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Daio, JP
Fumio Daio, Osaka-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100017610 | Authentication system - An authentication system determines if a counterfeit ineligible unit is installed in a main device. When connected with a battery pack, a notebook PC generates and combines a random number and a function determination signal using a signal combining unit and transmits same to the battery pack. A first function calculation unit calculates the function of the random number. The battery pack has a signal separation unit to separate the combined signal into the random number and function determination signal, and a second function calculation unit to calculate the function of the random number for transmitting back to the notebook PC. A comparison unit compares the calculation results by the first and second function calculation units to determine whether the connected battery pack is an authorized one and denies connection if the pack is an unauthorized one. | 01-21-2010 |
| 20100017611 | Authentication system - An authentication system determines if a counterfeit ineligible unit is installed in a main device. When connected with a battery pack, a notebook PC generates and combines a random number and a function determination signal using a signal combining unit and transmits same to the battery pack. A first function calculation unit calculates the function of the random number. The battery pack has a signal separation unit to separate the combined signal into the random number and function determination signal, and a second function calculation unit to calculate the function of the random number for transmitting back to the notebook PC. A comparison unit compares the calculation results by the first and second function calculation units to determine whether the connected battery pack is an authorized one and denies connection if the pack is an unauthorized one. | 01-21-2010 |
| 20100024002 | Authentication system - An authentication system determines if a counterfeit ineligible unit is installed in a main device. When connected with a battery pack, a notebook PC generates and combines a random number and a function determination signal using a signal combining unit and transmits same to the battery pack. A first function calculation unit calculates the function of the random number. The battery pack has a signal separation unit to separate the combined signal into the random number and function determination signal, and a second function calculation unit to calculate the function of the random number for transmitting back to the notebook PC. A comparison unit compares the calculation results by the first and second function calculation units to determine whether the connected battery pack is an authorized one and denies connection if the pack is an unauthorized one. | 01-28-2010 |
Katsuhisa Daio, Kagoshima JP
| Patent application number | Description | Published |
|---|---|---|
| 20090072908 | GAIN CONTROL CIRCUIT AND OPTICAL RECORDING AND REPRODUCING DEVICE USING THEREOF - A gain control circuit to determine gain by a current ratio of mutual conductance. The gain control circuit includes a first gain control circuit in which positive and negative phase input signals are supplied, gain is changed based on a first control signal, and positive and negative phase output signals are outputted, a second gain control circuit in which the positive and negative phase input signals are supplied, gain is changed based on a second control signal, and the positive and negative phase output signals are outputted, and a load circuit in which the positive phase output signal of the first gain control circuit and the negative phase output signal of the second gain control circuit are synthesized and supplied to a first input terminal, and the negative phase output signal of the first gain control circuit and the positive phase output signal of the second gain control circuit are synthesized and supplied to a second input terminal, and the synthesized signals are lead out through mutual conductance. | 03-19-2009 |
| 20100260219 | Laser drive - Disclosed herein is a laser driver including a light emission controlling section configured to stop generation of a control voltage by a control voltage generating section, causing a given voltage corresponding to a magnitude of a reference current to be outputted to an input node of a first emitter follower to operate the first emitter follower for a first time period from start of a light emission time period, release stop of the generation of the control voltage by the control voltage generating section, causing the control voltage to be outputted to the input node of the first emitter follower to operate the first emitter follower until end of the light emission time period of the laser, and operate a second emitter follower to discharge electric charges accumulated in the laser for a second time period after the end of the light emission time period of the laser. | 10-14-2010 |
| 20110075691 | Correction circuit, drive circuit, light emitting device, and method of correcting current pulse waveform - A correction circuit is provided, which may reduce dullness of a light output waveform due to wavelength detuning. The correction circuit includes an RC time constant circuit. The RC time constant circuit is used to correct a waveform of a current pulse outputted from a current source, the current source driving a surface-emitting semiconductor laser in a pulsed manner, so that a pulse waveform of light output of the semiconductor laser is approximately a rectangle. | 03-31-2011 |
Kinya Daio, Kyoto JP
| Patent application number | Description | Published |
|---|---|---|
| 20080309378 | SEMICONDUCTOR DEVICE - A semiconductor device | 12-18-2008 |
| 20090161813 | SEMICONDUCTOR DEVICE - In a semiconductor device including an N-line M-stage shift register circuit operated at high speed of, for example, several hundreds MHz. Input circuits input a common test pattern to each of pairs of shift registers in, for example, two lines out of the N lines. A plurality of outputs of the pairs of shift registers in the two lines are compared in comparators, and the comparison results are output. The N-line M-stage shift register circuit and the comparators are operated in synchronization with a clock signal at several hundreds MHz. Hence, even when the circuit scale (area) of the N-line M-stage shift register circuit is increased to involve apparent wiring delay, a defect in the shift register circuit can be detected at an actual speed. | 06-25-2009 |
Masayuki Daio, Hiroshima JP
| Patent application number | Description | Published |
|---|---|---|
| 20090183435 | Vehicle door sash molding end retention structure - A weatherstrip and a sash molding are attached along a door sash. A hard material clip is insert-molded in the die-molded part at the end of the weatherstrip. The clip has a latch protruding from the die-molded part. An end cap die-molded at the sash molding end has an engaging part. The engaging part engages with the latch to retain the sash molding end. | 07-23-2009 |
| 20100096889 | Sunroof Apparatus - A sunroof apparatus for opening or closing an opening formed on a fixed roof of an automobile includes: a movable front panel and a movable rear panel both provided in the fixed roof; a panel frame made of engineering plastic and attached around one of the panels; a hollow elastic weatherstrip attached around the panel frame attached around the one of the panels; a panel frame made of the engineering plastic and attached on a periphery end section of other one of the panels, the other one of the panels having a butt end section and the periphery end section; and a hollow elastic weatherstrip attached to the panel frame attached to the other one of the panels, wherein the opening is closed when the weatherstrip of the one of the panels and the butt end section of the other one of the panels butt against each other. This structure can enhance efficiency in molding weatherstrips since the weatherstrip attached around the two panels are in a hollow structure. | 04-22-2010 |
Mitsuaki Daio, Kyoto-Shi JP
| Patent application number | Description | Published |
|---|---|---|
| 20100224761 | LIGHT RECEIVING DETECTION CIRCUIT - A light receiving detection circuit has a light receiving element configured to receive light emitted from a corresponding projection element, a current/voltage conversion circuit that converts a current signal passing through the light receiving element into a voltage signal, and a filter portion that has a plurality of stages. The filter portion has a high-pass filter and an amplifying circuit. The high-pass filter is able to be switched such that a time constant of the high-pass filter increases when the light receiving element receives light emitted by the corresponding projection element such that the time constant decreases when other projection elements except for the corresponding projection element emit the light. | 09-09-2010 |
Mitsuaki Daio, Kyoto JP
| Patent application number | Description | Published |
|---|---|---|
| 20080225456 | Overcurrent Protecting Circuit, Motor Drive Circuit, and Semiconductor Device - An over-current protection circuit of a semiconductor circuit including a power transistor for outputting current output, a first output current detection circuit and a current limiter circuit for limiting the output current by stopping the output current of the power transistor for a predetermined period in response to a first detection signal from the output current detection circuit when the output current of the power transistor reaches a predetermined limit value. The over-current protection circuit has an output current detection transistor current-mirror connected to the power transistor and a second output current detection circuit for generating a second detection signal according to an output current of the output current detection transistor when the output current reaches the predetermined limit value. Further, the output current of the power transistor is cut off for the predetermined period by operating the current limiter circuit in response to the second detection signal. | 09-18-2008 |
| 20090190280 | Current limiter circuit and motor drive circuit - A current limiter circuit in an IC having a power transistor and an output current detection circuit connected in series with the power transistor. A comparator, a first reference voltage generator circuit and a second reference voltage generator circuit are also included in the current limiter circuit. The comparator generates a control signal for stopping a drive of the power transistor for a predetermined time. The comparator generates the control signal according to a detection signal obtained by the output current detection circuit and a second reference voltage obtained by the second reference voltage generator circuit when the output current of the power transistor reaches a predetermined value larger than the predetermined limit value. The first reference voltage generator circuit is provided externally of the IC and the second reference voltage generator circuit is included within the IC. | 07-30-2009 |