Fujitsu Corporation

Fujitsu Semiconductor Limited

Fujitsu Microelectronics Limited

Clarion Co

Renesas Electronics Corporation

Fujitsu Ten Limited

Fujitsu Vlsi Limited

Nissho Corporation

Vlsi Technology Research Association

Fijitsu Limited

Fujitsu Vsli Limited

Takashi Matsumoto

Kyuichi Takimoto

Akira Haraguchi

Hidekiyo Ozawa

Yoshiaki Sano

Ryuta Nagai

Morihito Hasegawa

Masatoshi Kokubun

Seiya Kitagawa

Toshiyuki Matsuyama

Atsushi Shimizu

Hidetoshi Yano

Mitsuo Saeki

Norio Yagi

Yasushi Nagai

Yoshihiro Nagaya

Kenichi Myokan

Takashi Yamaguchi

Tatsuaki Osafune

Toshio Hanazawa

Hiroyoshi Endo

Takahiro Yoshino

Takayuki Hirota

Tetsuya Hori

Ryo Shimizu

Hirofumi Dogome

Masaharu Matsumoto

Susumu Kojima

Yuji Oohara

Katuhiko Oizumi

Koichi Mitsui

Hidenobu Ito

Kazuhiko Takaishi

Chikara Tsuchiya

Motoo Nakano

Yoshihiko Nakamura

Yuki Kondoh

Hiroshi Okada

Katsuyuki Yasukouchi

Katsuyuki Umezawa

Tsutomu Ogawa

Toru Nojiri

Haruhisa Mori

Takeshi Uehara

Takehito Doi

Shigehiko Yazawa

Hiroshi Ozawa

Koichi Inatomi

Toru Nakamura

Kunihiro Shimada

Mayo Kitano

Kazutoshi Motohashi

Keisuke Toyama

Takahito Wakabayashi

Shoji Tajiri

Motohiro Fuji

Yukinori Maekawa

Kiminori Nakamura

Yoshiharu Kano

Hideaki Kamezawa

Takahiro Nawata

Keita Sekine

Katsuyuki Yasukouti

Kazushige Haruta

Susumu Fujihara

Yasuhide Katagase

Yukinori Fujimura

Takehiko Katoh

In a system in which an in-vehicle apparatus and a smartphone are connected to each other, screen display switching cannot be performed with priorities of all the applications taken into account as respective terminals carry applications. A management block is provided in an in-vehicle apparatus or in a smartphone. The management block holds priority definitions for starting and displaying applications on both terminals. In response to external input to both terminals, the management block selects the application to be started and displayed. The management block identifies the terminal carrying the selected application, and transmits to the identified terminal a request to start the application and to switch display output accordingly.

In-vehicle apparatus and display control system for the same

[Objective] When installing software into an in-vehicle terminal from a server, it is required to prevent the software from being installed into an unsuitable terminal, and to reduce time and efforts for data input and download, thereby improving the convenience of the user. [Solution] In an information distribution system, terminal identification information and a terminal unique key for an in-vehicle terminal are stored in a server as well as in itself. The in-vehicle terminal transmits the terminal identification information to the server for terminal authentication via a communication terminal after encrypting with the terminal unique key, and then the server transmits encrypted software to the communication terminal. The communication terminal transmits the encrypted software to the in-vehicle terminal, which in turn obtains a software unique key encrypted with the terminal unique key from the server and decrypts the encrypted software for installation using the software unique key.

Information distribution method, information distribution system and in-vehicle terminal

An input/output limitation information storage unit stores input/output limitation information in which limitation processing for limiting operation input to the application and display output from the application is prescribed by associating the limitation processing with the application. A determination unit acquires a vehicle state of a vehicle, and determines the limitation processing to be applied to the operation input to the application and the display output from the application on the basis of the application running on the terminal device, the vehicle state, and the input/output limitation information. The limitation unit performs the limitation processing determined by the determination unit for the operation input detected by the input control unit and transmitted to the communication control unit, and the display output received by the communication control unit and transmitted to the output control unit.

In-vehicle device, control method thereof, and remote control system

There is provided an electronic device which includes a display device, a case configured to retain the display device, a stopper disposed between the retained display device and the case, and a component arranged in a space formed by disposing the stopper. Further, there is provided an electronic device which includes a display device, a case including a first space for retaining the display device, the display device being operable to be slid into the first space, a stopper disposed in a second space between the retained display device and the case, and an electronic device arranged in a third space formed by arranging the stopper.

Electronic device and communication device

A data processor includes: a central processing unit (CPU), in which a plurality of virtual machines (), each running an application program under controls of different operating systems, and a virtual machine manager () for controlling the plurality of virtual machines are selectively arranged according to information set in mode registers (); and a resource access management module () for managing access to hardware resource available for the plurality of virtual machines. The resource access management module accepts, as inputs, the information set in the mode registers and access control information of the central processing unit to the hardware resource, compares the information thus input with information set in a control register, and controls whether or not to permit access to the hardware resource in response to the access control information. As a result, redesign involved in changes in system specifications can be reduced, and a malfunction owing to resource contention can be prevented. The invention contributes to increase of security.

Data processor with virtual machine management

A apparatus for processing EPG information that EPG (Electronic Program Guide) information can be read prior to display independently of an operation by an input device. The EPG information processing apparatus controls the amount of EPG information stored in a database prior to display so that the speed of acquiring EPG information and the speed of supplying EPG information indicating the frequency of using an acquired electronic program guide are kept in a predetermined relation. In response to a direction for updating an on-display electronic program guide, the EPG processing apparatus supplies new EPG information, and stores another piece of EPG information associated with the EPG information in the database prior to next display. The amount of information stored in the database in advance is decided so that the acquiring speed and supplying speed can be kept in a predetermined relation. Therefore, the amount of information stored in advance is raised with increase in the frequency of using an electronic program guide in correlation with the acquired supplying speed, and the amount of information stored in advance is decreased with decrease in the using frequency.

Apparatus for processing electronic program guide information, system for receiving digital broadcasts, and method for processing program information

A voltage control method includes producing an error signal based on a difference between a reference signal and an adaptor voltage and an adaptor current corresponding to the adaptor voltage, regulating, based on the error signal, the adaptor voltage, comparing a reference voltage to a voltage proportional to a potential corresponding to an identifying voltage corresponding to the adaptor voltage, detecting, based on the comparison result, whether or not a couplable external power source is suitable, and setting based, on the detection result, a potential corresponding to the identifying voltage.

Electronic device, detection circuit and voltage control method

A detection circuit that reduces circuit scale. A plurality of current amplifiers respectively generate a plurality of detection signals corresponding to current flowing to a plurality of resistors. An error amplifier coupled to the plurality of current amplifiers compares the plurality of detection signals with a plurality of reference signals, respectively, to generate an error signal based on the comparison.

Detection circuit

To provide a control circuit and control method of a step-up/step-down type DC-DC converter capable of realizing high efficiency. In a state (), a terminal Tx of a choke coil Lis connected to an input terminal Tin, and a terminal Ty is connected to a reference potential. In a state (), the terminal Tx is connected to the reference potential, and the terminal Ty is connected to an output terminal Tout. In the state (), the terminal Tx is connected to the input terminal Tin, and the terminal Ty is connected to the output terminal Tout. A first period operation TOis constituted by the states () and (), and a second period operation TOis constituted by the states () and (). A second period T, in which the second period operation TOis performed, is a value n times as long as a first period T, in which the first period operation TOis performed. In the second period operation TO, the state () is switched to the state () so that an increasing slope of an inductor current IL is reduced.

Step-up/step-down type DC-DC converter, and control circuit and control method of the same

A first power supply line and having a first conductivity type a second transistor coupled between the first transistor and a second power supply line, and having the first conductivity type an output unit driving a first control signal causing the first transistor to become conductive, based on a drive voltage, and outputting the first control signal to the first transistor and a boot strap circuit including a capacitor having a first end coupled to a node of the first transistor and the second transistor and supplying the output unit with the drive voltage based on the capacitor, wherein an electric potential of the first end is reduced before the first transistor becomes conductive.

DC-DC converter and control method thereof

According to one aspect of the invention, a DC-DC converter including a soft-start function of a soft start in response to a soft-start signal, comprises: a detection circuit that detects whether the soft-start signal is active at an end of a soft-start operation; and an output voltage control circuit that controls an output voltage based on detection result of the detection circuit.

DC-DC converter, power supply voltage supplying method, and power supply voltage supplying system

A detection circuit for generating a control signal for controlling output voltage of an AC adapter. The detection circuit for an electronic device receives power information from an external power supply via a cable to generate the control signal that controls DC input voltage output from the external power supply. In the detection circuit, a correction voltage generation circuit generates a correction voltage in correspondence with the parasitic resistance of the cable. A power information correction circuit corrects the power information provided from the external power supply via the cable with the correction voltage to generate corrected power information. A detection signal generation circuit calculates the total power amount of the electronic device and generates a power detection signal corresponding to the total power amount. The control signal generation circuit generates the control signal based on the corrected power information and the power detection signal.

To provide a control circuit for a synchronous rectifier-type DC-DC converter, a synchronous rectifier-type DC-DC converter and a control method thereof in which, in a light load state and a no-load state, an output voltage can be dropped to thus prevent an overshoot state from continuing. A synchronous rectifier-type DC-DC converterand a control circuitA thereof comprising a first switching element FETthat is made conductive when power is accumulated in an induction element L, and a second switching element FETthat is made conductive when power accumulated in induction element Lis supplied to a load, also comprises a detecting unit COMPthat detects that a value of an output voltage VOUT of the synchronous rectifier-type DC-DC converterA is a predetermined voltage value that is higher than a target voltage value, and control units COMPand ORthat maintain the second switching element FETin a conductive state after discharge of the power accumulated in the induction element Lis finished, based on the detection results of the detecting unit COMP

Control circuit for synchronous rectifier-type DC-DC converter, synchronous rectifier-type DC-DC converter and control method thereof

A charge/discharge control circuit for controlling charging and discharging of a secondary battery that includes a cell. The charge/discharge control circuit includes an overdischarge detection circuit for detecting an overdischarged state of the battery, and an overcharge detection circuit for detecting an overcharged state of the battery. A discharge control switch is deactivated in the overdischarged state. A first charge control switch is deactivated in the overdischarged state. A second charge control switch is activated in the overdischarged state. A current-limiting circuit is connected in series with the second charge control switch for limiting the charging current when charging is performed.

Charge/discharge control circuit and secondary battery

Growing community of inventors

Kasugai, Japan

Takashi Matsumoto