Patents by Inventor Tomohisa Sato
Tomohisa Sato 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: 9530938Abstract: A semiconductor light-emitting device having an electrode that can be manufactured by a simple method and is unlikely to deteriorate, and a method for forming the electrode are provided. The semiconductor light-emitting device according to the present invention has a semiconductor layered structure having a light-emitting layer that emits light by supplying electric power and an electrode formed on the semiconductor layered structure. The electrode has a reflection layer that reflects light exiting from the light-emitting layer, a barrier layer formed on the upper side and side surface of the reflection layer, and a pad layer formed only on the top surface of the barrier layer.Type: GrantFiled: January 6, 2016Date of Patent: December 27, 2016Assignee: Sharp Kabushiki KaishaInventors: Tomohisa Sato, Jun Mori
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Publication number: 20160118544Abstract: A semiconductor light-emitting device having an electrode that can be manufactured by a simple method and is unlikely to deteriorate, and a method for forming the electrode are provided. The semiconductor light-emitting device according to the present invention has a semiconductor layered structure having a light-emitting layer that emits light by supplying electric power and an electrode formed on the semiconductor layered structure. The electrode has a reflection layer that reflects light exiting from the light-emitting layer, a barrier layer formed on the upper side and side surface of the reflection layer, and a pad layer formed only on the top surface of the barrier layer.Type: ApplicationFiled: January 6, 2016Publication date: April 28, 2016Applicant: Sharp Kabushiki KaishaInventors: Tomohisa SATO, Jun MORI
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Patent number: 9263644Abstract: A semiconductor light-emitting device having an electrode that can be manufactured by a simple method and is unlikely to deteriorate, and a method for forming the electrode are provided. The semiconductor light-emitting device according to the present invention has a semiconductor layered structure having a light-emitting layer that emits light by supplying electric power and an electrode formed on the semiconductor layered structure. The electrode has a reflection layer that reflects light exiting from the light-emitting layer, a barrier layer formed on the upper side and side surface of the reflection layer, and a pad layer formed only on the top surface of the barrier layer.Type: GrantFiled: June 19, 2015Date of Patent: February 16, 2016Assignee: SHARP KABUSHIKI KAISHAInventors: Tomohisa Sato, Jun Mori
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Publication number: 20150287887Abstract: A semiconductor light-emitting device having an electrode that can be manufactured by a simple method and is unlikely to deteriorate, and a method for forming the electrode are provided. The semiconductor light-emitting device according to the present invention has a semiconductor layered structure having a light-emitting layer that emits light by supplying electric power and an electrode formed on the semiconductor layered structure. The electrode has a reflection layer that reflects light exiting from the light-emitting layer, a barrier layer formed on the upper side and side surface of the reflection layer, and a pad layer formed only on the top surface of the barrier layer.Type: ApplicationFiled: June 19, 2015Publication date: October 8, 2015Applicant: Sharp Kabushiki KaishaInventors: Tomohisa SATO, Jun MORI
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Patent number: 9065018Abstract: A semiconductor light-emitting device having an electrode that can be manufactured by a simple method and is unlikely to deteriorate, and a method for forming the electrode are provided. The semiconductor light-emitting device according to the present invention has a semiconductor layered structure having a light-emitting layer that emits light by supplying electric power and an electrode formed on the semiconductor layered structure. The electrode has a reflection layer that reflects light exiting from the light-emitting layer, a barrier layer formed on the upper side and side surface of the reflection layer, and a pad layer formed only on the top surface of the barrier layer.Type: GrantFiled: January 11, 2013Date of Patent: June 23, 2015Assignee: Sharp Kabushiki KaishaInventors: Tomohisa Sato, Jun Mori
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Patent number: 8362786Abstract: The degradation of an electrical storage device 30 such as a capacitor can be determined by a system which is not an external device but is installed in hybrid construction equipment 1 in a state that the electrical storage device 30 such as a capacitor is mounted. To achieve this objective, it is at least checked that the working machine has stopped. Next, when it has been checked that the working machine has stopped, a degradation state determination time control mode is entered, a motor-generator is driven at the prescribed rotational speed and the prescribed torque, and the electrical storage device rises from the prescribed start charging voltage to the prescribed end charging voltage (Step 102).Type: GrantFiled: March 16, 2009Date of Patent: January 29, 2013Assignee: Komatsu Ltd.Inventors: Jun Yamane, Takayoshi Endou, Tomohisa Sato
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Patent number: 8289743Abstract: A voltage control device and a voltage control method capable of improving efficiency of a system as a whole even when fluctuation in voltage of a capacitor, which is a storage battery, is large are provided.Type: GrantFiled: February 14, 2008Date of Patent: October 16, 2012Assignee: Komatsu Ltd.Inventor: Tomohisa Sato
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Patent number: 8098039Abstract: The present invention provides a generator motor driving device that can promptly perform discharging of charges from the capacitor during a maintenance operation, and a capacitor discharge method to be implemented in the generator motor driving device. Power is supplied from the capacitor to the generator motor being driven by the engine, and the generator motor is driven, with the engine as a load. Rated constant current control is performed on the generator motor, and rated constant voltage control is performed on the booster, until the capacitor voltage decreases to a first voltage. After the capacitor voltage decreases to the first voltage, the rated constant current control is performed on the generator motor, and voltage control is performed on the booster to maintain a predetermined ratio between the capacitor voltage and the booster output voltage to be output to the driver, until the capacitor voltage decreases to a second voltage that is lower than the first voltage.Type: GrantFiled: March 13, 2008Date of Patent: January 17, 2012Assignee: Komatsu Ltd.Inventors: Takayoshi Endo, Tomohisa Sato
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Patent number: 8096377Abstract: In order to securely prevent, even where a boosting unit is provided, a rush current from arising when a contactor is turned on during a transient state, the voltage of a surge absorbing condenser is controlled so that the voltage difference between the power source capacitor and surge absorbing condenser falls in a predetermined range. The control is performed in the following manner: of the two voltage source inverters of the AC-coupled bi-directional DC-DC converter composing a voltage converter as a boosting unit, only the one that is not connected in parallel with a power source capacitor is activated to perform a chopping operation while the generator is operated with the contactor off.Type: GrantFiled: February 14, 2008Date of Patent: January 17, 2012Assignee: Komatsu Ltd.Inventor: Tomohisa Sato
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Publication number: 20110018551Abstract: The degradation of an electrical storage device 30 such as a capacitor can be determined by a system which is not an external device but is installed in hybrid construction equipment 1 in a state that the electrical storage device 30 such as a capacitor is mounted. To achieve this objective, it is at least checked that the working machine has stopped. Next, when it has been checked that the working machine has stopped, a degradation state determination time control mode is entered, a motor-generator is driven at the prescribed rotational speed and the prescribed torque, and the electrical storage device rises from the prescribed start charging voltage to the prescribed end charging voltage (Step 102).Type: ApplicationFiled: March 16, 2009Publication date: January 27, 2011Applicant: KOMATSU LTD.Inventors: Jun Yamane, Takayoshi Endou, Tomohisa Sato
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Publication number: 20100090628Abstract: The present invention provides a generator motor driving device that can promptly perform discharging of charges from the capacitor during a maintenance operation, and a capacitor discharge method to be implemented in the generator motor driving device. Power is supplied from the capacitor to the generator motor being driven by the engine, and the generator motor is driven, with the engine as a load. Rated constant current control is performed on the generator motor, and rated constant voltage control is performed on the booster, until the capacitor voltage decreases to a first voltage. After the capacitor voltage decreases to the first voltage, the rated constant current control is performed on the generator motor, and voltage control is performed on the booster to maintain a predetermined ratio between the capacitor voltage and the booster output voltage to be output to the driver, until the capacitor voltage decreases to a second voltage that is lower than the first voltage.Type: ApplicationFiled: March 13, 2008Publication date: April 15, 2010Applicant: Komatsu Ltd.Inventors: Takayoshi Endo, Tomohisa Sato
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Publication number: 20100014323Abstract: A voltage control device and a voltage control method capable of improving efficiency of a system as a whole even when fluctuation in voltage of a capacitor, which is a storage battery, is large are provided.Type: ApplicationFiled: February 14, 2008Publication date: January 21, 2010Applicant: KOMATSU LTD.Inventor: Tomohisa Sato
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Publication number: 20090308675Abstract: In order to securely prevent, even where a boosting unit is provided, a rush current from arising when a contactor is turned on during a transient state, the voltage of a surge absorbing condenser is controlled so that the voltage difference between the power source capacitor and surge absorbing condenser falls in a predetermined range. The control is performed in the following manner: of the two voltage source inverters of the AC-coupled bi-directional DC-DC converter composing a voltage converter as a boosting unit, only the one that is not connected in parallel with a power source capacitor is activated to perform a chopping operation while the generator is operated with the contactor off.Type: ApplicationFiled: February 14, 2008Publication date: December 17, 2009Applicant: Komatsu Ltd.Inventor: Tomohisa Sato
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Publication number: 20060257997Abstract: To develop system technology for a high throughput in vitro synthesis reaction method for biopolymers such as proteins, RNA, and the like.Type: ApplicationFiled: April 23, 2004Publication date: November 16, 2006Applicant: CellFree Sciences Co., Ltd.Inventors: Yaeta Endo, Tatsuya Sawasaki, Tomio Ogasawara, Riyo Morishita, Mihoro Saeki, Tomohisa Sato, Aya Kitamoto
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Patent number: 6148909Abstract: A temperature control system which performs control of an object whose temperature is to be controlled as accurately as possible. The system comprises: a chiller located in a fluid circulating and supplying system, for cooling a thermal fluid returning from a vacuum chamber, a first flow control valve located in the fluid circulating and supplying system in a position between the chiller and the vacuum chamber, a bypass passage for splitting and supplying thermal fluid returning from the vacuum chamber to a position between the first flow control valve and the vacuum chamber, before it reaches the chiller, a second flow control valve located in the bypass passage, and a halogen lamp heater located in the fluid circulating and supplying system in a position between a confluence point of the bypass passage and the vacuum chamber, for adjusting the temperature of the thermal fluid passing therethrough to a set temperature.Type: GrantFiled: January 25, 1999Date of Patent: November 21, 2000Assignee: Komatsu Ltd.Inventors: Masashi Osanai, Shunsuke Miyamoto, Tomohisa Sato, Hiroaki Takechi, Tsutomu Hatanaka, Norio Takahashi, Toshiyuki Kamei, Takumi Sugihara, Isao Shibata, Hironori Akiba