Mitsubishi Denki Kabushiki Kaisha

Masaji Ebihara

Kazuo Kobayashi

Yoshinori Adachi

Yasusi Nakato

A personal communication apparatus is disclosed, which comprises a radio transmitter 64 and a radio receiver 66 for participating in communication, a microphone 60, a loudspeaker 61, a processor 90 as a controller for controlling call switching communication and packet switching communication, a ROM 100 and a RAM 101 for storing control programs and data, a call switching modem 80 for modulating signal in the speech frequency band, and a packet switching modem 82 for modulating signal in a frequency band exceeding the speech frequency band. The outputs of the microphone 60 and call switching modem 80 are bandwidth limited by a transmission signal processing circuit 72. Communication by the packet switching modem is carried out according to a communication program. The apparatus is capable of stand alone call switching communication and also of packet switching communication, as well as functioning as a radio telephone set.

Personal communication apparatus with call switching modem and packet

A display-integrated tablet consuming less power and capable of detecting positions only with top (row) electrodes of a matrix panel without using bottom (column) electrodes of the matrix panel with which position detection is difficult. A display-integrated tablet with a matrix panel having top (row) and bottom (column) electrodes, a top-electrode (row-electrode) drive, a bottom-electrode (column-electrode) driver, a top (row) electrode position detecting section, a bottom (column) electrode position detecting section having a memory storing detection voltage levels and x- and y-coordinate values corresponding to a certain number of dot positions on the panel, and a position detecting conductor, and performing display and position detection by means of time division. It is possible to decrease power consumption without supplying scanning pulses simultaneously to many electrodes (e.g. 20 electrodes) because scanning pulses are supplied only to top (row) electrodes to perform position detection in the position detection mode of the display-integrated tablet by using no bottom (column) electrode.

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Kanagawa-ken, Japan

Masaji Ebihara