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Dynamic Information Storage Or Retrieval > Specific Detail Of Information Handling Portion Of System > Radiation Beam Modification Of Or By Storage Medium > Light Intensity Adjustment Or Maintenance Light Intensity Adjustment Or MaintenanceLight Intensity Adjustment Or Maintenance patent applications listed are from June 2005 to current and include Date, Patent Application Number, Patent Title, Patent Abstract summary and are linked to the corresponding patent application page.12/20/07 - 20070291621 - Method of setting write conditions for optical recording media A method is provided to enable efficient optimization of write pulse waveforms using a trial writing region. To record information on an optical recording medium using a laser beam, the method includes: recording a specific pattern of multiple record marks on the trial writing region of the optical recording medium; ... 11/29/07 - 20070274191 - Laser pulse control circuit Disclosed is a laser pulse controlling circuit that, when the laser device is driven with laser pulses having the first and the second illumination levels, causes the first and the second illumination level setting units to set the first and the second illumination levels corresponding to a predetermined ratio of ... 10/04/07 - 20070230315 - Laser drivers that provide double buffering of serial transfers Double buffering of serial transfers is provided in order to allow for increased serial transfer rate without requiring increased internal processing speeds. A laser driver serial controller serially receives a word including address bits and data bits. During a write operation, the address bits are serially shifted into an address ... 10/04/07 - 20070230314 - Recording medium, recording method, reproduction method, recording apparatus and reproduction apparatus A recording medium comprising a recording area, the recording area includes a first area and a second area, the first area includes a frame area, the frame area includes an area in which a second synchronization code sequence and at least a portion of data are to be recorded, and ... 08/02/07 - 20070177487 - Optical disc apparatus and optical disc In a user data area, control of recording laser power cannot be performed accurately. In recording data in the user data area, data for the control of recording laser power is also recorded together with user data to be recorded. By reproducing the data for control of recording laser power, ... 07/26/07 - 20070171805 - Optical disc apparatus and laser power control method In laser power control, optical and electronic components are subjected to correction on their temperature characteristics to stabilize write/read characteristics. The present invention comprises a power detector which detects the power of laser light generated by a pickup, a temperature detector which detects the temperature in the pickup, a calculating ... 07/26/07 - 20070171804 - Power control device and method of multi base powers for optical disk drive A power control device of multi base powers is provided for an optical read/write module of an optical disk drive. The optical read/write module generates a power feedback signal and a temperature signal. The power control device includes a base power selecting module, a current compensating module, a current computing ... 07/12/07 - 20070159953 - Optical disc apparatus An optical disc apparatus includes a liquid crystal driver, a laser driver, a storage portion, and a control portion for controlling them, the storage portion stores a correction table of current to be supplied to a laser beam source with a parameter of a voltage to be applied to a ... 07/05/07 - 20070153666 - Optical information recording medium, optical information recording apparatus and method The present invention is applicable to a recording apparatus of a CD or DVD, a recording method thereof and a recording medium, and an object of the present invention is to clearly record a second information such as characters and figures between two recording levels in an optical disk. The ... 06/07/07 - 20070127351 - Optical disk device, semiconductor laser drive device and optical pickup device Provided is a device which can reduce waveform distortion of a laser drive signal caused by impedance mismatching between a laser drive device and a semiconductor laser over a wide band, and which can enhance the power efficiency of higher frequency superposition during reproduction. The output impedance of the laser ... 05/10/07 - 20070104075 - Communication diode driver circuit A Communication Diode Driver Circuit (CDDC) for selectively illuminating communication diodes (CDs) in response to incoming digital data pulses with a LED drive current ILED(t) close to a nominal LED drive current IN therefor in a steady state operation of the CDDC. The CDDC includes a driver unit for driving ... 05/03/07 - 20070097837 - Use of external optical feedback in a laser to generate a data signal Disclosed are various systems and methods for generating a data signal. In one embodiment, a system is provided that comprises a laser with a gain medium, the laser being configured to emit optical power. The laser is further configured to receive an external optical feedback optically coupled into the gain ... 03/29/07 - 20070070862 - Optical disc recording/reproducing apparatus After OPC is executed on a DVD+RW, a value of an OPC counter assigned to a DCB of the DVD+RW is read and then temporarily saved in a memory, and then the temporarily saved value is incremented by +1. If an optical disc eject request is received, the value of ... 03/08/07 - 20070053277 - Apparatus and method for controlling recording signals An apparatus and method for controlling a recording signal are provided. The apparatus may include a light generator generating light used to write information to an optical disk, a light amount compensator setting a voltage level of the recording signal as a second level when the write operation is performed ... 02/15/07 - 20070036059 - Light source drive, optical information recording apparatus, and optical information recording method A light source drive which modulates a light source so as to cause the same to emit a light, includes: a superposition current generation part which generates a superposition current approximately corresponding to a charging/discharging current needed for a capacitance occurring in parallel to the light source for a predetermined ... 02/08/07 - 20070030789 - Method and radiation source driving device for controlling radiation power The invention pertains to a method off controlling radiation power of a radiation source (25) comprising the steps of a) measuring a radiated power of the radiation source (25), b) calculating an error value (e) which is indicative of a difference between the 5 radiated power and a setpoint value ... 02/01/07 - 20070025230 - Compensation methods based on laser diode controlling input Methods for system parameter compensation and temperature detection based on a controlling input of a laser diode (LD). The controlling input of the LD is measured and compared with a reference value measured at a known environment. The comparison result is used to tune a system parameter of an optical ... 01/25/07 - 20070019529 - Method and control system for output power control through dynamically adjusting relationship between output power and control value A control method and a control system of output power control for a laser diode. The method includes utilizing a first test control signal for driving the laser diode to generate a first laser beam, detecting power of the first laser beam for generating a first detecting signal, utilizing a ... 01/11/07 - 20070008861 - Apparatus and method for detecting laser dropout Improvements to an optical recording apparatus comprising a laser light source are provided. The improvements include installing a photodiode in an optical path of at least a portion of the laser light beam from the laser light source, and connecting said photodiode to a detection circuit. The photodiode detects the ... 01/04/07 - 20070002717 - Method for designing an optical pickup According to a method for designing an optical pickup including a monolithic laser diode that emits a laser light beam for DVD recording and a laser light beam for CD playback, two photodetective portions provided on the same substrate for receiving the laser light beams, and an objective lens, for ... 12/07/06 - 20060274632 - Output voltage adjusting method for laser power monitoring To make the output voltage of a laser power monitor circuit (12) equal to a predetermined value at a predetermined laser power, adjustment is performed by changing an external variable resistance for output voltage adjustment. To achieve this, adjustment is performed by changing the variable resistance so that the difference ... 11/02/06 - 20060245337 - Method for selecting optimal recording and erasing powers for an optical disk drive A method in which, during an optimal power calibration (OPC) process, an optical disk drive performs a plurality of write tests to an optical disk at a plurality of test powers and measures a corresponding plurality of modulation signal strength values of the optical disk for the plurality of write ... 11/02/06 - 20060245336 - Information recording method, information recording device and recording medium contaning a program The first trial write process obtains an optimum recording power of a test pattern (S1 through S3) even with respect to data having different rules for the recording waveforms corresponding n type data length sets, and the second trial write process using this optimum recording power obtains optimum pulse width ... 09/28/06 - 20060215532 - Optical disc recorder laser power control The present invention is directed to an optical disc recorder laser power control apparatus utilizing two different current sources to solve the problem caused by the contradiction between control resolution and control range. The first current source and the second current source are connected in parallel to a single control ... 09/14/06 - 20060203694 - Information recording and reproducing apparatus An information recording and reproducing apparatus is disclosed. The apparatus includes a running power controlling and recording unit and an interval adjusting unit which adjusts an interval for performing running power control and makes a suitable ROPC operation possible even if conditions for recording information are changed. When data recording ... 09/14/06 - 20060203693 - Optical disc apparatus and method of erasing information recorded thereon In an optical disc apparatus, before the information already existing on an optical disc is erased, the information recorded in a user data area of the optical disc is test-erased with laser light of previously set erasing power first, then after test recording of information in the user date area ... 08/31/06 - 20060193237 - Optical recording apparatus with drawing capability of visible image on disk face A system and method of drawing a visible image on an optical disk are provided. The optical disk is rotated while a optical pickup irradiates a laser beam onto the optical disk to draw the visible image on the optical disk. The rotating state of the optical disk is detected. ... 08/10/06 - 20060176800 - Methods and apparatus to compensate for power output variations over time A method of compensating for output variations in laser power output over time in a system using a laser to record visible marks on an optical disc, the method comprising (a) applying a test light beam from the laser to the optical disc to determine a test value of an ... 07/27/06 - 20060164957 - Optical unit, an optical pick-up apparatus and a method of adjusting an optical axis An optical unit is provided for an optical pick-up apparatus which includes a light source to emit light entering into a recording medium. A light source holder has an optical passage hole formed corresponding to a direction of a reference optical axis of the light toward the recording medium. A ... 07/13/06 - 20060153047 - Optical recording method Provided is an optical recording method for recoding information on a phase-change optical recording medium at a low linear velocity by use of a divided pulse method. When forming a plurality of recording marks by use of a constant divided pulse number m, a light irradiation time period of recording ... 07/13/06 - 20060153046 - Method and apparatus for recording marks on a write-once record carrier The present invention relates to a method and a corresponding apparatus for recording marks representing data in an information layer of a write-once record carrier by irradiating the information layer by means of a radiation beam, wherein a mark is written by a write pulse (10) and said information layer ... 06/15/06 - 20060126477 - Pulse modulation laser writing system A pulse modulation laser writing system generates a motion control file for controlled motion of a sample under modulated laser beam exposure and generates a laser script file for generating a sequence of laser writing processes, such as, ablation, welding, texturing, and dosing, the sample while under motion control. The ... 04/27/06 - 20060087952 - Laser power control system This invention provides a laser power control system to control the power of the emitted laser from an optical pick-up head. The system comprises a temperature sensor and a calculating unit. The temperature sensor is used to detect the temperature of the optical pick-up head and to generate a temperature ... 04/13/06 - 20060077863 - Laser power control circuit and method thereof A laser power control circuit includes a system control module for generating two write channel target values in a calibration mode, a driving module for driving a laser generator, and a detection module for detecting two laser power values of the laser generator. A write channel control module of the ... 03/30/06 - 20060067198 - Information recording method for recording multi-value data in optimum recording condition An information recording method that obtains optimum recording conditions for recording multi-value data m on a recording medium includes recording a test pattern in a trial writing area of the recording medium by changing a recording power Pw and an erasing power Pe consecutively while maintaining a constant ratio between ... 03/30/06 - 20060067197 - Method of recording information on optical recording medium, and information recording and reproducing apparatus An information recording method enables the precise formation of a recording mark on a recording layer having a high light transmittance such as an L1 layer of a double-layered optical recording medium. The information recording method uses the following recording strategy. A laser beam is pulse-modulated so as to create ... 01/05/06 - 20060002281 - Method and apparatus for reproducing data of super resolution information storage medium A data reproducing method reproducing data recorded in a super resolution information storage medium in a form of marks having magnitudes less than a resolving power of an incident light beam, and an apparatus thereof. The data reproducing method includes irradiating a first beam having a resolving power causing a ... 12/29/05 - 20050286390 - Recording method and optical disk device In order that it is realized to put 16× speed DVD-RAM in practice, a recording method coping with CAV (constant angular velocity) and a method for improving S/N ratio are provided and an optical disk device using them is provided. In order that a cutoff phenomenon of pulse in a ... 12/08/05 - 20050270959 - Recording method for optical recording medium, and optical recording apparatus The present invention is a recording method for optical recording medium forms a few types of amorphous mark vary from at least any one from length and area upon repeated irradiation by a recording power (Pw) light and a cooling power (Pb) light to an information layer comprising a phase-changing ... 12/01/05 - 20050265205 - Method for real-time adjustment of servo gain in an optical recording system according to reflected recording light beam An optical recording system includes an optical pickup, a power auto-control device, and a digital signal processor. The optical pickup includes a laser diode and a photo detector. The power auto-control device generates a drive voltage for driving the laser diode to generate a recording light beam incident upon an ... 11/24/05 - 20050259555 - Information recording method and apparatus with suppressed mark edge jitters Recording information is disclosed in which an information recording medium is irradiated with a recording energy beam that is power-modulated into at least a record power level and a record-ready power level lower than the record power level. The information is recorded on the recording medium in the form of ... 10/20/05 - 20050232122 - Optical disc device Provided is an optical disc device in which adjustment precision of recording laser power is improved without complication of a processing sequence during recording operation. In response to a recording start instruction, OPC is executed using an inner disc drive zone to set an initial value of recording laser power ... 10/06/05 - 20050219990 - Optical beam control device and image-forming device including the same An optical beam control device that can suppress deterioration of a laser diode and a photosensitive member is disclosed. Control is performed in such a manner that the luminous energy of emitted light is increased gradually in an initial period from the activation of a laser diode until the first ... 09/29/05 - 20050213474 - Method of determining the time of adjusting writing strategy of an optical drive A method of determining the time of adjusting writing strategy of an optical drive. Firstly, relation between an output signal value and an ambient temperature is recorded in a look up table stored in a memory. Then, the output signal value of a compensator can be obtained by looking up ... 09/15/05 - 20050201252 - Intrinsically safe pick-up for reproduction or recording devices for different optical recording media The invention relates to an intrinsically safe pick-up for reproduction or recording devices for different optical recording media, which have at least two lasers with a monitor diode which is used jointly for the lasers, such as a monitor diode which is integrated in a twin laser. The intrinsically safe ... 09/08/05 - 20050195725 - Method and apparatus for controlling write power in an optical drive A method and an apparatus which controls write power of an optical driver by optimizing the number of channels used to drive a laser diode in a write mode while stabilizing the level of a write power voltage at an early stage of the write mode. The method of controlling ... 09/08/05 - 20050195724 - Optical disk device A mark level (peak value) is obtained from an RF signal during recording and the mark level (peak value) is divided by a linear value proportional to a recording power to obtain a normalized peak value. The obtained normalized peak value is compared with a target value to adjust a ... 08/11/05 - 20050174920 - Optical head device, optical recording device, and optical recording method The present invention relates to an optical head device, an optical recording device, and an optical recording method, and an object of the present invention is to enable to acquire optimum recording characteristics of an optical recoding medium having multiple data layers, with respect to each of the multiple data ... 07/28/05 - 20050163020 - Optical disk driving unit, pickup controller, and laser driver provided in a pickup An optical disk driving unit includes a pickup configured to supply a drive current to a laser unit, and to irradiate a laser beam to an optical disk. A plurality of signal lines are configured to transmit control information of the drive current to the pickup. A pickup controller is ... 07/28/05 - 20050163019 - Apparatus for and method of controlling photo diode using digital potentiometer An optical pick up, including: a laser diode which outputs a light in response to an input current; a photo diode which receives the light and outputs a voltage; a digital potentiometer which adjusts the voltage output by the photo diode according to a voltage adjusting signal; and a controller ... 07/21/05 - 20050157625 - Optical disk device and emission current adjusting method for the same A ratio of an erase current and a peak current when starting recording is defined as K=iER/iPK (S1), and iER11 is set equal to K×iPK1, and an ideal value iER11 of an erase current that should be increased according to a temperature change is determined (S2). A value obtained by ... 07/14/05 - 20050152260 - Optical information recording apparatus for stable recording In an apparatus for recording information to an optical recording medium, a laser beam is irradiated to and reflected from the medium. A photodetector detects the light quantity of the irradiated or reflected light beam, and the detected laser beam is subjected to signal processing. Then, a sampler samples the ... 07/07/05 - 20050147015 - Optical disc write control method and optical disc recording apparatus therefor A write control method which varies a write power in response to a recording speed, a recording density, and a type of recording medium, and an optical disc recording apparatus suitable for the write control method. The write control method includes preparing a plurality of standard power values corresponding to ... 06/30/05 - 20050141395 - Method and apparatus for high-speed optical disc recording using multi chip module An optical disc recording apparatus records external data on an optical disc by using a semiconductor laser. The optical disc recording apparatus includes a circuit board. The circuit board is mounted with a power supply source and an MCM (multi chip module). The power supply source outputs at least one ... 06/30/05 - 20050141394 - Optical disk drive and information recording method An optical disk drive of the present invention has a controller, which obtains saturation levels of a first reflected laser beam obtained by a laser beam with a playback light intensity and a second reflected laser beam obtained by a laser beam with a recording light intensity, in a signal ... 06/02/05 - 20050117499 - Optical information recording and reproducing apparatus, method and computer program for determining a value of current supplied to a laser light source, and computer readable storage medium storing the program In a method of determining a value of current supplied to a laser diode, a laser light beam of predetermined power intensity is emitted continuously from a laser diode at a constant power intensity value during a predetermined period to a test area in a recording medium before performing an ... ### FreshPatents.com Support - Terms & Conditions |