Patent application number | Description | Published |
20080310265 | METHOD OF RECORDING DATA, METHOD OF MANUFACTURING READ-ONLY OPTICAL DISC, AND READ-ONLY OPTICAL DISC - A method of recording data includes: a first recording step of recording data in a condition that, within a certain error correction block in a data format in which error correction blocks with n rows and m columns including at least main data, error detection code, and error correction parity are formed, an allocated location of additional supplementary information is set in a location in the same column as an allocated location of the error detection code, and an additional recording area is formed for recording additional information containing the additional supplementary information and the error detection code and the error correction parity necessary to be recorded according to the recording of the additional supplementary information; and a second recording step of recording the additional information in the additional recording area after the data recording at the first step is executed. | 12-18-2008 |
20090041933 | RECORDING DRIVE WAVEFORM ADJUSTING METHOD FOR MANUFACTURING MASTER DISC, MASTER DISC MANUFACTURING METHOD, MASTER DISC MANUFACTURING APPARATUS, AND MASTER DISC - A recording drive waveform adjusting method for manufacturing a master disc is provided. The method includes forming an exposed area in an inorganic resist layer for test exposure by irradiating a master disc having the inorganic resist layer with laser light of a recording power based on a recording drive waveform according to a test recording signal. The method also includes obtaining reflected-light information by irradiating the exposed area formed in the test exposure with laser light of a reproducing power, determining whether the recording drive waveform is appropriate by using the reflected-light information, and correcting the recording drive waveform if the recording drive waveform is determined to be inappropriate in the determination. | 02-12-2009 |
20090080312 | READ-ONLY OPTICAL DISC MEDIUM AND METHOD OF MANUFACTURING SAME - At the stage where disc substrates are to be manufactured in mass production by using a stamper, a section where pits/lands are not formed is formed in advance as an additional information recording section among recording tracks formed by a recording data sequence of pits/lands. A metal alloy reflection film is coated on the information recording surface including such an additional information recording section | 03-26-2009 |
20100180125 | INFORMATION SERVICE METHOD, INFORMATION SERVICE UNIT, RECORDING OR REPRODUCING CONTROLLING METHOD, AND RECORDING AND/OR REPRODUCING UNIT - Unique identification information is prerecorded on a disc. The identification information is registered to a server along with user's license when he or she buys the disc. When an terminal unit reproduces data from the disc, identification information is read and transmitted to the server through the Internet. The server creates a key that controls to reproduce data from the disc in accordance with the license identified by the identification information and transmits the key to the terminal unit along with the user's license information for the disc. The terminal unit controls to reproduce contents of the disc in accordance with key and license information transmitted from the server. The license for each disc is managed in accordance with the identification information. Thus, different services can be provided for individual discs. | 07-15-2010 |
20100220571 | Optical disc medium and data recording method and apparatus - An optical disc medium and corresponding optical recording method and optical recording apparatus. The optical disc medium comprises a substrate on which a shape according to modulated information data has been formed, and a coating film formed on the substrate. Known data is recorded in a predetermined location of the information data, with the known data being rewritten as postscript information by recording a postscript portion to the coating film to alter a portion of the known data, wherein the postscript information comprises readable non-error data. | 09-02-2010 |
20110207035 | Exposure apparatus and exposure method - An exposure apparatus includes an exposure unit selectively performing exposure on a resist layer with a first laser beam, focused by a lens system, in a pattern including pits and lands arranged in a scanning direction; a detecting unit detecting a reflection of a second laser beam applied through the lens system to the resist layer selectively exposed to the first laser beam, the second laser beam being produced by changing a focal length of the lens system such that the resist layer is prevented from responding thereto; a calculating unit calculating, from a result of the detection, a displacement between center axes of signal waveforms representing beams reflected from first and second portions of the pattern having a smallest width and a larger width, respectively; a setting unit setting the focal length of the lens system to such a value that the displacement is maximal; and a control unit controlling the exposure unit to expose the resist layer to the first laser beam focused with the focal length set by the setting unit. | 08-25-2011 |
20120207006 | RECORDING APPARATUS, MASTER MANUFACTURING APPARATUS, AND METHOD OF MANUFACTURING AN OPTICAL DISC RECORDING MEDIUM - A recording apparatus includes a rotation driving portion that rotates and drives an optical disc master; and a recording portion that performs an information recording on the optical disc master, by performing a laser beam irradiation on the optical disc master, based on a recording waveform which has a land pulse of a first power, a recording waveform portion having a recording pulse of a second power higher than the first power, and a cooling pulse which has a third power lower than the first power and is inserted between the land pulse and the recording waveform portion. | 08-16-2012 |
20120236697 | MASTER STRATEGY ADJUSTMENT METHOD AND DISC MANUFACTURING METHOD - A master strategy adjustment method includes performing first recording on a master with a predetermined strategy, performing first measurement of an evaluation value of the master of the first recording, forming a first optical disc based on the master after the first recording, performing second measurement of an evaluation value of the optical disc formed as the first optical disc, calculating a target value of the evaluation value of the master based on a difference with the first measurement evaluation value and the second measurement evaluation value, and adjusting the strategy so that the evaluation value with regard to the master matches the target value, performing recording on the master with the adjusted writing strategy, performing measurement of the evaluation value of the master, and performing determination of whether the evaluation value is within a predetermined range with the target value as a reference until an affirmative result is obtained. | 09-20-2012 |
20130064061 | MARK FORMING APPARATUS AND MARK FORMING METHOD - Provided is a mark forming apparatus including a head unit that forms a mark on a recording medium through laser beam irradiation based on a laser driving pulse, a control signal generation unit that generates a control signal at a start timing of the laser driving pulse supplied to the head unit, a multiplier that multiples a synchronization reference signal used to synchronize with the process of forming the mark on the recording medium in the head unit to generate a multiple signal, and a laser driving pulse generation unit that generates the laser driving pulse by setting the start timing of the laser driving pulse at resolution based on the multiple signal in accordance with the control signal. | 03-14-2013 |
20130142028 | OPTICAL RECORDING MEDIUM, MANUFACTURING METHOD FOR OPTICAL RECORDING MEDIUM - The present disclosure relates to an optical recording medium and a manufacturing method for an optical recording medium capable of obtaining an appropriate reproduction signal, as a bar code-shaped recording region (BCA) on an optical recording medium. | 06-06-2013 |
20130155828 | RECORDING METHOD AND RECORDING APPARATUS - A recording method includes: generating a laser driving pulse, of which the number depends on a length of a mark which is formed, and where a pulse level of a pulse column at least in an intermediate pulse besides the lead pulse and the last pulse is sequentially decreased; performing laser emission, based on the laser driving pulse; and performing mark formation using thermal recording by laser irradiation on a recording medium. | 06-20-2013 |
20140362675 | EXPOSURE DEVICE, RECORDING MEDIUM, RECORDING DEVICE, AND REPRODUCING DEVICE - There is provided a recording medium including: simple tracks each configured of arranged pits or arranged marks; and grooved tracks each configured of pits or marks and grooves, the grooves being inserted between the pits or between the marks. The simple tracks and the grooved tracks are arranged alternately in a radial direction at a track pitch of 0.27 micrometers or smaller. | 12-11-2014 |