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公开(公告)号：EP1805759B1
公开(公告)日：2008-09-03
申请号：EP05789054.3
申请日：2005-10-07
CPC分类号： G11B7/0037 , G11B7/0045 , G11B19/00 , G11B23/40
摘要： The present invention relates to an optical recording apparatus capable of writing information on an optical medium in a writing mode and capable of writing a label image on an optical medium in a label mode. The apparatus has a displaceable optical head with a radiation source capable of emitting radiation. The apparatus further contains one or more processing means adapted to: analyze radiation reflected from the medium, control the radial position of the optical head, control the focal point of the radiation relative to the optical medium, and control the radiation source. In label mode, the optical recording apparatus is adapted to turn off at least one of the processing means for a pre-defined period of time in order to reduce the power consumption and in turn the temperature of the apparatus.
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2.发明授权METHOD AND DEVICE FOR PERFORMING TILT CORRECTION USING MULTI-DIMENSIONAL ACTUATOR 有权方法和设备倾斜校正通过一个MEHRDIMENSIONALAKTUATORS手段
公开(公告)号：EP1500091B1
公开(公告)日：2008-01-02
申请号：EP03712522.6
申请日：2003-04-01
IPC分类号： G11B7/095
CPC分类号： G11B7/0956
摘要： The present invention relates to method and device for performing tilt control. A focus and a tilt controlling output is generated, and a focusing and tilt state of an optical recording/reproducing beam is controlled by determining a radial tilt value based on a differentiation of focus control values obtained at different radii of said optical disk (1). The combination of e.g. a 3D actuator with the dz/dr tilt measurement provides the advantage that focus and tilt adjustment can be performed in the same element. Thereby, influences or measurement variations caused by environmental conditions and/or circuit characteristics can be minimized to reduce compensations requirements. Furthermore, a 3D actuator (11) with a split coil arrangement may be used to provide a three-dimensional focus adjustment. Thereby, the 3D actuator (11) can be used for feed forward tilt compensation without offset or gain errors and without any additional sensor.
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公开(公告)号：EP1771779A1
公开(公告)日：2007-04-11
申请号：EP05748187.1
申请日：2005-06-14
CPC分类号： G05D23/19
摘要： A system for controlling the temperature in an electrical component. The power dissipation of the electrical component is measured and compared to a desired power dissipation. In case the measured power dissipation differs from the desired power dissipation a signal, preferably a signal having an energy outside the region of normal operation of the electrical component, is injected into the electrical component in order to control the power dissipation and thereby the temperature of the electrical component. May also be used for controlling the temperature of another component positioned in the vicinity of the electrical component, e.g. an optical component, such as a lens. Advantageous because a separate temperature sensor is avoided. Suitable for use in an optical disk drive, in particular for blu-ray disks.
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公开(公告)号：EP1629469A1
公开(公告)日：2006-03-01
申请号：EP04732686.3
申请日：2004-05-13
IPC分类号： G11B7/095
CPC分类号： G11B7/0901 , G11B7/0956
摘要： A method is described for compensating tilt (0) of an optical disc (2). An optical lens (34), which is pivotably mounted, is pivoted to an optimum pivot position (WoPT) such that the amplitude (ATE) of the push-pull tracking error signal (STE) is maximal. Said optimum pivot position (W0PT) is determined by measuring said amplitude (ATE) at different pivot positions (yr(i)) and calculating a maximum point (yroPT, ATE,MAx) of a best parabolic fit (80) through the measurements (y(i), ATE(i)).
摘要翻译： 描述了一种用于补偿光盘（2）的倾斜（0）的方法。 可枢转地安装的光学透镜（34）枢转到最佳枢轴位置（WoPT），使得推挽跟踪误差信号（STE）的幅度（ATE）最大。 所述最佳枢轴位置（W0PT）通过测量不同枢轴位置处的所述幅度（ATE）（yr（i））并通过所述测量计算最佳抛物线拟合（80）的最大点（yroPT，ATE，MAx） y（i），ATE（i））。
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公开(公告)号：EP1573725A1
公开(公告)日：2005-09-14
申请号：EP03758578.3
申请日：2003-11-04
IPC分类号： G11B7/095
CPC分类号： G11B7/0956
摘要： An apparatus for scanning a track on a record carrier has a head for scanning the track and generating a read signal. The tilt between the head and the record carrier (11) is compensated via a tilt servo loop. Thereto the head is provided with tilt compensating actuators (42). A measure of the tilt is jitter in the read signal generated by a front end (43) and filter (44). A wobble generator (40) provides a wobble signal to the actuators and to an input of multiplier (45) for synchronous detection of the jitter. The output of the multiplier (45) is coupled to a low pass filter (46) for generating a tilt error signal coupled to a tilt controller (47) for generating a tilt control signal.
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6.发明授权A METHOD FOR GRADUALLY CLOSING DOWN A FOCUS CONTROL LOOP OF AN OPTICAL DRIVE SYSTEM 有权方法关闭PROGRESSIVE聚焦控制电路的光驱动系统的
公开(公告)号：EP1905017B1
公开(公告)日：2008-12-31
申请号：EP06765835.1
申请日：2006-06-23
CPC分类号： G11B7/0945
摘要： The present invention relates to a method for operating an optical drive system (12) capable of reproducing/recording information from/to an optical carrier (1), wherein the optical drive system includes a focus controller (PID) for controlling a focus actuator (4), and a focus memory loop (ML) for applying a stored correction signal to the focus actuator (4). The method aims at avoiding impacts between the focussing means (3) and the optical carrier (1), by gradually stopping the focus control loop in response to an event, such as a user initiated ejection of the optical carrier. The gradual stop of the focus control loop is achieved by gradually reducing a memory loop parameter of the focus memory loop (ML), and by gradually reducing a controller parameter of an integrating part (I) of the focus controller (PID). It is an advantage of the invention that the phase of the stored correction signal is synchronized with the angular position of optical carrier (1) during the gradual stopping.
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公开(公告)号：EP1927105A2
公开(公告)日：2008-06-04
申请号：EP06795818.1
申请日：2006-08-30
CPC分类号： G11B7/0945
摘要： The invention relates to a method of optimizing an optical drive system 101 capable of recording and/or reproducing data to and from an optical carrier 102, such as the high number of different types present e.g. a CD, DVD-SL, DVD-DL, HD-DVD or BD carrier. More specifically, the invention relates to improved radial tracking error signal in the optical drive system and thereby alternatively or additionally also improved carrier recognition in the optical drive system. Disc recognition may be a cumbersome procedure due to influences such as the high number of carrier types present, the tolerances specified for and quality of the carriers, the tolerances within the optical system. E.g. a method and a system is disclosed where one or more parameters are varied 234 and one or more signals are evaluated 232 and based on the evaluation one or more parameters may be provided with a new setting before closing a radial control loop 218 in order to obtain an improved radial tracking error signal and/or improved carrier recognition.
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8.发明公开
公开(公告)号：EP1905021A2
公开(公告)日：2008-04-02
申请号：EP06765940.9
申请日：2006-06-28
IPC分类号： G11B7/09
CPC分类号： G11B7/0948
摘要： The present invention discloses an optical apparatus capable of reproducing/recording information from/to an optical carrier, e.g. a DVD or BD disk. The apparatus has control means for positioning/focusing a radiation beam (5) on the carrier and photo detection means for detection of radiation reflected from the carrier. Additionally, defect detection means (DEFO) for detection of surface defect areas (Al, A2) can indicate where surface defects, e.g. scratches etc., are present. Processing means are adapted for integrating, and preferably differentiate, error signals (RE, FE) immediately after the beam (5.b) is exiting a defect area (Al) for generating adaptive control signals (AD_ RE, AD_ FE). The optical system is adapted to apply the adaptive control signals (AD_ RE, AD_ FE) when the beam is positioned in the defect area (Al) again, thereby reducing off-track deviation as the beam (5.d) exits the defect area (Al).
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9.发明公开
公开(公告)号：EP1905014A2
公开(公告)日：2008-04-02
申请号：EP06765939.1
申请日：2006-06-28
发明人： EL HUSSEINI, Mohamad-Hussein , STEVEN, Stefan, H., G. , GEUSENS, Stefan , RAAYMAKERS, Jeroen, A., L., J.
IPC分类号： G11B7/00
CPC分类号： G11B7/0948 , G11B20/10009
摘要： The present invention relates to a method for operating an optical drive system capable of reproducing/recording information from/to an optical carrier (30), wherein a position error and a speed error of a radiation spot (12, 53) on the carrier has been created due to an unreliable error signal which has been generated due to a surface defect (52). The method includes the steps of registering values of e.g. servo signals, determining the occurrence of a defect using a defect detector DEFO (22), generating a first and a second compensation signal and applying these compensation signals to the control system (10) of the optical drive system. The first compensation signal is capable of reducing the speed error and the second compensation signal is capable of reducing the position error. Thus, the application of the compensation signals immediately after the unreliable error signals reduces the position error and the speed error of the focussed radiation spot (12, 53).
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10.发明公开APPARATUS AND METHOD FOR DISCRIMINATION BETWEEN OPTICAL RECORD CARRIERS OF DIFFERENT FORMATS 审中-公开设备和方法之间的各种尺寸的光学记录介质的差异
公开(公告)号：EP1743334A1
公开(公告)日：2007-01-17
申请号：EP05718690.0
申请日：2005-04-11
IPC分类号： G11B19/12
CPC分类号： G11B19/125
摘要： Apparatus and method for discriminating in an optical drive between discs of different formats, in which the optical disc remains substantially stationary or is arranged to rotate at a very low frequency i.e. significantly lower than that required to perform a data readout or record action for the purpose of measuring the reflectivity thereof by ramping, i.e. moving, the actuator toward the optical disc (step 106a) and, during this ramp, observing (step 106b) the total reflection, known as the Central Aperture (CA), off the disc. After scaling of the reflectivity (at step 108), the system tries to catch focus (step 110) i.e. close the focus servo loop). If, at step (112), the measured reflectivity is far out of range, or the focus catch fails, then the sequence is repeated for the next laser, until the disc format has been accurately determined.
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