Shou, JP
Hirokazu Shou, Tokyo JP
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20080298213 | OPTICAL DISC APPARATUS AND OPTICAL DISC RECORDING AND REPRODUCTION METHOD - In an optical disc apparatus, a CPU controls a focus control circuit, and a focus offset for adjusting a height of an objective lens is set. A spindle motor control circuit, a laser driver circuit, and an RF amplifier are controlled. When an optical disc is rotated by using the set focus offset in a state where a tracking servo is not performed, an envelope of a full addition signal or a RF signal obtained from each focused focal point corresponding to the objective lens in a land and a groove is detected. An amplitude level of the envelope is measured, and a focus control circuit is controlled. By using the focus offset with which the amplitude level of the envelope of the full addition signal or the RF signal is minimized, a focus offset used when recording or reproduction of the optical disc is performed is determined. | 12-04-2008 |
20090086597 | OPTICAL DISC APPARATUS AND OPTICAL DISC RECORDING METHOD - Provided is an optical disc apparatus including: an optical pickup configured to form marks and spaces on the optical disc by using a recording power and a erasing power respectively; a control unit configured to write test data on trial on the optical disc while changing the recording power and the erasing power and to determine an optimum recording power and an optimum erasing power; and a nonvolatile memory configured to store a correction coefficient which has been obtained in advance. The control unit corrects a power ratio of a recommended recording power to a recommended erasing power by the correction coefficient stored in the memory, and controls to write the test data on trial on the optical disc while changing the recording power and a erasing power, the erasing power being acquired from the recording power and the corrected power ratio. | 04-02-2009 |
20090190620 | OPTICAL DISK DEVICE AND METHOD OF CONTROLLING LIGHT EMITTING ELEMENT - An optical disk device includes: a light emitting element which applies light to an optical disk; a light detection unit which receives the light emitted from the light emitting element and outputs an intensity signal corresponding to an intensity of the light emitting element; a difference detection unit which generates a control signal based on a difference between the intensity signal and a reference intensity signal; a first current supply unit which supplies a first current based on the control signal; a second current supply unit which supplies a second current; a current adding unit which adds the first and second currents to generate a third current and supplies the third current to the light emitting element; an optical pickup on which the first current supply unit and the adding unit are placed; and a circuit board on which the second current supply unit is placed. | 07-30-2009 |
20100039907 | OPTICAL DISK DEVICE - An optical disk device includes a first control circuit controlling a light quantity of a semiconductor laser according to a first light quantity set value corresponding to a first light quantity resolution; a second control circuit controlling the light quantity of the semiconductor laser according to a second light quantity set value corresponding to a second light quantity resolution that is smaller than the first light quantity resolution; and a drive circuit driving the semiconductor laser following the first and second control circuits. | 02-18-2010 |
Hirokazu Shou, Musashimurayama-Shi JP
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20090003185 | OPTICAL DISC APPARATUS AND OPTICAL DISC APPARATUS CONTROL METHOD - According to one embodiment, an optical disc apparatus includes a laser diode configured to irradiate a laser beam onto an optical disc, a laser drive circuit configured to supply the laser diode with a laser drive current superposed with a high frequency electric current according to defined conditions of the high frequency electric current in order to turn the laser beam output from the laser diode to a multimode laser beam, a detecting section configured to detect a frequency condition of the high frequency electric current to reduce a quantity of interlayer crosstalk, and a setting section configured to set the detected condition in the laser drive circuit. | 01-01-2009 |
20090252006 | OPTICAL DISC DEVICE AND CONTROL METHOD - According to one embodiment, an optical disc device includes a semiconductor laser which generates laser light to irradiate an optical disc, and an automatic power control circuit which detects an optical output of the semiconductor laser, sets driving current data equalized to reflect the detection result, and drives the semiconductor laser based on the driving current data. This optical disc device further includes a protection circuit which monitors the driving current data set in the automatic power control circuit to invalidate the driving current data in a case where the abnormality of the driving current data is detected. | 10-08-2009 |
Kouji Shou, Kyoto JP
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20100173257 | SHADE GUIDE, METHOD FOR DISCRIMINATING TOOTH COLORS, ARTIFICIAL TOOTH MANUFACTURING METHOD - In a shade guide, a plurality of shade tabs whose colors are mutually different are arranged regularly based on the colors. The arrangement of the plurality of shade tabs is an arrangement determined based on: S values and V values that are determined according to to which areas, from among areas partitioned by a plurality of straight lines in an L*-C* plane, the coordinates of the colors of the shade tabs belong, and H values that are determined according to to which areas, from among areas partitioned by a plurality of straight lines in an a*-b* plane, the coordinates belong. S groups, each of which is a shade tab group having a common S value, are arranged in the shade guide. V rows, each of which is a shade tab group having a common V value, are arranged in each S group. In each V row, the plurality of shade tabs have mutually different H values and are aligned in an order that is in accordance with the H values. Using this shade guide enables precisely and easily discriminating the color of an evaluation target tooth. | 07-08-2010 |
Tatsuo Shou, Aichi JP
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20100213420 | FINE PARTICLE COMPOSITE, METHOD FOR PRODUCING THE SAME, CATALYST USED FOR SOLID POLYMER FUEL CELL, AND SOLID POLYMER FUEL CELL - This invention provides a fine particle composite comprising fine particles of a sulfide or sulfide complex comprising at least one element selected from the group consisting of molybdenum (Mo), rhodium (Rh), ruthenium (Ru), and rhenium (Re) and conductive fine particles via a step of preparing a solvent mixture from a compound containing conductive carbon powder, at least one compound containing an element selected from among molybdenum (Mo), rhodium (Rh), ruthenium (R), and rhenium (Re), and sulfur (S) and a step of conducting a hydrothermal or solvothermal reaction at a pressure and temperature that convert the solvent mixture into a supercritical or subcritical water or solvent. | 08-26-2010 |
20100316559 | SINGLE-CRYSTAL FINE POWDER OF SULFIDE OR SULFIDE COMPLEX AND METHOD FOR PREPARING THE SAME - This invention provides a fine particle composite comprising fine powder of a sulfide or sulfide complex comprising a given element. The fine particle composite is obtained by a method for producing a fine particle composite comprising fine powder of a sulfide or sulfide complex comprising at least one element selected from the group consisting of molybdenum (Mo), rhodium (Rh), ruthenium (Ru), and rhenium (Re). Such method comprises steps of: preparing a solvent mixture from at least one compound containing an element selected from among molybdenum (Mo), rhodium (Rh), ruthenium (Ru), rhenium (Re), and sulfur (S); and subjecting the solvent mixture to a hydrothermal or solvothermal reaction. The resulting fine particle composite comprises fine particles of a sulfide or sulfide complex comprising at least one element selected from the group consisting of molybdenum (Mo), rhodium (Rh), ruthenium (Ru), and rhenium (Re). | 12-16-2010 |
Toshiyuki Shou, Kawasaki JP
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20100102420 | SEMICONDUCTOR DEVICE AND METHOD FOR MANUFACTURING THE SAME - To provide a semiconductor device in which an interval between first wells can be shortened by improving a separation breakdown voltage between the first wells and a method for manufacturing the same. A semiconductor device includes a first conductivity type semiconductor substrate | 04-29-2010 |