Patents by Inventor Etsuo Yamamoto
Etsuo Yamamoto 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: 8779809Abstract: A signal processing circuit of the present invention includes: first and second input terminals; an output terminal; a bootstrap capacitor; a first output section connected to the second input terminal and the output terminal; a second output section connected to the first input terminal, a first power source, and the output terminal; and an electric charge control section for controlling the electric charge of the bootstrap capacitor, the electric charge control section being connected to the first input terminal, the electric charge control section and the first output section being connected to each other via a relay section for either electrically connecting the electric charge control section and the first output section to each other or electrically blocking the electric charge control section and the first output section from each other, the electric charge control section including a resistor connected to a second power source.Type: GrantFiled: August 31, 2011Date of Patent: July 15, 2014Assignee: Sharp Kabushiki KaishaInventors: Yuhichiroh Murakami, Yasushi Sasaki, Etsuo Yamamoto
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Patent number: 8736534Abstract: In one embodiment of the present invention, on each source bus line, an electric charge escaping transistor is provided having the same polarity as a pixel transistor and having a gate to which a turn-off voltage signal of the pixel transistor is supplied. When an active matrix liquid crystal display device is powered off, the turn-off voltage signal is made to reach the GND level before a turn-on voltage signal of the pixel transistor reaches the GND level, so that the pixel transistor and the electric charge escaping transistor are made half-open. This lets electric charges accumulated in the pixel escape to a common electrode TCOM.Type: GrantFiled: July 11, 2006Date of Patent: May 27, 2014Assignee: Sharp Kabushiki KaishaInventors: Etsuo Yamamoto, Yuhichiroh Murakami, Yasushi Sasaki, Seijirou Gyouten
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Publication number: 20140117449Abstract: A circuit which is constituted by a plurality of n-channel transistors includes, in at least one embodiment, a transistor (T1) which has a drain terminal to which an input signal is supplied and a source terminal from which a output signal is supplied; and a transistor (T2) which has a drain terminal to which a control signal is supplied and a source terminal connected to a gate terminal of the transistor (T1). A gate terminal of the transistor (T2) is connected to the source terminal of the transistor (T2). With the arrangement, it is possible to provide (i) a semiconductor device which is constituted by transistors having an identical conductivity type and which is capable of reducing an influence of noise, and (ii) a display device including the semiconductor device.Type: ApplicationFiled: January 6, 2014Publication date: May 1, 2014Applicant: SHARP KABUSHIKI KAISHAInventors: Etsuo YAMAMOTO, Yasushi SASAKI, Yuhichiroh MURAKAMI, Shige FURUTA
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Patent number: 8675811Abstract: A circuit which is constituted by a plurality of n-channel transistors includes, in at least one embodiment, a transistor (T1) which has a drain terminal to which an input signal is supplied and a source terminal from which a output signal is supplied; and a transistor (T2) which has a drain terminal to which a control signal is supplied and a source terminal connected to a gate terminal of the transistor (T1). A gate terminal of the transistor (T2) is connected to the source terminal of the transistor (T2). With the arrangement, it is possible to provide (i) a semiconductor device which is constituted by transistors having an identical conductivity type and which is capable of reducing an influence of noise, and (ii) a display device including the semiconductor device.Type: GrantFiled: August 20, 2008Date of Patent: March 18, 2014Assignee: Sharp Kabushiki KaishaInventors: Etsuo Yamamoto, Yasushi Sasaki, Yuhichiroh Murakami, Shige Furuta
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Publication number: 20130194033Abstract: A signal processing circuit of the present invention includes: first and second input terminals; an output terminal; a bootstrap capacitor; a first output section connected to the second input terminal and the output terminal; a second output section connected to the first input terminal, a first power source, and the output terminal; an electric charge control section for controlling the electric charge of the bootstrap capacitor, the electric charge control section being connected to the first input terminal; and a resistor having (i) a first end connected to the output terminal and (ii) a second end connected to a second power source. This arrangement allows the signal processing circuit to maintain an output potential even after a bootstrap effect has worn off.Type: ApplicationFiled: August 31, 2011Publication date: August 1, 2013Inventors: Yuhichiroh Murakami, Yasushi Sasaki, Etsuo Yamamoto
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Patent number: 8497834Abstract: A signal output circuit of the present invention is provided in a unit stage of a shift register. The signal output circuit includes a set-reset flip-flop, and a signal generation circuit for generating an output signal by loading or blocking a clock signal in accordance with a signal inputted thereto. The signal output circuit is arranged such that: the signal generation circuit receives a signal outputted from the flip-flop and the output signal fed back to the signal generating circuit; and the output signal is fed back to a reset input of the flip-flop. This makes it possible to achieve a reduction in the area of the circuit and a simplification of the circuit.Type: GrantFiled: November 12, 2012Date of Patent: July 30, 2013Assignee: Sharp Kabushiki KaishaInventors: Etsuo Yamamoto, Yuhichiroh Murakami, Eiji Matsuda
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Publication number: 20130169319Abstract: A signal processing circuit of the present invention includes: a first input terminal; a second input terminal; a third input terminal; a first node; a second node; an output terminal; a resistor; a first signal generating section which (i) is connected to the first node, a third input terminal, and the output terminal and (ii) includes a bootstrap capacitor; and a second signal generating section which is connected to the second node, a first power supply, and the output terminal. The first node becomes active in a case where the first input terminal becomes active. The second node becomes active in a case where the second input terminal becomes active. The output terminal is connected to the first power supply via the resistor. With the configuration, it is possible to have an improvement in operational stability of the signal processing circuit.Type: ApplicationFiled: August 31, 2011Publication date: July 4, 2013Applicant: Sharp Kabushiki KaishaInventors: Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
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Publication number: 20130155044Abstract: A unit circuit (11) includes: a transistor (T2) having its drain terminal to be supplied with a clock signal (CK) and its source terminal connected to an output terminal (OUT); a transistor (T9) which, when supplied with an active all-on control signal (AON), outputs an ON voltage to the output terminal (OUT), and which, when supplied with a nonactive all-on control signal (AONB), stops outputting the ON voltage; a transistor (T1) which supplies the ON voltage to a control terminal of the transistor (T2) in accordance with an input signal (IN); a transistor (T4) which, when supplied with the active all-on control signal (AON), supplies an OFF voltage to a control terminal of the transistor (T2). This makes it possible to provide a shift register of a simple structure that can prevent a malfunction from occurring after all-on operation, and to provide a display device.Type: ApplicationFiled: August 30, 2011Publication date: June 20, 2013Inventors: Hiroyuki Ohkawa, Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
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Publication number: 20130153941Abstract: A semiconductor device (10) provided with at least a plurality of transistors and bootstrap capacitors (Ca1 and Cb1), the semiconductor device (10) includes: a semiconductor layer (22) made of the same material as a channel layer of each of the transistors; a capacitor electrode (24) formed in an upper layer of the semiconductor layer (22); and a clock signal line (17) formed in an upper layer of the capacitor electrode (24), the capacitor electrode (24) being connected to a gate electrode of each of the transistors, the clock signal line (17) being supplied with a clock signal (CK) from outside the semiconductor device (10), the capacitors (Ca1 and Cb1) each being formed in an overlap section where the semiconductor layer (22), the gate insulating film (23) and the capacitor electrode (24) overlap one another, the overlap section and the clock signal line (17) overlapping each other when viewed from above.Type: ApplicationFiled: August 26, 2011Publication date: June 20, 2013Inventors: Osamu Sasaki, Yuhichiroh Murakami, Yasushi Sasaki, Etsuo Yamamoto
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Publication number: 20130154374Abstract: A signal processing circuit of the present invention includes: first and second input terminals; an output terminal; a bootstrap capacitor; a first output section connected to the second input terminal and the output terminal; a second output section connected to the first input terminal, a first power source, and the output terminal; and an electric charge control section for controlling the electric charge of the bootstrap capacitor, the electric charge control section being connected to the first input terminal, the electric charge control section and the first output section being connected to each other via a relay section for either electrically connecting the electric charge control section and the first output section to each other or electrically blocking the electric charge control section and the first output section from each other, the electric charge control section including a resistor connected to a second power source.Type: ApplicationFiled: August 31, 2011Publication date: June 20, 2013Inventors: Yuhichiroh Murakami, Yasushi Sasaki, Etsuo Yamamoto
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Publication number: 20130156148Abstract: A flip-flop of the present invention includes: an input terminal; an output terminal; a first control signal terminal and a second control signal terminal; a first output section including a bootstrap capacitor, the first output section being connected to the first control signal terminal and the output terminal; a second output section connected to a first output section source and the output terminal; a first input section connected to the input terminal, the first input section charging the bootstrap capacitor; a discharge section discharging the bootstrap capacitor; a second input section connected to the input terminal, the second input section being also connected to the second output section; a reset section controlling the discharge section and the second output section, the reset section being connected to the second control signal terminal; a first initialization section controlling the first output section; a second initialization section controlling the first input section; and a third initializatType: ApplicationFiled: August 31, 2011Publication date: June 20, 2013Applicant: Sharp Kabushiki KaishaInventors: Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
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Publication number: 20130147524Abstract: A transistor circuit includes at least one transistor, wherein at least part of a connecting portion that connects the transistor (Tr1) and a power supply line (33) is formed from a material of which a channel of the transistor (Tr1) is made. This configuration reduces a circuit area of the transistor circuit.Type: ApplicationFiled: September 1, 2011Publication date: June 13, 2013Applicant: Sharp Kabushiki KaishaInventors: Takuya Hachida, Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
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Patent number: 8439998Abstract: In sintering a metal powder after pressure molding into a given configuration, random amorphous flaky metal fine powders (10) are used as metal powder materials. In addition, spherical particulate metal powders 11 are used as main materials, and random amorphous flaky metal fine powders 10 having finer particle size than the metal powders 11 and produced by fracturing a metal fracture material by means of high-velocity gas swirling flow are used as sub-materials, and molding and sintering are performed in a state of dispersing the sub-materials (10) in the main materials (11). Thus, despite being a power metallurgical product, it is possible to obtain a metal product having a dense metallographic structure and excellent in properties such as mechanical strength.Type: GrantFiled: December 2, 2005Date of Patent: May 14, 2013Assignees: Sunrex Kogyo Co., Ltd., Nanopulus Co., Ltd., Ace Giken Co., Ltd.Inventors: Kenzo Ito, Masahiro Yamamoto, Etsuo Yamamoto
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Patent number: 8427206Abstract: A single-phase input including transistors all of which have only a single type of channel polarity, which buffer includes: a buffer section 32, including a first series circuit formed by two n-channel transistors connected to each other in series, a second series circuit formed by two n-channel transistors connected to each other in series at a connection point OUT, and a capacitor; and an inverted-signal generating section for generating an inverted-signal from an input signal, the inverted-signal generating section including n-channel transistors but no p-channel transistor, the input signal being inputted to respective gates of the transistors, the inverted-signal being inputted to a gate of the transistor 4, and an output signal being outputted via the connection point OUT. With the buffer, it is possible that a consumption current be reduced and a current drive for a load is enhanced.Type: GrantFiled: August 19, 2008Date of Patent: April 23, 2013Assignee: Sharp Kabushiki KaishaInventors: Etsuo Yamamoto, Yuhichiroh Murakami, Yasushi Sasaki, Seijirou Gyouten, Shinsaku Shimizu
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Publication number: 20130069920Abstract: A signal output circuit of the present invention is provided in a unit stage of a shift register. The signal output circuit includes a set-reset flip-flop, and a signal generation circuit for generating an output signal by loading or blocking a clock signal in accordance with a signal inputted thereto. The signal output circuit is arranged such that: the signal generation circuit receives a signal outputted from the flip-flop and the output signal fed back to the signal generating circuit; and the output signal is fed back to a reset input of the flip-flop. This makes it possible to achieve a reduction in the area of the circuit and a simplification of the circuit.Type: ApplicationFiled: November 12, 2012Publication date: March 21, 2013Inventors: Etsuo Yamamoto, Yuhichiroh Murakami, Eiji Matsuda
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Patent number: 8398007Abstract: A jet mill in which crushed material introduced into a crushing chamber is comminuted by gas being sprayed from a plurality of gas-jet nozzles, wherein high-efficiency pulverization is performed by optimizing various pulverization conditions according to the type of crushed material or other such properties. The direction in which gas is sprayed into the crushing chamber is variable adjustable; the spraying direction of each nozzle is displaced simultaneously by the electromotive actuator; swirl flow is produced in three dimensions, including the flow of a directional component that is perpendicular to the horizontal swirl flow; and a fine-powder discharge port of a first pulverization chamber and a fine powder introduction port of a second pulverization chamber are communicatingly connected by a ventilation duct.Type: GrantFiled: October 18, 2011Date of Patent: March 19, 2013Assignees: Sunrex Kogyo Co., Ltd., Nanoplus Co., Ltd., Ace Giken Co., Ltd.Inventors: Kenzo Ito, Masahiro Yamamoto, Etsuo Yamamoto
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Patent number: 8344988Abstract: A signal output circuit of one embodiment of the present invention is provided in a unit stage of a shift register. The signal output circuit includes a set-reset flip-flop, and a signal generation circuit for generating an output signal by loading or blocking a clock signal in accordance with a signal inputted thereto. The signal output circuit is arranged such that: the signal generation circuit receives a signal outputted from the flip-flop and the output signal fed back to the signal generating circuit; and the output signal is fed back to a reset input of the flip-flop. This makes it possible to achieve a reduction in the area of the circuit and a simplification of the circuit.Type: GrantFiled: July 13, 2006Date of Patent: January 1, 2013Assignee: Sharp Kabushiki KaishaInventors: Etsuo Yamamoto, Yuhichiroh Murakami, Eiji Matsuda
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Publication number: 20120206510Abstract: A display device employing CC driving switches from (i) a first mode in which to carry out a display by converting resolution of a video signal by a factor of 2 in a column-wise direction to (ii) a second mode in which to carry out a display at the resolution of the video signal. During the first mode, signal potentials having the same polarity and the same gray scale are supplied to pixel electrodes included in respective two pixels that correspond to two adjacent scanning signal lines and that are adjacent to each other in the column-wise direction, and a direction of change in the signal potentials written to the pixel electrodes varies every two adjacent rows (2-line inversion driving). During the second mode, the direction of change in the signal potentials written to the pixel electrodes lines varies every single row (1-line inversion driving).Type: ApplicationFiled: June 4, 2010Publication date: August 16, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Shige Furuta, Etsuo Yamamoto, Yuhichiroh Murakami, Seijirou Gyouten
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Publication number: 20120200614Abstract: In a display device (i) which carries out a display based on a video signal whose resolution has been converted to higher resolution (high-resolution conversion driving) and (ii) which carries out CC driving, when the resolution of the video signal is converted by a factor of 2 (double-size display), assuming that a direction in which the gate lines extend is a row-wise direction, signal potentials having the same polarity and the same gray scale are supplied to pixel electrodes included in respective two pixels that correspond to two adjacent gate lines and that are adjacent to each other in the column-wise direction (scanning direction), and a direction of change in the signal potentials written to the pixel electrodes from the source lines varies every two adjacent rows according to the polarities of the signal potentials.Type: ApplicationFiled: June 2, 2010Publication date: August 9, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Etsuo Yamamoto, Shige Furuta, Yuhichiroh Murakami, Seijirou Gyouten
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Publication number: 20120169751Abstract: In an active matrix display apparatus including: pixels provided in a matrix pattern, the pixels each including a memory circuit which retains data while refreshing the data, a data signal electric potential which is supplied from a source line in a period t1 and written to a node which is connected to a liquid capacitor is higher than a data electric potential of the node, the data electric potential being obtained in a period t14 after a refresh operation of the memory circuit.Type: ApplicationFiled: May 18, 2010Publication date: July 5, 2012Applicant: SHARP KABUSHIKI KAISHAInventors: Etsuo Yamamoto, Yasushi Sasaki, Yuhichiroh Murakami, Shige Furuta, Seijirou Gyouten, Shuji Nishi