Nec Corporation

Nec Platforms, Ltd.

Yazaki Corporation

Komatsu Electronic Metals Co., Ltd.

Synaptics Japan Gk

Komatsu Plastics Industrial Co., Ltd.

Jun Uchida

Makoto Shima

Hiroshi Toyao

Masanori Onuma

Tadahisa Sakaguchi

Masakuni Samejima

Kazuhiro Kudoh

Naoki Yamada

Isanori Shimizu

Kiichi Makuta

Ryoh Itoh

Yoshinori Ura

Keita Tsubakino

Toshikazu Arai

Tamio Suzuki

Mitsuo Terada

Kiyoshi Nishizawa

Three elements of a first (¼) wavelength element and a second (¼) wavelength element which have a length of (¼) wavelength at an arbitrary frequency designated in advance and a half-wavelength element which has a length of a half-wavelength at the arbitrary frequency are arranged in a three-orthogonal state where those are orthogonal to each other, one end portion of the first (¼) wavelength element is joined to one end portion of the second (¼) wavelength element, another end portion of the second (¼) wavelength element is joined to one end portion of the half-wavelength element, a feeding point for antenna power feeding is arranged in a position in which the one end portion of the first (¼) wavelength element is joined to the one end portion of the second (¼) wavelength element, and an antenna is formed as a one-wavelength twisted Z-shaped three-orthogonal dipole antenna.

Antenna, wireless communication device, and antenna forming method

In order to provide an antenna that is small and resonates at a plurality of frequencies, an antenna according to the present invention is provided with: a first conductor of a ring shape, having an air gap; a second conductor arranged inside the ring, with both ends of the second conductor connected to the first conductor, having a first gap; and a third conductor arranged in a region surrounded by a part not including the air gap out of the first conductor, and the second conductor, with both ends connected to the first conductor, having a second gap, and a value obtained by multiplying a length of an outer periphery of a region surrounded by a part including the air gap out of the first conductor, and the third conductor, by capacitance of the air gap is different from a value obtained by multiplying a length of an outer periphery of a region surrounded by the second conductor, the third conductor, and the first conductor, by capacitance of the first gap.

Antenna and wireless communication apparatus

An antenna () includes: a first radiant element () and a second radiant element (), which are connected to an antenna feeding point (); a first branch part (), one end of which is connected to the first radiant element () at a position not corresponding to an end portion of the first radiant element (); a second branch part (), one end of which is connected to the second radiant element () at a position not corresponding to an end portion of the second radiant element (); and a connection element (), which connects part of the first radiant element () and part of the second radiant element (). A different end of the first branch part () and a different end of the second branch part () face each other and form a capacitor part. The capacitor part is positioned outside the area surrounded by the connection element (), the first radiant element (), and the second radiant element (). Part of the first radiant element (), part of the second radiant element (), the first branch part (), the second branch part (), and the capacitor part form a split ring resonator ().

Antenna, printed circuit board, and wireless communication device

A split section () has an auxiliary conductor pattern () formed on one end of a substantially C-shaped section of a first split-ring section, and a split () formed between the auxiliary conductor pattern () and the other end of the substantially C-shaped section. A split section () has an auxiliary conductor pattern () formed on one end of a substantially C-shaped section of a second split-ring section, and a split () formed between the auxiliary conductor pattern () and the other end of the substantially C-shaped section. The auxiliary conductor pattern () is formed so as to face the auxiliary conductor pattern (). The split () is formed so as to be opposite from the position facing the split () and consequently sandwich the auxiliary conductor pattern () therebetween. A split () is formed between the auxiliary conductor pattern () and the auxiliary conductor pattern (), stores electrical charges having different polarity, and functions as a large-capacity capacitor. As a result, it is possible to inexpensively produce a compact antenna and electric device.

Antenna and electronic device

A display drive circuit includes: source amplifiers capable of driving source lines of a display panel connected thereto; preamplifiers capable of outputting first gradation voltages; source circuits each including a division of the source amplifiers, provided that the source amplifiers are divided equally; and resistance arrays. Each source circuit is provided with one of the resistance arrays. Each resistance array divides input first gradation voltages to generate second gradation voltages and provides them to the corresponding source circuit. The worsening of the capability of converging of gradation lines for supplying second gradation voltages to the source circuits can be suppressed without providing gradation-voltage-generation circuits even with a display driver IC having an increased long side length, or more than one display driver IC provided.

Display drive circuit and display device

The present invention enables to restrain the enlargement of the wireless communication apparatus and prevent the manufacturing processes from increasing and to increase the frequency bands which can be used by the wireless communication. An antennaincludes a first ground pattern, a second ground pattern, a hinge conductor memberand a current control circuit. The first ground patternis formed on a first printed wiring board. The hinge conductor memberis arranged on a hinge Z which connects indirectly the first printed wiring boardand a second printed wiring boardeach other. The current control circuitis arranged on the first printed wiring board. The current control circuithas a function to flow the electric current of a first frequency band and attenuate the electric current of a second frequency band. An electric current of the first frequency band flows from a feeding sourceto the second ground patternand flows into the first ground patternthrough the hinge conductor memberand the current control circuit. A part, on which the electric current of the first frequency band flows, functions as an antenna which communicate the signal of the first frequency band. An electric current of the second frequency band flows from the feeding sourceto the second ground patternand flows until reaching the current control circuitthrough the hinge conductor member. A part, on which the electric current of the second frequency band flows, functions as an antenna which communicate the signal of the second frequency band.

Antenna, wireless communication apparatus and method of configuring antenna

A terminal fitting includes first and second terminal fitting components. The first terminal fitting component includes a first flat plate having a through hole and caulking pieces. The caulking pieces stand up from both edges in the width direction of the first flat plate. The second terminal fitting component includes a second flat plate having a projection. The projection is inserted in the through hole, an end part of the projection is crushed, and the second flat plate is caulked with the caulking pieces so that the first and second terminal fitting components are fixed to each other, thereby obtaining the terminal fitting.

Method of fixing terminal fitting components to each other and terminal fitting

A wire-connecting device including a joint terminal for connecting an inner conductor of a coaxial cable and a core wire of an electric wire, and a heat-shrinkable member for covering at least the joint terminal and a cut edge of a braided wire of the coaxial cable exposed at the joint terminal.

Wire-connecting device

In a method of notifying messages in a radio selective call receiver, a call which includes an identifier and a message is received. In a normal mode, arrival of the call is notified and the message of the call is displayed as a normal mode message, when the identifier of the call is same as that allocated to the receiver as a self identifier. An operation mode is automatically switched from the normal mode into an emergency mode when the identifier of the call is a common identifier and the message is a first predetermined message. In the emergency mode, arrival of the call is notified and the message of the call is displayed as an individual emergency message, when the identifier of the call is same as the self identifier. Also, in the emergency mode, arrival of the call is notified and the message of the call is displayed as a common emergency message, when the identifier of the call is same as the common identifier.

Selective radio call receiver capable of receiving common data in emergency mode

A transistor circuit that ensures signal transmission between adjoining direct-coupled stages at a low supply voltage even when an input signal is in a high level. This transistor circuit is comprised of a first stage having a first transistor and a first load connected to a collector or drain of the first transistor, and a second stage having a second transistor. An input voltage is applied to a base or gate of the first transistor in the first stage. The first transistor produces a first output current flowing through the first load according to the input voltage, thereby outputting a first output voltage at the collector or drain of the first transistor The first output voltage from the first stage is applied to a base or gate of the second transistor in the second stage without using any coupling capacitor. The first load has a variable resistance responsive to a magnitude of a dc component of the first output current. When the magnitude of the dc component of the first output current is increased from a predetermined value due to a magnitude increase of the input voltage, thereby decreasing a magnitude of a dc component of the first output voltage, the variable resistance of the first load is decreased so as to compensate the decreased magnitude of the dc component of the first output voltage. The effect caused by the operating point shift is compensated.

Transistor circuit with direct-coupled stages

A radio paging receiver which stores messages accompanied by paging calls into directories corresponding to paging numbers and displays the stored messages in a particular directory together and successively, in which the directory which has the highest preferential ranking to display stored messages is determined by an user of the radio paging receiver, or from among the directories which correspond to a plurality of paging numbers selected by the user the highest preferential display ranking is given to the directory corresponding to the paging number of the latest paging call

Radio paging receiver with message displaying function and method of controlling the same

A wireless selective call receiver includes an operation unit having at least one operation element which is operated by a user. A detecting unit detects a first predetermined operation of the operation element in a normal mode to generate a menu display signal, and detects a second predetermined operation of the operation element in a selection mode to generate an item designation signal. A control unit controls a display unit to display a predetermined type of data in the normal mode. The control unit responds to the menu display signal to set the selection mode and to control the display unit to display a first menu such that items of the first menu are scrolled while each of the items of the first menu is displayed one by one in a predetermined area. The control unit selects a specific one of the items of the first menu in the selection mode in response to the item designation signal inputted from the detecting unit when the specific item is displayed in the predetermined area.

Method of selecting menu and wireless selective call receiver to which

Color LCD 7 of a radio selective calling receiver with a display function which displays, on the background of rows of letter characters displayed in blue, picture information such as a battery voltage drop mark in red, which is different from the displaying color of the letter characters, in the full area of the display screen.

Radio selective calling receiver with display function and a picture

A radio selective calling receiver with display, having a plurality of functions which can be set by a user, including a menu window display unit for displaying the plurality of functions which can be set. A function use/disuse setting determination unit is provided for setting use/disuse of one of the plurality of functions displayed on a menu window, and a function limiting/displaying unit for displaying only functions for use on the menu window through the menu window display in function setting after setting use/disuse of the function.

Growing community of inventors

Shizuoka, Japan

Jun Uchida