Patents by Inventor Hideo Hamaguchi
Hideo Hamaguchi 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: 7439936Abstract: A display panel control circuit includes a voltage controlled oscillator (VCO) for outputting a clock signal, a first-panel horizontal system pulse generation section, a second-panel horizontal system pulse generation section, a vertical system pulse generation section which is commonly used among the first and second panels, a phase comparator, and a smoothing element. The first-panel horizontal system pulse generation section and the second-panel horizontal system pulse generation section respectively generate a reference signal of a first-panel horizontal system output group and a reference signal of a second-panel horizontal system output group from signal VCOCLK1 output from the VCO. Thus, it is possible to simultaneously drive two different panels.Type: GrantFiled: November 24, 2004Date of Patent: October 21, 2008Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Norihide Kinugasa, Yoshio Nirasawa, Hideo Hamaguchi, Sachi Ota
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Patent number: 7262646Abstract: A power-on reset circuit of the present invention comprises: a first p-channel MOS transistor having the gate and the drain which are grounded and having a substrate which is connected to a power supply; a first resistor which is inserted and connected between the above-mentioned power supply and the source of the above-mentioned first p-channel MOS transistor; a first inverter having an input terminal which is connected to the source of the first p-channel MOS transistor; and a power-on reset signal output terminal which is connected to an output terminal of the first inverter.Type: GrantFiled: July 15, 2004Date of Patent: August 28, 2007Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Norihide Kinugasa, Yoshio Nirasawa, Hideo Hamaguchi
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Patent number: 7064945Abstract: An output circuit may include a power supply terminal, a ground terminal, and an output terminal connected to a capacitive load. Depending on the state of a load control input signal, the output circuit performs selectively a charging-current supplying operation of supplying a charging-current from the power supply terminal to the capacitive load and a discharging-current withdrawing operation of withdrawing a discharging-current from the capacitive load to the ground terminal. An overcharging-current prevention switch is provided to detect a short circuit between the output terminal and the ground terminal so as to stop or suppress the charging-current supplying operation. An overdischarging-current prevention switch is provided to detect a short circuit between the output terminal and the power supply terminal so as to stop or suppress the discharging-current withdrawing operation.Type: GrantFiled: December 8, 2003Date of Patent: June 20, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuji Amano, Yoshio Nirasawa, Hideo Hamaguchi
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Patent number: 7049867Abstract: A PLL circuit that makes a voltage-controlled oscillator converge to a stable state within a short time and generates a clock signal with high stability even when discontinuity occurs in the period of a reference input signal is provided. The PLL circuit has a voltage-controlled oscillator for outputting a clock controlled, a first counter reset by the reference input signal having one period longer than a reference period within a predetermined period for outputting a first signal, a second counter for outputting a second signal, a reset pulse generating circuit for resetting the second counter, a loop filter for holding and outputting the control voltage varied by a phase error signal and a discontinuous input detecting part for detecting the reference input signal input initially after its period becomes longer than the reference period.Type: GrantFiled: August 11, 2004Date of Patent: May 23, 2006Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Norihide Kinugasa, Yoshio Nirasawa, Hideo Hamaguchi, Sachi Ota
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Publication number: 20050156812Abstract: A display panel control circuit includes a voltage controlled oscillator (VCO) for outputting a clock signal, a first-panel horizontal system pulse generation section, a second-panel horizontal system pulse generation section, a vertical system pulse generation section which is commonly used among the first and second panels, a phase comparator, and a smoothing element. The first-panel horizontal system pulse generation section and the second-panel horizontal system pulse generation section respectively generate a reference signal of a first-panel horizontal system output group and a reference signal of a second-panel horizontal system output group from signal VCOCLK1 output from the VCO. Thus, it is possible to simultaneously drive two different panels.Type: ApplicationFiled: November 24, 2004Publication date: July 21, 2005Inventors: Norihide Kinugasa, Yoshio Nirasawa, Hideo Hamaguchi, Sachi Ota
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Publication number: 20050040872Abstract: The present invention provides a PLL circuit that makes a voltage-controlled oscillator converge to a stable state within a short time and generates a clock signal with high stability even when discontinuity occurs in the period of a reference input signal. The PLL circuit of the present invention has a voltage-controlled oscillator for outputting a clock controlled, a first counter reset by the reference input signal having one period longer than a reference period within a predetermined period for outputting a first signal, a second counter for outputting a second signal, a reset pulse generating circuit for resetting the second counter, a loop filter for holding and outputting the control voltage varied by a phase error signal and a discontinuous input detecting part for detecting the reference input signal input initially after its period becomes longer than the reference period.Type: ApplicationFiled: August 11, 2004Publication date: February 24, 2005Inventors: Norihide Kinugasa, Yoshio Nirasawa, Hideo Hamaguchi, Sachi Ota
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Publication number: 20050012531Abstract: A power-on reset circuit of the present invention comprises: a first p-channel MOS transistor having the gate and the drain which are grounded and having a substrate which is connected to a power supply; a first resistor which is inserted and connected between the above-mentioned power supply and the source of the above-mentioned first p-channel MOS transistor; a first inverter having an input terminal which is connected to the source of the first p-channel MOS transistor; and a power-on reset signal output terminal which is connected to an output terminal of the first inverter.Type: ApplicationFiled: July 15, 2004Publication date: January 20, 2005Inventors: Norihide Kinugasa, Yoshio Nirasawa, Hideo Hamaguchi
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Publication number: 20040169980Abstract: An overcurrent is prevented from flowing in an output circuit when a short circuit occurs between an output terminal and a power supply terminal or a ground terminal. For this purpose, provided is an output circuit comprising a power supply terminal, a ground terminal, and an output terminal connected to a capacitive load. Depending on the state of a load control input signal, the output circuit performs selectively a charging-current supplying operation of supplying a charging-current from the power supply terminal to the capacitive load and a discharging-current withdrawing operation of withdrawing a discharging-current from the capacitive load to the ground terminal. Further, an overcharging-current prevention switch is provided for detecting a short circuit between the output terminal and the ground terminal so as to stop or suppress the charging-current supplying operation.Type: ApplicationFiled: December 8, 2003Publication date: September 2, 2004Inventors: Yuji Amano, Yoshio Nirasawa, Hideo Hamaguchi
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Patent number: 5323098Abstract: A power-charging system for a transporter cart is disclosed. The system includes a power-supplying electrode disposed along and at a predetermined section of a travelling passage along which the transporter cart automatically runs by power from a battery mounted thereon and a power-receiving electrode attached to the transporter cart and a slide-contactable with the power-supplying electrode during the automatic run of the cart.Type: GrantFiled: August 15, 1991Date of Patent: June 21, 1994Assignee: Daifuku Co., Ltd.Inventors: Hideo Hamaguchi, Hideichi Tanizawa, Shigeyoshi Nishihara