Patents by Inventor Yasushi Sasaki

Yasushi Sasaki 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).

  • Patent number: 8675811
    Abstract: 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: Grant
    Filed: August 20, 2008
    Date of Patent: March 18, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Etsuo Yamamoto, Yasushi Sasaki, Yuhichiroh Murakami, Shige Furuta
  • Patent number: 8665255
    Abstract: An object of the present invention is to provide a power supply circuit including a charge-pumping booster section which uses switching elements provided only by N-channel transistors yet does not have a problem of voltage drop by threshold value. In a booster section (11a), capacitors (C1) and (C2) have their respective first terminals connected with transistors (Q1, Q3) and (Q2, Q4) respectively. Each transistor has its gate terminal supplied with control signals generated in a driver section (11b). The driver section (11b) includes capacitors (C3, C4) connected with input terminals (Ti3, Ti4) for respective supply of clock signals DCK2, DCK2B each having a voltage alternating between ?VDD and VDD (VDD represents an input supply voltage from outside), as level-shifted signals of clock signals DCK1, DCK1B which are supplied to second terminals of the capacitors (C1, C2) respectively.
    Type: Grant
    Filed: July 24, 2008
    Date of Patent: March 4, 2014
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Sachio Tsujino, Shuji Nishi, Yuhichiroh Murakami, Yasushi Sasaki, Seijirou Gyouten
  • Publication number: 20140008978
    Abstract: A power management system has power supplying means, measuring means that measures power generation environment for the power supplying means, and communication means that transmits information measured by the measuring means. The power management system comprises: a control unit that controls the measuring means and the communication means. The power supplying means is used as a power source for the measuring means and the communication means. The control unit sets a first power threshold to be used for determining whether or not to switch operation states of the measuring means and a second power threshold to be used for determining whether or not to switch operation states of the communication means on the basis of a power supply that is supplied from the power supplying means.
    Type: Application
    Filed: March 23, 2012
    Publication date: January 9, 2014
    Applicant: KYOCERA CORPORATION
    Inventors: Yasushi Sasaki, Nobuo Kuchiki, Takashi Baba, Mitsuhiro Kitaji
  • Patent number: 8587572
    Abstract: In a storage capacitor line drive circuit driving a storage capacitor line of an active-matrix display device and driven by outputs of a scanning signal line drive circuit, at least one (VSS) of a high-potential supply voltage (VDD) and a low-potential supply voltage (VSS) differs from a supply voltage (GVSS) of a corresponding logical level of the scanning signal line drive circuit, the high-potential supply voltage and the low-potential supply voltage being used for generating a signal voltage of a preceding stage to an output stage. This makes it possible to achieve a storage capacitor line drive circuit capable of avoiding malfunctioning even in a case where the storage capacitor line drive circuit receives noise from a scanning signal line, and a display device including the storage capacitor line drive circuit.
    Type: Grant
    Filed: August 21, 2008
    Date of Patent: November 19, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Yasushi Sasaki, Yuhichiroh Murakami, Makoto Yokoyama, Shige Furuta
  • Publication number: 20130257846
    Abstract: A memory-type liquid crystal display device includes transistors (N1, N2), retention electrodes (MRY), refresh output control sections (RS1), and capacitors (Cb1). In a data retention period, an electric potential of each of the retention electrodes (MRY) is changed via a corresponding one of the capacitors (Cb1) by changing an electric potential level of a retention capacitor wire signal that is supplied to a corresponding CS line (CSL(i)). Each of the refresh output control sections (RS1) receives the electric potential thus changed of a corresponding one of the retention electrodes (MRY) via the input section and controls an electric potential of a corresponding pixel electrode (PIX) in accordance with the electric potential thus changed.
    Type: Application
    Filed: December 12, 2011
    Publication date: October 3, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Eiji Matsuda, Yasushi Sasaki, Yuhichiroh Murakami, Seijirou Gyouten, Shuji Nishi, Makoto Yokoyama
  • Patent number: 8547368
    Abstract: A display driving circuit of the present invention includes: a source driver (20) which outputs a source signal; a gate driver (30) which outputs a gate signal for turning on a switching element on a row; and a CS driver (40) which outputs a CS signal (CSOUT) whose electric potential is switched in a predetermined direction (low to high or high to low) in accordance with a polarity of the source signal. A CS driver (CSn) on an n-th row outputs a CS signal (CSOUT) to the n-th row in accordance with a gate signal (GLn) for the n-th row outputted from a gate driver (Gn) provided on the n-th row. This makes it possible to provide a display driving circuit which enables CC driving with a simple configuration.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: October 1, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Yokoyama, Yasushi Sasaki, Yuhichiroh Murakami
  • Patent number: 8531443
    Abstract: Provided is a display driving circuit eliminating occurrence of lateral stripes in the first frame from which display corresponding to a video signal is started in CC driving premised on line inversion driving. A source bus line drive circuit outputs a source signal whose polarity is reversed in sync with horizontal scanning period for each row and whose polarity is opposite in an adjacent horizontal scanning period on the same row. A CS bus line drive circuit outputs, after the horizontal scanning period for each row, a CS signal with potential switched along a direction according to polarity of the source signal in the horizontal scanning period concerned. The CS bus line drive circuit outputs the CS signal in a first frame so that potential of the CS signal when the switching element on one row is switched is different from potential of a CS signal on an adjacent row.
    Type: Grant
    Filed: June 22, 2009
    Date of Patent: September 10, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Takayuki Yanagawa, Atsushi Okada, Yasushi Sasaki
  • Publication number: 20130194033
    Abstract: 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: Application
    Filed: August 31, 2011
    Publication date: August 1, 2013
    Inventors: Yuhichiroh Murakami, Yasushi Sasaki, Etsuo Yamamoto
  • Patent number: 8493312
    Abstract: In one embodiment of the present invention, a unit circuit of a shift register includes a bootstrap circuit configured with a transistor T1, a transistor T2 and a capacitor, a transistor T3, a transistor T4, and a reset signal generation circuit. By use of two-phase clock signals and whose high level periods do not overlap with each other, the reset signal generation circuit generates a reset signal which is at a high level in a normal state and changes to a low level when an input signal turns into the high level. During a period that the reset signal is at the high level, transistors T3 and T4 perform discharge of a node and pull-down of an output signal. Thus, it is possible to obtain a power-saving shift register that fixes an output signal at a low level in a normal state without allowing a through current to flow therein.
    Type: Grant
    Filed: August 10, 2012
    Date of Patent: July 23, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Shige Furuta, Yuhichiroh Murakami, Yasushi Sasaki, Shinsaku Shimizu
  • Publication number: 20130169319
    Abstract: 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: Application
    Filed: August 31, 2011
    Publication date: July 4, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
  • Publication number: 20130153941
    Abstract: 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: Application
    Filed: August 26, 2011
    Publication date: June 20, 2013
    Inventors: Osamu Sasaki, Yuhichiroh Murakami, Yasushi Sasaki, Etsuo Yamamoto
  • Publication number: 20130156148
    Abstract: 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 initializat
    Type: Application
    Filed: August 31, 2011
    Publication date: June 20, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
  • Publication number: 20130154374
    Abstract: 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: Application
    Filed: August 31, 2011
    Publication date: June 20, 2013
    Inventors: Yuhichiroh Murakami, Yasushi Sasaki, Etsuo Yamamoto
  • Publication number: 20130155044
    Abstract: 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: Application
    Filed: August 30, 2011
    Publication date: June 20, 2013
    Inventors: Hiroyuki Ohkawa, Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
  • Publication number: 20130151961
    Abstract: In order to enable an operator to unfailingly recognize a retrieved character string displayed on a display unit as a result of retrieval from a target such as text, a character string retrieval apparatus 1 for retrieving the character string from the target includes a display unit 20 for displaying a retrieval result of the character string, an operation unit 30 for detecting an input operation, a tactile sensation providing unit 40 for vibrating the operation unit 30, and a control unit 10 for shifting an area of the retrieval result of the character string displayed on the display unit 20, based on the input operation detected by the operation unit 30, and, when displaying the retrieved character string on the display unit 20, for controlling the tactile sensation providing unit 40 such that a tactile sensation is provided to an object pressing the operation unit 30.
    Type: Application
    Filed: August 26, 2011
    Publication date: June 13, 2013
    Applicant: KYOCERA CORPORATION
    Inventor: Yasushi Sasaki
  • Publication number: 20130147524
    Abstract: 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: Application
    Filed: September 1, 2011
    Publication date: June 13, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Takuya Hachida, Yasushi Sasaki, Yuhichiroh Murakami, Etsuo Yamamoto
  • Patent number: 8460734
    Abstract: An object of the present invention is to provide a method for enhancing the emulsification ability of gum arabic. The present invention can provide a modified gum arabic having an excellent emulsification ability without coloration and/or unpleasant odor, by a method which has a step of making unheated gum arabic into an aqueous solution having a concentration of not higher than 50 mass %, and a step of maintaining the aqueous solution below 60° C. for at least 6 hours. The gum arabic modified by the method of the present invention can be used as an emulsifier for use with beverages, confectioneries, chewing gums, oil-soluble flavors, oil-soluble colors, oil-soluble vitamins, etc.
    Type: Grant
    Filed: March 24, 2005
    Date of Patent: June 11, 2013
    Assignee: San-EI Gen F.F.I., Inc.
    Inventors: Makoto Sakata, Tsuyoshi Katayama, Takeshi Ogasawara, Yasushi Sasaki
  • Patent number: 8457272
    Abstract: At least one embodiment the present invention a plurality of unit circuits connected in multiple stages, to normal operation when the unit circuits are simultaneously turned on to output high-level output signals. When a shift register malfunctions, so that output signals provided by previous- and subsequent-stage unit circuits are simultaneously set to high level, malfunction restoration circuits and included in a unit circuit detect the malfunction in at least one embodiment. The malfunction restoration circuit provides a high voltage to a node, thereby forcibly pulling down an output signal. Also, the malfunction restoration circuit forcibly discharges another node, so that a charge accumulated in a capacitance is released. As a result, the shift register in malfunction can be instantaneously restored to normal operation. At least one embodiment of the present invention is suitable for driver circuits or suchlike of display devices and imaging devices.
    Type: Grant
    Filed: August 26, 2008
    Date of Patent: June 4, 2013
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Makoto Yokoyama, Shige Furuta, Yuhichiroh Murakami, Yasushi Sasaki
  • Publication number: 20130100378
    Abstract: Provided is a liquid crystal display device that has excellent visibility while using a protective film comprising a polyester film. The liquid crystal display device comprises a backlight light source, and a liquid crystal cell disposed between two polarizers; the backlight light source being a white light-emitting diode; each of the polarizers comprising a polarizing film and protective films laminated on both sides of the polarizing film; and at least one of the protective films being a polyester film having a retardation of 3,000 to 30,000 nm.
    Type: Application
    Filed: June 20, 2011
    Publication date: April 25, 2013
    Applicant: TOYOBO CO., LTD.
    Inventors: Koichi Murata, Yasushi Sasaki
  • Publication number: 20130100105
    Abstract: A signal generator circuit of the present invention is a signal generator circuit for use in a display device, the display device including (a) a pixel having a pixel electrode, (b) an electric conductor with which the pixel electrode forms a capacitor, (c) a data signal line driving circuit which outputs a data signal whose polarity is reversed for each n horizontal scanning period(s), where n is a natural number, and (d) a scanning signal line driving circuit which outputs scanning signals corresponding to respective stages, said signal generator circuit generating a drive signal supplied to the electric conductor, wherein: said signal generator circuit comprises flip flops corresponding to the respective stages, each flip flop including a gate circuit and a latch circuit; and in regard to one flip flop corresponding to one of the stages, (i) the gate circuit is supplied with a signal synchronized with a scanning signal corresponding to a preceding stage of the one of the stages, and a signal synchronized w
    Type: Application
    Filed: June 23, 2011
    Publication date: April 25, 2013
    Applicant: Sharp Kabushiki Kaisha
    Inventors: Shige Furuta, Makoto Yokoyama, Yuhichiroh Murakami, Yasushi Sasaki