Electric lamp and discharge devices: systems – Pulsating or a.c. supply
Reexamination Certificate
2005-06-14
2005-06-14
Wong, Don (Department: 2821)
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
C315S291000, C313S485000
Reexamination Certificate
active
06906475
ABSTRACT:
The present invention improves the luminous efficiency of lamps that emit light due to electric discharge, such as a fluorescent lamp and an HID lamp. The fluorescent lamp includes a glass tube used as a fluorescent tube made of a glass material containing an emissive element. When exposed to ultraviolet light (with the peak wavelength of 251 nm) emitted due to mercury excitation, the emissive element emits ultraviolet light having a longer wavelength than that. The HID lamp includes an envelop made of a glass material that contains an emissive element. When exposed to ultraviolet light emitted due to excitation of an emissive material enclosed in an arc tube, the emissive element emits ultraviolet light having a longer wavelength than that.
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Matsushita Electric - Industrial Co., Ltd.
Tran Chuc
Wong Don
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