Seiko Epson Corporation

Ngk Insulators, Inc.

Epson Toyocom Corporation

Seiko Npc Corporation

Yutaka Takada

Satoshi Fujii

Shigekazu Takagi

Kenji Sato

Kesatoshi Takeuchi

Hiroshi Miyazawa

Hiroshi Nakazato

Kuniaki Tanaka

Katsumi Shinkai

Makoto Inoguchi

Hideto Naruse

Kenji Suzuki

Takashi Endo

Masayasu Sakuma

Akihito Uetake

Junichiro Shinozaki

Masayuki Takahashi

Hideo Karasawa

Yoshiaki Matsumoto

Tatsuya Tsuruoka

Hiroyuki Moteki

Masahiro Onuki

A physical quantity measurement device includes a sensor element having a coupling capacitance formed between a drive electrode and a detection electrode, and a circuit device having a drive circuit adapted to supply a drive signal to the drive electrode, a detection circuit adapted to detect physical quantity information corresponding to a physical quantity based on a detection signal from the detection electrode, and a fault diagnosis circuit, and the fault diagnosis circuit has an electrostatic leakage component extraction circuit adapted to extract an electrostatic leakage component due to the coupling capacitance from one of the detection signal and an amplified signal of the detection signal, and performs a fault diagnosis based on the electrostatic leakage component extracted.

Physical quantity measurement device, electronic apparatus, and vehicle

A physical quantity detection system includes first and second physical quantity sensors, first and second power supply lines to which a power supply voltage is applied, a first decoupling circuit with first band elimination frequency characteristics, and a second decoupling circuit with second band elimination frequency characteristics. A relationship of a cutoff frequency on a low frequency side of the first band elimination frequency characteristics&#x3c;a first drive frequency of a first drive circuit&#x3c;a cutoff frequency on a high frequency side of the first band elimination frequency characteristics is satisfied, and a relationship of a cutoff frequency on a low frequency side of the second band elimination frequency characteristics&#x3c;a second drive frequency of a second drive circuit&#x3c;a cutoff frequency on a high frequency side of second band elimination frequency characteristics is satisfied.

Physical quantity detection system, electronic apparatus, and moving object

Dynamic range of a second amplifier which is provided in a subsequent stage of a synchronous detection circuit is set greater than dynamic range of a first amplifier which is provided in a preceding stage of the synchronous detection circuit, and thus, an output is prevented from being saturated.

Physical quantity sensor, electronic apparatus, and moving object

A physical quantity sensor includes a sensor element, an integrated circuit that is electrically connected to the sensor element, and a ceramic package (base body) on which the integrated circuit is mounted. A first conductor pattern (interconnection pattern) for electrical connection with the outside is provided on one surface of the ceramic package. A second conductor pattern is provided to be electrically connected to the interconnection pattern. The second conductor pattern includes an interconnection pattern that passes through the inside of the ceramic package, and a metallized region that is exposed on the other surface of the ceramic package. The interconnection pattern is longer than a distance between the one surface and the other surface of the ceramic package.

An angular velocity detection apparatus includes a vibrator that generates a signal that includes an angular velocity component and a vibration leakage component, a driver section that generates the drive signal, and supplies the drive signal to the vibrator, an angular velocity signal generation section that extracts the angular velocity component from the signal generated by the vibrator, and generates an angular velocity signal corresponding to the magnitude of the angular velocity component, a vibration leakage signal generation section that extracts the vibration leakage component from the signal generated by the vibrator, and generates a vibration leakage signal corresponding to the magnitude of the vibration leakage component, and an adder-subtractor section that adds the vibration leakage signal to the angular velocity signal, or subtracts the vibration leakage signal from the angular velocity signal, in a given ratio to correct temperature characteristics of the angular velocity signal.

Angular velocity detection apparatus and electronic instrument

An angular velocity detection apparatus (i.e., physical quantity detection apparatus) includes a gyro sensor element (i.e., physical quantity detection element) that allows an angular velocity detection signal that corresponds to the magnitude of an angular velocity (i.e., physical quantity) and a leakage signal of vibrations based on a drive signal (square-wave voltage signal) to flow through a detection electrode, a driver circuit that generates the drive signal, a synchronous detection circuit that performs a synchronous detection process on a detection target signal that includes the angular velocity detection signal and the leakage signal based on a detection signal that is synchronized with the drive signal, and a phase change circuit that changes a relative timing of at least one of a rising edge and a falling edge of the detection signal with respect to the detection target signal based on a control signal so that at least part of the leakage signal is output by the synchronous detection process.

Physical quantity detection apparatus, method of controlling physical quantity detection apparatus, abnormality diagnosis system, and abnormality diagnosis method

An optical source device includes a solid high frequency oscillating unit that outputs a high frequency signal, a waveguide that receives the high frequency signal output from the solid high frequency oscillating unit and radiates the received high frequency signal as a microwave, and a light emitting unit that emits light by the microwave radiated from the waveguide unit. A container of the waveguide unit has a space surrounded by reflective surfaces that reflect the microwave radiated from the antenna unit so as to collect the microwave. A projector includes this optical source device, an optical modulating unit that modulates a light beam emitted from the light emitting unit of the optical source device according to image information to form an optical image, and a projecting unit that projects the optical image formed by the optical modulating unit.

Light source device and projector including light source device

A lamp includes a light emitter enclosing a material emitting light upon receiving irradiation of microwave, and a coil formed on an outer side of the light emitter. In the lamp, a position of the coil with respect to the light emitter is changed in response to a temperature.

Lamp, light-emitting device, and projector

To provide a projector using a light source device that is rapidly and reliably turned on and can stably obtain a desired amount of light and a method of rapidly and reliably turning on a light source device of a projector. A power control unit adjusts the amplification factor of an amplifying unit for microwaves such that microwave power having a pulse form that is higher than the microwave power radiated to keep an electrodeless lamp emitting light is radiated to turn on the electrodeless lamp. Therefore, a microwave having predetermined power is radiated to the electrodeless lamp at once.

Projector and method of turning on light source device of projector

A light source device includes a microwave generating section for generating a microwave, a reflector connected to the microwave generating section, and a microwave electrodeless lamp disposed inside a cavity, the cavity including the reflector and a metallic chamber covering an opening section of the reflector. The chamber includes a tube member having an opening section for communicating the inside and the outside of the cavity to lead a light flux out of the chamber, and a bore diameter, D of the opening section, a length L of the tube member, a wavelength &#x3bb; of the microwave, and a wavelength &#x39b; of the light flux satisfy &#x39b;&#x3c;D&#x2266;(&#xbc;)&#x3bb;, L&#x2267;(&#xbc;)&#x3bb;, and D+L=(&#xbd;)&#x3bb;.

Light source device and projector

The invention provides an optical source device and a projector including the optical source device, in which a microwave is used to reduce the size, and increase the life span. The optical source device according to the invention includes a solid high frequency oscillating unit that outputs a high frequency signal, a waveguide that receives the high frequency signal output from the solid high frequency oscillating unit and radiates the received high frequency signal as a microwave, and a light emitting unit that emits light by the microwave radiated from the waveguide unit. A container of the waveguide unit has a space surrounded by reflective surfaces that reflect the microwave radiated from the antenna unit so as to collect the microwave. The projector includes this optical source device, an optical modulating unit that modulates a light beam emitted from the light emitting unit of the optical source device according to image information to form an optical image, and a projecting unit that projects the optical image formed by the optical modulating unit.

A light-emitting device, includes: an emitter sealed with a gas emitting light caused by a microwave; a high frequency power supply section including a diamond SAW oscillator and outputting a high frequency signal being output from the diamond SAW oscillator to a subsequent stage; and a waveguide unit emitting the high frequency signal being input from the high frequency power supply section towards the emitter as the microwave.

Light-emitting device

A high-frequency heating device including: a solid-state oscillator that generates a microwave; an amplifier that amplifies the microwave generated by the solid-state oscillator; an isolator that is connected to a stage subsequent to the amplifier and blocks a reflected wave directed from an object exposed with the microwave; an antenna that irradiates the microwave toward the object; and a metal cavity that traps therein the microwave irradiated to the object.

Growing community of inventors

Minamiminowa-mura, Japan

Yutaka Takada