Illuminator

Details Illuminator Illuminator

2006-02-28

2006-02-28

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Combined load device or load device temperature modifying...

Discharge device load

C313S573000

Reexamination Certificate

active

07005803

ABSTRACT:
An illuminator capable of increasing the service life of discharge tubes, includes a pair of an ultraviolet light-emitting discharge tube and a white visible light-emitting discharge tube that are alternately and periodically placed in a lighted state and an unlighted state, such that a state of illumination using only one of the discharge tubes is realized in at least part of a time domain during the repetition period. The illuminator includes a hot-cathode tube used for at least one of the discharge tubes, the hot-cathode tube being arranged in a state where a heating power supply for heating filaments, and an illuminating power supply for enabling motion of thermoelectrons within the hot-cathode tube and at the same time periodic repetition of the lighted state and unlighted state, are capable of executing and interrupting application of voltage, independently of each other.

REFERENCES:
patent: 5319282 (1994-06-01), Winsor
patent: 5466990 (1995-11-01), Winsor
patent: 5866994 (1999-02-01), Nakano
patent: 6036334 (2000-03-01), Nakano
patent: 6127780 (2000-10-01), Winsor
patent: 6396081 (2002-05-01), Tews et al.
patent: 6871972 (2005-03-01), Ju

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