Hitachi, Ltd.

Takayuki Oouchi

Nobuyasu Kanekawa

Atsuo Watanabe

Yasuyuki Kojima

Shinichiro Mitani

Minehiro Nemoto

Takayuki Iwasaki

Seigoh Yukutake

Katsuhiro Furukawa

Chiyoshi Kamada

Masatsugu Amishiro

Ikuo Hiyama

Makoto Tsumura

Shouichi Hirota

A communication system is provided including a transceiver and an application controller to transmit and receive signals through the transceiver. An isolator which insulates and separates the transceiver and application controller includes primary and secondary side circuits insulated from each other on a substrate and a capacitive insulating means to transfer signals between the primary and second sides while insulating and separating the primary side circuit from the secondary side circuit.

Isolator and a modem device using the isolator

A display unit has a brightness equal to that in a conventional black-and-white reflection type and the power consumption is small at a standby time, and bright color display of high quality can be produced and power consumption is small at the time of use. An information device having this display unit, such as a portable phone, also is provided. The display unit has a color light emitting means, a reflecting mean of external light and a light polarizing state modulating means. The display unit has a driving method switching means for switching color light emitting display and reflection display by on/off control of the light emitting means and switching control of a driving method of a display element.

Color/black-and-white switchable portable terminal and display unit

An isolator is made monolithic by forming a capacitive insulating barrier using an interlayer insulation film on the semiconductor substrate to miniaturize the modem device by the monolithic isolator.

Growing community of inventors

Hitachi, Japan

Takayuki Oouchi