Toshiba Lighting & Technology Corporation

Yoshiaki Hara

Masaharu Baba

Teiji Shimokawa

Masami Kobayashi

A discharge lamp lighting apparatus includes a discharge lamp having a pair of electrodes, at least one electrode being placed on an outer surface of a discharge vessel containing an inert gas-dominated discharge agent, a high frequency generator having an output transformer and a switching apparatus, a high frequency operation detector for detecting a high frequency and outputting a high frequency operation detection signal, a controlling responsive to the high frequency operation detection signal for performing a feedback control to the switching apparatus to make the high frequency operation detection signal a first level and protecting the apparatus when the high frequency operation detection signal is changed to a second level, and a no-load detector for forcefully changing the high frequency operation detection signal supplied to the controller to the second level when detected the nonleaded state.

Discharge lamp lighting apparatus and lighting appliance employing same

A lamp device is constituted by an assembly consisting of a holder and a lamp and can be detachably attached to an installation hole of a print board or the like. The lamp device internally includes a flickering circuit for flickering the lamp. The holder comprises first, second, and third contact members for electrically connecting a power supply terminal of the print board with the lamp, and a flickering circuit element is contained in the holder. The first contact member has contacts with the power supply terminal and with a lead of the lamp. The second contact member has contacts with another lead of the lamp and with a terminal of the flickering circuit element. The third contact member has contacts with another terminal of the flickering circuit element and the power supply terminal.

Growing community of inventors

Kanagawa-ken, Japan

Yoshiaki Hara