Kyocera Corporation

Matsushita Electric Works, Ltd.

Matsushita Electric Industrial Co., Ltd.

Murata Manufacturing Co., Ltd.

Sk-electronics Co., Ltd.

Koji Yamashita

Kenichi Fukuda

Hiroshi Nohara

Takeshi Kogure

Shiro Sugimura

Akihiro Kishimoto

Atsushi Utsubo

Yukiya Kanazawa

Takuya Hayashi

Shuichi Yamamoto

Takeshi Hasegawa

Noriyuki Fukumori

Hideki Kobayashi

Koji Noro

Kiyoshi Ohshima

Toshiaki Sasaki

Takaaki Sakai

Takeshi Abiru

An RFID tagwith a boost antenna includes a boost antennaand an RFID tag, wherein the boost antennaincludes: a radiation unitwhich is conductive; a ground unitwhich faces the radiation unitand is conductive; and a short circuit unitwhich connects one end of the radiation unitand one end of the ground unit, and electrically connecting the radiation unitand the ground unitwith each other, and wherein the RFID tagis arranged at a position close to the short circuit uniton the ground unit, wherein each of the boost antennaand the RFID taghas resonance characteristics.

RFID tag with boost antenna, conductor provided with RFID tag with boost antenna, and RFID system including RFID tag with boost antenna

Provided is an LC resonant antenna including: an inductor layer provided with a coil-shaped inductor; and a capacitor layer laminated on the inductor layer in a direction of an axis along a coil center of the inductor. The capacitor layer includes a capacitor connected to the inductor. The capacitor includes a pair of electrode plates arranged in parallel at a distance from each other in a laminating direction.

LC resonant antenna

A front-end module includes a duplexer, a band pass filter, and a terminating circuit element. A first signal path connects an output terminal of a power amplifier and a transmit node of the duplexer. The band pass filter is disposed on a second signal path between a branch point and a ground. The second signal path branches off from the first signal path at the branch point. The band pass filter has frequency characteristics in which, among frequency components of a transmit signal output from the power amplifier, frequency components that overlap at least part of the pass band of a receive filter of the duplexer are allowed to pass through the band pass filter. The terminating circuit element is disposed on the second signal path between the band pass filter and the ground. The terminating circuit element attenuates a transmit signal passing through the band pass filter.

Front-end module

Even if a DC output voltage of a step-down chopper circuit () is lowered from a value in a non-lighted state or a no-load state due to a discharge occurring between conductors () in a cable (), the turn on detection circuit () can discriminates between lighted and non-lighted states without erroneously determining such a discharge as a discharge in a discharge lamp (). This allows an operation of the timer () to be continued, so that high-voltage pulses are intermittently applied to prevent continuous discharge between the conductors () and abnormal heat generation in the cable (). Further, even if a discharge occurs in an outer tube of the discharge lamp (), the turn on detection circuit () never erroneously discriminates this discharge as the lighted state. Thus, the lighting device of the present invention can suppress abnormal heat generations in the components and a socket ().

Device for turning on high-pressure discharge lamp and lighting apparatus equipped with the device

Disclosed is a lighting system capable of preventing damage to an outer-tube resulting from an outer-tube discharge that often occurs at the end of useful life of a lamp. The lighting system includes: a metal halide lamp having an arc tube housed within an outer tube; and a lamp .lighting device for operating the metal halide lamp. The lamp lighting device includes: a power supply unit operable to supply an electric power to the metal halide lamp; a detecting unit operable to detect an electrical property of the metal halide lamp; a judging unit operable to judge, based on the detected electrical property, whether a currently occurring discharge is an outer-tube discharge; and an instructing unit operable to instruct the power supply unit to suspend or reduce the electric power supply to the metal halide lamp upon a judgment that the currently occurring discharge is an outer-tube discharge. The detection unit detects a lamp voltage. The judging unit judges that the currently occurring discharge is an outer-tube discharge if the detected lamp voltage differs from a lamp voltage under normal operation.

Lighting system

Growing community of inventors

Kyoto, Japan

Koji Yamashita