Stanley Electric Co., Ltd

Other

Osamu Miyata

Hisao Hirata

Daisuke Uchida

Toshiyuki Kondo

Youichi Yamamoto

Youji Oki

Yasuhisa Yaguchi

Katsunori Kawano

Kunio Iwaki

Isamu Satoh

A lighting lampusing LED lamps as a light source can include a delay circuit, a power supply control unit, and a timer circuit. The delay circuitcan be configured to cause the luminous intensity of the LED lamps to rise along a predetermined slope upon turning on the lighting lamp. The power supply control unit and the timer circuit can be configured to cause the luminous intensity of the LED lamps to fall along a predetermined slope which has an inflection point P at a predetermined time point along the slope.

Lighting lamp

The objectives of the present invention is to provide smaller, lighter and less expensive structure in a starting device for discharge lamp for car use so as to prevent breakage due to vibrations etc. The device having the following arrangement realizes the above-mentioned objective. A starting device for a discharge lamp comprises a socket for mounting the discharge lamp and starting members such as a starting transformer etc. where the starting transformer comprises a bobbin having a core-less structure and a primary coil and a secondary coil wound around the bobbin.

Starting device for discharge lamp

A vehicle discharge lighting unit can include a bulb mounting slot provided in a resin base. The mounting slot has a channel diameter that fits with an outer bulb of a lamp. A flange can be provided for mounting the resin base to a reflector. A burner band mounting section of the base can extend towards the lamp along a discharge chamber direction and project within the reflector. The driver case can also be separated into a front case and a rear case. The resin base and the driver case can therefore be most appropriately shaped while also having improved dielectric strength. When either of the base or the driver case is defective, only the part that is defective needs to be replaced.

Vehicle lighting unit

One of the objectives of the present invention are to provide smaller, lighter and less expensive structure in a starting device for discharge lamp for car use so as to prevent breakage due to vibrations etc . . . And another objective is to attain simultaneous electrical and structural connections between a high voltage electrode and a coil of a starting transformer. The device having the following constitution realizes the above-mentioned objectives. A starting device for a discharge lamp comprises a socket equipped with a high voltage electrode and a grounding electrode, a bobbin with a core-less structure, a starting transformer comprising a primary coil and a secondary coil wound around the bobbin. A screw electrode is arranged at the center of the end face of the bobbin. One end of the screw electrode is connected to an output terminal of the high voltage side of the secondary coil on the starting transformer. And the other end of the screw electrode is screwed and connected to a terminal of a high voltage side of the socket.

An inverter apparatus for converting a direct current which flows through the primary side of an output transformer to an alternating current which is outputted from the secondary side of the transformer. Switching elements are used to interrupt the flow of the direct current through the primary of the output transformer and frequency control means is provided for driving the switching elements at the resonant frequency of the resonant circuit formed by the secondary of the output transformer and the load. A circuit for altering the pulse width of the output signal is also provided for controling the power delivered to the load.

Growing community of inventors

Tokyo, Japan

Osamu Miyata