Takeshi Arai
Takeshi Arai, Nishishirakawa JP
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20100327415 | SILICON EPITAXIAL WAFER AND MANUFACTURING METHOD THEREOF - Provided is a method for manufacturing a silicon epitaxial wafer by growing an epitaxial layer by placing a silicon substrate on a susceptor. The method includes at least a step of forming a silicon oxide film entirely on the rear surface of the silicon substrate; a step of removing the silicon oxide film formed at least on an edge section of the silicon substrate; and a step of placing the silicon substrate on the susceptor with the silicon oxide film in between. An epitaxial layer is grown on the silicon substrate, while holding the silicon substrate by the susceptor with the silicon oxide film in between. Thus, the silicon epitaxial wafer by which generation of particles can be reduced in a device manufacturing process and a method for manufacturing such silicon epitaxial wafer are provided. | 12-30-2010 |
Takeshi Arai, Isesaki-City JP
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20100141690 | LIGHT-EMITTING ELEMENT DRIVING CIRCUIT - A light-emitting element driving circuit comprising: an index data storage unit configured to store n-bit index data for each of a plurality of light-emitting elements included in a display device, the n-bit index data specifying a storage location of gradation data indicating brightness of a light-emitting element in the plurality of light-emitting elements: a gradation data storage unit configured to store the gradation data with m bits larger than n bits, corresponding to the index data; and a driving circuit configured to drive the light-emitting element on the basis of the gradation data corresponding to the index data so that the light-emitting element emits light at brightness according to the gradation data. | 06-10-2010 |
20100156317 | LIGHT-EMITTING ELEMENT DRIVING CIRCUIT - A light-emitting element driving circuit includes a PWM signal output circuit configured to output a plurality of PWM signals each having one logic level whose duty ratio corresponds to gradation data and each corresponding to each of a plurality of light-emitting elements, on the basis of the gradation data indicating brightness of each of the plurality of light-emitting elements. A driving signal output circuit is configured to change the duty ratio of each of the plurality of inputted PWM signals to output the plurality of changed PWM signals as a plurality of driving signals, on the basis of instruction data for changing the brightness of the plurality of light-emitting elements. A driving circuit is configured to drive the plurality of light-emitting elements on the basis of a duty ratio of each of the plurality of driving signals. | 06-24-2010 |
Takeshi Arai, Shiga JP
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20110121268 | LIGHT-EMITTING ELEMENT - The present invention relates to an organic thin-film light emitting device containing an organic compound represented by formula (1) and a donor compound. the light emitting device ca achieve both of the low-voltage driving operation and high luminance efficiency. | 05-26-2011 |
Takeshi Arai, Oizumi-Machi JP
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20110304285 | MOTOR DRIVE CIRCUIT - A motor drive circuit includes: a digital filter configured to attenuate amplitude in a frequency band including a resonance frequency of an actuator in a target current signal, the target current signal being a digital signal indicative of a target value of a drive current, the drive current being supplied to a voice coil motor configured to drive the actuator; a digital-analog converter configured to convert an output signal of the digital filter into an analog signal, and output the converted analog signal as a current control signal; and a drive circuit configured to supply the drive current to the voice coil motor according to the current control signal. | 12-15-2011 |
Takeshi Arai, Ora-Gun JP
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20120076343 | MOTOR DRIVE CIRCUIT - A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, which is a digital signal indicating a target value of a driving current to be supplied to a voice-coil motor that drives the actuator; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the motor in accordance with the current-control signal, the filter circuit including: a digital-notch filter to attenuate a frequency band around the resonance frequency in the target-current signal; and a digital-low-pass filter to attenuate a frequency band greater than or equal to a predetermined frequency in the output signal of the digital-notch filter, the digital-low-pass filter having a sampling frequency higher than a sampling frequency of the digital-notch filter. | 03-29-2012 |
Takeshi Arai, Gunma-Ken JP
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20120161687 | MOTOR DRIVE CIRCUIT - A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, the target-current signal corresponding to a digital signal indicative of a target value of a driving current; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the voice-coil motor in accordance with the current-control signal, the filter circuit including: a digital notch filter; and a digital low-pass filter, wherein either one of the digital notch filter and the digital low-pass filter configured to be inputted with the target-current signal, the other one of the digital notch filter and the digital low-pass filter configured to be inputted with an output signal of the one of the digital notch filter or the digital low-pass filter. | 06-28-2012 |
Takeshi Arai, Hyogo JP
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20140014962 | DISPLAY DEVICE AND PIXEL DEFECT CORRECTING METHOD - A display device includes a plurality of pixels formed in a matrix pattern by partition with a plurality of gate lines and a plurality of data lines. The plurality of pixels are connected to the plurality of gate lines and the plurality of data lines. At least a part of the plurality of pixels includes a transistor, a pixel electrode connected to the transistor, a common electrode arranged so as to be opposed to the pixel electrode, and a correction transistor portion. The correction transistor portion includes a gate electrode portion that is formed of a part of the common electrode and transmits visible light, a semiconductor active portion that transmits visible light, a drain electrode portion that forms a drain electrode, and a source electrode portion that forms a source electrode. | 01-16-2014 |
Takeshi Arai, Kyoto JP
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20140213107 | COAXIAL CONNECTOR - A coaxial connector that can be prevented from being detached from a coaxial cable. A coaxial connector is attached to a coaxial cable including a central conductor, an insulating body having a foam structure or a hollow structure, an outer conductor, and an insulating film. A housing includes a cylindrical part, and a holding part extending from the cylindrical part in the x-axis direction. A bushing is attached to the housing. A socket is located at the center of the cylindrical part in plan view in the z-axis direction, and is connected to the central conductor. The holding part includes a crimp portion that holds the outer conductor, and a crimp portion that holds the insulating film. The crimp portion has a protrusion at a surface which contacts the insulating film. | 07-31-2014 |
Takeshi Arai, Otsu-Shi JP
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20150084020 | LIGHT-EMITTING DEVICE MATERIAL AND LIGHT-EMITTING DEVICE - Au organic thin film light-emitting element having both high luminous efficiency and high durability can be provided using a light-emitting element material that comprises a compound having a specified carbazole skeleton. | 03-26-2015 |
20150280139 | FLUORANTHENE DERIVATIVE, LIGHT-EMITTING DEVICE MATERIAL CONTAINING SAME, AND LIGHT-EMITTING DEVICE - The purpose of the present invention is to provide an organic thin-film luminescent element which exhibits improved luminous efficiency, drive voltage and durability life. This fluoranthene derivative is characterized by having a specific structure that contains a fluoranthene skeleton. | 10-01-2015 |
Takeshi Arai, Nishishirakawa-Gun JP
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20150243566 | METHOD OF MEASURING CONTAMINATION AMOUNT OF VAPOR PHASE GROWTH APPARATUS, AND METHOD OF MANUFACTURING EPITAXIAL WAFER - Carry out a vapor etching step of cleaning an inside of a chamber of a vapor phase growth apparatus by vapor etching using HCl gas (S | 08-27-2015 |
Takeshi Arai, Kanagawa JP
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20160005819 | SEMICONDUCTOR DEVICE - Contact resistance between a SiC substrate and an electrode is decreased. When a silicide layer is analyzed by Auger Electron Spectroscopy (AES) sputter in a direction from a titanium layer side to a SiC substrate side, sputtering time corresponding to a depth profile of the silicide layer is defined as t | 01-07-2016 |