Kyocera Corporation

Yasuhiro Katayama

Satoshi Mizuta

Tomoaki Miyano

Toshihisa Nabata

Kiyokazu Sato

Shun Kazama

Akio Kihara

Masayuki Saito

Tadashi Koyama

Kenji Waku

Katsuji Morishita

Shinobu Kato

Kihara Akio

Provided is an electronic device that can be appropriately used as a type of electronic device that vibrates a panel attached to a housing. The electronic device includes a piezoelectric element, a panel, to which the piezoelectric element is attached, that vibrates due to the piezoelectric element to generate a vibration sound transmitted by vibrating a part of a human body, a housing supporting the panel with a first face, a microphone contained within the housing and disposed on a second face, and a buffer that damps vibration transmitted from the panel to the microphone through the first face and/or the second face, thereby reducing noise picked up by the microphone.

Electronic device

Provided is an electronic device including a housing and an acoustic device configured to generate vibration sound that is transmitted through vibration of a part of a human body. The acoustic device includes a panel configured to be joined to the housing; a piezoelectric element configured to be joined to the panel for vibrating the panel; and a vibration adjusting unit configured to be joined to the panel and vibrated together with the panel by the piezoelectric element. With the above configuration, a frequency characteristic is improved.

The content of sound leakage from a vibrating plate that vibrates due to a piezoelectric element is made difficult to recognize. An electronic device () according to the present invention includes a piezoelectric element () and a vibrating plate () that vibrates due to the piezoelectric element (), the electronic device () causing the vibrating plate () to generate air-conducted sound and vibration sound that is transmitted by vibrating a part of a human body. The electronic device () also includes an air-conducted sound reducing unit that makes a portion or all of the air-conducted sound difficult to hear.

In order to be appropriately usable as an electric device for vibrating a panel attached to a housing, an electronic device including a piezoelectric element; a housing having a first principle plane having the piezoelectric element fixed thereto and a second principle plane opposite to the first principle plane; and a lid member having a joint portion for removably joining to the second principle plane; causes the housing to generate sound transmitted by vibrating a part of a human body, such that the piezoelectric element is provided on a first side in a first direction parallel to the first principle plane, and a joint position of the joint portion is provided on a second side opposite to the first side in the first direction.

Provided is an electronic device that is capable of reducing sound leakage from a vibration plate vibrated by a piezoelectric element. An electronic deviceof the present invention includes: a piezoelectric element; and a vibration plateconfigured to be vibrated by the piezoelectric element. Vibration sound is transmitted by the vibration plate vibrating a part of a human body. The piezoelectric elementis vibrated using a processed sound signal in which at least a part of frequency components of a sound reproduction signal that are higher than a predetermined threshold value is cut or attenuated.

Electronic device that vibrates an element for sound transmission

Provided is an electronic device including: a piezoelectric element; a vibration plate to which the piezoelectric element is joined for vibration; and a housing to which the vibration plate is joined. Vibration sound, which is transmitted by vibrating a part of a human body, is generated by the vibration plate. The vibration plate includes, in a plan view thereof, a first area including a joining portion with the piezoelectric element and a second area located further away from the joining portion than the first area is, and rigidity in a first area is lower than rigidity in the second area. With the above configuration, sound leakage or the like is reduced, and usability of the electronic device is improved.

A portable electronic device and a magnetic field antenna circuit are provided for making it possible to keep an antenna resonance frequency in a fixed range even if temperature changes. A mobile telephone device () is provided with a second communication unit driven by a chargeable battery () to execute a predetermined function and an RFID unit () accompanied with magnetic communication. The RFID unit () includes a magnetic antenna unit (), which can transmit or receive a wireless signal by a magnetic field, and a capacitor (), one terminal of which is connected with the magnetic antenna unit () to generate a predetermined resonance frequency. The capacitor () is characterized in having a temperature-reactance characteristic reverse to an amount of an inductance value that fluctuates as the magnetic antenna unit () changes in accordance with temperatures.

Growing community of inventors

Yokohama, Japan

Yasuhiro Katayama