Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Photo & Lighting Co., Ltd.

Katsushi Sumisaki

Katsuji Ishikawa

Katsumi Horinishi

Katsunori Kawabata

Hajime Mitsui

Arata Sakamoto

Hisashi Ogura

Hirohiko Ina

Mitsuo Fuke

Takashi Umehara

Shohei Uno

Toshinori Maki

Naoyuki Furutsuka

Kazue Nakagawa

Tsunemi Yoshino

Toshihiko Taniguchi

Erika Kawabata

Satoshi Amari

A light emitting element drive device of the present invention includes a light emitting element; a drive unit for driving the light emitting element; an electricity storage element capable of storing electric power; a battery power supply capable of supplying electric power to the electricity storage element; and a boost chopper circuit having an inductor, for boosting voltage by opening and closing a switching element. The drive unit is switchable between three states: a storing state in which electric power from the battery power supply is stored in the electricity storage element; a first discharging state in which the electric power stored in the electricity storage element is supplied to the light emitting element; and a second discharging state in which electric power from the battery power supply is boosted by the boost chopper circuit and is supplied to the light emitting element.

Light emitting element drive device and mobile apparatus

A discharge tube of the present invention includes a glass bulb in which noble gas is enclosed, a pair of electrodes protruding from both ends of the glass bulb in the longitudinal direction of the glass bulb, and a connector connected to each of the electrodes. Each of the electrodes includes at least an axis section and a large-diameter section with a step section and a circumferential face. The step section has a first latching section for latching onto the connector. The circumferential face has a contact section with which the connector comes in contact. The connector includes a connector body into which the electrode is inserted, a second latching section for latching onto the first latching section of the electrode, and a connecting section connected to the contact section of the electrode. This achieves a discharge tube with high connection reliability and high heat radiation efficiency, and a light-emitting apparatus provided with this discharge tube.

Discharge tube and light-emitting apparatus provided with discharge tube

The electronic flash unit disclosed comprises: a transformer () to vary voltages of a power supply; an accumulator () composed of a main capacitor () to charge an electric energy supplied from the transformer (); a lamp unit () provided with a flashlamp (), set inside of a reflector (), that flashes by discharging of energy storages in the main capacitor () upon applying a voltage on a trigger terminal (); and a trigger circuit () to generate the voltage to apply on the trigger terminal (), wherein at least the lamp unit () is coated with an insulation material.

Electronic flash unit and manufacturing method thereof

Growing community of inventors

Osaka, Japan

Katsushi Sumisaki