Patents by Inventor Keisuke Hayashi
Keisuke Hayashi 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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Publication number: 20090090954Abstract: Memory elements, switching elements, and peripheral circuits to constitute a nonvolatile memory are integrally formed on a substrate by using TFTs. Since semiconductor active layers of memory element TFTs are thinner than those of other TFTs, impact ionization easily occurs in channel regions of the memory element TFTs. This enables low-voltage write/erase operations to be performed on the memory elements, and hence the memory elements are less prone to deteriorate. Therefore, a nonvolatile memory capable of miniaturization can be provided.Type: ApplicationFiled: March 12, 2008Publication date: April 9, 2009Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Shunpei YAMAZAKI, Jun KOYAMA, Keisuke HAYASHI
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Publication number: 20090002460Abstract: A liquid discharging head includes a piezoelectric actuator configured to displace a vibration plate to cause a nozzle to discharge a liquid drop from a liquid chamber. The piezoelectric actuator includes at least three piezoelectric elements aligned in a line. Each of the at least three piezoelectric elements includes a plurality of piezoelectric element columns and a groove. The plurality of piezoelectric element columns is aligned in a direction in which the at least three piezoelectric elements are aligned. The groove is provided between adjacent piezoelectric element columns. At least one of the at least three piezoelectric elements has a pitch between adjacent piezoelectric element columns that is different from a pitch between adjacent piezoelectric element columns of at least one other piezoelectric element of the at least three piezoelectric elements.Type: ApplicationFiled: May 29, 2008Publication date: January 1, 2009Applicant: RICOH COMPANY, LTD.Inventor: Keisuke HAYASHI
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Publication number: 20080143795Abstract: A liquid discharging head includes a piezoelectric actuator including a plurality of piezoelectric elements and a plurality of electric supply members. The plurality of piezoelectric elements is provided in a row and includes an even number of piezoelectric element columns provided via a groove at a predetermined pitch. The plurality of electric supply members supplies electricity to the plurality of piezoelectric elements and includes electrodes disposed for the alternate piezoelectric element columns of the respective piezoelectric elements. One end of the electric supply member is positioned outwardly from an outer end of an endmost driven piezoelectric element column to which the electrode is connected, while another end of the electric supply member is positioned inwardly from an outer end of an endmost non-driven piezoelectric element column to which the electrode is not connected, in a manner that adjacent electric supply members do not overlap.Type: ApplicationFiled: November 30, 2007Publication date: June 19, 2008Applicant: Ricoh Company, Ltd.Inventor: Keisuke HAYASHI
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Patent number: 7368338Abstract: Memory elements, switching elements, and peripheral circuits to constitute a nonvolatile memory are integrally formed on a substrate by using TFTs. Since semiconductor active layers of memory element TFTs are thinner than those of other TFTs, impact ionization easily occurs in channel regions of the memory element TFTs. This enables low-voltage write/erase operations to be performed on the memory elements, and hence the memory elements are less prone to deteriorate. Therefore, a nonvolatile memory capable of miniaturization can be provided.Type: GrantFiled: May 1, 2006Date of Patent: May 6, 2008Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Publication number: 20070291084Abstract: A disclosed liquid jet head includes a nozzle plate having plural nozzles for jetting liquid therefrom, plural flowpaths formed in communication with the plural nozzles, a vibration plate member having a flexible part that forms at least one of the walls of each flowpath, and plural piezoelectric element units having a piezoelectric element member fixed to a base member. Each piezoelectric element unit has plural piezoelectric elements divided by a plurality of slits formed in the piezoelectric element member. The plural piezoelectric element units are arranged in a straight line at predetermined intervals along the plural nozzles.Type: ApplicationFiled: May 21, 2007Publication date: December 20, 2007Inventor: Keisuke Hayashi
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Patent number: 7158098Abstract: To provide a portable information processing system with which downsizing and increase in display capacity may be realized. The portable information processing system according to the present invention displays, on an HMD (head mount display) worn by a user on his or her head, an image displayed on a display portion of a portable information terminal. The system employs wireless information transmitting/receiving means such as infrarer-ray data communication or data communication by radio wave to transmit and receive information between the portable information terminal and the HMD.Type: GrantFiled: January 25, 2005Date of Patent: January 2, 2007Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Publication number: 20060238483Abstract: There is provided a driving circuit which is simple and has a small occupied area. A shift register circuit of the present invention includes a plurality of register circuits. Each of the register circuits includes a clocked inverter circuit and an inverter circuit. Both are connected in series with each other so that an output signal of the clocked inverter circuit becomes an input signal of the inverter circuit. Further, the register circuit includes a signal line by which an output signal of the inverter circuit is transmitted. Since a number of elements are connected to the signal line and parasitic capacitance is large, it has a high load. The shift register circuit of the present invention uses the fact that since the parasitic capacitance of the signal line is large, it has a high load.Type: ApplicationFiled: June 7, 2006Publication date: October 26, 2006Inventors: Yukio Tanaka, Keisuke Hayashi
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Publication number: 20060197155Abstract: Memory elements, switching elements, and peripheral circuits to constitute a nonvolatile memory are integrally formed on a substrate by using TFTs. Since semiconductor active layers of memory element TFTs are thinner than those of other TFTs, impact ionization easily occurs in channel regions of the memory element TFTs. This enables low-voltage write/erase operations to be performed on the memory elements, and hence the memory elements are less prone to deteriorate. Therefore, a nonvolatile memory capable of miniaturization can be provided.Type: ApplicationFiled: May 1, 2006Publication date: September 7, 2006Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Patent number: 7078769Abstract: Memory elements, switching elements, and peripheral circuits to constitute a nonvolatile memory are integrally formed on a substrate by using TFTs. Since semiconductor active layers of memory element TFTs are thinner than those of other TFTs, impact ionization easily occurs in channel regions of the memory element TFTs. This enables low-voltage write/erase operations to be performed on the memory elements, and hence the memory elements are less prone to deteriorate. Therefore, a nonvolatile memory capable of miniaturization can be provided.Type: GrantFiled: June 15, 2004Date of Patent: July 18, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Patent number: 7075510Abstract: There is provided a driving circuit which is simple and has a small occupied area. A shift register circuit of the present invention includes a plurality of register circuits. Each of the register circuits includes a clocked inverter circuit and an inverter circuit. Both are connected in series with each other so that an output signal of the clocked inverter circuit becomes an input signal of the inverter circuit. Further, the register circuit includes a signal line by which an output signal of the inverter circuit is transmitted. Since a number of elements are connected to the signal line and parasitic capacitance is large, it has a high load. The shift register circuit of the present invention uses the fact that since the parasitic capacitance of the signal line is large, it has a high load.Type: GrantFiled: January 31, 2003Date of Patent: July 11, 2006Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yukio Tanaka, Keisuke Hayashi
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Publication number: 20050195129Abstract: To provide a portable information processing system with which downsizing and increase in display capacity may be realized. The portable information processing system according to the present invention displays, on an HMD (head mount display) worn by a user on his or her head, an image displayed on a display portion of a portable information terminal. The system employs wireless information transmitting/receiving means such as infrarer-ray data communication or data communication by radio wave to transmit and receive information between the portable information terminal and the HMD.Type: ApplicationFiled: January 25, 2005Publication date: September 8, 2005Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Publication number: 20050116882Abstract: To provide a goggle type display device system that can prevent harm to user's health. If anomaly is recognized in mind and body of a user, first video signals provided from an external device stop being displayed on LCD panels and, instead, outside scenery taken by CCD image capture elements is displayed. The user may be alarmed by this about anomaly of his or her body and, further, relaxed by looking at the outside scenery presented.Type: ApplicationFiled: January 6, 2005Publication date: June 2, 2005Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Patent number: 6867752Abstract: To provide a portable information processing system with which downsizing and increase in display capacity may be realized. The portable information processing system according to the present invention displays, on an HMD (head mount display) worn by a user on his or her head, an image displayed on a display portion of a portable information terminal. The system employs wireless information transmitting/receiving means such as infrared-ray data communication or data communication by radio wave to transmit and receive information between the portable information terminal and the HMD.Type: GrantFiled: August 30, 1999Date of Patent: March 15, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Patent number: 6856304Abstract: A liquid crystal projector has a white light source, dichroic mirrors for separating white light coming from the white light source into beams of a plurality of colors, a liquid crystal panel having a number of pixels, microlens arrays for introducing the beams of the plurality of colors individually to apertures of the pixels of the liquid crystal panel, and a screen onto which the beams of the plurality of colors that have been modulated by the liquid crystal panel are projected. A micro-PBS array is disposed immediately before the incident side of the liquid crystal panel, and polarizes the beams of the plurality of colors into polarized beams that correspond to the respective pixels of the liquid crystal panel.Type: GrantFiled: January 19, 1999Date of Patent: February 15, 2005Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiharu Hirakata, Keisuke Hayashi
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Publication number: 20040222424Abstract: Memory elements, switching elements, and peripheral circuits to constitute a nonvolatile memory are integrally formed on a substrate by using TFTs. Since semiconductor active layers of memory element TFTs are thinner than those of other TFTs, impact ionization easily occurs in channel regions of the memory element TFTs. This enables low-voltage write/erase operations to be performed on the memory elements, and hence the memory elements are less prone to deteriorate. Therefore, a nonvolatile memory capable of miniaturization can be provided.Type: ApplicationFiled: June 15, 2004Publication date: November 11, 2004Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Patent number: 6756640Abstract: Memory elements, switching elements, and peripheral circuits to constitute a nonvolatile memory are integrally formed on a substrate by using TFTs. Since semiconductor active layers of memory element TFTs are thinner than those of other TFTs, impact ionization easily occurs in channel regions of the memory element TFTs. This enables low-voltage write/erase operations to be performed on the memory elements, and hence the memory elements are less prone to deteriorate. Therefore, a nonvolatile memory capable of miniaturization can be provided.Type: GrantFiled: December 18, 2002Date of Patent: June 29, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Patent number: 6753854Abstract: A liquid crystal display device having a digital driver is provided, which can realize higher definition and more gradations. A liquid crystal display device having a pixel region in which a plural number of pixel TFTs are arranged in a matrix shape, a source driver and a gate driver for driving the plural number of TFTs, and a circuit for converting externally inputted m-bit digital video data into 2m−n pieces of n-bit digital video data (where m and n are both positive integers greater than or equal to 2, and m>n), and for supplying the n-bit digital video data to the source driver, is provided. The liquid crystal display device is characterized in that the 2m−n pieces of n-bit digital data is outputted randomly, and in that a one-frame image is formed by displaying 2m−n subframes formed by the n-bit digital data.Type: GrantFiled: April 26, 2000Date of Patent: June 22, 2004Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Jun Koyama, Keisuke Hayashi
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Publication number: 20030137482Abstract: There is provided a driving circuit which is simple and has a small occupied area. A shift register circuit of the present invention includes a plurality of register circuits. Each of the register circuits includes a clocked inverter circuit and an inverter circuit. Both are connected in series with each other so that an output signal of the clocked inverter circuit becomes an input signal of the inverter circuit. Further, the register circuit includes a signal line by which an output signal of the inverter circuit is transmitted. Since a number of elements are connected to the signal line and parasitic capacitance is large, it has a high load. The shift register circuit of the present invention uses the fact that since the parasitic capacitance of the signal line is large, it has a high load.Type: ApplicationFiled: January 31, 2003Publication date: July 24, 2003Applicant: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yukio Tanaka, Keisuke Hayashi
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Patent number: 6597348Abstract: An information-processing device which comprises a field sequential display unit and a touch panel, said sequential display unit having a back light to supply three-color light and an image display part which forms an image for one frame by the sequential time-sharing display of three subframes corresponding to said three-color light, and said touch panel having an optical guide plate of transparent material, an optical sensor array whose light receiving surface is opposite to the side of said optical guide plate, a lens sheet whose light emitting surface is opposite to that side of said optical guide plate which is opposite to said side, and an illuminating means to illuminate the plane of incidence of said lens sheet. The information-processing device is superior in resistance to extraneous light, contamination, and mechanical shock and has a touch panel for high-precision display capable of accurately detecting positions and entering information.Type: GrantFiled: December 23, 1999Date of Patent: July 22, 2003Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Shunpei Yamazaki, Jun Koyama, Keisuke Hayashi
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Patent number: 6590581Abstract: A display device having a pixel section is provided, in which a plural number of pixel TFTs are arranged in a matrix shape; a source driver and a gate driver for driving the plural number of TFTs; a processing circuit for converting externally inputted m-bit digital video data into 2m−n pieces of n-bit digital video data (where m and n are both positive integers greater than or equal to 2, and m>n); and a D/A converter circuit for converting the n-bit digital video data into analog video data, and for outputting the n-bit digital video data to the source driver. The display device is characterized in that the processing circuit randomly outputs the 2m−n pieces of n-bit digital data to the D/A converter circuit, and in that a one-frame image is formed by displaying 2m−n subframes formed from the n-bit digital video data.Type: GrantFiled: May 4, 2000Date of Patent: July 8, 2003Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Jun Koyama, Keisuke Hayashi