Patents by Inventor Akihiro KAITA
Akihiro KAITA 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: 9939262Abstract: A light-emitting device that can switch between two modes: single light emission and intermittent light emission is provided. The light-emitting device includes a driver circuit that can supply a control pulse signal, a constant current power supply that is supplied with the control pulse signal and can supply a constant current pulse, and a light-emitting panel that is supplied with the constant current pulse. The driver circuit includes a start switch circuit that can supply a start signal, a pulse-interval modulation circuit that can supply a pulse-interval modulation signal, and a microcomputer that is supplied with the start signal and the pulse-interval modulation signal and can supply the control pulse signal.Type: GrantFiled: August 18, 2014Date of Patent: April 10, 2018Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Nobuharu Ohsawa, Hisao Ikeda, Daiki Nakamura, Akihiro Kaita, Masatoshi Kataniwa
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Publication number: 20180084170Abstract: A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived.Type: ApplicationFiled: December 1, 2017Publication date: March 22, 2018Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Nobuharu OHSAWA, Hisao IKEDA, Kazuhiko FUJITA, Akihiro KAITA
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Patent number: 9843707Abstract: A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived.Type: GrantFiled: April 11, 2016Date of Patent: December 12, 2017Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Nobuharu Ohsawa, Hisao Ikeda, Kazuhiko Fujita, Akihiro Kaita
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Publication number: 20170013689Abstract: To provide a light-emitting device whose amount of light can be adjusted, or the like. The amount of light emitted from the light-emitting device can be adjusted by controlling the magnitude of the constant current pulse by a control signal. Specifically, the light-emitting device includes a constant current supply configured to be supplied with a control signal and a control pulse signal and configured to supply a constant current pulse; a control device configured to supply the control signal; a driver circuit configured to supply the control pulse signal; and a light-emitting panel configured to be supplied with the constant current pulse. The control signal is a signal for controlling the magnitude of the constant current pulse. The light-emitting panel includes a light-emitting element. The current density of the light-emitting element is greater than or equal to 10 mA/cm2 and less than or equal to 1000 mA/cm2.Type: ApplicationFiled: September 26, 2016Publication date: January 12, 2017Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daiki Nakamura, Nobuharu Ohsawa, Hisao Ikeda, Akihiro Kaita, Shunpei Yamazaki
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Patent number: 9462646Abstract: To provide a light-emitting device whose amount of light can be adjusted, or the like. The amount of light emitted from the light-emitting device can be adjusted by controlling the magnitude of the constant current pulse by a control signal. Specifically, the light-emitting device includes a constant current supply configured to be supplied with a control signal and a control pulse signal and configured to supply a constant current pulse; a control device configured to supply the control signal; a driver circuit configured to supply the control pulse signal; and a light-emitting panel configured to be supplied with the constant current pulse. The control signal is a signal for controlling the magnitude of the constant current pulse. The light-emitting panel includes a light-emitting element. The current density of the light-emitting element is greater than or equal to 10 mA/cm2 and less than or equal to 1000 mA/cm2.Type: GrantFiled: February 25, 2016Date of Patent: October 4, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daiki Nakamura, Nobuharu Ohsawa, Hisao Ikeda, Akihiro Kaita, Shunpei Yamazaki
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Publication number: 20160227087Abstract: A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived.Type: ApplicationFiled: April 11, 2016Publication date: August 4, 2016Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Nobuharu OHSAWA, Hisao IKEDA, Kazuhiko FUJITA, Akihiro KAITA
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Publication number: 20160174313Abstract: To provide a light-emitting device whose amount of light can be adjusted, or the like. The amount of light emitted from the light-emitting device can be adjusted by controlling the magnitude of the constant current pulse by a control signal. Specifically, the light-emitting device includes a constant current supply configured to be supplied with a control signal and a control pulse signal and configured to supply a constant current pulse; a control device configured to supply the control signal; a driver circuit configured to supply the control pulse signal; and a light-emitting panel configured to be supplied with the constant current pulse. The control signal is a signal for controlling the magnitude of the constant current pulse. The light-emitting panel includes a light-emitting element. The current density of the light-emitting element is greater than or equal to 10 mA/cm2 and less than or equal to 1000 mA/cm2.Type: ApplicationFiled: February 25, 2016Publication date: June 16, 2016Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: DAIKI NAKAMURA, NOBUHARU OHSAWA, HISAO IKEDA, AKIHIRO KAITA, SHUNPEI YAMAZAKI
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Patent number: 9319596Abstract: A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived.Type: GrantFiled: May 19, 2014Date of Patent: April 19, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Nobuharu Ohsawa, Hisao Ikeda, Kazuhiko Fujita, Akihiro Kaita
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Publication number: 20160103649Abstract: To provide a display device that is suitable for increasing in size. To provide a display device in which display unevenness is suppressed. To provide a display device that can display an image along a curved surface. The display device includes two display panels, two plates, two stages, two driver circuits, two adjusting units, and a frame. Each display panel includes a display portion, an operating circuit portion, a terminal, an external electrode, a transparent portion, and a first portion and has flexibility. Each transparent portion includes a region transmitting visible light. The display panels are fixed so that transparent portions and parts of the display portions extend beyond the plates. The display portion of one of the two display panels overlaps with the transparent portion of the other display panel.Type: ApplicationFiled: October 6, 2015Publication date: April 14, 2016Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yusuke Yoshitani, Kazuhiko Fujita, Akihiro Kaita
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Patent number: 9277627Abstract: To provide a light-emitting device whose amount of light can be adjusted, or the like. The amount of light emitted from the light-emitting device can be adjusted by controlling the magnitude of the constant current pulse by a control signal. Specifically, the light-emitting device includes a constant current supply configured to be supplied with a control signal and a control pulse signal and configured to supply a constant current pulse; a control device configured to supply the control signal; a driver circuit configured to supply the control pulse signal; and a light-emitting panel configured to be supplied with the constant current pulse. The control signal is a signal for controlling the magnitude of the constant current pulse. The light-emitting panel includes a light-emitting element. The current density of the light-emitting element is greater than or equal to 10 mA/cm2 and less than or equal to 1000 mA/cm2.Type: GrantFiled: June 26, 2014Date of Patent: March 1, 2016Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daiki Nakamura, Nobuharu Ohsawa, Hisao Ikeda, Akihiro Kaita, Shunpei Yamazaki
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Publication number: 20150055118Abstract: A light-emitting device that can switch between two modes: single light emission and intermittent light emission is provided. The light-emitting device includes a driver circuit that can supply a control pulse signal, a constant current power supply that is supplied with the control pulse signal and can supply a constant current pulse, and a light-emitting panel that is supplied with the constant current pulse. The driver circuit includes a start switch circuit that can supply a start signal, a pulse-interval modulation circuit that can supply a pulse-interval modulation signal, and a microcomputer that is supplied with the start signal and the pulse-interval modulation signal and can supply the control pulse signal.Type: ApplicationFiled: August 18, 2014Publication date: February 26, 2015Inventors: Shunpei Yamazaki, Yoshiharu Hirakata, Nobuharu Ohsawa, Hisao Ikeda, Daiki Nakamura, Akihiro Kaita, Masatoshi Kataniwa
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Publication number: 20150003034Abstract: To provide a light-emitting device whose amount of light can be adjusted, or the like. The amount of light emitted from the light-emitting device can be adjusted by controlling the magnitude of the constant current pulse by a control signal. Specifically, the light-emitting device includes a constant current supply configured to be supplied with a control signal and a control pulse signal and configured to supply a constant current pulse; a control device configured to supply the control signal; a driver circuit configured to supply the control pulse signal; and a light-emitting panel configured to be supplied with the constant current pulse. The control signal is a signal for controlling the magnitude of the constant current pulse. The light-emitting panel includes a light-emitting element. The current density of the light-emitting element is greater than or equal to 10 mA/cm2 and less than or equal to 1000 mA/cm2.Type: ApplicationFiled: June 26, 2014Publication date: January 1, 2015Inventors: Daiki NAKAMURA, Nobuharu OHSAWA, Hisao IKEDA, Akihiro KAITA, Shunpei YAMAZAKI
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Publication number: 20140347555Abstract: A small light-emitting device is provided. A light-emitting device which is less likely to produce a shadow is provided. A structure including a switching circuit for supplying a pulsed constant current and a light-emitting panel supplied with the pulsed constant current has been conceived.Type: ApplicationFiled: May 19, 2014Publication date: November 27, 2014Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Nobuharu OHSAWA, Hisao IKEDA, Kazuhiko FUJITA, Akihiro KAITA
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Patent number: D762640Type: GrantFiled: January 27, 2014Date of Patent: August 2, 2016Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Shunpei Yamazaki, Akihiro Kaita