Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Sumio Tate

Kazuyuki Nakashima

Shinobu Kamizuru

Seiji Manabe

Kensei Fukuda

Takahiro Oomori

Kazuhiko Sugimoto

Futoshi Deguchi

Kaoru Sato

Fumiyasu Konno

Akio Hidaka

Makoto Okazaki

Yasunobu Tsukio

Katsumi Sasaki

Masaharu Miyahara

Kazuhisa Ide

Toshihiro Koga

Tatsuya Hiwatashi

Yasuhiro Fujiwara

Kenji Suga

Akihiko Hirata

Shigeki Takeuchi

Toshinori Komesu

Mikio Tomisaki

Yoshinobu Kuwamoto

Hidekazu Hata

Makoto Takashiro

Takao Saito

Isao Egami

Koji Ipposhi

Hisao Tada

A sound reproduction device of the present disclosure includes a detection device that detects an object in a detecting area, and a superdirective speaker that can output a sound. In the superdirective speaker, directivity is set for the detecting area. When the detection device detects the object in the detecting area, the superdirective speaker outputs a sound to the detecting area.

Sound reproduction device and sound reproduction system

A surface lighting device has one single light source and a light-guide-board. The board includes a light-guiding-section and a light-emitting-section. A shorter side of the light-guiding-section is not more than 8 mm, and an area of the light-emitting-section is not less than 500 mm2. The light-emitting-section has the following features: (1) a ratio of min. luminance vs. max. luminance of is not less than 0.3; (2) an average luminance ranges from 1 cd/mto 200 cd/m, and (3) a change value in luminance per unit length is not more than (average luminance)&#xd7;100 cd/m. Employing plural light-emitting-elements in the light source allows the lighting device to produce versatile colors. The light source, light-guide-board and a holder are structured and shaped in optimum way, so that unevenness in luminance of the device is reduced. An LCD unit incorporating this surface lighting device increases its display quality, and a portable terminal incorporating this LCD unit produces easy-to-lead display.

Surface lighting device and portable terminal using the same

A surface lighting device has one single light source and a light-guide-board. The board includes a light-guiding-section and a light-emitting-section. A shorter side of the light-guiding-section is not more than 8 mm, and an area of the light-emitting-section is not less than 500 mm. The light-emitting-section has the following features: (1) a ratio of min. luminance vs. max. luminance is not less than 0.3; (2) an average luminance ranges from 1 cd/mto 200 cd/m, and (3) a change in luminance per unit length is not more than (average luminance)&#xd7;100 cd/m. Employing plural light-emitting-elements in one light source allows the lighting device to produce versatile colors. The light source, light-guide-board and a holder are structured and shaped in optimum way, so that unevenness in luminance of the device is reduced. An LCD unit incorporating this surface lighting device increases its display quality, and a portable terminal incorporating this LCD unit produces easy-to-lead display.

An antenna device includes: a radiator having a meander portion; and a conductor shorter than the radiator which is disposed opposite to the radiator. A coaxial cable is connected to the radiator and conductor. Respective line lengths of the radiator and conductor satisfy a predetermined relation with respect to a wavelength of a signal to be transmitted and received. The antenna device achieves at least one of improved antenna characteristics, downsizing, and improved mechanical strength.

Antenna device and mobile communications apparatus including the device

The cooling element of the present invention comprises a base section in contact with a heat producing element, and a heat dissipation section integrally formed with the base section. The cooling element of the present invention is constructed such that a ratio of T (a thickness of the base section) to L (a reference length, namely, a shortest width or an external diameter of the base section disposed right above the heat producing element) is within a range of not less than 0.14 and not more than 0.24. The cooling element of the present invention comprises a base section in contact with a heat producing element and a heat dissipation element integrally formed with the base section. The cooling element of the present invention is constructed such that a ratio of d (a length of the base section at around the center) to L2 (a longest length or an external diameter of said base section) is not less than 0.5.

Cooling element and cooling apparatus using the same

The present invention aims at providing an electronic component that can be readily reduced in size. Further, even when the electronic component is reduced in size, the miniaturized electronic component has (i) a wide range in capacitance, (ii) is allowed to be produced easily, (iii) has excellent electrical characteristics and (iv) can prevent defects due to a poor connection between the electronic component and a circuit board caused by warpage of the circuit board and the like when the electronic component is connected to the circuit board. The electronic component includes a capacitor element with a pair of lead terminals and an exterior packaging material disposed so as to encapsulate the capacitor element. The maximum length of the exterior packaging material is 7.5 mm or less and the maximum length of the capacitor element is 5.5 mm or less. Capacitance C of the capacitor element satisfies an inequality of 4 pF&lE;C&lE;4700 pF and a DC break down voltage BDV satisfies an inequality of BDV&gE;4.5 KV. The smallest spacing between the pair of lead terminals ranges from 3.0 mm to 6.0 mm.

Electronic component

An antenna device includes radiation elements formed on a common antenna board, a feeding unit for feeding the radiation elements, and a ground plate provided in electrically-spaced relation to the radiation elements. The ground plate is mounted on a box-like metal body to form a short-circuit therewith. The radiation elements may have different line lengths for transmitting and receiving a plurality of wavelengths. The feeding unit may include a first radiation element having a different electrical length than a second radiation element, a first feed point for feeding electric power to the first radiation element, and a second feed point for feeding radiation elements are grounded to the ground plate at respective first and second ground points. The difference from the first and second feed points to their respective ground points are different from one another. The antenna device may have a value equal to (H)&divide;(&Lgr;), where (H) is the distance between the radiation elements and the ground plate, and (&Lgr;) is a wavelength of at least one frequency transmitted or received by the antenna device, and the distance H satisfies a relationship of 1&divide;250&lE;(H)&divide;(&Lgr;)&lE;1&divide;100.

Antenna device

A card reader is provided inside of a body cover which has a card transfer path, a card transfer mechanism including a series of card transfer rollers and driven rollers, and a second antenna unit defining a wireless communication device which is positioned between the card transfer path and the body cover (,). Thus, wireless transmission and reception of data can be executed with the second antenna unit by bringing a card having a first antenna unit in close proximity to a card access area provided on the body cover, and also by inserting the card in the card transfer path.

Card reader

It is intended to provide a heat sink unit and an electronic apparatus capable of efficiently cooling a plurality of semiconductor devices and taking action for unnecessary electromagnetic waves. There are provided a plurality of fan units and electromagnetic shielding means for cutting off electromagnetic waves on a heat sink substrate. It is also provided a heat sink substrate, a unit having a fan for supplying fluid to the heat sink substrate and driving means for rotating the fan, and electromagnetic shielding means provided for the heat sink substrate.

Heat sink unit for cooling a plurality of exothermic units, and electronic apparatus comprising the same

In an optical pickup, an optical guide member is provided in an optical path of light from a light source, and has a plurality of inclined surfaces inclined with respect to a light beam emitted from the light source. A light-receiving element is provided for receiving light and for converting the received light into an electrical signal. The optical guide member and the light-receiving element are contained in a packaging member. The light beam from the light source is reflected by the plurality of inclined surfaces of the optical guide member, and then are directed to a recording medium. The reflected light from the recording medium is directed to the light-receiving element. At least one of dry air and inert gas such as nitrogen gas is charged in the interior of the packaging member at a pressure of 0.5 atm to 1.5 atm, thereby preventing the optical characteristics from being degraded.

Integrated type optical pickup having packaging with gas-tight seal

Growing community of inventors

Fukuoka, Japan

Sumio Tate