Patents by Inventor Keisuke Uno
Keisuke Uno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8508396Abstract: It is possible to reduce a noise component mixed in an analog signal while suppressing increase of power consumption. An amplification unit amplifies the inputted analog signal and converts the amplified signal into a digital signal of a predetermined format for output. The amplification unit includes: an analog circuit unit for processing an analog signal; and a digital circuit unit for processing a digital signal; wherein the circuits are arranged on a substrate. The analog circuit unit includes: an amplification circuit for amplifying the inputted analog signal; and an LPF for cutting off a high frequency component of the amplified analog signal. The digital circuit unit includes: a rectification circuit which rectifies a waveform of the signal whose high-frequency component is cut off; and digital output circuit which converts the waveform-rectified signal into a digital signal of a predetermined format for output.Type: GrantFiled: February 20, 2009Date of Patent: August 13, 2013Assignee: OMRON CorporationInventors: Akira Enami, Keisuke Uno, Hayami Hosokawa, Kentaro Hamana, Tetsuya Nosaka
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Patent number: 8463129Abstract: A light transmission module includes an optical converter for converting an electrical signal to an optical signal; a light transmission path for transmitting the optical signal converted by the optical converter; an electrical transmission path for transmitting an input electrical signal; and a control instructing unit for instructing stop of drive to the optical converter based on a detection of an input electrical signal. When an input electrical signal having a predetermined frequency is detected, the input electrical signal having the predetermined frequency is converted to an optical signal and transmitted in the light transmission path. When input of an electrical signal other than the predetermined frequency is detected, the electrical signal other than the predetermined frequency is transmitted by the electrical transmission path without being converted to an optical signal due to the stop of the drive of the optical converter.Type: GrantFiled: April 3, 2008Date of Patent: June 11, 2013Assignee: OMRON CorporationInventors: Yoshihisa Ishida, Keisuke Uno, Akira Enami, Katsuhiko Kato, Hayami Hosokawa
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Patent number: 8457499Abstract: A semiconductor laser drive apparatus comprises a bias current setting section (232) which sets a bias current value on the basis of the drive temperature so that the temperature characteristic of the bias current value with respect to the drive temperature may be a linear function having a slope except zero and a drive current setting section (233) for setting the drive current value on the basis of the drive temperature so that the temperature characteristic of the drive current value with respect to the drive temperature may be a function having a slope except zero. The temperature characteristic of the bias current and that of the drive current are functions different from each other. With this, low cost, space-saving, and power-saving of a semiconductor laser are achieved, and a semiconductor laser drive apparatus enabling a good transmission characteristic on the reception side and a high optical output over the whole drive temperature range when driving the semiconductor laser can be provided.Type: GrantFiled: August 8, 2008Date of Patent: June 4, 2013Assignee: OMRON CorporationInventors: Kentaro Hamana, Akira Enami, Yukari Terakawa, Keisuke Uno, Hayami Hosokawa
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Patent number: 8391722Abstract: A transmission device has a light emitting element for converting an electric signal to an optical signal and transmitting the same, and a drive section for outputting the optical signal from the light emitting element and driving the light emitting element by providing the electric signal to the light emitting element. The electric signal provided by the drive section to the light emitting element is a waveform deformed signal having a waveform in which a time required for a fall is longer than a time required for a rise in a binary signal having a signal of high level and a signal of low level.Type: GrantFiled: August 27, 2008Date of Patent: March 5, 2013Assignee: OMRON CorporationInventors: Akira Enami, Keisuke Uno, Kentaro Hamana, Tetsuya Nosaka, Hayami Hosokawa
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Patent number: 8380062Abstract: A light transmission module has a light transmitting unit having a light emitting portion for outputting an optical signal corresponding to a data signal input as an electrical signal, and a first power supply controller for controlling a drive power supply of the light emitting portion, a light transmission path for transmitting the optical signal introduced from the light transmitting unit, a light receiving unit having a light receiving portion for receiving the optical signal output from the light transmission path and outputting an electrical signal corresponding to the optical signal, and a second power supply controller for controlling a drive power supply of the light receiving portion, and at least one electrical transmission path, connecting the light transmitting unit and the light receiving unit, for transmitting a control signal for controlling power supply to the light emitting portion and the light receiving portion to the first power supply controller and the second power supply controller.Type: GrantFiled: April 3, 2008Date of Patent: February 19, 2013Assignee: OMRON CorporationInventors: Keisuke Uno, Yoshihisa Ishida, Akira Enami, Hayami Hosokawa
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Publication number: 20120134681Abstract: A semiconductor laser drive apparatus comprises a bias current setting section (232) which sets a bias current value on the basis of the drive temperature so that the temperature characteristic of the bias current value with respect to the drive temperature may be a linear function having a slope except zero and a drive current setting section (233) for setting the drive current value on the basis of the drive temperature so that the temperature characteristic of the drive current value with respect to the drive temperature may be a function having a slope except zero. The temperature characteristic of the bias current and that of the drive current are functions different from each other. With this, low cost, space-saving, and power-saving of a semiconductor laser are achieved, and a semiconductor laser drive apparatus enabling a good transmission characteristic on the reception side and a high optical output over the whole drive temperature range when driving the semiconductor laser can be provided.Type: ApplicationFiled: August 8, 2008Publication date: May 31, 2012Applicant: OMRON CORPORATIONInventors: Kentaro Hamana, Akira Enami, Yukari Terakawa, Keisuke Uno, Hayami Hosokawa
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Publication number: 20110176586Abstract: It is possible to reduce a noise component mixed in an analog signal while suppressing increase of power consumption. An amplification unit amplifies the inputted analog signal and converts the amplified signal into a digital signal of a predetermined format for output. The amplification unit includes: an analog circuit unit for processing an analog signal; and a digital circuit unit for processing a digital signal; wherein the circuits are arranged on a substrate. The analog circuit unit includes: an amplification circuit for amplifying the inputted analog signal; and an LPF for cutting off a high frequency component of the amplified analog signal. The digital circuit unit includes: a rectification circuit which rectifies a waveform of the signal whose high-frequency component is cut off; and digital output circuit which converts the waveform-rectified signal into a digital signal of a predetermined format for output.Type: ApplicationFiled: February 20, 2009Publication date: July 21, 2011Applicant: OMRON CORPORATIONInventors: Akira Enami, Keisuke Uno, Hayami Hosokawa, Kentaro Hamana, Tetsuya Nosaka
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Publication number: 20110135311Abstract: A transmission device has a light emitting element for converting an electric signal to an optical signal and transmitting the same, and a drive section for outputting the optical signal from the light emitting element and driving the light emitting element by providing the electric signal to the light emitting element. The electric signal provided by the drive section to the light emitting element is a waveform deformed signal having a waveform in which a time required for a fall is longer than a time required for a rise in a binary signal having a signal of high level and a signal of low level.Type: ApplicationFiled: August 27, 2008Publication date: June 9, 2011Applicant: OMRON CORPORATIONInventors: Akira Enami, Keisuke Uno, Kentaro Hamana, Tetsuya Nosaka, Hayami Hosokawa
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Publication number: 20100124422Abstract: A light transmission module includes an optical converter for converting an electrical signal to an optical signal; a light transmission path for transmitting the optical signal converted by the optical converter; an electrical transmission path for transmitting an input electrical signal; and a control instructing unit for instructing stop of drive to the optical converter based on a detection of an input electrical signal. When an input electrical signal having a predetermined frequency is detected, the input electrical signal having the predetermined frequency is converted to an optical signal and transmitted in the light transmission path. When input of an electrical signal other than the predetermined frequency is detected, the electrical signal other than the predetermined frequency is transmitted by the electrical transmission path without being converted to an optical signal due to the stop of the drive of the optical converter.Type: ApplicationFiled: April 3, 2008Publication date: May 20, 2010Applicant: OMRON CORPORATIONInventors: Yoshihisa Ishida, Keisuke Uno, Akira Enami, Katsuhiko Kato, Hayami Hosokawa
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Publication number: 20100119236Abstract: A light transmission module has a light transmitting unit having a light emitting portion for outputting an optical signal corresponding to a data signal input as an electrical signal, and a first power supply controller for controlling a drive power supply of the light emitting portion, a light transmission path for transmitting the optical signal introduced from the light transmitting unit, a light receiving unit having a light receiving portion for receiving the optical signal output from the light transmission path and outputting an electrical signal corresponding to the optical signal, and a second power supply controller for controlling a drive power supply of the light receiving portion, and at least one electrical transmission path, connecting the light transmitting unit and the light receiving unit, for transmitting a control signal for controlling power supply to the light emitting portion and the light receiving portion to the first power supply controller and the second power supply controller.Type: ApplicationFiled: April 3, 2008Publication date: May 13, 2010Applicant: OMRON CORPORATIONInventors: Keisuke Uno, Yoshihisa Ishida, Akira Enami, Hayami Hosokawa
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Publication number: 20100046956Abstract: A light transmission system includes a core for transmitting a clock signal as an optical signal, a core for transmitting a data signal or a control signal as the optical signal in a first direction, which is a direction same as a transmission direction of the clock signal, and a core for transmitting the data signal or the control signal as the optical signal in a second direction, which is an opposite direction to the transmission direction of the clock signal are arranged, thereby bi-directionally transmitting the data signal or the control signal.Type: ApplicationFiled: March 13, 2008Publication date: February 25, 2010Applicant: OMRON CORPORATIONInventors: Keisuke Uno, Hayami Hosokawa, Yoshihisa Ishida, Akira Enami
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Patent number: 7161273Abstract: A fixed voltage and a movable electrode are placed face to face with each other, and an insulating film is formed on the surface of the fixed electrode. The insulating film is made of a nitride film (SiN) as a main material, with oxide films (SiO2) being formed on the front and rear surfaces of the nitride film. Moreover, a plurality of protrusions are formed on an area facing the movable electrode of the upper face of the insulating film. The charge quantity in the insulating film is mainly determined by a film thickness of the oxide film, and the nitride film is used for maintaining a sufficient film thickness required for the voltage proof characteristic.Type: GrantFiled: November 4, 2002Date of Patent: January 9, 2007Assignee: Omron CorporationInventors: Akira Akiba, Keisuke Uno, Masao Jojima, Tomonori Seki, Koji Sano
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Publication number: 20030102771Abstract: A fixed voltage and a movable electrode are placed face to face with each other, and an insulating film is formed on the surface of the fixed electrode. The insulating film is made of a nitride film (SiN) as a main material, with oxide films (SiO2) being formed on the front and rear surfaces of the nitride film. Moreover, a plurality of protrusions are formed on an area facing the movable electrode of the upper face of the insulating film. The charge quantity in the insulating film is mainly determined by a film thickness of the oxide film, and the nitride film is used for maintaining a sufficient film thickness required for the voltage proof characteristic.Type: ApplicationFiled: November 4, 2002Publication date: June 5, 2003Inventors: Akira Akiba, Keisuke Uno, Masao Jojima, Tomonori Seki, Koji Sano