Matches 1 - 19 out of 19
Match Document Document Title
7394741 Optical disc reading and reproducing apparatus  
An optical disc reading and reproducing apparatus includes reading means for reading data recorded on an optical disc by applying laser light through an objective lens and detecting its reflected...
7394733 Optical head with spherical aberration correction and method of using same  
An optical head with excellent optical characteristics even when using a light source that substantially has a wavelength broadening is provided. The optical head includes a light source, an...
7394049 Optical disk apparatus and pickup unit  
An optical disk apparatus includes a light emitting unit, a light detecting unit, a tracking error signal generating unit, and a tracking control unit. The light emitting unit emits a single light...
7388820 Optical disc reading and reproducing apparatus  
An optical disc reading and reproducing apparatus includes reading means for reading data recorded on an optical disc by applying laser light to the disc through an objective lens and detecting...
7385896 Focusing controller apparatus and method for an optical disk drive  
A focusing controller and the method thereof for an optical disk drive. The focusing controller includes a filter, a coupler and a focus compensator. The filter filters out a high-frequency...
7385895 Method of discriminating optical disc type and apparatus thereof  
A method of discriminating an optical disc type and an apparatus thereof. The method for an optical disc system of recording and/or reproducing an optical disc that includes an optical pickup...
7382716 Information recording carrier and information reproducing apparatus for the same  
Plural grooves or lands formed in an information recording carrier include at least a wobbling region and data is recorded wobblingly in this wobbling region by phase shift modulation while...
7379405 Method and optical disk drive for promptly protecting voice coil motor thereof from over current  
The invention is disclosed a method for promptly protecting a voice coil motor in an optical disk drive. A step (A) allows a data signal processor (DSP) to execute a protect module of the voice...
7369474 Method of and apparatus for differentiating between writable disc types  
A plurality of types of writable discs on which wobbles having a predetermined frequency containing absolute addresses and/or various pieces of information on the writable discs can be...
7362681 Recording medium type determining apparatus and method for determining presence of wobble on a recording medium  
A push-pull signal Spp fetched with tracking open is smoothed to a smoothing signal Spp to remove signal components generated wobbling due to radial runout, and the smoothing signal is binarized to...
7355945 Optical pickup adjusting apparatus and adjusting method  
An adjustment apparatus for adjusting an optical pickup capable of recording and/or reproducing optical discs of different sorts. The adjustment apparatus is an adjustment optical disc having a...
7355931 Optical disc center error amplitude calibration  
A method for calibrating a center error signal in an optical disc system, comprising the steps of (i) measuring a peak-to-peak value of the center error signal, (ii) computing a nominal...
7345266 Optical medium judging method for avoiding the collision of an objective lens with a disk  
The present invention relates to an optical medium judging method for avoiding the collision of an objective lens with a disk or the failure to judge a warped disk when the optical disk drive...
7333412 Optical recording/reproducing apparatus, focusing method therefor, and optical disk recording medium  
A method and apparatus for realizing a stable focus jump operation even in a case where a waveform of an S-curve of a focus error signal fluctuates due to aberration due to fluctuation of a...
7324419 Focus control via AC input signal  
A method of mapping a surface of a printable medium comprises illuminating the surface with electromagnetic radiation and focusing the electromagnetic radiation with a focusing means. The method...
7319651 Recording apparatus and recording method  
The amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is...
7319650 Recording apparatus and recording method  
The amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is...
7319649 Recording apparatus and recording method  
The amount of light reflected from a disk is detected, and it is determined according to the amount of reflected light whether the disk is a recordable disk or a rewritable disk. The disk is...
7317673 Apparatus and method for setting offset of digital, video disc, and apparatus and method for adjusting offset  
An apparatus for setting an offset in a DVD player includes: an offset measuring unit which measures one or more offset parameters for initial reproducing operations of the DVD player; and an...
Matches 1 - 19 out of 19