Nec Corporation

Masahiro Ishigami

Akio Saito

Motoyoshi Komoda

Ikio Yoshida

Tomoko Tsukamoto

A touch panel is provided on the back of a mobile terminal which has a display area and an operation entry part on its front. The mobile terminal is configured to allow a user to press the touch panel with a finger, which supports the mobile terminal on the back thereof, to enter information. Information entry is done by entering the locus of a character or a graphic or by selecting from items displayed on a screen in the display area. In addition, the mobile terminal is configured to allow the user, through the touch panel, to control the scroll of the screen.

Cellular phone allowing a hand-written character to be entered on the back

A data transfer method for reducing the burden on a mobile communication device is disclosed. Phone directory data is stored in a computer. When transferring phone directory data from the computer to a mobile communication device, it is determined whether the processing power of the mobile communication device is large enough to produce desired search tables from the phone directory data. If the processing power is large enough, the phone directory data is sequentially transferred to the mobile communication device. If no such processing power is available, the computer produces the desired search tables and the phone directory data having the desired search tables added thereto is sequentially transferred to the mobile communication device.

Data transfer method and system

A host CPU provides write data corresponding to a color picture to be displayed to a display controller . The display controller includes a mode setter a first and a second register and and a control unit The color picture to be displayed can be reproduced on an LCD by providing read-out data from the display controller in which the write data has been written, to the LCD

Color liquid crystal display and display method thereof

A portable terminal comprises a main body having a front surface and a rear surface opposite to the front surface. The portable terminal comprises a display section formed on the front surface for displaying input information of the portable terminal, a main operating section formed on the front surface for carrying out input operation of said input information, and a touch panel formed on the rear surface for carrying out input operation of the input information. The touch panel is operated by a user with gripping the main body on a hand. The portable terminal monitors the touch panel in a predetermined interval to produce a monitored signal and is responsive to the monitored signal for make the display section display the input information.

Portable telephone device with additional display and data inputting capability

A portable transceiver and an ESN transfer system for a car telephone system. The ESN and the MSN, which are manufacturer-controlled numbers, are stored in an EEPROM mounted on the panel of the portable transceiver. When the panel on which the EEPROM is mounted is to be replaced, only the ESN is transferred to the EEPROM of the new panel. Upon completion of the ESN transfer, the ESN in the EEPROM of the replaced panel is rewritten to data, which would make its specific part, such as the manufacturer's ID number, to be judged 'incorrect'. No ESN whose specific part is 'incorrect' can be transferred. The ESN transfer unit, connected to a connector provided in the casing of the portable transceiver, performs said ESN transfer.

Portable transceiver and ESN transfer system therefor

A system for detecting the malfunction of a CPU (Central Processing Unit) is disclosed. A watchdog timer applies an interrupt signal to the CPU on detecting the malfunction of the CPU. In response to the interrupt signal, the CPU executes interrupt processing to increment the number of times that the CPU has malfunctioned stored in a nonvolatile memory. As the number of times stored in the nonvolatile memory reaches a predetermined value, the CPU displays an alarm message on a display.

System for detecting the malfunction of a CPU including a watchdog timer

The housing of a hand held portable telephone has only a limited amount of surface area for providing a number of functions such as providing for a microphone, a receiver, a ringer, a keypad, an information display panel, a panel light, and a control key. By a reoperation of a control key, some equipment on the surface area is reused to perform a second function without requiring additional surface space.

Telephone having receive call indicating function and mute/light key

A volume control circuit for a portable telephone set has two volume setting circuits. One of these circuits is activated when the telephone is used within a vehicle and the other is activated when the telephone is removed from the vehicle and carried about as a personal telephone. One embodiment selects between these two circuits by operating mechanical structures which are moved between two positions by physically attaching or removing the telephone to or from the vehicle. Another embodiment uses a microprocessor to make the selection responsive to the operation of a magnetically actuated reed switch.

Growing community of inventors

Saitama, Japan

Masahiro Ishigami