tracking control is deactivated. For example, the operation of the selector 32 prevents the signal from the Tk filter 31 from being sent to the Tk actuator 15.
- the spherical aberration setting unit 52 drives the spherical aberration generator 16 in accordance with a signal from the spherical aberration calculator 51.
- Step S203 Move the light beam in the focus direction.
- the selector 22 is connected to send the signal from the Fc search drive generator 49 to the Fc featurer 14.
- the Fc search drive generator 49 sends a drive signal for moving the condenser lens 13 up and down in accordance with the movement amount from the Fc movement amount calculator 47 to the Fc function generator 14 via the selector 22.
- the selector 22 is connected so as to send a signal from the Fc filter 21 to the Fc actuator 14 (see, for example, Patent Document 1).
- Step S204 The tracking control is set to the operating state. For example, the signal from the Tk filter 31 is sent to the Tk actuator 15 by the operation of the selector 32.
- Patent Document 1 Japanese Patent Laid-Open No. 2003-22545
- the FE signal from the FE generator 20 When the spherical aberration amount error at the focal point of the light beam becomes large, the FE signal from the FE generator 20, the TE signal from the TE generator 30, the recording / reproducing signal, etc. deteriorate, and the recording / reproducing operation cannot be performed correctly.
- Figure 10 shows the optimum amount of spherical aberration given to the light beam according to the information surface and the radial position where the focal point of the light beam is located.
- the horizontal axis indicates the radius position of the focal point of the light beam with respect to the optical disc 1
- the vertical axis indicates the amount of spherical aberration.
- the optimum value of the spherical aberration amount depends on the distance between the information surface of the target optical disc 1 and the surface of the optical disc 1.
- Has multiple information aspects In the optical disc 1 that changes the information surface for recording and reproduction of the optical disc 1, it is necessary to change the amount of spherical aberration of the light beam according to the distance between the information surfaces.
- the spherical aberration generator 16 may be configured to change the distance between a pair of lenses by a stepping motor.
- the position movement by driving the motor such as a stepping motor, moves at a low speed at the start and end of movement, and is required to move at a high speed during the movement. Therefore, a drive signal is generated based on a preset speed profile. . For this reason, even if the same distance is moved, if the movement is performed in multiple times, the required time becomes longer. Therefore, when moving in the track direction, there is a problem that the search time becomes long if only the spherical aberration is changed as in the case of moving in the focus direction.
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an optical disc apparatus that performs a quick search operation.
- optical disc device is a mirror image of the optical disc device according to the first invention.
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focal point of the light beam in parallel with the surface of the information carrier in accordance with a signal from the track error detection means and controlling the scanning of the information carrier track;
- Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target information surface to be given to the light beam and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for operating in the order of spherical aberration search means, focus search means, track search means during search;
- the derivation of the spherical aberration amount performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track.
- the calculation may be performed using a target information surface and a target track.
- An optical disc device is the first invention
- the search procedure instructing means is characterized in that the tracking control means is not in an operating state between the operations of the focus search means and the track search means.
- the tracking control is not set to the operation state, for example, the tracking control is performed between the operation of the focus search unit and the track search unit, which may be to maintain the non-operational state of the tracking control. Means no.
- An optical disc device is the first invention
- the search procedure instruction means is characterized in that if the focus control is abnormal during the operation of the focus search means and the track search means, the track search means is operated after the focus control is deactivated. To do.
- the abnormality in the focus control may be detected by the search procedure instruction means, or may be detected by the focus abnormality detection means for detecting that the focus control is out of the normal control state. Also, the abnormality in focus control is detected based on, for example, a signal (more specifically, the amount of reflected light from the information carrier) acquired from the focus error detection means.
- a signal more specifically, the amount of reflected light from the information carrier
- “between the operations of the focus search means and the track search means” is, for example, For example, it means after the operation of the focus search means and before the operation of the track search means.
- the search procedure instruction means operates the track search means only when the number of track searches is a predetermined number or more.
- An optical disc device according to a fifth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track, a search procedure instruction means for operating in the order of the track search means, the spherical aberration search means, and the focus search means during the search
- the spherical aberration amount derivation performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track.
- the calculation may be performed using a target information surface and a target track.
- An optical disc device is the first or fifth invention.
- the search procedure instruction means indicates that the focus control is abnormal during the operation of the track search means. If there is, the focus control means is inactivated while the operation of the track search means is continued.
- the abnormality in the focus control may be detected by the search procedure instruction means, or may be detected by the focus abnormality detection means for detecting that the focus control is out of the normal control state. Also, the abnormality in focus control is detected based on, for example, a signal (more specifically, the amount of reflected light from the information carrier) acquired from the focus error detection means.
- An optical disc device is the sixth invention.
- the search procedure instruction means is characterized in that the operation of the track search means is continued only when the number of track searches is a predetermined number or more.
- An optical disc device is the third or sixth invention.
- Focus bow I-spherical aberration setting method to set the spherical aberration amount according to the information surface on which
- the retrieval procedure instruction means operates the focus control means on the information surface corresponding to the drawn spherical aberration setting means.
- An optical disk device is the third or sixth invention.
- the search procedure instructing means operates the focus control means on the information surface corresponding to the spherical aberration search means.
- An optical disc apparatus according to a tenth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focal point of the light beam in parallel with the surface of the information carrier in accordance with a signal from the track error detection means and controlling the scanning of the information carrier track;
- Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target information surface to be given to the light beam and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for simultaneously operating the track search means and the spherical aberration search means during the search;
- the derivation of the spherical aberration amount performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track. Alternatively, the calculation may be performed using a target information surface and a target track. Further, “the track search means and the spherical aberration search means are simultaneously operated” means that both operations are performed in duplicate at the same time.
- An optical disc device is the tenth invention
- the search procedure instruction means ends the operations of the track search means and the spherical aberration search means before the start of focus control on the target information surface.
- the optical disk apparatus is the tenth or eleventh invention, wherein the search procedure instructing means starts each operation so that the operation of the track search means and the spherical aberration search means is completed simultaneously. It is characterized by changing the timing.
- the optical disk apparatus is the tenth or eleventh invention, wherein the search procedure instruction means is configured so that the operation start and operation end of the track search means and the spherical aberration search means are simultaneously performed. The operation speed is changed.
- the operation speed is a search movement speed of the track search means or the spherical aberration search means.
- An optical disk device is the twelfth or thirteenth invention, characterized in that the track search means waits for a predetermined time after the focal point of the light beam is moved. To do.
- An optical disc apparatus according to a fifteenth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure indicating means for simultaneously operating the focus search means and the spherical aberration search means during the search;
- the derivation of the spherical aberration amount performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track. Alternatively, the calculation may be performed using a target information surface and a target track. Further, “the focus search means and the spherical aberration search means are operated simultaneously” means that both operations are performed at the same time.
- An optical disc apparatus is the fifteenth invention
- the search procedure instruction means ends the operations of the force search means and the spherical aberration search means before the start of tracking control in the target track.
- the optical disc device according to a seventeenth invention is the fifteenth or sixteenth invention, wherein the search procedure instructing means starts each operation so that the operation ends of the focus search means and the spherical aberration search means are simultaneous. It is characterized by changing the timing.
- An optical disc apparatus is the seventeenth invention
- the focus search means is characterized in that it waits for a predetermined time after the focal point of the light beam is moved.
- An optical disk semiconductor according to a nineteenth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for operating in the order of spherical aberration search means, focus search means, track search means during search;
- An optical disc semiconductor comprising:
- the derivation of the spherical aberration amount performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track. Alternatively, the calculation may be performed using a target information surface and a target track.
- An optical disk semiconductor according to a twentieth invention is the nineteenth invention.
- the search procedure instructing means is characterized in that the tracking control means is not in an operating state between the operations of the focus search means and the track search means.
- the tracking control is not set to the operation state, for example, the tracking control is performed between the operation of the focus search unit and the track search unit, which may be to maintain the non-operational state of the tracking control. Means no.
- An optical disk semiconductor according to a twenty-first invention is the nineteenth invention
- the search procedure instruction means is characterized in that if the focus control is abnormal during the operation of the focus search means and the track search means, the track search means is operated after the focus control is deactivated. To do.
- the abnormality in the focus control may be detected by the search procedure instruction means, or may be detected by the focus abnormality detection means for detecting that the focus control is out of the normal control state. Also, the abnormality in focus control is detected based on, for example, a signal (more specifically, the amount of reflected light from the information carrier) acquired from the focus error detection means. Further, “between operations of the focus search means and the track search means” means, for example, after the operation of the focus search means and before the operation of the track search means.
- An optical disk semiconductor according to a twenty-second invention is the twenty-first invention
- the search procedure instruction means operates the track search means only when the number of track searches is a predetermined number or more.
- An optical disk semiconductor according to a twenty-third invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focal point of the light beam in parallel with the surface of the information carrier in accordance with a signal from the track error detection means and controlling the scanning of the information carrier track;
- Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target information surface to be given to the light beam and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means that operates in the order of the track search means, the spherical aberration search means, and the focus search means during the search;
- An optical disc semiconductor comprising:
- the derivation of the spherical aberration amount performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track.
- the calculation may be performed using a target information surface and a target track.
- the optical disk semiconductor according to the twenty-fourth invention is the nineteenth or twenty-third invention, wherein the search procedure instruction means continues the operation of the track search means if the focus control is abnormally controlled during the operation of the track search means. However, it is characterized in that the focus control means is brought into a non-operating state.
- the abnormality in the focus control may be detected by the search procedure instruction means, or may be detected by the focus abnormality detection means for detecting that the focus control is out of the normal control state. Also, the abnormality in focus control is detected based on, for example, a signal (more specifically, the amount of reflected light from the information carrier) acquired from the focus error detection means.
- An optical disk semiconductor according to a twenty-fifth aspect of the invention is the twenty-fourth aspect of the invention.
- the search procedure instruction means is characterized in that the operation of the track search means is continued only when the number of track searches is a predetermined number or more.
- An optical disk semiconductor is the twenty-first or twenty-fourth aspect of the invention, comprising a spherical aberration setting means for setting a spherical aberration amount corresponding to an information surface on which the focus bow is set, Further comprising
- the retrieval procedure instruction means operates the focus control means on the information surface corresponding to the drawn spherical aberration setting means.
- An optical disk semiconductor according to a twenty-seventh aspect is the twenty-first or twenty-fourth invention, characterized in that the search procedure instruction means operates the focus control means on the information surface corresponding to the spherical aberration search means. To do.
- An optical disk semiconductor according to the twenty-eighth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for simultaneously operating the track search means and the spherical aberration search means during the search;
- An optical disc semiconductor comprising:
- the derivation of the spherical aberration amount performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track. Alternatively, the calculation may be performed using a target information surface and a target track.
- the rack search means and the spherical aberration search means are operated at the same time means that both operations are performed at the same time.
- An optical disk semiconductor according to a twenty-ninth invention is the twenty-eighth invention
- the search procedure instruction means ends the operations of the track search means and the spherical aberration search means before the start of focus control on the target information surface.
- the optical disk semiconductor according to the thirtieth invention is the twenty-eighth or the twenty-ninth invention, wherein the search procedure instruction means starts each operation so that the operation of the track search means and the spherical aberration search means ends simultaneously. It is characterized by changing the timing.
- the optical disk semiconductor according to the thirty-first invention is the twenty-eighth or twenty-ninth invention, wherein the search procedure instruction means is configured so that the operation start and operation end of the track search means and the spherical aberration search means are simultaneously performed. The operation speed is changed.
- the operation speed is a search movement speed of the track search means or the spherical aberration search means.
- An optical disk semiconductor according to a thirty-second invention is the thirty-first or thirty-first invention, wherein the track search means waits for a predetermined time after the focal point of the light beam is moved.
- An optical disk semiconductor according to a thirty-third invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- the amount of spherical aberration given to the light beam is changed according to the signal from the spherical aberration deriving means.
- Spherical aberration retrieval means
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure indicating means for simultaneously operating the focus search means and the spherical aberration search means during the search;
- An optical disc semiconductor comprising:
- the spherical aberration amount derivation performed by the spherical aberration deriving means may be performed by reading values stored in a table or the like in advance for the target information surface and the target track.
- the calculation may be performed using a target information surface and a target track.
- “activate focus search means and spherical aberration search means simultaneously” means that the same time is used.
- V means that both operations are performed in duplicate.
- An optical disk semiconductor according to a thirty-fourth invention is the thirty-third invention
- the search procedure instruction means ends the operations of the force search means and the spherical aberration search means before the start of tracking control in the target track.
- the optical disk semiconductor according to the thirty-fifth aspect of the present invention is the thirty-third or thirty-fourth invention, wherein the search procedure instructing means starts each operation so that the operation ends of the focus search means and the spherical aberration search means are simultaneous. It is characterized by changing the timing.
- An optical disk semiconductor according to a thirty-sixth invention is the thirty-fifth invention
- the focus search means is characterized in that it waits for a predetermined time after the focal point of the light beam is moved.
- optical disc device is a mirror image of the optical disc device according to the first invention.
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for operating in the order of spherical aberration search means, focus search means, track search means during search;
- the spherical aberration deriving means derives the spherical convergence after the search movement from the target information surface and the target track. Since the optical disk apparatus of the present invention performs a search operation using the derived spherical aberration amount, a search operation that does not require changing the setting of the spherical aberration amount every time the focus search unit and the track search unit operate. Can be done quickly.
- An optical disc device is the first invention
- the search procedure instructing means is characterized in that the tracking control means is not in an operating state between the operations of the focus search means and the track search means.
- the search time can be shortened.
- An optical disc device is the first invention
- the search procedure instruction means is characterized in that if the focus control is abnormal during the operation of the focus search means and the track search means, the track search means is operated after the focus control is deactivated. To do.
- the force is also recovered from the control error of the focus control by moving the light beam to the target position. I do. For this reason, it is not necessary to repeatedly perform the focus control as in the conventional case, and the recovery time can be shortened.
- An optical disc device is the third invention
- the search procedure instruction means operates the track search means only when the number of track searches is a predetermined number or more.
- the sum of the moving time in the radial direction and the return time can be shortened.
- An optical disc device according to a fifth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means that operates in the order of the track search means, the spherical aberration search means, and the focus search means during the search;
- the spherical aberration deriving means derives the spherical convergence after the search movement from the target information surface and the target track.
- the optical disk apparatus of the present invention uses the derived spherical aberration amount to detect the amount of spherical aberration. Since the search operation is performed, it is possible to quickly perform the search operation without having to change the setting of the spherical aberration amount every time the focus search unit and the track search unit operate.
- An optical disc device is the first or fifth invention.
- the search procedure instruction means is characterized in that if the focus control is abnormal during the operation of the track search means, the focus control means is inactivated while continuing the operation of the track search means.
- the optical disk apparatus of the present invention since the spherical aberration amount at the target position is set, the light beam is moved to the target position, and the force is also recovered from the control error of the focus control. For this reason, it is not necessary to repeatedly perform the focus control as in the conventional case, and the recovery time can be shortened.
- An optical disc device is the sixth invention.
- the search procedure instruction means is characterized in that the operation of the track search means is continued only when the number of track searches is a predetermined number or more.
- the sum of the moving time in the radial direction and the return time can be shortened.
- An optical disc device is the third or sixth invention.
- Focus bow I-spherical aberration setting method to set the spherical aberration amount according to the information surface on which
- the retrieval procedure instruction means operates the focus control means on the information surface corresponding to the drawn spherical aberration setting means.
- the amount of spherical aberration corresponding to the information surface on which the focus is pulled in is set, and the focus is pulled in on the information surface, so that the focus pull-in at the time of return from the control error of the focus control is stable. Hesitate. As a result, the expected value of the return time from the control error of the focus control can be shortened.
- An optical disk device is the third or sixth invention.
- the search procedure instructing means operates the focus control means on the information surface corresponding to the spherical aberration search means.
- the layer moving operation is not performed when the control abnormal force of the focus control is restored, so that the restoration time can be shortened.
- An optical disc apparatus according to a tenth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for simultaneously operating the track search means and the spherical aberration search means during the search;
- the optical disk apparatus of the present invention simultaneously operates the track search means and the spherical aberration search means at the time of search, it is possible to quickly perform a search operation that requires changing the spherical aberration correction amount.
- An optical disc device is the tenth invention
- the search procedure instruction means ends the operations of the track search means and the spherical aberration search means before the start of focus control on the target information surface.
- the optical disc apparatus of the present invention ensures the stability of focus control at the start of focus control. Can be kept.
- the optical disk apparatus is the tenth or eleventh invention, wherein the search procedure instructing means starts each operation so that the operation of the track search means and the spherical aberration search means is completed simultaneously. It is characterized by changing the timing.
- the optical disk apparatus of the present invention can optimally shorten the sum of the movement time in the radial direction and the movement time of the spherical aberration.
- the optical disk apparatus is the tenth or eleventh invention, wherein the search procedure instruction means is configured so that the operation start and operation end of the track search means and the spherical aberration search means are simultaneously performed. The operation speed is changed.
- the optical disc apparatus according to the present invention has a stable tracking error signal during movement in the radial direction.
- An optical disk device is the twelfth or thirteenth invention, characterized in that the track search means waits for a predetermined time after the focal point of the light beam is moved.
- the optical disk apparatus of the present invention can reduce the search time by utilizing the settling time after the radius movement.
- An optical disc apparatus according to a fifteenth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- the amount of spherical aberration given to the light beam is changed according to the signal from the spherical aberration deriving means.
- Spherical aberration retrieval means
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure indicating means for simultaneously operating the focus search means and the spherical aberration search means during the search;
- the optical disc apparatus of the present invention operates the focus search means and the spherical aberration search means simultaneously during the search, it is possible to quickly perform a search operation that requires changing the spherical aberration correction amount.
- An optical disc apparatus is the fifteenth invention
- the search procedure instruction means ends the operations of the force search means and the spherical aberration search means before the start of tracking control in the target track.
- the optical disc apparatus of the present invention can maintain the stability of tracking control at the start of tracking control.
- the optical disk device is the fifteenth or sixteenth invention, wherein the search procedure instructing means starts each operation so that the operation ends of the focus search means and the spherical aberration search means are simultaneous. It is characterized by changing the timing.
- the optical disk apparatus of the present invention can optimally shorten the sum of the movement time in the layer direction and the movement time of the spherical aberration.
- An optical disc apparatus is the seventeenth invention
- the focus search means is characterized in that it waits for a predetermined time after the focal point of the light beam is moved.
- the optical disk apparatus of the present invention can shorten the search time by utilizing the settling time after moving the layer.
- An optical disk semiconductor according to a nineteenth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for operating in the order of spherical aberration search means, focus search means, track search means during search;
- An optical disc semiconductor comprising:
- the spherical aberration deriving means derives the spherical convergence after the search movement from the target information surface and the target track. Since the optical disk semiconductor of the present invention performs a search operation using the derived spherical aberration amount, a search operation that does not require the setting of the spherical aberration amount to be changed each time the focus search unit and the track search unit operate is performed. Can be done quickly.
- An optical disk semiconductor according to a twentieth invention is the nineteenth invention,
- the search procedure instructing means is characterized in that the tracking control means is not in an operating state between the operations of the focus search means and the track search means.
- the search time can be shortened.
- An optical disk semiconductor according to a twenty-first invention is the nineteenth invention
- the search procedure instruction means sets the track detection after the focus control is inactivated. The search means is operated.
- the optical disk semiconductor of the present invention since the spherical aberration amount at the target position is set, the light beam is moved to the target position, and the control abnormal force of force focus control is restored. For this reason, it is possible to shorten the return time without having to repeatedly perform the focus control as in the conventional case.
- An optical disk semiconductor according to a twenty-second invention is the twenty-first invention
- the search procedure instruction means operates the track search means only when the number of track searches is a predetermined number or more.
- the sum of the moving time in the radial direction and the return time can be shortened.
- An optical disk semiconductor according to a twenty-third invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means that operates in the order of the track search means, the spherical aberration search means, and the focus search means during the search;
- An optical disc semiconductor comprising:
- the spherical aberration deriving means derives the spherical convergence after the search movement from the target information surface and the target track. Since the optical disk semiconductor of the present invention performs a search operation using the derived spherical aberration amount, the search operation without having to change the spherical aberration amount setting every time the focus search unit and the track search unit operate. Can be done quickly.
- the optical disk semiconductor according to the twenty-fourth invention is the nineteenth or twenty-third invention, wherein the search procedure instruction means continues the operation of the track search means if the focus control is abnormally controlled during the operation of the track search means. However, it is characterized in that the focus control means is brought into a non-operating state.
- the optical disk semiconductor of the present invention since the spherical aberration amount at the target position is set, the light beam is moved to the target position, and the control abnormal force of force focus control is restored. For this reason, it is possible to shorten the return time without having to repeatedly perform the focus control as in the conventional case.
- An optical disk semiconductor according to a twenty-fifth aspect of the invention is the twenty-fourth aspect of the invention.
- the search procedure instruction means is characterized in that the operation of the track search means is continued only when the number of track searches is a predetermined number or more.
- the sum of the moving time in the radial direction and the return time can be shortened.
- An optical disk semiconductor is the twenty-first or twenty-fourth aspect of the invention, comprising a spherical aberration setting means for setting a spherical aberration amount corresponding to an information surface on which the focus bow is set,
- the retrieval procedure instruction means operates the focus control means on the information surface corresponding to the drawn spherical aberration setting means.
- the amount of spherical aberration corresponding to the information surface on which the focus is pulled in is set and the focus is pulled in on the information surface, so that the focus pull-in at the time of return from the control error of the focus control is stable. I'll do it. As a result, it is possible to shorten the expected value of the return time from the control abnormality of the focus control.
- An optical disk semiconductor according to a twenty-seventh aspect is the twenty-first or twenty-fourth invention, characterized in that the search procedure instruction means operates the focus control means on the information surface corresponding to the spherical aberration search means. To do.
- the restoration time can be shortened.
- An optical disk semiconductor according to the twenty-eighth invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focus of the light beam in parallel with the surface of the information carrier according to the signal from the track error detection means and controlling the scanning of the track of the information carrier; and the target information surface to be given to the light beam Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target track and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure instruction means for simultaneously operating the track search means and the spherical aberration search means during the search;
- An optical disc semiconductor comprising:
- the optical disk semiconductor of the present invention simultaneously operates the track search means and the spherical aberration search means during the search, it is possible to quickly perform a search operation that requires changing the spherical aberration correction amount.
- An optical disk semiconductor according to a twenty-ninth invention is the twenty-eighth invention.
- the search procedure instruction means ends the operations of the track search means and the spherical aberration search means before the start of focus control on the target information surface.
- the optical disk semiconductor of the present invention can maintain the stability of focus control at the start of focus control.
- the optical disk semiconductor according to the thirtieth invention is the twenty-eighth or the twenty-ninth invention, wherein the search procedure instruction means starts each operation so that the operation of the track search means and the spherical aberration search means ends simultaneously. It is characterized by changing the timing.
- the optical disk semiconductor of the present invention can optimally shorten the sum of the movement time in the radial direction and the movement time of the spherical aberration.
- the optical disk semiconductor according to the thirty-first invention is the twenty-eighth or twenty-ninth invention, wherein the search procedure instruction means is configured so that the operation start and operation end of the track search means and the spherical aberration search means are simultaneously performed. The operation speed is changed.
- the optical disk semiconductor of the present invention can obtain a stable tracking error signal (TE signal) even during movement in the radial direction.
- An optical disk semiconductor according to a thirty-second invention is the thirty-first or thirty-first invention, wherein the track search means waits for a predetermined time after the focal point of the light beam is moved.
- the optical disk semiconductor of the present invention can shorten the search time by utilizing the settling time after the radius movement.
- An optical disk semiconductor according to a thirty-third invention is
- a focus error detecting means for detecting a signal corresponding to a positional deviation of the focal point of the light beam with respect to the information surface or surface of the information carrier;
- a focus control means for changing a convergence state of the light beam so that the focus of the light beam follows the information surface of the information carrier according to the signal of the focus error detection means;
- a track error detecting means for detecting a signal corresponding to a positional deviation between the light beam and the track on the information carrier
- Tracking control means for driving the focal point of the light beam in parallel with the surface of the information carrier in accordance with a signal from the track error detection means and controlling the scanning of the information carrier track;
- Spherical aberration deriving means for deriving the spherical convergence after the search movement from the target information surface to be given to the light beam and the target track;
- a spherical aberration search means for changing the amount of spherical aberration given to the light beam in accordance with a signal from the spherical aberration deriving means;
- a focus search means for moving the focal point of the light beam from the current information plane to the target information plane
- a track search means for moving the focal point of the light beam from the current track to a target track; a search procedure indicating means for simultaneously operating the focus search means and the spherical aberration search means during the search;
- An optical disc semiconductor comprising:
- the optical disk semiconductor of the present invention operates the focus search means and the spherical aberration search means simultaneously during the search, it is possible to quickly perform a search operation that requires changing the spherical aberration correction amount.
- An optical disk semiconductor according to a thirty-fourth invention is the thirty-third invention
- the search procedure instruction means ends the operations of the force search means and the spherical aberration search means before the start of tracking control in the target track.
- the optical disk semiconductor of the present invention can ensure the stability of tracking control at the start of tracking control.
- the optical disk semiconductor according to the thirty-fifth aspect of the present invention is the thirty-third or thirty-fourth invention, wherein the search procedure instructing means starts each operation so that the operation ends of the focus search means and the spherical aberration search means are simultaneous. It is characterized by changing the timing.
- the optical disk semiconductor of the present invention can optimally shorten the sum of the movement time in the layer direction and the movement time of the spherical aberration.
- An optical disk semiconductor according to a thirty-sixth invention is the thirty-fifth invention
- the focus search means is characterized in that it waits for a predetermined time after the focal point of the light beam is moved.
- the optical disk semiconductor of the present invention can reduce the search time by utilizing the settling time after moving the layer.
- FIG. 1 is a diagram showing a block configuration according to the first embodiment.
- FIG. 2 shows an example of a flowchart executed by the search procedure indicator in the first embodiment.
- FIG. 3 shows an example of a flowchart executed by the search procedure indicator in the first embodiment.
- FIG. 4 shows a block configuration in the second embodiment.
- FIG. 5 shows an example of a flowchart executed by the search procedure indicator in the second embodiment.
- FIG. 6A is a diagram showing an example of the radial position of the light beam with respect to the optical disc in the second embodiment
- FIG. 6B is a diagram showing an example of the output of the signal with the spherical aberration setting power in the second embodiment.
- FIG. 8 is a diagram showing an example of a flowchart showing the entire search in the background art
- FIG. 9 An example of a flowchart executed by a search procedure indicator in the background art.
- FIG. 10 An example of an optimal spherical aberration setting for each information surface and radius position in the background technology.
- FIG. 11 (a) A diagram showing an example of a time chart of a search operation in the background art, (b) A diagram showing an example of a time chart of a search operation in the first embodiment.
- FIG. 12 (a) A diagram showing an example of a time chart of a search operation in the background art, (b) A diagram showing an example of a time chart of a search operation in the second embodiment.
- FIG. 1 shows a block configuration of the optical disc apparatus 100.
- Figure 2 shows An example of a flowchart of the search movement operation executed by the search procedure indicator 41 is shown.
- FIG. 3 shows another example of a flowchart of the search movement operation executed by the search procedure indicator 41.
- Fig. 11 (a) shows an example of a time chart of the search operation in the background art.
- FIG. 11 (b) shows an example of a time chart of the search operation in the first embodiment.
- Figure 11 shows the time required to process each block's length force.
- the spherical aberration deriving means is a moving position calculator 45 and a spherical aberration calculator 51.
- the track search means is a Tk movement amount calculator 48 and a Tk search drive generator 50.
- the search procedure instruction means is a search procedure indicator 41.
- the focus abnormality detection means is a control abnormality detector 60.
- the drawing spherical aberration setting means is a spherical aberration reference device 61.
- the search commander 40 sends a search operation start command to the search procedure indicator 41 so that the focal point of the light beam is positioned at the target address, and also sends the target address to the movement position calculator 45, the Fc movement amount calculator 47, And Tk movement amount calculator 48.
- the search procedure indicator 41 sends the operation signal to the selector 22, the selector 32, the Fc search drive generator 49, the Tk search drive generator 50, and the spherical aberration setting device 52 in accordance with a predetermined procedure described later using a flowchart or the like. send.
- the Tk movement amount calculator 48 calculates the movement amount in the track direction for the focal point of the light beam to reach the target address. The calculation result is sent to the Tk search drive generator 50 and the search procedure indicator 41.
- the Tk search drive generator 50 generates a drive waveform corresponding to the movement amount from the Tk movement amount calculator 48 in response to the operation signal from the search procedure indicator 41, and sends it to the Tk character 15 via the selector 32. .
- the movement position calculator 45 calculates the information surface position and the radial position of the optical disc 1 where the target address from the search command unit 40 exists, and sends it to the spherical aberration calculator 51.
- the spherical aberration calculator 51 sends the spherical aberration setting amount stored in advance according to the information surface position and the radial position from the movement position calculator 45 to the spherical aberration setter 52.
- the spherical aberration reference unit 61 holds in advance the amount of spherical aberration when starting focus control, and sends the value to the spherical aberration setting unit 52.
- the spherical aberration setting unit 52 determines the focus of the light beam according to the operation signal from the search procedure indicator 41.
- the spherical aberration generator 16 is driven so that the spherical aberration amount at the point becomes the spherical aberration amount from the spherical aberration calculator 51 or the spherical aberration amount from the spherical aberration reference unit 61.
- the control abnormality detector 60 detects that an abnormality has occurred in the focus control based on the signal from the FE generator 20, and sends the detection result to the search procedure indicator 41.
- Step S301 Disable tracking control.
- the search procedure indicator 41 operates the selector 32 so that the signal from the Tk filter 31 is not sent to the Tk featurer 15.
- Step S302 The amount of spherical aberration is changed according to the target address.
- the spherical aberration setting unit 52 drives the spherical aberration generator 16 so as to set the amount of spherical aberration according to the signal from the spherical aberration calculator 51.
- Step S303 The focus of the light beam is moved in the focus direction.
- the search procedure indicator 41 is connected so as to operate the selector 22 and send the signal from the Fc search drive generator 49 to the Fc-actuator 14.
- the Fc search drive generator 49 sends a drive signal for moving the condenser lens 13 up and down in accordance with the movement amount from the Fc movement amount calculator 47 to the Fc functioner 14 via the selector 22. Further, after the condenser lens 13 is moved, the search procedure indicator 41 is connected to operate the selector 22 so as to send a signal from the Fc filter 21 to the Fc feature unit 14.
- Step S304 The search procedure indicator 41 determines whether the movement in the track direction is a rough search operation. For example, when the movement amount in the track direction from the Tk movement amount calculator 48 is a predetermined number or more, the search procedure indicator 41 determines that the movement in the track direction is a rough search operation.
- Step S305 When the movement in the track direction is a rough search operation, it is determined whether or not a control abnormality has occurred. For example, the control abnormality detector 60 determines that a control abnormality has occurred when the absolute value of the FE signal from the FE generator 20 exceeds a predetermined level.
- Step S306 When the movement in the track direction is a rough search operation and a control abnormality occurs, the search procedure indicator 41 puts focus control into a non-operating state. Search procedure finger The indicator 41 discriminates the occurrence of the control abnormality from the signal from the control abnormality detector 60. The search procedure indicator 41 operates the selector 22 so that the signal from the Fc filter 21 is not sent to the Fc feature unit 14.
- Step S307 The focus of the light beam is moved in the track direction regardless of the force at which the control abnormality occurs.
- the search procedure indicator 41 is connected to operate the selector 32 and send a signal from the Tk search drive generator 50 to the Tk actuator 15.
- the Tk search drive generator 50 sends a drive signal for moving the condenser lens 13 in the radial direction according to the movement amount from the Tk movement amount calculator 48 via the selector 32 to the Tk actuator 15
- Step S308 Sets tracking control to the operating state.
- the search procedure indicator 41 operates the selector 32 so as to send the signal from the Tk filter 31 to the Tk featurer 15.
- Step S309 When the movement in the track direction is not a rough search operation, it is determined whether or not a control abnormality has occurred. For example, the control abnormality detector 60 determines that a control abnormality has occurred when the absolute value of the FE signal from the FE generator 20 exceeds a predetermined level.
- Step S310 When a control abnormality occurs, tracking control is set to an operating state.
- the search procedure indicator 41 operates the selector 32 so as to send the signal from the Tk filter 31 to the Tk featurer 15.
- Step S311 The focal point of the light beam is moved in the track direction.
- the search procedure indicator 41 operates to operate the selector 32 so that the added value of the signal from the Tk filter 31 and the signal from the Tk search drive generator 50 is sent to the Tk character 15.
- the Tk search drive generator 50 sends a drive signal for moving the condenser lens 13 in the radial direction to the Tk actuator 15 via the selector 32 according to the movement amount from the Tk movement amount calculator 48. .
- the selector 32 is connected so as to send only the signal from the Tk filter 31 to the Tk actuator 15.
- step S311 The search procedure indicator 41 operates so as to operate the selector 32 so that only the signal from the Tk search drive generator 50 is sent to the Tk actuator 15. Further thereafter, the selector 32 is connected so as to send only the signal from the Tk filter 31 to the Tk actuator 15.
- Step S312 When the control abnormality occurs, the focus control is set to a non-operation state.
- the search procedure indicator 41 operates the selector 22 so that the signal from the Fc filter 21 is not sent to the Fc functioner 14! /.
- Fig. 11 (a) in the background art, when the focus of the light beam moves across the information surface, the spherical aberration setting related to the movement of the focus of the light beam in the focus direction and the track direction The spherical aberration setting related to the movement of the focal point of the light beam is individually performed.
- FIG. 11B in the first embodiment described in the above procedure, when the focal point of the light beam moves across the information surface, the focal point of the light beam moves in the focus direction. And spherical aberration setting related to the movement of the focus of the light beam in the track direction. Search time can be shortened by setting spherical aberration at a time.
- the time required to set the spherical aberration in (b) is shorter than the total time required for the two “changes in the amount of spherical aberration” in FIG. 11 (a). This is because the time required for acceleration / deceleration can be shortened and the maximum speed can be improved by setting the spherical aberration at one time.
- the spherical aberration setting is already set to the spherical aberration amount at the target information surface and the target radial position. Has been. For this reason, when returning from an abnormal state of focus control, it is possible to move in the track direction while keeping focus control inactive. Complete, then pull in focus control.
- the spherical aberration setting is adjusted to the radial position where the abnormality occurred, the focus control is pulled in, and the spherical aberration setting is set again to the target radial position. It is necessary to move in the direction of the track to match. For this reason, in the first embodiment, it is possible to shorten the time for setting the spherical aberration in the search operation.
- the spherical aberration setting is set to the spherical aberration amount at the target information surface and the target radial position before the movement in the focus direction or the movement in the track direction. For this reason, even if the focus control becomes abnormal before moving in the track direction, the radial position of the focal point of the optical beam is matched with the target radial position for which spherical aberration is set. Move the focus in the track direction. Such an operation is premised on that the focal point of the light beam can be moved in the track direction even when the focus control is not in an operating state. For this reason
- Step S401 The search procedure indicator 41 determines whether the movement in the track direction is a rough search operation. For example, when the movement amount in the track direction from the Tk movement amount calculator 48 is a predetermined number or more, the search procedure indicator 41 determines that the movement in the track direction is a rough search operation.
- Step S402 When the movement in the track direction is a rough search operation, the tracking control is set to a non-operation state.
- the search procedure indicator 41 operates the selector 32 so that the signal from the Tk filter 31 is not sent to the Tk architect 15.
- Step S403 Move the focus of the light beam in the track direction.
- search procedure finger The indicator 41 is connected to operate the selector 32 and send the signal from the Tk search drive generator 50 to the Tk actuator 15.
- the Tk search drive generator 50 sends a drive signal for moving the condenser lens 13 in the radial direction according to the movement amount from the Tk movement amount calculator 48 to the Tk actuator 15 via the selector 32. .
- Step S404 When the movement in the track direction is not a rough search operation, the focus of the optical beam is moved in the track direction.
- the search procedure indicator 41 operates to operate the selector 32 so that the added value of the signal from the Tk filter 31 and the signal from the Tk search drive generator 50 is sent to the Tk feature controller 15.
- the Tk search drive generator 50 sends a drive signal for moving the condenser lens 13 in the radial direction to the Tk actuator 15 via the selector 32 in accordance with the movement amount from the Tk movement amount calculator 48.
- the selector 32 is connected so that only the signal from the Tk filter 31 is sent to the Tk actuator 15.
- step S404 the search procedure indicator 41 operates the selector 32 so that only the signal from the Tk search drive generator 50 is sent to the Tk actuator 15. Further thereafter, the selector 32 is connected so as to send only the signal from the Tk filter 31 to the Tk actuator 15.
- Step S405 The tracking control is deactivated.
- the search procedure indicator 41 operates the selector 32 so that the signal from the Tk filter 31 is not sent to the Tk featurer 15.
- Step S406 It is determined whether a control abnormality has occurred.
- the control abnormality detector 60 determines that a control abnormality has occurred when the absolute value of the FE signal from the FE generator 20 exceeds a predetermined level.
- Step S407 If a control abnormality has occurred, change to a spherical amount corresponding to the target address.
- the search procedure indicator 41 determines the occurrence of a control abnormality by a signal from the control abnormality detector 60. Further, the search procedure indicator 41 operates the spherical aberration setting unit 52 when no control abnormality has occurred.
- the spherical aberration setting unit 52 detects the spherical signal according to the signal from the spherical aberration calculator 51 according to the operation signal from the search procedure indicator 41.
- the spherical aberration generator 16 is driven so as to set the surface aberration amount.
- Step S408 The focus of the light beam is moved in the focus direction.
- the search procedure indicator 41 is connected so as to operate the selector 22 and send the signal from the Fc search drive generator 49 to the Fc-actuator 14.
- the Fc search drive generator 49 sends a drive signal for moving the condenser lens 13 up and down in accordance with the movement amount from the Fc movement amount calculator 47 to the Fc functioner 14 via the selector 22.
- the selector 22 is connected so as to send a signal from the Fc filter 21 to the Fc functioner 14.
- Step S409 When a control abnormality occurs, the focus control is set to a non-operation state.
- the search procedure indicator 41 operates the selector 22 so that the signal from the Fc filter 21 is not sent to the Fc functioner 14! /.
- Step S410 Change to a spherical aberration amount for focus pull-in operation.
- the search procedure indicator 41 operates the spherical aberration setting unit 52 and drives the spherical aberration generator 16 so as to set the amount of spherical aberration according to the signal from the spherical aberration reference unit 61.
- Step S411 Set the focus control to the operating state.
- the search procedure indicator 41 operates the selector 22 so that the signal from the Fc filter 21 is sent to the Fc featurer 14.
- Step S412 The tracking control is set to the operating state.
- the search procedure indicator 41 operates the selector 32 so as to send the signal from the Tk filter 31 to the Tk featurer 15.
- Fig. 11 (a) in the background art, when the focus of the light beam moves across the information surface, the spherical aberration setting related to the movement of the focus of the light beam in the focus direction and the track direction The spherical aberration setting related to the movement of the focal point of the light beam is individually performed.
- FIG. 11B in the first embodiment described in the above procedure, when the focal point of the light beam moves across the information surface, the focal point of the light beam moves in the focus direction. And spherical aberration setting related to the movement of the focus of the light beam in the track direction. Search time can be shortened by setting spherical aberration at a time.
- the time required to set the spherical aberration in (b) is shorter than the total time required for the two “changes in the amount of spherical aberration” in FIG. 11 (a). This is because the time required for acceleration / deceleration can be shortened and the maximum speed can be improved by setting the spherical aberration at one time.
- force focus control pull-in is performed with the spherical aberration setting necessary to activate the focus control. This makes it possible to stabilize the focus control pull-in. As a result, the increase in the recovery time due to the failure of the focus control pull-in can be suppressed, and the expected value for the search time can be shortened.
- the search can be quickly performed by changing the spherical aberration amount based on the information surface position and the radial position to be searched at once.
- the focus control becomes abnormal during the search operation, it can be quickly returned.
- the movement in the track direction is performed even when the focus control becomes abnormal before the movement in the track direction.
- the movement in the track direction may be continued even when the focus control becomes abnormal while moving in the track direction.
- the amount of spherical aberration is changed according to the information surface on which the focus is pulled.
- the information surface for pulling in the force may be changed according to the set spherical aberration amount.
- the search procedure indicator 41 detects the control abnormality without providing the control abnormality detector 60. May be. That is, the search procedure indicator 41 may perform the same operation as the control abnormality detector 60. Further, the search procedure indicator 41 may be realized by a control unit (not shown) that controls the entire optical disc apparatus 100. (Embodiment 2)
- FIG. 4 shows a block configuration of the optical disc device 200.
- FIG. 5 shows an example of a flowchart of the search movement operation executed by the search procedure indicator 42.
- Fig. 6 (a) shows an example of the radial position of the light beam with respect to the optical disc 1.
- FIG. 6 (b) shows an example of the signal output from the spherical aberration setting unit 52.
- the horizontal axis represents time.
- Fig. 12 (a) shows an example of a time chart of the search operation in the background art.
- FIG. 12 (b) shows an example of a time chart of the search operation in the second embodiment.
- Figure 12 shows the length force of each block and the time required for each process.
- the spherical aberration deriving means is a moving position calculator 45 and a spherical aberration calculator 51.
- the track search means is a Tk movement amount calculator 48 and a Tk search drive generator 50.
- the search procedure instruction means is a search procedure indicator 42.
- the search commander 40 sends a search operation start command to the search procedure indicator 42 so that the focal point of the light beam is positioned at the target address, and also sends the target address to the movement position calculator 45, the Fc movement amount calculator 47, And Tk movement amount calculator 48.
- the search procedure indicator 42 sends the operation signal to the selector 22, the selector 32, the Fc search drive generator 49, the Tk search drive generator 50, and the spherical aberration setting device 52 in accordance with a predetermined procedure described later using a flowchart or the like. send.
- the Tk movement amount calculator 48 calculates the movement amount in the track direction for the focal point of the light beam to reach the target address. The calculation result is sent to the Tk search drive generator 50 and the search procedure indicator 42.
- the Tk search drive generator 50 generates a drive waveform corresponding to the movement amount from the Tk movement amount calculator 48 in response to the operation signal from the search procedure indicator 42, and sends it to the Tk character 15 via the selector 32. .
- the movement position calculator 45 calculates the information surface position and the radial position of the optical disc 1 where the target address from the search command unit 40 exists, and sends it to the spherical aberration calculator 51.
- the spherical aberration calculator 51 sends the spherical aberration setting amount stored in advance according to the information surface position and the radial position from the movement position calculator 45 to the spherical aberration setter 52.
- the spherical aberration generator 16 is driven so that the spherical aberration amount at the focal point of the light beam becomes the spherical aberration amount from the spherical aberration calculator 51 in accordance with the operation signal from the indicator 42.
- Step S501 The search procedure indicator 42 determines whether the movement in the track direction is a rough search operation. For example, when the movement amount in the track direction from the Tk movement amount calculator 48 is a predetermined number or more, the search procedure indicator 42 determines that the movement in the track direction is a rough search operation.
- Step S502 When the movement in the track direction is a coarse search operation, the tracking control is set to a non-operation state.
- the search procedure indicator 42 operates the selector 32 so that the signal from the Tk filter 31 is not sent to the Tk architect 15.
- Step S503 The focal point of the light beam is moved in the track direction, and at the same time, the spherical aberration amount corresponding to the target address is changed.
- the search procedure indicator 42 is connected so as to operate the selector 32 and send a signal from the Tk search drive generator 50 to the Tk actuator 15.
- the Tk search drive generator 50 sends a drive signal for moving the condensing lens 13 in the radial direction in accordance with the movement amount from the Tk movement amount calculator 48 to the Tk feature data 15 via the selector 32. send.
- the search procedure indicator 42 operates the spherical aberration setting unit 52.
- the spherical aberration setting unit 52 drives the spherical aberration generator 16 so as to set the amount of spherical aberration according to the signal from the spherical convergence calculator 51 in accordance with the operation signal from the search procedure indicator 42.
- Step S504 When the movement in the track direction is not a rough search operation, the focus of the optical beam is moved in the track direction.
- the search procedure indicator 42 is connected to operate the selector 32 and send the added value of the signal from the Tk filter 31 and the signal from the Tk search drive generator 50 to the Tk actuator 15.
- the Tk search drive generator 50 sends a drive signal for moving the condenser lens 13 in the radial direction according to the movement amount from the Tk movement amount calculator 48 to the Tk actuator 15 via the selector 32.
- the selector 32 is connected so as to send only the signal from the Tk filter 31 to the Tk actuator 15.
- step S504 the search procedure indicator 42 operates to operate the selector 32 so that only the signal from the Tk search drive generator 50 is sent to the Tk architect 15. Further thereafter, the selector 32 is connected so as to send only the signal from the Tk filter 31 to the Tk actuator 15.
- Step S505 Disable tracking control.
- the search procedure indicator 42 operates the selector 32 so that the signal from the Tk filter 31 is not sent to the Tk featurer 15.
- Step S506 The amount of spherical aberration is changed according to the target address.
- the spherical aberration setting unit 52 drives the spherical aberration generator 16 so as to set the amount of spherical aberration according to the signal from the spherical aberration calculator 51.
- Step S507 Move the focus of the light beam in the focus direction.
- the search procedure indicator 42 is connected to operate the selector 22 and to send the signal from the Fc search drive generator 49 to the Fc feature driver 14.
- the Fc search drive generator 49 sends a drive signal for moving the condenser lens 13 up and down in accordance with the movement amount from the Fc movement amount calculator 47 to the Fc functioner 14 via the selector 22. After the condenser lens 13 is moved, the selector 22 is connected so as to send a signal from the Fc filter 21 to the Fc functioner 14.
- Step S508 The tracking control is set to the operating state.
- the search procedure indicator 42 operates the selector 32 so that the signal from the Tk filter 31 is sent to the Tk featurer 15.
- the spherical aberration setting and the movement of the focus of the light beam are completed at the same time.
- the aberration change starts at the timing TB in Fig. 6.
- the spherical aberration amount changing operation is performed simultaneously with other search operations.
- the time required for the entire search can be shortened and the search can be performed quickly.
- the change of the spherical aberration amount and the movement in the track direction are performed simultaneously. That is, the operating time zones for both the change in spherical aberration and the movement in the track direction overlap.
- the change of the spherical aberration amount and the movement in the focus direction may be performed simultaneously.
- each start timing is determined so that the end of the change of the spherical aberration amount and the end of the movement in the track direction are made at the same time, but both the start timing and the end timing are made at the same time.
- the operating speed of at least one of the change in the amount of spherical aberration and the movement in the track direction may be determined.
- each block may be individually chipped by a semiconductor device such as an LSI, or may be chipped to include a part or all of the blocks. Also good!
- each block other than the optical disc 1 and the optical head 10 may be individually made into one chip, or may be made into one chip so as to include a part or all of them. .
- IC integrated circuit
- system LSI system LSI
- super LSI super LSI
- unroller LSI unroller LSI
- the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. It is also possible to use a field programmable gate array (FPGA) that can be programmed after LSI manufacturing, or a reconfigurable processor that can reconfigure the connection and settings of circuit cells inside the LSI.
- FPGA field programmable gate array
- a reconfigurable processor that can reconfigure the connection and settings of circuit cells inside the LSI.
- integrated circuit technology that replaces LSI emerges as a result of advances in semiconductor technology or other derived technologies, it is naturally also possible to perform functional block integration using that technology. Biotechnology can be applied.
- the present invention can be used for an optical disc apparatus that performs a search operation when recording or reproducing on a disc-shaped information carrier (hereinafter referred to as an optical disc) that can perform recording.
- an optical disc a disc-shaped information carrier
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Head (AREA)
- Optical Recording Or Reproduction (AREA)
- Moving Of The Head For Recording And Reproducing By Optical Means (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/630,832 US20080285408A1 (en) | 2004-06-24 | 2005-06-23 | Optical Disk Device and Optical Disk Semiconductor |
EP05752913A EP1764788A4 (en) | 2004-06-24 | 2005-06-23 | OPTICAL DATA BEARING DEVICE AND OPTICAL DATA CARRIER SEMICONDUCTOR |
JP2006528578A JP4331753B2 (ja) | 2004-06-24 | 2005-06-23 | 光ディスク装置および光ディスク装置の集積回路 |
Applications Claiming Priority (2)
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JP2004186072 | 2004-06-24 | ||
JP2004-186072 | 2004-06-24 |
Publications (2)
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WO2006001327A1 true WO2006001327A1 (ja) | 2006-01-05 |
WO2006001327B1 WO2006001327B1 (ja) | 2006-03-09 |
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/011515 WO2006001327A1 (ja) | 2004-06-24 | 2005-06-23 | 光ディスク装置および光ディスク半導体 |
Country Status (5)
Country | Link |
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US (1) | US20080285408A1 (ja) |
EP (1) | EP1764788A4 (ja) |
JP (1) | JP4331753B2 (ja) |
CN (1) | CN100487804C (ja) |
WO (1) | WO2006001327A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1826755A2 (en) * | 2006-02-24 | 2007-08-29 | Samsung Electronics Co., Ltd. | Optical pickup control apparatus and method |
US8223602B2 (en) | 2006-05-23 | 2012-07-17 | Hitachi, Ltd. | Optical disc drive |
EP2485075A1 (en) | 2007-06-14 | 2012-08-08 | Nokia Corporation | Displays with integrated backlighting |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007080402A (ja) * | 2005-09-15 | 2007-03-29 | Hitachi Ltd | 光ディスク装置 |
US20100034061A1 (en) * | 2008-08-11 | 2010-02-11 | Chih-Ching Yu | Optical storage apparatus and control chip for accessing an optical disc and method thereof |
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- 2005-06-23 JP JP2006528578A patent/JP4331753B2/ja not_active Expired - Fee Related
- 2005-06-23 WO PCT/JP2005/011515 patent/WO2006001327A1/ja active Application Filing
- 2005-06-23 US US11/630,832 patent/US20080285408A1/en not_active Abandoned
- 2005-06-23 CN CNB200580019650XA patent/CN100487804C/zh not_active Expired - Fee Related
- 2005-06-23 EP EP05752913A patent/EP1764788A4/en not_active Withdrawn
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EP2485075A1 (en) | 2007-06-14 | 2012-08-08 | Nokia Corporation | Displays with integrated backlighting |
Also Published As
Publication number | Publication date |
---|---|
US20080285408A1 (en) | 2008-11-20 |
CN1969331A (zh) | 2007-05-23 |
JPWO2006001327A1 (ja) | 2008-04-17 |
CN100487804C (zh) | 2009-05-13 |
EP1764788A1 (en) | 2007-03-21 |
JP4331753B2 (ja) | 2009-09-16 |
EP1764788A4 (en) | 2009-01-21 |
WO2006001327B1 (ja) | 2006-03-09 |
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