Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Hirohiko Oowaki

Tetsuro Mizushima

Tatsuo Itoh

Kenji Nakayama

Tomohiro Matsuo

Fuminobu Furukawa

Masayuki Shiwa

Kensei Fukuda

Tsuyoshi Kakuta

The present application discloses a wavelength conversion device. The wavelength conversion device includes a light source for generating excitation light, a laser medium for generating fundamental light from the excitation light, a resonator mirror for forming a resonator for the fundamental light in cooperation with the laser medium, and a wavelength convertor for converting wavelength from the fundamental light into harmonic light. The wavelength convertor includes a first end surface inclined by an angle &#x3b8; from a surface orthogonal to an optical axis of the resonator and a second end surface parallel to the first end surface.

Wavelength conversion device and image display device

The invention provides a motor which can reduce a generation of a cogging, has a thin size, and can generate a strong torque. In a motor having an armature including a back yoke formed in a cylindrical shape and a wound coil and a magnet formed in a cylindrical shape and magnetized by a plurality of magnetic poles on a cylindrical circumferential surface, the back yoke forms a convex portion protruding from the back yoke toward the magnet in a current switching portion of the coil. The invention further provided a disc apparatus using the motor mentioned above.

Motor having characteristic structure in armature and disc apparatus

There is disclosed a medium attaching device and a disk drive apparatus which are suited for a compact and lightweight design and a thin design, and are capable of automatic attachment of a disk. The device includes a rotary support device for holding a disk medium thereon, and a rotation drive device for rotating the rotary support means so as to rotate the disk medium. The rotation drive device includes a reciprocally-moving device for reciprocal movement in a direction of an axis of a rotation shaft. The rotary support device has a plurality of pivotal attaching devices pivotally mounted thereon, and each of the pivotal attaching devices is pivotally movable between a fixed position where the pivotal attaching device fixedly holds the disk medium and a received position where the pivotal attaching device is received in the rotary support device. The plurality of pivotal attaching devices are provided on the rotary support device in concentric relation to the axis of the rotation shaft. The pivotal attaching devices are engaged with the reciprocally-moving device, and are pivotally moved by the reciprocal movement of the reciprocally-moving device, thereby fixing and releasing the disk medium relative to the rotary support device.

Medium attaching device and disk drive apparatus

Growing community of inventors

Fukuoka, Japan

Hirohiko Oowaki