Patents by Inventor Kiyoshi Koyama
Kiyoshi Koyama 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: 11963374Abstract: An object is to provide a semiconductor device with a novel structure. The semiconductor device includes a first wiring; a second wiring; a third wiring; a fourth wiring; a first transistor having a first gate electrode, a first source electrode, and a first drain electrode; and a second transistor having a second gate electrode, a second source electrode, and a second drain electrode. The first transistor is provided in a substrate including a semiconductor material. The second transistor includes an oxide semiconductor layer.Type: GrantFiled: January 24, 2022Date of Patent: April 16, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Kiyoshi Kato
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Publication number: 20240102673Abstract: A humidifier includes a housing, a humidifying rotor, and an irradiator. The housing is formed with an air passage through which air passes and a water storage tank configured to store water. The humidifying rotor extends over the air passage and the water storage tank. The humidifying rotor rotates so that a portion of the humidifying rotor having absorbed moisture from the water storage tank moves to the air passage and releases the moisture. The irradiator irradiates part of the humidifying rotor with ultraviolet light.Type: ApplicationFiled: December 1, 2023Publication date: March 28, 2024Inventors: Chika KOYAMA, Tomoki SAITO, Toshio TANAKA, Mamoru OKUMOTO, Kiyoshi KUROI
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Publication number: 20240093891Abstract: An ultraviolet ray radiation apparatus includes a light emitter, a light receiver, and a protector. The light emitter emits ultraviolet light. The light receiver outputs a signal varying with an amount of light received. The protector protects the light receiver from ultraviolet light.Type: ApplicationFiled: November 27, 2023Publication date: March 21, 2024Inventors: Tomoki SAITO, Kiyoshi KUROI, Toshio TANAKA, Chika KOYAMA, Mamoru OKUMOTO
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Publication number: 20240094671Abstract: An image forming apparatus includes a fixing device to heat a recording material at a use position, an opening and closing member, and a drawer unit. In a state where the fixing device is at the use position, part of the fixing device is located in a space for the drawer unit to pass through when moved from a first inner position to a first outer position so that movement of the drawer unit from the first inner to the first outer position is restricted. The fixing device is retracted from the use position to a retracted position so that the movement of the drawer unit from the first inner to the first outer position is allowed. Part of the fixing device at the retracted position is at a position higher than a position of an upper cover portion of the opening and closing member at a closed position.Type: ApplicationFiled: September 11, 2023Publication date: March 21, 2024Inventors: CHIKARA IMAIZUMI, SATOSHI MURASAKI, KIYOSHI FURUTA, SHINYA NODA, KUNIHIRO NIWA, YOJI MISAO, TOMOOKU KOYAMA, TOMOKI KATAFUCHI, TOMONARI INOUE, KOICHI SEKIMIZU
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Publication number: 20240093887Abstract: An air-conditioning apparatus includes an irradiation device including an LED configured to emit an ultraviolet ray; and includes a heat-dissipating unit configured to dissipate heat of the irradiation device into air.Type: ApplicationFiled: November 28, 2023Publication date: March 21, 2024Applicant: DAIKIN INDUSTRIES, LTD.Inventors: Tomoki SAITO, Kiyoshi KUROI, Toshio TANAKA, Chika KOYAMA, Mamoru OKUMOTO
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Publication number: 20240085825Abstract: An image forming apparatus to form an image on a recording material includes an apparatus main body having a first end provided with an opening and having a second end, a fixing device to heat the recording material, an opening and closing member, a drawer unit having a first photosensitive drum, and a transfer device. When being moved from a first inner position inside the apparatus main body to a first outer position outside the apparatus main body through the main body opening, the drawer unit is to be moved in a moving direction intersecting with a rotation axis of the first photosensitive drum, and is to be moved away from the second end. When being moved from a second inner position inside the apparatus main body to a second outer position outside the apparatus main body, the transfer device is moved away from the second end.Type: ApplicationFiled: September 12, 2023Publication date: March 14, 2024Inventors: CHIKARA IMAIZUMI, SATOSHI MURASAKI, KIYOSHI FURUTA, SHINYA NODA, KUNIHIRO NIWA, YOJI MISAO, TOMOOKU KOYAMA, TOMOKI KATAFUCHI, TOMONARI INOUE, KOICHI SEKIMIZU
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Publication number: 20240085849Abstract: An image forming apparatus includes an apparatus main body, a drawer unit, and a transfer device including a belt. The drawer unit includes a first cartridge, a support member to which the first cartridge is detachably attached, and a first photosensitive drum disposed on the support member or the first cartridge. The drawer unit is moved to a first inner position inside the apparatus main body and to a first outer position outside the apparatus main body. The transfer device is moved to a second inner position inside the apparatus main body and to a second outer position outside the apparatus main body. The belt contacts the first photosensitive drum with the transfer device at the second inner position. The transfer device is moved from the second inner to the second outer position when the drawer unit is moved from the first inner to the first outer position.Type: ApplicationFiled: September 12, 2023Publication date: March 14, 2024Inventors: CHIKARA IMAIZUMI, SATOSHI MURASAKI, KIYOSHI FURUTA, SHINYA NODA, KUNIHIRO NIWA, YOJI MISAO, TOMOOKU KOYAMA, TOMOKI KATAFUCHI, TOMONARI INOUE, KOICHI SEKIMIZU
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Publication number: 20240085824Abstract: An image forming apparatus includes an apparatus main body, a drawer unit, and a transfer device a including a belt. When image formation on a recording material is performed, the drawer unit is at a first apparatus main body inner position and the transfer device is at a second apparatus main body inner position. In this drawer unit state, (a) a part of the transfer device is disposed downstream of the drawer unit in a moving direction in which the drawer unit moves from the first inner position to a first apparatus main body outer position, and (b) in a vertical direction, an area where the part of the transfer device is positioned overlaps, at least in part, with an area where the drawer unit is positioned. The transfer device includes a cleaning member to clean the belt and is accommodated in the part of the transfer device.Type: ApplicationFiled: September 12, 2023Publication date: March 14, 2024Inventors: CHIKARA IMAIZUMI, SATOSHI MURASAKI, KIYOSHI FURUTA, SHINYA NODA, KUNIHIRO NIWA, YOJI MISAO, TOMOOKU KOYAMA, TOMOKI KATAFUCHI, TOMONARI INOUE, KOICHI SEKIMIZU
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Patent number: 11917838Abstract: An object is to provide a semiconductor device with a novel structure. The semiconductor device includes a first wiring; a second wiring; a third wiring; a fourth wiring; a first transistor having a first gate electrode, a first source electrode, and a first drain electrode; and a second transistor having a second gate electrode, a second source electrode, and a second drain electrode. The first transistor is provided in a substrate including a semiconductor material. The second transistor includes an oxide semiconductor layer.Type: GrantFiled: January 24, 2022Date of Patent: February 27, 2024Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Kiyoshi Kato
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Patent number: 10587142Abstract: A charge control device includes a switching regulator that charges a capacitor with electricity supplied from a power supply. The charge control device is characterized in that feedback unit that feedback-inputs a predetermined control amount to the switching regulator is provided, and the switching regulator includes a control unit that controls a charge current supplied to the capacitor in accordance with the control amount feedback-input from the feedback unit.Type: GrantFiled: March 12, 2018Date of Patent: March 10, 2020Assignee: DENSO TEN LimitedInventor: Kiyoshi Koyama
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Publication number: 20180351384Abstract: A charge control device includes a switching regulator that charges a capacitor with electricity supplied from a power supply. The charge control device is characterized in that feedback unit that feedback-inputs a predetermined control amount to the switching regulator is provided, and the switching regulator includes a control unit that controls a charge current supplied to the capacitor in accordance with the control amount feedback-input from the feedback unit.Type: ApplicationFiled: March 12, 2018Publication date: December 6, 2018Applicant: DENSO TEN LimitedInventor: Kiyoshi KOYAMA
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Patent number: 9543834Abstract: There is provided a switching regulator configured to convert an input voltage into an output voltage. A control unit is configured to perform switching control in response to a result of comparison between a reference voltage and a complex voltage which includes a feedback voltage acquired by feeding back the output voltage, and a derived voltage derived on the basis of an input current.Type: GrantFiled: April 21, 2014Date of Patent: January 10, 2017Assignee: FUJITSU TEN LIMITEDInventors: Ryoh Izumoto, Kiyoshi Koyama
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Patent number: 9496784Abstract: There is provided a switching regulator configured to convert an input voltage into an output voltage. A control unit is configured to perform switching control in response to a result of comparison between a reference voltage and a complex voltage which includes a feedback voltage acquired by feeding back the output voltage, and a derived voltage derived on the basis of an input current.Type: GrantFiled: April 21, 2014Date of Patent: November 15, 2016Assignee: FUJITSU TEN LIMITEDInventors: Ryoh Izumoto, Kiyoshi Koyama
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Patent number: 9362770Abstract: A device control apparatus according to an embodiment includes a monitoring unit, a first processing unit, and a second processing unit. The monitoring unit monitors a state of voltage supply from a battery. When the start of the voltage supply is detected, the first processing unit starts the voltage supply to some devices, operates in a first operation mode, and executes a resume process of the devices. When the resume process is completed, the second processing unit starts the voltage supply to devices other than some devices, initializes states of the devices, and operates in a second operation mode in which consumption power is larger than consumption power of the first operation mode.Type: GrantFiled: January 27, 2014Date of Patent: June 7, 2016Assignee: FUJITSU TEN LIMITEDInventors: Kenji Tada, Kenji Furukawa, Tohru Mikamo, Toshihito Sawai, Hideshi Nishizawa, Takashi Mizushima, Satoru Nakae, Kiyoshi Koyama, Ryoh Izumoto, Mitsuru Hanada
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Publication number: 20140320098Abstract: There is provided a switching regulator configured to convert an input voltage into an output voltage. A control unit is configured to perform switching control in response to a result of comparison between a reference voltage and a complex voltage which includes a feedback voltage acquired by feeding back the output voltage, and a derived voltage derived on the basis of an input current.Type: ApplicationFiled: April 21, 2014Publication date: October 30, 2014Applicant: FUJITSU TEN LIMITEDInventors: Ryoh IZUMOTO, Kiyoshi KOYAMA
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Publication number: 20140210421Abstract: A device control apparatus according to an embodiment includes a monitoring unit, a first processing unit, and a second processing unit. The monitoring unit monitors a state of voltage supply from a battery. When the start of the voltage supply is detected, the first processing unit starts the voltage supply to some devices, operates in a first operation mode, and executes a resume process of the devices. When the resume process is completed, the second processing unit starts the voltage supply to devices other than some devices, initializes states of the devices, and operates in a second operation mode in which consumption power is larger than consumption power of the first operation mode.Type: ApplicationFiled: January 27, 2014Publication date: July 31, 2014Applicant: FUJITSU TEN LIMITEDInventors: Kenji TADA, Kenji FURUKAWA, Tohru MIKAMO, Toshihito SAWAI, Hideshi NISHIZAWA, Takashi MIZUSHIMA, Satoru NAKAE, Kiyoshi KOYAMA, Ryoh IZUMOTO, Mitsuru HANADA
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Patent number: 6601773Abstract: A heat pump type hot water supply apparatus (10) for heating water by refrigerant heat and stocking the hot water thus achieved including: a heat pump unit (11) having a refrigerant circuit using natural refrigerant, the refrigerant circuit including a compressor (16) for compressing refrigerant, a heat-pump heat exchanger (18) and a refrigerant-water heat exchanger (27) for performing the heat exchange between refrigerant and water to achieve hot water; a hot water supply unit (12) including a hot water supply tank (26) for stocking the hot water achieved by the refrigerant-water heat exchanger (27) of the heat pump unit (11) and supplying the hot water thus stocked; and a water pipe (36) through which the refrigerant-water heat exchanger (27) of the heat pump unit (11) and the hot water supply tank (26) of the hot water supply unit (12) are connected to each other to circulate hot-water/water between the refrigerant-water heat exchanger (27) and said hot water supply tank (26).Type: GrantFiled: February 14, 2002Date of Patent: August 5, 2003Assignees: Sanyo Electric Co., Ltd., Sanyo Electric Air ConditioningInventors: Masanobu Saitoh, Kiyoshi Koyama, Yoshinori Touya, Sadahiro Takizawa, Kazuaki Shikichi, Shigeya Ishigaki, Hirokazu Izaki, Hiroshi Mukaiyama, Osamu Kuwabara, Haruhisa Yamasaki, Satoshi Imai
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Publication number: 20020113133Abstract: A heat pump type hot water supply apparatus (10) for heating water by refrigerant heat and stocking the hot water thus achieved including: a heat pump unit (11) having a refrigerant circuit using natural refrigerant, the refrigerant circuit including a compressor (16) for compressing refrigerant, a heat-pump heat exchanger (18) and a refrigerant-water heat exchanger (27) for performing the heat exchange between refrigerant and water to achieve hot water; a hot water supply unit (12) including a hot water supply tank (26) for stocking the hot water achieved by the refrigerant-water heat exchanger (27) of the heat pump unit (11) and supplying the hot water thus stocked; and a water pipe (36) through which the refrigerant-water heat exchanger (27) of the heat pump unit (11) and the hot water supply tank (26) of the hot water supply unit (12) are connected to each other to circulate hot-water/water between the refrigerant-water heat exchanger (27) and said hot water supply tank (26).Type: ApplicationFiled: February 14, 2002Publication date: August 22, 2002Applicant: SANYO ELECTRIC CO., LTD.Inventors: Masanobu Saitoh, Kiyoshi Koyama, Yoshinori Touya, Sadahiro Takizawa, Kazuaki Shikichi, Shigeya Ishigaki, Hirokazu Izaki, Hiroshi Mukaiyama, Osamu Kuwabara, Haruhisa Yamasaki, Satoshi Imai
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Patent number: 6158954Abstract: A number of vanes 12 are disposed in a peripheral direction of a plurality of supporting disks disposed along a rotary shaft 14 at given intervals. Each vane 12 is disposed at an angular interval as determined by a logistic representation. Thereby the intensity and variations of noise levels at around 8N on the low-frequency side, as well as the noise level caused by rotary first-order sounds, can be reduced.Type: GrantFiled: March 26, 1999Date of Patent: December 12, 2000Assignee: Sanyo Electric Co., Ltd.Inventors: Noriyuki Nabeshima, Tomohito Takada, Michihiro Kurokawa, Tomohito Koizumi, Yoshinori Toya, Kiyoshi Koyama, Shigeya Ishigaki
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Patent number: 6030108Abstract: The light transmission hose included in the waterproof lighting apparatus according to the present invention is of a watertight structure, so it can easily be used as laid in or on water without any special protective means. Since the light source is installed in a location apart from water, it can be easily maintained and lamp replacement is also easy. By selecting a desired one of the kinds of light source, the illumination can be changed, resulting in a great effect of illumination. If provided with a powerful light source, the waterproof lighting apparatus according to the present invention can be used for warning any hazardous area to walkers, bicycle riders, car drivers, ships, aircraft and the like vehicles. Even if the lighting apparatus is located far away, the light from the light-emitting portion permits the walker or vehicle driver to readily be aware of a hazardous area.Type: GrantFiled: August 9, 1993Date of Patent: February 29, 2000Assignee: Bridgestone CorporationInventors: Minoru Ishiharada, Itsuo Tanuma, Kazuo Naito, Yasuhiko Matsumuro, Takao Aoki, Kiyoshi Koyama