Patents by Inventor Masami Endo
Masami Endo 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: 20120033476Abstract: An object is to reduce, with the control circuit of the full-bridge inverter circuit, distortions in an output signal of the inverter circuit resulting from an error in control of the switching of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit. The pulse width of a signal that controls ON/OFF of the high-side transistors and low-side transistors included in the first half-bridge circuit and the second half-bridge circuit is reduced, i.e., the duty cycle of the signal is reduced. This results in a reduction in short-circuit periods during which both the high-side transistor and the low-side transistor are on, thereby reducing distortions in a signal.Type: ApplicationFiled: July 28, 2011Publication date: February 9, 2012Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Masami Endo
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Patent number: 8103897Abstract: Objects of the invention are to provide a clock generation circuit, in which, even when different clock signals are used among a plurality of circuits such as a transmitting circuit and a receiving circuit, stabilized communication is possible; and to provide a semiconductor device including the clock generation circuit. The clock generation circuit includes an edge detection circuit, a reference clock generation circuit, a reference clock counter circuit, and a frequency-divider circuit. The reference clock counter circuit is a circuit which outputs a counter value, which is obtained by counting the number of waves of a reference clock signal outputted from the reference clock generation circuit, in a period of time from when the edge detection circuit detects an edge of a signal which is externally inputted to the edge detection circuit to when the edge detection circuit detects the next edge, to the frequency-divider circuit.Type: GrantFiled: August 27, 2007Date of Patent: January 24, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Masami Endo, Takayuki Ikeda, Daisuke Kawae, Yoshiyuki Kurokawa
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Patent number: 8095104Abstract: A semiconductor device includes an antenna circuit for receiving a wireless signal, a power supply circuit generating power by the wireless signal received by the antenna circuit, and a clock generation circuit to which power is supplied. The clock generation circuit includes a ring oscillator which self-oscillates and a frequency divider which adjusts frequency of an output signal of the ring oscillator in an appropriate range. A digital circuit portion is driven by a clock having high frequency accuracy, so that a malfunction such as an incorrect operation or no response is prevented.Type: GrantFiled: June 21, 2007Date of Patent: January 10, 2012Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Daisuke Kawae, Masami Endo, Yoshiyuki Kurokawa, Takayuki Ikeda
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Patent number: 8087647Abstract: A fluid filled type cylindrical vibration damping device, wherein a circumferential end of a stopper member is formed as a mating element smaller in diameter than a circumferentially center section of the stopper member, and is juxtaposed against and supported on a bottom face of a mating groove in a communication passage, to form the communication passage along an entire area between diametrically opposed faces of the mating element and an outer tubular member. A cutout portion is formed extending in a circumferential direction from a circumferential end in a widthwise medial section of the mating element, with the communication passage opening into and communicating with a first fluid chamber at a distal end section of the cutout portion, and at two widthwise side sections of the mating element, respectively, thereby defining an orifice passage connecting the first fluid chamber with a second fluid chamber.Type: GrantFiled: November 14, 2008Date of Patent: January 3, 2012Assignee: Tokai Rubber Industries, Ltd.Inventor: Masami Endo
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Publication number: 20110298975Abstract: An object is to realize downsizing and cost reduction of a display device by efficiently using a physical region of a memory in a control circuit of the display device. A structure of a video data storage portion of the control circuit is that provided with a video data storage portion for storing video data of an n-th frame (n is a natural number), a video data storage portion for storing video data of an (n+1)th frame, and a video data storage portion for sharing video data of the n-th frame and the (n+1)th frame among received video data.Type: ApplicationFiled: August 17, 2011Publication date: December 8, 2011Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Masami Endo
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Publication number: 20110261864Abstract: In a case where an ASK method is used for a communication method between a semiconductor device and a reader/writer, the amplitude of a radio signal is changed by data transmitted from the semiconductor device to the reader/writer when data is not transmitted from the reader/writer to the semiconductor device. Therefore, in some cases, the semiconductor device mistakes data transmitted from the semiconductor device itself for data transmitted from the reader/writer to the semiconductor device. The semiconductor device includes an antenna circuit, a transmission circuit, a reception circuit, and an arithmetic processing circuit. The antenna circuit transmits and receives a radio signal. The transmission circuit outputs to the reception circuit a signal showing whether or not the antenna circuit is transmitting the radio signal.Type: ApplicationFiled: July 7, 2011Publication date: October 27, 2011Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Yoshiyuki KUROKAWA, Takayuki IKEDA, Masami ENDO, Hiroki DEMBO, Daisuke KAWAE, Takayuki INOUE
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Publication number: 20110233555Abstract: It is an object to provide a semiconductor device for high power application which has good properties. A means for solving the above-described problem is to form a transistor described below. The transistor includes a source electrode layer; an oxide semiconductor layer in contact with the source electrode layer; a drain electrode layer in contact with the oxide semiconductor layer; a gate electrode layer part of which overlaps with the source electrode layer, the drain electrode layer, and the oxide semiconductor layer; and a gate insulating layer in contact with an entire surface of the gate electrode layer.Type: ApplicationFiled: March 14, 2011Publication date: September 29, 2011Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Masami Endo
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Patent number: 8004510Abstract: An object is to realize downsizing and cost reduction of a display device by efficiently using a physical region of a memory in a control circuit of the display device. A structure of a video data storage portion of the control circuit is that provided with a video data storage portion for storing video data of an n-th frame (n is a natural number), a video data storage portion for storing video data of an (n+1)th frame, and a video data storage portion for sharing video data of the n-th frame and the (n+1)th frame among received video data.Type: GrantFiled: December 3, 2010Date of Patent: August 23, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Masami Endo
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Patent number: 7986216Abstract: In a case where an ASK method is used for a communication method between a semiconductor device and a reader/writer, the amplitude of a radio signal is changed by data transmitted from the semiconductor device to the reader/writer when data is not transmitted from the reader/writer to the semiconductor device. Therefore, in some cases, the semiconductor device mistakes data transmitted from the semiconductor device itself for data transmitted from the reader/writer to the semiconductor device. The semiconductor device includes an antenna circuit, a transmission circuit, a reception circuit, and an arithmetic processing circuit. The antenna circuit transmits and receives a radio signal. The transmission circuit outputs to the reception circuit a signal showing whether or not the antenna circuit is transmitting the radio signal.Type: GrantFiled: June 20, 2007Date of Patent: July 26, 2011Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Yoshiyuki Kurokawa, Takayuki Ikeda, Masami Endo, Hiroki Dembo, Daisuke Kawae, Takayuki Inoue
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Publication number: 20110096047Abstract: An object is to detect reflected light from an object accurately and to improve accuracy of capturing an image in a photosensor included in a display panel. In the display panel including a photosensor, when an image of an object is captured, light is emitted from a light source to the object and reflected light enters the photosensor. In the case where the incident light is too strong with respect to sensitivity of the photosensor, luminance of the light source is lowered. In the case where the incident light is too weak with respect to sensitivity of the photosensor, the luminance of the light source is increased.Type: ApplicationFiled: October 20, 2010Publication date: April 28, 2011Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Masami Endo
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Publication number: 20110074801Abstract: An object is to realize downsizing and cost reduction of a display device by efficiently using a physical region of a memory in a control circuit of the display device. A structure of a video data storage portion of the control circuit is that provided with a video data storage portion for storing video data of an n-th frame (n is a natural number), a video data storage portion for storing video data of an (n+1)th frame, and a video data storage portion for sharing video data of the n-th frame and the (n+1)th frame among received video data.Type: ApplicationFiled: December 3, 2010Publication date: March 31, 2011Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Masami Endo
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Publication number: 20110057725Abstract: A semiconductor device such as an RFID, which can easily generate a given stable potential, is provided. Circuits included in a semiconductor device are categorized depending on whether a given stable power source potential is necessary. A power source potential generated from a wireless signal received by an antenna with the use of the antenna and a rectifier circuit is supplied to a circuit which needs a given stable power source potential through a regulator. On the other hand, a power source potential generated by the rectifier circuit is supplied to a circuit other than the circuit which needs the arbitrary power source potential. Thus, a semiconductor device including a regulator circuit easily designed with a smaller layout can be provided, and the semiconductor device can easily generate a given stable power source potential.Type: ApplicationFiled: November 10, 2010Publication date: March 10, 2011Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventors: Takayuki IKEDA, Yoshiyuki KUROKAWA, Masami ENDO
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Patent number: 7866639Abstract: A fluid-filled cylindrical vibration-damping device including a main rubber elastic body elastically connecting an inner shaft member and an outer cylindrical member with each other. A pair of first fluid chambers are formed on diametrically opposite sides of the inner shaft member and a pair of second fluid chambers are formed being diametrically opposed to each other such that an opposing direction of the second fluid chambers is orthogonal to an opposing direction of the first fluid chambers. Each partition wall that partitions the first fluid chamber and the second fluid chamber extends in a direction in more proximity to the opposing direction of the first fluid chambers than to the opposing direction of the second fluid chambers so that spring rigidity as measured in the opposing direction of the first fluid chambers is set greater than spring rigidity as measured in the opposing direction of the second fluid chambers.Type: GrantFiled: October 16, 2009Date of Patent: January 11, 2011Assignee: Tokai Rubber Industries, Ltd.Inventor: Masami Endo
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Patent number: 7845624Abstract: A cylindrical fluid-filled elastic mount which has a structure that avoids or mitigates a deterioration of damping effect, when an outer cylindrical member is subjected to a diameter-reducing operation. A cylindrical fluid-filled elastic mount including; a communication groove connecting a pair of pockets in the circumferential direction formed in an elastic body; fluid chambers provided by the corresponding pockets; an orifice member having a trough-form protrusion in which both-side wall portions provided at an end of the orifice groove are formed by an elastic material. The trough-form protrusion is inserted in the communication groove. At least one hollow groove is provided along the communication groove where the trough-form protrusion is inserted, and the hollow groove is formed longer in the circumferential direction than a length of a protrusion part of the trough-form protrusion.Type: GrantFiled: March 8, 2007Date of Patent: December 7, 2010Assignee: Tokai Rubber Industries, Ltd.Inventors: Masami Endo, Kazuhiko Kato
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Patent number: 7847793Abstract: An object is to realize downsizing and cost reduction of a display device by efficiently using a physical region of a memory in a control circuit of the display device. A structure of a video data storage portion of the control circuit is that provided with a video data storage portion for storing video data of an n-th frame (n is a natural number), a video data storage portion for storing video data of an (n+1)th frame, and a video data storage portion for sharing video data of the n-th frame and the (n+1)th frame among received video data.Type: GrantFiled: November 21, 2006Date of Patent: December 7, 2010Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Masami Endo
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Patent number: 7832647Abstract: A semiconductor device such as an RFID, which can easily generate a given stable potential, is provided. Circuits included in a semiconductor device are categorized depending on whether a given stable power source potential is necessary. A power source potential generated from a wireless signal received by an antenna with the use of the antenna and a rectifier circuit is supplied to a circuit which needs a given stable power source potential through a regulator. On the other hand, a power source potential generated by the rectifier circuit is supplied to a circuit other than the circuit which needs the arbitrary power source potential. Thus, a semiconductor device including a regulator circuit easily designed with a smaller layout can be provided, and the semiconductor device can easily generate a given stable power source potential.Type: GrantFiled: June 22, 2007Date of Patent: November 16, 2010Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventors: Takayuki Ikeda, Yoshiyuki Kurokawa, Masami Endo
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Patent number: 7746143Abstract: An object is to provide a clock generating circuit that can suppress variation of an oscillation frequency from the clock generating circuit, which is due to a change in the output voltage according to a discharging characteristic of the battery, and effectively utilize the remaining power of the battery. A structure includes an output voltage detecting circuit for detecting an output voltage from a battery; a frequency-division number determining circuit for determining the number of frequency-division by a value of the output voltage detected by the output voltage detecting circuit; an oscillation circuit for outputting a reference clock signal depending on the output voltage; a counter circuit for counting a number of waves of the reference clock signal that depends on the number of frequency-division; and a frequency-dividing circuit that frequency-divides the reference clock signal depending on the number of waves counted by the counter circuit.Type: GrantFiled: November 19, 2007Date of Patent: June 29, 2010Assignee: Semiconductor Energy Laboratory Co., LtdInventor: Masami Endo
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Publication number: 20100156914Abstract: An object is to provide an image processing circuit adaptable to displays having a variety of pixel numbers. The image processing circuit includes a data adjustment circuit, a first line memory and a second line memory capable of storing K pieces of data, an output timing control circuit, and an arithmetic circuit. To the data adjustment circuit, (X×Y) pieces of pixel data are input. Y pieces of pixel data are transmitted to the first line memory. When Y is less than K, (K?Y) pieces of dummy data are added to fill the first line memory. Then, the K pieces of data are output from the first line memory to the second line memory and a new set of K data is input to the first line memory. The arithmetic circuit stores the data input from the line memories and performs filtering.Type: ApplicationFiled: December 16, 2009Publication date: June 24, 2010Applicant: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.Inventor: Masami Endo
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Publication number: 20100140856Abstract: A fluid-filled cylindrical vibration-damping device including a main rubber elastic body elastically connecting an inner shaft member and an outer cylindrical member with each other. A pair of first fluid chambers are formed on diametrically opposite sides of the inner shaft member and a pair of second fluid chambers are formed being diametrically opposed to each other such that an opposing direction of the second fluid chambers is orthogonal to an opposing direction of the first fluid chambers. Each partition wall that partitions the first fluid chamber and the second fluid chamber extends in a direction in more proximity to the opposing direction of the first fluid chambers than to the opposing direction of the second fluid chambers so that spring rigidity as measured in the opposing direction of the first fluid chambers is set greater than spring rigidity as measured in the opposing direction of the second fluid chambers.Type: ApplicationFiled: October 16, 2009Publication date: June 10, 2010Applicant: TOKAI RUBBER INDUSTRIES, LTD.Inventor: Masami Endo
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Patent number: 7705821Abstract: A driving method of a display device for performing time-division gray scale display is disclosed, which is capable of inputting accurate data into a panel by using one memory. M groups each having a pair of a first period and a second period are provided in one frame period. Video signals are written into a memory in the first period of at least one group among the m groups, while video signals are read out from the memory in the respective second periods of the m groups. The start timing of reading out video signals from the memory is synchronized with the start timing of each of the n sub-frame periods.Type: GrantFiled: January 19, 2006Date of Patent: April 27, 2010Assignee: Semiconductor Energy Laboratory Co., Ltd.Inventor: Masami Endo